1/* 2 * driver for ENE KB3926 B/C/D/E/F CIR (also known as ENE0XXX) 3 * 4 * Copyright (C) 2010 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#include <linux/spinlock.h> 22 23 24/* hardware address */ 25#define ENE_STATUS 0 /* hardware status - unused */ 26#define ENE_ADDR_HI 1 /* hi byte of register address */ 27#define ENE_ADDR_LO 2 /* low byte of register address */ 28#define ENE_IO 3 /* read/write window */ 29#define ENE_IO_SIZE 4 30 31/* 8 bytes of samples, divided in 2 packets*/ 32#define ENE_FW_SAMPLE_BUFFER 0xF8F0 /* sample buffer */ 33#define ENE_FW_SAMPLE_SPACE 0x80 /* sample is space */ 34#define ENE_FW_PACKET_SIZE 4 35 36/* first firmware flag register */ 37#define ENE_FW1 0xF8F8 /* flagr */ 38#define ENE_FW1_ENABLE 0x01 /* enable fw processing */ 39#define ENE_FW1_TXIRQ 0x02 /* TX interrupt pending */ 40#define ENE_FW1_HAS_EXTRA_BUF 0x04 /* fw uses extra buffer*/ 41#define ENE_FW1_EXTRA_BUF_HND 0x08 /* extra buffer handshake bit*/ 42#define ENE_FW1_LED_ON 0x10 /* turn on a led */ 43 44#define ENE_FW1_WPATTERN 0x20 /* enable wake pattern */ 45#define ENE_FW1_WAKE 0x40 /* enable wake from S3 */ 46#define ENE_FW1_IRQ 0x80 /* enable interrupt */ 47 48/* second firmware flag register */ 49#define ENE_FW2 0xF8F9 /* flagw */ 50#define ENE_FW2_BUF_WPTR 0x01 /* which half of the buffer to read */ 51#define ENE_FW2_RXIRQ 0x04 /* RX IRQ pending*/ 52#define ENE_FW2_GP0A 0x08 /* Use GPIO0A for demodulated input */ 53#define ENE_FW2_EMMITER1_CONN 0x10 /* TX emmiter 1 connected */ 54#define ENE_FW2_EMMITER2_CONN 0x20 /* TX emmiter 2 connected */ 55 56#define ENE_FW2_FAN_INPUT 0x40 /* fan input used for demodulated data*/ 57#define ENE_FW2_LEARNING 0x80 /* hardware supports learning and TX */ 58 59/* firmware RX pointer for new style buffer */ 60#define ENE_FW_RX_POINTER 0xF8FA 61 62/* high parts of samples for fan input (8 samples)*/ 63#define ENE_FW_SMPL_BUF_FAN 0xF8FB 64#define ENE_FW_SMPL_BUF_FAN_PLS 0x8000 /* combined sample is pulse */ 65#define ENE_FW_SMPL_BUF_FAN_MSK 0x0FFF /* combined sample maximum value */ 66#define ENE_FW_SAMPLE_PERIOD_FAN 61 /* fan input has fixed sample period */ 67 68/* transmitter ports */ 69#define ENE_GPIOFS1 0xFC01 70#define ENE_GPIOFS1_GPIO0D 0x20 /* enable tx output on GPIO0D */ 71#define ENE_GPIOFS8 0xFC08 72#define ENE_GPIOFS8_GPIO41 0x02 /* enable tx output on GPIO40 */ 73 74/* IRQ registers block (for revision B) */ 75#define ENEB_IRQ 0xFD09 /* IRQ number */ 76#define ENEB_IRQ_UNK1 0xFD17 /* unknown setting = 1 */ 77#define ENEB_IRQ_STATUS 0xFD80 /* irq status */ 78#define ENEB_IRQ_STATUS_IR 0x20 /* IR irq */ 79 80/* fan as input settings */ 81#define ENE_FAN_AS_IN1 0xFE30 /* fan init reg 1 */ 82#define ENE_FAN_AS_IN1_EN 0xCD 83#define ENE_FAN_AS_IN2 0xFE31 /* fan init reg 2 */ 84#define ENE_FAN_AS_IN2_EN 0x03 85 86/* IRQ registers block (for revision C,D) */ 87#define ENE_IRQ 0xFE9B /* new irq settings register */ 88#define ENE_IRQ_MASK 0x0F /* irq number mask */ 89#define ENE_IRQ_UNK_EN 0x10 /* always enabled */ 90#define ENE_IRQ_STATUS 0x20 /* irq status and ACK */ 91 92/* CIR Config register #1 */ 93#define ENE_CIRCFG 0xFEC0 94#define ENE_CIRCFG_RX_EN 0x01 /* RX enable */ 95#define ENE_CIRCFG_RX_IRQ 0x02 /* Enable hardware interrupt */ 96#define ENE_CIRCFG_REV_POL 0x04 /* Input polarity reversed */ 97#define ENE_CIRCFG_CARR_DEMOD 0x08 /* Enable carrier demodulator */ 98 99#define ENE_CIRCFG_TX_EN 0x10 /* TX enable */ 100#define ENE_CIRCFG_TX_IRQ 0x20 /* Send interrupt on TX done */ 101#define ENE_CIRCFG_TX_POL_REV 0x40 /* TX polarity reversed */ 102#define ENE_CIRCFG_TX_CARR 0x80 /* send TX carrier or not */ 103 104/* CIR config register #2 */ 105#define ENE_CIRCFG2 0xFEC1 106#define ENE_CIRCFG2_RLC 0x00 107#define ENE_CIRCFG2_RC5 0x01 108#define ENE_CIRCFG2_RC6 0x02 109#define ENE_CIRCFG2_NEC 0x03 110#define ENE_CIRCFG2_CARR_DETECT 0x10 /* Enable carrier detection */ 111#define ENE_CIRCFG2_GPIO0A 0x20 /* Use GPIO0A instead of GPIO40 for input */ 112#define ENE_CIRCFG2_FAST_SAMPL1 0x40 /* Fast leading pulse detection for RC6 */ 113#define ENE_CIRCFG2_FAST_SAMPL2 0x80 /* Fast data detection for RC6 */ 114 115/* Knobs for protocol decoding - will document when/if will use them */ 116#define ENE_CIRPF 0xFEC2 117#define ENE_CIRHIGH 0xFEC3 118#define ENE_CIRBIT 0xFEC4 119#define ENE_CIRSTART 0xFEC5 120#define ENE_CIRSTART2 0xFEC6 121 122/* Actual register which contains RLC RX data - read by firmware */ 123#define ENE_CIRDAT_IN 0xFEC7 124 125 126/* RLC configuration - sample period (1us resulution) + idle mode */ 127#define ENE_CIRRLC_CFG 0xFEC8 128#define ENE_CIRRLC_CFG_OVERFLOW 0x80 /* interrupt on overflows if set */ 129#define ENE_DEFAULT_SAMPLE_PERIOD 50 130 131/* Two byte RLC TX buffer */ 132#define ENE_CIRRLC_OUT0 0xFEC9 133#define ENE_CIRRLC_OUT1 0xFECA 134#define ENE_CIRRLC_OUT_PULSE 0x80 /* Transmitted sample is pulse */ 135#define ENE_CIRRLC_OUT_MASK 0x7F 136 137 138/* Carrier detect setting 139 * Low nibble - number of carrier pulses to average 140 * High nibble - number of initial carrier pulses to discard 141 */ 142#define ENE_CIRCAR_PULS 0xFECB 143 144/* detected RX carrier period (resolution: 500 ns) */ 145#define ENE_CIRCAR_PRD 0xFECC 146#define ENE_CIRCAR_PRD_VALID 0x80 /* data valid content valid */ 147 148/* detected RX carrier pulse width (resolution: 500 ns) */ 149#define ENE_CIRCAR_HPRD 0xFECD 150 151/* TX period (resolution: 500 ns, minimum 2)*/ 152#define ENE_CIRMOD_PRD 0xFECE 153#define ENE_CIRMOD_PRD_POL 0x80 /* TX carrier polarity*/ 154 155#define ENE_CIRMOD_PRD_MAX 0x7F /* 15.87 kHz */ 156#define ENE_CIRMOD_PRD_MIN 0x02 /* 1 Mhz */ 157 158/* TX pulse width (resolution: 500 ns)*/ 159#define