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e415c689 MA |
1 | /* |
2 | Intersil ISL6423 SEC and LNB Power supply controller | |
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/delay.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/slab.h> | |
28 | ||
29 | #include "dvb_frontend.h" | |
30 | #include "isl6423.h" | |
31 | ||
32 | static unsigned int verbose; | |
33 | module_param(verbose, int, 0644); | |
34 | MODULE_PARM_DESC(verbose, "Set Verbosity level"); | |
35 | ||
36 | #define FE_ERROR 0 | |
37 | #define FE_NOTICE 1 | |
38 | #define FE_INFO 2 | |
39 | #define FE_DEBUG 3 | |
40 | #define FE_DEBUGREG 4 | |
41 | ||
42 | #define dprintk(__y, __z, format, arg...) do { \ | |
43 | if (__z) { \ | |
44 | if ((verbose > FE_ERROR) && (verbose > __y)) \ | |
45 | printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \ | |
46 | else if ((verbose > FE_NOTICE) && (verbose > __y)) \ | |
47 | printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \ | |
48 | else if ((verbose > FE_INFO) && (verbose > __y)) \ | |
49 | printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \ | |
50 | else if ((verbose > FE_DEBUG) && (verbose > __y)) \ | |
51 | printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \ | |
52 | } else { \ | |
53 | if (verbose > __y) \ | |
54 | printk(format, ##arg); \ | |
55 | } \ | |
56 | } while (0) | |
57 | ||
58 | struct isl6423_dev { | |
59 | const struct isl6423_config *config; | |
60 | struct i2c_adapter *i2c; | |
61 | ||
62 | u8 reg_3; | |
63 | u8 reg_4; | |
64 | ||
65 | unsigned int verbose; | |
66 | }; | |
67 | ||
68 | static int isl6423_write(struct isl6423_dev *isl6423, u8 reg) | |
69 | { | |
70 | struct i2c_adapter *i2c = isl6423->i2c; | |
71 | u8 addr = isl6423->config->addr; | |
72 | int err = 0; | |
73 | ||
74 | struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = ®, .len = 1 }; | |
75 | ||
54d859ec | 76 | dprintk(FE_DEBUG, 1, "write reg %02X", reg); |
e415c689 MA |
77 | err = i2c_transfer(i2c, &msg, 1); |
78 | if (err < 0) | |
79 | goto exit; | |
80 | return 0; | |
81 | ||
82 | exit: | |
83 | dprintk(FE_ERROR, 1, "I/O error <%d>", err); | |
84 | return err; | |
85 | } | |
86 | ||
87 | static int isl6423_set_modulation(struct dvb_frontend *fe) | |
88 | { | |
89 | struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv; | |
90 | const struct isl6423_config *config = isl6423->config; | |
91 | int err = 0; | |
92 | u8 reg_2 = 0; | |
93 | ||
94 | reg_2 = 0x01 << 5; | |
95 | ||
96 | if (config->mod_extern) | |
97 | reg_2 |= (1 << 3); | |
98 | else | |
99 | reg_2 |= (1 << 4); | |
100 | ||
101 | err = isl6423_write(isl6423, reg_2); | |
102 | if (err < 0) | |
103 | goto exit; | |
104 | return 0; | |
105 | ||
106 | exit: | |
107 | dprintk(FE_ERROR, 1, "I/O error <%d>", err); | |
108 | return err; | |
109 | } | |
110 | ||
