summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/usb/misc/emi26.c
diff options
context:
space:
mode:
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/usb/misc/emi26.c
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/usb/misc/emi26.c')
-rw-r--r--kernel/drivers/usb/misc/emi26.c262
1 files changed, 262 insertions, 0 deletions
diff --git a/kernel/drivers/usb/misc/emi26.c b/kernel/drivers/usb/misc/emi26.c
new file mode 100644
index 000000000..8950fa5e9
--- /dev/null
+++ b/kernel/drivers/usb/misc/emi26.c
@@ -0,0 +1,262 @@
+/*
+ * Emagic EMI 2|6 usb audio interface firmware loader.
+ * Copyright (C) 2002
+ * Tapio Laxström (tapio.laxstrom@iptime.fi)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, as published by
+ * the Free Software Foundation, version 2.
+ *
+ * emi26.c,v 1.13 2002/03/08 13:10:26 tapio Exp
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/ihex.h>
+
+#define EMI26_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
+#define EMI26_PRODUCT_ID 0x0100 /* EMI 2|6 without firmware */
+#define EMI26B_PRODUCT_ID 0x0102 /* EMI 2|6 without firmware */
+
+#define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
+#define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
+#define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
+#define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
+#define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
+#define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
+
+static int emi26_writememory( struct usb_device *dev, int address,
+ const unsigned char *data, int length,
+ __u8 bRequest);
+static int emi26_set_reset(struct usb_device *dev, unsigned char reset_bit);
+static int emi26_load_firmware (struct usb_device *dev);
+static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id);
+static void emi26_disconnect(struct usb_interface *intf);
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi26_writememory (struct usb_device *dev, int address,
+ const unsigned char *data, int length,
+ __u8 request)
+{
+ int result;
+ unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);
+
+ if (!buffer) {
+ dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);
+ return -ENOMEM;
+ }
+ /* Note: usb_control_msg returns negative value on error or length of the
+ * data that was written! */
+ result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
+ kfree (buffer);
+ return result;
+}
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi26_set_reset (struct usb_device *dev, unsigned char reset_bit)
+{
+ int response;
+ dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);
+ /* printk(KERN_DEBUG "%s - %d", __func__, reset_bit); */
+ response = emi26_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
+ if (response < 0) {
+ dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);
+ }
+ return response;
+}
+
+#define FW_LOAD_SIZE 1023
+
+static int emi26_load_firmware (struct usb_device *dev)
+{
+ const struct firmware *loader_fw = NULL;
+ const struct firmware *bitstream_fw = NULL;
+ const struct firmware *firmware_fw = NULL;
+ const struct ihex_binrec *rec;
+ int err = -ENOMEM;
+ int i;
+ __u32 addr; /* Address to write */
+ __u8 *buf;
+
+ buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
+ if (!buf)
+ goto wraperr;
+
+ err = request_ihex_firmware(&loader_fw, "emi26/loader.fw", &dev->dev);
+ if (err)
+ goto nofw;
+
+ err = request_ihex_firmware(&bitstream_fw, "emi26/bitstream.fw",
+ &dev->dev);
+ if (err)
+ goto nofw;
+
+ err = request_ihex_firmware(&firmware_fw, "emi26/firmware.fw",
+ &dev->dev);
+ if (err) {
+ nofw:
+ dev_err(&dev->dev, "%s - request_firmware() failed\n",
+ __func__);
+ goto wraperr;
+ }
+
+ /* Assert reset (stop the CPU in the EMI) */
+ err = emi26_set_reset(dev,1);
+ if (err < 0)
+ goto wraperr;
+
+ rec = (const struct ihex_binrec *)loader_fw->data;
