rendered paste body/* em28xx-i2c.c - driver for Empia EM2800/EM2820/2840/2880 USB video capture devices Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> Markus Rechberger <mrechberger@gmail.com> Mauro Carvalho Chehab <mchehab@infradead.org> Sascha Sommer <saschasommer@freenet.de> 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/kernel.h>#include <linux/usb.h>#include <linux/i2c.h>#include <linux/video_decoder.h>#include <media/audiochip.h>#include <media/tveeprom.h>#include "em28xx.h"#include "xc3028-tuner.h"#include <media/v4l2-common.h>#include <media/tuner.h>#include "dvb_frontend.h"/* ----------------------------------------------------------- */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_debug = 1;module_param(i2c_debug, int, 0644);MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");#define dprintk1(lvl,fmt, args...) if (i2c_debug>=lvl) do {\ printk(fmt, ##args); } while (0)#define dprintk2(lvl,fmt, args...) if (i2c_debug>=lvl) do{ \ printk(KERN_DEBUG "%s at %s: " fmt, \ dev->name, __FUNCTION__ , ##args); } while (0)/* * em2800_i2c_send_max4() * send up to 4 bytes to the i2c device */static int em2800_i2c_send_max4(struct em28xx *dev, unsigned char addr, char *buf, int len){ int ret; int write_timeout; unsigned char b2[6]; BUG_ON(len < 1 || len > 4); b2[5] = 0x80 + len - 1; b2[4] = addr; b2[3] = buf[0]; if (len > 1) b2[2] = buf[1]; if (len > 2) b2[1] = buf[2]; if (len > 3) b2[0] = buf[3]; ret = dev->em28xx_write_regs(dev, 4 - len, &b2[4 - len], 2 + len); if (ret != 2 + len) { em28xx_warn("writing to i2c device failed (error=%i)\n", ret); return -EIO; } for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0; write_timeout -= 5) { ret = dev->em28xx_read_reg(dev, 0x05); if (ret == 0x80 + len - 1) return len; msleep(5); } em28xx_warn("i2c write timed out\n"); return -EIO;}/* * em2800_i2c_send_bytes() */static int em28xx_qt1010_reset_control(void *priv, int command, int mode){ struct em28xx *dev=(struct em28xx*)priv; switch(command){ case TUNER_RESET1: dev->em28xx_write_regs(dev, 0x04, "\x01", 1); break; case TUNER_RESET2: dev->em28xx_write_regs(dev, 0x04, "\x00", 1); break; } return 0;}/* this function is very ugly, most of it got reversed from logfiles */static int em28xx_reset_control(void *priv, int command, int mode){ struct em28xx *dev = (struct em28xx*)priv; int ret; char gpio[6]; if(command != EM28XX_SWITCH_MODE) /* enable the other IC on the bus */ dev->mode=mode;#if 0 printk("RESET CONTROL: %d, %d\n",command,mode);#endif switch(dev->model){ case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2: case EM2882_BOARD_PINNACLE_HYBRID_PRO: gpio[0]=0x2d; gpio[1]=0x3d; gpio[2]=0x2e; gpio[3]=0x3e; gpio[4]=0x08; gpio[5]=0x0c; break; case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900: case EM2882_BOARD_TERRATEC_HYBRID_XS: case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950: case EM2883_BOARD_KWORLD_HYBRID_A316: case EM2883_BOARD_PINNACLE_PCTV_HD_PRO: gpio[0]=0x2d; gpio[1]=0x3d; gpio[2]=0x2e; gpio[3]=0x3e; gpio[4]=0x00; gpio[5]=0x00; break; case EM2861_BOARD_PLEXTOR_PX_TV100U: case EM2880_BOARD_TERRATEC_HYBRID_XS: case EM2870_BOARD_TERRATEC_XS: case EM2861_BOARD_KWORLD_PVRTV_300U: case EM2880_BOARD_KWORLD_DVB_310U: case EM2880_BOARD_KWORLD_DVB_305U: case EM2870_BOARD_KWORLD_350U: