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Diffstat (limited to 'arch/arm/mach-omap2/mux.c')
-rw-r--r--arch/arm/mach-omap2/mux.c1153
1 files changed, 0 insertions, 1153 deletions
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
deleted file mode 100644
index e1fa39e1ecf8..000000000000
--- a/arch/arm/mach-omap2/mux.c
+++ /dev/null
@@ -1,1153 +0,0 @@
-/*
- * linux/arch/arm/mach-omap2/mux.c
- *
- * OMAP2, OMAP3 and OMAP4 pin multiplexing configurations
- *
- * Copyright (C) 2004 - 2010 Texas Instruments Inc.
- * Copyright (C) 2003 - 2008 Nokia Corporation
- *
- * Written by Tony Lindgren
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/ctype.h>
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-#include <linux/uaccess.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-
-
-#include "omap_hwmod.h"
-
-#include "soc.h"
-#include "control.h"
-#include "mux.h"
-#include "prm.h"
-#include "common.h"
-
-#define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
-#define OMAP_MUX_BASE_SZ 0x5ca
-
-struct omap_mux_entry {
- struct omap_mux mux;
- struct list_head node;
-};
-
-static LIST_HEAD(mux_partitions);
-static DEFINE_MUTEX(muxmode_mutex);
-
-struct omap_mux_partition *omap_mux_get(const char *name)
-{
- struct omap_mux_partition *partition;
-
- list_for_each_entry(partition, &mux_partitions, node) {
- if (!strcmp(name, partition->name))
- return partition;
- }
-
- return NULL;
-}
-
-u16 omap_mux_read(struct omap_mux_partition *partition, u16 reg)
-{
- if (partition->flags & OMAP_MUX_REG_8BIT)
- return readb_relaxed(partition->base + reg);
- else
- return readw_relaxed(partition->base + reg);
-}
-
-void omap_mux_write(struct omap_mux_partition *partition, u16 val,
- u16 reg)
-{
- if (partition->flags & OMAP_MUX_REG_8BIT)
- writeb_relaxed(val, partition->base + reg);
- else
- writew_relaxed(val, partition->base + reg);
-}
-
-void omap_mux_write_array(struct omap_mux_partition *partition,
- struct omap_board_mux *board_mux)
-{
- if (!board_mux)
- return;
-
- while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) {
- omap_mux_write(partition, board_mux->value,
- board_mux->reg_offset);
- board_mux++;
- }
-}
-
-#ifdef CONFIG_OMAP_MUX
-
-static char *omap_mux_options;
-
-static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition,
- int gpio, int val)
-{
- struct omap_mux_entry *e;
- struct omap_mux *gpio_mux = NULL;
- u16 old_mode;
- u16 mux_mode;
- int found = 0;
- struct list_head *muxmodes = &partition->muxmodes;
-
- if (!gpio)
- return -EINVAL;
-
- list_for_each_entry(e, muxmodes, node) {
- struct omap_mux *m = &e->mux;
- if (gpio == m->gpio) {
- gpio_mux = m;
- found++;
- }
- }
-
- if (found == 0) {
- pr_err("%s: Could not set gpio%i\n", __func__, gpio);
- return -ENODEV;
- }
-
- if (found > 1) {
- pr_info("%s: Multiple gpio paths (%d) for gpio%i\n", __func__,
- found, gpio);
- return -EINVAL;
- }
-
- old_mode = omap_mux_read(partition, gpio_mux->reg_offset);
- mux_mode = val & ~(OMAP_MUX_NR_MODES - 1);
- mux_mode |= partition->gpio;
- pr_debug("%s: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", __func__,
- gpio_mux->muxnames[0], gpio, old_mode, mux_mode);
- omap_mux_write(partition, mux_mode, gpio_mux->reg_offset);
-
- return 0;
-}
-
