Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6] / drivers / media / dvb / frontends / stb6000.c
1   /*
2      Driver for ST STB6000 DVBS Silicon tuner
3
4      Copyright (C) 2008 Igor M. Liplianin (liplianin@me.by)
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
15      GNU General Public License for more details.
16
17      You should have received a copy of the GNU General Public License
18      along with this program; if not, write to the Free Software
19      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21   */
22
23 #include <linux/module.h>
24 #include <linux/dvb/frontend.h>
25 #include <asm/types.h>
26
27 #include "stb6000.h"
28
29 static int debug;
30 #define dprintk(args...) \
31         do { \
32                 if (debug) \
33                         printk(KERN_DEBUG "stb6000: " args); \
34         } while (0)
35
36 struct stb6000_priv {
37         /* i2c details */
38         int i2c_address;
39         struct i2c_adapter *i2c;
40         u32 frequency;
41 };
42
43 static int stb6000_release(struct dvb_frontend *fe)
44 {
45         kfree(fe->tuner_priv);
46         fe->tuner_priv = NULL;
47         return 0;
48 }
49
50 static int stb6000_sleep(struct dvb_frontend *fe)
51 {
52         struct stb6000_priv *priv = fe->tuner_priv;
53         int ret;
54         u8 buf[] = { 10, 0 };
55         struct i2c_msg msg = {
56                 .addr = priv->i2c_address,
57                 .flags = 0,
58                 .buf = buf,
59                 .len = 2
60         };
61
62         dprintk("%s:\n", __func__);
63
64         if (fe->ops.i2c_gate_ctrl)
65                 fe->ops.i2c_gate_ctrl(fe, 1);
66
67         ret = i2c_transfer(priv->i2c, &msg, 1);
68         if (ret != 1)
69                 dprintk("%s: i2c error\n", __func__);
70
71         if (fe->ops.i2c_gate_ctrl)
72                 fe->ops.i2c_gate_ctrl(fe, 0);
73
74         return (ret == 1) ? 0 : ret;
75 }
76
77 static int stb6000_set_params(struct dvb_frontend *fe,
78                                 struct dvb_frontend_parameters *params)
79 {
80         struct stb6000_priv *priv = fe->tuner_priv;
81         unsigned int n, m;
82         int ret;
83         u32 freq_mhz;
84         int bandwidth;
85         u8 buf[12];
86         struct i2c_msg msg = {
87                 .addr = priv->i2c_address,
88                 .flags = 0,
89                 .buf = buf,
90                 .len = 12
91         };
92
93         dprintk("%s:\n", __func__);
94
95         freq_mhz = params->frequency / 1000;
96         bandwidth = params->u.qpsk.symbol_rate / 1000000;
97
98         if (bandwidth > 31)
99                 bandwidth = 31;
100
101         if ((freq_mhz > 949) && (freq_mhz < 2151)) {
102                 buf[0] = 0x01;
103                 buf[1] = 0xac;
104                 if (freq_mhz < 1950)
105                         buf[1] = 0xaa;
106                 if (freq_mhz < 1800)
107                         buf[1] = 0xa8;
108                 if (freq_mhz < 1650)
109                         buf[1] = 0xa6;
110                 if (freq_mhz < 1530)
111                         buf[1] = 0xa5;
112                 if (freq_mhz < 1470)
113                         buf[1] = 0xa4;
114                 if (freq_mhz < 1370)
115                         buf[1] = 0xa2;
116                 if (freq_mhz < 1300)
117                         buf[1] = 0xa1;
118                 if (freq_mhz < 1200)
119                         buf[1] = 0xa0;
120                 if (freq_mhz < 1075)
121                         buf[1] = 0xbc;
122                 if (freq_mhz < 1000)
123                         buf[1] = 0xba;
124                 if (freq_mhz < 1075) {
125                         n = freq_mhz / 8; /* vco=lo*4 */
126                         m = 2;
127                 } else {
128                         n = freq_mhz / 16; /* vco=lo*2 */
129                         m = 1;
130                 }
131                 buf[2] = n >> 1;
132                 buf[3] = (unsigned char)(((n & 1) << 7) |
