From df06981514d43ff1101d3af748655b3df60751ce Mon Sep 17 00:00:00 2001 From: Nan Li Date: Tue, 3 Apr 2018 18:06:50 +0800 Subject: [PATCH] mmc: meson-axg: add support for the Meson-AXG platform Introduce the compatible data to cover the register offset & mask change of the eMMC controller in Amlogic's Meson-AXG SoC. Signed-off-by: Nan Li Signed-off-by: Yixun Lan Signed-off-by: Ulf Hansson Acked-by: Kevin Hilman --- drivers/mmc/host/meson-gx-mmc.c | 61 ++++++++++++++++++++++++++++++++++------- 1 file changed, 51 insertions(+), 10 deletions(-) diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 4f972b879fe6..56c90542ac29 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -47,15 +47,29 @@ #define CLK_CORE_PHASE_MASK GENMASK(9, 8) #define CLK_TX_PHASE_MASK GENMASK(11, 10) #define CLK_RX_PHASE_MASK GENMASK(13, 12) -#define CLK_TX_DELAY_MASK GENMASK(19, 16) -#define CLK_RX_DELAY_MASK GENMASK(23, 20) +#define CLK_V2_TX_DELAY_MASK GENMASK(19, 16) +#define CLK_V2_RX_DELAY_MASK GENMASK(23, 20) +#define CLK_V2_ALWAYS_ON BIT(24) + +#define CLK_V3_TX_DELAY_MASK GENMASK(21, 16) +#define CLK_V3_RX_DELAY_MASK GENMASK(27, 22) +#define CLK_V3_ALWAYS_ON BIT(28) + #define CLK_DELAY_STEP_PS 200 #define CLK_PHASE_STEP 30 #define CLK_PHASE_POINT_NUM (360 / CLK_PHASE_STEP) -#define CLK_ALWAYS_ON BIT(24) + +#define CLK_TX_DELAY_MASK(h) (h->data->tx_delay_mask) +#define CLK_RX_DELAY_MASK(h) (h->data->rx_delay_mask) +#define CLK_ALWAYS_ON(h) (h->data->always_on) #define SD_EMMC_DELAY 0x4 #define SD_EMMC_ADJUST 0x8 + +#define SD_EMMC_DELAY1 0x4 +#define SD_EMMC_DELAY2 0x8 +#define SD_EMMC_V3_ADJUST 0xc + #define SD_EMMC_CALOUT 0x10 #define SD_EMMC_START 0x40 #define START_DESC_INIT BIT(0) @@ -122,6 +136,12 @@ #define MUX_CLK_NUM_PARENTS 2 +struct meson_mmc_data { + unsigned int tx_delay_mask; + unsigned int rx_delay_mask; + unsigned int always_on; +}; + struct sd_emmc_desc { u32 cmd_cfg; u32 cmd_arg; @@ -131,6 +151,7 @@ struct sd_emmc_desc { struct meson_host { struct device *dev; + struct meson_mmc_data *data; struct mmc_host *mmc; struct mmc_command *cmd; @@ -474,7 +495,7 @@ static int meson_mmc_clk_init(struct meson_host *host) /* init SD_EMMC_CLOCK to sane defaults w/min clock rate */ clk_reg = 0; - clk_reg |= CLK_ALWAYS_ON; + clk_reg |= CLK_ALWAYS_ON(host); clk_reg |= CLK_DIV_MASK; writel(clk_reg, host->regs + SD_EMMC_CLOCK); @@ -574,7 +595,7 @@ static int meson_mmc_clk_init(struct meson_host *host) tx->reg = host->regs + SD_EMMC_CLOCK; tx->phase_mask = CLK_TX_PHASE_MASK; - tx->delay_mask = CLK_TX_DELAY_MASK; + tx->delay_mask = CLK_TX_DELAY_MASK(host); tx->delay_step_ps = CLK_DELAY_STEP_PS; tx->hw.init = &init; @@ -597,7 +618,7 @@ static int meson_mmc_clk_init(struct meson_host *host) rx->reg = host->regs + SD_EMMC_CLOCK; rx->phase_mask = CLK_RX_PHASE_MASK; - rx->delay_mask = CLK_RX_DELAY_MASK; + rx->delay_mask = CLK_RX_DELAY_MASK(host); rx->delay_step_ps = CLK_DELAY_STEP_PS; rx->hw.init = &init; @@ -1184,6 +1205,13 @@ static int meson_mmc_probe(struct platform_device *pdev) goto free_host; } + host->data = (struct meson_mmc_data *) + of_device_get_match_data(&pdev->dev); + if (!host->data) { + ret = -EINVAL; + goto free_host; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); host->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(host->regs)) { @@ -1315,11 +1343,24 @@ static int meson_mmc_remove(struct platform_device *pdev) return 0; } +static const struct meson_mmc_data meson_gx_data = { + .tx_delay_mask = CLK_V2_TX_DELAY_MASK, + .rx_delay_mask = CLK_V2_RX_DELAY_MASK, + .always_on = CLK_V2_ALWAYS_ON, +}; + +static const struct meson_mmc_data meson_axg_data = { + .tx_delay_mask = CLK_V3_TX_DELAY_MASK, + .rx_delay_mask = CLK_V3_RX_DELAY_MASK, + .always_on = CLK_V3_ALWAYS_ON, +}; + static const struct of_device_id meson_mmc_of_match[] = { - { .compatible = "amlogic,meson-gx-mmc", }, - { .compatible = "amlogic,meson-gxbb-mmc", }, - { .compatible = "amlogic,meson-gxl-mmc", }, - { .compatible = "amlogic,meson-gxm-mmc", }, + { .compatible = "amlogic,meson-gx-mmc", .data = &meson_gx_data }, + { .compatible = "amlogic,meson-gxbb-mmc", .data = &meson_gx_data }, + { .compatible = "amlogic,meson-gxl-mmc", .data = &meson_gx_data }, + { .compatible = "amlogic,meson-gxm-mmc", .data = &meson_gx_data }, + { .compatible = "amlogic,meson-axg-mmc", .data = &meson_axg_data }, {} }; MODULE_DEVICE_TABLE(of, meson_mmc_of_match); -- 2.11.0