diff options
| -rw-r--r-- | drivers/gpio/gpio-aspeed.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c index 5d583cc9cbc7..208f95fb585e 100644 --- a/drivers/gpio/gpio-aspeed.c +++ b/drivers/gpio/gpio-aspeed.c @@ -30,6 +30,27 @@ #include <linux/gpio/consumer.h> #include "gpiolib.h" +/* Non-constant mask variant of FIELD_GET() and FIELD_PREP() */ +#define field_get(_mask, _reg) (((_reg) & (_mask)) >> (ffs(_mask) - 1)) +#define field_prep(_mask, _val) (((_val) << (ffs(_mask) - 1)) & (_mask)) + +#define GPIO_G7_IRQ_STS_BASE 0x100 +#define GPIO_G7_IRQ_STS_OFFSET(x) (GPIO_G7_IRQ_STS_BASE + (x) * 0x4) +#define GPIO_G7_CTRL_REG_BASE 0x180 +#define GPIO_G7_CTRL_REG_OFFSET(x) (GPIO_G7_CTRL_REG_BASE + (x) * 0x4) +#define GPIO_G7_CTRL_OUT_DATA BIT(0) +#define GPIO_G7_CTRL_DIR BIT(1) +#define GPIO_G7_CTRL_IRQ_EN BIT(2) +#define GPIO_G7_CTRL_IRQ_TYPE0 BIT(3) +#define GPIO_G7_CTRL_IRQ_TYPE1 BIT(4) +#define GPIO_G7_CTRL_IRQ_TYPE2 BIT(5) +#define GPIO_G7_CTRL_RST_TOLERANCE BIT(6) +#define GPIO_G7_CTRL_DEBOUNCE_SEL1 BIT(7) +#define GPIO_G7_CTRL_DEBOUNCE_SEL2 BIT(8) +#define GPIO_G7_CTRL_INPUT_MASK BIT(9) +#define GPIO_G7_CTRL_IRQ_STS BIT(12) +#define GPIO_G7_CTRL_IN_DATA BIT(13) + struct aspeed_bank_props { unsigned int bank; u32 input; @@ -95,6 +116,22 @@ struct aspeed_gpio_bank { */ static const int debounce_timers[4] = { 0x00, 0x50, 0x54, 0x58 }; +static const int g7_debounce_timers[4] = { 0x00, 0x00, 0x04, 0x08 }; + +/* + * The debounce timers array is used to configure the debounce timer settings.Here’s how it works: + * Array Value: Indicates the offset for configuring the debounce timer. + * Array Index: Corresponds to the debounce setting register. + * The debounce timers array follows this pattern for configuring the debounce setting registers: + * Array Index 0: No debounce timer is set; + * Array Value is irrelevant (don’t care). + * Array Index 1: Debounce setting #2 is set to 1, and debounce setting #1 is set to 0. + * Array Value: offset for configuring debounce timer 0 (g4: 0x50, g7: 0x00) + * Array Index 2: Debounce setting #2 is set to 0, and debounce setting #1 is set to 1. + * Array Value: offset for configuring debounce timer 1 (g4: 0x54, g7: 0x04) + * Array Index 3: Debounce setting #2 is set to 1, and debounce setting #1 is set to 1. + * Array Value: offset for configuring debounce timer 2 (g4: 0x58, g7: 0x8) + */ static const struct aspeed_gpio_copro_ops *copro_ops; static void *copro_data; @@ -250,6 +287,39 @@ static void __iomem *aspeed_gpio_g4_bank_reg(struct aspeed_gpio *gpio, BUG(); } +static u32 aspeed_gpio_g7_reg_mask(const enum aspeed_gpio_reg reg) +{ + switch (reg) { + case reg_val: + return GPIO_G7_CTRL_OUT_DATA; + case reg_dir: + return GPIO_G7_CTRL_DIR; + case reg_irq_enable: + return GPIO_G7_CTRL_IRQ_EN; + case reg_irq_type0: + return GPIO_G7_CTRL_IRQ_TYPE0; + case reg_irq_type1: + return GPIO_G7_CTRL_IRQ_TYPE1; + case reg_irq_type2: + return GPIO_G7_CTRL_IRQ_TYPE2; + case reg_tolerance: + return GPIO_G7_CTRL_RST_TOLERANCE; + case reg_debounce_sel1: + return GPIO_G7_CTRL_DEBOUNCE_SEL1; + case reg_debounce_sel2: + return GPIO_G7_CTRL_DEBOUNCE_SEL2; + case