case EM2870_BOARD_KWORLD_355U: gpio[0]=0x6d; gpio[1]=0x7d; gpio[2]=0x6e; gpio[3]=0x7e; gpio[4]=0x00; gpio[5]=0x00; break; case EM2880_BOARD_MSI_DIGIVOX_AD: case EM2880_BOARD_MSI_DIGIVOX_AD_II: gpio[0]=0x69; gpio[1]=0x79; gpio[2]=0x6a; gpio[3]=0x7a; gpio[4]=0x00; gpio[5]=0x00; break; case EM2881_BOARD_DNT_DA2_HYBRID: case EM2881_BOARD_PINNACLE_HYBRID_PRO: gpio[0]=0x6d; gpio[1]=0x7d; gpio[2]=0x6e; gpio[3]=0x7e; gpio[4]=0x08; gpio[5]=0x0c; break; case EM2880_BOARD_TERRATEC_HYBRID_XS_FR: gpio[0]=0x6d; gpio[1]=0x7d; gpio[2]=0x6e; gpio[3]=0x7e; gpio[4]=0x00; gpio[5]=0x00; break; default: return -EINVAL; } /* not sure about the delays here we have no specs about this */ switch(command) { case EM28XX_SWITCH_MODE: case TUNER_RESET1: switch(mode){ case V4L2_TUNER_ANALOG_TV: dev->em28xx_write_regs_req(dev,0x00,0x48,"\x00",1); dev->em28xx_write_regs_req(dev,0x00,0x12,"\x67",1); if(gpio[4]){ ret = dev->em28xx_write_regs(dev,0x04,&gpio[4],1); msleep(140); } break; case V4L2_INT_TUNER_DVBT_TV: case V4L2_INT_TUNER_DVBC_TV: case V4L2_INT_TUNER_ATSC_TV: dev->em28xx_write_regs_req(dev,0x00,0x48,"\x00",1); dev->em28xx_write_regs_req(dev,0x00,0x12,"\x37",1); if(gpio[5]){ ret = dev->em28xx_write_regs(dev,0x04,&gpio[5],1); msleep(140); } break; } case TUNER_RESET2: switch(mode){ case V4L2_TUNER_ANALOG_TV: msleep(6); ret = dev->em28xx_write_regs(dev, 0x08, &gpio[0], 1); msleep(10); ret = dev->em28xx_write_regs(dev, 0x08, &gpio[1], 1); msleep(5); break; case V4L2_INT_TUNER_DVBT_TV: case V4L2_INT_TUNER_DVBC_TV: case V4L2_INT_TUNER_ATSC_TV: msleep(6); ret = dev->em28xx_write_regs(dev, 0x08, &gpio[2], 1); msleep(6); ret = dev->em28xx_write_regs(dev, 0x08, &gpio[3], 1); msleep(6); /* thanks for no specs here grr! -- Markus */ if (command == TUNER_RESET1) switch (dev->model) { case EM2880_BOARD_TERRATEC_HYBRID_XS_FR: case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950: case EM2883_BOARD_KWORLD_HYBRID_A316: case EM2883_BOARD_PINNACLE_PCTV_HD_PRO: case EM2882_BOARD_TERRATEC_HYBRID_XS: ret = dev->em28xx_write_regs(dev,0x04,"\x04",1); msleep(10); ret = dev->em28xx_write_regs(dev,0x04,"\x0c",1); msleep(10); break; } break; default: printk("em28xx-i2c.c: tuner mode unsupported!\n"); return -EINVAL; } break; case TUNER_RESET3: switch(mode) { case V4L2_INT_TUNER_DVBT_TV: case V4L2_INT_TUNER_ATSC_TV: printk("Sending extra call for Digital TV!\n"); if(dev->dvb_dev && dev->dvb_dev->demod_init) dev->dvb_dev->demod_init(dev->dvb_dev->frontend); } break; } return 0;}static int em2800_i2c_send_bytes(void *data, unsigned char addr, char *buf, short len){ char *bufPtr = buf; int ret; int wrcount = 0; int count; int maxLen = 4; struct em28xx *dev = (struct em28xx *)data; while (len > 0) { count = (len > maxLen) ? maxLen : len; ret = em2800_i2c_send_max4(dev, addr, bufPtr, count); if (ret > 0) { len -= count; bufPtr += count; wrcount += count; } else return (ret < 0) ? ret : -EFAULT; } return wrcount;}/* * em2800_i2c_check_for_device() * check if there is a i2c_device at the supplied address */int em2800_i2c_check_for_device(struct em28xx *dev, unsigned char addr){ char msg; int ret; int write_timeout; msg = addr; ret = dev->em28xx_write_regs(dev, 0x04, &msg, 1); if (ret < 0) { em28xx_warn("setting i2c device address failed (error=%i)\n", ret); return