On Fri, Aug 25, 2023 at 07:53:08PM +0800, zelong dong wrote:
> From: Zelong Dong <zelong.dong@xxxxxxxxxxx>
>
> Meson IR Controller supports hardware decoder in Meson-S4 and later
> SoC. So far, protocol NEC could be decoded by hardware decoder.
On Meson-S4, only the hardware decoder for NEC can be used using this
driver. Does the Meson-S4 hardware support software decoding? If
software decoding could be used, then any protocol could be supported,
not just NEC.
Also, out of interest, is there are documentation available for this
hardware?
Thanks,
Sean
>
> Signed-off-by: Zelong Dong <zelong.dong@xxxxxxxxxxx>
> ---
> drivers/media/rc/meson-ir.c | 522 +++++++++++++++++++++++++++++++-----
> 1 file changed, 451 insertions(+), 71 deletions(-)
>
> diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
> index 70322fab34ac..5303e6da5809 100644
> --- a/drivers/media/rc/meson-ir.c
> +++ b/drivers/media/rc/meson-ir.c
> @@ -20,48 +20,196 @@
>
> #define DRIVER_NAME "meson-ir"
>
> -#define IR_DEC_LDR_ACTIVE 0x00
> -#define IR_DEC_LDR_IDLE 0x04
> -#define IR_DEC_LDR_REPEAT 0x08
> -#define IR_DEC_BIT_0 0x0c
> -#define IR_DEC_REG0 0x10
> -#define IR_DEC_REG0_BASE_TIME GENMASK(11, 0)
> -#define IR_DEC_FRAME 0x14
> -#define IR_DEC_STATUS 0x18
> -#define IR_DEC_STATUS_PULSE BIT(8)
> -#define IR_DEC_REG1 0x1c
> -#define IR_DEC_REG1_TIME_IV GENMASK(28, 16)
> -#define IR_DEC_REG1_ENABLE BIT(15)
> -#define IR_DEC_REG1_MODE GENMASK(8, 7)
> -#define IR_DEC_REG1_IRQSEL GENMASK(3, 2)
> -#define IR_DEC_REG1_RESET BIT(0)
> -/* The following regs are only available on Meson 8b and newer */
> -#define IR_DEC_REG2 0x20
> -#define IR_DEC_REG2_MODE GENMASK(3, 0)
> -
> -#define DEC_MODE_NEC 0x0
> -#define DEC_MODE_RAW 0x2
> -
> -#define IRQSEL_NEC_MODE 0
> -#define IRQSEL_RISE_FALL 1
> -#define IRQSEL_FALL 2
> -#define IRQSEL_RISE 3
> -
> -#define MESON_RAW_TRATE 10 /* us */
> -#define MESON_HW_TRATE 20 /* us */
> +#define IR_DEC_LDR_ACTIVE 0x00
> +#define IR_DEC_LDR_ACTIVE_MAX GENMASK(28, 16)
> +#define IR_DEC_LDR_ACTIVE_MIN GENMASK(12, 0)
> +#define IR_DEC_LDR_IDLE 0x04
> +#define IR_DEC_LDR_IDLE_MAX GENMASK(28, 16)
> +#define IR_DEC_LDR_IDLE_MIN GENMASK(12, 0)
> +#define IR_DEC_LDR_REPEAT 0x08
> +#define IR_DEC_LDR_REPEAT_MAX GENMASK(25, 16)
> +#define IR_DEC_LDR_REPEAT_MIN GENMASK(9, 0)
> +#define IR_DEC_BIT_0 0x0c
> +#define IR_DEC_BIT_0_MAX GENMASK(25, 16)
> +#define IR_DEC_BIT_0_MIN GENMASK(9, 0)
> +#define IR_DEC_REG0 0x10
> +#define IR_DEC_REG0_FILTER GENMASK(30, 28)
> +#define IR_DEC_REG0_FRAME_TIME_MAX GENMASK(24, 12)
> +#define IR_DEC_REG0_BASE_TIME GENMASK(11, 0)
