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 static struct tda1002x_config vp2040_tda1002x_cu1216_config = {
41 	.demod_address	= 0x18 >> 1,
42 	.invert		= 1,
43 };
44 
45 static 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 };
188