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