1 /*
2 * m8xx_pcmcia.c - Linux PCMCIA socket driver for the mpc8xx series.
3 *
4 * (C) 1999-2000 Magnus Damm <damm@opensource.se>
5 * (C) 2001-2002 Montavista Software, Inc.
6 * <mlocke@mvista.com>
7 *
8 * Support for two slots by Cyclades Corporation
9 * <oliver.kurth@cyclades.de>
10 * Further fixes, v2.6 kernel port
11 * <marcelo.tosatti@cyclades.com>
12 *
13 * Some fixes, additions (C) 2005-2007 Montavista Software, Inc.
14 * <vbordug@ru.mvista.com>
15 *
16 * "The ExCA standard specifies that socket controllers should provide
17 * two IO and five memory windows per socket, which can be independently
18 * configured and positioned in the host address space and mapped to
19 * arbitrary segments of card address space. " - David A Hinds. 1999
20 *
21 * This controller does _not_ meet the ExCA standard.
22 *
23 * m8xx pcmcia controller brief info:
24 * + 8 windows (attrib, mem, i/o)
25 * + up to two slots (SLOT_A and SLOT_B)
26 * + inputpins, outputpins, event and mask registers.
27 * - no offset register. sigh.
28 *
29 * Because of the lacking offset register we must map the whole card.
30 * We assign each memory window PCMCIA_MEM_WIN_SIZE address space.
31 * Make sure there is (PCMCIA_MEM_WIN_SIZE * PCMCIA_MEM_WIN_NO
32 * * PCMCIA_SOCKETS_NO) bytes at PCMCIA_MEM_WIN_BASE.
33 * The i/o windows are dynamically allocated at PCMCIA_IO_WIN_BASE.
34 * They are maximum 64KByte each...
35 */
36
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/types.h>
40 #include <linux/fcntl.h>
41 #include <linux/string.h>
42
43 #include <linux/kernel.h>
44 #include <linux/errno.h>
45 #include <linux/slab.h>
46 #include <linux/timer.h>
47 #include <linux/ioport.h>
48 #include <linux/delay.h>
49 #include <linux/interrupt.h>
50 #include <linux/fsl_devices.h>
51 #include <linux/bitops.h>
52 #include <linux/of_device.h>
53 #include <linux/of_platform.h>
54
55 #include <asm/io.h>
56 #include <asm/system.h>
57 #include <asm/time.h>
58 #include <asm/mpc8xx.h>
59 #include <asm/8xx_immap.h>
60 #include <asm/irq.h>
61 #include <asm/fs_pd.h>
62
63 #include <pcmcia/cs_types.h>
64 #include <pcmcia/cs.h>
65 #include <pcmcia/ss.h>
66
67 #ifdef CONFIG_PCMCIA_DEBUG
68 static int pc_debug;
69 module_param(pc_debug, int, 0);
70 #define dprintk(args...) printk(KERN_DEBUG "m8xx_pcmcia: " args);
71 #else
72 #define dprintk(args...)
73 #endif
74
75 #define pcmcia_info(args...) printk(KERN_INFO "m8xx_pcmcia: "args)
76 #define pcmcia_error(args...) printk(KERN_ERR "m8xx_pcmcia: "args)
77
78 static const char *version = "Version 0.06, Aug 2005";
79 MODULE_LICENSE("Dual MPL/GPL");
80
81 #if !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B)
82
83 /* The RPX series use SLOT_B */
84 #if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
85 #define CONFIG_PCMCIA_SLOT_B
86 #define CONFIG_BD_IS_MHZ
87 #endif
88
89 /* The ADS board use SLOT_A */
90 #ifdef CONFIG_ADS
91 #define CONFIG_PCMCIA_SLOT_A
92 #define CONFIG_BD_IS_MHZ
93 #endif
94
95 /* The FADS series are a mess */
96 #ifdef CONFIG_FADS
97 #if defined(CONFIG_MPC860T) || defined(CONFIG_MPC860) || defined(CONFIG_MPC821)
98 #define CONFIG_PCMCIA_SLOT_A
99 #else
100 #define CONFIG_PCMCIA_SLOT_B
101 #endif
102 #endif
103
104 #if defined(CONFIG_MPC885ADS)
105 #define CONFIG_PCMCIA_SLOT_A
106 #define PCMCIA_GLITCHY_CD
107 #endif
108
109 /* Cyclades ACS uses both slots */
110 #ifdef CONFIG_PRxK
111 #define CONFIG_PCMCIA_SLOT_A
112 #define CONFIG_PCMCIA_SLOT_B
113 #endif
114
115 #endif /* !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B) */
116
117 #if defined(CONFIG_PCMCIA_SLOT_A) && defined(CONFIG_PCMCIA_SLOT_B)
118
119 #define PCMCIA_SOCKETS_NO 2
120 /* We have only 8 windows, dualsocket support will be limited. */
121 #define PCMCIA_MEM_WIN_NO 2
122 #define PCMCIA_IO_WIN_NO 2
123 #define PCMCIA_SLOT_MSG "SLOT_A and SLOT_B"
124
125 #elif defined(CONFIG_PCMCIA_SLOT_A) || defined(CONFIG_PCMCIA_SLOT_B)
126
127 #define PCMCIA_SOCKETS_NO 1
128 /* full support for one slot */
129 #define PCMCIA_MEM_WIN_NO 5
130 #define PCMCIA_IO_WIN_NO 2
131
132 /* define _slot_ to be able to optimize macros */
133
134 #ifdef CONFIG_PCMCIA_SLOT_A
135 #define _slot_ 0
136 #define PCMCIA_SLOT_MSG "SLOT_A"
137 #else
138 #define _slot_ 1
139 #define PCMCIA_SLOT_MSG "SLOT_B"
140 #endif
141
142 #else
143 #error m8xx_pcmcia: Bad configuration!
