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 #include <linux/kernel.h>
11 #include <linux/errno.h>
12 #include <linux/slab.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/usb.h>
16 #include <linux/delay.h>
17 #include <linux/firmware.h>
18 #include <linux/ihex.h>
20 /* include firmware (variables)*/
22 /* FIXME: This is quick and dirty solution! */
23 #define SPDIF /* if you want SPDIF comment next line */
24 //#undef SPDIF /* if you want MIDI uncomment this line */
27 #define FIRMWARE_FW "emi62/spdif.fw"
29 #define FIRMWARE_FW "emi62/midi.fw"
32 #define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
33 #define EMI62_PRODUCT_ID 0x0110 /* EMI 6|2m without firmware */
35 #define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
36 #define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
37 #define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
38 #define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
39 #define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
40 #define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
42 static int emi62_writememory(struct usb_device *dev, int address,
43 const unsigned char *data, int length,
45 static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
46 static int emi62_load_firmware (struct usb_device *dev);
47 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
48 static void emi62_disconnect(struct usb_interface *intf);
49 static int __init emi62_init (void);
50 static void __exit emi62_exit (void);
53 /* thanks to drivers/usb/serial/keyspan_pda.c code */
54 static int emi62_writememory(struct usb_device *dev, int address,
55 const unsigned char *data, int length,
59 unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);
62 err("emi62: kmalloc(%d) failed.", length);
65 /* Note: usb_control_msg returns negative value on error or length of the
66 * data that was written! */
67 result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
72 /* thanks to drivers/usb/serial/keyspan_pda.c code */
73 static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
76 dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);
78 response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
80 err("emi62: set_reset (%d) failed", reset_bit);
85 #define FW_LOAD_SIZE 1023
87 static int emi62_load_firmware (struct usb_device *dev)
89 const struct firmware *loader_fw = NULL;
90 const struct firmware *bitstream_fw = NULL;
91 const struct firmware *firmware_fw = NULL;
92 const struct ihex_binrec *rec;
95 __u32 addr; /* Address to write */
98 dev_dbg(&dev->dev, "load_firmware\n");
99 buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
101 err( "%s - error loading firmware: error = %d", __func__, -ENOMEM);
106 err = request_ihex_firmware(&loader_fw, "emi62/loader.fw", &dev->dev);
110 err = request_ihex_firmware(&bitstream_fw, "emi62/bitstream.fw",
115 err = request_ihex_firmware(&firmware_fw, FIRMWARE_FW, &dev->dev);
118 err( "%s - request_firmware() failed", __func__);
122 /* Assert reset (stop the CPU in the EMI) */
123 err = emi62_set_reset(dev,1);
125 err("%s - error loading firmware: error = %d", __func__, err);
129 rec = (const struct ihex_binrec *)loader_fw->data;
131 /* 1. We need to put the loader for the FPGA into the EZ-USB */
133 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
134 rec->data, be16_to_cpu(rec->len),
135 ANCHOR_LOAD_INTERNAL);
137 err("%s - error loading firmware: error = %d", __func__, err);
140 rec = ihex_next_binrec(rec);
143 /* De-assert reset (let the CPU run) */
144 err = emi62_set_reset(dev,0);
146 err("%s - error loading firmware: error = %d", __func__, err);
149 msleep(250); /* let device settle */
151 /* 2. We upload the FPGA firmware into the EMI
152 * Note: collect up to 1023 (yes!) bytes and send them with
153 * a single request. This is _much_ faster! */
154 rec = (const struct ihex_binrec *)bitstream_fw->data;
157 addr = be32_to_cpu(rec->addr);
159 /* intel hex records are terminated with type 0 element */
160 while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {
161 memcpy(buf + i, rec->data, be16_to_cpu(rec->len));
162 i += be16_to_cpu(rec->len);
163 rec = ihex_next_binrec(rec);
165 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
167 err("%s - error loading firmware: error = %d", __func__, err);
172 /* Assert reset (stop the CPU in the EMI) */
173 err = emi62_set_reset(dev,1);
175 err("%s - error loading firmware: error = %d", __func__, err);
179 /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
180 for (rec = (const struct ihex_binrec *)loader_fw->data;
181 rec; rec = ihex_next_binrec(rec)) {
182 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
183 rec->data, be16_to_cpu(rec->len),
184 ANCHOR_LOAD_INTERNAL);
186 err("%s - error loading firmware: error = %d", __func__, err);
191 /* De-assert reset (let the CPU run) */
192 err = emi62_set_reset(dev,0);
194 err("%s - error loading firmware: error = %d", __func__, err);
197 msleep(250); /* let device settle */
199 /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
201 for (rec = (const struct ihex_binrec *)firmware_fw->data;
202 rec; rec = ihex_next_binrec(rec)) {
203 if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {
204 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
205 rec->data, be16_to_cpu(rec->len),
206 ANCHOR_LOAD_EXTERNAL);
208 err("%s - error loading firmware: error = %d", __func__, err);
214 /* Assert reset (stop the CPU in the EMI) */
215 err = emi62_set_reset(dev,1);
217 err("%s - error loading firmware: error = %d", __func__, err);
221 for (rec = (const struct ihex_binrec *)firmware_fw->data;
222 rec; rec = ihex_next_binrec(rec)) {
223 if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {
224 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
225 rec->data, be16_to_cpu(rec->len),
226 ANCHOR_LOAD_EXTERNAL);
228 err("%s - error loading firmware: error = %d", __func__, err);
234 /* De-assert reset (let the CPU run) */
235 err = emi62_set_reset(dev,0);
237 err("%s - error loading firmware: error = %d", __func__, err);
240 msleep(250); /* let device settle */
242 release_firmware(loader_fw);
243 release_firmware(bitstream_fw);
244 release_firmware(firmware_fw);
248 /* return 1 to fail the driver inialization
249 * and give real driver change to load */
253 release_firmware(loader_fw);
254 release_firmware(bitstream_fw);
255 release_firmware(firmware_fw);
258 dev_err(&dev->dev, "Error\n");
262 static __devinitdata struct usb_device_id id_table [] = {
263 { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
264 { } /* Terminating entry */
267 MODULE_DEVICE_TABLE (usb, id_table);
269 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
271 struct usb_device *dev = interface_to_usbdev(intf);
272 dev_dbg(&intf->dev, "emi62_probe\n");
274 dev_info(&intf->dev, "%s start\n", __func__);
276 emi62_load_firmware(dev);
278 /* do not return the driver context, let real audio driver do that */
282 static void emi62_disconnect(struct usb_interface *intf)
286 static struct usb_driver emi62_driver = {
287 .name = "emi62 - firmware loader",
288 .probe = emi62_probe,
289 .disconnect = emi62_disconnect,
290 .id_table = id_table,
293 static int __init emi62_init (void)
296 retval = usb_register (&emi62_driver);
298 printk(KERN_ERR "adi-emi: registration failed\n");
302 static void __exit emi62_exit (void)
304 usb_deregister (&emi62_driver);
307 module_init(emi62_init);
308 module_exit(emi62_exit);
310 MODULE_AUTHOR("Tapio Laxström");
311 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
312 MODULE_LICENSE("GPL");
314 MODULE_FIRMWARE("emi62/loader.fw");
315 MODULE_FIRMWARE("emi62/bitstream.fw");
316 MODULE_FIRMWARE(FIRMWARE_FW);
317 /* vi:ai:syntax=c:sw=8:ts=8:tw=80