Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 1 | /* |
| 2 | I2C functions |
| 3 | Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
| 4 | Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | This file includes an i2c implementation that was reverse engineered |
| 23 | from the Hauppauge windows driver. Older ivtv versions used i2c-algo-bit, |
| 24 | which whilst fine under most circumstances, had trouble with the Zilog |
| 25 | CPU on the PVR-150 which handles IR functions (occasional inability to |
| 26 | communicate with the chip until it was reset) and also with the i2c |
| 27 | bus being completely unreachable when multiple PVR cards were present. |
| 28 | |
| 29 | The implementation is very similar to i2c-algo-bit, but there are enough |
| 30 | subtle differences that the two are hard to merge. The general strategy |
| 31 | employed by i2c-algo-bit is to use udelay() to implement the timing |
| 32 | when putting out bits on the scl/sda lines. The general strategy taken |
| 33 | here is to poll the lines for state changes (see ivtv_waitscl and |
| 34 | ivtv_waitsda). In addition there are small delays at various locations |
| 35 | which poll the SCL line 5 times (ivtv_scldelay). I would guess that |
| 36 | since this is memory mapped I/O that the length of those delays is tied |
| 37 | to the PCI bus clock. There is some extra code to do with recovery |
| 38 | and retries. Since it is not known what causes the actual i2c problems |
| 39 | in the first place, the only goal if one was to attempt to use |
| 40 | i2c-algo-bit would be to try to make it follow the same code path. |
| 41 | This would be a lot of work, and I'm also not convinced that it would |
| 42 | provide a generic benefit to i2c-algo-bit. Therefore consider this |
| 43 | an engineering solution -- not pretty, but it works. |
| 44 | |
| 45 | Some more general comments about what we are doing: |
| 46 | |
| 47 | The i2c bus is a 2 wire serial bus, with clock (SCL) and data (SDA) |
| 48 | lines. To communicate on the bus (as a master, we don't act as a slave), |
| 49 | we first initiate a start condition (ivtv_start). We then write the |
| 50 | address of the device that we want to communicate with, along with a flag |
| 51 | that indicates whether this is a read or a write. The slave then issues |
| 52 | an ACK signal (ivtv_ack), which tells us that it is ready for reading / |
| 53 | writing. We then proceed with reading or writing (ivtv_read/ivtv_write), |
| 54 | and finally issue a stop condition (ivtv_stop) to make the bus available |
| 55 | to other masters. |
| 56 | |
| 57 | There is an additional form of transaction where a write may be |
| 58 | immediately followed by a read. In this case, there is no intervening |
| 59 | stop condition. (Only the msp3400 chip uses this method of data transfer). |
| 60 | */ |
| 61 | |
| 62 | #include "ivtv-driver.h" |
| 63 | #include "ivtv-cards.h" |
| 64 | #include "ivtv-gpio.h" |
Hans Verkuil | 83df8e7 | 2007-03-10 06:54:58 -0300 | [diff] [blame] | 65 | #include "ivtv-i2c.h" |
Hans Verkuil | 72c851b | 2010-08-06 10:53:19 -0300 | [diff] [blame] | 66 | #include <media/cx25840.h> |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 67 | |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 68 | /* i2c implementation for cx23415/6 chip, ivtv project. |
| 69 | * Author: Kevin Thayer (nufan_wfk at yahoo.com) |
| 70 | */ |
| 71 | /* i2c stuff */ |
| 72 | #define IVTV_REG_I2C_SETSCL_OFFSET 0x7000 |
| 73 | #define IVTV_REG_I2C_SETSDA_OFFSET 0x7004 |
| 74 | #define IVTV_REG_I2C_GETSCL_OFFSET 0x7008 |
| 75 | #define IVTV_REG_I2C_GETSDA_OFFSET 0x700c |
| 76 | |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 77 | #define IVTV_CS53L32A_I2C_ADDR 0x11 |
Hans Verkuil | e2a1774 | 2007-10-30 05:50:03 -0300 | [diff] [blame] | 78 | #define IVTV_M52790_I2C_ADDR 0x48 |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 79 | #define IVTV_CX25840_I2C_ADDR 0x44 |
| 80 | #define IVTV_SAA7115_I2C_ADDR 0x21 |
| 81 | #define IVTV_SAA7127_I2C_ADDR 0x44 |
| 82 | #define IVTV_SAA717x_I2C_ADDR 0x21 |
| 83 | #define IVTV_MSP3400_I2C_ADDR 0x40 |
| 84 | #define IVTV_HAUPPAUGE_I2C_ADDR 0x50 |
| 85 | #define IVTV_WM8739_I2C_ADDR 0x1a |
| 86 | #define IVTV_WM8775_I2C_ADDR 0x1b |
| 87 | #define IVTV_TEA5767_I2C_ADDR 0x60 |
| 88 | #define IVTV_UPD64031A_I2C_ADDR 0x12 |
| 89 | #define IVTV_UPD64083_I2C_ADDR 0x5c |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 90 | #define IVTV_VP27SMPX_I2C_ADDR 0x5b |
