[GitHub/mt8127/android_kernel_alcatel_ttab.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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#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;

	tveeprom_hauppauge_analog(NULL, &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;
}

/*
  Stuff for Emacs to see, in order to encourage consistent editing style:
  *** Local Variables: ***
  *** mode: c ***
  *** fill-column: 70 ***
  *** tab-width: 8 ***
  *** c-basic-offset: 8 ***
  *** End: ***
  */
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	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
5a0e3ad6	22	#include <linux/slab.h>
d855497e MI	23	#include "pvrusb2-eeprom.h"
	24	#include "pvrusb2-hdw-internal.h"
	25	#include "pvrusb2-debug.h"
	26
	27	#define trace_eeprom(...) pvr2_trace(PVR2_TRACE_EEPROM,__VA_ARGS__)
	28
	29
	30
	31	/*
	32
	33	Read and analyze data in the eeprom. Use tveeprom to figure out
	34	the packet structure, since this is another Hauppauge device and
25985edc	35	internally it has a family resemblance to ivtv-type devices
d855497e MI	36
	37	*/
	38
	39	#include <media/tveeprom.h>
	40
	41	/* We seem to only be interested in the last 128 bytes of the EEPROM */
	42	#define EEPROM_SIZE 128
	43
	44	/* Grab EEPROM contents, needed for direct method. */
	45	static u8 pvr2_eeprom_fetch(struct pvr2_hdw hdw)
	46	{
	47	struct i2c_msg msg[2];
	48	u8 *eeprom;
	49	u8 iadd[2];
	50	u8 addr;
	51	u16 eepromSize;
	52	unsigned int offs;
	53	int ret;
	54	int mode16 = 0;
	55	unsigned pcnt,tcnt;
	56	eeprom = kmalloc(EEPROM_SIZE,GFP_KERNEL);
	57	if (!eeprom) {
	58	pvr2_trace(PVR2_TRACE_ERROR_LEGS,
	59	"Failed to allocate memory"
	60	" required to read eeprom");
a0fd1cb1	61	return NULL;
d855497e MI	62	}
	63
	64	trace_eeprom("Value for eeprom addr from controller was 0x%x",
	65	hdw->eeprom_addr);
	66	addr = hdw->eeprom_addr;
	67	/* Seems that if the high bit is set, then the real eeprom
	68	address is shifted right now bit position (noticed this in
	69	newer PVR USB2 hardware) */
	70	if (addr & 0x80) addr >>= 1;
	71
	72	/* FX2 documentation states that a 16bit-addressed eeprom is
	73	expected if the I2C address is an odd number (yeah, this is
	74	strange but it's what they do) */
	75	mode16 = (addr & 1);
	76	eepromSize = (mode16 ? 4096 : 256);
	77	trace_eeprom("Examining %d byte eeprom at location 0x%x"
	78	" using %d bit addressing",eepromSize,addr,
	79	mode16 ? 16 : 8);
	80
	81	msg[0].addr = addr;
	82	msg[0].flags = 0;
	83	msg[0].len = mode16 ? 2 : 1;
	84	msg[0].buf = iadd;
	85	msg[1].addr = addr;
	86	msg[1].flags = I2C_M_RD;
	87
	88	/* We have to do the actual eeprom data fetch ourselves, because
	89	(1) we're only fetching part of the eeprom, and (2) if we were
	90	getting the whole thing our I2C driver can't grab it in one
	91	pass - which is what tveeprom is otherwise going to attempt */
	92	memset(eeprom,0,EEPROM_SIZE);
	93	for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) {
	94	pcnt = 16;
	95	if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt;
	96	offs = tcnt + (eepromSize - EEPROM_SIZE);
	97	if (mode16) {
	98	iadd[0] = offs >> 8;
	99	iadd[1] = offs;
	100	} else {
	101	iadd[0] = offs;
	102	}
	103	msg[1].len = pcnt;
	104	msg[1].buf = eeprom+tcnt;
27c7b710 MI	105	if ((ret = i2c_transfer(&hdw->i2c_adap,
27c7b710 MI	106	msg,ARRAY_SIZE(msg))) != 2) {
d855497e MI	107	pvr2_trace(PVR2_TRACE_ERROR_LEGS,
	108	"eeprom fetch set offs err=%d",ret);
	109	kfree(eeprom);
a0fd1cb1	110	return NULL;
d855497e MI	111	}
	112	}
	113	return eeprom;
	114	}
	115
	116
	117	/* Directly call eeprom analysis function within tveeprom. */
	118	int pvr2_eeprom_analyze(struct pvr2_hdw *hdw)
	119	{
	120	u8 *eeprom;
	121	struct tveeprom tvdata;
	122
	123	memset(&tvdata,0,sizeof(tvdata));
	124
	125	eeprom = pvr2_eeprom_fetch(hdw);
655e5ff7 AB	126	if (!eeprom)
	127	return -EINVAL;
	128
	129	tveeprom_hauppauge_analog(NULL, &tvdata, eeprom);
d855497e MI	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	}
	150
	151	/*
	152	Stuff for Emacs to see, in order to encourage consistent editing style:
	153	* Local Variables: *
	154	* mode: c *
	155	* fill-column: 70 *
	156	* tab-width: 8 *
	157	* c-basic-offset: 8 *
	158	* End: *
	159	*/