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@@ -0,0 +1,151 @@
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+/*
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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 <linux/irq.h>
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+#include <linux/interrupt.h>
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+
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+
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+#include "omap_hwmod.h"
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+
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+#include "soc.h"
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+#include "control.h"
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+#include "mux.h"
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+#include "prm.h"
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+#include "common.h"
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+
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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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+
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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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+
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+static LIST_HEAD(mux_partitions);
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+static DEFINE_MUTEX(muxmode_mutex);
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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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+ struct omap_mux_partition *partition;
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+
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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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+
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+ return NULL;
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+}
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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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+
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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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+
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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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+ if (!board_mux)
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+ return;
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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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+
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+#ifdef CONFIG_OMAP_MUX
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+
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+static char *omap_mux_options;
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+
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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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+
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+ if (!gpio)
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+ return -EINVAL;
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+
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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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+
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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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+
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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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+
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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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+ mux_mode |= partition->gpio;
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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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+
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+ return 0;
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+}
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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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+
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+ list_for_each_entry(partition, &mux_partitions, node) {
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