drivers/usb/misc/emi62.c - linux - Git at Google

 /*
  * 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.
  *
  * $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $
  */
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/usb.h>
 #include <linux/delay.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)*/

 /* 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
 #  include "emi62_fw_s.h" /* spdif fw */
 #else
 #  include "emi62_fw_m.h" /* midi fw */
 #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, 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);
 static int __init emi62_init (void);
 static void __exit emi62_exit (void);


 /* thanks to drivers/usb/serial/keyspan_pda.c code */
 static int emi62_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
 {
 	int result;
 	unsigned char *buffer =  kmemdup(data, length, GFP_KERNEL);

 	if (!buffer) {
 		err("emi62: kmalloc(%d) failed.", 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;
 	info("%s - %d", __FUNCTION__, reset_bit);

 	response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
 	if (response < 0) {
 		err("emi62: set_reset (%d) failed", reset_bit);
 	}
 	return response;
 }

 #define FW_LOAD_SIZE		1023

 static int emi62_load_firmware (struct usb_device *dev)
 {
 	int err;
 	int i;
 	int pos = 0;	/* Position in hex record */
 	__u32 addr;	/* Address to write */
 	__u8 *buf;

 	dev_dbg(&dev->dev, "load_firmware\n");
 	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 = emi62_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_emi62_loader[i].type == 0; i++) {
 		err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_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 = emi62_set_reset(dev,0);
 	if (err < 0) {
 		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 		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! */
 	do {
 		i = 0;
 		addr = g_emi62bs[pos].address;

 		/* intel hex records are terminated with type 0 element */
 		while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
 			memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
 			i += g_emi62bs[pos].length;
 			pos++;
 		}
 		err = emi62_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 = emi62_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_emi62_loader[i].type == 0; i++) {
 		err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_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 = emi62_set_reset(dev,0);
 	if (err < 0) {
 		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 		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 */

 /* FIXME: quick and dirty ifdefs */
 #ifdef SPDIF
 	for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
 		if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
 			err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
 			if (err < 0) {
 				err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 				goto wraperr;
 			}
 		}
 	}
 #else /* MIDI */
 	for (i=0; g_HexMidiFw62[i].type == 0; i++) {
 		if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
 			err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
 			if (err < 0) {
 				err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
 				goto wraperr;
 				return err;
 			}
 		}
 	}
 #endif
 	/* Assert reset (stop the CPU in the EMI) */
 	err = emi62_set_reset(dev,1);
 	if (err < 0) {
 		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 		goto wraperr;
 	}

 /* FIXME: quick and dirty ifdefs */
 #ifdef SPDIF
 	for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
 		if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
 			err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
 			if (err < 0) {
 				err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 				goto wraperr;
 			}
 		}
 	}
 #else /* MIDI */
 	for (i=0; g_HexMidiFw62[i].type == 0; i++) {
 		if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
 			err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
 			if (err < 0) {
 				err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
 				goto wraperr;
 			}
 		}
 	}
 #endif

 	/* De-assert reset (let the CPU run) */
 	err = emi62_set_reset(dev,0);
 	if (err < 0) {
 		err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 		goto wraperr;
 	}
 	msleep(250);	/* let device settle */

 	kfree(buf);

 	/* return 1 to fail the driver inialization
 	 * and give real driver change to load */
 	return 1;

 wraperr:
 	kfree(buf);
 	dev_err(&dev->dev, "Error\n");
 	return err;
 }

 static __devinitdata 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");

 	info("%s start", __FUNCTION__);

 	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,
 };

 static int __init emi62_init (void)
 {
 	int retval;
 	retval = usb_register (&emi62_driver);
 	if (retval)
 		printk(KERN_ERR "adi-emi: registration failed\n");
 	return retval;
 }

 static void __exit emi62_exit (void)
 {
 	usb_deregister (&emi62_driver);
 }

 module_init(emi62_init);
 module_exit(emi62_exit);

 MODULE_AUTHOR("Tapio Laxström");
 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
 MODULE_LICENSE("GPL");

 /* vi:ai:syntax=c:sw=8:ts=8:tw=80
  */
	/*
	* 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.
	*
	* $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $
	*/
	#include <linux/kernel.h>
	#include <linux/errno.h>
	#include <linux/slab.h>
	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/usb.h>
	#include <linux/delay.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)*/