-int __init omap_mux_init_gpio(int gpio, int val)
-{
- struct omap_mux_partition *partition;
- int ret;
-
- list_for_each_entry(partition, &mux_partitions, node) {
- ret = _omap_mux_init_gpio(partition, gpio, val);
- if (!ret)
- return ret;
- }
-
- return -ENODEV;
-}
-
-static int __init _omap_mux_get_by_name(struct omap_mux_partition *partition,
- const char *muxname,
- struct omap_mux **found_mux)
-{
- struct omap_mux *mux = NULL;
- struct omap_mux_entry *e;
- const char *mode_name;
- int found = 0, found_mode = 0, mode0_len = 0;
- struct list_head *muxmodes = &partition->muxmodes;
-
- mode_name = strchr(muxname, '.');
- if (mode_name) {
- mode0_len = strlen(muxname) - strlen(mode_name);
- mode_name++;
- } else {
- mode_name = muxname;
- }
-
- list_for_each_entry(e, muxmodes, node) {
- char *m0_entry;
- int i;
-
- mux = &e->mux;
- m0_entry = mux->muxnames[0];
-
- /* First check for full name in mode0.muxmode format */
- if (mode0_len)
- if (strncmp(muxname, m0_entry, mode0_len) ||
- (strlen(m0_entry) != mode0_len))
- continue;
-
- /* Then check for muxmode only */
- for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
- char *mode_cur = mux->muxnames[i];
-
- if (!mode_cur)
- continue;
-
- if (!strcmp(mode_name, mode_cur)) {
- *found_mux = mux;
- found++;
- found_mode = i;
- }
- }
- }
-
- if (found == 1) {
- return found_mode;
- }
-
- if (found > 1) {
- pr_err("%s: Multiple signal paths (%i) for %s\n", __func__,
- found, muxname);
- return -EINVAL;
- }
-
- return -ENODEV;
-}
-
-int __init omap_mux_get_by_name(const char *muxname,
- struct omap_mux_partition **found_partition,
- struct omap_mux **found_mux)
-{
- struct omap_mux_partition *partition;
-
- list_for_each_entry(partition, &mux_partitions, node) {
- struct omap_mux *mux = NULL;
- int mux_mode = _omap_mux_get_by_name(partition, muxname, &mux);
- if (mux_mode < 0)
- continue;
-
- *found_partition = partition;
- *found_mux = mux;
-
- return mux_mode;
- }
-
- pr_err("%s: Could not find signal %s\n", __func__, muxname);
-
- return -ENODEV;
-}
-
-int __init omap_mux_init_signal(const char *muxname, int val)
-{
- struct omap_mux_partition *partition = NULL;
- struct omap_mux *mux = NULL;
- u16 old_mode;
- int mux_mode;
-
- mux_mode = omap_mux_get_by_name(muxname, &partition, &mux);
- if (mux_mode < 0 || !mux)
- return mux_mode;
-
- old_mode = omap_mux_read(partition, mux->reg_offset);
- mux_mode |= val;
- pr_debug("%s: Setting signal %s 0x%04x -> 0x%04x\n",
- __func__, muxname, old_mode, mux_mode);
- omap_mux_write(partition, mux_mode, mux->reg_offset);
-
- return 0;
-}
-
-struct omap_hwmod_mux_info * __init
-omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
-{
- struct omap_hwmod_mux_info *hmux;
- int i, nr_pads_dynamic = 0;
-
- if (!bpads || nr_pads < 1)
- return NULL;
-
- hmux = kzalloc(sizeof(struct omap_hwmod_mux_info), GFP_KERNEL);
- if (!hmux)
- goto err1;
-
- hmux->nr_pads = nr_pads;
-
- hmux->pads = kzalloc(sizeof(struct omap_device_pad) *
- nr_pads, GFP_KERNEL);
- if (!hmux->pads)
- goto err2;
-
- for (i = 0; i < hmux->nr_pads; i++) {
- struct omap_mux_partition *partition;
- struct omap_device_pad *bpad = &bpads[i], *pad = &hmux->pads[i];
- struct omap_mux *mux;
- int mux_mode;
-
- mux_mode = omap_mux_get_by_name(bpad->name, &partition, &mux);
