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 #include <linux/spinlock.h> 17 18 19 /* hardware address */ 20 #define ENE_STATUS 0 /* hardware status - unused */ 21 #define ENE_ADDR_HI 1 /* hi byte of register address */ 22 #define ENE_ADDR_LO 2 /* low byte of register address */ 23 #define ENE_IO 3 /* read/write window */ 24 #define ENE_IO_SIZE 4 25 26 /* 8 bytes of samples, divided in 2 packets*/ 27 #define ENE_FW_SAMPLE_BUFFER 0xF8F0 /* sample buffer */ 28 #define ENE_FW_SAMPLE_SPACE 0x80 /* sample is space */ 29 #define ENE_FW_PACKET_SIZE 4 30 31 /* first firmware flag register */ 32 #define ENE_FW1 0xF8F8 /* flagr */ 33 #define ENE_FW1_ENABLE 0x01 /* enable fw processing */ 34 #define ENE_FW1_TXIRQ 0x02 /* TX interrupt pending */ 35 #define ENE_FW1_HAS_EXTRA_BUF 0x04 /* fw uses extra buffer*/ 36 #define ENE_FW1_EXTRA_BUF_HND 0x08 /* extra buffer handshake bit*/ 37 #define ENE_FW1_LED_ON 0x10 /* turn on a led */ 38 39 #define ENE_FW1_WPATTERN 0x20 /* enable wake pattern */ 40 #define ENE_FW1_WAKE 0x40 /* enable wake from S3 */ 41 #define ENE_FW1_IRQ 0x80 /* enable interrupt */ 42 43 /* second firmware flag register */ 44 #define ENE_FW2 0xF8F9 /* flagw */ 45 #define ENE_FW2_BUF_WPTR 0x01 /* which half of the buffer to read */ 46 #define ENE_FW2_RXIRQ 0x04 /* RX IRQ pending*/ 47 #define ENE_FW2_GP0A 0x08 /* Use GPIO0A for demodulated input */ 48 #define ENE_FW2_EMMITER1_CONN 0x10 /* TX emmiter 1 connected */ 49 #define ENE_FW2_EMMITER2_CONN 0x20 /* TX emmiter 2 connected */ 50 51 #define ENE_FW2_FAN_INPUT 0x40 /* fan input used for demodulated data*/ 52 #define ENE_FW2_LEARNING 0x80 /* hardware supports learning and TX */ 53 54 /* firmware RX pointer for new style buffer */ 55 #define ENE_FW_RX_POINTER 0xF8FA 56 57 /* high parts of samples for fan input (8 samples)*/ 58 #define ENE_FW_SMPL_BUF_FAN 0xF8FB 59 #define ENE_FW_SMPL_BUF_FAN_PLS 0x8000 /* combined sample is pulse */ 60 #define ENE_FW_SMPL_BUF_FAN_MSK 0x0FFF /* combined sample maximum value */ 61 #define ENE_FW_SAMPLE_PERIOD_FAN 61 /* fan input has fixed sample period */ 62 63 /* transmitter ports */ 64 #define ENE_GPIOFS1 0xFC01 65 #define ENE_GPIOFS1_GPIO0D 0x20 /* enable tx output on GPIO0D */ 66 #define ENE_GPIOFS8 0xFC08 67 #define ENE_GPIOFS8_GPIO41 0x02 /* enable tx output on GPIO40 */ 68 69 /* IRQ registers block (for revision B) */ 70 #define ENEB_IRQ 0xFD09 /* IRQ number */ 71 #define ENEB_IRQ_UNK1 0xFD17 /* unknown setting = 1 */ 72 #define ENEB_IRQ_STATUS 0xFD80 /* irq status */ 73 #define ENEB_IRQ_STATUS_IR 0x20 /* IR irq */ 74 75 /* fan as input settings */ 76 #define ENE_FAN_AS_IN1 0xFE30 /* fan init reg 1 */ 77 #define ENE_FAN_AS_IN1_EN 0xCD 78 #define ENE_FAN_AS_IN2 0xFE31 /* fan init reg 2 */ 79 #define ENE_FAN_AS_IN2_EN 0x03 80 81 /* IRQ registers block (for revision C,D) */ 82 #define ENE_IRQ 0xFE9B /* new