[mirror_ubuntu-artful-kernel.git] / drivers / media / usb / pvrusb2 / pvrusb2-eeprom.c

/*
 *
 *
 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
 *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 */

#include <linux/slab.h>
#include "pvrusb2-eeprom.h"
#include "pvrusb2-hdw-internal.h"
#include "pvrusb2-debug.h"

#define trace_eeprom(...) pvr2_trace(PVR2_TRACE_EEPROM,__VA_ARGS__)


/*

   Read and analyze data in the eeprom.  Use tveeprom to figure out
   the packet structure, since this is another Hauppauge device and
   internally it has a family resemblance to ivtv-type devices

*/

#include <media/tveeprom.h>

/* We seem to only be interested in the last 128 bytes of the EEPROM */
#define EEPROM_SIZE 128

/* Grab EEPROM contents, needed for direct method. */
static u8 *pvr2_eeprom_fetch(struct pvr2_hdw *hdw)
{
	struct i2c_msg msg[2];
	u8 *eeprom;
	u8 iadd[2];
	u8 addr;
	u16 eepromSize;
	unsigned int offs;
	int ret;
	int mode16 = 0;
	unsigned pcnt,tcnt;
	eeprom = kmalloc(EEPROM_SIZE,GFP_KERNEL);
	if (!eeprom) {
		pvr2_trace(PVR2_TRACE_ERROR_LEGS,
			   "Failed to allocate memory required to read eeprom");
		return NULL;
	}

	trace_eeprom("Value for eeprom addr from controller was 0x%x",
		     hdw->eeprom_addr);
	addr = hdw->eeprom_addr;
	/* Seems that if the high bit is set, then the *real* eeprom
	   address is shifted right now bit position (noticed this in
	   newer PVR USB2 hardware) */
	if (addr & 0x80) addr >>= 1;

	/* FX2 documentation states that a 16bit-addressed eeprom is
	   expected if the I2C address is an odd number (yeah, this is
	   strange but it's what they do) */
	mode16 = (addr & 1);
	eepromSize = (mode16 ? 4096 : 256);
	trace_eeprom("Examining %d byte eeprom at location 0x%x using %d bit addressing",
		     eepromSize, addr,
		     mode16 ? 16 : 8);

	msg[0].addr = addr;
	msg[0].flags = 0;
	msg[0].len = mode16 ? 2 : 1;
	msg[0].buf = iadd;
	msg[1].addr = addr;
	msg[1].flags = I2C_M_RD;

	/* We have to do the actual eeprom data fetch ourselves, because
	   (1) we're only fetching part of the eeprom, and (2) if we were
	   getting the whole thing our I2C driver can't grab it in one
	   pass - which is what tveeprom is otherwise going to attempt */
	memset(eeprom,0,EEPROM_SIZE);
	for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) {
		pcnt = 16;
		if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt;
		offs = tcnt + (eepromSize - EEPROM_SIZE);
		if (mode16) {
			iadd[0] = offs >> 8;
			iadd[1] = offs;
		} else {
			iadd[0] = offs;
		}
		msg[1].len = pcnt;
		msg[1].buf = eeprom+tcnt;
		if ((ret = i2c_transfer(&hdw->i2c_adap,
					msg,ARRAY_SIZE(msg))) != 2) {
			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
				   "eeprom fetch set offs err=%d",ret);
			kfree(eeprom);
			return NULL;
		}
	}
	return eeprom;
}


/* Directly call eeprom analysis function within tveeprom. */
int pvr2_eeprom_analyze(struct pvr2_hdw *hdw)
{
	u8 *eeprom;
	struct tveeprom tvdata;

	memset(&tvdata,0,sizeof(tvdata));

	eeprom = pvr2_eeprom_fetch(hdw);
	if (!eeprom) return -EINVAL;

	{
		struct i2c_client fake_client;
		/* Newer version expects a useless client interface */
		fake_client.addr = hdw->eeprom_addr;
		fake_client.adapter = &hdw->i2c_adap;
		tveeprom_hauppauge_analog(&fake_client,&tvdata,eeprom);
	}

	trace_eeprom("eeprom assumed v4l tveeprom module");
	trace_eeprom("eeprom direct call results:");
	trace_eeprom("has_radio=%d",tvdata.has_radio);
	trace_eeprom("tuner_type=%d",tvdata.tuner_type);
	trace_eeprom("tuner_formats=0x%x",tvdata.tuner_formats);
	trace_eeprom("audio_processor=%d",tvdata.audio_processor);
	trace_eeprom("model=%d",tvdata.model);
	trace_eeprom("revision=%d",tvdata.revision);
	trace_eeprom("serial_number=%d",tvdata.serial_number);
	trace_eeprom("rev_str=%s",tvdata.rev_str);
	hdw->tuner_type = tvdata.tuner_type;
	hdw->tuner_updated = !0;
	hdw->serial_number = tvdata.serial_number;
	hdw->std_mask_eeprom = tvdata.tuner_formats;

	kfree(eeprom);

