309 lines
6.5 KiB
C
309 lines
6.5 KiB
C
/*
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Intersil ISL6423 SEC and LNB Power supply controller
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Copyright (C) Manu Abraham <abraham.manu@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include "dvb_frontend.h"
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#include "isl6423.h"
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static unsigned int verbose;
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module_param(verbose, int, 0644);
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MODULE_PARM_DESC(verbose, "Set Verbosity level");
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#define FE_ERROR 0
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#define FE_NOTICE 1
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#define FE_INFO 2
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#define FE_DEBUG 3
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#define FE_DEBUGREG 4
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#define dprintk(__y, __z, format, arg...) do { \
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if (__z) { \
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if ((verbose > FE_ERROR) && (verbose > __y)) \
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printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
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else if ((verbose > FE_NOTICE) && (verbose > __y)) \
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printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
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else if ((verbose > FE_INFO) && (verbose > __y)) \
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printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
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else if ((verbose > FE_DEBUG) && (verbose > __y)) \
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printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
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} else { \
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if (verbose > __y) \
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printk(format, ##arg); \
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} \
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} while (0)
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struct isl6423_dev {
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const struct isl6423_config *config;
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struct i2c_adapter *i2c;
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u8 reg_3;
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u8 reg_4;
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unsigned int verbose;
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};
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static int isl6423_write(struct isl6423_dev *isl6423, u8 reg)
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{
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struct i2c_adapter *i2c = isl6423->i2c;
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u8 addr = isl6423->config->addr;
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int err = 0;
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struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = ®, .len = 1 };
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dprintk(FE_DEBUG, 1, "write reg %02X", reg);
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err = i2c_transfer(i2c, &msg, 1);
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if (err < 0)
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goto exit;
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return 0;
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exit:
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dprintk(FE_ERROR, 1, "I/O error <%d>", err);
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return err;
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}
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static int isl6423_set_modulation(struct dvb_frontend *fe)
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{
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struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
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const struct isl6423_config *config = isl6423->config;
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int err = 0;
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u8 reg_2 = 0;
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reg_2 = 0x01 << 5;
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if (config->mod_extern)
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reg_2 |= (1 << 3);
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else
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reg_2 |= (1 << 4);
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err = isl6423_write(isl6423, reg_2);
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if (err < 0)
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goto exit;
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return 0;
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exit:
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dprintk(FE_ERROR, 1, "I/O error <%d>", err);
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return err;
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}
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static int isl6423_voltage_boost(struct dvb_frontend *fe, long arg)
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{
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struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
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u8 reg_3 = isl6423->reg_3;
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u8 reg_4 = isl6423->reg_4;
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int err = 0;
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if (arg) {
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/* EN = 1, VSPEN = 1, VBOT = 1 */
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reg_4 |= (1 << 4);
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reg_4 |= 0x1;
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reg_3 |= (1 << 3);
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} else {
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/* EN = 1, VSPEN = 1, VBOT = 0 */
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reg_4 |= (1 << 4);
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reg_4 &= ~0x1;
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reg_3 |= (1 << 3);
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}
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err = isl6423_write(isl6423, reg_3);
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if (err < 0)
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goto exit;
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err = isl6423_write(isl6423, reg_4);
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if (err < 0)
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goto exit;
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isl6423->reg_3 = reg_3;
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isl6423->reg_4 = reg_4;
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return 0;
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exit:
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dprintk(FE_ERROR, 1, "I/O error <%d>", err);
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return err;
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}
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static int isl6423_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
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u8 reg_3 = isl6423->reg_3;
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u8 reg_4 = isl6423->reg_4;
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int err = 0;
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switch (voltage) {
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case SEC_VOLTAGE_OFF:
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/* EN = 0 */
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reg_4 &= ~(1 << 4);
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break;
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case SEC_VOLTAGE_13:
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/* EN = 1, VSPEN = 1, VTOP = 0, VBOT = 0 */
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reg_4 |= (1 << 4);
