drivers/media/rc/ene_ir.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * driver for ENE KB3926 B/C/D/E/F CIR (also known as ENE0XXX)
   4  *
   5  * Copyright (C) 2010 Maxim Levitsky <maximlevitsky@gmail.com>
   6  */
   7 #include <linux/spinlock.h>
   8
   9
  10 /* hardware address */
  11 #define ENE_STATUS              0       /* hardware status - unused */
  12 #define ENE_ADDR_HI             1       /* hi byte of register address */
  13 #define ENE_ADDR_LO             2       /* low byte of register address */
  14 #define ENE_IO                  3       /* read/write window */
  15 #define ENE_IO_SIZE             4
  16
  17 /* 8 bytes of samples, divided in 2 packets*/
  18 #define ENE_FW_SAMPLE_BUFFER    0xF8F0  /* sample buffer */
  19 #define ENE_FW_SAMPLE_SPACE     0x80    /* sample is space */
  20 #define ENE_FW_PACKET_SIZE      4
  21
  22 /* first firmware flag register */
  23 #define ENE_FW1                 0xF8F8  /* flagr */
  24 #define ENE_FW1_ENABLE          0x01    /* enable fw processing */
  25 #define ENE_FW1_TXIRQ           0x02    /* TX interrupt pending */
  26 #define ENE_FW1_HAS_EXTRA_BUF   0x04    /* fw uses extra buffer*/
  27 #define ENE_FW1_EXTRA_BUF_HND   0x08    /* extra buffer handshake bit*/
  28 #define ENE_FW1_LED_ON          0x10    /* turn on a led */
  29
  30 #define ENE_FW1_WPATTERN        0x20    /* enable wake pattern */
  31 #define ENE_FW1_WAKE            0x40    /* enable wake from S3 */
  32 #define ENE_FW1_IRQ             0x80    /* enable interrupt */
  33
  34 /* second firmware flag register */
  35 #define ENE_FW2                 0xF8F9  /* flagw */
  36 #define ENE_FW2_BUF_WPTR        0x01    /* which half of the buffer to read */
  37 #define ENE_FW2_RXIRQ           0x04    /* RX IRQ pending*/
  38 #define ENE_FW2_GP0A            0x08    /* Use GPIO0A for demodulated input */
  39 #define ENE_FW2_EMMITER1_CONN   0x10    /* TX emmiter 1 connected */
  40 #define ENE_FW2_EMMITER2_CONN   0x20    /* TX emmiter 2 connected */
  41
  42 #define ENE_FW2_FAN_INPUT       0x40    /* fan input used for demodulated data*/
  43 #define ENE_FW2_LEARNING        0x80    /* hardware supports learning and TX */
  44
  45 /* firmware RX pointer for new style buffer */
  46 #define ENE_FW_RX_POINTER       0xF8FA
  47
  48 /* high parts of samples for fan input (8 samples)*/
  49 #define ENE_FW_SMPL_BUF_FAN     0xF8FB
  50 #define ENE_FW_SMPL_BUF_FAN_PLS 0x8000  /* combined sample is pulse */
  51 #define ENE_FW_SMPL_BUF_FAN_MSK 0x0FFF  /* combined sample maximum value */
  52 #define ENE_FW_SAMPLE_PERIOD_FAN 61     /* fan input has fixed sample period */
  53
  54 /* transmitter ports */
  55 #define ENE_GPIOFS1             0xFC01
  56 #define ENE_GPIOFS1_GPIO0D      0x20    /* enable tx output on GPIO0D */
  57 #define ENE_GPIOFS8             0xFC08
  58 #define ENE_GPIOFS8_GPIO41      0x02    /* enable tx output on GPIO40 */
  59
  60 /* IRQ registers block (for revision B) */
  61 #define ENEB_IRQ                0xFD09  /* IRQ number */
  62 #define ENEB_IRQ_UNK1           0xFD17  /* unknown setting = 1 */
  63 #define ENEB_IRQ_STATUS         0xFD80  /* irq status */
  64 #define ENEB_IRQ_STATUS_IR      0x20    /* IR irq */
  65
  66 /* fan as input settings */
  67 #define ENE_FAN_AS_IN1          0xFE30  /* fan init reg 1 */
  68 #define ENE_FAN_AS_IN1_EN       0xCD
  69 #define ENE_FAN_AS_IN2          0xFE31  /* fan init reg 2 */
  70 #define ENE_FAN_AS_IN2_EN       0x03
  71
  72 /* IRQ registers block (for revision C,D) */
  73 #define ENE_IRQ                 0xFE9B  /* new irq settings register */
  74 #define ENE_IRQ_MASK            0x0F    /* irq number mask */