| 91 | #define IVTV_M52790_I2C_ADDR 0x48 |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 92 | #define IVTV_AVERMEDIA_IR_RX_I2C_ADDR 0x40 |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 93 | #define IVTV_HAUP_EXT_IR_RX_I2C_ADDR 0x1a |
| 94 | #define IVTV_HAUP_INT_IR_RX_I2C_ADDR 0x18 |
| 95 | #define IVTV_Z8F0811_IR_TX_I2C_ADDR 0x70 |
| 96 | #define IVTV_Z8F0811_IR_RX_I2C_ADDR 0x71 |
Mauro Carvalho Chehab | e1e2c57 | 2010-12-30 08:31:10 -0300 | [diff] [blame] | 97 | #define IVTV_ADAPTEC_IR_ADDR 0x6b |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 98 | |
| 99 | /* This array should match the IVTV_HW_ defines */ |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 100 | static const u8 hw_addrs[] = { |
| 101 | IVTV_CX25840_I2C_ADDR, |
| 102 | IVTV_SAA7115_I2C_ADDR, |
| 103 | IVTV_SAA7127_I2C_ADDR, |
| 104 | IVTV_MSP3400_I2C_ADDR, |
| 105 | 0, |
| 106 | IVTV_WM8775_I2C_ADDR, |
| 107 | IVTV_CS53L32A_I2C_ADDR, |
| 108 | 0, |
| 109 | IVTV_SAA7115_I2C_ADDR, |
| 110 | IVTV_UPD64031A_I2C_ADDR, |
| 111 | IVTV_UPD64083_I2C_ADDR, |
| 112 | IVTV_SAA717x_I2C_ADDR, |
| 113 | IVTV_WM8739_I2C_ADDR, |
| 114 | IVTV_VP27SMPX_I2C_ADDR, |
| 115 | IVTV_M52790_I2C_ADDR, |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 116 | 0, /* IVTV_HW_GPIO dummy driver ID */ |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 117 | IVTV_AVERMEDIA_IR_RX_I2C_ADDR, /* IVTV_HW_I2C_IR_RX_AVER */ |
| 118 | IVTV_HAUP_EXT_IR_RX_I2C_ADDR, /* IVTV_HW_I2C_IR_RX_HAUP_EXT */ |
| 119 | IVTV_HAUP_INT_IR_RX_I2C_ADDR, /* IVTV_HW_I2C_IR_RX_HAUP_INT */ |
| 120 | IVTV_Z8F0811_IR_TX_I2C_ADDR, /* IVTV_HW_Z8F0811_IR_TX_HAUP */ |
| 121 | IVTV_Z8F0811_IR_RX_I2C_ADDR, /* IVTV_HW_Z8F0811_IR_RX_HAUP */ |
Mauro Carvalho Chehab | e1e2c57 | 2010-12-30 08:31:10 -0300 | [diff] [blame] | 122 | IVTV_ADAPTEC_IR_ADDR, /* IVTV_HW_I2C_IR_RX_ADAPTEC */ |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 123 | }; |
| 124 | |
| 125 | /* This array should match the IVTV_HW_ defines */ |
Jean Delvare | af29486 | 2008-05-18 20:49:40 +0200 | [diff] [blame] | 126 | static const char * const hw_devicenames[] = { |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 127 | "cx25840", |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 128 | "saa7115", |
Jean Delvare | 5daed07 | 2008-07-17 13:18:31 -0300 | [diff] [blame] | 129 | "saa7127_auto", /* saa7127 or saa7129 */ |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 130 | "msp3400", |
| 131 | "tuner", |
| 132 | "wm8775", |
| 133 | "cs53l32a", |
| 134 | "tveeprom", |
Jean Delvare | af29486 | 2008-05-18 20:49:40 +0200 | [diff] [blame] | 135 | "saa7114", |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 136 | "upd64031a", |
| 137 | "upd64083", |
| 138 | "saa717x", |
| 139 | "wm8739", |
Hans Verkuil | ac24743 | 2007-07-27 06:56:50 -0300 | [diff] [blame] | 140 | "vp27smpx", |
Hans Verkuil | e2a1774 | 2007-10-30 05:50:03 -0300 | [diff] [blame] | 141 | "m52790", |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 142 | "gpio", |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 143 | "ir_video", /* IVTV_HW_I2C_IR_RX_AVER */ |
| 144 | "ir_video", /* IVTV_HW_I2C_IR_RX_HAUP_EXT */ |
| 145 | "ir_video", /* IVTV_HW_I2C_IR_RX_HAUP_INT */ |
| 146 | "ir_tx_z8f0811_haup", /* IVTV_HW_Z8F0811_IR_TX_HAUP */ |
| 147 | "ir_rx_z8f0811_haup", /* IVTV_HW_Z8F0811_IR_RX_HAUP */ |
Mauro Carvalho Chehab | e1e2c57 | 2010-12-30 08:31:10 -0300 | [diff] [blame] | 148 | "ir_video", /* IVTV_HW_I2C_IR_RX_ADAPTEC */ |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 149 | }; |
| 150 | |
Mauro Carvalho Chehab | e1e2c57 | 2010-12-30 08:31:10 -0300 | [diff] [blame] | 151 | static int get_key_adaptec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw) |
| 152 | { |
| 153 | unsigned char keybuf[4]; |
| 154 | |
| 155 | keybuf[0] = 0x00; |
| 156 | i2c_master_send(ir->c, keybuf, 1); |
| 157 | /* poll IR chip */ |
| 158 | if (i2c_master_recv(ir->c, keybuf, sizeof(keybuf)) != sizeof(keybuf)) { |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | /* key pressed ? */ |
| 163 | if (keybuf[2] == 0xff) |
| 164 | return 0; |
| 165 | |
| 166 | /* remove repeat bit */ |
| 167 | keybuf[2] &= 0x7f; |
| 168 | keybuf[3] |= 0x80; |
| 169 | |
Mauro Carvalho Chehab | 9804ed9 | 2010-12-30 11:58:37 -0300 | [diff] [blame] | 170 | *ir_key = keybuf[3] | keybuf[2] << 8 | keybuf[1] << 16 |keybuf[0] << 24; |
| 171 | *ir_raw = *ir_key; |
Mauro Carvalho Chehab | e1e2c57 | 2010-12-30 08:31:10 -0300 | [diff] [blame] | 172 | |
