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gerrit-public.fairphone.software / kernel / msm / c1d1c5d4213ee96e054c4d195117368972a4c01f / . / arch / mips / bcm47xx / gpio.c
blob: 57b425fd4d412b2e685804065255fef55af7affc [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
9#include <linux/ssb/ssb.h>
10#include <linux/ssb/ssb_driver_chipcommon.h>
11#include <linux/ssb/ssb_driver_extif.h>
12#include <asm/mach-bcm47xx/bcm47xx.h>
13#include <asm/mach-bcm47xx/gpio.h>
14
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]15#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
16static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
17#else
18static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
19#endif
20
21int gpio_request(unsigned gpio, const char *tag)
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200[diff] [blame]22{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]23 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]24#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]25 case BCM47XX_BUS_TYPE_SSB:
26 if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
27 ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
28 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]29
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]30 if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
31 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
32 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]33
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]34 if (test_and_set_bit(gpio, gpio_in_use))
35 return -EBUSY;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]36
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]37 return 0;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]38#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +0200[diff] [blame^]39#ifdef CONFIG_BCM47XX_BCMA
40 case BCM47XX_BUS_TYPE_BCMA:
41 if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
42 return -EINVAL;
43
44 if (test_and_set_bit(gpio, gpio_in_use))
45 return -EBUSY;
46
47 return 0;
48#endif
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]49 }
50 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]51}
52EXPORT_SYMBOL(gpio_request);
53
54void gpio_free(unsigned gpio)
55{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]56 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]57#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]58 case BCM47XX_BUS_TYPE_SSB:
59 if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
60 ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
61 return;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]62
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]63 if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
64 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
65 return;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]66
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]67 clear_bit(gpio, gpio_in_use);
68 return;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]69#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +0200[diff] [blame^]70#ifdef CONFIG_BCM47XX_BCMA
71 case BCM47XX_BUS_TYPE_BCMA:
72 if (gpio >= BCM47XX_CHIPCO_GPIO_LINES)
73 return;
74
75 clear_bit(gpio, gpio_in_use);
76 return;
77#endif
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]78 }
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]79}
80EXPORT_SYMBOL(gpio_free);
81
82int gpio_to_irq(unsigned gpio)
83{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]84 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]85#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]86 case BCM47XX_BUS_TYPE_SSB:
87 if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco))
88 return ssb_mips_irq(bcm47xx_bus.ssb.chipco.dev) + 2;
89 else if (ssb_extif_available(&bcm47xx_bus.ssb.extif))
90 return ssb_mips_irq(bcm47xx_bus.ssb.extif.dev) + 2;
91 else
92 return -EINVAL;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +0200[diff] [blame]93#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +0200[diff] [blame^]94#ifdef CONFIG_BCM47XX_BCMA
95 case BCM47XX_BUS_TYPE_BCMA:
96 return bcma_core_mips_irq(bcm47xx_bus.bcma.bus.drv_cc.core) + 2;
97#endif
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +0200[diff] [blame]98 }
99 return -EINVAL;
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200[diff] [blame]100}
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200[diff] [blame]101EXPORT_SYMBOL_GPL(gpio_to_irq);