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Diffstat (limited to 'arch/arm/mach-s3c64xx/gpiolib.c')
-rw-r--r--arch/arm/mach-s3c64xx/gpiolib.c288
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 00000000000..66e6794481d
--- /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);