ret; } msg = 0x84; ret = dev->em28xx_write_regs(dev, 0x05, &msg, 1); if (ret < 0) { em28xx_warn("preparing i2c read failed (error=%i)\n", ret); return ret; } for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0; write_timeout -= 5) { unsigned msg = dev->em28xx_read_reg(dev, 0x5); if (msg == 0x94) return -ENODEV; else if (msg == 0x84) return 0; msleep(5); } return -ENODEV;}/* * em2800_i2c_recv_bytes() * read from the i2c device */static int em2800_i2c_recv_bytes(struct em28xx *dev, unsigned char addr, char *buf, int len){ int ret; /* check for the device and set i2c read address */ ret = em2800_i2c_check_for_device(dev, addr); if (ret) { em28xx_warn ("preparing read at i2c address 0x%x failed (error=%i)\n", addr, ret); return ret; } ret = dev->em28xx_read_reg_req_len(dev, 0x0, 0x3, buf, len); if (ret < 0) { em28xx_warn("reading from i2c device at 0x%x failed (error=%i)", addr, ret); return ret; } return ret;}/* * em28xx_i2c_send_bytes() * untested for more than 4 bytes */static int em28xx_i2c_send_bytes(void *data, unsigned char addr, char *buf, short len, int stop){ int wrcount = 0; struct em28xx *dev = (struct em28xx *)data; int i; wrcount = dev->em28xx_write_regs_req(dev, stop ? 2 : 3, addr, buf, len); if(dev->em28xx_read_reg(dev, 0x5)!=0){ printk("FIXME:em28xx_i2c_send_bytes(%02x): write failed:\n", addr); printk("===============================\n"); for(i=0;i<len;i++){ printk("%02x ",(unsigned char)buf[i]); } printk("\n"); printk("================================\n"); } return wrcount;}/* * em28xx_i2c_recv_bytes() * read a byte from the i2c device */static int em28xx_i2c_recv_bytes(struct em28xx *dev, unsigned char addr, char *buf, int len){ int ret; ret = dev->em28xx_read_reg_req_len(dev, 2, addr, buf, len); if (ret < 0) { em28xx_warn("reading i2c device failed (error=%i)\n", ret); return ret; } if (dev->em28xx_read_reg(dev, 0x5) != 0) return -ENODEV; return ret;}/* * em28xx_i2c_check_for_device() * check if there is a i2c_device at the supplied address */static int em28xx_i2c_check_for_device(struct em28xx *dev, unsigned char addr){ char msg; int ret; msg = addr; ret = dev->em28xx_read_reg_req(dev, 2, addr); if (ret < 0) { em28xx_warn("reading from i2c device failed (error=%i)\n", ret); return ret; } if (dev->em28xx_read_reg(dev, 0x5) != 0) return -ENODEV; return 0;}/* * em28xx_i2c_xfer() * the main i2c transfer function */static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num){ struct em28xx *dev = i2c_adap->algo_data; int addr, rc, i, byte; if (num <= 0) return 0; for (i = 0; i < num; i++) { addr = msgs[i].addr << 1; dprintk2(2,"%s %s addr=%x len=%d:", (msgs[i].flags & I2C_M_RD) ? "read" : "write", i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len); if (!msgs[i].len) { /* no len: check only for device presence */ if (dev->em_type==EM2800) rc = em2800_i2c_check_for_device(dev, addr); else rc = em28xx_i2c_check_for_device(dev, addr); if (rc < 0) { dprintk2(2," no device\n"); return rc; } } else if (msgs[i].flags & I2C_M_RD) { /* read bytes */ if (dev->em_type==EM2800) rc = em2800_i2c_recv_bytes(dev, addr, msgs[i].buf, msgs[i].len); else rc = em28xx_i2c_recv_bytes(dev, addr, msgs[i].buf, msgs[i].len); if (i2c_debug>=2) { for (byte = 0; byte < msgs[i].len; byte++) { printk(" %02x", msgs[i].buf[byte]); } } } else { /* write bytes */ if (i2c_debug>=2) { for (byte = 0; byte < msgs[i].len; byte++) printk(" %02x", msgs[i].buf[byte]); } if (dev->em_type==EM2800) rc = em2800_i2c_send_bytes(dev, addr, msgs[i].buf, msgs[i].len); else rc = em28xx_i2c_send_bytes(dev, addr, msgs[i].buf, msgs[i].len, i == num - 1); } if (rc < 0) goto err; if (i2c_debug>=2) printk("\n"); } return num; err: dprintk2(2," ERROR: %i\n", rc); return rc;}static int em28xx_i2c_eeprom(struct em28xx *dev, struct i2c_client *client, unsigned char *eedata, int len){ unsigned char buf, *p = eedata; struct em28xx_eeprom *em_eeprom = (void *)eedata; int i, err, size = len, block; dev->i2c_client.addr = 0xa0 >> 1; /* Check if board has eeprom */ err = i2c_master_recv(client, &buf, 0); if (err < 0) return -1; buf = 0; if (1 != (err = i2c_master_send(client, &buf, 1))) { printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n", dev->name, err); return -1; } while (size > 0) { if (size > 16) block = 16; else block = size; if (block != (err = i2c_master_recv(client, p, block))) { printk(KERN_WARNING "%s: i2c eeprom read error (err=%d)\n", dev->name, err); return -1; } size -= block; p += block; } for (i = 0; i < len; i++) { if (0 == (i % 16)) printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i); printk(" %02x", eedata[i]); if (15 == (i % 16)) printk("\n"); } printk(KERN_INFO "EEPROM ID= 0x%08x\n", em_eeprom->id); printk(KERN_INFO "Vendor/Product ID= %04x:%04x\n", em_eeprom->vendor_ID, em_eeprom->product_ID); switch (em_eeprom->chip_conf >> 4 & 0x3) { case 0: printk(KERN_INFO "No audio on board.\n"); break; case 1: printk(KERN_INFO "AC97 audio (5 sample rates)\n"); break; case 2: printk(KERN_INFO "I2S audio, sample rate=32k\n"); break; case 3: printk(KERN_INFO "I2S audio, 3 sample rates\n"); break; } if (em_eeprom->chip_conf & 1 << 3) printk(KERN_INFO "USB Remote wakeup capable\n"); if (em_eeprom->chip_conf & 1 << 2) printk(KERN_INFO "USB Self power capable\n"); switch (em_eeprom->chip_conf & 0x3) { case 0: printk(KERN_INFO "500mA max power\n"); break; case 1: printk(KERN_INFO "400mA max power\n"); break; case 2: printk(KERN_INFO "300mA max power\n"); break; case 3: printk(KERN_INFO "200mA max power\n"); break; } printk(KERN_INFO "Table at 0x%02x, strings=0x%04x, 0x%04x, 0x%04x\n", em_eeprom->string_idx_table,em_eeprom->string1, em_eeprom->string2,em_eeprom->string3); return 0;}/* ----------------------------------------------------------- *//* * algo_control() */static int algo_control(struct i2c_adapter *adapter, unsigned int cmd, unsigned long arg){ return 0;}/* * functionality() */static u32 functionality(struct i2c_adapter *adap){ return I2C_FUNC_SMBUS_EMUL;}#ifndef I2C_PECstatic void inc_use(struct i2c_adapter *adap){ MOD_INC_USE_COUNT;}static void dec_use(struct i2c_adapter *adap){ MOD_DEC_USE_COUNT;}#endifstatic int em28xx_set_tuner(int check_eeprom, struct i2c_client *client){ struct em28xx *dev = client->adapter->algo_data; struct tuner_setup tun_setup; if (dev->has_tuner && dev->dev_modes != EM28XX_DVB) { /* do not set up a tuner if it's a dvb only device */#if 0 switch(dev->device_mode){ case 0: tun_setup.initmode=V4L2_TUNER_ANALOG_TV; break; case 1: tun_setup.initmode=V4L2_INT_TUNER_DVBT_TV; break; default: printk("wrong device_mode