mirror of https://gitee.com/openkylin/linux.git
1078 lines
24 KiB
C
1078 lines
24 KiB
C
/*
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* linux/arch/arm/mach-omap2/mux.c
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*
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* OMAP2, OMAP3 and OMAP4 pin multiplexing configurations
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*
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* Copyright (C) 2004 - 2010 Texas Instruments Inc.
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* Copyright (C) 2003 - 2008 Nokia Corporation
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*
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* Written by Tony Lindgren
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <asm/system.h>
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#include <plat/omap_hwmod.h>
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#include "control.h"
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#include "mux.h"
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#define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
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#define OMAP_MUX_BASE_SZ 0x5ca
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struct omap_mux_entry {
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struct omap_mux mux;
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struct list_head node;
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};
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static LIST_HEAD(mux_partitions);
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static DEFINE_MUTEX(muxmode_mutex);
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struct omap_mux_partition *omap_mux_get(const char *name)
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{
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struct omap_mux_partition *partition;
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list_for_each_entry(partition, &mux_partitions, node) {
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if (!strcmp(name, partition->name))
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return partition;
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}
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return NULL;
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}
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u16 omap_mux_read(struct omap_mux_partition *partition, u16 reg)
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{
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if (partition->flags & OMAP_MUX_REG_8BIT)
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return __raw_readb(partition->base + reg);
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else
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return __raw_readw(partition->base + reg);
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}
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void omap_mux_write(struct omap_mux_partition *partition, u16 val,
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u16 reg)
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{
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if (partition->flags & OMAP_MUX_REG_8BIT)
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__raw_writeb(val, partition->base + reg);
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else
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__raw_writew(val, partition->base + reg);
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}
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void omap_mux_write_array(struct omap_mux_partition *partition,
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struct omap_board_mux *board_mux)
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{
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while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) {
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omap_mux_write(partition, board_mux->value,
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board_mux->reg_offset);
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board_mux++;
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}
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}
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#ifdef CONFIG_OMAP_MUX
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static char *omap_mux_options;
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static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition,
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int gpio, int val)
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{
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struct omap_mux_entry *e;
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struct omap_mux *gpio_mux = NULL;
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u16 old_mode;
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u16 mux_mode;
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int found = 0;
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struct list_head *muxmodes = &partition->muxmodes;
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if (!gpio)
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return -EINVAL;
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list_for_each_entry(e, muxmodes, node) {
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struct omap_mux *m = &e->mux;
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if (gpio == m->gpio) {
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gpio_mux = m;
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found++;
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}
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}
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if (found == 0) {
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pr_err("%s: Could not set gpio%i\n", __func__, gpio);
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return -ENODEV;
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}
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if (found > 1) {
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pr_info("%s: Multiple gpio paths (%d) for gpio%i\n", __func__,
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found, gpio);
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return -EINVAL;
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}
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old_mode = omap_mux_read(partition, gpio_mux->reg_offset);
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mux_mode = val & ~(OMAP_MUX_NR_MODES - 1);
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if (partition->flags & OMAP_MUX_GPIO_IN_MODE3)
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mux_mode |= OMAP_MUX_MODE3;
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else
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mux_mode |= OMAP_MUX_MODE4;
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pr_debug("%s: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", __func__,
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gpio_mux->muxnames[0], gpio, old_mode, mux_mode);
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omap_mux_write(partition, mux_mode, gpio_mux->reg_offset);
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return 0;
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}
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int __init omap_mux_init_gpio(int gpio, int val)
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{
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struct omap_mux_partition *partition;
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int ret;
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list_for_each_entry(partition, &mux_partitions, node) {
