Initially only for 34xx. Keep the old code working
until the data has been converted to the new style
format.
REVISIT: Add support for cmdline parsing
REVISIT: Add a function to get mux register by GPIO pin
REVISIT: Add a function to set an array of mux entries
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm/mach-omap2/mux.c | 237 +++++++++++++++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/mux.h | 125 ++++++++++++++++++++++++
2 files changed, 362 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/mux.h
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 9841423..45e6d4d 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -27,12 +27,15 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
+#include <linux/list.h>
#include <asm/system.h>
#include <plat/control.h>
#include <plat/mux.h>
+#include "mux.h"
+
#ifdef CONFIG_OMAP_MUX
#define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
@@ -626,6 +629,11 @@ static int __init_or_module omap24xx_cfg_reg(const struct pin_config *cfg)
#endif
#ifdef CONFIG_ARCH_OMAP34XX
+
+/*
+ * NOTE: This function will disappear soon, please use the new
+ * omap_mux_set() instead
+ */
static int __init_or_module omap34xx_cfg_reg(const struct pin_config *cfg)
{
static DEFINE_SPINLOCK(mux_spin_lock);
@@ -644,6 +652,235 @@ static int __init_or_module omap34xx_cfg_reg(const struct pin_config *cfg)
#define omap34xx_cfg_reg NULL
#endif
+/*----------------------------------------------------------------------------*/
+
+#ifdef CONFIG_ARCH_OMAP34XX
+
+static LIST_HEAD(muxmodes);
+static DEFINE_MUTEX(muxmode_mutex);
+
+/*
+ * REVISIT: See if pin is set dynamic, and add it to the list
+ */
+int omap_mux_set(u16 val, u16 mux_offset, int flags)
+{
+ omap_mux_write(val, mux_offset);
+
+ return 0;
+}
+
+struct omap_mux_entry {
+ struct omap_mux mux;
+ struct list_head node;
+};
+
+static struct omap_mux *omap_mux_list_add(struct omap_mux *src)
+{
+ struct omap_mux_entry *entry;
+ struct omap_mux *m;
+
+ int i;
+
+ entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL);
+ if (!entry)
+ return NULL;
+
+ m = &entry->mux;
+ memcpy(m, src, sizeof(struct omap_mux_entry));
+
+#ifdef CONFIG_DEBUG_FS
+ for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
+ if (src->muxnames[i]) {
+ m->muxnames[i] =
+ kzalloc(strlen(src->muxnames[i]) + 1,
+ GFP_KERNEL);
+ if (!m->muxnames[i])
+ goto free_names;
+ strcpy(m->muxnames[i], src->muxnames[i]);
+ }
+ }
+ for (i = 0; i < OMAP_MUX_NR_SIDES; i++) {
+ if (src->balls[i]) {
+ m->balls[i] =
+ kzalloc(strlen(src->balls[i]) + 1,
+ GFP_KERNEL);
+ if (!m->balls[i])
+ goto free_balls;
+ strcpy(m->balls[i], src->balls[i]);
+ }
+ }
+#endif
+
+ mutex_lock(&muxmode_mutex);
+ list_add(&entry->node, &muxmodes);
+ mutex_unlock(&muxmode_mutex);
+
+ return m;
+
+#ifdef CONFIG_DEBUG_FS
+free_balls:
+ for (i = 0; i < OMAP_MUX_NR_SIDES; i++)
+ if (m->balls[i])
+ kfree(m->balls[i]);
+free_names:
+ for (i = 0; i < OMAP_MUX_NR_MODES; i++)
+ if (m->muxnames[i])
+ kfree(m->muxnames[i]);
+#endif
+
+ kfree(entry);
+
+ return NULL;
+}
+
+static void __init omap_mux_apply_subset(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)
+ printk(KERN_ERR "mux: Unknown entry offset 0x%x\n",
