/* dvb-usb-firmware.c is part of the DVB USB library. * * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) * see dvb-usb-init.c for copyright information. * * This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices. * * FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem. */ #include "dvb-usb-common.h" #include <linux/usb.h> struct usb_cypress_controller { int id; const char *name; /* name of the usb controller */ u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */ }; static struct usb_cypress_controller cypress[] = { { .id = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 }, { .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cpu_cs_register = 0x7f92 }, { .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cpu_cs_register = 0x7f92 }, { .id = CYPRESS_FX2, .name = "Cypress FX2", .cpu_cs_register = 0xe600 }, }; static int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx, int *pos); /* * load a firmware packet to the device */ static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len) { return usb_control_msg(udev, usb_sndctrlpipe(udev,0), 0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000); } int usb_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type) { struct hexline hx; u8 reset; int ret,pos=0; /* stop the CPU */ reset = 1; if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1) err("could not stop the USB controller CPU."); while ((ret = dvb_usb_get_hexline(fw,&hx,&pos)) > 0) { deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n",hx.addr,hx.len,hx.chk); ret = usb_cypress_writemem(udev,hx.addr,hx.data,hx.len); if (ret != hx.len) { err("error while transferring firmware " "(transferred size: %d, block size: %d)", ret,hx.len); ret = -EINVAL; break; } } if (ret < 0) { err("firmware download failed at %d with %d",pos,ret); return ret; } if (ret == 0) { /* restart the CPU */ reset = 0; if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) { err("could not restart the USB controller CPU."); ret = -EINVAL; } } else ret = -EIO; return ret; } EXPORT_SYMBOL(usb_cypress_load_firmware); int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_properties *props) { int ret; const struct firmware *fw = NULL; if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) { err("did not find the firmware file. (%s) " "Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)", props->firmware,ret); return ret; } info("downloading firmware from file '%s'",props->firmware); switch (props->usb_ctrl) { case CYPRESS_AN2135: case CYPRESS_AN2235: case CYPRESS_FX2: ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl); break; case DEVICE_SPECIFIC: if (props->download_firmware) ret = props->download_firmware(udev,fw); else { err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one."); ret = -EINVAL; } break; default: ret = -EINVAL; break; } release_firmware(fw); return ret; } static int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx, int *pos) { u8 *b = (u8 *) &fw->data[*pos]; int data_offs = 4; if (*pos >= fw->size) return 0; memset(hx,0,sizeof(struct hexline)); hx->len = b[0]; if ((*pos + hx->len + 4) >= fw->size) return -EINVAL; hx->addr = le16_to_cpu( *((u16 *) &b[1]) ); hx->type = b[3]; if (hx->type == 0x04) { /* b[4] and b[5] are the Extended linear address record data field */ hx->addr |= (b[4] << 24) | (b[5] << 16); /* hx->len -= 2; data_offs += 2; */ } memcpy(hx->data,&b[data_offs],hx->len); hx->chk = b[hx->len + data_offs]; *pos += hx->len + 5; return *pos; }