144 #endif
145
146 /* ------------------------------------------------------------------------- */
147
148 #define PCMCIA_MEM_WIN_BASE 0xe0000000 /* base address for memory window 0 */
149 #define PCMCIA_MEM_WIN_SIZE 0x04000000 /* each memory window is 64 MByte */
150 #define PCMCIA_IO_WIN_BASE _IO_BASE /* base address for io window 0 */
151 /* ------------------------------------------------------------------------- */
152
153 static int pcmcia_schlvl;
154
155 static DEFINE_SPINLOCK(events_lock);
156
157 #define PCMCIA_SOCKET_KEY_5V 1
158 #define PCMCIA_SOCKET_KEY_LV 2
159
160 /* look up table for pgcrx registers */
161 static u32 *m8xx_pgcrx[2];
162
163 /*
164 * This structure is used to address each window in the PCMCIA controller.
165 *
166 * Keep in mind that we assume that pcmcia_win[n+1] is mapped directly
167 * after pcmcia_win[n]...
168 */
169
170 struct pcmcia_win {
171 u32 br;
172 u32 or;
173 };
174
175 /*
176 * For some reason the hardware guys decided to make both slots share
177 * some registers.
178 *
179 * Could someone invent object oriented hardware ?
180 *
181 * The macros are used to get the right bit from the registers.
182 * SLOT_A : slot = 0
183 * SLOT_B : slot = 1
184 */
185
186 #define M8XX_PCMCIA_VS1(slot) (0x80000000 >> (slot << 4))
187 #define M8XX_PCMCIA_VS2(slot) (0x40000000 >> (slot << 4))
188 #define M8XX_PCMCIA_VS_MASK(slot) (0xc0000000 >> (slot << 4))
189 #define M8XX_PCMCIA_VS_SHIFT(slot) (30 - (slot << 4))
190
191 #define M8XX_PCMCIA_WP(slot) (0x20000000 >> (slot << 4))
192 #define M8XX_PCMCIA_CD2(slot) (0x10000000 >> (slot << 4))
193 #define M8XX_PCMCIA_CD1(slot) (0x08000000 >> (slot << 4))
194 #define M8XX_PCMCIA_BVD2(slot) (0x04000000 >> (slot << 4))
195 #define M8XX_PCMCIA_BVD1(slot) (0x02000000 >> (slot << 4))
196 #define M8XX_PCMCIA_RDY(slot) (0x01000000 >> (slot << 4))
197 #define M8XX_PCMCIA_RDY_L(slot) (0x00800000 >> (slot << 4))
198 #define M8XX_PCMCIA_RDY_H(slot) (0x00400000 >> (slot << 4))
199 #define M8XX_PCMCIA_RDY_R(slot) (0x00200000 >> (slot << 4))
200 #define M8XX_PCMCIA_RDY_F(slot) (0x00100000 >> (slot << 4))
201 #define M8XX_PCMCIA_MASK(slot) (0xFFFF0000 >> (slot << 4))
202
203 #define M8XX_PCMCIA_POR_VALID 0x00000001
204 #define M8XX_PCMCIA_POR_WRPROT 0x00000002
205 #define M8XX_PCMCIA_POR_ATTRMEM 0x00000010
206 #define M8XX_PCMCIA_POR_IO 0x00000018
207 #define M8XX_PCMCIA_POR_16BIT 0x00000040
208
209 #define M8XX_PGCRX(slot) m8xx_pgcrx[slot]
210
211 #define M8XX_PGCRX_CXOE 0x00000080
212 #define M8XX_PGCRX_CXRESET 0x00000040
213
214 /* we keep one lookup table per socket to check flags */
215
216 #define PCMCIA_EVENTS_MAX 5 /* 4 max at a time + termination */
217
218 struct event_table {
219 u32 regbit;
220 u32 eventbit;
221 };
222
223 static const char driver_name[] = "m8xx-pcmcia";
224
225 struct socket_info {
226 void (*handler) (void *info, u32 events);
227 void *info;
228
229 u32 slot;
230 pcmconf8xx_t *pcmcia;
231 u32 bus_freq;
232 int hwirq;
233
234 socket_state_t state;
235 struct pccard_mem_map mem_win[PCMCIA_MEM_WIN_NO];
236 struct pccard_io_map io_win[PCMCIA_IO_WIN_NO];
237 struct event_table events[PCMCIA_EVENTS_MAX];
238 struct pcmcia_socket socket;
239 };
240
241 static struct socket_info socket[PCMCIA_SOCKETS_NO];
242
243 /*
244 * Search this table to see if the windowsize is
245 * supported...
246 */
247
248 #define M8XX_SIZES_NO 32
249
250 static const u32 m8xx_size_to_gray[M8XX_SIZES_NO] = {
251 0x00000001, 0x00000002, 0x00000008, 0x00000004,
252 0x00000080, 0x00000040, 0x00000010, 0x00000020,
253 0x00008000, 0x00004000, 0x00001000, 0x00002000,
254 0x00000100, 0x00000200, 0x00000800, 0x00000400,
255
256 0x0fffffff, 0xffffffff, 0xffffffff, 0xffffffff,
257 0x01000000, 0x02000000, 0xffffffff, 0x04000000,
258 0x00010000, 0x00020000, 0x00080000, 0x00040000,
259 0x00800000, 0x00400000, 0x00100000, 0x00200000
260 };
261
262 /* ------------------------------------------------------------------------- */
263
264 static irqreturn_t m8xx_interrupt(int irq, void *dev);
265
266 #define PCMCIA_BMT_LIMIT (15*4) /* Bus Monitor Timeout value */
267
268 /* ------------------------------------------------------------------------- */
269 /* board specific stuff: */
270 /* voltage_set(), hardware_enable() and hardware_disable() */
271 /* ------------------------------------------------------------------------- */
272 /* RPX Boards from Embedded Planet */
273
274 #if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
275
276 /* The RPX boards seems to have it's bus monitor timeout set to 6*8 clocks.
277 * SYPCR is write once only, therefore must the slowest memory be faster
278 * than the bus monitor or we will get a machine check due to the bus timeout.
