1 /*
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>
23
24 #include <asm/hardware/scoop.h>
25 #include <asm/arch/corgi.h>
26 #include <asm/arch/pxa-regs.h>
27
28 #include "soc_common.h"
29
30 #define NO_KEEP_VS 0x0001
31
32 static unsigned char keep_vs;
33 static unsigned char keep_rd;
34
35 static struct pcmcia_irqs irqs[] = {
36 { 0, CORGI_IRQ_GPIO_CF_CD, "PCMCIA0 CD"},
37 };
38
39 static void sharpsl_pcmcia_init_reset(void)
40 {
41 reset_scoop();
42 keep_vs = NO_KEEP_VS;
43 keep_rd = 0;
44 }
45
46 static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
47 {
48 int ret;
49
50 /*
51 * Setup default state of GPIO outputs
52 * before we enable them as outputs.
53 */
54 GPSR(GPIO48_nPOE) =
55 GPIO_bit(GPIO48_nPOE) |
56 GPIO_bit(GPIO49_nPWE) |
57 GPIO_bit(GPIO50_nPIOR) |
58 GPIO_bit(GPIO51_nPIOW) |
59 GPIO_bit(GPIO52_nPCE_1) |
60 GPIO_bit(GPIO53_nPCE_2);
61
62 pxa_gpio_mode(GPIO48_nPOE_MD);
63 pxa_gpio_mode(GPIO49_nPWE_MD);
64 pxa_gpio_mode(GPIO50_nPIOR_MD);
65 pxa_gpio_mode(GPIO51_nPIOW_MD);
66 pxa_gpio_mode(GPIO52_nPCE_1_MD);
67 pxa_gpio_mode(GPIO53_nPCE_2_MD);
68 pxa_gpio_mode(GPIO54_pSKTSEL_MD);
69 pxa_gpio_mode(GPIO55_nPREG_MD);
70 pxa_gpio_mode(GPIO56_nPWAIT_MD);
71 pxa_gpio_mode(GPIO57_nIOIS16_MD);
72
73 /* Register interrupts */
74 ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
75
76 if (ret) {
77 printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
78 return ret;
79 }
80
81 /* Enable interrupt */
82 write_scoop_reg(SCOOP_IMR, 0x00C0);
83 write_scoop_reg(SCOOP_MCR, 0x0101);
84 keep_vs = NO_KEEP_VS;
85
86 skt->irq = CORGI_IRQ_GPIO_CF_IRQ;
87
88 return 0;
89 }
90
91 static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
92 {
93 soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
94
95 /* CF_BUS_OFF */
96 sharpsl_pcmcia_init_reset();
97 }
98
99
100 static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
101 struct pcmcia_state *state)
102 {
103 unsigned short cpr, csr;
104
105 cpr = read_scoop_reg(SCOOP_CPR);
106
107 write_scoop_reg(SCOOP_IRM, 0x00FF);
108 write_scoop_reg(SCOOP_ISR, 0x0000);
109 write_scoop_reg(SCOOP_IRM, 0x0000);
110 csr = read_scoop_reg(SCOOP_CSR);
111 if (csr & 0x0004) {
112 /* card eject */
113 write_scoop_reg(SCOOP_CDR, 0x0000);
114 keep_vs = NO_KEEP_VS;
115 }
116 else if (!(keep_vs & NO_KEEP_VS)) {
117 /* keep vs1,vs2 */
118 write_scoop_reg(SCOOP_CDR, 0x0000);
119 csr |= keep_vs;
120 }
121 else if (cpr & 0x0003) {
122 /* power on */
123 write_scoop_reg(SCOOP_CDR, 0x0000);
124 keep_vs = (csr & 0x00C0);
125 }
126 else {
127 /* card detect */
128 write_scoop_reg(SCOOP_CDR, 0x0002);
129 }
130
131 state->detect = (csr & 0x0004) ? 0 : 1;
132 state->ready = (csr & 0x0002) ? 1 : 0;
133 state->bvd1 = (csr & 0x0010) ? 1 : 0;
134 state->bvd2 = (csr & 0x0020) ? 1 : 0;
135 state->wrprot = (csr & 0x0008) ? 1 : 0;
136 state->vs_3v = (csr & 0x0040) ? 0 : 1;
137 state->vs_Xv = (csr & 0x0080) ? 0 : 1;
138
139 if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
140 printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
141 }
142
143 }
144
145
146 static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
147 const socket_state_t *state)
148 {
149 unsigned long flags;
150
151 unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
152
153 switch (state->Vcc) {
