Pileus Git - ~andy/linux/blob - drivers/staging/media/as102/as102_fw.c

   1 /*
   2  * Abilis Systems Single DVB-T Receiver
   3  * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
   4  * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
   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; either version 2, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20 #include <linux/kernel.h>
  21 #include <linux/errno.h>
  22 #include <linux/ctype.h>
  23 #include <linux/delay.h>
  24 #include <linux/firmware.h>
  25
  26 #include "as102_drv.h"
  27 #include "as102_fw.h"
  28
  29 static const char as102_st_fw1[] = "as102_data1_st.hex";
  30 static const char as102_st_fw2[] = "as102_data2_st.hex";
  31 static const char as102_dt_fw1[] = "as102_data1_dt.hex";
  32 static const char as102_dt_fw2[] = "as102_data2_dt.hex";
  33
  34 static unsigned char atohx(unsigned char *dst, char *src)
  35 {
  36         unsigned char value = 0;
  37
  38         char msb = tolower(*src) - '0';
  39         char lsb = tolower(*(src + 1)) - '0';
  40
  41         if (msb > 9)
  42                 msb -= 7;
  43         if (lsb > 9)
  44                 lsb -= 7;
  45
  46         *dst = value = ((msb & 0xF) << 4) | (lsb & 0xF);
  47         return value;
  48 }
  49
  50 /*
  51  * Parse INTEL HEX firmware file to extract address and data.
  52  */
  53 static int parse_hex_line(unsigned char *fw_data, unsigned char *addr,
  54                           unsigned char *data, int *dataLength,
  55                           unsigned char *addr_has_changed) {
  56
  57         int count = 0;
  58         unsigned char *src, dst;
  59
  60         if (*fw_data++ != ':') {
  61                 pr_err("invalid firmware file\n");
  62                 return -EFAULT;
  63         }
  64
  65         /* locate end of line */
  66         for (src = fw_data; *src != '\n'; src += 2) {
  67                 atohx(&dst, src);
  68                 /* parse line to split addr / data */
  69                 switch (count) {
  70                 case 0:
  71                         *dataLength = dst;
  72                         break;
  73                 case 1:
  74                         addr[2] = dst;
  75                         break;
  76                 case 2:
  77                         addr[3] = dst;
  78                         break;
  79                 case 3:
  80                         /* check if data is an address */
  81                         if (dst == 0x04)
  82                                 *addr_has_changed = 1;
  83                         else
  84                                 *addr_has_changed = 0;
  85                         break;
  86                 case  4:
  87                 case  5:
  88                         if (*addr_has_changed)
  89                                 addr[(count - 4)] = dst;
  90                         else
  91                                 data[(count - 4)] = dst;
  92                         break;
  93                 default:
  94                         data[(count - 4)] = dst;
  95                         break;
  96                 }
  97                 count++;
  98         }
  99
 100         /* return read value + ':' + '\n' */
 101         return (count * 2) + 2;
 102 }
 103
 104 static int as102_firmware_upload(struct as10x_bus_adapter_t *bus_adap,
 105                                  unsigned char *cmd,
 106                                  const struct firmware *firmware) {
 107
 108         struct as10x_fw_pkt_t fw_pkt;
 109         int total_read_bytes = 0, errno = 0;
 110         unsigned char addr_has_changed = 0;
 111
 112         for (total_read_bytes = 0; total_read_bytes < firmware->size; ) {
 113                 int read_bytes = 0, data_len = 0;
 114
 115                 /* parse intel hex line */
 116                 read_bytes = parse_hex_line(
 117                                 (u8 *) (firmware->data + total_read_bytes),
 118                                 fw_pkt.raw.address,
 119                                 fw_pkt.raw.data,
 120                                 &data_len,
 121                                 &addr_has_changed);
 122
 123                 if (read_bytes <= 0)
 124                         goto error;
 125
 126                 /* detect the end of file */
 127                 total_read_bytes += read_bytes;
