kernel/2.6.29.6-aldebaran-rt/drivers/media/video/cx18/cx18-av-firmware.c

   1 /*
   2  *  cx18 ADEC firmware functions
   3  *
   4  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   5  *  Copyright (C) 2008  Andy Walls <awalls@radix.net>
   6  *
   7  *  This program is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU General Public License
   9  *  as published by the Free Software Foundation; either version 2
  10  *  of the License, or (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  *  02110-1301, USA.
  21  */
  22
  23 #include "cx18-driver.h"
  24 #include "cx18-io.h"
  25 #include <linux/firmware.h>
  26
  27 #define CX18_AUDIO_ENABLE 0xc72014
  28 #define FWFILE "v4l-cx23418-dig.fw"
  29
  30 int cx18_av_loadfw(struct cx18 *cx)
  31 {
  32         const struct firmware *fw = NULL;
  33         u32 size;
  34         u32 v;
  35         const u8 *ptr;
  36         int i;
  37         int retries1 = 0;
  38
  39         if (request_firmware(&fw, FWFILE, &cx->dev->dev) != 0) {
  40                 CX18_ERR("unable to open firmware %s\n", FWFILE);
  41                 return -EINVAL;
  42         }
  43
  44         /* The firmware load often has byte errors, so allow for several
  45            retries, both at byte level and at the firmware load level. */
  46         while (retries1 < 5) {
  47                 cx18_av_write4_expect(cx, CXADEC_CHIP_CTRL, 0x00010000,
  48                                           0x00008430, 0xffffffff); /* cx25843 */
  49                 cx18_av_write_expect(cx, CXADEC_STD_DET_CTL, 0xf6, 0xf6, 0xff);
  50
  51                 /* Reset the Mako core, Register is alias of CXADEC_CHIP_CTRL */
  52                 cx18_av_write4_expect(cx, 0x8100, 0x00010000,
  53                                           0x00008430, 0xffffffff); /* cx25843 */
  54
  55                 /* Put the 8051 in reset and enable firmware upload */
  56                 cx18_av_write4_noretry(cx, CXADEC_DL_CTL, 0x0F000000);
  57
  58                 ptr = fw->data;
  59                 size = fw->size;
  60
  61                 for (i = 0; i < size; i++) {
  62                         u32 dl_control = 0x0F000000 | i | ((u32)ptr[i] << 16);
  63                         u32 value = 0;
  64                         int retries2;
  65                         int unrec_err = 0;
  66
  67                         for (retries2 = 0; retries2 < CX18_MAX_MMIO_WR_RETRIES;
  68                              retries2++) {
  69                                 cx18_av_write4_noretry(cx, CXADEC_DL_CTL,
  70                                                        dl_control);
  71                                 udelay(10);
  72                                 value = cx18_av_read4(cx, CXADEC_DL_CTL);
  73                                 if (value == dl_control)
  74                                         break;
  75                                 /* Check if we can correct the byte by changing
  76                                    the address.  We can only write the lower
  77                                    address byte of the address. */
  78                                 if ((value & 0x3F00) != (dl_control & 0x3F00)) {
  79                                         unrec_err = 1;
  80                                         break;
  81                                 }
  82                         }
  83                         if (unrec_err || retries2 >= CX18_MAX_MMIO_WR_RETRIES)
  84                                 break;
  85                 }
  86                 if (i == size)
  87                         break;
  88                 retries1++;
  89         }
  90         if (retries1 >= 5) {
  91                 CX18_ERR("unable to load firmware %s\n", FWFILE);
  92                 release_firmware(fw);
  93                 return -EIO;
  94         }
  95
  96         cx18_av_write4_expect(cx, CXADEC_DL_CTL,
  97                                 0x13000000 | fw->size, 0x13000000, 0x13000000);
  98
  99         /* Output to the 416 */
 100         cx18_av_and_or4(cx, CXADEC_PIN_CTRL1, ~0, 0x78000);
 101
 102         /* Audio input control 1 set to Sony mode */
 103         /* Audio output input 2 is 0 for slave operation input */
 104         /* 0xC4000914[5]: 0 = left sample on WS=0, 1 = left sample on WS=1 */
 105         /* 0xC4000914[7]: 0 = Philips mode, 1 = Sony mode (1st SCK rising edge
 106            after WS transition for first bit of audio word. */
 107         cx18_av_write4(cx, CXADEC_I2S_IN_CTL, 0x000000A0);
 108
 109         /* Audio output control 1 is set to Sony mode */
 110         /* Audio output control 2 is set to 1 for master mode */
 111         /* 0xC4000918[5]: 0 = left sample on WS=0, 1 = left sample on WS=1 */
 112         /* 0xC4000918[7]: 0 = Philips mode, 1 = Sony mode (1st SCK rising edge
 113            after WS transition for first bit of audio word. */
 114         /* 0xC4000918[8]: 0 = slave operation, 1 = master (SCK_OUT and WS_OUT
 115            are generated) */
 116         cx18_av_write4(cx, CXADEC_I2S_OUT_CTL, 0x000001A0);
 117
 118         /* set alt I2s master clock to /16 and enable alt divider i2s
 119            passthrough */
 120         cx18_av_write4(cx, CXADEC_PIN_CFG3, 0x5000B687);
 121
 122         cx18_av_write4_expect(cx, CXADEC_STD_DET_CTL, 0x000000F6, 0x000000F6,
 123                                                                   0x3F00FFFF);
 124         /* CxDevWrReg(CXADEC_STD_DET_CTL, 0x000000FF); */
 125
 126         /* Set bit 0 in register 0x9CC to signify that this is MiniMe. */
 127         /* Register 0x09CC is defined by the Merlin firmware, and doesn't
 128            have a name in the spec. */
 129         cx18_av_write4(cx, 0x09CC, 1);
 130
 131         v = cx18_read_reg(cx, CX18_AUDIO_ENABLE);
 132         /* If bit 11 is 1, clear bit 10 */
 133         if (v & 0x800)
 134                 cx18_write_reg(cx, v & 0xFFFFFBFF, CX18_AUDIO_ENABLE);
 135
 136         /* Enable WW auto audio standard detection */
 137         v = cx18_av_read4(cx, CXADEC_STD_DET_CTL);
 138         v |= 0xFF;   /* Auto by default */
 139         v |= 0x400;  /* Stereo by default */
 140         v |= 0x14000000;
 141         cx18_av_write4_expect(cx, CXADEC_STD_DET_CTL, v, v, 0x3F00FFFF);
 142
 143         release_firmware(fw);
 144
 145         CX18_INFO("loaded %s firmware (%d bytes)\n", FWFILE, size);
 146         return 0;
 147 }