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reg_4 &= ~0x3;
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reg_3 |= (1 << 3);
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break;
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case SEC_VOLTAGE_18:
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/* EN = 1, VSPEN = 1, VTOP = 1, VBOT = 0 */
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reg_4 |= (1 << 4);
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reg_4 |= 0x2;
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reg_4 &= ~0x1;
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reg_3 |= (1 << 3);
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break;
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default:
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break;
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}
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err = isl6423_write(isl6423, reg_3);
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if (err < 0)
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goto exit;
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err = isl6423_write(isl6423, reg_4);
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if (err < 0)
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goto exit;
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isl6423->reg_3 = reg_3;
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isl6423->reg_4 = reg_4;
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return 0;
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exit:
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dprintk(FE_ERROR, 1, "I/O error <%d>", err);
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return err;
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}
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static int isl6423_set_current(struct dvb_frontend *fe)
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{
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struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
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u8 reg_3 = isl6423->reg_3;
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const struct isl6423_config *config = isl6423->config;
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int err = 0;
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switch (config->current_max) {
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case SEC_CURRENT_275m:
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/* 275mA */
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/* ISELH = 0, ISELL = 0 */
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reg_3 &= ~0x3;
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break;
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case SEC_CURRENT_515m:
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/* 515mA */
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/* ISELH = 0, ISELL = 1 */
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reg_3 &= ~0x2;
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reg_3 |= 0x1;
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break;
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case SEC_CURRENT_635m:
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/* 635mA */
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/* ISELH = 1, ISELL = 0 */
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reg_3 &= ~0x1;
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reg_3 |= 0x2;
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break;
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case SEC_CURRENT_800m:
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/* 800mA */
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/* ISELH = 1, ISELL = 1 */
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reg_3 |= 0x3;
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break;
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}
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err = isl6423_write(isl6423, reg_3);
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if (err < 0)
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goto exit;
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switch (config->curlim) {
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case SEC_CURRENT_LIM_ON:
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/* DCL = 0 */
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reg_3 &= ~0x10;
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break;
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case SEC_CURRENT_LIM_OFF:
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/* DCL = 1 */
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reg_3 |= 0x10;
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break;
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}
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err = isl6423_write(isl6423, reg_3);
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if (err < 0)
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goto exit;
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isl6423->reg_3 = reg_3;
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return 0;
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exit:
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dprintk(FE_ERROR, 1, "I/O error <%d>", err);
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return err;
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}
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static void isl6423_release(struct dvb_frontend *fe)
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{
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isl6423_set_voltage(fe, SEC_VOLTAGE_OFF);
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kfree(fe->sec_priv);
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fe->sec_priv = NULL;
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}
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struct dvb_frontend *isl6423_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c,
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const struct isl6423_config *config)
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{
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struct isl6423_dev *isl6423;
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isl6423 = kzalloc(sizeof(struct isl6423_dev), GFP_KERNEL);
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if (!isl6423)
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return NULL;
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isl6423->config = config;
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isl6423->i2c = i2c;
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fe->sec_priv = isl6423;
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/* SR3H = 0, SR3M = 1, SR3L = 0 */
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isl6423->reg_3 = 0x02 << 5;
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/* SR4H = 0, SR4M = 1, SR4L = 1 */
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isl6423->reg_4 = 0x03 << 5;
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if (isl6423_set_current(fe))
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goto exit;
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if (isl6423_set_modulation(fe))
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goto exit;
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fe->ops.release_sec = isl6423_release;
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fe->ops.set_voltage = isl6423_set_voltage;
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fe->ops.enable_high_lnb_voltage = isl6423_voltage_boost;
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isl6423->verbose = verbose;
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return fe;
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exit:
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kfree(isl6423);
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fe->sec_priv = NULL;
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return NULL;
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}
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EXPORT_SYMBOL(isl6423_attach);
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MODULE_DESCRIPTION("ISL6423 SEC");
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MODULE_AUTHOR("Manu Abraham");
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MODULE_LICENSE("GPL");
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