1 // SPDX-License-Identifier: GPL-2.0-or-later
3 Intersil ISL6423 SEC and LNB Power supply controller
5 Copyright (C) Manu Abraham <abraham.manu@gmail.com>
9 #include <linux/delay.h>
10 #include <linux/errno.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/string.h>
15 #include <linux/slab.h>
17 #include <media/dvb_frontend.h>
20 static unsigned int verbose;
21 module_param(verbose, int, 0644);
22 MODULE_PARM_DESC(verbose, "Set Verbosity level");
30 #define dprintk(__y, __z, format, arg...) do { \
32 if ((verbose > FE_ERROR) && (verbose > __y)) \
33 printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
34 else if ((verbose > FE_NOTICE) && (verbose > __y)) \
35 printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
36 else if ((verbose > FE_INFO) && (verbose > __y)) \
37 printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
38 else if ((verbose > FE_DEBUG) && (verbose > __y)) \
39 printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
42 printk(format, ##arg); \
47 const struct isl6423_config *config;
48 struct i2c_adapter *i2c;
56 static int isl6423_write(struct isl6423_dev *isl6423, u8 reg)
58 struct i2c_adapter *i2c = isl6423->i2c;
59 u8 addr = isl6423->config->addr;
62 struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = ®, .len = 1 };
64 dprintk(FE_DEBUG, 1, "write reg %02X", reg);
65 err = i2c_transfer(i2c, &msg, 1);
71 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
75 static int isl6423_set_modulation(struct dvb_frontend *fe)
77 struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
78 const struct isl6423_config *config = isl6423->config;
84 if (config->mod_extern)
89 err = isl6423_write(isl6423, reg_2);
95 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
99 static int isl6423_voltage_boost(struct dvb_frontend *fe, long arg)
101 struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
102 u8 reg_3 = isl6423->reg_3;
103 u8 reg_4 = isl6423->reg_4;
107 /* EN = 1, VSPEN = 1, VBOT = 1 */
112 /* EN = 1, VSPEN = 1, VBOT = 0 */
117 err = isl6423_write(isl6423, reg_3);
121 err = isl6423_write(isl6423, reg_4);
125 isl6423->reg_3 = reg_3;
126 isl6423->reg_4 = reg_4;
130 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
135 static int isl6423_set_voltage(struct dvb_frontend *fe,
136 enum fe_sec_voltage voltage)
138 struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
139 u8 reg_3 = isl6423->reg_3;
140 u8 reg_4 = isl6423->reg_4;
144 case SEC_VOLTAGE_OFF:
150 /* EN = 1, VSPEN = 1, VTOP = 0, VBOT = 0 */
157 /* EN = 1, VSPEN = 1, VTOP = 1, VBOT = 0 */
167 err = isl6423_write(isl6423, reg_3);
171 err = isl6423_write(isl6423, reg_4);
175 isl6423->reg_3 = reg_3;
176 isl6423->reg_4 = reg_4;
180 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
184 static int isl6423_set_current(struct dvb_frontend *fe)
186 struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
187 u8 reg_3 = isl6423->reg_3;
188 const struct isl6423_config *config = isl6423->config;
191 switch (config->current_max) {
192 case SEC_CURRENT_275m:
194 /* ISELH = 0, ISELL = 0 */
198 case SEC_CURRENT_515m:
200 /* ISELH = 0, ISELL = 1 */
205 case SEC_CURRENT_635m:
207 /* ISELH = 1, ISELL = 0 */
212 case SEC_CURRENT_800m:
214 /* ISELH = 1, ISELL = 1 */
219 err = isl6423_write(isl6423, reg_3);
223 switch (config->curlim) {
224 case SEC_CURRENT_LIM_ON:
229 case SEC_CURRENT_LIM_OFF:
235 err = isl6423_write(isl6423, reg_3);
239 isl6423->reg_3 = reg_3;
243 dprintk(FE_ERROR, 1, "I/O error <%d>", err);
247 static void isl6423_release(struct dvb_frontend *fe)
249 isl6423_set_voltage(fe, SEC_VOLTAGE_OFF);
255 struct dvb_frontend *isl6423_attach(struct dvb_frontend *fe,
256 struct i2c_adapter *i2c,
257 const struct isl6423_config *config)
259 struct isl6423_dev *isl6423;
261 isl6423 = kzalloc(sizeof(struct isl6423_dev), GFP_KERNEL);
265 isl6423->config = config;
267 fe->sec_priv = isl6423;
269 /* SR3H = 0, SR3M = 1, SR3L = 0 */
270 isl6423->reg_3 = 0x02 << 5;
271 /* SR4H = 0, SR4M = 1, SR4L = 1 */
272 isl6423->reg_4 = 0x03 << 5;
274 if (isl6423_set_current(fe))
277 if (isl6423_set_modulation(fe))
280 fe->ops.release_sec = isl6423_release;
281 fe->ops.set_voltage = isl6423_set_voltage;
282 fe->ops.enable_high_lnb_voltage = isl6423_voltage_boost;
283 isl6423->verbose = verbose;
292 EXPORT_SYMBOL(isl6423_attach);
294 MODULE_DESCRIPTION("ISL6423 SEC");
295 MODULE_AUTHOR("Manu Abraham");
296 MODULE_LICENSE("GPL");