[U-Boot] [PATCH 1/2] Add GPIO Driver and IOMUX definition for S3C2440
Marek Vasut
marex at denx.de
Mon Apr 30 01:29:37 CEST 2012
Dear Gabriel Huau,
Commit message got lost ? :p
> Signed-off-by: Gabriel Huau <contact at huau-gabriel.fr>
> ---
> arch/arm/include/asm/arch-s3c24x0/gpio.h | 183
> +++++++++++++++++++++++++++ arch/arm/include/asm/arch-s3c24x0/iomux.h |
> 197 +++++++++++++++++++++++++++++ drivers/gpio/Makefile
> | 1 +
> drivers/gpio/s3c2440_gpio.c | 74 +++++++++++
> 4 files changed, 455 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..e7fbefe
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-s3c24x0/gpio.h
> @@ -0,0 +1,183 @@
> +/*
> + * Copyright (c) 2012, Gabriel Huau. All rights reserved.
> + * 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_
> +
> +#define GPIO_INPUT 0x0
> +#define GPIO_OUTPUT 0x1
> +
> +/* 0x4 means that we can DAT and not CON register */
> +#define GPIO_PORT(x) ((((x) >> 5) & 0x3) + 0x4)
> +#define GPIO_BIT(x) ((x) & 0x3f)
Move this to driver?
> +
> +/*
> + * 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)) +
> +typedef 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,
> +} s3c2240_gpio;
> +
> +#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..2201cd3
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-s3c24x0/iomux.h
> @@ -0,0 +1,197 @@
> +/*
> + * Copyright (c) 2012, Gabriel Huau. All rights reserved.
Add your email address so I know where to send blackmail if this gets broken ;-)
> + * 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_
> +
> +typedef enum s3c2440_iomux_func {
No typedefs please.
> + /* 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),
The formatting here is shitty, use tabs ;-)
> + 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
> +} s3c2440_gpio_func;
> +
> +#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..adfa812
> --- /dev/null
> +++ b/drivers/gpio/s3c2440_gpio.c
> @@ -0,0 +1,74 @@
> +/*
> + * 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>
> +
> +int gpio_set_value(unsigned gpio, int value)
> +{
> + unsigned l = readl(GPIO_FULLPORT(gpio));
> + unsigned port = GPIO_FULLPORT(gpio);
> +
> + if(value)
> + if(!GPIO_PORT(gpio))
> + l |= (0x1 << GPIO_BIT(gpio));
> + else
> + l |= (0x3 << GPIO_BIT(gpio));
> + else
> + if(!GPIO_PORT(gpio))
> + l &= ~(0x1 << GPIO_BIT(gpio));
> + else
> + l &= ~(0x3 << GPIO_BIT(gpio));
Documentation/comment won't hurt.
> + 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);
> +}
This wasn't that bad ;-)
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