1/*
2 * drivers/pcmcia/sa1100_simpad.c
3 *
4 * PCMCIA implementation routines for simpad
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/irq.h>
15#include <asm/arch/simpad.h>
16#include "sa1100_generic.h"
17
18extern long get_cs3_shadow(void);
19extern void set_cs3_bit(int value);
20extern void clear_cs3_bit(int value);
21
22static struct pcmcia_irqs irqs[] = {
23	{ 1, IRQ_GPIO_CF_CD, "CF_CD" },
24};
25
26static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
27{
28
29	clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
30
31	skt->irq = IRQ_GPIO_CF_IRQ;
32
33	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
34}
35
36static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
37{
38	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
39
40	/* Disable CF bus: */
41	//set_cs3_bit(PCMCIA_BUFF_DIS);
42	clear_cs3_bit(PCMCIA_RESET);
43}
44
45static void
46simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
47			   struct pcmcia_state *state)
48{
49	unsigned long levels = GPLR;
50	long cs3reg = get_cs3_shadow();
51
52	state->detect=((levels & GPIO_CF_CD)==0)?1:0;
53	state->ready=(levels & GPIO_CF_IRQ)?1:0;
54	state->bvd1=1; /* Not available on Simpad. */
55	state->bvd2=1; /* Not available on Simpad. */
56	state->wrprot=0; /* Not available on Simpad. */
57
58	if((cs3reg & 0x0c) == 0x0c) {
59		state->vs_3v=0;
60		state->vs_Xv=0;
61	} else {
62		state->vs_3v=1;
63		state->vs_Xv=0;
64	}
65}
66
67static int
68simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
69			       const socket_state_t *state)
70{
71	unsigned long flags;
72
73	local_irq_save(flags);
74
75	/* Murphy: see table of MIC2562a-1 */
76	switch (state->Vcc) {
77	case 0:
78		clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
79		break;
80
81	case 33:
82		clear_cs3_bit(VCC_3V_EN|EN1);
83		set_cs3_bit(VCC_5V_EN|EN0);
84		break;
85
86	case 50:
87		clear_cs3_bit(VCC_5V_EN|EN1);
88		set_cs3_bit(VCC_3V_EN|EN0);
89		break;
90
91	default:
92		printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
93			__FUNCTION__, state->Vcc);
94		clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
95		local_irq_restore(flags);
96		return -1;
97	}
98
99
100	local_irq_restore(flags);
101
102	return 0;
103}
104
105static void simpad_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
106{
107	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
108}
109
110static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
111{
112	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
113	set_cs3_bit(PCMCIA_RESET);
114}
115
116static struct pcmcia_low_level simpad_pcmcia_ops = {
117	.owner			= THIS_MODULE,
118	.hw_init		= simpad_pcmcia_hw_init,
119	.hw_shutdown		= simpad_pcmcia_hw_shutdown,
120	.socket_state		= simpad_pcmcia_socket_state,
121	.configure_socket	= simpad_pcmcia_configure_socket,
122	.socket_init		= simpad_pcmcia_socket_init,
123	.socket_suspend		= simpad_pcmcia_socket_suspend,
124};
125
126int __init pcmcia_simpad_init(struct device *dev)
127{
128	int ret = -ENODEV;
129
130	if (machine_is_simpad())
131		ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
132
133	return ret;
134}
135