pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting
[linux-2.6.git] / drivers / pcmcia / au1000_pb1x00.c
1 /*
2  *
3  * Alchemy Semi Pb1000 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  * ########################################################################
10  *
11  *  This program is free software; you can distribute it and/or modify it
12  *  under the terms of the GNU General Public License (Version 2) as
13  *  published by the Free Software Foundation.
14  *
15  *  This program is distributed in the hope it will be useful, but WITHOUT
16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
18  *  for more details.
19  *
20  *  You should have received a copy of the GNU General Public License along
21  *  with this program; if not, write to the Free Software Foundation, Inc.,
22  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
23  */
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/ioport.h>
28 #include <linux/kernel.h>
29 #include <linux/timer.h>
30 #include <linux/mm.h>
31 #include <linux/proc_fs.h>
32 #include <linux/types.h>
33
34 #include <pcmcia/ss.h>
35 #include <pcmcia/cistpl.h>
36
37 #include <asm/io.h>
38 #include <asm/irq.h>
39 #include <asm/system.h>
40
41 #include <asm/au1000.h>
42 #include <asm/au1000_pcmcia.h>
43
44 #define debug(fmt, arg...) do { } while (0)
45
46 #include <asm/pb1000.h>
47 #define PCMCIA_IRQ AU1000_GPIO_15
48
49 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
50 {
51         u16 pcr;
52         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
53
54         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
55         au_sync_delay(100);
56         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
57         au_sync();
58
59         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
60         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
61         au_writel(pcr, PB1000_PCR);
62         au_sync_delay(20);
63           
64         return PCMCIA_NUM_SOCKS;
65 }
66
67 static int pb1x00_pcmcia_shutdown(void)
68 {
69         u16 pcr;
70         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
71         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
72         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
73         au_writel(pcr, PB1000_PCR);
74         au_sync_delay(20);
75         return 0;
76 }
77
78 static int 
79 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
80 {
81         u32 inserted0, inserted1;
82         u16 vs0, vs1;
83
84         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
85         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
86         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
87         vs0 = (vs0 >> 4) & 0x3;
88         vs1 = (vs1 >> 12) & 0x3;
89
90         state->ready = 0;
91         state->vs_Xv = 0;
92         state->vs_3v = 0;
93         state->detect = 0;
94
95         if (sock == 0) {
96                 if (inserted0) {
97                         switch (vs0) {
98                                 case 0:
99                                 case 2:
100                                         state->vs_3v=1;
101                                         break;
102                                 case 3: /* 5V */
103                                         break;
104                                 default:
105                                         /* return without setting 'detect' */
106                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
107                                                         vs0);
108                                         return 0;
109                         }
110                         state->detect = 1;
111                 }
112         }
113         else  {
114                 if (inserted1) {
115                         switch (vs1) {
116                                 case 0:
117                                 case 2:
118                                         state->vs_3v=1;
119                                         break;
120                                 case 3: /* 5V */
121                                         break;
122                                 default:
123                                         /* return without setting 'detect' */
124                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
125                                                         vs1);
126                                         return 0;
127                         }
128                         state->detect = 1;
129                 }
130         }
131
132         if (state->detect) {
133                 state->ready = 1;
134         }
135
136         state->bvd1=1;
137         state->bvd2=1;
138         state->wrprot=0; 
139         return 1;
140 }
141
142
143 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
144 {
145
146         if(info->sock > PCMCIA_MAX_SOCK) return -1;
147
148         /*
149          * Even in the case of the Pb1000, both sockets are connected
150          * to the same irq line.
151          */
152         info->irq = PCMCIA_IRQ;
153
154         return 0;
155 }
156
157
158 static int 
159 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
160 {
161         u16 pcr;
162
163         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
164
165         pcr = au_readl(PB1000_PCR);
166
167         if (configure->sock == 0) {
168                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 | 
169                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
170         }
171         else  {
172                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 | 
173                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
174         }
175
176         pcr &= ~PCR_SLOT_0_RST;
177         debug("Vcc %dV Vpp %dV, pcr %x\n", 
178                         configure->vcc, configure->vpp, pcr);
179         switch(configure->vcc){
180                 case 0:  /* Vcc 0 */
181                         switch(configure->vpp) {
182                                 case 0:
183                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
184                                                         configure->sock);
185                                         break;
186                                 case 12:
187                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
188                                                         configure->sock);
189                                         break;
190                                 case 50:
191                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
192                                                         configure->sock);
193                                         break;
194                                 case 33:
195                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
196                                                         configure->sock);
197                                         break;
198                                 default:
199                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
200                                                         configure->sock);
201                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
202                                                         __func__,
203                                                         configure->vcc, 
204                                                         configure->vpp);
205                                         break;
206                         }
207                         break;
208                 case 50: /* Vcc 5V */
209                         switch(configure->vpp) {
210                                 case 0:
211                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
212                                                         configure->sock);
213                                         break;
214                                 case 50:
215                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
216                                                         configure->sock);
217                                         break;
218                                 case 12:
219                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
220                                                         configure->sock);
221                                         break;
222                                 case 33:
223                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
224                                                         configure->sock);
225                                         break;
226                                 default:
227                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
228                                                         configure->sock);
229                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
230                                                         __func__,
231                                                         configure->vcc, 
232                                                         configure->vpp);
233                                         break;
234                         }
235                         break;
236                 case 33: /* Vcc 3.3V */
237                         switch(configure->vpp) {
238                                 case 0:
239                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
240                                                         configure->sock);
241                                         break;
242                                 case 50:
243                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
244                                                         configure->sock);
245                                         break;
246                                 case 12:
247                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
248                                                         configure->sock);
249                                         break;
250                                 case 33:
251                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
252                                                         configure->sock);
253                                         break;
254                                 default:
255                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
256                                                         configure->sock);
257                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
258                                                         __func__,
259                                                         configure->vcc, 
260                                                         configure->vpp);
261                                         break;
262                         }
263                         break;
264                 default: /* what's this ? */
265                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
266                         printk(KERN_ERR "%s: bad Vcc %d\n", 
267                                         __func__, configure->vcc);
268                         break;
269         }
270
271         if (configure->sock == 0) {
272         pcr &= ~(PCR_SLOT_0_RST);
273                 if (configure->reset)
274                 pcr |= PCR_SLOT_0_RST;
275         }
276         else {
277                 pcr &= ~(PCR_SLOT_1_RST);
278                 if (configure->reset)
279                         pcr |= PCR_SLOT_1_RST;
280         }
281         au_writel(pcr, PB1000_PCR);
282         au_sync_delay(300);
283
284         return 0;
285 }
286
287
288 struct pcmcia_low_level pb1x00_pcmcia_ops = { 
289         pb1x00_pcmcia_init,
290         pb1x00_pcmcia_shutdown,
291         pb1x00_pcmcia_socket_state,
292         pb1x00_pcmcia_get_irq_info,
293         pb1x00_pcmcia_configure_socket
294 };