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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/w1
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/w1')
-rw-r--r--kernel/drivers/w1/masters/ds2482.c2
-rw-r--r--kernel/drivers/w1/masters/matrox_w1.c16
-rw-r--r--kernel/drivers/w1/masters/omap_hdq.c224
-rw-r--r--kernel/drivers/w1/masters/w1-gpio.c20
-rw-r--r--kernel/drivers/w1/slaves/w1_bq27000.c5
-rw-r--r--kernel/drivers/w1/slaves/w1_therm.c102
-rw-r--r--kernel/drivers/w1/w1.c17
-rw-r--r--kernel/drivers/w1/w1_int.c3
8 files changed, 322 insertions, 67 deletions
diff --git a/kernel/drivers/w1/masters/ds2482.c b/kernel/drivers/w1/masters/ds2482.c
index e76a9b39a..b05e8fefb 100644
--- a/kernel/drivers/w1/masters/ds2482.c
+++ b/kernel/drivers/w1/masters/ds2482.c
@@ -93,10 +93,10 @@ static const struct i2c_device_id ds2482_id[] = {
{ "ds2482", 0 },
{ }
};
+MODULE_DEVICE_TABLE(i2c, ds2482_id);
static struct i2c_driver ds2482_driver = {
.driver = {
- .owner = THIS_MODULE,
.name = "ds2482",
},
.probe = ds2482_probe,
diff --git a/kernel/drivers/w1/masters/matrox_w1.c b/kernel/drivers/w1/masters/matrox_w1.c
index d8667b021..3749db8b4 100644
--- a/kernel/drivers/w1/masters/matrox_w1.c
+++ b/kernel/drivers/w1/masters/matrox_w1.c
@@ -40,7 +40,7 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
-MODULE_DESCRIPTION("Driver for transport(Dallas 1-wire prtocol) over VGA DDC(matrox gpio).");
+MODULE_DESCRIPTION("Driver for transport(Dallas 1-wire protocol) over VGA DDC(matrox gpio).");
static struct pci_device_id matrox_w1_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MATROX, PCI_DEVICE_ID_MATROX_G400) },
@@ -232,16 +232,4 @@ static void matrox_w1_remove(struct pci_dev *pdev)
}
kfree(dev);
}
-
-static int __init matrox_w1_init(void)
-{
- return pci_register_driver(&matrox_w1_pci_driver);
-}
-
-static void __exit matrox_w1_fini(void)
-{
- pci_unregister_driver(&matrox_w1_pci_driver);
-}
-
-module_init(matrox_w1_init);
-module_exit(matrox_w1_fini);
+module_pci_driver(matrox_w1_pci_driver);
diff --git a/kernel/drivers/w1/masters/omap_hdq.c b/kernel/drivers/w1/masters/omap_hdq.c
index e7d448963..0e2f43bcc 100644
--- a/kernel/drivers/w1/masters/omap_hdq.c
+++ b/kernel/drivers/w1/masters/omap_hdq.c
@@ -17,6 +17,7 @@
#include <linux/io.h>
#include <linux/sched.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
#include "../w1.h"
#include "../w1_int.h"
@@ -27,21 +28,23 @@
#define OMAP_HDQ_TX_DATA 0x04
#define OMAP_HDQ_RX_DATA 0x08
#define OMAP_HDQ_CTRL_STATUS 0x0c
-#define OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK (1<<6)
-#define OMAP_HDQ_CTRL_STATUS_CLOCKENABLE (1<<5)
-#define OMAP_HDQ_CTRL_STATUS_GO (1<<4)
-#define OMAP_HDQ_CTRL_STATUS_INITIALIZATION (1<<2)
-#define OMAP_HDQ_CTRL_STATUS_DIR (1<<1)
-#define OMAP_HDQ_CTRL_STATUS_MODE (1<<0)
+#define OMAP_HDQ_CTRL_STATUS_SINGLE BIT(7)
+#define OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK BIT(6)
+#define OMAP_HDQ_CTRL_STATUS_CLOCKENABLE BIT(5)
