ARM : Add GPIO Driver and IOMUX definition for S3C2440

It's now possible to use the gpio driver interface
for s3c2440. This patch add iomux definitions too.

Signed-off-by: Gabriel Huau <contact@huau-gabriel.fr>

arch/arm/include/asm/arch-s3c24x0/gpio.h

+/*
+ * Copyright (c) 2012.
+ *
+ * Gabriel Huau <contact@huau-gabriel.fr>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _S3C24X0_GPIO_H_
+#define _S3C24X0_GPIO_H_
+
+enum s3c2440_gpio {
+	GPA0,
+	GPA1,
+	GPA2,
+	GPA3,
+	GPA4,
+	GPA5,
+	GPA6,
+	GPA7,
+	GPA8,
+	GPA9,
+	GPA10,
+	GPA11,
+	GPA12,
+	GPA13,
+	GPA14,
+	GPA15,
+	GPA16,
+	GPA17,
+	GPA18,
+	GPA19,
+	GPA20,
+	GPA21,
+	GPA22,
+	GPA23,
+	GPA24,
+
+	GPB0 = 32,
+	GPB1,
+	GPB2,
+	GPB3,
+	GPB4,
+	GPB5,
+	GPB6,
+	GPB7,
+	GPB8,
+	GPB9,
+	GPB10,
+
+	GPC0 = 64,
+	GPC1,
+	GPC2,
+	GPC3,
+	GPC4,
+	GPC5,
+	GPC6,
+	GPC7,
+	GPC8,
+	GPC9,
+	GPC10,
+	GPC11,
+	GPC12,
+	GPC13,
+	GPC14,
+	GPC15,
+
+	GPD0 = 96,
+	GPD1,
+	GPD2,
+	GPD3,
+	GPD4,
+	GPD5,
+	GPD6,
+	GPD7,
+	GPD8,
+	GPD9,
+	GPD10,
+	GPD11,
+	GPD12,
+	GPD13,
+	GPD14,
+	GPD15,
+
+	GPE0 = 128,
+	GPE1,
+	GPE2,
+	GPE3,
+	GPE4,
+	GPE5,
+	GPE6,
+	GPE7,
+	GPE8,
+	GPE9,
+	GPE10,
+	GPE11,
+	GPE12,
+	GPE13,
+	GPE14,
+	GPE15,
+
+	GPF0 = 160,
+	GPF1,
+	GPF2,
+	GPF3,
+	GPF4,
+	GPF5,
+	GPF6,
+	GPF7,
+
+	GPG0 = 192,
+	GPG1,
+	GPG2,
+	GPG3,
+	GPG4,
+	GPG5,
+	GPG6,
+	GPG7,
+	GPG8,
+	GPG9,
+	GPG10,
+	GPG11,
+	GPG12,
+	GPG13,
+	GPG14,
+	GPG15,
+
+	GPH0 = 224,
+	GPH1,
+	GPH2,
+	GPH3,
+	GPH4,
+	GPH5,
+	GPH6,
+	GPH7,
+	GPH8,
+	GPH9,
+	GPH10,
+
+	GPJ0 = 256,
+	GPJ1,
+	GPJ2,
+	GPJ3,
+	GPJ4,
+	GPJ5,
+	GPJ6,
+	GPJ7,
+	GPJ8,
+	GPJ9,
+	GPJ10,
+	GPJ11,
+	GPJ12,
+};
+
+#endif