> +#define IR_DEC_FRAME 0x14
> +#define IR_DEC_STATUS 0x18
> +#define IR_DEC_STATUS_BIT_1_ENABLE BIT(30)
> +#define IR_DEC_STATUS_BIT_1_MAX GENMASK(29, 20)
> +#define IR_DEC_STATUS_BIT_1_MIN GENMASK(19, 10)
> +#define IR_DEC_STATUS_PULSE BIT(8)
> +#define IR_DEC_STATUS_BUSY BIT(7)
> +#define IR_DEC_STATUS_FRAME_STATUS GENMASK(3, 0)
> +#define IR_DEC_REG1 0x1c
> +#define IR_DEC_REG1_TIME_IV GENMASK(28, 16)
> +#define IR_DEC_REG1_FRAME_LEN GENMASK(13, 8)
> +#define IR_DEC_REG1_ENABLE BIT(15)
> +#define IR_DEC_REG1_HOLD_CODE BIT(6)
> +#define IR_DEC_REG1_IRQSEL GENMASK(3, 2)
> +#define IR_DEC_REG1_RESET BIT(0)
> +/* Meson 6b uses REG1 to configure IR mode */
> +#define IR_DEC_REG1_MODE GENMASK(8, 7)
> +
> +/* The following registers are only available on Meson 8b and newer */
> +#define IR_DEC_REG2 0x20
> +#define IR_DEC_REG2_TICK_MODE BIT(15)
> +#define IR_DEC_REG2_REPEAT_COUNTER BIT(13)
> +#define IR_DEC_REG2_REPEAT_TIME BIT(12)
> +#define IR_DEC_REG2_COMPARE_FRAME BIT(11)
> +#define IR_DEC_REG2_BIT_ORDER BIT(8)
> +/* Meson 8b / GXBB use REG2 to configure IR mode */
> +#define IR_DEC_REG2_MODE GENMASK(3, 0)
> +#define IR_DEC_DURATN2 0x24
> +#define IR_DEC_DURATN2_MAX GENMASK(25, 16)
> +#define IR_DEC_DURATN2_MIN GENMASK(9, 0)
> +#define IR_DEC_DURATN3 0x28
> +#define IR_DEC_DURATN3_MAX GENMASK(25, 16)
> +#define IR_DEC_DURATN3_MIN GENMASK(9, 0)
> +#define IR_DEC_FRAME1 0x2c
> +
> +#define FRAME_MSB_FIRST true
> +#define FRAME_LSB_FIRST false
> +
> +#define DEC_MODE_NEC 0x0
> +#define DEC_MODE_RAW 0x2
> +#define DEC_MODE_RC6 0x9
> +#define DEC_MODE_XMP 0xE
> +#define DEC_MODE_UNKNOW 0xFF
> +
> +#define DEC_STATUS_VALID BIT(3)
> +#define DEC_STATUS_DATA_CODE_ERR BIT(2)
> +#define DEC_STATUS_CUSTOM_CODE_ERR BIT(1)
> +#define DEC_STATUS_REPEAT BIT(0)
> +
> +#define IRQSEL_DEC_MODE 0
> +#define IRQSEL_RISE_FALL 1
> +#define IRQSEL_FALL 2
> +#define IRQSEL_RISE 3
> +
> +#define MESON_RAW_TRATE 10 /* us */
> +#define MESON_HW_TRATE 20 /* us */
> +
> +/**
> + * struct meson_ir_protocol - describe IR Protocol parameter
> + *
> + * @hw_protocol: select IR Protocol from IR Controller
> + * @repeat_counter_enable: enable frame-to-frame time counter, it should work
> + * with @repeat_compare_enable to detect the repeat frame
> + * @repeat_check_enable: enable repeat time check for repeat detection
> + * @repeat_compare_enable: enable to compare frame for repeat frame detection.
> + * Some IR Protocol send the same data as repeat frame.
> + * In this case, it should work with
> + * @repeat_counter_enable to detect the repeat frame.
