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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/memstick/core
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/memstick/core')
-rw-r--r--kernel/drivers/memstick/core/Kconfig38
-rw-r--r--kernel/drivers/memstick/core/Makefile7
-rw-r--r--kernel/drivers/memstick/core/memstick.c654
-rw-r--r--kernel/drivers/memstick/core/ms_block.c2385
-rw-r--r--kernel/drivers/memstick/core/ms_block.h290
-rw-r--r--kernel/drivers/memstick/core/mspro_block.c1488
6 files changed, 4862 insertions, 0 deletions
diff --git a/kernel/drivers/memstick/core/Kconfig b/kernel/drivers/memstick/core/Kconfig
new file mode 100644
index 000000000..1d389491d
--- /dev/null
+++ b/kernel/drivers/memstick/core/Kconfig
@@ -0,0 +1,38 @@
+#
+# MemoryStick core configuration
+#
+
+comment "MemoryStick drivers"
+
+config MEMSTICK_UNSAFE_RESUME
+ bool "Allow unsafe resume (DANGEROUS)"
+ help
+ If you say Y here, the MemoryStick layer will assume that all
+ cards stayed in their respective slots during the suspend. The
+ normal behaviour is to remove them at suspend and
+ redetecting them at resume. Breaking this assumption will
+ in most cases result in data corruption.
+
+ This option is usually just for embedded systems which use
+ a MemoryStick card for rootfs. Most people should say N here.
+
+config MSPRO_BLOCK
+ tristate "MemoryStick Pro block device driver"
+ depends on BLOCK
+ help
+ Say Y here to enable the MemoryStick Pro block device driver
+ support. This provides a block device driver, which you can use
+ to mount the filesystem. Almost everyone wishing MemoryStick
+ support should say Y or M here.
+
+config MS_BLOCK
+ tristate "MemoryStick Standard device driver"
+ depends on BLOCK
+ help
+ Say Y here to enable the MemoryStick Standard device driver
+ support. This provides a block device driver, which you can use
+ to mount the filesystem.
+ This driver works with old (bulky) MemoryStick and MemoryStick Duo
+ but not PRO. Say Y if you have such card.
+ Driver is new and not yet well tested, thus it can damage your card
+ (even permanently)
diff --git a/kernel/drivers/memstick/core/Makefile b/kernel/drivers/memstick/core/Makefile
new file mode 100644
index 000000000..0d7f90c0f
--- /dev/null
+++ b/kernel/drivers/memstick/core/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the kernel MemoryStick core.
+#
+
+obj-$(CONFIG_MEMSTICK) += memstick.o
+obj-$(CONFIG_MS_BLOCK) += ms_block.o
+obj-$(CONFIG_MSPRO_BLOCK) += mspro_block.o
diff --git a/kernel/drivers/memstick/core/memstick.c b/kernel/drivers/memstick/core/memstick.c
new file mode 100644
index 000000000..a0547dbf9
--- /dev/null
+++ b/kernel/drivers/memstick/core/memstick.c
@@ -0,0 +1,654 @@
+/*
+ * Sony MemoryStick support
+ *
+ * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Special thanks to Carlos Corbacho for providing various MemoryStick cards
+ * that made this driver possible.
+ *
+ */
+
+#include <linux/memstick.h>
+#include <linux/idr.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+#define DRIVER_NAME "memstick"
+
+static unsigned int cmd_retries = 3;
+module_param(cmd_retries, uint, 0644);
+
+static struct workqueue_struct *workqueue;
+static DEFINE_IDR(memstick_host_idr);
+static DEFINE_SPINLOCK(memstick_host_lock);
+
+static int memstick_dev_match(struct memstick_dev *card,
+ struct memstick_device_id *id)
+{
+ if (id->match_flags & MEMSTICK_MATCH_ALL) {
+ if ((id->type == card->id.type)
+ && (id->category == card->id.category)
+ && (id->class == card->id.class))
+ return 1;
+ }
+
+ return 0;
+}
+
+static int memstick_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+ struct memstick_driver *ms_drv = container_of(drv,
+ struct memstick_driver,
+ driver);
+ struct memstick_device_id *ids = ms_drv->id_table;
+
+ if (ids) {
+ while (ids->match_flags) {
+ if (memstick_dev_match(card, ids))
+ return 1;
+ ++ids;
+ }
+ }
+ return 0;
+}
+
+static int memstick_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+
+ if (add_uevent_var(env, "MEMSTICK_TYPE=%02X", card->id.type))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "MEMSTICK_CATEGORY=%02X", card->id.category))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "MEMSTICK_CLASS=%02X", card->id.class))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int memstick_device_probe(struct device *dev)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+ struct memstick_driver *drv = container_of(dev->driver,
+ struct memstick_driver,
+ driver);
+ int rc = -ENODEV;
+
+ if (dev->driver && drv->probe) {
+ rc = drv->probe(card);
+ if (!rc)
+ get_device(dev);
+ }
+ return rc;
+}
+
+static int memstick_device_remove(struct device *dev)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+ struct memstick_driver *drv = container_of(dev->driver,
+ struct memstick_driver,
+ driver);
+
+ if (dev->driver && drv->remove) {
+ drv->remove(card);
+ card->dev.driver = NULL;
+ }
+
+ put_device(dev);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int memstick_device_suspend(struct device *dev, pm_message_t state)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+ struct memstick_driver *drv = container_of(dev->driver,
+ struct memstick_driver,
+ driver);
+
+ if (dev->driver && drv->suspend)
+ return drv->suspend(card, state);
+ return 0;
+}
+
+static int memstick_device_resume(struct device *dev)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+ struct memstick_driver *drv = container_of(dev->driver,
+ struct memstick_driver,
+ driver);
+
+ if (dev->driver && drv->resume)
+ return drv->resume(card);
+ return 0;
+}
+
+#else
+
+#define memstick_device_suspend NULL
+#define memstick_device_resume NULL
+
+#endif /* CONFIG_PM */
+
+#define MEMSTICK_ATTR(name, format) \
+static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ struct memstick_dev *card = container_of(dev, struct memstick_dev, \
+ dev); \
+ return sprintf(buf, format, card->id.name); \
+} \
+static DEVICE_ATTR_RO(name);
+
+MEMSTICK_ATTR(type, "%02X");
+MEMSTICK_ATTR(category, "%02X");
+MEMSTICK_ATTR(class, "%02X");
+
+static struct attribute *memstick_dev_attrs[] = {
+ &dev_attr_type.attr,
+ &dev_attr_category.attr,
+ &dev_attr_class.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(memstick_dev);
+
+static struct bus_type memstick_bus_type = {
+ .name = "memstick",
+ .dev_groups = memstick_dev_groups,
+ .match = memstick_bus_match,
+ .uevent = memstick_uevent,
+ .probe = memstick_device_probe,
+ .remove = memstick_device_remove,
+ .suspend = memstick_device_suspend,
+ .resume = memstick_device_resume
+};
+
+static void memstick_free(struct device *dev)
+{
+ struct memstick_host *host = container_of(dev, struct memstick_host,
+ dev);
+ kfree(host);
+}
+
+static struct class memstick_host_class = {
+ .name = "memstick_host",
+ .dev_release = memstick_free
+};
+
+static void memstick_free_card(struct device *dev)
+{
+ struct memstick_dev *card = container_of(dev, struct memstick_dev,
+ dev);
+ kfree(card);
+}
+
+static int memstick_dummy_check(struct memstick_dev *card)
+{
+ return 0;
+}
+
+/**
+ * memstick_detect_change - schedule media detection on memstick host
+ * @host - host to use
+ */
+void memstick_detect_change(struct memstick_host *host)
+{
+ queue_work(workqueue, &host->media_checker);
+}
+EXPORT_SYMBOL(memstick_detect_change);
+
+/**
+ * memstick_next_req - called by host driver to obtain next request to process
+ * @host - host to use
+ * @mrq - pointer to stick the request to
+ *
+ * Host calls this function from idle state (*mrq == NULL) or after finishing
+ * previous request (*mrq should point to it). If previous request was
+ * unsuccessful, it is retried for predetermined number of times. Return value
+ * of 0 means that new request was assigned to the host.
+ */
+int memstick_next_req(struct memstick_host *host, struct memstick_request **mrq)
+{
+ int rc = -ENXIO;
+
+ if ((*mrq) && (*mrq)->error && host->retries) {
+ (*mrq)->error = rc;
+ host->retries--;
+ return 0;
+ }
+
+ if (host->card && host->card->next_request)
+ rc = host->card->next_request(host->card, mrq);
+
+ if (!rc)
+ host->retries = cmd_retries > 1 ? cmd_retries - 1 : 1;
+ else
+ *mrq = NULL;
+
+ return rc;
+}
+EXPORT_SYMBOL(memstick_next_req);
+
+/**
+ * memstick_new_req - notify the host that some requests are pending
+ * @host - host to use
+ */
+void memstick_new_req(struct memstick_host *host)
+{
+ if (host->card) {
+ host->retries = cmd_retries;
+ reinit_completion(&host->card->mrq_complete);
+ host->request(host);
+ }
+}
+EXPORT_SYMBOL(memstick_new_req);
+
+/**
+ * memstick_init_req_sg - set request fields needed for bulk data transfer
+ * @mrq - request to use
+ * @tpc - memstick Transport Protocol Command
+ * @sg - TPC argument
+ */
+void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc,
+ const struct scatterlist *sg)
+{
+ mrq->tpc = tpc;
+ if (tpc & 8)
+ mrq->data_dir = WRITE;
+ else
+ mrq->data_dir = READ;
+
+ mrq->sg = *sg;
+ mrq->long_data = 1;
+
+ if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD)
+ mrq->need_card_int = 1;
+ else
+ mrq->need_card_int = 0;
+}
+EXPORT_SYMBOL(memstick_init_req_sg);
+
+/**
+ * memstick_init_req - set request fields needed for short data transfer
+ * @mrq - request to use
+ * @tpc - memstick Transport Protocol Command
+ * @buf - TPC argument buffer
+ * @length - TPC argument size
+ *
+ * The intended use of this function (transfer of data items several bytes
+ * in size) allows us to just copy the value between request structure and
+ * user supplied buffer.
+ */
+void memstick_init_req(struct memstick_request *mrq, unsigned char tpc,
+ const void *buf, size_t length)
+{
+ mrq->tpc = tpc;
+ if (tpc & 8)
+ mrq->data_dir = WRITE;
+ else
+ mrq->data_dir = READ;
+
+ mrq->data_len = length > sizeof(mrq->data) ? sizeof(mrq->data) : length;
+ if (mrq->data_dir == WRITE)
+ memcpy(mrq->data, buf, mrq->data_len);
+
+ mrq->long_data = 0;
+
+ if (tpc == MS_TPC_SET_CMD || tpc == MS_TPC_EX_SET_CMD)
+ mrq->need_card_int = 1;
+ else
+ mrq->need_card_int = 0;
+}
+EXPORT_SYMBOL(memstick_init_req);
+
+/*
+ * Functions prefixed with "h_" are protocol callbacks. They can be called from
+ * interrupt context. Return value of 0 means that request processing is still
+ * ongoing, while special error value of -EAGAIN means that current request is
+ * finished (and request processor should come back some time later).
+ */
+
+static int h_memstick_read_dev_id(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ struct ms_id_register id_reg;
+
+ if (!(*mrq)) {
+ memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
+ sizeof(struct ms_id_register));
+ *mrq = &card->current_mrq;
+ return 0;
+ } else {
+ if (!(*mrq)->error) {
+ memcpy(&id_reg, (*mrq)->data, sizeof(id_reg));
+ card->id.match_flags = MEMSTICK_MATCH_ALL;
+ card->id.type = id_reg.type;
+ card->id.category = id_reg.category;
+ card->id.class = id_reg.class;
+ dev_dbg(&card->dev, "if_mode = %02x\n", id_reg.if_mode);
+ }
+ complete(&card->mrq_complete);
+ return -EAGAIN;
+ }
+}
+
+static int h_memstick_set_rw_addr(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ if (!(*mrq)) {
+ memstick_init_req(&card->current_mrq, MS_TPC_SET_RW_REG_ADRS,
+ (char *)&card->reg_addr,
+ sizeof(card->reg_addr));
+ *mrq = &card->current_mrq;
+ return 0;
+ } else {
+ complete(&card->mrq_complete);
+ return -EAGAIN;
+ }
+}
+
+/**
+ * memstick_set_rw_addr - issue SET_RW_REG_ADDR request and wait for it to
+ * complete
+ * @card - media device to use
+ */
+int memstick_set_rw_addr(struct memstick_dev *card)
+{
+ card->next_request = h_memstick_set_rw_addr;
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+
+ return card->current_mrq.error;
+}
+EXPORT_SYMBOL(memstick_set_rw_addr);
+
+static struct memstick_dev *memstick_alloc_card(struct memstick_host *host)
+{
+ struct memstick_dev *card = kzalloc(sizeof(struct memstick_dev),
+ GFP_KERNEL);
+ struct memstick_dev *old_card = host->card;
+ struct ms_id_register id_reg;
+
+ if (card) {
+ card->host = host;
+ dev_set_name(&card->dev, "%s", dev_name(&host->dev));
+ card->dev.parent = &host->dev;
+ card->dev.bus = &memstick_bus_type;
+ card->dev.release = memstick_free_card;
+ card->check = memstick_dummy_check;
+
+ card->reg_addr.r_offset = offsetof(struct ms_register, id);
+ card->reg_addr.r_length = sizeof(id_reg);
+ card->reg_addr.w_offset = offsetof(struct ms_register, id);
+ card->reg_addr.w_length = sizeof(id_reg);
+
+ init_completion(&card->mrq_complete);
+
+ host->card = card;
+ if (memstick_set_rw_addr(card))
+ goto err_out;
+
+ card->next_request = h_memstick_read_dev_id;
+ memstick_new_req(host);
+ wait_for_completion(&card->mrq_complete);
+
+ if (card->current_mrq.error)
+ goto err_out;
+ }
+ host->card = old_card;
+ return card;
+err_out:
+ host->card = old_card;
+ kfree(card);
+ return NULL;
+}
+
+static int memstick_power_on(struct memstick_host *host)
+{
+ int rc = host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
+
+ if (!rc)
+ rc = host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
+
+ return rc;
+}
+
+static void memstick_check(struct work_struct *work)
+{
+ struct memstick_host *host = container_of(work, struct memstick_host,
+ media_checker);
+ struct memstick_dev *card;
+
+ dev_dbg(&host->dev, "memstick_check started\n");
+ mutex_lock(&host->lock);
+ if (!host->card) {
+ if (memstick_power_on(host))
+ goto out_power_off;
+ } else if (host->card->stop)
+ host->card->stop(host->card);
+
+ card = memstick_alloc_card(host);
+
+ if (!card) {
+ if (host->card) {
+ device_unregister(&host->card->dev);
+ host->card = NULL;
+ }
+ } else {
+ dev_dbg(&host->dev, "new card %02x, %02x, %02x\n",
+ card->id.type, card->id.category, card->id.class);
+ if (host->card) {
+ if (memstick_set_rw_addr(host->card)
+ || !memstick_dev_match(host->card, &card->id)
+ || !(host->card->check(host->card))) {
+ device_unregister(&host->card->dev);
+ host->card = NULL;
+ } else if (host->card->start)
+ host->card->start(host->card);
+ }
+
+ if (!host->card) {
+ host->card = card;
+ if (device_register(&card->dev)) {
+ put_device(&card->dev);
+ kfree(host->card);
+ host->card = NULL;
+ }
+ } else
+ kfree(card);
+ }
+
+out_power_off:
+ if (!host->card)
+ host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+
+ mutex_unlock(&host->lock);
+ dev_dbg(&host->dev, "memstick_check finished\n");
+}
+
+/**
+ * memstick_alloc_host - allocate a memstick_host structure
+ * @extra: size of the user private data to allocate
+ * @dev: parent device of the host
+ */
+struct memstick_host *memstick_alloc_host(unsigned int extra,
+ struct device *dev)
+{
+ struct memstick_host *host;
+
+ host = kzalloc(sizeof(struct memstick_host) + extra, GFP_KERNEL);
+ if (host) {
+ mutex_init(&host->lock);
+ INIT_WORK(&host->media_checker, memstick_check);
+ host->dev.class = &memstick_host_class;
+ host->dev.parent = dev;
+ device_initialize(&host->dev);
+ }
+ return host;
+}
+EXPORT_SYMBOL(memstick_alloc_host);
+
+/**
+ * memstick_add_host - start request processing on memstick host
+ * @host - host to use
+ */
+int memstick_add_host(struct memstick_host *host)
+{
+ int rc;
+
+ idr_preload(GFP_KERNEL);
+ spin_lock(&memstick_host_lock);
+
+ rc = idr_alloc(&memstick_host_idr, host, 0, 0, GFP_NOWAIT);
+ if (rc >= 0)
+ host->id = rc;
+
+ spin_unlock(&memstick_host_lock);
+ idr_preload_end();
+ if (rc < 0)
+ return rc;
+
+ dev_set_name(&host->dev, "memstick%u", host->id);
+
+ rc = device_add(&host->dev);
+ if (rc) {
+ spin_lock(&memstick_host_lock);
+ idr_remove(&memstick_host_idr, host->id);
+ spin_unlock(&memstick_host_lock);
+ return rc;
+ }
+
+ host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+ memstick_detect_change(host);
+ return 0;
+}
+EXPORT_SYMBOL(memstick_add_host);
+
+/**
+ * memstick_remove_host - stop request processing on memstick host
+ * @host - host to use
+ */
+void memstick_remove_host(struct memstick_host *host)
+{
+ flush_workqueue(workqueue);
+ mutex_lock(&host->lock);
+ if (host->card)
+ device_unregister(&host->card->dev);
+ host->card = NULL;
+ host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+ mutex_unlock(&host->lock);
+
+ spin_lock(&memstick_host_lock);
+ idr_remove(&memstick_host_idr, host->id);
+ spin_unlock(&memstick_host_lock);
+ device_del(&host->dev);
+}
+EXPORT_SYMBOL(memstick_remove_host);
+
+/**
+ * memstick_free_host - free memstick host
+ * @host - host to use
+ */
+void memstick_free_host(struct memstick_host *host)
+{
+ mutex_destroy(&host->lock);
+ put_device(&host->dev);
+}
+EXPORT_SYMBOL(memstick_free_host);
+
+/**
+ * memstick_suspend_host - notify bus driver of host suspension
+ * @host - host to use
+ */
+void memstick_suspend_host(struct memstick_host *host)
+{
+ mutex_lock(&host->lock);
+ host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+ mutex_unlock(&host->lock);
+}
+EXPORT_SYMBOL(memstick_suspend_host);
+
+/**
+ * memstick_resume_host - notify bus driver of host resumption
+ * @host - host to use
+ */
+void memstick_resume_host(struct memstick_host *host)
+{
+ int rc = 0;
+
+ mutex_lock(&host->lock);
+ if (host->card)
+ rc = memstick_power_on(host);
+ mutex_unlock(&host->lock);
+
+ if (!rc)
+ memstick_detect_change(host);
+}
+EXPORT_SYMBOL(memstick_resume_host);
+
+int memstick_register_driver(struct memstick_driver *drv)
+{
+ drv->driver.bus = &memstick_bus_type;
+
+ return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL(memstick_register_driver);
+
+void memstick_unregister_driver(struct memstick_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL(memstick_unregister_driver);
+
+
+static int __init memstick_init(void)
+{
+ int rc;
+
+ workqueue = create_freezable_workqueue("kmemstick");
+ if (!workqueue)
+ return -ENOMEM;
+
+ rc = bus_register(&memstick_bus_type);
+ if (!rc)
+ rc = class_register(&memstick_host_class);
+
+ if (!rc)
+ return 0;
+
+ bus_unregister(&memstick_bus_type);
+ destroy_workqueue(workqueue);
+
+ return rc;
+}
+
+static void __exit memstick_exit(void)
+{
+ class_unregister(&memstick_host_class);
+ bus_unregister(&memstick_bus_type);
+ destroy_workqueue(workqueue);
+ idr_destroy(&memstick_host_idr);
+}
+
+module_init(memstick_init);
+module_exit(memstick_exit);
+
+MODULE_AUTHOR("Alex Dubov");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Sony MemoryStick core driver");
diff --git a/kernel/drivers/memstick/core/ms_block.c b/kernel/drivers/memstick/core/ms_block.c
new file mode 100644
index 000000000..24f2f8473
--- /dev/null
+++ b/kernel/drivers/memstick/core/ms_block.c
@@ -0,0 +1,2385 @@
+/*
+ * ms_block.c - Sony MemoryStick (legacy) storage support
+
+ * Copyright (C) 2013 Maxim Levitsky <maximlevitsky@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Minor portions of the driver were copied from mspro_block.c which is
+ * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
+ *
+ */
+#define DRIVER_NAME "ms_block"
+#define pr_fmt(fmt) DRIVER_NAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/memstick.h>
+#include <linux/idr.h>
+#include <linux/hdreg.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/bitmap.h>
+#include <linux/scatterlist.h>
+#include <linux/jiffies.h>
+#include <linux/workqueue.h>
+#include <linux/mutex.h>
+#include "ms_block.h"
+
+static int debug;
+static int cache_flush_timeout = 1000;
+static bool verify_writes;
+
+/*
+ * Copies section of 'sg_from' starting from offset 'offset' and with length
+ * 'len' To another scatterlist of to_nents enties
+ */
+static size_t msb_sg_copy(struct scatterlist *sg_from,
+ struct scatterlist *sg_to, int to_nents, size_t offset, size_t len)
+{
+ size_t copied = 0;
+
+ while (offset > 0) {
+ if (offset >= sg_from->length) {
+ if (sg_is_last(sg_from))
+ return 0;
+
+ offset -= sg_from->length;
+ sg_from = sg_next(sg_from);
+ continue;
+ }
+
+ copied = min(len, sg_from->length - offset);
+ sg_set_page(sg_to, sg_page(sg_from),
+ copied, sg_from->offset + offset);
+
+ len -= copied;
+ offset = 0;
+
+ if (sg_is_last(sg_from) || !len)
+ goto out;
+
+ sg_to = sg_next(sg_to);
+ to_nents--;
+ sg_from = sg_next(sg_from);
+ }
+
+ while (len > sg_from->length && to_nents--) {
+ len -= sg_from->length;
+ copied += sg_from->length;
+
+ sg_set_page(sg_to, sg_page(sg_from),
+ sg_from->length, sg_from->offset);
+
+ if (sg_is_last(sg_from) || !len)
+ goto out;
+
+ sg_from = sg_next(sg_from);
+ sg_to = sg_next(sg_to);
+ }
+
+ if (len && to_nents) {
+ sg_set_page(sg_to, sg_page(sg_from), len, sg_from->offset);
+ copied += len;
+ }
+out:
+ sg_mark_end(sg_to);
+ return copied;
+}
+
+/*
+ * Compares section of 'sg' starting from offset 'offset' and with length 'len'
+ * to linear buffer of length 'len' at address 'buffer'
+ * Returns 0 if equal and -1 otherwice
+ */
+static int msb_sg_compare_to_buffer(struct scatterlist *sg,
+ size_t offset, u8 *buffer, size_t len)
+{
+ int retval = 0, cmplen;
+ struct sg_mapping_iter miter;
+
+ sg_miter_start(&miter, sg, sg_nents(sg),
+ SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+
+ while (sg_miter_next(&miter) && len > 0) {
+ if (offset >= miter.length) {
+ offset -= miter.length;
+ continue;
+ }
+
+ cmplen = min(miter.length - offset, len);
+ retval = memcmp(miter.addr + offset, buffer, cmplen) ? -1 : 0;
+ if (retval)
+ break;
+
+ buffer += cmplen;
+ len -= cmplen;
+ offset = 0;
+ }
+
+ if (!retval && len)
+ retval = -1;
+
+ sg_miter_stop(&miter);
+ return retval;
+}
+
+
+/* Get zone at which block with logical address 'lba' lives
+ * Flash is broken into zones.