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ret = _omap_mux_init_gpio(partition, gpio, val);
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if (!ret)
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return ret;
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}
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return -ENODEV;
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}
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static int __init _omap_mux_get_by_name(struct omap_mux_partition *partition,
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const char *muxname,
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struct omap_mux **found_mux)
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{
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struct omap_mux *mux = NULL;
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struct omap_mux_entry *e;
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const char *mode_name;
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int found = 0, found_mode = 0, mode0_len = 0;
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struct list_head *muxmodes = &partition->muxmodes;
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mode_name = strchr(muxname, '.');
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if (mode_name) {
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mode0_len = strlen(muxname) - strlen(mode_name);
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mode_name++;
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} else {
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mode_name = muxname;
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}
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list_for_each_entry(e, muxmodes, node) {
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char *m0_entry;
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int i;
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mux = &e->mux;
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m0_entry = mux->muxnames[0];
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/* First check for full name in mode0.muxmode format */
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if (mode0_len && strncmp(muxname, m0_entry, mode0_len))
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continue;
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/* Then check for muxmode only */
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for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
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char *mode_cur = mux->muxnames[i];
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if (!mode_cur)
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continue;
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if (!strcmp(mode_name, mode_cur)) {
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*found_mux = mux;
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found++;
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found_mode = i;
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}
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}
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}
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if (found == 1) {
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return found_mode;
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}
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if (found > 1) {
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pr_err("%s: Multiple signal paths (%i) for %s\n", __func__,
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found, muxname);
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return -EINVAL;
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}
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pr_err("%s: Could not find signal %s\n", __func__, muxname);
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return -ENODEV;
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}
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static int __init
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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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struct omap_mux_partition *partition;
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list_for_each_entry(partition, &mux_partitions, node) {
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struct omap_mux *mux = NULL;
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int mux_mode = _omap_mux_get_by_name(partition, muxname, &mux);
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if (mux_mode < 0)
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continue;
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*found_partition = partition;
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*found_mux = mux;
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return mux_mode;
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}
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return -ENODEV;
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}
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int __init omap_mux_init_signal(const char *muxname, int val)
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{
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struct omap_mux_partition *partition = NULL;
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struct omap_mux *mux = NULL;
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u16 old_mode;
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int mux_mode;
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mux_mode = omap_mux_get_by_name(muxname, &partition, &mux);
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if (mux_mode < 0)
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return mux_mode;
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old_mode = omap_mux_read(partition, mux->reg_offset);
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mux_mode |= val;
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pr_debug("%s: Setting signal %s 0x%04x -> 0x%04x\n",
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__func__, muxname, old_mode, mux_mode);
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omap_mux_write(partition, mux_mode, mux->reg_offset);
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return 0;
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}
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struct omap_hwmod_mux_info * __init
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omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
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{
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struct omap_hwmod_mux_info *hmux;
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int i, nr_pads_dynamic = 0;
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if (!bpads || nr_pads < 1)
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return NULL;
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hmux = kzalloc(sizeof(struct omap_hwmod_mux_info), GFP_KERNEL);
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if (!hmux)
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goto err1;
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hmux->nr_pads = nr_pads;
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hmux->pads = kzalloc(sizeof(struct omap_device_pad) *
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nr_pads, GFP_KERNEL);
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if (!hmux->pads)
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goto err2;
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for (i = 0; i < hmux->nr_pads; i++) {
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struct omap_mux_partition *partition;
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struct omap_device_pad *bpad = &bpads[i], *pad = &hmux->pads[i];