- if (mux_mode < 0)
- goto err3;
- if (!pad->partition)
- pad->partition = partition;
- if (!pad->mux)
- pad->mux = mux;
-
- pad->name = kzalloc(strlen(bpad->name) + 1, GFP_KERNEL);
- if (!pad->name) {
- int j;
-
- for (j = i - 1; j >= 0; j--)
- kfree(hmux->pads[j].name);
- goto err3;
- }
- strcpy(pad->name, bpad->name);
-
- pad->flags = bpad->flags;
- pad->enable = bpad->enable;
- pad->idle = bpad->idle;
- pad->off = bpad->off;
-
- if (pad->flags &
- (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP))
- nr_pads_dynamic++;
-
- pr_debug("%s: Initialized %s\n", __func__, pad->name);
- }
-
- if (!nr_pads_dynamic)
- return hmux;
-
- /*
- * Add pads that need dynamic muxing into a separate list
- */
-
- hmux->nr_pads_dynamic = nr_pads_dynamic;
- hmux->pads_dynamic = kzalloc(sizeof(struct omap_device_pad *) *
- nr_pads_dynamic, GFP_KERNEL);
- if (!hmux->pads_dynamic) {
- pr_err("%s: Could not allocate dynamic pads\n", __func__);
- return hmux;
- }
-
- nr_pads_dynamic = 0;
- for (i = 0; i < hmux->nr_pads; i++) {
- struct omap_device_pad *pad = &hmux->pads[i];
-
- if (pad->flags &
- (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP)) {
- pr_debug("%s: pad %s tagged dynamic\n",
- __func__, pad->name);
- hmux->pads_dynamic[nr_pads_dynamic] = pad;
- nr_pads_dynamic++;
- }
- }
-
- return hmux;
-
-err3:
- kfree(hmux->pads);
-err2:
- kfree(hmux);
-err1:
- pr_err("%s: Could not allocate device mux entry\n", __func__);
-
- return NULL;
-}
-
-/**
- * omap_hwmod_mux_scan_wakeups - omap hwmod scan wakeup pads
- * @hmux: Pads for a hwmod
- * @mpu_irqs: MPU irq array for a hwmod
- *
- * Scans the wakeup status of pads for a single hwmod. If an irq
- * array is defined for this mux, the parser will call the registered
- * ISRs for corresponding pads, otherwise the parser will stop at the
- * first wakeup active pad and return. Returns true if there is a
- * pending and non-served wakeup event for the mux, otherwise false.
- */
-static bool omap_hwmod_mux_scan_wakeups(struct omap_hwmod_mux_info *hmux,
- struct omap_hwmod_irq_info *mpu_irqs)
-{
- int i, irq;
- unsigned int val;
- u32 handled_irqs = 0;
-
- for (i = 0; i < hmux->nr_pads_dynamic; i++) {
- struct omap_device_pad *pad = hmux->pads_dynamic[i];
-
- if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP) ||
- !(pad->idle & OMAP_WAKEUP_EN))
- continue;
-
- val = omap_mux_read(pad->partition, pad->mux->reg_offset);
- if (!(val & OMAP_WAKEUP_EVENT))
- continue;
-
- if (!hmux->irqs)
- return true;
-
- irq = hmux->irqs[i];
- /* make sure we only handle each irq once */
- if (handled_irqs & 1 << irq)
- continue;
-
- handled_irqs |= 1 << irq;
-
- generic_handle_irq(mpu_irqs[irq].irq);
- }
-
- return false;
-}
-
-/**
- * _omap_hwmod_mux_handle_irq - Process wakeup events for a single hwmod
- *
- * Checks a single hwmod for every wakeup capable pad to see if there is an
- * active wakeup event. If this is the case, call the corresponding ISR.
- */
-static int _omap_hwmod_mux_handle_irq(struct omap_hwmod *oh, void *data)
-{
- if (!oh->mux || !oh->mux->enabled)
- return 0;
- if (omap_hwmod_mux_scan_wakeups(oh->mux, oh->mpu_irqs))
- generic_handle_irq(oh->mpu_irqs[0].irq);
- return 0;
-}
-
-/**
- * omap_hwmod_mux_handle_irq - Process pad wakeup irqs.
