diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-28 13:40:20 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-28 13:48:38 -0700 |
commit | 7c730ccdc1188b97f5c8cb690906242c7ed75c22 (patch) | |
tree | 17ccd927e70dadaf59104c53cce892474eb539b2 /arch/x86/mach-rdc321x/gpio.c | |
parent | Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 (diff) | |
parent | Merge branch 'linus' into percpu-cpumask-x86-for-linus-2 (diff) | |
download | linux-dev-7c730ccdc1188b97f5c8cb690906242c7ed75c22.tar.xz linux-dev-7c730ccdc1188b97f5c8cb690906242c7ed75c22.zip |
Merge branch 'percpu-cpumask-x86-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'percpu-cpumask-x86-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (682 commits)
percpu: fix spurious alignment WARN in legacy SMP percpu allocator
percpu: generalize embedding first chunk setup helper
percpu: more flexibility for @dyn_size of pcpu_setup_first_chunk()
percpu: make x86 addr <-> pcpu ptr conversion macros generic
linker script: define __per_cpu_load on all SMP capable archs
x86: UV: remove uv_flush_tlb_others() WARN_ON
percpu: finer grained locking to break deadlock and allow atomic free
percpu: move fully free chunk reclamation into a work
percpu: move chunk area map extension out of area allocation
percpu: replace pcpu_realloc() with pcpu_mem_alloc() and pcpu_mem_free()
x86, percpu: setup reserved percpu area for x86_64
percpu, module: implement reserved allocation and use it for module percpu variables
percpu: add an indirection ptr for chunk page map access
x86: make embedding percpu allocator return excessive free space
percpu: use negative for auto for pcpu_setup_first_chunk() arguments
percpu: improve first chunk initial area map handling
percpu: cosmetic renames in pcpu_setup_first_chunk()
percpu: clean up percpu constants
x86: un-__init fill_pud/pmd/pte
x86: remove vestigial fix_ioremap prototypes
...
Manually merge conflicts in arch/ia64/kernel/irq_ia64.c
Diffstat (limited to 'arch/x86/mach-rdc321x/gpio.c')
-rw-r--r-- | arch/x86/mach-rdc321x/gpio.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/arch/x86/mach-rdc321x/gpio.c b/arch/x86/mach-rdc321x/gpio.c deleted file mode 100644 index 247f33d3a407..000000000000 --- a/arch/x86/mach-rdc321x/gpio.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * GPIO support for RDC SoC R3210/R8610 - * - * Copyright (C) 2007, Florian Fainelli <florian@openwrt.org> - * Copyright (C) 2008, Volker Weiss <dev@tintuc.de> - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - - -#include <linux/spinlock.h> -#include <linux/io.h> -#include <linux/types.h> -#include <linux/module.h> - -#include <asm/gpio.h> -#include <asm/mach-rdc321x/rdc321x_defs.h> - - -/* spin lock to protect our private copy of GPIO data register plus - the access to PCI conf registers. */ -static DEFINE_SPINLOCK(gpio_lock); - -/* copy of GPIO data registers */ -static u32 gpio_data_reg1; -static u32 gpio_data_reg2; - -static u32 gpio_request_data[2]; - - -static inline void rdc321x_conf_write(unsigned addr, u32 value) -{ - outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR); - outl(value, RDC3210_CFGREG_DATA); -} - -static inline void rdc321x_conf_or(unsigned addr, u32 value) -{ - outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR); - value |= inl(RDC3210_CFGREG_DATA); - outl(value, RDC3210_CFGREG_DATA); -} - -static inline u32 rdc321x_conf_read(unsigned addr) -{ - outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR); - - return inl(RDC3210_CFGREG_DATA); -} - -/* configure pin as GPIO */ -static void rdc321x_configure_gpio(unsigned gpio) -{ - unsigned long flags; - - spin_lock_irqsave(&gpio_lock, flags); - rdc321x_conf_or(gpio < 32 - ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2, - 1 << (gpio & 0x1f)); - spin_unlock_irqrestore(&gpio_lock, flags); -} - -/* initially setup the 2 copies of the gpio data registers. - This function must be called by the platform setup code. */ -void __init rdc321x_gpio_setup() -{ - /* this might not be, what others (BIOS, bootloader, etc.) - wrote to these registers before, but it's a good guess. Still - better than just using 0xffffffff. */ - - gpio_data_reg1 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG1); - gpio_data_reg2 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG2); -} - -/* determine, if gpio number is valid */ -static inline int rdc321x_is_gpio(unsigned gpio) -{ - return gpio <= RDC321X_MAX_GPIO; -} - -/* request GPIO */ -int rdc_gpio_request(unsigned gpio, const char *label) -{ - unsigned long flags; - - if (!rdc321x_is_gpio(gpio)) - return -EINVAL; - - spin_lock_irqsave(&gpio_lock, flags); - if (gpio_request_data[(gpio & 0x20) ? 1 : 0] & (1 << (gpio & 0x1f))) - goto inuse; - gpio_request_data[(gpio & 0x20) ? 1 : 0] |= (1 << (gpio & 0x1f)); - spin_unlock_irqrestore(&gpio_lock, flags); - - return 0; -inuse: - spin_unlock_irqrestore(&gpio_lock, flags); - return -EINVAL; -} -EXPORT_SYMBOL(rdc_gpio_request); - -/* release previously-claimed GPIO */ -void rdc_gpio_free(unsigned gpio) -{ - unsigned long flags; - - if (!rdc321x_is_gpio(gpio)) - return; - - spin_lock_irqsave(&gpio_lock, flags); - gpio_request_data[(gpio & 0x20) ? 1 : 0] &= ~(1 << (gpio & 0x1f)); - spin_unlock_irqrestore(&gpio_lock, flags); -} -EXPORT_SYMBOL(rdc_gpio_free); - -/* read GPIO pin */ -int rdc_gpio_get_value(unsigned gpio) -{ - u32 reg; - unsigned long flags; - - spin_lock_irqsave(&gpio_lock, flags); - reg = rdc321x_conf_read(gpio < 32 - ? RDC321X_GPIO_DATA_REG1 : RDC321X_GPIO_DATA_REG2); - spin_unlock_irqrestore(&gpio_lock, flags); - - return (1 << (gpio & 0x1f)) & reg ? 1 : 0; -} -EXPORT_SYMBOL(rdc_gpio_get_value); - -/* set GPIO pin to value */ -void rdc_gpio_set_value(unsigned gpio, int value) -{ - unsigned long flags; - u32 reg; - - reg = 1 << (gpio & 0x1f); - if (gpio < 32) { - spin_lock_irqsave(&gpio_lock, flags); - if (value) - gpio_data_reg1 |= reg; - else - gpio_data_reg1 &= ~reg; - rdc321x_conf_write(RDC321X_GPIO_DATA_REG1, gpio_data_reg1); - spin_unlock_irqrestore(&gpio_lock, flags); - } else { - spin_lock_irqsave(&gpio_lock, flags); - if (value) - gpio_data_reg2 |= reg; - else - gpio_data_reg2 &= ~reg; - rdc321x_conf_write(RDC321X_GPIO_DATA_REG2, gpio_data_reg2); - spin_unlock_irqrestore(&gpio_lock, flags); - } -} -EXPORT_SYMBOL(rdc_gpio_set_value); - -/* configure GPIO pin as input */ -int rdc_gpio_direction_input(unsigned gpio) -{ - if (!rdc321x_is_gpio(gpio)) - return -EINVAL; - - rdc321x_configure_gpio(gpio); - - return 0; -} -EXPORT_SYMBOL(rdc_gpio_direction_input); - -/* configure GPIO pin as output and set value */ -int rdc_gpio_direction_output(unsigned gpio, int value) -{ - if (!rdc321x_is_gpio(gpio)) - return -EINVAL; - - gpio_set_value(gpio, value); - rdc321x_configure_gpio(gpio); - - return 0; -} -EXPORT_SYMBOL(rdc_gpio_direction_output); |