drivers/media/pci/mantis/mantis_vp2033.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3         Mantis VP-2033 driver
   4
   5         Copyright (C) Manu Abraham (abraham.manu@gmail.com)
   6
   7 */
   8
   9 #include <linux/signal.h>
  10 #include <linux/sched.h>
  11 #include <linux/interrupt.h>
  12
  13 #include <media/dmxdev.h>
  14 #include <media/dvbdev.h>
  15 #include <media/dvb_demux.h>
  16 #include <media/dvb_frontend.h>
  17 #include <media/dvb_net.h>
  18
  19 #include "tda1002x.h"
  20 #include "mantis_common.h"
  21 #include "mantis_ioc.h"
  22 #include "mantis_dvb.h"
  23 #include "mantis_vp2033.h"
  24
  25 #define MANTIS_MODEL_NAME       "VP-2033"
  26 #define MANTIS_DEV_TYPE         "DVB-C"
  27
  28 static struct tda1002x_config vp2033_tda1002x_cu1216_config = {
  29         .demod_address = 0x18 >> 1,
  30         .invert = 1,
  31 };
  32
  33 static struct tda10023_config vp2033_tda10023_cu1216_config = {
  34         .demod_address = 0x18 >> 1,
  35         .invert = 1,
  36 };
  37
  38 static u8 read_pwm(struct mantis_pci *mantis)
  39 {
  40         struct i2c_adapter *adapter = &mantis->adapter;
  41
  42         u8 b = 0xff;
  43         u8 pwm;
  44         struct i2c_msg msg[] = {
  45                 {.addr = 0x50, .flags = 0, .buf = &b, .len = 1},
  46                 {.addr = 0x50, .flags = I2C_M_RD, .buf = &pwm, .len = 1}
  47         };
  48
  49         if ((i2c_transfer(adapter, msg, 2) != 2)
  50             || (pwm == 0xff))
  51                 pwm = 0x48;
  52
  53         return pwm;
  54 }
  55
  56 static int tda1002x_cu1216_tuner_set(struct dvb_frontend *fe)
  57 {
  58         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  59         struct mantis_pci *mantis = fe->dvb->priv;
  60         struct i2c_adapter *adapter = &mantis->adapter;
  61
  62         u8 buf[6];
  63         struct i2c_msg msg = {.addr = 0x60, .flags = 0, .buf = buf, .len = sizeof(buf)};
  64         int i;
  65
  66 #define CU1216_IF 36125000
  67 #define TUNER_MUL 62500
  68
  69         u32 div = (p->frequency + CU1216_IF + TUNER_MUL / 2) / TUNER_MUL;
  70
  71         buf[0] = (div >> 8) & 0x7f;
  72         buf[1] = div & 0xff;
  73         buf[2] = 0xce;
  74         buf[3] = (p->frequency < 150000000 ? 0x01 :
  75                   p->frequency < 445000000 ? 0x02 : 0x04);
  76         buf[4] = 0xde;
  77         buf[5] = 0x20;
  78
  79         if (fe->ops.i2c_gate_ctrl)
  80                 fe->ops.i2c_gate_ctrl(fe, 1);
  81
  82         if (i2c_transfer(adapter, &msg, 1) != 1)
  83                 return -EIO;
  84
  85         /* wait for the pll lock */
  86         msg.flags = I2C_M_RD;
  87         msg.len = 1;
  88         for (i = 0; i < 20; i++) {
  89                 if (fe->ops.i2c_gate_ctrl)
  90                         fe->ops.i2c_gate_ctrl(fe, 1);
  91
  92                 if (i2c_transfer(adapter, &msg, 1) == 1 && (buf[0] & 0x40))
  93                         break;
  94
  95                 msleep(10);
  96         }
  97
  98         /* switch the charge pump to the lower current */
  99         msg.flags = 0;
 100         msg.len = 2;
 101         msg.buf = &buf[2];
 102         buf[2] &= ~0x40;
 103         if (fe->ops.i2c_gate_ctrl)
 104                 fe->ops.i2c_gate_ctrl(fe, 1);
 105
 106         if (i2c_transfer(adapter, &msg, 1) != 1)
 107                 return -EIO;
 108
 109         return 0;
 110 }
 111
 112 static int vp2033_frontend_init(struct mantis_pci *mantis, struct dvb_frontend *fe)
 113 {
 114         struct i2c_adapter *adapter = &mantis->adapter;
 115
 116         int err = 0;
 117
 118         err = mantis_frontend_power(mantis, POWER_ON);
 119         if (err == 0) {
 120                 mantis_frontend_soft_reset(mantis);
 121                 msleep(250);
 122
 123                 dprintk(MANTIS_ERROR, 1, "Probing for CU1216 (DVB-C)");
 124                 fe = dvb_attach(tda10021_attach, &vp2033_tda1002x_cu1216_config,
 125                                      adapter,
 126                                      read_pwm(mantis));
 127
 128                 if (fe) {
 129                         dprintk(MANTIS_ERROR, 1,
 130                                 "found Philips CU1216 DVB-C frontend (TDA10021) @ 0x%02x",
 131                                 vp2033_tda1002x_cu1216_config.demod_address);
 132                 } else {
 133                         fe = dvb_attach(tda10023_attach, &vp2033_tda10023_cu1216_config,
 134                                              adapter,
 135                                              read_pwm(mantis));
 136
 137                         if (fe) {
 138                                 dprintk(MANTIS_ERROR, 1,
 139                                         "found Philips CU1216 DVB-C frontend (TDA10023) @ 0x%02x",
 140                                         vp2033_tda1002x_cu1216_config.demod_address);
 141                         }
 142                 }
 143
 144                 if (fe) {
 145                         fe->ops.tuner_ops.set_params = tda1002x_cu1216_tuner_set;
 146                         dprintk(MANTIS_ERROR, 1, "Mantis DVB-C Philips CU1216 frontend attach success");
 147                 } else {
 148                         return -1;
 149                 }
 150         } else {
 151                 dprintk(MANTIS_ERROR, 1, "Frontend on <%s> POWER ON failed! <%d>",
 152                         adapter->name,
 153                         err);
 154
 155                 return -EIO;
 156         }
 157
 158         mantis->fe = fe;
 159         dprintk(MANTIS_DEBUG, 1, "Done!");
 160
 161         return 0;
 162 }
 163
 164 struct mantis_hwconfig vp2033_config = {
 165         .model_name     = MANTIS_MODEL_NAME,
 166         .dev_type       = MANTIS_DEV_TYPE,
 167         .ts_size        = MANTIS_TS_204,
 168
 169         .baud_rate      = MANTIS_BAUD_9600,
 170         .parity         = MANTIS_PARITY_NONE,
 171         .bytes          = 0,
 172
 173         .frontend_init  = vp2033_frontend_init,
 174         .power          = GPIF_A12,
 175         .reset          = GPIF_A13,
 176 };