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>
19 #define MAX_INTEL_HEX_RECORD_LENGTH 16
20 typedef struct _INTEL_HEX_RECORD
25 __u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
26 } INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;
28 /* include firmware (variables)*/
30 /* FIXME: This is quick and dirty solution! */
31 #define SPDIF /* if you want SPDIF comment next line */
32 //#undef SPDIF /* if you want MIDI uncomment this line */
35 # include "emi62_fw_s.h" /* spdif fw */
37 # include "emi62_fw_m.h" /* midi fw */
40 #define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
41 #define EMI62_PRODUCT_ID 0x0110 /* EMI 6|2m without firmware */
43 #define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
44 #define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
45 #define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
46 #define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
47 #define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
48 #define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
50 static int emi62_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest);
51 static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
52 static int emi62_load_firmware (struct usb_device *dev);
53 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
54 static void emi62_disconnect(struct usb_interface *intf);
55 static int __init emi62_init (void);
56 static void __exit emi62_exit (void);
59 /* thanks to drivers/usb/serial/keyspan_pda.c code */
60 static int emi62_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
63 unsigned char *buffer = kmalloc (length, GFP_KERNEL);
66 err("emi62: kmalloc(%d) failed.", length);
69 memcpy (buffer, data, length);
70 /* Note: usb_control_msg returns negative value on error or length of the
71 * data that was written! */
72 result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
77 /* thanks to drivers/usb/serial/keyspan_pda.c code */
78 static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
81 info("%s - %d", __FUNCTION__, reset_bit);
83 response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
85 err("emi62: set_reset (%d) failed", reset_bit);
90 #define FW_LOAD_SIZE 1023
92 static int emi62_load_firmware (struct usb_device *dev)
96 int pos = 0; /* Position in hex record */
97 __u32 addr; /* Address to write */
100 dev_dbg(&dev->dev, "load_firmware\n");
101 buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
103 err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM);
108 /* Assert reset (stop the CPU in the EMI) */
109 err = emi62_set_reset(dev,1);
111 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
115 /* 1. We need to put the loader for the FPGA into the EZ-USB */
116 for (i=0; g_emi62_loader[i].type == 0; i++) {
117 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
119 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
124 /* De-assert reset (let the CPU run) */
125 err = emi62_set_reset(dev,0);
127 /* 2. We upload the FPGA firmware into the EMI
128 * Note: collect up to 1023 (yes!) bytes and send them with
129 * a single request. This is _much_ faster! */
132 addr = g_emi62bs[pos].address;
134 /* intel hex records are terminated with type 0 element */
135 while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
136 memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
137 i += g_emi62bs[pos].length;
140 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
142 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
147 /* Assert reset (stop the CPU in the EMI) */
148 err = emi62_set_reset(dev,1);
150 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
154 /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
155 for (i=0; g_emi62_loader[i].type == 0; i++) {
156 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
158 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
163 /* De-assert reset (let the CPU run) */
164 err = emi62_set_reset(dev,0);
166 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
170 /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
172 /* FIXME: quick and dirty ifdefs */
174 for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
175 if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
176 err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
178 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
184 for (i=0; g_HexMidiFw62[i].type == 0; i++) {
185 if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
186 err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
188 err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
195 /* Assert reset (stop the CPU in the EMI) */
196 err = emi62_set_reset(dev,1);
198 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
202 /* FIXME: quick and dirty ifdefs */
204 for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
205 if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
206 err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
208 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
214 for (i=0; g_HexMidiFw62[i].type == 0; i++) {
215 if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
216 err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
218 err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
225 /* De-assert reset (let the CPU run) */
226 err = emi62_set_reset(dev,0);
228 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
234 /* return 1 to fail the driver inialization
235 * and give real driver change to load */
240 dev_err(&dev->dev, "Error\n");
244 static __devinitdata struct usb_device_id id_table [] = {
245 { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
246 { } /* Terminating entry */
249 MODULE_DEVICE_TABLE (usb, id_table);
251 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
253 struct usb_device *dev = interface_to_usbdev(intf);
254 dev_dbg(&intf->dev, "emi62_probe\n");
256 info("%s start", __FUNCTION__);
258 emi62_load_firmware(dev);
260 /* do not return the driver context, let real audio driver do that */
264 static void emi62_disconnect(struct usb_interface *intf)
268 static struct usb_driver emi62_driver = {
269 .owner = THIS_MODULE,
270 .name = "emi62 - firmware loader",
271 .probe = emi62_probe,
272 .disconnect = emi62_disconnect,
273 .id_table = id_table,
276 static int __init emi62_init (void)
279 retval = usb_register (&emi62_driver);
281 printk(KERN_ERR "adi-emi: registration failed\n");
285 static void __exit emi62_exit (void)
287 usb_deregister (&emi62_driver);
290 module_init(emi62_init);
291 module_exit(emi62_exit);
293 MODULE_AUTHOR("tapio laxström");
294 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
295 MODULE_LICENSE("GPL");
297 /* vi:ai:syntax=c:sw=8:ts=8:tw=80