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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Sharp SL-C7xx Series PCMCIA routines
3 *
4 * Copyright (c) 2004-2005 Richard Purdie
5 *
6 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/interrupt.h>
19#include <linux/device.h>
20
21#include <asm/hardware.h>
22#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <asm/hardware/scoop.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <asm/arch/pxa-regs.h>
25
26#include "soc_common.h"
27
28#define NO_KEEP_VS 0x0001
29
Richard Purdie0ce76252005-09-05 20:49:54 +010030static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031{
Richard Purdie0ce76252005-09-05 20:49:54 +010032 reset_scoop(scoopdev->dev);
33 scoopdev->keep_vs = NO_KEEP_VS;
34 scoopdev->keep_rd = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035}
36
37static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
38{
39 int ret;
40
41 /*
42 * Setup default state of GPIO outputs
43 * before we enable them as outputs.
44 */
45 GPSR(GPIO48_nPOE) =
46 GPIO_bit(GPIO48_nPOE) |
47 GPIO_bit(GPIO49_nPWE) |
48 GPIO_bit(GPIO50_nPIOR) |
49 GPIO_bit(GPIO51_nPIOW) |
50 GPIO_bit(GPIO52_nPCE_1) |
51 GPIO_bit(GPIO53_nPCE_2);
52
53 pxa_gpio_mode(GPIO48_nPOE_MD);
54 pxa_gpio_mode(GPIO49_nPWE_MD);
55 pxa_gpio_mode(GPIO50_nPIOR_MD);
56 pxa_gpio_mode(GPIO51_nPIOW_MD);
57 pxa_gpio_mode(GPIO52_nPCE_1_MD);
58 pxa_gpio_mode(GPIO53_nPCE_2_MD);
59 pxa_gpio_mode(GPIO54_pSKTSEL_MD);
60 pxa_gpio_mode(GPIO55_nPREG_MD);
61 pxa_gpio_mode(GPIO56_nPWAIT_MD);
62 pxa_gpio_mode(GPIO57_nIOIS16_MD);
63
64 /* Register interrupts */
Richard Purdie0ce76252005-09-05 20:49:54 +010065 if (scoop_devs[skt->nr].cd_irq >= 0) {
66 struct pcmcia_irqs cd_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Richard Purdie0ce76252005-09-05 20:49:54 +010068 cd_irq.sock = skt->nr;
69 cd_irq.irq = scoop_devs[skt->nr].cd_irq;
70 cd_irq.str = scoop_devs[skt->nr].cd_irq_str;
71 ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1);
72
73 if (ret) {
74 printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
75 return ret;
76 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 }
78
Richard Purdie0ce76252005-09-05 20:49:54 +010079 skt->irq = scoop_devs[skt->nr].irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
81 return 0;
82}
83
84static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
85{
Richard Purdie0ce76252005-09-05 20:49:54 +010086 if (scoop_devs[skt->nr].cd_irq >= 0) {
87 struct pcmcia_irqs cd_irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Richard Purdie0ce76252005-09-05 20:49:54 +010089 cd_irq.sock = skt->nr;
90 cd_irq.irq = scoop_devs[skt->nr].cd_irq;
91 cd_irq.str = scoop_devs[skt->nr].cd_irq_str;
92 soc_pcmcia_free_irqs(skt, &cd_irq, 1);
93 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070094}
95
96
97static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
98 struct pcmcia_state *state)
99{
100 unsigned short cpr, csr;
Richard Purdie0ce76252005-09-05 20:49:54 +0100101 struct device *scoop = scoop_devs[skt->nr].dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Richard Purdie0ce76252005-09-05 20:49:54 +0100103 cpr = read_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Richard Purdie0ce76252005-09-05 20:49:54 +0100105 write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
106 write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
107 write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
108 csr = read_scoop_reg(scoop, SCOOP_CSR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 if (csr & 0x0004) {
110 /* card eject */
Richard Purdie0ce76252005-09-05 20:49:54 +0100111 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
112 scoop_devs[skt->nr].keep_vs = NO_KEEP_VS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 }
Richard Purdie0ce76252005-09-05 20:49:54 +0100114 else if (!(scoop_devs[skt->nr].keep_vs & NO_KEEP_VS)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 /* keep vs1,vs2 */
Richard Purdie0ce76252005-09-05 20:49:54 +0100116 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
117 csr |= scoop_devs[skt->nr].keep_vs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 }
119 else if (cpr & 0x0003) {
120 /* power on */
Richard Purdie0ce76252005-09-05 20:49:54 +0100121 write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
122 scoop_devs[skt->nr].keep_vs = (csr & 0x00C0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
124 else {
125 /* card detect */
Richard Purdie0ce76252005-09-05 20:49:54 +0100126 write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 }
128
129 state->detect = (csr & 0x0004) ? 0 : 1;
130 state->ready = (csr & 0x0002) ? 1 : 0;
131 state->bvd1 = (csr & 0x0010) ? 1 : 0;
132 state->bvd2 = (csr & 0x0020) ? 1 : 0;
133 state->wrprot = (csr & 0x0008) ? 1 : 0;
134 state->vs_3v = (csr & 0x0040) ? 0 : 1;
135 state->vs_Xv = (csr & 0x0080) ? 0 : 1;
136
137 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
138 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
139 }
140
141}
142
143
144static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
145 const socket_state_t *state)
