tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 *
3 * Alchemy Semi Db1x00 boards specific pcmcia routines.
4 *
5 * Copyright 2002 MontaVista Software Inc.
6 * Author: MontaVista Software, Inc.
7 * ppopov@mvista.com or source@mvista.com
8 *
9 * Copyright 2004 Pete Popov, updated the driver to 2.6.
10 * Followed the sa11xx API and largely copied many of the hardware
11 * independent functions.
12 *
13 * ########################################################################
14 *
15 * This program is free software; you can distribute it and/or modify it
16 * under the terms of the GNU General Public License (Version 2) as
17 * published by the Free Software Foundation.
18 *
19 * This program is distributed in the hope it will be useful, but WITHOUT
20 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * for more details.
23 *
24 * You should have received a copy of the GNU General Public License along
25 * with this program; if not, write to the Free Software Foundation, Inc.,
26 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
27 *
28 * ########################################################################
29 *
30 *
31 */
32
33#include <linux/module.h>
34#include <linux/kernel.h>
35#include <linux/errno.h>
36#include <linux/interrupt.h>
37#include <linux/device.h>
38#include <linux/init.h>
39
40#include <asm/irq.h>
41#include <asm/signal.h>
42#include <asm/mach-au1x00/au1000.h>
43
44#if defined(CONFIG_MIPS_DB1200)
45 #include <db1200.h>
46#elif defined(CONFIG_MIPS_PB1200)
47 #include <pb1200.h>
48#else
49 #include <asm/mach-db1x00/db1x00.h>
50 static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
51#endif
52
53#include "au1000_generic.h"
54
55#if 0
56#define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
57#else
58#define debug(x,args...)
59#endif
60
61
62struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS];
63extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int);
64
65static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt)
66{
67#ifdef CONFIG_MIPS_DB1550
68 skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3;
69#elif defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
70 skt->irq = skt->nr ? BOARD_PC1_INT : BOARD_PC0_INT;
71#else
72 skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2;
73#endif
74 return 0;
75}
76
77static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt)
78{
79 bcsr->pcmcia = 0; /* turn off power */
80 au_sync_delay(2);
81}
82
83static void
84db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state)
85{
86 u32 inserted;
87 unsigned char vs;
88
89 state->ready = 0;
90 state->vs_Xv = 0;
91 state->vs_3v = 0;
92 state->detect = 0;
93
94 switch (skt->nr) {
95 case 0:
96 vs = bcsr->status & 0x3;
97#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
98 inserted = BOARD_CARD_INSERTED(0);
99#else
100 inserted = !(bcsr->status & (1<<4));
101#endif
102 break;
103 case 1:
104 vs = (bcsr->status & 0xC)>>2;
105#if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
106 inserted = BOARD_CARD_INSERTED(1);
107#else
108 inserted = !(bcsr->status & (1<<5));
109#endif
110 break;
111 default:/* should never happen */
112 return;
113 }
114
115 if (inserted)
116 debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n",
117 skt->nr, inserted, vs, bcsr->pcmcia);
118
119 if (inserted) {
120 switch (vs) {
121 case 0:
122 case 2:
123 state->vs_3v=1;
124 break;
125 case 3: /* 5V */
126 break;
127 default:
128 /* return without setting 'detect' */
129 printk(KERN_ERR "db1x00 bad VS (%d)\n",
130 vs);
131 }
132 state->detect = 1;
133 state->ready = 1;
134 }
135 else {
136 /* if the card was previously inserted and then ejected,
137 * we should turn off power to it
138 */
139 if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) {
140 bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST |
141 BCSR_PCMCIA_PC0DRVEN |
142 BCSR_PCMCIA_PC0VPP |
143 BCSR_PCMCIA_PC0VCC);
144 au_sync_delay(10);
145 }
146 else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) {
147 bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST |
148 BCSR_PCMCIA_PC1DRVEN |
149 BCSR_PCMCIA_PC1VPP |
150 BCSR_PCMCIA_PC1VCC);
151 au_sync_delay(10);
152 }
153 }
154
155 state->bvd1=1;
156 state->bvd2=1;
157 state->wrprot=0;
158}
159
160static int
161db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state)
162{
163 u16 pwr;
164 int sock = skt->nr;
165
166 debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n",
167 sock, state->Vcc, state->Vpp,
168 state->flags & SS_RESET);
169
170 /* pcmcia reg was set to zero at init time. Be careful when
171 * initializing a socket not to wipe out the settings of the
172 * other socket.
