drivers/media/video/cx88/cx88-i2c.c

   1 /*
   2
   3     cx88-i2c.c  --  all the i2c code is here
   4
   5     Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
   6                            & Marcus Metzler (mocm@thp.uni-koeln.de)
   7     (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
   8     (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
   9
  10     (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
  11         - Multituner support and i2c address binding
  12
  13     This program is free software; you can redistribute it and/or modify
  14     it under the terms of the GNU General Public License as published by
  15     the Free Software Foundation; either version 2 of the License, or
  16     (at your option) any later version.
  17
  18     This program is distributed in the hope that it will be useful,
  19     but WITHOUT ANY WARRANTY; without even the implied warranty of
  20     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21     GNU General Public License for more details.
  22
  23     You should have received a copy of the GNU General Public License
  24     along with this program; if not, write to the Free Software
  25     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26
  27 */
  28
  29 #include <linux/module.h>
  30 #include <linux/moduleparam.h>
  31 #include <linux/init.h>
  32
  33 #include <asm/io.h>
  34
  35 #include "cx88.h"
  36 #include <media/v4l2-common.h>
  37
  38 static unsigned int i2c_debug = 0;
  39 module_param(i2c_debug, int, 0644);
  40 MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
  41
  42 static unsigned int i2c_scan = 0;
  43 module_param(i2c_scan, int, 0444);
  44 MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
  45
  46 #define dprintk(level,fmt, arg...)      if (i2c_debug >= level) \
  47         printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
  48
  49 /* ----------------------------------------------------------------------- */
  50
  51 static void cx8800_bit_setscl(void *data, int state)
  52 {
  53         struct cx88_core *core = data;
  54
  55         if (state)
  56                 core->i2c_state |= 0x02;
  57         else
  58                 core->i2c_state &= ~0x02;
  59         cx_write(MO_I2C, core->i2c_state);
  60         cx_read(MO_I2C);
  61 }
  62
  63 static void cx8800_bit_setsda(void *data, int state)
  64 {
  65         struct cx88_core *core = data;
  66
  67         if (state)
  68                 core->i2c_state |= 0x01;
  69         else
  70                 core->i2c_state &= ~0x01;
  71         cx_write(MO_I2C, core->i2c_state);
  72         cx_read(MO_I2C);
  73 }
  74
  75 static int cx8800_bit_getscl(void *data)
  76 {
  77         struct cx88_core *core = data;
  78         u32 state;
  79
  80         state = cx_read(MO_I2C);
  81         return state & 0x02 ? 1 : 0;
  82 }
  83
  84 static int cx8800_bit_getsda(void *data)
  85 {
  86         struct cx88_core *core = data;
  87         u32 state;
  88
  89         state = cx_read(MO_I2C);
  90         return state & 0x01;
  91 }
  92
  93 /* ----------------------------------------------------------------------- */
  94
  95 static int attach_inform(struct i2c_client *client)
  96 {
  97         struct tuner_setup tun_setup;
  98         struct cx88_core *core = i2c_get_adapdata(client->adapter);
  99
 100         dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
 101                 client->driver->driver.name, client->addr, client->name);
 102         if (!client->driver->command)
 103                 return 0;
 104
 105         if (core->radio_type != UNSET) {
 106                 if ((core->radio_addr==ADDR_UNSET)||(core->radio_addr==client->addr)) {
 107                         tun_setup.mode_mask = T_RADIO;
 108                         tun_setup.type = core->radio_type;
 109                         tun_setup.addr = core->radio_addr;
 110
 111                         client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
 112                 }
 113         }
 114         if (core->tuner_type != UNSET) {
 115                 if ((core->tuner_addr==ADDR_UNSET)||(core->tuner_addr==client->addr)) {
 116
 117                         tun_setup.mode_mask = T_ANALOG_TV;
 118                         tun_setup.type = core->tuner_type;
 119                         tun_setup.addr = core->tuner_addr;
 120
 121                         client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
 122                 }
