diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb/dvb-usb-firmware.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb/dvb-usb-firmware.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-firmware.c b/drivers/media/usb/dvb-usb/dvb-usb-firmware.c new file mode 100644 index 000000000..0fb3fa610 --- /dev/null +++ b/drivers/media/usb/dvb-usb/dvb-usb-firmware.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0 +/* dvb-usb-firmware.c is part of the DVB USB library. + * + * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.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 }, +}; + +/* + * 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 *buf; + int ret, pos = 0; + u16 cpu_cs_register = cypress[type].cpu_cs_register; + + buf = kmalloc(sizeof(*hx), GFP_KERNEL); + if (!buf) + return -ENOMEM; + hx = (struct hexline *)buf; + + /* stop the CPU */ + buf[0] = 1; + if (usb_cypress_writemem(udev, cpu_cs_register, buf, 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); + kfree(buf); + return ret; + } + + if (ret == 0) { + /* restart the CPU */ + buf[0] = 0; + if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1) { + err("could not restart the USB controller CPU."); + ret = -EINVAL; + } + } else + ret = -EIO; + + kfree(buf); + + return ret; +} +EXPORT_SYMBOL(usb_cypress_load_firmware); + +int dvb_usb_download_firmware(struct usb_device *udev, + const struct dvb_usb_device_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' (status %d). You can use <kernel_dir>/scripts/get_dvb_firmware to get the firmware", + 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; +} + +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 = b[1] | (b[2] << 8); + 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; +} +EXPORT_SYMBOL(dvb_usb_get_hexline); |