  75 #define ENE_IRQ_UNK_EN          0x10    /* always enabled */
  76 #define ENE_IRQ_STATUS          0x20    /* irq status and ACK */
  77
  78 /* CIR Config register #1 */
  79 #define ENE_CIRCFG              0xFEC0
  80 #define ENE_CIRCFG_RX_EN        0x01    /* RX enable */
  81 #define ENE_CIRCFG_RX_IRQ       0x02    /* Enable hardware interrupt */
  82 #define ENE_CIRCFG_REV_POL      0x04    /* Input polarity reversed */
  83 #define ENE_CIRCFG_CARR_DEMOD   0x08    /* Enable carrier demodulator */
  84
  85 #define ENE_CIRCFG_TX_EN        0x10    /* TX enable */
  86 #define ENE_CIRCFG_TX_IRQ       0x20    /* Send interrupt on TX done */
  87 #define ENE_CIRCFG_TX_POL_REV   0x40    /* TX polarity reversed */
  88 #define ENE_CIRCFG_TX_CARR      0x80    /* send TX carrier or not */
  89
  90 /* CIR config register #2 */
  91 #define ENE_CIRCFG2             0xFEC1
  92 #define ENE_CIRCFG2_RLC         0x00
  93 #define ENE_CIRCFG2_RC5         0x01
  94 #define ENE_CIRCFG2_RC6         0x02
  95 #define ENE_CIRCFG2_NEC         0x03
  96 #define ENE_CIRCFG2_CARR_DETECT 0x10    /* Enable carrier detection */
  97 #define ENE_CIRCFG2_GPIO0A      0x20    /* Use GPIO0A instead of GPIO40 for input */
  98 #define ENE_CIRCFG2_FAST_SAMPL1 0x40    /* Fast leading pulse detection for RC6 */
  99 #define ENE_CIRCFG2_FAST_SAMPL2 0x80    /* Fast data detection for RC6 */
 100
 101 /* Knobs for protocol decoding - will document when/if will use them */
 102 #define ENE_CIRPF               0xFEC2
 103 #define ENE_CIRHIGH             0xFEC3
 104 #define ENE_CIRBIT              0xFEC4
 105 #define ENE_CIRSTART            0xFEC5
 106 #define ENE_CIRSTART2           0xFEC6
 107
 108 /* Actual register which contains RLC RX data - read by firmware */
 109 #define ENE_CIRDAT_IN           0xFEC7
 110
 111
 112 /* RLC configuration - sample period (1us resolution) + idle mode */
 113 #define ENE_CIRRLC_CFG          0xFEC8
 114 #define ENE_CIRRLC_CFG_OVERFLOW 0x80    /* interrupt on overflows if set */
 115 #define ENE_DEFAULT_SAMPLE_PERIOD 50
 116
 117 /* Two byte RLC TX buffer */
 118 #define ENE_CIRRLC_OUT0         0xFEC9
 119 #define ENE_CIRRLC_OUT1         0xFECA
 120 #define ENE_CIRRLC_OUT_PULSE    0x80    /* Transmitted sample is pulse */
 121 #define ENE_CIRRLC_OUT_MASK     0x7F
 122
 123
 124 /* Carrier detect setting
 125  * Low nibble  - number of carrier pulses to average
 126  * High nibble - number of initial carrier pulses to discard
 127  */
 128 #define ENE_CIRCAR_PULS         0xFECB
 129
 130 /* detected RX carrier period (resolution: 500 ns) */
 131 #define ENE_CIRCAR_PRD          0xFECC
 132 #define ENE_CIRCAR_PRD_VALID    0x80    /* data valid content valid */
 133
 134 /* detected RX carrier pulse width (resolution: 500 ns) */
 135 #define ENE_CIRCAR_HPRD         0xFECD
 136
 137 /* TX period (resolution: 500 ns, minimum 2)*/
 138 #define ENE_CIRMOD_PRD          0xFECE
 139 #define ENE_CIRMOD_PRD_POL      0x80    /* TX carrier polarity*/
 140
 141 #define ENE_CIRMOD_PRD_MAX      0x7F    /* 15.87 kHz */
 142 #define ENE_CIRMOD_PRD_MIN      0x02    /* 1 Mhz */
 143
 144 /* TX pulse width (resolution: 500 ns)*/
 145 #define ENE_CIRMOD_HPRD         0xFECF
 146
 147 /* Hardware versions */
 148 #define ENE_ECHV                0xFF00  /* hardware revision */
 149 #define ENE_PLLFRH              0xFF16
 150 #define ENE_PLLFRL              0xFF17
 151 #define ENE_DEFAULT_PLL_FREQ    1000
 152
 153 #define ENE_ECSTS               0xFF1D
 154 #define ENE_ECSTS_RSRVD         0x04
 155
 156 #define ENE_ECVER_MAJOR         0xFF1E  /* chip version */