+ * Each zone consists of 512 eraseblocks, out of which in first
+ * zone 494 are used and 496 are for all following zones.
+ * Therefore zone #0 hosts blocks 0-493, zone #1 blocks 494-988, etc...
+*/
+static int msb_get_zone_from_lba(int lba)
+{
+ if (lba < 494)
+ return 0;
+ return ((lba - 494) / 496) + 1;
+}
+
+/* Get zone of physical block. Trivial */
+static int msb_get_zone_from_pba(int pba)
+{
+ return pba / MS_BLOCKS_IN_ZONE;
+}
+
+/* Debug test to validate free block counts */
+static int msb_validate_used_block_bitmap(struct msb_data *msb)
+{
+ int total_free_blocks = 0;
+ int i;
+
+ if (!debug)
+ return 0;
+
+ for (i = 0; i < msb->zone_count; i++)
+ total_free_blocks += msb->free_block_count[i];
+
+ if (msb->block_count - bitmap_weight(msb->used_blocks_bitmap,
+ msb->block_count) == total_free_blocks)
+ return 0;
+
+ pr_err("BUG: free block counts don't match the bitmap");
+ msb->read_only = true;
+ return -EINVAL;
+}
+
+/* Mark physical block as used */
+static void msb_mark_block_used(struct msb_data *msb, int pba)
+{
+ int zone = msb_get_zone_from_pba(pba);
+
+ if (test_bit(pba, msb->used_blocks_bitmap)) {
+ pr_err(
+ "BUG: attempt to mark already used pba %d as used", pba);
+ msb->read_only = true;
+ return;
+ }
+
+ if (msb_validate_used_block_bitmap(msb))
+ return;
+
+ /* No races because all IO is single threaded */
+ __set_bit(pba, msb->used_blocks_bitmap);
+ msb->free_block_count[zone]--;
+}
+
+/* Mark physical block as free */
+static void msb_mark_block_unused(struct msb_data *msb, int pba)
+{
+ int zone = msb_get_zone_from_pba(pba);
+
+ if (!test_bit(pba, msb->used_blocks_bitmap)) {
+ pr_err("BUG: attempt to mark already unused pba %d as unused" , pba);
+ msb->read_only = true;
+ return;
+ }
+
+ if (msb_validate_used_block_bitmap(msb))
+ return;
+
+ /* No races because all IO is single threaded */
+ __clear_bit(pba, msb->used_blocks_bitmap);
+ msb->free_block_count[zone]++;
+}
+
+/* Invalidate current register window */
+static void msb_invalidate_reg_window(struct msb_data *msb)
+{
+ msb->reg_addr.w_offset = offsetof(struct ms_register, id);
+ msb->reg_addr.w_length = sizeof(struct ms_id_register);
+ msb->reg_addr.r_offset = offsetof(struct ms_register, id);
+ msb->reg_addr.r_length = sizeof(struct ms_id_register);
+ msb->addr_valid = false;
+}
+
+/* Start a state machine */
+static int msb_run_state_machine(struct msb_data *msb, int (*state_func)
+ (struct memstick_dev *card, struct memstick_request **req))
+{
+ struct memstick_dev *card = msb->card;
+
+ WARN_ON(msb->state != -1);
+ msb->int_polling = false;
+ msb->state = 0;
+ msb->exit_error = 0;
+
+ memset(&card->current_mrq, 0, sizeof(card->current_mrq));
+
+ card->next_request = state_func;
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+
+ WARN_ON(msb->state != -1);
+ return msb->exit_error;
+}
+
+/* State machines call that to exit */
+static int msb_exit_state_machine(struct msb_data *msb, int error)
+{
+ WARN_ON(msb->state == -1);
+
+ msb->state = -1;
+ msb->exit_error = error;
+ msb->card->next_request = h_msb_default_bad;
+
+ /* Invalidate reg window on errors */
+ if (error)
+ msb_invalidate_reg_window(msb);
+
+ complete(&msb->card->mrq_complete);
+ return -ENXIO;
+}
+
+/* read INT register */
+static int msb_read_int_reg(struct msb_data *msb, long timeout)
+{
+ struct memstick_request *mrq = &msb->card->current_mrq;
+
+ WARN_ON(msb->state == -1);
+
+ if (!msb->int_polling) {
+ msb->int_timeout = jiffies +
+ msecs_to_jiffies(timeout == -1 ? 500 : timeout);
+ msb->int_polling = true;
+ } else if (time_after(jiffies, msb->int_timeout)) {
+ mrq->data[0] = MEMSTICK_INT_CMDNAK;
+ return 0;
+ }
+
+ if ((msb->caps & MEMSTICK_CAP_AUTO_GET_INT) &&
+ mrq->need_card_int && !mrq->error) {
+ mrq->data[0] = mrq->int_reg;
+ mrq->need_card_int = false;
+ return 0;
+ } else {
+ memstick_init_req(mrq, MS_TPC_GET_INT, NULL, 1);
+ return 1;
+ }
+}
+
+/* Read a register */
+static int msb_read_regs(struct msb_data *msb, int offset, int len)
+{
+ struct memstick_request *req = &msb->card->current_mrq;
+
+ if (msb->reg_addr.r_offset != offset ||
+ msb->reg_addr.r_length != len || !msb->addr_valid) {
+
+ msb->reg_addr.r_offset = offset;
+ msb->reg_addr.r_length = len;
+ msb->addr_valid = true;
+
+ memstick_init_req(req, MS_TPC_SET_RW_REG_ADRS,
+ &msb->reg_addr, sizeof(msb->reg_addr));
+ return 0;
+ }
+
+ memstick_init_req(req, MS_TPC_READ_REG, NULL, len);
+ return 1;
+}
+
+/* Write a card register */
+static int msb_write_regs(struct msb_data *msb, int offset, int len, void *buf)
+{
+ struct memstick_request *req = &msb->card->current_mrq;
+
+ if (msb->reg_addr.w_offset != offset ||
+ msb->reg_addr.w_length != len || !msb->addr_valid) {
+
+ msb->reg_addr.w_offset = offset;
+ msb->reg_addr.w_length = len;
+ msb->addr_valid = true;
+
+ memstick_init_req(req, MS_TPC_SET_RW_REG_ADRS,
+ &msb->reg_addr, sizeof(msb->reg_addr));
+ return 0;
+ }
+
+ memstick_init_req(req, MS_TPC_WRITE_REG, buf, len);
+ return 1;
+}
+
+/* Handler for absence of IO */
+static int h_msb_default_bad(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ return -ENXIO;
+}
+
+/*
+ * This function is a handler for reads of one page from device.
+ * Writes output to msb->current_sg, takes sector address from msb->reg.param
+ * Can also be used to read extra data only. Set params accordintly.
+ */
+static int h_msb_read_page(struct memstick_dev *card,
+ struct memstick_request **out_mrq)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_request *mrq = *out_mrq = &card->current_mrq;
+ struct scatterlist sg[2];
+ u8 command, intreg;
+
+ if (mrq->error) {
+ dbg("read_page, unknown error");
+ return msb_exit_state_machine(msb, mrq->error);
+ }
+again:
+ switch (msb->state) {
+ case MSB_RP_SEND_BLOCK_ADDRESS:
+ /* msb_write_regs sometimes "fails" because it needs to update
+ the reg window, and thus it returns request for that.
+ Then we stay in this state and retry */
+ if (!msb_write_regs(msb,
+ offsetof(struct ms_register, param),
+ sizeof(struct ms_param_register),
+ (unsigned char *)&msb->regs.param))
+ return 0;
+
+ msb->state = MSB_RP_SEND_READ_COMMAND;
+ return 0;
+
+ case MSB_RP_SEND_READ_COMMAND:
+ command = MS_CMD_BLOCK_READ;
+ memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
+ msb->state = MSB_RP_SEND_INT_REQ;
+ return 0;
+
+ case MSB_RP_SEND_INT_REQ:
+ msb->state = MSB_RP_RECEIVE_INT_REQ_RESULT;
+ /* If dont actually need to send the int read request (only in
+ serial mode), then just fall through */
+ if (msb_read_int_reg(msb, -1))
+ return 0;
+ /* fallthrough */
+
+ case MSB_RP_RECEIVE_INT_REQ_RESULT:
+ intreg = mrq->data[0];
+ msb->regs.status.interrupt = intreg;
+
+ if (intreg & MEMSTICK_INT_CMDNAK)
+ return msb_exit_state_machine(msb, -EIO);
+
+ if (!(intreg & MEMSTICK_INT_CED)) {
+ msb->state = MSB_RP_SEND_INT_REQ;
+ goto again;
+ }
+
+ msb->int_polling = false;
+ msb->state = (intreg & MEMSTICK_INT_ERR) ?
+ MSB_RP_SEND_READ_STATUS_REG : MSB_RP_SEND_OOB_READ;
+ goto again;
+
+ case MSB_RP_SEND_READ_STATUS_REG:
+ /* read the status register to understand source of the INT_ERR */
+ if (!msb_read_regs(msb,
+ offsetof(struct ms_register, status),
+ sizeof(struct ms_status_register)))
+ return 0;
+
+ msb->state = MSB_RP_RECEIVE_STATUS_REG;
+ return 0;
+
+ case MSB_RP_RECEIVE_STATUS_REG:
+ msb->regs.status = *(struct ms_status_register *)mrq->data;
+ msb->state = MSB_RP_SEND_OOB_READ;
+ /* fallthrough */
+
+ case MSB_RP_SEND_OOB_READ:
+ if (!msb_read_regs(msb,
+ offsetof(struct ms_register, extra_data),
+ sizeof(struct ms_extra_data_register)))
+ return 0;
+
+ msb->state = MSB_RP_RECEIVE_OOB_READ;
+ return 0;
+
+ case MSB_RP_RECEIVE_OOB_READ:
+ msb->regs.extra_data =
+ *(struct ms_extra_data_register *) mrq->data;
+ msb->state = MSB_RP_SEND_READ_DATA;
+ /* fallthrough */
+
+ case MSB_RP_SEND_READ_DATA:
+ /* Skip that state if we only read the oob */
+ if (msb->regs.param.cp == MEMSTICK_CP_EXTRA) {
+ msb->state = MSB_RP_RECEIVE_READ_DATA;
+ goto again;
+ }
+
+ sg_init_table(sg, ARRAY_SIZE(sg));
+ msb_sg_copy(msb->current_sg, sg, ARRAY_SIZE(sg),
+ msb->current_sg_offset,
+ msb->page_size);
+
+ memstick_init_req_sg(mrq, MS_TPC_READ_LONG_DATA, sg);
+ msb->state = MSB_RP_RECEIVE_READ_DATA;
+ return 0;
+
+ case MSB_RP_RECEIVE_READ_DATA:
+ if (!(msb->regs.status.interrupt & MEMSTICK_INT_ERR)) {
+ msb->current_sg_offset += msb->page_size;
+ return msb_exit_state_machine(msb, 0);
+ }
+
+ if (msb->regs.status.status1 & MEMSTICK_UNCORR_ERROR) {
+ dbg("read_page: uncorrectable error");
+ return msb_exit_state_machine(msb, -EBADMSG);
+ }
+
+ if (msb->regs.status.status1 & MEMSTICK_CORR_ERROR) {
+ dbg("read_page: correctable error");
+ msb->current_sg_offset += msb->page_size;
+ return msb_exit_state_machine(msb, -EUCLEAN);
+ } else {
+ dbg("read_page: INT error, but no status error bits");
+ return msb_exit_state_machine(msb, -EIO);
+ }
+ }
+
+ BUG();
+}
+
+/*
+ * Handler of writes of exactly one block.
+ * Takes address from msb->regs.param.
