Root/drivers/pcmcia/sa1100_assabet.c

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 <mach/hardware.h>
15#include <asm/mach-types.h>
16#include <asm/irq.h>
17#include <asm/signal.h>
18#include <mach/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->socket.pci_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            __func__);
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", __func__,
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 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

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