reg_rdata: + return GPIO_G7_CTRL_OUT_DATA; + case reg_irq_status: + return GPIO_G7_CTRL_IRQ_STS; + case reg_cmdsrc0: + case reg_cmdsrc1: + default: + WARN_ON_ONCE(1); + return 0; + } +} + #define GPIO_BANK(x) ((x) >> 5) #define GPIO_OFFSET(x) ((x) & 0x1f) #define GPIO_BIT(x) BIT(GPIO_OFFSET(x)) @@ -1106,6 +1176,59 @@ static const struct aspeed_gpio_llops aspeed_g4_llops = { .copro_request = aspeed_g4_copro_request, .copro_release = aspeed_g4_copro_release, }; + +static void aspeed_g7_reg_bit_set(struct aspeed_gpio *gpio, unsigned int offset, + const enum aspeed_gpio_reg reg, bool val) +{ + u32 mask = aspeed_gpio_g7_reg_mask(reg); + void __iomem *addr = gpio->base + GPIO_G7_CTRL_REG_OFFSET(offset); + u32 write_val; + + if (mask) { + write_val = (ioread32(addr) & ~(mask)) | field_prep(mask, val); + iowrite32(write_val, addr); + } +} + +static bool aspeed_g7_reg_bit_get(struct aspeed_gpio *gpio, unsigned int offset, + const enum aspeed_gpio_reg reg) +{ + u32 mask = aspeed_gpio_g7_reg_mask(reg); + void __iomem *addr; + + addr = gpio->base + GPIO_G7_CTRL_REG_OFFSET(offset); + if (reg == reg_val) + mask = GPIO_G7_CTRL_IN_DATA; + + if (mask) + return field_get(mask, ioread32(addr)); + else + return 0; +} + +static int aspeed_g7_reg_bank_get(struct aspeed_gpio *gpio, unsigned int offset, + const enum aspeed_gpio_reg reg) +{ + void __iomem *addr; + + if (reg == reg_irq_status) { + addr = gpio->base + GPIO_G7_IRQ_STS_OFFSET(offset >> 5); + return ioread32(addr); + } else { + return -EOPNOTSUPP; + } +} + +static const struct aspeed_gpio_llops aspeed_g7_llops = { + .reg_bit_set = aspeed_g7_reg_bit_set, + .reg_bit_get = aspeed_g7_reg_bit_get, + .reg_bank_get = aspeed_g7_reg_bank_get, + .privilege_ctrl = NULL, + .privilege_init = NULL, + .copro_request = NULL, + .copro_release = NULL, +}; + /* * Any banks not specified in a struct aspeed_bank_props array are assumed to * have the properties: @@ -1173,10 +1296,34 @@ static const struct aspeed_gpio_config ast2600_config = .require_dcache = true, }; +static const struct aspeed_bank_props ast2700_bank_props[] = { + /* input output */ + { 1, 0x0fffffff, 0x0fffffff }, /* E/F/G/H, 4-GPIO hole */ + { 6, 0x00ffffff, 0x00ff0000 }, /* Y/Z/AA */ + {}, +}; + +static const struct aspeed_gpio_config ast2700_config = + /* + * ast2700 has two controllers one with 212 GPIOs and one with 16 GPIOs. + * 216 for simplicity, actual number is 212 (4-GPIO hole in GPIOH) + * We expect ngpio being set in the device tree and this is a fallback + * option. + */ + { + .nr_gpios = 216, + .props = ast2700_bank_props, + .llops = &aspeed_g7_llops, + .debounce_timers_array = g7_debounce_timers, + .debounce_timers_num = ARRAY_SIZE(g7_debounce_timers), + .require_dcache = false, + }; + static const struct of_device_id aspeed_gpio_of_table[] = { { .compatible = "aspeed,ast2400-gpio", .data = &ast2400_config, }, { .compatible = "aspeed,ast2500-gpio", .data = &ast2500_config, }, { .compatible = "aspeed,ast2600-gpio", .data = &ast2600_config, }, + { .compatible = "aspeed,ast2700-gpio", .data = &ast2700_config, }, {} }; MODULE_DEVICE_TABLE(of, aspeed_gpio_of_table); |