[CPUFREQ] Fix -Wshadow warning in conservative governor.
[linux-2.6.git] / drivers / pcmcia / au1000_pb1x00.c
1 /*
2  *
3  * Alchemy Semi Pb1x00 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/tqueue.h>
30 #include <linux/timer.h>
31 #include <linux/mm.h>
32 #include <linux/proc_fs.h>
33 #include <linux/types.h>
34
35 #include <pcmcia/cs_types.h>
36 #include <pcmcia/cs.h>
37 #include <pcmcia/ss.h>
38 #include <pcmcia/cistpl.h>
39 #include <pcmcia/bus_ops.h>
40 #include "cs_internal.h"
41
42 #include <asm/io.h>
43 #include <asm/irq.h>
44 #include <asm/system.h>
45
46 #include <asm/au1000.h>
47 #include <asm/au1000_pcmcia.h>
48
49 #define debug(fmt, arg...) do { } while (0)
50
51 #ifdef CONFIG_MIPS_PB1000
52 #include <asm/pb1000.h>
53 #define PCMCIA_IRQ AU1000_GPIO_15
54 #elif defined (CONFIG_MIPS_PB1500)
55 #include <asm/pb1500.h>
56 #define PCMCIA_IRQ AU1500_GPIO_203
57 #elif defined (CONFIG_MIPS_PB1100)
58 #include <asm/pb1100.h>
59 #define PCMCIA_IRQ AU1000_GPIO_11
60 #endif
61
62 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
63 {
64 #ifdef CONFIG_MIPS_PB1000
65         u16 pcr;
66         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
67
68         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
69         au_sync_delay(100);
70         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
71         au_sync();
72
73         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
74         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
75         au_writel(pcr, PB1000_PCR);
76         au_sync_delay(20);
77           
78         return PCMCIA_NUM_SOCKS;
79
80 #else /* fixme -- take care of the Pb1500 at some point */
81
82         u16 pcr;
83         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
84         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
85         au_writew(pcr, PCMCIA_BOARD_REG);
86         au_sync_delay(500);
87         return PCMCIA_NUM_SOCKS;
88 #endif
89 }
90
91 static int pb1x00_pcmcia_shutdown(void)
92 {
93 #ifdef CONFIG_MIPS_PB1000
94         u16 pcr;
95         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
96         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
97         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
98         au_writel(pcr, PB1000_PCR);
99         au_sync_delay(20);
100         return 0;
101 #else
102         u16 pcr;
103         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
104         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
105         au_writew(pcr, PCMCIA_BOARD_REG);
106         au_sync_delay(2);
107         return 0;
108 #endif
109 }
110
111 static int 
112 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
113 {
114         u32 inserted0, inserted1;
115         u16 vs0, vs1;
116
117 #ifdef CONFIG_MIPS_PB1000
118         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
119         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
120         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
121         vs0 = (vs0 >> 4) & 0x3;
122         vs1 = (vs1 >> 12) & 0x3;
123 #else
124         vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
125 #ifdef CONFIG_MIPS_PB1500
126         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
127 #else /* Pb1100 */
128         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
129 #endif
130         inserted1 = 0;
131 #endif
132
133         state->ready = 0;
134         state->vs_Xv = 0;
135         state->vs_3v = 0;
136         state->detect = 0;
137
138         if (sock == 0) {
139                 if (inserted0) {
140                         switch (vs0) {
141                                 case 0:
142                                 case 2:
143                                         state->vs_3v=1;
144                                         break;
145                                 case 3: /* 5V */
146                                         break;
147                                 default:
148                                         /* return without setting 'detect' */
149                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
150                                                         vs0);
151                                         return 0;
152                         }
153                         state->detect = 1;
154                 }
155         }
156         else  {
157                 if (inserted1) {
158                         switch (vs1) {
159                                 case 0:
160                                 case 2:
161                                         state->vs_3v=1;
162                                         break;
163                                 case 3: /* 5V */
164                                         break;
165                                 default:
166                                         /* return without setting 'detect' */
167                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
168                                                         vs1);
169                                         return 0;
170                         }
171                         state->detect = 1;
172                 }
173         }
174
175         if (state->detect) {
176                 state->ready = 1;
177         }
178
179         state->bvd1=1;
180         state->bvd2=1;
181         state->wrprot=0; 
182         return 1;
183 }
184
185
186 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
187 {
188
189         if(info->sock > PCMCIA_MAX_SOCK) return -1;
190
191         /*
192          * Even in the case of the Pb1000, both sockets are connected
193          * to the same irq line.