 128                 if (total_read_bytes == firmware->size) {
 129                         fw_pkt.u.request[0] = 0x00;
 130                         fw_pkt.u.request[1] = 0x03;
 131
 132                         /* send EOF command */
 133                         errno = bus_adap->ops->upload_fw_pkt(bus_adap,
 134                                                              (uint8_t *)
 135                                                              &fw_pkt, 2, 0);
 136                         if (errno < 0)
 137                                 goto error;
 138                 } else {
 139                         if (!addr_has_changed) {
 140                                 /* prepare command to send */
 141                                 fw_pkt.u.request[0] = 0x00;
 142                                 fw_pkt.u.request[1] = 0x01;
 143
 144                                 data_len += sizeof(fw_pkt.u.request);
 145                                 data_len += sizeof(fw_pkt.raw.address);
 146
 147                                 /* send cmd to device */
 148                                 errno = bus_adap->ops->upload_fw_pkt(bus_adap,
 149                                                                      (uint8_t *)
 150                                                                      &fw_pkt,
 151                                                                      data_len,
 152                                                                      0);
 153                                 if (errno < 0)
 154                                         goto error;
 155                         }
 156                 }
 157         }
 158 error:
 159         return (errno == 0) ? total_read_bytes : errno;
 160 }
 161
 162 int as102_fw_upload(struct as10x_bus_adapter_t *bus_adap)
 163 {
 164         int errno = -EFAULT;
 165         const struct firmware *firmware = NULL;
 166         unsigned char *cmd_buf = NULL;
 167         const char *fw1, *fw2;
 168         struct usb_device *dev = bus_adap->usb_dev;
 169
 170         /* select fw file to upload */
 171         if (dual_tuner) {
 172                 fw1 = as102_dt_fw1;
 173                 fw2 = as102_dt_fw2;
 174         } else {
 175                 fw1 = as102_st_fw1;
 176                 fw2 = as102_st_fw2;
 177         }
 178
 179         /* allocate buffer to store firmware upload command and data */
 180         cmd_buf = kzalloc(MAX_FW_PKT_SIZE, GFP_KERNEL);
 181         if (cmd_buf == NULL) {
 182                 errno = -ENOMEM;
 183                 goto error;
 184         }
 185
 186         /* request kernel to locate firmware file: part1 */
 187         errno = request_firmware(&firmware, fw1, &dev->dev);
 188         if (errno < 0) {
 189                 pr_err("%s: unable to locate firmware file: %s\n",
 190                        DRIVER_NAME, fw1);
 191                 goto error;
 192         }
 193
 194         /* initiate firmware upload */
 195         errno = as102_firmware_upload(bus_adap, cmd_buf, firmware);
 196         if (errno < 0) {
 197                 pr_err("%s: error during firmware upload part1\n",
 198                        DRIVER_NAME);
 199                 goto error;
 200         }
 201
 202         pr_info("%s: firmware: %s loaded with success\n",
 203                 DRIVER_NAME, fw1);
 204         release_firmware(firmware);
 205
 206         /* wait for boot to complete */
 207         mdelay(100);
 208
 209         /* request kernel to locate firmware file: part2 */
 210         errno = request_firmware(&firmware, fw2, &dev->dev);
 211         if (errno < 0) {
 212                 pr_err("%s: unable to locate firmware file: %s\n",
 213                        DRIVER_NAME, fw2);
 214                 goto error;
 215         }
 216
 217         /* initiate firmware upload */
 218         errno = as102_firmware_upload(bus_adap, cmd_buf, firmware);
 219         if (errno < 0) {
 220                 pr_err("%s: error during firmware upload part2\n",
 221                        DRIVER_NAME);
 222                 goto error;
 223         }
 224
 225         pr_info("%s: firmware: %s loaded with success\n",
 226                 DRIVER_NAME, fw2);
 227 error:
 228         kfree(cmd_buf);
 229         release_firmware(firmware);
 230
 231         return errno;
 232 }