ENE_CIRMOD_HPRD 0xFECF 160 161/* Hardware versions */ 162#define ENE_ECHV 0xFF00 /* hardware revision */ 163#define ENE_PLLFRH 0xFF16 164#define ENE_PLLFRL 0xFF17 165#define ENE_DEFAULT_PLL_FREQ 1000 166 167#define ENE_ECSTS 0xFF1D 168#define ENE_ECSTS_RSRVD 0x04 169 170#define ENE_ECVER_MAJOR 0xFF1E /* chip version */ 171#define ENE_ECVER_MINOR 0xFF1F 172#define ENE_HW_VER_OLD 0xFD00 173 174/******************************************************************************/ 175 176#define ENE_DRIVER_NAME "ene_ir" 177 178#define ENE_IRQ_RX 1 179#define ENE_IRQ_TX 2 180 181#define ENE_HW_B 1 /* 3926B */ 182#define ENE_HW_C 2 /* 3926C */ 183#define ENE_HW_D 3 /* 3926D or later */ 184 185#define __dbg(level, format, ...) \ 186do { \ 187 if (debug >= level) \ 188 pr_info(format "\n", ## __VA_ARGS__); \ 189} while (0) 190 191#define dbg(format, ...) __dbg(1, format, ## __VA_ARGS__) 192#define dbg_verbose(format, ...) __dbg(2, format, ## __VA_ARGS__) 193#define dbg_regs(format, ...) __dbg(3, format, ## __VA_ARGS__) 194 195struct ene_device { 196 struct pnp_dev *pnp_dev; 197 struct rc_dev *rdev; 198 199 /* hw IO settings */ 200 long hw_io; 201 int irq; 202 spinlock_t hw_lock; 203 204 /* HW features */ 205 int hw_revision; /* hardware revision */ 206 bool hw_use_gpio_0a; /* gpio0a is demodulated input*/ 207 bool hw_extra_buffer; /* hardware has 'extra buffer' */ 208 bool hw_fan_input; /* fan input is IR data source */ 209 bool hw_learning_and_tx_capable; /* learning & tx capable */ 210 int pll_freq; 211 int buffer_len; 212 213 /* Extra RX buffer location */ 214 int extra_buf1_address; 215 int extra_buf1_len; 216 int extra_buf2_address; 217 int extra_buf2_len; 218 219 /* HW state*/ 220 int r_pointer; /* pointer to next sample to read */ 221 int w_pointer; /* pointer to next sample hw will write */ 222 bool rx_fan_input_inuse; /* is fan input in use for rx*/ 223 int tx_reg; /* current reg used for TX */ 224 u8 saved_conf1; /* saved FEC0 reg */ 225 unsigned int tx_sample; /* current sample for TX */ 226 bool tx_sample_pulse; /* current sample is pulse */ 227 228 /* TX buffer */ 229 unsigned *tx_buffer; /* input samples buffer*/ 230 int tx_pos; /* position in that buffer */ 231 int tx_len; /* current len of tx buffer */ 232 int tx_done; /* done transmitting */ 233 /* one more sample pending*/ 234 struct completion tx_complete; /* TX completion */ 235 struct timer_list tx_sim_timer; 236 237 /* TX settings */ 238 int tx_period; 239 int tx_duty_cycle; 240 int transmitter_mask; 241 242 /* RX settings */ 243 bool learning_mode_enabled; /* learning input enabled */ 244 bool carrier_detect_enabled; /* carrier detect enabled */ 245 int rx_period_adjust; 246 bool rx_enabled; 247}; 248 249static int ene_irq_status(struct ene_device *dev); 250static void ene_rx_read_hw_pointer(struct ene_device *dev); 251