drivers/media/rc/fintek-cir.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Driver for Feature Integration Technology Inc. (aka Fintek) LPC CIR
   4  *
   5  * Copyright (C) 2011 Jarod Wilson <jarod@redhat.com>
   6  *
   7  * Special thanks to Fintek for providing hardware and spec sheets.
   8  * This driver is based upon the nuvoton, ite and ene drivers for
   9  * similar hardware.
  10  */
  11
  12 #include <linux/spinlock.h>
  13 #include <linux/ioctl.h>
  14
  15 /* platform driver name to register */
  16 #define FINTEK_DRIVER_NAME      "fintek-cir"
  17 #define FINTEK_DESCRIPTION      "Fintek LPC SuperIO Consumer IR Transceiver"
  18 #define VENDOR_ID_FINTEK        0x1934
  19
  20
  21 /* debugging module parameter */
  22 static int debug;
  23
  24 #define fit_pr(level, text, ...) \
  25         printk(level KBUILD_MODNAME ": " text, ## __VA_ARGS__)
  26
  27 #define fit_dbg(text, ...) \
  28         if (debug) \
  29                 printk(KERN_DEBUG \
  30                         KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
  31
  32 #define fit_dbg_verbose(text, ...) \
  33         if (debug > 1) \
  34                 printk(KERN_DEBUG \
  35                         KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
  36
  37 #define fit_dbg_wake(text, ...) \
  38         if (debug > 2) \
  39                 printk(KERN_DEBUG \
  40                         KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
  41
  42
  43 #define TX_BUF_LEN 256
  44 #define RX_BUF_LEN 32
  45
  46 struct fintek_dev {
  47         struct pnp_dev *pdev;
  48         struct rc_dev *rdev;
  49
  50         spinlock_t fintek_lock;
  51
  52         /* for rx */
  53         u8 buf[RX_BUF_LEN];
  54         unsigned int pkts;
  55
  56         struct {
  57                 spinlock_t lock;
  58                 u8 buf[TX_BUF_LEN];
  59                 unsigned int buf_count;
  60                 unsigned int cur_buf_num;
  61                 wait_queue_head_t queue;
  62         } tx;
  63
  64         /* Config register index/data port pair */
  65         u32 cr_ip;
  66         u32 cr_dp;
  67
  68         /* hardware I/O settings */
  69         unsigned long cir_addr;
  70         int cir_irq;
  71         int cir_port_len;
  72
  73         /* hardware id */
  74         u8 chip_major;
  75         u8 chip_minor;
  76         u16 chip_vendor;
  77         u8 logical_dev_cir;
  78
  79         /* hardware features */
  80         bool hw_learning_capable;
  81         bool hw_tx_capable;
  82
  83         /* rx settings */
  84         bool learning_enabled;
  85         bool carrier_detect_enabled;
  86
  87         enum {
  88                 CMD_HEADER = 0,
  89                 SUBCMD,
  90                 CMD_DATA,
  91                 PARSE_IRDATA,
  92         } parser_state;
  93
  94         u8 cmd, rem;
  95
  96         /* carrier period = 1 / frequency */
  97         u32 carrier;
  98 };
  99
 100 /* buffer packet constants, largely identical to mceusb.c */
 101 #define BUF_PULSE_BIT           0x80
 102 #define BUF_LEN_MASK            0x1f
 103 #define BUF_SAMPLE_MASK         0x7f
 104
 105 #define BUF_COMMAND_HEADER      0x9f
 106 #define BUF_COMMAND_MASK        0xe0
 107 #define BUF_COMMAND_NULL        0x00
 108 #define BUF_HW_CMD_HEADER       0xff
 109 #define BUF_CMD_G_REVISION      0x0b
 110 #define BUF_CMD_S_CARRIER       0x06
 111 #define BUF_CMD_S_TIMEOUT       0x0c
 112 #define BUF_CMD_SIG_END         0x01
 113 #define BUF_CMD_S_TXMASK        0x08
 114 #define BUF_CMD_S_RXSENSOR      0x14
 115 #define BUF_RSP_PULSE_COUNT     0x15
 116
 117 #define CIR_SAMPLE_PERIOD       50
 118
 119 /*
 120  * Configuration Register:
 121  *  Index Port
 122  *  Data Port
 123  */
 124 #define CR_INDEX_PORT           0x2e
 125 #define CR_DATA_PORT            0x2f
 126
 127 /* Possible alternate values, depends on how the chip is wired */
 128 #define CR_INDEX_PORT2          0x4e
 129 #define CR_DATA_PORT2           0x4f
 130
 131 /*
 132  * GCR_CONFIG_PORT_SEL bit 4 specifies which Index Port value is
 133  * active. 1 = 0x4e, 0 = 0x2e
 134  */
 135 #define PORT_SEL_PORT_4E_EN     0x10
 136
 137 /* Extended Function Mode enable/disable magic values */
 138 #define CONFIG_REG_ENABLE       0x87
 139 #define CONFIG_REG_DISABLE      0xaa
 140
 141 /* Chip IDs found in CR_CHIP_ID_{HI,LO} */
 142 #define CHIP_ID_HIGH_F71809U    0x04
 143 #define CHIP_ID_LOW_F71809U     0x08
 144
 145 /*
 146  * Global control regs we need to care about:
 147  *      Global Control                  def.
