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_TX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_TX_HAUP */ 51 CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_RX_HAUP */ 52 }; 53 54 /* This array should match the CX18_HW_ defines */ 55 /* This might well become a card-specific array */ 56 static const u8 hw_bus[] = { 57 1, /* CX18_HW_TUNER */ 58 0, /* CX18_HW_TVEEPROM */ 59 0, /* CX18_HW_CS5345 */ 60 0, /* CX18_HW_DVB */ 61 0, /* CX18_HW_418_AV */ 62 0, /* CX18_HW_GPIO_MUX */ 63 0, /* CX18_HW_GPIO_RESET_CTRL */ 64 0, /* CX18_HW_Z8F0811_IR_TX_HAUP */ 65 0, /* CX18_HW_Z8F0811_IR_RX_HAUP */ 66 }; 67 68 /* This array should match the CX18_HW_ defines */ 69 static const char * const hw_devicenames[] = { 70 "tuner", 71 "tveeprom", 72 "cs5345", 73 "cx23418_DTV", 74 "cx23418_AV", 75 "gpio_mux", 76 "gpio_reset_ctrl", 77 "ir_tx_z8f0811_haup", 78 "ir_rx_z8f0811_haup", 79 }; 80 81 static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, 82 const char *type, u8 addr) 83 { 84 struct i2c_board_info info; 85 struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; 86 unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; 87 88 memset(&info, 0, sizeof(struct i2c_board_info)); 89 strlcpy(info.type, type, I2C_NAME_SIZE); 90 91 /* Our default information for ir-kbd-i2c.c to use */ 92 switch (hw) { 93 case CX18_HW_Z8F0811_IR_RX_HAUP: 94 init_data->ir_codes = RC_MAP_HAUPPAUGE; 95 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; 96 init_data->type = RC_BIT_RC5 | RC_BIT_RC6_MCE | 97 RC_BIT_RC6_6A_32; 98 init_data->name = cx->card_name; 99 info.platform_data = init_data; 100 break; 101 } 102 103 return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? 104 -1 : 0; 105 } 106 107 int cx18_i2c_register(struct cx18 *cx, unsigned idx) 108 { 109 struct v4l2_subdev *sd; 110 int bus = hw_bus[idx]; 111 struct i2c_adapter *adap = &cx->i2c_adap[bus]; 112 const char *type = hw_devicenames[idx]; 113 u32 hw = 1 << idx; 114 115 if (hw == CX18_HW_TUNER) { 116 /* special tuner group handling */ 117 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 118 adap, type, 0, cx->card_i2c->radio); 119 if (sd != NULL) 120 sd->grp_id = hw; 121 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 122 adap, type, 0, cx->card_i2c->demod); 123 if (sd != NULL) 124 sd->grp_id = hw; 125 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 126 adap, type, 0, cx->card_i2c->tv); 127 if (sd != NULL) 128 sd->grp_id = hw; 129 return sd != NULL ? 0 : -1; 130 } 131 132 if (hw & CX18_HW_IR_ANY) 133 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); 134 135 /* Is it not an I2C device or one we do not wish to register? */ 136 if (!hw_addrs[idx]) 137 return -1; 138 139 /* It's an I2C device other than an analog tuner or IR chip */ 140 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx], 141 NULL); 142 if (sd != NULL) 143 sd->grp_id = hw; 144 return sd != NULL ? 0 : -1; 145 } 146 147 /* Find the first member of the subdev group id in hw */ 148 struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) 149 { 150 struct v4l2_subdev *result = NULL; 151 struct v4l2_subdev *sd; 152 153 spin_lock(&cx->v4l2_dev.lock); 154 v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { 155 if (sd->grp_id == hw) { 156 result = sd; 157 break; 158 } 159 } 160 spin_unlock(&cx->v4l2_dev.lock); 161 return result; 162 } 163 164 static void cx18_setscl(void *data, int state) 165 { 166 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 167 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 168 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 169 u32 r = cx18_read_reg(cx, addr); 170 171 if (state) 172 cx18_write_reg(cx, r | SETSCL_BIT, addr); 173 else 174 cx18_write_reg(cx, r & ~SETSCL_BIT, addr); 175 } 176 177 static void cx18_setsda(void *data, int state) 178 { 179 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 180 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 181 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 182 u32 r = cx18_read_reg(cx, addr); 183 184 if (state) 185 cx18_write_reg(cx, r | SETSDL_BIT, addr); 186 else 187 cx18_write_reg(cx, r & ~SETSDL_BIT, addr); 188 } 189 190 static int cx18_getscl(void *data) 191 { 192 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 193 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 194 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 195 196 return cx18_read_reg(cx, addr) & GETSCL_BIT; 197 } 198 199 static int cx18_getsda(void *data) 200 { 201 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 202 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 203 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 204 205 return cx18_read_reg(cx, addr) & GETSDL_BIT; 206 } 207 208 /* template for i2c-bit-algo */ 209 static struct i2c_adapter cx18_i2c_adap_template = { 210 .name = "cx18 i2c driver", 211 .algo = NULL, /* set by i2c-algo-bit */ 212 .algo_data = NULL, /* filled from template */ 213 .owner = THIS_MODULE, 214 }; 215 216 #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ 217 #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ 218 219 static struct i2c_algo_bit_data cx18_i2c_algo_template = { 220 .setsda = cx18_setsda, 221 .setscl = cx18_setscl, 222 .getsda = cx18_getsda, 223 .getscl = cx18_getscl, 224 .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ 225 .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ 226 }; 227 228 /* init + register i2c adapter */ 229 int init_cx18_i2c(struct cx18 *cx) 230 { 231 int i, err; 232 CX18_DEBUG_I2C("i2c init\n"); 233 234 for (i = 0; i < 2; i++) { 235 /* Setup algorithm for adapter */ 236 cx->i2c_algo[i] = cx18_i2c_algo_template; 237 cx->i2c_algo_cb_data[i].cx = cx; 238 cx->i2c_algo_cb_data[i].bus_index = i; 239 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; 240 241 /* Setup adapter */ 242 cx->i2c_adap[i] = cx18_i2c_adap_template; 243 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; 244 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), 245 " #%d-%d", cx->instance, i); 246 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); 247 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; 248 } 249 250 if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { 251 /* Reset/Unreset I2C hardware block */ 252 /* Clock select 220MHz */ 253 cx18_write_reg_expect(cx, 0x10000000, 0xc71004, 254 0x00000000, 0x10001000); 255 /* Clock Enable */ 256 cx18_write_reg_expect(cx, 0x10001000, 0xc71024, 257 0x00001000, 0x10001000); 258 } 259 /* courtesy of Steven Toth <stoth@hauppauge.com> */ 260 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 261 mdelay(10); 262 cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); 263 mdelay(10); 264 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 265 mdelay(10); 266 267 /* Set to edge-triggered intrs. */ 268 cx18_write_reg(cx, 0x00c00000, 0xc730c8); 269 /* Clear any stale intrs */ 270 cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, 271 ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); 272 273 /* Hw I2C1 Clock Freq ~100kHz */ 274 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); 275 cx18_setscl(&cx->i2c_algo_cb_data[0], 1); 276 cx18_setsda(&cx->i2c_algo_cb_data[0], 1); 277 278 /* Hw I2C2 Clock Freq ~100kHz */ 279 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); 280 cx18_setscl(&cx->i2c_algo_cb_data[1], 1); 281 cx18_setsda(&cx->i2c_algo_cb_data[1], 1); 282 283 cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, 284 core, reset, (u32) CX18_GPIO_RESET_I2C); 285 286 err = i2c_bit_add_bus(&cx->i2c_adap[0]); 287 if (err) 288 goto err; 289 err = i2c_bit_add_bus(&cx->i2c_adap[1]); 290 if (err) 291 goto err_del_bus_0; 292 return 0; 293 294 err_del_bus_0: 295 i2c_del_adapter(&cx->i2c_adap[0]); 296 err: 297 return err; 298 } 299 300 void exit_cx18_i2c(struct cx18 *cx) 301 { 302 int i; 303 CX18_DEBUG_I2C("i2c exit\n"); 304 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, 305 CX18_REG_I2C_1_WR); 306 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, 307 CX18_REG_I2C_2_WR); 308 309 for (i = 0; i < 2; i++) { 310 i2c_del_adapter(&cx->i2c_adap[i]); 311 } 312 } 313 314 /* 315 Hauppauge HVR1600 should have: 316 32 cx24227 317 98 unknown 318 a0 eeprom 319 c2 tuner 320 e? zilog ir 321 */ 322