133                                         (m * freq_mhz - n * 16) | 0x60);
134                 buf[4] = 0x04;
135                 buf[5] = 0x0e;
136
137                 buf[6] = (unsigned char)(bandwidth);
138
139                 buf[7] = 0xd8;
140                 buf[8] = 0xd0;
141                 buf[9] = 0x50;
142                 buf[10] = 0xeb;
143                 buf[11] = 0x4f;
144
145                 if (fe->ops.i2c_gate_ctrl)
146                         fe->ops.i2c_gate_ctrl(fe, 1);
147
148                 ret = i2c_transfer(priv->i2c, &msg, 1);
149                 if (ret != 1)
150                         dprintk("%s: i2c error\n", __func__);
151
152                 udelay(10);
153                 if (fe->ops.i2c_gate_ctrl)
154                         fe->ops.i2c_gate_ctrl(fe, 0);
155
156                 buf[0] = 0x07;
157                 buf[1] = 0xdf;
158                 buf[2] = 0xd0;
159                 buf[3] = 0x50;
160                 buf[4] = 0xfb;
161                 msg.len = 5;
162
163                 if (fe->ops.i2c_gate_ctrl)
164                         fe->ops.i2c_gate_ctrl(fe, 1);
165
166                 ret = i2c_transfer(priv->i2c, &msg, 1);
167                 if (ret != 1)
168                         dprintk("%s: i2c error\n", __func__);
169
170                 udelay(10);
171                 if (fe->ops.i2c_gate_ctrl)
172                         fe->ops.i2c_gate_ctrl(fe, 0);
173
174                 priv->frequency = freq_mhz * 1000;
175
176                 return (ret == 1) ? 0 : ret;
177         }
178         return -1;
179 }
180
181 static int stb6000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
182 {
183         struct stb6000_priv *priv = fe->tuner_priv;
184         *frequency = priv->frequency;
185         return 0;
186 }
187
188 static struct dvb_tuner_ops stb6000_tuner_ops = {
189         .info = {
190                 .name = "ST STB6000",
191                 .frequency_min = 950000,
192                 .frequency_max = 2150000
193         },
194         .release = stb6000_release,
195         .sleep = stb6000_sleep,
196         .set_params = stb6000_set_params,
197         .get_frequency = stb6000_get_frequency,
198 };
199
200 struct dvb_frontend *stb6000_attach(struct dvb_frontend *fe, int addr,
201                                                 struct i2c_adapter *i2c)
202 {
203         struct stb6000_priv *priv = NULL;
204         u8 b0[] = { 0 };
205         u8 b1[] = { 0, 0 };
206         struct i2c_msg msg[2] = {
207                 {
208                         .addr = addr,
209                         .flags = 0,
210                         .buf = b0,
211                         .len = 0
212                 }, {
213                         .addr = addr,
214                         .flags = I2C_M_RD,
215                         .buf = b1,
216                         .len = 2
217                 }
218         };
219         int ret;
220
221         dprintk("%s:\n", __func__);
222
223         if (fe->ops.i2c_gate_ctrl)
224                 fe->ops.i2c_gate_ctrl(fe, 1);
225
226         /* is some i2c device here ? */
227         ret = i2c_transfer(i2c, msg, 2);
228         if (fe->ops.i2c_gate_ctrl)
229                 fe->ops.i2c_gate_ctrl(fe, 0);
230
231         if (ret != 2)
232                 return NULL;
233
234         priv = kzalloc(sizeof(struct stb6000_priv), GFP_KERNEL);
235         if (priv == NULL)
236                 return NULL;
237
238         priv->i2c_address = addr;
239         priv->i2c = i2c;
240
241         memcpy(&fe->ops.tuner_ops, &stb6000_tuner_ops,
242                                 sizeof(struct dvb_tuner_ops));
243
244         fe->tuner_priv = priv;
245
246         return fe;
247 }
248 EXPORT_SYMBOL(stb6000_attach);
249
250 module_param(debug, int, 0644);
251 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
252
253 MODULE_DESCRIPTION("DVB STB6000 driver");
254 MODULE_AUTHOR("Igor M. Liplianin <liplianin@me.by>");
255 MODULE_LICENSE("GPL");