+ p->reg_offset);
+ p++;
+ }
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+static void __init omap_mux_apply_pins(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)
+ printk(KERN_ERR "mux: Unknown ball offset 0x%x\n",
+ b->reg_offset);
+ b++;
+ }
+}
+
+#else /* CONFIG_DEBUG_FS */
+
+static inline void omap_mux_apply_pins(struct omap_ball *b,
+ struct omap_mux *superset)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
+
+static void __init omap_mux_set_board(struct omap_board_mux *board)
+{
+ while (board->reg_offset != OMAP_MUX_TERMINATOR) {
+ omap_mux_write(board->value, board->reg_offset);
+ board++;
+ }
+}
+
+static void __init omap_mux_init_dynamic(struct omap_board_mux *board_subset,
+ struct omap_mux *superset,
+ int flags)
+{
+ struct omap_mux *s = superset;
+ int always_dynamic = flags & OMAP_MUX_ALL_DYNAMIC;
+
+ while (s->reg_offset != OMAP_MUX_TERMINATOR) {
+ struct omap_mux *entry;
+
+ if (!always_dynamic) {
+ u16 mode;
+
+ /* GPIO pins must be always dynamic for PM */
+ mode = omap_mux_read(s->reg_offset) & 0x7;
+ if (mode != OMAP_MUX_MODE4)
+ continue;
+ }
+
+ entry = omap_mux_list_add(s);
+ if (!entry) {
+ printk(KERN_ERR "mux: Could not add entry\n");
+ return;
+ }
+ s++;
+ }
+
+ if (always_dynamic)
+ return;
+
+ /* Search for pins set as dynamic in the board-*.c file */
+ while (board_subset->reg_offset != OMAP_MUX_TERMINATOR) {
+
+ /* GPIO pins are always dynamic, and already handled */
+ if ((board_subset->value & 0x7) == OMAP_MUX_MODE4)
+ continue;
+
+ if (!(board_subset->flags & OMAP_MUX_DYNAMIC))
+ continue;
+
+ s = superset;
+ while (s->reg_offset != OMAP_MUX_TERMINATOR) {
+ if (s->reg_offset == board_subset->reg_offset) {
+ struct omap_mux *entry = omap_mux_list_add(s);
+ if (!entry) {
+ printk(KERN_ERR "mux: Could not add "
+ "board entry\n");
+ return;
+ }
+ }
+ s++;
+ }
+ board_subset++;
+ }
+}
+
+/*
+ * Do not call this from board-*.c files, use omap3_mux_init() instead
+ */
+int __init omap_mux_init(u32 mux_pbase, u32 mux_size,
+ struct omap_mux *superset,
+ struct omap_mux *package_subset,
+ struct omap_board_mux *board_subset,
+ struct omap_ball *package_balls,
+ int flags)
+{
+ /*
+ * REVISIT: Do the ioremap with mux_pbase here once after the old
+ * code is gone
+ * REVISIT: Do not initialize again if already called
+ */
+
+ omap_mux_apply_subset(package_subset, superset);
+ omap_mux_apply_pins(package_balls, superset);
+ omap_mux_set_board(board_subset);
+ omap_mux_init_dynamic(board_subset, superset, flags);
+
+ return 0;
+}
+
+#endif
+
+/*----------------------------------------------------------------------------*/
+
int __init omap2_mux_init(void)
{
u32 mux_pbase;
diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h
new file mode 100644
index 0000000..a8453f5
--- /dev/null
+++ b/arch/arm/mach-omap2/mux.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2009 Nokia
+ * Copyright (C) 2009 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define OMAP_MUX_TERMINATOR 0xffff
+
+/* 34xx mux mode options for each pin. See TRM for options */
+#define OMAP_MUX_MODE0 0
+#define OMAP_MUX_MODE1 1
+#define OMAP_MUX_MODE2 2
+#define OMAP_MUX_MODE3 3
+#define OMAP_MUX_MODE4 4
