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           "vntwusb.fw"
  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         int status;
  34         void *buffer = NULL;
  35         bool result = false;
  36         u16 length;
  37         int ii, rc;
  38
  39         dev_dbg(dev, "---->Download firmware\n");
  40
  41         rc = request_firmware(&fw, FIRMWARE_NAME, dev);
  42         if (rc) {
  43                 dev_err(dev, "firmware file %s request failed (%d)\n",
  44                         FIRMWARE_NAME, rc);
  45                         goto out;
  46         }
  47
  48         buffer = kmalloc(FIRMWARE_CHUNK_SIZE, GFP_KERNEL);
  49         if (!buffer)
  50                 goto free_fw;
  51
  52         for (ii = 0; ii < fw->size; ii += FIRMWARE_CHUNK_SIZE) {
  53                 length = min_t(int, fw->size - ii, FIRMWARE_CHUNK_SIZE);
  54                 memcpy(buffer, fw->data + ii, length);
  55
  56                 status = vnt_control_out(priv,
  57                                          0,
  58                                          0x1200 + ii,
  59                                          0x0000,
  60                                          length,
  61                                          buffer);
  62
  63                 dev_dbg(dev, "Download firmware...%d %zu\n", ii, fw->size);
  64
  65                 if (status != STATUS_SUCCESS)
  66                         goto free_fw;
  67         }
  68
  69         result = true;
  70 free_fw:
  71         release_firmware(fw);
  72
  73 out:
  74         kfree(buffer);
  75
  76         return result;
  77 }
  78 MODULE_FIRMWARE(FIRMWARE_NAME);
  79
  80 int vnt_firmware_branch_to_sram(struct vnt_private *priv)
  81 {
  82         int status;
  83
  84         dev_dbg(&priv->usb->dev, "---->Branch to Sram\n");
  85
  86         status = vnt_control_out(priv,
  87                                  1,
  88                                  0x1200,
  89                                  0x0000,
  90                                  0,
  91                                  NULL);
  92         return status == STATUS_SUCCESS;
  93 }
  94
  95 int vnt_check_firmware_version(struct vnt_private *priv)
  96 {
  97         int status;
  98
  99         status = vnt_control_in(priv,
 100                                 MESSAGE_TYPE_READ,
 101                                 0,
 102                                 MESSAGE_REQUEST_VERSION,
 103                                 2,
 104                                 (u8 *)&priv->firmware_version);
 105
 106         dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
 107                 priv->firmware_version);
 108
 109         if (status != STATUS_SUCCESS) {
 110                 dev_dbg(&priv->usb->dev, "Firmware Invalid.\n");
 111                 return false;
 112         }
 113         if (priv->firmware_version == 0xFFFF) {
 114                 dev_dbg(&priv->usb->dev, "In Loader.\n");
 115                 return false;
 116         }
 117
 118         dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
 119                 priv->firmware_version);
 120
 121         if (priv->firmware_version < FIRMWARE_VERSION) {
 122                 /* branch to loader for download new firmware */
 123                 vnt_firmware_branch_to_sram(priv);
 124                 return false;
 125         }
 126         return true;
 127 }