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)
  51 {
  52         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  53         struct mantis_pci *mantis       = fe->dvb->priv;
  54         struct i2c_adapter *adapter     = &mantis->adapter;
  55
  56         u8 buf[6];
  57         struct i2c_msg msg = {.addr = 0x60, .flags = 0, .buf = buf, .len = sizeof(buf)};
  58         int i;
  59
  60 #define CU1216_IF 36125000
  61 #define TUNER_MUL 62500
  62
  63         u32 div = (p->frequency + CU1216_IF + TUNER_MUL / 2) / TUNER_MUL;
  64
  65         buf[0] = (div >> 8) & 0x7f;
  66         buf[1] = div & 0xff;
  67         buf[2] = 0xce;
  68         buf[3] = (p->frequency < 150000000 ? 0x01 :
  69                   p->frequency < 445000000 ? 0x02 : 0x04);
  70         buf[4] = 0xde;
  71         buf[5] = 0x20;
  72
  73         if (fe->ops.i2c_gate_ctrl)
  74                 fe->ops.i2c_gate_ctrl(fe, 1);
  75
  76         if (i2c_transfer(adapter, &msg, 1) != 1)
  77                 return -EIO;
  78
  79         /* wait for the pll lock */
  80         msg.flags = I2C_M_RD;
  81         msg.len = 1;
  82         for (i = 0; i < 20; i++) {
  83                 if (fe->ops.i2c_gate_ctrl)
  84                         fe->ops.i2c_gate_ctrl(fe, 1);
  85
  86                 if (i2c_transfer(adapter, &msg, 1) == 1 && (buf[0] & 0x40))
  87                         break;
  88
  89                 msleep(10);
  90         }
  91
  92         /* switch the charge pump to the lower current */
  93         msg.flags = 0;
  94         msg.len = 2;
  95         msg.buf = &buf[2];
  96         buf[2] &= ~0x40;
  97         if (fe->ops.i2c_gate_ctrl)
  98                 fe->ops.i2c_gate_ctrl(fe, 1);
  99
 100         if (i2c_transfer(adapter, &msg, 1) != 1)
 101                 return -EIO;
 102
 103         return 0;
 104 }
 105
 106 static u8 read_pwm(struct mantis_pci *mantis)
 107 {
 108         struct i2c_adapter *adapter = &mantis->adapter;
 109
 110         u8 b = 0xff;
 111         u8 pwm;
 112         struct i2c_msg msg[] = {
 113                 {.addr = 0x50, .flags = 0, .buf = &b, .len = 1},
 114                 {.addr = 0x50, .flags = I2C_M_RD, .buf = &pwm, .len = 1}
 115         };
 116
 117         if ((i2c_transfer(adapter, msg, 2) != 2)
 118             || (pwm == 0xff))
 119                 pwm = 0x48;
 120
 121         return pwm;
 122 }
 123
 124 static int vp2040_frontend_init(struct mantis_pci *mantis, struct dvb_frontend *fe)
 125 {
 126         struct i2c_adapter *adapter = &mantis->adapter;
 127
 128         int err = 0;
 129
 130         err = mantis_frontend_power(mantis, POWER_ON);
 131         if (err == 0) {
 132                 mantis_frontend_soft_reset(mantis);
 133                 msleep(250);
 134
 135                 dprintk(MANTIS_ERROR, 1, "Probing for CU1216 (DVB-C)");
 136                 fe = dvb_attach(tda10021_attach, &vp2040_tda1002x_cu1216_config,
 137                                      adapter,
 138                                      read_pwm(mantis));
 139
 140                 if (fe) {
 141                         dprintk(MANTIS_ERROR, 1,
 142                                 "found Philips CU1216 DVB-C frontend (TDA10021) @ 0x%02x",
 143                                 vp2040_tda1002x_cu1216_config.demod_address);
 144                 } else {
 145                         fe = dvb_attach(tda10023_attach, &vp2040_tda10023_cu1216_config,
 146                                              adapter,
 147                                              read_pwm(mantis));
 148
 149                         if (fe) {
 150                                 dprintk(MANTIS_ERROR, 1,
 151                                         "found Philips CU1216 DVB-C frontend (TDA10023) @ 0x%02x",
 152                                         vp2040_tda1002x_cu1216_config.demod_address);
 153                         }
 154                 }
 155
 156                 if (fe) {
 157                         fe->ops.tuner_ops.set_params = tda1002x_cu1216_tuner_set;
 158                         dprintk(MANTIS_ERROR, 1, "Mantis DVB-C Philips CU1216 frontend attach success");
 159                 } else {
 160                         return -1;
 161                 }
 162         } else {
 163                 dprintk(MANTIS_ERROR, 1, "Frontend on <%s> POWER ON failed! <%d>",
 164                         adapter->name,
 165                         err);
 166
 167                 return -EIO;
 168         }
 169         mantis->fe = fe;
 170         dprintk(MANTIS_DEBUG, 1, "Done!");
 171
 172         return 0;
 173 }
 174
 175 struct mantis_hwconfig vp2040_config = {
 176         .model_name     = MANTIS_MODEL_NAME,
 177         .dev_type       = MANTIS_DEV_TYPE,
 178         .ts_size        = MANTIS_TS_204,
 179
 180         .baud_rate      = MANTIS_BAUD_9600,
 181         .parity         = MANTIS_PARITY_NONE,
 182         .bytes          = 0,
 183
 184         .frontend_init  = vp2040_frontend_init,
 185         .power          = GPIF_A12,
 186         .reset          = GPIF_A13,
 187 };