194          */
195         info->irq = PCMCIA_IRQ;
196
197         return 0;
198 }
199
200
201 static int 
202 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
203 {
204         u16 pcr;
205
206         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
207
208 #ifdef CONFIG_MIPS_PB1000
209         pcr = au_readl(PB1000_PCR);
210
211         if (configure->sock == 0) {
212                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 | 
213                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
214         }
215         else  {
216                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 | 
217                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
218         }
219
220         pcr &= ~PCR_SLOT_0_RST;
221         debug("Vcc %dV Vpp %dV, pcr %x\n", 
222                         configure->vcc, configure->vpp, pcr);
223         switch(configure->vcc){
224                 case 0:  /* Vcc 0 */
225                         switch(configure->vpp) {
226                                 case 0:
227                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
228                                                         configure->sock);
229                                         break;
230                                 case 12:
231                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
232                                                         configure->sock);
233                                         break;
234                                 case 50:
235                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
236                                                         configure->sock);
237                                         break;
238                                 case 33:
239                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
240                                                         configure->sock);
241                                         break;
242                                 default:
243                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
244                                                         configure->sock);
245                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
246                                                         __func__,
247                                                         configure->vcc, 
248                                                         configure->vpp);
249                                         break;
250                         }
251                         break;
252                 case 50: /* Vcc 5V */
253                         switch(configure->vpp) {
254                                 case 0:
255                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
256                                                         configure->sock);
257                                         break;
258                                 case 50:
259                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
260                                                         configure->sock);
261                                         break;
262                                 case 12:
263                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
264                                                         configure->sock);
265                                         break;
266                                 case 33:
267                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
268                                                         configure->sock);
269                                         break;
270                                 default:
271                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
272                                                         configure->sock);
273                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
274                                                         __func__,
275                                                         configure->vcc, 
276                                                         configure->vpp);
277                                         break;
278                         }
279                         break;
280                 case 33: /* Vcc 3.3V */
281                         switch(configure->vpp) {
282                                 case 0:
283                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
284                                                         configure->sock);
285                                         break;
286                                 case 50:
287                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
288                                                         configure->sock);
289                                         break;
290                                 case 12:
291                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
292                                                         configure->sock);
293                                         break;
294                                 case 33:
295                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
296                                                         configure->sock);
297                                         break;
298                                 default:
299                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
300                                                         configure->sock);
301                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
302                                                         __func__,
303                                                         configure->vcc, 
304                                                         configure->vpp);
305                                         break;
306                         }
307                         break;
308                 default: /* what's this ? */
309                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
310                         printk(KERN_ERR "%s: bad Vcc %d\n", 
311                                         __func__, configure->vcc);
312                         break;
313         }
314
315         if (configure->sock == 0) {
316         pcr &= ~(PCR_SLOT_0_RST);
317                 if (configure->reset)
318                 pcr |= PCR_SLOT_0_RST;
319         }
320         else {
321                 pcr &= ~(PCR_SLOT_1_RST);
322                 if (configure->reset)
323                         pcr |= PCR_SLOT_1_RST;
324         }
325         au_writel(pcr, PB1000_PCR);
326         au_sync_delay(300);
327
328 #else
329
330         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
331
332         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n", 
333                         configure->vcc, configure->vpp, pcr, configure->reset);
334
335
336         switch(configure->vcc){
337                 case 0:  /* Vcc 0 */
338                         pcr |= SET_VCC_VPP(0,0);
339                         break;
340                 case 50: /* Vcc 5V */
341                         switch(configure->vpp) {
342                                 case 0:
343                                         pcr |= SET_VCC_VPP(2,0);
344                                         break;
345                                 case 50:
346                                         pcr |= SET_VCC_VPP(2,1);
347                                         break;
348                                 case 12:
349                                         pcr |= SET_VCC_VPP(2,2);
350                                         break;
351                                 case 33:
352                                 default:
353                                         pcr |= SET_VCC_VPP(0,0);
354                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
355                                                         __func__,
356                                                         configure->vcc, 
357                                                         configure->vpp);
358                                         break;
359                         }
360                         break;
361                 case 33: /* Vcc 3.3V */
362                         switch(configure->vpp) {
363                                 case 0:
364                                         pcr |= SET_VCC_VPP(1,0);
365                                         break;
366                                 case 12:
367                                         pcr |= SET_VCC_VPP(1,2);
368                                         break;
369                                 case 33:
370                                         pcr |= SET_VCC_VPP(1,1);
371                                         break;
372                                 case 50:
373                                 default:
374                                         pcr |= SET_VCC_VPP(0,0);
375                                         printk("%s: bad Vcc/Vpp (%d:%d)\n", 
376                                                         __func__,
377                                                         configure->vcc, 
378                                                         configure->vpp);
379                                         break;
380                         }
381                         break;
382                 default: /* what's this ? */
383                         pcr |= SET_VCC_VPP(0,0);
384                         printk(KERN_ERR "%s: bad Vcc %d\n", 
385                                         __func__, configure->vcc);
386                         break;
387         }
388
389         au_writew(pcr, PCMCIA_BOARD_REG);
390         au_sync_delay(300);
391
392         if (!configure->reset) {
393                 pcr |= PC_DRV_EN;
394                 au_writew(pcr, PCMCIA_BOARD_REG);
395                 au_sync_delay(100);
396                 pcr |= PC_DEASSERT_RST;
397                 au_writew(pcr, PCMCIA_BOARD_REG);
398                 au_sync_delay(100);
399         }
400         else {
401                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
402                 au_writew(pcr, PCMCIA_BOARD_REG);
403                 au_sync_delay(100);
404         }
405 #endif
406         return 0;
407 }
408
409
410 struct pcmcia_low_level pb1x00_pcmcia_ops = { 
411         pb1x00_pcmcia_init,
412         pb1x00_pcmcia_shutdown,
413         pb1x00_pcmcia_socket_state,
414         pb1x00_pcmcia_get_irq_info,
415         pb1x00_pcmcia_configure_socket
416 };