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Diffstat (limited to 'arch/arm/mach-omap1/mux.c')
-rw-r--r--arch/arm/mach-omap1/mux.c146
1 files changed, 133 insertions, 13 deletions
diff --git a/arch/arm/mach-omap1/mux.c b/arch/arm/mach-omap1/mux.c
index 52c70e5fcf6..e207bf7cb85 100644
--- a/arch/arm/mach-omap1/mux.c
+++ b/arch/arm/mach-omap1/mux.c
@@ -3,9 +3,9 @@
*
* OMAP1 pin multiplexing configurations
*
- * Copyright (C) 2003 - 2005 Nokia Corporation
+ * Copyright (C) 2003 - 2008 Nokia Corporation
*
- * Written by Tony Lindgren <tony.lindgren@nokia.com>
+ * 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
@@ -32,8 +32,10 @@
#ifdef CONFIG_OMAP_MUX
+static struct omap_mux_cfg arch_mux_cfg;
+
#ifdef CONFIG_ARCH_OMAP730
-struct pin_config __initdata_or_module omap730_pins[] = {
+static struct pin_config __initdata_or_module omap730_pins[] = {
MUX_CFG_730("E2_730_KBR0", 12, 21, 0, 20, 1, 0)
MUX_CFG_730("J7_730_KBR1", 12, 25, 0, 24, 1, 0)
MUX_CFG_730("E1_730_KBR2", 12, 29, 0, 28, 1, 0)
@@ -49,10 +51,14 @@ MUX_CFG_730("AA17_730_USB_DM", 2, 21, 0, 20, 0, 0)
MUX_CFG_730("W16_730_USB_PU_EN", 2, 25, 0, 24, 0, 0)
MUX_CFG_730("W17_730_USB_VBUSI", 2, 29, 0, 28, 0, 0)
};
-#endif
+#define OMAP730_PINS_SZ ARRAY_SIZE(omap730_pins)
+#else
+#define omap730_pins NULL
+#define OMAP730_PINS_SZ 0
+#endif /* CONFIG_ARCH_OMAP730 */
#if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
-struct pin_config __initdata_or_module omap1xxx_pins[] = {
+static struct pin_config __initdata_or_module omap1xxx_pins[] = {
/*
* description mux mode mux pull pull pull pu_pd pu dbg
* reg offset mode reg bit ena reg
@@ -306,22 +312,136 @@ MUX_CFG("Y12_1610_CCP_CLKP", 8, 18, 6, 1, 24, 1, 1, 0, 0)
MUX_CFG("W13_1610_CCP_CLKM", 9, 0, 6, 1, 28, 1, 1, 0, 0)
MUX_CFG("W14_1610_CCP_DATAP", 9, 24, 6, 2, 4, 1, 2, 0, 0)
MUX_CFG("Y14_1610_CCP_DATAM", 9, 21, 6, 2, 3, 1, 2, 0, 0)
-
};
+#define OMAP1XXX_PINS_SZ ARRAY_SIZE(omap1xxx_pins)
+#else
+#define omap1xxx_pins NULL
+#define OMAP1XXX_PINS_SZ 0
#endif /* CONFIG_ARCH_OMAP15XX || CONFIG_ARCH_OMAP16XX */
-int __init omap1_mux_init(void)
+int __init_or_module omap1_cfg_reg(const struct pin_config *cfg)
{
-
-#ifdef CONFIG_ARCH_OMAP730
- omap_mux_register(omap730_pins, ARRAY_SIZE(omap730_pins));
+ static DEFINE_SPINLOCK(mux_spin_lock);
+ unsigned long flags;
+ unsigned int reg_orig = 0, reg = 0, pu_pd_orig = 0, pu_pd = 0,
+ pull_orig = 0, pull = 0;
+ unsigned int mask, warn = 0;
+
+ /* Check the mux register in question */
+ if (cfg->mux_reg) {
+ unsigned tmp1, tmp2;
+
+ spin_lock_irqsave(&mux_spin_lock, flags);
+ reg_orig = omap_readl(cfg->mux_reg);
+
