diff options
Diffstat (limited to 'drivers/media/rc/sunxi-cir.c')
| -rw-r--r-- | drivers/media/rc/sunxi-cir.c | 89 |
1 files changed, 68 insertions, 21 deletions
diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c index aa719d0ae6b0..e222b4c98be4 100644 --- a/drivers/media/rc/sunxi-cir.c +++ b/drivers/media/rc/sunxi-cir.c @@ -39,11 +39,11 @@ /* Rx Interrupt Enable */ #define SUNXI_IR_RXINT_REG 0x2C -/* Rx FIFO Overflow */ +/* Rx FIFO Overflow Interrupt Enable */ #define REG_RXINT_ROI_EN BIT(0) -/* Rx Packet End */ +/* Rx Packet End Interrupt Enable */ #define REG_RXINT_RPEI_EN BIT(1) -/* Rx FIFO Data Available */ +/* Rx FIFO Data Available Interrupt Enable */ #define REG_RXINT_RAI_EN BIT(4) /* Rx FIFO available byte level */ @@ -51,6 +51,12 @@ /* Rx Interrupt Status */ #define SUNXI_IR_RXSTA_REG 0x30 +/* Rx FIFO Overflow */ +#define REG_RXSTA_ROI REG_RXINT_ROI_EN +/* Rx Packet End */ +#define REG_RXSTA_RPE REG_RXINT_RPEI_EN +/* Rx FIFO Data Available */ +#define REG_RXSTA_RA REG_RXINT_RAI_EN /* RX FIFO Get Available Counter */ #define REG_RXSTA_GET_AC(val) (((val) >> 8) & (ir->fifo_size * 2 - 1)) /* Clear all interrupt status value */ @@ -72,6 +78,17 @@ /* Time after which device stops sending data in ms */ #define SUNXI_IR_TIMEOUT 120 +/** + * struct sunxi_ir_quirks - Differences between SoC variants. + * + * @has_reset: SoC needs reset deasserted. + * @fifo_size: size of the fifo. + */ +struct sunxi_ir_quirks { + bool has_reset; + int fifo_size; +}; + struct sunxi_ir { spinlock_t ir_lock; struct rc_dev *rc; @@ -99,7 +116,7 @@ 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 | REG_RXINT_RPEI_EN)) { + if (status & (REG_RXSTA_RA | REG_RXSTA_RPE)) { /* How many messages in fifo */ rc = REG_RXSTA_GET_AC(status); /* Sanity check */ @@ -115,9 +132,9 @@ static irqreturn_t sunxi_ir_irq(int irqno, void *dev_id) } } - if (status & REG_RXINT_ROI_EN) { + if (status & REG_RXSTA_ROI) { ir_raw_event_reset(ir->rc); - } else if (status & REG_RXINT_RPEI_EN) { + } else if (status & REG_RXSTA_RPE) { ir_raw_event_set_idle(ir->rc, true); ir_raw_event_handle(ir->rc); } @@ -134,6 +151,7 @@ static int sunxi_ir_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *dn = dev->of_node; + const struct sunxi_ir_quirks *quirks; struct resource *res; struct sunxi_ir *ir; u32 b_clk_freq = SUNXI_IR_BASE_CLK; @@ -142,12 +160,15 @@ static int sunxi_ir_probe(struct platform_device *pdev) if (!ir) return -ENOMEM; + quirks = of_device_get_match_data(&pdev->dev); + if (!quirks) { + dev_err(&pdev->dev, "Failed to determine the quirks to use\n"); + return -ENODEV; + } + spin_lock_init(&ir->ir_lock); - if (of_device_is_compatible(dn, "allwinner,sun5i-a13-ir")) - ir->fifo_size = 64; - else - ir->fifo_size = 16; + ir->fifo_size = quirks->fifo_size; /* Clock */ ir->apb_clk = devm_clk_get(dev, "apb"); @@ -164,13 +185,15 @@ static int sunxi_ir_probe(struct platform_device *pdev) /* Base clock frequency (optional) */ of_property_read_u32(dn, "clock-frequency", &b_clk_freq); - /* Reset (optional) */ - ir->rst = devm_reset_control_get_optional_exclusive(dev, NULL); - if (IS_ERR(ir->rst)) - return PTR_ERR(ir->rst); - ret = reset_control_deassert(ir->rst); - if (ret) - return ret; + /* Reset */ + if (quirks->has_reset) { + ir->rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(ir->rst)) + return PTR_ERR(ir->rst); + ret = reset_control_deassert(ir->rst); + if (ret) + return ret; + } ret = clk_set_rate(ir->clk, b_clk_freq); if (ret) { @@ -233,7 +256,6 @@ static int sunxi_ir_probe(struct platform_device *pdev) /* IRQ */ ir->irq = platform_get_irq(pdev, 0); if (ir->irq < 0) { - dev_err(dev, "no irq resource\n"); ret = ir->irq; goto exit_free_dev; } @@ -306,10 +328,35 @@ static int sunxi_ir_remove(struct platform_device *pdev) return 0; } +static const struct sunxi_ir_quirks sun4i_a10_ir_quirks = { + .has_reset = false, + .fifo_size = 16, +}; + +static const struct sunxi_ir_quirks sun5i_a13_ir_quirks = { + .has_reset = false, + .fifo_size = 64, +}; + +static const struct sunxi_ir_quirks sun6i_a31_ir_quirks = { + .has_reset = true, + .fifo_size = 64, +}; + static const struct of_device_id sunxi_ir_match[] = { - { .compatible = "allwinner,sun4i-a10-ir", }, - { .compatible = "allwinner,sun5i-a13-ir", }, - {}, + { + .compatible = "allwinner,sun4i-a10-ir", + .data = &sun4i_a10_ir_quirks, + }, + { + .compatible = "allwinner,sun5i-a13-ir", + .data = &sun5i_a13_ir_quirks, + }, + { + .compatible = "allwinner,sun6i-a31-ir", + .data = &sun6i_a31_ir_quirks, + }, + {} }; MODULE_DEVICE_TABLE(of, sunxi_ir_match); |