irq settings register */ 83 #define ENE_IRQ_MASK 0x0F /* irq number mask */ 84 #define ENE_IRQ_UNK_EN 0x10 /* always enabled */ 85 #define ENE_IRQ_STATUS 0x20 /* irq status and ACK */ 86 87 /* CIR Config register #1 */ 88 #define ENE_CIRCFG 0xFEC0 89 #define ENE_CIRCFG_RX_EN 0x01 /* RX enable */ 90 #define ENE_CIRCFG_RX_IRQ 0x02 /* Enable hardware interrupt */ 91 #define ENE_CIRCFG_REV_POL 0x04 /* Input polarity reversed */ 92 #define ENE_CIRCFG_CARR_DEMOD 0x08 /* Enable carrier demodulator */ 93 94 #define ENE_CIRCFG_TX_EN 0x10 /* TX enable */ 95 #define ENE_CIRCFG_TX_IRQ 0x20 /* Send interrupt on TX done */ 96 #define ENE_CIRCFG_TX_POL_REV 0x40 /* TX polarity reversed */ 97 #define ENE_CIRCFG_TX_CARR 0x80 /* send TX carrier or not */ 98 99 /* CIR config register #2 */ 100 #define ENE_CIRCFG2 0xFEC1 101 #define ENE_CIRCFG2_RLC 0x00 102 #define ENE_CIRCFG2_RC5 0x01 103 #define ENE_CIRCFG2_RC6 0x02 104 #define ENE_CIRCFG2_NEC 0x03 105 #define ENE_CIRCFG2_CARR_DETECT 0x10 /* Enable carrier detection */ 106 #define ENE_CIRCFG2_GPIO0A 0x20 /* Use GPIO0A instead of GPIO40 for input */ 107 #define ENE_CIRCFG2_FAST_SAMPL1 0x40 /* Fast leading pulse detection for RC6 */ 108 #define ENE_CIRCFG2_FAST_SAMPL2 0x80 /* Fast data detection for RC6 */ 109 110 /* Knobs for protocol decoding - will document when/if will use them */ 111 #define ENE_CIRPF 0xFEC2 112 #define ENE_CIRHIGH 0xFEC3 113 #define ENE_CIRBIT 0xFEC4 114 #define ENE_CIRSTART 0xFEC5 115 #define ENE_CIRSTART2 0xFEC6 116 117 /* Actual register which contains RLC RX data - read by firmware */ 118 #define ENE_CIRDAT_IN 0xFEC7 119 120 121 /* RLC configuration - sample period (1us resulution) + idle mode */ 122 #define ENE_CIRRLC_CFG 0xFEC8 123 #define ENE_CIRRLC_CFG_OVERFLOW 0x80 /* interrupt on overflows if set */ 124 #define ENE_DEFAULT_SAMPLE_PERIOD 50 125 126 /* Two byte RLC TX buffer */ 127 #define ENE_CIRRLC_OUT0 0xFEC9 128 #define ENE_CIRRLC_OUT1 0xFECA 129 #define ENE_CIRRLC_OUT_PULSE 0x80 /* Transmitted sample is pulse */ 130 #define ENE_CIRRLC_OUT_MASK 0x7F 131 132 133 /* Carrier detect setting 134 * Low nibble - number of carrier pulses to average 135 * High nibble - number of initial carrier pulses to discard 136 */ 137 #define ENE_CIRCAR_PULS 0xFECB 138 139 /* detected RX carrier period (resolution: 500 ns) */ 140 #define ENE_CIRCAR_PRD 0xFECC 141 #define ENE_CIRCAR_PRD_VALID 0x80 /* data valid content valid */ 142 143 /* detected RX carrier pulse width (resolution: 500 ns) */ 144 #define ENE_CIRCAR_HPRD 0xFECD 145 146 /* TX period (resolution: 500 ns, minimum 2)*/ 147 #define ENE_CIRMOD_PRD 0xFECE 148 #define ENE_CIRMOD_PRD_POL 0x80 /* TX carrier polarity*/ 149 150 #define ENE_CIRMOD_PRD_MAX 0x7F /* 15.87 kHz */ 151 #define ENE_CIRMOD_PRD_MIN 0x02 /* 1 Mhz */ 152 153 /* TX pulse width (resolution: 500 ns)*/ 154 #define ENE_CIRMOD_HPRD 