+#define OMAP_HDQ_CTRL_STATUS_GO BIT(4)
+#define OMAP_HDQ_CTRL_STATUS_PRESENCE BIT(3)
+#define OMAP_HDQ_CTRL_STATUS_INITIALIZATION BIT(2)
+#define OMAP_HDQ_CTRL_STATUS_DIR BIT(1)
#define OMAP_HDQ_INT_STATUS 0x10
-#define OMAP_HDQ_INT_STATUS_TXCOMPLETE (1<<2)
-#define OMAP_HDQ_INT_STATUS_RXCOMPLETE (1<<1)
-#define OMAP_HDQ_INT_STATUS_TIMEOUT (1<<0)
+#define OMAP_HDQ_INT_STATUS_TXCOMPLETE BIT(2)
+#define OMAP_HDQ_INT_STATUS_RXCOMPLETE BIT(1)
+#define OMAP_HDQ_INT_STATUS_TIMEOUT BIT(0)
#define OMAP_HDQ_SYSCONFIG 0x14
-#define OMAP_HDQ_SYSCONFIG_SOFTRESET (1<<1)
-#define OMAP_HDQ_SYSCONFIG_AUTOIDLE (1<<0)
+#define OMAP_HDQ_SYSCONFIG_SOFTRESET BIT(1)
+#define OMAP_HDQ_SYSCONFIG_AUTOIDLE BIT(0)
+#define OMAP_HDQ_SYSCONFIG_NOIDLE 0x0
#define OMAP_HDQ_SYSSTATUS 0x18
-#define OMAP_HDQ_SYSSTATUS_RESETDONE (1<<0)
+#define OMAP_HDQ_SYSSTATUS_RESETDONE BIT(0)
#define OMAP_HDQ_FLAG_CLEAR 0
#define OMAP_HDQ_FLAG_SET 1
@@ -67,6 +70,10 @@ struct hdq_data {
* the data wrire or read.
*/
int init_trans;
+ int rrw;
+ /* mode: 0-HDQ 1-W1 */
+ int mode;
+
};
static int omap_hdq_probe(struct platform_device *pdev);
@@ -74,6 +81,7 @@ static int omap_hdq_remove(struct platform_device *pdev);
static const struct of_device_id omap_hdq_dt_ids[] = {
{ .compatible = "ti,omap3-1w" },
+ { .compatible = "ti,am4372-hdq" },
{}
};
MODULE_DEVICE_TABLE(of, omap_hdq_dt_ids);
@@ -90,15 +98,12 @@ static struct platform_driver omap_hdq_driver = {
static u8 omap_w1_read_byte(void *_hdq);
static void omap_w1_write_byte(void *_hdq, u8 byte);
static u8 omap_w1_reset_bus(void *_hdq);
-static void omap_w1_search_bus(void *_hdq, struct w1_master *master_dev,
- u8 search_type, w1_slave_found_callback slave_found);
static struct w1_bus_master omap_w1_master = {
.read_byte = omap_w1_read_byte,
.write_byte = omap_w1_write_byte,
.reset_bus = omap_w1_reset_bus,
- .search = omap_w1_search_bus,
};
/* HDQ register I/O routines */
@@ -122,6 +127,15 @@ static inline u8 hdq_reg_merge(struct hdq_data *hdq_data, u32 offset,
return new_val;
}
+static void hdq_disable_interrupt(struct hdq_data *hdq_data, u32 offset,
+ u32 mask)
+{
+ u32 ie;
+
+ ie = readl(hdq_data->hdq_base + offset);
+ writel(ie & mask, hdq_data->hdq_base + offset);
+}
+
/*
* Wait for one or more bits in flag change.
* HDQ_FLAG_SET: wait until any bit in the flag is set.
@@ -229,13 +243,7 @@ static irqreturn_t hdq_isr(int irq, void *_hdq)
return IRQ_HANDLED;
}
-/* HDQ Mode: always return success */
-static u8 omap_w1_reset_bus(void *_hdq)
-{
- return 0;
-}
-
-/* W1 search callback function */
+/* W1 search callback function in HDQ mode */
static void omap_w1_search_bus(void *_hdq, struct w1_master *master_dev,
u8 search_type, w1_slave_found_callback slave_found)
{
@@ -262,9 +270,10 @@ static int _omap_hdq_reset(struct hdq_data *hdq_data)
int ret;
u8 tmp_status;
- hdq_reg_out(hdq_data, OMAP_HDQ_SYSCONFIG, OMAP_HDQ_SYSCONFIG_SOFTRESET);
+ hdq_reg_out(hdq_data, OMAP_HDQ_SYSCONFIG,
+ OMAP_HDQ_SYSCONFIG_SOFTRESET);
/*
- * Select HDQ mode & enable clocks.
