X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fgpio%2Fsunxi_gpio.c;h=57b78e55e23b9ef048bb4edd69ad110443ec9384;hb=8a3337161d0fdedcfbe6d6be884f811496feedc1;hp=0c50a8f332684b27194a9985ab2a180780bdab2b;hpb=740f41d3cbefe2068247852220226c2c3b287249;p=u-boot diff --git a/drivers/gpio/sunxi_gpio.c b/drivers/gpio/sunxi_gpio.c index 0c50a8f332..57b78e55e2 100644 --- a/drivers/gpio/sunxi_gpio.c +++ b/drivers/gpio/sunxi_gpio.c @@ -11,9 +11,26 @@ */ #include +#include +#include +#include +#include +#include #include #include +#include +DECLARE_GLOBAL_DATA_PTR; + +#define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR + +struct sunxi_gpio_platdata { + struct sunxi_gpio *regs; + const char *bank_name; /* Name of bank, e.g. "B" */ + int gpio_count; +}; + +#ifndef CONFIG_DM_GPIO static int sunxi_gpio_output(u32 pin, u32 val) { u32 dat; @@ -59,7 +76,7 @@ int gpio_direction_input(unsigned gpio) { sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT); - return sunxi_gpio_input(gpio); + return 0; } int gpio_direction_output(unsigned gpio, int value) @@ -85,6 +102,7 @@ int sunxi_name_to_gpio(const char *name) int groupsize = 9 * 32; long pin; char *eptr; + if (*name == 'P' || *name == 'p') name++; if (*name >= 'A') { @@ -100,3 +118,217 @@ int sunxi_name_to_gpio(const char *name) return -1; return group * 32 + pin; } +#endif + +int sunxi_name_to_gpio_bank(const char *name) +{ + int group = 0; + + if (*name == 'P' || *name == 'p') + name++; + if (*name >= 'A') { + group = *name - (*name > 'a' ? 'a' : 'A'); + return group; + } + + return -1; +} + +#ifdef CONFIG_DM_GPIO +/* TODO(sjg@chromium.org): Remove this function and use device tree */ +int sunxi_name_to_gpio(const char *name) +{ + unsigned int gpio; + int ret; +#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO + char lookup[8]; + + if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) { + sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d", + SUNXI_GPIO_AXP0_VBUS_DETECT); + name = lookup; + } else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) { + sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d", + SUNXI_GPIO_AXP0_VBUS_ENABLE); + name = lookup; + } +#endif + ret = gpio_lookup_name(name, NULL, NULL, &gpio); + + return ret ? ret : gpio; +} + +static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset) +{ + struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); + + sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT); + + return 0; +} + +static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset, + int value) +{ + struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); + u32 num = GPIO_NUM(offset); + + sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT); + clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0); + + return 0; +} + +static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset) +{ + struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); + u32 num = GPIO_NUM(offset); + unsigned dat; + + dat = readl(&plat->regs->dat); + dat >>= num; + + return dat & 0x1; +} + +static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset, + int value) +{ + struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); + u32 num = GPIO_NUM(offset); + + clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0); + return 0; +} + +static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset) +{ + struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); + int func; + + func = sunxi_gpio_get_cfgbank(plat->regs, offset); + if (func == SUNXI_GPIO_OUTPUT) + return GPIOF_OUTPUT; + else if (func == SUNXI_GPIO_INPUT) + return GPIOF_INPUT; + else + return GPIOF_FUNC; +} + +static const struct dm_gpio_ops gpio_sunxi_ops = { + .direction_input = sunxi_gpio_direction_input, + .direction_output = sunxi_gpio_direction_output, + .get_value = sunxi_gpio_get_value, + .set_value = sunxi_gpio_set_value, + .get_function = sunxi_gpio_get_function, +}; + +/** + * Returns the name of a GPIO bank + * + * GPIO banks are named A, B, C, ... + * + * @bank: Bank number (0, 1..n-1) + * @return allocated string containing the name + */ +static char *gpio_bank_name(int bank) +{ + char *name; + + name = malloc(3); + if (name) { + name[0] = 'P'; + name[1] = 'A' + bank; + name[2] = '\0'; + } + + return name; +} + +static int gpio_sunxi_probe(struct udevice *dev) +{ + struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + /* Tell the uclass how many GPIOs we have */ + if (plat) { + uc_priv->gpio_count = plat->gpio_count; + uc_priv->bank_name = plat->bank_name; + } + + return 0; +} +/** + * We have a top-level GPIO device with no actual GPIOs. It has a child + * device for each Sunxi bank. + */ +static int gpio_sunxi_bind(struct udevice *parent) +{ + struct sunxi_gpio_platdata *plat = parent->platdata; + struct sunxi_gpio_reg *ctlr; + int bank, no_banks, ret, start; + + /* If this is a child device, there is nothing to do here */ + if (plat) + return 0; + + if (fdt_node_check_compatible(gd->fdt_blob, parent->of_offset, + "allwinner,sun6i-a31-r-pinctrl") == 0) { + start = 'L' - 'A'; + no_banks = 2; /* L & M */ + } else if (fdt_node_check_compatible(gd->fdt_blob, parent->of_offset, + "allwinner,sun8i-a23-r-pinctrl") == 0) { + start = 'L' - 'A'; + no_banks = 1; /* L only */ + } else { + start = 0; + no_banks = SUNXI_GPIO_BANKS; + } + + ctlr = (struct sunxi_gpio_reg *)fdtdec_get_addr(gd->fdt_blob, + parent->of_offset, "reg"); + for (bank = 0; bank < no_banks; bank++) { + struct sunxi_gpio_platdata *plat; + struct udevice *dev; + + plat = calloc(1, sizeof(*plat)); + if (!plat) + return -ENOMEM; + plat->regs = &ctlr->gpio_bank[bank]; + plat->bank_name = gpio_bank_name(start + bank); + plat->gpio_count = SUNXI_GPIOS_PER_BANK; + + ret = device_bind(parent, parent->driver, + plat->bank_name, plat, -1, &dev); + if (ret) + return ret; + dev->of_offset = parent->of_offset; + } + + return 0; +} + +static const struct udevice_id sunxi_gpio_ids[] = { + { .compatible = "allwinner,sun4i-a10-pinctrl" }, + { .compatible = "allwinner,sun5i-a10s-pinctrl" }, + { .compatible = "allwinner,sun5i-a13-pinctrl" }, + { .compatible = "allwinner,sun6i-a31-pinctrl" }, + { .compatible = "allwinner,sun6i-a31s-pinctrl" }, + { .compatible = "allwinner,sun7i-a20-pinctrl" }, + { .compatible = "allwinner,sun8i-a23-pinctrl" }, + { .compatible = "allwinner,sun8i-a33-pinctrl" }, + { .compatible = "allwinner,sun9i-a80-pinctrl" }, + { .compatible = "allwinner,sun6i-a31-r-pinctrl" }, + { .compatible = "allwinner,sun8i-a23-r-pinctrl" }, + { } +}; + +U_BOOT_DRIVER(gpio_sunxi) = { + .name = "gpio_sunxi", + .id = UCLASS_GPIO, + .ops = &gpio_sunxi_ops, + .of_match = sunxi_gpio_ids, + .bind = gpio_sunxi_bind, + .probe = gpio_sunxi_probe, +}; +#endif