Re: [U-Boot] [PATCH 1/2 V4] EXYNOS5: PINMUX: Added default pinumx settings

Hi,

On Fri, Jun 1, 2012 at 5:18 AM, Rajeshwari Shinde rajeshwari.s@samsung.comwrote:

This patch performs the pinmux configuration in a common file. As of now only EXYNOS5 pinmux for SDMMC, UART and Ethernet is supported.

Signed-off-by: Abhilash Kesavan a.kesavan@samsung.com Signed-off-by: Che-Liang Chiou clchiou@chromium.org Signed-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com Acked-by: Chander Kashyap chander.kashyap@linaro.org

---

Changes in V2: - Adding pinmux.c to Makefile moved to this patch. - exynos5_pinmux_config made static Changes in V3: - Separate functions made for each peripheral - enum periph_id moved to a separate periph.h Changes in V4: - removed variable declarations from exynos5_pinmux_config arch/arm/cpu/armv7/exynos/Makefile | 2 +- arch/arm/cpu/armv7/exynos/pinmux.c | 219 +++++++++++++++++++++++++++++ arch/arm/include/asm/arch-exynos/periph.h | 47 ++++++ arch/arm/include/asm/arch-exynos/pinmux.h | 58 ++++++++ 4 files changed, 325 insertions(+), 1 deletions(-) create mode 100644 arch/arm/cpu/armv7/exynos/pinmux.c create mode 100644 arch/arm/include/asm/arch-exynos/periph.h create mode 100644 arch/arm/include/asm/arch-exynos/pinmux.h

diff --git a/arch/arm/cpu/armv7/exynos/Makefile b/arch/arm/cpu/armv7/exynos/Makefile index 90ec2bd..9119961 100644 --- a/arch/arm/cpu/armv7/exynos/Makefile +++ b/arch/arm/cpu/armv7/exynos/Makefile @@ -22,7 +22,7 @@ include $(TOPDIR)/config.mk

LIB = $(obj)lib$(SOC).o

-COBJS += clock.o power.o soc.o system.o +COBJS += clock.o power.o soc.o system.o pinmux.o

SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS)) diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c new file mode 100644 index 0000000..597e487 --- /dev/null +++ b/arch/arm/cpu/armv7/exynos/pinmux.c @@ -0,0 +1,219 @@ +/*

• • Copyright (c) 2012 Samsung Electronics.
• • Abhilash Kesavan a.kesavan@samsung.com
• • 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/gpio.h> +#include <asm/arch/pinmux.h> +#include <asm/arch/sromc.h>

+static void exynos5_uart_config(int peripheral) +{

•   struct exynos5_gpio_part1 *gpio1 =
  

•           (struct exynos5_gpio_part1 *)
  

samsung_get_base_gpio_part1();

•   struct s5p_gpio_bank *bank;
  

•   int i, start, count;
  

•   switch (peripheral) {
  

•   case PERIPH_ID_UART0:
  

•           bank = &gpio1->a0;
  

•           start = 0;
  

•           count = 4;
  

•           break;
  

•   case PERIPH_ID_UART1:
  

•           bank = &gpio1->a0;
  

•           start = 4;
  

•           count = 4;
  

•           break;
  

•   case PERIPH_ID_UART2:
  

•           bank = &gpio1->a1;
  

•           start = 0;
  

•           count = 4;
  

•           break;
  

•   case PERIPH_ID_UART3:
  

•           bank = &gpio1->a1;
  

•           start = 4;
  

•           count = 2;
  

•           break;
  

•   }
  

•   for (i = start; i < start + count; i++) {
  

•           s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
  

•           s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
  

•   }
  

+}

+static void exynos5_mmc_config(int peripheral, int flags) +{

•   struct exynos5_gpio_part1 *gpio1 =
  

•           (struct exynos5_gpio_part1 *)
  

samsung_get_base_gpio_part1();

•   struct s5p_gpio_bank *bank, *bank_ext;
  

•   int i;
  

•   switch (peripheral) {
  

•   case PERIPH_ID_SDMMC0:
  

•           bank = &gpio1->c0;
  

•           bank_ext = &gpio1->c1;
  

•           break;
  

•   case PERIPH_ID_SDMMC1:
  

•           bank = &gpio1->c1;
  

•           bank_ext = NULL;
  

•           break;
  

•   case PERIPH_ID_SDMMC2:
  

•           bank = &gpio1->c2;
  

•           bank_ext = &gpio1->c3;
  

•           break;
  

•   case PERIPH_ID_SDMMC3:
  

•           bank = &gpio1->c3;
  

•           bank_ext = NULL;
  

•           break;
  

•   }
  

•   if ((flags & PINMUX_FLAG_8BIT_MODE) && !bank_ext) {
  

•           debug("SDMMC device %d does not support 8bit mode",
  

•                           peripheral);
  

•           return -1;
  
  

Then this function will need to return a value.