+ * Writes same extra data to blocks, also taken
+ * from msb->regs.extra
+ * Returns -EBADMSG if write fails due to uncorrectable error, or -EIO if
+ * device refuses to take the command or something else
+ */
+static int h_msb_write_block(struct memstick_dev *card,
+ struct memstick_request **out_mrq)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_request *mrq = *out_mrq = &card->current_mrq;
+ struct scatterlist sg[2];
+ u8 intreg, command;
+
+ if (mrq->error)
+ return msb_exit_state_machine(msb, mrq->error);
+
+again:
+ switch (msb->state) {
+
+ /* HACK: Jmicon handling of TPCs between 8 and
+ * sizeof(memstick_request.data) is broken due to hardware
+ * bug in PIO mode that is used for these TPCs
+ * Therefore split the write
+ */
+
+ case MSB_WB_SEND_WRITE_PARAMS:
+ if (!msb_write_regs(msb,
+ offsetof(struct ms_register, param),
+ sizeof(struct ms_param_register),
+ &msb->regs.param))
+ return 0;
+
+ msb->state = MSB_WB_SEND_WRITE_OOB;
+ return 0;
+
+ case MSB_WB_SEND_WRITE_OOB:
+ if (!msb_write_regs(msb,
+ offsetof(struct ms_register, extra_data),
+ sizeof(struct ms_extra_data_register),
+ &msb->regs.extra_data))
+ return 0;
+ msb->state = MSB_WB_SEND_WRITE_COMMAND;
+ return 0;
+
+
+ case MSB_WB_SEND_WRITE_COMMAND:
+ command = MS_CMD_BLOCK_WRITE;
+ memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
+ msb->state = MSB_WB_SEND_INT_REQ;
+ return 0;
+
+ case MSB_WB_SEND_INT_REQ:
+ msb->state = MSB_WB_RECEIVE_INT_REQ;
+ if (msb_read_int_reg(msb, -1))
+ return 0;
+ /* fallthrough */
+
+ case MSB_WB_RECEIVE_INT_REQ:
+ intreg = mrq->data[0];
+ msb->regs.status.interrupt = intreg;
+
+ /* errors mean out of here, and fast... */
+ if (intreg & (MEMSTICK_INT_CMDNAK))
+ return msb_exit_state_machine(msb, -EIO);
+
+ if (intreg & MEMSTICK_INT_ERR)
+ return msb_exit_state_machine(msb, -EBADMSG);
+
+
+ /* for last page we need to poll CED */
+ if (msb->current_page == msb->pages_in_block) {
+ if (intreg & MEMSTICK_INT_CED)
+ return msb_exit_state_machine(msb, 0);
+ msb->state = MSB_WB_SEND_INT_REQ;
+ goto again;
+
+ }
+
+ /* for non-last page we need BREQ before writing next chunk */
+ if (!(intreg & MEMSTICK_INT_BREQ)) {
+ msb->state = MSB_WB_SEND_INT_REQ;
+ goto again;
+ }
+
+ msb->int_polling = false;
+ msb->state = MSB_WB_SEND_WRITE_DATA;
+ /* fallthrough */
+
+ case MSB_WB_SEND_WRITE_DATA:
+ sg_init_table(sg, ARRAY_SIZE(sg));
+
+ if (msb_sg_copy(msb->current_sg, sg, ARRAY_SIZE(sg),
+ msb->current_sg_offset,
+ msb->page_size) < msb->page_size)
+ return msb_exit_state_machine(msb, -EIO);
+
+ memstick_init_req_sg(mrq, MS_TPC_WRITE_LONG_DATA, sg);
+ mrq->need_card_int = 1;
+ msb->state = MSB_WB_RECEIVE_WRITE_CONFIRMATION;
+ return 0;
+
+ case MSB_WB_RECEIVE_WRITE_CONFIRMATION:
+ msb->current_page++;
+ msb->current_sg_offset += msb->page_size;
+ msb->state = MSB_WB_SEND_INT_REQ;
+ goto again;
+ default:
+ BUG();
+ }
+
+ return 0;
+}
+
+/*
+ * This function is used to send simple IO requests to device that consist
+ * of register write + command
+ */
+static int h_msb_send_command(struct memstick_dev *card,
+ struct memstick_request **out_mrq)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_request *mrq = *out_mrq = &card->current_mrq;
+ u8 intreg;
+
+ if (mrq->error) {
+ dbg("send_command: unknown error");
+ return msb_exit_state_machine(msb, mrq->error);
+ }
+again:
+ switch (msb->state) {
+
+ /* HACK: see h_msb_write_block */
+ case MSB_SC_SEND_WRITE_PARAMS: /* write param register*/
+ if (!msb_write_regs(msb,
+ offsetof(struct ms_register, param),
+ sizeof(struct ms_param_register),
+ &msb->regs.param))
+ return 0;
+ msb->state = MSB_SC_SEND_WRITE_OOB;
+ return 0;
+
+ case MSB_SC_SEND_WRITE_OOB:
+ if (!msb->command_need_oob) {
+ msb->state = MSB_SC_SEND_COMMAND;
+ goto again;
+ }
+
+ if (!msb_write_regs(msb,
+ offsetof(struct ms_register, extra_data),
+ sizeof(struct ms_extra_data_register),
+ &msb->regs.extra_data))
+ return 0;
+
+ msb->state = MSB_SC_SEND_COMMAND;
+ return 0;
+
+ case MSB_SC_SEND_COMMAND:
+ memstick_init_req(mrq, MS_TPC_SET_CMD, &msb->command_value, 1);
+ msb->state = MSB_SC_SEND_INT_REQ;
+ return 0;
+
+ case MSB_SC_SEND_INT_REQ:
+ msb->state = MSB_SC_RECEIVE_INT_REQ;
+ if (msb_read_int_reg(msb, -1))
+ return 0;
+ /* fallthrough */
+
+ case MSB_SC_RECEIVE_INT_REQ:
+ intreg = mrq->data[0];
+
+ if (intreg & MEMSTICK_INT_CMDNAK)
+ return msb_exit_state_machine(msb, -EIO);
+ if (intreg & MEMSTICK_INT_ERR)
+ return msb_exit_state_machine(msb, -EBADMSG);
+
+ if (!(intreg & MEMSTICK_INT_CED)) {
+ msb->state = MSB_SC_SEND_INT_REQ;
+ goto again;
+ }
+
+ return msb_exit_state_machine(msb, 0);
+ }
+
+ BUG();
+}
+
+/* Small handler for card reset */
+static int h_msb_reset(struct memstick_dev *card,
+ struct memstick_request **out_mrq)
+{
+ u8 command = MS_CMD_RESET;
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_request *mrq = *out_mrq = &card->current_mrq;
+
+ if (mrq->error)
+ return msb_exit_state_machine(msb, mrq->error);
+
+ switch (msb->state) {
+ case MSB_RS_SEND:
+ memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
+ mrq->need_card_int = 0;
+ msb->state = MSB_RS_CONFIRM;
+ return 0;
+ case MSB_RS_CONFIRM:
+ return msb_exit_state_machine(msb, 0);
+ }
+ BUG();
+}
+
+/* This handler is used to do serial->parallel switch */
+static int h_msb_parallel_switch(struct memstick_dev *card,
+ struct memstick_request **out_mrq)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_request *mrq = *out_mrq = &card->current_mrq;
+ struct memstick_host *host = card->host;
+
+ if (mrq->error) {
+ dbg("parallel_switch: error");
+ msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
+ return msb_exit_state_machine(msb, mrq->error);
+ }
+
+ switch (msb->state) {
+ case MSB_PS_SEND_SWITCH_COMMAND:
+ /* Set the parallel interface on memstick side */
+ msb->regs.param.system |= MEMSTICK_SYS_PAM;
+
+ if (!msb_write_regs(msb,
+ offsetof(struct ms_register, param),
+ 1,
+ (unsigned char *)&msb->regs.param))
+ return 0;
+
+ msb->state = MSB_PS_SWICH_HOST;
+ return 0;
+
+ case MSB_PS_SWICH_HOST:
+ /* Set parallel interface on our side + send a dummy request
+ to see if card responds */
+ host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
+ memstick_init_req(mrq, MS_TPC_GET_INT, NULL, 1);
+ msb->state = MSB_PS_CONFIRM;
+ return 0;
+
+ case MSB_PS_CONFIRM:
+ return msb_exit_state_machine(msb, 0);
+ }
+
+ BUG();
+}
+
+static int msb_switch_to_parallel(struct msb_data *msb);
+
+/* Reset the card, to guard against hw errors beeing treated as bad blocks */
+static int msb_reset(struct msb_data *msb, bool full)
+{
+
+ bool was_parallel = msb->regs.param.system & MEMSTICK_SYS_PAM;
+ struct memstick_dev *card = msb->card;
+ struct memstick_host *host = card->host;
+ int error;
+
+ /* Reset the card */
+ msb->regs.param.system = MEMSTICK_SYS_BAMD;
+
+ if (full) {
+ error = host->set_param(host,
+ MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+ if (error)
+ goto out_error;
+
+ msb_invalidate_reg_window(msb);
+
+ error = host->set_param(host,
+ MEMSTICK_POWER, MEMSTICK_POWER_ON);
+ if (error)
+ goto out_error;
+
+ error = host->set_param(host,
+ MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
+ if (error) {
+out_error:
+ dbg("Failed to reset the host controller");
+ msb->read_only = true;
+ return -EFAULT;
+ }
+ }
+
+ error = msb_run_state_machine(msb, h_msb_reset);
+ if (error) {
+ dbg("Failed to reset the card");
+ msb->read_only = true;
+ return -ENODEV;
+ }
+
+ /* Set parallel mode */
+ if (was_parallel)
+ msb_switch_to_parallel(msb);
+ return 0;
+}
+
+/* Attempts to switch interface to parallel mode */
+static int msb_switch_to_parallel(struct msb_data *msb)
+{
+ int error;
+
+ error = msb_run_state_machine(msb, h_msb_parallel_switch);
+ if (error) {
+ pr_err("Switch to parallel failed");
+ msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
+ msb_reset(msb, true);
+ return -EFAULT;
+ }
+
+ msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
+ return 0;
+}
+
+/* Changes overwrite flag on a page */
+static int msb_set_overwrite_flag(struct msb_data *msb,
+ u16 pba, u8 page, u8 flag)
+{
+ if (msb->read_only)
+ return -EROFS;
+
+ msb->regs.param.block_address = cpu_to_be16(pba);
+ msb->regs.param.page_address = page;
+ msb->regs.param.cp = MEMSTICK_CP_OVERWRITE;
+ msb->regs.extra_data.overwrite_flag = flag;
+ msb->command_value = MS_CMD_BLOCK_WRITE;
+ msb->command_need_oob = true;
+
+ dbg_verbose("changing overwrite flag to %02x for sector %d, page %d",
+ flag, pba, page);
+ return msb_run_state_machine(msb, h_msb_send_command);
+}
+
+static int msb_mark_bad(struct msb_data *msb, int pba)
+{
+ pr_notice("marking pba %d as bad", pba);
+ msb_reset(msb, true);
+ return msb_set_overwrite_flag(
+ msb, pba, 0, 0xFF & ~MEMSTICK_OVERWRITE_BKST);
+}
+
+static int msb_mark_page_bad(struct msb_data *msb, int pba, int page)
+{
+ dbg("marking page %d of pba %d as bad", page, pba);
+ msb_reset(msb, true);
+ return msb_set_overwrite_flag(msb,
+ pba, page, ~MEMSTICK_OVERWRITE_PGST0);
+}
+
+/* Erases one physical block */
+static int msb_erase_block(struct msb_data *msb, u16 pba)
+{
+ int error, try;
+ if (msb->read_only)
+ return -EROFS;
+
+ dbg_verbose("erasing pba %d", pba);
+
+ for (try = 1; try < 3; try++) {
+ msb->regs.param.block_address = cpu_to_be16(pba);
+ msb->regs.param.page_address = 0;
+ msb->regs.param.cp = MEMSTICK_CP_BLOCK;
+ msb->command_value = MS_CMD_BLOCK_ERASE;
+ msb->command_need_oob = false;
+
+
+ error = msb_run_state_machine(msb, h_msb_send_command);
+ if (!error || msb_reset(msb, true))
+ break;
+ }
+
+ if (error) {
+ pr_err("erase failed, marking pba %d as bad", pba);
+ msb_mark_bad(msb, pba);
+ }
+
+ dbg_verbose("erase success, marking pba %d as unused", pba);
+ msb_mark_block_unused(msb, pba);
+ __set_bit(pba, msb->erased_blocks_bitmap);
+ return error;
+}
+
+/* Reads one page from device */
+static int msb_read_page(struct msb_data *msb,
+ u16 pba, u8 page, struct ms_extra_data_register *extra,
+ struct scatterlist *sg, int offset)
+{
+ int try, error;
+
+ if (pba == MS_BLOCK_INVALID) {
+ unsigned long flags;
+ struct sg_mapping_iter miter;
+ size_t len = msb->page_size;
+
+ dbg_verbose("read unmapped sector. returning 0xFF");
+
+ local_irq_save(flags);
+ sg_miter_start(&miter, sg, sg_nents(sg),
+ SG_MITER_ATOMIC | SG_MITER_TO_SG);
+
+ while (sg_miter_next(&miter) && len > 0) {
+
+ int chunklen;
+
+ if (offset && offset >= miter.length) {
+ offset -= miter.length;
+ continue;
+ }
+
+ chunklen = min(miter.length - offset, len);
+ memset(miter.addr + offset, 0xFF, chunklen);
+ len -= chunklen;
+ offset = 0;
+ }
+
+ sg_miter_stop(&miter);
+ local_irq_restore(flags);
+
+ if (offset)
+ return -EFAULT;
+
+ if (extra)
+ memset(extra, 0xFF, sizeof(*extra));
+ return 0;
+ }
+
+ if (pba >= msb->block_count) {
+ pr_err("BUG: attempt to read beyond the end of the card at pba %d", pba);
+ return -EINVAL;
+ }
+
+ for (try = 1; try < 3; try++) {
+ msb->regs.param.block_address = cpu_to_be16(pba);
+ msb->regs.param.page_address = page;
+ msb->regs.param.cp = MEMSTICK_CP_PAGE;
+
+ msb->current_sg = sg;
+ msb->current_sg_offset = offset;
+ error = msb_run_state_machine(msb, h_msb_read_page);
+
+
+ if (error == -EUCLEAN) {
+ pr_notice("correctable error on pba %d, page %d",
+ pba, page);
+ error = 0;
+ }
+
+ if (!error && extra)
+ *extra = msb->regs.extra_data;
+
+ if (!error || msb_reset(msb, true))
+ break;
+
+ }
+
+ /* Mark bad pages */
+ if (error == -EBADMSG) {
+ pr_err("uncorrectable error on read of pba %d, page %d",
+ pba, page);
+
+ if (msb->regs.extra_data.overwrite_flag &
+ MEMSTICK_OVERWRITE_PGST0)
+ msb_mark_page_bad(msb, pba, page);
+ return -EBADMSG;
+ }
+
+ if (error)
+ pr_err("read of pba %d, page %d failed with error %d",
+ pba, page, error);
+ return error;
+}
+
+/* Reads oob of page only */
+static int msb_read_oob(struct msb_data *msb, u16 pba, u16 page,
+ struct ms_extra_data_register *extra)
+{
+ int error;
+
+ BUG_ON(!extra);
+ msb->regs.param.block_address = cpu_to_be16(pba);
+ msb->regs.param.page_address = page;
+ msb->regs.param.cp = MEMSTICK_CP_EXTRA;
+
+ if (pba > msb->block_count) {
+ pr_err("BUG: attempt to read beyond the end of card at pba %d", pba);
+ return -EINVAL;
+ }
+
+ error = msb_run_state_machine(msb, h_msb_read_page);
+ *extra = msb->regs.extra_data;
+
+ if (error == -EUCLEAN) {
+ pr_notice("correctable error on pba %d, page %d",
+ pba, page);
+ return 0;
+ }
+
+ return error;
+}
+
+/* Reads a block and compares it with data contained in scatterlist orig_sg */
+static int msb_verify_block(struct msb_data *msb, u16 pba,
+ struct scatterlist *orig_sg, int offset)
+{
+ struct scatterlist sg;
+ int page = 0, error;
+
+ sg_init_one(&sg, msb->block_buffer, msb->block_size);
+
+ while (page < msb->pages_in_block) {
+
+ error = msb_read_page(msb, pba, page,
+ NULL, &sg, page * msb->page_size);
+ if (error)
+ return error;
+ page++;
+ }
+
+ if (msb_sg_compare_to_buffer(orig_sg, offset,
+ msb->block_buffer, msb->block_size))
+ return -EIO;
+ return 0;
+}
+
+/* Writes exectly one block + oob */
+static int msb_write_block(struct msb_data *msb,
+ u16 pba, u32 lba, struct scatterlist *sg, int offset)
+{
+ int error, current_try = 1;
+ BUG_ON(sg->length < msb->page_size);
+
+ if (msb->read_only)
+ return -EROFS;
+
+ if (pba == MS_BLOCK_INVALID) {
+ pr_err(
+ "BUG: write: attempt to write MS_BLOCK_INVALID block");
+ return -EINVAL;
+ }
+
+ if (pba >= msb->block_count || lba >= msb->logical_block_count) {
+ pr_err(
+ "BUG: write: attempt to write beyond the end of device");
+ return -EINVAL;
+ }
+
+ if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) {
+ pr_err("BUG: write: lba zone mismatch");
+ return -EINVAL;
+ }
+
+ if (pba == msb->boot_block_locations[0] ||
+ pba == msb->boot_block_locations[1]) {
+ pr_err("BUG: write: attempt to write to boot blocks!");
+ return -EINVAL;
+ }
+
+ while (1) {
+
+ if (msb->read_only)
+ return -EROFS;
+
+ msb->regs.param.cp = MEMSTICK_CP_BLOCK;
+ msb->regs.param.page_address = 0;
+ msb->regs.param.block_address = cpu_to_be16(pba);
+
+ msb->regs.extra_data.management_flag = 0xFF;
+ msb->regs.extra_data.overwrite_flag = 0xF8;
+ msb->regs.extra_data.logical_address = cpu_to_be16(lba);
+
+ msb->current_sg = sg;
+ msb->current_sg_offset = offset;
+ msb->current_page = 0;
+
+ error = msb_run_state_machine(msb, h_msb_write_block);
+
+ /* Sector we just wrote to is assumed erased since its pba
+ was erased. If it wasn't erased, write will succeed
+ and will just clear the bits that were set in the block
+ thus test that what we have written,
+ matches what we expect.
