File: pxa2xx_sharpsl.c

package info (click to toggle)
linux 4.19.20-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 954,852 kB
  • sloc: ansic: 16,749,828; asm: 271,286; makefile: 38,257; sh: 32,808; perl: 27,671; python: 21,022; cpp: 5,063; yacc: 4,648; lex: 2,585; awk: 1,385; ruby: 25; sed: 5
file content (262 lines) | stat: -rw-r--r-- 7,191 bytes parent folder | download | duplicates (30)
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
/*
 * 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/platform_device.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/hardware/scoop.h>

#include "soc_common.h"

#define	NO_KEEP_VS 0x0001
#define SCOOP_DEV platform_scoop_config->devs

static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
{
	struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];

	reset_scoop(scoopdev->dev);

	/* Shared power controls need to be handled carefully */
	if (platform_scoop_config->power_ctrl)
		platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
	else
		write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);

	scoopdev->keep_vs = NO_KEEP_VS;
	scoopdev->keep_rd = 0;
}

static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
		skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
		skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
	}

	skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;

	return 0;
}

static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				    struct pcmcia_state *state)
{
	unsigned short cpr, csr;
	struct device *scoop = SCOOP_DEV[skt->nr].dev;

	cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);

	write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
	write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
	write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
	csr = read_scoop_reg(scoop, SCOOP_CSR);
	if (csr & 0x0004) {
		/* card eject */
		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
		SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
	}
	else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
		/* keep vs1,vs2 */
		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
		csr |= SCOOP_DEV[skt->nr].keep_vs;
	}
	else if (cpr & 0x0003) {
		/* power on */
		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
		SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
	}
	else {
		/* card detect */
	        if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
	                write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
	        } else {
		        write_scoop_reg(scoop, 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;
	struct device *scoop = SCOOP_DEV[skt->nr].dev;

	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(scoop, SCOOP_MCR)) & ~0x0010;
	ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
	nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
	nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;

	if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
	        ncpr |= (state->Vcc == 33) ? 0x0002 :
		        (state->Vcc == 50) ? 0x0002 : 0;
	} else {
	        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)) {
		SCOOP_DEV[skt->nr].keep_rd = 0;
	} else if (!SCOOP_DEV[skt->nr].keep_rd) {
		if (nccr & 0x0080)
			SCOOP_DEV[skt->nr].keep_rd = 1;
		else
			nccr |= 0x0080;
	}

	if (mcr != nmcr)
		write_scoop_reg(scoop, SCOOP_MCR, nmcr);
	if (cpr != ncpr) {
		if (platform_scoop_config->power_ctrl)
			platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
		else
		        write_scoop_reg(scoop, SCOOP_CPR, ncpr);
	}
	if (ccr != nccr)
		write_scoop_reg(scoop, SCOOP_CCR, nccr);
	if (imr != nimr)
		write_scoop_reg(scoop, SCOOP_IMR, nimr);

	local_irq_restore(flags);

	return 0;
}

static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
	sharpsl_pcmcia_init_reset(skt);

	/* Enable interrupt */
	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
	write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
	SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
}

static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
	sharpsl_pcmcia_init_reset(skt);
}

static struct pcmcia_low_level sharpsl_pcmcia_ops = {
	.owner                  = THIS_MODULE,
	.hw_init                = sharpsl_pcmcia_hw_init,
	.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                     = 0,
};

#ifdef CONFIG_SA1100_COLLIE
#include "sa11xx_base.h"

int pcmcia_collie_init(struct device *dev)
{
       int ret = -ENODEV;

       if (machine_is_collie())
               ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);

       return ret;
}

#else

static struct platform_device *sharpsl_pcmcia_device;

static int __init sharpsl_pcmcia_init(void)
{
	int ret;

	if (!platform_scoop_config)
		return -ENODEV;

	sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
	sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

	if (!sharpsl_pcmcia_device)
		return -ENOMEM;

	ret = platform_device_add_data(sharpsl_pcmcia_device,
			&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
	if (ret == 0) {
		sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
		ret = platform_device_add(sharpsl_pcmcia_device);
	}

	if (ret)
		platform_device_put(sharpsl_pcmcia_device);

	return ret;
}

static void __exit sharpsl_pcmcia_exit(void)
{
	platform_device_unregister(sharpsl_pcmcia_device);
}

fs_initcall(sharpsl_pcmcia_init);
module_exit(sharpsl_pcmcia_exit);
#endif

MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");