blob: c085e58a94bfe7d64b876a3421d244eb392b473d [file] [log] [blame]
Igor M. Liplianin2ccf5a92009-06-20 09:51:48 -03001/*
2 * Driver for Zarlink ZL10039 DVB-S tuner
3 *
4 * Copyright 2007 Jan D. Louw <jd.louw@mweb.co.za>
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#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/string.h>
25#include <linux/slab.h>
26#include <linux/dvb/frontend.h>
27
28#include "dvb_frontend.h"
29#include "zl10039.h"
30
31static int debug;
32
33#define dprintk(args...) \
34 do { \
35 if (debug) \
36 printk(KERN_DEBUG args); \
37 } while (0)
38
39enum zl10039_model_id {
40 ID_ZL10039 = 1
41};
42
43struct zl10039_state {
44 struct i2c_adapter *i2c;
45 u8 i2c_addr;
46 u8 id;
47};
48
49enum zl10039_reg_addr {
50 PLL0 = 0,
51 PLL1,
52 PLL2,
53 PLL3,
54 RFFE,
55 BASE0,
56 BASE1,
57 BASE2,
58 LO0,
59 LO1,
60 LO2,
61 LO3,
62 LO4,
63 LO5,
64 LO6,
65 GENERAL
66};
67
68static int zl10039_read(const struct zl10039_state *state,
69 const enum zl10039_reg_addr reg, u8 *buf,
70 const size_t count)
71{
72 u8 regbuf[] = { reg };
73 struct i2c_msg msg[] = {
74 {/* Write register address */
75 .addr = state->i2c_addr,
76 .flags = 0,
77 .buf = regbuf,
78 .len = 1,
79 }, {/* Read count bytes */
80 .addr = state->i2c_addr,
81 .flags = I2C_M_RD,
82 .buf = buf,
83 .len = count,
84 },
85 };
86
87 dprintk("%s\n", __func__);
88
89 if (i2c_transfer(state->i2c, msg, 2) != 2) {
90 dprintk("%s: i2c read error\n", __func__);
91 return -EREMOTEIO;
92 }
93
94 return 0; /* Success */
95}
96
97static int zl10039_write(struct zl10039_state *state,
98 const enum zl10039_reg_addr reg, const u8 *src,
99 const size_t count)
100{
101 u8 buf[count + 1];
102 struct i2c_msg msg = {
103 .addr = state->i2c_addr,
104 .flags = 0,
105 .buf = buf,
106 .len = count + 1,
107 };
108
109 dprintk("%s\n", __func__);
110 /* Write register address and data in one go */
111 buf[0] = reg;
112 memcpy(&buf[1], src, count);
113 if (i2c_transfer(state->i2c, &msg, 1) != 1) {
114 dprintk("%s: i2c write error\n", __func__);
115 return -EREMOTEIO;
116 }
117
118 return 0; /* Success */
119}
120
121static inline int zl10039_readreg(struct zl10039_state *state,
122 const enum zl10039_reg_addr reg, u8 *val)
123{
124 return zl10039_read(state, reg, val, 1);
125}
126
127static inline int zl10039_writereg(struct zl10039_state *state,
128 const enum zl10039_reg_addr reg,
129 const u8 val)
130{
131 return zl10039_write(state, reg, &val, 1);
132}
133
134static int zl10039_init(struct dvb_frontend *fe)
135{
136 struct zl10039_state *state = fe->tuner_priv;
137 int ret;
138
139 dprintk("%s\n", __func__);
140 if (fe->ops.i2c_gate_ctrl)
141 fe->ops.i2c_gate_ctrl(fe, 1);
142 /* Reset logic */
143 ret = zl10039_writereg(state, GENERAL, 0x40);
144 if (ret < 0) {
145 dprintk("Note: i2c write error normal when resetting the "
146 "tuner\n");
147 }
148 /* Wake up */
149 ret = zl10039_writereg(state, GENERAL, 0x01);
150 if (ret < 0) {
151 dprintk("Tuner power up failed\n");
152 return ret;
153 }
154 if (fe->ops.i2c_gate_ctrl)
155 fe->ops.i2c_gate_ctrl(fe, 0);
156
157 return 0;
158}
159
160static int zl10039_sleep(struct dvb_frontend *fe)
161{
162 struct zl10039_state *state = fe->tuner_priv;
163 int ret;
164
165 dprintk("%s\n", __func__);
166 if (fe->ops.i2c_gate_ctrl)
167 fe->ops.i2c_gate_ctrl(fe, 1);
168 ret = zl10039_writereg(state, GENERAL, 0x80);
169 if (ret < 0) {
170 dprintk("Tuner sleep failed\n");
171 return ret;
172 }
173 if (fe->ops.i2c_gate_ctrl)
174 fe->ops.i2c_gate_ctrl(fe, 0);
175
176 return 0;
177}
178
179static int zl10039_set_params(struct dvb_frontend *fe,