- *
- * Calls a function for each registered omap_hwmod to check
- * pad wakeup statuses.
- */
-static irqreturn_t omap_hwmod_mux_handle_irq(int irq, void *unused)
-{
- omap_hwmod_for_each(_omap_hwmod_mux_handle_irq, NULL);
- return IRQ_HANDLED;
-}
-
-/* Assumes the calling function takes care of locking */
-void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
-{
- int i;
-
- /* Runtime idling of dynamic pads */
- if (state == _HWMOD_STATE_IDLE && hmux->enabled) {
- for (i = 0; i < hmux->nr_pads_dynamic; i++) {
- struct omap_device_pad *pad = hmux->pads_dynamic[i];
- int val = -EINVAL;
-
- val = pad->idle;
- omap_mux_write(pad->partition, val,
- pad->mux->reg_offset);
- }
-
- return;
- }
-
- /* Runtime enabling of dynamic pads */
- if ((state == _HWMOD_STATE_ENABLED) && hmux->pads_dynamic
- && hmux->enabled) {
- for (i = 0; i < hmux->nr_pads_dynamic; i++) {
- struct omap_device_pad *pad = hmux->pads_dynamic[i];
- int val = -EINVAL;
-
- val = pad->enable;
- omap_mux_write(pad->partition, val,
- pad->mux->reg_offset);
- }
-
- return;
- }
-
- /* Enabling or disabling of all pads */
- for (i = 0; i < hmux->nr_pads; i++) {
- struct omap_device_pad *pad = &hmux->pads[i];
- int flags, val = -EINVAL;
-
- flags = pad->flags;
-
- switch (state) {
- case _HWMOD_STATE_ENABLED:
- val = pad->enable;
- pr_debug("%s: Enabling %s %x\n", __func__,
- pad->name, val);
- break;
- case _HWMOD_STATE_DISABLED:
- /* Use safe mode unless OMAP_DEVICE_PAD_REMUX */
- if (flags & OMAP_DEVICE_PAD_REMUX)
- val = pad->off;
- else
- val = OMAP_MUX_MODE7;
- pr_debug("%s: Disabling %s %x\n", __func__,
- pad->name, val);
- break;
- default:
- /* Nothing to be done */
- break;
- }
-
- if (val >= 0) {
- omap_mux_write(pad->partition, val,
- pad->mux->reg_offset);
- pad->flags = flags;
- }
- }
-
- if (state == _HWMOD_STATE_ENABLED)
- hmux->enabled = true;
- else
- hmux->enabled = false;
-}
-
-#ifdef CONFIG_DEBUG_FS
-
-#define OMAP_MUX_MAX_NR_FLAGS 10
-#define OMAP_MUX_TEST_FLAG(val, mask) \
- if (((val) & (mask)) == (mask)) { \
- i++; \
- flags[i] = #mask; \
- }
-
-/* REVISIT: Add checking for non-optimal mux settings */
-static inline void omap_mux_decode(struct seq_file *s, u16 val)
-{
- char *flags[OMAP_MUX_MAX_NR_FLAGS];
- char mode[sizeof("OMAP_MUX_MODE") + 1];
- int i = -1;
-
- sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7);
- i++;
- flags[i] = mode;
-
- OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE);
- if (val & OMAP_OFF_EN) {
- if (!(val & OMAP_OFFOUT_EN)) {
- if (!(val & OMAP_OFF_PULL_UP)) {
- OMAP_MUX_TEST_FLAG(val,
- OMAP_PIN_OFF_INPUT_PULLDOWN);
- } else {
- OMAP_MUX_TEST_FLAG(val,
- OMAP_PIN_OFF_INPUT_PULLUP);
- }
- } else {
- if (!(val & OMAP_OFFOUT_VAL)) {
- OMAP_MUX_TEST_FLAG(val,
- OMAP_PIN_OFF_OUTPUT_LOW);
- } else {
- OMAP_MUX_TEST_FLAG(val,
- OMAP_PIN_OFF_OUTPUT_HIGH);
- }
- }
- }
-
- if (val & OMAP_INPUT_EN) {
- if (val & OMAP_PULL_ENA) {
- if (!(val & OMAP_PULL_UP)) {
- OMAP_MUX_TEST_FLAG(val,
- OMAP_PIN_INPUT_PULLDOWN);
- } else {
- OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP);
- }
- } else {
- OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT);
- }
- } else {
- i++;
- flags[i] = "OMAP_PIN_OUTPUT";
- }
-
- do {
- seq_printf(s, "%s", flags[i]);
- if (i > 0)
- seq_puts(s, " | ");
- } while (i-- > 0);
-}
-
