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 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 22 * 02111-1307 USA 23 */ 24 25#include "cx18-driver.h" 26#include "cx18-io.h" 27#include "cx18-cards.h" 28#include "cx18-gpio.h" 29#include "cx18-i2c.h" 30#include "cx18-irq.h" 31 32#define CX18_REG_I2C_1_WR 0xf15000 33#define CX18_REG_I2C_1_RD 0xf15008 34#define CX18_REG_I2C_2_WR 0xf25100 35#define CX18_REG_I2C_2_RD 0xf25108 36 37#define SETSCL_BIT 0x0001 38#define SETSDL_BIT 0x0002 39#define GETSCL_BIT 0x0004 40#define GETSDL_BIT 0x0008 41 42#define CX18_CS5345_I2C_ADDR 0x4c 43#define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70 44#define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71 45 46/* This array should match the CX18_HW_ defines */ 47static const u8 hw_addrs[] = { 48 0, /* CX18_HW_TUNER */ 49 0, /* CX18_HW_TVEEPROM */ 50 CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */ 51 0, /* CX18_HW_DVB */ 52 0, /* CX18_HW_418_AV */ 53 0, /* CX18_HW_GPIO_MUX */ 54 0, /* CX18_HW_GPIO_RESET_CTRL */ 55 CX18_Z8F0811_IR_TX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_TX_HAUP */ 56 CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_RX_HAUP */ 57}; 58 59/* This array should match the CX18_HW_ defines */ 60/* This might well become a card-specific array */ 61static const u8 hw_bus[] = { 62 1, /* CX18_HW_TUNER */ 63 0, /* CX18_HW_TVEEPROM */ 64 0, /* CX18_HW_CS5345 */ 65 0, /* CX18_HW_DVB */ 66 0, /* CX18_HW_418_AV */ 67 0, /* CX18_HW_GPIO_MUX */ 68 0, /* CX18_HW_GPIO_RESET_CTRL */ 69 0, /* CX18_HW_Z8F0811_IR_TX_HAUP */ 70 0, /* CX18_HW_Z8F0811_IR_RX_HAUP */ 71}; 72 73/* This array should match the CX18_HW_ defines */ 74static const char * const hw_modules[] = { 75 "tuner", /* CX18_HW_TUNER */ 76 NULL, /* CX18_HW_TVEEPROM */ 77 "cs5345", /* CX18_HW_CS5345 */ 78 NULL, /* CX18_HW_DVB */ 79 NULL, /* CX18_HW_418_AV */ 80 NULL, /* CX18_HW_GPIO_MUX */ 81 NULL, /* CX18_HW_GPIO_RESET_CTRL */ 82 NULL, /* CX18_HW_Z8F0811_IR_TX_HAUP */ 83 NULL, /* CX18_HW_Z8F0811_IR_RX_HAUP */ 84}; 85 86/* This array should match the CX18_HW_ defines */ 87static const char * const hw_devicenames[] = { 88 "tuner", 89 "tveeprom", 90 "cs5345", 91 "cx23418_DTV", 92 "cx23418_AV", 93 "gpio_mux", 94 "gpio_reset_ctrl", 95 "ir_tx_z8f0811_haup", 96 "ir_rx_z8f0811_haup", 97}; 98 99static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, 100 const char *type, u8 addr) 101{ 102 struct i2c_board_info info; 103 struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; 104 unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; 105 106 memset(&info, 0, sizeof(struct i2c_board_info)); 107 strlcpy(info.type, type, I2C_NAME_SIZE); 108 109 /* Our default information for ir-kbd-i2c.c to use */ 110 switch (hw) { 111 case CX18_HW_Z8F0811_IR_RX_HAUP: 112 init_data->ir_codes = RC_MAP_HAUPPAUGE_NEW; 113 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; 114 init_data->type = IR_TYPE_RC5; 115 init_data->name = cx->card_name; 116 info.platform_data = init_data; 117 break; 118 } 119 120 return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? 121 -1 : 0; 122} 123 124int cx18_i2c_register(struct cx18 *cx, unsigned idx) 125{ 126 struct v4l2_subdev *sd; 127 int bus = hw_bus[idx]; 128 struct i2c_adapter *adap = &cx->i2c_adap[bus]; 129 const char *mod = hw_modules[idx]; 130 const char *type = hw_devicenames[idx]; 131 u32 hw = 1 << idx; 132 133 if (idx >= ARRAY_SIZE(hw_addrs)) 134 return -1; 135 136 if (hw == CX18_HW_TUNER) { 137 /* special tuner group handling */ 138 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 139 adap, mod, type, 0, cx->card_i2c->radio); 140 if (sd != NULL) 141 sd->grp_id = hw; 142 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 143 adap, mod, type, 0, cx->card_i2c->demod); 144 if (sd != NULL) 145 sd->grp_id = hw; 146 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 147 adap, mod, type, 0, cx->card_i2c->tv); 148 if (sd != NULL) 149 sd->grp_id = hw; 150 return sd != NULL ? 0 : -1; 151 } 152 153 if (hw & CX18_HW_IR_ANY) 154 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); 155 156 /* Is it not an I2C device or one we do not wish to register? */ 157 if (!hw_addrs[idx]) 158 return -1; 159 160 /* It's an I2C device other than an analog tuner or IR chip */ 161 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, mod, type, hw_addrs[idx], NULL); 162 if (sd != NULL) 163 sd->grp_id = hw; 164 return sd != NULL ? 