+ /* The mux registers always seem to be 3 bits long */
+ mask = (0x7 << cfg->mask_offset);
+ tmp1 = reg_orig & mask;
+ reg = reg_orig & ~mask;
+
+ tmp2 = (cfg->mask << cfg->mask_offset);
+ reg |= tmp2;
+
+ if (tmp1 != tmp2)
+ warn = 1;
+
+ omap_writel(reg, cfg->mux_reg);
+ spin_unlock_irqrestore(&mux_spin_lock, flags);
+ }
+
+ /* Check for pull up or pull down selection on 1610 */
+ if (!cpu_is_omap15xx()) {
+ if (cfg->pu_pd_reg && cfg->pull_val) {
+ spin_lock_irqsave(&mux_spin_lock, flags);
+ pu_pd_orig = omap_readl(cfg->pu_pd_reg);
+ mask = 1 << cfg->pull_bit;
+
+ if (cfg->pu_pd_val) {
+ if (!(pu_pd_orig & mask))
+ warn = 1;
+ /* Use pull up */
+ pu_pd = pu_pd_orig | mask;
+ } else {
+ if (pu_pd_orig & mask)
+ warn = 1;
+ /* Use pull down */
+ pu_pd = pu_pd_orig & ~mask;
+ }
+ omap_writel(pu_pd, cfg->pu_pd_reg);
+ spin_unlock_irqrestore(&mux_spin_lock, flags);
+ }
+ }
+
+ /* Check for an associated pull down register */
+ if (cfg->pull_reg) {
+ spin_lock_irqsave(&mux_spin_lock, flags);
+ pull_orig = omap_readl(cfg->pull_reg);
+ mask = 1 << cfg->pull_bit;
+
+ if (cfg->pull_val) {
+ if (pull_orig & mask)
+ warn = 1;
+ /* Low bit = pull enabled */
+ pull = pull_orig & ~mask;
+ } else {
+ if (!(pull_orig & mask))
+ warn = 1;
+ /* High bit = pull disabled */
+ pull = pull_orig | mask;
+ }
+
+ omap_writel(pull, cfg->pull_reg);
+ spin_unlock_irqrestore(&mux_spin_lock, flags);
+ }
+
+ if (warn) {
+#ifdef CONFIG_OMAP_MUX_WARNINGS
+ printk(KERN_WARNING "MUX: initialized %s\n", cfg->name);
#endif
-
-#if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
- omap_mux_register(omap1xxx_pins, ARRAY_SIZE(omap1xxx_pins));
+ }
+
+#ifdef CONFIG_OMAP_MUX_DEBUG
+ if (cfg->debug || warn) {
+ printk("MUX: Setting register %s\n", cfg->name);
+ printk(" %s (0x%08x) = 0x%08x -> 0x%08x\n",
+ cfg->mux_reg_name, cfg->mux_reg, reg_orig, reg);
+
+ if (!cpu_is_omap15xx()) {
+ if (cfg->pu_pd_reg && cfg->pull_val) {
+ printk(" %s (0x%08x) = 0x%08x -> 0x%08x\n",
+ cfg->pu_pd_name, cfg->pu_pd_reg,
+ pu_pd_orig, pu_pd);
+ }
+ }
+
+ if (cfg->pull_reg)
+ printk(" %s (0x%08x) = 0x%08x -> 0x%08x\n",
+ cfg->pull_name, cfg->pull_reg, pull_orig, pull);
+ }
#endif
+#ifdef CONFIG_OMAP_MUX_ERRORS
+ return warn ? -ETXTBSY : 0;
+#else
return 0;
+#endif
+}
+
+int __init omap1_mux_init(void)
+{
+ if (cpu_is_omap730()) {
+ arch_mux_cfg.pins = omap730_pins;
+ arch_mux_cfg.size = OMAP730_PINS_SZ;
+ arch_mux_cfg.cfg_reg = omap1_cfg_reg;
+ }
+
+ if (cpu_is_omap15xx() || cpu_is_omap16xx()) {
+ arch_mux_cfg.pins = omap1xxx_pins;
+ arch_mux_cfg.size = OMAP1XXX_PINS_SZ;
+ arch_mux_cfg.cfg_reg = omap1_cfg_reg;
+ }
+
+ return omap_mux_register(&arch_mux_cfg);
}
#endif