dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / usb / misc / emi62.c
blob1d9be4431b7283ad8b06226f1e994da80ea04a48
1 /*
2 * Emagic EMI 2|6 usb audio interface firmware loader.
3 * Copyright (C) 2002
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.
9 */
10 #include <linux/kernel.h>
11 #include <linux/errno.h>
12 #include <linux/slab.h>
13 #include <linux/module.h>
14 #include <linux/usb.h>
15 #include <linux/delay.h>
16 #include <linux/firmware.h>
17 #include <linux/ihex.h>
19 /* include firmware (variables)*/
21 /* FIXME: This is quick and dirty solution! */
22 #define SPDIF /* if you want SPDIF comment next line */
23 //#undef SPDIF /* if you want MIDI uncomment this line */
25 #ifdef SPDIF
26 #define FIRMWARE_FW "emi62/spdif.fw"
27 #else
28 #define FIRMWARE_FW "emi62/midi.fw"
29 #endif
31 #define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
32 #define EMI62_PRODUCT_ID 0x0110 /* EMI 6|2m without firmware */
34 #define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
35 #define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
36 #define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
37 #define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
38 #define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
39 #define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
41 static int emi62_writememory(struct usb_device *dev, int address,
42 const unsigned char *data, int length,
43 __u8 bRequest);
44 static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
45 static int emi62_load_firmware (struct usb_device *dev);
46 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
47 static void emi62_disconnect(struct usb_interface *intf);
49 /* thanks to drivers/usb/serial/keyspan_pda.c code */
50 static int emi62_writememory(struct usb_device *dev, int address,
51 const unsigned char *data, int length,
52 __u8 request)
54 int result;
55 unsigned char *buffer = kmemdup(data, length, GFP_KERNEL);
57 if (!buffer) {
58 dev_err(&dev->dev, "kmalloc(%d) failed.\n", length);
59 return -ENOMEM;
61 /* Note: usb_control_msg returns negative value on error or length of the
62 * data that was written! */
63 result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
64 kfree (buffer);
65 return result;
68 /* thanks to drivers/usb/serial/keyspan_pda.c code */
69 static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
71 int response;
72 dev_info(&dev->dev, "%s - %d\n", __func__, reset_bit);
74 response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
75 if (response < 0)
76 dev_err(&dev->dev, "set_reset (%d) failed\n", reset_bit);
77 return response;
80 #define FW_LOAD_SIZE 1023
82 static int emi62_load_firmware (struct usb_device *dev)
84 const struct firmware *loader_fw = NULL;
85 const struct firmware *bitstream_fw = NULL;
86 const struct firmware *firmware_fw = NULL;
87 const struct ihex_binrec *rec;
88 int err = -ENOMEM;
89 int i;
90 __u32 addr; /* Address to write */
91 __u8 *buf;
93 dev_dbg(&dev->dev, "load_firmware\n");
94 buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
95 if (!buf)
96 goto wraperr;
98 err = request_ihex_firmware(&loader_fw, "emi62/loader.fw", &dev->dev);
99 if (err)
100 goto nofw;
102 err = request_ihex_firmware(&bitstream_fw, "emi62/bitstream.fw",
103 &dev->dev);
104 if (err)
105 goto nofw;
107 err = request_ihex_firmware(&firmware_fw, FIRMWARE_FW, &dev->dev);
108 if (err) {
109 nofw:
110 goto wraperr;
113 /* Assert reset (stop the CPU in the EMI) */
114 err = emi62_set_reset(dev,1);
115 if (err < 0)
116 goto wraperr;
118 rec = (const struct ihex_binrec *)loader_fw->data;
120 /* 1. We need to put the loader for the FPGA into the EZ-USB */
121 while (rec) {
122 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
123 rec->data, be16_to_cpu(rec->len),
124 ANCHOR_LOAD_INTERNAL);
125 if (err < 0)
126 goto wraperr;
127 rec = ihex_next_binrec(rec);
