[mirror_ubuntu-zesty-kernel.git] / drivers / usb / misc / emi62.c

/* 
 * 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 "emi62/spdif.fw"
#else
#define FIRMWARE_FW "emi62/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,
			     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 = request_ihex_firmware(&loader_fw, "emi62/loader.fw", &dev->dev);
	if (err)
		goto nofw;

	err = request_ihex_firmware(&bitstream_fw, "emi62/bitstream.fw",
				    &dev->dev);
	if (err)
		goto nofw;

	err = request_ihex_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");

MODULE_FIRMWARE("emi62/loader.fw");
MODULE_FIRMWARE("emi62/bitstream.fw");
MODULE_FIRMWARE(FIRMWARE_FW);
/* vi:ai:syntax=c:sw=8:ts=8:tw=80
 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Emagic EMI 2\|6 usb audio interface firmware loader.
	3	* Copyright (C) 2002
96de0e25	4	* Tapio Laxström (tapio.laxstrom@iptime.fi)
1da177e4 LT	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License, as published by
	8	* the Free Software Foundation, version 2.
1da177e4 LT	9	*/
	10	#include <linux/kernel.h>
	11	#include <linux/errno.h>
	12	#include <linux/slab.h>
1da177e4 LT	13	#include <linux/module.h>
1da177e4 LT	14	#include <linux/usb.h>
16c23f7d	15	#include <linux/delay.h>
b8e24bfa DW	16	#include <linux/firmware.h>
b8e24bfa DW	17	#include <linux/ihex.h>
1da177e4 LT	18
	19	/* include firmware (variables)*/
	20
	21	/* FIXME: This is quick and dirty solution! */
	22	#define SPDIF /* if you want SPDIF comment next line */
	23	//#undef SPDIF /* if you want MIDI uncomment this line */
	24
	25	#ifdef SPDIF
b8e24bfa	26	#define FIRMWARE_FW "emi62/spdif.fw"
1da177e4	27	#else
b8e24bfa	28	#define FIRMWARE_FW "emi62/midi.fw"
1da177e4 LT	29	#endif
	30
	31	#define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
	32	#define EMI62_PRODUCT_ID 0x0110 /* EMI 6\|2m without firmware */
	33
	34	#define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
	35	#define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
	36	#define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
	37	#define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
	38	#define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
	39	#define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
	40
b8e24bfa DW	41	static int emi62_writememory(struct usb_device *dev, int address,
	42	const unsigned char *data, int length,
	43	__u8 bRequest);
1da177e4 LT	44	static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
	45	static int emi62_load_firmware (struct usb_device *dev);
	46	static int emi62_probe(struct usb_interface intf, const struct usb_device_id id);
	47	static void emi62_disconnect(struct usb_interface *intf);
1da177e4 LT	48
1da177e4 LT	49	/* thanks to drivers/usb/serial/keyspan_pda.c code */
b8e24bfa DW	50	static int emi62_writememory(struct usb_device *dev, int address,
	51	const unsigned char *data, int length,
	52	__u8 request)
1da177e4 LT	53	{
1da177e4 LT	54	int result;
5d7efe5b	55	unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);
1da177e4 LT	56
1da177e4 LT	57	if (!buffer) {
e9a527da	58	dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);
1da177e4 LT	59	return -ENOMEM;
1da177e4 LT	60	}
1da177e4 LT	61	/* Note: usb_control_msg returns negative value on error or length of the
	62	* data that was written! */
	63	result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
	64	kfree (buffer);
	65	return result;
	66	}
	67
	68	/* thanks to drivers/usb/serial/keyspan_pda.c code */