279 */
280
281 #define PCMCIA_BOARD_MSG "RPX CLASSIC or RPX LITE"
282
283 #undef PCMCIA_BMT_LIMIT
284 #define PCMCIA_BMT_LIMIT (6*8)
285
286 static int voltage_set(int slot, int vcc, int vpp)
287 {
288 u32 reg = 0;
289
290 switch (vcc) {
291 case 0:
292 break;
293 case 33:
294 reg |= BCSR1_PCVCTL4;
295 break;
296 case 50:
297 reg |= BCSR1_PCVCTL5;
298 break;
299 default:
300 return 1;
301 }
302
303 switch (vpp) {
304 case 0:
305 break;
306 case 33:
307 case 50:
308 if (vcc == vpp)
309 reg |= BCSR1_PCVCTL6;
310 else
311 return 1;
312 break;
313 case 120:
314 reg |= BCSR1_PCVCTL7;
315 default:
316 return 1;
317 }
318
319 if (!((vcc == 50) || (vcc == 0)))
320 return 1;
321
322 /* first, turn off all power */
323
324 out_be32(((u32 *) RPX_CSR_ADDR),
325 in_be32(((u32 *) RPX_CSR_ADDR)) & ~(BCSR1_PCVCTL4 |
326 BCSR1_PCVCTL5 |
327 BCSR1_PCVCTL6 |
328 BCSR1_PCVCTL7));
329
330 /* enable new powersettings */
331
332 out_be32(((u32 *) RPX_CSR_ADDR), in_be32(((u32 *) RPX_CSR_ADDR)) | reg);
333
334 return 0;
335 }
336
337 #define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
338 #define hardware_enable(_slot_) /* No hardware to enable */
339 #define hardware_disable(_slot_) /* No hardware to disable */
340
341 #endif /* CONFIG_RPXCLASSIC */
342
343 /* FADS Boards from Motorola */
344
345 #if defined(CONFIG_FADS)
346
347 #define PCMCIA_BOARD_MSG "FADS"
348
349 static int voltage_set(int slot, int vcc, int vpp)
350 {
351 u32 reg = 0;
352
353 switch (vcc) {
354 case 0:
355 break;
356 case 33:
357 reg |= BCSR1_PCCVCC0;
358 break;
359 case 50:
360 reg |= BCSR1_PCCVCC1;
361 break;
362 default:
363 return 1;
364 }
365
366 switch (vpp) {
367 case 0:
368 break;
369 case 33:
370 case 50:
371 if (vcc == vpp)
372 reg |= BCSR1_PCCVPP1;
373 else
374 return 1;
375 break;
376 case 120:
377 if ((vcc == 33) || (vcc == 50))
378 reg |= BCSR1_PCCVPP0;
379 else
380 return 1;
381 default:
382 return 1;
383 }
384
385 /* first, turn off all power */
386 out_be32((u32 *) BCSR1,
387 in_be32((u32 *) BCSR1) & ~(BCSR1_PCCVCC_MASK |
388 BCSR1_PCCVPP_MASK));
389
390 /* enable new powersettings */
391 out_be32((u32 *) BCSR1, in_be32((u32 *) BCSR1) | reg);
392
393 return 0;
394 }
395
396 #define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
397
398 static void hardware_enable(int slot)
399 {
400 out_be32((u32 *) BCSR1, in_be32((u32 *) BCSR1) & ~BCSR1_PCCEN);
401 }
402
403 static void hardware_disable(int slot)
404 {
405 out_be32((u32 *) BCSR1, in_be32((u32 *) BCSR1) | BCSR1_PCCEN);
406 }
407
408 #endif
409
410 /* MPC885ADS Boards */
411
412 #if defined(CONFIG_MPC885ADS)
413
414 #define PCMCIA_BOARD_MSG "MPC885ADS"
415 #define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
416
417 static inline void hardware_enable(int slot)
418 {
419 m8xx_pcmcia_ops.hw_ctrl(slot, 1);
420 }
421
422 static inline void hardware_disable(int slot)
423 {
424 m8xx_pcmcia_ops.hw_ctrl(slot, 0);
425 }
426
427 static inline int voltage_set(int slot, int vcc, int vpp)
428 {
429 return m8xx_pcmcia_ops.voltage_set(slot, vcc, vpp);
430 }
431
432 #endif
433
434 /* ------------------------------------------------------------------------- */
435 /* Motorola MBX860 */
436
437 #if defined(CONFIG_MBX)
438
439 #define PCMCIA_BOARD_MSG "MBX"
440
441 static int voltage_set(int slot, int vcc, int vpp)
442 {
443 u8 reg = 0;
444
445 switch (vcc) {
446 case 0:
447 break;
448 case 33:
449 reg |= CSR2_VCC_33;
450 break;
451 case 50:
452 reg |= CSR2_VCC_50;
453 break;
454 default:
455 return 1;
456 }
457
458 switch (vpp) {
459 case 0:
460 break;
461 case 33:
462 case 50:
463 if (vcc == vpp)
464 reg |= CSR2_VPP_VCC;
465 else
466 return 1;
467 break;
468 case 120:
469 if ((vcc == 33) || (vcc == 50))
470 reg |= CSR2_VPP_12;
471 else
472 return 1;
473 default:
474 return 1;
475 }
476
477 /* first, turn off all power */
478 out_8((u8 *) MBX_CSR2_ADDR,
479 in_8((u8 *) MBX_CSR2_ADDR) & ~(CSR2_VCC_MASK | CSR2_VPP_MASK));
480
481 /* enable new powersettings */
482 out_8((u8 *) MBX_CSR2_ADDR, in_8((u8 *) MBX_CSR2_ADDR) | reg);
483
484 return 0;
485 }
486
487 #define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
488 #define hardware_enable(_slot_) /* No hardware to enable */
489 #define hardware_disable(_slot_) /* No hardware to disable */
490
491 #endif /* CONFIG_MBX */
492
493 #if defined(CONFIG_PRxK)
494 #include <asm/cpld.h>