| 173 | return 1; |
| 174 | } |
| 175 | |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 176 | static int ivtv_i2c_new_ir(struct ivtv *itv, u32 hw, const char *type, u8 addr) |
| 177 | { |
| 178 | struct i2c_board_info info; |
| 179 | struct i2c_adapter *adap = &itv->i2c_adap; |
| 180 | struct IR_i2c_init_data *init_data = &itv->ir_i2c_init_data; |
| 181 | unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; |
| 182 | |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 183 | /* Only allow one IR transmitter to be registered per board */ |
| 184 | if (hw & IVTV_HW_IR_TX_ANY) { |
| 185 | if (itv->hw_flags & IVTV_HW_IR_TX_ANY) |
| 186 | return -1; |
| 187 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 188 | strlcpy(info.type, type, I2C_NAME_SIZE); |
Jean Delvare | 9a94241 | 2010-08-11 18:20:56 +0200 | [diff] [blame] | 189 | return i2c_new_probed_device(adap, &info, addr_list, NULL) |
| 190 | == NULL ? -1 : 0; |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | /* Only allow one IR receiver to be registered per board */ |
| 194 | if (itv->hw_flags & IVTV_HW_IR_RX_ANY) |
| 195 | return -1; |
| 196 | |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 197 | /* Our default information for ir-kbd-i2c.c to use */ |
| 198 | switch (hw) { |
| 199 | case IVTV_HW_I2C_IR_RX_AVER: |
Mauro Carvalho Chehab | 02858ee | 2010-04-02 20:01:00 -0300 | [diff] [blame] | 200 | init_data->ir_codes = RC_MAP_AVERMEDIA_CARDBUS; |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 201 | init_data->internal_get_key_func = |
| 202 | IR_KBD_GET_KEY_AVERMEDIA_CARDBUS; |
Mauro Carvalho Chehab | 52b6614 | 2010-11-17 14:20:52 -0300 | [diff] [blame] | 203 | init_data->type = RC_TYPE_OTHER; |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 204 | init_data->name = "AVerMedia AVerTV card"; |
| 205 | break; |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 206 | case IVTV_HW_I2C_IR_RX_HAUP_EXT: |
| 207 | case IVTV_HW_I2C_IR_RX_HAUP_INT: |
Mauro Carvalho Chehab | 2062410 | 2011-01-24 22:23:08 -0300 | [diff] [blame] | 208 | init_data->ir_codes = RC_MAP_HAUPPAUGE; |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 209 | init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP; |
Mauro Carvalho Chehab | 52b6614 | 2010-11-17 14:20:52 -0300 | [diff] [blame] | 210 | init_data->type = RC_TYPE_RC5; |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 211 | init_data->name = itv->card_name; |
| 212 | break; |
| 213 | case IVTV_HW_Z8F0811_IR_RX_HAUP: |
| 214 | /* Default to grey remote */ |
Mauro Carvalho Chehab | af86ce7 | 2011-01-24 12:18:48 -0300 | [diff] [blame] | 215 | init_data->ir_codes = RC_MAP_HAUPPAUGE; |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 216 | init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; |
Mauro Carvalho Chehab | 52b6614 | 2010-11-17 14:20:52 -0300 | [diff] [blame] | 217 | init_data->type = RC_TYPE_RC5; |
Andy Walls | 7ce5c41 | 2009-11-21 16:19:27 -0300 | [diff] [blame] | 218 | init_data->name = itv->card_name; |
| 219 | break; |
Mauro Carvalho Chehab | e1e2c57 | 2010-12-30 08:31:10 -0300 | [diff] [blame] | 220 | case IVTV_HW_I2C_IR_RX_ADAPTEC: |
| 221 | init_data->get_key = get_key_adaptec; |
| 222 | init_data->name = itv->card_name; |
| 223 | /* FIXME: The protocol and RC_MAP needs to be corrected */ |
| 224 | init_data->ir_codes = RC_MAP_EMPTY; |
| 225 | init_data->type = RC_TYPE_UNKNOWN; |
| 226 | break; |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 230 | info.platform_data = init_data; |
| 231 | strlcpy(info.type, type, I2C_NAME_SIZE); |
| 232 | |
Jean Delvare | 9a94241 | 2010-08-11 18:20:56 +0200 | [diff] [blame] | 233 | return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? |
| 234 | -1 : 0; |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 235 | } |
| 236 | |
Andy Walls | bfbde8e | 2009-11-21 11:41:33 -0300 | [diff] [blame] | 237 | /* Instantiate the IR receiver device using probing -- undesirable */ |
| 238 | struct i2c_client *ivtv_i2c_new_ir_legacy(struct ivtv *itv) |
| 239 | { |
| 240 | struct i2c_board_info info; |
| 241 | /* |
| 242 | * The external IR receiver is at i2c address 0x34. |
| 243 | * The internal IR receiver is at i2c address 0x30. |
| 244 | * |
| 245 | * In theory, both can be fitted, and Hauppauge suggests an external |
| 246 | * overrides an internal. That's why we probe 0x1a (~0x34) first. CB |
| 247 | * |
| 248 | * Some of these addresses we probe may collide with other i2c address |