> + * @bit_order: bit order, LSB or MSB
> + * @bit1_match_enable: enable to check bit 1
> + * @hold_code_enable: hold frame code in register IR_DEC_FRAME1, the new one
> + * frame code will not be store in IR_DEC_FRAME1.
> + * until IR_DEC_FRAME1 has been read
> + * @count_tick_mode: increasing time unit of frame-to-frame time counter.
> + * 0 = 100us, 1 = 10us
> + * @code_length: length (N-1) of data frame
> + * @frame_time_max: max time for whole frame. Unit: MESON_HW_TRATE
> + * @leader_active_max: max time for NEC/RC6 leader active part. Unit: MESON_HW_TRATE
> + * @leader_active_min: min time for NEC/RC6 leader active part. Unit: MESON_HW_TRATE
> + * @leader_idle_max: max time for NEC/RC6 leader idle part. Unit: MESON_HW_TRATE
> + * @leader_idle_min: min time for NEC/RC6 leader idle part. Unit: MESON_HW_TRATE
> + * @repeat_leader_max: max time for NEC repeat leader idle part. Unit: MESON_HW_TRATE
> + * @repeat_leader_min: min time for NEC repeat leader idle part. Unit: MESON_HW_TRATE
> + * @bit0_max: max time for NEC Logic '0', half of RC6 trailer bit, XMP Logic '00'
> + * @bit0_min: min time for NEC Logic '0', half of RC6 trailer bit, XMP Logic '00'
> + * @bit1_max: max time for NEC Logic '1', whole of RC6 trailer bit, XMP Logic '01'
> + * @bit1_min: min time for NEC Logic '1', whole of RC6 trailer bit, XMP Logic '01'
> + * @duration2_max: max time for half of RC6 normal bit, XMP Logic '10'
> + * @duration2_min: min time for half of RC6 normal bit, XMP Logic '10'
> + * @duration3_max: max time for whole of RC6 normal bit, XMP Logic '11'
> + * @duration3_min: min time for whole of RC6 normal bit, XMP Logic '11'
> + */
> +
> +struct meson_ir_protocol {
> + u8 hw_protocol;
> + bool repeat_counter_enable;
> + bool repeat_check_enable;
> + bool repeat_compare_enable;
> + bool bit_order;
> + bool bit1_match_enable;
> + bool hold_code_enable;
> + bool count_tick_mode;
> + u8 code_length;
> + u16 frame_time_max;
> + u16 leader_active_max;
> + u16 leader_active_min;
> + u16 leader_idle_max;
> + u16 leader_idle_min;
> + u16 repeat_leader_max;
> + u16 repeat_leader_min;
> + u16 bit0_max;
> + u16 bit0_min;
> + u16 bit1_max;
> + u16 bit1_min;
> + u16 duration2_max;
> + u16 duration2_min;
> + u16 duration3_max;
> + u16 duration3_min;
> +};
> +
> +struct meson_ir_param {
> + bool support_hw_decoder;
> + unsigned int max_register;
> +};
>
> struct meson_ir {
> + const struct meson_ir_param *param;
> struct regmap *reg;
> struct rc_dev *rc;
> spinlock_t lock;
> };
>
> -static const struct regmap_config meson_ir_regmap_config = {
> +static struct regmap_config meson_ir_regmap_config = {
> .reg_bits = 32,
> .val_bits = 32,
> .reg_stride = 4,
> };
>
> +static const struct meson_ir_protocol protocol_timings[] = {
> + /* protocol, repeat counter, repeat check, repeat compare, order */
> + {DEC_MODE_NEC, false, false, false, FRAME_LSB_FIRST,
> + /* bit 1 match, hold code, count tick, len, frame time */
> + true, false, false, 32, 4000,
> + /* leader active max/min, leader idle max/min, repeat leader max/min */
> + 500, 400, 300, 200, 150, 80,
> + /* bit0 max/min, bit1 max/min, duration2 max/min, duration3 max/min */
> + 72, 40, 134, 90, 0, 0, 0, 0}
> +};
> +
