drivers/staging/vt6656/firmware.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  *
  16  * File: baseband.c
  17  *
  18  * Purpose: Implement functions to access baseband
  19  *
  20  * Author: Yiching Chen
  21  *
  22  * Date: May 20, 2004
  23  *
  24  * Functions:
  25  *
  26  * Revision History:
  27  *
  28  */
  29
  30 #include <linux/compiler.h>
  31 #include "firmware.h"
  32 #include "usbpipe.h"
  33
  34 #define FIRMWARE_VERSION        0x133           /* version 1.51 */
  35 #define FIRMWARE_NAME           "vntwusb.fw"
  36
  37 #define FIRMWARE_CHUNK_SIZE     0x400
  38
  39 int vnt_download_firmware(struct vnt_private *priv)
  40 {
  41         struct device *dev = &priv->usb->dev;
  42         const struct firmware *fw;
  43         int status;
  44         void *buffer = NULL;
  45         bool result = false;
  46         u16 length;
  47         int ii, rc;
  48
  49         dev_dbg(dev, "---->Download firmware\n");
  50
  51         rc = request_firmware(&fw, FIRMWARE_NAME, dev);
  52         if (rc) {
  53                 dev_err(dev, "firmware file %s request failed (%d)\n",
  54                         FIRMWARE_NAME, rc);
  55                         goto out;
  56         }
  57
  58         buffer = kmalloc(FIRMWARE_CHUNK_SIZE, GFP_KERNEL);
  59         if (!buffer)
  60                 goto free_fw;
  61
  62         for (ii = 0; ii < fw->size; ii += FIRMWARE_CHUNK_SIZE) {
  63                 length = min_t(int, fw->size - ii, FIRMWARE_CHUNK_SIZE);
  64                 memcpy(buffer, fw->data + ii, length);
  65
  66                 status = vnt_control_out(priv,
  67                                          0,
  68                                          0x1200 + ii,
  69                                          0x0000,
  70                                          length,
  71                                          buffer);
  72
  73                 dev_dbg(dev, "Download firmware...%d %zu\n", ii, fw->size);
  74
  75                 if (status != STATUS_SUCCESS)
  76                         goto free_fw;
  77         }
  78
  79         result = true;
  80 free_fw:
  81         release_firmware(fw);
  82
  83 out:
  84         kfree(buffer);
  85
  86         return result;
  87 }
  88 MODULE_FIRMWARE(FIRMWARE_NAME);
  89
  90 int vnt_firmware_branch_to_sram(struct vnt_private *priv)
  91 {
  92         int status;
  93
  94         dev_dbg(&priv->usb->dev, "---->Branch to Sram\n");
  95
  96         status = vnt_control_out(priv,
  97                                  1,
  98                                  0x1200,
  99                                  0x0000,
 100                                  0,
 101                                  NULL);
 102         return status == STATUS_SUCCESS;
 103 }
 104
 105 int vnt_check_firmware_version(struct vnt_private *priv)
 106 {
 107         int status;
 108
 109         status = vnt_control_in(priv,
 110                                 MESSAGE_TYPE_READ,
 111                                 0,
 112                                 MESSAGE_REQUEST_VERSION,
 113                                 2,
 114                                 (u8 *)&priv->firmware_version);
 115
 116         dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
 117                 priv->firmware_version);
 118
 119         if (status != STATUS_SUCCESS) {
 120                 dev_dbg(&priv->usb->dev, "Firmware Invalid.\n");
 121                 return false;
 122         }
 123         if (priv->firmware_version == 0xFFFF) {
 124                 dev_dbg(&priv->usb->dev, "In Loader.\n");
 125                 return false;
 126         }
 127
 128         dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
 129                 priv->firmware_version);
 130
 131         if (priv->firmware_version < FIRMWARE_VERSION) {
 132                 /* branch to loader for download new firmware */
 133                 vnt_firmware_branch_to_sram(priv);
 134                 return false;
 135         }
 136         return true;
 137 }