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struct omap_mux *mux;
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int mux_mode;
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mux_mode = omap_mux_get_by_name(bpad->name, &partition, &mux);
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if (mux_mode < 0)
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goto err3;
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if (!pad->partition)
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pad->partition = partition;
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if (!pad->mux)
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pad->mux = mux;
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pad->name = kzalloc(strlen(bpad->name) + 1, GFP_KERNEL);
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if (!pad->name) {
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int j;
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for (j = i - 1; j >= 0; j--)
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kfree(hmux->pads[j].name);
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goto err3;
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}
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strcpy(pad->name, bpad->name);
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pad->flags = bpad->flags;
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pad->enable = bpad->enable;
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pad->idle = bpad->idle;
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pad->off = bpad->off;
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if (pad->flags & OMAP_DEVICE_PAD_REMUX)
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nr_pads_dynamic++;
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pr_debug("%s: Initialized %s\n", __func__, pad->name);
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}
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if (!nr_pads_dynamic)
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return hmux;
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/*
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* Add pads that need dynamic muxing into a separate list
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*/
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hmux->nr_pads_dynamic = nr_pads_dynamic;
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hmux->pads_dynamic = kzalloc(sizeof(struct omap_device_pad *) *
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nr_pads_dynamic, GFP_KERNEL);
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if (!hmux->pads_dynamic) {
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pr_err("%s: Could not allocate dynamic pads\n", __func__);
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return hmux;
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}
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nr_pads_dynamic = 0;
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for (i = 0; i < hmux->nr_pads; i++) {
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struct omap_device_pad *pad = &hmux->pads[i];
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if (pad->flags & OMAP_DEVICE_PAD_REMUX) {
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pr_debug("%s: pad %s tagged dynamic\n",
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__func__, pad->name);
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hmux->pads_dynamic[nr_pads_dynamic] = pad;
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nr_pads_dynamic++;
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}
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}
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return hmux;
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err3:
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kfree(hmux->pads);
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err2:
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kfree(hmux);
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err1:
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pr_err("%s: Could not allocate device mux entry\n", __func__);
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return NULL;
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}
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/* Assumes the calling function takes care of locking */
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void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
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{
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int i;
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/* Runtime idling of dynamic pads */
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if (state == _HWMOD_STATE_IDLE && hmux->enabled) {
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for (i = 0; i < hmux->nr_pads_dynamic; i++) {
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struct omap_device_pad *pad = hmux->pads_dynamic[i];
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int val = -EINVAL;
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val = pad->idle;
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omap_mux_write(pad->partition, val,
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pad->mux->reg_offset);
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}
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return;
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}
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/* Runtime enabling of dynamic pads */
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if ((state == _HWMOD_STATE_ENABLED) && hmux->pads_dynamic
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&& hmux->enabled) {
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for (i = 0; i < hmux->nr_pads_dynamic; i++) {
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struct omap_device_pad *pad = hmux->pads_dynamic[i];
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int val = -EINVAL;
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val = pad->enable;
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omap_mux_write(pad->partition, val,
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pad->mux->reg_offset);
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}
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return;
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}
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/* Enabling or disabling of all pads */
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for (i = 0; i < hmux->nr_pads; i++) {
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struct omap_device_pad *pad = &hmux->pads[i];
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int flags, val = -EINVAL;
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flags = pad->flags;
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switch (state) {
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case _HWMOD_STATE_ENABLED:
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val = pad->enable;
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pr_debug("%s: Enabling %s %x\n", __func__,
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pad->name, val);
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break;
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case _HWMOD_STATE_DISABLED:
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/* Use safe mode unless OMAP_DEVICE_PAD_REMUX */
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if (flags & OMAP_DEVICE_PAD_REMUX)
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val = pad->off;
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else
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val = OMAP_MUX_MODE7;
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pr_debug("%s: Disabling %s %x\n", __func__,
