diff options
Diffstat (limited to 'arch/arm/mach-omap2/mux.c')
| -rw-r--r-- | arch/arm/mach-omap2/mux.c | 1153 |
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; -} - |