+ * Select HDQ/1W mode & enable clocks.
* It is observed that INT flags can't be cleared via a read and GO/INIT
* won't return to zero if interrupt is disabled. So we always enable
* interrupt.
@@ -282,7 +291,8 @@ static int _omap_hdq_reset(struct hdq_data *hdq_data)
else {
hdq_reg_out(hdq_data, OMAP_HDQ_CTRL_STATUS,
OMAP_HDQ_CTRL_STATUS_CLOCKENABLE |
- OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK);
+ OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK |
+ hdq_data->mode);
hdq_reg_out(hdq_data, OMAP_HDQ_SYSCONFIG,
OMAP_HDQ_SYSCONFIG_AUTOIDLE);
}
@@ -334,6 +344,18 @@ static int omap_hdq_break(struct hdq_data *hdq_data)
ret = -ETIMEDOUT;
goto out;
}
+
+ /*
+ * check for the presence detect bit to get
+ * set to show that the slave is responding
+ */
+ if (!(hdq_reg_in(hdq_data, OMAP_HDQ_CTRL_STATUS) &
+ OMAP_HDQ_CTRL_STATUS_PRESENCE)) {
+ dev_dbg(hdq_data->dev, "Presence bit not set\n");
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+
/*
* wait for both INIT and GO bits rerurn to zero.
* zero wait time expected for interrupt mode.
@@ -368,6 +390,8 @@ static int hdq_read_byte(struct hdq_data *hdq_data, u8 *val)
goto out;
}
+ hdq_data->hdq_irqstatus = 0;
+
if (!(hdq_data->hdq_irqstatus & OMAP_HDQ_INT_STATUS_RXCOMPLETE)) {
hdq_reg_merge(hdq_data, OMAP_HDQ_CTRL_STATUS,
OMAP_HDQ_CTRL_STATUS_DIR | OMAP_HDQ_CTRL_STATUS_GO,
@@ -400,7 +424,7 @@ rtn:
}
-/* Enable clocks and set the controller to HDQ mode */
+/* Enable clocks and set the controller to HDQ/1W mode */
static int omap_hdq_get(struct hdq_data *hdq_data)
{
int ret = 0;
@@ -422,7 +446,7 @@ static int omap_hdq_get(struct hdq_data *hdq_data)
pm_runtime_get_sync(hdq_data->dev);
- /* make sure HDQ is out of reset */
+ /* make sure HDQ/1W is out of reset */
if (!(hdq_reg_in(hdq_data, OMAP_HDQ_SYSSTATUS) &
OMAP_HDQ_SYSSTATUS_RESETDONE)) {
ret = _omap_hdq_reset(hdq_data);
@@ -430,12 +454,13 @@ static int omap_hdq_get(struct hdq_data *hdq_data)
/* back up the count */
hdq_data->hdq_usecount--;
} else {
- /* select HDQ mode & enable clocks */
+ /* select HDQ/1W mode & enable clocks */
hdq_reg_out(hdq_data, OMAP_HDQ_CTRL_STATUS,
OMAP_HDQ_CTRL_STATUS_CLOCKENABLE |
- OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK);
+ OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK |
+ hdq_data->mode);
hdq_reg_out(hdq_data, OMAP_HDQ_SYSCONFIG,
- OMAP_HDQ_SYSCONFIG_AUTOIDLE);
+ OMAP_HDQ_SYSCONFIG_NOIDLE);
hdq_reg_in(hdq_data, OMAP_HDQ_INT_STATUS);
}
}
@@ -456,6 +481,8 @@ static int omap_hdq_put(struct hdq_data *hdq_data)
if (ret < 0)
return -EINTR;
+ hdq_reg_out(hdq_data, OMAP_HDQ_SYSCONFIG,
+ OMAP_HDQ_SYSCONFIG_AUTOIDLE);
if (0 == hdq_data->hdq_usecount) {
dev_dbg(hdq_data->dev, "attempt to decrement use count"
" when it is zero");
@@ -471,6 +498,100 @@ static int omap_hdq_put(struct hdq_data *hdq_data)
return ret;
}
+/*
+ * W1 triplet callback function - used for searching ROM addresses.
