/* linux/arch/arm/mach-s5p64x0/gpio.c * * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. * http://www.samsung.com * * S5P64X0 - 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 <linux/gpio.h> #include <mach/map.h> #include <mach/regs-gpio.h> #include <plat/gpio-core.h> #include <plat/gpio-cfg.h> #include <plat/gpio-cfg-helpers.h> /* To be implemented S5P6450 GPIO */ /* * S5P6440 GPIO bank summary: * * Bank GPIOs Style SlpCon ExtInt Group * A 6 4Bit Yes 1 * B 7 4Bit Yes 1 * C 8 4Bit Yes 2 * F 2 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 * N 16 2Bit No IRQ_EINT * P 8 2Bit Yes 8 * R 15 4Bit[2] Yes 8 * * [1] BANKF pins 14,15 do not form part of the external interrupt sources * [2] BANK has two control registers, GPxCON0 and GPxCON1 */ static int s5p64x0_gpiolib_rbank_4bit2_input(struct gpio_chip *chip, unsigned int offset) { struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip); void __iomem *base = ourchip->base; void __iomem *regcon = base; unsigned long con; unsigned long flags; switch (offset) { case 6: offset += 1; case 0: case 1: case 2: case 3: case 4: case 5: regcon -= 4; break; default: offset -= 7; break; } s3c_gpio_lock(ourchip, flags); con = __raw_readl(regcon); con &= ~(0xf << con_4bit_shift(offset)); __raw_writel(con, regcon); s3c_gpio_unlock(ourchip, flags); return 0; } static int s5p64x0_gpiolib_rbank_4bit2_output(struct gpio_chip *chip, unsigned int offset, int value) { struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip); void __iomem *base = ourchip->base; void __iomem *regcon = base; unsigned long con; unsigned long dat; unsigned long flags; unsigned con_offset = offset; switch (con_offset) { case 6: con_offset += 1; case 0: case 1: case 2: case 3: case 4: case 5: regcon -= 4; break; default: con_offset -= 7; break; } s3c_gpio_lock(ourchip, flags); con = __raw_readl(regcon); con &= ~(0xf << con_4bit_shift(con_offset)); con |= 0x1 << con_4bit_shift(con_offset); dat = __raw_readl(base + GPIODAT_OFF); if (value) dat |= 1 << offset; else dat &= ~(1 << offset); __raw_writel(con, regcon); __raw_writel(dat, base + GPIODAT_OFF); s3c_gpio_unlock(ourchip, flags); return 0; } int s5p64x0_gpio_setcfg_4bit_rbank(struct s3c_gpio_chip *chip, unsigned int off, unsigned int cfg) { void __iomem *reg = chip->base; unsigned int shift; u32 con; switch (off) { case 0: case 1: case 2: case 3: case 4: case 5: shift = (off & 7) * 4; reg -= 4; break; case 6: shift = ((off + 1) & 7) * 4; reg -= 4; default: shift = ((off + 1) & 7) * 4; break; } if (s3c_gpio_is_cfg_special(cfg)) { cfg &= 0xf; cfg <<= shift; } con = __raw_readl(reg); con &= ~(0xf << shift); con |= cfg; __raw_writel(con, reg); return 0; } static struct s3c_gpio_cfg s5p64x0_gpio_cfgs[] = { { .cfg_eint = 0, }, { .cfg_eint = 7, }, { .cfg_eint = 3, .set_config = s5p64x0_gpio_setcfg_4bit_rbank, }, { .cfg_eint = 0, .set_config = s3c_gpio_setcfg_s3c24xx, .get_config = s3c_gpio_getcfg_s3c24xx, }, { .cfg_eint = 2, .set_config = s3c_gpio_setcfg_s3c24xx, .get_config = s3c_gpio_getcfg_s3c24xx, }, { .cfg_eint = 3, .set_config = s3c_gpio_setcfg_s3c24xx, .get_config = s3c_gpio_getcfg_s3c24xx, }, }; static