+#define OMAP_MUX_MODE5 5
+#define OMAP_MUX_MODE6 6
+#define OMAP_MUX_MODE7 7
+
+/* 24xx/34xx mux bit defines */
+#define OMAP_PULL_ENA (1 << 3)
+#define OMAP_PULL_UP (1 << 4)
+#define OMAP_ALTELECTRICALSEL (1 << 5)
+
+/* 34xx specific mux bit defines */
+#define OMAP_INPUT_EN (1 << 8)
+#define OMAP_OFF_EN (1 << 9)
+#define OMAP_OFFOUT_EN (1 << 10)
+#define OMAP_OFFOUT_VAL (1 << 11)
+#define OMAP_OFF_PULL_EN (1 << 12)
+#define OMAP_OFF_PULL_UP (1 << 13)
+#define OMAP_WAKEUP_EN (1 << 14)
+
+/* Active pin states */
+#define OMAP_PIN_OUTPUT 0
+#define OMAP_PIN_INPUT OMAP_INPUT_EN
+#define OMAP_PIN_INPUT_PULLUP (OMAP_PULL_ENA | OMAP_INPUT_EN \
+ | OMAP_PULL_UP)
+#define OMAP_PIN_INPUT_PULLDOWN (OMAP_PULL_ENA | OMAP_INPUT_EN)
+
+/* Off mode states */
+#define OMAP_PIN_OFF_NONE 0
+#define OMAP_PIN_OFF_OUTPUT_HIGH (OMAP_OFF_EN | OMAP_OFFOUT_EN \
+ | OMAP_OFFOUT_VAL)
+#define OMAP_PIN_OFF_OUTPUT_LOW (OMAP_OFF_EN | OMAP_OFFOUT_EN)
+#define OMAP_PIN_OFF_INPUT_PULLUP (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
+ | OMAP_OFF_PULL_UP)
+#define OMAP_PIN_OFF_INPUT_PULLDOWN (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
+#define OMAP_PIN_OFF_WAKEUPENABLE OMAP_WAKEUP_EN
+
+/* Flags for struct omap_board_mux */
+#define OMAP_MUX_DYNAMIC (1 << 0) /* Keep mux in memory */
+
+/* Flags for omap_mux_init */
+#define OMAP_MUX_ALL_DYNAMIC (1 << 16) /* Always in memory */
+#define OMAP_PACKAGE_MASK 0xffff
+#define OMAP_PACKAGE_CUS 3 /* 423-pin 0.65 */
+#define OMAP_PACKAGE_CBB 2 /* 515-pin 0.40 0.50 */
+#define OMAP_PACKAGE_CBC 1 /* 515-pin 0.50 0.65 */
+
+
+#define OMAP_MUX_NR_MODES 8 /* Available modes */
+#define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
+
+/**
+ * struct omap_mux - data for omap mux register offset and it's value
+ * @reg_offset: mux register offset from the mux base
+ * @gpio: GPIO number
+ * @muxnames: available signal modes for a ball
+ */
+struct omap_mux {
+ u16 reg_offset;
+ u16 gpio;
+#ifdef CONFIG_DEBUG_FS
+ char *muxnames[OMAP_MUX_NR_MODES];
+ char *balls[OMAP_MUX_NR_SIDES];
+#endif
+};
+
+/**
+ * struct omap_ball - data for balls on omap package
+ * @reg_offset: mux register offset from the mux base
+ * @balls: available balls on the package
+ */
+struct omap_ball {
+ u16 reg_offset;
+ char *balls[OMAP_MUX_NR_SIDES];
+};
+
+/**
+ * struct omap_board_mux - data for initializing mux registers
+ * @reg_offset: mux register offset from the mux base
+ * @mux_value: desired mux value to set
+ * @flags: extra flags
+ */
+struct omap_board_mux {
+ u16 reg_offset;
+ u16 value;
+ u32 flags;
+};
+
+#if defined(CONFIG_OMAP_MUX) && defined(CONFIG_ARCH_OMAP34XX)
+
+int omap3_mux_init(struct omap_board_mux *board_mux_config, int flags);
+int omap_mux_init(u32 mux_pbase, u32 mux_size,
+ struct omap_mux *superset,
+ struct omap_mux *package_subset,
+ struct omap_board_mux *board_subset,
+ struct omap_ball *package_balls,
+ int flags);
+int omap_mux_set(u16 val, u16 mux_offset, int flags);
+
+#else
+
+static inline int omap3_mux_init(struct omap_board_mux *board_mux_config,
+ int flags)
+{
+}
+static inline int omap_mux_set(u16 val, u16 mux_offset, int flags)
+{
+}
+
+#endif
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