	69	static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
	70	{
	71	int response;
1b29a375	72	dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);
1da177e4 LT	73
1da177e4 LT	74	response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
e9a527da GKH	75	if (response < 0)
e9a527da GKH	76	dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);
1da177e4 LT	77	return response;
	78	}
	79
	80	#define FW_LOAD_SIZE 1023
	81
	82	static int emi62_load_firmware (struct usb_device *dev)
	83	{
b8e24bfa DW	84	const struct firmware *loader_fw = NULL;
	85	const struct firmware *bitstream_fw = NULL;
	86	const struct firmware *firmware_fw = NULL;
	87	const struct ihex_binrec *rec;
e9a527da	88	int err = -ENOMEM;
1da177e4	89	int i;
1da177e4 LT	90	__u32 addr; /* Address to write */
	91	__u8 *buf;
	92
	93	dev_dbg(&dev->dev, "load_firmware\n");
	94	buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
e9a527da	95	if (!buf)
1da177e4	96	goto wraperr;
1da177e4	97
b8e24bfa DW	98	err = request_ihex_firmware(&loader_fw, "emi62/loader.fw", &dev->dev);
	99	if (err)
	100	goto nofw;
	101
	102	err = request_ihex_firmware(&bitstream_fw, "emi62/bitstream.fw",
	103	&dev->dev);
	104	if (err)
	105	goto nofw;
	106
	107	err = request_ihex_firmware(&firmware_fw, FIRMWARE_FW, &dev->dev);
	108	if (err) {
	109	nofw:
b8e24bfa DW	110	goto wraperr;
	111	}
	112
1da177e4 LT	113	/* Assert reset (stop the CPU in the EMI) */
1da177e4 LT	114	err = emi62_set_reset(dev,1);
e9a527da	115	if (err < 0)
1da177e4	116	goto wraperr;
1da177e4	117
b8e24bfa DW	118	rec = (const struct ihex_binrec *)loader_fw->data;
b8e24bfa DW	119
1da177e4	120	/* 1. We need to put the loader for the FPGA into the EZ-USB */
b8e24bfa DW	121	while (rec) {
	122	err = emi62_writememory(dev, be32_to_cpu(rec->addr),
	123	rec->data, be16_to_cpu(rec->len),
	124	ANCHOR_LOAD_INTERNAL);
e9a527da	125	if (err < 0)
1da177e4	126	goto wraperr;
b8e24bfa	127	rec = ihex_next_binrec(rec);
1da177e4 LT	128	}
	129
	130	/* De-assert reset (let the CPU run) */
	131	err = emi62_set_reset(dev,0);
e9a527da	132	if (err < 0)
5919a43b	133	goto wraperr;
16c23f7d	134	msleep(250); /* let device settle */
1da177e4 LT	135
	136	/* 2. We upload the FPGA firmware into the EMI
	137	* Note: collect up to 1023 (yes!) bytes and send them with
	138	* a single request. This is _much_ faster! */
b8e24bfa	139	rec = (const struct ihex_binrec *)bitstream_fw->data;
1da177e4 LT	140	do {
1da177e4 LT	141	i = 0;
b8e24bfa	142	addr = be32_to_cpu(rec->addr);
1da177e4 LT	143
1da177e4 LT	144	/* intel hex records are terminated with type 0 element */
b8e24bfa DW	145	while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {
	146	memcpy(buf + i, rec->data, be16_to_cpu(rec->len));
	147	i += be16_to_cpu(rec->len);
	148	rec = ihex_next_binrec(rec);
1da177e4 LT	149	}
1da177e4 LT	150	err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
e9a527da	151	if (err < 0)
1da177e4	152	goto wraperr;
ac06c067	153	} while (rec);
1da177e4 LT	154
	155	/* Assert reset (stop the CPU in the EMI) */
	156	err = emi62_set_reset(dev,1);
e9a527da	157	if (err < 0)
1da177e4	158	goto wraperr;
1da177e4 LT	159
1da177e4 LT	160	/* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
b8e24bfa DW	161	for (rec = (const struct ihex_binrec *)loader_fw->data;
	162	rec; rec = ihex_next_binrec(rec)) {
	163	err = emi62_writememory(dev, be32_to_cpu(rec->addr),
	164	rec->data, be16_to_cpu(rec->len),
	165	ANCHOR_LOAD_INTERNAL);
e9a527da	166	if (err < 0)