arch/arm/include/asm/arch-s3c24x0/iomux.h

+/*
+ * Copyright (c) 2012
+ *
+ * Gabriel Huau <contact@huau-gabriel.fr>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _S3C24X0_IOMUX_H_
+#define _S3C24X0_IOMUX_H_
+
+enum s3c2440_iomux_func {
+	/* PORT A */
+	IOMUXA_ADDR0	= 1,
+	IOMUXA_ADDR16	= (1 << 1),
+	IOMUXA_ADDR17	= (1 << 2),
+	IOMUXA_ADDR18	= (1 << 3),
+	IOMUXA_ADDR19	= (1 << 4),
+	IOMUXA_ADDR20	= (1 << 5),
+	IOMUXA_ADDR21	= (1 << 6),
+	IOMUXA_ADDR22	= (1 << 7),
+	IOMUXA_ADDR23	= (1 << 8),
+	IOMUXA_ADDR24	= (1 << 9),
+	IOMUXA_ADDR25	= (1 << 10),
+	IOMUXA_ADDR26	= (1 << 11),
+	IOMUXA_nGCS1	= (1 << 12),
+	IOMUXA_nGCS2	= (1 << 13),
+	IOMUXA_nGCS3	= (1 << 14),
+	IOMUXA_nGCS4	= (1 << 15),
+	IOMUXA_nGCS5	= (1 << 16),
+	IOMUXA_CLE	= (1 << 17),
+	IOMUXA_ALE	= (1 << 18),
+	IOMUXA_nFWE	= (1 << 19),
+	IOMUXA_nFRE	= (1 << 20),
+	IOMUXA_nRSTOUT	= (1 << 21),
+	IOMUXA_nFCE		= (1 << 22),
+
+	/* PORT B */
+	IOMUXB_nXDREQ0	= (2 << 20),
+	IOMUXB_nXDACK0	= (2 << 18),
+	IOMUXB_nXDREQ1	= (2 << 16),
+	IOMUXB_nXDACK1	= (2 << 14),
+	IOMUXB_nXBREQ	= (2 << 12),
+	IOMUXB_nXBACK	= (2 << 10),
+	IOMUXB_TCLK0	= (2 << 8),
+	IOMUXB_TOUT3	= (2 << 6),
+	IOMUXB_TOUT2	= (2 << 4),
+	IOMUXB_TOUT1	= (2 << 2),
+	IOMUXB_TOUT0	= 2,
+
+	/* PORT C */
+	IOMUXC_VS7	= (2 << 30),
+	IOMUXC_VS6	= (2 << 28),
+	IOMUXC_VS5	= (2 << 26),
+	IOMUXC_VS4	= (2 << 24),
+	IOMUXC_VS3	= (2 << 22),
+	IOMUXC_VS2	= (2 << 20),
+	IOMUXC_VS1	= (2 << 18),
+	IOMUXC_VS0	= (2 << 16),
+	IOMUXC_LCD_LPCREVB	= (2 << 14),
+	IOMUXC_LCD_LPCREV	= (2 << 12),
+	IOMUXC_LCD_LPCOE	= (2 << 10),
+	IOMUXC_VM		= (2 << 8),
+	IOMUXC_VFRAME	= (2 << 6),
+	IOMUXC_VLINE	= (2 << 4),
+	IOMUXC_VCLK		= (2 << 2),
+	IOMUXC_LEND		= 2,
+	IOMUXC_I2SSDI	= (3 << 8),
+
+	/* PORT D */
+	IOMUXD_VS23	= (2 << 30),
+	IOMUXD_VS22	= (2 << 28),
+	IOMUXD_VS21	= (2 << 26),
+	IOMUXD_VS20	= (2 << 24),
+	IOMUXD_VS19	= (2 << 22),
+	IOMUXD_VS18	= (2 << 20),
+	IOMUXD_VS17	= (2 << 18),
+	IOMUXD_VS16	= (2 << 16),
+	IOMUXD_VS15	= (2 << 14),
+	IOMUXD_VS14	= (2 << 12),
+	IOMUXD_VS13	= (2 << 10),
+	IOMUXD_VS12	= (2 << 8),
+	IOMUXD_VS11	= (2 << 6),
+	IOMUXD_VS10	= (2 << 4),
+	IOMUXD_VS9	= (2 << 2),
+	IOMUXD_VS8	= 2,
+	IOMUXD_nSS0	= (3 << 30),
+	IOMUXD_nSS1	= (3 << 28),
+	IOMUXD_SPICLK1	= (3 << 20),
+	IOMUXD_SPIMOSI1	= (3 << 18),
+	IOMUXD_SPIMISO1	= (3 << 16),
+
+	/* PORT E */
+	IOMUXE_IICSDA	= (2 << 30),
