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