 148  *      Register name           addr    val. */
 149 #define GCR_SOFTWARE_RESET      0x02 /* 0x00 */
 150 #define GCR_LOGICAL_DEV_NO      0x07 /* 0x00 */
 151 #define GCR_CHIP_ID_HI          0x20 /* 0x04 */
 152 #define GCR_CHIP_ID_LO          0x21 /* 0x08 */
 153 #define GCR_VENDOR_ID_HI        0x23 /* 0x19 */
 154 #define GCR_VENDOR_ID_LO        0x24 /* 0x34 */
 155 #define GCR_CONFIG_PORT_SEL     0x25 /* 0x01 */
 156 #define GCR_KBMOUSE_WAKEUP      0x27
 157
 158 #define LOGICAL_DEV_DISABLE     0x00
 159 #define LOGICAL_DEV_ENABLE      0x01
 160
 161 /* Logical device number of the CIR function */
 162 #define LOGICAL_DEV_CIR_REV1    0x05
 163 #define LOGICAL_DEV_CIR_REV2    0x08
 164
 165 /* CIR Logical Device (LDN 0x08) config registers */
 166 #define CIR_CR_COMMAND_INDEX    0x04
 167 #define CIR_CR_IRCS             0x05 /* Before host writes command to IR, host
 168                                         must set to 1. When host finshes write
 169                                         command to IR, host must clear to 0. */
 170 #define CIR_CR_COMMAND_DATA     0x06 /* Host read or write command data */
 171 #define CIR_CR_CLASS            0x07 /* 0xff = rx-only, 0x66 = rx + 2 tx,
 172                                         0x33 = rx + 1 tx */
 173 #define CIR_CR_DEV_EN           0x30 /* bit0 = 1 enables CIR */
 174 #define CIR_CR_BASE_ADDR_HI     0x60 /* MSB of CIR IO base addr */
 175 #define CIR_CR_BASE_ADDR_LO     0x61 /* LSB of CIR IO base addr */
 176 #define CIR_CR_IRQ_SEL          0x70 /* bits3-0 store CIR IRQ */
 177 #define CIR_CR_PSOUT_STATUS     0xf1
 178 #define CIR_CR_WAKE_KEY3_ADDR   0xf8
 179 #define CIR_CR_WAKE_KEY3_CODE   0xf9
 180 #define CIR_CR_WAKE_KEY3_DC     0xfa
 181 #define CIR_CR_WAKE_CONTROL     0xfb
 182 #define CIR_CR_WAKE_KEY12_ADDR  0xfc
 183 #define CIR_CR_WAKE_KEY4_ADDR   0xfd
 184 #define CIR_CR_WAKE_KEY5_ADDR   0xfe
 185
 186 #define CLASS_RX_ONLY           0xff
 187 #define CLASS_RX_2TX            0x66
 188 #define CLASS_RX_1TX            0x33
 189
 190 /* CIR device registers */
 191 #define CIR_STATUS              0x00
 192 #define CIR_RX_DATA             0x01
 193 #define CIR_TX_CONTROL          0x02
 194 #define CIR_TX_DATA             0x03
 195 #define CIR_CONTROL             0x04
 196
 197 /* Bits to enable CIR wake */
 198 #define LOGICAL_DEV_ACPI        0x01
 199 #define LDEV_ACPI_WAKE_EN_REG   0xe8
 200 #define ACPI_WAKE_EN_CIR_BIT    0x04
 201
 202 #define LDEV_ACPI_PME_EN_REG    0xf0
 203 #define LDEV_ACPI_PME_CLR_REG   0xf1
 204 #define ACPI_PME_CIR_BIT        0x02
 205
 206 #define LDEV_ACPI_STATE_REG     0xf4
 207 #define ACPI_STATE_CIR_BIT      0x20
 208
 209 /*
 210  * CIR status register (0x00):
 211  *   7 - CIR_IRQ_EN (1 = enable CIR IRQ, 0 = disable)
 212  *   3 - TX_FINISH (1 when TX finished, write 1 to clear)
 213  *   2 - TX_UNDERRUN (1 on TX underrun, write 1 to clear)
 214  *   1 - RX_TIMEOUT (1 on RX timeout, write 1 to clear)
 215  *   0 - RX_RECEIVE (1 on RX receive, write 1 to clear)
 216  */
 217 #define CIR_STATUS_IRQ_EN       0x80
 218 #define CIR_STATUS_TX_FINISH    0x08
 219 #define CIR_STATUS_TX_UNDERRUN  0x04
 220 #define CIR_STATUS_RX_TIMEOUT   0x02
 221 #define CIR_STATUS_RX_RECEIVE   0x01
 222 #define CIR_STATUS_IRQ_MASK     0x0f
 223
 224 /*
 225  * CIR TX control register (0x02):
 226  *   7 - TX_START (1 to indicate TX start, auto-cleared when done)
 227  *   6 - TX_END (1 to indicate TX data written to TX fifo)
 228  */
 229 #define CIR_TX_CONTROL_TX_START 0x80
 230 #define CIR_TX_CONTROL_TX_END   0x40
 231