•   }
  

•   if (flags & PINMUX_FLAG_8BIT_MODE) {
  

•           for (i = 3; i <= 6; i++) {
  

•                   s5p_gpio_cfg_pin(bank_ext, i, GPIO_FUNC(0x3));
  

•                   s5p_gpio_set_pull(bank_ext, i, GPIO_PULL_UP);
  

•                   s5p_gpio_set_drv(bank_ext, i, GPIO_DRV_4X);
  

•           }
  

•   }
  

•   for (i = 0; i < 2; i++) {
  

•           s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
  

•           s5p_gpio_set_pull(bank, i, GPIO_PULL_NONE);
  

•           s5p_gpio_set_drv(bank, i, GPIO_DRV_4X);
  

•   }
  

•   for (i = 3; i <= 6; i++) {
  

•           s5p_gpio_cfg_pin(bank, i, GPIO_FUNC(0x2));
  

•           s5p_gpio_set_pull(bank, i, GPIO_PULL_UP);
  

•           s5p_gpio_set_drv(bank, i, GPIO_DRV_4X);
  

•   }
  

+}

+static void exynos5_sromc_config(int flags) +{

•   struct exynos5_gpio_part1 *gpio1 =
  

•           (struct exynos5_gpio_part1 *)
  

samsung_get_base_gpio_part1();

•   int i;
  

•   /*
  

•    * SROM:CS1 and EBI
  

•    *
  

•    * GPY0[0]      SROM_CSn[0]
  

•    * GPY0[1]      SROM_CSn[1](2)
  

•    * GPY0[2]      SROM_CSn[2]
  

•    * GPY0[3]      SROM_CSn[3]
  

•    * GPY0[4]      EBI_OEn(2)
  

•    * GPY0[5]      EBI_EEn(2)
  

•    *
  

•    * GPY1[0]      EBI_BEn[0](2)
  

•    * GPY1[1]      EBI_BEn[1](2)
  

•    * GPY1[2]      SROM_WAIT(2)
  

•    * GPY1[3]      EBI_DATA_RDn(2)
  

•    */
  

•   s5p_gpio_cfg_pin(&gpio1->y0, (flags & PINMUX_FLAG_BANK),
  

•                           GPIO_FUNC(2));
  

•   s5p_gpio_cfg_pin(&gpio1->y0, 4, GPIO_FUNC(2));
  

•   s5p_gpio_cfg_pin(&gpio1->y0, 5, GPIO_FUNC(2));
  

•   for (i = 0; i < 4; i++)
  

•           s5p_gpio_cfg_pin(&gpio1->y1, i, GPIO_FUNC(2));
  

•   /*
  

•    * EBI: 8 Addrss Lines
  

•    *
  

•    * GPY3[0]      EBI_ADDR[0](2)
  

•    * GPY3[1]      EBI_ADDR[1](2)
  

•    * GPY3[2]      EBI_ADDR[2](2)
  

•    * GPY3[3]      EBI_ADDR[3](2)
  

•    * GPY3[4]      EBI_ADDR[4](2)
  

•    * GPY3[5]      EBI_ADDR[5](2)
  

•    * GPY3[6]      EBI_ADDR[6](2)
  

•    * GPY3[7]      EBI_ADDR[7](2)
  

•    *
  

•    * EBI: 16 Data Lines
  

•    *
  

•    * GPY5[0]      EBI_DATA[0](2)
  

•    * GPY5[1]      EBI_DATA[1](2)
  

•    * GPY5[2]      EBI_DATA[2](2)
  

•    * GPY5[3]      EBI_DATA[3](2)
  

•    * GPY5[4]      EBI_DATA[4](2)
  

•    * GPY5[5]      EBI_DATA[5](2)
  

•    * GPY5[6]      EBI_DATA[6](2)
  

•    * GPY5[7]      EBI_DATA[7](2)
  

•    *
  

•    * GPY6[0]      EBI_DATA[8](2)
  

•    * GPY6[1]      EBI_DATA[9](2)
  

•    * GPY6[2]      EBI_DATA[10](2)
  

•    * GPY6[3]      EBI_DATA[11](2)
  

•    * GPY6[4]      EBI_DATA[12](2)
  

•    * GPY6[5]      EBI_DATA[13](2)
  

•    * GPY6[6]      EBI_DATA[14](2)
  

•    * GPY6[7]      EBI_DATA[15](2)
  

•    */
  

•   for (i = 0; i < 8; i++) {
  

•           s5p_gpio_cfg_pin(&gpio1->y3, i, GPIO_FUNC(2));
  

•           s5p_gpio_set_pull(&gpio1->y3, i, GPIO_PULL_UP);
  

