tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
39int 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;
80free_fw:
81 release_firmware(fw);
82
83out:
84 kfree(buffer);
85
86 return result;
87}
88MODULE_FIRMWARE(FIRMWARE_NAME);
89
90int 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
105int 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}