111 | static int isl6423_voltage_boost(struct dvb_frontend *fe, long arg) | |
112 | { | |
113 | struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv; | |
114 | u8 reg_3 = isl6423->reg_3; | |
115 | u8 reg_4 = isl6423->reg_4; | |
116 | int err = 0; | |
117 | ||
118 | if (arg) { | |
119 | /* EN = 1, VSPEN = 1, VBOT = 1 */ | |
120 | reg_4 |= (1 << 4); | |
121 | reg_4 |= 0x1; | |
122 | reg_3 |= (1 << 3); | |
123 | } else { | |
124 | /* EN = 1, VSPEN = 1, VBOT = 0 */ | |
125 | reg_4 |= (1 << 4); | |
126 | reg_4 &= ~0x1; | |
127 | reg_3 |= (1 << 3); | |
128 | } | |
129 | err = isl6423_write(isl6423, reg_3); | |
130 | if (err < 0) | |
131 | goto exit; | |
132 | ||
133 | err = isl6423_write(isl6423, reg_4); | |
134 | if (err < 0) | |
135 | goto exit; | |
136 | ||
54d859ec AR |
137 | isl6423->reg_3 = reg_3; |
138 | isl6423->reg_4 = reg_4; | |
139 | ||
e415c689 MA |
140 | return 0; |
141 | exit: | |
142 | dprintk(FE_ERROR, 1, "I/O error <%d>", err); | |
143 | return err; | |
144 | } | |
145 | ||
146 | ||
147 | static int isl6423_set_voltage(struct dvb_frontend *fe, | |
148 | enum fe_sec_voltage voltage) | |
149 | { | |
150 | struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv; | |
54d859ec | 151 | u8 reg_3 = isl6423->reg_3; |
e415c689 MA |
152 | u8 reg_4 = isl6423->reg_4; |
153 | int err = 0; | |
154 | ||
e415c689 MA |
155 | switch (voltage) { |
156 | case SEC_VOLTAGE_OFF: | |
157 | /* EN = 0 */ | |
158 | reg_4 &= ~(1 << 4); | |
159 | break; | |
160 | ||
161 | case SEC_VOLTAGE_13: | |
162 | /* EN = 1, VSPEN = 1, VTOP = 0, VBOT = 0 */ | |
163 | reg_4 |= (1 << 4); | |
164 | reg_4 &= ~0x3; | |
54d859ec | 165 | reg_3 |= (1 << 3); |
e415c689 MA |
166 | break; |
167 | ||
168 | case SEC_VOLTAGE_18: | |
169 | /* EN = 1, VSPEN = 1, VTOP = 1, VBOT = 0 */ | |
170 | reg_4 |= (1 << 4); | |
171 | reg_4 |= 0x2; | |
172 | reg_4 &= ~0x1; | |
54d859ec | 173 | reg_3 |= (1 << 3); |
e415c689 MA |
174 | break; |
175 | ||
176 | default: | |
177 | break; | |
178 | } | |
54d859ec AR |
179 | err = isl6423_write(isl6423, reg_3); |
180 | if (err < 0) | |
181 | goto exit; | |
182 | ||
e415c689 MA |
183 | err = isl6423_write(isl6423, reg_4); |
184 | if (err < 0) | |
185 | goto exit; | |
186 | ||
54d859ec AR |
187 | isl6423->reg_3 = reg_3; |
188 | isl6423->reg_4 = reg_4; | |
189 | ||
e415c689 MA |
190 | return 0; |
191 | exit: | |
192 | dprintk(FE_ERROR, 1, "I/O error <%d>", err); | |
193 | return err; | |
194 | } | |
195 | ||
196 | static int isl6423_set_current(struct dvb_frontend *fe) | |
197 | { | |
198 | struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv; | |
199 | u8 reg_3 = isl6423->reg_3; | |
200 | const struct isl6423_config *config = isl6423->config; | |
201 | int err = 0; | |
202 | ||
e415c689 MA |
203 | switch (config->current_max) { |
204 | case SEC_CURRENT_275m: | |
205 | /* 275mA */ | |
