1/* 2 * driver for ENE KB3926 B/C/D CIR (also known as ENE0100) 3 * 4 * Copyright (C) 2009 Maxim Levitsky <maximlevitsky@gmail.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of the 9 * License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 19 * USA 20 */ 21 22#include <media/lirc.h> 23#include <media/lirc_dev.h> 24 25/* hardware address */ 26#define ENE_STATUS 0 /* hardware status - unused */ 27#define ENE_ADDR_HI 1 /* hi byte of register address */ 28#define ENE_ADDR_LO 2 /* low byte of register address */ 29#define ENE_IO 3 /* read/write window */ 30#define ENE_MAX_IO 4 31 32/* 8 bytes of samples, divided in 2 halfs*/ 33#define ENE_SAMPLE_BUFFER 0xF8F0 /* regular sample buffer */ 34#define ENE_SAMPLE_SPC_MASK (1 << 7) /* sample is space */ 35#define ENE_SAMPLE_VALUE_MASK 0x7F 36#define ENE_SAMPLE_OVERFLOW 0x7F 37#define ENE_SAMPLES_SIZE 4 38 39/* fan input sample buffer */ 40#define ENE_SAMPLE_BUFFER_FAN 0xF8FB /* this buffer holds high byte of */ 41 /* each sample of normal buffer */ 42 43#define ENE_FAN_SMPL_PULS_MSK 0x8000 /* this bit of combined sample */ 44 /* if set, says that sample is pulse */ 45#define ENE_FAN_VALUE_MASK 0x0FFF /* mask for valid bits of the value */ 46 47/* first firmware register */ 48#define ENE_FW1 0xF8F8 49#define ENE_FW1_ENABLE (1 << 0) /* enable fw processing */ 50#define ENE_FW1_TXIRQ (1 << 1) /* TX interrupt pending */ 51#define ENE_FW1_WAKE (1 << 6) /* enable wake from S3 */ 52#define ENE_FW1_IRQ (1 << 7) /* enable interrupt */ 53 54/* second firmware register */ 55#define ENE_FW2 0xF8F9 56#define ENE_FW2_BUF_HIGH (1 << 0) /* which half of the buffer to read */ 57#define ENE_FW2_IRQ_CLR (1 << 2) /* clear this on IRQ */ 58#define ENE_FW2_GP40_AS_LEARN (1 << 4) /* normal input is used as */ 59 /* learning input */ 60#define ENE_FW2_FAN_AS_NRML_IN (1 << 6) /* fan is used as normal input */ 61#define ENE_FW2_LEARNING (1 << 7) /* hardware supports learning and TX */ 62 63/* fan as input settings - only if learning capable */ 64#define ENE_FAN_AS_IN1 0xFE30 /* fan init reg 1 */ 65#define ENE_FAN_AS_IN1_EN 0xCD 66#define ENE_FAN_AS_IN2 0xFE31 /* fan init reg 2 */ 67#define ENE_FAN_AS_IN2_EN 0x03 68#define ENE_SAMPLE_PERIOD_FAN 61 /* fan input has fixed sample period */ 69 70/* IRQ registers block (for revision B) */ 71#define ENEB_IRQ 0xFD09 /* IRQ number */ 72#define ENEB_IRQ_UNK1 0xFD17 /* unknown setting = 1 */ 73#define ENEB_IRQ_STATUS 0xFD80 /* irq status */ 74#define ENEB_IRQ_STATUS_IR (1 << 5) /* IR irq */ 75 76/* IRQ registers block (for revision C,D) */ 77#define ENEC_IRQ 0xFE9B /* new irq settings register */ 78#define ENEC_IRQ_MASK 0x0F /* irq number mask */ 79#define ENEC_IRQ_UNK_EN (1 << 4) /* always enabled */ 80#define ENEC_IRQ_STATUS (1 << 5) /* irq status and ACK */ 81 82/* CIR block settings */ 83#define ENE_CIR_CONF1 0xFEC0 84#define ENE_CIR_CONF1_ADC_ON 0x7 /* reciever