drivers/media/dvb/mantis/mantis_vp2040.c

   1 /*
   2         Mantis VP-2040 driver
   3
   4         Copyright (C) Manu Abraham (abraham.manu@gmail.com)
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14         GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public License
  17         along with this program; if not, write to the Free Software
  18         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include <linux/signal.h>
  22 #include <linux/sched.h>
  23 #include <linux/interrupt.h>
  24
  25 #include "dmxdev.h"
  26 #include "dvbdev.h"
  27 #include "dvb_demux.h"
  28 #include "dvb_frontend.h"
  29 #include "dvb_net.h"
  30
  31 #include "tda1002x.h"
  32 #include "mantis_common.h"
  33 #include "mantis_ioc.h"
  34 #include "mantis_dvb.h"
  35 #include "mantis_vp2040.h"
  36
  37 #define MANTIS_MODEL_NAME       "VP-2040"
  38 #define MANTIS_DEV_TYPE         "DVB-C"
  39
  40 struct tda1002x_config vp2040_tda1002x_cu1216_config = {
  41         .demod_address  = 0x18 >> 1,
  42         .invert         = 1,
  43 };
  44
  45 struct tda10023_config vp2040_tda10023_cu1216_config = {
  46         .demod_address  = 0x18 >> 1,
  47         .invert         = 1,
  48 };
  49
  50 static int tda1002x_cu1216_tuner_set(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
  51 {
  52         struct mantis_pci *mantis       = fe->dvb->priv;
  53         struct i2c_adapter *adapter     = &mantis->adapter;
  54
  55         u8 buf[6];
  56         struct i2c_msg msg = {.addr = 0x60, .flags = 0, .buf = buf, .len = sizeof(buf)};
  57         int i;
  58
  59 #define CU1216_IF 36125000
  60 #define TUNER_MUL 62500
  61
  62         u32 div = (params->frequency + CU1216_IF + TUNER_MUL / 2) / TUNER_MUL;
  63
  64         buf[0] = (div >> 8) & 0x7f;
  65         buf[1] = div & 0xff;
  66         buf[2] = 0xce;
  67         buf[3] = (params->frequency < 150000000 ? 0x01 :
  68                   params->frequency < 445000000 ? 0x02 : 0x04);
  69         buf[4] = 0xde;
  70         buf[5] = 0x20;
  71
  72         if (fe->ops.i2c_gate_ctrl)
  73                 fe->ops.i2c_gate_ctrl(fe, 1);
  74
  75         if (i2c_transfer(adapter, &msg, 1) != 1)
  76                 return -EIO;
  77
  78         /* wait for the pll lock */
  79         msg.flags = I2C_M_RD;
  80         msg.len = 1;
  81         for (i = 0; i < 20; i++) {
  82                 if (fe->ops.i2c_gate_ctrl)
  83                         fe->ops.i2c_gate_ctrl(fe, 1);
  84
  85                 if (i2c_transfer(adapter, &msg, 1) == 1 && (buf[0] & 0x40))
  86                         break;
  87
  88                 msleep(10);
  89         }
  90
  91         /* switch the charge pump to the lower current */
  92         msg.flags = 0;
  93         msg.len = 2;
  94         msg.buf = &buf[2];
  95         buf[2] &= ~0x40;
  96         if (fe->ops.i2c_gate_ctrl)
  97                 fe->ops.i2c_gate_ctrl(fe, 1);
  98
  99         if (i2c_transfer(adapter, &msg, 1) != 1)
 100                 return -EIO;
 101
 102         return 0;
 103 }
 104
 105 static u8 read_pwm(struct mantis_pci *mantis)
 106 {
 107         struct i2c_adapter *adapter = &mantis->adapter;
 108
 109         u8 b = 0xff;
 110         u8 pwm;
 111         struct i2c_msg msg[] = {
 112                 {.addr = 0x50, .flags = 0, .buf = &b, .len = 1},
 113                 {.addr = 0x50, .flags = I2C_M_RD, .buf = &pwm, .len = 1}
 114         };
 115
 116         if ((i2c_transfer(adapter, msg, 2) != 2)
 117             || (pwm == 0xff))
 118                 pwm = 0x48;
 119
 120         return pwm;
 121 }
 122
 123 static int vp2040_frontend_init(struct mantis_pci *mantis, struct dvb_frontend *fe)
 124 {
 125         struct i2c_adapter *adapter = &mantis->adapter;
 126
 127         int err = 0;
 128
 129         err = mantis_frontend_power(mantis, POWER_ON);
 130         if (err == 0) {
 131                 mantis_frontend_soft_reset(mantis);
 132                 msleep(250);
 133
 134                 dprintk(MANTIS_ERROR, 1, "Probing for CU1216 (DVB-C)");
 135                 fe = tda10021_attach(&vp2040_tda1002x_cu1216_config,
 136                                      adapter,
 137                                      read_pwm(mantis));
 138
 139                 if (fe) {
 140                         dprintk(MANTIS_ERROR, 1,
 141                                 "found Philips CU1216 DVB-C frontend (TDA10021) @ 0x%02x",
 142                                 vp2040_tda1002x_cu1216_config.demod_address);
 143                 } else {
 144                         fe = tda10023_attach(&vp2040_tda10023_cu1216_config,
 145                                              adapter,
 146                                              read_pwm(mantis));
 147
 148                         if (fe) {
 149                                 dprintk(MANTIS_ERROR, 1,
 150                                         "found Philips CU1216 DVB-C frontend (TDA10023) @ 0x%02x",
 151                                         vp2040_tda1002x_cu1216_config.demod_address);
 152                         }
 153                 }
 154
 155                 if (fe) {
 156                         fe->ops.tuner_ops.set_params = tda1002x_cu1216_tuner_set;
 157                         dprintk(MANTIS_ERROR, 1, "Mantis DVB-C Philips CU1216 frontend attach success");
 158                 } else {
 159                         return -1;
 160                 }
 161         } else {
 162                 dprintk(MANTIS_ERROR, 1, "Frontend on <%s> POWER ON failed! <%d>",
 163                         adapter->name,
 164                         err);
 165
 166                 return -EIO;
 167         }
 168         mantis->fe = fe;
 169         dprintk(MANTIS_DEBUG, 1, "Done!");
 170
 171         return 0;
 172 }
 173
 174 struct mantis_hwconfig vp2040_config = {
 175         .model_name     = MANTIS_MODEL_NAME,
 176         .dev_type       = MANTIS_DEV_TYPE,
 177         .ts_size        = MANTIS_TS_204,
 178
 179         .baud_rate      = MANTIS_BAUD_9600,
 180         .parity         = MANTIS_PARITY_NONE,
 181         .bytes          = 0,
 182
 183         .frontend_init  = vp2040_frontend_init,
 184         .power          = GPIF_A12,
 185         .reset          = GPIF_A13,
 186 };