+ We do trust the blocks that we erased */
+ if (!error && (verify_writes ||
+ !test_bit(pba, msb->erased_blocks_bitmap)))
+ error = msb_verify_block(msb, pba, sg, offset);
+
+ if (!error)
+ break;
+
+ if (current_try > 1 || msb_reset(msb, true))
+ break;
+
+ pr_err("write failed, trying to erase the pba %d", pba);
+ error = msb_erase_block(msb, pba);
+ if (error)
+ break;
+
+ current_try++;
+ }
+ return error;
+}
+
+/* Finds a free block for write replacement */
+static u16 msb_get_free_block(struct msb_data *msb, int zone)
+{
+ u16 pos;
+ int pba = zone * MS_BLOCKS_IN_ZONE;
+ int i;
+
+ get_random_bytes(&pos, sizeof(pos));
+
+ if (!msb->free_block_count[zone]) {
+ pr_err("NO free blocks in the zone %d, to use for a write, (media is WORN out) switching to RO mode", zone);
+ msb->read_only = true;
+ return MS_BLOCK_INVALID;
+ }
+
+ pos %= msb->free_block_count[zone];
+
+ dbg_verbose("have %d choices for a free block, selected randomally: %d",
+ msb->free_block_count[zone], pos);
+
+ pba = find_next_zero_bit(msb->used_blocks_bitmap,
+ msb->block_count, pba);
+ for (i = 0; i < pos; ++i)
+ pba = find_next_zero_bit(msb->used_blocks_bitmap,
+ msb->block_count, pba + 1);
+
+ dbg_verbose("result of the free blocks scan: pba %d", pba);
+
+ if (pba == msb->block_count || (msb_get_zone_from_pba(pba)) != zone) {
+ pr_err("BUG: cant get a free block");
+ msb->read_only = true;
+ return MS_BLOCK_INVALID;
+ }
+
+ msb_mark_block_used(msb, pba);
+ return pba;
+}
+
+static int msb_update_block(struct msb_data *msb, u16 lba,
+ struct scatterlist *sg, int offset)
+{
+ u16 pba, new_pba;
+ int error, try;
+
+ pba = msb->lba_to_pba_table[lba];
+ dbg_verbose("start of a block update at lba %d, pba %d", lba, pba);
+
+ if (pba != MS_BLOCK_INVALID) {
+ dbg_verbose("setting the update flag on the block");
+ msb_set_overwrite_flag(msb, pba, 0,
+ 0xFF & ~MEMSTICK_OVERWRITE_UDST);
+ }
+
+ for (try = 0; try < 3; try++) {
+ new_pba = msb_get_free_block(msb,
+ msb_get_zone_from_lba(lba));
+
+ if (new_pba == MS_BLOCK_INVALID) {
+ error = -EIO;
+ goto out;
+ }
+
+ dbg_verbose("block update: writing updated block to the pba %d",
+ new_pba);
+ error = msb_write_block(msb, new_pba, lba, sg, offset);
+ if (error == -EBADMSG) {
+ msb_mark_bad(msb, new_pba);
+ continue;
+ }
+
+ if (error)
+ goto out;
+
+ dbg_verbose("block update: erasing the old block");
+ msb_erase_block(msb, pba);
+ msb->lba_to_pba_table[lba] = new_pba;
+ return 0;
+ }
+out:
+ if (error) {
+ pr_err("block update error after %d tries, switching to r/o mode", try);
+ msb->read_only = true;
+ }
+ return error;
+}
+
+/* Converts endiannes in the boot block for easy use */
+static void msb_fix_boot_page_endianness(struct ms_boot_page *p)
+{
+ p->header.block_id = be16_to_cpu(p->header.block_id);
+ p->header.format_reserved = be16_to_cpu(p->header.format_reserved);
+ p->entry.disabled_block.start_addr
+ = be32_to_cpu(p->entry.disabled_block.start_addr);
+ p->entry.disabled_block.data_size
+ = be32_to_cpu(p->entry.disabled_block.data_size);
+ p->entry.cis_idi.start_addr
+ = be32_to_cpu(p->entry.cis_idi.start_addr);
+ p->entry.cis_idi.data_size
+ = be32_to_cpu(p->entry.cis_idi.data_size);
+ p->attr.block_size = be16_to_cpu(p->attr.block_size);
+ p->attr.number_of_blocks = be16_to_cpu(p->attr.number_of_blocks);
+ p->attr.number_of_effective_blocks
+ = be16_to_cpu(p->attr.number_of_effective_blocks);
+ p->attr.page_size = be16_to_cpu(p->attr.page_size);
+ p->attr.memory_manufacturer_code
+ = be16_to_cpu(p->attr.memory_manufacturer_code);
+ p->attr.memory_device_code = be16_to_cpu(p->attr.memory_device_code);
+ p->attr.implemented_capacity
+ = be16_to_cpu(p->attr.implemented_capacity);
+ p->attr.controller_number = be16_to_cpu(p->attr.controller_number);
+ p->attr.controller_function = be16_to_cpu(p->attr.controller_function);
+}
+
+static int msb_read_boot_blocks(struct msb_data *msb)
+{
+ int pba = 0;
+ struct scatterlist sg;
+ struct ms_extra_data_register extra;
+ struct ms_boot_page *page;
+
+ msb->boot_block_locations[0] = MS_BLOCK_INVALID;
+ msb->boot_block_locations[1] = MS_BLOCK_INVALID;
+ msb->boot_block_count = 0;
+
+ dbg_verbose("Start of a scan for the boot blocks");
+
+ if (!msb->boot_page) {
+ page = kmalloc(sizeof(struct ms_boot_page)*2, GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ msb->boot_page = page;
+ } else
+ page = msb->boot_page;
+
+ msb->block_count = MS_BLOCK_MAX_BOOT_ADDR;
+
+ for (pba = 0; pba < MS_BLOCK_MAX_BOOT_ADDR; pba++) {
+
+ sg_init_one(&sg, page, sizeof(*page));
+ if (msb_read_page(msb, pba, 0, &extra, &sg, 0)) {
+ dbg("boot scan: can't read pba %d", pba);
+ continue;
+ }
+
+ if (extra.management_flag & MEMSTICK_MANAGEMENT_SYSFLG) {
+ dbg("managment flag doesn't indicate boot block %d",
+ pba);
+ continue;
+ }
+
+ if (be16_to_cpu(page->header.block_id) != MS_BLOCK_BOOT_ID) {
+ dbg("the pba at %d doesn' contain boot block ID", pba);
+ continue;
+ }
+
+ msb_fix_boot_page_endianness(page);
+ msb->boot_block_locations[msb->boot_block_count] = pba;
+
+ page++;
+ msb->boot_block_count++;
+
+ if (msb->boot_block_count == 2)
+ break;
+ }
+
+ if (!msb->boot_block_count) {
+ pr_err("media doesn't contain master page, aborting");
+ return -EIO;
+ }
+
+ dbg_verbose("End of scan for boot blocks");
+ return 0;
+}
+
+static int msb_read_bad_block_table(struct msb_data *msb, int block_nr)
+{
+ struct ms_boot_page *boot_block;
+ struct scatterlist sg;
+ u16 *buffer = NULL;
+ int offset = 0;
+ int i, error = 0;
+ int data_size, data_offset, page, page_offset, size_to_read;
+ u16 pba;
+
+ BUG_ON(block_nr > 1);
+ boot_block = &msb->boot_page[block_nr];
+ pba = msb->boot_block_locations[block_nr];
+
+ if (msb->boot_block_locations[block_nr] == MS_BLOCK_INVALID)
+ return -EINVAL;
+
+ data_size = boot_block->entry.disabled_block.data_size;
+ data_offset = sizeof(struct ms_boot_page) +
+ boot_block->entry.disabled_block.start_addr;
+ if (!data_size)
+ return 0;
+
+ page = data_offset / msb->page_size;
+ page_offset = data_offset % msb->page_size;
+ size_to_read =
+ DIV_ROUND_UP(data_size + page_offset, msb->page_size) *
+ msb->page_size;
+
+ dbg("reading bad block of boot block at pba %d, offset %d len %d",
+ pba, data_offset, data_size);
+
+ buffer = kzalloc(size_to_read, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ /* Read the buffer */
+ sg_init_one(&sg, buffer, size_to_read);
+
+ while (offset < size_to_read) {
+ error = msb_read_page(msb, pba, page, NULL, &sg, offset);
+ if (error)
+ goto out;
+
+ page++;
+ offset += msb->page_size;
+
+ if (page == msb->pages_in_block) {
+ pr_err(
+ "bad block table extends beyond the boot block");
+ break;
+ }
+ }
+
+ /* Process the bad block table */
+ for (i = page_offset; i < data_size / sizeof(u16); i++) {
+
+ u16 bad_block = be16_to_cpu(buffer[i]);
+
+ if (bad_block >= msb->block_count) {
+ dbg("bad block table contains invalid block %d",
+ bad_block);
+ continue;
+ }
+
+ if (test_bit(bad_block, msb->used_blocks_bitmap)) {
+ dbg("duplicate bad block %d in the table",
+ bad_block);
+ continue;
+ }
+
+ dbg("block %d is marked as factory bad", bad_block);
+ msb_mark_block_used(msb, bad_block);
+ }
+out:
+ kfree(buffer);
+ return error;
+}
+
+static int msb_ftl_initialize(struct msb_data *msb)
+{
+ int i;
+
+ if (msb->ftl_initialized)
+ return 0;
+
+ msb->zone_count = msb->block_count / MS_BLOCKS_IN_ZONE;
+ msb->logical_block_count = msb->zone_count * 496 - 2;
+
+ msb->used_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
+ msb->erased_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
+ msb->lba_to_pba_table =
+ kmalloc(msb->logical_block_count * sizeof(u16), GFP_KERNEL);
+
+ if (!msb->used_blocks_bitmap || !msb->lba_to_pba_table ||
+ !msb->erased_blocks_bitmap) {
+ kfree(msb->used_blocks_bitmap);
+ kfree(msb->lba_to_pba_table);
+ kfree(msb->erased_blocks_bitmap);
+ return -ENOMEM;
+ }
+
+ for (i = 0; i < msb->zone_count; i++)
+ msb->free_block_count[i] = MS_BLOCKS_IN_ZONE;
+
+ memset(msb->lba_to_pba_table, MS_BLOCK_INVALID,
+ msb->logical_block_count * sizeof(u16));
+
+ dbg("initial FTL tables created. Zone count = %d, Logical block count = %d",
+ msb->zone_count, msb->logical_block_count);
+
+ msb->ftl_initialized = true;
+ return 0;
+}
+
+static int msb_ftl_scan(struct msb_data *msb)
+{
+ u16 pba, lba, other_block;
+ u8 overwrite_flag, managment_flag, other_overwrite_flag;
+ int error;
+ struct ms_extra_data_register extra;
+ u8 *overwrite_flags = kzalloc(msb->block_count, GFP_KERNEL);
+
+ if (!overwrite_flags)
+ return -ENOMEM;
+
+ dbg("Start of media scanning");
+ for (pba = 0; pba < msb->block_count; pba++) {
+
+ if (pba == msb->boot_block_locations[0] ||
+ pba == msb->boot_block_locations[1]) {
+ dbg_verbose("pba %05d -> [boot block]", pba);
+ msb_mark_block_used(msb, pba);
+ continue;
+ }
+
+ if (test_bit(pba, msb->used_blocks_bitmap)) {
+ dbg_verbose("pba %05d -> [factory bad]", pba);
+ continue;
+ }
+
+ memset(&extra, 0, sizeof(extra));
+ error = msb_read_oob(msb, pba, 0, &extra);
+
+ /* can't trust the page if we can't read the oob */
+ if (error == -EBADMSG) {
+ pr_notice(
+ "oob of pba %d damaged, will try to erase it", pba);
+ msb_mark_block_used(msb, pba);
+ msb_erase_block(msb, pba);
+ continue;
+ } else if (error) {
+ pr_err("unknown error %d on read of oob of pba %d - aborting",
+ error, pba);
+
+ kfree(overwrite_flags);
+ return error;
+ }
+
+ lba = be16_to_cpu(extra.logical_address);
+ managment_flag = extra.management_flag;
+ overwrite_flag = extra.overwrite_flag;
+ overwrite_flags[pba] = overwrite_flag;
+
+ /* Skip bad blocks */
+ if (!(overwrite_flag & MEMSTICK_OVERWRITE_BKST)) {
+ dbg("pba %05d -> [BAD]", pba);
+ msb_mark_block_used(msb, pba);
+ continue;
+ }
+
+ /* Skip system/drm blocks */
+ if ((managment_flag & MEMSTICK_MANAGMENT_FLAG_NORMAL) !=
+ MEMSTICK_MANAGMENT_FLAG_NORMAL) {
+ dbg("pba %05d -> [reserved managment flag %02x]",
+ pba, managment_flag);
+ msb_mark_block_used(msb, pba);
+ continue;
+ }
+
+ /* Erase temporary tables */
+ if (!(managment_flag & MEMSTICK_MANAGEMENT_ATFLG)) {
+ dbg("pba %05d -> [temp table] - will erase", pba);
+
+ msb_mark_block_used(msb, pba);
+ msb_erase_block(msb, pba);
+ continue;
+ }
+
+ if (lba == MS_BLOCK_INVALID) {
+ dbg_verbose("pba %05d -> [free]", pba);
+ continue;
+ }
+
+ msb_mark_block_used(msb, pba);
+
+ /* Block has LBA not according to zoning*/
+ if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) {
+ pr_notice("pba %05d -> [bad lba %05d] - will erase",
+ pba, lba);
+ msb_erase_block(msb, pba);
+ continue;
+ }
+
+ /* No collisions - great */
+ if (msb->lba_to_pba_table[lba] == MS_BLOCK_INVALID) {
+ dbg_verbose("pba %05d -> [lba %05d]", pba, lba);
+ msb->lba_to_pba_table[lba] = pba;
+ continue;
+ }
+
+ other_block = msb->lba_to_pba_table[lba];
+ other_overwrite_flag = overwrite_flags[other_block];
+
+ pr_notice("Collision between pba %d and pba %d",
+ pba, other_block);
+
+ if (!(overwrite_flag & MEMSTICK_OVERWRITE_UDST)) {
+ pr_notice("pba %d is marked as stable, use it", pba);
+ msb_erase_block(msb, other_block);
+ msb->lba_to_pba_table[lba] = pba;
+ continue;
+ }
+
+ if (!(other_overwrite_flag & MEMSTICK_OVERWRITE_UDST)) {
+ pr_notice("pba %d is marked as stable, use it",
+ other_block);
+ msb_erase_block(msb, pba);
+ continue;
+ }
+
+ pr_notice("collision between blocks %d and %d, without stable flag set on both, erasing pba %d",
+ pba, other_block, other_block);
+
+ msb_erase_block(msb, other_block);
+ msb->lba_to_pba_table[lba] = pba;
+ }
+
+ dbg("End of media scanning");
+ kfree(overwrite_flags);
+ return 0;
+}
+
+static void msb_cache_flush_timer(unsigned long data)
+{
+ struct msb_data *msb = (struct msb_data *)data;
+ msb->need_flush_cache = true;
+ queue_work(msb->io_queue, &msb->io_work);
+}
+
+
+static void msb_cache_discard(struct msb_data *msb)
+{
+ if (msb->cache_block_lba == MS_BLOCK_INVALID)
+ return;
+
+ del_timer_sync(&msb->cache_flush_timer);
+
+ dbg_verbose("Discarding the write cache");
+ msb->cache_block_lba = MS_BLOCK_INVALID;
+ bitmap_zero(&msb->valid_cache_bitmap, msb->pages_in_block);
+}
+
+static int msb_cache_init(struct msb_data *msb)
+{
+ setup_timer(&msb->cache_flush_timer, msb_cache_flush_timer,
+ (unsigned long)msb);
+
+ if (!msb->cache)
+ msb->cache = kzalloc(msb->block_size, GFP_KERNEL);
+ if (!msb->cache)
+ return -ENOMEM;
+
+ msb_cache_discard(msb);
+ return 0;
+}
+
+static int msb_cache_flush(struct msb_data *msb)
+{
+ struct scatterlist sg;
+ struct ms_extra_data_register extra;
+ int page, offset, error;
+ u16 pba, lba;
+
+ if (msb->read_only)
+ return -EROFS;
+
+ if (msb->cache_block_lba == MS_BLOCK_INVALID)
+ return 0;
+
+ lba = msb->cache_block_lba;
+ pba = msb->lba_to_pba_table[lba];
+
+ dbg_verbose("Flushing the write cache of pba %d (LBA %d)",
+ pba, msb->cache_block_lba);
+
+ sg_init_one(&sg, msb->cache , msb->block_size);
+
+ /* Read all missing pages in cache */
+ for (page = 0; page < msb->pages_in_block; page++) {
+
+ if (test_bit(page, &msb->valid_cache_bitmap))
+ continue;
+
+ offset = page * msb->page_size;
+
+ dbg_verbose("reading non-present sector %d of cache block %d",
+ page, lba);
+ error = msb_read_page(msb, pba, page, &extra, &sg, offset);
+
+ /* Bad pages are copied with 00 page status */
+ if (error == -EBADMSG) {
+ pr_err("read error on sector %d, contents probably damaged", page);
+ continue;
+ }
+
+ if (error)
+ return error;
+
+ if ((extra.overwrite_flag & MEMSTICK_OV_PG_NORMAL) !=
+ MEMSTICK_OV_PG_NORMAL) {
+ dbg("page %d is marked as bad", page);
+ continue;
+ }
+
+ set_bit(page, &msb->valid_cache_bitmap);
+ }
+
+ /* Write the cache now */
+ error = msb_update_block(msb, msb->cache_block_lba, &sg, 0);
+ pba = msb->lba_to_pba_table[msb->cache_block_lba];
+
+ /* Mark invalid pages */
+ if (!error) {
+ for (page = 0; page < msb->pages_in_block; page++) {
+
+ if (test_bit(page, &msb->valid_cache_bitmap))
+ continue;
+
+ dbg("marking page %d as containing damaged data",
+ page);
+ msb_set_overwrite_flag(msb,
+ pba , page, 0xFF & ~MEMSTICK_OV_PG_NORMAL);
+ }
+ }
+
+ msb_cache_discard(msb);
+ return error;
+}
+
+static int msb_cache_write(struct msb_data *msb, int lba,
+ int page, bool add_to_cache_only, struct scatterlist *sg, int offset)
+{
+ int error;
+ struct scatterlist sg_tmp[10];
+
+ if (msb->read_only)
+ return -EROFS;
+
+ if (msb->cache_block_lba == MS_BLOCK_INVALID ||
+ lba != msb->cache_block_lba)
+ if (add_to_cache_only)
+ return 0;
+
+ /* If we need to write different block */
+ if (msb->cache_block_lba != MS_BLOCK_INVALID &&
+ lba != msb->cache_block_lba) {
+ dbg_verbose("first flush the cache");
+ error = msb_cache_flush(msb);
+ if (error)
+ return error;
+ }
+
+ if (msb->cache_block_lba == MS_BLOCK_INVALID) {
+ msb->cache_block_lba = lba;
+ mod_timer(&msb->cache_flush_timer,
+ jiffies + msecs_to_jiffies(cache_flush_timeout));
+ }
+
+ dbg_verbose("Write of LBA %d page %d to cache ", lba, page);
+
+ sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp));
+ msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp), offset, msb->page_size);
+
+ sg_copy_to_buffer(sg_tmp, sg_nents(sg_tmp),
+ msb->cache + page * msb->page_size, msb->page_size);
+
+ set_bit(page, &msb->valid_cache_bitmap);
+ return 0;
+}
+
+static int msb_cache_read(struct msb_data *msb, int lba,
+ int page, struct scatterlist *sg, int offset)
+{
+ int pba = msb->lba_to_pba_table[lba];
+ struct scatterlist sg_tmp[10];
+ int error = 0;
+
+ if (lba == msb->cache_block_lba &&
+ test_bit(page, &msb->valid_cache_bitmap)) {
+
+ dbg_verbose("Read of LBA %d (pba %d) sector %d from cache",
+ lba, pba, page);
+
+ sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp));
+ msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp),
+ offset, msb->page_size);
+ sg_copy_from_buffer(sg_tmp, sg_nents(sg_tmp),
+ msb->cache + msb->page_size * page,
+ msb->page_size);
+ } else {
+ dbg_verbose("Read of LBA %d (pba %d) sector %d from device",
+ lba, pba, page);
+
+ error = msb_read_page(msb, pba, page, NULL, sg, offset);
+ if (error)
+ return error;
+
+ msb_cache_write(msb, lba, page, true, sg, offset);
+ }
+ return error;
+}
+
+/* Emulated geometry table
+ * This table content isn't that importaint,
+ * One could put here different values, providing that they still
+ * cover whole disk.
