diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/spi/sun4i_spi.c | 101 |
2 files changed, 102 insertions, 3 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index ac7fbab841..15207d23c1 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -223,9 +223,9 @@ config STM32_QSPI this ST IP core. config SUN4I_SPI - bool "Allwinner A10 SoCs SPI controller" + bool "Allwinner A10/A31 SoCs SPI controller" help - SPI driver for Allwinner sun4i, sun5i and sun7i SoCs + This enables using the SPI controller on the Allwinner A10/A31 SoCs. config TEGRA114_SPI bool "nVidia Tegra114 SPI driver" diff --git a/drivers/spi/sun4i_spi.c b/drivers/spi/sun4i_spi.c index 4324d686eb..da9984c004 100644 --- a/drivers/spi/sun4i_spi.c +++ b/drivers/spi/sun4i_spi.c @@ -24,6 +24,7 @@ #include <spi.h> #include <errno.h> #include <fdt_support.h> +#include <reset.h> #include <wait_bit.h> #include <asm/bitops.h> @@ -84,6 +85,18 @@ #define SUN4I_FIFO_STA_TF_CNT_MASK 0x7f #define SUN4I_FIFO_STA_TF_CNT_BITS 16 +/* sun6i spi registers */ +#define SUN6I_GBL_CTL_REG 0x04 +#define SUN6I_TFR_CTL_REG 0x08 +#define SUN6I_FIFO_CTL_REG 0x18 +#define SUN6I_FIFO_STA_REG 0x1c +#define SUN6I_CLK_CTL_REG 0x24 +#define SUN6I_BURST_CNT_REG 0x30 +#define SUN6I_XMIT_CNT_REG 0x34 +#define SUN6I_BURST_CTL_REG 0x38 +#define SUN6I_TXDATA_REG 0x200 +#define SUN6I_RXDATA_REG 0x300 + #define SUN4I_SPI_MAX_RATE 24000000 #define SUN4I_SPI_MIN_RATE 3000 #define SUN4I_SPI_DEFAULT_RATE 1000000 @@ -112,6 +125,7 @@ enum sun4i_spi_regs { /* sun spi register bits */ enum sun4i_spi_bits { SPI_GCR_TP, + SPI_GCR_SRST, SPI_TCR_CPHA, SPI_TCR_CPOL, SPI_TCR_CS_ACTIVE_LOW, @@ -129,6 +143,8 @@ struct sun4i_spi_variant { const unsigned long *regs; const u32 *bits; u32 fifo_depth; + bool has_soft_reset; + bool has_burst_ctl; }; struct sun4i_spi_platdata { @@ -140,6 +156,7 @@ struct sun4i_spi_platdata { struct sun4i_spi_priv { struct sun4i_spi_variant *variant; struct clk clk_ahb, clk_mod; + struct reset_ctl reset; u32 base_addr; u32 freq; u32 mode; @@ -258,7 +275,10 @@ static int sun4i_spi_parse_pins(struct udevice *dev) if (pin < 0) break; - sunxi_gpio_set_cfgpin(pin, SUNXI_GPC_SPI0); + if (IS_ENABLED(CONFIG_MACH_SUN50I)) + sunxi_gpio_set_cfgpin(pin, SUN50I_GPC_SPI0); + else + sunxi_gpio_set_cfgpin(pin, SUNXI_GPC_SPI0); sunxi_gpio_set_drv(pin, drive); sunxi_gpio_set_pull(pin, pull); } @@ -274,6 +294,8 @@ static inline int sun4i_spi_set_clock(struct udevice *dev, bool enable) if (!enable) { clk_disable(&priv->clk_ahb); clk_disable(&priv->clk_mod); + if (reset_valid(&priv->reset)) + reset_assert(&priv->reset); return 0; } @@ -289,8 +311,18 @@ static inline int sun4i_spi_set_clock(struct udevice *dev, bool enable) goto err_ahb; } + if (reset_valid(&priv->reset)) { + ret = reset_deassert(&priv->reset); + if (ret) { + dev_err(dev, "failed to deassert reset\n"); + goto err_mod; + } + } + return 0; +err_mod: + clk_disable(&priv->clk_mod); err_ahb: clk_disable(&priv->clk_ahb); return ret; @@ -331,6 +363,12 @@ static int sun4i_spi_probe(struct udevice *bus) return ret; } + ret = reset_get_by_index(bus, 0, &priv->reset); + if (ret && ret != -ENOENT) { + dev_err(dev, "failed to get reset\n"); + return ret; + } + sun4i_spi_parse_pins(bus); priv->variant = plat->variant; @@ -352,6 +390,10 @@ static int sun4i_spi_claim_bus(struct udevice *dev) setbits_le32(SPI_REG(priv, SPI_GCR), SUN4I_CTL_ENABLE | SUN4I_CTL_MASTER | SPI_BIT(priv, SPI_GCR_TP)); + if (priv->variant->has_soft_reset) + setbits_le32(SPI_REG(priv, SPI_GCR), + SPI_BIT(priv, SPI_GCR_SRST)); + setbits_le32(SPI_REG(priv, SPI_TCR), SPI_BIT(priv, SPI_TCR_CS_MANUAL) | SPI_BIT(priv, SPI_TCR_CS_ACTIVE_LOW)); @@ -404,6 +446,10 @@ static int sun4i_spi_xfer(struct udevice *dev, unsigned int bitlen, writel(SUN4I_BURST_CNT(nbytes), SPI_REG(priv, SPI_BC)); writel(SUN4I_XMIT_CNT(nbytes), SPI_REG(priv, SPI_TC)); + if (priv->variant->has_burst_ctl) + writel(SUN4I_BURST_CNT(nbytes), + SPI_REG(priv, SPI_BCTL)); + /* Fill the TX FIFO */ sun4i_spi_fill_fifo(priv, nbytes); @@ -539,17 +585,70 @@ static const u32 sun4i_spi_bits[] = { [SPI_FSR_RF_CNT_MASK] = GENMASK(6, 0), }; +static const unsigned long sun6i_spi_regs[] = { + [SPI_GCR] = SUN6I_GBL_CTL_REG, + [SPI_TCR] = SUN6I_TFR_CTL_REG, + [SPI_FCR] = SUN6I_FIFO_CTL_REG, + [SPI_FSR] = SUN6I_FIFO_STA_REG, + [SPI_CCR] = SUN6I_CLK_CTL_REG, + [SPI_BC] = SUN6I_BURST_CNT_REG, + [SPI_TC] = SUN6I_XMIT_CNT_REG, + [SPI_BCTL] = SUN6I_BURST_CTL_REG, + [SPI_TXD] = SUN6I_TXDATA_REG, + [SPI_RXD] = SUN6I_RXDATA_REG, +}; + +static const u32 sun6i_spi_bits[] = { + [SPI_GCR_TP] = BIT(7), + [SPI_GCR_SRST] = BIT(31), + [SPI_TCR_CPHA] = BIT(0), + [SPI_TCR_CPOL] = BIT(1), + [SPI_TCR_CS_ACTIVE_LOW] = BIT(2), + [SPI_TCR_CS_SEL] = 4, + [SPI_TCR_CS_MASK] = 0x30, + [SPI_TCR_CS_MANUAL] = BIT(6), + [SPI_TCR_CS_LEVEL] = BIT(7), + [SPI_TCR_XCH] = BIT(31), + [SPI_FCR_RF_RST] = BIT(15), + [SPI_FCR_TF_RST] = BIT(31), + [SPI_FSR_RF_CNT_MASK] = GENMASK(7, 0), +}; + static const struct sun4i_spi_variant sun4i_a10_spi_variant = { .regs = sun4i_spi_regs, .bits = sun4i_spi_bits, .fifo_depth = 64, }; +static const struct sun4i_spi_variant sun6i_a31_spi_variant = { + .regs = sun6i_spi_regs, + .bits = sun6i_spi_bits, + .fifo_depth = 128, + .has_soft_reset = true, + .has_burst_ctl = true, +}; + +static const struct sun4i_spi_variant sun8i_h3_spi_variant = { + .regs = sun6i_spi_regs, + .bits = sun6i_spi_bits, + .fifo_depth = 64, + .has_soft_reset = true, + .has_burst_ctl = true, +}; + static const struct udevice_id sun4i_spi_ids[] = { { .compatible = "allwinner,sun4i-a10-spi", .data = (ulong)&sun4i_a10_spi_variant, }, + { + .compatible = "allwinner,sun6i-a31-spi", + .data = (ulong)&sun6i_a31_spi_variant, + }, + { + .compatible = "allwinner,sun8i-h3-spi", + .data = (ulong)&sun8i_h3_spi_variant, + }, { } }; |