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Diffstat (limited to 'arch/arm/plat-omap/mux.c')
-rw-r--r--arch/arm/plat-omap/mux.c174
1 files changed, 22 insertions, 152 deletions
diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c
index 75211f20ccb..6f3f459731c 100644
--- a/arch/arm/plat-omap/mux.c
+++ b/arch/arm/plat-omap/mux.c
@@ -3,9 +3,9 @@
*
* Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h
*
- * 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
@@ -32,21 +32,17 @@
#ifdef CONFIG_OMAP_MUX
-#define OMAP24XX_L4_BASE 0x48000000
-#define OMAP24XX_PULL_ENA (1 << 3)
-#define OMAP24XX_PULL_UP (1 << 4)
+static struct omap_mux_cfg *mux_cfg;
-static struct pin_config * pin_table;
-static unsigned long pin_table_sz;
-
-extern struct pin_config * omap730_pins;
-extern struct pin_config * omap1xxx_pins;
-extern struct pin_config * omap24xx_pins;
-
-int __init omap_mux_register(struct pin_config * pins, unsigned long size)
+int __init omap_mux_register(struct omap_mux_cfg *arch_mux_cfg)
{
- pin_table = pins;
- pin_table_sz = size;
+ if (!arch_mux_cfg || !arch_mux_cfg->pins || arch_mux_cfg->size == 0
+ || !arch_mux_cfg->cfg_reg) {
+ printk(KERN_ERR "Invalid pin table\n");
+ return -EINVAL;
+ }
+
+ mux_cfg = arch_mux_cfg;
return 0;
}
@@ -56,152 +52,26 @@ int __init omap_mux_register(struct pin_config * pins, unsigned long size)
*/
int __init_or_module omap_cfg_reg(const unsigned long index)
{
- static DEFINE_SPINLOCK(mux_spin_lock);
-
- unsigned long flags;
- struct pin_config *cfg;
- unsigned int reg_orig = 0, reg = 0, pu_pd_orig = 0, pu_pd = 0,
- pull_orig = 0, pull = 0;
- unsigned int mask, warn = 0;
+ struct pin_config *reg;
- if (!pin_table)
- BUG();
+ if (mux_cfg == NULL) {
+ printk(KERN_ERR "Pin mux table not initialized\n");
+ return -ENODEV;
+ }
- if (index >= pin_table_sz) {
+ if (index >= mux_cfg->size) {
printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n",
- index, pin_table_sz);
+ index, mux_cfg->size);
dump_stack();
return -ENODEV;
}
- cfg = (struct pin_config *)&pin_table[index];
- if (cpu_is_omap24xx()) {
- u8 reg = 0;
-
- reg |= cfg->mask & 0x7;
- if (cfg->pull_val)
- reg |= OMAP24XX_PULL_ENA;
- if(cfg->pu_pd_val)
- reg |= OMAP24XX_PULL_UP;
-#if defined(CONFIG_OMAP_MUX_DEBUG) || defined(CONFIG_OMAP_MUX_WARNINGS)
- {
- u8 orig = omap_readb(OMAP24XX_L4_BASE + cfg->mux_reg);
- u8 debug = 0;
-
-#ifdef CONFIG_OMAP_MUX_DEBUG
- debug = cfg->debug;
-#endif
- warn = (orig != reg);
- if (debug || warn)
- printk("MUX: setup %s (0x%08x): 0x%02x -> 0x%02x\n",
- cfg->name,
- OMAP24XX_L4_BASE + cfg->mux_reg,
- orig, reg);
- }
-#endif
- omap_writeb(reg, OMAP24XX_L4_BASE + cfg->mux_reg);
+ reg = (struct pin_config *)&mux_cfg->pins[index];
- return 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
- }
-
-#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
+ if (!mux_cfg->cfg_reg)
+ return -ENODEV;
-#ifdef CONFIG_OMAP_MUX_ERRORS
- return warn ? -ETXTBSY : 0;
-#else
- return 0;
-#endif
+ return mux_cfg->cfg_reg(reg);
}
EXPORT_SYMBOL(omap_cfg_reg);
#else