WebSVN - shark - Blame - Rev 170 - /shark/trunk/drivers/bttv/bttv-if.c

Rev	Author	Line No.	Line
170	giacomo	1	/*
		2	bttv-if.c -- interfaces to other kernel modules
		3	all the i2c code is here
		4	also the gpio interface exported by bttv (used by lirc)
		5
		6	bttv - Bt848 frame grabber driver
		7
		8	Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
		9	& Marcus Metzler (mocm@thp.uni-koeln.de)
		10	(c) 1999,2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
		11
		12	This program is free software; you can redistribute it and/or modify
		13	it under the terms of the GNU General Public License as published by
		14	the Free Software Foundation; either version 2 of the License, or
		15	(at your option) any later version.
		16
		17	This program is distributed in the hope that it will be useful,
		18	but WITHOUT ANY WARRANTY; without even the implied warranty of
		19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		20	GNU General Public License for more details.
		21
		22	You should have received a copy of the GNU General Public License
		23	along with this program; if not, write to the Free Software
		24	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		25
		26	*/
		27
		28	/* SHARK version by Giacomo Guidi <giacomo@gandalf.sssup.it> */
		29
		30	#define __NO_VERSION__ 1
		31
		32	#include <linux/pci.h>
		33	#include <string.h>
		34	#include <asm/io.h>
		35
		36	#include "drivers/bttv.h"
		37	#include "drivers/tuner.h"
		38
		39	#define printk cprintf
		40
		41	static struct i2c_algo_bit_data bttv_i2c_algo_template;
		42	static struct i2c_adapter bttv_i2c_adap_template;
		43	static struct i2c_client bttv_i2c_client_template;
		44
		45	/* ----------------------------------------------------------------------- */
		46	/* Exported functions - for other modules which want to access the */
		47	/* gpio ports (IR for example) */
		48	/* see bttv.h for comments */
		49
		50	int bttv_get_cardinfo(unsigned int card, int type, int cardid)
		51	{
		52	if (card >= bttv_num) {
		53	return -1;
		54	}
		55	*type = bttvs[card].type;
		56	*cardid = bttvs[card].cardid;
		57	return 0;
		58	}
		59
		60	int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
		61	{
		62	struct bttv *btv;
		63
		64	if (card >= bttv_num) {
		65	return -EINVAL;
		66	}
		67
		68	btv = &bttvs[card];
		69	btaor(data, ~mask, BT848_GPIO_OUT_EN);
		70	if (bttv_gpio)
		71	bttv_gpio_tracking(btv,"extern enable");
		72	return 0;
		73	}
		74
		75	int bttv_read_gpio(unsigned int card, unsigned long *data)
		76	{
		77	struct bttv *btv;
		78
		79	if (card >= bttv_num) {
		80	return -EINVAL;
		81	}
		82
		83	btv = &bttvs[card];
		84
		85	if(btv->shutdown) {
		86	return -ENODEV;
		87	}
		88
		89	/* prior setting BT848_GPIO_REG_INP is (probably) not needed
		90	because we set direct input on init */
		91	*data = gpioread();
		92	return 0;
		93	}
		94
		95	int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
		96	{
		97	struct bttv *btv;
		98
		99	if (card >= bttv_num) {
		100	return -EINVAL;
		101	}
		102
		103	btv = &bttvs[card];
		104
		105	/* prior setting BT848_GPIO_REG_INP is (probably) not needed
		106	because direct input is set on init */
		107	gpioaor(data & mask, ~mask);
		108	if (bttv_gpio)
		109	bttv_gpio_tracking(btv,"extern write");
		110	return 0;
		111	}
		112
		113	/* ----------------------------------------------------------------------- */
		114	/* I2C functions */
		115
		116	void bttv_bit_setscl(void *data, int state)
		117	{
		118	struct bttv btv = (struct bttv)data;
		119	unsigned long tmp;
