1/*
2 * drivers/pcmcia/sa1100_assabet.c
3 *
4 * PCMCIA implementation routines for Assabet
5 *
6 */
7#include <linux/module.h>
8#include <linux/kernel.h>
9#include <linux/errno.h>
10#include <linux/interrupt.h>
11#include <linux/device.h>
12#include <linux/init.h>
13
14#include <asm/hardware.h>
15#include <asm/mach-types.h>
16#include <asm/irq.h>
17#include <asm/signal.h>
18#include <asm/arch/assabet.h>
19
20#include "sa1100_generic.h"
21
22static struct pcmcia_irqs irqs[] = {
23	{ 1, ASSABET_IRQ_GPIO_CF_CD,   "CF CD"   },
24	{ 1, ASSABET_IRQ_GPIO_CF_BVD2, "CF BVD2" },
25	{ 1, ASSABET_IRQ_GPIO_CF_BVD1, "CF BVD1" },
26};
27
28static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
29{
30	skt->irq = ASSABET_IRQ_GPIO_CF_IRQ;
31
32	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
33}
34
35/*
36 * Release all resources.
37 */
38static void assabet_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
39{
40	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
41}
42
43static void
44assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
45{
46	unsigned long levels = GPLR;
47
48	state->detect = (levels & ASSABET_GPIO_CF_CD) ? 0 : 1;
49	state->ready  = (levels & ASSABET_GPIO_CF_IRQ) ? 1 : 0;
50	state->bvd1   = (levels & ASSABET_GPIO_CF_BVD1) ? 1 : 0;
51	state->bvd2   = (levels & ASSABET_GPIO_CF_BVD2) ? 1 : 0;
52	state->wrprot = 0; /* Not available on Assabet. */
53	state->vs_3v  = 1; /* Can only apply 3.3V on Assabet. */
54	state->vs_Xv  = 0;
55}
56
57static int
58assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
59{
60	unsigned int mask;
61
62	switch (state->Vcc) {
63	case 0:
64		mask = 0;
65		break;
66
67	case 50:
68		printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
69			__FUNCTION__);
70
71	case 33:  /* Can only apply 3.3V to the CF slot. */
72		mask = ASSABET_BCR_CF_PWR;
73		break;
74
75	default:
76		printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
77			state->Vcc);
78		return -1;
79	}
80
81	/* Silently ignore Vpp, output enable, speaker enable. */
82
83	if (state->flags & SS_RESET)
84		mask |= ASSABET_BCR_CF_RST;
85
86	ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR, mask);
87
88	return 0;
89}
90
91/*
92 * Enable card status IRQs on (re-)initialisation.  This can
93 * be called at initialisation, power management event, or
94 * pcmcia event.
95 */
96static void assabet_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
97{
98	/*
99	 * Enable CF bus
100	 */
101	ASSABET_BCR_clear(ASSABET_BCR_CF_BUS_OFF);
102
103	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
104}
105
106/*
107 * Disable card status IRQs on suspend.
108 */
109static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
110{
111	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
112
113	/*
114	 * Tristate the CF bus signals.  Also assert CF
115	 * reset as per user guide page 4-11.
116	 */
117	ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
118}
119
120static struct pcmcia_low_level assabet_pcmcia_ops = {
121	.owner			= THIS_MODULE,
122
123	.hw_init		= assabet_pcmcia_hw_init,
124	.hw_shutdown		= assabet_pcmcia_hw_shutdown,
125
126	.socket_state		= assabet_pcmcia_socket_state,
127	.configure_socket	= assabet_pcmcia_configure_socket,
128
129	.socket_init		= assabet_pcmcia_socket_init,
130	.socket_suspend		= assabet_pcmcia_socket_suspend,
131};
132
133int __init pcmcia_assabet_init(struct device *dev)
134{
135	int ret = -ENODEV;
136
137	if (machine_is_assabet() && !machine_has_neponset())
138		ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
139
140	return ret;
141}
142