1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/*
* Sharp SL-C7xx Series PCMCIA routines
*
* Copyright (c) 2004-2005 Richard Purdie
*
* Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/hardware/scoop.h>
#include <asm/arch/corgi.h>
#include <asm/arch/pxa-regs.h>
#include "soc_common.h"
#define NO_KEEP_VS 0x0001
static unsigned char keep_vs;
static unsigned char keep_rd;
static struct pcmcia_irqs irqs[] = {
{ 0, CORGI_IRQ_GPIO_CF_CD, "PCMCIA0 CD"},
};
static void sharpsl_pcmcia_init_reset(void)
{
reset_scoop(&corgiscoop_device.dev);
keep_vs = NO_KEEP_VS;
keep_rd = 0;
}
static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
int ret;
/*
* Setup default state of GPIO outputs
* before we enable them as outputs.
*/
GPSR(GPIO48_nPOE) =
GPIO_bit(GPIO48_nPOE) |
GPIO_bit(GPIO49_nPWE) |
GPIO_bit(GPIO50_nPIOR) |
GPIO_bit(GPIO51_nPIOW) |
GPIO_bit(GPIO52_nPCE_1) |
GPIO_bit(GPIO53_nPCE_2);
pxa_gpio_mode(GPIO48_nPOE_MD);
pxa_gpio_mode(GPIO49_nPWE_MD);
pxa_gpio_mode(GPIO50_nPIOR_MD);
pxa_gpio_mode(GPIO51_nPIOW_MD);
pxa_gpio_mode(GPIO52_nPCE_1_MD);
pxa_gpio_mode(GPIO53_nPCE_2_MD);
pxa_gpio_mode(GPIO54_pSKTSEL_MD);
pxa_gpio_mode(GPIO55_nPREG_MD);
pxa_gpio_mode(GPIO56_nPWAIT_MD);
pxa_gpio_mode(GPIO57_nIOIS16_MD);
/* Register interrupts */
ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
if (ret) {
printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
return ret;
}
/* Enable interrupt */
write_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR, 0x00C0);
write_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR, 0x0101);
keep_vs = NO_KEEP_VS;
skt->irq = CORGI_IRQ_GPIO_CF_IRQ;
return 0;
}
static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
/* CF_BUS_OFF */
sharpsl_pcmcia_init_reset();
}
static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
unsigned short cpr, csr;
cpr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR);
write_scoop_reg(&corgiscoop_device.dev, SCOOP_IRM, 0x00FF);
write_scoop_reg(&corgiscoop_device.dev, SCOOP_ISR, 0x0000);
write_scoop_reg(&corgiscoop_device.dev, SCOOP_IRM, 0x0000);
csr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CSR);
if (csr & 0x0004) {
/* card eject */
write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000);
keep_vs = NO_KEEP_VS;
}
else if (!(keep_vs & NO_KEEP_VS)) {
/* keep vs1,vs2 */
write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000);
csr |= keep_vs;
}
else if (cpr & 0x0003) {
/* power on */
write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000);
keep_vs = (csr & 0x00C0);
}
else {
/* card detect */
write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0002);
}
state->detect = (csr & 0x0004) ? 0 : 1;
state->ready = (csr & 0x0002) ? 1 : 0;
state->bvd1 = (csr & 0x0010) ? 1 : 0;
state->bvd2 = (csr & 0x0020) ? 1 : 0;
state->wrprot = (csr & 0x0008) ? 1 : 0;
state->vs_3v = (csr & 0x0040) ? 0 : 1;
state->vs_Xv = (csr & 0x0080) ? 0 : 1;
if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
}
}
static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
unsigned long flags;
unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
switch (state->Vcc) {
case 0: break;
case 33: break;
case 50: break;
default:
printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
return -1;
}
if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
return -1;
}
local_irq_save(flags);
nmcr = (mcr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR)) & ~0x0010;
ncpr = (cpr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR)) & ~0x0083;
nccr = (ccr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CCR)) & ~0x0080;
nimr = (imr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR)) & ~0x003E;
ncpr |= (state->Vcc == 33) ? 0x0001 :
(state->Vcc == 50) ? 0x0002 : 0;
nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
nccr |= (state->flags&SS_RESET)? 0x0080: 0;
nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
((skt->status&SS_READY) ? 0x0002 : 0)|
((skt->status&SS_BATDEAD)? 0x0010 : 0)|
((skt->status&SS_BATWARN)? 0x0020 : 0)|
((skt->status&SS_STSCHG) ? 0x0010 : 0)|
((skt->status&SS_WRPROT) ? 0x0008 : 0);
if (!(ncpr & 0x0003)) {
keep_rd = 0;
} else if (!keep_rd) {
if (nccr & 0x0080)
keep_rd = 1;
else
nccr |= 0x0080;
}
if (mcr != nmcr)
write_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR, nmcr);
if (cpr != ncpr)
write_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR, ncpr);
if (ccr != nccr)
write_scoop_reg(&corgiscoop_device.dev, SCOOP_CCR, nccr);
if (imr != nimr)
write_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR, nimr);
local_irq_restore(flags);
return 0;
}
static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
}
static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
}
static struct pcmcia_low_level sharpsl_pcmcia_ops = {
.owner = THIS_MODULE,
.hw_init = sharpsl_pcmcia_hw_init,
.hw_shutdown = sharpsl_pcmcia_hw_shutdown,
.socket_state = sharpsl_pcmcia_socket_state,
.configure_socket = sharpsl_pcmcia_configure_socket,
.socket_init = sharpsl_pcmcia_socket_init,
.socket_suspend = sharpsl_pcmcia_socket_suspend,
.first = 0,
.nr = 1,
};
static struct platform_device *sharpsl_pcmcia_device;
static int __init sharpsl_pcmcia_init(void)
{
int ret;
sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL);
if (!sharpsl_pcmcia_device)
return -ENOMEM;
memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device));
sharpsl_pcmcia_device->name = "pxa2xx-pcmcia";
sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
ret = platform_device_register(sharpsl_pcmcia_device);
if (ret)
kfree(sharpsl_pcmcia_device);
return ret;
}
static void __exit sharpsl_pcmcia_exit(void)
{
/*
* This call is supposed to free our sharpsl_pcmcia_device.
* Unfortunately platform_device don't have a free method, and
* we can't assume it's free of any reference at this point so we
* can't free it either.
*/
platform_device_unregister(sharpsl_pcmcia_device);
}
module_init(sharpsl_pcmcia_init);
module_exit(sharpsl_pcmcia_exit);
MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
MODULE_LICENSE("GPL");
|