+	IOMUXE_IICSCL	= (2 << 28),
+	IOMUXE_SPICLK0	= (2 << 26),
+	IOMUXE_SPIMOSI0	= (2 << 24),
+	IOMUXE_SPIMISO0	= (2 << 22),
+	IOMUXE_SDDAT3	= (2 << 20),
+	IOMUXE_SDDAT2	= (2 << 18),
+	IOMUXE_SDDAT1	= (2 << 16),
+	IOMUXE_SDDAT0	= (2 << 14),
+	IOMUXE_SDCMD	= (2 << 12),
+	IOMUXE_SDCLK	= (2 << 10),
+	IOMUXE_I2SDO	= (2 << 8),
+	IOMUXE_I2SDI	= (2 << 6),
+	IOMUXE_CDCLK	= (2 << 4),
+	IOMUXE_I2SSCLK	= (2 << 2),
+	IOMUXE_I2SLRCK	= 2,
+	IOMUXE_AC_SDATA_OUT	= (3 << 8),
+	IOMUXE_AC_SDATA_IN	= (3 << 6),
+	IOMUXE_AC_nRESET	= (3 << 4),
+	IOMUXE_AC_BIT_CLK	= (3 << 2),
+	IOMUXE_AC_SYNC		= 3,
+
+	/* PORT F */
+	IOMUXF_EINT7	= (2 << 14),
+	IOMUXF_EINT6	= (2 << 12),
+	IOMUXF_EINT5	= (2 << 10),
+	IOMUXF_EINT4	= (2 << 8),
+	IOMUXF_EINT3	= (2 << 6),
+	IOMUXF_EINT2	= (2 << 4),
+	IOMUXF_EINT1	= (2 << 2),
+	IOMUXF_EINT0	= 2,
+
+	/* PORT G */
+	IOMUXG_EINT23	= (2 << 30),
+	IOMUXG_EINT22	= (2 << 28),
+	IOMUXG_EINT21	= (2 << 26),
+	IOMUXG_EINT20	= (2 << 24),
+	IOMUXG_EINT19	= (2 << 22),
+	IOMUXG_EINT18	= (2 << 20),
+	IOMUXG_EINT17	= (2 << 18),
+	IOMUXG_EINT16	= (2 << 16),
+	IOMUXG_EINT15	= (2 << 14),
+	IOMUXG_EINT14	= (2 << 12),
+	IOMUXG_EINT13	= (2 << 10),
+	IOMUXG_EINT12	= (2 << 8),
+	IOMUXG_EINT11	= (2 << 6),
+	IOMUXG_EINT10	= (2 << 4),
+	IOMUXG_EINT9	= (2 << 2),
+	IOMUXG_EINT8	= 2,
+	IOMUXG_TCLK1	= (3 << 22),
+	IOMUXG_nCTS1	= (3 << 20),
+	IOMUXG_nRTS1	= (3 << 18),
+	IOMUXG_SPICLK1	= (3 << 14),
+	IOMUXG_SPIMOSI1	= (3 << 12),
+	IOMUXG_SPIMISO1	= (3 << 10),
+	IOMUXG_LCD_PWRDN	= (3 << 8),
+	IOMUXG_nSS1			= (3 << 6),
+	IOMUXG_nSS0			= (3 << 4),
+
+	/* PORT H */
+	IOMUXH_CLKOUT1	= (2 << 20),
+	IOMUXH_CLKOUT0	= (2 << 18),
+	IOMUXH_UEXTCLK	= (2 << 16),
+	IOMUXH_RXD2		= (2 << 14),
+	IOMUXH_TXD2		= (2 << 12),
+	IOMUXH_RXD1		= (2 << 10),
+	IOMUXH_TXD1		= (2 << 8),
+	IOMUXH_RXD0		= (2 << 6),
+	IOMUXH_TXD0		= (2 << 4),
+	IOMUXH_nRTS0	= (2 << 2),
+	IOMUXH_nCTS0	= 2,
+	IOMUXH_nCTS1	= (3 << 14),
+	IOMUXH_nRTS1	= (3 << 12),
+
+	/* PORT J */
+	IOMUXJ_CAMRESET		= (2 << 24),
+	IOMUXJ_CAMCLKOUT	= (2 << 22),
+	IOMUXJ_CAMHREF		= (2 << 20),
+	IOMUXJ_CAMVSYNC		= (2 << 18),
+	IOMUXJ_CAMPCLK		= (2 << 16),
+	IOMUXJ_CAMDATA7		= (2 << 14),
+	IOMUXJ_CAMDATA6		= (2 << 12),
+	IOMUXJ_CAMDATA5		= (2 << 10),
+	IOMUXJ_CAMDATA4		= (2 << 8),
+	IOMUXJ_CAMDATA3		= (2 << 6),
+	IOMUXJ_CAMDATA2		= (2 << 4),
+	IOMUXJ_CAMDATA1		= (2 << 2),
+	IOMUXJ_CAMDATA0		= 2
+};
+
+#endif

