1/*
2 * drivers/pcmcia/sa1100_h3600.c
3 *
4 * PCMCIA implementation routines for H3600
5 *
6 */
7#include <linux/module.h>
8#include <linux/kernel.h>
9#include <linux/device.h>
10#include <linux/interrupt.h>
11#include <linux/init.h>
12#include <linux/delay.h>
13#include <linux/gpio.h>
14
15#include <mach/hardware.h>
16#include <asm/irq.h>
17#include <asm/mach-types.h>
18#include <mach/h3xxx.h>
19
20#include "sa1100_generic.h"
21
22static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
23{
24	int err;
25
26	switch (skt->nr) {
27	case 0:
28		skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD0;
29		skt->stat[SOC_STAT_CD].name = "PCMCIA CD0";
30		skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ0;
31		skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ0";
32
33		err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
34		if (err)
35			goto err01;
36		err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
37		if (err)
38			goto err03;
39		err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
40		if (err)
41			goto err03;
42		err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
43		if (err)
44			goto err04;
45		err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
46		if (err)
47			goto err04;
48		err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
49		if (err)
50			goto err05;
51		err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
52		if (err)
53			goto err05;
54		err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
55		if (err)
56			goto err06;
57		break;
58	case 1:
59		skt->stat[SOC_STAT_CD].gpio = H3XXX_GPIO_PCMCIA_CD1;
60		skt->stat[SOC_STAT_CD].name = "PCMCIA CD1";
61		skt->stat[SOC_STAT_RDY].gpio = H3XXX_GPIO_PCMCIA_IRQ1;
62		skt->stat[SOC_STAT_RDY].name = "PCMCIA IRQ1";
63		break;
64	}
65	return 0;
66
67err06:	gpio_free(H3XXX_EGPIO_CARD_RESET);
68err05:	gpio_free(H3XXX_EGPIO_OPT_RESET);
69err04:	gpio_free(H3XXX_EGPIO_OPT_ON);
70err03:	gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
71err01:	gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
72	return err;
73}
74
75static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
76{
77	switch (skt->nr) {
78	case 0:
79		/* Disable CF bus: */
80		gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
81		gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
82		gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
83
84		gpio_free(H3XXX_EGPIO_CARD_RESET);
85		gpio_free(H3XXX_EGPIO_OPT_RESET);
86		gpio_free(H3XXX_EGPIO_OPT_ON);
87		gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
88		break;
89	case 1:
90		break;
91	}
92}
93
94static void
95h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
96{
97	state->bvd1 = 0;
98	state->bvd2 = 0;
99	state->vs_3v = 0;
100	state->vs_Xv = 0;
101}
102
103static int
104h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
105{
106	if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
107		printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
108		       state->Vcc / 10, state->Vcc % 10);
109		return -1;
110	}
111
112	gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));
113
114	/* Silently ignore Vpp, output enable, speaker enable. */
115
116	return 0;
117}
118
119static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
120{
121	/* Enable CF bus: */
122	gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
123	gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
124	gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);
125
126	msleep(10);
127}
128
129static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
130{
131	/*
132	 * FIXME:  This doesn't fit well.  We don't have the mechanism in
133	 * the generic PCMCIA layer to deal with the idea of two sockets
134	 * on one bus.  We rely on the cs.c behaviour shutting down
135	 * socket 0 then socket 1.
136	 */
137	if (skt->nr == 1) {
138		gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
139		gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
140		/* hmm, does this suck power? */
141		gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
142	}
143}
144
145struct pcmcia_low_level h3600_pcmcia_ops = {
146	.owner			= THIS_MODULE,
147	.hw_init		= h3600_pcmcia_hw_init,
148	.hw_shutdown		= h3600_pcmcia_hw_shutdown,
149	.socket_state		= h3600_pcmcia_socket_state,
150	.configure_socket	= h3600_pcmcia_configure_socket,
151
152	.socket_init		= h3600_pcmcia_socket_init,
153	.socket_suspend		= h3600_pcmcia_socket_suspend,
154};
155
156int pcmcia_h3600_init(struct device *dev)
157{
158	int ret = -ENODEV;
159
160	if (machine_is_h3600() || machine_is_h3100())
161		ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
162
163	return ret;
164}
165