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1da177e4 LT |
1 | /* |
2 | * Emagic EMI 2|6 usb audio interface firmware loader. | |
3 | * Copyright (C) 2002 | |
96de0e25 | 4 | * Tapio Laxström (tapio.laxstrom@iptime.fi) |
1da177e4 LT |
5 | * |
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 | * $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $ | |
11 | */ | |
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> | |
16c23f7d | 18 | #include <linux/delay.h> |
1da177e4 LT |
19 | |
20 | #define MAX_INTEL_HEX_RECORD_LENGTH 16 | |
21 | typedef struct _INTEL_HEX_RECORD | |
22 | { | |
23 | __u32 length; | |
24 | __u32 address; | |
25 | __u32 type; | |
26 | __u8 data[MAX_INTEL_HEX_RECORD_LENGTH]; | |
27 | } INTEL_HEX_RECORD, *PINTEL_HEX_RECORD; | |
28 | ||
29 | /* include firmware (variables)*/ | |
30 | ||
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 */ | |
34 | ||
35 | #ifdef SPDIF | |
36 | # include "emi62_fw_s.h" /* spdif fw */ | |
37 | #else | |
38 | # include "emi62_fw_m.h" /* midi fw */ | |
39 | #endif | |
40 | ||
41 | #define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */ | |
42 | #define EMI62_PRODUCT_ID 0x0110 /* EMI 6|2m without firmware */ | |
43 | ||
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) | |
50 | ||
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); | |
58 | ||
59 | ||
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) | |
62 | { | |
63 | int result; | |
5d7efe5b | 64 | unsigned char *buffer = kmemdup(data, length, GFP_KERNEL); |
1da177e4 LT |
65 | |
66 | if (!buffer) { | |
67 | err("emi62: kmalloc(%d) failed.", length); | |
68 | return -ENOMEM; | |
69 | } | |
1da177e4 LT |
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); | |
73 | kfree (buffer); | |
74 | return result; | |
75 | } | |
76 | ||
77 | /* thanks to drivers/usb/serial/keyspan_pda.c code */ | |
78 | static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit) | |
79 | { | |
80 | int response; | |
81 | info("%s - %d", __FUNCTION__, reset_bit); | |
82 | ||
83 | response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0); | |
84 | if (response < 0) { | |
85 | err("emi62: set_reset (%d) failed", reset_bit); | |
86 | } | |
87 | return response; | |
88 | } | |
89 | ||
90 | #define FW_LOAD_SIZE 1023 | |
91 | ||
92 | static int emi62_load_firmware (struct usb_device *dev) | |
93 | { | |
94 | int err; | |
95 | int i; | |
96 | int pos = 0; /* Position in hex record */ | |
97 | __u32 addr; /* Address to write */ | |
98 | __u8 *buf; | |
99 | ||
100 | dev_dbg(&dev->dev, "load_firmware\n"); | |
101 | buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL); | |
102 | if (!buf) { | |
103 | err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM); | |
104 | err = -ENOMEM; | |
105 | goto wraperr; | |
106 | } | |
107 | ||
108 | /* Assert reset (stop the CPU in the EMI) */ | |
109 | err = emi62_set_reset(dev,1); | |
110 | if (err < 0) { | |
111 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
112 | goto wraperr; | |
113 | } | |
114 | ||
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); | |
118 | if (err < 0) { | |
119 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
120 | goto wraperr; | |
121 | } | |
122 | } | |
123 | ||
124 | /* De-assert reset (let the CPU run) */ | |
125 | err = emi62_set_reset(dev,0); | |
16c23f7d | 126 | msleep(250); /* let device settle */ |
1da177e4 LT |
127 | |
128 | /* 2. We upload the FPGA firmware into the EMI | |
129 | * Note: collect up to 1023 (yes!) bytes and send them with | |
130 | * a single request. This is _much_ faster! */ | |
131 | do { | |
132 | i = 0; | |
133 | addr = g_emi62bs[pos].address; | |
134 | ||
135 | /* intel hex records are terminated with type 0 element */ | |
136 | while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) { | |
137 | memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length); | |
138 | i += g_emi62bs[pos].length; | |
139 | pos++; | |
140 | } | |
141 | err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA); | |
142 | if (err < 0) { | |
143 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
144 | goto wraperr; | |
145 | } | |
146 | } while (i > 0); | |
147 | ||
148 | /* Assert reset (stop the CPU in the EMI) */ | |
149 | err = emi62_set_reset(dev,1); | |
150 | if (err < 0) { | |
151 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
152 | goto wraperr; | |
153 | } | |
154 | ||
155 | /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */ | |
156 | for (i=0; g_emi62_loader[i].type == 0; i++) { | |
157 | err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL); | |
158 | if (err < 0) { | |