180 struct dvb_frontend_parameters *params)
181{
182 struct zl10039_state *state = fe->tuner_priv;
183 u8 buf[6];
184 u8 bf;
185 u32 fbw;
186 u32 div;
187 int ret;
188
189 dprintk("%s\n", __func__);
190 dprintk("Set frequency = %d, symbol rate = %d\n",
191 params->frequency, params->u.qpsk.symbol_rate);
192
193 /* Assumed 10.111 MHz crystal oscillator */
194 /* Cancelled num/den 80 to prevent overflow */
195 div = (params->frequency * 1000) / 126387;
196 fbw = (params->u.qpsk.symbol_rate * 27) / 32000;
197 /* Cancelled num/den 10 to prevent overflow */
198 bf = ((fbw * 5088) / 1011100) - 1;
199
200 /*PLL divider*/
201 buf[0] = (div >> 8) & 0x7f;
202 buf[1] = (div >> 0) & 0xff;
203 /*Reference divider*/
204 /* Select reference ratio of 80 */
205 buf[2] = 0x1D;
206 /*PLL test modes*/
207 buf[3] = 0x40;
208 /*RF Control register*/
209 buf[4] = 0x6E; /* Bypass enable */
210 /*Baseband filter cutoff */
211 buf[5] = bf;
212
213 /* Open i2c gate */
214 if (fe->ops.i2c_gate_ctrl)
215 fe->ops.i2c_gate_ctrl(fe, 1);
216 /* BR = 10, Enable filter adjustment */
217 ret = zl10039_writereg(state, BASE1, 0x0A);
218 if (ret < 0)
219 goto error;
220 /* Write new config values */
221 ret = zl10039_write(state, PLL0, buf, sizeof(buf));
222 if (ret < 0)
223 goto error;
224 /* BR = 10, Disable filter adjustment */
225 ret = zl10039_writereg(state, BASE1, 0x6A);
226 if (ret < 0)
227 goto error;
228
229 /* Close i2c gate */
230 if (fe->ops.i2c_gate_ctrl)
231 fe->ops.i2c_gate_ctrl(fe, 0);
232 return 0;
233error:
234 dprintk("Error setting tuner\n");
235 return ret;
236}
237
238static int zl10039_release(struct dvb_frontend *fe)
239{
240 struct zl10039_state *state = fe->tuner_priv;
241
242 dprintk("%s\n", __func__);
243 kfree(state);
244 fe->tuner_priv = NULL;
245 return 0;
246}
247
248static struct dvb_tuner_ops zl10039_ops = {
249 .release = zl10039_release,
250 .init = zl10039_init,
251 .sleep = zl10039_sleep,
252 .set_params = zl10039_set_params,
253};
254
255struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe,
256 u8 i2c_addr, struct i2c_adapter *i2c)
257{
258 struct zl10039_state *state = NULL;
259
260 dprintk("%s\n", __func__);
261 state = kmalloc(sizeof(struct zl10039_state), GFP_KERNEL);
262 if (state == NULL)
263 goto error;
264
265 state->i2c = i2c;
266 state->i2c_addr = i2c_addr;
267
268 /* Open i2c gate */
269 if (fe->ops.i2c_gate_ctrl)
270 fe->ops.i2c_gate_ctrl(fe, 1);
271 /* check if this is a valid tuner */
272 if (zl10039_readreg(state, GENERAL, &state->id) < 0) {
273 /* Close i2c gate */
274 if (fe->ops.i2c_gate_ctrl)
275 fe->ops.i2c_gate_ctrl(fe, 0);
276 goto error;
277 }
278 /* Close i2c gate */
279 if (fe->ops.i2c_gate_ctrl)
280 fe->ops.i2c_gate_ctrl(fe, 0);
281
282 state->id = state->id & 0x0f;
283 switch (state->id) {
284 case ID_ZL10039:
285 strcpy(fe->ops.tuner_ops.info.name,
286 "Zarlink ZL10039 DVB-S tuner");
287 break;
288 default:
289 dprintk("Chip ID=%x does not match a known type\n", state->id);
Igor M. Liplianin2ccf5a92009-06-20 09:51:48 -0300290 goto error;
291 }
292
293 memcpy(&fe->ops.tuner_ops, &zl10039_ops, sizeof(struct dvb_tuner_ops));
294 fe->tuner_priv = state;
295 dprintk("Tuner attached @ i2c address 0x%02x\n", i2c_addr);
296 return fe;
297error:
298 kfree(state);
299 return NULL;
300}
301EXPORT_SYMBOL(zl10039_attach);
302
303module_param(debug, int, 0644);
304MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
305MODULE_DESCRIPTION("Zarlink ZL10039 DVB-S tuner driver");
306MODULE_AUTHOR("Jan D. Louw <jd.louw@mweb.co.za>");
307MODULE_LICENSE("GPL");