diff options
Diffstat (limited to 'arch/arm/mach-s3c64xx/gpiolib.c')
| -rw-r--r-- | arch/arm/mach-s3c64xx/gpiolib.c | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c64xx/gpiolib.c b/arch/arm/mach-s3c64xx/gpiolib.c new file mode 100644 index 000000000000..66e6794481d2 --- /dev/null +++ b/arch/arm/mach-s3c64xx/gpiolib.c @@ -0,0 +1,288 @@ +/* arch/arm/plat-s3c64xx/gpiolib.c + * + * Copyright 2008 Openmoko, Inc. + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C64XX - GPIOlib support + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/irq.h> +#include <linux/io.h> + +#include <mach/map.h> +#include <mach/gpio.h> + +#include <plat/gpio-core.h> +#include <plat/gpio-cfg.h> +#include <plat/gpio-cfg-helpers.h> +#include <mach/regs-gpio.h> + +/* GPIO bank summary: + * + * Bank GPIOs Style SlpCon ExtInt Group + * A 8 4Bit Yes 1 + * B 7 4Bit Yes 1 + * C 8 4Bit Yes 2 + * D 5 4Bit Yes 3 + * E 5 4Bit Yes None + * F 16 2Bit Yes 4 [1] + * G 7 4Bit Yes 5 + * H 10 4Bit[2] Yes 6 + * I 16 2Bit Yes None + * J 12 2Bit Yes None + * K 16 4Bit[2] No None + * L 15 4Bit[2] No None + * M 6 4Bit No IRQ_EINT + * N 16 2Bit No IRQ_EINT + * O 16 2Bit Yes 7 + * P 15 2Bit Yes 8 + * Q 9 2Bit Yes 9 + * + * [1] BANKF pins 14,15 do not form part of the external interrupt sources + * [2] BANK has two control registers, GPxCON0 and GPxCON1 + */ + +static struct s3c_gpio_cfg gpio_4bit_cfg_noint = { + .set_config = s3c_gpio_setcfg_s3c64xx_4bit, + .set_pull = s3c_gpio_setpull_updown, + .get_pull = s3c_gpio_getpull_updown, +}; + +static struct s3c_gpio_cfg gpio_4bit_cfg_eint0111 = { + .cfg_eint = 7, + .set_config = s3c_gpio_setcfg_s3c64xx_4bit, + .set_pull = s3c_gpio_setpull_updown, + .get_pull = s3c_gpio_getpull_updown, +}; + +static struct s3c_gpio_cfg gpio_4bit_cfg_eint0011 = { + .cfg_eint = 3, + .set_config = s3c_gpio_setcfg_s3c64xx_4bit, + .set_pull = s3c_gpio_setpull_updown, + .get_pull = s3c_gpio_getpull_updown, +}; + +int s3c64xx_gpio2int_gpm(struct gpio_chip *chip, unsigned pin) +{ + return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO; +} + +static struct s3c_gpio_chip gpio_4bit[] = { + { + .base = S3C64XX_GPA_BASE, + .config = &gpio_4bit_cfg_eint0111, + .chip = { + .base = S3C64XX_GPA(0), + .ngpio = S3C64XX_GPIO_A_NR, + .label = "GPA", + }, + }, { + .base = S3C64XX_GPB_BASE, + .config = &gpio_4bit_cfg_eint0111, + .chip = { + .base = S3C64XX_GPB(0), + .ngpio = S3C64XX_GPIO_B_NR, + .label = "GPB", + }, + }, { + .base = S3C64XX_GPC_BASE, + .config = &gpio_4bit_cfg_eint0111, + .chip = { + .base = S3C64XX_GPC(0), + .ngpio = S3C64XX_GPIO_C_NR, + .label = "GPC", + }, + }, { + .base = S3C64XX_GPD_BASE, + .config = &gpio_4bit_cfg_eint0111, + .chip = { + .base = S3C64XX_GPD(0), + .ngpio = S3C64XX_GPIO_D_NR, + .label = "GPD", + }, + }, { + .base = S3C64XX_GPE_BASE, + .config = &gpio_4bit_cfg_noint, + .chip = { + .base = S3C64XX_GPE(0), + .ngpio = S3C64XX_GPIO_E_NR, + .label = "GPE", + }, + }, { + .base = S3C64XX_GPG_BASE, + .config = &gpio_4bit_cfg_eint0111, + .chip = { + .base = S3C64XX_GPG(0), + .ngpio = S3C64XX_GPIO_G_NR, + .label = "GPG", + }, + }, { + .base = S3C64XX_GPM_BASE, + .config = &gpio_4bit_cfg_eint0011, + .chip = { + .base = S3C64XX_GPM(0), + .ngpio = S3C64XX_GPIO_M_NR, + .label = "GPM", + .to_irq = s3c64xx_gpio2int_gpm, + }, + }, +}; + +int