146{
147 unsigned long flags;
Richard Purdie0ce76252005-09-05 20:49:54 +0100148 struct device *scoop = scoop_devs[skt->nr].dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
151
152 switch (state->Vcc) {
153 case 0: break;
154 case 33: break;
155 case 50: break;
156 default:
157 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
158 return -1;
159 }
160
161 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
162 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
163 return -1;
164 }
165
166 local_irq_save(flags);
167
Richard Purdie0ce76252005-09-05 20:49:54 +0100168 nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
169 ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
170 nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
171 nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 ncpr |= (state->Vcc == 33) ? 0x0001 :
174 (state->Vcc == 50) ? 0x0002 : 0;
175 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
176 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
177 nccr |= (state->flags&SS_RESET)? 0x0080: 0;
178 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
179 ((skt->status&SS_READY) ? 0x0002 : 0)|
180 ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
181 ((skt->status&SS_BATWARN)? 0x0020 : 0)|
182 ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
183 ((skt->status&SS_WRPROT) ? 0x0008 : 0);
184
185 if (!(ncpr & 0x0003)) {
Richard Purdie0ce76252005-09-05 20:49:54 +0100186 scoop_devs[skt->nr].keep_rd = 0;
187 } else if (!scoop_devs[skt->nr].keep_rd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 if (nccr & 0x0080)
Richard Purdie0ce76252005-09-05 20:49:54 +0100189 scoop_devs[skt->nr].keep_rd = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 else
191 nccr |= 0x0080;
192 }
193
194 if (mcr != nmcr)
Richard Purdie0ce76252005-09-05 20:49:54 +0100195 write_scoop_reg(scoop, SCOOP_MCR, nmcr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 if (cpr != ncpr)
Richard Purdie0ce76252005-09-05 20:49:54 +0100197 write_scoop_reg(scoop, SCOOP_CPR, ncpr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 if (ccr != nccr)
Richard Purdie0ce76252005-09-05 20:49:54 +0100199 write_scoop_reg(scoop, SCOOP_CCR, nccr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 if (imr != nimr)
Richard Purdie0ce76252005-09-05 20:49:54 +0100201 write_scoop_reg(scoop, SCOOP_IMR, nimr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 local_irq_restore(flags);
204
205 return 0;
206}
207
208static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
209{
Richard Purdie0ce76252005-09-05 20:49:54 +0100210 sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]);
211
212 /* Enable interrupt */
213 write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_IMR, 0x00C0);
214 write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_MCR, 0x0101);
215 scoop_devs[skt->nr].keep_vs = NO_KEEP_VS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
218static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
219{
Richard Purdie0ce76252005-09-05 20:49:54 +0100220 /* CF_BUS_OFF */
221 sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
223
224static struct pcmcia_low_level sharpsl_pcmcia_ops = {
225 .owner = THIS_MODULE,
226 .hw_init = sharpsl_pcmcia_hw_init,
227 .hw_shutdown = sharpsl_pcmcia_hw_shutdown,
228 .socket_state = sharpsl_pcmcia_socket_state,
229 .configure_socket = sharpsl_pcmcia_configure_socket,
230 .socket_init = sharpsl_pcmcia_socket_init,
231 .socket_suspend = sharpsl_pcmcia_socket_suspend,
232 .first = 0,
Richard Purdie0ce76252005-09-05 20:49:54 +0100233 .nr = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234};
235
236static struct platform_device *sharpsl_pcmcia_device;
237
238static int __init sharpsl_pcmcia_init(void)
239{
240 int ret;
241
Richard Purdie0ce76252005-09-05 20:49:54 +0100242 sharpsl_pcmcia_ops.nr=scoop_num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL);
244 if (!sharpsl_pcmcia_device)
245 return -ENOMEM;
Richard Purdie0ce76252005-09-05 20:49:54 +0100246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device));
248 sharpsl_pcmcia_device->name = "pxa2xx-pcmcia";
249 sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
Richard Purdie0ce76252005-09-05 20:49:54 +0100250 sharpsl_pcmcia_device->dev.parent=scoop_devs[0].dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252 ret = platform_device_register(sharpsl_pcmcia_device);
253 if (ret)
254 kfree(sharpsl_pcmcia_device);
255
256 return ret;
257}
258
259static void __exit sharpsl_pcmcia_exit(void)
260{
261 /*
262 * This call is supposed to free our sharpsl_pcmcia_device.
263 * Unfortunately platform_device don't have a free method, and
264 * we can't assume it's free of any reference at this point so we
265 * can't free it either.
266 */
267 platform_device_unregister(sharpsl_pcmcia_device);
268}
269
Richard Purdief36598ae2005-09-03 19:39:25 +0100270fs_initcall(sharpsl_pcmcia_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271module_exit(sharpsl_pcmcia_exit);
272
273MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
274MODULE_LICENSE("GPL");