173 */
174 pwr = bcsr->pcmcia;
175 pwr &= ~(0xf << sock*8); /* clear voltage settings */
176
177 state->Vpp = 0;
178 switch(state->Vcc){
179 case 0: /* Vcc 0 */
180 pwr |= SET_VCC_VPP(0,0,sock);
181 break;
182 case 50: /* Vcc 5V */
183 switch(state->Vpp) {
184 case 0:
185 pwr |= SET_VCC_VPP(2,0,sock);
186 break;
187 case 50:
188 pwr |= SET_VCC_VPP(2,1,sock);
189 break;
190 case 12:
191 pwr |= SET_VCC_VPP(2,2,sock);
192 break;
193 case 33:
194 default:
195 pwr |= SET_VCC_VPP(0,0,sock);
196 printk("%s: bad Vcc/Vpp (%d:%d)\n",
197 __func__,
198 state->Vcc,
199 state->Vpp);
200 break;
201 }
202 break;
203 case 33: /* Vcc 3.3V */
204 switch(state->Vpp) {
205 case 0:
206 pwr |= SET_VCC_VPP(1,0,sock);
207 break;
208 case 12:
209 pwr |= SET_VCC_VPP(1,2,sock);
210 break;
211 case 33:
212 pwr |= SET_VCC_VPP(1,1,sock);
213 break;
214 case 50:
215 default:
216 pwr |= SET_VCC_VPP(0,0,sock);
217 printk("%s: bad Vcc/Vpp (%d:%d)\n",
218 __func__,
219 state->Vcc,
220 state->Vpp);
221 break;
222 }
223 break;
224 default: /* what's this ? */
225 pwr |= SET_VCC_VPP(0,0,sock);
226 printk(KERN_ERR "%s: bad Vcc %d\n",
227 __func__, state->Vcc);
228 break;
229 }
230
231 bcsr->pcmcia = pwr;
232 au_sync_delay(300);
233
234 if (sock == 0) {
235 if (!(state->flags & SS_RESET)) {
236 pwr |= BCSR_PCMCIA_PC0DRVEN;
237 bcsr->pcmcia = pwr;
238 au_sync_delay(300);
239 pwr |= BCSR_PCMCIA_PC0RST;
240 bcsr->pcmcia = pwr;
241 au_sync_delay(100);
242 }
243 else {
244 pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
245 bcsr->pcmcia = pwr;
246 au_sync_delay(100);
247 }
248 }
249 else {
250 if (!(state->flags & SS_RESET)) {
251 pwr |= BCSR_PCMCIA_PC1DRVEN;
252 bcsr->pcmcia = pwr;
253 au_sync_delay(300);
254 pwr |= BCSR_PCMCIA_PC1RST;
255 bcsr->pcmcia = pwr;
256 au_sync_delay(100);
257 }
258 else {
259 pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
260 bcsr->pcmcia = pwr;
261 au_sync_delay(100);
262 }
263 }
264 return 0;
265}
266
267/*
268 * Enable card status IRQs on (re-)initialisation. This can
269 * be called at initialisation, power management event, or
270 * pcmcia event.
271 */
272void db1x00_socket_init(struct au1000_pcmcia_socket *skt)
273{
274 /* nothing to do for now */
275}
276
277/*
278 * Disable card status IRQs and PCMCIA bus on suspend.
279 */
280void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt)
281{
282 /* nothing to do for now */
283}
284
285struct pcmcia_low_level db1x00_pcmcia_ops = {
286 .owner = THIS_MODULE,
287
288 .hw_init = db1x00_pcmcia_hw_init,
289 .hw_shutdown = db1x00_pcmcia_shutdown,
290
291 .socket_state = db1x00_pcmcia_socket_state,
292 .configure_socket = db1x00_pcmcia_configure_socket,
293
294 .socket_init = db1x00_socket_init,
295 .socket_suspend = db1x00_socket_suspend
296};
297
298int au1x_board_init(struct device *dev)
299{
300 int ret = -ENODEV;
301 bcsr->pcmcia = 0; /* turn off power, if it's not already off */
302 au_sync_delay(2);
303 ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
304 return ret;
305}