+ * Registered only when controller is in 1-wire mode.
+ */
+static u8 omap_w1_triplet(void *_hdq, u8 bdir)
+{
+ u8 id_bit, comp_bit;
+ int err;
+ u8 ret = 0x3; /* no slaves responded */
+ struct hdq_data *hdq_data = _hdq;
+ u8 ctrl = OMAP_HDQ_CTRL_STATUS_SINGLE | OMAP_HDQ_CTRL_STATUS_GO |
+ OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK;
+ u8 mask = ctrl | OMAP_HDQ_CTRL_STATUS_DIR;
+
+ omap_hdq_get(_hdq);
+
+ err = mutex_lock_interruptible(&hdq_data->hdq_mutex);
+ if (err < 0) {
+ dev_dbg(hdq_data->dev, "Could not acquire mutex\n");
+ goto rtn;
+ }
+
+ hdq_data->hdq_irqstatus = 0;
+ /* read id_bit */
+ hdq_reg_merge(_hdq, OMAP_HDQ_CTRL_STATUS,
+ ctrl | OMAP_HDQ_CTRL_STATUS_DIR, mask);
+ err = wait_event_timeout(hdq_wait_queue,
+ (hdq_data->hdq_irqstatus
+ & OMAP_HDQ_INT_STATUS_RXCOMPLETE),
+ OMAP_HDQ_TIMEOUT);
+ if (err == 0) {
+ dev_dbg(hdq_data->dev, "RX wait elapsed\n");
+ goto out;
+ }
+ id_bit = (hdq_reg_in(_hdq, OMAP_HDQ_RX_DATA) & 0x01);
+
+ hdq_data->hdq_irqstatus = 0;
+ /* read comp_bit */
+ hdq_reg_merge(_hdq, OMAP_HDQ_CTRL_STATUS,
+ ctrl | OMAP_HDQ_CTRL_STATUS_DIR, mask);
+ err = wait_event_timeout(hdq_wait_queue,
+ (hdq_data->hdq_irqstatus
+ & OMAP_HDQ_INT_STATUS_RXCOMPLETE),
+ OMAP_HDQ_TIMEOUT);
+ if (err == 0) {
+ dev_dbg(hdq_data->dev, "RX wait elapsed\n");
+ goto out;
+ }
+ comp_bit = (hdq_reg_in(_hdq, OMAP_HDQ_RX_DATA) & 0x01);
+
+ if (id_bit && comp_bit) {
+ ret = 0x03; /* no slaves responded */
+ goto out;
+ }
+ if (!id_bit && !comp_bit) {
+ /* Both bits are valid, take the direction given */
+ ret = bdir ? 0x04 : 0;
+ } else {
+ /* Only one bit is valid, take that direction */
+ bdir = id_bit;
+ ret = id_bit ? 0x05 : 0x02;
+ }
+
+ /* write bdir bit */
+ hdq_reg_out(_hdq, OMAP_HDQ_TX_DATA, bdir);
+ hdq_reg_merge(_hdq, OMAP_HDQ_CTRL_STATUS, ctrl, mask);
+ err = wait_event_timeout(hdq_wait_queue,
+ (hdq_data->hdq_irqstatus
+ & OMAP_HDQ_INT_STATUS_TXCOMPLETE),
+ OMAP_HDQ_TIMEOUT);
+ if (err == 0) {
+ dev_dbg(hdq_data->dev, "TX wait elapsed\n");
+ goto out;
+ }
+
+ hdq_reg_merge(_hdq, OMAP_HDQ_CTRL_STATUS, 0,
+ OMAP_HDQ_CTRL_STATUS_SINGLE);
+
+out:
+ mutex_unlock(&hdq_data->hdq_mutex);
+rtn:
+ omap_hdq_put(_hdq);
+ return ret;
+}
+
+/* reset callback */
+static u8 omap_w1_reset_bus(void *_hdq)
+{
+ omap_hdq_get(_hdq);
+ omap_hdq_break(_hdq);
+ omap_hdq_put(_hdq);
+ return 0;
+}
+
/* Read a byte of data from the device */
static u8 omap_w1_read_byte(void *_hdq)
{
@@ -478,6 +599,10 @@ static u8 omap_w1_read_byte(void *_hdq)
u8 val = 0;
int ret;
+ /* First write to initialize the transfer */
+ if (hdq_data->init_trans == 0)
+ omap_hdq_get(hdq_data);
+
ret = hdq_read_byte(hdq_data, &val);
if (ret) {
ret = mutex_lock_interruptible(&hdq_data->hdq_mutex);
@@ -491,6 +616,10 @@ static u8 omap_w1_read_byte(void *_hdq)
return -1;
}
+ hdq_disable_interrupt(hdq_data, OMAP_HDQ_CTRL_STATUS,