	/* 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
	# include "emi62_fw_s.h" /* spdif fw */
	#else
	# include "emi62_fw_m.h" /* midi fw */
	#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, 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);
	static int __init emi62_init (void);
	static void __exit emi62_exit (void);


	/* thanks to drivers/usb/serial/keyspan_pda.c code */
	static int emi62_writememory (struct usb_device dev, int address, unsigned char data, int length, __u8 request)
	{
	int result;
	unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);

	if (!buffer) {
	err("emi62: kmalloc(%d) failed.", 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;
	info("%s - %d", __FUNCTION__, reset_bit);

	response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
	if (response < 0) {
	err("emi62: set_reset (%d) failed", reset_bit);
	}
	return response;
	}

	#define FW_LOAD_SIZE 1023

	static int emi62_load_firmware (struct usb_device *dev)
	{
	int err;
	int i;
	int pos = 0; /* Position in hex record */
	__u32 addr; /* Address to write */
	__u8 *buf;

	dev_dbg(&dev->dev, "load_firmware\n");
	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 = emi62_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_emi62_loader[i].type == 0; i++) {
	err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_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 = emi62_set_reset(dev,0);
	if (err < 0) {
	err("%s - error loading firmware: error = %d", __FUNCTION__, err);
	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! */
	do {
	i = 0;
	addr = g_emi62bs[pos].address;

	/* intel hex records are terminated with type 0 element */
	while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
	memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
	i += g_emi62bs[pos].length;
	pos++;
	}
	err = emi62_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 = emi62_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_emi62_loader[i].type == 0; i++) {
	err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_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 = emi62_set_reset(dev,0);
	if (err < 0) {
	err("%s - error loading firmware: error = %d", __FUNCTION__, err);
	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 */

	/* FIXME: quick and dirty ifdefs */
	#ifdef SPDIF
	for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
	if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
	err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
	if (err < 0) {
	err("%s - error loading firmware: error = %d", __FUNCTION__, err);
	goto wraperr;
	}
	}
	}
	#else /* MIDI */
	for (i=0; g_HexMidiFw62[i].type == 0; i++) {
	if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
	err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
	if (err < 0) {
	err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
	goto wraperr;
	return err;
	}
	}
	}
	#endif
	/* Assert reset (stop the CPU in the EMI) */
	err = emi62_set_reset(dev,1);
	if (err < 0) {
	err("%s - error loading firmware: error = %d", __FUNCTION__, err);
	goto wraperr;
	}

	/* FIXME: quick and dirty ifdefs */
	#ifdef SPDIF
	for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
	if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
	err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
	if (err < 0) {
	err("%s - error loading firmware: error = %d", __FUNCTION__, err);
	goto wraperr;
	}
	}
	}
	#else /* MIDI */
	for (i=0; g_HexMidiFw62[i].type == 0; i++) {
	if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
	err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
	if (err < 0) {
	err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
	goto wraperr;
	}
	}
	}
	#endif

	/* De-assert reset (let the CPU run) */
	err = emi62_set_reset(dev,0);
	if (err < 0) {
	err("%s - error loading firmware: error = %d", __FUNCTION__, err);
	goto wraperr;
	}
	msleep(250); /* let device settle */

	kfree(buf);

	/* return 1 to fail the driver inialization
	* and give real driver change to load */
	return 1;

	wraperr:
	kfree(buf);
	dev_err(&dev->dev, "Error\n");
	return err;
	}

	static __devinitdata 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");

	info("%s start", __FUNCTION__);

	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,
	};

	static int __init emi62_init (void)
	{
	int retval;
	retval = usb_register (&emi62_driver);
	if (retval)
	printk(KERN_ERR "adi-emi: registration failed\n");
	return retval;
	}

	static void __exit emi62_exit (void)
	{
	usb_deregister (&emi62_driver);
	}

	module_init(emi62_init);
	module_exit(emi62_exit);

	MODULE_AUTHOR("Tapio Laxström");
	MODULE_DESCRIPTION("Emagic EMI 6\|2m firmware loader.");
	MODULE_LICENSE("GPL");

	/* vi:ai:syntax=c:sw=8:ts=8:tw=80
	*/