[U-Boot] [PATCH 1/2] exynos5: pinmux: Added default pinumx settings
Rajeshwari Shinde
rajeshwari.s at samsung.com
Fri May 4 08:56:36 CEST 2012
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 at samsung.com>
Signed-off-by: Che-Liang Chiou <clchiou at chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
arch/arm/cpu/armv7/exynos/pinmux.c | 189 +++++++++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/pinmux.h | 77 ++++++++++++
2 files changed, 266 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/cpu/armv7/exynos/pinmux.c
create mode 100644 arch/arm/include/asm/arch-exynos/pinmux.h
diff --git a/arch/arm/cpu/armv7/exynos/pinmux.c b/arch/arm/cpu/armv7/exynos/pinmux.c
new file mode 100644
index 0000000..11f4b71
--- /dev/null
+++ b/arch/arm/cpu/armv7/exynos/pinmux.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright (c) 2012 Samsung Electronics.
+ * Abhilash Kesavan <a.kesavan at 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/cpu.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/sromc.h>
+
+int exynos5_pinmux_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, start, count;
+
+ switch (peripheral) {
+ case PERIPH_ID_UART0:
+ case PERIPH_ID_UART1:
+ case PERIPH_ID_UART2:
+ case PERIPH_ID_UART3:
+ 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));
+ }
+ break;
+ case PERIPH_ID_SDMMC0:
+ case PERIPH_ID_SDMMC1:
+ case PERIPH_ID_SDMMC2:
+ case PERIPH_ID_SDMMC3:
+ 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;
+ }
+ 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);
+ }
+ break;
+ case PERIPH_ID_SROMC:
+ /*
+ * 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);
+ }
+ 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/pinmux.h b/arch/arm/include/asm/arch-exynos/pinmux.h
new file mode 100644
index 0000000..306f521
--- /dev/null
+++ b/arch/arm/include/asm/arch-exynos/pinmux.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * Abhilash Kesavan <a.kesavan at 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
+
+/*
+ * 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_SDMMC4,
+ PERIPH_ID_SROMC,
+ PERIPH_ID_UART0,
+ PERIPH_ID_UART1,
+ PERIPH_ID_UART2,
+ PERIPH_ID_UART3,
+
+ PERIPH_ID_COUNT,
+ PERIPH_ID_NONE = -1,
+};
+
+/*
+ * 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
More information about the U-Boot
mailing list