Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 255 insertions, 0 deletions

diff --git a/drivers/usb/misc/emi26.c b/drivers/usb/misc/emi26.c
new file mode 100644
index 000000000000..c8155209bf4b
--- /dev/null
+++ b/drivers/usb/misc/emi26.c
@@ -0,0 +1,255 @@
+/* 
+ * 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/init.h>
+#include <linux/usb.h>
+
+#define MAX_INTEL_HEX_RECORD_LENGTH 16
+typedef struct _INTEL_HEX_RECORD
+{
+	__u32	length;
+	__u32	address;
+	__u32	type;
+	__u8	data[MAX_INTEL_HEX_RECORD_LENGTH];
+} INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;
+
+/* include firmware (variables) */
+#include "emi26_fw.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, 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);
+static int __init emi26_init (void);
+static void __exit emi26_exit (void);
+
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi26_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
+{
+	int result;
+	unsigned char *buffer =  kmalloc (length, GFP_KERNEL);
+
+	if (!buffer) {
+		err("emi26: kmalloc(%d) failed.", length);
+		return -ENOMEM;
+	}
+	memcpy (buffer, data, length);
+	/* 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;
+	info("%s - %d", __FUNCTION__, reset_bit);
+	/* printk(KERN_DEBUG "%s - %d", __FUNCTION__, reset_bit); */
+	response = emi26_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
+	if (response < 0) {
+		err("emi26: set_reset (%d) failed", reset_bit);
+	}
+	return response;
+}
+
+#define FW_LOAD_SIZE		1023
+
+static int emi26_load_firmware (struct usb_device *dev)
+{
+	int err;
+	int i;
+	int pos = 0;	/* Position in hex record */
+	__u32 addr;	/* Address to write */
+	__u8 *buf;
+
+	buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
+	if (!buf) {
+		err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM);
+		err = -ENOMEM;
+		goto wraperr;
+	}
+
+	/* Assert reset (stop the CPU in the EMI) */
+	err = emi26_set_reset(dev,1);
+	if (err < 0) {
+		err( "%s - error loading firmware: error = %d", __FUNCTION__, err);
+		goto wraperr;
+	}
+
+	/* 1. We need to put the loader for the FPGA into the EZ-USB */
+	for (i=0; g_Loader[i].type == 0; i++) {
+		err = emi26_writememory(dev, g_Loader[i].address, g_Loader[i].data, g_Loader[i].length, ANCHOR_LOAD_INTERNAL);
+		if (err < 0) {
+			err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+			goto wraperr;
+		}
+	}
+
+	/* De-assert reset (let the CPU run) */
+	err = emi26_set_reset(dev,0);
+
+	/* 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! */
+	do {
+		i = 0;
+		addr = g_bitstream[pos].address;
+
+		/* intel hex records are terminated with type 0 element */
+		while ((g_bitstream[pos].type == 0) && (i + g_bitstream[pos].length < FW_LOAD_SIZE)) {
+			memcpy(buf + i, g_bitstream[pos].data, g_bitstream[pos].length);
+			i += g_bitstream[pos].length;
+			pos++;
+		}
+		err = emi26_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
+		if (err < 0) {
+			err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+			goto wraperr;
+		}
+	} while (i > 0);
+
+	/* Assert reset (stop the CPU in the EMI) */
+	err = emi26_set_reset(dev,1);
+	if (err < 0) {
+		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+		goto wraperr;
+	}
+
+	/* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
+	for (i=0; g_Loader[i].type == 0; i++) {
+		err = emi26_writememory(dev, g_Loader[i].address, g_Loader[i].data, g_Loader[i].length, ANCHOR_LOAD_INTERNAL);
+		if (err < 0) {
+			err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+			goto wraperr;
+		}
+	}
+
+	/* De-assert reset (let the CPU run) */
+	err = emi26_set_reset(dev,0);
+	if (err < 0) {
+		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+		goto wraperr;
+	}
+
+	/* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
+	for (i=0; g_Firmware[i].type == 0; i++) {
+		if (!INTERNAL_RAM(g_Firmware[i].address)) {
+			err = emi26_writememory(dev, g_Firmware[i].address, g_Firmware[i].data, g_Firmware[i].length, ANCHOR_LOAD_EXTERNAL);
+			if (err < 0) {
+				err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+				goto wraperr;
+			}
+		}
+	}
+	
+	/* Assert reset (stop the CPU in the EMI) */
+	err = emi26_set_reset(dev,1);
+	if (err < 0) {
+		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+		goto wraperr;
+	}
+
+	for (i=0; g_Firmware[i].type == 0; i++) {
+		if (INTERNAL_RAM(g_Firmware[i].address)) {
+			err = emi26_writememory(dev, g_Firmware[i].address, g_Firmware[i].data, g_Firmware[i].length, ANCHOR_LOAD_INTERNAL);
+			if (err < 0) {
+				err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+				goto wraperr;
+			}
+		}
+	}
+
+	/* De-assert reset (let the CPU run) */
+	err = emi26_set_reset(dev,0);
+	if (err < 0) {
+		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+		goto wraperr;
+	}
+
+	/* return 1 to fail the driver inialization
+	 * and give real driver change to load */
+	err = 1;
+
+wraperr:
+	kfree(buf);
+	return err;
+}
+
+static 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);
+
+	info("%s start", __FUNCTION__); 
+
+	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 = {
+	.owner		= THIS_MODULE,
+	.name		= "emi26 - firmware loader",
+	.probe		= emi26_probe,
+	.disconnect	= emi26_disconnect,
+	.id_table	= id_table,
+};
+
+static int __init emi26_init (void)
+{
+	return usb_register(&emi26_driver);
+}
+
+static void __exit emi26_exit (void)
+{
+	usb_deregister (&emi26_driver);
+}
+
+module_init(emi26_init);
+module_exit(emi26_exit);
+
+MODULE_AUTHOR("tapio laxström");
+MODULE_DESCRIPTION("Emagic EMI 2|6 firmware loader.");
+MODULE_LICENSE("GPL");
+
+/* vi:ai:syntax=c:sw=8:ts=8:tw=80
+ */