| 249 | * allocations, so this function must be called after all other i2c |
| 250 | * devices we care about are registered. |
| 251 | */ |
| 252 | const unsigned short addr_list[] = { |
| 253 | 0x1a, /* Hauppauge IR external - collides with WM8739 */ |
| 254 | 0x18, /* Hauppauge IR internal */ |
Andy Walls | bfbde8e | 2009-11-21 11:41:33 -0300 | [diff] [blame] | 255 | I2C_CLIENT_END |
| 256 | }; |
| 257 | |
| 258 | memset(&info, 0, sizeof(struct i2c_board_info)); |
| 259 | strlcpy(info.type, "ir_video", I2C_NAME_SIZE); |
Jean Delvare | 9a94241 | 2010-08-11 18:20:56 +0200 | [diff] [blame] | 260 | return i2c_new_probed_device(&itv->i2c_adap, &info, addr_list, NULL); |
Andy Walls | bfbde8e | 2009-11-21 11:41:33 -0300 | [diff] [blame] | 261 | } |
| 262 | |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 263 | int ivtv_i2c_register(struct ivtv *itv, unsigned idx) |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 264 | { |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 265 | struct v4l2_subdev *sd; |
| 266 | struct i2c_adapter *adap = &itv->i2c_adap; |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 267 | const char *type = hw_devicenames[idx]; |
| 268 | u32 hw = 1 << idx; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 269 | |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 270 | if (idx >= ARRAY_SIZE(hw_addrs)) |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 271 | return -1; |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 272 | if (hw == IVTV_HW_TUNER) { |
| 273 | /* special tuner handling */ |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 274 | sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, adap, type, 0, |
| 275 | itv->card_i2c->radio); |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 276 | if (sd) |
| 277 | sd->grp_id = 1 << idx; |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 278 | sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, adap, type, 0, |
| 279 | itv->card_i2c->demod); |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 280 | if (sd) |
| 281 | sd->grp_id = 1 << idx; |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 282 | sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, adap, type, 0, |
| 283 | itv->card_i2c->tv); |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 284 | if (sd) |
| 285 | sd->grp_id = 1 << idx; |
| 286 | return sd ? 0 : -1; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 287 | } |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 288 | |
| 289 | if (hw & IVTV_HW_IR_ANY) |
| 290 | return ivtv_i2c_new_ir(itv, hw, type, hw_addrs[idx]); |
| 291 | |
| 292 | /* Is it not an I2C device or one we do not wish to register? */ |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 293 | if (!hw_addrs[idx]) |
| 294 | return -1; |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 295 | |
| 296 | /* It's an I2C device other than an analog tuner or IR chip */ |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 297 | if (hw == IVTV_HW_UPD64031A || hw == IVTV_HW_UPD6408X) { |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 298 | sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 299 | adap, type, 0, I2C_ADDRS(hw_addrs[idx])); |
Hans Verkuil | 72c851b | 2010-08-06 10:53:19 -0300 | [diff] [blame] | 300 | } else if (hw == IVTV_HW_CX25840) { |
| 301 | struct cx25840_platform_data pdata; |
Hans Verkuil | 3c7c937 | 2011-01-08 07:08:02 -0300 | [diff] [blame] | 302 | struct i2c_board_info cx25840_info = { |
| 303 | .type = "cx25840", |
| 304 | .addr = hw_addrs[idx], |
| 305 | .platform_data = &pdata, |
| 306 | }; |
Hans Verkuil | 72c851b | 2010-08-06 10:53:19 -0300 | [diff] [blame] | 307 | |
| 308 | pdata.pvr150_workaround = itv->pvr150_workaround; |
Hans Verkuil | 3c7c937 | 2011-01-08 07:08:02 -0300 | [diff] [blame] | 309 | sd = v4l2_i2c_new_subdev_board(&itv->v4l2_dev, adap, |
| 310 | &cx25840_info, NULL); |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 311 | } else { |
Hans Verkuil | e6574f2 | 2009-04-01 03:57:53 -0300 | [diff] [blame] | 312 | sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 313 | adap, type, hw_addrs[idx], NULL); |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 314 | } |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 315 | if (sd) |
| 316 | sd->grp_id = 1 << idx; |
| 317 | return sd ? 0 : -1; |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 318 | } |