+ * 64 MB entry is what windows reports for my 64M memstick */
+
+static const struct chs_entry chs_table[] = {
+/* size sectors cylynders heads */
+ { 4, 16, 247, 2 },
+ { 8, 16, 495, 2 },
+ { 16, 16, 495, 4 },
+ { 32, 16, 991, 4 },
+ { 64, 16, 991, 8 },
+ {128, 16, 991, 16 },
+ { 0 }
+};
+
+/* Load information about the card */
+static int msb_init_card(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_host *host = card->host;
+ struct ms_boot_page *boot_block;
+ int error = 0, i, raw_size_in_megs;
+
+ msb->caps = 0;
+
+ if (card->id.class >= MEMSTICK_CLASS_ROM &&
+ card->id.class <= MEMSTICK_CLASS_ROM)
+ msb->read_only = true;
+
+ msb->state = -1;
+ error = msb_reset(msb, false);
+ if (error)
+ return error;
+
+ /* Due to a bug in Jmicron driver written by Alex Dubov,
+ its serial mode barely works,
+ so we switch to parallel mode right away */
+ if (host->caps & MEMSTICK_CAP_PAR4)
+ msb_switch_to_parallel(msb);
+
+ msb->page_size = sizeof(struct ms_boot_page);
+
+ /* Read the boot page */
+ error = msb_read_boot_blocks(msb);
+ if (error)
+ return -EIO;
+
+ boot_block = &msb->boot_page[0];
+
+ /* Save intersting attributes from boot page */
+ msb->block_count = boot_block->attr.number_of_blocks;
+ msb->page_size = boot_block->attr.page_size;
+
+ msb->pages_in_block = boot_block->attr.block_size * 2;
+ msb->block_size = msb->page_size * msb->pages_in_block;
+
+ if (msb->page_size > PAGE_SIZE) {
+ /* this isn't supported by linux at all, anyway*/
+ dbg("device page %d size isn't supported", msb->page_size);
+ return -EINVAL;
+ }
+
+ msb->block_buffer = kzalloc(msb->block_size, GFP_KERNEL);
+ if (!msb->block_buffer)
+ return -ENOMEM;
+
+ raw_size_in_megs = (msb->block_size * msb->block_count) >> 20;
+
+ for (i = 0; chs_table[i].size; i++) {
+
+ if (chs_table[i].size != raw_size_in_megs)
+ continue;
+
+ msb->geometry.cylinders = chs_table[i].cyl;
+ msb->geometry.heads = chs_table[i].head;
+ msb->geometry.sectors = chs_table[i].sec;
+ break;
+ }
+
+ if (boot_block->attr.transfer_supporting == 1)
+ msb->caps |= MEMSTICK_CAP_PAR4;
+
+ if (boot_block->attr.device_type & 0x03)
+ msb->read_only = true;
+
+ dbg("Total block count = %d", msb->block_count);
+ dbg("Each block consists of %d pages", msb->pages_in_block);
+ dbg("Page size = %d bytes", msb->page_size);
+ dbg("Parallel mode supported: %d", !!(msb->caps & MEMSTICK_CAP_PAR4));
+ dbg("Read only: %d", msb->read_only);
+
+#if 0
+ /* Now we can switch the interface */
+ if (host->caps & msb->caps & MEMSTICK_CAP_PAR4)
+ msb_switch_to_parallel(msb);
+#endif
+
+ error = msb_cache_init(msb);
+ if (error)
+ return error;
+
+ error = msb_ftl_initialize(msb);
+ if (error)
+ return error;
+
+
+ /* Read the bad block table */
+ error = msb_read_bad_block_table(msb, 0);
+
+ if (error && error != -ENOMEM) {
+ dbg("failed to read bad block table from primary boot block, trying from backup");
+ error = msb_read_bad_block_table(msb, 1);
+ }
+
+ if (error)
+ return error;
+
+ /* *drum roll* Scan the media */
+ error = msb_ftl_scan(msb);
+ if (error) {
+ pr_err("Scan of media failed");
+ return error;
+ }
+
+ return 0;
+
+}
+
+static int msb_do_write_request(struct msb_data *msb, int lba,
+ int page, struct scatterlist *sg, size_t len, int *sucessfuly_written)
+{
+ int error = 0;
+ off_t offset = 0;
+ *sucessfuly_written = 0;
+
+ while (offset < len) {
+ if (page == 0 && len - offset >= msb->block_size) {
+
+ if (msb->cache_block_lba == lba)
+ msb_cache_discard(msb);
+
+ dbg_verbose("Writing whole lba %d", lba);
+ error = msb_update_block(msb, lba, sg, offset);
+ if (error)
+ return error;
+
+ offset += msb->block_size;
+ *sucessfuly_written += msb->block_size;
+ lba++;
+ continue;
+ }
+
+ error = msb_cache_write(msb, lba, page, false, sg, offset);
+ if (error)
+ return error;
+
+ offset += msb->page_size;
+ *sucessfuly_written += msb->page_size;
+
+ page++;
+ if (page == msb->pages_in_block) {
+ page = 0;
+ lba++;
+ }
+ }
+ return 0;
+}
+
+static int msb_do_read_request(struct msb_data *msb, int lba,
+ int page, struct scatterlist *sg, int len, int *sucessfuly_read)
+{
+ int error = 0;
+ int offset = 0;
+ *sucessfuly_read = 0;
+
+ while (offset < len) {
+
+ error = msb_cache_read(msb, lba, page, sg, offset);
+ if (error)
+ return error;
+
+ offset += msb->page_size;
+ *sucessfuly_read += msb->page_size;
+
+ page++;
+ if (page == msb->pages_in_block) {
+ page = 0;
+ lba++;
+ }
+ }
+ return 0;
+}
+
+static void msb_io_work(struct work_struct *work)
+{
+ struct msb_data *msb = container_of(work, struct msb_data, io_work);
+ int page, error, len;
+ sector_t lba;
+ unsigned long flags;
+ struct scatterlist *sg = msb->prealloc_sg;
+
+ dbg_verbose("IO: work started");
+
+ while (1) {
+ spin_lock_irqsave(&msb->q_lock, flags);
+
+ if (msb->need_flush_cache) {
+ msb->need_flush_cache = false;
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ msb_cache_flush(msb);
+ continue;
+ }
+
+ if (!msb->req) {
+ msb->req = blk_fetch_request(msb->queue);
+ if (!msb->req) {
+ dbg_verbose("IO: no more requests exiting");
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ return;
+ }
+ }
+
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ /* If card was removed meanwhile */
+ if (!msb->req)
+ return;
+
+ /* process the request */
+ dbg_verbose("IO: processing new request");
+ blk_rq_map_sg(msb->queue, msb->req, sg);
+
+ lba = blk_rq_pos(msb->req);
+
+ sector_div(lba, msb->page_size / 512);
+ page = do_div(lba, msb->pages_in_block);
+
+ if (rq_data_dir(msb->req) == READ)
+ error = msb_do_read_request(msb, lba, page, sg,
+ blk_rq_bytes(msb->req), &len);
+ else
+ error = msb_do_write_request(msb, lba, page, sg,
+ blk_rq_bytes(msb->req), &len);
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+
+ if (len)
+ if (!__blk_end_request(msb->req, 0, len))
+ msb->req = NULL;
+
+ if (error && msb->req) {
+ dbg_verbose("IO: ending one sector of the request with error");
+ if (!__blk_end_request(msb->req, error, msb->page_size))
+ msb->req = NULL;
+ }
+
+ if (msb->req)
+ dbg_verbose("IO: request still pending");
+
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ }
+}
+
+static DEFINE_IDR(msb_disk_idr); /*set of used disk numbers */
+static DEFINE_MUTEX(msb_disk_lock); /* protects against races in open/release */
+
+static int msb_bd_open(struct block_device *bdev, fmode_t mode)
+{
+ struct gendisk *disk = bdev->bd_disk;
+ struct msb_data *msb = disk->private_data;
+
+ dbg_verbose("block device open");
+
+ mutex_lock(&msb_disk_lock);
+
+ if (msb && msb->card)
+ msb->usage_count++;
+
+ mutex_unlock(&msb_disk_lock);
+ return 0;
+}
+
+static void msb_data_clear(struct msb_data *msb)
+{
+ kfree(msb->boot_page);
+ kfree(msb->used_blocks_bitmap);
+ kfree(msb->lba_to_pba_table);
+ kfree(msb->cache);
+ msb->card = NULL;
+}
+
+static int msb_disk_release(struct gendisk *disk)
+{
+ struct msb_data *msb = disk->private_data;
+
+ dbg_verbose("block device release");
+ mutex_lock(&msb_disk_lock);
+
+ if (msb) {
+ if (msb->usage_count)
+ msb->usage_count--;
+
+ if (!msb->usage_count) {
+ disk->private_data = NULL;
+ idr_remove(&msb_disk_idr, msb->disk_id);
+ put_disk(disk);
+ kfree(msb);
+ }
+ }
+ mutex_unlock(&msb_disk_lock);
+ return 0;
+}
+
+static void msb_bd_release(struct gendisk *disk, fmode_t mode)
+{
+ msb_disk_release(disk);
+}
+
+static int msb_bd_getgeo(struct block_device *bdev,
+ struct hd_geometry *geo)
+{
+ struct msb_data *msb = bdev->bd_disk->private_data;
+ *geo = msb->geometry;
+ return 0;
+}
+
+static int msb_prepare_req(struct request_queue *q, struct request *req)
+{
+ if (req->cmd_type != REQ_TYPE_FS &&
+ req->cmd_type != REQ_TYPE_BLOCK_PC) {
+ blk_dump_rq_flags(req, "MS unsupported request");
+ return BLKPREP_KILL;
+ }
+ req->cmd_flags |= REQ_DONTPREP;
+ return BLKPREP_OK;
+}
+
+static void msb_submit_req(struct request_queue *q)
+{
+ struct memstick_dev *card = q->queuedata;
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct request *req = NULL;
+
+ dbg_verbose("Submit request");
+
+ if (msb->card_dead) {
+ dbg("Refusing requests on removed card");
+
+ WARN_ON(!msb->io_queue_stopped);
+
+ while ((req = blk_fetch_request(q)) != NULL)
+ __blk_end_request_all(req, -ENODEV);
+ return;
+ }
+
+ if (msb->req)
+ return;
+
+ if (!msb->io_queue_stopped)
+ queue_work(msb->io_queue, &msb->io_work);
+}
+
+static int msb_check_card(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ return (msb->card_dead == 0);
+}
+
+static void msb_stop(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+
+ dbg("Stopping all msblock IO");
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ blk_stop_queue(msb->queue);
+ msb->io_queue_stopped = true;
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ del_timer_sync(&msb->cache_flush_timer);
+ flush_workqueue(msb->io_queue);
+
+ if (msb->req) {
+ spin_lock_irqsave(&msb->q_lock, flags);
+ blk_requeue_request(msb->queue, msb->req);
+ msb->req = NULL;
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ }
+
+}
+
+static void msb_start(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+
+ dbg("Resuming IO from msblock");
+
+ msb_invalidate_reg_window(msb);
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ if (!msb->io_queue_stopped || msb->card_dead) {
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ /* Kick cache flush anyway, its harmless */
+ msb->need_flush_cache = true;
+ msb->io_queue_stopped = false;
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ blk_start_queue(msb->queue);
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ queue_work(msb->io_queue, &msb->io_work);
+
+}
+
+static const struct block_device_operations msb_bdops = {
+ .open = msb_bd_open,
+ .release = msb_bd_release,
+ .getgeo = msb_bd_getgeo,
+ .owner = THIS_MODULE
+};
+
+/* Registers the block device */
+static int msb_init_disk(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct memstick_host *host = card->host;
+ int rc;
+ u64 limit = BLK_BOUNCE_HIGH;
+ unsigned long capacity;
+
+ if (host->dev.dma_mask && *(host->dev.dma_mask))
+ limit = *(host->dev.dma_mask);
+
+ mutex_lock(&msb_disk_lock);
+ msb->disk_id = idr_alloc(&msb_disk_idr, card, 0, 256, GFP_KERNEL);
+ mutex_unlock(&msb_disk_lock);
+
+ if (msb->disk_id < 0)
+ return msb->disk_id;
+
+ msb->disk = alloc_disk(0);
+ if (!msb->disk) {
+ rc = -ENOMEM;
+ goto out_release_id;
+ }
+
+ msb->queue = blk_init_queue(msb_submit_req, &msb->q_lock);
+ if (!msb->queue) {
+ rc = -ENOMEM;
+ goto out_put_disk;
+ }
+
+ msb->queue->queuedata = card;
+ blk_queue_prep_rq(msb->queue, msb_prepare_req);
+
+ blk_queue_bounce_limit(msb->queue, limit);
+ blk_queue_max_hw_sectors(msb->queue, MS_BLOCK_MAX_PAGES);
+ blk_queue_max_segments(msb->queue, MS_BLOCK_MAX_SEGS);
+ blk_queue_max_segment_size(msb->queue,
+ MS_BLOCK_MAX_PAGES * msb->page_size);
+ blk_queue_logical_block_size(msb->queue, msb->page_size);
+
+ sprintf(msb->disk->disk_name, "msblk%d", msb->disk_id);
+ msb->disk->fops = &msb_bdops;
+ msb->disk->private_data = msb;
+ msb->disk->queue = msb->queue;
+ msb->disk->driverfs_dev = &card->dev;
+ msb->disk->flags |= GENHD_FL_EXT_DEVT;
+
+ capacity = msb->pages_in_block * msb->logical_block_count;
+ capacity *= (msb->page_size / 512);
+ set_capacity(msb->disk, capacity);
+ dbg("Set total disk size to %lu sectors", capacity);
+
+ msb->usage_count = 1;
+ msb->io_queue = alloc_ordered_workqueue("ms_block", WQ_MEM_RECLAIM);
+ INIT_WORK(&msb->io_work, msb_io_work);
+ sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
+
+ if (msb->read_only)
+ set_disk_ro(msb->disk, 1);
+
+ msb_start(card);
+ add_disk(msb->disk);
+ dbg("Disk added");
+ return 0;
+
+out_put_disk:
+ put_disk(msb->disk);
+out_release_id:
+ mutex_lock(&msb_disk_lock);
+ idr_remove(&msb_disk_idr, msb->disk_id);
+ mutex_unlock(&msb_disk_lock);
+ return rc;
+}
+
+static int msb_probe(struct memstick_dev *card)
+{
+ struct msb_data *msb;
+ int rc = 0;
+
+ msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL);
+ if (!msb)
+ return -ENOMEM;
+ memstick_set_drvdata(card, msb);
+ msb->card = card;
+ spin_lock_init(&msb->q_lock);
+
+ rc = msb_init_card(card);
+ if (rc)
+ goto out_free;
+
+ rc = msb_init_disk(card);
+ if (!rc) {
+ card->check = msb_check_card;
+ card->stop = msb_stop;
+ card->start = msb_start;
+ return 0;
+ }
+out_free:
+ memstick_set_drvdata(card, NULL);
+ msb_data_clear(msb);
+ kfree(msb);
+ return rc;
+}
+
+static void msb_remove(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+
+ if (!msb->io_queue_stopped)
+ msb_stop(card);
+
+ dbg("Removing the disk device");
+
+ /* Take care of unhandled + new requests from now on */
+ spin_lock_irqsave(&msb->q_lock, flags);
+ msb->card_dead = true;
+ blk_start_queue(msb->queue);
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ /* Remove the disk */
+ del_gendisk(msb->disk);
+ blk_cleanup_queue(msb->queue);
+ msb->queue = NULL;
+
+ mutex_lock(&msb_disk_lock);
+ msb_data_clear(msb);
+ mutex_unlock(&msb_disk_lock);
+
+ msb_disk_release(msb->disk);
+ memstick_set_drvdata(card, NULL);
+}
+
+#ifdef CONFIG_PM
+
+static int msb_suspend(struct memstick_dev *card, pm_message_t state)
+{
+ msb_stop(card);
+ return 0;
+}
+
+static int msb_resume(struct memstick_dev *card)
+{
+ struct msb_data *msb = memstick_get_drvdata(card);
+ struct msb_data *new_msb = NULL;
+ bool card_dead = true;
+
+#ifndef CONFIG_MEMSTICK_UNSAFE_RESUME
+ msb->card_dead = true;
+ return 0;
+#endif
+ mutex_lock(&card->host->lock);
+
+ new_msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL);
+ if (!new_msb)
+ goto out;
+
+ new_msb->card = card;
+ memstick_set_drvdata(card, new_msb);
+ spin_lock_init(&new_msb->q_lock);
+ sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
+
+ if (msb_init_card(card))
+ goto out;
+
+ if (msb->block_size != new_msb->block_size)
+ goto out;
+
+ if (memcmp(msb->boot_page, new_msb->boot_page,
+ sizeof(struct ms_boot_page)))
+ goto out;
+