+ ~OMAP_HDQ_CTRL_STATUS_INTERRUPTMASK);
+ hdq_data->hdq_usecount = 0;
+
/* Write followed by a read, release the module */
if (hdq_data->init_trans) {
ret = mutex_lock_interruptible(&hdq_data->hdq_mutex);
@@ -517,6 +646,14 @@ static void omap_w1_write_byte(void *_hdq, u8 byte)
if (hdq_data->init_trans == 0)
omap_hdq_get(hdq_data);
+ /*
+ * We need to reset the slave before
+ * issuing the SKIP ROM command, else
+ * the slave will not work.
+ */
+ if (byte == W1_SKIP_ROM)
+ omap_hdq_break(hdq_data);
+
ret = mutex_lock_interruptible(&hdq_data->hdq_mutex);
if (ret < 0) {
dev_dbg(hdq_data->dev, "Could not acquire mutex\n");
@@ -551,6 +688,7 @@ static int omap_hdq_probe(struct platform_device *pdev)
struct resource *res;
int ret, irq;
u8 rev;
+ const char *mode;
hdq_data = devm_kzalloc(dev, sizeof(*hdq_data), GFP_KERNEL);
if (!hdq_data) {
@@ -567,10 +705,21 @@ static int omap_hdq_probe(struct platform_device *pdev)
return PTR_ERR(hdq_data->hdq_base);
hdq_data->hdq_usecount = 0;
+ hdq_data->rrw = 0;
mutex_init(&hdq_data->hdq_mutex);
pm_runtime_enable(&pdev->dev);
- pm_runtime_get_sync(&pdev->dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0) {
+ dev_dbg(&pdev->dev, "pm_runtime_get_sync failed\n");
+ goto err_w1;
+ }
+
+ ret = _omap_hdq_reset(hdq_data);
+ if (ret) {
+ dev_dbg(&pdev->dev, "reset failed\n");
+ return -EINVAL;
+ }
rev = hdq_reg_in(hdq_data, OMAP_HDQ_REVISION);
dev_info(&pdev->dev, "OMAP HDQ Hardware Rev %c.%c. Driver in %s mode\n",
@@ -594,6 +743,15 @@ static int omap_hdq_probe(struct platform_device *pdev)
pm_runtime_put_sync(&pdev->dev);
+ ret = of_property_read_string(pdev->dev.of_node, "ti,mode", &mode);
+ if (ret < 0 || !strcmp(mode, "hdq")) {
+ hdq_data->mode = 0;
+ omap_w1_master.search = omap_w1_search_bus;
+ } else {
+ hdq_data->mode = 1;
+ omap_w1_master.triplet = omap_w1_triplet;
+ }
+
omap_w1_master.data = hdq_data;
ret = w1_add_master_device(&omap_w1_master);
@@ -635,8 +793,8 @@ static int omap_hdq_remove(struct platform_device *pdev)
module_platform_driver(omap_hdq_driver);
module_param(w1_id, int, S_IRUSR);
-MODULE_PARM_DESC(w1_id, "1-wire id for the slave detection");
+MODULE_PARM_DESC(w1_id, "1-wire id for the slave detection in HDQ mode");
MODULE_AUTHOR("Texas Instruments");
-MODULE_DESCRIPTION("HDQ driver Library");
+MODULE_DESCRIPTION("HDQ-1W driver Library");
MODULE_LICENSE("GPL");
diff --git a/kernel/drivers/w1/masters/w1-gpio.c b/kernel/drivers/w1/masters/w1-gpio.c
index 8f7848c62..a373ae69d 100644
--- a/kernel/drivers/w1/masters/w1-gpio.c
+++ b/kernel/drivers/w1/masters/w1-gpio.c
@@ -198,11 +198,9 @@ static int w1_gpio_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_PM
-
-static int w1_gpio_suspend(struct platform_device *pdev, pm_message_t state)
+static int __maybe_unused w1_gpio_suspend(struct device *dev)
{
- struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct w1_gpio_platform_data *pdata = dev_get_platdata(dev);
