| Johannes Stezenbach | 776338e | 2005-06-23 22:02:35 -0700 | [diff] [blame^] | 1 | /* dvb-usb-firmware.c is part of the DVB USB library. |
| 2 | * |
| 3 | * Copyright (C) 2004-5 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/firmware.h> |
| 13 | #include <linux/usb.h> |
| 14 | |
| 15 | struct usb_cypress_controller { |
| 16 | int id; |
| 17 | const char *name; /* name of the usb controller */ |
| 18 | u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */ |
| 19 | }; |
| 20 | |
| 21 | static struct usb_cypress_controller cypress[] = { |
| 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 | */ |
| 30 | static 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, 5*HZ); |
| 34 | } |
| 35 | |
| 36 | int usb_cypress_load_firmware(struct usb_device *udev, const char *filename, int type) |
| 37 | { |
| 38 | const struct firmware *fw = NULL; |
| 39 | u16 addr; |
| 40 | u8 *b,*p; |
| 41 | int ret = 0,i; |
| 42 | |
| 43 | if ((ret = request_firmware(&fw, filename, &udev->dev)) != 0) { |
| 44 | err("did not find the firmware file. (%s) " |
| 45 | "Please see linux/Documentation/dvb/ for more details on firmware-problems.", |
| 46 | filename); |
| 47 | return ret; |
| 48 | } |
| 49 | |
| 50 | info("downloading firmware from file '%s' to the '%s'",filename,cypress[type].name); |
| 51 | |
| 52 | p = kmalloc(fw->size,GFP_KERNEL); |
| 53 | if (p != NULL) { |
| 54 | u8 reset; |
| 55 | /* |
| 56 | * you cannot use the fw->data as buffer for |
| 57 | * usb_control_msg, a new buffer has to be |
| 58 | * created |
| 59 | */ |
| 60 | memcpy(p,fw->data,fw->size); |
| 61 | |
| 62 | /* stop the CPU */ |
| 63 | reset = 1; |
| 64 | if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1) |
| 65 | err("could not stop the USB controller CPU."); |
| 66 | for(i = 0; p[i+3] == 0 && i < fw->size; ) { |
| 67 | b = (u8 *) &p[i]; |
| 68 | addr = cpu_to_le16( *((u16 *) &b[1]) ); |
| 69 | |
| 70 | deb_fw("writing to address 0x%04x (buffer: 0x%02x%02x)\n",addr,b[1],b[2]); |
| 71 | |
| 72 | ret = usb_cypress_writemem(udev,addr,&b[4],b[0]); |
| 73 | |
| 74 | if (ret != b[0]) { |
| 75 | err("error while transferring firmware " |
| 76 | "(transferred size: %d, block size: %d)", |
| 77 | ret,b[0]); |
| 78 | ret = -EINVAL; |
| 79 | break; |
| 80 | } |
| 81 | i += 5 + b[0]; |
| 82 | } |
| 83 | /* length in ret */ |
| 84 | if (ret > 0) |
| 85 | ret = 0; |
| 86 | /* restart the CPU */ |
| 87 | reset = 0; |
| 88 | if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) { |
| 89 | err("could not restart the USB controller CPU."); |
| 90 | ret = -EINVAL; |
| 91 | } |
| 92 | |
| 93 | kfree(p); |
| 94 | } else { |
| 95 | ret = -ENOMEM; |
| 96 | } |
| 97 | release_firmware(fw); |
| 98 | |
| 99 | return ret; |
| 100 | } |