> +static void meson_ir_nec_handler(struct meson_ir *ir)
> +{
> + u32 code = 0;
> + u32 status = 0;
> + enum rc_proto proto;
> +
> + regmap_read(ir->reg, IR_DEC_STATUS, &status);
> +
> + if (status & DEC_STATUS_REPEAT) {
> + rc_repeat(ir->rc);
> + } else {
> + regmap_read(ir->reg, IR_DEC_FRAME, &code);
> +
> + code = ir_nec_bytes_to_scancode(code, code >> 8,
> + code >> 16, code >> 24, &proto);
> + rc_keydown(ir->rc, proto, code, 0);
> + }
> +}
> +
> +static void meson_ir_hw_handler(struct meson_ir *ir)
> +{
> + if (ir->rc->enabled_protocols & RC_PROTO_BIT_NEC)
> + meson_ir_nec_handler(ir);
> +}
> +
> static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
> {
> struct meson_ir *ir = dev_id;
> @@ -70,22 +218,232 @@ static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
>
> spin_lock(&ir->lock);
>
> - regmap_read(ir->reg, IR_DEC_REG1, &duration);
> - duration = FIELD_GET(IR_DEC_REG1_TIME_IV, duration);
> - rawir.duration = duration * MESON_RAW_TRATE;
> -
> regmap_read(ir->reg, IR_DEC_STATUS, &status);
> - rawir.pulse = !!(status & IR_DEC_STATUS_PULSE);
>
> - ir_raw_event_store_with_timeout(ir->rc, &rawir);
> + if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
> + rawir.pulse = !!(status & IR_DEC_STATUS_PULSE);
> +
> + regmap_read(ir->reg, IR_DEC_REG1, &duration);
> + duration = FIELD_GET(IR_DEC_REG1_TIME_IV, duration);
> + rawir.duration = duration * MESON_RAW_TRATE;
> +
> + ir_raw_event_store_with_timeout(ir->rc, &rawir);
> + } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
> + if (status & DEC_STATUS_VALID)
> + meson_ir_hw_handler(ir);
> + }
>
> spin_unlock(&ir->lock);
>
> return IRQ_HANDLED;
> }
>
> +static int meson_ir_hw_decoder_init(struct rc_dev *dev, u64 *rc_type)
> +{
> + u8 protocol;
> + u32 regval;
> + int i;
> + unsigned long flags;
> + const struct meson_ir_protocol *timings;
> + struct meson_ir *ir = dev->priv;
> +
> + if (*rc_type & RC_PROTO_BIT_NEC)
> + protocol = DEC_MODE_NEC;
> + else
> + return 0;
> +
> + for (i = 0; i < ARRAY_SIZE(protocol_timings); i++)
> + if (protocol_timings[i].hw_protocol == protocol)
> + break;
> +
> + if (i == ARRAY_SIZE(protocol_timings)) {
> + dev_err(&dev->dev, "hw protocol isn't supported: %d\n",
> + protocol);
> + return -EINVAL;
> + }
> + timings = &protocol_timings[i];
> +
> + spin_lock_irqsave(&ir->lock, flags);
> +
> + /* Clear controller status */
> + regmap_read(ir->reg, IR_DEC_STATUS, ®val);
> + regmap_read(ir->reg, IR_DEC_FRAME, ®val);
> +
> + /* Reset ir decoder and disable decoder */
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
> + IR_DEC_REG1_RESET);
> +
> + /* Base time resolution, (19+1)*1us=20us */
> + regval = FIELD_PREP(IR_DEC_REG0_BASE_TIME, MESON_HW_TRATE - 1);
> + regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME, regval);
> +
> + /* Monitor timing for input filter */
> + regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_FILTER,
> + FIELD_PREP(IR_DEC_REG0_FILTER, 7));
> +
> + /* HW protocol */
> + regval = FIELD_PREP(IR_DEC_REG2_MODE, timings->hw_protocol);
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE, regval);
> +
> + /* Hold frame data until register was read */
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_HOLD_CODE,
> + timings->hold_code_enable ?
