drivers/staging/vt6656/firmware.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   4  * All rights reserved.
   5  *
   6  * File: baseband.c
   7  *
   8  * Purpose: Implement functions to access baseband
   9  *
  10  * Author: Yiching Chen
  11  *
  12  * Date: May 20, 2004
  13  *
  14  * Functions:
  15  *
  16  * Revision History:
  17  *
  18  */
  19
  20 #include <linux/compiler.h>
  21 #include "firmware.h"
  22 #include "usbpipe.h"
  23
  24 #define FIRMWARE_VERSION        0x133           /* version 1.51 */
  25 #define FIRMWARE_NAME           "/*(DEBLOBBED)*/"
  26
  27 #define FIRMWARE_CHUNK_SIZE     0x400
  28
  29 int vnt_download_firmware(struct vnt_private *priv)
  30 {
  31         struct device *dev = &priv->usb->dev;
  32         const struct firmware *fw;
  33         void *buffer = NULL;
  34         u16 length;
  35         int ii;
  36         int ret = 0;
  37
  38         dev_dbg(dev, "---->Download firmware\n");
  39
  40         ret = reject_firmware(&fw, FIRMWARE_NAME, dev);
  41         if (ret) {
  42                 dev_err(dev, "firmware file %s request failed (%d)\n",
  43                         FIRMWARE_NAME, ret);
  44                 goto end;
  45         }
  46
  47         buffer = kmalloc(FIRMWARE_CHUNK_SIZE, GFP_KERNEL);
  48         if (!buffer) {
  49                 ret = -ENOMEM;
  50                 goto free_fw;
  51         }
  52
  53         for (ii = 0; ii < fw->size; ii += FIRMWARE_CHUNK_SIZE) {
  54                 length = min_t(int, fw->size - ii, FIRMWARE_CHUNK_SIZE);
  55                 memcpy(buffer, fw->data + ii, length);
  56
  57                 ret = vnt_control_out(priv, 0, 0x1200 + ii, 0x0000, length,
  58                                       buffer);
  59                 if (ret)
  60                         goto free_buffer;
  61
  62                 dev_dbg(dev, "Download firmware...%d %zu\n", ii, fw->size);
  63         }
  64
  65 free_buffer:
  66         kfree(buffer);
  67 free_fw:
  68         release_firmware(fw);
  69 end:
  70         return ret;
  71 }
  72 /*(DEBLOBBED)*/
  73
  74 int vnt_firmware_branch_to_sram(struct vnt_private *priv)
  75 {
  76         dev_dbg(&priv->usb->dev, "---->Branch to Sram\n");
  77
  78         return vnt_control_out(priv, 1, 0x1200, 0x0000, 0, NULL);
  79 }
  80
  81 int vnt_check_firmware_version(struct vnt_private *priv)
  82 {
  83         int ret = 0;
  84
  85         ret = vnt_control_in(priv, MESSAGE_TYPE_READ, 0,
  86                              MESSAGE_REQUEST_VERSION, 2,
  87                              (u8 *)&priv->firmware_version);
  88         if (ret) {
  89                 dev_dbg(&priv->usb->dev,
  90                         "Could not get firmware version: %d.\n", ret);
  91                 goto end;
  92         }
  93
  94         dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
  95                 priv->firmware_version);
  96
  97         if (priv->firmware_version == 0xFFFF) {
  98                 dev_dbg(&priv->usb->dev, "In Loader.\n");
  99                 ret = -EINVAL;
 100                 goto end;
 101         }
 102
 103         if (priv->firmware_version < FIRMWARE_VERSION) {
 104                 /* branch to loader for download new firmware */
 105                 ret = vnt_firmware_branch_to_sram(priv);
 106                 if (ret) {
 107                         dev_dbg(&priv->usb->dev,
 108                                 "Could not branch to SRAM: %d.\n", ret);
 109                 } else {
 110                         ret = -EINVAL;
 111                 }
 112         }
 113
 114 end:
 115         return ret;
 116 }