| 319 | |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 320 | struct v4l2_subdev *ivtv_find_hw(struct ivtv *itv, u32 hw) |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 321 | { |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 322 | struct v4l2_subdev *result = NULL; |
| 323 | struct v4l2_subdev *sd; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 324 | |
Hans Verkuil | 8ac05ae | 2009-02-07 07:02:27 -0300 | [diff] [blame] | 325 | spin_lock(&itv->v4l2_dev.lock); |
| 326 | v4l2_device_for_each_subdev(sd, &itv->v4l2_dev) { |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 327 | if (sd->grp_id == hw) { |
| 328 | result = sd; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 329 | break; |
| 330 | } |
| 331 | } |
Hans Verkuil | 8ac05ae | 2009-02-07 07:02:27 -0300 | [diff] [blame] | 332 | spin_unlock(&itv->v4l2_dev.lock); |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 333 | return result; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | /* Set the serial clock line to the desired state */ |
| 337 | static void ivtv_setscl(struct ivtv *itv, int state) |
| 338 | { |
| 339 | /* write them out */ |
| 340 | /* write bits are inverted */ |
| 341 | write_reg(~state, IVTV_REG_I2C_SETSCL_OFFSET); |
| 342 | } |
| 343 | |
| 344 | /* Set the serial data line to the desired state */ |
| 345 | static void ivtv_setsda(struct ivtv *itv, int state) |
| 346 | { |
| 347 | /* write them out */ |
| 348 | /* write bits are inverted */ |
| 349 | write_reg(~state & 1, IVTV_REG_I2C_SETSDA_OFFSET); |
| 350 | } |
| 351 | |
| 352 | /* Read the serial clock line */ |
| 353 | static int ivtv_getscl(struct ivtv *itv) |
| 354 | { |
| 355 | return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1; |
| 356 | } |
| 357 | |
| 358 | /* Read the serial data line */ |
| 359 | static int ivtv_getsda(struct ivtv *itv) |
| 360 | { |
| 361 | return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1; |
| 362 | } |
| 363 | |
| 364 | /* Implement a short delay by polling the serial clock line */ |
| 365 | static void ivtv_scldelay(struct ivtv *itv) |
| 366 | { |
| 367 | int i; |
| 368 | |
| 369 | for (i = 0; i < 5; ++i) |
| 370 | ivtv_getscl(itv); |
| 371 | } |
| 372 | |
| 373 | /* Wait for the serial clock line to become set to a specific value */ |
| 374 | static int ivtv_waitscl(struct ivtv *itv, int val) |
| 375 | { |
| 376 | int i; |
| 377 | |
| 378 | ivtv_scldelay(itv); |
| 379 | for (i = 0; i < 1000; ++i) { |
| 380 | if (ivtv_getscl(itv) == val) |
| 381 | return 1; |
| 382 | } |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | /* Wait for the serial data line to become set to a specific value */ |
| 387 | static int ivtv_waitsda(struct ivtv *itv, int val) |
| 388 | { |
| 389 | int i; |
| 390 | |
| 391 | ivtv_scldelay(itv); |
| 392 | for (i = 0; i < 1000; ++i) { |
| 393 | if (ivtv_getsda(itv) == val) |
| 394 | return 1; |
| 395 | } |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | /* Wait for the slave to issue an ACK */ |
| 400 | static int ivtv_ack(struct ivtv *itv) |
| 401 | { |
| 402 | int ret = 0; |
| 403 | |
| 404 | if (ivtv_getscl(itv) == 1) { |
Hans Verkuil | 11d2876 | 2007-07-17 12:47:38 -0300 | [diff] [blame] | 405 | IVTV_DEBUG_HI_I2C("SCL was high starting an ack\n"); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 406 | ivtv_setscl(itv, 0); |
| 407 | if (!ivtv_waitscl(itv, 0)) { |
| 408 | IVTV_DEBUG_I2C("Could not set SCL low starting an ack\n"); |
| 409 | return -EREMOTEIO; |
| 410 | } |
| 411 | } |
| 412 | ivtv_setsda(itv, 1); |
| 413 | ivtv_scldelay(itv); |
| 414 | ivtv_setscl(itv, 1); |
| 415 | if (!ivtv_waitsda(itv, 0)) { |
| 416 | IVTV_DEBUG_I2C("Slave did not ack\n"); |
| 417 | ret = -EREMOTEIO; |
| 418 | } |
| 419 | ivtv_setscl(itv, 0); |
| 420 | if (!ivtv_waitscl(itv, 0)) { |
| 421 | IVTV_DEBUG_I2C("Failed to set SCL low after ACK\n"); |
| 422 | ret = -EREMOTEIO; |
| 423 | } |
| 424 | return ret; |
| 425 | } |
| 426 | |
| 427 | /* Write a single byte to the i2c bus and wait for the slave to ACK */ |
| 428 | static int ivtv_sendbyte(struct ivtv *itv, unsigned char byte) |
| 429 | { |
| 430 | int i, bit; |
| 431 | |
Hans Verkuil | 11d2876 | 2007-07-17 12:47:38 -0300 | [diff] [blame] | 432 | IVTV_DEBUG_HI_I2C("write %x\n",byte); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 433 | for (i = 0; i < 8; ++i, byte<<=1) { |
| 434 | ivtv_setscl(itv, 0); |
| 435 | if (!ivtv_waitscl(itv, 0)) { |
| 436 | IVTV_DEBUG_I2C("Error setting SCL low\n"); |
| 437 | return -EREMOTEIO; |
| 438 | } |
| 439 | bit = (byte>>7)&1; |