1da177e4	167	goto wraperr;
1da177e4 LT	168	}
	169
	170	/* De-assert reset (let the CPU run) */
	171	err = emi62_set_reset(dev,0);
e9a527da	172	if (err < 0)
1da177e4	173	goto wraperr;
16c23f7d	174	msleep(250); /* let device settle */
1da177e4 LT	175
	176	/* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
	177
b8e24bfa DW	178	for (rec = (const struct ihex_binrec *)firmware_fw->data;
	179	rec; rec = ihex_next_binrec(rec)) {
	180	if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {
	181	err = emi62_writememory(dev, be32_to_cpu(rec->addr),
	182	rec->data, be16_to_cpu(rec->len),
	183	ANCHOR_LOAD_EXTERNAL);
e9a527da	184	if (err < 0)
1da177e4	185	goto wraperr;
1da177e4 LT	186	}
1da177e4 LT	187	}
b8e24bfa	188
1da177e4 LT	189	/* Assert reset (stop the CPU in the EMI) */
1da177e4 LT	190	err = emi62_set_reset(dev,1);
e9a527da	191	if (err < 0)
1da177e4	192	goto wraperr;
1da177e4	193
b8e24bfa DW	194	for (rec = (const struct ihex_binrec *)firmware_fw->data;
	195	rec; rec = ihex_next_binrec(rec)) {
	196	if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {
	197	err = emi62_writememory(dev, be32_to_cpu(rec->addr),
	198	rec->data, be16_to_cpu(rec->len),
	199	ANCHOR_LOAD_EXTERNAL);
e9a527da	200	if (err < 0)
1da177e4	201	goto wraperr;
1da177e4 LT	202	}
1da177e4 LT	203	}
b8e24bfa	204
1da177e4 LT	205	/* De-assert reset (let the CPU run) */
1da177e4 LT	206	err = emi62_set_reset(dev,0);
e9a527da	207	if (err < 0)
1da177e4	208	goto wraperr;
16c23f7d	209	msleep(250); /* let device settle */
1da177e4	210
b8e24bfa DW	211	release_firmware(loader_fw);
	212	release_firmware(bitstream_fw);
	213	release_firmware(firmware_fw);
	214
1da177e4 LT	215	kfree(buf);
	216
	217	/* return 1 to fail the driver inialization
	218	* and give real driver change to load */
	219	return 1;
	220
	221	wraperr:
e9a527da GKH	222	if (err < 0)
	223	dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",
	224	__func__, err);
b8e24bfa DW	225	release_firmware(loader_fw);
	226	release_firmware(bitstream_fw);
	227	release_firmware(firmware_fw);
	228
1da177e4 LT	229	kfree(buf);
	230	dev_err(&dev->dev, "Error\n");
	231	return err;
	232	}
	233
83957df2	234	static const struct usb_device_id id_table[] = {
1da177e4 LT	235	{ USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
	236	{ } /* Terminating entry */
	237	};
	238
	239	MODULE_DEVICE_TABLE (usb, id_table);
	240
	241	static int emi62_probe(struct usb_interface intf, const struct usb_device_id id)
	242	{
	243	struct usb_device *dev = interface_to_usbdev(intf);
	244	dev_dbg(&intf->dev, "emi62_probe\n");
	245
1b29a375	246	dev_info(&intf->dev, "%s start\n", __func__);
1da177e4 LT	247
	248	emi62_load_firmware(dev);
	249
	250	/* do not return the driver context, let real audio driver do that */
	251	return -EIO;
	252	}
	253
	254	static void emi62_disconnect(struct usb_interface *intf)
	255	{
	256	}
	257
	258	static struct usb_driver emi62_driver = {
1da177e4 LT	259	.name = "emi62 - firmware loader",
	260	.probe = emi62_probe,
	261	.disconnect = emi62_disconnect,
	262	.id_table = id_table,
	263	};
	264
65db4305	265	module_usb_driver(emi62_driver);
1da177e4	266
96de0e25	267	MODULE_AUTHOR("Tapio Laxström");
1da177e4 LT	268	MODULE_DESCRIPTION("Emagic EMI 6\|2m firmware loader.");
	269	MODULE_LICENSE("GPL");
	270
b8e24bfa DW	271	MODULE_FIRMWARE("emi62/loader.fw");
	272	MODULE_FIRMWARE("emi62/bitstream.fw");
	273	MODULE_FIRMWARE(FIRMWARE_FW);
1da177e4 LT	274	/* vi:ai:syntax=c:sw=8:ts=8:tw=80
1da177e4 LT	275	*/