drivers/media/pci/mantis/mantis_vp2040.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3         Mantis VP-2040 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_vp2040.h"
  24
  25 #define MANTIS_MODEL_NAME       "VP-2040"
  26 #define MANTIS_DEV_TYPE         "DVB-C"
  27
  28 static struct tda1002x_config vp2040_tda1002x_cu1216_config = {
  29         .demod_address  = 0x18 >> 1,
  30         .invert         = 1,
  31 };
  32
  33 static struct tda10023_config vp2040_tda10023_cu1216_config = {
  34         .demod_address  = 0x18 >> 1,
  35         .invert         = 1,
  36 };
  37
  38 static int tda1002x_cu1216_tuner_set(struct dvb_frontend *fe)
  39 {
  40         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  41         struct mantis_pci *mantis       = fe->dvb->priv;
  42         struct i2c_adapter *adapter     = &mantis->adapter;
  43
  44         u8 buf[6];
  45         struct i2c_msg msg = {.addr = 0x60, .flags = 0, .buf = buf, .len = sizeof(buf)};
  46         int i;
  47
  48 #define CU1216_IF 36125000
  49 #define TUNER_MUL 62500
  50
  51         u32 div = (p->frequency + CU1216_IF + TUNER_MUL / 2) / TUNER_MUL;
  52
  53         buf[0] = (div >> 8) & 0x7f;
  54         buf[1] = div & 0xff;
  55         buf[2] = 0xce;
  56         buf[3] = (p->frequency < 150000000 ? 0x01 :
  57                   p->frequency < 445000000 ? 0x02 : 0x04);
  58         buf[4] = 0xde;
  59         buf[5] = 0x20;
  60
  61         if (fe->ops.i2c_gate_ctrl)
  62                 fe->ops.i2c_gate_ctrl(fe, 1);
  63
  64         if (i2c_transfer(adapter, &msg, 1) != 1)
  65                 return -EIO;
  66
  67         /* wait for the pll lock */
  68         msg.flags = I2C_M_RD;
  69         msg.len = 1;
  70         for (i = 0; i < 20; i++) {
  71                 if (fe->ops.i2c_gate_ctrl)
  72                         fe->ops.i2c_gate_ctrl(fe, 1);
  73
  74                 if (i2c_transfer(adapter, &msg, 1) == 1 && (buf[0] & 0x40))
  75                         break;
  76
  77                 msleep(10);
  78         }
  79
  80         /* switch the charge pump to the lower current */
  81         msg.flags = 0;
  82         msg.len = 2;
  83         msg.buf = &buf[2];
  84         buf[2] &= ~0x40;
  85         if (fe->ops.i2c_gate_ctrl)
  86                 fe->ops.i2c_gate_ctrl(fe, 1);
  87
  88         if (i2c_transfer(adapter, &msg, 1) != 1)
  89                 return -EIO;
  90
  91         return 0;
  92 }
  93
  94 static u8 read_pwm(struct mantis_pci *mantis)
  95 {
  96         struct i2c_adapter *adapter = &mantis->adapter;
  97
  98         u8 b = 0xff;
  99         u8 pwm;
 100         struct i2c_msg msg[] = {
 101                 {.addr = 0x50, .flags = 0, .buf = &b, .len = 1},
 102                 {.addr = 0x50, .flags = I2C_M_RD, .buf = &pwm, .len = 1}
 103         };
 104
 105         if ((i2c_transfer(adapter, msg, 2) != 2)
 106             || (pwm == 0xff))
 107                 pwm = 0x48;
 108
 109         return pwm;
 110 }
 111
 112 static int vp2040_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, &vp2040_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                                 vp2040_tda1002x_cu1216_config.demod_address);
 132                 } else {
 133                         fe = dvb_attach(tda10023_attach, &vp2040_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                                         vp2040_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         mantis->fe = fe;
 158         dprintk(MANTIS_DEBUG, 1, "Done!");
 159
 160         return 0;
 161 }
 162
 163 struct mantis_hwconfig vp2040_config = {
 164         .model_name     = MANTIS_MODEL_NAME,
 165         .dev_type       = MANTIS_DEV_TYPE,
 166         .ts_size        = MANTIS_TS_204,
 167
 168         .baud_rate      = MANTIS_BAUD_9600,
 169         .parity         = MANTIS_PARITY_NONE,
 170         .bytes          = 0,
 171
 172         .frontend_init  = vp2040_frontend_init,
 173         .power          = GPIF_A12,
 174         .reset          = GPIF_A13,
 175 };