+ if (msb->logical_block_count != new_msb->logical_block_count ||
+ memcmp(msb->lba_to_pba_table, new_msb->lba_to_pba_table,
+ msb->logical_block_count))
+ goto out;
+
+ if (msb->block_count != new_msb->block_count ||
+ memcmp(msb->used_blocks_bitmap, new_msb->used_blocks_bitmap,
+ msb->block_count / 8))
+ goto out;
+
+ card_dead = false;
+out:
+ if (card_dead)
+ dbg("Card was removed/replaced during suspend");
+
+ msb->card_dead = card_dead;
+ memstick_set_drvdata(card, msb);
+
+ if (new_msb) {
+ msb_data_clear(new_msb);
+ kfree(new_msb);
+ }
+
+ msb_start(card);
+ mutex_unlock(&card->host->lock);
+ return 0;
+}
+#else
+
+#define msb_suspend NULL
+#define msb_resume NULL
+
+#endif /* CONFIG_PM */
+
+static struct memstick_device_id msb_id_tbl[] = {
+ {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
+ MEMSTICK_CLASS_FLASH},
+
+ {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
+ MEMSTICK_CLASS_ROM},
+
+ {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
+ MEMSTICK_CLASS_RO},
+
+ {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
+ MEMSTICK_CLASS_WP},
+
+ {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_DUO, MEMSTICK_CATEGORY_STORAGE_DUO,
+ MEMSTICK_CLASS_DUO},
+ {}
+};
+MODULE_DEVICE_TABLE(memstick, msb_id_tbl);
+
+
+static struct memstick_driver msb_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE
+ },
+ .id_table = msb_id_tbl,
+ .probe = msb_probe,
+ .remove = msb_remove,
+ .suspend = msb_suspend,
+ .resume = msb_resume
+};
+
+static int major;
+
+static int __init msb_init(void)
+{
+ int rc = register_blkdev(0, DRIVER_NAME);
+
+ if (rc < 0) {
+ pr_err("failed to register major (error %d)\n", rc);
+ return rc;
+ }
+
+ major = rc;
+ rc = memstick_register_driver(&msb_driver);
+ if (rc) {
+ unregister_blkdev(major, DRIVER_NAME);
+ pr_err("failed to register memstick driver (error %d)\n", rc);
+ }
+
+ return rc;
+}
+
+static void __exit msb_exit(void)
+{
+ memstick_unregister_driver(&msb_driver);
+ unregister_blkdev(major, DRIVER_NAME);
+ idr_destroy(&msb_disk_idr);
+}
+
+module_init(msb_init);
+module_exit(msb_exit);
+
+module_param(cache_flush_timeout, int, S_IRUGO);
+MODULE_PARM_DESC(cache_flush_timeout,
+ "Cache flush timeout in msec (1000 default)");
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug level (0-2)");
+
+module_param(verify_writes, bool, S_IRUGO);
+MODULE_PARM_DESC(verify_writes, "Read back and check all data that is written");
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Maxim Levitsky");
+MODULE_DESCRIPTION("Sony MemoryStick block device driver");
diff --git a/kernel/drivers/memstick/core/ms_block.h b/kernel/drivers/memstick/core/ms_block.h
new file mode 100644
index 000000000..c75198dbf
--- /dev/null
+++ b/kernel/drivers/memstick/core/ms_block.h
@@ -0,0 +1,290 @@
+/*
+ * ms_block.h - Sony MemoryStick (legacy) storage support
+
+ * Copyright (C) 2013 Maxim Levitsky <maximlevitsky@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Minor portions of the driver are copied from mspro_block.c which is
+ * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
+ *
+ * Also ms structures were copied from old broken driver by same author
+ * These probably come from MS spec
+ *
+ */
+
+#ifndef MS_BLOCK_NEW_H
+#define MS_BLOCK_NEW_H
+
+#define MS_BLOCK_MAX_SEGS 32
+#define MS_BLOCK_MAX_PAGES ((2 << 16) - 1)
+
+#define MS_BLOCK_MAX_BOOT_ADDR 0x000c
+#define MS_BLOCK_BOOT_ID 0x0001
+#define MS_BLOCK_INVALID 0xffff
+#define MS_MAX_ZONES 16
+#define MS_BLOCKS_IN_ZONE 512
+
+#define MS_BLOCK_MAP_LINE_SZ 16
+#define MS_BLOCK_PART_SHIFT 3
+
+
+#define MEMSTICK_UNCORR_ERROR (MEMSTICK_STATUS1_UCFG | \
+ MEMSTICK_STATUS1_UCEX | MEMSTICK_STATUS1_UCDT)
+
+#define MEMSTICK_CORR_ERROR (MEMSTICK_STATUS1_FGER | MEMSTICK_STATUS1_EXER | \
+ MEMSTICK_STATUS1_DTER)
+
+#define MEMSTICK_INT_ERROR (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)
+
+#define MEMSTICK_OVERWRITE_FLAG_NORMAL \
+ (MEMSTICK_OVERWRITE_PGST1 | \
+ MEMSTICK_OVERWRITE_PGST0 | \
+ MEMSTICK_OVERWRITE_BKST)
+
+#define MEMSTICK_OV_PG_NORMAL \
+ (MEMSTICK_OVERWRITE_PGST1 | MEMSTICK_OVERWRITE_PGST0)
+
+#define MEMSTICK_MANAGMENT_FLAG_NORMAL \
+ (MEMSTICK_MANAGEMENT_SYSFLG | \
+ MEMSTICK_MANAGEMENT_SCMS1 | \
+ MEMSTICK_MANAGEMENT_SCMS0) \
+
+struct ms_boot_header {
+ unsigned short block_id;
+ unsigned short format_reserved;
+ unsigned char reserved0[184];
+ unsigned char data_entry;
+ unsigned char reserved1[179];
+} __packed;
+
+
+struct ms_system_item {
+ unsigned int start_addr;
+ unsigned int data_size;
+ unsigned char data_type_id;
+ unsigned char reserved[3];
+} __packed;
+
+struct ms_system_entry {
+ struct ms_system_item disabled_block;
+ struct ms_system_item cis_idi;
+ unsigned char reserved[24];
+} __packed;
+
+struct ms_boot_attr_info {
+ unsigned char memorystick_class;
+ unsigned char format_unique_value1;
+ unsigned short block_size;
+ unsigned short number_of_blocks;
+ unsigned short number_of_effective_blocks;
+ unsigned short page_size;
+ unsigned char extra_data_size;
+ unsigned char format_unique_value2;
+ unsigned char assembly_time[8];
+ unsigned char format_unique_value3;
+ unsigned char serial_number[3];
+ unsigned char assembly_manufacturer_code;
+ unsigned char assembly_model_code[3];
+ unsigned short memory_manufacturer_code;
+ unsigned short memory_device_code;
+ unsigned short implemented_capacity;
+ unsigned char format_unique_value4[2];
+ unsigned char vcc;
+ unsigned char vpp;
+ unsigned short controller_number;
+ unsigned short controller_function;
+ unsigned char reserved0[9];
+ unsigned char transfer_supporting;
+ unsigned short format_unique_value5;
+ unsigned char format_type;
+ unsigned char memorystick_application;
+ unsigned char device_type;
+ unsigned char reserved1[22];
+ unsigned char format_uniqure_value6[2];
+ unsigned char reserved2[15];
+} __packed;
+
+struct ms_cis_idi {
+ unsigned short general_config;
+ unsigned short logical_cylinders;
+ unsigned short reserved0;
+ unsigned short logical_heads;
+ unsigned short track_size;
+ unsigned short page_size;
+ unsigned short pages_per_track;
+ unsigned short msw;
+ unsigned short lsw;
+ unsigned short reserved1;
+ unsigned char serial_number[20];
+ unsigned short buffer_type;
+ unsigned short buffer_size_increments;
+ unsigned short long_command_ecc;
+ unsigned char firmware_version[28];
+ unsigned char model_name[18];
+ unsigned short reserved2[5];
+ unsigned short pio_mode_number;
+ unsigned short dma_mode_number;
+ unsigned short field_validity;
+ unsigned short current_logical_cylinders;
+ unsigned short current_logical_heads;
+ unsigned short current_pages_per_track;
+ unsigned int current_page_capacity;
+ unsigned short mutiple_page_setting;
+ unsigned int addressable_pages;
+ unsigned short single_word_dma;
+ unsigned short multi_word_dma;
+ unsigned char reserved3[128];
+} __packed;
+
+
+struct ms_boot_page {
+ struct ms_boot_header header;
+ struct ms_system_entry entry;
+ struct ms_boot_attr_info attr;
+} __packed;
+
+struct msb_data {
+ unsigned int usage_count;
+ struct memstick_dev *card;
+ struct gendisk *disk;
+ struct request_queue *queue;
+ spinlock_t q_lock;
+ struct hd_geometry geometry;
+ struct attribute_group attr_group;
+ struct request *req;
+ int caps;
+ int disk_id;
+
+ /* IO */
+ struct workqueue_struct *io_queue;
+ bool io_queue_stopped;
+ struct work_struct io_work;
+ bool card_dead;
+
+ /* Media properties */
+ struct ms_boot_page *boot_page;
+ u16 boot_block_locations[2];
+ int boot_block_count;
+
+ bool read_only;
+ unsigned short page_size;
+ int block_size;
+ int pages_in_block;
+ int zone_count;
+ int block_count;
+ int logical_block_count;
+
+ /* FTL tables */
+ unsigned long *used_blocks_bitmap;
+ unsigned long *erased_blocks_bitmap;
+ u16 *lba_to_pba_table;
+ int free_block_count[MS_MAX_ZONES];
+ bool ftl_initialized;
+
+ /* Cache */
+ unsigned char *cache;
+ unsigned long valid_cache_bitmap;
+ int cache_block_lba;
+ bool need_flush_cache;
+ struct timer_list cache_flush_timer;
+
+ /* Preallocated buffers */
+ unsigned char *block_buffer;
+ struct scatterlist prealloc_sg[MS_BLOCK_MAX_SEGS+1];
+
+
+ /* handler's local data */
+ struct ms_register_addr reg_addr;
+ bool addr_valid;
+
+ u8 command_value;
+ bool command_need_oob;
+ struct scatterlist *current_sg;
+ int current_sg_offset;
+
+ struct ms_register regs;
+ int current_page;
+
+ int state;
+ int exit_error;
+ bool int_polling;
+ unsigned long int_timeout;
+
+};
+
+enum msb_readpage_states {
+ MSB_RP_SEND_BLOCK_ADDRESS = 0,
+ MSB_RP_SEND_READ_COMMAND,
+
+ MSB_RP_SEND_INT_REQ,
+ MSB_RP_RECEIVE_INT_REQ_RESULT,
+
+ MSB_RP_SEND_READ_STATUS_REG,
+ MSB_RP_RECEIVE_STATUS_REG,
+
+ MSB_RP_SEND_OOB_READ,
+ MSB_RP_RECEIVE_OOB_READ,
+
+ MSB_RP_SEND_READ_DATA,
+ MSB_RP_RECEIVE_READ_DATA,
+};
+
+enum msb_write_block_states {
+ MSB_WB_SEND_WRITE_PARAMS = 0,
+ MSB_WB_SEND_WRITE_OOB,
+ MSB_WB_SEND_WRITE_COMMAND,
+
+ MSB_WB_SEND_INT_REQ,
+ MSB_WB_RECEIVE_INT_REQ,
+
+ MSB_WB_SEND_WRITE_DATA,
+ MSB_WB_RECEIVE_WRITE_CONFIRMATION,
+};
+
+enum msb_send_command_states {
+ MSB_SC_SEND_WRITE_PARAMS,
+ MSB_SC_SEND_WRITE_OOB,
+ MSB_SC_SEND_COMMAND,
+
+ MSB_SC_SEND_INT_REQ,
+ MSB_SC_RECEIVE_INT_REQ,
+
+};
+
+enum msb_reset_states {
+ MSB_RS_SEND,
+ MSB_RS_CONFIRM,
+};
+
+enum msb_par_switch_states {
+ MSB_PS_SEND_SWITCH_COMMAND,
+ MSB_PS_SWICH_HOST,
+ MSB_PS_CONFIRM,
+};
+
+struct chs_entry {
+ unsigned long size;
+ unsigned char sec;
+ unsigned short cyl;
+ unsigned char head;
+};
+
+static int msb_reset(struct msb_data *msb, bool full);
+
+static int h_msb_default_bad(struct memstick_dev *card,
+ struct memstick_request **mrq);
+
+#define __dbg(level, format, ...) \
+ do { \
+ if (debug >= level) \
+ pr_err(format "\n", ## __VA_ARGS__); \
+ } while (0)
+
+
+#define dbg(format, ...) __dbg(1, format, ## __VA_ARGS__)
+#define dbg_verbose(format, ...) __dbg(2, format, ## __VA_ARGS__)
+
+#endif
diff --git a/kernel/drivers/memstick/core/mspro_block.c b/kernel/drivers/memstick/core/mspro_block.c
new file mode 100644
index 000000000..922a75064
--- /dev/null
+++ b/kernel/drivers/memstick/core/mspro_block.c
@@ -0,0 +1,1488 @@
+/*
+ * Sony MemoryStick Pro storage support
+ *
+ * Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Special thanks to Carlos Corbacho for providing various MemoryStick cards
+ * that made this driver possible.
+ *
+ */
+
+#include <linux/blkdev.h>
+#include <linux/idr.h>
+#include <linux/hdreg.h>
+#include <linux/kthread.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/memstick.h>
+#include <linux/module.h>
+
+#define DRIVER_NAME "mspro_block"
+
+static int major;
+module_param(major, int, 0644);
+
+#define MSPRO_BLOCK_MAX_SEGS 32
+#define MSPRO_BLOCK_MAX_PAGES ((2 << 16) - 1)
+
+#define MSPRO_BLOCK_SIGNATURE 0xa5c3
+#define MSPRO_BLOCK_MAX_ATTRIBUTES 41
+
+#define MSPRO_BLOCK_PART_SHIFT 3
+
+enum {
+ MSPRO_BLOCK_ID_SYSINFO = 0x10,
+ MSPRO_BLOCK_ID_MODELNAME = 0x15,
+ MSPRO_BLOCK_ID_MBR = 0x20,
+ MSPRO_BLOCK_ID_PBR16 = 0x21,
+ MSPRO_BLOCK_ID_PBR32 = 0x22,
+ MSPRO_BLOCK_ID_SPECFILEVALUES1 = 0x25,
+ MSPRO_BLOCK_ID_SPECFILEVALUES2 = 0x26,
+ MSPRO_BLOCK_ID_DEVINFO = 0x30
+};
+
+struct mspro_sys_attr {
+ size_t size;
+ void *data;
+ unsigned char id;
+ char name[32];
+ struct device_attribute dev_attr;
+};
+
+struct mspro_attr_entry {
+ __be32 address;
+ __be32 size;
+ unsigned char id;
+ unsigned char reserved[3];
+} __attribute__((packed));
+
+struct mspro_attribute {
+ __be16 signature;
+ unsigned short version;
+ unsigned char count;
+ unsigned char reserved[11];
+ struct mspro_attr_entry entries[];
+} __attribute__((packed));
+
+struct mspro_sys_info {
+ unsigned char class;
+ unsigned char reserved0;
+ __be16 block_size;
+ __be16 block_count;
+ __be16 user_block_count;
+ __be16 page_size;
+ unsigned char reserved1[2];
+ unsigned char assembly_date[8];
+ __be32 serial_number;
+ unsigned char assembly_maker_code;
+ unsigned char assembly_model_code[3];
+ __be16 memory_maker_code;
+ __be16 memory_model_code;
+ unsigned char reserved2[4];
+ unsigned char vcc;
+ unsigned char vpp;
+ __be16 controller_number;
+ __be16 controller_function;
+ __be16 start_sector;
+ __be16 unit_size;
+ unsigned char ms_sub_class;
+ unsigned char reserved3[4];
+ unsigned char interface_type;
+ __be16 controller_code;
+ unsigned char format_type;
+ unsigned char reserved4;
+ unsigned char device_type;
+ unsigned char reserved5[7];
+ unsigned char mspro_id[16];
+ unsigned char reserved6[16];
+} __attribute__((packed));
+
+struct mspro_mbr {
+ unsigned char boot_partition;
+ unsigned char start_head;
+ unsigned char start_sector;
+ unsigned char start_cylinder;
+ unsigned char partition_type;
+ unsigned char end_head;
+ unsigned char end_sector;
+ unsigned char end_cylinder;
+ unsigned int start_sectors;
+ unsigned int sectors_per_partition;
+} __attribute__((packed));
+
+struct mspro_specfile {
+ char name[8];
+ char ext[3];
+ unsigned char attr;
+ unsigned char reserved[10];
+ unsigned short time;
+ unsigned short date;
+ unsigned short cluster;
+ unsigned int size;
+} __attribute__((packed));
+
+struct mspro_devinfo {
+ __be16 cylinders;
+ __be16 heads;
+ __be16 bytes_per_track;
+ __be16 bytes_per_sector;
+ __be16 sectors_per_track;
+ unsigned char reserved[6];
+} __attribute__((packed));
+
+struct mspro_block_data {
+ struct memstick_dev *card;
+ unsigned int usage_count;
+ unsigned int caps;
+ struct gendisk *disk;
+ struct request_queue *queue;
+ struct request *block_req;
+ spinlock_t q_lock;
+
+ unsigned short page_size;
+ unsigned short cylinders;
+ unsigned short heads;
+ unsigned short sectors_per_track;
+
+ unsigned char system;
+ unsigned char read_only:1,
+ eject:1,
+ has_request:1,
+ data_dir:1,
+ active:1;
+ unsigned char transfer_cmd;
+
+ int (*mrq_handler)(struct memstick_dev *card,
+ struct memstick_request **mrq);
+
+
+ /* Default request setup function for data access method preferred by
+ * this host instance.