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(0);
@@ -210,9 +208,9 @@ static int w1_gpio_suspend(struct platform_device *pdev, pm_message_t state)
return 0;
}
-static int w1_gpio_resume(struct platform_device *pdev)
+static int __maybe_unused w1_gpio_resume(struct device *dev)
{
- struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct w1_gpio_platform_data *pdata = dev_get_platdata(dev);
if (pdata->enable_external_pullup)
pdata->enable_external_pullup(1);
@@ -220,20 +218,16 @@ static int w1_gpio_resume(struct platform_device *pdev)
return 0;
}
-#else
-#define w1_gpio_suspend NULL
-#define w1_gpio_resume NULL
-#endif
+static SIMPLE_DEV_PM_OPS(w1_gpio_pm_ops, w1_gpio_suspend, w1_gpio_resume);
static struct platform_driver w1_gpio_driver = {
.driver = {
.name = "w1-gpio",
+ .pm = &w1_gpio_pm_ops,
.of_match_table = of_match_ptr(w1_gpio_dt_ids),
},
.probe = w1_gpio_probe,
- .remove = w1_gpio_remove,
- .suspend = w1_gpio_suspend,
- .resume = w1_gpio_resume,
+ .remove = w1_gpio_remove,
};
module_platform_driver(w1_gpio_driver);
diff --git a/kernel/drivers/w1/slaves/w1_bq27000.c b/kernel/drivers/w1/slaves/w1_bq27000.c
index caafb1722..9f4a86b75 100644
--- a/kernel/drivers/w1/slaves/w1_bq27000.c
+++ b/kernel/drivers/w1/slaves/w1_bq27000.c
@@ -15,7 +15,7 @@
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
-#include <linux/power/bq27x00_battery.h>
+#include <linux/power/bq27xxx_battery.h>
#include "../w1.h"
#include "../w1_int.h"
@@ -39,9 +39,10 @@ static int w1_bq27000_read(struct device *dev, unsigned int reg)
return val;
}
-static struct bq27000_platform_data bq27000_battery_info = {
+static struct bq27xxx_platform_data bq27000_battery_info = {
.read = w1_bq27000_read,
.name = "bq27000-battery",
+ .chip = BQ27000,
};
static int w1_bq27000_add_slave(struct w1_slave *sl)
diff --git a/kernel/drivers/w1/slaves/w1_therm.c b/kernel/drivers/w1/slaves/w1_therm.c
index 55eb86c9e..2f029e8f4 100644
--- a/kernel/drivers/w1/slaves/w1_therm.c
+++ b/kernel/drivers/w1/slaves/w1_therm.c
@@ -92,13 +92,24 @@ static void w1_therm_remove_slave(struct w1_slave *sl)
static ssize_t w1_slave_show(struct device *device,
struct device_attribute *attr, char *buf);
+static ssize_t w1_seq_show(struct device *device,
+ struct device_attribute *attr, char *buf);
+
static DEVICE_ATTR_RO(w1_slave);
+static DEVICE_ATTR_RO(w1_seq);
static struct attribute *w1_therm_attrs[] = {
&dev_attr_w1_slave.attr,
NULL,
};
+
+static struct attribute *w1_ds28ea00_attrs[] = {
+ &dev_attr_w1_slave.attr,
+ &dev_attr_w1_seq.attr,
+ NULL,
+};
ATTRIBUTE_GROUPS(w1_therm);
+ATTRIBUTE_GROUPS(w1_ds28ea00);
static struct w1_family_ops w1_therm_fops = {
.add_slave = w1_therm_add_slave,
@@ -106,6 +117,12 @@ static struct w1_family_ops w1_therm_fops = {
.groups = w1_therm_groups,
};
