Em Thu, 20 Nov 2014 16:55:24 +0100
Hans de Goede <hdego...@redhat.com> escreveu:
> Add support for the larger fifo found on sun5i and sun6i, having a separate
> compatible for the ir found on sun5i & sun6i also is useful if we ever want
> to add ir transmit support, because the sun5i & sun6i version do not have
> transmit support.
>
> Note this commits also adds checking for the end-of-packet interrupt flag
> (which was already enabled), as the fifo-data-available interrupt flag only
> gets set when the trigger-level is exceeded. So far we've been getting away
> with not doing this because of the low trigger-level, but this is something
> which we should have done since day one.
>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
As this is meant to be merged via some other tree:
Acked-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
> ---
> .../devicetree/bindings/media/sunxi-ir.txt | 2 +-
> drivers/media/rc/sunxi-cir.c | 21
> ++++++++++++---------
> 2 files changed, 13 insertions(+), 10 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/media/sunxi-ir.txt
> b/Documentation/devicetree/bindings/media/sunxi-ir.txt
> index 23dd5ad..5767128 100644
> --- a/Documentation/devicetree/bindings/media/sunxi-ir.txt
> +++ b/Documentation/devicetree/bindings/media/sunxi-ir.txt
> @@ -1,7 +1,7 @@
> Device-Tree bindings for SUNXI IR controller found in sunXi SoC family
>
> Required properties:
> -- compatible : should be "allwinner,sun4i-a10-ir";
> +- compatible : "allwinner,sun4i-a10-ir" or "allwinner,sun5i-a13-ir"
> - clocks : list of clock specifiers, corresponding to
> entries in clock-names property;
> - clock-names : should contain "apb" and "ir" entries;
> diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
> index 895fb65..559b0e3 100644
> --- a/drivers/media/rc/sunxi-cir.c
> +++ b/drivers/media/rc/sunxi-cir.c
> @@ -56,12 +56,12 @@
> #define REG_RXINT_RAI_EN BIT(4)
>
> /* Rx FIFO available byte level */
> -#define REG_RXINT_RAL(val) (((val) << 8) & (GENMASK(11, 8)))
> +#define REG_RXINT_RAL(val) ((val) << 8)
>
> /* Rx Interrupt Status */
> #define SUNXI_IR_RXSTA_REG 0x30
> /* RX FIFO Get Available Counter */
> -#define REG_RXSTA_GET_AC(val) (((val) >> 8) & (GENMASK(5, 0)))
> +#define REG_RXSTA_GET_AC(val) (((val) >> 8) & (ir->fifo_size * 2 - 1))
> /* Clear all interrupt status value */
> #define REG_RXSTA_CLEARALL 0xff
>
> @@ -72,10 +72,6 @@
> /* CIR_REG register idle threshold */
> #define REG_CIR_ITHR(val) (((val) << 8) & (GENMASK(15, 8)))
>
> -/* Hardware supported fifo size */
> -#define SUNXI_IR_FIFO_SIZE 16
> -/* How many messages in FIFO trigger IRQ */
> -#define TRIGGER_LEVEL 8
> /* Required frequency for IR0 or IR1 clock in CIR mode */
> #define SUNXI_IR_BASE_CLK 8000000
> /* Frequency after IR internal divider */
> @@ -94,6 +90,7 @@ struct sunxi_ir {
> struct rc_dev *rc;
> void __iomem *base;
> int irq;
> + int fifo_size;
> struct clk *clk;
> struct clk *apb_clk;
> struct reset_control *rst;
> @@ -115,11 +112,11 @@ static irqreturn_t sunxi_ir_irq(int irqno, void *dev_id)
> /* clean all pending statuses */
> writel(status | REG_RXSTA_CLEARALL, ir->base + SUNXI_IR_RXSTA_REG);
>
> - if (status & REG_RXINT_RAI_EN) {
> + if (status & (REG_RXINT_RAI_EN | REG_RXINT_RPEI_EN)) {
> /* How many messages in fifo */
> rc = REG_RXSTA_GET_AC(status);
> /* Sanity check */
> - rc = rc > SUNXI_IR_FIFO_SIZE ? SUNXI_IR_FIFO_SIZE : rc;
> + rc = rc > ir->fifo_size ? ir->fifo_size : rc;
> /* If we have data */
> for (cnt = 0; cnt < rc; cnt++) {
> /* for each bit in fifo */
> @@ -156,6 +153,11 @@ static int sunxi_ir_probe(struct platform_device *pdev)
> if (!ir)
> return -ENOMEM;
>
> + if (of_device_is_compatible(dn, "allwinner,sun5i-a13-ir"))
> + ir->fifo_size = 64;
> + else
> + ir->fifo_size = 16;
> +
> /* Clock */
> ir->apb_clk = devm_clk_get(dev, "apb");
> if (IS_ERR(ir->apb_clk)) {
> @@ -271,7 +273,7 @@ static int sunxi_ir_probe(struct platform_device *pdev)
> * level
> */
> writel(REG_RXINT_ROI_EN | REG_RXINT_RPEI_EN |
> - REG_RXINT_RAI_EN | REG_RXINT_RAL(TRIGGER_LEVEL - 1),
> + REG_RXINT_RAI_EN | REG_RXINT_RAL(ir->fifo_size / 2 - 1),
> ir->base + SUNXI_IR_RXINT_REG);
>
> /* Enable IR Module */
> @@ -319,6 +321,7 @@ static int sunxi_ir_remove(struct platform_device *pdev)
>
> static const struct of_device_id sunxi_ir_match[] = {
> { .compatible = "allwinner,sun4i-a10-ir", },
> + { .compatible = "allwinner,sun5i-a13-ir", },
> {},
> };
>
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