d4bb72e50a
Make the omap_mux_read and write available for board code, and rename omap_mux_set_board_signals into omap_mux_write_array. Also add the related prototypes and comments into mux.h. In some cases we want to change the signals dynamically, mostly for power management. Note that we cannot use the signal names as they are set __init to save memory. Signed-off-by: Tony Lindgren <tony@atomide.com>
188 lines
5.0 KiB
C
188 lines
5.0 KiB
C
/*
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* Copyright (C) 2009 Nokia
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* Copyright (C) 2009 Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "mux34xx.h"
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#define OMAP_MUX_TERMINATOR 0xffff
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/* 34xx mux mode options for each pin. See TRM for options */
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#define OMAP_MUX_MODE0 0
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#define OMAP_MUX_MODE1 1
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#define OMAP_MUX_MODE2 2
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#define OMAP_MUX_MODE3 3
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#define OMAP_MUX_MODE4 4
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#define OMAP_MUX_MODE5 5
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#define OMAP_MUX_MODE6 6
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#define OMAP_MUX_MODE7 7
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/* 24xx/34xx mux bit defines */
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#define OMAP_PULL_ENA (1 << 3)
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#define OMAP_PULL_UP (1 << 4)
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#define OMAP_ALTELECTRICALSEL (1 << 5)
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/* 34xx specific mux bit defines */
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#define OMAP_INPUT_EN (1 << 8)
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#define OMAP_OFF_EN (1 << 9)
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#define OMAP_OFFOUT_EN (1 << 10)
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#define OMAP_OFFOUT_VAL (1 << 11)
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#define OMAP_OFF_PULL_EN (1 << 12)
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#define OMAP_OFF_PULL_UP (1 << 13)
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#define OMAP_WAKEUP_EN (1 << 14)
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/* Active pin states */
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#define OMAP_PIN_OUTPUT 0
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#define OMAP_PIN_INPUT OMAP_INPUT_EN
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#define OMAP_PIN_INPUT_PULLUP (OMAP_PULL_ENA | OMAP_INPUT_EN \
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| OMAP_PULL_UP)
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#define OMAP_PIN_INPUT_PULLDOWN (OMAP_PULL_ENA | OMAP_INPUT_EN)
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/* Off mode states */
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#define OMAP_PIN_OFF_NONE 0
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#define OMAP_PIN_OFF_OUTPUT_HIGH (OMAP_OFF_EN | OMAP_OFFOUT_EN \
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| OMAP_OFFOUT_VAL)
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#define OMAP_PIN_OFF_OUTPUT_LOW (OMAP_OFF_EN | OMAP_OFFOUT_EN)
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#define OMAP_PIN_OFF_INPUT_PULLUP (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
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| OMAP_OFF_PULL_UP)
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#define OMAP_PIN_OFF_INPUT_PULLDOWN (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
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#define OMAP_PIN_OFF_WAKEUPENABLE OMAP_WAKEUP_EN
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#define OMAP_MODE_GPIO(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
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/* Flags for omap_mux_init */
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#define OMAP_PACKAGE_MASK 0xffff
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#define OMAP_PACKAGE_CBP 4 /* 515-pin 0.40 0.50 */
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#define OMAP_PACKAGE_CUS 3 /* 423-pin 0.65 */
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#define OMAP_PACKAGE_CBB 2 /* 515-pin 0.40 0.50 */
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#define OMAP_PACKAGE_CBC 1 /* 515-pin 0.50 0.65 */
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#define OMAP_MUX_NR_MODES 8 /* Available modes */
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#define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
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/**
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* struct omap_mux - data for omap mux register offset and it's value
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* @reg_offset: mux register offset from the mux base
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* @gpio: GPIO number
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* @muxnames: available signal modes for a ball
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*/
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struct omap_mux {
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u16 reg_offset;
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u16 gpio;
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#ifdef CONFIG_OMAP_MUX
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char *muxnames[OMAP_MUX_NR_MODES];
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#ifdef CONFIG_DEBUG_FS
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char *balls[OMAP_MUX_NR_SIDES];
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#endif
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#endif
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};
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/**
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* struct omap_ball - data for balls on omap package
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* @reg_offset: mux register offset from the mux base
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* @balls: available balls on the package
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*/
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struct omap_ball {
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u16 reg_offset;
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char *balls[OMAP_MUX_NR_SIDES];
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};
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/**
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* struct omap_board_mux - data for initializing mux registers
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* @reg_offset: mux register offset from the mux base
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* @mux_value: desired mux value to set
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*/
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struct omap_board_mux {
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u16 reg_offset;
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u16 value;
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};
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#if defined(CONFIG_OMAP_MUX) && defined(CONFIG_ARCH_OMAP34XX)
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/**
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* omap_mux_init_gpio - initialize a signal based on the GPIO number
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* @gpio: GPIO number
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* @val: Options for the mux register value
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*/
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int omap_mux_init_gpio(int gpio, int val);
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/**
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* omap_mux_init_signal - initialize a signal based on the signal name
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* @muxname: Mux name in mode0_name.signal_name format
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* @val: Options for the mux register value
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*/
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int omap_mux_init_signal(char *muxname, int val);
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#else
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static inline int omap_mux_init_gpio(int gpio, int val)
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{
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return 0;
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}
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static inline int omap_mux_init_signal(char *muxname, int val)
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{
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return 0;
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}
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#endif
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/**
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* omap_mux_get_gpio() - get mux register value based on GPIO number
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* @gpio: GPIO number
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*
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*/
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u16 omap_mux_get_gpio(int gpio);
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/**
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* omap_mux_set_gpio() - set mux register value based on GPIO number
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* @val: New mux register value
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* @gpio: GPIO number
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*
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*/
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void omap_mux_set_gpio(u16 val, int gpio);
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/**
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* omap_mux_read() - read mux register
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* @mux_offset: Offset of the mux register
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*
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*/
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u16 omap_mux_read(u16 mux_offset);
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/**
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* omap_mux_write() - write mux register
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* @val: New mux register value
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* @mux_offset: Offset of the mux register
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*
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* This should be only needed for dynamic remuxing of non-gpio signals.
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*/
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void omap_mux_write(u16 val, u16 mux_offset);
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/**
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* omap_mux_write_array() - write an array of mux registers
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* @board_mux: Array of mux registers terminated by MAP_MUX_TERMINATOR
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*
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* This should be only needed for dynamic remuxing of non-gpio signals.
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*/
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void omap_mux_write_array(struct omap_board_mux *board_mux);
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/**
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* omap3_mux_init() - initialize mux system with board specific set
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* @board_mux: Board specific mux table
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* @flags: OMAP package type used for the board
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*/
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int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
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/**
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* omap_mux_init - private mux init function, do not call
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*/
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int omap_mux_init(u32 mux_pbase, u32 mux_size,
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struct omap_mux *superset,
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struct omap_mux *package_subset,
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struct omap_board_mux *board_mux,
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struct omap_ball *package_balls);
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