Initial import

1 files changed, 273 insertions, 0 deletions

diff --git a/drivers/usb/misc/emi62.c b/drivers/usb/misc/emi62.c
new file mode 100644
index 000000000..ebd99146f
--- /dev/null
+++ b/drivers/usb/misc/emi62.c
@@ -0,0 +1,273 @@
+/* 
+ * 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.
+ */
+#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>
+
+/* include firmware (variables)*/
+
+/* FIXME: This is quick and dirty solution! */
+#define SPDIF	/* if you want SPDIF comment next line */
+//#undef SPDIF	/* if you want MIDI uncomment this line */ 
+
+#ifdef SPDIF
+#define FIRMWARE_FW "/*(DEBLOBBED)*/"
+#else
+#define FIRMWARE_FW "/*(DEBLOBBED)*/"
+#endif
+
+#define EMI62_VENDOR_ID 		0x086a  /* Emagic Soft-und Hardware GmBH */
+#define EMI62_PRODUCT_ID		0x0110	/* EMI 6|2m 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 emi62_writememory(struct usb_device *dev, int address,
+			     const unsigned char *data, int length,
+			     __u8 bRequest);
+static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
+static int emi62_load_firmware (struct usb_device *dev);
+static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
+static void emi62_disconnect(struct usb_interface *intf);
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi62_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 emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
+{
+	int response;
+	dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);
+	
+	response = emi62_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 emi62_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;
+
+	dev_dbg(&dev->dev, "load_firmware\n");
+	buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
+	if (!buf)
+		goto wraperr;
+
+	err = reject_firmware(&loader_fw, "/*(DEBLOBBED)*/", &dev->dev);
+	if (err)
+		goto nofw;
+
+	err = reject_firmware(&bitstream_fw, "/*(DEBLOBBED)*/",
+				    &dev->dev);
+	if (err)
+		goto nofw;
+
+	err = reject_firmware(&firmware_fw, FIRMWARE_FW, &dev->dev);
+	if (err) {
+	nofw:
+		goto wraperr;
+	}
+
+	/* Assert reset (stop the CPU in the EMI) */
+	err = emi62_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 = emi62_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 = emi62_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 = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
+		if (err < 0)
+			goto wraperr;
+	} while (rec);
+
+	/* Assert reset (stop the CPU in the EMI) */
+	err = emi62_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 = emi62_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 = emi62_set_reset(dev,0);
+	if (err < 0)
+		goto wraperr;
+	msleep(250);	/* let device settle */
+
+	/* 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 = emi62_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 = emi62_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 = emi62_writememory(dev, be32_to_cpu(rec->addr),
+						rec->data, be16_to_cpu(rec->len),
+						ANCHOR_LOAD_EXTERNAL);
+			if (err < 0)
+				goto wraperr;
+		}
+	}
+
+	/* De-assert reset (let the CPU run) */
+	err = emi62_set_reset(dev,0);
+	if (err < 0)
+		goto wraperr;
+	msleep(250);	/* let device settle */
+
+	release_firmware(loader_fw);
+	release_firmware(bitstream_fw);
+	release_firmware(firmware_fw);
+
+	kfree(buf);
+
+	/* return 1 to fail the driver inialization
+	 * and give real driver change to load */
+	return 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);
+	dev_err(&dev->dev, "Error\n");
+	return err;
+}
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
+	{ }                                             /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	dev_dbg(&intf->dev, "emi62_probe\n");
+
+	dev_info(&intf->dev, "%s start\n", __func__);
+
+	emi62_load_firmware(dev);
+
+	/* do not return the driver context, let real audio driver do that */
+	return -EIO;
+}
+
+static void emi62_disconnect(struct usb_interface *intf)
+{
+}
+
+static struct usb_driver emi62_driver = {
+	.name		= "emi62 - firmware loader",
+	.probe		= emi62_probe,
+	.disconnect	= emi62_disconnect,
+	.id_table	= id_table,
+};
+
+module_usb_driver(emi62_driver);
+
+MODULE_AUTHOR("Tapio Laxström");
+MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
+MODULE_LICENSE("GPL");
+
+/*(DEBLOBBED)*/
+/* vi:ai:syntax=c:sw=8:ts=8:tw=80
+ */