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
40static struct tda1002x_config vp2040_tda1002x_cu1216_config = {
41	.demod_address	= 0x18 >> 1,
42	.invert		= 1,
43};
44
45static struct tda10023_config vp2040_tda10023_cu1216_config = {
46	.demod_address	= 0x18 >> 1,
47	.invert		= 1,
48};
49
50static 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
106static 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
124static 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
175struct 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};
188