drivers/media/video/cx18/cx18-i2c.c

   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@radix.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_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 */
  87 static 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
  99 static 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 ? -1 : 0;
 121 }
 122
 123 int cx18_i2c_register(struct cx18 *cx, unsigned idx)
 124 {
 125         struct v4l2_subdev *sd;
 126         int bus = hw_bus[idx];
 127         struct i2c_adapter *adap = &cx->i2c_adap[bus];
 128         const char *mod = hw_modules[idx];
 129         const char *type = hw_devicenames[idx];
 130         u32 hw = 1 << idx;
 131
 132         if (idx >= ARRAY_SIZE(hw_addrs))
 133                 return -1;
 134
 135         if (hw == CX18_HW_TUNER) {
 136                 /* special tuner group handling */
 137                 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,
 138                                 adap, mod, type, 0, cx->card_i2c->radio);
 139                 if (sd != NULL)
 140                         sd->grp_id = hw;
 141                 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,
 142                                 adap, mod, type, 0, cx->card_i2c->demod);
 143                 if (sd != NULL)
 144                         sd->grp_id = hw;
 145                 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,
 146                                 adap, mod, type, 0, cx->card_i2c->tv);
 147                 if (sd != NULL)
 148                         sd->grp_id = hw;
 149                 return sd != NULL ? 0 : -1;
 150         }
 151
 152         if (hw & CX18_HW_IR_ANY)
 153                 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]);
 154
 155         /* Is it not an I2C device or one we do not wish to register? */
 156         if (!hw_addrs[idx])
 157                 return -1;
 158
 159         /* It's an I2C device other than an analog tuner or IR chip */
 160         sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, mod, type, hw_addrs[idx], NULL);
 161         if (sd != NULL)
 162                 sd->grp_id = hw;
 163         return sd != NULL ? 0 : -1;
 164 }
 165
 166 /* Find the first member of the subdev group id in hw */
 167 struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw)
 168 {
 169         struct v4l2_subdev *result = NULL;
 170         struct v4l2_subdev *sd;
 171
 172         spin_lock(&cx->v4l2_dev.lock);
 173         v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) {
 174                 if (sd->grp_id == hw) {
 175                         result = sd;
 176                         break;
 177                 }
 178         }
 179         spin_unlock(&cx->v4l2_dev.lock);
 180         return result;
 181 }
 182
 183 static void cx18_setscl(void *data, int state)
 184 {
 185         struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
 186         int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
 187         u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;
 188         u32 r = cx18_read_reg(cx, addr);
 189
 190         if (state)
 191                 cx18_write_reg(cx, r | SETSCL_BIT, addr);
 192         else
 193                 cx18_write_reg(cx, r & ~SETSCL_BIT, addr);
 194 }
 195
 196 static void cx18_setsda(void *data, int state)
 197 {
 198         struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
 199         int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
 200         u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;
 201         u32 r = cx18_read_reg(cx, addr);
 202
 203         if (state)
 204                 cx18_write_reg(cx, r | SETSDL_BIT, addr);
 205         else
 206                 cx18_write_reg(cx, r & ~SETSDL_BIT, addr);
 207 }
 208
 209 static int cx18_getscl(void *data)
 210 {
 211         struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
 212         int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
 213         u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;
 214
 215         return cx18_read_reg(cx, addr) & GETSCL_BIT;
 216 }
 217
 218 static int cx18_getsda(void *data)
 219 {
 220         struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;
 221         int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;
 222         u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;
 223
 224         return cx18_read_reg(cx, addr) & GETSDL_BIT;
 225 }
 226
 227 /* template for i2c-bit-algo */
 228 static struct i2c_adapter cx18_i2c_adap_template = {
 229         .name = "cx18 i2c driver",
 230         .algo = NULL,                   /* set by i2c-algo-bit */
