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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/common/sa1111.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/arm/common/sa1111.c')
-rw-r--r--arch/arm/common/sa1111.c1292
1 files changed, 1292 insertions, 0 deletions
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
new file mode 100644
index 000000000000..21fce3414ed1
--- /dev/null
+++ b/arch/arm/common/sa1111.c
@@ -0,0 +1,1292 @@
1/*
2 * linux/arch/arm/mach-sa1100/sa1111.c
3 *
4 * SA1111 support
5 *
6 * Original code by John Dorsey
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This file contains all generic SA1111 support.
13 *
14 * All initialization functions provided here are intended to be called
15 * from machine specific code with proper arguments when required.
16 */
17#include <linux/config.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/delay.h>
22#include <linux/ptrace.h>
23#include <linux/errno.h>
24#include <linux/ioport.h>
25#include <linux/device.h>
26#include <linux/slab.h>
27#include <linux/spinlock.h>
28#include <linux/dma-mapping.h>
29
30#include <asm/hardware.h>
31#include <asm/mach-types.h>
32#include <asm/io.h>
33#include <asm/irq.h>
34#include <asm/mach/irq.h>
35
36#include <asm/hardware/sa1111.h>
37
38#ifdef CONFIG_ARCH_PXA
39#include <asm/arch/pxa-regs.h>
40#endif
41
42extern void __init sa1110_mb_enable(void);
43
44/*
45 * We keep the following data for the overall SA1111. Note that the
46 * struct device and struct resource are "fake"; they should be supplied
47 * by the bus above us. However, in the interests of getting all SA1111
48 * drivers converted over to the device model, we provide this as an
49 * anchor point for all the other drivers.
50 */
51struct sa1111 {
52 struct device *dev;
53 unsigned long phys;
54 int irq;
55 spinlock_t lock;
56 void __iomem *base;
57};
58
59/*
60 * We _really_ need to eliminate this. Its only users
61 * are the PWM and DMA checking code.
62 */
63static struct sa1111 *g_sa1111;
64
65struct sa1111_dev_info {
66 unsigned long offset;
67 unsigned long skpcr_mask;
68 unsigned int devid;
69 unsigned int irq[6];
70};
71
72static struct sa1111_dev_info sa1111_devices[] = {
73 {
74 .offset = SA1111_USB,
75 .skpcr_mask = SKPCR_UCLKEN,
76 .devid = SA1111_DEVID_USB,
77 .irq = {
78 IRQ_USBPWR,
79 IRQ_HCIM,
80 IRQ_HCIBUFFACC,
81 IRQ_HCIRMTWKP,
82 IRQ_NHCIMFCIR,
83 IRQ_USB_PORT_RESUME
84 },
85 },
86 {
87 .offset = 0x0600,
88 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
89 .devid = SA1111_DEVID_SAC,
90 .irq = {
91 AUDXMTDMADONEA,
92 AUDXMTDMADONEB,
93 AUDRCVDMADONEA,
94 AUDRCVDMADONEB
95 },
96 },
97 {
98 .offset = 0x0800,
99 .skpcr_mask = SKPCR_SCLKEN,
100 .devid = SA1111_DEVID_SSP,
101 },
102 {
103 .offset = SA1111_KBD,
104 .skpcr_mask = SKPCR_PTCLKEN,
105 .devid = SA1111_DEVID_PS2,
106 .irq = {
107 IRQ_TPRXINT,
108 IRQ_TPTXINT
109 },
110 },
111 {
112 .offset = SA1111_MSE,
113 .skpcr_mask = SKPCR_PMCLKEN,
114 .devid = SA1111_DEVID_PS2,
115 .irq = {
116 IRQ_MSRXINT,
117 IRQ_MSTXINT
118 },
119 },
120 {
121 .offset = 0x1800,
122 .skpcr_mask = 0,
123 .devid = SA1111_DEVID_PCMCIA,
124 .irq = {
125 IRQ_S0_READY_NINT,
126 IRQ_S0_CD_VALID,
127 IRQ_S0_BVD1_STSCHG,
128 IRQ_S1_READY_NINT,
129 IRQ_S1_CD_VALID,
130 IRQ_S1_BVD1_STSCHG,
131 },
132 },
133};
134
135/*
136 * SA1111 interrupt support. Since clearing an IRQ while there are
137 * active IRQs causes the interrupt output to pulse, the upper levels
138 * will call us again if there are more interrupts to process.