-#define OMAP_MUX_DEFNAME_LEN 32
-
-static int omap_mux_dbg_board_show(struct seq_file *s, void *unused)
-{
- struct omap_mux_partition *partition = s->private;
- struct omap_mux_entry *e;
- u8 omap_gen = omap_rev() >> 28;
-
- list_for_each_entry(e, &partition->muxmodes, node) {
- struct omap_mux *m = &e->mux;
- char m0_def[OMAP_MUX_DEFNAME_LEN];
- char *m0_name = m->muxnames[0];
- u16 val;
- int i, mode;
-
- if (!m0_name)
- continue;
-
- /* REVISIT: Needs to be updated if mode0 names get longer */
- for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) {
- if (m0_name[i] == '\0') {
- m0_def[i] = m0_name[i];
- break;
- }
- m0_def[i] = toupper(m0_name[i]);
- }
- val = omap_mux_read(partition, m->reg_offset);
- mode = val & OMAP_MUX_MODE7;
- if (mode != 0)
- 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_puts(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_puts(s, "mode: ");
- omap_mux_decode(s, val);
- seq_putc(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)
-{
- struct seq_file *seqf;
- struct omap_mux *m;
- u16 val;
- int ret;
- struct omap_mux_partition *partition;
-
- if (count > OMAP_MUX_MAX_ARG_CHAR)
- return -EINVAL;
-
- ret = kstrtou16_from_user(user_buf, count, 0x10, &val);
- if (ret < 0)
- return ret;
-
- seqf = file->private_data;
- m = seqf->private;
-
- partition = omap_mux_get_partition(m);
- if (!partition)
- return -ENODEV;
-
- omap_mux_write(partition, 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 | S_IRUGO,
- 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 */
-int __init omap_mux_late_init(void)
-{
- struct omap_mux_partition *partition;
- int ret;
-
- 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(partition, 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();
-
- /* see pinctrl-single-omap for the wake-up interrupt handling */
- if (of_have_populated_dt())
- return 0;
-
- ret = request_irq(omap_prcm_event_to_irq("io"),
- omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND,
- "hwmod_io", omap_mux_late_init);
-
- if (ret)
- pr_warn("mux: Failed to setup hwmod io irq %d\n", ret);
-
- return 0;
-}
-
-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 = kstrdup(omap_mux_options, GFP_KERNEL);
- if (!options)
- return;
-
- next_opt = options;
-
- while ((token = strsep(&next_opt, ",")) != NULL) {
- char *keyval, *name;
- u16 val;
-
- keyval = token;
- name = strsep(&keyval, "=");
- if (name) {
- int res;
-
- res = kstrtou16(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] = kstrdup(src->muxnames[i],
- GFP_KERNEL);
- if (!dst->muxnames[i])
- goto free;
- }
- }
-
-#ifdef CONFIG_DEBUG_FS
- for (i = 0; i < OMAP_MUX_NR_SIDES; i++) {
- if (src->balls[i]) {
- dst->balls[i] = kstrdup(src->balls[i], GFP_KERNEL);
- if (!dst->balls[i])
- goto free;
- }
- }
-#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 = NULL;
-
- 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[0]) {
- superset++;
- continue;
- }
-#else
- /* Skip pins that are not muxed as GPIO by bootloader */
- if (!OMAP_MODE_GPIO(partition, 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 __init 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 __init 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->gpio = flags & OMAP_MUX_MODE7;
- 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;
-}
-