159 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
160 | goto wraperr; | |
161 | } | |
162 | } | |
163 | ||
164 | /* De-assert reset (let the CPU run) */ | |
165 | err = emi62_set_reset(dev,0); | |
166 | if (err < 0) { | |
167 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
168 | goto wraperr; | |
169 | } | |
16c23f7d | 170 | msleep(250); /* let device settle */ |
1da177e4 LT |
171 | |
172 | /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */ | |
173 | ||
174 | /* FIXME: quick and dirty ifdefs */ | |
175 | #ifdef SPDIF | |
176 | for (i=0; g_HexSpdifFw62[i].type == 0; i++) { | |
177 | if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) { | |
178 | err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL); | |
179 | if (err < 0) { | |
180 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
181 | goto wraperr; | |
182 | } | |
183 | } | |
184 | } | |
185 | #else /* MIDI */ | |
186 | for (i=0; g_HexMidiFw62[i].type == 0; i++) { | |
187 | if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) { | |
188 | err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL); | |
189 | if (err < 0) { | |
190 | err("%s - error loading firmware: error = %d\n", __FUNCTION__, err); | |
191 | goto wraperr; | |
192 | return err; | |
193 | } | |
194 | } | |
195 | } | |
196 | #endif | |
197 | /* Assert reset (stop the CPU in the EMI) */ | |
198 | err = emi62_set_reset(dev,1); | |
199 | if (err < 0) { | |
200 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
201 | goto wraperr; | |
202 | } | |
203 | ||
204 | /* FIXME: quick and dirty ifdefs */ | |
205 | #ifdef SPDIF | |
206 | for (i=0; g_HexSpdifFw62[i].type == 0; i++) { | |
207 | if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) { | |
208 | err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL); | |
209 | if (err < 0) { | |
210 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
211 | goto wraperr; | |
212 | } | |
213 | } | |
214 | } | |
215 | #else /* MIDI */ | |
216 | for (i=0; g_HexMidiFw62[i].type == 0; i++) { | |
217 | if (INTERNAL_RAM(g_HexMidiFw62[i].address)) { | |
218 | err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL); | |
219 | if (err < 0) { | |
220 | err("%s - error loading firmware: error = %d\n", __FUNCTION__, err); | |
221 | goto wraperr; | |
222 | } | |
223 | } | |
224 | } | |
225 | #endif | |
226 | ||
227 | /* De-assert reset (let the CPU run) */ | |
228 | err = emi62_set_reset(dev,0); | |
229 | if (err < 0) { | |
230 | err("%s - error loading firmware: error = %d", __FUNCTION__, err); | |
231 | goto wraperr; | |
232 | } | |
16c23f7d | 233 | msleep(250); /* let device settle */ |
1da177e4 LT |
234 | |
235 | kfree(buf); | |
236 | ||
237 | /* return 1 to fail the driver inialization | |
238 | * and give real driver change to load */ | |
239 | return 1; | |
240 | ||
241 | wraperr: | |
242 | kfree(buf); | |
243 | dev_err(&dev->dev, "Error\n"); | |
244 | return err; | |
245 | } | |
246 | ||
247 | static __devinitdata struct usb_device_id id_table [] = { | |
248 | { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) }, | |
249 | { } /* Terminating entry */ | |
250 | }; | |
251 | ||
252 | MODULE_DEVICE_TABLE (usb, id_table); | |
253 | ||
254 | static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
255 | { | |
256 | struct usb_device *dev = interface_to_usbdev(intf); | |
257 | dev_dbg(&intf->dev, "emi62_probe\n"); | |
258 | ||
259 | info("%s start", __FUNCTION__); | |
260 | ||
261 | emi62_load_firmware(dev); | |
262 | ||
263 | /* do not return the driver context, let real audio driver do that */ | |
264 | return -EIO; | |
265 | } | |
266 | ||
267 | static void emi62_disconnect(struct usb_interface *intf) | |
268 | { | |
269 | } | |
270 | ||
271 | static struct usb_driver emi62_driver = { | |
1da177e4 LT |
272 | .name = "emi62 - firmware loader", |
273 | .probe = emi62_probe, | |
274 | .disconnect = emi62_disconnect, | |
275 | .id_table = id_table, | |
276 | }; | |
277 | ||
278 | static int __init emi62_init (void) | |
279 | { | |
280 | int retval; | |
281 | retval = usb_register (&emi62_driver); | |
282 | if (retval) | |
283 | printk(KERN_ERR "adi-emi: registration failed\n"); | |
284 | return retval; | |
285 | } | |
286 | ||
287 | static void __exit emi62_exit (void) | |
288 | { | |
289 | usb_deregister (&emi62_driver); | |
290 | } | |
291 | ||
292 | module_init(emi62_init); | |
293 | module_exit(emi62_exit); | |
294 | ||
96de0e25 | 295 | MODULE_AUTHOR("Tapio Laxström"); |
1da177e4 LT |
296 | MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader."); |
297 | MODULE_LICENSE("GPL"); | |
298 | ||
299 | /* vi:ai:syntax=c:sw=8:ts=8:tw=80 | |
300 | */ |