diff options
Diffstat (limited to 'arch/arm/mach-omap1/mux.c')
| -rw-r--r-- | arch/arm/mach-omap1/mux.c | 146 |
1 files changed, 133 insertions, 13 deletions
diff --git a/arch/arm/mach-omap1/mux.c b/arch/arm/mach-omap1/mux.c index 52c70e5fcf65..e207bf7cb853 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 |