| 440 | ivtv_setsda(itv, bit); |
| 441 | if (!ivtv_waitsda(itv, bit)) { |
| 442 | IVTV_DEBUG_I2C("Error setting SDA\n"); |
| 443 | return -EREMOTEIO; |
| 444 | } |
| 445 | ivtv_setscl(itv, 1); |
| 446 | if (!ivtv_waitscl(itv, 1)) { |
| 447 | IVTV_DEBUG_I2C("Slave not ready for bit\n"); |
| 448 | return -EREMOTEIO; |
| 449 | } |
| 450 | } |
| 451 | ivtv_setscl(itv, 0); |
| 452 | if (!ivtv_waitscl(itv, 0)) { |
| 453 | IVTV_DEBUG_I2C("Error setting SCL low\n"); |
| 454 | return -EREMOTEIO; |
| 455 | } |
| 456 | return ivtv_ack(itv); |
| 457 | } |
| 458 | |
| 459 | /* Read a byte from the i2c bus and send a NACK if applicable (i.e. for the |
| 460 | final byte) */ |
| 461 | static int ivtv_readbyte(struct ivtv *itv, unsigned char *byte, int nack) |
| 462 | { |
| 463 | int i; |
| 464 | |
| 465 | *byte = 0; |
| 466 | |
| 467 | ivtv_setsda(itv, 1); |
| 468 | ivtv_scldelay(itv); |
| 469 | for (i = 0; i < 8; ++i) { |
| 470 | ivtv_setscl(itv, 0); |
| 471 | ivtv_scldelay(itv); |
| 472 | ivtv_setscl(itv, 1); |
| 473 | if (!ivtv_waitscl(itv, 1)) { |
| 474 | IVTV_DEBUG_I2C("Error setting SCL high\n"); |
| 475 | return -EREMOTEIO; |
| 476 | } |
| 477 | *byte = ((*byte)<<1)|ivtv_getsda(itv); |
| 478 | } |
| 479 | ivtv_setscl(itv, 0); |
| 480 | ivtv_scldelay(itv); |
| 481 | ivtv_setsda(itv, nack); |
| 482 | ivtv_scldelay(itv); |
| 483 | ivtv_setscl(itv, 1); |
| 484 | ivtv_scldelay(itv); |
| 485 | ivtv_setscl(itv, 0); |
| 486 | ivtv_scldelay(itv); |
Hans Verkuil | 11d2876 | 2007-07-17 12:47:38 -0300 | [diff] [blame] | 487 | IVTV_DEBUG_HI_I2C("read %x\n",*byte); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | /* Issue a start condition on the i2c bus to alert slaves to prepare for |
| 492 | an address write */ |
| 493 | static int ivtv_start(struct ivtv *itv) |
| 494 | { |
| 495 | int sda; |
| 496 | |
| 497 | sda = ivtv_getsda(itv); |
| 498 | if (sda != 1) { |
Hans Verkuil | 11d2876 | 2007-07-17 12:47:38 -0300 | [diff] [blame] | 499 | IVTV_DEBUG_HI_I2C("SDA was low at start\n"); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 500 | ivtv_setsda(itv, 1); |
| 501 | if (!ivtv_waitsda(itv, 1)) { |
| 502 | IVTV_DEBUG_I2C("SDA stuck low\n"); |
| 503 | return -EREMOTEIO; |
| 504 | } |
| 505 | } |
| 506 | if (ivtv_getscl(itv) != 1) { |
| 507 | ivtv_setscl(itv, 1); |
| 508 | if (!ivtv_waitscl(itv, 1)) { |
| 509 | IVTV_DEBUG_I2C("SCL stuck low at start\n"); |
| 510 | return -EREMOTEIO; |
| 511 | } |
| 512 | } |
| 513 | ivtv_setsda(itv, 0); |
| 514 | ivtv_scldelay(itv); |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | /* Issue a stop condition on the i2c bus to release it */ |
| 519 | static int ivtv_stop(struct ivtv *itv) |
| 520 | { |
| 521 | int i; |
| 522 | |
| 523 | if (ivtv_getscl(itv) != 0) { |
Hans Verkuil | 11d2876 | 2007-07-17 12:47:38 -0300 | [diff] [blame] | 524 | IVTV_DEBUG_HI_I2C("SCL not low when stopping\n"); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 525 | ivtv_setscl(itv, 0); |
| 526 | if (!ivtv_waitscl(itv, 0)) { |
| 527 | IVTV_DEBUG_I2C("SCL could not be set low\n"); |
| 528 | } |
| 529 | } |
| 530 | ivtv_setsda(itv, 0); |
| 531 | ivtv_scldelay(itv); |
| 532 | ivtv_setscl(itv, 1); |
| 533 | if (!ivtv_waitscl(itv, 1)) { |
| 534 | IVTV_DEBUG_I2C("SCL could not be set high\n"); |
| 535 | return -EREMOTEIO; |
| 536 | } |
| 537 | ivtv_scldelay(itv); |
| 538 | ivtv_setsda(itv, 1); |
| 539 | if (!ivtv_waitsda(itv, 1)) { |
| 540 | IVTV_DEBUG_I2C("resetting I2C\n"); |
| 541 | for (i = 0; i < 16; ++i) { |
| 542 | ivtv_setscl(itv, 0); |
| 543 | ivtv_scldelay(itv); |
| 544 | ivtv_setscl(itv, 1); |
| 545 | ivtv_scldelay(itv); |
| 546 | ivtv_setsda(itv, 1); |
| 547 | } |
| 548 | ivtv_waitsda(itv, 1); |
| 549 | return -EREMOTEIO; |
| 550 | } |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | /* Write a message to the given i2c slave. do_stop may be 0 to prevent |
| 555 | issuing the i2c stop condition (when following with a read) */ |
| 556 | static int ivtv_write(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len, int do_stop) |
| 557 | { |
| 558 | int retry, ret = -EREMOTEIO; |
| 559 | u32 i; |
| 560 | |
| 561 | for (retry = 0; ret != 0 && retry < 8; ++retry) { |
| 562 | ret = ivtv_start(itv); |
| 563 | |
| 564 | if (ret == 0) { |
| 565 | ret = ivtv_sendbyte(itv, addr<<1); |
| 566 | for (i = 0; ret == 0 && i < len; ++i) |
| 567 | ret = ivtv_sendbyte(itv, data[i]); |
| 568 | } |
| 569 | if (ret != 0 || do_stop) { |
| 570 | ivtv_stop(itv); |
| 571 | } |
| 572 | } |
