diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/dvb-usb-firmware.c')
-rw-r--r-- | drivers/media/dvb/dvb-usb/dvb-usb-firmware.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-firmware.c b/drivers/media/dvb/dvb-usb/dvb-usb-firmware.c new file mode 100644 index 0000000..5244e39 --- /dev/null +++ b/drivers/media/dvb/dvb-usb/dvb-usb-firmware.c @@ -0,0 +1,100 @@ +/* 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/firmware.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 = 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 }, +}; + +/* + * 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, 5*HZ); +} + +int usb_cypress_load_firmware(struct usb_device *udev, const char *filename, int type) +{ + const struct firmware *fw = NULL; + u16 addr; + u8 *b,*p; + int ret = 0,i; + + if ((ret = request_firmware(&fw, filename, &udev->dev)) != 0) { + err("did not find the firmware file. (%s) " + "Please see linux/Documentation/dvb/ for more details on firmware-problems.", + filename); + return ret; + } + + info("downloading firmware from file '%s' to the '%s'",filename,cypress[type].name); + + p = kmalloc(fw->size,GFP_KERNEL); + if (p != NULL) { + u8 reset; + /* + * you cannot use the fw->data as buffer for + * usb_control_msg, a new buffer has to be + * created + */ + memcpy(p,fw->data,fw->size); + + /* 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."); + for(i = 0; p[i+3] == 0 && i < fw->size; ) { + b = (u8 *) &p[i]; + addr = cpu_to_le16( *((u16 *) &b[1]) ); + + deb_fw("writing to address 0x%04x (buffer: 0x%02x%02x)\n",addr,b[1],b[2]); + + ret = usb_cypress_writemem(udev,addr,&b[4],b[0]); + + if (ret != b[0]) { + err("error while transferring firmware " + "(transferred size: %d, block size: %d)", + ret,b[0]); + ret = -EINVAL; + break; + } + i += 5 + b[0]; + } + /* length in ret */ + if (ret > 0) + 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; + } + + kfree(p); + } else { + ret = -ENOMEM; + } + release_firmware(fw); + + return ret; +} |