source: src/linux/universal/linux-3.18/drivers/media/usb/dvb-usb/dvb-usb-firmware.c @ 31885

Last change on this file since 31885 was 31885, checked in by brainslayer, 3 months ago

update

File size: 4.0 KB
Line 
1/* dvb-usb-firmware.c is part of the DVB USB library.
2 *
3 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
4 * see dvb-usb-init.c for copyright information.
5 *
6 * This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices.
7 *
8 * FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
9 */
10#include "dvb-usb-common.h"
11
12#include <linux/usb.h>
13
14struct usb_cypress_controller {
15        int id;
16        const char *name;       /* name of the usb controller */
17        u16 cpu_cs_register;    /* needs to be restarted, when the firmware has been downloaded. */
18};
19
20static struct usb_cypress_controller cypress[] = {
21        { .id = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 },
22        { .id = CYPRESS_AN2135,  .name = "Cypress AN2135",  .cpu_cs_register = 0x7f92 },
23        { .id = CYPRESS_AN2235,  .name = "Cypress AN2235",  .cpu_cs_register = 0x7f92 },
24        { .id = CYPRESS_FX2,     .name = "Cypress FX2",     .cpu_cs_register = 0xe600 },
25};
26
27/*
28 * load a firmware packet to the device
29 */
30static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)
31{
32        return usb_control_msg(udev, usb_sndctrlpipe(udev,0),
33                        0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
34}
35
36int usb_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type)
37{
38        struct hexline *hx;
39        u8 *buf;
40        int ret, pos = 0;
41        u16 cpu_cs_register = cypress[type].cpu_cs_register;
42
43        buf = kmalloc(sizeof(*hx), GFP_KERNEL);
44        if (!buf)
45                return -ENOMEM;
46        hx = (struct hexline *)buf;
47
48        /* stop the CPU */
49        buf[0] = 1;
50        if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1)
51                err("could not stop the USB controller CPU.");
52
53        while ((ret = dvb_usb_get_hexline(fw, hx, &pos)) > 0) {
54                deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n", hx->addr, hx->len, hx->chk);
55                ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
56
57                if (ret != hx->len) {
58                        err("error while transferring firmware "
59                                "(transferred size: %d, block size: %d)",
60                                ret, hx->len);
61                        ret = -EINVAL;
62                        break;
63                }
64        }
65        if (ret < 0) {
66                err("firmware download failed at %d with %d",pos,ret);
67                kfree(buf);
68                return ret;
69        }
70
71        if (ret == 0) {
72                /* restart the CPU */
73                buf[0] = 0;
74                if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1) {
75                        err("could not restart the USB controller CPU.");
76                        ret = -EINVAL;
77                }
78        } else
79                ret = -EIO;
80
81        kfree(buf);
82
83        return ret;
84}
85EXPORT_SYMBOL(usb_cypress_load_firmware);
86
87int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_device_properties *props)
88{
89        int ret;
90        const struct firmware *fw = NULL;
91
92        if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {
93                err("did not find the firmware file. (%s) "
94                        "Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
95                        props->firmware,ret);
96                return ret;
97        }
98
99        info("downloading firmware from file '%s'",props->firmware);
100
101        switch (props->usb_ctrl) {
102                case CYPRESS_AN2135:
103                case CYPRESS_AN2235:
104                case CYPRESS_FX2:
105                        ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl);
106                        break;
107                case DEVICE_SPECIFIC:
108                        if (props->download_firmware)
109                                ret = props->download_firmware(udev,fw);
110                        else {
111                                err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");
112                                ret = -EINVAL;
113                        }
114                        break;
115                default:
116                        ret = -EINVAL;
117                        break;
118        }
119
120        release_firmware(fw);
121        return ret;
122}
123
124int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx,
125                               int *pos)
126{
127        u8 *b = (u8 *) &fw->data[*pos];
128        int data_offs = 4;
129        if (*pos >= fw->size)
130                return 0;
131
132        memset(hx,0,sizeof(struct hexline));
133
134        hx->len  = b[0];
135
136        if ((*pos + hx->len + 4) >= fw->size)
137                return -EINVAL;
138
139        hx->addr = b[1] | (b[2] << 8);
140        hx->type = b[3];
141
142        if (hx->type == 0x04) {
143                /* b[4] and b[5] are the Extended linear address record data field */
144                hx->addr |= (b[4] << 24) | (b[5] << 16);
145/*              hx->len -= 2;
146                data_offs += 2; */
147        }
148        memcpy(hx->data,&b[data_offs],hx->len);
149        hx->chk = b[hx->len + data_offs];
150
151        *pos += hx->len + 5;
152
153        return *pos;
154}
155EXPORT_SYMBOL(dvb_usb_get_hexline);
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