495 extern volatile fpga_pc_regs *fpga_pc;
496
497 #define PCMCIA_BOARD_MSG "MPC855T"
498
499 static int voltage_set(int slot, int vcc, int vpp)
500 {
501 u8 reg = 0;
502 u8 regread;
503 cpld_regs *ccpld = get_cpld();
504
505 switch (vcc) {
506 case 0:
507 break;
508 case 33:
509 reg |= PCMCIA_VCC_33;
510 break;
511 case 50:
512 reg |= PCMCIA_VCC_50;
513 break;
514 default:
515 return 1;
516 }
517
518 switch (vpp) {
519 case 0:
520 break;
521 case 33:
522 case 50:
523 if (vcc == vpp)
524 reg |= PCMCIA_VPP_VCC;
525 else
526 return 1;
527 break;
528 case 120:
529 if ((vcc == 33) || (vcc == 50))
530 reg |= PCMCIA_VPP_12;
531 else
532 return 1;
533 default:
534 return 1;
535 }
536
537 reg = reg >> (slot << 2);
538 regread = in_8(&ccpld->fpga_pc_ctl);
539 if (reg !=
540 (regread & ((PCMCIA_VCC_MASK | PCMCIA_VPP_MASK) >> (slot << 2)))) {
541 /* enable new powersettings */
542 regread =
543 regread & ~((PCMCIA_VCC_MASK | PCMCIA_VPP_MASK) >>
544 (slot << 2));
545 out_8(&ccpld->fpga_pc_ctl, reg | regread);
546 msleep(100);
547 }
548
549 return 0;
550 }
551
552 #define socket_get(_slot_) PCMCIA_SOCKET_KEY_LV
553 #define hardware_enable(_slot_) /* No hardware to enable */
554 #define hardware_disable(_slot_) /* No hardware to disable */
555
556 #endif /* CONFIG_PRxK */
557
558 static u32 pending_events[PCMCIA_SOCKETS_NO];
559 static DEFINE_SPINLOCK(pending_event_lock);
560
561 static irqreturn_t m8xx_interrupt(int irq, void *dev)
562 {
563 struct socket_info *s;
564 struct event_table *e;
565 unsigned int i, events, pscr, pipr, per;
566 pcmconf8xx_t *pcmcia = socket[0].pcmcia;
567
568 dprintk("Interrupt!\n");
569 /* get interrupt sources */
570
571 pscr = in_be32(&pcmcia->pcmc_pscr);
572 pipr = in_be32(&pcmcia->pcmc_pipr);
573 per = in_be32(&pcmcia->pcmc_per);
574
575 for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
576 s = &socket[i];
577 e = &s->events[0];
578 events = 0;
579
580 while (e->regbit) {
581 if (pscr & e->regbit)
582 events |= e->eventbit;
583
584 e++;
585 }
586
587 /*
588 * report only if both card detect signals are the same
589 * not too nice done,
590 * we depend on that CD2 is the bit to the left of CD1...
591 */
592 if (events & SS_DETECT)
593 if (((pipr & M8XX_PCMCIA_CD2(i)) >> 1) ^
594 (pipr & M8XX_PCMCIA_CD1(i))) {
595 events &= ~SS_DETECT;
596 }
597 #ifdef PCMCIA_GLITCHY_CD
598 /*
599 * I've experienced CD problems with my ADS board.
600 * We make an extra check to see if there was a
601 * real change of Card detection.
602 */
603
604 if ((events & SS_DETECT) &&
605 ((pipr &
606 (M8XX_PCMCIA_CD2(i) | M8XX_PCMCIA_CD1(i))) == 0) &&
607 (s->state.Vcc | s->state.Vpp)) {
608 events &= ~SS_DETECT;
609 /*printk( "CD glitch workaround - CD = 0x%08x!\n",
610 (pipr & (M8XX_PCMCIA_CD2(i)
611 | M8XX_PCMCIA_CD1(i)))); */
612 }
613 #endif
614
615 /* call the handler */
616
617 dprintk("slot %u: events = 0x%02x, pscr = 0x%08x, "
618 "pipr = 0x%08x\n", i, events, pscr, pipr);
619
620 if (events) {
621 spin_lock(&pending_event_lock);
622 pending_events[i] |= events;
623 spin_unlock(&pending_event_lock);
624 /*
625 * Turn off RDY_L bits in the PER mask on
626 * CD interrupt receival.
627 *
628 * They can generate bad interrupts on the
629 * ACS4,8,16,32. - marcelo
630 */
631 per &= ~M8XX_PCMCIA_RDY_L(0);
632 per &= ~M8XX_PCMCIA_RDY_L(1);
633
634 out_be32(&pcmcia->pcmc_per, per);
635
636 if (events)
637 pcmcia_parse_events(&socket[i].socket, events);
638 }
639 }
640
641 /* clear the interrupt sources */
642 out_be32(&pcmcia->pcmc_pscr, pscr);
643
644 dprintk("Interrupt done.\n");
645
646 return IRQ_HANDLED;
647 }
648
649 static u32 m8xx_get_graycode(u32 size)
650 {
651 u32 k;
652
653 for (k = 0; k < M8XX_SIZES_NO; k++)
654 if (m8xx_size_to_gray[k] == size)
655 break;
656
657 if ((k == M8XX_SIZES_NO) || (m8xx_size_to_gray[k] == -1))
658 k = -1;
659
660 return k;
661 }
662
663 static u32 m8xx_get_speed(u32 ns, u32 is_io, u32 bus_freq)
664 {
665 u32 reg, clocks, psst, psl, psht;
666
667 if (!ns) {
668
669 /*
670 * We get called with IO maps setup to 0ns
671 * if not specified by the user.
672 * They should be 255ns.
673 */
674
675 if (is_io)
676 ns = 255;
677 else
678 ns = 100; /* fast memory if 0 */
679 }
680
681 /*
682 * In PSST, PSL, PSHT fields we tell the controller
683 * timing parameters in CLKOUT clock cycles.
684 * CLKOUT is the same as GCLK2_50.
