1 /* 2 * cx18 I2C functions 3 * 4 * Derived from ivtv-i2c.c 5 * 6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> 7 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 */ 19 20 #include "cx18-driver.h" 21 #include "cx18-io.h" 22 #include "cx18-cards.h" 23 #include "cx18-gpio.h" 24 #include "cx18-i2c.h" 25 #include "cx18-irq.h" 26 27 #define CX18_REG_I2C_1_WR 0xf15000 28 #define CX18_REG_I2C_1_RD 0xf15008 29 #define CX18_REG_I2C_2_WR 0xf25100 30 #define CX18_REG_I2C_2_RD 0xf25108 31 32 #define SETSCL_BIT 0x0001 33 #define SETSDL_BIT 0x0002 34 #define GETSCL_BIT 0x0004 35 #define GETSDL_BIT 0x0008 36 37 #define CX18_CS5345_I2C_ADDR 0x4c 38 #define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70 39 #define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71 40 41 /* This array should match the CX18_HW_ defines */ 42 static const u8 hw_addrs[] = { 43 0, /* CX18_HW_TUNER */ 44 0, /* CX18_HW_TVEEPROM */ 45 CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */ 46 0, /* CX18_HW_DVB */ 47 0, /* CX18_HW_418_AV */ 48 0, /* CX18_HW_GPIO_MUX */ 49 0, /* CX18_HW_GPIO_RESET_CTRL */ 50 CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_HAUP */ 51 }; 52 53 /* This array should match the CX18_HW_ defines */ 54 /* This might well become a card-specific array */ 55 static const u8 hw_bus[] = { 56 1, /* CX18_HW_TUNER */ 57 0, /* CX18_HW_TVEEPROM */ 58 0, /* CX18_HW_CS5345 */ 59 0, /* CX18_HW_DVB */ 60 0, /* CX18_HW_418_AV */ 61 0, /* CX18_HW_GPIO_MUX */ 62 0, /* CX18_HW_GPIO_RESET_CTRL */ 63 0, /* CX18_HW_Z8F0811_IR_HAUP */ 64 }; 65 66 /* This array should match the CX18_HW_ defines */ 67 static const char * const hw_devicenames[] = { 68 "tuner", 69 "tveeprom", 70 "cs5345", 71 "cx23418_DTV", 72 "cx23418_AV", 73 "gpio_mux", 74 "gpio_reset_ctrl", 75 "ir_z8f0811_haup", 76 }; 77 78 static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, 79 const char *type, u8 addr) 80 { 81 struct i2c_board_info info; 82 struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; 83 unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; 84 85 memset(&info, 0, sizeof(struct i2c_board_info)); 86 strscpy(info.type, type, I2C_NAME_SIZE); 87 88 /* Our default information for ir-kbd-i2c.c to use */ 89 switch (hw) { 90 case CX18_HW_Z8F0811_IR_HAUP: 91 init_data->ir_codes = RC_MAP_HAUPPAUGE; 92 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; 93 init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | 94 RC_PROTO_BIT_RC6_6A_32; 95 init_data->name = cx->card_name; 96 info.platform_data = init_data; 97 break; 98 } 99 100 return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? 101 -1 : 0; 102 } 103 104 int cx18_i2c_register(struct cx18 *cx, unsigned idx) 105 { 106 struct v4l2_subdev *sd; 107 int bus = hw_bus[idx]; 108 struct i2c_adapter *adap = &cx->i2c_adap[bus]; 109 const char *type = hw_devicenames[idx]; 110 u32 hw = 1 << idx; 111 112 if (hw == CX18_HW_TUNER) { 113 /* special tuner group handling */ 114 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 115 adap, type, 0, cx->card_i2c->radio); 116 if (sd != NULL) 117 sd->grp_id = hw; 118 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 119 adap, type, 0, cx->card_i2c->demod); 120 if (sd != NULL) 121 sd->grp_id = hw; 122 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 123 adap, type, 0, cx->card_i2c->tv); 124 if (sd != NULL) 125 sd->grp_id = hw; 126 return sd != NULL ? 0 : -1; 127 } 128 129 if (hw == CX18_HW_Z8F0811_IR_HAUP) 130 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); 131 132 /* Is it not an I2C device or one we do not wish to register? */ 133 if (!hw_addrs[idx]) 134 return -1; 135 136 /* It's an I2C device other than an analog tuner or IR chip */ 137 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx], 138 NULL); 139 if (sd != NULL) 140 sd->grp_id = hw; 141 return sd != NULL ? 0 : -1; 142 } 143 144 /* Find the first member of the subdev group id in hw */ 145 struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) 146 { 147 struct v4l2_subdev *result = NULL; 148 struct v4l2_subdev *sd; 149 150 spin_lock(&cx->v4l2_dev.lock); 151 v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { 152 if (sd->grp_id == hw) { 153 result = sd; 154 break; 155 } 156 } 157 spin_unlock(&cx->v4l2_dev.lock); 158 return result; 159 } 160 161 static void cx18_setscl(void *data, int state) 162 { 163 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 164 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 165 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 166 u32 r = cx18_read_reg(cx, addr); 167 168 if (state) 169 cx18_write_reg(cx, r | SETSCL_BIT, addr); 170 else 171 cx18_write_reg(cx, r & ~SETSCL_BIT, addr); 172 } 173 174 static void cx18_setsda(void *data, int state) 175 { 176 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 177 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 178 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 179 u32 r = cx18_read_reg(cx, addr); 180 181 if (state) 182 cx18_write_reg(cx, r | SETSDL_BIT, addr); 183 else 184 cx18_write_reg(cx, r & ~SETSDL_BIT, addr); 185 } 186 187 static int cx18_getscl(void *data) 188 { 189 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 190 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 191 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 192 193 return cx18_read_reg(cx, addr) & GETSCL_BIT; 194 } 195 196 static int cx18_getsda(void *data) 197 { 198 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 199 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 200 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 201 202 return cx18_read_reg(cx, addr) & GETSDL_BIT; 203 } 204 205 /* template for i2c-bit-algo */ 206 static const struct i2c_adapter cx18_i2c_adap_template = { 207 .name = "cx18 i2c driver", 208 .algo = NULL, /* set by i2c-algo-bit */ 209 .algo_data = NULL, /* filled from template */ 210 .owner = THIS_MODULE, 211 }; 212 213 #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ 214 #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ 215 216 static const struct i2c_algo_bit_data cx18_i2c_algo_template = { 217 .setsda = cx18_setsda, 218 .setscl = cx18_setscl, 219 .getsda = cx18_getsda, 220 .getscl = cx18_getscl, 221 .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ 222 .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ 223 }; 224 225 /* init + register i2c adapter */ 226 int init_cx18_i2c(struct cx18 *cx) 227 { 228 int i, err; 229 CX18_DEBUG_I2C("i2c init\n"); 230 231 for (i = 0; i < 2; i++) { 232 /* Setup algorithm for adapter */ 233 cx->i2c_algo[i] = cx18_i2c_algo_template; 234 cx->i2c_algo_cb_data[i].cx = cx; 235 cx->i2c_algo_cb_data[i].bus_index = i; 236 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; 237 238 /* Setup adapter */ 239 cx->i2c_adap[i] = cx18_i2c_adap_template; 240 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; 241 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), 242 " #%d-%d", cx->instance, i); 243 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); 244 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; 245 } 246 247 if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { 248 /* Reset/Unreset I2C hardware block */ 249 /* Clock select 220MHz */ 250 cx18_write_reg_expect(cx, 0x10000000, 0xc71004, 251 0x00000000, 0x10001000); 252 /* Clock Enable */ 253 cx18_write_reg_expect(cx, 0x10001000, 0xc71024, 254 0x00001000, 0x10001000); 255 } 256 /* courtesy of Steven Toth <stoth@hauppauge.com> */ 257 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 258 mdelay(10); 259 cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); 260 mdelay(10); 261 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 262 mdelay(10); 263 264 /* Set to edge-triggered intrs. */ 265 cx18_write_reg(cx, 0x00c00000, 0xc730c8); 266 /* Clear any stale intrs */ 267 cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, 268 ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); 269 270 /* Hw I2C1 Clock Freq ~100kHz */ 271 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); 272 cx18_setscl(&cx->i2c_algo_cb_data[0], 1); 273 cx18_setsda(&cx->i2c_algo_cb_data[0], 1); 274 275 /* Hw I2C2 Clock Freq ~100kHz */ 276 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); 277 cx18_setscl(&cx->i2c_algo_cb_data[1], 1); 278 cx18_setsda(&cx->i2c_algo_cb_data[1], 1); 279 280 cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, 281 core, reset, (u32) CX18_GPIO_RESET_I2C); 282 283 err = i2c_bit_add_bus(&cx->i2c_adap[0]); 284 if (err) 285 goto err; 286 err = i2c_bit_add_bus(&cx->i2c_adap[1]); 287 if (err) 288 goto err_del_bus_0; 289 return 0; 290 291 err_del_bus_0: 292 i2c_del_adapter(&cx->i2c_adap[0]); 293 err: 294 return err; 295 } 296 297 void exit_cx18_i2c(struct cx18 *cx) 298 { 299 int i; 300 CX18_DEBUG_I2C("i2c exit\n"); 301 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, 302 CX18_REG_I2C_1_WR); 303 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, 304 CX18_REG_I2C_2_WR); 305 306 for (i = 0; i < 2; i++) { 307 i2c_del_adapter(&cx->i2c_adap[i]); 308 } 309 } 310 311 /* 312 Hauppauge HVR1600 should have: 313 32 cx24227 314 98 unknown 315 a0 eeprom 316 c2 tuner 317 e? zilog ir 318 */ 319