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Aurelien Jarno34cc6622007-09-25 15:42:09 +02001/*
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 -04009#include <linux/export.h>
Aurelien Jarno34cc6622007-09-25 15:42:09 +020010#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 +020016#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 +020023{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020024 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +020025#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020026 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 +020030
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020031 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 +020034
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020035 if (test_and_set_bit(gpio, gpio_in_use))
36 return -EBUSY;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +020037
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020038 return 0;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +020039#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +020040#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 +020050 }
51 return -EINVAL;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +020052}
53EXPORT_SYMBOL(gpio_request);
54
55void gpio_free(unsigned gpio)
56{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020057 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +020058#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020059 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 +020063
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020064 if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
65 ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
66 return;
Aurelien Jarnob06f3e12008-10-14 11:44:26 +020067
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020068 clear_bit(gpio, gpio_in_use);
69 return;
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +020070#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +020071#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 +020079 }
Aurelien Jarnob06f3e12008-10-14 11:44:26 +020080}
81EXPORT_SYMBOL(gpio_free);
82
83int gpio_to_irq(unsigned gpio)
84{
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020085 switch (bcm47xx_bus_type) {
Hauke Mehrtensa656ffc2011-07-23 01:20:13 +020086#ifdef CONFIG_BCM47XX_SSB
Hauke Mehrtens08ccf5722011-07-23 01:20:12 +020087 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 +020094#endif
Hauke Mehrtensc1d1c5d2011-07-23 01:20:14 +020095#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 +020099 }
100 return -EINVAL;
Aurelien Jarno34cc6622007-09-25 15:42:09 +0200101}
Aurelien Jarnob06f3e12008-10-14 11:44:26 +0200102EXPORT_SYMBOL_GPL(gpio_to_irq);