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91930652a2
The commit (bce492c0 ARM: OMAP2+: UART: Fix incorrect population of
default uart pads) removed default uart pads that where getting populated
and which was making rx pin wakeup capable. If uart pads were used in
different mode by any other module then it would fail since the default
pads took over all the uart pins forcefully. With removal of default pads
the rx_pad wakeup for console uart while waking up from off mode is broken.
Utilise the mux api available to probe the availability of mux pins
in uart mode and probe for availability of uart pin in mux mode0
if uart is available as uart pin itself then configure rx pin
as wakeup capable.
This patch itself doesn't cater to all boards. Boards using uart rx wakeup
mechanism should ensure the usage of omap_serial_init_port by configuring
required uart ports and pass necessary mux data, till then this probing of
uart pins can cater to enabling of rx pad wakeup to most of the boards.
This patch can also throw some boot warning from _omap_mux_get_by_name
if pin is requested for availability is not present while dynamically probing
the uart pins availability such boot warnings can be addressed only when board
files are patched with omap_serial_init_port calls passing the right pads
needed for a given port.
Discussion Threads for reference:
http://www.spinics.net/lists/linux-omap/msg69859.html
http://www.spinics.net/lists/linux-omap/msg68659.html
Cc: Felipe Balbi <balbi@ti.com>
Cc: Kevin Hilman <khilman@ti.com>
Cc: Russ Dill <russ.dill@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Ameya Palande <ameya.palande@ti.com>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
[tony@atomide.com: updated to fix compile when CONFIG_OMAP_MUX is not set]
Signed-off-by: Tony Lindgren <tony@atomide.com>
354 lines
9.5 KiB
C
354 lines
9.5 KiB
C
/*
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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 "mux2420.h"
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#include "mux2430.h"
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#include "mux34xx.h"
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#include "mux44xx.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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/* 44xx specific mux bit defines */
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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(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
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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_CBS 8 /* 547-pin 0.40 0.40 */
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#define OMAP_PACKAGE_CBL 7 /* 547-pin 0.40 0.40 */
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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_PACKAGE_ZAC 2 /* 24xx 447-pin POP */
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#define OMAP_PACKAGE_ZAF 1 /* 2420 447-pin SIP */
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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_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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* OMAP_MUX_GPIO_IN_MODE3: The GPIO is selected in mode3.
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* The default is mode4.
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*/
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#define OMAP_MUX_REG_8BIT (1 << 0)
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#define OMAP_MUX_GPIO_IN_MODE3 (1 << 1)
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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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* @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 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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* @partition: mux partition
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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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