155 lines
4 KiB
C
155 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* dvb-usb-firmware.c is part of the DVB USB library.
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*
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* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
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* see dvb-usb-init.c for copyright information.
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*
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* This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices.
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*
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* FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
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*/
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#include "dvb-usb-common.h"
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#include <linux/usb.h>
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struct usb_cypress_controller {
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int id;
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const char *name; /* name of the usb controller */
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u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */
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};
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static struct usb_cypress_controller cypress[] = {
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{ .id = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 },
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{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cpu_cs_register = 0x7f92 },
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{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cpu_cs_register = 0x7f92 },
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{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cpu_cs_register = 0xe600 },
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};
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/*
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* load a firmware packet to the device
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*/
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static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)
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{
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return usb_control_msg(udev, usb_sndctrlpipe(udev,0),
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0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
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}
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int usb_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type)
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{
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struct hexline *hx;
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u8 *buf;
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int ret, pos = 0;
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u16 cpu_cs_register = cypress[type].cpu_cs_register;
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buf = kmalloc(sizeof(*hx), GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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hx = (struct hexline *)buf;
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/* stop the CPU */
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buf[0] = 1;
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if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1)
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err("could not stop the USB controller CPU.");
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while ((ret = dvb_usb_get_hexline(fw, hx, &pos)) > 0) {
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deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n", hx->addr, hx->len, hx->chk);
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ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
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if (ret != hx->len) {
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err("error while transferring firmware (transferred size: %d, block size: %d)",
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ret, hx->len);
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ret = -EINVAL;
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break;
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}
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}
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if (ret < 0) {
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err("firmware download failed at %d with %d",pos,ret);
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kfree(buf);
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return ret;
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}
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if (ret == 0) {
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/* restart the CPU */
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buf[0] = 0;
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if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1) {
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err("could not restart the USB controller CPU.");
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ret = -EINVAL;
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}
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} else
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ret = -EIO;
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kfree(buf);
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return ret;
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}
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EXPORT_SYMBOL(usb_cypress_load_firmware);
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int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_device_properties *props)
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{
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int ret;
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const struct firmware *fw = NULL;
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if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {
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err("did not find the firmware file '%s' (status %d). You can use <kernel_dir>/scripts/get_dvb_firmware to get the firmware",
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props->firmware,ret);
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return ret;
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}
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info("downloading firmware from file '%s'",props->firmware);
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switch (props->usb_ctrl) {
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case CYPRESS_AN2135:
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case CYPRESS_AN2235:
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case CYPRESS_FX2:
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ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl);
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break;
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case DEVICE_SPECIFIC:
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if (props->download_firmware)
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ret = props->download_firmware(udev,fw);
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else {
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err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");
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ret = -EINVAL;
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}
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break;
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default:
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ret = -EINVAL;
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break;
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}
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release_firmware(fw);
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return ret;
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}
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int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx,
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int *pos)
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{
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u8 *b = (u8 *) &fw->data[*pos];
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int data_offs = 4;
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if (*pos >= fw->size)
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return 0;
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memset(hx,0,sizeof(struct hexline));
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hx->len = b[0];
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if ((*pos + hx->len + 4) >= fw->size)
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return -EINVAL;
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hx->addr = b[1] | (b[2] << 8);
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hx->type = b[3];
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if (hx->type == 0x04) {
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/* b[4] and b[5] are the Extended linear address record data field */
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hx->addr |= (b[4] << 24) | (b[5] << 16);
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/* hx->len -= 2;
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data_offs += 2; */
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}
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memcpy(hx->data,&b[data_offs],hx->len);
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hx->chk = b[hx->len + data_offs];
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*pos += hx->len + 5;
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return *pos;
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}
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EXPORT_SYMBOL(dvb_usb_get_hexline);
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