		120
		121	if (state)
		122	btv->i2c_state \|= 0x02;
		123	else
		124	btv->i2c_state &= ~0x02;
		125	btwrite(btv->i2c_state, BT848_I2C);
		126	tmp = btread(BT848_I2C);
		127	}
		128
		129	void bttv_bit_setsda(void *data, int state)
		130	{
		131	struct bttv btv = (struct bttv)data;
		132	unsigned long tmp;
		133
		134	if (state)
		135	btv->i2c_state \|= 0x01;
		136	else
		137	btv->i2c_state &= ~0x01;
		138	btwrite(btv->i2c_state, BT848_I2C);
		139	tmp = btread(BT848_I2C);
		140	}
		141
		142	static int bttv_bit_getscl(void *data)
		143	{
		144	struct bttv btv = (struct bttv)data;
		145	int state;
		146
		147	state = btread(BT848_I2C) & 0x02 ? 1 : 0;
		148	return state;
		149	}
		150
		151	static int bttv_bit_getsda(void *data)
		152	{
		153	struct bttv btv = (struct bttv)data;
		154	int state;
		155
		156	state = btread(BT848_I2C) & 0x01;
		157	return state;
		158	}
		159
		160	static void bttv_inc_use(struct i2c_adapter *adap)
		161	{
		162	MOD_INC_USE_COUNT;
		163	}
		164
		165	static void bttv_dec_use(struct i2c_adapter *adap)
		166	{
		167	MOD_DEC_USE_COUNT;
		168	}
		169
		170	static int attach_inform(struct i2c_client *client)
		171	{
		172	struct bttv btv = (struct bttv)client->adapter->data;
		173	int i;
		174
		175	for (i = 0; i < I2C_CLIENTS_MAX; i++) {
		176	if (btv->i2c_clients[i] == NULL) {
		177	btv->i2c_clients[i] = client;
		178	break;
		179	}
		180	}
		181	if (btv->tuner_type != -1)
		182	bttv_call_i2c_clients(btv,TUNER_SET_TYPE,&btv->tuner_type);
		183	if (bttv_verbose)
		184	cprintf("bttv%d: i2c attach [client=%s,%s]\n",btv->nr,
		185	client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
		186	return 0;
		187	}
		188
		189	static int detach_inform(struct i2c_client *client)
		190	{
		191	struct bttv btv = (struct bttv)client->adapter->data;
		192	int i;
		193
		194	for (i = 0; i < I2C_CLIENTS_MAX; i++) {
		195	if (btv->i2c_clients[i] == client) {
		196	btv->i2c_clients[i] = NULL;
		197	break;
		198	}
		199	}
		200	if (bttv_verbose)
		201	cprintf("bttv%d: i2c detach [client=%s,%s]\n",btv->nr,
		202	client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed");
		203	return 0;
		204	}
		205
		206	void bttv_call_i2c_clients(struct bttv btv, unsigned int cmd, void arg)
		207	{
		208	int i;
		209
		210	for (i = 0; i < I2C_CLIENTS_MAX; i++) {
		211	if (NULL == btv->i2c_clients[i])
		212	continue;
		213	if (NULL == btv->i2c_clients[i]->driver->command)
		214	continue;
		215	btv->i2c_clients[i]->driver->command(
		216	btv->i2c_clients[i],cmd,arg);
		217	}
		218	}
		219
		220	static struct i2c_algo_bit_data bttv_i2c_algo_template = {
		221	setsda: bttv_bit_setsda,
		222	setscl: bttv_bit_setscl,
		223	getsda: bttv_bit_getsda,
		224	getscl: bttv_bit_getscl,
		225	udelay: 16,
		226	mdelay: 10,
		227	timeout: 200,
		228	};
		229
		230	static struct i2c_adapter bttv_i2c_adap_template = {
		231	name: "bt848",
		232	id: I2C_HW_B_BT848,
		233	inc_use: bttv_inc_use,
		234	dec_use: bttv_dec_use,
		235	client_register: attach_inform,
		236	client_unregister: detach_inform,
		237	};
		238
		239	static struct i2c_client bttv_i2c_client_template = {
		240	name: "bttv internal use only",
		241	id: -1,
		242	};
		243
		244
		245	/* read I2C */
		246	int bttv_I2CRead(struct bttv btv, unsigned char addr, char probe_for)
		247	{
		248	unsigned char buffer = 0;
		249
		250	if (0 != btv->i2c_rc)
		251	return -1;
		252	if (bttv_verbose && NULL != probe_for)
		253	printk("[info ] bttv%d: i2c: checking for %s @ 0x%02x... ",
		254	btv->nr,probe_for,addr);
