omap: mux: Add new style pin multiplexing code for omap3
Initially only for 34xx. This code allows us to:
- Make the code more generic as the omap internal signal
names can stay the same across omap generations for some
devices
- Map mux registers to GPIO registers that is needed for
dynamic muxing of pins during off-idle
- Override bootloader mux values via kernel cmdline using
omap_mux=some.signa1=0x1234,some.signal2=0x1234
- View and set the mux registers via debugfs if
CONFIG_DEBUG_FS is enabled
Cc: Mike Rapoport <mike@compulab.co.il>
Cc: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h
new file mode 100644
index 0000000..bebe9cc
--- /dev/null
+++ b/arch/arm/mach-omap2/mux.h
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2009 Nokia
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * 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.
+ */
+
+#define OMAP_MUX_TERMINATOR 0xffff
+
+/* 34xx mux mode options for each pin. See TRM for options */
+#define OMAP_MUX_MODE0 0
+#define OMAP_MUX_MODE1 1
+#define OMAP_MUX_MODE2 2
+#define OMAP_MUX_MODE3 3
+#define OMAP_MUX_MODE4 4
+#define OMAP_MUX_MODE5 5
+#define OMAP_MUX_MODE6 6
+#define OMAP_MUX_MODE7 7
+
+/* 24xx/34xx mux bit defines */
+#define OMAP_PULL_ENA (1 << 3)
+#define OMAP_PULL_UP (1 << 4)
+#define OMAP_ALTELECTRICALSEL (1 << 5)
+
+/* 34xx specific mux bit defines */
+#define OMAP_INPUT_EN (1 << 8)
+#define OMAP_OFF_EN (1 << 9)
+#define OMAP_OFFOUT_EN (1 << 10)
+#define OMAP_OFFOUT_VAL (1 << 11)
+#define OMAP_OFF_PULL_EN (1 << 12)
+#define OMAP_OFF_PULL_UP (1 << 13)
+#define OMAP_WAKEUP_EN (1 << 14)
+
+/* Active pin states */
+#define OMAP_PIN_OUTPUT 0
+#define OMAP_PIN_INPUT OMAP_INPUT_EN
+#define OMAP_PIN_INPUT_PULLUP (OMAP_PULL_ENA | OMAP_INPUT_EN \
+ | OMAP_PULL_UP)
+#define OMAP_PIN_INPUT_PULLDOWN (OMAP_PULL_ENA | OMAP_INPUT_EN)
+
+/* Off mode states */
+#define OMAP_PIN_OFF_NONE 0
+#define OMAP_PIN_OFF_OUTPUT_HIGH (OMAP_OFF_EN | OMAP_OFFOUT_EN \
+ | OMAP_OFFOUT_VAL)
+#define OMAP_PIN_OFF_OUTPUT_LOW (OMAP_OFF_EN | OMAP_OFFOUT_EN)
+#define OMAP_PIN_OFF_INPUT_PULLUP (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
+ | OMAP_OFF_PULL_UP)
+#define OMAP_PIN_OFF_INPUT_PULLDOWN (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
+#define OMAP_PIN_OFF_WAKEUPENABLE OMAP_WAKEUP_EN
+
+#define OMAP_MODE_GPIO(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
+
+/* Flags for omap_mux_init */
+#define OMAP_PACKAGE_MASK 0xffff
+#define OMAP_PACKAGE_CUS 3 /* 423-pin 0.65 */
+#define OMAP_PACKAGE_CBB 2 /* 515-pin 0.40 0.50 */
+#define OMAP_PACKAGE_CBC 1 /* 515-pin 0.50 0.65 */
+
+
+#define OMAP_MUX_NR_MODES 8 /* Available modes */
+#define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
+
+/**
+ * struct omap_mux - data for omap mux register offset and it's value
+ * @reg_offset: mux register offset from the mux base
+ * @gpio: GPIO number
+ * @muxnames: available signal modes for a ball
+ */
+struct omap_mux {
+ u16 reg_offset;
+ u16 gpio;
+#ifdef CONFIG_OMAP_MUX
+ char *muxnames[OMAP_MUX_NR_MODES];
+#ifdef CONFIG_DEBUG_FS
+ char *balls[OMAP_MUX_NR_SIDES];
+#endif
+#endif
+};
+
+/**
+ * struct omap_ball - data for balls on omap package
+ * @reg_offset: mux register offset from the mux base
+ * @balls: available balls on the package
+ */
+struct omap_ball {
+ u16 reg_offset;
+ char *balls[OMAP_MUX_NR_SIDES];
+};
+
+/**
+ * struct omap_board_mux - data for initializing mux registers
+ * @reg_offset: mux register offset from the mux base
+ * @mux_value: desired mux value to set
+ */
+struct omap_board_mux {
+ u16 reg_offset;
+ u16 value;
+};
+
+#if defined(CONFIG_OMAP_MUX) && defined(CONFIG_ARCH_OMAP34XX)
+
+/**
+ * omap_mux_init_gpio - initialize a signal based on the GPIO number
+ * @gpio: GPIO number
+ * @val: Options for the mux register value
+ */
+int omap_mux_init_gpio(int gpio, int val);
+
+/**
+ * omap_mux_init_signal - initialize a signal based on the signal name
+ * @muxname: Mux name in mode0_name.signal_name format
+ * @val: Options for the mux register value
+ */
+int omap_mux_init_signal(char *muxname, int val);
+
+#else
+
+static inline int omap_mux_init_gpio(int gpio, int val)
+{
+ return 0;
+}
+static inline int omap_mux_init_signal(char *muxname, int val)
+{
+ return 0;
+}
+
+#endif
+
+/**
+ * omap_mux_get_gpio() - get mux register value based on GPIO number
+ * @gpio: GPIO number
+ *
+ */
+u16 omap_mux_get_gpio(int gpio);
+
+/**
+ * omap_mux_set_gpio() - set mux register value based on GPIO number
+ * @val: New mux register value
+ * @gpio: GPIO number
+ *
+ */
+void omap_mux_set_gpio(u16 val, int gpio);
+
+/**
+ * omap3_mux_init() - initialize mux system with board specific set
+ * @board_mux: Board specific mux table
+ * @flags: OMAP package type used for the board
+ */
+int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
+
+/**
+ * omap_mux_init - private mux init function, do not call
+ */
+int omap_mux_init(u32 mux_pbase, u32 mux_size,
+ struct omap_mux *superset,
+ struct omap_mux *package_subset,
+ struct omap_board_mux *board_mux,
+ struct omap_ball *package_balls);