| 573 | if (ret) |
| 574 | IVTV_DEBUG_I2C("i2c write to %x failed\n", addr); |
| 575 | return ret; |
| 576 | } |
| 577 | |
| 578 | /* Read data from the given i2c slave. A stop condition is always issued. */ |
| 579 | static int ivtv_read(struct ivtv *itv, unsigned char addr, unsigned char *data, u32 len) |
| 580 | { |
| 581 | int retry, ret = -EREMOTEIO; |
| 582 | u32 i; |
| 583 | |
| 584 | for (retry = 0; ret != 0 && retry < 8; ++retry) { |
| 585 | ret = ivtv_start(itv); |
| 586 | if (ret == 0) |
| 587 | ret = ivtv_sendbyte(itv, (addr << 1) | 1); |
| 588 | for (i = 0; ret == 0 && i < len; ++i) { |
| 589 | ret = ivtv_readbyte(itv, &data[i], i == len - 1); |
| 590 | } |
| 591 | ivtv_stop(itv); |
| 592 | } |
| 593 | if (ret) |
| 594 | IVTV_DEBUG_I2C("i2c read from %x failed\n", addr); |
| 595 | return ret; |
| 596 | } |
| 597 | |
| 598 | /* Kernel i2c transfer implementation. Takes a number of messages to be read |
| 599 | or written. If a read follows a write, this will occur without an |
| 600 | intervening stop condition */ |
| 601 | static int ivtv_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) |
| 602 | { |
Hans Verkuil | 8ac05ae | 2009-02-07 07:02:27 -0300 | [diff] [blame] | 603 | struct v4l2_device *v4l2_dev = i2c_get_adapdata(i2c_adap); |
| 604 | struct ivtv *itv = to_ivtv(v4l2_dev); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 605 | int retval; |
| 606 | int i; |
| 607 | |
| 608 | mutex_lock(&itv->i2c_bus_lock); |
| 609 | for (i = retval = 0; retval == 0 && i < num; i++) { |
| 610 | if (msgs[i].flags & I2C_M_RD) |
| 611 | retval = ivtv_read(itv, msgs[i].addr, msgs[i].buf, msgs[i].len); |
| 612 | else { |
| 613 | /* if followed by a read, don't stop */ |
| 614 | int stop = !(i + 1 < num && msgs[i + 1].flags == I2C_M_RD); |
| 615 | |
| 616 | retval = ivtv_write(itv, msgs[i].addr, msgs[i].buf, msgs[i].len, stop); |
| 617 | } |
| 618 | } |
| 619 | mutex_unlock(&itv->i2c_bus_lock); |
| 620 | return retval ? retval : num; |
| 621 | } |
| 622 | |
| 623 | /* Kernel i2c capabilities */ |
| 624 | static u32 ivtv_functionality(struct i2c_adapter *adap) |
| 625 | { |
| 626 | return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; |
| 627 | } |
| 628 | |
| 629 | static struct i2c_algorithm ivtv_algo = { |
| 630 | .master_xfer = ivtv_xfer, |
| 631 | .functionality = ivtv_functionality, |
| 632 | }; |
| 633 | |
| 634 | /* template for our-bit banger */ |
| 635 | static struct i2c_adapter ivtv_i2c_adap_hw_template = { |
| 636 | .name = "ivtv i2c driver", |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 637 | .algo = &ivtv_algo, |
| 638 | .algo_data = NULL, /* filled from template */ |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 639 | .owner = THIS_MODULE, |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 640 | }; |
| 641 | |
| 642 | static void ivtv_setscl_old(void *data, int state) |
| 643 | { |
| 644 | struct ivtv *itv = (struct ivtv *)data; |
| 645 | |
| 646 | if (state) |
| 647 | itv->i2c_state |= 0x01; |
| 648 | else |
| 649 | itv->i2c_state &= ~0x01; |
| 650 | |
| 651 | /* write them out */ |
| 652 | /* write bits are inverted */ |
| 653 | write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET); |
| 654 | } |
| 655 | |
| 656 | static void ivtv_setsda_old(void *data, int state) |
| 657 | { |
| 658 | struct ivtv *itv = (struct ivtv *)data; |
| 659 | |
| 660 | if (state) |
| 661 | itv->i2c_state |= 0x01; |
| 662 | else |
| 663 | itv->i2c_state &= ~0x01; |
| 664 | |
| 665 | /* write them out */ |
| 666 | /* write bits are inverted */ |
| 667 | write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET); |
| 668 | } |
| 669 | |
| 670 | static int ivtv_getscl_old(void *data) |
| 671 | { |
| 672 | struct ivtv *itv = (struct ivtv *)data; |
| 673 | |
| 674 | return read_reg(IVTV_REG_I2C_GETSCL_OFFSET) & 1; |
| 675 | } |
| 676 | |
| 677 | static int ivtv_getsda_old(void *data) |
| 678 | { |
| 679 | struct ivtv *itv = (struct ivtv *)data; |
| 680 | |
| 681 | return read_reg(IVTV_REG_I2C_GETSDA_OFFSET) & 1; |
| 682 | } |
| 683 | |
| 684 | /* template for i2c-bit-algo */ |
| 685 | static struct i2c_adapter ivtv_i2c_adap_template = { |
| 686 | .name = "ivtv i2c driver", |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 687 | .algo = NULL, /* set by i2c-algo-bit */ |
| 688 | .algo_data = NULL, /* filled from template */ |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 689 | .owner = THIS_MODULE, |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 690 | }; |