on gpio40 enabled */ 85#define ENE_CIR_CONF1_LEARN1 (1 << 3) /* enabled on learning mode */ 86#define ENE_CIR_CONF1_TX_ON 0x30 /* enabled on transmit */ 87#define ENE_CIR_CONF1_TX_CARR (1 << 7) /* send TX carrier or not */ 88 89#define ENE_CIR_CONF2 0xFEC1 /* unknown setting = 0 */ 90#define ENE_CIR_CONF2_LEARN2 (1 << 4) /* set on enable learning */ 91#define ENE_CIR_CONF2_GPIO40DIS (1 << 5) /* disable normal input via gpio40 */ 92 93#define ENE_CIR_SAMPLE_PERIOD 0xFEC8 /* sample period in us */ 94#define ENE_CIR_SAMPLE_OVERFLOW (1 << 7) /* interrupt on overflows if set */ 95 96 97/* transmitter - not implemented yet */ 98/* KB3926C and higher */ 99/* transmission is very similiar to recieving, a byte is written to */ 100/* ENE_TX_INPUT, in same manner as it is read from sample buffer */ 101/* sample period is fixed*/ 102 103 104/* transmitter ports */ 105#define ENE_TX_PORT1 0xFC01 /* this enables one or both */ 106#define ENE_TX_PORT1_EN (1 << 5) /* TX ports */ 107#define ENE_TX_PORT2 0xFC08 108#define ENE_TX_PORT2_EN (1 << 1) 109 110#define ENE_TX_INPUT 0xFEC9 /* next byte to transmit */ 111#define ENE_TX_SPC_MASK (1 << 7) /* Transmitted sample is space */ 112#define ENE_TX_UNK1 0xFECB /* set to 0x63 */ 113#define ENE_TX_SMPL_PERIOD 50 /* transmit sample period */ 114 115 116#define ENE_TX_CARRIER 0xFECE /* TX carrier * 2 (khz) */ 117#define ENE_TX_CARRIER_UNKBIT 0x80 /* This bit set on transmit */ 118#define ENE_TX_CARRIER_LOW 0xFECF /* TX carrier / 2 */ 119 120/* Hardware versions */ 121#define ENE_HW_VERSION 0xFF00 /* hardware revision */ 122#define ENE_HW_UNK 0xFF1D 123#define ENE_HW_UNK_CLR (1 << 2) 124#define ENE_HW_VER_MAJOR 0xFF1E /* chip version */ 125#define ENE_HW_VER_MINOR 0xFF1F 126#define ENE_HW_VER_OLD 0xFD00 127 128#define same_sign(a, b) ((((a) > 0) && (b) > 0) || ((a) < 0 && (b) < 0)) 129 130#define ENE_DRIVER_NAME "enecir" 131#define ENE_MAXGAP 250000 /* this is amount of time we wait 132 before turning the sampler, chosen 133 arbitry */ 134 135#define space(len) (-(len)) /* add a space */ 136 137/* software defines */ 138#define ENE_IRQ_RX 1 139#define ENE_IRQ_TX 2 140 141#define ENE_HW_B 1 /* 3926B */ 142#define ENE_HW_C 2 /* 3926C */ 143#define ENE_HW_D 3 /* 3926D */ 144 145#define ene_printk(level, text, ...) \ 146 printk(level ENE_DRIVER_NAME ": " text, ## __VA_ARGS__) 147 148struct ene_device { 149 struct pnp_dev *pnp_dev; 150 struct lirc_driver *lirc_driver; 151 152 /* hw settings */ 153 unsigned long hw_io; 154 int irq; 155 156 int hw_revision; /* hardware revision */ 157 int hw_learning_and_tx_capable; /* learning capable */ 158 int hw_gpio40_learning; /* gpio40 is learning */ 159 int hw_fan_as_normal_input; /* fan input is used as regular input */ 160 161 /* device data */ 162 int idle; 163 int fan_input_inuse; 164 165 int sample; 166 int in_use; 167 168 struct timeval gap_start; 169}; 170