685 */
686
687 /* how we want to adjust the timing - in percent */
688
689 #define ADJ 180 /* 80 % longer accesstime - to be sure */
690
691 clocks = ((bus_freq / 1000) * ns) / 1000;
692 clocks = (clocks * ADJ) / (100 * 1000);
693 if (clocks >= PCMCIA_BMT_LIMIT) {
694 printk("Max access time limit reached\n");
695 clocks = PCMCIA_BMT_LIMIT - 1;
696 }
697
698 psst = clocks / 7; /* setup time */
699 psht = clocks / 7; /* hold time */
700 psl = (clocks * 5) / 7; /* strobe length */
701
702 psst += clocks - (psst + psht + psl);
703
704 reg = psst << 12;
705 reg |= psl << 7;
706 reg |= psht << 16;
707
708 return reg;
709 }
710
711 static int m8xx_get_status(struct pcmcia_socket *sock, unsigned int *value)
712 {
713 int lsock = container_of(sock, struct socket_info, socket)->slot;
714 struct socket_info *s = &socket[lsock];
715 unsigned int pipr, reg;
716 pcmconf8xx_t *pcmcia = s->pcmcia;
717
718 pipr = in_be32(&pcmcia->pcmc_pipr);
719
720 *value = ((pipr & (M8XX_PCMCIA_CD1(lsock)
721 | M8XX_PCMCIA_CD2(lsock))) == 0) ? SS_DETECT : 0;
722 *value |= (pipr & M8XX_PCMCIA_WP(lsock)) ? SS_WRPROT : 0;
723
724 if (s->state.flags & SS_IOCARD)
725 *value |= (pipr & M8XX_PCMCIA_BVD1(lsock)) ? SS_STSCHG : 0;
726 else {
727 *value |= (pipr & M8XX_PCMCIA_RDY(lsock)) ? SS_READY : 0;
728 *value |= (pipr & M8XX_PCMCIA_BVD1(lsock)) ? SS_BATDEAD : 0;
729 *value |= (pipr & M8XX_PCMCIA_BVD2(lsock)) ? SS_BATWARN : 0;
730 }
731
732 if (s->state.Vcc | s->state.Vpp)
733 *value |= SS_POWERON;
734
735 /*
736 * Voltage detection:
737 * This driver only supports 16-Bit pc-cards.
738 * Cardbus is not handled here.
739 *
740 * To determine what voltage to use we must read the VS1 and VS2 pin.
741 * Depending on what socket type is present,
742 * different combinations mean different things.
743 *
744 * Card Key Socket Key VS1 VS2 Card Vcc for CIS parse
745 *
746 * 5V 5V, LV* NC NC 5V only 5V (if available)
747 *
748 * 5V 5V, LV* GND NC 5 or 3.3V as low as possible
749 *
750 * 5V 5V, LV* GND GND 5, 3.3, x.xV as low as possible
751 *
752 * LV* 5V - - shall not fit into socket
753 *
754 * LV* LV* GND NC 3.3V only 3.3V
755 *
756 * LV* LV* NC GND x.xV x.xV (if avail.)
757 *
758 * LV* LV* GND GND 3.3 or x.xV as low as possible
759 *
760 * *LV means Low Voltage
761 *
762 *
763 * That gives us the following table:
764 *
765 * Socket VS1 VS2 Voltage
766 *
767 * 5V NC NC 5V
768 * 5V NC GND none (should not be possible)
769 * 5V GND NC >= 3.3V
770 * 5V GND GND >= x.xV
771 *
772 * LV NC NC 5V (if available)
773 * LV NC GND x.xV (if available)
774 * LV GND NC 3.3V
775 * LV GND GND >= x.xV
776 *
777 * So, how do I determine if I have a 5V or a LV
778 * socket on my board? Look at the socket!
779 *
780 *
781 * Socket with 5V key:
782 * ++--------------------------------------------+
783 * || |
784 * || ||
785 * || ||
786 * | |
787 * +---------------------------------------------+
788 *
789 * Socket with LV key:
790 * ++--------------------------------------------+
791 * || |
792 * | ||
793 * | ||
794 * | |
795 * +---------------------------------------------+
796 *
797 *
798 * With other words - LV only cards does not fit
799 * into the 5V socket!
800 */
801
802 /* read out VS1 and VS2 */
803
804 reg = (pipr & M8XX_PCMCIA_VS_MASK(lsock))
805 >> M8XX_PCMCIA_VS_SHIFT(lsock);
806
807 if (socket_get(lsock) == PCMCIA_SOCKET_KEY_LV) {
808 switch (reg) {
809 case 1:
810 *value |= SS_3VCARD;
811 break; /* GND, NC - 3.3V only */
812 case 2:
813 *value |= SS_XVCARD;
814 break; /* NC. GND - x.xV only */
815 };
816 }
817
818 dprintk("GetStatus(%d) = %#2.2x\n", lsock, *value);
819 return 0;
820 }
821
822 static int m8xx_set_socket(struct pcmcia_socket *sock, socket_state_t * state)
823 {
824 int lsock = container_of(sock, struct socket_info, socket)->slot;
825 struct socket_info *s = &socket[lsock];
826 struct event_table *e;
827 unsigned int reg;
828 unsigned long flags;
829 pcmconf8xx_t *pcmcia = socket[0].pcmcia;
830
831 dprintk("SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
832 "io_irq %d, csc_mask %#2.2x)\n", lsock, state->flags,
833 state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
834
835 /* First, set voltage - bail out if invalid */
836 if (voltage_set(lsock, state->Vcc, state->Vpp))
837 return -EINVAL;
838
839 /* Take care of reset... */
840 if (state->flags & SS_RESET)
841 out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) | M8XX_PGCRX_CXRESET); /* active high */
842 else
843 out_be32(M8XX_PGCRX(lsock),
844 in_be32(M8XX_PGCRX(lsock)) & ~M8XX_PGCRX_CXRESET);
845
846 /* ... and output enable. */
847
848 /* The CxOE signal is connected to a 74541 on the ADS.
849 I guess most other boards used the ADS as a reference.
850 I tried to control the CxOE signal with SS_OUTPUT_ENA,
851 but the reset signal seems connected via the 541.
852 If the CxOE is left high are some signals tristated and
853 no pullups are present -> the cards act weird.
854 So right now the buffers are enabled if the power is on. */
855
856 if (state->Vcc || state->Vpp)
857 out_be32(M8XX_PGCRX(lsock), in_be32(M8XX_PGCRX(lsock)) & ~M8XX_PGCRX_CXOE); /* active low */
858 else
859 out_be32(M8XX_PGCRX(lsock),
860 in_be32(M8XX_PGCRX(lsock)) | M8XX_PGCRX_CXOE);
861
862 /*
863 * We'd better turn off interrupts before
864 * we mess with the events-table..
