/* cx88-i2c.c -- all the i2c code is here Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de) & Marcus Metzler (mocm@thp.uni-koeln.de) (c) 2002 Yurij Sysoev <yurij@naturesoft.net> (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org> (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org> - Multituner support and i2c address binding 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, or (at your option) any later version. 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/init.h> #include <asm/io.h> #include "cx88.h" #include <media/v4l2-common.h> static unsigned int i2c_debug; module_param(i2c_debug, int, 0644); MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]"); static unsigned int i2c_scan; module_param(i2c_scan, int, 0444); MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); static unsigned int i2c_udelay = 5; module_param(i2c_udelay, int, 0644); MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs " "(should be 5 or higher). Lower value means higher bus speed."); #define dprintk(level,fmt, arg...) if (i2c_debug >= level) \ printk(KERN_DEBUG "%s: " fmt, core->name , ## arg) /* ----------------------------------------------------------------------- */ static void cx8800_bit_setscl(void *data, int state) { struct cx88_core *core = data; if (state) core->i2c_state |= 0x02; else core->i2c_state &= ~0x02; cx_write(MO_I2C, core->i2c_state); cx_read(MO_I2C); } static void cx8800_bit_setsda(void *data, int state) { struct cx88_core *core = data; if (state) core->i2c_state |= 0x01; else core->i2c_state &= ~0x01; cx_write(MO_I2C, core->i2c_state); cx_read(MO_I2C); } static int cx8800_bit_getscl(void *data) { struct cx88_core *core = data; u32 state; state = cx_read(MO_I2C); return state & 0x02 ? 1 : 0; } static int cx8800_bit_getsda(void *data) { struct cx88_core *core = data; u32 state; state = cx_read(MO_I2C); return state & 0x01; } /* ----------------------------------------------------------------------- */ static const struct i2c_algo_bit_data cx8800_i2c_algo_template = { .setsda = cx8800_bit_setsda, .setscl = cx8800_bit_setscl, .getsda = cx8800_bit_getsda, .getscl = cx8800_bit_getscl, .udelay = 16, .timeout = 200, }; /* ----------------------------------------------------------------------- */ static const char * const i2c_devs[128] = { [ 0x1c >> 1 ] = "lgdt330x", [ 0x86 >> 1 ] = "tda9887/cx22702", [ 0xa0 >> 1 ] = "eeprom", [ 0xc0 >> 1 ] = "tuner (analog)", [ 0xc2 >> 1 ] = "tuner (analog/dvb)", [ 0xc8 >> 1 ] = "xc5000", }; static void do_i2c_scan(const char *name, struct i2c_client *c) { unsigned char buf; int i,rc; for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) { c->addr = i; rc = i2c_master_recv(c,&buf,0); if (rc < 0) continue; printk("%s: i2c scan: found device @ 0x%x [%s]\n", name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); } } /* init + register i2c adapter */ int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci) { /* Prevents usage of invalid delay values */ if (i2c_udelay<5) i2c_udelay=5; core->i2c_algo = cx8800_i2c_algo_template; core->i2c_adap.dev.parent = &pci->dev; strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name)); core->i2c_adap.owner = THIS_MODULE; core->i2c_algo.udelay = i2c_udelay; core->i2c_algo.data = core; i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev); core->i2c_adap.algo_data = &core->i2c_algo; core->i2c_client.adapter = &core->i2c_adap; strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE); cx8800_bit_setscl(core,1); cx8800_bit_setsda(core,1); core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap); if (0 == core->i2c_rc) { static u8 tuner_data[] = { 0x0b, 0xdc, 0x86, 0x52 }; static struct i2c_msg tuner_msg = { .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 }; dprintk(1, "i2c register ok\n"); switch( core->boardnr ) { case CX88_BOARD_HAUPPAUGE_HVR1300: case CX88_BOARD_HAUPPAUGE_HVR3000: case CX88_BOARD_HAUPPAUGE_HVR4000: printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n", core->name); i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1); break; default: break; } if (i2c_scan) do_i2c_scan(core->name,&core->i2c_client); } else printk("%s: i2c register FAILED\n", core->name); return core->i2c_rc; }