> + IR_DEC_REG1_HOLD_CODE : 0);
> +
> + /* Bit order */
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_BIT_ORDER,
> + timings->bit_order ? IR_DEC_REG2_BIT_ORDER : 0);
> +
> + /* Select tick mode */
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_TICK_MODE,
> + timings->count_tick_mode ?
> + IR_DEC_REG2_TICK_MODE : 0);
> +
> + /*
> + * Some protocols transmit the same data frame as repeat frame
> + * when the key is pressing. In this case, it could be detected as
> + * repeat frame if the repeat checker was enabled.
> + */
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_REPEAT_COUNTER,
> + timings->repeat_counter_enable ?
> + IR_DEC_REG2_REPEAT_COUNTER : 0);
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_REPEAT_TIME,
> + timings->repeat_check_enable ?
> + IR_DEC_REG2_REPEAT_TIME : 0);
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_COMPARE_FRAME,
> + timings->repeat_compare_enable ?
> + IR_DEC_REG2_COMPARE_FRAME : 0);
> +
> + /*
> + * FRAME_TIME_MAX should be larger than the time between
> + * data frame and repeat frame
> + */
> + regval = FIELD_PREP(IR_DEC_REG0_FRAME_TIME_MAX,
> + timings->frame_time_max);
> + regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_FRAME_TIME_MAX,
> + regval);
> +
> + /* Length(N-1) of data frame */
> + regval = FIELD_PREP(IR_DEC_REG1_FRAME_LEN, timings->code_length - 1);
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_FRAME_LEN, regval);
> +
> + /* Time for leader active part */
> + regval = FIELD_PREP(IR_DEC_LDR_ACTIVE_MAX,
> + timings->leader_active_max) |
> + FIELD_PREP(IR_DEC_LDR_ACTIVE_MIN,
> + timings->leader_active_min);
> + regmap_update_bits(ir->reg, IR_DEC_LDR_ACTIVE, IR_DEC_LDR_ACTIVE_MAX |
> + IR_DEC_LDR_ACTIVE_MIN, regval);
> +
> + /* Time for leader idle part */
> + regval = FIELD_PREP(IR_DEC_LDR_IDLE_MAX, timings->leader_idle_max) |
> + FIELD_PREP(IR_DEC_LDR_IDLE_MIN, timings->leader_idle_min);
> + regmap_update_bits(ir->reg, IR_DEC_LDR_IDLE,
> + IR_DEC_LDR_IDLE_MAX | IR_DEC_LDR_IDLE_MIN, regval);
> +
> + /* Time for repeat leader idle part */
> + regval = FIELD_PREP(IR_DEC_LDR_REPEAT_MAX, timings->repeat_leader_max) |
> + FIELD_PREP(IR_DEC_LDR_REPEAT_MIN, timings->repeat_leader_min);
> + regmap_update_bits(ir->reg, IR_DEC_LDR_REPEAT, IR_DEC_LDR_REPEAT_MAX |
> + IR_DEC_LDR_REPEAT_MIN, regval);
> +
> + /*
> + * NEC: Time for logic '0'
> + * RC6: Time for half of trailer bit
> + */
> + regval = FIELD_PREP(IR_DEC_BIT_0_MAX, timings->bit0_max) |
> + FIELD_PREP(IR_DEC_BIT_0_MIN, timings->bit0_min);
> + regmap_update_bits(ir->reg, IR_DEC_BIT_0,
> + IR_DEC_BIT_0_MAX | IR_DEC_BIT_0_MIN, regval);
> +
> + /*
> + * NEC: Time for logic '1'
> + * RC6: Time for whole of trailer bit
> + */
> + regval = FIELD_PREP(IR_DEC_STATUS_BIT_1_MAX, timings->bit1_max) |
> + FIELD_PREP(IR_DEC_STATUS_BIT_1_MIN, timings->bit1_min);
> + regmap_update_bits(ir->reg, IR_DEC_STATUS, IR_DEC_STATUS_BIT_1_MAX |
> + IR_DEC_STATUS_BIT_1_MIN, regval);
> +
> + /* Enable to match logic '1' */
> + regmap_update_bits(ir->reg, IR_DEC_STATUS, IR_DEC_STATUS_BIT_1_ENABLE,
> + timings->bit1_match_enable ?