139 */
140static void
141sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
142{
143 unsigned int stat0, stat1, i;
144 void __iomem *base = desc->data;
145
146 stat0 = sa1111_readl(base + SA1111_INTSTATCLR0);
147 stat1 = sa1111_readl(base + SA1111_INTSTATCLR1);
148
149 sa1111_writel(stat0, base + SA1111_INTSTATCLR0);
150
151 desc->chip->ack(irq);
152
153 sa1111_writel(stat1, base + SA1111_INTSTATCLR1);
154
155 if (stat0 == 0 && stat1 == 0) {
156 do_bad_IRQ(irq, desc, regs);
157 return;
158 }
159
160 for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
161 if (stat0 & 1)
162 do_edge_IRQ(i, irq_desc + i, regs);
163
164 for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
165 if (stat1 & 1)
166 do_edge_IRQ(i, irq_desc + i, regs);
167
168 /* For level-based interrupts */
169 desc->chip->unmask(irq);
170}
171
172#define SA1111_IRQMASK_LO(x) (1 << (x - IRQ_SA1111_START))
173#define SA1111_IRQMASK_HI(x) (1 << (x - IRQ_SA1111_START - 32))
174
175static void sa1111_ack_irq(unsigned int irq)
176{
177}
178
179static void sa1111_mask_lowirq(unsigned int irq)
180{
181 void __iomem *mapbase = get_irq_chipdata(irq);
182 unsigned long ie0;
183
184 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
185 ie0 &= ~SA1111_IRQMASK_LO(irq);
186 writel(ie0, mapbase + SA1111_INTEN0);
187}
188
189static void sa1111_unmask_lowirq(unsigned int irq)
190{
191 void __iomem *mapbase = get_irq_chipdata(irq);
192 unsigned long ie0;
193
194 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
195 ie0 |= SA1111_IRQMASK_LO(irq);
196 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
197}
198
199/*
200 * Attempt to re-trigger the interrupt. The SA1111 contains a register
201 * (INTSET) which claims to do this. However, in practice no amount of
202 * manipulation of INTEN and INTSET guarantees that the interrupt will
203 * be triggered. In fact, its very difficult, if not impossible to get
204 * INTSET to re-trigger the interrupt.
205 */
206static int sa1111_retrigger_lowirq(unsigned int irq)
207{
208 unsigned int mask = SA1111_IRQMASK_LO(irq);
209 void __iomem *mapbase = get_irq_chipdata(irq);
210 unsigned long ip0;
211 int i;
212
213 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
214 for (i = 0; i < 8; i++) {
215 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
216 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
217 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
218 break;
219 }
220
221 if (i == 8)
222 printk(KERN_ERR "Danger Will Robinson: failed to "
223 "re-trigger IRQ%d\n", irq);
224 return i == 8 ? -1 : 0;
225}
226
227static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
228{
229 unsigned int mask = SA1111_IRQMASK_LO(irq);
230 void __iomem *mapbase = get_irq_chipdata(irq);
231 unsigned long ip0;
232
233 if (flags == IRQT_PROBE)
234 return 0;
235
236 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
237 return -EINVAL;
238
239 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
240 if (flags & __IRQT_RISEDGE)
241 ip0 &= ~mask;
242 else
243 ip0 |= mask;
244 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
245 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
246
247 return 0;
248}
249
250static int sa1111_wake_lowirq(unsigned int irq, unsigned int on)
251{
252 unsigned int mask = SA1111_IRQMASK_LO(irq);
253 void __iomem *mapbase = get_irq_chipdata(irq);
254 unsigned long we0;
255
256 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