0 : -1; 165} 166 167/* Find the first member of the subdev group id in hw */ 168struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) 169{ 170 struct v4l2_subdev *result = NULL; 171 struct v4l2_subdev *sd; 172 173 spin_lock(&cx->v4l2_dev.lock); 174 v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { 175 if (sd->grp_id == hw) { 176 result = sd; 177 break; 178 } 179 } 180 spin_unlock(&cx->v4l2_dev.lock); 181 return result; 182} 183 184static void cx18_setscl(void *data, int state) 185{ 186 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 187 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 188 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 189 u32 r = cx18_read_reg(cx, addr); 190 191 if (state) 192 cx18_write_reg(cx, r | SETSCL_BIT, addr); 193 else 194 cx18_write_reg(cx, r & ~SETSCL_BIT, addr); 195} 196 197static void cx18_setsda(void *data, int state) 198{ 199 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 200 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 201 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 202 u32 r = cx18_read_reg(cx, addr); 203 204 if (state) 205 cx18_write_reg(cx, r | SETSDL_BIT, addr); 206 else 207 cx18_write_reg(cx, r & ~SETSDL_BIT, addr); 208} 209 210static int cx18_getscl(void *data) 211{ 212 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 213 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 214 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 215 216 return cx18_read_reg(cx, addr) & GETSCL_BIT; 217} 218 219static int cx18_getsda(void *data) 220{ 221 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 222 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 223 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 224 225 return cx18_read_reg(cx, addr) & GETSDL_BIT; 226} 227 228/* template for i2c-bit-algo */ 229static struct i2c_adapter cx18_i2c_adap_template = { 230 .name = "cx18 i2c driver", 231 .algo = NULL, /* set by i2c-algo-bit */ 232 .algo_data = NULL, /* filled from template */ 233 .owner = THIS_MODULE, 234}; 235 236#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ 237#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ 238 239static struct i2c_algo_bit_data cx18_i2c_algo_template = { 240 .setsda = cx18_setsda, 241 .setscl = cx18_setscl, 242 .getsda = cx18_getsda, 243 .getscl = cx18_getscl, 244 .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ 245 .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ 246}; 247 248/* init + register i2c algo-bit adapter */ 249int init_cx18_i2c(struct cx18 *cx) 250{ 251 int i, err; 252 CX18_DEBUG_I2C("i2c init\n"); 253 254 for (i = 0; i < 2; i++) { 255 /* Setup algorithm for adapter */ 256 memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template, 257 sizeof(struct i2c_algo_bit_data)); 258 cx->i2c_algo_cb_data[i].cx = cx; 259 cx->i2c_algo_cb_data[i].bus_index = i; 260 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; 261 262 /* Setup adapter */ 263 memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template, 264 sizeof(struct i2c_adapter)); 265 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; 266 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), 267 " #%d-%d", cx->instance, i); 268 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); 269 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; 270 } 271 272 if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { 273 /* Reset/Unreset I2C hardware block */ 274 /* Clock select 220MHz */ 275 cx18_write_reg_expect(cx, 0x10000000, 0xc71004, 276 0x00000000, 0x10001000); 277 /* Clock Enable */ 278 cx18_write_reg_expect(cx, 0x10001000, 0xc71024, 279 0x00001000, 0x10001000); 280 } 281 /* courtesy of Steven Toth <stoth@hauppauge.com> */ 282 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 283 mdelay(10); 284 cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); 285 mdelay(10); 286 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 287 mdelay(10); 288 289 /* Set to edge-triggered intrs. */ 290 cx18_write_reg(cx, 0x00c00000, 0xc730c8); 291 /* Clear any stale intrs */ 292 cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, 293 ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); 294 295 /* Hw I2C1 Clock Freq ~100kHz */ 296 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); 297 cx18_setscl(&cx->i2c_algo_cb_data[0], 1); 298 cx18_setsda(&cx->i2c_algo_cb_data[0], 1); 299 300 /* Hw I2C2 Clock Freq ~100kHz */ 301 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); 302 cx18_setscl(&cx->i2c_algo_cb_data[1], 1); 303 cx18_setsda(&cx->i2c_algo_cb_data[1], 1); 304 305 cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, 306 core, reset, (u32) CX18_GPIO_RESET_I2C); 307 308 err = i2c_bit_add_bus(&cx->i2c_adap[0]); 309 if (err) 310 goto err; 311 err = i2c_bit_add_bus(&cx->i2c_adap[1]); 312 if (err) 313 goto err_del_bus_0; 314 return 0; 315 316 err_del_bus_0: 317 i2c_del_adapter(&cx->i2c_adap[0]); 318 err: 319 return err; 320} 321 322void exit_cx18_i2c(struct cx18 *cx) 323{ 324 int i; 325 CX18_DEBUG_I2C("i2c exit\n"); 326 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, 327 CX18_REG_I2C_1_WR); 328 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, 329 CX18_REG_I2C_2_WR); 330 331 for (i = 0; i < 2; i++) { 332 i2c_del_adapter(&cx->i2c_adap[i]); 333 } 334} 335 336/* 337 Hauppauge HVR1600 should have: 338 32 cx24227 339 98 unknown 340 a0 eeprom 341 c2 tuner 342 e? zilog ir 343 */ 344