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>

Conflicts:

	drivers/gpio/Makefile

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 0000000..7c85a89
--- /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 0000000..6495701
--- /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