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/export.h>
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
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)
23{
24	switch (bcm47xx_bus_type) {
25#ifdef CONFIG_BCM47XX_SSB
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;
30
31		if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
32		    ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
33			return -EINVAL;
34
35		if (test_and_set_bit(gpio, gpio_in_use))
36			return -EBUSY;
37
38		return 0;
39#endif
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
50	}
51	return -EINVAL;
52}
53EXPORT_SYMBOL(gpio_request);
54
55void gpio_free(unsigned gpio)
56{
57	switch (bcm47xx_bus_type) {
58#ifdef CONFIG_BCM47XX_SSB
59	case BCM47XX_BUS_TYPE_SSB:
60		if (ssb_chipco_available(&bcm47xx_bus.ssb.chipco) &&
61		    ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
62			return;
63
64		if (ssb_extif_available(&bcm47xx_bus.ssb.extif) &&
65		    ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
66			return;
67
68		clear_bit(gpio, gpio_in_use);
69		return;
70#endif
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
79	}
80}
81EXPORT_SYMBOL(gpio_free);
82
83int gpio_to_irq(unsigned gpio)
84{
85	switch (bcm47xx_bus_type) {
86#ifdef CONFIG_BCM47XX_SSB
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;
94#endif
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
99	}
100	return -EINVAL;
101}
102EXPORT_SYMBOL_GPL(gpio_to_irq);
103