 231         .algo_data = NULL,              /* filled from template */
 232         .owner = THIS_MODULE,
 233 };
 234
 235 #define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */
 236 #define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */
 237
 238 static struct i2c_algo_bit_data cx18_i2c_algo_template = {
 239         .setsda         = cx18_setsda,
 240         .setscl         = cx18_setscl,
 241         .getsda         = cx18_getsda,
 242         .getscl         = cx18_getscl,
 243         .udelay         = CX18_SCL_PERIOD/2,       /* 1/2 clock period in usec*/
 244         .timeout        = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */
 245 };
 246
 247 /* init + register i2c algo-bit adapter */
 248 int init_cx18_i2c(struct cx18 *cx)
 249 {
 250         int i, err;
 251         CX18_DEBUG_I2C("i2c init\n");
 252
 253         for (i = 0; i < 2; i++) {
 254                 /* Setup algorithm for adapter */
 255                 memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template,
 256                         sizeof(struct i2c_algo_bit_data));
 257                 cx->i2c_algo_cb_data[i].cx = cx;
 258                 cx->i2c_algo_cb_data[i].bus_index = i;
 259                 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i];
 260
 261                 /* Setup adapter */
 262                 memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template,
 263                         sizeof(struct i2c_adapter));
 264                 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i];
 265                 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name),
 266                                 " #%d-%d", cx->instance, i);
 267                 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev);
 268                 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev;
 269         }
 270
 271         if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) {
 272                 /* Reset/Unreset I2C hardware block */
 273                 /* Clock select 220MHz */
 274                 cx18_write_reg_expect(cx, 0x10000000, 0xc71004,
 275                                           0x00000000, 0x10001000);
 276                 /* Clock Enable */
 277                 cx18_write_reg_expect(cx, 0x10001000, 0xc71024,
 278                                           0x00001000, 0x10001000);
 279         }
 280         /* courtesy of Steven Toth <stoth@hauppauge.com> */
 281         cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);
 282         mdelay(10);
 283         cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0);
 284         mdelay(10);
 285         cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);
 286         mdelay(10);
 287
 288         /* Set to edge-triggered intrs. */
 289         cx18_write_reg(cx, 0x00c00000, 0xc730c8);
 290         /* Clear any stale intrs */
 291         cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS,
 292                        ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT);
 293
 294         /* Hw I2C1 Clock Freq ~100kHz */
 295         cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR);
 296         cx18_setscl(&cx->i2c_algo_cb_data[0], 1);
 297         cx18_setsda(&cx->i2c_algo_cb_data[0], 1);
 298
 299         /* Hw I2C2 Clock Freq ~100kHz */
 300         cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR);
 301         cx18_setscl(&cx->i2c_algo_cb_data[1], 1);
 302         cx18_setsda(&cx->i2c_algo_cb_data[1], 1);
 303
 304         cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL,
 305                      core, reset, (u32) CX18_GPIO_RESET_I2C);
 306
 307         err = i2c_bit_add_bus(&cx->i2c_adap[0]);
 308         if (err)
 309                 goto err;
 310         err = i2c_bit_add_bus(&cx->i2c_adap[1]);
 311         if (err)
 312                 goto err_del_bus_0;
 313         return 0;
 314
 315  err_del_bus_0:
 316         i2c_del_adapter(&cx->i2c_adap[0]);
 317  err:
 318         return err;
 319 }
 320
 321 void exit_cx18_i2c(struct cx18 *cx)
 322 {
 323         int i;
 324         CX18_DEBUG_I2C("i2c exit\n");
 325         cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4,
 326                                                         CX18_REG_I2C_1_WR);
 327         cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4,
 328                                                         CX18_REG_I2C_2_WR);
 329
 330         for (i = 0; i < 2; i++) {
 331                 i2c_del_adapter(&cx->i2c_adap[i]);
 332         }
 333 }
 334
 335 /*
 336    Hauppauge HVR1600 should have:
 337    32 cx24227
 338    98 unknown
 339    a0 eeprom
 340    c2 tuner
 341    e? zilog ir
 342    */