154 case 0: break;
155 case 33: break;
156 case 50: break;
157 default:
158 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
159 return -1;
160 }
161
162 if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
163 printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
164 return -1;
165 }
166
167 local_irq_save(flags);
168
169 nmcr = (mcr = read_scoop_reg(SCOOP_MCR)) & ~0x0010;
170 ncpr = (cpr = read_scoop_reg(SCOOP_CPR)) & ~0x0083;
171 nccr = (ccr = read_scoop_reg(SCOOP_CCR)) & ~0x0080;
172 nimr = (imr = read_scoop_reg(SCOOP_IMR)) & ~0x003E;
173
174 ncpr |= (state->Vcc == 33) ? 0x0001 :
175 (state->Vcc == 50) ? 0x0002 : 0;
176 nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
177 ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
178 nccr |= (state->flags&SS_RESET)? 0x0080: 0;
179 nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
180 ((skt->status&SS_READY) ? 0x0002 : 0)|
181 ((skt->status&SS_BATDEAD)? 0x0010 : 0)|
182 ((skt->status&SS_BATWARN)? 0x0020 : 0)|
183 ((skt->status&SS_STSCHG) ? 0x0010 : 0)|
184 ((skt->status&SS_WRPROT) ? 0x0008 : 0);
185
186 if (!(ncpr & 0x0003)) {
187 keep_rd = 0;
188 } else if (!keep_rd) {
189 if (nccr & 0x0080)
190 keep_rd = 1;
191 else
192 nccr |= 0x0080;
193 }
194
195 if (mcr != nmcr)
196 write_scoop_reg(SCOOP_MCR, nmcr);
197 if (cpr != ncpr)
198 write_scoop_reg(SCOOP_CPR, ncpr);
199 if (ccr != nccr)
200 write_scoop_reg(SCOOP_CCR, nccr);
201 if (imr != nimr)
202 write_scoop_reg(SCOOP_IMR, nimr);
203
204 local_irq_restore(flags);
205
206 return 0;
207 }
208
209 static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
210 {
211 }
212
213 static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
214 {
215 }
216
217 static struct pcmcia_low_level sharpsl_pcmcia_ops = {
218 .owner = THIS_MODULE,
219 .hw_init = sharpsl_pcmcia_hw_init,
220 .hw_shutdown = sharpsl_pcmcia_hw_shutdown,
221 .socket_state = sharpsl_pcmcia_socket_state,
222 .configure_socket = sharpsl_pcmcia_configure_socket,
223 .socket_init = sharpsl_pcmcia_socket_init,
224 .socket_suspend = sharpsl_pcmcia_socket_suspend,
225 .first = 0,
226 .nr = 1,
227 };
228
229 static struct platform_device *sharpsl_pcmcia_device;
230
231 static int __init sharpsl_pcmcia_init(void)
232 {
233 int ret;
234
235 sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL);
236 if (!sharpsl_pcmcia_device)
237 return -ENOMEM;
238 memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device));
239 sharpsl_pcmcia_device->name = "pxa2xx-pcmcia";
240 sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
241
242 ret = platform_device_register(sharpsl_pcmcia_device);
243 if (ret)
244 kfree(sharpsl_pcmcia_device);
245
246 return ret;
247 }
248
249 static void __exit sharpsl_pcmcia_exit(void)
250 {
251 /*
252 * This call is supposed to free our sharpsl_pcmcia_device.
253 * Unfortunately platform_device don't have a free method, and
254 * we can't assume it's free of any reference at this point so we
255 * can't free it either.
256 */
257 platform_device_unregister(sharpsl_pcmcia_device);
258 }
259
260 module_init(sharpsl_pcmcia_init);
261 module_exit(sharpsl_pcmcia_exit);
262
263 MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
264 MODULE_LICENSE("GPL");
265
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