[linux-2.6-block.git] / drivers / media / usb / dvb-usb-v2 / cypress_firmware.c

/*  cypress_firmware.c is part of the DVB USB library.
 *
 * Copyright (C) 2004-6 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.
 *
 */

#include "dvb_usb.h"
#include "cypress_firmware.h"

struct usb_cypress_controller {
	u8 id;
	const char *name;	/* name of the usb controller */
	u16 cs_reg;		/* needs to be restarted,
				 * when the firmware has been downloaded */
};

static const struct usb_cypress_controller cypress[] = {
	{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
	{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
	{ .id = CYPRESS_FX2,    .name = "Cypress FX2",    .cs_reg = 0xe600 },
};

/*
 * load a firmware packet to the device
 */
static int usb_cypress_writemem(struct usb_device *udev, u16 addr, u8 *data,
		u8 len)
{
	dvb_usb_dbg_usb_control_msg(udev,
			0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len);

	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
}

int usbv2_cypress_load_firmware(struct usb_device *udev,
		const struct firmware *fw, int type)
{
	struct hexline *hx;
	int ret, pos = 0;

	hx = kmalloc(sizeof(struct hexline), GFP_KERNEL);
	if (!hx) {
		dev_err(&udev->dev, "%s: kmalloc() failed\n", KBUILD_MODNAME);
		return -ENOMEM;
	}

	/* stop the CPU */
	hx->data[0] = 1;
	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
	if (ret != 1) {
		dev_err(&udev->dev, "%s: CPU stop failed=%d\n",
				KBUILD_MODNAME, ret);
		ret = -EIO;
		goto err_kfree;
	}

	/* write firmware to memory */
	for (;;) {
		ret = dvb_usbv2_get_hexline(fw, hx, &pos);
		if (ret < 0)
			goto err_kfree;
		else if (ret == 0)
			break;

		ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
		if (ret < 0) {
			goto err_kfree;
		} else if (ret != hx->len) {
			dev_err(&udev->dev, "%s: error while transferring " \
					"firmware (transferred size=%d, " \
					"block size=%d)\n",
					KBUILD_MODNAME, ret, hx->len);
			ret = -EIO;
			goto err_kfree;
		}
	}

	/* start the CPU */
	hx->data[0] = 0;
	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
	if (ret != 1) {
		dev_err(&udev->dev, "%s: CPU start failed=%d\n",
				KBUILD_MODNAME, ret);
		ret = -EIO;
		goto err_kfree;
	}

	ret = 0;
err_kfree:
	kfree(hx);
	return ret;
}
EXPORT_SYMBOL(usbv2_cypress_load_firmware);

int dvb_usbv2_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);
	}

	memcpy(hx->data, &b[data_offs], hx->len);
	hx->chk = b[hx->len + data_offs];
	*pos += hx->len + 5;

	return *pos;
}
EXPORT_SYMBOL(dvb_usbv2_get_hexline);

MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Cypress firmware download");
MODULE_LICENSE("GPL");
Commit	Line	Data
355b4b2b	1	/* cypress_firmware.c is part of the DVB USB library.
b00a9018 AP	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
	7	* and 2 based devices.
	8	*
	9	*/
	10
	11	#include "dvb_usb.h"
355b4b2b	12	#include "cypress_firmware.h"
b00a9018 AP	13
	14	struct usb_cypress_controller {
	15	u8 id;
	16	const char name; / name of the usb controller */
	17	u16 cs_reg; /* needs to be restarted,
	18	* when the firmware has been downloaded */
	19	};
	20
	21	static const struct usb_cypress_controller cypress[] = {
	22	{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
	23	{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
	24	{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cs_reg = 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,
	31	u8 len)
	32	{
d6f35c71 AP	33	dvb_usb_dbg_usb_control_msg(udev,
	34	0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len);
	35
b00a9018 AP	36	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
	37	0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
	38	}
	39
	40	int usbv2_cypress_load_firmware(struct usb_device *udev,
	41	const struct firmware *fw, int type)
	42	{
2347e683	43	struct hexline *hx;
b00a9018 AP	44	int ret, pos = 0;
b00a9018 AP	45
2347e683 AP	46	hx = kmalloc(sizeof(struct hexline), GFP_KERNEL);
	47	if (!hx) {
	48	dev_err(&udev->dev, "%s: kmalloc() failed\n", KBUILD_MODNAME);
	49	return -ENOMEM;
	50	}
	51
b00a9018	52	/* stop the CPU */
2347e683 AP	53	hx->data[0] = 1;
	54	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
	55	if (ret != 1) {
	56	dev_err(&udev->dev, "%s: CPU stop failed=%d\n",
	57	KBUILD_MODNAME, ret);
	58	ret = -EIO;
	59	goto err_kfree;
	60	}
	61
	62	/* write firmware to memory */
	63	for (;;) {
	64	ret = dvb_usbv2_get_hexline(fw, hx, &pos);
	65	if (ret < 0)
	66	goto err_kfree;
	67	else if (ret == 0)
	68	break;
	69
	70	ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
	71	if (ret < 0) {
	72	goto err_kfree;
	73	} else if (ret != hx->len) {
d6f35c71 AP	74	dev_err(&udev->dev, "%s: error while transferring " \
	75	"firmware (transferred size=%d, " \
	76	"block size=%d)\n",
2347e683 AP	77	KBUILD_MODNAME, ret, hx->len);
	78	ret = -EIO;
	79	goto err_kfree;
b00a9018 AP	80	}
b00a9018 AP	81	}
b00a9018	82
2347e683 AP	83	/* start the CPU */
	84	hx->data[0] = 0;
	85	ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
	86	if (ret != 1) {
	87	dev_err(&udev->dev, "%s: CPU start failed=%d\n",
	88	KBUILD_MODNAME, ret);
b00a9018	89	ret = -EIO;
2347e683 AP	90	goto err_kfree;
2347e683 AP	91	}
b00a9018	92
2347e683 AP	93	ret = 0;
	94	err_kfree:
	95	kfree(hx);
b00a9018 AP	96	return ret;
	97	}
	98	EXPORT_SYMBOL(usbv2_cypress_load_firmware);
	99
	100	int dvb_usbv2_get_hexline(const struct firmware fw, struct hexline hx,
	101	int *pos)
	102	{
	103	u8 b = (u8 ) &fw->data[*pos];
	104	int data_offs = 4;
	105
	106	if (*pos >= fw->size)
	107	return 0;
	108
	109	memset(hx, 0, sizeof(struct hexline));
b00a9018 AP	110	hx->len = b[0];
	111
	112	if ((*pos + hx->len + 4) >= fw->size)
	113	return -EINVAL;
	114
	115	hx->addr = b[1] \| (b[2] << 8);
	116	hx->type = b[3];
	117
	118	if (hx->type == 0x04) {
	119	/* b[4] and b[5] are the Extended linear address record data
	120	* field */
	121	hx->addr \|= (b[4] << 24) \| (b[5] << 16);
b00a9018	122	}
2347e683	123
b00a9018 AP	124	memcpy(hx->data, &b[data_offs], hx->len);
b00a9018 AP	125	hx->chk = b[hx->len + data_offs];
b00a9018 AP	126	*pos += hx->len + 5;
	127
	128	return *pos;
	129	}
	130	EXPORT_SYMBOL(dvb_usbv2_get_hexline);
	131
	132	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
	133	MODULE_DESCRIPTION("Cypress firmware download");
	134	MODULE_LICENSE("GPL");