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
  29 struct dsp_code_private {
  30         /**  Firmware descriptor */
  31         const struct firmware *firmware;
  32         struct pci_dev *dev;
  33 };
  34
  35 #define HPI_VER_DECIMAL ((int)(HPI_VER_MAJOR(HPI_VER) * 10000 + \
  36             HPI_VER_MINOR(HPI_VER) * 100 + HPI_VER_RELEASE(HPI_VER)))
  37
  38 /*-------------------------------------------------------------------*/
  39 short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
  40         u32 *os_error_code)
  41 {
  42         const struct firmware *firmware;
  43         struct pci_dev *dev = os_data;
  44         struct code_header header;
  45         char fw_name[20];
  46         short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND;
  47         int err;
  48
  49         sprintf(fw_name, "asihpi/dsp%04x.bin", adapter);
  50
  51         err = request_firmware(&firmware, fw_name, &dev->dev);
  52
  53         if (err || !firmware) {
  54                 dev_printk(KERN_ERR, &dev->dev,
  55                         "%d, request_firmware failed for  %s\n", err,
  56                         fw_name);
  57                 goto error1;
  58         }
  59         if (firmware->size < sizeof(header)) {
  60                 dev_printk(KERN_ERR, &dev->dev, "Header size too small %s\n",
  61                         fw_name);
  62                 goto error2;
  63         }
  64         memcpy(&header, firmware->data, sizeof(header));
  65
  66         if ((header.type != 0x45444F43) ||      /* "CODE" */
  67                 (header.adapter != adapter)
  68                 || (header.size != firmware->size)) {
  69                 dev_printk(KERN_ERR, &dev->dev, "Invalid firmware file\n");
  70                 goto error2;
  71         }
  72
  73         if ((header.version / 100 & ~1) != (HPI_VER_DECIMAL / 100 & ~1)) {
  74                 dev_printk(KERN_ERR, &dev->dev,
  75                         "Incompatible firmware version "
  76                         "DSP image %d != Driver %d\n", header.version,
  77                         HPI_VER_DECIMAL);
  78                 goto error2;
  79         }
  80
  81         if (header.version != HPI_VER_DECIMAL) {
  82                 dev_printk(KERN_WARNING, &dev->dev,
  83                         "Firmware: release version mismatch  DSP image %d != Driver %d\n",
  84                         header.version, HPI_VER_DECIMAL);
  85         }
  86
  87         HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
  88         dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
  89         if (!dsp_code->pvt) {
  90                 err_ret = HPI_ERROR_MEMORY_ALLOC;
  91                 goto error2;
  92         }
  93
  94         dsp_code->pvt->dev = dev;
  95         dsp_code->pvt->firmware = firmware;
  96         dsp_code->header = header;
  97         dsp_code->block_length = header.size / sizeof(u32);
  98         dsp_code->word_count = sizeof(header) / sizeof(u32);
  99         return 0;
 100
 101 error2:
 102         release_firmware(firmware);
 103 error1:
 104         dsp_code->block_length = 0;
 105         return err_ret;
 106 }
 107
 108 /*-------------------------------------------------------------------*/
 109 void hpi_dsp_code_close(struct dsp_code *dsp_code)
 110 {
 111         if (dsp_code->pvt->firmware) {
 112                 HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
 113                 release_firmware(dsp_code->pvt->firmware);
 114                 dsp_code->pvt->firmware = NULL;
 115         }
 116         kfree(dsp_code->pvt);
 117 }
 118
 119 /*-------------------------------------------------------------------*/
 120 void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
 121 {
 122         /* Go back to start of  data, after header */
 123         dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
 124 }
 125
 126 /*-------------------------------------------------------------------*/
 127 short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
 128 {
 129         if (dsp_code->word_count + 1 > dsp_code->block_length)
 130                 return HPI_ERROR_DSP_FILE_FORMAT;
 131
 132         *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
 133                 word_count];
 134         dsp_code->word_count++;
 135         return 0;
 136 }
 137
 138 /*-------------------------------------------------------------------*/
 139 short hpi_dsp_code_read_block(size_t words_requested,
 140         struct dsp_code *dsp_code, u32 **ppblock)
 141 {
 142         if (dsp_code->word_count + words_requested > dsp_code->block_length)
 143                 return HPI_ERROR_DSP_FILE_FORMAT;
 144
 145         *ppblock =
 146                 ((u32 *)(dsp_code->pvt->firmware->data)) +
 147                 dsp_code->word_count;
 148         dsp_code->word_count += words_requested;
 149         return 0;
 150 }