ARM: tegra: pinctrl: remove duplication

Much of arch/arm/cpu/tegra*-common/pinmux.c is identical. Remove the
duplication by creating pinmux-common.c for all the identical code.

This leaves:
* arch/arm/include/asm/arch-tegra*/pinmux.h defining only the names of
  the various pins/pin groups, drive groups, and mux functions.
* arch/arm/cpu/tegra*-common/pinmux.c containing only the lookup table
  stating which pin groups support which mux functions.

The code in pinmux-common.c is semantically identical to that in the
various original pinmux.c, but had some consistency and cleanup fixes
applied during migration.

I removed the definition of struct pmux_tri_ctlr, since this is different
between SoCs (especially Tegra20 vs all others), and it's much simpler to
deal with this via the new REG/MUX_REG/... defines. spl.c, warmboot.c,
and warmboot_avp.c needed updates due to this, since they previously
hijacked this struct to encode the location of some non-pinmux registers.
Now, that code simply calculates these register addresses directly using
simple and obvious math. I like this method better irrespective of the
pinmux code cleanup anyway.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

1 files changed, 189 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-tegra/pinmux.h b/arch/arm/include/asm/arch-tegra/pinmux.h
new file mode 100644
index 0000000000..e97fffdcf8
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra/pinmux.h
@@ -0,0 +1,189 @@
+/*
+ * (C) Copyright 2010-2014
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef _TEGRA_PINMUX_H_
+#define _TEGRA_PINMUX_H_
+
+#include <asm/arch/tegra.h>
+
+/* The pullup/pulldown state of a pin group */
+enum pmux_pull {
+	PMUX_PULL_NORMAL = 0,
+	PMUX_PULL_DOWN,
+	PMUX_PULL_UP,
+};
+
+/* Defines whether a pin group is tristated or in normal operation */
+enum pmux_tristate {
+	PMUX_TRI_NORMAL = 0,
+	PMUX_TRI_TRISTATE = 1,
+};
+
+#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
+enum pmux_pin_io {
+	PMUX_PIN_OUTPUT = 0,
+	PMUX_PIN_INPUT = 1,
+	PMUX_PIN_NONE,
+};
+
+enum pmux_pin_lock {
+	PMUX_PIN_LOCK_DEFAULT = 0,
+	PMUX_PIN_LOCK_DISABLE,
+	PMUX_PIN_LOCK_ENABLE,
+};
+
+enum pmux_pin_od {
+	PMUX_PIN_OD_DEFAULT = 0,
+	PMUX_PIN_OD_DISABLE,
+	PMUX_PIN_OD_ENABLE,
+};
+
+enum pmux_pin_ioreset {
+	PMUX_PIN_IO_RESET_DEFAULT = 0,
+	PMUX_PIN_IO_RESET_DISABLE,
+	PMUX_PIN_IO_RESET_ENABLE,
+};
+
+#ifdef TEGRA_PMX_HAS_RCV_SEL
+enum pmux_pin_rcv_sel {
+	PMUX_PIN_RCV_SEL_DEFAULT = 0,
+	PMUX_PIN_RCV_SEL_NORMAL,
+	PMUX_PIN_RCV_SEL_HIGH,
+};
+#endif /* TEGRA_PMX_HAS_RCV_SEL */
+#endif /* TEGRA_PMX_HAS_PIN_IO_BIT_ETC */
+
+/*
+ * This defines the configuration for a pin, including the function assigned,
+ * pull up/down settings and tristate settings. Having set up one of these
+ * you can call pinmux_config_pingroup() to configure a pin in one step. Also
+ * available is pinmux_config_table() to configure a list of pins.
+ */
+struct pingroup_config {
+	enum pmux_pingrp pingroup;	/* pin group PINGRP_...             */
+	enum pmux_func func;		/* function to assign FUNC_...      */
+	enum pmux_pull pull;		/* pull up/down/normal PMUX_PULL_...*/
+	enum pmux_tristate tristate;	/* tristate or normal PMUX_TRI_...  */
+#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
+	enum pmux_pin_io io;		/* input or output PMUX_PIN_...  */