865 */
866
867 spin_lock_irqsave(&events_lock, flags);
868
869 /*
870 * Play around with the interrupt mask to be able to
871 * give the events the generic pcmcia driver wants us to.
872 */
873
874 e = &s->events[0];
875 reg = 0;
876
877 if (state->csc_mask & SS_DETECT) {
878 e->eventbit = SS_DETECT;
879 reg |= e->regbit = (M8XX_PCMCIA_CD2(lsock)
880 | M8XX_PCMCIA_CD1(lsock));
881 e++;
882 }
883 if (state->flags & SS_IOCARD) {
884 /*
885 * I/O card
886 */
887 if (state->csc_mask & SS_STSCHG) {
888 e->eventbit = SS_STSCHG;
889 reg |= e->regbit = M8XX_PCMCIA_BVD1(lsock);
890 e++;
891 }
892 /*
893 * If io_irq is non-zero we should enable irq.
894 */
895 if (state->io_irq) {
896 out_be32(M8XX_PGCRX(lsock),
897 in_be32(M8XX_PGCRX(lsock)) |
898 mk_int_int_mask(s->hwirq) << 24);
899 /*
900 * Strange thing here:
901 * The manual does not tell us which interrupt
902 * the sources generate.
903 * Anyhow, I found out that RDY_L generates IREQLVL.
904 *
905 * We use level triggerd interrupts, and they don't
906 * have to be cleared in PSCR in the interrupt handler.
907 */
908 reg |= M8XX_PCMCIA_RDY_L(lsock);
909 } else
910 out_be32(M8XX_PGCRX(lsock),
911 in_be32(M8XX_PGCRX(lsock)) & 0x00ffffff);
912 } else {
913 /*
914 * Memory card
915 */
916 if (state->csc_mask & SS_BATDEAD) {
917 e->eventbit = SS_BATDEAD;
918 reg |= e->regbit = M8XX_PCMCIA_BVD1(lsock);
919 e++;
920 }
921 if (state->csc_mask & SS_BATWARN) {
922 e->eventbit = SS_BATWARN;
923 reg |= e->regbit = M8XX_PCMCIA_BVD2(lsock);
924 e++;
925 }
926 /* What should I trigger on - low/high,raise,fall? */
927 if (state->csc_mask & SS_READY) {
928 e->eventbit = SS_READY;
929 reg |= e->regbit = 0; //??
930 e++;
931 }
932 }
933
934 e->regbit = 0; /* terminate list */
935
936 /*
937 * Clear the status changed .
938 * Port A and Port B share the same port.
939 * Writing ones will clear the bits.
940 */
941
942 out_be32(&pcmcia->pcmc_pscr, reg);
943
944 /*
945 * Write the mask.
946 * Port A and Port B share the same port.
947 * Need for read-modify-write.
948 * Ones will enable the interrupt.
949 */
950
951 reg |=
952 in_be32(&pcmcia->
953 pcmc_per) & (M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1));
954 out_be32(&pcmcia->pcmc_per, reg);
955
956 spin_unlock_irqrestore(&events_lock, flags);
957
958 /* copy the struct and modify the copy */
959
960 s->state = *state;
961
962 return 0;
963 }
964
965 static int m8xx_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io)
966 {
967 int lsock = container_of(sock, struct socket_info, socket)->slot;
968
969 struct socket_info *s = &socket[lsock];
970 struct pcmcia_win *w;
971 unsigned int reg, winnr;
972 pcmconf8xx_t *pcmcia = s->pcmcia;
973
974 #define M8XX_SIZE (io->stop - io->start + 1)
975 #define M8XX_BASE (PCMCIA_IO_WIN_BASE + io->start)
976
977 dprintk("SetIOMap(%d, %d, %#2.2x, %d ns, "
978 "%#4.4x-%#4.4x)\n", lsock, io->map, io->flags,
979 io->speed, io->start, io->stop);
980
981 if ((io->map >= PCMCIA_IO_WIN_NO) || (io->start > 0xffff)
982 || (io->stop > 0xffff) || (io->stop < io->start))
983 return -EINVAL;
984
985 if ((reg = m8xx_get_graycode(M8XX_SIZE)) == -1)
986 return -EINVAL;
987
988 if (io->flags & MAP_ACTIVE) {
989
990 dprintk("io->flags & MAP_ACTIVE\n");
991
992 winnr = (PCMCIA_MEM_WIN_NO * PCMCIA_SOCKETS_NO)
993 + (lsock * PCMCIA_IO_WIN_NO) + io->map;
994
995 /* setup registers */
996
997 w = (void *)&pcmcia->pcmc_pbr0;
998 w += winnr;
999
1000 out_be32(&w->or, 0); /* turn off window first */
1001 out_be32(&w->br, M8XX_BASE);
1002
1003 reg <<= 27;
1004 reg |= M8XX_PCMCIA_POR_IO | (lsock << 2);
1005
1006 reg |= m8xx_get_speed(io->speed, 1, s->bus_freq);
1007
1008 if (io->flags & MAP_WRPROT)
1009 reg |= M8XX_PCMCIA_POR_WRPROT;
1010
1011 /*if(io->flags & (MAP_16BIT | MAP_AUTOSZ)) */
1012 if (io->flags & MAP_16BIT)
1013 reg |= M8XX_PCMCIA_POR_16BIT;
1014
1015 if (io->flags & MAP_ACTIVE)
1016 reg |= M8XX_PCMCIA_POR_VALID;
1017
1018 out_be32(&w->or, reg);
1019
1020 dprintk("Socket %u: Mapped io window %u at %#8.8x, "
1021 "OR = %#8.8x.\n", lsock, io->map, w->br, w->or);
1022 } else {
1023 /* shutdown IO window */
1024 winnr = (PCMCIA_MEM_WIN_NO * PCMCIA_SOCKETS_NO)
1025 + (lsock * PCMCIA_IO_WIN_NO) + io->map;
1026
1027 /* setup registers */
1028
1029 w = (void *)&pcmcia->pcmc_pbr0;
1030 w += winnr;
1031
1032 out_be32(&w->or, 0); /* turn off window */