+ /* 1. We need to put the loader for the FPGA into the EZ-USB */
+ while (rec) {
+ err = emi26_writememory(dev, be32_to_cpu(rec->addr),
+ rec->data, be16_to_cpu(rec->len),
+ ANCHOR_LOAD_INTERNAL);
+ if (err < 0)
+ goto wraperr;
+ rec = ihex_next_binrec(rec);
+ }
+
+ /* De-assert reset (let the CPU run) */
+ err = emi26_set_reset(dev,0);
+ if (err < 0)
+ goto wraperr;
+ msleep(250); /* let device settle */
+
+ /* 2. We upload the FPGA firmware into the EMI
+ * Note: collect up to 1023 (yes!) bytes and send them with
+ * a single request. This is _much_ faster! */
+ rec = (const struct ihex_binrec *)bitstream_fw->data;
+ do {
+ i = 0;
+ addr = be32_to_cpu(rec->addr);
+
+ /* intel hex records are terminated with type 0 element */
+ while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {
+ memcpy(buf + i, rec->data, be16_to_cpu(rec->len));
+ i += be16_to_cpu(rec->len);
+ rec = ihex_next_binrec(rec);
+ }
+ err = emi26_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
+ if (err < 0)
+ goto wraperr;
+ } while (rec);
+
+ /* Assert reset (stop the CPU in the EMI) */
+ err = emi26_set_reset(dev,1);
+ if (err < 0)
+ goto wraperr;
+
+ /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
+ for (rec = (const struct ihex_binrec *)loader_fw->data;
+ rec; rec = ihex_next_binrec(rec)) {
+ err = emi26_writememory(dev, be32_to_cpu(rec->addr),
+ rec->data, be16_to_cpu(rec->len),
+ ANCHOR_LOAD_INTERNAL);
+ if (err < 0)
+ goto wraperr;
+ }
+ msleep(250); /* let device settle */
+
+ /* De-assert reset (let the CPU run) */
+ err = emi26_set_reset(dev,0);
+ if (err < 0)
+ goto wraperr;
+
+ /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
+
+ for (rec = (const struct ihex_binrec *)firmware_fw->data;
+ rec; rec = ihex_next_binrec(rec)) {
+ if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {
+ err = emi26_writememory(dev, be32_to_cpu(rec->addr),
+ rec->data, be16_to_cpu(rec->len),
+ ANCHOR_LOAD_EXTERNAL);
+ if (err < 0)
+ goto wraperr;
+ }
+ }
+
+ /* Assert reset (stop the CPU in the EMI) */
+ err = emi26_set_reset(dev,1);
+ if (err < 0)
+ goto wraperr;
+
+ for (rec = (const struct ihex_binrec *)firmware_fw->data;
+ rec; rec = ihex_next_binrec(rec)) {
+ if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {
+ err = emi26_writememory(dev, be32_to_cpu(rec->addr),
+ rec->data, be16_to_cpu(rec->len),
+ ANCHOR_LOAD_INTERNAL);
+ if (err < 0)
+ goto wraperr;
+ }
+ }
+
+ /* De-assert reset (let the CPU run) */
+ err = emi26_set_reset(dev,0);
+ if (err < 0)
+ goto wraperr;
+ msleep(250); /* let device settle */
+
+ /* return 1 to fail the driver inialization
+ * and give real driver change to load */
+ err = 1;
+
+wraperr:
+ if (err < 0)
+ dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",
+ __func__, err);
+
+ release_firmware(loader_fw);
+ release_firmware(bitstream_fw);
+ release_firmware(firmware_fw);
+
+ kfree(buf);
+ return err;
+}
+
+static const struct usb_device_id id_table[] = {
+ { USB_DEVICE(EMI26_VENDOR_ID, EMI26_PRODUCT_ID) },
+ { USB_DEVICE(EMI26_VENDOR_ID, EMI26B_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+
+ dev_info(&intf->dev, "%s start\n", __func__);
+
+ emi26_load_firmware(dev);
+
+ /* do not return the driver context, let real audio driver do that */
+ return -EIO;
+}
+
+static void emi26_disconnect(struct usb_interface *intf)
+{
+}
+
+static struct usb_driver emi26_driver = {
+ .name = "emi26 - firmware loader",
+ .probe = emi26_probe,
+ .disconnect = emi26_disconnect,
+ .id_table = id_table,
+};
+
+module_usb_driver(emi26_driver);
+
+MODULE_AUTHOR("Tapio Laxström");
+MODULE_DESCRIPTION("Emagic EMI 2|6 firmware loader.");
+MODULE_LICENSE("GPL");
+
+MODULE_FIRMWARE("emi26/loader.fw");
+MODULE_FIRMWARE("emi26/bitstream.fw");
+MODULE_FIRMWARE("emi26/firmware.fw");
+/* vi:ai:syntax=c:sw=8:ts=8:tw=80
+ */