 157 #define ENE_ECVER_MINOR         0xFF1F
 158 #define ENE_HW_VER_OLD          0xFD00
 159
 160 /******************************************************************************/
 161
 162 #define ENE_DRIVER_NAME         "ene_ir"
 163
 164 #define ENE_IRQ_RX              1
 165 #define ENE_IRQ_TX              2
 166
 167 #define  ENE_HW_B               1       /* 3926B */
 168 #define  ENE_HW_C               2       /* 3926C */
 169 #define  ENE_HW_D               3       /* 3926D or later */
 170
 171 #define __dbg(level, format, ...)                               \
 172 do {                                                            \
 173         if (debug >= level)                                     \
 174                 pr_info(format "\n", ## __VA_ARGS__);           \
 175 } while (0)
 176
 177 #define dbg(format, ...)                __dbg(1, format, ## __VA_ARGS__)
 178 #define dbg_verbose(format, ...)        __dbg(2, format, ## __VA_ARGS__)
 179 #define dbg_regs(format, ...)           __dbg(3, format, ## __VA_ARGS__)
 180
 181 struct ene_device {
 182         struct pnp_dev *pnp_dev;
 183         struct rc_dev *rdev;
 184
 185         /* hw IO settings */
 186         long hw_io;
 187         int irq;
 188         spinlock_t hw_lock;
 189
 190         /* HW features */
 191         int hw_revision;                        /* hardware revision */
 192         bool hw_use_gpio_0a;                    /* gpio0a is demodulated input*/
 193         bool hw_extra_buffer;                   /* hardware has 'extra buffer' */
 194         bool hw_fan_input;                      /* fan input is IR data source */
 195         bool hw_learning_and_tx_capable;        /* learning & tx capable */
 196         int  pll_freq;
 197         int buffer_len;
 198
 199         /* Extra RX buffer location */
 200         int extra_buf1_address;
 201         int extra_buf1_len;
 202         int extra_buf2_address;
 203         int extra_buf2_len;
 204
 205         /* HW state*/
 206         int r_pointer;                          /* pointer to next sample to read */
 207         int w_pointer;                          /* pointer to next sample hw will write */
 208         bool rx_fan_input_inuse;                /* is fan input in use for rx*/
 209         int tx_reg;                             /* current reg used for TX */
 210         u8  saved_conf1;                        /* saved FEC0 reg */
 211         unsigned int tx_sample;                 /* current sample for TX */
 212         bool tx_sample_pulse;                   /* current sample is pulse */
 213
 214         /* TX buffer */
 215         unsigned *tx_buffer;                    /* input samples buffer*/
 216         int tx_pos;                             /* position in that buffer */
 217         int tx_len;                             /* current len of tx buffer */
 218         int tx_done;                            /* done transmitting */
 219                                                 /* one more sample pending*/
 220         struct completion tx_complete;          /* TX completion */
 221         struct timer_list tx_sim_timer;
 222
 223         /* TX settings */
 224         int tx_period;
 225         int tx_duty_cycle;
 226         int transmitter_mask;
 227
 228         /* RX settings */
 229         bool learning_mode_enabled;             /* learning input enabled */
 230         bool carrier_detect_enabled;            /* carrier detect enabled */
 231         int rx_period_adjust;
 232         bool rx_enabled;
 233 };
 234
 235 static int ene_irq_status(struct ene_device *dev);
 236 static void ene_rx_read_hw_pointer(struct ene_device *dev);