^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * isl6421.h - driver for lnb supply and control ic ISL6421
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006 Andrew de Quincey
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2006 Oliver Endriss
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * the project's page is at https://linuxtv.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <media/dvb_frontend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "isl6421.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct isl6421 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u8 config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u8 override_or;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u8 override_and;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct i2c_adapter *i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u8 i2c_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) bool is_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int isl6421_set_voltage(struct dvb_frontend *fe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) enum fe_sec_voltage voltage)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u8 buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) bool is_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct i2c_msg msg[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .addr = isl6421->i2c_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .flags = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .buf = &isl6421->config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .len = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) .addr = isl6421->i2c_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) .flags = I2C_M_RD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) .buf = &buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .len = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) switch(voltage) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) case SEC_VOLTAGE_OFF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) is_off = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) case SEC_VOLTAGE_13:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) is_off = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) isl6421->config |= ISL6421_EN1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) case SEC_VOLTAGE_18:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) is_off = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * If LNBf were not powered on, disable dynamic current limit, as,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * according with datasheet, highly capacitive load on the output may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * cause a difficult start-up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (isl6421->is_off && !is_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) isl6421->config |= ISL6421_DCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) isl6421->config |= isl6421->override_or;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) isl6421->config &= isl6421->override_and;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) ret = i2c_transfer(isl6421->i2c, msg, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (ret != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /* Store off status now in case future commands fail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) isl6421->is_off = is_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /* On overflow, the device will try again after 900 ms (typically) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (!is_off && (buf & ISL6421_OLF1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) msleep(1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /* Re-enable dynamic current limit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if ((isl6421->config & ISL6421_DCL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) !(isl6421->override_or & ISL6421_DCL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) isl6421->config &= ~ISL6421_DCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ret = i2c_transfer(isl6421->i2c, msg, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (ret != 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Check if overload flag is active. If so, disable power */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!is_off && (buf & ISL6421_OLF1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = i2c_transfer(isl6421->i2c, msg, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (ret != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) isl6421->is_off = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) dev_warn(&isl6421->i2c->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) "Overload current detected. disabling LNBf power\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .buf = &isl6421->config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .len = sizeof(isl6421->config) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) isl6421->config |= ISL6421_LLC1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) isl6421->config &= ~ISL6421_LLC1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) isl6421->config |= isl6421->override_or;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) isl6421->config &= isl6421->override_and;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int isl6421_set_tone(struct dvb_frontend *fe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) enum fe_sec_tone_mode tone)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .buf = &isl6421->config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .len = sizeof(isl6421->config) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) switch (tone) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) case SEC_TONE_ON:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) isl6421->config |= ISL6421_ENT1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) case SEC_TONE_OFF:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) isl6421->config &= ~ISL6421_ENT1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) isl6421->config |= isl6421->override_or;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) isl6421->config &= isl6421->override_and;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static void isl6421_release(struct dvb_frontend *fe)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* power off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /* free */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) kfree(fe->sec_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) fe->sec_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) u8 override_set, u8 override_clear, bool override_tone)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (!isl6421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /* default configuration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) isl6421->config = ISL6421_ISEL1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) isl6421->i2c = i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) isl6421->i2c_addr = i2c_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) fe->sec_priv = isl6421;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /* bits which should be forced to '1' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) isl6421->override_or = override_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* bits which should be forced to '0' */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) isl6421->override_and = ~override_clear;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /* detect if it is present or not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) kfree(isl6421);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) fe->sec_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) isl6421->is_off = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* install release callback */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) fe->ops.release_sec = isl6421_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* override frontend ops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) fe->ops.set_voltage = isl6421_set_voltage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (override_tone)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) fe->ops.set_tone = isl6421_set_tone;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return fe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) EXPORT_SYMBOL(isl6421_attach);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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