206 | /* ISELH = 0, ISELL = 0 */ | |
207 | reg_3 &= ~0x3; | |
208 | break; | |
209 | ||
210 | case SEC_CURRENT_515m: | |
211 | /* 515mA */ | |
212 | /* ISELH = 0, ISELL = 1 */ | |
213 | reg_3 &= ~0x2; | |
214 | reg_3 |= 0x1; | |
215 | break; | |
216 | ||
217 | case SEC_CURRENT_635m: | |
218 | /* 635mA */ | |
219 | /* ISELH = 1, ISELL = 0 */ | |
220 | reg_3 &= ~0x1; | |
221 | reg_3 |= 0x2; | |
222 | break; | |
223 | ||
224 | case SEC_CURRENT_800m: | |
225 | /* 800mA */ | |
226 | /* ISELH = 1, ISELL = 1 */ | |
227 | reg_3 |= 0x3; | |
228 | break; | |
229 | } | |
230 | ||
231 | err = isl6423_write(isl6423, reg_3); | |
232 | if (err < 0) | |
233 | goto exit; | |
234 | ||
235 | switch (config->curlim) { | |
236 | case SEC_CURRENT_LIM_ON: | |
54d859ec AR |
237 | /* DCL = 0 */ |
238 | reg_3 &= ~0x10; | |
e415c689 MA |
239 | break; |
240 | ||
241 | case SEC_CURRENT_LIM_OFF: | |
54d859ec AR |
242 | /* DCL = 1 */ |
243 | reg_3 |= 0x10; | |
e415c689 MA |
244 | break; |
245 | } | |
246 | ||
247 | err = isl6423_write(isl6423, reg_3); | |
248 | if (err < 0) | |
249 | goto exit; | |
250 | ||
54d859ec AR |
251 | isl6423->reg_3 = reg_3; |
252 | ||
e415c689 MA |
253 | return 0; |
254 | exit: | |
255 | dprintk(FE_ERROR, 1, "I/O error <%d>", err); | |
256 | return err; | |
257 | } | |
258 | ||
259 | static void isl6423_release(struct dvb_frontend *fe) | |
260 | { | |
261 | isl6423_set_voltage(fe, SEC_VOLTAGE_OFF); | |
262 | ||
263 | kfree(fe->sec_priv); | |
264 | fe->sec_priv = NULL; | |
265 | } | |
266 | ||
267 | struct dvb_frontend *isl6423_attach(struct dvb_frontend *fe, | |
268 | struct i2c_adapter *i2c, | |
269 | const struct isl6423_config *config) | |
270 | { | |
271 | struct isl6423_dev *isl6423; | |
272 | ||
273 | isl6423 = kzalloc(sizeof(struct isl6423_dev), GFP_KERNEL); | |
274 | if (!isl6423) | |
275 | return NULL; | |
276 | ||
277 | isl6423->config = config; | |
278 | isl6423->i2c = i2c; | |
279 | fe->sec_priv = isl6423; | |
280 | ||
54d859ec AR |
281 | /* SR3H = 0, SR3M = 1, SR3L = 0 */ |
282 | isl6423->reg_3 = 0x02 << 5; | |
283 | /* SR4H = 0, SR4M = 1, SR4L = 1 */ | |
284 | isl6423->reg_4 = 0x03 << 5; | |
285 | ||
e415c689 MA |
286 | if (isl6423_set_current(fe)) |
287 | goto exit; | |
288 | ||
289 | if (isl6423_set_modulation(fe)) | |
290 | goto exit; | |
291 | ||
292 | fe->ops.release_sec = isl6423_release; | |
293 | fe->ops.set_voltage = isl6423_set_voltage; | |
294 | fe->ops.enable_high_lnb_voltage = isl6423_voltage_boost; | |
295 | isl6423->verbose = verbose; | |
296 | ||
297 | return fe; | |
298 | ||
299 | exit: | |
300 | kfree(isl6423); | |
301 | fe->sec_priv = NULL; | |
302 | return NULL; | |
303 | } | |
304 | EXPORT_SYMBOL(isl6423_attach); | |
305 | ||
306 | MODULE_DESCRIPTION("ISL6423 SEC"); | |
307 | MODULE_AUTHOR("Manu Abraham"); | |
308 | MODULE_LICENSE("GPL"); |