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 */ 47 static 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 */ 61 static 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 */ 74 static 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 86 static 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_BIT_RC5 | RC_BIT_RC6_MCE | 102 RC_BIT_RC6_6A_32; 103 init_data->name = cx->card_name; 104 info.platform_data = init_data; 105 break; 106 } 107 108 return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? 109 -1 : 0; 110 } 111 112 int cx18_i2c_register(struct cx18 *cx, unsigned idx) 113 { 114 struct v4l2_subdev *sd; 115 int bus = hw_bus[idx]; 116 struct i2c_adapter *adap = &cx->i2c_adap[bus]; 117 const char *type = hw_devicenames[idx]; 118 u32 hw = 1 << idx; 119 120 if (hw == CX18_HW_TUNER) { 121 /* special tuner group handling */ 122 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 123 adap, type, 0, cx->card_i2c->radio); 124 if (sd != NULL) 125 sd->grp_id = hw; 126 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 127 adap, type, 0, cx->card_i2c->demod); 128 if (sd != NULL) 129 sd->grp_id = hw; 130 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, 131 adap, type, 0, cx->card_i2c->tv); 132 if (sd != NULL) 133 sd->grp_id = hw; 134 return sd != NULL ? 0 : -1; 135 } 136 137 if (hw & CX18_HW_IR_ANY) 138 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); 139 140 /* Is it not an I2C device or one we do not wish to register? */ 141 if (!hw_addrs[idx]) 142 return -1; 143 144 /* It's an I2C device other than an analog tuner or IR chip */ 145 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx], 146 NULL); 147 if (sd != NULL) 148 sd->grp_id = hw; 149 return sd != NULL ? 0 : -1; 150 } 151 152 /* Find the first member of the subdev group id in hw */ 153 struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) 154 { 155 struct v4l2_subdev *result = NULL; 156 struct v4l2_subdev *sd; 157 158 spin_lock(&cx->v4l2_dev.lock); 159 v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { 160 if (sd->grp_id == hw) { 161 result = sd; 162 break; 163 } 164 } 165 spin_unlock(&cx->v4l2_dev.lock); 166 return result; 167 } 168 169 static void cx18_setscl(void *data, int state) 170 { 171 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 172 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 173 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 174 u32 r = cx18_read_reg(cx, addr); 175 176 if (state) 177 cx18_write_reg(cx, r | SETSCL_BIT, addr); 178 else 179 cx18_write_reg(cx, r & ~SETSCL_BIT, addr); 180 } 181 182 static void cx18_setsda(void *data, int state) 183 { 184 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 185 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 186 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; 187 u32 r = cx18_read_reg(cx, addr); 188 189 if (state) 190 cx18_write_reg(cx, r | SETSDL_BIT, addr); 191 else 192 cx18_write_reg(cx, r & ~SETSDL_BIT, addr); 193 } 194 195 static int cx18_getscl(void *data) 196 { 197 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 198 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 199 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 200 201 return cx18_read_reg(cx, addr) & GETSCL_BIT; 202 } 203 204 static int cx18_getsda(void *data) 205 { 206 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; 207 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; 208 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; 209 210 return cx18_read_reg(cx, addr) & GETSDL_BIT; 211 } 212 213 /* template for i2c-bit-algo */ 214 static struct i2c_adapter cx18_i2c_adap_template = { 215 .name = "cx18 i2c driver", 216 .algo = NULL, /* set by i2c-algo-bit */ 217 .algo_data = NULL, /* filled from template */ 218 .owner = THIS_MODULE, 219 }; 220 221 #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ 222 #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ 223 224 static struct i2c_algo_bit_data cx18_i2c_algo_template = { 225 .setsda = cx18_setsda, 226 .setscl = cx18_setscl, 227 .getsda = cx18_getsda, 228 .getscl = cx18_getscl, 229 .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ 230 .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ 231 }; 232 233 /* init + register i2c adapter */ 234 int init_cx18_i2c(struct cx18 *cx) 235 { 236 int i, err; 237 CX18_DEBUG_I2C("i2c init\n"); 238 239 for (i = 0; i < 2; i++) { 240 /* Setup algorithm for adapter */ 241 cx->i2c_algo[i] = cx18_i2c_algo_template; 242 cx->i2c_algo_cb_data[i].cx = cx; 243 cx->i2c_algo_cb_data[i].bus_index = i; 244 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; 245 246 /* Setup adapter */ 247 cx->i2c_adap[i] = cx18_i2c_adap_template; 248 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; 249 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), 250 " #%d-%d", cx->instance, i); 251 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); 252 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; 253 } 254 255 if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { 256 /* Reset/Unreset I2C hardware block */ 257 /* Clock select 220MHz */ 258 cx18_write_reg_expect(cx, 0x10000000, 0xc71004, 259 0x00000000, 0x10001000); 260 /* Clock Enable */ 261 cx18_write_reg_expect(cx, 0x10001000, 0xc71024, 262 0x00001000, 0x10001000); 263 } 264 /* courtesy of Steven Toth <stoth@hauppauge.com> */ 265 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 266 mdelay(10); 267 cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); 268 mdelay(10); 269 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); 270 mdelay(10); 271 272 /* Set to edge-triggered intrs. */ 273 cx18_write_reg(cx, 0x00c00000, 0xc730c8); 274 /* Clear any stale intrs */ 275 cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, 276 ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); 277 278 /* Hw I2C1 Clock Freq ~100kHz */ 279 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); 280 cx18_setscl(&cx->i2c_algo_cb_data[0], 1); 281 cx18_setsda(&cx->i2c_algo_cb_data[0], 1); 282 283 /* Hw I2C2 Clock Freq ~100kHz */ 284 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); 285 cx18_setscl(&cx->i2c_algo_cb_data[1], 1); 286 cx18_setsda(&cx->i2c_algo_cb_data[1], 1); 287 288 cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, 289 core, reset, (u32) CX18_GPIO_RESET_I2C); 290 291 err = i2c_bit_add_bus(&cx->i2c_adap[0]); 292 if (err) 293 goto err; 294 err = i2c_bit_add_bus(&cx->i2c_adap[1]); 295 if (err) 296 goto err_del_bus_0; 297 return 0; 298 299 err_del_bus_0: 300 i2c_del_adapter(&cx->i2c_adap[0]); 301 err: 302 return err; 303 } 304 305 void exit_cx18_i2c(struct cx18 *cx) 306 { 307 int i; 308 CX18_DEBUG_I2C("i2c exit\n"); 309 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, 310 CX18_REG_I2C_1_WR); 311 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, 312 CX18_REG_I2C_2_WR); 313 314 for (i = 0; i < 2; i++) { 315 i2c_del_adapter(&cx->i2c_adap[i]); 316 } 317 } 318 319 /* 320 Hauppauge HVR1600 should have: 321 32 cx24227 322 98 unknown 323 a0 eeprom 324 c2 tuner 325 e? zilog ir 326 */ 327