| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * dvb-dibusb-firmware.c is part of the driver for mobile USB Budget DVB-T devices |
| 3 | * based on reference design made by DiBcom (http://www.dibcom.fr/) |
| 4 | * |
| 5 | * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) |
| 6 | * |
| 7 | * see dvb-dibusb-core.c for more copyright details. |
| 8 | * |
| 9 | * This file contains functions for downloading the firmware to the device. |
| 10 | */ |
| 11 | #include "dvb-dibusb.h" |
| 12 | |
| 13 | #include <linux/firmware.h> |
| 14 | #include <linux/usb.h> |
| 15 | |
| 16 | /* |
| 17 | * load a firmware packet to the device |
| 18 | */ |
| 19 | static int dibusb_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len) |
| 20 | { |
| 21 | return usb_control_msg(udev, usb_sndctrlpipe(udev,0), |
| 22 | 0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000); |
| 23 | } |
| 24 | |
| 25 | int dibusb_loadfirmware(struct usb_device *udev, struct dibusb_usb_device *dibdev) |
| 26 | { |
| 27 | const struct firmware *fw = NULL; |
| 28 | u16 addr; |
| 29 | u8 *b,*p; |
| 30 | int ret = 0,i; |
| 31 | |
| 32 | if ((ret = request_firmware(&fw, dibdev->dev_cl->firmware, &udev->dev)) != 0) { |
| 33 | err("did not find the firmware file. (%s) " |
| 34 | "Please see linux/Documentation/dvb/ for more details on firmware-problems.", |
| 35 | dibdev->dev_cl->firmware); |
| 36 | return ret; |
| 37 | } |
| 38 | |
| 39 | info("downloading firmware from file '%s'.",dibdev->dev_cl->firmware); |
| 40 | |
| 41 | p = kmalloc(fw->size,GFP_KERNEL); |
| 42 | if (p != NULL) { |
| 43 | u8 reset; |
| 44 | /* |
| 45 | * you cannot use the fw->data as buffer for |
| 46 | * usb_control_msg, a new buffer has to be |
| 47 | * created |
| 48 | */ |
| 49 | memcpy(p,fw->data,fw->size); |
| 50 | |
| 51 | /* stop the CPU */ |
| 52 | reset = 1; |
| 53 | if ((ret = dibusb_writemem(udev,dibdev->dev_cl->usb_ctrl->cpu_cs_register,&reset,1)) != 1) |
| 54 | err("could not stop the USB controller CPU."); |
| 55 | for(i = 0; p[i+3] == 0 && i < fw->size; ) { |
| 56 | b = (u8 *) &p[i]; |
| 57 | addr = *((u16 *) &b[1]); |
| 58 | |
| 59 | ret = dibusb_writemem(udev,addr,&b[4],b[0]); |
| 60 | |
| 61 | if (ret != b[0]) { |
| 62 | err("error while transferring firmware " |
| 63 | "(transferred size: %d, block size: %d)", |
| 64 | ret,b[0]); |
| 65 | ret = -EINVAL; |
| 66 | break; |
| 67 | } |
| 68 | i += 5 + b[0]; |
| 69 | } |
| 70 | /* length in ret */ |
| 71 | if (ret > 0) |
| 72 | ret = 0; |
| 73 | /* restart the CPU */ |
| 74 | reset = 0; |
| 75 | if (ret || dibusb_writemem(udev,dibdev->dev_cl->usb_ctrl->cpu_cs_register,&reset,1) != 1) { |
| 76 | err("could not restart the USB controller CPU."); |
| 77 | ret = -EINVAL; |
| 78 | } |
| 79 | |
| 80 | kfree(p); |
| 81 | } else { |
| 82 | ret = -ENOMEM; |
| 83 | } |
| 84 | release_firmware(fw); |
| 85 | |
| 86 | return ret; |
| 87 | } |