257 if (on)
258 we0 |= mask;
259 else
260 we0 &= ~mask;
261 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
262
263 return 0;
264}
265
266static struct irqchip sa1111_low_chip = {
267 .ack = sa1111_ack_irq,
268 .mask = sa1111_mask_lowirq,
269 .unmask = sa1111_unmask_lowirq,
270 .retrigger = sa1111_retrigger_lowirq,
271 .type = sa1111_type_lowirq,
272 .wake = sa1111_wake_lowirq,
273};
274
275static void sa1111_mask_highirq(unsigned int irq)
276{
277 void __iomem *mapbase = get_irq_chipdata(irq);
278 unsigned long ie1;
279
280 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
281 ie1 &= ~SA1111_IRQMASK_HI(irq);
282 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
283}
284
285static void sa1111_unmask_highirq(unsigned int irq)
286{
287 void __iomem *mapbase = get_irq_chipdata(irq);
288 unsigned long ie1;
289
290 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
291 ie1 |= SA1111_IRQMASK_HI(irq);
292 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
293}
294
295/*
296 * Attempt to re-trigger the interrupt. The SA1111 contains a register
297 * (INTSET) which claims to do this. However, in practice no amount of
298 * manipulation of INTEN and INTSET guarantees that the interrupt will
299 * be triggered. In fact, its very difficult, if not impossible to get
300 * INTSET to re-trigger the interrupt.
301 */
302static int sa1111_retrigger_highirq(unsigned int irq)
303{
304 unsigned int mask = SA1111_IRQMASK_HI(irq);
305 void __iomem *mapbase = get_irq_chipdata(irq);
306 unsigned long ip1;
307 int i;
308
309 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
310 for (i = 0; i < 8; i++) {
311 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
312 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
313 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
314 break;
315 }
316
317 if (i == 8)
318 printk(KERN_ERR "Danger Will Robinson: failed to "
319 "re-trigger IRQ%d\n", irq);
320 return i == 8 ? -1 : 0;
321}
322
323static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
324{
325 unsigned int mask = SA1111_IRQMASK_HI(irq);
326 void __iomem *mapbase = get_irq_chipdata(irq);
327 unsigned long ip1;
328
329 if (flags == IRQT_PROBE)
330 return 0;
331
332 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
333 return -EINVAL;
334
335 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
336 if (flags & __IRQT_RISEDGE)
337 ip1 &= ~mask;
338 else
339 ip1 |= mask;
340 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
341 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
342
343 return 0;
344}
345
346static int sa1111_wake_highirq(unsigned int irq, unsigned int on)
347{
348 unsigned int mask = SA1111_IRQMASK_HI(irq);
349 void __iomem *mapbase = get_irq_chipdata(irq);
350 unsigned long we1;
351
352 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
353 if (on)
354 we1 |= mask;
355 else
356 we1 &= ~mask;
357 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
358
359 return 0;
360}
361
362static struct irqchip sa1111_high_chip = {
363 .ack = sa1111_ack_irq,
364 .mask = sa1111_mask_highirq,
365 .unmask = sa1111_unmask_highirq,
366 .retrigger = sa1111_retrigger_highirq,
367 .type = sa1111_type_highirq,
368 .wake = sa1111_wake_highirq,
369};
370
371static void sa1111_setup_irq(struct sa1111 *sachip)
372{
373 void __iomem *irqbase = sachip->base + SA1111_INTC;
374 unsigned int irq;
375
376 /*
377 * We're guaranteed that this region hasn't been taken.
