1/*
2 * drivers/pcmcia/sa1100_shannon.c
3 *
4 * PCMCIA implementation routines for Shannon
5 *
6 */
7#include <linux/module.h>
8#include <linux/kernel.h>
9#include <linux/device.h>
10#include <linux/init.h>
11
12#include <asm/hardware.h>
13#include <asm/mach-types.h>
14#include <asm/arch/shannon.h>
15#include <asm/irq.h>
16#include "sa1100_generic.h"
17
18static struct pcmcia_irqs irqs[] = {
19	{ 0, SHANNON_IRQ_GPIO_EJECT_0, "PCMCIA_CD_0" },
20	{ 1, SHANNON_IRQ_GPIO_EJECT_1, "PCMCIA_CD_1" },
21};
22
23static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
24{
25	/* All those are inputs */
26	GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
27		  SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
28	GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
29		  SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
30
31	skt->irq = skt->nr ? SHANNON_IRQ_GPIO_RDY_1 : SHANNON_IRQ_GPIO_RDY_0;
32
33	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
34}
35
36static void shannon_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
37{
38	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
39}
40
41static void
42shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
43			    struct pcmcia_state *state)
44{
45	unsigned long levels = GPLR;
46
47	switch (skt->nr) {
48	case 0:
49		state->detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
50		state->ready  = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
51		state->wrprot = 0; /* Not available on Shannon. */
52		state->bvd1   = 1;
53		state->bvd2   = 1;
54		state->vs_3v  = 1;
55		state->vs_Xv  = 0;
56		break;
57
58	case 1:
59		state->detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
60		state->ready  = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
61		state->wrprot = 0; /* Not available on Shannon. */
62		state->bvd1   = 1;
63		state->bvd2   = 1;
64		state->vs_3v  = 1;
65		state->vs_Xv  = 0;
66		break;
67	}
68}
69
70static int
71shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
72				const socket_state_t *state)
73{
74	switch (state->Vcc) {
75	case 0:	/* power off */
76		printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __FUNCTION__);
77		break;
78	case 50:
79		printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __FUNCTION__);
80	case 33:
81		break;
82	default:
83		printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
84		       __FUNCTION__, state->Vcc);
85		return -1;
86	}
87
88	printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __FUNCTION__);
89
90	/* Silently ignore Vpp, output enable, speaker enable. */
91
92	return 0;
93}
94
95static void shannon_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
96{
97	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
98}
99
100static void shannon_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
101{
102	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
103}
104
105static struct pcmcia_low_level shannon_pcmcia_ops = {
106	.owner			= THIS_MODULE,
107	.hw_init		= shannon_pcmcia_hw_init,
108	.hw_shutdown		= shannon_pcmcia_hw_shutdown,
109	.socket_state		= shannon_pcmcia_socket_state,
110	.configure_socket	= shannon_pcmcia_configure_socket,
111
112	.socket_init		= shannon_pcmcia_socket_init,
113	.socket_suspend		= shannon_pcmcia_socket_suspend,
114};
115
116int __init pcmcia_shannon_init(struct device *dev)
117{
118	int ret = -ENODEV;
119
120	if (machine_is_shannon())
121		ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);
122
123	return ret;
124}
125