[U-Boot] [PATCH 1/2 v5] ARM : Add GPIO Driver and IOMUX definition for S3C2440
Gabriel Huau
contact at huau-gabriel.fr
Wed May 2 22:49:55 CEST 2012
It's now possible to use the gpio driver interface
for s3c2440. This patch add iomux definitions too.
Signed-off-by: Gabriel Huau <contact at huau-gabriel.fr>
---
Changes for v2:
- Modification of the coding style
- Add my email address to copyright
- Remove a typedef
- Move some defines to driver file
Changes for v3:
- Cleanup coding style
- Changement of the commit message
Changes for v4:
- Add a nice commit message
Changes for v5:
- Coding style modification about if-else braces
arch/arm/include/asm/arch-s3c24x0/gpio.h | 171 ++++++++++++++++++++++++
arch/arm/include/asm/arch-s3c24x0/iomux.h | 200 +++++++++++++++++++++++++++++
drivers/gpio/Makefile | 1 +
drivers/gpio/s3c2440_gpio.c | 95 ++++++++++++++
4 files changed, 467 insertions(+)
create mode 100644 arch/arm/include/asm/arch-s3c24x0/gpio.h
create mode 100644 arch/arm/include/asm/arch-s3c24x0/iomux.h
create mode 100644 drivers/gpio/s3c2440_gpio.c
diff --git a/arch/arm/include/asm/arch-s3c24x0/gpio.h b/arch/arm/include/asm/arch-s3c24x0/gpio.h
new file mode 100644
index 0000000..76bc52c
--- /dev/null
+++ b/arch/arm/include/asm/arch-s3c24x0/gpio.h
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2012.
+ *
+ * Gabriel Huau <contact at 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
diff --git a/arch/arm/include/asm/arch-s3c24x0/iomux.h b/arch/arm/include/asm/arch-s3c24x0/iomux.h
new file mode 100644
index 0000000..cc22de7
--- /dev/null
+++ b/arch/arm/include/asm/arch-s3c24x0/iomux.h
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2012
+ *
+ * Gabriel Huau <contact at 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
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index fb3b09a..7ae6f84 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -39,6 +39,7 @@ COBJS-$(CONFIG_TEGRA2_GPIO) += tegra2_gpio.o
COBJS-$(CONFIG_DA8XX_GPIO) += da8xx_gpio.o
COBJS-$(CONFIG_ALTERA_PIO) += altera_pio.o
COBJS-$(CONFIG_MPC83XX_GPIO) += mpc83xx_gpio.o
+COBJS-$(CONFIG_S3C2440_GPIO) += s3c2440_gpio.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/gpio/s3c2440_gpio.c b/drivers/gpio/s3c2440_gpio.c
new file mode 100644
index 0000000..43bbf11
--- /dev/null
+++ b/drivers/gpio/s3c2440_gpio.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2012
+ * Gabriel Huau <contact at 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);
+}
--
1.7.9.5
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