This patch adds the basic pinmux and gpio support for the Allwinner A20 (sun7i) processor. This code will not been compiled until the build is hooked up in a later patch. It has been split out to keep the patches manageable.
Signed-off-by: Chen-Yu Tsai <w...@csie.org> Signed-off-by: Hans de Goede <hdego...@redhat.com> Signed-off-by: Ma Haijun <mahaij...@gmail.com> Signed-off-by: Oliver Schinagl <oli...@schinagl.nl> Signed-off-by: Henrik Nordström <hen...@henriknordstrom.net> Signed-off-by: Ian Campbell <i...@hellion.org.uk> Reviewed-by: Tom Rini <tr...@ti.com> Cc: Stefan Roese <s...@denx.de> Cc: Tom Cubie <mr.hip...@gmail.com> --- v3: Based on c89867dca2e9 "sunxi: clocks: clock_get_pll5 prototype and coding style". v2: Based on u-boot-sunxi.git#sunxi d9aa5dd3d15c "sunxi: mmc: checkpatch whitespace fixes" with v2014.04-rc2 merged in: - Additional pin definitions v1: Based on u-boot-sunxi.git#sunxi commit d854c4de2f57 "arm: Handle .gnu.hash section in ldscripts" vs v2014.01. --- arch/arm/cpu/armv7/sunxi/Makefile | 1 + arch/arm/cpu/armv7/sunxi/pinmux.c | 61 ++++++++++++++ arch/arm/include/asm/arch-sunxi/gpio.h | 147 +++++++++++++++++++++++++++++++++ 3 files changed, 209 insertions(+) create mode 100644 arch/arm/cpu/armv7/sunxi/pinmux.c create mode 100644 arch/arm/include/asm/arch-sunxi/gpio.h diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile index 440d266..529e7ec 100644 --- a/arch/arm/cpu/armv7/sunxi/Makefile +++ b/arch/arm/cpu/armv7/sunxi/Makefile @@ -9,4 +9,5 @@ # obj-y += timer.o obj-y += clock.o +obj-y += pinmux.o obj-$(CONFIG_SUN7I) += clock_sun4i.o diff --git a/arch/arm/cpu/armv7/sunxi/pinmux.c b/arch/arm/cpu/armv7/sunxi/pinmux.c new file mode 100644 index 0000000..1f2843f --- /dev/null +++ b/arch/arm/cpu/armv7/sunxi/pinmux.c @@ -0,0 +1,61 @@ +/* + * (C) Copyright 2007-2011 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie <tangli...@allwinnertech.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/gpio.h> + +int sunxi_gpio_set_cfgpin(u32 pin, u32 val) +{ + u32 bank = GPIO_BANK(pin); + u32 index = GPIO_CFG_INDEX(pin); + u32 offset = GPIO_CFG_OFFSET(pin); + struct sunxi_gpio *pio = BANK_TO_GPIO(bank); + + clrsetbits_le32(&pio->cfg[0] + index, 0xf << offset, val << offset); + + return 0; +} + +int sunxi_gpio_get_cfgpin(u32 pin) +{ + u32 cfg; + u32 bank = GPIO_BANK(pin); + u32 index = GPIO_CFG_INDEX(pin); + u32 offset = GPIO_CFG_OFFSET(pin); + struct sunxi_gpio *pio = BANK_TO_GPIO(bank); + + cfg = readl(&pio->cfg[0] + index); + cfg >>= offset; + + return cfg & 0xf; +} + +int sunxi_gpio_set_drv(u32 pin, u32 val) +{ + u32 bank = GPIO_BANK(pin); + u32 index = GPIO_DRV_INDEX(pin); + u32 offset = GPIO_DRV_OFFSET(pin); + struct sunxi_gpio *pio = BANK_TO_GPIO(bank); + + clrsetbits_le32(&pio->drv[0] + index, 0x3 << offset, val << offset); + + return 0; +} + +int sunxi_gpio_set_pull(u32 pin, u32 val) +{ + u32 bank = GPIO_BANK(pin); + u32 index = GPIO_PULL_INDEX(pin); + u32 offset = GPIO_PULL_OFFSET(pin); + struct sunxi_gpio *pio = BANK_TO_GPIO(bank); + + clrsetbits_le32(&pio->pull[0] + index, 0x3 << offset, val << offset); + + return 0; +} diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h new file mode 100644 index 0000000..892479c --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/gpio.h @@ -0,0 +1,147 @@ +/* + * (C) Copyright 2007-2012 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie <tangli...@allwinnertech.