s3c64xx_gpio2int_gpl(struct gpio_chip *chip, unsigned pin) +{ + return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO; +} + +static struct s3c_gpio_chip gpio_4bit2[] = { + { + .base = S3C64XX_GPH_BASE + 0x4, + .config = &gpio_4bit_cfg_eint0111, + .chip = { + .base = S3C64XX_GPH(0), + .ngpio = S3C64XX_GPIO_H_NR, + .label = "GPH", + }, + }, { + .base = S3C64XX_GPK_BASE + 0x4, + .config = &gpio_4bit_cfg_noint, + .chip = { + .base = S3C64XX_GPK(0), + .ngpio = S3C64XX_GPIO_K_NR, + .label = "GPK", + }, + }, { + .base = S3C64XX_GPL_BASE + 0x4, + .config = &gpio_4bit_cfg_eint0011, + .chip = { + .base = S3C64XX_GPL(0), + .ngpio = S3C64XX_GPIO_L_NR, + .label = "GPL", + .to_irq = s3c64xx_gpio2int_gpl, + }, + }, +}; + +static struct s3c_gpio_cfg gpio_2bit_cfg_noint = { + .set_config = s3c_gpio_setcfg_s3c24xx, + .set_pull = s3c_gpio_setpull_updown, + .get_pull = s3c_gpio_getpull_updown, +}; + +static struct s3c_gpio_cfg gpio_2bit_cfg_eint10 = { + .cfg_eint = 2, + .set_config = s3c_gpio_setcfg_s3c24xx, + .set_pull = s3c_gpio_setpull_updown, + .get_pull = s3c_gpio_getpull_updown, +}; + +static struct s3c_gpio_cfg gpio_2bit_cfg_eint11 = { + .cfg_eint = 3, + .set_config = s3c_gpio_setcfg_s3c24xx, + .set_pull = s3c_gpio_setpull_updown, + .get_pull = s3c_gpio_getpull_updown, +}; + +int s3c64xx_gpio2int_gpn(struct gpio_chip *chip, unsigned pin) +{ + return IRQ_EINT(0) + pin; +} + +static struct s3c_gpio_chip gpio_2bit[] = { + { + .base = S3C64XX_GPF_BASE, + .config = &gpio_2bit_cfg_eint11, + .chip = { + .base = S3C64XX_GPF(0), + .ngpio = S3C64XX_GPIO_F_NR, + .label = "GPF", + }, + }, { + .base = S3C64XX_GPI_BASE, + .config = &gpio_2bit_cfg_noint, + .chip = { + .base = S3C64XX_GPI(0), + .ngpio = S3C64XX_GPIO_I_NR, + .label = "GPI", + }, + }, { + .base = S3C64XX_GPJ_BASE, + .config = &gpio_2bit_cfg_noint, + .chip = { + .base = S3C64XX_GPJ(0), + .ngpio = S3C64XX_GPIO_J_NR, + .label = "GPJ", + }, + }, { + .base = S3C64XX_GPN_BASE, + .config = &gpio_2bit_cfg_eint10, + .chip = { + .base = S3C64XX_GPN(0), + .ngpio = S3C64XX_GPIO_N_NR, + .label = "GPN", + .to_irq = s3c64xx_gpio2int_gpn, + }, + }, { + .base = S3C64XX_GPO_BASE, + .config = &gpio_2bit_cfg_eint11, + .chip = { + .base = S3C64XX_GPO(0), + .ngpio = S3C64XX_GPIO_O_NR, + .label = "GPO", + }, + }, { + .base = S3C64XX_GPP_BASE, + .config = &gpio_2bit_cfg_eint11, + .chip = { + .base = S3C64XX_GPP(0), + .ngpio = S3C64XX_GPIO_P_NR, + .label = "GPP", + }, + }, { + .base = S3C64XX_GPQ_BASE, + .config = &gpio_2bit_cfg_eint11, + .chip = { + .base = S3C64XX_GPQ(0), + .ngpio = S3C64XX_GPIO_Q_NR, + .label = "GPQ", + }, + }, +}; + +static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip) +{ + chip->pm = __gpio_pm(&s3c_gpio_pm_2bit); +} + +static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips, + int nr_chips, + void (*fn)(struct s3c_gpio_chip *)) +{ + for (; nr_chips > 0; nr_chips--, chips++) { + if (fn) + (fn)(chips); + s3c_gpiolib_add(chips); + } +} + +static __init int s3c64xx_gpiolib_init(void) +{ + s3c64xx_gpiolib_add(gpio_4bit, ARRAY_SIZE(gpio_4bit), + samsung_gpiolib_add_4bit); + + s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2), + samsung_gpiolib_add_4bit2); + + s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit), + s3c64xx_gpiolib_add_2bit); + + return 0; +} + +core_initcall(s3c64xx_gpiolib_init); |