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 = kmemdup(data, length, GFP_KERNEL);
67 err("emi62: kmalloc(%d) failed.", 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", __func__, 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", __func__, -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", __func__, 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", __func__, err);
124 /* De-assert reset (let the CPU run) */
125 err = emi62_set_reset(dev,0);
127 err("%s - error loading firmware: error = %d", __func__, err);
130 msleep(250); /* let device settle */
132 /* 2. We upload the FPGA firmware into the EMI
133 * Note: collect up to 1023 (yes!) bytes and send them with
134 * a single request. This is _much_ faster! */
137 addr = g_emi62bs[pos].address;
139 /* intel hex records are terminated with type 0 element */
140 while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
141 memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
142 i += g_emi62bs[pos].length;
145 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
147 err("%s - error loading firmware: error = %d", __func__, err);
152 /* Assert reset (stop the CPU in the EMI) */
153 err = emi62_set_reset(dev,1);
155 err("%s - error loading firmware: error = %d", __func__, err);
159 /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
160 for (i=0; g_emi62_loader[i].type == 0; i++) {
161 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
163 err("%s - error loading firmware: error = %d", __func__, err);
168 /* De-assert reset (let the CPU run) */
169 err = emi62_set_reset(dev,0);
171 err("%s - error loading firmware: error = %d", __func__, err);
174 msleep(250); /* let device settle */
176 /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
178 /* FIXME: quick and dirty ifdefs */
180 for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
181 if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
182 err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
184 err("%s - error loading firmware: error = %d", __func__, err);
190 for (i=0; g_HexMidiFw62[i].type == 0; i++) {
191 if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
192 err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
194 err("%s - error loading firmware: error = %d\n", __func__, err);
201 /* Assert reset (stop the CPU in the EMI) */
202 err = emi62_set_reset(dev,1);
204 err("%s - error loading firmware: error = %d", __func__, err);
208 /* FIXME: quick and dirty ifdefs */
210 for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
211 if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
212 err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
214 err("%s - error loading firmware: error = %d", __func__, err);
220 for (i=0; g_HexMidiFw62[i].type == 0; i++) {
221 if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
222 err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
224 err("%s - error loading firmware: error = %d\n", __func__, err);
231 /* De-assert reset (let the CPU run) */
232 err = emi62_set_reset(dev,0);
234 err("%s - error loading firmware: error = %d", __func__, err);
237 msleep(250); /* let device settle */
241 /* return 1 to fail the driver inialization
242 * and give real driver change to load */
247 dev_err(&dev->dev, "Error\n");
251 static __devinitdata struct usb_device_id id_table [] = {
252 { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
253 { } /* Terminating entry */
256 MODULE_DEVICE_TABLE (usb, id_table);
258 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
260 struct usb_device *dev = interface_to_usbdev(intf);
261 dev_dbg(&intf->dev, "emi62_probe\n");
263 info("%s start", __func__);
265 emi62_load_firmware(dev);
267 /* do not return the driver context, let real audio driver do that */
271 static void emi62_disconnect(struct usb_interface *intf)
275 static struct usb_driver emi62_driver = {
276 .name = "emi62 - firmware loader",
277 .probe = emi62_probe,
278 .disconnect = emi62_disconnect,
279 .id_table = id_table,
282 static int __init emi62_init (void)
285 retval = usb_register (&emi62_driver);
287 printk(KERN_ERR "adi-emi: registration failed\n");
291 static void __exit emi62_exit (void)
293 usb_deregister (&emi62_driver);
296 module_init(emi62_init);
297 module_exit(emi62_exit);
299 MODULE_AUTHOR("Tapio Laxström");
300 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
301 MODULE_LICENSE("GPL");
303 /* vi:ai:syntax=c:sw=8:ts=8:tw=80