| /* |
| |
| 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/moduleparam.h> |
| #include <linux/init.h> |
| |
| #include <asm/io.h> |
| |
| #include "cx88.h" |
| #include <media/v4l2-common.h> |
| |
| static unsigned int i2c_debug = 0; |
| module_param(i2c_debug, int, 0644); |
| MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]"); |
| |
| static unsigned int i2c_scan = 0; |
| 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 int attach_inform(struct i2c_client *client) |
| { |
| struct tuner_setup tun_setup; |
| struct cx88_core *core = i2c_get_adapdata(client->adapter); |
| |
| dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n", |
| client->driver->driver.name, client->addr, client->name); |
| if (!client->driver->command) |
| return 0; |
| |
| if (core->radio_type != UNSET) { |
| if ((core->radio_addr==ADDR_UNSET)||(core->radio_addr==client->addr)) { |
| tun_setup.mode_mask = T_RADIO; |
| tun_setup.type = core->radio_type; |
| tun_setup.addr = core->radio_addr; |
| |
| client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup); |
| } |
| } |
| if (core->tuner_type != UNSET) { |
| if ((core->tuner_addr==ADDR_UNSET)||(core->tuner_addr==client->addr)) { |
| |
| tun_setup.mode_mask = T_ANALOG_TV; |
| tun_setup.type = core->tuner_type; |
| tun_setup.addr = core->tuner_addr; |
| |
| client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup); |
| } |
| } |
| |
| if (core->tda9887_conf) |
| client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf); |
| return 0; |
| } |
| |
| static int detach_inform(struct i2c_client *client) |
| { |
| struct cx88_core *core = i2c_get_adapdata(client->adapter); |
| |
| dprintk(1, "i2c detach [client=%s]\n", client->name); |
| return 0; |
| } |
| |
| void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg) |
| { |
| if (0 != core->i2c_rc) |
| return; |
| |
| if (core->dvbdev) { |
| if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl) |
| core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1); |
| |
| i2c_clients_command(&core->i2c_adap, cmd, arg); |
| |
| if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl) |
| core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0); |
| } else |
| i2c_clients_command(&core->i2c_adap, cmd, arg); |
| } |
| |
| static 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 struct i2c_adapter cx8800_i2c_adap_template = { |
| .name = "cx2388x", |
| .owner = THIS_MODULE, |
| .id = I2C_HW_B_CX2388x, |
| .client_register = attach_inform, |
| .client_unregister = detach_inform, |
| }; |
| |
| static struct i2c_client cx8800_i2c_client_template = { |
| .name = "cx88xx internal", |
| }; |
| |
| static char *i2c_devs[128] = { |
| [ 0x1c >> 1 ] = "lgdt330x", |
| [ 0x86 >> 1 ] = "tda9887/cx22702", |
| [ 0xa0 >> 1 ] = "eeprom", |
| [ 0xc0 >> 1 ] = "tuner (analog)", |
| [ 0xc2 >> 1 ] = "tuner (analog/dvb)", |
| }; |
| |
| static void do_i2c_scan(char *name, struct i2c_client *c) |
| { |
| unsigned char buf; |
| int i,rc; |
| |
| for (i = 0; i < 128; 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 algo-bit 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; |
| cx8800_i2c_algo_template.udelay=i2c_udelay; |
| |
| memcpy(&core->i2c_adap, &cx8800_i2c_adap_template, |
| sizeof(core->i2c_adap)); |
| memcpy(&core->i2c_algo, &cx8800_i2c_algo_template, |
| sizeof(core->i2c_algo)); |
| memcpy(&core->i2c_client, &cx8800_i2c_client_template, |
| sizeof(core->i2c_client)); |
| |
| if (core->tuner_type != TUNER_ABSENT) |
| core->i2c_adap.class |= I2C_CLASS_TV_ANALOG; |
| if (cx88_boards[core->board].mpeg & CX88_BOARD_DVB) |
| core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL; |
| |
| core->i2c_adap.dev.parent = &pci->dev; |
| strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name)); |
| core->i2c_algo.data = core; |
| i2c_set_adapdata(&core->i2c_adap,core); |
| core->i2c_adap.algo_data = &core->i2c_algo; |
| core->i2c_client.adapter = &core->i2c_adap; |
| |
| 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) { |
| dprintk(1, "i2c register ok\n"); |
| if (i2c_scan) |
| do_i2c_scan(core->name,&core->i2c_client); |
| } else |
| printk("%s: i2c register FAILED\n", core->name); |
| return core->i2c_rc; |
| } |
| |
| /* ----------------------------------------------------------------------- */ |
| |
| EXPORT_SYMBOL(cx88_call_i2c_clients); |
| |
| /* |
| * Local variables: |
| * c-basic-offset: 8 |
| * End: |
| */ |