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _SUNXI_GPIO_H +#define _SUNXI_GPIO_H + +#include <linux/types.h> + +/* + * sunxi has 9 banks of gpio, they are: + * PA0 - PA17 | PB0 - PB23 | PC0 - PC24 + * PD0 - PD27 | PE0 - PE31 | PF0 - PF5 + * PG0 - PG9 | PH0 - PH27 | PI0 - PI12 + */ + +#define SUNXI_GPIO_A 0 +#define SUNXI_GPIO_B 1 +#define SUNXI_GPIO_C 2 +#define SUNXI_GPIO_D 3 +#define SUNXI_GPIO_E 4 +#define SUNXI_GPIO_F 5 +#define SUNXI_GPIO_G 6 +#define SUNXI_GPIO_H 7 +#define SUNXI_GPIO_I 8 +#define SUNXI_GPIO_BANKS 9 + +struct sunxi_gpio { + u32 cfg[4]; + u32 dat; + u32 drv[2]; + u32 pull[2]; +}; + +/* gpio interrupt control */ +struct sunxi_gpio_int { + u32 cfg[3]; + u32 ctl; + u32 sta; + u32 deb; /* interrupt debounce */ +}; + +struct sunxi_gpio_reg { + struct sunxi_gpio gpio_bank[SUNXI_GPIO_BANKS]; + u8 res[0xbc]; + struct sunxi_gpio_int gpio_int; +}; + +#define BANK_TO_GPIO(bank) \ + &((struct sunxi_gpio_reg *)SUNXI_PIO_BASE)->gpio_bank[bank] + +#define GPIO_BANK(pin) ((pin) >> 5) +#define GPIO_NUM(pin) ((pin) & 0x1f) + +#define GPIO_CFG_INDEX(pin) (((pin) & 0x1f) >> 3) +#define GPIO_CFG_OFFSET(pin) ((((pin) & 0x1f) & 0x7) << 2) + +#define GPIO_DRV_INDEX(pin) (((pin) & 0x1f) >> 4) +#define GPIO_DRV_OFFSET(pin) ((((pin) & 0x1f) & 0xf) << 1) + +#define GPIO_PULL_INDEX(pin) (((pin) & 0x1f) >> 4) +#define GPIO_PULL_OFFSET(pin) ((((pin) & 0x1f) & 0xf) << 1) + +/* GPIO bank sizes */ +#define SUNXI_GPIO_A_NR 32 +#define SUNXI_GPIO_B_NR 32 +#define SUNXI_GPIO_C_NR 32 +#define SUNXI_GPIO_D_NR 32 +#define SUNXI_GPIO_E_NR 32 +#define SUNXI_GPIO_F_NR 32 +#define SUNXI_GPIO_G_NR 32 +#define SUNXI_GPIO_H_NR 32 +#define SUNXI_GPIO_I_NR 32 + +#define SUNXI_GPIO_NEXT(__gpio) \ + ((__gpio##_START) + (__gpio##_NR) + 0) + +enum sunxi_gpio_number { + SUNXI_GPIO_A_START = 0, + SUNXI_GPIO_B_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_A), + SUNXI_GPIO_C_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_B), + SUNXI_GPIO_D_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_C), + SUNXI_GPIO_E_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_D), + SUNXI_GPIO_F_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_E), + SUNXI_GPIO_G_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_F), + SUNXI_GPIO_H_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_G), + SUNXI_GPIO_I_START = SUNXI_GPIO_NEXT(SUNXI_GPIO_H), +}; + +/* SUNXI GPIO number definitions */ +#define SUNXI_GPA(_nr) (SUNXI_GPIO_A_START + (_nr)) +#define SUNXI_GPB(_nr) (SUNXI_GPIO_B_START + (_nr)) +#define SUNXI_GPC(_nr) (SUNXI_GPIO_C_START + (_nr)) +#define SUNXI_GPD(_nr) (SUNXI_GPIO_D_START + (_nr)) +#define SUNXI_GPE(_nr) (SUNXI_GPIO_E_START + (_nr)) +#define SUNXI_GPF(_nr) (SUNXI_GPIO_F_START + (_nr)) +#define SUNXI_GPG(_nr) (SUNXI_GPIO_G_START + (_nr)) +#define SUNXI_GPH(_nr) (SUNXI_GPIO_H_START + (_nr)) +#define SUNXI_GPI(_nr) (SUNXI_GPIO_I_START + (_nr)) + +/* GPIO pin function config */ +#define SUNXI_GPIO_INPUT 0 +#define SUNXI_GPIO_OUTPUT 1 + +#define SUNXI_GPA0_EMAC 2 +#define SUN7I_GPA0_GMAC 5 + +#define SUNXI_GPB0_TWI0 2 + +#define SUN4I_GPB22_UART0_TX 2 +#define SUN4I_GPB23_UART0_RX 2 + +#define SUN5I_GPB19_UART0_TX 2 +#define SUN5I_GPB20_UART0_RX 2 + +#define SUN5I_GPG3_UART1_TX 4 +#define SUN5I_GPG4_UART1_RX 4 + +#define SUNXI_GPC6_SDC2 3 + +#define SUNXI_GPF0_SDC0 2 + +#define SUNXI_GPF2_SDC0 2 +#define SUNXI_GPF2_UART0_TX 4 +#define SUNXI_GPF4_UART0_RX 4 + +#define SUN4I_GPG0_SDC1 4 + +#define SUN4I_GPH22_SDC1 5 + +#define SUN4I_GPI4_SDC3 2 + +/* GPIO pin pull-up/down config */ +#define SUNXI_GPIO_PULL_DISABLE 0 +#define SUNXI_GPIO_PULL_UP 1 +#define SUNXI_GPIO_PULL_DOWN 2 + +int sunxi_gpio_set_cfgpin(u32 pin, u32 val); +int sunxi_gpio_get_cfgpin(u32 pin); +int sunxi_gpio_set_drv(u32 pin, u32 val); +int sunxi_gpio_set_pull(u32 pin, u32 val); + +#endif /* _SUNXI_GPIO_H */ -- 1.9.0 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. 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