sound/pci/asihpi/hpidspcd.c

   1 /***********************************************************************/
   2 /**
   3
   4     AudioScience HPI driver
   5     Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of version 2 of the GNU General Public License as
   9     published by the Free Software Foundation;
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19
  20 \file
  21 Functions for reading DSP code using
  22 hotplug firmware loader from individual dsp code files
  23 */
  24 /***********************************************************************/
  25 #define SOURCEFILE_NAME "hpidspcd.c"
  26 #include "hpidspcd.h"
  27 #include "hpidebug.h"
  28 #include "hpi_version.h"
  29
  30 struct dsp_code_private {
  31         /**  Firmware descriptor */
  32         const struct firmware *firmware;
  33         struct pci_dev *dev;
  34 };
  35
  36 /*-------------------------------------------------------------------*/
  37 short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
  38         u32 *os_error_code)
  39 {
  40         const struct firmware *firmware;
  41         struct pci_dev *dev = os_data;
  42         struct code_header header;
  43         char fw_name[20];
  44         short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND;
  45         int err;
  46
  47         sprintf(fw_name, "asihpi/dsp%04x.bin", adapter);
  48
  49         err = request_firmware(&firmware, fw_name, &dev->dev);
  50
  51         if (err || !firmware) {
  52                 dev_err(&dev->dev, "%d, request_firmware failed for %s\n",
  53                         err, fw_name);
  54                 goto error1;
  55         }
  56         if (firmware->size < sizeof(header)) {
  57                 dev_err(&dev->dev, "Header size too small %s\n", fw_name);
  58                 goto error2;
  59         }
  60         memcpy(&header, firmware->data, sizeof(header));
  61
  62         if ((header.type != 0x45444F43) ||      /* "CODE" */
  63                 (header.adapter != adapter)
  64                 || (header.size != firmware->size)) {
  65                 dev_err(&dev->dev,
  66                         "Invalid firmware header size %d != file %zd\n",
  67                         header.size, firmware->size);
  68                 goto error2;
  69         }
  70
  71         if ((header.version >> 9) != (HPI_VER >> 9)) {
  72                 /* Consider even and subsequent odd minor versions to be compatible */
  73                 dev_err(&dev->dev, "Incompatible firmware version DSP image %X != Driver %X\n",
  74                         header.version, HPI_VER);
  75                 goto error2;
  76         }
  77
  78         if (header.version != HPI_VER) {
  79                 dev_info(&dev->dev,
  80                          "Firmware: release version mismatch  DSP image %X != Driver %X\n",
  81                          header.version, HPI_VER);
  82         }
  83
  84         HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
  85         dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
  86         if (!dsp_code->pvt) {
  87                 err_ret = HPI_ERROR_MEMORY_ALLOC;
  88                 goto error2;
  89         }
  90
  91         dsp_code->pvt->dev = dev;
  92         dsp_code->pvt->firmware = firmware;
  93         dsp_code->header = header;
  94         dsp_code->block_length = header.size / sizeof(u32);
  95         dsp_code->word_count = sizeof(header) / sizeof(u32);
  96         return 0;
  97
  98 error2:
  99         release_firmware(firmware);
 100 error1:
 101         dsp_code->block_length = 0;
 102         return err_ret;
 103 }
 104
 105 /*-------------------------------------------------------------------*/
 106 void hpi_dsp_code_close(struct dsp_code *dsp_code)
 107 {
 108         HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
 109         release_firmware(dsp_code->pvt->firmware);
 110         kfree(dsp_code->pvt);
 111 }
 112
 113 /*-------------------------------------------------------------------*/
 114 void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
 115 {
 116         /* Go back to start of  data, after header */
 117         dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
 118 }
 119
 120 /*-------------------------------------------------------------------*/
 121 short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
 122 {
 123         if (dsp_code->word_count + 1 > dsp_code->block_length)
 124                 return HPI_ERROR_DSP_FILE_FORMAT;
 125
 126         *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
 127                 word_count];
 128         dsp_code->word_count++;
 129         return 0;
 130 }
 131
 132 /*-------------------------------------------------------------------*/
 133 short hpi_dsp_code_read_block(size_t words_requested,
 134         struct dsp_code *dsp_code, u32 **ppblock)
 135 {
 136         if (dsp_code->word_count + words_requested > dsp_code->block_length)
 137                 return HPI_ERROR_DSP_FILE_FORMAT;
 138
 139         *ppblock =
 140                 ((u32 *)(dsp_code->pvt->firmware->data)) +
 141                 dsp_code->word_count;
 142         dsp_code->word_count += words_requested;
 143         return 0;
 144 }