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#include <linux/gpio.h>
14
15#include <asm/mach-types.h>
16#include <mach/assabet.h>
17
18#include "sa1100_generic.h"
19
20static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
21{
22	skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
23	skt->stat[SOC_STAT_CD].name = "CF CD";
24	skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
25	skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
26	skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
27	skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
28	skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
29	skt->stat[SOC_STAT_RDY].name = "CF RDY";
30
31	return 0;
32}
33
34static void
35assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
36{
37	state->vs_3v  = 1; /* Can only apply 3.3V on Assabet. */
38	state->vs_Xv  = 0;
39}
40
41static int
42assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
43{
44	unsigned int mask;
45
46	switch (state->Vcc) {
47	case 0:
48		mask = 0;
49		break;
50
51	case 50:
52		printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
53			__func__);
54
55	case 33:  /* Can only apply 3.3V to the CF slot. */
56		mask = ASSABET_BCR_CF_PWR;
57		break;
58
59	default:
60		printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
61			state->Vcc);
62		return -1;
63	}
64
65	/* Silently ignore Vpp, speaker enable. */
66
67	if (state->flags & SS_RESET)
68		mask |= ASSABET_BCR_CF_RST;
69	if (!(state->flags & SS_OUTPUT_ENA))
70		mask |= ASSABET_BCR_CF_BUS_OFF;
71
72	ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
73			ASSABET_BCR_CF_BUS_OFF, mask);
74
75	return 0;
76}
77
78/*
79 * Disable card status IRQs on suspend.
80 */
81static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
82{
83	/*
84	 * Tristate the CF bus signals.  Also assert CF
85	 * reset as per user guide page 4-11.
86	 */
87	ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
88}
89
90static struct pcmcia_low_level assabet_pcmcia_ops = {
91	.owner			= THIS_MODULE,
92	.hw_init		= assabet_pcmcia_hw_init,
93	.socket_state		= assabet_pcmcia_socket_state,
94	.configure_socket	= assabet_pcmcia_configure_socket,
95	.socket_suspend		= assabet_pcmcia_socket_suspend,
96};
97
98int pcmcia_assabet_init(struct device *dev)
99{
100	int ret = -ENODEV;
101
102	if (machine_is_assabet() && !machine_has_neponset())
103		ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
104
105	return ret;
106}
107