•           s5p_gpio_cfg_pin(&gpio1->y5, i, GPIO_FUNC(2));
  

•           s5p_gpio_set_pull(&gpio1->y5, i, GPIO_PULL_UP);
  

•           s5p_gpio_cfg_pin(&gpio1->y6, i, GPIO_FUNC(2));
  

•           s5p_gpio_set_pull(&gpio1->y6, i, GPIO_PULL_UP);
  

•   }
  

+}

+static int exynos5_pinmux_config(int peripheral, int flags) +{

•   switch (peripheral) {
  

•   case PERIPH_ID_UART0:
  

•   case PERIPH_ID_UART1:
  

•   case PERIPH_ID_UART2:
  

•   case PERIPH_ID_UART3:
  

•           exynos5_uart_config(peripheral);
  

•           break;
  

•   case PERIPH_ID_SDMMC0:
  

•   case PERIPH_ID_SDMMC1:
  

•   case PERIPH_ID_SDMMC2:
  

•   case PERIPH_ID_SDMMC3:
  

•           exynos5_mmc_config(peripheral, flags);
  
  

and check return value here

•           break;
  

•   case PERIPH_ID_SROMC:
  

•           exynos5_sromc_config(flags);
  

•           break;
  

•   default:
  

•           debug("%s: invalid peripheral %d", __func__, peripheral);
  

•           return -1;
  

•   }
  

•   return 0;
  

+}

+int exynos_pinmux_config(int peripheral, int flags) +{

•   if (cpu_is_exynos5())
  

•           return exynos5_pinmux_config(peripheral, flags);
  

•   else {
  

•           debug("pinmux functionality not supported\n");
  

•           return -1;
  

•   }
  

+} diff --git a/arch/arm/include/asm/arch-exynos/periph.h b/arch/arm/include/asm/arch-exynos/periph.h new file mode 100644 index 0000000..5db25aa --- /dev/null +++ b/arch/arm/include/asm/arch-exynos/periph.h @@ -0,0 +1,47 @@ +/*

• • Copyright (C) 2012 Samsung Electronics
• • Rajeshwari Shinde rajeshwari.s@samsung.com
• • 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 __ASM_ARM_ARCH_PERIPH_H +#define __ASM_ARM_ARCH_PERIPH_H

+/*

• • Peripherals requiring clock/pinmux configuration. List will
• • grow with support for more devices getting added.
• */

+enum periph_id {

•   PERIPH_ID_SDMMC0,
  

•   PERIPH_ID_SDMMC1,
  

•   PERIPH_ID_SDMMC2,
  

•   PERIPH_ID_SDMMC3,
  

•   PERIPH_ID_SROMC,
  

•   PERIPH_ID_UART0,
  

•   PERIPH_ID_UART1,
  

•   PERIPH_ID_UART2,
  

•   PERIPH_ID_UART3,
  

•   PERIPH_ID_COUNT,
  

•   PERIPH_ID_NONE = -1,
  

+};

+#endif /* __ASM_ARM_ARCH_PERIPH_H */ diff --git a/arch/arm/include/asm/arch-exynos/pinmux.h b/arch/arm/include/asm/arch-exynos/pinmux.h new file mode 100644 index 0000000..10ea736 --- /dev/null +++ b/arch/arm/include/asm/arch-exynos/pinmux.h @@ -0,0 +1,58 @@ +/*

• • Copyright (C) 2012 Samsung Electronics
• • Abhilash Kesavan a.kesavan@samsung.com
• • 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 __ASM_ARM_ARCH_PINMUX_H +#define __ASM_ARM_ARCH_PINMUX_H

+#include "periph.h"

+/*

• • Flags for setting specific configarations of peripherals.
• • List will grow with support for more devices getting added.
• */

+enum {

•   PINMUX_FLAG_NONE        = 0x00000000,
  

•   /* Flags for eMMC */
  

•   PINMUX_FLAG_8BIT_MODE   = 1 << 0,       /* SDMMC 8-bit mode */
  

•   /* Flags for SROM controller */
  

•   PINMUX_FLAG_BANK        = 3 << 0,       /* bank number (0-3) */
  

•   PINMUX_FLAG_16BIT       = 1 << 2,       /* 16-bit width */
  

+};

+/**

• • Configures the pinmux for a particular peripheral.
• • Each gpio can be configured in many different ways (4 bits on exynos)
• • such as "input", "output", "special function", "external interrupt"
• • etc. This function will configure the peripheral pinmux along with
• • pull-up/down and drive strength.
• • @param peripheral peripheral to be configured
• • @param flags configure flags
• • @return 0 if ok, -1 on error (e.g. unsupported peripheral)
• */

+int exynos_pinmux_config(int peripheral, int flags);

+#endif

1.7.4.4

Regards, Simon