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authorMathieu J. Poirier <mathieu.poirier@linaro.org>2012-08-03 11:05:12 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-08-14 02:21:39 +0200
commitabae6555deb632c02f9211d8b4e6876e21f39e1c (patch)
tree8130c075e3b65e30d244371206584f72f9a8699d /arch
parenta1cd53c6b6e2e7fbf4ffa20d3548646e4c94efe5 (diff)
downloadu-boot-linaro-stable-abae6555deb632c02f9211d8b4e6876e21f39e1c.tar.gz
snowball: Add support for ux500 based snowball board
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: John Rigby <john.rigby@linaro.org> Acked-by: Tom Rini <trini@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/arch-u8500/db8500_gpio.h42
-rw-r--r--arch/arm/include/asm/arch-u8500/db8500_pincfg.h170
2 files changed, 212 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-u8500/db8500_gpio.h b/arch/arm/include/asm/arch-u8500/db8500_gpio.h
new file mode 100644
index 000000000..7c85a8917
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/db8500_gpio.h
@@ -0,0 +1,42 @@
+/*
+ * Structures and registers for GPIO access in the Nomadik SoC
+ *
+ * Code ported from Nomadik GPIO driver in ST-Ericsson Linux kernel code.
+ * The purpose is that GPIO config found in kernel should work by simply
+ * copy-paste it to U-boot.
+ *
+ * Ported to U-boot by:
+ * Copyright (C) 2010 Joakim Axelsson <joakim.axelsson AT stericsson.com>
+ * Copyright (C) 2008 STMicroelectronics
+ * Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
+ * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DB8500_GPIO_H__
+#define __DB8500_GPIO_H__
+
+/* Alternate functions: function C is set in hw by setting both A and B */
+enum db8500_gpio_alt {
+ DB8500_GPIO_ALT_GPIO = 0,
+ DB8500_GPIO_ALT_A = 1,
+ DB8500_GPIO_ALT_B = 2,
+ DB8500_GPIO_ALT_C = (DB8500_GPIO_ALT_A | DB8500_GPIO_ALT_B)
+};
+
+enum db8500_gpio_pull {
+ DB8500_GPIO_PULL_NONE,
+ DB8500_GPIO_PULL_UP,
+ DB8500_GPIO_PULL_DOWN
+};
+
+void db8500_gpio_set_pull(unsigned gpio, enum db8500_gpio_pull pull);
+void db8500_gpio_make_input(unsigned gpio);
+int db8500_gpio_get_input(unsigned gpio);
+void db8500_gpio_make_output(unsigned gpio, int val);
+void db8500_gpio_set_output(unsigned gpio, int val);
+
+#endif /* __DB8500_GPIO_H__ */
diff --git a/arch/arm/include/asm/arch-u8500/db8500_pincfg.h b/arch/arm/include/asm/arch-u8500/db8500_pincfg.h
new file mode 100644
index 000000000..64957016c
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/db8500_pincfg.h
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Code ported from Nomadik GPIO driver in ST-Ericsson Linux kernel code.
+ * The purpose is that GPIO config found in kernel should work by simply
+ * copy-paste it to U-boot. Ported 2010 to U-boot by:
+ * Author: Joakim Axelsson <joakim.axelsson AT stericsson.com>
+ *
+ * License terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
+ *
+ *
+ * Based on arch/arm/mach-pxa/include/mach/mfp.h:
+ * Copyright (C) 2007 Marvell International Ltd.
+ * eric miao <eric.miao@marvell.com>
+ */
+
+#ifndef __DB8500_PINCFG_H
+#define __DB8500_PINCFG_H
+
+#include "db8500_gpio.h"
+
+/*
+ * U-boot info:
+ * SLPM (sleep mode) config will be ignored by U-boot but it is still
+ * possible to configure it in order to keep cut-n-paste compability
+ * with Linux kernel config.
