tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/sched.h>
10#include <linux/device.h>
11#include <linux/interrupt.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14
15#include <asm/hardware.h>
16#include <asm/irq.h>
17#include <asm/mach-types.h>
18#include <asm/arch/h3600.h>
19
20#include "sa1100_generic.h"
21
22static struct pcmcia_irqs irqs[] = {
23 { 0, IRQ_GPIO_H3600_PCMCIA_CD0, "PCMCIA CD0" },
24 { 1, IRQ_GPIO_H3600_PCMCIA_CD1, "PCMCIA CD1" }
25};
26
27static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
28{
29 skt->irq = skt->nr ? IRQ_GPIO_H3600_PCMCIA_IRQ1
30 : IRQ_GPIO_H3600_PCMCIA_IRQ0;
31
32
33 return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
34}
35
36static void h3600_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 clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
42 clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
43 set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
44}
45
46static void
47h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
48{
49 unsigned long levels = GPLR;
50
51 switch (skt->nr) {
52 case 0:
53 state->detect = levels & GPIO_H3600_PCMCIA_CD0 ? 0 : 1;
54 state->ready = levels & GPIO_H3600_PCMCIA_IRQ0 ? 1 : 0;
55 state->bvd1 = 0;
56 state->bvd2 = 0;
57 state->wrprot = 0; /* Not available on H3600. */
58 state->vs_3v = 0;
59 state->vs_Xv = 0;
60 break;
61
62 case 1:
63 state->detect = levels & GPIO_H3600_PCMCIA_CD1 ? 0 : 1;
64 state->ready = levels & GPIO_H3600_PCMCIA_IRQ1 ? 1 : 0;
65 state->bvd1 = 0;
66 state->bvd2 = 0;
67 state->wrprot = 0; /* Not available on H3600. */
68 state->vs_3v = 0;
69 state->vs_Xv = 0;
70 break;
71 }
72}
73
74static int
75h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
76{
77 if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
78 printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
79 state->Vcc / 10, state->Vcc % 10);
80 return -1;
81 }
82
83 if (state->flags & SS_RESET)
84 set_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
85 else
86 clr_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
87
88 /* Silently ignore Vpp, output enable, speaker enable. */
89
90 return 0;
91}
92
93static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
94{
95 /* Enable CF bus: */
96 set_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
97 set_h3600_egpio(IPAQ_EGPIO_OPT_ON);
98 clr_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
99
100 msleep(10);
101
102 soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
103}
104
105static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
106{
107 soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
108
109 /*
110 * FIXME: This doesn't fit well. We don't have the mechanism in
111 * the generic PCMCIA layer to deal with the idea of two sockets
112 * on one bus. We rely on the cs.c behaviour shutting down
113 * socket 0 then socket 1.
114 */
115 if (skt->nr == 1) {
116 clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
117 clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
118 /* hmm, does this suck power? */
119 set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
120 }
121}
122
123struct pcmcia_low_level h3600_pcmcia_ops = {
124 .owner = THIS_MODULE,
125 .hw_init = h3600_pcmcia_hw_init,
126 .hw_shutdown = h3600_pcmcia_hw_shutdown,
127 .socket_state = h3600_pcmcia_socket_state,
128 .configure_socket = h3600_pcmcia_configure_socket,
129
130 .socket_init = h3600_pcmcia_socket_init,
131 .socket_suspend = h3600_pcmcia_socket_suspend,
132};
133
134int __init pcmcia_h3600_init(struct device *dev)
135{
136 int ret = -ENODEV;
137
138 if (machine_is_h3600())
139 ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
140
141 return ret;
142}