+static struct w1_family_ops w1_ds28ea00_fops = {
+ .add_slave = w1_therm_add_slave,
+ .remove_slave = w1_therm_remove_slave,
+ .groups = w1_ds28ea00_groups,
+};
+
static struct w1_family w1_therm_family_DS18S20 = {
.fid = W1_THERM_DS18S20,
.fops = &w1_therm_fops,
@@ -123,7 +140,7 @@ static struct w1_family w1_therm_family_DS1822 = {
static struct w1_family w1_therm_family_DS28EA00 = {
.fid = W1_THERM_DS28EA00,
- .fops = &w1_therm_fops,
+ .fops = &w1_ds28ea00_fops,
};
static struct w1_family w1_therm_family_DS1825 = {
@@ -316,6 +333,89 @@ post_unlock:
return ret;
}
+#define W1_42_CHAIN 0x99
+#define W1_42_CHAIN_OFF 0x3C
+#define W1_42_CHAIN_OFF_INV 0xC3
+#define W1_42_CHAIN_ON 0x5A
+#define W1_42_CHAIN_ON_INV 0xA5
+#define W1_42_CHAIN_DONE 0x96
+#define W1_42_CHAIN_DONE_INV 0x69
+#define W1_42_COND_READ 0x0F
+#define W1_42_SUCCESS_CONFIRM_BYTE 0xAA
+#define W1_42_FINISHED_BYTE 0xFF
+static ssize_t w1_seq_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct w1_slave *sl = dev_to_w1_slave(device);
+ ssize_t c = PAGE_SIZE;
+ int rv;
+ int i;
+ u8 ack;
+ u64 rn;
+ struct w1_reg_num *reg_num;
+ int seq = 0;
+
+ mutex_lock(&sl->master->bus_mutex);
+ /* Place all devices in CHAIN state */
+ if (w1_reset_bus(sl->master))
+ goto error;
+ w1_write_8(sl->master, W1_SKIP_ROM);
+ w1_write_8(sl->master, W1_42_CHAIN);
+ w1_write_8(sl->master, W1_42_CHAIN_ON);
+ w1_write_8(sl->master, W1_42_CHAIN_ON_INV);
+ msleep(sl->master->pullup_duration);
+
+ /* check for acknowledgment */
+ ack = w1_read_8(sl->master);
+ if (ack != W1_42_SUCCESS_CONFIRM_BYTE)
+ goto error;
+
+ /* In case the bus fails to send 0xFF, limit*/
+ for (i = 0; i <= 64; i++) {
+ if (w1_reset_bus(sl->master))
+ goto error;
+
+ w1_write_8(sl->master, W1_42_COND_READ);
+ rv = w1_read_block(sl->master, (u8 *)&rn, 8);
+ reg_num = (struct w1_reg_num *) &rn;
+ if (reg_num->family == W1_42_FINISHED_BYTE)
+ break;
+ if (sl->reg_num.id == reg_num->id)
+ seq = i;
+
+ w1_write_8(sl->master, W1_42_CHAIN);
+ w1_write_8(sl->master, W1_42_CHAIN_DONE);
+ w1_write_8(sl->master, W1_42_CHAIN_DONE_INV);
+ w1_read_block(sl->master, &ack, sizeof(ack));
+
+ /* check for acknowledgment */
+ ack = w1_read_8(sl->master);
+ if (ack != W1_42_SUCCESS_CONFIRM_BYTE)
+ goto error;
+
+ }
+
+ /* Exit from CHAIN state */
+ if (w1_reset_bus(sl->master))
+ goto error;
+ w1_write_8(sl->master, W1_SKIP_ROM);
+ w1_write_8(sl->master, W1_42_CHAIN);
+ w1_write_8(sl->master, W1_42_CHAIN_OFF);
+ w1_write_8(sl->master, W1_42_CHAIN_OFF_INV);
+
+ /* check for acknowledgment */
+ ack = w1_read_8(sl->master);
+ if (ack != W1_42_SUCCESS_CONFIRM_BYTE)
+ goto error;
+ mutex_unlock(&sl->master->bus_mutex);
+
+ c -= snprintf(buf + PAGE_SIZE - c, c, "%d\n", seq);
+ return PAGE_SIZE - c;
+error:
+ mutex_unlock(&sl->master->bus_mutex);
+ return -EIO;
+}
+
static int __init w1_therm_init(void)
{
int err, i;