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pad->name, val);
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break;
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default:
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/* Nothing to be done */
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break;
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};
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if (val >= 0) {
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omap_mux_write(pad->partition, val,
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pad->mux->reg_offset);
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pad->flags = flags;
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}
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}
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if (state == _HWMOD_STATE_ENABLED)
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hmux->enabled = true;
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else
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hmux->enabled = false;
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}
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#ifdef CONFIG_DEBUG_FS
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#define OMAP_MUX_MAX_NR_FLAGS 10
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#define OMAP_MUX_TEST_FLAG(val, mask) \
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if (((val) & (mask)) == (mask)) { \
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i++; \
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flags[i] = #mask; \
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}
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/* REVISIT: Add checking for non-optimal mux settings */
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static inline void omap_mux_decode(struct seq_file *s, u16 val)
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{
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char *flags[OMAP_MUX_MAX_NR_FLAGS];
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char mode[sizeof("OMAP_MUX_MODE") + 1];
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int i = -1;
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sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7);
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i++;
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flags[i] = mode;
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OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE);
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if (val & OMAP_OFF_EN) {
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if (!(val & OMAP_OFFOUT_EN)) {
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if (!(val & OMAP_OFF_PULL_UP)) {
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OMAP_MUX_TEST_FLAG(val,
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OMAP_PIN_OFF_INPUT_PULLDOWN);
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} else {
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OMAP_MUX_TEST_FLAG(val,
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OMAP_PIN_OFF_INPUT_PULLUP);
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}
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} else {
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if (!(val & OMAP_OFFOUT_VAL)) {
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OMAP_MUX_TEST_FLAG(val,
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OMAP_PIN_OFF_OUTPUT_LOW);
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} else {
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OMAP_MUX_TEST_FLAG(val,
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OMAP_PIN_OFF_OUTPUT_HIGH);
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}
|
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}
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}
|
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|
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if (val & OMAP_INPUT_EN) {
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if (val & OMAP_PULL_ENA) {
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if (!(val & OMAP_PULL_UP)) {
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OMAP_MUX_TEST_FLAG(val,
|
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OMAP_PIN_INPUT_PULLDOWN);
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} else {
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OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP);
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}
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} else {
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OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT);
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}
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} else {
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i++;
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flags[i] = "OMAP_PIN_OUTPUT";
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}
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do {
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seq_printf(s, "%s", flags[i]);
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if (i > 0)
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seq_printf(s, " | ");
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} while (i-- > 0);
|
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}
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|
|
#define OMAP_MUX_DEFNAME_LEN 32
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|
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static int omap_mux_dbg_board_show(struct seq_file *s, void *unused)
|
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{
|
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struct omap_mux_partition *partition = s->private;
|
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struct omap_mux_entry *e;
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u8 omap_gen = omap_rev() >> 28;
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list_for_each_entry(e, &partition->muxmodes, node) {
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struct omap_mux *m = &e->mux;
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char m0_def[OMAP_MUX_DEFNAME_LEN];
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char *m0_name = m->muxnames[0];
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u16 val;
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int i, mode;
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|
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if (!m0_name)
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continue;
|
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|
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/* REVISIT: Needs to be updated if mode0 names get longer */
|
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for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) {
|
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if (m0_name[i] == '\0') {
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m0_def[i] = m0_name[i];
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break;
|
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}
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m0_def[i] = toupper(m0_name[i]);
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}
|
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val = omap_mux_read(partition, m->reg_offset);
|
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mode = val & OMAP_MUX_MODE7;
|
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if (mode != 0)
|
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seq_printf(s, "/* %s */\n", m->muxnames[mode]);
|
|
|
|
/*
|
|
* XXX: Might be revisited to support differences across
|
|
* same OMAP generation.