1033 out_be32(&w->br, 0); /* turn off base address */
1034
1035 dprintk("Socket %u: Unmapped io window %u at %#8.8x, "
1036 "OR = %#8.8x.\n", lsock, io->map, w->br, w->or);
1037 }
1038
1039 /* copy the struct and modify the copy */
1040 s->io_win[io->map] = *io;
1041 s->io_win[io->map].flags &= (MAP_WRPROT | MAP_16BIT | MAP_ACTIVE);
1042 dprintk("SetIOMap exit\n");
1043
1044 return 0;
1045 }
1046
1047 static int m8xx_set_mem_map(struct pcmcia_socket *sock,
1048 struct pccard_mem_map *mem)
1049 {
1050 int lsock = container_of(sock, struct socket_info, socket)->slot;
1051 struct socket_info *s = &socket[lsock];
1052 struct pcmcia_win *w;
1053 struct pccard_mem_map *old;
1054 unsigned int reg, winnr;
1055 pcmconf8xx_t *pcmcia = s->pcmcia;
1056
1057 dprintk("SetMemMap(%d, %d, %#2.2x, %d ns, "
1058 "%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
1059 mem->speed, mem->static_start, mem->card_start);
1060
1061 if ((mem->map >= PCMCIA_MEM_WIN_NO)
1062 // || ((mem->s) >= PCMCIA_MEM_WIN_SIZE)
1063 || (mem->card_start >= 0x04000000)
1064 || (mem->static_start & 0xfff) /* 4KByte resolution */
1065 ||(mem->card_start & 0xfff))
1066 return -EINVAL;
1067
1068 if ((reg = m8xx_get_graycode(PCMCIA_MEM_WIN_SIZE)) == -1) {
1069 printk("Cannot set size to 0x%08x.\n", PCMCIA_MEM_WIN_SIZE);
1070 return -EINVAL;
1071 }
1072 reg <<= 27;
1073
1074 winnr = (lsock * PCMCIA_MEM_WIN_NO) + mem->map;
1075
1076 /* Setup the window in the pcmcia controller */
1077
1078 w = (void *)&pcmcia->pcmc_pbr0;
1079 w += winnr;
1080
1081 reg |= lsock << 2;
1082
1083 reg |= m8xx_get_speed(mem->speed, 0, s->bus_freq);
1084
1085 if (mem->flags & MAP_ATTRIB)
1086 reg |= M8XX_PCMCIA_POR_ATTRMEM;
1087
1088 if (mem->flags & MAP_WRPROT)
1089 reg |= M8XX_PCMCIA_POR_WRPROT;
1090
1091 if (mem->flags & MAP_16BIT)
1092 reg |= M8XX_PCMCIA_POR_16BIT;
1093
1094 if (mem->flags & MAP_ACTIVE)
1095 reg |= M8XX_PCMCIA_POR_VALID;
1096
1097 out_be32(&w->or, reg);
1098
1099 dprintk("Socket %u: Mapped memory window %u at %#8.8x, "
1100 "OR = %#8.8x.\n", lsock, mem->map, w->br, w->or);
1101
1102 if (mem->flags & MAP_ACTIVE) {
1103 /* get the new base address */
1104 mem->static_start = PCMCIA_MEM_WIN_BASE +
1105 (PCMCIA_MEM_WIN_SIZE * winnr)
1106 + mem->card_start;
1107 }
1108
1109 dprintk("SetMemMap(%d, %d, %#2.2x, %d ns, "
1110 "%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
1111 mem->speed, mem->static_start, mem->card_start);
1112
1113 /* copy the struct and modify the copy */
1114
1115 old = &s->mem_win[mem->map];
1116
1117 *old = *mem;
1118 old->flags &= (MAP_ATTRIB | MAP_WRPROT | MAP_16BIT | MAP_ACTIVE);
1119
1120 return 0;
1121 }
1122
1123 static int m8xx_sock_init(struct pcmcia_socket *sock)
1124 {
1125 int i;
1126 pccard_io_map io = { 0, 0, 0, 0, 1 };
1127 pccard_mem_map mem = { 0, 0, 0, 0, 0, 0 };
1128
1129 dprintk("sock_init(%d)\n", s);
1130
1131 m8xx_set_socket(sock, &dead_socket);
1132 for (i = 0; i < PCMCIA_IO_WIN_NO; i++) {
1133 io.map = i;
1134 m8xx_set_io_map(sock, &io);
1135 }
1136 for (i = 0; i < PCMCIA_MEM_WIN_NO; i++) {
1137 mem.map = i;
1138 m8xx_set_mem_map(sock, &mem);
1139 }
1140
1141 return 0;
1142
1143 }
1144
1145 static int m8xx_sock_suspend(struct pcmcia_socket *sock)
1146 {
1147 return m8xx_set_socket(sock, &dead_socket);
1148 }
1149
1150 static struct pccard_operations m8xx_services = {
1151 .init = m8xx_sock_init,
1152 .suspend = m8xx_sock_suspend,
1153 .get_status = m8xx_get_status,
1154 .set_socket = m8xx_set_socket,
1155 .set_io_map = m8xx_set_io_map,
1156 .set_mem_map = m8xx_set_mem_map,
1157 };
1158
1159 static int __init m8xx_probe(struct of_device *ofdev,
1160 const struct of_device_id *match)
1161 {
1162 struct pcmcia_win *w;
1163 unsigned int i, m, hwirq;
1164 pcmconf8xx_t *pcmcia;
1165 int status;
1166 struct device_node *np = ofdev->node;
1167
1168 pcmcia_info("%s\n", version);
1169
1170 pcmcia = of_iomap(np, 0);
1171 if (pcmcia == NULL)
1172 return -EINVAL;
1173
1174 pcmcia_schlvl = irq_of_parse_and_map(np, 0);
1175 hwirq = irq_map[pcmcia_schlvl].hwirq;
1176 if (pcmcia_schlvl < 0) {
1177 iounmap(pcmcia);
1178 return -EINVAL;
1179 }
1180
1181 m8xx_pgcrx[0] = &pcmcia->pcmc_pgcra;
1182 m8xx_pgcrx[1] = &pcmcia->pcmc_pgcrb;
1183
1184 pcmcia_info(PCMCIA_BOARD_MSG " using " PCMCIA_SLOT_MSG
1185 " with IRQ %u (%d). \n", pcmcia_schlvl, hwirq);
1186