		255	btv->i2c_client.addr = addr >> 1;
		256	if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) {
		257	if (NULL != probe_for) {
		258	if (bttv_verbose)
		259	printk("not found\n");
		260	} else
		261	printk("bttv%d: i2c read 0x%x: error\n",
		262	btv->nr,addr);
		263	return -1;
		264	}
		265	if (bttv_verbose && NULL != probe_for)
		266	printk("found\n");
		267	return buffer;
		268	}
		269
		270	/* write I2C */
		271	int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1,
		272	unsigned char b2, int both)
		273	{
		274	unsigned char buffer[2];
		275	int bytes = both ? 2 : 1;
		276
		277	if (0 != btv->i2c_rc)
		278	return -1;
		279	btv->i2c_client.addr = addr >> 1;
		280	buffer[0] = b1;
		281	buffer[1] = b2;
		282	if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes))
		283	return -1;
		284	return 0;
		285	}
		286
		287	/* read EEPROM content */
		288	void bttv_readee(struct bttv btv, unsigned char eedata, int addr)
		289	{
		290	int i;
		291
		292	if (bttv_I2CWrite(btv, addr, 0, -1, 0)<0) {
		293	printk("bttv: readee error\n");
		294	return;
		295	}
		296	btv->i2c_client.addr = addr >> 1;
		297	for (i=0; i<256; i+=16) {
		298	if (16 != i2c_master_recv(&btv->i2c_client,eedata+i,16)) {
		299	printk("bttv: readee error\n");
		300	break;
		301	}
		302	}
		303	}
		304
		305	/* TODO: get an assigned bus id */
		306	#define I2C_HW_B_BT848_OSPREY 0x0FF
		307
		308	/* init + register i2c algo-bit adapter */
		309	int init_bttv_i2c(struct bttv *btv)
		310	{
		311	memcpy(&btv->i2c_adap, &bttv_i2c_adap_template,
		312	sizeof(struct i2c_adapter));
		313
		314	if ((btv->type == BTTV_OSPREY2000) \|\|
		315	(btv->type == BTTV_OSPREY5x0)) {
		316	/* these boards have the bt860 which conflicts with the tda7432
		317	* which will attempt to load when this type of bus is registered.
		318	* change the bus name to prevent this (and any other conflicts)
		319	* from occuring */
		320	btv->i2c_adap.id = I2C_HW_B_BT848_OSPREY;
		321	}
		322
		323	memcpy(&btv->i2c_algo, &bttv_i2c_algo_template,
		324	sizeof(struct i2c_algo_bit_data));
		325	memcpy(&btv->i2c_client, &bttv_i2c_client_template,
		326	sizeof(struct i2c_client));
		327
		328	sprintf(btv->i2c_adap.name+strlen(btv->i2c_adap.name),
		329	" #%d", btv->nr);
		330	btv->i2c_algo.data = btv;
		331	btv->i2c_adap.data = btv;
		332	btv->i2c_adap.algo_data = &btv->i2c_algo;
		333	btv->i2c_client.adapter = &btv->i2c_adap;
		334
		335	bttv_bit_setscl(btv,1);
		336	bttv_bit_setsda(btv,1);
		337
		338	printk("[info ] bttv: adding i2c bus to system\n");
		339	btv->i2c_rc = i2c_bit_add_bus(&btv->i2c_adap);
		340	printk("[info ] bttv: i2c bus added to system\n");
		341	return btv->i2c_rc;
		342	}
		343
		344	/* find a bttv struct by matching some data from the pci bus (for audio) */
		345	struct bttv bttv_find_matching_card( struct pci_dev dev )
		346	{
		347	int i;
		348
		349	if (dev == NULL) return NULL;
		350	for (i = 0;i < bttv_num;i++) {
		351	if (bttvs[i].dev == NULL) {
		352	continue; //hmm...can this ever happen?
		353	}
		354	if ((dev->bus->number == bttvs[i].dev->bus->number) &&
		355	(PCI_SLOT(dev->devfn) == PCI_SLOT(bttvs[i].dev->devfn))) {
		356	//match! return this one.
		357	return &(bttvs[i]);
		358	}
		359	}
		360	return NULL;
		361	}
		362
		363	struct gpio_adapter bttv_get_gpio( struct bttv btv )
		364	{
		365	return &(btv->gpio_adap);
		366	}
		367
		368	/*
		369	* Local variables:
		370	* c-basic-offset: 8
		371	* End:
		372	*/

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(root)/shark/trunk/drivers/bttv/bttv-if.c - Rev 170