The Aspeed GPIO driver supports the GPIO controllers found in the AST2400, AST2500 and AST2600 BMC SoCs. The implementation is a cut-down copy of the upstream Linux kernel driver, adapted for u-boot.

Signed-off-by: Andrew Jeffery andrew@aj.id.au --- drivers/gpio/Kconfig | 7 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-aspeed.c | 299 +++++++++++++++++++++++++++++++++++++ 3 files changed, 307 insertions(+) create mode 100644 drivers/gpio/gpio-aspeed.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 8d0e47c67d9e..f7fb8b519eca 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -126,6 +126,13 @@ config ATMEL_PIO4 may be dedicated as a general purpose I/O or be assigned to a function of an embedded peripheral.

+config ASPEED_GPIO + bool "Aspeed GPIO Driver" + help + Say yes here to support the Aspeed GPIO driver. The controller + is found in the AST2400, AST2500 and AST2600 BMC SoCs and + provides access to over 200 GPIOs on each chip. + config DA8XX_GPIO bool "DA8xx GPIO Driver" help diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 63e9be6034f2..720297952cdd 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_$(SPL_TPL_)DM_GPIO) += gpio-uclass.o

obj-$(CONFIG_$(SPL_)DM_PCA953X) += pca953x_gpio.o

+obj-$(CONFIG_ASPEED_GPIO) += gpio-aspeed.o obj-$(CONFIG_AT91_GPIO) += at91_gpio.o obj-$(CONFIG_ATMEL_PIO4) += atmel_pio4.o obj-$(CONFIG_BCM6345_GPIO) += bcm6345_gpio.o diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c new file mode 100644 index 000000000000..a8a2afcb5c85 --- /dev/null +++ b/drivers/gpio/gpio-aspeed.c @@ -0,0 +1,299 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2015 IBM Corp. + * Joel Stanley joel@jms.id.au + * Ryan Chen ryan_chen@aspeedtech.com + * + * Implementation extracted from the Linux kernel and adapted for u-boot. + */ +#include <common.h> +#include <asm/io.h> +#include <asm/gpio.h> + +#include <config.h> +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <asm/io.h> +#include <linux/bug.h> +#include <linux/sizes.h> + +struct aspeed_gpio_priv { + void *regs; +}; + +struct aspeed_gpio_bank { + u16 val_regs; /* +0: Rd: read input value, Wr: set write latch + * +4: Rd/Wr: Direction (0=in, 1=out) + */ + u16 rdata_reg; /* Rd: read write latch, Wr: <none> */ + u16 irq_regs; + u16 debounce_regs; + u16 tolerance_regs; + u16 cmdsrc_regs; + const char names[4][3]; +}; + +static const struct aspeed_gpio_bank aspeed_gpio_banks[] = { + { + .val_regs = 0x0000, + .rdata_reg = 0x00c0, + .irq_regs = 0x0008, + .debounce_regs = 0x0040, + .tolerance_regs = 0x001c, + .cmdsrc_regs = 0x0060, + .names = { "A", "B", "C", "D" }, + }, + { + .val_regs = 0x0020, + .rdata_reg = 0x00c4, + .irq_regs = 0x0028, + .debounce_regs = 0x0048, + .tolerance_regs = 0x003c, + .cmdsrc_regs = 0x0068, + .names = { "E", "F", "G", "H" }, + }, + { + .val_regs = 0x0070, + .rdata_reg = 0x00c8, + .irq_regs = 0x0098, + .debounce_regs = 0x00b0, + .tolerance_regs = 0x00ac, + .cmdsrc_regs = 0x0090, + .names = { "I", "J", "K", "L" }, + }, + { + .val_regs = 0x0078, + .rdata_reg = 0x00cc, + .irq_regs = 0x00e8, + .debounce_regs = 0x0100, + .tolerance_regs = 0x00fc, + .cmdsrc_regs = 0x00e0, + .names = { "M", "N", "O", "P" }, + }, + { + .val_regs = 0x0080, + .rdata_reg = 0x00d0, + .irq_regs = 0x0118, + .debounce_regs = 0x0130, + .tolerance_regs = 0x012c, + .cmdsrc_regs = 0x0110, + .names = { "Q", "R", "S", "T" }, + }, + { + .val_regs = 0x0088, + .rdata_reg = 0x00d4, + .irq_regs = 0x0148, + .debounce_regs = 0x0160, + .tolerance_regs = 0x015c, + .cmdsrc_regs = 0x0140, + .names = { "U", "V", "W", "X" }, + }, + { + .val_regs = 0x01E0, + .rdata_reg = 0x00d8, + .irq_regs = 0x0178, + .debounce_regs = 0x0190, + .tolerance_regs = 0x018c, + .cmdsrc_regs = 0x0170, + .names = { "Y", "Z", "AA", "AB" }, + }, + { + .val_regs = 0x01e8, + .rdata_reg = 0x00dc, + .irq_regs = 0x01a8, + .debounce_regs = 0x01c0, + .tolerance_regs = 0x01bc, + .cmdsrc_regs = 0x01a0, + .names = { "AC", "", "", "" }, + }, +}; + +enum aspeed_gpio_reg { + reg_val, + reg_rdata, + reg_dir, + reg_irq_enable, + reg_irq_type0, + reg_irq_type1, + reg_irq_type2, + reg_irq_status, + reg_debounce_sel1, + reg_debounce_sel2, + reg_tolerance, + reg_cmdsrc0, + reg_cmdsrc1, +}; + +#define GPIO_VAL_VALUE 0x00 +#define GPIO_VAL_DIR 0x04 + +#define GPIO_IRQ_ENABLE 0x00 +#define GPIO_IRQ_TYPE0 0x04 +#define GPIO_IRQ_TYPE1 0x08 +#define GPIO_IRQ_TYPE2 0x0c +#define GPIO_IRQ_STATUS 0x10 + +#define GPIO_DEBOUNCE_SEL1 0x00 +#define GPIO_DEBOUNCE_SEL2 0x04 + +#define GPIO_CMDSRC_0 0x00 +#define GPIO_CMDSRC_1 0x04 +#define GPIO_CMDSRC_ARM 0 +#define GPIO_CMDSRC_LPC 1 +#define GPIO_CMDSRC_COLDFIRE 2 +#define GPIO_CMDSRC_RESERVED 3 + +/* This will be resolved at compile time */ +static inline void __iomem *bank_reg(struct aspeed_gpio_priv *gpio, + const struct aspeed_gpio_bank *bank, + const enum aspeed_gpio_reg reg) +{ + switch (reg) { + case reg_val: + return gpio->regs + bank->val_regs + GPIO_VAL_VALUE; + case reg_rdata: + return gpio->regs + bank->rdata_reg; + case reg_dir: + return gpio->regs + bank->val_regs + GPIO_VAL_DIR; + case reg_irq_enable: + return gpio->regs + bank->irq_regs + GPIO_IRQ_ENABLE; + case reg_irq_type0: + return gpio->regs + bank->irq_regs + GPIO_IRQ_TYPE0; + case reg_irq_type1: + return gpio->regs + bank->irq_regs + GPIO_IRQ_TYPE1; + case reg_irq_type2: + return gpio->regs + bank->irq_regs + GPIO_IRQ_TYPE2; + case reg_irq_status: + return gpio->regs + bank->irq_regs + GPIO_IRQ_STATUS; + case reg_debounce_sel1: + return gpio->regs + bank->debounce_regs + GPIO_DEBOUNCE_SEL1; + case reg_debounce_sel2: + return gpio->regs + bank->debounce_regs + GPIO_DEBOUNCE_SEL2; + case reg_tolerance: + return gpio->regs + bank->tolerance_regs; + case reg_cmdsrc0: + return gpio->regs + bank->cmdsrc_regs + GPIO_CMDSRC_0; + case reg_cmdsrc1: + return gpio->regs + bank->cmdsrc_regs + GPIO_CMDSRC_1; + } + BUG(); +} + +#define GPIO_BANK(x) ((x) >> 5) +#define GPIO_OFFSET(x) ((x) & 0x1f) +#define GPIO_BIT(x) BIT(GPIO_OFFSET(x)) + +static const struct aspeed_gpio_bank *to_bank(unsigned int offset) +{ + unsigned int bank = GPIO_BANK(offset); + + WARN_ON(bank >= ARRAY_SIZE(aspeed_gpio_banks)); + return &aspeed_gpio_banks[bank]; +} + +static int +aspeed_gpio_direction_input(struct udevice *dev, unsigned int offset) +{ + struct aspeed_gpio_priv *priv = dev_get_priv(dev); + const struct aspeed_gpio_bank *bank = to_bank(offset); + u32 dir = readl(bank_reg(priv, bank, reg_dir)); + + dir &= ~GPIO_BIT(offset); + writel(dir, bank_reg(priv, bank, reg_dir)); + + return 0; +} + +static int aspeed_gpio_direction_output(struct udevice *dev, unsigned int offset, + int value) +{ + struct aspeed_gpio_priv *priv = dev_get_priv(dev); + const struct aspeed_gpio_bank *bank = to_bank(offset); + u32 dir = readl(bank_reg(priv, bank, reg_dir)); + u32 output = readl(bank_reg(priv, bank, reg_val)); + + dir |= GPIO_BIT(offset); + writel(dir, bank_reg(priv, bank, reg_dir)); + + if (value) + output |= GPIO_BIT(offset); + else + output &= ~GPIO_BIT(offset); + + writel(output, bank_reg(priv, bank, reg_val)); + + return 0; +} + +static int aspeed_gpio_get_value(struct udevice *dev, unsigned int offset) +{ + struct aspeed_gpio_priv *priv = dev_get_priv(dev); + const struct aspeed_gpio_bank *bank = to_bank(offset); + + return !!(readl(bank_reg(priv, bank, reg_val)) & GPIO_BIT(offset)); +} + +static int +aspeed_gpio_set_value(struct udevice *dev, unsigned int offset, int value) +{ + struct aspeed_gpio_priv *priv = dev_get_priv(dev); + const struct aspeed_gpio_bank *bank = to_bank(offset); + u32 data = readl(bank_reg(priv, bank, reg_val)); + + if (value) + data |= GPIO_BIT(offset); + else + data &= ~GPIO_BIT(offset); + + writel(data, bank_reg(priv, bank, reg_val)); + + return 0; +} + +static int aspeed_gpio_get_function(struct udevice *dev, unsigned int offset) +{ + struct aspeed_gpio_priv *priv = dev_get_priv(dev); + const struct aspeed_gpio_bank *bank = to_bank(offset); + + if (readl(bank_reg(priv, bank, reg_dir)) & GPIO_BIT(offset)) + return GPIOF_OUTPUT; + + return GPIOF_INPUT; +} + +static const struct dm_gpio_ops aspeed_gpio_ops = { + .direction_input = aspeed_gpio_direction_input, + .direction_output = aspeed_gpio_direction_output, + .get_value = aspeed_gpio_get_value, + .set_value = aspeed_gpio_set_value, + .get_function = aspeed_gpio_get_function, +}; + +static int aspeed_gpio_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + struct aspeed_gpio_priv *priv = dev_get_priv(dev); + + uc_priv->bank_name = dev->name; + ofnode_read_u32(dev_ofnode(dev), "ngpios", &uc_priv->gpio_count); + priv->regs = devfdt_get_addr_ptr(dev); + + return 0; +} + +static const struct udevice_id aspeed_gpio_ids[] = { + { .compatible = "aspeed,ast2400-gpio", }, + { .compatible = "aspeed,ast2500-gpio", }, + { .compatible = "aspeed,ast2600-gpio", }, + { } +}; + +U_BOOT_DRIVER(gpio_aspeed) = { + .name = "gpio-aspeed", + .id = UCLASS_GPIO, + .of_match = aspeed_gpio_ids, + .ops = &aspeed_gpio_ops, + .probe = aspeed_gpio_probe, + .priv_auto = sizeof(struct aspeed_gpio_priv), +};

