126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/* cypress_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@desy.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
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* and 2 based devices.
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*
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*/
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#include "dvb_usb.h"
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#include "cypress_firmware.h"
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struct usb_cypress_controller {
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u8 id;
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const char *name; /* name of the usb controller */
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u16 cs_reg; /* needs to be restarted,
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* when the firmware has been downloaded */
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};
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static const struct usb_cypress_controller cypress[] = {
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{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
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{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
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{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cs_reg = 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,
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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 usbv2_cypress_load_firmware(struct usb_device *udev,
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const struct firmware *fw, int type)
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{
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struct hexline hx;
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u8 reset;
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int ret, pos = 0;
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/* stop the CPU */
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reset = 1;
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ret = usb_cypress_writemem(udev, cypress[type].cs_reg, &reset, 1);
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if (ret != 1)
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pr_err("%s: could not stop the USB controller CPU",
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KBUILD_MODNAME);
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while ((ret = dvb_usbv2_get_hexline(fw, &hx, &pos)) > 0) {
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pr_debug("%s: writing to address %04x (buffer: %02x %02x)\n",
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__func__, 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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pr_err("%s: error while transferring firmware " \
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"(transferred size=%d, block size=%d)",
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KBUILD_MODNAME, 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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pr_err("%s: firmware download failed at %d with %d",
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KBUILD_MODNAME, pos, ret);
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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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reset = 0;
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if (ret || usb_cypress_writemem(
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udev, cypress[type].cs_reg, &reset, 1) != 1) {
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pr_err("%s: could not restart the USB controller CPU",
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KBUILD_MODNAME);
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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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return ret;
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}
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EXPORT_SYMBOL(usbv2_cypress_load_firmware);
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int dvb_usbv2_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
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* field */
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hx->addr |= (b[4] << 24) | (b[5] << 16);
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/*
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hx->len -= 2;
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data_offs += 2;
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*/
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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_usbv2_get_hexline);
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_DESCRIPTION("Cypress firmware download");
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MODULE_LICENSE("GPL");
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