Root/drivers/pcmcia/sa1100_shannon.c

1/*
2 * drivers/pcmcia/sa1100_shannon.c
3 *
4 * PCMCIA implementation routines for Shannon
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 <mach/hardware.h>
13#include <asm/mach-types.h>
14#include <mach/shannon.h>
15#include <asm/irq.h>
16#include "sa1100_generic.h"
17
18static struct pcmcia_irqs irqs[] = {
19    { 0, SHANNON_IRQ_GPIO_EJECT_0, "PCMCIA_CD_0" },
20    { 1, SHANNON_IRQ_GPIO_EJECT_1, "PCMCIA_CD_1" },
21};
22
23static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
24{
25    /* All those are inputs */
26    GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
27          SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
28    GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
29          SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
30
31    skt->socket.pci_irq = skt->nr ? SHANNON_IRQ_GPIO_RDY_1 : SHANNON_IRQ_GPIO_RDY_0;
32
33    return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
34}
35
36static void shannon_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
37{
38    soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
39}
40
41static void
42shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
43                struct pcmcia_state *state)
44{
45    unsigned long levels = GPLR;
46
47    switch (skt->nr) {
48    case 0:
49        state->detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
50        state->ready = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
51        state->wrprot = 0; /* Not available on Shannon. */
52        state->bvd1 = 1;
53        state->bvd2 = 1;
54        state->vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */
55        state->vs_Xv = 0;
56        break;
57
58    case 1:
59        state->detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
60        state->ready = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
61        state->wrprot = 0; /* Not available on Shannon. */
62        state->bvd1 = 1;
63        state->bvd2 = 1;
64        state->vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */
65        state->vs_Xv = 0;
66        break;
67    }
68}
69
70static int
71shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
72                const socket_state_t *state)
73{
74    switch (state->Vcc) {
75    case 0: /* power off */
76        printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __func__);
77        break;
78    case 50:
79        printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V..\n", __func__);
80    case 33:
81        break;
82    default:
83        printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
84               __func__, state->Vcc);
85        return -1;
86    }
87
88    printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __func__);
89    
90    /* Silently ignore Vpp, output enable, speaker enable. */
91
92    return 0;
93}
94
95static void shannon_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
96{
97    soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
98}
99
100static void shannon_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
101{
102    soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
103}
104
105static struct pcmcia_low_level shannon_pcmcia_ops = {
106    .owner = THIS_MODULE,
107    .hw_init = shannon_pcmcia_hw_init,
108    .hw_shutdown = shannon_pcmcia_hw_shutdown,
109    .socket_state = shannon_pcmcia_socket_state,
110    .configure_socket = shannon_pcmcia_configure_socket,
111
112    .socket_init = shannon_pcmcia_socket_init,
113    .socket_suspend = shannon_pcmcia_socket_suspend,
114};
115
116int __init pcmcia_shannon_init(struct device *dev)
117{
118    int ret = -ENODEV;
119
120    if (machine_is_shannon())
121        ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);
122
123    return ret;
124}
125

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