+ *
+ * pin configurations are represented by 32-bit integers:
+ *
+ * bit 0.. 8 - Pin Number (512 Pins Maximum)
+ * bit 9..10 - Alternate Function Selection
+ * bit 11..12 - Pull up/down state
+ * bit 13 - Sleep mode behaviour (not used in U-boot)
+ * bit 14 - Direction
+ * bit 15 - Value (if output)
+ * bit 16..18 - SLPM pull up/down state (not used in U-boot)
+ * bit 19..20 - SLPM direction (not used in U-boot)
+ * bit 21..22 - SLPM Value (if output) (not used in U-boot)
+ *
+ * to facilitate the definition, the following macros are provided
+ *
+ * PIN_CFG_DEFAULT - default config (0):
+ * pull up/down = disabled
+ * sleep mode = input/wakeup
+ * direction = input
+ * value = low
+ * SLPM direction = same as normal
+ * SLPM pull = same as normal
+ * SLPM value = same as normal
+ *
+ * PIN_CFG - default config with alternate function
+ * PIN_CFG_PULL - default config with alternate function and pull up/down
+ */
+
+/* Sleep mode */
+enum db8500_gpio_slpm {
+ DB8500_GPIO_SLPM_INPUT,
+ DB8500_GPIO_SLPM_WAKEUP_ENABLE = DB8500_GPIO_SLPM_INPUT,
+ DB8500_GPIO_SLPM_NOCHANGE,
+ DB8500_GPIO_SLPM_WAKEUP_DISABLE = DB8500_GPIO_SLPM_NOCHANGE,
+};
+
+#define PIN_NUM_MASK 0x1ff
+#define PIN_NUM(x) ((x) & PIN_NUM_MASK)
+
+#define PIN_ALT_SHIFT 9
+#define PIN_ALT_MASK (0x3 << PIN_ALT_SHIFT)
+#define PIN_ALT(x) (((x) & PIN_ALT_MASK) >> PIN_ALT_SHIFT)
+#define PIN_GPIO (DB8500_GPIO_ALT_GPIO << PIN_ALT_SHIFT)
+#define PIN_ALT_A (DB8500_GPIO_ALT_A << PIN_ALT_SHIFT)
+#define PIN_ALT_B (DB8500_GPIO_ALT_B << PIN_ALT_SHIFT)
+#define PIN_ALT_C (DB8500_GPIO_ALT_C << PIN_ALT_SHIFT)
+
+#define PIN_PULL_SHIFT 11
+#define PIN_PULL_MASK (0x3 << PIN_PULL_SHIFT)
+#define PIN_PULL(x) (((x) & PIN_PULL_MASK) >> PIN_PULL_SHIFT)
+#define PIN_PULL_NONE (DB8500_GPIO_PULL_NONE << PIN_PULL_SHIFT)
+#define PIN_PULL_UP (DB8500_GPIO_PULL_UP << PIN_PULL_SHIFT)
+#define PIN_PULL_DOWN (DB8500_GPIO_PULL_DOWN << PIN_PULL_SHIFT)
+
+#define PIN_SLPM_SHIFT 13
+#define PIN_SLPM_MASK (0x1 << PIN_SLPM_SHIFT)
+#define PIN_SLPM(x) (((x) & PIN_SLPM_MASK) >> PIN_SLPM_SHIFT)
+#define PIN_SLPM_MAKE_INPUT (DB8500_GPIO_SLPM_INPUT << PIN_SLPM_SHIFT)
+#define PIN_SLPM_NOCHANGE (DB8500_GPIO_SLPM_NOCHANGE << PIN_SLPM_SHIFT)
+/* These two replace the above in DB8500v2+ */
+#define PIN_SLPM_WAKEUP_ENABLE \
+ (DB8500_GPIO_SLPM_WAKEUP_ENABLE << PIN_SLPM_SHIFT)
+#define PIN_SLPM_WAKEUP_DISABLE \
+ (DB8500_GPIO_SLPM_WAKEUP_DISABLE << PIN_SLPM_SHIFT)
+
+#define PIN_DIR_SHIFT 14
+#define PIN_DIR_MASK (0x1 << PIN_DIR_SHIFT)
+#define PIN_DIR(x) (((x) & PIN_DIR_MASK) >> PIN_DIR_SHIFT)
+#define PIN_DIR_INPUT (0 << PIN_DIR_SHIFT)
+#define PIN_DIR_OUTPUT (1 << PIN_DIR_SHIFT)
+
+#define PIN_VAL_SHIFT 15
