diff options
Diffstat (limited to 'arch/arm/plat-omap/mux.c')
| -rw-r--r-- | arch/arm/plat-omap/mux.c | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c deleted file mode 100644 index 75211f20ccb..00000000000 --- a/arch/arm/plat-omap/mux.c +++ /dev/null @@ -1,210 +0,0 @@ -/* - * linux/arch/arm/plat-omap/mux.c - * - * Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h - * - * Copyright (C) 2003 - 2005 Nokia Corporation - * - * Written by Tony Lindgren <tony.lindgren@nokia.com> - * - * 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/module.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <asm/system.h> -#include <asm/io.h> -#include <linux/spinlock.h> -#include <asm/arch/mux.h> - -#ifdef CONFIG_OMAP_MUX - -#define OMAP24XX_L4_BASE 0x48000000 -#define OMAP24XX_PULL_ENA (1 << 3) -#define OMAP24XX_PULL_UP (1 << 4) - -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) -{ - pin_table = pins; - pin_table_sz = size; - - return 0; -} - -/* - * Sets the Omap MUX and PULL_DWN registers based on the table - */ -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; - - if (!pin_table) - BUG(); - - if (index >= pin_table_sz) { - printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n", - index, pin_table_sz); - 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); - - 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 - -#ifdef CONFIG_OMAP_MUX_ERRORS - return warn ? -ETXTBSY : 0; -#else - return 0; -#endif -} -EXPORT_SYMBOL(omap_cfg_reg); -#else -#define omap_mux_init() do {} while(0) -#define omap_cfg_reg(x) do {} while(0) -#endif /* CONFIG_OMAP_MUX */ |