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_devicenames[] = { 75 "tuner", 76 "tveeprom", 77 "cs5345", 78 "cx23418_DTV", 79 "cx23418_AV", 80 "gpio_mux", 81 "gpio_reset_ctrl", 82 "ir_tx_z8f0811_haup", 83 "ir_rx_z8f0811_haup", 84}; 85 86static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, 87 const char *type, u8 addr) 88{ 89 struct i2c_board_info info; 90 struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; 91 unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; 92 93 memset(&info, 0, sizeof(struct i2c_board_info)); 94 strlcpy(info.type, type, I2C_NAME_SIZE); 95 96 /* Our default information for ir-kbd-i2c.c to use */ 97 switch (hw) { 98 case CX18_HW_Z8F0811_IR_RX_HAUP: 99 init_data->ir_codes = RC_MAP_HAUPPAUGE; 100 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; 101 init_data->type = RC_TYPE_RC5; 102 init_data->name = cx->card_name; 103 info.platform_data = init_data; 104 break; 105 } 106 107 return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? 108 -1 : 0; 109} 110 111int cx18_i2c_register(struct cx18 *cx, unsigned idx) 112{ 113 struct v4l2_subdev *sd; 114 int bus = hw_bus[idx]; 115 struct i2c_adapter *adap = &cx->i2c_adap[bus]; 116 const char *type = hw_devicenames[idx]; 117 u32 hw = 1 << idx; 118 119 if (idx >= ARRAY_SIZE(hw_addrs)) 120 return -1; 121 122 if (hw == CX18_HW_TUNER) { 123 /* special tuner group handling */ 124 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 125 adap, type, 0, cx->card_i2c->radio); 126 if (sd != NULL) 127 sd->grp_id = hw; 128 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 129 adap, type, 0, cx->card_i2c->demod); 130 if (sd != NULL) 131 sd->grp_id = hw; 132 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 133 adap, type, 0, cx->card_i2c->tv); 134 if (sd != NULL) 135 sd->grp_id = hw; 136 return sd != NULL ? 0 : -1; 137 } 138 139 if (hw & CX18_HW_IR_ANY) 140 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); 141 142 /* Is it not an I2C device or one we do not wish to register? */ 143 if (!hw_addrs[idx]) 144 return -1; 145 146 /* It's an I2C device other than an analog tuner or IR chip */ 147 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx], 148 NULL); 149 if (sd != NULL) 150 sd->grp_id = hw; 151 return sd != NULL ? 0 : -1; 152} 153 154/* Find the first member of the subdev group id in hw */ 155struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) 156{ 157 struct v4l2_subdev *result = NULL; 158 struct v4l2_subdev *sd; 159 160 spin_lock(&cx->v4l2_dev.lock); 161 v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { 162 if (sd->grp_id == hw) { 163 result = sd; 164 break; 165 } 166 } 167 spin_unlock(&cx->v4l2_dev.lock); 168 return result; 169} 170 171static void cx18_setscl(void *data, int state) 172{ 173 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 174 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 175 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 176 u32 r = cx18_read_reg(cx, addr); 177 178 if (state) 179 cx18_write_reg(cx, r | SETSCL_BIT, addr); 180 else 181 cx18_write_reg(cx, r & ~SETSCL_BIT, addr); 182} 183 184static void cx18_setsda(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 | SETSDL_BIT, addr); 193 else 194 cx18_write_reg(cx, r & ~SETSDL_BIT, addr); 195} 196 197static int cx18_getscl(void *data) 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_RD : CX18_REG_I2C_1_RD; 202 203 return cx18_read_reg(cx, addr) & GETSCL_BIT; 204} 205 206static int cx18_getsda(void *data) 207{ 208 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 209 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 210 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 211 212 return cx18_read_reg(cx, addr) & GETSDL_BIT; 213} 214 215/* template for i2c-bit-algo */ 216static struct i2c_adapter cx18_i2c_adap_template = { 217 .name = "cx18 i2c driver", 218 .algo = NULL, /* set by i2c-algo-bit */ 219 .algo_data = NULL, /* filled from template */ 220 .owner = THIS_MODULE, 221}; 222 223#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ 224#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ 225 226static struct i2c_algo_bit_data cx18_i2c_algo_template = { 227 .setsda = cx18_setsda, 228 .setscl = cx18_setscl, 229 .getsda = cx18_getsda, 230 .getscl = cx18_getscl, 231 .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ 232 .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ 233}; 234 235/* init + register i2c adapter */ 236int init_cx18_i2c(struct cx18 *cx) 237{ 238 int i, err; 239 CX18_DEBUG_I2C("i2c init\n"); 240 241 for (i = 0; i < 2; i++) { 242 /* Setup algorithm for adapter */ 243 memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template, 244 sizeof(struct i2c_algo_bit_data)); 245 cx->i2c_algo_cb_data[i].cx = cx; 246 cx->i2c_algo_cb_data[i].bus_index = i; 247 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; 248 249 /* Setup adapter */ 250 memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template, 251 sizeof(struct i2c_adapter)); 252 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; 253 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), 254 " #%d-%d", cx->instance, i); 255 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); 256 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; 257 } 258 259 if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { 260 /* Reset/Unreset I2C hardware block */ 261 /* Clock select 220MHz */ 262 cx18_write_reg_expect(cx, 0x10000000, 0xc71004, 263 0x00000000, 0x10001000); 264 /* Clock Enable */ 265 cx18_write_reg_expect(cx, 0x10001000, 0xc71024, 266 0x00001000, 0x10001000); 267 } 268 /* courtesy of Steven Toth <stoth@hauppauge.com> */ 269 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 270 mdelay(10); 271 cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); 272 mdelay(10); 273 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 274 mdelay(10); 275 276 /* Set to edge-triggered intrs. */ 277 cx18_write_reg(cx, 0x00c00000, 0xc730c8); 278 /* Clear any stale intrs */ 279 cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, 280 ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); 281 282 /* Hw I2C1 Clock Freq ~100kHz */ 283 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); 284 cx18_setscl(&cx->i2c_algo_cb_data[0], 1); 285 cx18_setsda(&cx->i2c_algo_cb_data[0], 1); 286 287 /* Hw I2C2 Clock Freq ~100kHz */ 288 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); 289 cx18_setscl(&cx->i2c_algo_cb_data[1], 1); 290 cx18_setsda(&cx->i2c_algo_cb_data[1], 1); 291 292 cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, 293 core, reset, (u32) CX18_GPIO_RESET_I2C); 294 295 err = i2c_bit_add_bus(&cx->i2c_adap[0]); 296 if (err) 297 goto err; 298 err = i2c_bit_add_bus(&cx->i2c_adap[1]); 299 if (err) 300 goto err_del_bus_0; 301 return 0; 302 303 err_del_bus_0: 304 i2c_del_adapter(&cx->i2c_adap[0]); 305 err: 306 return err; 307} 308 309void exit_cx18_i2c(struct cx18 *cx) 310{ 311 int i; 312 CX18_DEBUG_I2C("i2c exit\n"); 313 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, 314 CX18_REG_I2C_1_WR); 315 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, 316 CX18_REG_I2C_2_WR); 317 318 for (i = 0; i < 2; i++) { 319 i2c_del_adapter(&cx->i2c_adap[i]); 320 } 321} 322 323/* 324 Hauppauge HVR1600 should have: 325 32 cx24227 326 98 unknown 327 a0 eeprom 328 c2 tuner 329 e? zilog ir 330 */ 331