 123         }
 124
 125         if (core->tda9887_conf)
 126                 client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
 127         return 0;
 128 }
 129
 130 static int detach_inform(struct i2c_client *client)
 131 {
 132         struct cx88_core *core = i2c_get_adapdata(client->adapter);
 133
 134         dprintk(1, "i2c detach [client=%s]\n", client->name);
 135         return 0;
 136 }
 137
 138 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
 139 {
 140         if (0 != core->i2c_rc)
 141                 return;
 142
 143         if (core->dvbdev) {
 144                 if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
 145                         core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
 146
 147                 i2c_clients_command(&core->i2c_adap, cmd, arg);
 148
 149                 if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
 150                         core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
 151         } else
 152                 i2c_clients_command(&core->i2c_adap, cmd, arg);
 153 }
 154
 155 static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
 156         .setsda  = cx8800_bit_setsda,
 157         .setscl  = cx8800_bit_setscl,
 158         .getsda  = cx8800_bit_getsda,
 159         .getscl  = cx8800_bit_getscl,
 160         .udelay  = 16,
 161         .mdelay  = 10,
 162         .timeout = 200,
 163 };
 164
 165 /* ----------------------------------------------------------------------- */
 166
 167 static struct i2c_adapter cx8800_i2c_adap_template = {
 168         .name              = "cx2388x",
 169         .owner             = THIS_MODULE,
 170         .id                = I2C_HW_B_CX2388x,
 171         .client_register   = attach_inform,
 172         .client_unregister = detach_inform,
 173 };
 174
 175 static struct i2c_client cx8800_i2c_client_template = {
 176         .name   = "cx88xx internal",
 177 };
 178
 179 static char *i2c_devs[128] = {
 180         [ 0x1c >> 1 ] = "lgdt330x",
 181         [ 0x86 >> 1 ] = "tda9887/cx22702",
 182         [ 0xa0 >> 1 ] = "eeprom",
 183         [ 0xc0 >> 1 ] = "tuner (analog)",
 184         [ 0xc2 >> 1 ] = "tuner (analog/dvb)",
 185 };
 186
 187 static void do_i2c_scan(char *name, struct i2c_client *c)
 188 {
 189         unsigned char buf;
 190         int i,rc;
 191
 192         for (i = 0; i < 128; i++) {
 193                 c->addr = i;
 194                 rc = i2c_master_recv(c,&buf,0);
 195                 if (rc < 0)
 196                         continue;
 197                 printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
 198                        name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
 199         }
 200 }
 201
 202 /* init + register i2c algo-bit adapter */
 203 int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
 204 {
 205         memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
 206                sizeof(core->i2c_adap));
 207         memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
 208                sizeof(core->i2c_algo));
 209         memcpy(&core->i2c_client, &cx8800_i2c_client_template,
 210                sizeof(core->i2c_client));
 211
 212         if (core->tuner_type != TUNER_ABSENT)
 213                 core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
 214         if (cx88_boards[core->board].dvb)
 215                 core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
 216
 217         core->i2c_adap.dev.parent = &pci->dev;
 218         strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
 219         core->i2c_algo.data = core;
 220         i2c_set_adapdata(&core->i2c_adap,core);
 221         core->i2c_adap.algo_data = &core->i2c_algo;
 222         core->i2c_client.adapter = &core->i2c_adap;
 223
 224         cx8800_bit_setscl(core,1);
 225         cx8800_bit_setsda(core,1);
 226
 227         core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
 228         if (0 == core->i2c_rc) {
 229                 dprintk(1, "i2c register ok\n");
 230                 if (i2c_scan)
 231                         do_i2c_scan(core->name,&core->i2c_client);
 232         } else
 233                 printk("%s: i2c register FAILED\n", core->name);
 234         return core->i2c_rc;
 235 }
 236
 237 /* ----------------------------------------------------------------------- */
 238
 239 EXPORT_SYMBOL(cx88_call_i2c_clients);
 240
 241 /*
 242  * Local variables:
 243  * c-basic-offset: 8
 244  * End:
 245  */