[mirror_ubuntu-artful-kernel.git] / drivers / media / usb / dvb-usb / dvb-usb-firmware.c

/* 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, 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) Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
			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);
Commit	Line	Data
776338e1 JS	1	/* dvb-usb-firmware.c is part of the DVB USB library.
776338e1 JS	2	*
99e44da7	3	* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
776338e1 JS	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
776338e1 JS	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[] = {
d3707add PB	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 },
776338e1 JS	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),
4302c15e	33	0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
776338e1 JS	34	}
776338e1 JS	35
f5373788	36	int usb_cypress_load_firmware(struct usb_device udev, const struct firmware fw, int type)
776338e1	37	{
43fab979	38	struct hexline *hx;
f9fa0f2b SB	39	u8 *buf;
	40	int ret, pos = 0;
	41	u16 cpu_cs_register = cypress[type].cpu_cs_register;
776338e1	42
f9fa0f2b SB	43	buf = kmalloc(sizeof(*hx), GFP_KERNEL);
f9fa0f2b SB	44	if (!buf)
43fab979	45	return -ENOMEM;
f9fa0f2b	46	hx = (struct hexline *)buf;
43fab979	47
d3707add	48	/* stop the CPU */
f9fa0f2b SB	49	buf[0] = 1;
f9fa0f2b SB	50	if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1)
d3707add PB	51	err("could not stop the USB controller CPU.");
d3707add PB	52
43fab979 MCC	53	while ((ret = dvb_usb_get_hexline(fw, hx, &pos)) > 0) {
	54	deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n", hx->addr, hx->len, hx->chk);
	55	ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
d3707add	56
43fab979	57	if (ret != hx->len) {
f319ed91	58	err("error while transferring firmware (transferred size: %d, block size: %d)",
43fab979	59	ret, hx->len);
d3707add PB	60	ret = -EINVAL;
	61	break;
	62	}
	63	}
	64	if (ret < 0) {
	65	err("firmware download failed at %d with %d",pos,ret);
f9fa0f2b	66	kfree(buf);
776338e1 JS	67	return ret;
	68	}
	69
d3707add	70	if (ret == 0) {
776338e1	71	/* restart the CPU */
f9fa0f2b SB	72	buf[0] = 0;
f9fa0f2b SB	73	if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1) {
776338e1 JS	74	err("could not restart the USB controller CPU.");
	75	ret = -EINVAL;
	76	}
d3707add PB	77	} else
d3707add PB	78	ret = -EIO;
776338e1	79
f9fa0f2b	80	kfree(buf);
43fab979	81
d3707add PB	82	return ret;
d3707add PB	83	}
f5373788	84	EXPORT_SYMBOL(usb_cypress_load_firmware);
0029ee14	85
4d43e13f	86	int dvb_usb_download_firmware(struct usb_device udev, struct dvb_usb_device_properties props)
d3707add PB	87	{
	88	int ret;
	89	const struct firmware *fw = NULL;
	90
	91	if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {
f319ed91	92	err("did not find the firmware file. (%s) Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
d3707add PB	93	props->firmware,ret);
d3707add PB	94	return ret;
776338e1	95	}
776338e1	96
d3707add PB	97	info("downloading firmware from file '%s'",props->firmware);
	98
	99	switch (props->usb_ctrl) {
	100	case CYPRESS_AN2135:
	101	case CYPRESS_AN2235:
	102	case CYPRESS_FX2:
	103	ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl);
	104	break;
	105	case DEVICE_SPECIFIC:
	106	if (props->download_firmware)
	107	ret = props->download_firmware(udev,fw);
	108	else {
	109	err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");
	110	ret = -EINVAL;
	111	}
	112	break;
	113	default:
	114	ret = -EINVAL;
	115	break;
	116	}
	117
	118	release_firmware(fw);
776338e1 JS	119	return ret;
776338e1 JS	120	}
d3707add	121
136cafbf	122	int dvb_usb_get_hexline(const struct firmware fw, struct hexline hx,
a22a6865	123	int *pos)
d3707add PB	124	{
	125	u8 b = (u8 ) &fw->data[*pos];
	126	int data_offs = 4;
	127	if (*pos >= fw->size)
	128	return 0;
	129
	130	memset(hx,0,sizeof(struct hexline));
	131
	132	hx->len = b[0];
	133
	134	if ((*pos + hx->len + 4) >= fw->size)
	135	return -EINVAL;
	136
637007fe	137	hx->addr = b[1] \| (b[2] << 8);
d3707add PB	138	hx->type = b[3];
	139
	140	if (hx->type == 0x04) {
	141	/* b[4] and b[5] are the Extended linear address record data field */
	142	hx->addr \|= (b[4] << 24) \| (b[5] << 16);
	143	/* hx->len -= 2;
	144	data_offs += 2; */
	145	}
	146	memcpy(hx->data,&b[data_offs],hx->len);
	147	hx->chk = b[hx->len + data_offs];
	148
	149	*pos += hx->len + 5;
	150
	151	return *pos;
	152	}
136cafbf	153	EXPORT_SYMBOL(dvb_usb_get_hexline);