| 691 | |
Andy Walls | f412d36 | 2009-11-21 01:47:45 -0300 | [diff] [blame] | 692 | #define IVTV_ALGO_BIT_TIMEOUT (2) /* seconds */ |
| 693 | |
Jean Delvare | aeb292d | 2007-08-23 15:45:41 -0300 | [diff] [blame] | 694 | static const struct i2c_algo_bit_data ivtv_i2c_algo_template = { |
| 695 | .setsda = ivtv_setsda_old, |
| 696 | .setscl = ivtv_setscl_old, |
| 697 | .getsda = ivtv_getsda_old, |
| 698 | .getscl = ivtv_getscl_old, |
Andy Walls | f412d36 | 2009-11-21 01:47:45 -0300 | [diff] [blame] | 699 | .udelay = IVTV_DEFAULT_I2C_CLOCK_PERIOD / 2, /* microseconds */ |
| 700 | .timeout = IVTV_ALGO_BIT_TIMEOUT * HZ, /* jiffies */ |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 701 | }; |
| 702 | |
| 703 | static struct i2c_client ivtv_i2c_client_template = { |
Andrew Morton | a415783 | 2007-03-07 11:28:33 -0300 | [diff] [blame] | 704 | .name = "ivtv internal", |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 705 | }; |
| 706 | |
Andy Walls | bfbde8e | 2009-11-21 11:41:33 -0300 | [diff] [blame] | 707 | /* init + register i2c adapter */ |
Adrian Bunk | 056827a | 2007-12-11 19:23:49 -0300 | [diff] [blame] | 708 | int init_ivtv_i2c(struct ivtv *itv) |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 709 | { |
Jean Delvare | c668f32 | 2009-05-13 16:48:50 -0300 | [diff] [blame] | 710 | int retval; |
| 711 | |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 712 | IVTV_DEBUG_I2C("i2c init\n"); |
| 713 | |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 714 | /* Sanity checks for the I2C hardware arrays. They must be the |
Andy Walls | ad2fe2d | 2009-11-21 12:52:34 -0300 | [diff] [blame] | 715 | * same size. |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 716 | */ |
Laurent Pinchart | 84d0d4f | 2010-09-24 09:58:51 -0300 | [diff] [blame] | 717 | if (ARRAY_SIZE(hw_devicenames) != ARRAY_SIZE(hw_addrs)) { |
Hans Verkuil | d900920 | 2007-12-07 21:01:15 -0300 | [diff] [blame] | 718 | IVTV_ERR("Mismatched I2C hardware arrays\n"); |
| 719 | return -ENODEV; |
| 720 | } |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 721 | if (itv->options.newi2c > 0) { |
| 722 | memcpy(&itv->i2c_adap, &ivtv_i2c_adap_hw_template, |
| 723 | sizeof(struct i2c_adapter)); |
| 724 | } else { |
| 725 | memcpy(&itv->i2c_adap, &ivtv_i2c_adap_template, |
| 726 | sizeof(struct i2c_adapter)); |
| 727 | memcpy(&itv->i2c_algo, &ivtv_i2c_algo_template, |
| 728 | sizeof(struct i2c_algo_bit_data)); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 729 | } |
Andy Walls | f412d36 | 2009-11-21 01:47:45 -0300 | [diff] [blame] | 730 | itv->i2c_algo.udelay = itv->options.i2c_clock_period / 2; |
Hans Verkuil | 0e614cd | 2007-12-21 21:33:36 -0300 | [diff] [blame] | 731 | itv->i2c_algo.data = itv; |
| 732 | itv->i2c_adap.algo_data = &itv->i2c_algo; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 733 | |
| 734 | sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d", |
Hans Verkuil | 67ec09f | 2008-11-29 19:38:23 -0300 | [diff] [blame] | 735 | itv->instance); |
Hans Verkuil | 8ac05ae | 2009-02-07 07:02:27 -0300 | [diff] [blame] | 736 | i2c_set_adapdata(&itv->i2c_adap, &itv->v4l2_dev); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 737 | |
| 738 | memcpy(&itv->i2c_client, &ivtv_i2c_client_template, |
| 739 | sizeof(struct i2c_client)); |
| 740 | itv->i2c_client.adapter = &itv->i2c_adap; |
Hans Verkuil | 8ac05ae | 2009-02-07 07:02:27 -0300 | [diff] [blame] | 741 | itv->i2c_adap.dev.parent = &itv->pdev->dev; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 742 | |
| 743 | IVTV_DEBUG_I2C("setting scl and sda to 1\n"); |
| 744 | ivtv_setscl(itv, 1); |
| 745 | ivtv_setsda(itv, 1); |
| 746 | |
| 747 | if (itv->options.newi2c > 0) |
Jean Delvare | c668f32 | 2009-05-13 16:48:50 -0300 | [diff] [blame] | 748 | retval = i2c_add_adapter(&itv->i2c_adap); |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 749 | else |
Jean Delvare | c668f32 | 2009-05-13 16:48:50 -0300 | [diff] [blame] | 750 | retval = i2c_bit_add_bus(&itv->i2c_adap); |
| 751 | |
Jean Delvare | c668f32 | 2009-05-13 16:48:50 -0300 | [diff] [blame] | 752 | return retval; |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 753 | } |
| 754 | |
David Miller | bb374b7 | 2007-10-30 21:23:48 -0700 | [diff] [blame] | 755 | void exit_ivtv_i2c(struct ivtv *itv) |
Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 756 | { |
| 757 | IVTV_DEBUG_I2C("i2c exit\n"); |
| 758 | |
| 759 | i2c_del_adapter(&itv->i2c_adap); |
| 760 | } |