sa1100_cerf.c revision be509729356b7433f73df2b9a966674a437fbbc1 
1/*
2 * drivers/pcmcia/sa1100_cerf.c
3 *
4 * PCMCIA implementation routines for CerfBoard
5 * Based off the Assabet.
6 *
7 */
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/device.h>
11#include <linux/init.h>
12#include <linux/delay.h>
13
14#include <asm/arch/hardware.h>
15#include <asm/mach-types.h>
16#include <asm/irq.h>
17#include <asm/arch/cerf.h>
18#include "sa1100_generic.h"
19
20#define CERF_SOCKET	1
21
22static struct pcmcia_irqs irqs[] = {
23	{ CERF_SOCKET, CERF_IRQ_GPIO_CF_CD,   "CF_CD"   },
24	{ CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD2, "CF_BVD2" },
25	{ CERF_SOCKET, CERF_IRQ_GPIO_CF_BVD1, "CF_BVD1" }
26};
27
28static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
29{
30	skt->irq = CERF_IRQ_GPIO_CF_IRQ;
31
32	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
33}
34
35static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
36{
37	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
38}
39
40static void
41cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
42{
43	unsigned long levels = GPLR;
44
45	state->detect	= (levels & CERF_GPIO_CF_CD)  ?0:1;
46	state->ready	= (levels & CERF_GPIO_CF_IRQ) ?1:0;
47	state->bvd1	= (levels & CERF_GPIO_CF_BVD1)?1:0;
48	state->bvd2	= (levels & CERF_GPIO_CF_BVD2)?1:0;
49	state->wrprot	= 0;
50	state->vs_3v	= 1;
51	state->vs_Xv	= 0;
52}
53
54static int
55cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
56			     const socket_state_t *state)
57{
58	switch (state->Vcc) {
59	case 0:
60	case 50:
61	case 33:
62		break;
63
64	default:
65		printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
66			__func__, state->Vcc);
67		return -1;
68	}
69
70	if (state->flags & SS_RESET) {
71		GPSR = CERF_GPIO_CF_RESET;
72	} else {
73		GPCR = CERF_GPIO_CF_RESET;
74	}
75
76	return 0;
77}
78
79static void cerf_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
80{
81	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
82}
83
84static void cerf_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
85{
86	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
87}
88
89static struct pcmcia_low_level cerf_pcmcia_ops = {
90	.owner			= THIS_MODULE,
91	.hw_init		= cerf_pcmcia_hw_init,
92	.hw_shutdown		= cerf_pcmcia_hw_shutdown,
93	.socket_state		= cerf_pcmcia_socket_state,
94	.configure_socket	= cerf_pcmcia_configure_socket,
95
96	.socket_init		= cerf_pcmcia_socket_init,
97	.socket_suspend		= cerf_pcmcia_socket_suspend,
98};
99
100int __init pcmcia_cerf_init(struct device *dev)
101{
102	int ret = -ENODEV;
103
104	if (machine_is_cerf())
105		ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
106
107	return ret;
108}
109