|
|
*/
|
|
seq_printf(s, "OMAP%d_MUX(%s, ", omap_gen, m0_def);
|
|
omap_mux_decode(s, val);
|
|
seq_printf(s, "),\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_mux_dbg_board_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, omap_mux_dbg_board_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations omap_mux_dbg_board_fops = {
|
|
.open = omap_mux_dbg_board_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static struct omap_mux_partition *omap_mux_get_partition(struct omap_mux *mux)
|
|
{
|
|
struct omap_mux_partition *partition;
|
|
|
|
list_for_each_entry(partition, &mux_partitions, node) {
|
|
struct list_head *muxmodes = &partition->muxmodes;
|
|
struct omap_mux_entry *e;
|
|
|
|
list_for_each_entry(e, muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
|
|
if (m == mux)
|
|
return partition;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused)
|
|
{
|
|
struct omap_mux *m = s->private;
|
|
struct omap_mux_partition *partition;
|
|
const char *none = "NA";
|
|
u16 val;
|
|
int mode;
|
|
|
|
partition = omap_mux_get_partition(m);
|
|
if (!partition)
|
|
return 0;
|
|
|
|
val = omap_mux_read(partition, m->reg_offset);
|
|
mode = val & OMAP_MUX_MODE7;
|
|
|
|
seq_printf(s, "name: %s.%s (0x%08x/0x%03x = 0x%04x), b %s, t %s\n",
|
|
m->muxnames[0], m->muxnames[mode],
|
|
partition->phys + m->reg_offset, m->reg_offset, val,
|
|
m->balls[0] ? m->balls[0] : none,
|
|
m->balls[1] ? m->balls[1] : none);
|
|
seq_printf(s, "mode: ");
|
|
omap_mux_decode(s, val);
|
|
seq_printf(s, "\n");
|
|
seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n",
|
|
m->muxnames[0] ? m->muxnames[0] : none,
|
|
m->muxnames[1] ? m->muxnames[1] : none,
|
|
m->muxnames[2] ? m->muxnames[2] : none,
|
|
m->muxnames[3] ? m->muxnames[3] : none,
|
|
m->muxnames[4] ? m->muxnames[4] : none,
|
|
m->muxnames[5] ? m->muxnames[5] : none,
|
|
m->muxnames[6] ? m->muxnames[6] : none,
|
|
m->muxnames[7] ? m->muxnames[7] : none);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OMAP_MUX_MAX_ARG_CHAR 7
|
|
|
|
static ssize_t omap_mux_dbg_signal_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
char buf[OMAP_MUX_MAX_ARG_CHAR];
|
|
struct seq_file *seqf;
|
|
struct omap_mux *m;
|
|
unsigned long val;
|
|
int buf_size, ret;
|
|
struct omap_mux_partition *partition;
|
|
|
|
if (count > OMAP_MUX_MAX_ARG_CHAR)
|
|
return -EINVAL;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
buf_size = min(count, sizeof(buf) - 1);
|
|
|
|
if (copy_from_user(buf, user_buf, buf_size))
|
|
return -EFAULT;
|
|
|
|
ret = strict_strtoul(buf, 0x10, &val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (val > 0xffff)
|
|
return -EINVAL;
|
|
|
|
seqf = file->private_data;
|
|
m = seqf->private;
|
|
|
|
partition = omap_mux_get_partition(m);
|
|
if (!partition)
|
|
return -ENODEV;
|
|
|
|
omap_mux_write(partition, (u16)val, m->reg_offset);
|
|
*ppos += count;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, omap_mux_dbg_signal_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations omap_mux_dbg_signal_fops = {
|
|
.open = omap_mux_dbg_signal_open,
|
|
.read = seq_read,
|
|
.write = omap_mux_dbg_signal_write,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static struct dentry *mux_dbg_dir;
|
|
|
|
static void __init omap_mux_dbg_create_entry(
|
|
struct omap_mux_partition *partition,
|
|
struct dentry *mux_dbg_dir)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
|
|
list_for_each_entry(e, &partition->muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
|
|
(void)debugfs_create_file(m->muxnames[0], S_IWUSR, mux_dbg_dir,
|
|
