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
vnt_download_firmware(struct vnt_private * priv)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 = request_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 MODULE_FIRMWARE(FIRMWARE_NAME);
73
vnt_firmware_branch_to_sram(struct vnt_private * priv)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
vnt_check_firmware_version(struct vnt_private * priv)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 }
117