2 * Emagic EMI 2|6 usb audio interface firmware loader.
4 * Tapio Laxström (tapio.laxstrom@iptime.fi)
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.
10 * $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/slab.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/usb.h>
18 #include <linux/delay.h>
20 #define MAX_INTEL_HEX_RECORD_LENGTH 16
21 typedef struct _INTEL_HEX_RECORD
26 __u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
27 } INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;
29 /* include firmware (variables)*/
31 /* FIXME: This is quick and dirty solution! */
32 #define SPDIF /* if you want SPDIF comment next line */
33 //#undef SPDIF /* if you want MIDI uncomment this line */
36 # include "emi62_fw_s.h" /* spdif fw */
38 # include "emi62_fw_m.h" /* midi fw */
41 #define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
42 #define EMI62_PRODUCT_ID 0x0110 /* EMI 6|2m without firmware */
44 #define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
45 #define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
46 #define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
47 #define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
48 #define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
49 #define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
51 static int emi62_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest);
52 static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
53 static int emi62_load_firmware (struct usb_device *dev);
54 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
55 static void emi62_disconnect(struct usb_interface *intf);
56 static int __init emi62_init (void);
57 static void __exit emi62_exit (void);
60 /* thanks to drivers/usb/serial/keyspan_pda.c code */
61 static int emi62_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
64 unsigned char *buffer = kmalloc (length, GFP_KERNEL);
67 err("emi62: kmalloc(%d) failed.", length);
70 memcpy (buffer, data, length);
71 /* Note: usb_control_msg returns negative value on error or length of the
72 * data that was written! */
73 result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
78 /* thanks to drivers/usb/serial/keyspan_pda.c code */
79 static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
82 info("%s - %d", __FUNCTION__, reset_bit);
84 response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
86 err("emi62: set_reset (%d) failed", reset_bit);
91 #define FW_LOAD_SIZE 1023
93 static int emi62_load_firmware (struct usb_device *dev)
97 int pos = 0; /* Position in hex record */
98 __u32 addr; /* Address to write */
101 dev_dbg(&dev->dev, "load_firmware\n");
102 buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
104 err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM);
109 /* Assert reset (stop the CPU in the EMI) */
110 err = emi62_set_reset(dev,1);
112 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
116 /* 1. We need to put the loader for the FPGA into the EZ-USB */
117 for (i=0; g_emi62_loader[i].type == 0; i++) {
118 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
120 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
125 /* De-assert reset (let the CPU run) */
126 err = emi62_set_reset(dev,0);
127 msleep(250); /* let device settle */
129 /* 2. We upload the FPGA firmware into the EMI
130 * Note: collect up to 1023 (yes!) bytes and send them with
131 * a single request. This is _much_ faster! */
134 addr = g_emi62bs[pos].address;
136 /* intel hex records are terminated with type 0 element */
137 while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
138 memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
139 i += g_emi62bs[pos].length;
142 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
144 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
149 /* Assert reset (stop the CPU in the EMI) */
150 err = emi62_set_reset(dev,1);
152 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
156 /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
157 for (i=0; g_emi62_loader[i].type == 0; i++) {
158 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
160 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
165 /* De-assert reset (let the CPU run) */
166 err = emi62_set_reset(dev,0);
168 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
171 msleep(250); /* let device settle */
173 /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
175 /* FIXME: quick and dirty ifdefs */
177 for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
178 if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
179 err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
181 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
187 for (i=0; g_HexMidiFw62[i].type == 0; i++) {
188 if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
189 err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
191 err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
198 /* Assert reset (stop the CPU in the EMI) */
199 err = emi62_set_reset(dev,1);
201 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
205 /* FIXME: quick and dirty ifdefs */
207 for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
208 if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
209 err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
211 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
217 for (i=0; g_HexMidiFw62[i].type == 0; i++) {
218 if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
219 err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
221 err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
228 /* De-assert reset (let the CPU run) */
229 err = emi62_set_reset(dev,0);
231 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
234 msleep(250); /* let device settle */
238 /* return 1 to fail the driver inialization
239 * and give real driver change to load */
244 dev_err(&dev->dev, "Error\n");
248 static __devinitdata struct usb_device_id id_table [] = {
249 { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
250 { } /* Terminating entry */
253 MODULE_DEVICE_TABLE (usb, id_table);
255 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
257 struct usb_device *dev = interface_to_usbdev(intf);
258 dev_dbg(&intf->dev, "emi62_probe\n");
260 info("%s start", __FUNCTION__);
262 emi62_load_firmware(dev);
264 /* do not return the driver context, let real audio driver do that */
268 static void emi62_disconnect(struct usb_interface *intf)
272 static struct usb_driver emi62_driver = {
273 .name = "emi62 - firmware loader",
274 .probe = emi62_probe,
275 .disconnect = emi62_disconnect,
276 .id_table = id_table,
279 static int __init emi62_init (void)
282 retval = usb_register (&emi62_driver);
284 printk(KERN_ERR "adi-emi: registration failed\n");
288 static void __exit emi62_exit (void)
290 usb_deregister (&emi62_driver);
293 module_init(emi62_init);
294 module_exit(emi62_exit);
296 MODULE_AUTHOR("tapio laxström");
297 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
298 MODULE_LICENSE("GPL");
300 /* vi:ai:syntax=c:sw=8:ts=8:tw=80