drivers/usb/misc/emi62.c

   1 /*
   2  * Emagic EMI 2|6 usb audio interface firmware loader.
   3  * Copyright (C) 2002
   4  *      Tapio Laxström (tapio.laxstrom@iptime.fi)
   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>
  18 #include <linux/delay.h>
  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;
  64         unsigned char *buffer =  kmemdup(data, length, GFP_KERNEL);
  65
  66         if (!buffer) {
  67                 err("emi62: kmalloc(%d) failed.", length);
  68                 return -ENOMEM;
  69         }
  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);
 126         msleep(250);    /* let device settle */
 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         }
 170         msleep(250);    /* let device settle */
 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         }
 233         msleep(250);    /* let device settle */
 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 = {
 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
 295 MODULE_AUTHOR("Tapio Laxström");
 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  */