diff --git a/kernel/drivers/w1/w1.c b/kernel/drivers/w1/w1.c
index 181f41cb9..c9a7ff67d 100644
--- a/kernel/drivers/w1/w1.c
+++ b/kernel/drivers/w1/w1.c
@@ -46,11 +46,15 @@ MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol.");
static int w1_timeout = 10;
+static int w1_timeout_us = 0;
int w1_max_slave_count = 64;
int w1_max_slave_ttl = 10;
module_param_named(timeout, w1_timeout, int, 0);
MODULE_PARM_DESC(timeout, "time in seconds between automatic slave searches");
+module_param_named(timeout_us, w1_timeout_us, int, 0);
+MODULE_PARM_DESC(timeout, "time in microseconds between automatic slave"
+ " searches");
/* A search stops when w1_max_slave_count devices have been found in that
* search. The next search will start over and detect the same set of devices
* on a static 1-wire bus. Memory is not allocated based on this number, just
@@ -317,6 +321,14 @@ static ssize_t w1_master_attribute_show_timeout(struct device *dev, struct devic
return count;
}
+static ssize_t w1_master_attribute_show_timeout_us(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t count;
+ count = sprintf(buf, "%d\n", w1_timeout_us);
+ return count;
+}
+
static ssize_t w1_master_attribute_store_max_slave_count(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
@@ -543,6 +555,7 @@ static W1_MASTER_ATTR_RO(slave_count, S_IRUGO);
static W1_MASTER_ATTR_RW(max_slave_count, S_IRUGO | S_IWUSR | S_IWGRP);
static W1_MASTER_ATTR_RO(attempts, S_IRUGO);
static W1_MASTER_ATTR_RO(timeout, S_IRUGO);
+static W1_MASTER_ATTR_RO(timeout_us, S_IRUGO);
static W1_MASTER_ATTR_RO(pointer, S_IRUGO);
static W1_MASTER_ATTR_RW(search, S_IRUGO | S_IWUSR | S_IWGRP);
static W1_MASTER_ATTR_RW(pullup, S_IRUGO | S_IWUSR | S_IWGRP);
@@ -556,6 +569,7 @@ static struct attribute *w1_master_default_attrs[] = {
&w1_master_attribute_max_slave_count.attr,
&w1_master_attribute_attempts.attr,
&w1_master_attribute_timeout.attr,
+ &w1_master_attribute_timeout_us.attr,
&w1_master_attribute_pointer.attr,
&w1_master_attribute_search.attr,
&w1_master_attribute_pullup.attr,
@@ -1108,7 +1122,8 @@ int w1_process(void *data)
/* As long as w1_timeout is only set by a module parameter the sleep
* time can be calculated in jiffies once.
*/
- const unsigned long jtime = msecs_to_jiffies(w1_timeout * 1000);
+ const unsigned long jtime =
+ usecs_to_jiffies(w1_timeout * 1000000 + w1_timeout_us);
/* remainder if it woke up early */
unsigned long jremain = 0;
diff --git a/kernel/drivers/w1/w1_int.c b/kernel/drivers/w1/w1_int.c
index 47249a30e..20f766afa 100644
--- a/kernel/drivers/w1/w1_int.c
+++ b/kernel/drivers/w1/w1_int.c
@@ -91,8 +91,7 @@ static struct w1_master *w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
err = device_register(&dev->dev);
if (err) {
pr_err("Failed to register master device. err=%d\n", err);
- memset(dev, 0, sizeof(struct w1_master));
- kfree(dev);
+ put_device(&dev->dev);
dev = NULL;
}