diff options
Diffstat (limited to 'arch/arm/mach-mxc91231/iomux.c')
| -rw-r--r-- | arch/arm/mach-mxc91231/iomux.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/arch/arm/mach-mxc91231/iomux.c b/arch/arm/mach-mxc91231/iomux.c deleted file mode 100644 index 66fc41cbf2c..00000000000 --- a/arch/arm/mach-mxc91231/iomux.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved. - * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de> - * Copyright (C) 2009 by Valentin Longchamp <valentin.longchamp@epfl.ch> - * - * 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., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301, USA. - */ - -#include <linux/module.h> -#include <linux/spinlock.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <mach/hardware.h> -#include <mach/gpio.h> -#include <mach/iomux-mxc91231.h> - -/* - * IOMUX register (base) addresses - */ -#define IOMUX_AP_BASE MXC91231_IO_ADDRESS(MXC91231_IOMUX_AP_BASE_ADDR) -#define IOMUX_COM_BASE MXC91231_IO_ADDRESS(MXC91231_IOMUX_COM_BASE_ADDR) -#define IOMUXSW_AP_MUX_CTL (IOMUX_AP_BASE + 0x000) -#define IOMUXSW_SP_MUX_CTL (IOMUX_COM_BASE + 0x000) -#define IOMUXSW_PAD_CTL (IOMUX_COM_BASE + 0x200) - -#define IOMUXINT_OBS1 (IOMUX_AP_BASE + 0x600) -#define IOMUXINT_OBS2 (IOMUX_AP_BASE + 0x004) - -static DEFINE_SPINLOCK(gpio_mux_lock); - -#define NB_PORTS ((PIN_MAX + 32) / 32) -#define PIN_GLOBAL_NUM(pin) \ - (((pin & MUX_SIDE_MASK) >> MUX_SIDE_SHIFT)*PIN_AP_MAX + \ - ((pin & MUX_REG_MASK) >> MUX_REG_SHIFT)*4 + \ - ((pin & MUX_FIELD_MASK) >> MUX_FIELD_SHIFT)) - -unsigned long mxc_pin_alloc_map[NB_PORTS * 32 / BITS_PER_LONG]; -/* - * set the mode for a IOMUX pin. - */ -int mxc_iomux_mode(unsigned int pin_mode) -{ - u32 side, field, l, mode, ret = 0; - void __iomem *reg; - - side = (pin_mode & MUX_SIDE_MASK) >> MUX_SIDE_SHIFT; - switch (side) { - case MUX_SIDE_AP: - reg = IOMUXSW_AP_MUX_CTL; - break; - case MUX_SIDE_SP: - reg = IOMUXSW_SP_MUX_CTL; - break; - default: - return -EINVAL; - } - reg += ((pin_mode & MUX_REG_MASK) >> MUX_REG_SHIFT) * 4; - field = (pin_mode & MUX_FIELD_MASK) >> MUX_FIELD_SHIFT; - mode = (pin_mode & MUX_MODE_MASK) >> MUX_MODE_SHIFT; - - spin_lock(&gpio_mux_lock); - - l = __raw_readl(reg); - l &= ~(0xff << (field * 8)); - l |= mode << (field * 8); - __raw_writel(l, reg); - - spin_unlock(&gpio_mux_lock); - - return ret; -} -EXPORT_SYMBOL(mxc_iomux_mode); - -/* - * This function configures the pad value for a IOMUX pin. - */ -void mxc_iomux_set_pad(enum iomux_pins pin, u32 config) -{ - u32 padgrp, field, l; - void __iomem *reg; - - padgrp = (pin & MUX_PADGRP_MASK) >> MUX_PADGRP_SHIFT; - reg = IOMUXSW_PAD_CTL + (pin + 2) / 3 * 4; - field = (pin + 2) % 3; - - pr_debug("%s: reg offset = 0x%x, field = %d\n", - __func__, (pin + 2) / 3, field); - - spin_lock(&gpio_mux_lock); - - l = __raw_readl(reg); - l &= ~(0x1ff << (field * 10)); - l |= config << (field * 10); - __raw_writel(l, reg); - - spin_unlock(&gpio_mux_lock); -} -EXPORT_SYMBOL(mxc_iomux_set_pad); - -/* - * allocs a single pin: - * - reserves the pin so that it is not claimed by another driver - * - setups the iomux according to the configuration - */ -int mxc_iomux_alloc_pin(unsigned int pin_mode, const char *label) -{ - unsigned pad = PIN_GLOBAL_NUM(pin_mode); - if (pad >= (PIN_MAX + 1)) { - printk(KERN_ERR "mxc_iomux: Attempt to request nonexistant pin %u for \"%s\"\n", - pad, label ? label : "?"); - return -EINVAL; - } - - if (test_and_set_bit(pad, mxc_pin_alloc_map)) { - printk(KERN_ERR "mxc_iomux: pin %u already used. Allocation for \"%s\" failed\n", - pad, label ? label : "?"); - return -EBUSY; - } - mxc_iomux_mode(pin_mode); - - return 0; -} -EXPORT_SYMBOL(mxc_iomux_alloc_pin); - -int mxc_iomux_setup_multiple_pins(const unsigned int *pin_list, unsigned count, - const char *label) -{ - const unsigned int *p = pin_list; - int i; - int ret = -EINVAL; - - for (i = 0; i < count; i++) { - ret = mxc_iomux_alloc_pin(*p, label); - if (ret) - goto setup_error; - p++; - } - return 0; - -setup_error: - mxc_iomux_release_multiple_pins(pin_list, i); - return ret; -} -EXPORT_SYMBOL(mxc_iomux_setup_multiple_pins); - -void mxc_iomux_release_pin(unsigned int pin_mode) -{ - unsigned pad = PIN_GLOBAL_NUM(pin_mode); - - if (pad < (PIN_MAX + 1)) - clear_bit(pad, mxc_pin_alloc_map); -} -EXPORT_SYMBOL(mxc_iomux_release_pin); - -void mxc_iomux_release_multiple_pins(const unsigned int *pin_list, int count) -{ - const unsigned int *p = pin_list; - int i; - - for (i = 0; i < count; i++) { - mxc_iomux_release_pin(*p); - p++; - } -} -EXPORT_SYMBOL(mxc_iomux_release_multiple_pins); |