m, &omap_mux_dbg_signal_fops);
|
|
}
|
|
}
|
|
|
|
static void __init omap_mux_dbg_init(void)
|
|
{
|
|
struct omap_mux_partition *partition;
|
|
static struct dentry *mux_dbg_board_dir;
|
|
|
|
mux_dbg_dir = debugfs_create_dir("omap_mux", NULL);
|
|
if (!mux_dbg_dir)
|
|
return;
|
|
|
|
mux_dbg_board_dir = debugfs_create_dir("board", mux_dbg_dir);
|
|
if (!mux_dbg_board_dir)
|
|
return;
|
|
|
|
list_for_each_entry(partition, &mux_partitions, node) {
|
|
omap_mux_dbg_create_entry(partition, mux_dbg_dir);
|
|
(void)debugfs_create_file(partition->name, S_IRUGO,
|
|
mux_dbg_board_dir, partition,
|
|
&omap_mux_dbg_board_fops);
|
|
}
|
|
}
|
|
|
|
#else
|
|
static inline void omap_mux_dbg_init(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
static void __init omap_mux_free_names(struct omap_mux *m)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < OMAP_MUX_NR_MODES; i++)
|
|
kfree(m->muxnames[i]);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
for (i = 0; i < OMAP_MUX_NR_SIDES; i++)
|
|
kfree(m->balls[i]);
|
|
#endif
|
|
|
|
}
|
|
|
|
/* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */
|
|
static int __init omap_mux_late_init(void)
|
|
{
|
|
struct omap_mux_partition *partition;
|
|
|
|
list_for_each_entry(partition, &mux_partitions, node) {
|
|
struct omap_mux_entry *e, *tmp;
|
|
list_for_each_entry_safe(e, tmp, &partition->muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
u16 mode = omap_mux_read(partition, m->reg_offset);
|
|
|
|
if (OMAP_MODE_GPIO(mode))
|
|
continue;
|
|
|
|
#ifndef CONFIG_DEBUG_FS
|
|
mutex_lock(&muxmode_mutex);
|
|
list_del(&e->node);
|
|
mutex_unlock(&muxmode_mutex);
|
|
omap_mux_free_names(m);
|
|
kfree(m);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
omap_mux_dbg_init();
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(omap_mux_late_init);
|
|
|
|
static void __init omap_mux_package_fixup(struct omap_mux *p,
|
|
struct omap_mux *superset)
|
|
{
|
|
while (p->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
struct omap_mux *s = superset;
|
|
int found = 0;
|
|
|
|
while (s->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
if (s->reg_offset == p->reg_offset) {
|
|
*s = *p;
|
|
found++;
|
|
break;
|
|
}
|
|
s++;
|
|
}
|
|
if (!found)
|
|
pr_err("%s: Unknown entry offset 0x%x\n", __func__,
|
|
p->reg_offset);
|
|
p++;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
static void __init omap_mux_package_init_balls(struct omap_ball *b,
|
|
struct omap_mux *superset)
|
|
{
|
|
while (b->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
struct omap_mux *s = superset;
|
|
int found = 0;
|
|
|
|
while (s->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
if (s->reg_offset == b->reg_offset) {
|
|
s->balls[0] = b->balls[0];
|
|
s->balls[1] = b->balls[1];
|
|
found++;
|
|
break;
|
|
}
|
|
s++;
|
|
}
|
|
if (!found)
|
|
pr_err("%s: Unknown ball offset 0x%x\n", __func__,
|
|
b->reg_offset);
|
|
b++;
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_DEBUG_FS */
|
|
|
|
static inline void omap_mux_package_init_balls(struct omap_ball *b,
|
|
struct omap_mux *superset)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
static int __init omap_mux_setup(char *options)
|
|
{
|
|
if (!options)
|
|
return 0;
|
|
|
|
omap_mux_options = options;
|
|
|
|
return 1;
|
|
}
|
|
__setup("omap_mux=", omap_mux_setup);
|
|
|
|
/*
|
|
* Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234
|
|
* cmdline options only override the bootloader values.
|
|
* During development, please enable CONFIG_DEBUG_FS, and use the
|
|
* signal specific entries under debugfs.