0xFECF 155 156 /* Hardware versions */ 157 #define ENE_ECHV 0xFF00 /* hardware revision */ 158 #define ENE_PLLFRH 0xFF16 159 #define ENE_PLLFRL 0xFF17 160 #define ENE_DEFAULT_PLL_FREQ 1000 161 162 #define ENE_ECSTS 0xFF1D 163 #define ENE_ECSTS_RSRVD 0x04 164 165 #define ENE_ECVER_MAJOR 0xFF1E /* chip version */ 166 #define ENE_ECVER_MINOR 0xFF1F 167 #define ENE_HW_VER_OLD 0xFD00 168 169 /******************************************************************************/ 170 171 #define ENE_DRIVER_NAME "ene_ir" 172 173 #define ENE_IRQ_RX 1 174 #define ENE_IRQ_TX 2 175 176 #define ENE_HW_B 1 /* 3926B */ 177 #define ENE_HW_C 2 /* 3926C */ 178 #define ENE_HW_D 3 /* 3926D or later */ 179 180 #define __dbg(level, format, ...) \ 181 do { \ 182 if (debug >= level) \ 183 pr_info(format "\n", ## __VA_ARGS__); \ 184 } while (0) 185 186 #define dbg(format, ...) __dbg(1, format, ## __VA_ARGS__) 187 #define dbg_verbose(format, ...) __dbg(2, format, ## __VA_ARGS__) 188 #define dbg_regs(format, ...) __dbg(3, format, ## __VA_ARGS__) 189 190 struct ene_device { 191 struct pnp_dev *pnp_dev; 192 struct rc_dev *rdev; 193 194 /* hw IO settings */ 195 long hw_io; 196 int irq; 197 spinlock_t hw_lock; 198 199 /* HW features */ 200 int hw_revision; /* hardware revision */ 201 bool hw_use_gpio_0a; /* gpio0a is demodulated input*/ 202 bool hw_extra_buffer; /* hardware has 'extra buffer' */ 203 bool hw_fan_input; /* fan input is IR data source */ 204 bool hw_learning_and_tx_capable; /* learning & tx capable */ 205 int pll_freq; 206 int buffer_len; 207 208 /* Extra RX buffer location */ 209 int extra_buf1_address; 210 int extra_buf1_len; 211 int extra_buf2_address; 212 int extra_buf2_len; 213 214 /* HW state*/ 215 int r_pointer; /* pointer to next sample to read */ 216 int w_pointer; /* pointer to next sample hw will write */ 217 bool rx_fan_input_inuse; /* is fan input in use for rx*/ 218 int tx_reg; /* current reg used for TX */ 219 u8 saved_conf1; /* saved FEC0 reg */ 220 unsigned int tx_sample; /* current sample for TX */ 221 bool tx_sample_pulse; /* current sample is pulse */ 222 223 /* TX buffer */ 224 unsigned *tx_buffer; /* input samples buffer*/ 225 int tx_pos; /* position in that buffer */ 226 int tx_len; /* current len of tx buffer */ 227 int tx_done; /* done transmitting */ 228 /* one more sample pending*/ 229 struct completion tx_complete; /* TX completion */ 230 struct timer_list tx_sim_timer; 231 232 /* TX settings */ 233 int tx_period; 234 int tx_duty_cycle; 235 int transmitter_mask; 236 237 /* RX settings */ 238 bool learning_mode_enabled; /* learning input enabled */ 239 bool carrier_detect_enabled; /* carrier detect enabled */ 240 int rx_period_adjust; 241 bool rx_enabled; 242 }; 243 244 static int ene_irq_status(struct ene_device *dev); 245 static void ene_rx_read_hw_pointer(struct ene_device *dev); 246