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
 28static struct tda1002x_config vp2040_tda1002x_cu1216_config = {
 29	.demod_address	= 0x18 >> 1,
 30	.invert		= 1,
 31};
 32
 33static struct tda10023_config vp2040_tda10023_cu1216_config = {
 34	.demod_address	= 0x18 >> 1,
 35	.invert		= 1,
 36};
 37
 38static 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
 94static 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
112static 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
163struct 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};