+ */
+ void (*setup_transfer)(struct memstick_dev *card,
+ u64 offset, size_t length);
+
+ struct attribute_group attr_group;
+
+ struct scatterlist req_sg[MSPRO_BLOCK_MAX_SEGS];
+ unsigned int seg_count;
+ unsigned int current_seg;
+ unsigned int current_page;
+};
+
+static DEFINE_IDR(mspro_block_disk_idr);
+static DEFINE_MUTEX(mspro_block_disk_lock);
+
+static int mspro_block_complete_req(struct memstick_dev *card, int error);
+
+/*** Block device ***/
+
+static int mspro_block_bd_open(struct block_device *bdev, fmode_t mode)
+{
+ struct gendisk *disk = bdev->bd_disk;
+ struct mspro_block_data *msb = disk->private_data;
+ int rc = -ENXIO;
+
+ mutex_lock(&mspro_block_disk_lock);
+
+ if (msb && msb->card) {
+ msb->usage_count++;
+ if ((mode & FMODE_WRITE) && msb->read_only)
+ rc = -EROFS;
+ else
+ rc = 0;
+ }
+
+ mutex_unlock(&mspro_block_disk_lock);
+
+ return rc;
+}
+
+
+static void mspro_block_disk_release(struct gendisk *disk)
+{
+ struct mspro_block_data *msb = disk->private_data;
+ int disk_id = MINOR(disk_devt(disk)) >> MSPRO_BLOCK_PART_SHIFT;
+
+ mutex_lock(&mspro_block_disk_lock);
+
+ if (msb) {
+ if (msb->usage_count)
+ msb->usage_count--;
+
+ if (!msb->usage_count) {
+ kfree(msb);
+ disk->private_data = NULL;
+ idr_remove(&mspro_block_disk_idr, disk_id);
+ put_disk(disk);
+ }
+ }
+
+ mutex_unlock(&mspro_block_disk_lock);
+}
+
+static void mspro_block_bd_release(struct gendisk *disk, fmode_t mode)
+{
+ mspro_block_disk_release(disk);
+}
+
+static int mspro_block_bd_getgeo(struct block_device *bdev,
+ struct hd_geometry *geo)
+{
+ struct mspro_block_data *msb = bdev->bd_disk->private_data;
+
+ geo->heads = msb->heads;
+ geo->sectors = msb->sectors_per_track;
+ geo->cylinders = msb->cylinders;
+
+ return 0;
+}
+
+static const struct block_device_operations ms_block_bdops = {
+ .open = mspro_block_bd_open,
+ .release = mspro_block_bd_release,
+ .getgeo = mspro_block_bd_getgeo,
+ .owner = THIS_MODULE
+};
+
+/*** Information ***/
+
+static struct mspro_sys_attr *mspro_from_sysfs_attr(struct attribute *attr)
+{
+ struct device_attribute *dev_attr
+ = container_of(attr, struct device_attribute, attr);
+ return container_of(dev_attr, struct mspro_sys_attr, dev_attr);
+}
+
+static const char *mspro_block_attr_name(unsigned char tag)
+{
+ switch (tag) {
+ case MSPRO_BLOCK_ID_SYSINFO:
+ return "attr_sysinfo";
+ case MSPRO_BLOCK_ID_MODELNAME:
+ return "attr_modelname";
+ case MSPRO_BLOCK_ID_MBR:
+ return "attr_mbr";
+ case MSPRO_BLOCK_ID_PBR16:
+ return "attr_pbr16";
+ case MSPRO_BLOCK_ID_PBR32:
+ return "attr_pbr32";
+ case MSPRO_BLOCK_ID_SPECFILEVALUES1:
+ return "attr_specfilevalues1";
+ case MSPRO_BLOCK_ID_SPECFILEVALUES2:
+ return "attr_specfilevalues2";
+ case MSPRO_BLOCK_ID_DEVINFO:
+ return "attr_devinfo";
+ default:
+ return NULL;
+ };
+}
+
+typedef ssize_t (*sysfs_show_t)(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer);
+
+static ssize_t mspro_block_attr_show_default(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ struct mspro_sys_attr *s_attr = container_of(attr,
+ struct mspro_sys_attr,
+ dev_attr);
+
+ ssize_t cnt, rc = 0;
+
+ for (cnt = 0; cnt < s_attr->size; cnt++) {
+ if (cnt && !(cnt % 16)) {
+ if (PAGE_SIZE - rc)
+ buffer[rc++] = '\n';
+ }
+
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
+ ((unsigned char *)s_attr->data)[cnt]);
+ }
+ return rc;
+}
+
+static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ struct mspro_sys_attr *x_attr = container_of(attr,
+ struct mspro_sys_attr,
+ dev_attr);
+ struct mspro_sys_info *x_sys = x_attr->data;
+ ssize_t rc = 0;
+ int date_tz = 0, date_tz_f = 0;
+
+ if (x_sys->assembly_date[0] > 0x80U) {
+ date_tz = (~x_sys->assembly_date[0]) + 1;
+ date_tz_f = date_tz & 3;
+ date_tz >>= 2;
+ date_tz = -date_tz;
+ date_tz_f *= 15;
+ } else if (x_sys->assembly_date[0] < 0x80U) {
+ date_tz = x_sys->assembly_date[0];
+ date_tz_f = date_tz & 3;
+ date_tz >>= 2;
+ date_tz_f *= 15;
+ }
+
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
+ x_sys->class);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
+ be16_to_cpu(x_sys->block_size));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
+ be16_to_cpu(x_sys->block_count));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
+ be16_to_cpu(x_sys->user_block_count));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
+ be16_to_cpu(x_sys->page_size));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
+ "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
+ date_tz, date_tz_f,
+ be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
+ x_sys->assembly_date[3], x_sys->assembly_date[4],
+ x_sys->assembly_date[5], x_sys->assembly_date[6],
+ x_sys->assembly_date[7]);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
+ be32_to_cpu(x_sys->serial_number));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
+ "assembly maker code: %x\n",
+ x_sys->assembly_maker_code);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
+ "%02x%02x%02x\n", x_sys->assembly_model_code[0],
+ x_sys->assembly_model_code[1],
+ x_sys->assembly_model_code[2]);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
+ be16_to_cpu(x_sys->memory_maker_code));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
+ be16_to_cpu(x_sys->memory_model_code));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
+ x_sys->vcc);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
+ x_sys->vpp);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
+ be16_to_cpu(x_sys->controller_number));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
+ "controller function: %x\n",
+ be16_to_cpu(x_sys->controller_function));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
+ be16_to_cpu(x_sys->start_sector));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
+ be16_to_cpu(x_sys->unit_size));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
+ x_sys->ms_sub_class);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
+ x_sys->interface_type);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
+ be16_to_cpu(x_sys->controller_code));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
+ x_sys->format_type);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
+ x_sys->device_type);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
+ x_sys->mspro_id);
+ return rc;
+}
+
+static ssize_t mspro_block_attr_show_modelname(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ struct mspro_sys_attr *s_attr = container_of(attr,
+ struct mspro_sys_attr,
+ dev_attr);
+
+ return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
+}
+
+static ssize_t mspro_block_attr_show_mbr(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ struct mspro_sys_attr *x_attr = container_of(attr,
+ struct mspro_sys_attr,
+ dev_attr);
+ struct mspro_mbr *x_mbr = x_attr->data;
+ ssize_t rc = 0;
+
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
+ x_mbr->boot_partition);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
+ x_mbr->start_head);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
+ x_mbr->start_sector);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
+ x_mbr->start_cylinder);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
+ x_mbr->partition_type);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
+ x_mbr->end_head);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
+ x_mbr->end_sector);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
+ x_mbr->end_cylinder);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
+ x_mbr->start_sectors);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
+ "sectors per partition: %x\n",
+ x_mbr->sectors_per_partition);
+ return rc;
+}
+
+static ssize_t mspro_block_attr_show_specfile(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ struct mspro_sys_attr *x_attr = container_of(attr,
+ struct mspro_sys_attr,
+ dev_attr);
+ struct mspro_specfile *x_spfile = x_attr->data;
+ char name[9], ext[4];
+ ssize_t rc = 0;
+
+ memcpy(name, x_spfile->name, 8);
+ name[8] = 0;
+ memcpy(ext, x_spfile->ext, 3);
+ ext[3] = 0;
+
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
+ x_spfile->attr);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
+ x_spfile->time >> 11,
+ (x_spfile->time >> 5) & 0x3f,
+ (x_spfile->time & 0x1f) * 2);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
+ (x_spfile->date >> 9) + 1980,
+ (x_spfile->date >> 5) & 0xf,
+ x_spfile->date & 0x1f);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
+ x_spfile->cluster);
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
+ x_spfile->size);
+ return rc;
+}
+
+static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
+ struct device_attribute *attr,
+ char *buffer)
+{
+ struct mspro_sys_attr *x_attr = container_of(attr,
+ struct mspro_sys_attr,
+ dev_attr);
+ struct mspro_devinfo *x_devinfo = x_attr->data;
+ ssize_t rc = 0;
+
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
+ be16_to_cpu(x_devinfo->cylinders));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
+ be16_to_cpu(x_devinfo->heads));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
+ be16_to_cpu(x_devinfo->bytes_per_track));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
+ be16_to_cpu(x_devinfo->bytes_per_sector));
+ rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
+ be16_to_cpu(x_devinfo->sectors_per_track));
+ return rc;
+}
+
+static sysfs_show_t mspro_block_attr_show(unsigned char tag)
+{
+ switch (tag) {
+ case MSPRO_BLOCK_ID_SYSINFO:
+ return mspro_block_attr_show_sysinfo;
+ case MSPRO_BLOCK_ID_MODELNAME:
+ return mspro_block_attr_show_modelname;
+ case MSPRO_BLOCK_ID_MBR:
+ return mspro_block_attr_show_mbr;
+ case MSPRO_BLOCK_ID_SPECFILEVALUES1:
+ case MSPRO_BLOCK_ID_SPECFILEVALUES2:
+ return mspro_block_attr_show_specfile;
+ case MSPRO_BLOCK_ID_DEVINFO:
+ return mspro_block_attr_show_devinfo;
+ default:
+ return mspro_block_attr_show_default;
+ }
+}
+
+/*** Protocol handlers ***/
+
+/*
+ * Functions prefixed with "h_" are protocol callbacks. They can be called from
+ * interrupt context. Return value of 0 means that request processing is still
+ * ongoing, while special error value of -EAGAIN means that current request is
+ * finished (and request processor should come back some time later).
+ */
+
+static int h_mspro_block_req_init(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+
+ *mrq = &card->current_mrq;
+ card->next_request = msb->mrq_handler;
+ return 0;
+}
+
+static int h_mspro_block_default(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ return mspro_block_complete_req(card, (*mrq)->error);
+}
+
+static int h_mspro_block_default_bad(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ return -ENXIO;
+}
+
+static int h_mspro_block_get_ro(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+
+ if (!(*mrq)->error) {
+ if ((*mrq)->data[offsetof(struct ms_status_register, status0)]
+ & MEMSTICK_STATUS0_WP)
+ msb->read_only = 1;
+ else
+ msb->read_only = 0;
+ }
+
+ return mspro_block_complete_req(card, (*mrq)->error);
+}
+
+static int h_mspro_block_wait_for_ced(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ dev_dbg(&card->dev, "wait for ced: value %x\n", (*mrq)->data[0]);
+
+ if (!(*mrq)->error) {
+ if ((*mrq)->data[0] & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR))
+ (*mrq)->error = -EFAULT;
+ else if (!((*mrq)->data[0] & MEMSTICK_INT_CED))
+ return 0;
+ }
+
+ return mspro_block_complete_req(card, (*mrq)->error);
+}
+
+static int h_mspro_block_transfer_data(struct memstick_dev *card,
+ struct memstick_request **mrq)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ unsigned char t_val = 0;
+ struct scatterlist t_sg = { 0 };
+ size_t t_offset;
+
+ if ((*mrq)->error)
+ return mspro_block_complete_req(card, (*mrq)->error);
+
+ switch ((*mrq)->tpc) {
+ case MS_TPC_WRITE_REG:
+ memstick_init_req(*mrq, MS_TPC_SET_CMD, &msb->transfer_cmd, 1);
+ (*mrq)->need_card_int = 1;
+ return 0;
+ case MS_TPC_SET_CMD:
+ t_val = (*mrq)->int_reg;
+ memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
+ if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT)
+ goto has_int_reg;
+ return 0;
+ case MS_TPC_GET_INT:
+ t_val = (*mrq)->data[0];
+has_int_reg:
+ if (t_val & (MEMSTICK_INT_CMDNAK | MEMSTICK_INT_ERR)) {
+ t_val = MSPRO_CMD_STOP;
+ memstick_init_req(*mrq, MS_TPC_SET_CMD, &t_val, 1);
+ card->next_request = h_mspro_block_default;
+ return 0;
+ }
+
+ if (msb->current_page
+ == (msb->req_sg[msb->current_seg].length
+ / msb->page_size)) {
+ msb->current_page = 0;
+ msb->current_seg++;
+
+ if (msb->current_seg == msb->seg_count) {
+ if (t_val & MEMSTICK_INT_CED) {
+ return mspro_block_complete_req(card,
+ 0);
+ } else {
+ card->next_request
+ = h_mspro_block_wait_for_ced;
+ memstick_init_req(*mrq, MS_TPC_GET_INT,
+ NULL, 1);
+ return 0;
+ }
+ }
+ }
+
+ if (!(t_val & MEMSTICK_INT_BREQ)) {
+ memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
+ return 0;
+ }
+
+ t_offset = msb->req_sg[msb->current_seg].offset;
+ t_offset += msb->current_page * msb->page_size;
+
+ sg_set_page(&t_sg,
+ nth_page(sg_page(&(msb->req_sg[msb->current_seg])),
+ t_offset >> PAGE_SHIFT),
+ msb->page_size, offset_in_page(t_offset));
+
+ memstick_init_req_sg(*mrq, msb->data_dir == READ
+ ? MS_TPC_READ_LONG_DATA
+ : MS_TPC_WRITE_LONG_DATA,
+ &t_sg);
+ (*mrq)->need_card_int = 1;
+ return 0;
+ case MS_TPC_READ_LONG_DATA:
+ case MS_TPC_WRITE_LONG_DATA:
+ msb->current_page++;
+ if (msb->caps & MEMSTICK_CAP_AUTO_GET_INT) {
+ t_val = (*mrq)->int_reg;
+ goto has_int_reg;
+ } else {
+ memstick_init_req(*mrq, MS_TPC_GET_INT, NULL, 1);
+ return 0;
+ }
+
+ default:
+ BUG();
+ }
+}
+
+/*** Transfer setup functions for different access methods. ***/
+
+/** Setup data transfer request for SET_CMD TPC with arguments in card
+ * registers.
+ *
+ * @card Current media instance
+ * @offset Target data offset in bytes
+ * @length Required transfer length in bytes.
+ */
+static void h_mspro_block_setup_cmd(struct memstick_dev *card, u64 offset,
+ size_t length)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ struct mspro_param_register param = {
+ .system = msb->system,
+ .data_count = cpu_to_be16((uint16_t)(length / msb->page_size)),
+ /* ISO C90 warning precludes direct initialization for now. */
+ .data_address = 0,
+ .tpc_param = 0
+ };
+
+ do_div(offset, msb->page_size);
+ param.data_address = cpu_to_be32((uint32_t)offset);
+
+ card->next_request = h_mspro_block_req_init;
+ msb->mrq_handler = h_mspro_block_transfer_data;
+ memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG,
+ &param, sizeof(param));
+}
+
+/*** Data transfer ***/
+
+static int mspro_block_issue_req(struct memstick_dev *card, int chunk)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ u64 t_off;
+ unsigned int count;
+
+try_again:
+ while (chunk) {
+ msb->current_page = 0;
+ msb->current_seg = 0;
+ msb->seg_count = blk_rq_map_sg(msb->block_req->q,
+ msb->block_req,
+ msb->req_sg);
+
+ if (!msb->seg_count) {
+ chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
+ continue;
+ }
+
+ t_off = blk_rq_pos(msb->block_req);
+ t_off <<= 9;
+ count = blk_rq_bytes(msb->block_req);
+
+ msb->setup_transfer(card, t_off, count);
+
+ msb->data_dir = rq_data_dir(msb->block_req);
+ msb->transfer_cmd = msb->data_dir == READ
+ ? MSPRO_CMD_READ_DATA
+ : MSPRO_CMD_WRITE_DATA;
+
+ memstick_new_req(card->host);
+ return 0;
+ }
+
+ dev_dbg(&card->dev, "blk_fetch\n");
+ msb->block_req = blk_fetch_request(msb->queue);
+ if (!msb->block_req) {
+ dev_dbg(&card->dev, "issue end\n");
+ return -EAGAIN;
+ }
+
+ dev_dbg(&card->dev, "trying again\n");
+ chunk = 1;
+ goto try_again;
+}
+
+static int mspro_block_complete_req(struct memstick_dev *card, int error)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ int chunk, cnt;
+ unsigned int t_len = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ dev_dbg(&card->dev, "complete %d, %d\n", msb->has_request ? 1 : 0,
+ error);
+
+ if (msb->has_request) {
+ /* Nothing to do - not really an error */
+ if (error == -EAGAIN)
+ error = 0;
+
+ if (error || (card->current_mrq.tpc == MSPRO_CMD_STOP)) {
+ if (msb->data_dir == READ) {
+ for (cnt = 0; cnt < msb->current_seg; cnt++) {
+ t_len += msb->req_sg[cnt].length
+ / msb->page_size;
+
+ if (msb->current_page)
+ t_len += msb->current_page - 1;
+
+ t_len *= msb->page_size;
+ }
+ }
+ } else
+ t_len = blk_rq_bytes(msb->block_req);
+
+ dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
+
+ if (error && !t_len)
+ t_len = blk_rq_cur_bytes(msb->block_req);
+
+ chunk = __blk_end_request(msb->block_req, error, t_len);
+
+ error = mspro_block_issue_req(card, chunk);
+
+ if (!error)
+ goto out;
+ else
+ msb->has_request = 0;
+ } else {
+ if (!error)
+ error = -EAGAIN;
+ }
+
+ card->next_request = h_mspro_block_default_bad;
+ complete_all(&card->mrq_complete);
+out:
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ return error;
+}
+
+static void mspro_block_stop(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ int rc = 0;
+ unsigned long flags;
+
+ while (1) {
+ spin_lock_irqsave(&msb->q_lock, flags);
+ if (!msb->has_request) {
+ blk_stop_queue(msb->queue);
+ rc = 1;
+ }
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ if (rc)
+ break;
+
+ wait_for_completion(&card->mrq_complete);
+ }
+}
+
+static void mspro_block_start(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ blk_start_queue(msb->queue);
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+}
+
+static int mspro_block_prepare_req(struct request_queue *q, struct request *req)
+{
+ if (req->cmd_type != REQ_TYPE_FS &&
+ req->cmd_type != REQ_TYPE_BLOCK_PC) {
+ blk_dump_rq_flags(req, "MSPro unsupported request");
+ return BLKPREP_KILL;
+ }
+
+ req->cmd_flags |= REQ_DONTPREP;
+
+ return BLKPREP_OK;
+}
+
+static void mspro_block_submit_req(struct request_queue *q)
+{
+ struct memstick_dev *card = q->queuedata;
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ struct request *req = NULL;
+
+ if (msb->has_request)
+ return;
+
+ if (msb->eject) {
+ while ((req = blk_fetch_request(q)) != NULL)
+ __blk_end_request_all(req, -ENODEV);
+
+ return;
+ }
+
+ msb->has_request = 1;
+ if (mspro_block_issue_req(card, 0))
+ msb->has_request = 0;
+}
+
+/*** Initialization ***/
+
+static int mspro_block_wait_for_ced(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+
+ card->next_request = h_mspro_block_req_init;
+ msb->mrq_handler = h_mspro_block_wait_for_ced;
+ memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+ return card->current_mrq.error;
+}
+
+static int mspro_block_set_interface(struct memstick_dev *card,
+ unsigned char sys_reg)
+{
+ struct memstick_host *host = card->host;
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ struct mspro_param_register param = {
+ .system = sys_reg,
+ .data_count = 0,
+ .data_address = 0,
+ .tpc_param = 0
+ };
+
+ card->next_request = h_mspro_block_req_init;
+ msb->mrq_handler = h_mspro_block_default;
+ memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
+ sizeof(param));
+ memstick_new_req(host);
+ wait_for_completion(&card->mrq_complete);
+ return card->current_mrq.error;
+}
+
+static int mspro_block_switch_interface(struct memstick_dev *card)
+{
+ struct memstick_host *host = card->host;
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ int rc = 0;
+
+try_again:
+ if (msb->caps & MEMSTICK_CAP_PAR4)
+ rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
+ else
+ return 0;
+
+ if (rc) {
+ printk(KERN_WARNING
+ "%s: could not switch to 4-bit mode, error %d\n",
+ dev_name(&card->dev), rc);
+ return 0;
+ }
+
+ msb->system = MEMSTICK_SYS_PAR4;
+ host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
+ printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
+ dev_name(&card->dev));
+
+ if (msb->caps & MEMSTICK_CAP_PAR8) {
+ rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
+
+ if (!rc) {
+ msb->system = MEMSTICK_SYS_PAR8;
+ host->set_param(host, MEMSTICK_INTERFACE,
+ MEMSTICK_PAR8);
+ printk(KERN_INFO
+ "%s: switching to 8-bit parallel mode\n",
+ dev_name(&card->dev));
+ } else
+ printk(KERN_WARNING
+ "%s: could not switch to 8-bit mode, error %d\n",
+ dev_name(&card->dev), rc);
+ }
+
+ card->next_request = h_mspro_block_req_init;
+ msb->mrq_handler = h_mspro_block_default;
+ memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+ rc = card->current_mrq.error;
+
+ if (rc) {
+ printk(KERN_WARNING
+ "%s: interface error, trying to fall back to serial\n",
+ dev_name(&card->dev));
+ msb->system = MEMSTICK_SYS_SERIAL;
+ host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+ msleep(10);
+ host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
+ host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
+
+ rc = memstick_set_rw_addr(card);
+ if (!rc)
+ rc = mspro_block_set_interface(card, msb->system);
+
+ if (!rc) {
+ msleep(150);
+ rc = mspro_block_wait_for_ced(card);
+ if (rc)
+ return rc;
+
+ if (msb->caps & MEMSTICK_CAP_PAR8) {
+ msb->caps &= ~MEMSTICK_CAP_PAR8;
+ goto try_again;
+ }
+ }
+ }
+ return rc;
+}
+
+/* Memory allocated for attributes by this function should be freed by
+ * mspro_block_data_clear, no matter if the initialization process succeeded
+ * or failed.
