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review.evervolv.com / android_kernel_htc_msm8960 / 26a849f49fb3347d126a0ed6611173f903374ef4 / . / arch / mips / bcm47xx / gpio.c
blob: 5ebdf62e96bb6bf130d45a6e8db7f7c77ff00e2e [file] [log] [blame]
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200[diff] [blame]1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
7 */
8
Paul Gortmakercae39d12011-07-28 18:46:31 -0400[diff] [blame]9#include <linux/export.h>
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200[diff] [blame]10#include <linux/ssb/ssb.h>
11#include <linux/ssb/ssb_driver_chipcommon.h>
12#include <linux/ssb/ssb_driver_extif.h>
13#include <asm/mach-bcm47xx/bcm47xx.h>
14#include <asm/mach-bcm47xx/gpio.h>
15
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]16#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
17static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
18#else
19static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
20#endif
21
22int gpio_request(unsigned gpio, const char *tag)
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200[diff] [blame]23{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]24 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]25#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]26 case BCM47XX_BUS_TYPE_SSB:
27 if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
28 ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
29 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]30
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]31 if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
32 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
33 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]34
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]35 if (test_and_set_bit(gpio, gpio_in_use))
36 return -EBUSY;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]37
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]38 return 0;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]39#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +0200[diff] [blame]40#ifdef CONFIG_BCM47XX_BCMA
41 case BCM47XX_BUS_TYPE_BCMA:
42 if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
43 return -EINVAL;
44
45 if (test_and_set_bit(gpio, gpio_in_use))
46 return -EBUSY;
47
48 return 0;
49#endif
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]50 }
51 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]52}
53EXPORT_SYMBOL(gpio_request);
54
55void gpio_free(unsigned gpio)
56{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]57 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]58#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]59 case BCM47XX_BUS_TYPE_SSB:
60 if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
61 ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
62 return;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]63
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]64 if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
65 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
66 return;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]67
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]68 clear_bit(gpio, gpio_in_use);
69 return;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]70#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +0200[diff] [blame]71#ifdef CONFIG_BCM47XX_BCMA
72 case BCM47XX_BUS_TYPE_BCMA:
73 if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
74 return;
75
76 clear_bit(gpio, gpio_in_use);
77 return;
78#endif
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]79 }
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]80}
81EXPORT_SYMBOL(gpio_free);
82
83int gpio_to_irq(unsigned gpio)
84{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]85 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]86#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]87 case BCM47XX_BUS_TYPE_SSB:
88 if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco))
89 return ssb_mips_irq(bcm47xx_bus.ssb.chipco.dev) + 2;
90 else if (ssb_extif_available(&bcm47xx_bus.ssb.extif))
91 return ssb_mips_irq(bcm47xx_bus.ssb.extif.dev) + 2;
92 else
93 return -EINVAL;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]94#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +0200[diff] [blame]95#ifdef CONFIG_BCM47XX_BCMA
96 case BCM47XX_BUS_TYPE_BCMA:
97 return bcma_core_mips_irq(bcm47xx_bus.bcma.bus.drv_cc.core) + 2;
98#endif
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]99 }
100 return -EINVAL;
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200[diff] [blame]101}
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]102EXPORT_SYMBOL_GPL(gpio_to_irq);