378 */
379 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
380
381 /* disable all IRQs */
382 sa1111_writel(0, irqbase + SA1111_INTEN0);
383 sa1111_writel(0, irqbase + SA1111_INTEN1);
384 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
385 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
386
387 /*
388 * detect on rising edge. Note: Feb 2001 Errata for SA1111
389 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
390 */
391 sa1111_writel(0, irqbase + SA1111_INTPOL0);
392 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
393 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
394 irqbase + SA1111_INTPOL1);
395
396 /* clear all IRQs */
397 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
398 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
399
400 for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) {
401 set_irq_chip(irq, &sa1111_low_chip);
402 set_irq_chipdata(irq, irqbase);
403 set_irq_handler(irq, do_edge_IRQ);
404 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
405 }
406
407 for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) {
408 set_irq_chip(irq, &sa1111_high_chip);
409 set_irq_chipdata(irq, irqbase);
410 set_irq_handler(irq, do_edge_IRQ);
411 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
412 }
413
414 /*
415 * Register SA1111 interrupt
416 */
417 set_irq_type(sachip->irq, IRQT_RISING);
418 set_irq_data(sachip->irq, irqbase);
419 set_irq_chained_handler(sachip->irq, sa1111_irq_handler);
420}
421
422/*
423 * Bring the SA1111 out of reset. This requires a set procedure:
424 * 1. nRESET asserted (by hardware)
425 * 2. CLK turned on from SA1110
426 * 3. nRESET deasserted
427 * 4. VCO turned on, PLL_BYPASS turned off
428 * 5. Wait lock time, then assert RCLKEn
429 * 7. PCR set to allow clocking of individual functions
430 *
431 * Until we've done this, the only registers we can access are:
432 * SBI_SKCR
433 * SBI_SMCR
434 * SBI_SKID
435 */
436static void sa1111_wake(struct sa1111 *sachip)
437{
438 unsigned long flags, r;
439
440 spin_lock_irqsave(&sachip->lock, flags);
441
442#ifdef CONFIG_ARCH_SA1100
443 /*
444 * First, set up the 3.6864MHz clock on GPIO 27 for the SA-1111:
445 * (SA-1110 Developer's Manual, section 9.1.2.1)
446 */
447 GAFR |= GPIO_32_768kHz;
448 GPDR |= GPIO_32_768kHz;
449 TUCR = TUCR_3_6864MHz;
450#elif CONFIG_ARCH_PXA
451 pxa_gpio_mode(GPIO11_3_6MHz_MD);
452#else
453#error missing clock setup
454#endif
455
456 /*
457 * Turn VCO on, and disable PLL Bypass.
458 */
459 r = sa1111_readl(sachip->base + SA1111_SKCR);
460 r &= ~SKCR_VCO_OFF;
461 sa1111_writel(r, sachip->base + SA1111_SKCR);
462 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
463 sa1111_writel(r, sachip->base + SA1111_SKCR);
464
465 /*
466 * Wait lock time. SA1111 manual _doesn't_
467 * specify a figure for this! We choose 100us.
468 */
469 udelay(100);
470
471 /*
472 * Enable RCLK. We also ensure that RDYEN is set.
473 */
474 r |= SKCR_RCLKEN | SKCR_RDYEN;
475 sa1111_writel(r, sachip->base + SA1111_SKCR);
476
477 /*
478 * Wait 14 RCLK cycles for the chip to finish coming out
479 * of reset. (RCLK=24MHz). This is 590ns.
480 */
481 udelay(1);
482
483 /*
484 * Ensure all clocks are initially off.
485 */
486 sa1111_writel(0, sachip->base + SA1111_SKPCR);
487
488 spin_unlock_irqrestore(&sachip->lock, flags);
489}
490
491#ifdef CONFIG_ARCH_SA1100
492
493static u32 sa1111_dma_mask[] = {
494 ~0,
495 ~(1 << 20),
496 ~(1 << 23),
497 ~(1 << 24),
498 ~(1 << 25),
499 ~(1 << 20),
500 ~(1 << 20),
501 0,
502};
503
504/*
505 * Configure the SA1111 shared memory controller.
506 */
507void
508sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
509 unsigned int cas_latency)
510{
511 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
512
513 if (cas_latency == 3)
514 smcr |= SMCR_CLAT;
515
516 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
517
518 /*
519 * Now clear the bits in the DMA mask to work around the SA1111
520 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
521 * Chip Specification Update, June 2000, Erratum #7).
