1/*
2 * drivers/pcmcia/sa1100_shannon.c
3 *
4 * PCMCIA implementation routines for Shannon
5 *
6 */
7#include <linux/kernel.h>
8#include <linux/sched.h>
9
10#include <asm/hardware.h>
11#include <asm/arch/shannon.h>
12#include <asm/irq.h>
13#include "sa1100_generic.h"
14
15static int shannon_pcmcia_init(struct pcmcia_init *init)
16{
17	int irq, res;
18
19	/* All those are inputs */
20	GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
21		  SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
22	GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
23		  SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
24
25	/* Set transition detect */
26	set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1, GPIO_NO_EDGES);
27	set_GPIO_IRQ_edge(SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1, GPIO_FALLING_EDGE);
28
29	/* Register interrupts */
30	irq = SHANNON_IRQ_GPIO_EJECT_0;
31	res = request_irq(irq, init->handler, SA_INTERRUPT, "PCMCIA_CD_0", NULL);
32	if (res < 0) goto irq_err;
33	irq = SHANNON_IRQ_GPIO_EJECT_1;
34	res = request_irq(irq, init->handler, SA_INTERRUPT, "PCMCIA_CD_1", NULL);
35	if (res < 0) goto irq_err;
36
37	return 2;
38irq_err:
39	printk(KERN_ERR "%s: Request for IRQ %d failed\n", __FUNCTION__, irq);
40	return -1;
41}
42
43static int shannon_pcmcia_shutdown(void)
44{
45	/* disable IRQs */
46	free_irq(SHANNON_IRQ_GPIO_EJECT_0, NULL);
47	free_irq(SHANNON_IRQ_GPIO_EJECT_1, NULL);
48
49	return 0;
50}
51
52static int shannon_pcmcia_socket_state(struct pcmcia_state_array *state_array)
53{
54	unsigned long levels;
55
56	memset(state_array->state, 0,
57	       state_array->size * sizeof(struct pcmcia_state));
58
59	levels = GPLR;
60
61	state_array->state[0].detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
62	state_array->state[0].ready  = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
63	state_array->state[0].wrprot = 0; /* Not available on Shannon. */
64	state_array->state[0].bvd1 = 1;
65	state_array->state[0].bvd2 = 1;
66	state_array->state[0].vs_3v  = 1;
67	state_array->state[0].vs_Xv  = 0;
68
69	state_array->state[1].detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
70	state_array->state[1].ready  = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
71	state_array->state[1].wrprot = 0; /* Not available on Shannon. */
72	state_array->state[1].bvd1 = 1;
73	state_array->state[1].bvd2 = 1;
74	state_array->state[1].vs_3v  = 1;
75	state_array->state[1].vs_Xv  = 0;
76
77	return 1;
78}
79
80static int shannon_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
81{
82	if (info->sock == 0)
83		info->irq = SHANNON_IRQ_GPIO_RDY_0;
84	else if (info->sock == 1)
85		info->irq = SHANNON_IRQ_GPIO_RDY_1;
86	else return -1;
87
88	return 0;
89}
90
91static int shannon_pcmcia_configure_socket(const struct pcmcia_configure *configure)
92{
93
94	switch (configure->vcc) {
95	case 0:	/* power off */;
96		printk(KERN_WARNING __FUNCTION__"(): CS asked for 0V, still applying 3.3V..\n");
97		break;
98	case 50:
99		printk(KERN_WARNING __FUNCTION__"(): CS asked for 5V, applying 3.3V..\n");
100	case 33:
101		break;
102	default:
103		printk(KERN_ERR __FUNCTION__"(): unrecognized Vcc %u\n",
104		       configure->vcc);
105		return -1;
106	}
107
108	printk(KERN_WARNING __FUNCTION__"(): Warning, Can't perform reset\n");
109
110	/* Silently ignore Vpp, output enable, speaker enable. */
111
112	return 0;
113}
114
115static int shannon_pcmcia_socket_init(int sock)
116{
117	if (sock == 0)
118		set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_0, GPIO_BOTH_EDGES);
119	else if (sock == 1)
120		set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_1, GPIO_BOTH_EDGES);
121
122	return 0;
123}
124
125static int shannon_pcmcia_socket_suspend(int sock)
126{
127	if (sock == 0)
128		set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_0, GPIO_NO_EDGES);
129	else if (sock == 1)
130		set_GPIO_IRQ_edge(SHANNON_GPIO_EJECT_1, GPIO_NO_EDGES);
131
132	return 0;
133}
134
135struct pcmcia_low_level shannon_pcmcia_ops = {
136	init:			shannon_pcmcia_init,
137	shutdown:		shannon_pcmcia_shutdown,
138	socket_state:		shannon_pcmcia_socket_state,
139	get_irq_info:		shannon_pcmcia_get_irq_info,
140	configure_socket:	shannon_pcmcia_configure_socket,
141
142	socket_init:		shannon_pcmcia_socket_init,
143	socket_suspend:		shannon_pcmcia_socket_suspend,
144};
145