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 #include <asm/mach-db1x00/db1x00.h>
44
45 #include "au1000_generic.h"
46
47 #if 0
48 #define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
49 #else
50 #define debug(x,args...)
51 #endif
52
53 static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
54
55 struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS];
56 extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int);
57
58 static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt)
59 {
60 #ifdef CONFIG_MIPS_DB1550
61 skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3;
62 #else
63 skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2;
64 #endif
65 return 0;
66 }
67
68 static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt)
69 {
70 bcsr->pcmcia = 0; /* turn off power */
71 au_sync_delay(2);
72 }
73
74 static void
75 db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state)
76 {
77 u32 inserted;
78 unsigned char vs;
79
80 state->ready = 0;
81 state->vs_Xv = 0;
82 state->vs_3v = 0;
83 state->detect = 0;
84
85 switch (skt->nr) {
86 case 0:
87 vs = bcsr->status & 0x3;
88 inserted = !(bcsr->status & (1<<4));
89 break;
90 case 1:
91 vs = (bcsr->status & 0xC)>>2;
92 inserted = !(bcsr->status & (1<<5));
93 break;
94 default:/* should never happen */
95 return;
96 }
97
98 if (inserted)
99 debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n",
100 skt->nr, inserted, vs, bcsr->pcmcia);
101
102 if (inserted) {
103 switch (vs) {
104 case 0:
105 case 2:
106 state->vs_3v=1;
107 break;
108 case 3: /* 5V */
109 break;
110 default:
111 /* return without setting 'detect' */
112 printk(KERN_ERR "db1x00 bad VS (%d)\n",
113 vs);
114 }
115 state->detect = 1;
116 state->ready = 1;
117 }
118 else {
119 /* if the card was previously inserted and then ejected,
120 * we should turn off power to it
121 */
122 if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) {
123 bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST |
124 BCSR_PCMCIA_PC0DRVEN |
125 BCSR_PCMCIA_PC0VPP |
126 BCSR_PCMCIA_PC0VCC);
127 au_sync_delay(10);
128 }
129 else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) {
130 bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST |
131 BCSR_PCMCIA_PC1DRVEN |
132 BCSR_PCMCIA_PC1VPP |
133 BCSR_PCMCIA_PC1VCC);
134 au_sync_delay(10);
135 }
136 }
137
138 state->bvd1=1;
139 state->bvd2=1;
140 state->wrprot=0;
141 }
142
143 static int
144 db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state)
145 {
146 u16 pwr;
147 int sock = skt->nr;
148
149 debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n",
150 sock, state->Vcc, state->Vpp,
151 state->flags & SS_RESET);
152
153 /* pcmcia reg was set to zero at init time. Be careful when
154 * initializing a socket not to wipe out the settings of the
155 * other socket.
156 */
157 pwr = bcsr->pcmcia;
158 pwr &= ~(0xf << sock*8); /* clear voltage settings */
159
160 state->Vpp = 0;
161 switch(state->Vcc){
162 case 0: /* Vcc 0 */
163 pwr |= SET_VCC_VPP(0,0,sock);
164 break;
165 case 50: /* Vcc 5V */
166 switch(state->Vpp) {
167 case 0:
168 pwr |= SET_VCC_VPP(2,0,sock);
169 break;
170 case 50:
171 pwr |= SET_VCC_VPP(2,1,sock);
172 break;
173 case 12:
174 pwr |= SET_VCC_VPP(2,2,sock);
175 break;
176 case 33:
177 default:
178 pwr |= SET_VCC_VPP(0,0,sock);
179 printk("%s: bad Vcc/Vpp (%d:%d)\n",
180 __FUNCTION__,
181 state->Vcc,
182 state->Vpp);
183 break;
184 }
185 break;
186 case 33: /* Vcc 3.3V */
187 switch(state->Vpp) {
188 case 0:
189 pwr |= SET_VCC_VPP(1,0,sock);
190 break;
191 case 12:
192 pwr |= SET_VCC_VPP(1,2,sock);
193 break;
194 case 33:
195 pwr |= SET_VCC_VPP(1,1,sock);
196 break;
197 case 50:
198 default:
199 pwr |= SET_VCC_VPP(0,0,sock);
200 printk("%s: bad Vcc/Vpp (%d:%d)\n",
201 __FUNCTION__,
202 state->Vcc,
203 state->Vpp);
204 break;
205 }
206 break;
207 default: /* what's this ? */
208 pwr |= SET_VCC_VPP(0,0,sock);
209 printk(KERN_ERR "%s: bad Vcc %d\n",
210 __FUNCTION__, state->Vcc);
211 break;
212 }
213
214 bcsr->pcmcia = pwr;
215 au_sync_delay(300);
216
217 if (sock == 0) {
218 if (!(state->flags & SS_RESET)) {
219 pwr |= BCSR_PCMCIA_PC0DRVEN;
220 bcsr->pcmcia = pwr;
221 au_sync_delay(300);
222 pwr |= BCSR_PCMCIA_PC0RST;
223 bcsr->pcmcia = pwr;
224 au_sync_delay(100);
225 }
226 else {
227 pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
228 bcsr->pcmcia = pwr;
229 au_sync_delay(100);
230 }
231 }
232 else {
233 if (!(state->flags & SS_RESET)) {
234 pwr |= BCSR_PCMCIA_PC1DRVEN;
235 bcsr->pcmcia = pwr;
236 au_sync_delay(300);
237 pwr |= BCSR_PCMCIA_PC1RST;
238 bcsr->pcmcia = pwr;
239 au_sync_delay(100);
240 }
241 else {
242 pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
243 bcsr->pcmcia = pwr;
244 au_sync_delay(100);
245 }
246 }
247 return 0;
248 }
249
250 /*
251 * Enable card status IRQs on (re-)initialisation. This can
252 * be called at initialisation, power management event, or
253 * pcmcia event.
254 */
255 void db1x00_socket_init(struct au1000_pcmcia_socket *skt)
256 {
257 /* nothing to do for now */
258 }
259
260 /*
261 * Disable card status IRQs and PCMCIA bus on suspend.
262 */
263 void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt)
264 {
265 /* nothing to do for now */
266 }
267
268 struct pcmcia_low_level db1x00_pcmcia_ops = {
269 .owner = THIS_MODULE,
270
271 .hw_init = db1x00_pcmcia_hw_init,
272 .hw_shutdown = db1x00_pcmcia_shutdown,
273
274 .socket_state = db1x00_pcmcia_socket_state,
275 .configure_socket = db1x00_pcmcia_configure_socket,
276
277 .socket_init = db1x00_socket_init,
278 .socket_suspend = db1x00_socket_suspend
279 };
280
281 int __init au1x_board_init(struct device *dev)
282 {
283 int ret = -ENODEV;
284 bcsr->pcmcia = 0; /* turn off power, if it's not already off */
285 au_sync_delay(2);
286 ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
287 return ret;
288 }
289
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