diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-21 15:40:55 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-21 15:40:55 -0700 |
commit | 85b375a613085b78531ec86369a51c2f3b922f95 (patch) | |
tree | 716437d598de92bbd7acaf24622e9a7d74fc209a /arch/arm/mach-ns9xxx/gpio-ns9360.c | |
parent | ec965350bb98bd291eb34f6ecddfdcfc36da1e6e (diff) | |
parent | cf816ecb533ab96b883dfdc0db174598b5b5c4d2 (diff) |
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (212 commits)
[ARM] pxa: Phycore pcm-990-specific code for the PXA270 Quick Capture driver
[ARM] pxa: V4L2 soc_camera driver for PXA270
[ARM] pxa: restrict availability of pxa2xx PCMCIA drivers
[ARM] 5005/1: BAST: Fix kset_name initialiser
[ARM] 4967/1: Adds functions to set clkout rate for Samsung S3C2410
[ARM] 4988/1: Add GPIO lib support to the EP93xx
[ARM] Add initial sparsemem support
[ARM] pxa: initialise PXA devices before platform init code
[ARM] 5002/1: tosa: add two more leds
[ARM] 5004/1: Tosa: make several unreferenced structures static.
[ARM] 5003/1: Shut up sparse warnings
[ARM] 4977/2: soc - pxa2xx-ac97 - Add missing clk_enable()
[ARM] 4976/1: zylonite: Configure GPIO for WM9713 IRQ line
[ARM] 4974/1: Drop unused leds-tosa.
[ARM] 4973/1: Tosa: use leds-gpio driver.
[ARM] 4972/1: Tosa: convert scoop GPIOs usage to generic gpio code
[ARM] 4971/1: pxaficp_ir: provide startup and shutdown hooks
[ARM] pxa: lubbock: move mis-placed SPI info
[ARM] 4970/1: tosa: correct gpio used for wake up.
[ARM] 4966/1: magician: add MFP pin configuration
...
Diffstat (limited to 'arch/arm/mach-ns9xxx/gpio-ns9360.c')
-rw-r--r-- | arch/arm/mach-ns9xxx/gpio-ns9360.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/arch/arm/mach-ns9xxx/gpio-ns9360.c b/arch/arm/mach-ns9xxx/gpio-ns9360.c new file mode 100644 index 00000000000..cabfb879dda --- /dev/null +++ b/arch/arm/mach-ns9xxx/gpio-ns9360.c @@ -0,0 +1,118 @@ +/* + * arch/arm/mach-ns9xxx/gpio-ns9360.c + * + * Copyright (C) 2006,2007 by Digi International Inc. + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ +#include <linux/bug.h> +#include <linux/errno.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include <asm/arch-ns9xxx/regs-bbu.h> +#include <asm/arch-ns9xxx/processor-ns9360.h> + +#include "gpio-ns9360.h" + +static inline int ns9360_valid_gpio(unsigned gpio) +{ + return gpio <= 72; +} + +static inline void __iomem *ns9360_gpio_get_gconfaddr(unsigned gpio) +{ + if (gpio < 56) + return BBU_GCONFb1(gpio / 8); + else + /* + * this could be optimised away on + * ns9750 only builds, but it isn't ... + */ + return BBU_GCONFb2((gpio - 56) / 8); +} + +static inline void __iomem *ns9360_gpio_get_gctrladdr(unsigned gpio) +{ + if (gpio < 32) + return BBU_GCTRL1; + else if (gpio < 64) + return BBU_GCTRL2; + else + /* this could be optimised away on ns9750 only builds */ + return BBU_GCTRL3; +} + +static inline void __iomem *ns9360_gpio_get_gstataddr(unsigned gpio) +{ + if (gpio < 32) + return BBU_GSTAT1; + else if (gpio < 64) + return BBU_GSTAT2; + else + /* this could be optimised away on ns9750 only builds */ + return BBU_GSTAT3; +} + +/* + * each gpio can serve for 4 different purposes [0..3]. These are called + * "functions" and passed in the parameter func. Functions 0-2 are always some + * special things, function 3 is GPIO. If func == 3 dir specifies input or + * output, and with inv you can enable an inverter (independent of func). + */ +int __ns9360_gpio_configure(unsigned gpio, int dir, int inv, int func) +{ + void __iomem *conf = ns9360_gpio_get_gconfaddr(gpio); + u32 confval; + + confval = __raw_readl(conf); + REGSETIM_IDX(confval, BBU_GCONFx, DIR, gpio & 7, dir); + REGSETIM_IDX(confval, BBU_GCONFx, INV, gpio & 7, inv); + REGSETIM_IDX(confval, BBU_GCONFx, FUNC, gpio & 7, func); + __raw_writel(confval, conf); + + return 0; +} + +int ns9360_gpio_configure(unsigned gpio, int inv, int func) +{ + if (likely(ns9360_valid_gpio(gpio))) { + if (func == 3) { + printk(KERN_WARNING "use gpio_direction_input " + "or gpio_direction_output\n"); + return -EINVAL; + } else + return __ns9360_gpio_configure(gpio, 0, inv, func); + } else + return -EINVAL; +} +EXPORT_SYMBOL(ns9360_gpio_configure); + +int ns9360_gpio_get_value(unsigned gpio) +{ + void __iomem *stat = ns9360_gpio_get_gstataddr(gpio); + int ret; + + ret = 1 & (__raw_readl(stat) >> (gpio & 31)); + + return ret; +} + +void ns9360_gpio_set_value(unsigned gpio, int value) +{ + void __iomem *ctrl = ns9360_gpio_get_gctrladdr(gpio); + u32 ctrlval; + + ctrlval = __raw_readl(ctrl); + + if (value) + ctrlval |= 1 << (gpio & 31); + else + ctrlval &= ~(1 << (gpio & 31)); + + __raw_writel(ctrlval, ctrl); +} |