+	enum pmux_pin_lock lock;	/* lock enable/disable PMUX_PIN...  */
+	enum pmux_pin_od od;		/* open-drain or push-pull driver  */
+	enum pmux_pin_ioreset ioreset;	/* input/output reset PMUX_PIN...  */
+#ifdef TEGRA_PMX_HAS_RCV_SEL
+	enum pmux_pin_rcv_sel rcv_sel;	/* select between High and Normal  */
+					/* VIL/VIH receivers */
+#endif
+#endif
+};
+
+/* Set the mux function for a pin group */
+void pinmux_set_func(enum pmux_pingrp pin, enum pmux_func func);
+
+/* Set the pull up/down feature for a pin group */
+void pinmux_set_pullupdown(enum pmux_pingrp pin, enum pmux_pull pupd);
+
+/* Set a pin group to tristate or normal */
+void pinmux_set_tristate(enum pmux_pingrp pin, int enable);
+
+/* Set a pin group to tristate */
+void pinmux_tristate_enable(enum pmux_pingrp pin);
+
+/* Set a pin group to normal (non tristate) */
+void pinmux_tristate_disable(enum pmux_pingrp pin);
+
+#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
+/* Set a pin group as input or output */
+void pinmux_set_io(enum pmux_pingrp pin, enum pmux_pin_io io);
+#endif
+
+/* Set the complete configuration for a pin group */
+void pinmux_config_pingroup(const struct pingroup_config *config);
+
+/**
+ * Configure a list of pin groups
+ *
+ * @param config	List of config items
+ * @param len		Number of config items in list
+ */
+void pinmux_config_table(const struct pingroup_config *config, int len);
+
+#ifdef TEGRA_PMX_HAS_PADGRPS
+
+#define PGRP_SLWF_MIN	0
+#define PGRP_SLWF_MAX	3
+#define PGRP_SLWF_NONE	-1
+
+#define PGRP_SLWR_MIN	0
+#define PGRP_SLWR_MAX	3
+#define PGRP_SLWR_NONE	-1
+
+#define PGRP_DRVUP_MIN	0
+#define PGRP_DRVUP_MAX	127
+#define PGRP_DRVUP_NONE	-1
+
+#define PGRP_DRVDN_MIN	0
+#define PGRP_DRVDN_MAX	127
+#define PGRP_DRVDN_NONE	-1
+
+/* Defines a pin group cfg's low-power mode select */
+enum pgrp_lpmd {
+	PGRP_LPMD_X8 = 0,
+	PGRP_LPMD_X4,
+	PGRP_LPMD_X2,
+	PGRP_LPMD_X,
+	PGRP_LPMD_NONE = -1,
+};
+
+/* Defines whether a pin group cfg's schmidt is enabled or not */
+enum pgrp_schmt {
+	PGRP_SCHMT_DISABLE = 0,
+	PGRP_SCHMT_ENABLE = 1,
+	PGRP_SCHMT_NONE = -1,
+};
+
+/* Defines whether a pin group cfg's high-speed mode is enabled or not */
+enum pgrp_hsm {
+	PGRP_HSM_DISABLE = 0,
+	PGRP_HSM_ENABLE = 1,
+	PGRP_HSM_NONE = -1,
+};
+
+/*
+ * This defines the configuration for a pin group's pad control config
+ */
+struct padctrl_config {
+	enum pdrive_pingrp padgrp;	/* pin group PDRIVE_PINGRP_x */
+	int slwf;			/* falling edge slew         */
+	int slwr;			/* rising edge slew          */
+	int drvup;			/* pull-up drive strength    */
+	int drvdn;			/* pull-down drive strength  */
+	enum pgrp_lpmd lpmd;		/* low-power mode selection  */
+	enum pgrp_schmt schmt;		/* schmidt enable            */
+	enum pgrp_hsm hsm;		/* high-speed mode enable    */
+};
+
+/**
+ * Set the GP pad configs
+ *
+ * @param config	List of config items
+ * @param len		Number of config items in list
+ */
+void padgrp_config_table(const struct padctrl_config *config, int len);
+
+#endif /* TEGRA_PMX_HAS_PADGRPS */
+
+struct tegra_pingroup_desc {
+	enum pmux_func funcs[4];
+#if defined(CONFIG_TEGRA20)
+	u32 ctl_id;
+	u32 pull_id;
+#endif /* CONFIG_TEGRA20 */
+};
+
+extern const struct tegra_pingroup_desc *tegra_soc_pingroups;
+
+#endif /* _TEGRA_PINMUX_H_ */