1 /* dvb-usb-firmware.c is part of the DVB USB library. 2 * 3 * Copyright (C) 2004-6 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/usb.h> 13 14 struct usb_cypress_controller { 15 int id; 16 const char *name; /* name of the usb controller */ 17 u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */ 18 }; 19 20 static struct usb_cypress_controller cypress[] = { 21 { .id = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 }, 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, 5000); 34 } 35 36 int usb_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type) 37 { 38 struct hexline hx; 39 u8 reset; 40 int ret,pos=0; 41 42 /* stop the CPU */ 43 reset = 1; 44 if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1) 45 err("could not stop the USB controller CPU."); 46 47 while ((ret = dvb_usb_get_hexline(fw,&hx,&pos)) > 0) { 48 deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n",hx.addr,hx.len,hx.chk); 49 ret = usb_cypress_writemem(udev,hx.addr,hx.data,hx.len); 50 51 if (ret != hx.len) { 52 err("error while transferring firmware " 53 "(transferred size: %d, block size: %d)", 54 ret,hx.len); 55 ret = -EINVAL; 56 break; 57 } 58 } 59 if (ret < 0) { 60 err("firmware download failed at %d with %d",pos,ret); 61 return ret; 62 } 63 64 if (ret == 0) { 65 /* restart the CPU */ 66 reset = 0; 67 if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) { 68 err("could not restart the USB controller CPU."); 69 ret = -EINVAL; 70 } 71 } else 72 ret = -EIO; 73 74 return ret; 75 } 76 EXPORT_SYMBOL(usb_cypress_load_firmware); 77 78 int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_device_properties *props) 79 { 80 int ret; 81 const struct firmware *fw = NULL; 82 83 if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) { 84 err("did not find the firmware file. (%s) " 85 "Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)", 86 props->firmware,ret); 87 return ret; 88 } 89 90 info("downloading firmware from file '%s'",props->firmware); 91 92 switch (props->usb_ctrl) { 93 case CYPRESS_AN2135: 94 case CYPRESS_AN2235: 95 case CYPRESS_FX2: 96 ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl); 97 break; 98 case DEVICE_SPECIFIC: 99 if (props->download_firmware) 100 ret = props->download_firmware(udev,fw); 101 else { 102 err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one."); 103 ret = -EINVAL; 104 } 105 break; 106 default: 107 ret = -EINVAL; 108 break; 109 } 110 111 release_firmware(fw); 112 return ret; 113 } 114 115 int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx, 116 int *pos) 117 { 118 u8 *b = (u8 *) &fw->data[*pos]; 119 int data_offs = 4; 120 if (*pos >= fw->size) 121 return 0; 122 123 memset(hx,0,sizeof(struct hexline)); 124 125 hx->len = b[0]; 126 127 if ((*pos + hx->len + 4) >= fw->size) 128 return -EINVAL; 129 130 hx->addr = b[1] | (b[2] << 8); 131 hx->type = b[3]; 132 133 if (hx->type == 0x04) { 134 /* b[4] and b[5] are the Extended linear address record data field */ 135 hx->addr |= (b[4] << 24) | (b[5] << 16); 136 /* hx->len -= 2; 137 data_offs += 2; */ 138 } 139 memcpy(hx->data,&b[data_offs],hx->len); 140 hx->chk = b[hx->len + data_offs]; 141 142 *pos += hx->len + 5; 143 144 return *pos; 145 } 146 EXPORT_SYMBOL(dvb_usb_get_hexline); 147