2 Intersil ISL6423 SEC and LNB Power supply controller
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.
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.
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.
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>
29 #include "dvb_frontend.h"
32 static unsigned int verbose;
33 module_param(verbose, int, 0644);
34 MODULE_PARM_DESC(verbose, "Set Verbosity level");
42 #define dprintk(__y, __z, format, arg...) do { \
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); \
54 printk(format, ##arg); \
59 const struct isl6423_config *config;
60 struct i2c_adapter *i2c;
68 static int isl6423_write(struct isl6423_dev *isl6423, u8 reg)
70 struct i2c_adapter *i2c = isl6423->i2c;
71 u8 addr = isl6423->config->addr;
74 struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = ®, .len = 1 };
76 dprintk(FE_DEBUG, 1, "write reg %02X", reg);
77 err = i2c_transfer(i2c, &msg, 1);
83 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
87 static int isl6423_set_modulation(struct dvb_frontend *fe)
89 struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
90 const struct isl6423_config *config = isl6423->config;
96 if (config->mod_extern)
101 err = isl6423_write(isl6423, reg_2);
107 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
111 static int isl6423_voltage_boost(struct dvb_frontend *fe, long arg)
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;
119 /* EN = 1, VSPEN = 1, VBOT = 1 */
124 /* EN = 1, VSPEN = 1, VBOT = 0 */
129 err = isl6423_write(isl6423, reg_3);
133 err = isl6423_write(isl6423, reg_4);
137 isl6423->reg_3 = reg_3;
138 isl6423->reg_4 = reg_4;
142 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
147 static int isl6423_set_voltage(struct dvb_frontend *fe,
148 enum fe_sec_voltage voltage)
150 struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
151 u8 reg_3 = isl6423->reg_3;
152 u8 reg_4 = isl6423->reg_4;
156 case SEC_VOLTAGE_OFF:
162 /* EN = 1, VSPEN = 1, VTOP = 0, VBOT = 0 */
169 /* EN = 1, VSPEN = 1, VTOP = 1, VBOT = 0 */
179 err = isl6423_write(isl6423, reg_3);
183 err = isl6423_write(isl6423, reg_4);
187 isl6423->reg_3 = reg_3;
188 isl6423->reg_4 = reg_4;
192 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
196 static int isl6423_set_current(struct dvb_frontend *fe)
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;
203 switch (config->current_max) {
204 case SEC_CURRENT_275m:
206 /* ISELH = 0, ISELL = 0 */
210 case SEC_CURRENT_515m:
212 /* ISELH = 0, ISELL = 1 */
217 case SEC_CURRENT_635m:
219 /* ISELH = 1, ISELL = 0 */
224 case SEC_CURRENT_800m:
226 /* ISELH = 1, ISELL = 1 */
231 err = isl6423_write(isl6423, reg_3);
235 switch (config->curlim) {
236 case SEC_CURRENT_LIM_ON:
241 case SEC_CURRENT_LIM_OFF:
247 err = isl6423_write(isl6423, reg_3);
251 isl6423->reg_3 = reg_3;
255 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
259 static void isl6423_release(struct dvb_frontend *fe)
261 isl6423_set_voltage(fe, SEC_VOLTAGE_OFF);
267 struct dvb_frontend *isl6423_attach(struct dvb_frontend *fe,
268 struct i2c_adapter *i2c,
269 const struct isl6423_config *config)
271 struct isl6423_dev *isl6423;
273 isl6423 = kzalloc(sizeof(struct isl6423_dev), GFP_KERNEL);
277 isl6423->config = config;
279 fe->sec_priv = isl6423;
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;
286 if (isl6423_set_current(fe))
289 if (isl6423_set_modulation(fe))
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;
304 EXPORT_SYMBOL(isl6423_attach);
306 MODULE_DESCRIPTION("ISL6423 SEC");
307 MODULE_AUTHOR("Manu Abraham");
308 MODULE_LICENSE("GPL");