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", __func__, 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", __func__, -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", __func__, 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", __func__, err);
 120                         goto wraperr;
 121                 }
 122         }
 123
 124         /* De-assert reset (let the CPU run) */
 125         err = emi62_set_reset(dev,0);
 126         if (err < 0) {
 127                 err("%s - error loading firmware: error = %d", __func__, err);
 128                 goto wraperr;
 129         }
 130         msleep(250);    /* let device settle */
 131
 132         /* 2. We upload the FPGA firmware into the EMI
 133          * Note: collect up to 1023 (yes!) bytes and send them with
 134          * a single request. This is _much_ faster! */
 135         do {
 136                 i = 0;
 137                 addr = g_emi62bs[pos].address;
 138
 139                 /* intel hex records are terminated with type 0 element */
 140                 while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
 141                         memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
 142                         i += g_emi62bs[pos].length;
 143                         pos++;
 144                 }
 145                 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
 146                 if (err < 0) {
 147                         err("%s - error loading firmware: error = %d", __func__, err);
 148                         goto wraperr;
 149                 }
 150         } while (i > 0);
 151
 152         /* Assert reset (stop the CPU in the EMI) */
 153         err = emi62_set_reset(dev,1);
 154         if (err < 0) {
 155                 err("%s - error loading firmware: error = %d", __func__, err);
 156                 goto wraperr;
 157         }
 158
 159         /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
 160         for (i=0; g_emi62_loader[i].type == 0; i++) {
 161                 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
 162                 if (err < 0) {
 163                         err("%s - error loading firmware: error = %d", __func__, err);
 164                         goto wraperr;
 165                 }
 166         }
 167
 168         /* De-assert reset (let the CPU run) */
 169         err = emi62_set_reset(dev,0);
 170         if (err < 0) {
 171                 err("%s - error loading firmware: error = %d", __func__, err);
 172                 goto wraperr;
 173         }
 174         msleep(250);    /* let device settle */
 175
 176         /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
 177
 178 /* FIXME: quick and dirty ifdefs */
 179 #ifdef SPDIF
 180         for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
 181                 if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
 182                         err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
 183                         if (err < 0) {
 184                                 err("%s - error loading firmware: error = %d", __func__, err);
 185                                 goto wraperr;
 186                         }
 187                 }
 188         }
 189 #else /* MIDI */
 190         for (i=0; g_HexMidiFw62[i].type == 0; i++) {
 191                 if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
 192                         err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
 193                         if (err < 0) {
 194                                 err("%s - error loading firmware: error = %d\n", __func__, err);
 195                                 goto wraperr;
 196                                 return err;
 197                         }
 198                 }
 199         }
 200 #endif
 201         /* Assert reset (stop the CPU in the EMI) */
 202         err = emi62_set_reset(dev,1);
 203         if (err < 0) {
 204                 err("%s - error loading firmware: error = %d", __func__, err);
 205                 goto wraperr;
 206         }
 207
 208 /* FIXME: quick and dirty ifdefs */
 209 #ifdef SPDIF
 210         for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
 211                 if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
 212                         err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
 213                         if (err < 0) {
 214                                 err("%s - error loading firmware: error = %d", __func__, err);
 215                                 goto wraperr;
 216                         }
 217                 }
 218         }
 219 #else /* MIDI */
 220         for (i=0; g_HexMidiFw62[i].type == 0; i++) {
 221                 if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
 222                         err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
 223                         if (err < 0) {
 224                                 err("%s - error loading firmware: error = %d\n", __func__, err);
 225                                 goto wraperr;
 226                         }
 227                 }
 228         }
 229 #endif
 230
 231         /* De-assert reset (let the CPU run) */
 232         err = emi62_set_reset(dev,0);
 233         if (err < 0) {
 234                 err("%s - error loading firmware: error = %d", __func__, err);
 235                 goto wraperr;
 236         }
 237         msleep(250);    /* let device settle */
 238
 239         kfree(buf);
 240
 241         /* return 1 to fail the driver inialization
 242          * and give real driver change to load */
 243         return 1;
 244
 245 wraperr:
 246         kfree(buf);
 247         dev_err(&dev->dev, "Error\n");
 248         return err;
 249 }
 250
 251 static __devinitdata struct usb_device_id id_table [] = {
 252         { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
 253         { }                                             /* Terminating entry */
 254 };
 255
 256 MODULE_DEVICE_TABLE (usb, id_table);
 257
 258 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
 259 {
 260         struct usb_device *dev = interface_to_usbdev(intf);
 261         dev_dbg(&intf->dev, "emi62_probe\n");
 262
 263         info("%s start", __func__);
 264
 265         emi62_load_firmware(dev);
 266
 267         /* do not return the driver context, let real audio driver do that */
 268         return -EIO;
 269 }
 270
 271 static void emi62_disconnect(struct usb_interface *intf)
 272 {
 273 }
 274
 275 static struct usb_driver emi62_driver = {
 276         .name           = "emi62 - firmware loader",
 277         .probe          = emi62_probe,
 278         .disconnect     = emi62_disconnect,
 279         .id_table       = id_table,
 280 };
 281
 282 static int __init emi62_init (void)
 283 {
 284         int retval;
 285         retval = usb_register (&emi62_driver);
 286         if (retval)
 287                 printk(KERN_ERR "adi-emi: registration failed\n");
 288         return retval;
 289 }
 290
 291 static void __exit emi62_exit (void)
 292 {
 293         usb_deregister (&emi62_driver);
 294 }
 295
 296 module_init(emi62_init);
 297 module_exit(emi62_exit);
 298
 299 MODULE_AUTHOR("Tapio Laxström");
 300 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
 301 MODULE_LICENSE("GPL");
 302
 303 /* vi:ai:syntax=c:sw=8:ts=8:tw=80
 304  */