	return 0;
}
Commit	Line	Data
d855497e MI	1	/*
d855497e MI	2	*
d855497e MI	3	*
	4	* Copyright (C) 2005 Mike Isely <isely@pobox.com>
	5	* Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
d855497e MI	16	*/
d855497e MI	17
5a0e3ad6	18	#include <linux/slab.h>
d855497e MI	19	#include "pvrusb2-eeprom.h"
	20	#include "pvrusb2-hdw-internal.h"
	21	#include "pvrusb2-debug.h"
	22
	23	#define trace_eeprom(...) pvr2_trace(PVR2_TRACE_EEPROM,__VA_ARGS__)
	24
	25
	26
	27	/*
	28
	29	Read and analyze data in the eeprom. Use tveeprom to figure out
	30	the packet structure, since this is another Hauppauge device and
25985edc	31	internally it has a family resemblance to ivtv-type devices
d855497e MI	32
	33	*/
	34
	35	#include <media/tveeprom.h>
	36
	37	/* We seem to only be interested in the last 128 bytes of the EEPROM */
	38	#define EEPROM_SIZE 128
	39
	40	/* Grab EEPROM contents, needed for direct method. */
	41	static u8 pvr2_eeprom_fetch(struct pvr2_hdw hdw)
	42	{
	43	struct i2c_msg msg[2];
	44	u8 *eeprom;
	45	u8 iadd[2];
	46	u8 addr;
	47	u16 eepromSize;
	48	unsigned int offs;
	49	int ret;
	50	int mode16 = 0;
	51	unsigned pcnt,tcnt;
	52	eeprom = kmalloc(EEPROM_SIZE,GFP_KERNEL);
	53	if (!eeprom) {
	54	pvr2_trace(PVR2_TRACE_ERROR_LEGS,
96292c89	55	"Failed to allocate memory required to read eeprom");
a0fd1cb1	56	return NULL;
d855497e MI	57	}
	58
	59	trace_eeprom("Value for eeprom addr from controller was 0x%x",
	60	hdw->eeprom_addr);
	61	addr = hdw->eeprom_addr;
	62	/* Seems that if the high bit is set, then the real eeprom
	63	address is shifted right now bit position (noticed this in
	64	newer PVR USB2 hardware) */
	65	if (addr & 0x80) addr >>= 1;
	66
	67	/* FX2 documentation states that a 16bit-addressed eeprom is
	68	expected if the I2C address is an odd number (yeah, this is
	69	strange but it's what they do) */
	70	mode16 = (addr & 1);
	71	eepromSize = (mode16 ? 4096 : 256);
96292c89 MCC	72	trace_eeprom("Examining %d byte eeprom at location 0x%x using %d bit addressing",
96292c89 MCC	73	eepromSize, addr,
d855497e MI	74	mode16 ? 16 : 8);
	75
	76	msg[0].addr = addr;
	77	msg[0].flags = 0;
	78	msg[0].len = mode16 ? 2 : 1;
	79	msg[0].buf = iadd;
	80	msg[1].addr = addr;
	81	msg[1].flags = I2C_M_RD;
	82
	83	/* We have to do the actual eeprom data fetch ourselves, because
	84	(1) we're only fetching part of the eeprom, and (2) if we were
	85	getting the whole thing our I2C driver can't grab it in one
	86	pass - which is what tveeprom is otherwise going to attempt */
	87	memset(eeprom,0,EEPROM_SIZE);
	88	for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) {
	89	pcnt = 16;
	90	if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt;
	91	offs = tcnt + (eepromSize - EEPROM_SIZE);
	92	if (mode16) {
	93	iadd[0] = offs >> 8;
	94	iadd[1] = offs;
	95	} else {
	96	iadd[0] = offs;
	97	}
	98	msg[1].len = pcnt;
	99	msg[1].buf = eeprom+tcnt;
27c7b710 MI	100	if ((ret = i2c_transfer(&hdw->i2c_adap,
27c7b710 MI	101	msg,ARRAY_SIZE(msg))) != 2) {
d855497e MI	102	pvr2_trace(PVR2_TRACE_ERROR_LEGS,
	103	"eeprom fetch set offs err=%d",ret);
	104	kfree(eeprom);
a0fd1cb1	105	return NULL;
d855497e MI	106	}
	107	}
	108	return eeprom;
	109	}
	110
	111
	112	/* Directly call eeprom analysis function within tveeprom. */
	113	int pvr2_eeprom_analyze(struct pvr2_hdw *hdw)
	114	{
	115	u8 *eeprom;
	116	struct tveeprom tvdata;
	117
	118	memset(&tvdata,0,sizeof(tvdata));
	119
	120	eeprom = pvr2_eeprom_fetch(hdw);
	121	if (!eeprom) return -EINVAL;
	122
	123	{
	124	struct i2c_client fake_client;
	125	/* Newer version expects a useless client interface */
	126	fake_client.addr = hdw->eeprom_addr;
	127	fake_client.adapter = &hdw->i2c_adap;
	128	tveeprom_hauppauge_analog(&fake_client,&tvdata,eeprom);
	129	}
	130
	131	trace_eeprom("eeprom assumed v4l tveeprom module");
	132	trace_eeprom("eeprom direct call results:");
	133	trace_eeprom("has_radio=%d",tvdata.has_radio);
	134	trace_eeprom("tuner_type=%d",tvdata.tuner_type);
	135	trace_eeprom("tuner_formats=0x%x",tvdata.tuner_formats);
	136	trace_eeprom("audio_processor=%d",tvdata.audio_processor);
	137	trace_eeprom("model=%d",tvdata.model);
	138	trace_eeprom("revision=%d",tvdata.revision);
	139	trace_eeprom("serial_number=%d",tvdata.serial_number);
	140	trace_eeprom("rev_str=%s",tvdata.rev_str);
	141	hdw->tuner_type = tvdata.tuner_type;
56dcbfa0	142	hdw->tuner_updated = !0;
d855497e MI	143	hdw->serial_number = tvdata.serial_number;
	144	hdw->std_mask_eeprom = tvdata.tuner_formats;
	145
	146	kfree(eeprom);
	147
	148	return 0;
	149	}