drivers/gpio/Makefile

@@ -44,6 +44,7 @@ COBJS-$(CONFIG_SH_GPIO_PFC)	+= sh_pfc.o
 COBJS-$(CONFIG_OMAP_GPIO)	+= omap_gpio.o
 COBJS-$(CONFIG_DB8500_GPIO)	+= db8500_gpio.o
 COBJS-$(CONFIG_BCM2835_GPIO)	+= bcm2835_gpio.o
+COBJS-$(CONFIG_S3C2440_GPIO)	+= s3c2440_gpio.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)

drivers/gpio/s3c2440_gpio.c

+/*
+ * Copyright (C) 2012
+ * Gabriel Huau <contact@huau-gabriel.fr>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+#include <asm/arch/s3c2440.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+
+#define GPIO_INPUT  0x0
+#define GPIO_OUTPUT 0x1
+
+/* 0x4 means that we want DAT and not CON register */
+#define GPIO_PORT(x)	((((x) >> 5) & 0x3) + 0x4)
+#define GPIO_BIT(x)		((x) & 0x3f)
+
+/*
+ * It's how we calculate the full port address
+ * We have to get the number of the port + 1 (Port A is at 0x56000001 ...)
+ * We move it at the second digit, and finally we add 0x4 because we want
+ * to modify GPIO DAT and not CON
+ */
+#define GPIO_FULLPORT(x) (S3C24X0_GPIO_BASE | ((GPIO_PORT(gpio) + 1) << 1))
+
+int gpio_set_value(unsigned gpio, int value)
+{
+	unsigned l = readl(GPIO_FULLPORT(gpio));
+	unsigned bit;
+	unsigned port = GPIO_FULLPORT(gpio);
+
+	/*
+	 * All GPIO Port have a configuration on
+	 * 2 bits excepted the first GPIO (A) which
+	 * have only 1 bit of configuration.
+	 */
+	if (!GPIO_PORT(gpio))
+		bit = (0x1 << GPIO_BIT(gpio));
+	else
+		bit = (0x3 << GPIO_BIT(gpio));
+
+	if (value)
+		l |= bit;
+	else
+		l &= ~bit;
+
+	return writel(port, l);
+}
+
+int gpio_get_value(unsigned gpio)
+{
+	unsigned l = readl(GPIO_FULLPORT(gpio));
+
+	if (GPIO_PORT(gpio) == 0) /* PORT A */
+		return (l >> GPIO_BIT(gpio)) & 0x1;
+	return (l >> GPIO_BIT(gpio)) & 0x3;
+}
+
+int gpio_request(unsigned gpio, const char *label)
+{
+	return 0;
+}
+
+int gpio_free(unsigned gpio)
+{
+	return 0;
+}
+
+int gpio_direction_input(unsigned gpio)
+{
+	return writel(GPIO_FULLPORT(gpio), GPIO_INPUT << GPIO_BIT(gpio));
+}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+	writel(GPIO_FULLPORT(gpio), GPIO_OUTPUT << GPIO_BIT(gpio));
+	return gpio_set_value(gpio, value);
+}