mirror of https://gitee.com/openkylin/linux.git
253 lines
7.0 KiB
C
253 lines
7.0 KiB
C
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/*
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cx88-i2c.c -- all the i2c code is here
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Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
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& Marcus Metzler (mocm@thp.uni-koeln.de)
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(c) 2002 Yurij Sysoev <yurij@naturesoft.net>
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(c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
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(c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
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- Multituner support and i2c address binding
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include "cx88.h"
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#include <media/v4l2-common.h>
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static unsigned int i2c_debug;
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module_param(i2c_debug, int, 0644);
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MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
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static unsigned int i2c_scan;
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module_param(i2c_scan, int, 0444);
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MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
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static unsigned int i2c_udelay = 5;
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module_param(i2c_udelay, int, 0644);
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MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs "
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"(should be 5 or higher). Lower value means higher bus speed.");
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#define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
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printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
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/* ----------------------------------------------------------------------- */
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static void cx8800_bit_setscl(void *data, int state)
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{
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struct cx88_core *core = data;
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if (state)
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core->i2c_state |= 0x02;
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else
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core->i2c_state &= ~0x02;
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cx_write(MO_I2C, core->i2c_state);
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cx_read(MO_I2C);
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}
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static void cx8800_bit_setsda(void *data, int state)
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{
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struct cx88_core *core = data;
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if (state)
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core->i2c_state |= 0x01;
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else
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core->i2c_state &= ~0x01;
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cx_write(MO_I2C, core->i2c_state);
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cx_read(MO_I2C);
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}
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static int cx8800_bit_getscl(void *data)
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{
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struct cx88_core *core = data;
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u32 state;
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state = cx_read(MO_I2C);
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return state & 0x02 ? 1 : 0;
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}
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static int cx8800_bit_getsda(void *data)
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{
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struct cx88_core *core = data;
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u32 state;
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state = cx_read(MO_I2C);
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return state & 0x01;
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}
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/* ----------------------------------------------------------------------- */
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static int attach_inform(struct i2c_client *client)
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{
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struct tuner_setup tun_setup;
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struct cx88_core *core = i2c_get_adapdata(client->adapter);
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dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
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client->driver->driver.name, client->addr, client->name);
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if (!client->driver->command)
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return 0;
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if (core->board.radio_type != UNSET) {
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if ((core->board.radio_addr==ADDR_UNSET)||(core->board.radio_addr==client->addr)) {
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tun_setup.mode_mask = T_RADIO;
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tun_setup.type = core->board.radio_type;
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tun_setup.addr = core->board.radio_addr;
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tun_setup.tuner_callback = cx88_tuner_callback;
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client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
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}
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}
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if (core->board.tuner_type != UNSET) {
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if ((core->board.tuner_addr==ADDR_UNSET)||(core->board.tuner_addr==client->addr)) {
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tun_setup.mode_mask = T_ANALOG_TV;
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tun_setup.type = core->board.tuner_type;
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tun_setup.addr = core->board.tuner_addr;
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tun_setup.tuner_callback = cx88_tuner_callback;
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client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
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}
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}
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if (core->board.tda9887_conf) {
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struct v4l2_priv_tun_config tda9887_cfg;
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tda9887_cfg.tuner = TUNER_TDA9887;
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tda9887_cfg.priv = &core->board.tda9887_conf;
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client->driver->command(client, TUNER_SET_CONFIG, &tda9887_cfg);
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}
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return 0;
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}
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static int detach_inform(struct i2c_client *client)
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{
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struct cx88_core *core = i2c_get_adapdata(client->adapter);
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dprintk(1, "i2c detach [client=%s]\n", client->name);
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return 0;
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}
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void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
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{
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if (0 != core->i2c_rc)
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return;
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#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
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if ( (core->dvbdev) && (core->dvbdev->dvb.frontend) ) {
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if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
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core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
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i2c_clients_command(&core->i2c_adap, cmd, arg);
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if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
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core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
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} else
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#endif
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i2c_clients_command(&core->i2c_adap, cmd, arg);
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}
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static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
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.setsda = cx8800_bit_setsda,
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.setscl = cx8800_bit_setscl,
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.getsda = cx8800_bit_getsda,
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.getscl = cx8800_bit_getscl,
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.udelay = 16,
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.timeout = 200,
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};
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/* ----------------------------------------------------------------------- */
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static char *i2c_devs[128] = {
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[ 0x1c >> 1 ] = "lgdt330x",
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[ 0x86 >> 1 ] = "tda9887/cx22702",
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[ 0xa0 >> 1 ] = "eeprom",
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[ 0xc0 >> 1 ] = "tuner (analog)",
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[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
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[ 0xc8 >> 1 ] = "xc5000",
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};
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static void do_i2c_scan(char *name, struct i2c_client *c)
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{
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unsigned char buf;
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int i,rc;
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for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
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c->addr = i;
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rc = i2c_master_recv(c,&buf,0);
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if (rc < 0)
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continue;
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printk("%s: i2c scan: found device @ 0x%x [%s]\n",
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name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
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}
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}
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/* init + register i2c algo-bit adapter */
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int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
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{
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/* Prevents usage of invalid delay values */
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if (i2c_udelay<5)
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i2c_udelay=5;
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memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
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sizeof(core->i2c_algo));
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if (core->board.tuner_type != TUNER_ABSENT)
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core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
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if (core->board.mpeg & CX88_MPEG_DVB)
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core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
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core->i2c_adap.dev.parent = &pci->dev;
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strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
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core->i2c_adap.owner = THIS_MODULE;
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core->i2c_adap.id = I2C_HW_B_CX2388x;
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core->i2c_adap.client_register = attach_inform;
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core->i2c_adap.client_unregister = detach_inform;
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core->i2c_algo.udelay = i2c_udelay;
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core->i2c_algo.data = core;
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i2c_set_adapdata(&core->i2c_adap,core);
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core->i2c_adap.algo_data = &core->i2c_algo;
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core->i2c_client.adapter = &core->i2c_adap;
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strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
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cx8800_bit_setscl(core,1);
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cx8800_bit_setsda(core,1);
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core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
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if (0 == core->i2c_rc) {
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dprintk(1, "i2c register ok\n");
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if (i2c_scan)
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do_i2c_scan(core->name,&core->i2c_client);
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} else
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printk("%s: i2c register FAILED\n", core->name);
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return core->i2c_rc;
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}
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/* ----------------------------------------------------------------------- */
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EXPORT_SYMBOL(cx88_call_i2c_clients);
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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