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 * emi26.c,v 1.13 2002/03/08 13:10:26 tapio Exp
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/slab.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/usb.h>
18 #include <linux/delay.h>
19 #include <linux/firmware.h>
20 #include <linux/ihex.h>
22 #define EMI26_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
23 #define EMI26_PRODUCT_ID 0x0100 /* EMI 2|6 without firmware */
24 #define EMI26B_PRODUCT_ID 0x0102 /* EMI 2|6 without firmware */
26 #define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
27 #define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
28 #define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
29 #define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
30 #define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
31 #define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
33 static int emi26_writememory( struct usb_device *dev, int address,
34 const unsigned char *data, int length,
36 static int emi26_set_reset(struct usb_device *dev, unsigned char reset_bit);
37 static int emi26_load_firmware (struct usb_device *dev);
38 static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id);
39 static void emi26_disconnect(struct usb_interface *intf);
40 static int __init emi26_init (void);
41 static void __exit emi26_exit (void);
44 /* thanks to drivers/usb/serial/keyspan_pda.c code */
45 static int emi26_writememory (struct usb_device *dev, int address,
46 const unsigned char *data, int length,
50 unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);
53 err("emi26: kmalloc(%d) failed.", length);
56 /* Note: usb_control_msg returns negative value on error or length of the
57 * data that was written! */
58 result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
63 /* thanks to drivers/usb/serial/keyspan_pda.c code */
64 static int emi26_set_reset (struct usb_device *dev, unsigned char reset_bit)
67 info("%s - %d", __func__, reset_bit);
68 /* printk(KERN_DEBUG "%s - %d", __func__, reset_bit); */
69 response = emi26_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
71 err("emi26: set_reset (%d) failed", reset_bit);
76 #define FW_LOAD_SIZE 1023
78 static int emi26_load_firmware (struct usb_device *dev)
80 const struct firmware *loader_fw = NULL;
81 const struct firmware *bitstream_fw = NULL;
82 const struct firmware *firmware_fw = NULL;
83 const struct ihex_binrec *rec;
86 __u32 addr; /* Address to write */
89 buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
91 err( "%s - error loading firmware: error = %d", __func__, -ENOMEM);
96 err = request_ihex_firmware(&loader_fw, "emi26/loader.fw", &dev->dev);
100 err = request_ihex_firmware(&bitstream_fw, "emi26/bitstream.fw",
105 err = request_ihex_firmware(&firmware_fw, "emi26/firmware.fw",
109 err( "%s - request_firmware() failed", __func__);
113 /* Assert reset (stop the CPU in the EMI) */
114 err = emi26_set_reset(dev,1);
116 err( "%s - error loading firmware: error = %d", __func__, err);
120 rec = (const struct ihex_binrec *)loader_fw->data;
121 /* 1. We need to put the loader for the FPGA into the EZ-USB */
123 err = emi26_writememory(dev, be32_to_cpu(rec->addr),
124 rec->data, be16_to_cpu(rec->len),
125 ANCHOR_LOAD_INTERNAL);
127 err("%s - error loading firmware: error = %d", __func__, err);
130 rec = ihex_next_binrec(rec);
133 /* De-assert reset (let the CPU run) */
134 err = emi26_set_reset(dev,0);
136 err("%s - error loading firmware: error = %d", __func__, err);
139 msleep(250); /* let device settle */
141 /* 2. We upload the FPGA firmware into the EMI
142 * Note: collect up to 1023 (yes!) bytes and send them with
143 * a single request. This is _much_ faster! */
144 rec = (const struct ihex_binrec *)bitstream_fw->data;
147 addr = be32_to_cpu(rec->addr);
149 /* intel hex records are terminated with type 0 element */
150 while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {
151 memcpy(buf + i, rec->data, be16_to_cpu(rec->len));
152 i += be16_to_cpu(rec->len);
153 rec = ihex_next_binrec(rec);
155 err = emi26_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
157 err("%s - error loading firmware: error = %d", __func__, err);
162 /* Assert reset (stop the CPU in the EMI) */
163 err = emi26_set_reset(dev,1);
165 err("%s - error loading firmware: error = %d", __func__, err);
169 /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
170 for (rec = (const struct ihex_binrec *)loader_fw->data;
171 rec; rec = ihex_next_binrec(rec)) {
172 err = emi26_writememory(dev, be32_to_cpu(rec->addr),
173 rec->data, be16_to_cpu(rec->len),
174 ANCHOR_LOAD_INTERNAL);
176 err("%s - error loading firmware: error = %d", __func__, err);
180 msleep(250); /* let device settle */
182 /* De-assert reset (let the CPU run) */
183 err = emi26_set_reset(dev,0);
185 err("%s - error loading firmware: error = %d", __func__, err);
189 /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
191 for (rec = (const struct ihex_binrec *)firmware_fw->data;
192 rec; rec = ihex_next_binrec(rec)) {
193 if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {
194 err = emi26_writememory(dev, be32_to_cpu(rec->addr),
195 rec->data, be16_to_cpu(rec->len),
196 ANCHOR_LOAD_EXTERNAL);
198 err("%s - error loading firmware: error = %d", __func__, err);
204 /* Assert reset (stop the CPU in the EMI) */
205 err = emi26_set_reset(dev,1);
207 err("%s - error loading firmware: error = %d", __func__, err);
211 for (rec = (const struct ihex_binrec *)firmware_fw->data;
212 rec; rec = ihex_next_binrec(rec)) {
213 if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {
214 err = emi26_writememory(dev, be32_to_cpu(rec->addr),
215 rec->data, be16_to_cpu(rec->len),
216 ANCHOR_LOAD_INTERNAL);
218 err("%s - error loading firmware: error = %d", __func__, err);
224 /* De-assert reset (let the CPU run) */
225 err = emi26_set_reset(dev,0);
227 err("%s - error loading firmware: error = %d", __func__, err);
230 msleep(250); /* let device settle */
232 /* return 1 to fail the driver inialization
233 * and give real driver change to load */
237 release_firmware(loader_fw);
238 release_firmware(bitstream_fw);
239 release_firmware(firmware_fw);
245 static struct usb_device_id id_table [] = {
246 { USB_DEVICE(EMI26_VENDOR_ID, EMI26_PRODUCT_ID) },
247 { USB_DEVICE(EMI26_VENDOR_ID, EMI26B_PRODUCT_ID) },
248 { } /* Terminating entry */
251 MODULE_DEVICE_TABLE (usb, id_table);
253 static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id)
255 struct usb_device *dev = interface_to_usbdev(intf);
257 info("%s start", __func__);
259 emi26_load_firmware(dev);
261 /* do not return the driver context, let real audio driver do that */
265 static void emi26_disconnect(struct usb_interface *intf)
269 static struct usb_driver emi26_driver = {
270 .name = "emi26 - firmware loader",
271 .probe = emi26_probe,
272 .disconnect = emi26_disconnect,
273 .id_table = id_table,
276 static int __init emi26_init (void)
278 return usb_register(&emi26_driver);
281 static void __exit emi26_exit (void)
283 usb_deregister (&emi26_driver);
286 module_init(emi26_init);
287 module_exit(emi26_exit);
289 MODULE_AUTHOR("Tapio Laxström");
290 MODULE_DESCRIPTION("Emagic EMI 2|6 firmware loader.");
291 MODULE_LICENSE("GPL");
293 MODULE_FIRMWARE("emi26/loader.fw");
294 MODULE_FIRMWARE("emi26/bitstream.fw");
295 MODULE_FIRMWARE("emi26/firmware.fw");
296 /* vi:ai:syntax=c:sw=8:ts=8:tw=80