|
|
*/
|
|
static void __init omap_mux_set_cmdline_signals(void)
|
|
{
|
|
char *options, *next_opt, *token;
|
|
|
|
if (!omap_mux_options)
|
|
return;
|
|
|
|
options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL);
|
|
if (!options)
|
|
return;
|
|
|
|
strcpy(options, omap_mux_options);
|
|
next_opt = options;
|
|
|
|
while ((token = strsep(&next_opt, ",")) != NULL) {
|
|
char *keyval, *name;
|
|
unsigned long val;
|
|
|
|
keyval = token;
|
|
name = strsep(&keyval, "=");
|
|
if (name) {
|
|
int res;
|
|
|
|
res = strict_strtoul(keyval, 0x10, &val);
|
|
if (res < 0)
|
|
continue;
|
|
|
|
omap_mux_init_signal(name, (u16)val);
|
|
}
|
|
}
|
|
|
|
kfree(options);
|
|
}
|
|
|
|
static int __init omap_mux_copy_names(struct omap_mux *src,
|
|
struct omap_mux *dst)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
|
|
if (src->muxnames[i]) {
|
|
dst->muxnames[i] =
|
|
kmalloc(strlen(src->muxnames[i]) + 1,
|
|
GFP_KERNEL);
|
|
if (!dst->muxnames[i])
|
|
goto free;
|
|
strcpy(dst->muxnames[i], src->muxnames[i]);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
for (i = 0; i < OMAP_MUX_NR_SIDES; i++) {
|
|
if (src->balls[i]) {
|
|
dst->balls[i] =
|
|
kmalloc(strlen(src->balls[i]) + 1,
|
|
GFP_KERNEL);
|
|
if (!dst->balls[i])
|
|
goto free;
|
|
strcpy(dst->balls[i], src->balls[i]);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
free:
|
|
omap_mux_free_names(dst);
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_OMAP_MUX */
|
|
|
|
static struct omap_mux *omap_mux_get_by_gpio(
|
|
struct omap_mux_partition *partition,
|
|
int gpio)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
struct omap_mux *ret = NULL;
|
|
|
|
list_for_each_entry(e, &partition->muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
if (m->gpio == gpio) {
|
|
ret = m;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Needed for dynamic muxing of GPIO pins for off-idle */
|
|
u16 omap_mux_get_gpio(int gpio)
|
|
{
|
|
struct omap_mux_partition *partition;
|
|
struct omap_mux *m;
|
|
|
|
list_for_each_entry(partition, &mux_partitions, node) {
|
|
m = omap_mux_get_by_gpio(partition, gpio);
|
|
if (m)
|
|
return omap_mux_read(partition, m->reg_offset);
|
|
}
|
|
|
|
if (!m || m->reg_offset == OMAP_MUX_TERMINATOR)
|
|
pr_err("%s: Could not get gpio%i\n", __func__, gpio);
|
|
|
|
return OMAP_MUX_TERMINATOR;
|
|
}
|
|
|
|
/* Needed for dynamic muxing of GPIO pins for off-idle */
|
|
void omap_mux_set_gpio(u16 val, int gpio)
|
|
{
|
|
struct omap_mux_partition *partition;
|
|
struct omap_mux *m = NULL;
|
|
|
|
list_for_each_entry(partition, &mux_partitions, node) {
|
|
m = omap_mux_get_by_gpio(partition, gpio);
|
|
if (m) {
|
|
omap_mux_write(partition, val, m->reg_offset);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (!m || m->reg_offset == OMAP_MUX_TERMINATOR)
|
|
pr_err("%s: Could not set gpio%i\n", __func__, gpio);
|
|
}
|
|
|
|
static struct omap_mux * __init omap_mux_list_add(
|
|
struct omap_mux_partition *partition,
|
|
struct omap_mux *src)
|
|
{
|
|
struct omap_mux_entry *entry;
|
|
struct omap_mux *m;
|
|
|
|
entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL);
|
|
if (!entry)
|
|
return NULL;
|
|
|
|
m = &entry->mux;
|
|
entry->mux = *src;
|
|
|
|
#ifdef CONFIG_OMAP_MUX
|
|
if (omap_mux_copy_names(src, m)) {
|
|
kfree(entry);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
mutex_lock(&muxmode_mutex);
|
|
list_add_tail(&entry->node, &partition->muxmodes);
|
|
mutex_unlock(&muxmode_mutex);
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Note if CONFIG_OMAP_MUX is not selected, we will only initialize
|
|
* the GPIO to mux offset mapping that is needed for dynamic muxing
|
|
* of GPIO pins for off-idle.