given, defaulting\n"); tun_setup.initmode=V4L2_TUNER_ANALOG_TV; }#endif tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; tun_setup.type = dev->tuner_type; tun_setup.addr = dev->tuner_addr; tun_setup.tuner_mode = &dev->mode; switch(dev->model){ case EM2870_BOARD_KWORLD_355U: case EM2870_BOARD_COMPRO_VIDEOMATE: /* TODO: evaluate how to move callback to device struct (think about the reset reset implementation process here */ tun_setup.tuner_callback = dev->em28xx_callback = em28xx_qt1010_reset_control; break; case EM2880_BOARD_TERRATEC_HYBRID_XS: case EM2880_BOARD_TERRATEC_HYBRID_XS_FR: case EM2882_BOARD_TERRATEC_HYBRID_XS: case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900: case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950: case EM2883_BOARD_KWORLD_HYBRID_A316: case EM2883_BOARD_PINNACLE_PCTV_HD_PRO: case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2: case EM2882_BOARD_PINNACLE_HYBRID_PRO: case EM2881_BOARD_DNT_DA2_HYBRID: case EM2881_BOARD_PINNACLE_HYBRID_PRO: case EM2880_BOARD_KWORLD_DVB_310U: case EM2880_BOARD_KWORLD_DVB_305U: case EM2870_BOARD_TERRATEC_XS: case EM2880_BOARD_MSI_DIGIVOX_AD: case EM2880_BOARD_MSI_DIGIVOX_AD_II: case EM2861_BOARD_KWORLD_PVRTV_300U: case EM2870_BOARD_KWORLD_350U: tun_setup.tuner_callback = dev->em28xx_callback = em28xx_reset_control; tun_setup.tuner_config = &dev->xc3028conf; break; default: tun_setup.tuner_callback = NULL; } em28xx_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup); } else { tun_setup.mode_mask = T_UNINITIALIZED; tun_setup.type = TUNER_ABSENT; tun_setup.addr = dev->tuner_addr; tun_setup.tuner_mode = NULL; em28xx_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup); } return 0;}/* * attach_inform() * gets called when a device attaches to the i2c bus * does some basic configuration */static int attach_inform(struct i2c_client *client){ struct em28xx *dev = client->adapter->algo_data; switch (client->addr << 1) { case 0x43: case 0x4b: { struct tuner_setup tun_setup; tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; tun_setup.type = TUNER_TDA9887; tun_setup.addr = client->addr; em28xx_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup); } break; case 0x86: em28xx_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf); break; case 0x42: dprintk1(1,"attach_inform: saa7114 detected.\n"); break; case 0x4a: dprintk1(1,"attach_inform: saa7113 detected.\n"); break; case 0xa0: dprintk1(1,"attach_inform: eeprom detected.\n"); em28xx_i2c_eeprom(dev, client, dev->eedata, sizeof(dev->eedata)); switch ( dev->model ) { case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2: case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2_R2: case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900: case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950: case EM2883_BOARD_KWORLD_HYBRID_A316: case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2: { struct tveeprom tv; tveeprom_hauppauge_analog(client, &tv, dev->eedata); if ( dev->tuner_type == TUNER_ABSENT ){ dev->tuner_type=tv.tuner_type; printk("setting new tuner type now %d!