+#define PIN_VAL_MASK (0x1 << PIN_VAL_SHIFT)
+#define PIN_VAL(x) (((x) & PIN_VAL_MASK) >> PIN_VAL_SHIFT)
+#define PIN_VAL_LOW (0 << PIN_VAL_SHIFT)
+#define PIN_VAL_HIGH (1 << PIN_VAL_SHIFT)
+
+#define PIN_SLPM_PULL_SHIFT 16
+#define PIN_SLPM_PULL_MASK (0x7 << PIN_SLPM_PULL_SHIFT)
+#define PIN_SLPM_PULL(x) \
+ (((x) & PIN_SLPM_PULL_MASK) >> PIN_SLPM_PULL_SHIFT)
+#define PIN_SLPM_PULL_NONE \
+ ((1 + DB8500_GPIO_PULL_NONE) << PIN_SLPM_PULL_SHIFT)
+#define PIN_SLPM_PULL_UP \
+ ((1 + DB8500_GPIO_PULL_UP) << PIN_SLPM_PULL_SHIFT)
+#define PIN_SLPM_PULL_DOWN \
+ ((1 + DB8500_GPIO_PULL_DOWN) << PIN_SLPM_PULL_SHIFT)
+
+#define PIN_SLPM_DIR_SHIFT 19
+#define PIN_SLPM_DIR_MASK (0x3 << PIN_SLPM_DIR_SHIFT)
+#define PIN_SLPM_DIR(x) \
+ (((x) & PIN_SLPM_DIR_MASK) >> PIN_SLPM_DIR_SHIFT)
+#define PIN_SLPM_DIR_INPUT ((1 + 0) << PIN_SLPM_DIR_SHIFT)
+#define PIN_SLPM_DIR_OUTPUT ((1 + 1) << PIN_SLPM_DIR_SHIFT)
+
+#define PIN_SLPM_VAL_SHIFT 21
+#define PIN_SLPM_VAL_MASK (0x3 << PIN_SLPM_VAL_SHIFT)
+#define PIN_SLPM_VAL(x) \
+ (((x) & PIN_SLPM_VAL_MASK) >> PIN_SLPM_VAL_SHIFT)
+#define PIN_SLPM_VAL_LOW ((1 + 0) << PIN_SLPM_VAL_SHIFT)
+#define PIN_SLPM_VAL_HIGH ((1 + 1) << PIN_SLPM_VAL_SHIFT)
+
+/* Shortcuts. Use these instead of separate DIR, PULL, and VAL. */
+#define PIN_INPUT_PULLDOWN (PIN_DIR_INPUT | PIN_PULL_DOWN)
+#define PIN_INPUT_PULLUP (PIN_DIR_INPUT | PIN_PULL_UP)
+#define PIN_INPUT_NOPULL (PIN_DIR_INPUT | PIN_PULL_NONE)
+#define PIN_OUTPUT_LOW (PIN_DIR_OUTPUT | PIN_VAL_LOW)
+#define PIN_OUTPUT_HIGH (PIN_DIR_OUTPUT | PIN_VAL_HIGH)
+
+#define PIN_SLPM_INPUT_PULLDOWN (PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_DOWN)
+#define PIN_SLPM_INPUT_PULLUP (PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_UP)
+#define PIN_SLPM_INPUT_NOPULL (PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_NONE)
+#define PIN_SLPM_OUTPUT_LOW (PIN_SLPM_DIR_OUTPUT | PIN_SLPM_VAL_LOW)
+#define PIN_SLPM_OUTPUT_HIGH (PIN_SLPM_DIR_OUTPUT | PIN_SLPM_VAL_HIGH)
+
+#define PIN_CFG_DEFAULT (0)
+
+#define PIN_CFG(num, alt) \
+ (PIN_CFG_DEFAULT |\
+ (PIN_NUM(num) | PIN_##alt))
+
+#define PIN_CFG_INPUT(num, alt, pull) \
+ (PIN_CFG_DEFAULT |\
+ (PIN_NUM(num) | PIN_##alt | PIN_INPUT_##pull))
+
+#define PIN_CFG_OUTPUT(num, alt, val) \
+ (PIN_CFG_DEFAULT |\
+ (PIN_NUM(num) | PIN_##alt | PIN_OUTPUT_##val))
+
+#define PIN_CFG_PULL(num, alt, pull) \
+ ((PIN_CFG_DEFAULT & ~PIN_PULL_MASK) |\
+ (PIN_NUM(num) | PIN_##alt | PIN_PULL_##pull))
+
+/**
+ * db8500_gpio_config_pins - configure several pins at once
+ * @cfgs: array of pin configurations
+ * @num: number of elments in the array
+ *
+ * Configures several GPIO pins.
+ */
+void db8500_gpio_config_pins(unsigned long *cfgs, size_t num);
+
+#endif