353 lines
9.6 KiB
C
353 lines
9.6 KiB
C
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/*
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* Copyright (C) 2009 Nokia
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* Copyright (C) 2009-2010 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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/* omap3/4/5 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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#define OMAP_WAKEUP_EVENT (1 << 15)
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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(partition, x) (((x) & OMAP_MUX_MODE7) == \
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partition->gpio)
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#define OMAP_MODE_UART(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE0)
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/* Flags for omapX_mux_init */
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#define OMAP_PACKAGE_MASK 0xffff
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#define OMAP_PACKAGE_CBP 6 /* 515-pin 0.40 0.50 */
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#define OMAP_PACKAGE_CUS 5 /* 423-pin 0.65 */
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#define OMAP_PACKAGE_CBB 4 /* 515-pin 0.40 0.50 */
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#define OMAP_PACKAGE_CBC 3 /* 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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* omap_mux_init flags definition:
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*
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* OMAP_GPIO_MUX_MODE, bits 0-2: gpio muxing mode, same like pad control
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* register which includes values from 0-7.
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* OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
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* The default value is 16 bits.
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*/
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#define OMAP_MUX_GPIO_IN_MODE0 OMAP_MUX_MODE0
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#define OMAP_MUX_GPIO_IN_MODE1 OMAP_MUX_MODE1
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#define OMAP_MUX_GPIO_IN_MODE2 OMAP_MUX_MODE2
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#define OMAP_MUX_GPIO_IN_MODE3 OMAP_MUX_MODE3
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#define OMAP_MUX_GPIO_IN_MODE4 OMAP_MUX_MODE4
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#define OMAP_MUX_GPIO_IN_MODE5 OMAP_MUX_MODE5
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#define OMAP_MUX_GPIO_IN_MODE6 OMAP_MUX_MODE6
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#define OMAP_MUX_GPIO_IN_MODE7 OMAP_MUX_MODE7
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#define OMAP_MUX_REG_8BIT (1 << 3)
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/**
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* struct omap_board_data - board specific device data
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* @id: instance id
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* @flags: additional flags for platform init code
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* @pads: array of device specific pads
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* @pads_cnt: ARRAY_SIZE() of pads
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*/
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struct omap_board_data {
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int id;
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u32 flags;
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struct omap_device_pad *pads;
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int pads_cnt;
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};
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/**
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* struct mux_partition - contain partition related information
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* @name: name of the current partition
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* @flags: flags specific to this partition
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* @gpio: gpio mux mode
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* @phys: physical address
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* @size: partition size
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* @base: virtual address after ioremap
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* @muxmodes: list of nodes that belong to a partition
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* @node: list node for the partitions linked list
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*/
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struct omap_mux_partition {
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const char *name;
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u32 flags;
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u32 gpio;
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u32 phys;
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u32 size;
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void __iomem *base;
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struct list_head muxmodes;
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struct list_head node;
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};
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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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* @balls: available balls on the package
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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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#define OMAP_DEVICE_PAD_REMUX BIT(1) /* Dynamically remux a pad,
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needs enable, idle and off
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values */
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#define OMAP_DEVICE_PAD_WAKEUP BIT(0) /* Pad is wake-up capable */
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/**
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* struct omap_device_pad - device specific pad configuration
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* @name: signal name
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* @flags: pad specific runtime flags
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* @enable: runtime value for a pad
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* @idle: idle value for a pad
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* @off: off value for a pad, defaults to safe mode
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* @partition: mux partition
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* @mux: mux register
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*/
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struct omap_device_pad {
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char *name;
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u8 flags;
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u16 enable;
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u16 idle;
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u16 off;
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struct omap_mux_partition *partition;
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struct omap_mux *mux;
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};
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struct omap_hwmod_mux_info;
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#define OMAP_MUX_STATIC(signal, mode) \
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{ \
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.name = (signal), \
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.enable = (mode), \
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}
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#if defined(CONFIG_OMAP_MUX)
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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(const char *muxname, int val);
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/**
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* omap_hwmod_mux_init - initialize hwmod specific mux data
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* @bpads: Board specific device signal names
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* @nr_pads: Number of signal names for the device
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*/
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extern struct omap_hwmod_mux_info *
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omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
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/**
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* omap_hwmod_mux - omap hwmod specific pin muxing
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* @hmux: Pads for a hwmod
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* @state: Desired _HWMOD_STATE
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*
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* Called only from omap_hwmod.c, do not use.
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*/
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void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state);
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int omap_mux_get_by_name(const char *muxname,
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struct omap_mux_partition **found_partition,
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struct omap_mux **found_mux);
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#else
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static inline int omap_mux_get_by_name(const char *muxname,
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struct omap_mux_partition **found_partition,
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struct omap_mux **found_mux)
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{
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return 0;
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}
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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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static inline struct omap_hwmod_mux_info *
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omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
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{
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return NULL;
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}
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static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
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{
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}
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static struct omap_board_mux *board_mux __maybe_unused;
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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_get() - get a mux partition by name
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* @name: Name of the mux partition
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*
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*/
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struct omap_mux_partition *omap_mux_get(const char *name);
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/**
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* omap_mux_read() - read mux register
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* @partition: Mux partition
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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(struct omap_mux_partition *p, u16 mux_offset);
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/**
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* omap_mux_write() - write mux register
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* @partition: Mux partition
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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(struct omap_mux_partition *p, 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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* @partition: Mux partition
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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_mux_partition *p,
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struct omap_board_mux *board_mux);
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/**
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* omap2420_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 omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
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/**
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* omap2430_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 omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
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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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* omap4_mux_init() - initialize mux system with board specific set
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* @board_subset: Board specific mux table
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* @board_wkup_subset: Board specific mux table for wakeup instance
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* @flags: OMAP package type used for the board
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*/
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int omap4_mux_init(struct omap_board_mux *board_subset,
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struct omap_board_mux *board_wkup_subset, 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(const char *name, u32 flags,
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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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