1187 /* Configure Status change interrupt */
1188
1189 if (request_irq(pcmcia_schlvl, m8xx_interrupt, IRQF_SHARED,
1190 driver_name, socket)) {
1191 pcmcia_error("Cannot allocate IRQ %u for SCHLVL!\n",
1192 pcmcia_schlvl);
1193 iounmap(pcmcia);
1194 return -1;
1195 }
1196
1197 w = (void *)&pcmcia->pcmc_pbr0;
1198
1199 out_be32(&pcmcia->pcmc_pscr, M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1));
1200 clrbits32(&pcmcia->pcmc_per, M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1));
1201
1202 /* connect interrupt and disable CxOE */
1203
1204 out_be32(M8XX_PGCRX(0),
1205 M8XX_PGCRX_CXOE | (mk_int_int_mask(hwirq) << 16));
1206 out_be32(M8XX_PGCRX(1),
1207 M8XX_PGCRX_CXOE | (mk_int_int_mask(hwirq) << 16));
1208
1209 /* intialize the fixed memory windows */
1210
1211 for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
1212 for (m = 0; m < PCMCIA_MEM_WIN_NO; m++) {
1213 out_be32(&w->br, PCMCIA_MEM_WIN_BASE +
1214 (PCMCIA_MEM_WIN_SIZE
1215 * (m + i * PCMCIA_MEM_WIN_NO)));
1216
1217 out_be32(&w->or, 0); /* set to not valid */
1218
1219 w++;
1220 }
1221 }
1222
1223 /* turn off voltage */
1224 voltage_set(0, 0, 0);
1225 voltage_set(1, 0, 0);
1226
1227 /* Enable external hardware */
1228 hardware_enable(0);
1229 hardware_enable(1);
1230
1231 for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
1232 socket[i].slot = i;
1233 socket[i].socket.owner = THIS_MODULE;
1234 socket[i].socket.features =
1235 SS_CAP_PCCARD | SS_CAP_MEM_ALIGN | SS_CAP_STATIC_MAP;
1236 socket[i].socket.irq_mask = 0x000;
1237 socket[i].socket.map_size = 0x1000;
1238 socket[i].socket.io_offset = 0;
1239 socket[i].socket.pci_irq = pcmcia_schlvl;
1240 socket[i].socket.ops = &m8xx_services;
1241 socket[i].socket.resource_ops = &pccard_nonstatic_ops;
1242 socket[i].socket.cb_dev = NULL;
1243 socket[i].socket.dev.parent = &ofdev->dev;
1244 socket[i].pcmcia = pcmcia;
1245 socket[i].bus_freq = ppc_proc_freq;
1246 socket[i].hwirq = hwirq;
1247
1248 }
1249
1250 for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
1251 status = pcmcia_register_socket(&socket[i].socket);
1252 if (status < 0)
1253 pcmcia_error("Socket register failed\n");
1254 }
1255
1256 return 0;
1257 }
1258
1259 static int m8xx_remove(struct of_device *ofdev)
1260 {
1261 u32 m, i;
1262 struct pcmcia_win *w;
1263 pcmconf8xx_t *pcmcia = socket[0].pcmcia;
1264
1265 for (i = 0; i < PCMCIA_SOCKETS_NO; i++) {
1266 w = (void *)&pcmcia->pcmc_pbr0;
1267
1268 out_be32(&pcmcia->pcmc_pscr, M8XX_PCMCIA_MASK(i));
1269 out_be32(&pcmcia->pcmc_per,
1270 in_be32(&pcmcia->pcmc_per) & ~M8XX_PCMCIA_MASK(i));
1271
1272 /* turn off interrupt and disable CxOE */
1273 out_be32(M8XX_PGCRX(i), M8XX_PGCRX_CXOE);
1274
1275 /* turn off memory windows */
1276 for (m = 0; m < PCMCIA_MEM_WIN_NO; m++) {
1277 out_be32(&w->or, 0); /* set to not valid */
1278 w++;
1279 }
1280
1281 /* turn off voltage */
1282 voltage_set(i, 0, 0);
1283
1284 /* disable external hardware */
1285 hardware_disable(i);
1286 }
1287 for (i = 0; i < PCMCIA_SOCKETS_NO; i++)
1288 pcmcia_unregister_socket(&socket[i].socket);
1289 iounmap(pcmcia);
1290
1291 free_irq(pcmcia_schlvl, NULL);
1292
1293 return 0;
1294 }
1295
1296 #ifdef CONFIG_PM
1297 static int m8xx_suspend(struct platform_device *pdev, pm_message_t state)
1298 {
1299 return pcmcia_socket_dev_suspend(&pdev->dev);
1300 }
1301
1302 static int m8xx_resume(struct platform_device *pdev)
1303 {
1304 return pcmcia_socket_dev_resume(&pdev->dev);
1305 }
1306 #else
1307 #define m8xx_suspend NULL
1308 #define m8xx_resume NULL
1309 #endif
1310
1311 static struct of_device_id m8xx_pcmcia_match[] = {
1312 {
1313 .type = "pcmcia",
1314 .compatible = "fsl,pq-pcmcia",
1315 },
1316 {},
1317 };
1318
1319 MODULE_DEVICE_TABLE(of, m8xx_pcmcia_match);
1320
1321 static struct of_platform_driver m8xx_pcmcia_driver = {
1322 .name = driver_name,
1323 .match_table = m8xx_pcmcia_match,
1324 .probe = m8xx_probe,
1325 .remove = m8xx_remove,
1326 .suspend = m8xx_suspend,
1327 .resume = m8xx_resume,
1328 };
1329
1330 static int __init m8xx_init(void)
1331 {
1332 return of_register_platform_driver(&m8xx_pcmcia_driver);
1333 }
1334
1335 static void __exit m8xx_exit(void)
1336 {
1337 of_unregister_platform_driver(&m8xx_pcmcia_driver);
1338 }
1339
1340 module_init(m8xx_init);
1341 module_exit(m8xx_exit);
1342
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