Populate gpio_count in the gpio subsystem for the AST2500.

Signed-off-by: Andrew Jeffery andrew@aj.id.au --- arch/arm/dts/ast2500.dtsi | 1 + 1 file changed, 1 insertion(+)

diff --git a/arch/arm/dts/ast2500.dtsi b/arch/arm/dts/ast2500.dtsi index 98359bf92425..ee66ef67042b 100644 --- a/arch/arm/dts/ast2500.dtsi +++ b/arch/arm/dts/ast2500.dtsi @@ -214,6 +214,7 @@ reg = <0x1e780000 0x1000>; interrupts = <20>; gpio-ranges = <&pinctrl 0 0 220>; + ngpios = <228>; interrupt-controller; };

Build in the driver for the Aspeed GPIO controller and turn on the `gpio` shell command.

Signed-off-by: Andrew Jeffery andrew@aj.id.au --- configs/evb-ast2500_defconfig | 3 +++ configs/evb-ast2600_defconfig | 3 +++ 2 files changed, 6 insertions(+)

diff --git a/configs/evb-ast2500_defconfig b/configs/evb-ast2500_defconfig index ea001851cac1..26743fc8f5a6 100644 --- a/configs/evb-ast2500_defconfig +++ b/configs/evb-ast2500_defconfig @@ -7,6 +7,7 @@ CONFIG_SYS_MALLOC_F_LEN=0x2000 CONFIG_TARGET_EVB_AST2500=y CONFIG_NR_DRAM_BANKS=1 CONFIG_ENV_SIZE=0x20000 +CONFIG_DM_GPIO=y CONFIG_DEFAULT_DEVICE_TREE="ast2500-evb" CONFIG_PRE_CON_BUF_ADDR=0x1e720000 CONFIG_SYS_LOAD_ADDR=0x83000000 @@ -18,6 +19,7 @@ CONFIG_PRE_CONSOLE_BUFFER=y # CONFIG_DISPLAY_CPUINFO is not set CONFIG_HUSH_PARSER=y # CONFIG_AUTO_COMPLETE is not set +CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_CMD_MMC=y CONFIG_CMD_DHCP=y @@ -28,6 +30,7 @@ CONFIG_SYS_RELOC_GD_ENV_ADDR=y CONFIG_NET_RANDOM_ETHADDR=y CONFIG_REGMAP=y CONFIG_CLK=y +CONFIG_ASPEED_GPIO=y CONFIG_DM_I2C=y CONFIG_SYS_I2C_ASPEED=y CONFIG_MMC_SDHCI=y diff --git a/configs/evb-ast2600_defconfig b/configs/evb-ast2600_defconfig index 172b08e63ccb..1c58f34079e3 100644 --- a/configs/evb-ast2600_defconfig +++ b/configs/evb-ast2600_defconfig @@ -11,6 +11,7 @@ CONFIG_SPL_LIBCOMMON_SUPPORT=y CONFIG_SPL_LIBGENERIC_SUPPORT=y CONFIG_NR_DRAM_BANKS=1 CONFIG_ENV_SIZE=0x10000 +CONFIG_DM_GPIO=y CONFIG_DEFAULT_DEVICE_TREE="ast2600-evb" CONFIG_SPL_SERIAL=y CONFIG_SPL_STACK_R_ADDR=0x83000000 @@ -39,6 +40,7 @@ CONFIG_SPL_DM_RESET=y CONFIG_SPL_RAM_SUPPORT=y CONFIG_SPL_RAM_DEVICE=y CONFIG_HUSH_PARSER=y +CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_CMD_MMC=y CONFIG_CMD_DHCP=y @@ -57,6 +59,7 @@ CONFIG_SPL_CLK=y CONFIG_DM_HASH=y CONFIG_HASH_ASPEED=y CONFIG_ASPEED_ACRY=y +CONFIG_ASPEED_GPIO=y CONFIG_DM_I2C=y CONFIG_MISC=y CONFIG_SPL_MISC=y