+ */
+static int mspro_block_read_attributes(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ struct mspro_attribute *attr = NULL;
+ struct mspro_sys_attr *s_attr = NULL;
+ unsigned char *buffer = NULL;
+ int cnt, rc, attr_count;
+ /* While normally physical device offsets, represented here by
+ * attr_offset and attr_len will be of large numeric types, we can be
+ * sure, that attributes are close enough to the beginning of the
+ * device, to save ourselves some trouble.
+ */
+ unsigned int addr, attr_offset = 0, attr_len = msb->page_size;
+
+ attr = kmalloc(msb->page_size, GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ sg_init_one(&msb->req_sg[0], attr, msb->page_size);
+ msb->seg_count = 1;
+ msb->current_seg = 0;
+ msb->current_page = 0;
+ msb->data_dir = READ;
+ msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
+
+ msb->setup_transfer(card, attr_offset, attr_len);
+
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+ if (card->current_mrq.error) {
+ rc = card->current_mrq.error;
+ goto out_free_attr;
+ }
+
+ if (be16_to_cpu(attr->signature) != MSPRO_BLOCK_SIGNATURE) {
+ printk(KERN_ERR "%s: unrecognized device signature %x\n",
+ dev_name(&card->dev), be16_to_cpu(attr->signature));
+ rc = -ENODEV;
+ goto out_free_attr;
+ }
+
+ if (attr->count > MSPRO_BLOCK_MAX_ATTRIBUTES) {
+ printk(KERN_WARNING "%s: way too many attribute entries\n",
+ dev_name(&card->dev));
+ attr_count = MSPRO_BLOCK_MAX_ATTRIBUTES;
+ } else
+ attr_count = attr->count;
+
+ msb->attr_group.attrs = kcalloc(attr_count + 1,
+ sizeof(*msb->attr_group.attrs),
+ GFP_KERNEL);
+ if (!msb->attr_group.attrs) {
+ rc = -ENOMEM;
+ goto out_free_attr;
+ }
+ msb->attr_group.name = "media_attributes";
+
+ buffer = kmalloc(attr_len, GFP_KERNEL);
+ if (!buffer) {
+ rc = -ENOMEM;
+ goto out_free_attr;
+ }
+ memcpy(buffer, (char *)attr, attr_len);
+
+ for (cnt = 0; cnt < attr_count; ++cnt) {
+ s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);
+ if (!s_attr) {
+ rc = -ENOMEM;
+ goto out_free_buffer;
+ }
+
+ msb->attr_group.attrs[cnt] = &s_attr->dev_attr.attr;
+ addr = be32_to_cpu(attr->entries[cnt].address);
+ s_attr->size = be32_to_cpu(attr->entries[cnt].size);
+ dev_dbg(&card->dev, "adding attribute %d: id %x, address %x, "
+ "size %zx\n", cnt, attr->entries[cnt].id, addr,
+ s_attr->size);
+ s_attr->id = attr->entries[cnt].id;
+ if (mspro_block_attr_name(s_attr->id))
+ snprintf(s_attr->name, sizeof(s_attr->name), "%s",
+ mspro_block_attr_name(attr->entries[cnt].id));
+ else
+ snprintf(s_attr->name, sizeof(s_attr->name),
+ "attr_x%02x", attr->entries[cnt].id);
+
+ sysfs_attr_init(&s_attr->dev_attr.attr);
+ s_attr->dev_attr.attr.name = s_attr->name;
+ s_attr->dev_attr.attr.mode = S_IRUGO;
+ s_attr->dev_attr.show = mspro_block_attr_show(s_attr->id);
+
+ if (!s_attr->size)
+ continue;
+
+ s_attr->data = kmalloc(s_attr->size, GFP_KERNEL);
+ if (!s_attr->data) {
+ rc = -ENOMEM;
+ goto out_free_buffer;
+ }
+
+ if (((addr / msb->page_size) == (attr_offset / msb->page_size))
+ && (((addr + s_attr->size - 1) / msb->page_size)
+ == (attr_offset / msb->page_size))) {
+ memcpy(s_attr->data, buffer + addr % msb->page_size,
+ s_attr->size);
+ continue;
+ }
+
+ attr_offset = (addr / msb->page_size) * msb->page_size;
+
+ if ((attr_offset + attr_len) < (addr + s_attr->size)) {
+ kfree(buffer);
+ attr_len = (((addr + s_attr->size) / msb->page_size)
+ + 1 ) * msb->page_size - attr_offset;
+ buffer = kmalloc(attr_len, GFP_KERNEL);
+ if (!buffer) {
+ rc = -ENOMEM;
+ goto out_free_attr;
+ }
+ }
+
+ sg_init_one(&msb->req_sg[0], buffer, attr_len);
+ msb->seg_count = 1;
+ msb->current_seg = 0;
+ msb->current_page = 0;
+ msb->data_dir = READ;
+ msb->transfer_cmd = MSPRO_CMD_READ_ATRB;
+
+ dev_dbg(&card->dev, "reading attribute range %x, %x\n",
+ attr_offset, attr_len);
+
+ msb->setup_transfer(card, attr_offset, attr_len);
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+ if (card->current_mrq.error) {
+ rc = card->current_mrq.error;
+ goto out_free_buffer;
+ }
+
+ memcpy(s_attr->data, buffer + addr % msb->page_size,
+ s_attr->size);
+ }
+
+ rc = 0;
+out_free_buffer:
+ kfree(buffer);
+out_free_attr:
+ kfree(attr);
+ return rc;
+}
+
+static int mspro_block_init_card(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ struct memstick_host *host = card->host;
+ int rc = 0;
+
+ msb->system = MEMSTICK_SYS_SERIAL;
+ msb->setup_transfer = h_mspro_block_setup_cmd;
+
+ card->reg_addr.r_offset = offsetof(struct mspro_register, status);
+ card->reg_addr.r_length = sizeof(struct ms_status_register);
+ card->reg_addr.w_offset = offsetof(struct mspro_register, param);
+ card->reg_addr.w_length = sizeof(struct mspro_param_register);
+
+ if (memstick_set_rw_addr(card))
+ return -EIO;
+
+ msb->caps = host->caps;
+
+ msleep(150);
+ rc = mspro_block_wait_for_ced(card);
+ if (rc)
+ return rc;
+
+ rc = mspro_block_switch_interface(card);
+ if (rc)
+ return rc;
+
+ dev_dbg(&card->dev, "card activated\n");
+ if (msb->system != MEMSTICK_SYS_SERIAL)
+ msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
+
+ card->next_request = h_mspro_block_req_init;
+ msb->mrq_handler = h_mspro_block_get_ro;
+ memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, NULL,
+ sizeof(struct ms_status_register));
+ memstick_new_req(card->host);
+ wait_for_completion(&card->mrq_complete);
+ if (card->current_mrq.error)
+ return card->current_mrq.error;
+
+ dev_dbg(&card->dev, "card r/w status %d\n", msb->read_only ? 0 : 1);
+
+ msb->page_size = 512;
+ rc = mspro_block_read_attributes(card);
+ if (rc)
+ return rc;
+
+ dev_dbg(&card->dev, "attributes loaded\n");
+ return 0;
+
+}
+
+static int mspro_block_init_disk(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ struct memstick_host *host = card->host;
+ struct mspro_devinfo *dev_info = NULL;
+ struct mspro_sys_info *sys_info = NULL;
+ struct mspro_sys_attr *s_attr = NULL;
+ int rc, disk_id;
+ u64 limit = BLK_BOUNCE_HIGH;
+ unsigned long capacity;
+
+ if (host->dev.dma_mask && *(host->dev.dma_mask))
+ limit = *(host->dev.dma_mask);
+
+ for (rc = 0; msb->attr_group.attrs[rc]; ++rc) {
+ s_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[rc]);
+
+ if (s_attr->id == MSPRO_BLOCK_ID_DEVINFO)
+ dev_info = s_attr->data;
+ else if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO)
+ sys_info = s_attr->data;
+ }
+
+ if (!dev_info || !sys_info)
+ return -ENODEV;
+
+ msb->cylinders = be16_to_cpu(dev_info->cylinders);
+ msb->heads = be16_to_cpu(dev_info->heads);
+ msb->sectors_per_track = be16_to_cpu(dev_info->sectors_per_track);
+
+ msb->page_size = be16_to_cpu(sys_info->unit_size);
+
+ mutex_lock(&mspro_block_disk_lock);
+ disk_id = idr_alloc(&mspro_block_disk_idr, card, 0, 256, GFP_KERNEL);
+ mutex_unlock(&mspro_block_disk_lock);
+ if (disk_id < 0)
+ return disk_id;
+
+ msb->disk = alloc_disk(1 << MSPRO_BLOCK_PART_SHIFT);
+ if (!msb->disk) {
+ rc = -ENOMEM;
+ goto out_release_id;
+ }
+
+ msb->queue = blk_init_queue(mspro_block_submit_req, &msb->q_lock);
+ if (!msb->queue) {
+ rc = -ENOMEM;
+ goto out_put_disk;
+ }
+
+ msb->queue->queuedata = card;
+ blk_queue_prep_rq(msb->queue, mspro_block_prepare_req);
+
+ blk_queue_bounce_limit(msb->queue, limit);
+ blk_queue_max_hw_sectors(msb->queue, MSPRO_BLOCK_MAX_PAGES);
+ blk_queue_max_segments(msb->queue, MSPRO_BLOCK_MAX_SEGS);
+ blk_queue_max_segment_size(msb->queue,
+ MSPRO_BLOCK_MAX_PAGES * msb->page_size);
+
+ msb->disk->major = major;
+ msb->disk->first_minor = disk_id << MSPRO_BLOCK_PART_SHIFT;
+ msb->disk->fops = &ms_block_bdops;
+ msb->usage_count = 1;
+ msb->disk->private_data = msb;
+ msb->disk->queue = msb->queue;
+ msb->disk->driverfs_dev = &card->dev;
+
+ sprintf(msb->disk->disk_name, "mspblk%d", disk_id);
+
+ blk_queue_logical_block_size(msb->queue, msb->page_size);
+
+ capacity = be16_to_cpu(sys_info->user_block_count);
+ capacity *= be16_to_cpu(sys_info->block_size);
+ capacity *= msb->page_size >> 9;
+ set_capacity(msb->disk, capacity);
+ dev_dbg(&card->dev, "capacity set %ld\n", capacity);
+
+ add_disk(msb->disk);
+ msb->active = 1;
+ return 0;
+
+out_put_disk:
+ put_disk(msb->disk);
+out_release_id:
+ mutex_lock(&mspro_block_disk_lock);
+ idr_remove(&mspro_block_disk_idr, disk_id);
+ mutex_unlock(&mspro_block_disk_lock);
+ return rc;
+}
+
+static void mspro_block_data_clear(struct mspro_block_data *msb)
+{
+ int cnt;
+ struct mspro_sys_attr *s_attr;
+
+ if (msb->attr_group.attrs) {
+ for (cnt = 0; msb->attr_group.attrs[cnt]; ++cnt) {
+ s_attr = mspro_from_sysfs_attr(msb->attr_group
+ .attrs[cnt]);
+ kfree(s_attr->data);
+ kfree(s_attr);
+ }
+ kfree(msb->attr_group.attrs);
+ }
+
+ msb->card = NULL;
+}
+
+static int mspro_block_check_card(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+
+ return (msb->active == 1);
+}
+
+static int mspro_block_probe(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb;
+ int rc = 0;
+
+ msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
+ if (!msb)
+ return -ENOMEM;
+ memstick_set_drvdata(card, msb);
+ msb->card = card;
+ spin_lock_init(&msb->q_lock);
+
+ rc = mspro_block_init_card(card);
+
+ if (rc)
+ goto out_free;
+
+ rc = sysfs_create_group(&card->dev.kobj, &msb->attr_group);
+ if (rc)
+ goto out_free;
+
+ rc = mspro_block_init_disk(card);
+ if (!rc) {
+ card->check = mspro_block_check_card;
+ card->stop = mspro_block_stop;
+ card->start = mspro_block_start;
+ return 0;
+ }
+
+ sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
+out_free:
+ memstick_set_drvdata(card, NULL);
+ mspro_block_data_clear(msb);
+ kfree(msb);
+ return rc;
+}
+
+static void mspro_block_remove(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ msb->eject = 1;
+ blk_start_queue(msb->queue);
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ del_gendisk(msb->disk);
+ dev_dbg(&card->dev, "mspro block remove\n");
+
+ blk_cleanup_queue(msb->queue);
+ msb->queue = NULL;
+
+ sysfs_remove_group(&card->dev.kobj, &msb->attr_group);
+
+ mutex_lock(&mspro_block_disk_lock);
+ mspro_block_data_clear(msb);
+ mutex_unlock(&mspro_block_disk_lock);
+
+ mspro_block_disk_release(msb->disk);
+ memstick_set_drvdata(card, NULL);
+}
+
+#ifdef CONFIG_PM
+
+static int mspro_block_suspend(struct memstick_dev *card, pm_message_t state)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ blk_stop_queue(msb->queue);
+ msb->active = 0;
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+
+ return 0;
+}
+
+static int mspro_block_resume(struct memstick_dev *card)
+{
+ struct mspro_block_data *msb = memstick_get_drvdata(card);
+ unsigned long flags;
+ int rc = 0;
+
+#ifdef CONFIG_MEMSTICK_UNSAFE_RESUME
+
+ struct mspro_block_data *new_msb;
+ struct memstick_host *host = card->host;
+ struct mspro_sys_attr *s_attr, *r_attr;
+ unsigned char cnt;
+
+ mutex_lock(&host->lock);
+ new_msb = kzalloc(sizeof(struct mspro_block_data), GFP_KERNEL);
+ if (!new_msb) {
+ rc = -ENOMEM;
+ goto out_unlock;
+ }
+
+ new_msb->card = card;
+ memstick_set_drvdata(card, new_msb);
+ if (mspro_block_init_card(card))
+ goto out_free;
+
+ for (cnt = 0; new_msb->attr_group.attrs[cnt]
+ && msb->attr_group.attrs[cnt]; ++cnt) {
+ s_attr = mspro_from_sysfs_attr(new_msb->attr_group.attrs[cnt]);
+ r_attr = mspro_from_sysfs_attr(msb->attr_group.attrs[cnt]);
+
+ if (s_attr->id == MSPRO_BLOCK_ID_SYSINFO
+ && r_attr->id == s_attr->id) {
+ if (memcmp(s_attr->data, r_attr->data, s_attr->size))
+ break;
+
+ msb->active = 1;
+ break;
+ }
+ }
+
+out_free:
+ memstick_set_drvdata(card, msb);
+ mspro_block_data_clear(new_msb);
+ kfree(new_msb);
+out_unlock:
+ mutex_unlock(&host->lock);
+
+#endif /* CONFIG_MEMSTICK_UNSAFE_RESUME */
+
+ spin_lock_irqsave(&msb->q_lock, flags);
+ blk_start_queue(msb->queue);
+ spin_unlock_irqrestore(&msb->q_lock, flags);
+ return rc;
+}
+
+#else
+
+#define mspro_block_suspend NULL
+#define mspro_block_resume NULL
+
+#endif /* CONFIG_PM */
+
+static struct memstick_device_id mspro_block_id_tbl[] = {
+ {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_PRO, MEMSTICK_CATEGORY_STORAGE_DUO,
+ MEMSTICK_CLASS_DUO},
+ {}
+};
+
+
+static struct memstick_driver mspro_block_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE
+ },
+ .id_table = mspro_block_id_tbl,
+ .probe = mspro_block_probe,
+ .remove = mspro_block_remove,
+ .suspend = mspro_block_suspend,
+ .resume = mspro_block_resume
+};
+
+static int __init mspro_block_init(void)
+{
+ int rc = -ENOMEM;
+
+ rc = register_blkdev(major, DRIVER_NAME);
+ if (rc < 0) {
+ printk(KERN_ERR DRIVER_NAME ": failed to register "
+ "major %d, error %d\n", major, rc);
+ return rc;
+ }
+ if (!major)
+ major = rc;
+
+ rc = memstick_register_driver(&mspro_block_driver);
+ if (rc)
+ unregister_blkdev(major, DRIVER_NAME);
+ return rc;
+}
+
+static void __exit mspro_block_exit(void)
+{
+ memstick_unregister_driver(&mspro_block_driver);
+ unregister_blkdev(major, DRIVER_NAME);
+ idr_destroy(&mspro_block_disk_idr);
+}
+
+module_init(mspro_block_init);
+module_exit(mspro_block_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alex Dubov");
+MODULE_DESCRIPTION("Sony MemoryStickPro block device driver");
+MODULE_DEVICE_TABLE(memstick, mspro_block_id_tbl);