> + IR_DEC_STATUS_BIT_1_ENABLE : 0);
> +
> + /*
> + * NEC: Unused
> + * RC6: Time for halt of logic 0/1
> + */
> + regval = FIELD_PREP(IR_DEC_DURATN2_MAX, timings->duration2_max) |
> + FIELD_PREP(IR_DEC_DURATN2_MIN, timings->duration2_min);
> + regmap_update_bits(ir->reg, IR_DEC_DURATN2,
> + IR_DEC_DURATN2_MAX | IR_DEC_DURATN2_MIN, regval);
> +
> + /*
> + * NEC: Unused
> + * RC6: Time for whole logic 0/1
> + */
> + regval = FIELD_PREP(IR_DEC_DURATN3_MAX, timings->duration3_max) |
> + FIELD_PREP(IR_DEC_DURATN3_MIN, timings->duration3_min);
> + regmap_update_bits(ir->reg, IR_DEC_DURATN3,
> + IR_DEC_DURATN3_MAX | IR_DEC_DURATN3_MIN, regval);
> +
> + /* Reset ir decoder and enable decode */
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
> + IR_DEC_REG1_RESET);
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
> + IR_DEC_REG1_ENABLE);
> +
> + spin_unlock_irqrestore(&ir->lock, flags);
> +
> + dev_info(&dev->dev, "hw decoder init, protocol: %d\n", protocol);
> +
> + return 0;
> +}
> +
> +static void meson_ir_sw_decoder_init(struct rc_dev *dev)
> +{
> + unsigned long flags;
> + struct meson_ir *ir = dev->priv;
> +
> + spin_lock_irqsave(&ir->lock, flags);
> +
> + /* Reset the decoder */
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
> + IR_DEC_REG1_RESET);
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
> +
> + /* Set general operation mode (= raw/software decoding) */
> + if (of_device_is_compatible(dev->dev.of_node, "amlogic,meson6-ir"))
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
> + FIELD_PREP(IR_DEC_REG1_MODE,
> + DEC_MODE_RAW));
> + else
> + regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
> + FIELD_PREP(IR_DEC_REG2_MODE,
> + DEC_MODE_RAW));
> +
> + /* Set rate */
> + regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
> + FIELD_PREP(IR_DEC_REG0_BASE_TIME,
> + MESON_RAW_TRATE - 1));
> + /* IRQ on rising and falling edges */
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,
> + FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL));
> + /* Enable the decoder */
> + regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
> + IR_DEC_REG1_ENABLE);
> +
> + spin_unlock_irqrestore(&ir->lock, flags);
> +
> + dev_info(&dev->dev, "sw decoder init\n");
> +}
> +
> static int meson_ir_probe(struct platform_device *pdev)
> {
> + const struct meson_ir_param *match_data;
> struct device *dev = &pdev->dev;
> struct device_node *node = dev->of_node;
> void __iomem *res_start;
> @@ -97,10 +455,17 @@ static int meson_ir_probe(struct platform_device *pdev)
> if (!ir)
> return -ENOMEM;
>
> + match_data = of_device_get_match_data(dev);
> + if (!match_data)
> + return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
> +
> + ir->param = match_data;
> +
> res_start = devm_platform_ioremap_resource(pdev, 0);
> if (IS_ERR(res_start))
> return PTR_ERR(res_start);
>
> + meson_ir_regmap_config.max_register = ir->param->max_register;
> ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start,
> &meson_ir_regmap_config);
> if (IS_ERR(ir->reg))
> @@ -110,23 +475,34 @@ static int meson_ir_probe(struct platform_device *pdev)
> if (irq < 0)
> return irq;
>
> - ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
> + if (ir->param->support_hw_decoder)
> + ir->rc = devm_rc_allocate_device(&pdev->dev,
> + RC_DRIVER_SCANCODE);
> + else
> + ir->rc = devm_rc_allocate_device(&pdev->dev, RC_DRIVER_IR_RAW);
> +
> if (!ir->rc) {
> dev_err(dev, "failed to allocate rc device\n");
> return -ENOMEM;
> }
>
> + if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
> + ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
> + ir->rc->rx_resolution = MESON_RAW_TRATE;
> + ir->rc->min_timeout = 1;
> + ir->rc->timeout = IR_DEFAULT_TIMEOUT;
> + ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
> + } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
> + ir->rc->allowed_protocols = RC_PROTO_BIT_NEC;
> + ir->rc->change_protocol = meson_ir_hw_decoder_init;
> + }
> +
> ir->rc->priv = ir;
> ir->rc->device_name = DRIVER_NAME;
> ir->rc->input_phys = DRIVER_NAME "/input0";
> ir->rc->input_id.bustype = BUS_HOST;
> map_name = of_get_property(node, "linux,rc-map-name", NULL);
> ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
> - ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
> - ir->rc->rx_resolution = MESON_RAW_TRATE;
> - ir->rc->min_timeout = 1;
> - ir->rc->timeout = IR_DEFAULT_TIMEOUT;
> - ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
> ir->rc->driver_name = DRIVER_NAME;
>
> spin_lock_init(&ir->lock);
> @@ -138,36 +514,15 @@ static int meson_ir_probe(struct platform_device *pdev)
> return ret;
> }
>
> - ret = devm_request_irq(dev, irq, meson_ir_irq, 0, NULL, ir);
> + if (ir->rc->driver_type == RC_DRIVER_IR_RAW)
> + meson_ir_sw_decoder_init(ir->rc);
> +
> + ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "meson_ir", ir);
> if (ret) {
> dev_err(dev, "failed to request irq\n");
> return ret;
> }
>
> - /* Reset the decoder */
> - regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
> - IR_DEC_REG1_RESET);
> - regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
> -
> - /* Set general operation mode (= raw/software decoding) */
> - if (of_device_is_compatible(node, "amlogic,meson6-ir"))
> - regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
> - FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_RAW));
> - else
> - regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
> - FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_RAW));
> -
> - /* Set rate */
> - regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
> - FIELD_PREP(IR_DEC_REG0_BASE_TIME,
> - MESON_RAW_TRATE - 1));
> - /* IRQ on rising and falling edges */
> - regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,
> - FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL));
> - /* Enable the decoder */
> - regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
> - IR_DEC_REG1_ENABLE);
> -
> dev_info(dev, "receiver initialized\n");
>
> return 0;
> @@ -212,11 +567,36 @@ static void meson_ir_shutdown(struct platform_device *pdev)
> spin_unlock_irqrestore(&ir->lock, flags);
> }
>
> +static const struct meson_ir_param meson6_ir_param = {
> + .support_hw_decoder = false,
> + .max_register = IR_DEC_REG1,
> +};
> +
> +static const struct meson_ir_param meson8b_ir_param = {
> + .support_hw_decoder = false,
> + .max_register = IR_DEC_REG2,
> +};
> +
> +static const struct meson_ir_param meson_s4_ir_param = {
> + .support_hw_decoder = true,
> + .max_register = IR_DEC_FRAME1,
> +};
> +
> static const struct of_device_id meson_ir_match[] = {
> - { .compatible = "amlogic,meson6-ir" },
> - { .compatible = "amlogic,meson8b-ir" },
> - { .compatible = "amlogic,meson-gxbb-ir" },
> - { },
> + {
> + .compatible = "amlogic,meson6-ir",
> + .data = &meson6_ir_param,
> + }, {
> + .compatible = "amlogic,meson8b-ir",
> + .data = &meson8b_ir_param,
> + }, {
> + .compatible = "amlogic,meson-gxbb-ir",
> + .data = &meson8b_ir_param,
> + }, {
> + .compatible = "amlogic,meson-s4-ir",
> + .data = &meson_s4_ir_param,
> + },
> + {},
> };
> MODULE_DEVICE_TABLE(of, meson_ir_match);
>
> --
> 2.35.1