\n",tv.tuner_type); em28xx_set_tuner(-1, client); } if (tv.audio_processor == AUDIO_CHIP_MSP34XX) { dev->i2s_speed=2048000; dev->has_msp34xx=1; } else dev->has_msp34xx=0; if (dev->has_msp34xx) { /* Send a reset to other chips via gpio */ em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1); udelay(2500); em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1); udelay(2500); } } } break; case 0x60: case 0x8e: { struct IR_i2c *ir = i2c_get_clientdata(client); dprintk1(1,"attach_inform: IR detected (%s).\n",ir->phys); em28xx_set_ir(dev,ir); } break; case 0x80: case 0x88: dprintk1(1,"attach_inform: msp34xx detected.\n"); break; case 0xb8: case 0xba: dprintk1(1,"attach_inform: tvp5150 detected.\n"); break;#if 0 case 0xc2: dev->tuner_addr = client->addr; em28xx_set_tuner(-1,client); break;#endif case 0x1e: printk("zl10353 demodulator found!\n"); break; default: /* FIXME: this is something really stupid here! */ dprintk1(1,"attach inform (default): detected I2C address %x\n", client->addr << 1); dev->tuner_addr = client->addr; em28xx_set_tuner(-1, client); } return 0;}static struct i2c_algorithm em28xx_algo = { .master_xfer = em28xx_i2c_xfer, .algo_control = algo_control, .functionality = functionality,};static struct i2c_adapter em28xx_adap_template = {#ifdef I2C_PEC .owner = THIS_MODULE,#else .inc_use = inc_use, .dec_use = dec_use,#endif#ifdef I2C_CLASS_TV_ANALOG .class = I2C_CLASS_TV_ANALOG,#endif .name = "em28xx", .id = I2C_HW_B_EM28XX, .algo = &em28xx_algo, .client_register = attach_inform,};static struct i2c_client em28xx_client_template = { .name = "em28xx internal",#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,15) .flags = I2C_CLIENT_ALLOW_USE,#endif};/* ----------------------------------------------------------- *//* * i2c_devs * incomplete list of known devices */static char *i2c_devs[128] = { [0x4a >> 1] = "saa7113h", [0x60 >> 1] = "remote IR sensor", [0x8e >> 1] = "remote IR sensor", [0x86 >> 1] = "tda9887", [0x80 >> 1] = "msp34xx", [0x88 >> 1] = "msp34xx", [0xa0 >> 1] = "eeprom", [0xb8 >> 1] = "tvp5150a", [0xba >> 1] = "tvp5150a", [0xc0 >> 1] = "tuner (analog)", [0xc2 >> 1] = "tuner (analog)", [0xc4 >> 1] = "tuner (analog)", [0xc6 >> 1] = "tuner (analog)", [0x1e >> 1] = "zl10353/mt352 dvb-t demodulator",};/* * do_i2c_scan() * check i2c address range for devices */static void do_i2c_scan(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(KERN_INFO "%s: found i2c device @ 0x%x [%s]\n", name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); }}/* * em28xx_i2c_call_clients() * send commands to all attached i2c devices */void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg){ BUG_ON(NULL == dev->i2c_adap.algo_data); i2c_clients_command(&dev->i2c_adap, cmd, arg);}/* * em28xx_i2c_register() * register i2c bus */int em28xx_i2c_register(struct em28xx *dev){ BUG_ON(!dev->em28xx_write_regs || !dev->em28xx_read_reg); BUG_ON(!dev->em28xx_write_regs_req || !dev->em28xx_read_reg_req); dev->i2c_adap = em28xx_adap_template; dev->i2c_adap.dev.parent = &dev->udev->dev; strcpy(dev->i2c_adap.name, dev->name); dev->i2c_adap.algo_data = dev; i2c_add_adapter(&dev->i2c_adap); dev->i2c_client = em28xx_client_template; dev->i2c_client.adapter = &dev->i2c_adap; if (i2c_scan || dev->dev_modes == 0) do_i2c_scan(dev->name, &dev->i2c_client); return 0;}/* * em28xx_i2c_unregister() * unregister i2c_bus */int em28xx_i2c_unregister(struct em28xx *dev){ i2c_del_adapter(&dev->i2c_adap); return 0;}EXPORT_SYMBOL(em28xx_i2c_call_clients);