130 /* De-assert reset (let the CPU run) */
131 err = emi62_set_reset(dev,0);
132 if (err < 0)
133 goto wraperr;
134 msleep(250); /* let device settle */
136 /* 2. We upload the FPGA firmware into the EMI
137 * Note: collect up to 1023 (yes!) bytes and send them with
138 * a single request. This is _much_ faster! */
139 rec = (const struct ihex_binrec *)bitstream_fw->data;
140 do {
141 i = 0;
142 addr = be32_to_cpu(rec->addr);
144 /* intel hex records are terminated with type 0 element */
145 while (rec && (i + be16_to_cpu(rec->len) < FW_LOAD_SIZE)) {
146 memcpy(buf + i, rec->data, be16_to_cpu(rec->len));
147 i += be16_to_cpu(rec->len);
148 rec = ihex_next_binrec(rec);
150 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
151 if (err < 0)
152 goto wraperr;
153 } while (rec);
155 /* Assert reset (stop the CPU in the EMI) */
156 err = emi62_set_reset(dev,1);
157 if (err < 0)
158 goto wraperr;
160 /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
161 for (rec = (const struct ihex_binrec *)loader_fw->data;
162 rec; rec = ihex_next_binrec(rec)) {
163 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
164 rec->data, be16_to_cpu(rec->len),
165 ANCHOR_LOAD_INTERNAL);
166 if (err < 0)
167 goto wraperr;
170 /* De-assert reset (let the CPU run) */
171 err = emi62_set_reset(dev,0);
172 if (err < 0)
173 goto wraperr;
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 for (rec = (const struct ihex_binrec *)firmware_fw->data;
179 rec; rec = ihex_next_binrec(rec)) {
180 if (!INTERNAL_RAM(be32_to_cpu(rec->addr))) {
181 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
182 rec->data, be16_to_cpu(rec->len),
183 ANCHOR_LOAD_EXTERNAL);
184 if (err < 0)
185 goto wraperr;
189 /* Assert reset (stop the CPU in the EMI) */
190 err = emi62_set_reset(dev,1);
191 if (err < 0)
192 goto wraperr;
194 for (rec = (const struct ihex_binrec *)firmware_fw->data;
195 rec; rec = ihex_next_binrec(rec)) {
196 if (INTERNAL_RAM(be32_to_cpu(rec->addr))) {
197 err = emi62_writememory(dev, be32_to_cpu(rec->addr),
198 rec->data, be16_to_cpu(rec->len),
199 ANCHOR_LOAD_EXTERNAL);
200 if (err < 0)
201 goto wraperr;
205 /* De-assert reset (let the CPU run) */
206 err = emi62_set_reset(dev,0);
207 if (err < 0)
208 goto wraperr;
209 msleep(250); /* let device settle */
211 release_firmware(loader_fw);
212 release_firmware(bitstream_fw);
213 release_firmware(firmware_fw);
215 kfree(buf);
217 /* return 1 to fail the driver inialization
218 * and give real driver change to load */
219 return 1;
221 wraperr:
222 if (err < 0)
223 dev_err(&dev->dev,"%s - error loading firmware: error = %d\n",
224 __func__, err);
225 release_firmware(loader_fw);
226 release_firmware(bitstream_fw);
227 release_firmware(firmware_fw);
229 kfree(buf);
230 dev_err(&dev->dev, "Error\n");
231 return err;
234 static const struct usb_device_id id_table[] = {
235 { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
236 { } /* Terminating entry */
239 MODULE_DEVICE_TABLE (usb, id_table);
241 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
243 struct usb_device *dev = interface_to_usbdev(intf);
244 dev_dbg(&intf->dev, "emi62_probe\n");
246 dev_info(&intf->dev, "%s start\n", __func__);
248 emi62_load_firmware(dev);
250 /* do not return the driver context, let real audio driver do that */
251 return -EIO;
254 static void emi62_disconnect(struct usb_interface *intf)
258 static struct usb_driver emi62_driver = {
259 .name = "emi62 - firmware loader",
260 .probe = emi62_probe,
261 .disconnect = emi62_disconnect,
262 .id_table = id_table,
265 module_usb_driver(emi62_driver);
267 MODULE_AUTHOR("Tapio Laxström");
268 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
269 MODULE_LICENSE("GPL");
271 MODULE_FIRMWARE("emi62/loader.fw");
272 MODULE_FIRMWARE("emi62/bitstream.fw");
273 MODULE_FIRMWARE(FIRMWARE_FW);
274 /* vi:ai:syntax=c:sw=8:ts=8:tw=80