struct s3c_gpio_chip s5p6440_gpio_4bit[] = { { .base = S5P6440_GPA_BASE, .config = &s5p64x0_gpio_cfgs[1], .chip = { .base = S5P6440_GPA(0), .ngpio = S5P6440_GPIO_A_NR, .label = "GPA", }, }, { .base = S5P6440_GPB_BASE, .config = &s5p64x0_gpio_cfgs[1], .chip = { .base = S5P6440_GPB(0), .ngpio = S5P6440_GPIO_B_NR, .label = "GPB", }, }, { .base = S5P6440_GPC_BASE, .config = &s5p64x0_gpio_cfgs[1], .chip = { .base = S5P6440_GPC(0), .ngpio = S5P6440_GPIO_C_NR, .label = "GPC", }, }, { .base = S5P6440_GPG_BASE, .config = &s5p64x0_gpio_cfgs[1], .chip = { .base = S5P6440_GPG(0), .ngpio = S5P6440_GPIO_G_NR, .label = "GPG", }, }, }; static struct s3c_gpio_chip s5p6440_gpio_4bit2[] = { { .base = S5P6440_GPH_BASE + 0x4, .config = &s5p64x0_gpio_cfgs[1], .chip = { .base = S5P6440_GPH(0), .ngpio = S5P6440_GPIO_H_NR, .label = "GPH", }, }, }; static struct s3c_gpio_chip s5p6440_gpio_rbank_4bit2[] = { { .base = S5P6440_GPR_BASE + 0x4, .config = &s5p64x0_gpio_cfgs[2], .chip = { .base = S5P6440_GPR(0), .ngpio = S5P6440_GPIO_R_NR, .label = "GPR", }, }, }; static struct s3c_gpio_chip s5p6440_gpio_2bit[] = { { .base = S5P6440_GPF_BASE, .config = &s5p64x0_gpio_cfgs[5], .chip = { .base = S5P6440_GPF(0), .ngpio = S5P6440_GPIO_F_NR, .label = "GPF", }, }, { .base = S5P6440_GPI_BASE, .config = &s5p64x0_gpio_cfgs[3], .chip = { .base = S5P6440_GPI(0), .ngpio = S5P6440_GPIO_I_NR, .label = "GPI", }, }, { .base = S5P6440_GPJ_BASE, .config = &s5p64x0_gpio_cfgs[3], .chip = { .base = S5P6440_GPJ(0), .ngpio = S5P6440_GPIO_J_NR, .label = "GPJ", }, }, { .base = S5P6440_GPN_BASE, .config = &s5p64x0_gpio_cfgs[4], .chip = { .base = S5P6440_GPN(0), .ngpio = S5P6440_GPIO_N_NR, .label = "GPN", }, }, { .base = S5P6440_GPP_BASE, .config = &s5p64x0_gpio_cfgs[5], .chip = { .base = S5P6440_GPP(0), .ngpio = S5P6440_GPIO_P_NR, .label = "GPP", }, }, }; void __init s5p64x0_gpiolib_set_cfg(struct s3c_gpio_cfg *chipcfg, int nr_chips) { for (; nr_chips > 0; nr_chips--, chipcfg++) { if (!chipcfg->set_config) chipcfg->set_config = s3c_gpio_setcfg_s3c64xx_4bit; if (!chipcfg->get_config) chipcfg->get_config = s3c_gpio_getcfg_s3c64xx_4bit; if (!chipcfg->set_pull) chipcfg->set_pull = s3c_gpio_setpull_updown; if (!chipcfg->get_pull) chipcfg->get_pull = s3c_gpio_getpull_updown; } } static void __init s5p64x0_gpio_add_rbank_4bit2(struct s3c_gpio_chip *chip, int nr_chips) { for (; nr_chips > 0; nr_chips--, chip++) { chip->chip.direction_input = s5p64x0_gpiolib_rbank_4bit2_input; chip->chip.direction_output = s5p64x0_gpiolib_rbank_4bit2_output; s3c_gpiolib_add(chip); } } static int __init s5p6440_gpiolib_init(void) { struct s3c_gpio_chip *chips = s5p6440_gpio_2bit; int nr_chips = ARRAY_SIZE(s5p6440_gpio_2bit); s5p64x0_gpiolib_set_cfg(s5p64x0_gpio_cfgs, ARRAY_SIZE(s5p64x0_gpio_cfgs)); for (; nr_chips > 0; nr_chips--, chips++) s3c_gpiolib_add(chips); samsung_gpiolib_add_4bit_chips(s5p6440_gpio_4bit, ARRAY_SIZE(s5p6440_gpio_4bit)); samsung_gpiolib_add_4bit2_chips(s5p6440_gpio_4bit2, ARRAY_SIZE(s5p6440_gpio_4bit2)); s5p64x0_gpio_add_rbank_4bit2(s5p6440_gpio_rbank_4bit2, ARRAY_SIZE(s5p6440_gpio_rbank_4bit2)); return 0; } arch_initcall(s5p6440_gpiolib_init);