|
|
*/
|
|
static void __init omap_mux_init_list(struct omap_mux_partition *partition,
|
|
struct omap_mux *superset)
|
|
{
|
|
while (superset->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
struct omap_mux *entry;
|
|
|
|
#ifdef CONFIG_OMAP_MUX
|
|
if (!superset->muxnames || !superset->muxnames[0]) {
|
|
superset++;
|
|
continue;
|
|
}
|
|
#else
|
|
/* Skip pins that are not muxed as GPIO by bootloader */
|
|
if (!OMAP_MODE_GPIO(omap_mux_read(partition,
|
|
superset->reg_offset))) {
|
|
superset++;
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
entry = omap_mux_list_add(partition, superset);
|
|
if (!entry) {
|
|
pr_err("%s: Could not add entry\n", __func__);
|
|
return;
|
|
}
|
|
superset++;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_OMAP_MUX
|
|
|
|
static void omap_mux_init_package(struct omap_mux *superset,
|
|
struct omap_mux *package_subset,
|
|
struct omap_ball *package_balls)
|
|
{
|
|
if (package_subset)
|
|
omap_mux_package_fixup(package_subset, superset);
|
|
if (package_balls)
|
|
omap_mux_package_init_balls(package_balls, superset);
|
|
}
|
|
|
|
static void omap_mux_init_signals(struct omap_mux_partition *partition,
|
|
struct omap_board_mux *board_mux)
|
|
{
|
|
omap_mux_set_cmdline_signals();
|
|
omap_mux_write_array(partition, board_mux);
|
|
}
|
|
|
|
#else
|
|
|
|
static void omap_mux_init_package(struct omap_mux *superset,
|
|
struct omap_mux *package_subset,
|
|
struct omap_ball *package_balls)
|
|
{
|
|
}
|
|
|
|
static void omap_mux_init_signals(struct omap_mux_partition *partition,
|
|
struct omap_board_mux *board_mux)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
static u32 mux_partitions_cnt;
|
|
|
|
int __init omap_mux_init(const char *name, u32 flags,
|
|
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)
|
|
{
|
|
struct omap_mux_partition *partition;
|
|
|
|
partition = kzalloc(sizeof(struct omap_mux_partition), GFP_KERNEL);
|
|
if (!partition)
|
|
return -ENOMEM;
|
|
|
|
partition->name = name;
|
|
partition->flags = flags;
|
|
partition->size = mux_size;
|
|
partition->phys = mux_pbase;
|
|
partition->base = ioremap(mux_pbase, mux_size);
|
|
if (!partition->base) {
|
|
pr_err("%s: Could not ioremap mux partition at 0x%08x\n",
|
|
__func__, partition->phys);
|
|
kfree(partition);
|
|
return -ENODEV;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&partition->muxmodes);
|
|
|
|
list_add_tail(&partition->node, &mux_partitions);
|
|
mux_partitions_cnt++;
|
|
pr_info("%s: Add partition: #%d: %s, flags: %x\n", __func__,
|
|
mux_partitions_cnt, partition->name, partition->flags);
|
|
|
|
omap_mux_init_package(superset, package_subset, package_balls);
|
|
omap_mux_init_list(partition, superset);
|
|
omap_mux_init_signals(partition, board_mux);
|
|
|
|
return 0;
|
|
}
|
|
|