522 */
523 if (sachip->dev->dma_mask)
524 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
525
526 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
527}
528
529#endif
530
531static void sa1111_dev_release(struct device *_dev)
532{
533 struct sa1111_dev *dev = SA1111_DEV(_dev);
534
535 release_resource(&dev->res);
536 kfree(dev);
537}
538
539static int
540sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
541 struct sa1111_dev_info *info)
542{
543 struct sa1111_dev *dev;
544 int ret;
545
546 dev = kmalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
547 if (!dev) {
548 ret = -ENOMEM;
549 goto out;
550 }
551 memset(dev, 0, sizeof(struct sa1111_dev));
552
553 snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
554 "%4.4lx", info->offset);
555
556 dev->devid = info->devid;
557 dev->dev.parent = sachip->dev;
558 dev->dev.bus = &sa1111_bus_type;
559 dev->dev.release = sa1111_dev_release;
560 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
561 dev->res.start = sachip->phys + info->offset;
562 dev->res.end = dev->res.start + 511;
563 dev->res.name = dev->dev.bus_id;
564 dev->res.flags = IORESOURCE_MEM;
565 dev->mapbase = sachip->base + info->offset;
566 dev->skpcr_mask = info->skpcr_mask;
567 memmove(dev->irq, info->irq, sizeof(dev->irq));
568
569 ret = request_resource(parent, &dev->res);
570 if (ret) {
571 printk("SA1111: failed to allocate resource for %s\n",
572 dev->res.name);
573 kfree(dev);
574 goto out;
575 }
576
577
578 ret = device_register(&dev->dev);
579 if (ret) {
580 release_resource(&dev->res);
581 kfree(dev);
582 goto out;
583 }
584
585 /*
586 * If the parent device has a DMA mask associated with it,
587 * propagate it down to the children.
588 */
589 if (sachip->dev->dma_mask) {
590 dev->dma_mask = *sachip->dev->dma_mask;
591 dev->dev.dma_mask = &dev->dma_mask;
592
593 if (dev->dma_mask != 0xffffffffUL) {
594 ret = dmabounce_register_dev(&dev->dev, 1024, 4096);
595 if (ret) {
596 printk("SA1111: Failed to register %s with dmabounce", dev->dev.bus_id);
597 device_unregister(&dev->dev);
598 }
599 }
600 }
601
602out:
603 return ret;
604}
605
606/**
607 * sa1111_probe - probe for a single SA1111 chip.
608 * @phys_addr: physical address of device.
609 *
610 * Probe for a SA1111 chip. This must be called
611 * before any other SA1111-specific code.
612 *
613 * Returns:
614 * %-ENODEV device not found.
615 * %-EBUSY physical address already marked in-use.
616 * %0 successful.
617 */
618static int
619__sa1111_probe(struct device *me, struct resource *mem, int irq)
620{
621 struct sa1111 *sachip;
622 unsigned long id;
623 unsigned int has_devs, val;
624 int i, ret = -ENODEV;
625
626 sachip = kmalloc(sizeof(struct sa1111), GFP_KERNEL);
627 if (!sachip)
628 return -ENOMEM;
629
630 memset(sachip, 0, sizeof(struct sa1111));
631
632 spin_lock_init(&sachip->lock);
633
634 sachip->dev = me;
635 dev_set_drvdata(sachip->dev, sachip);
636
637 sachip->phys = mem->start;
638 sachip->irq = irq;
639
640 /*
641 * Map the whole region. This also maps the
642 * registers for our children.
643 */
644 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
645 if (!sachip->base) {
646 ret = -ENOMEM;
647 goto out;
648 }
649
650 /*
651 * Probe for the chip. Only touch the SBI registers.
652 */
653 id = sa1111_readl(sachip->base + SA1111_SKID);
654 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
655 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
656 ret = -ENODEV;
657 goto unmap;
658 }
659
660 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
661 "silicon revision %lx, metal revision %lx\n",
662 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
663
664 /*
665 * We found it. Wake the chip up, and initialise.
666 */
667 sa1111_wake(sachip);
668
669#ifdef CONFIG_ARCH_SA1100
670 /*
671 * The SDRAM configuration of the SA1110 and the SA1111 must
672 * match. This is very important to ensure that SA1111 accesses
673 * don't corrupt the SDRAM. Note that this ungates the SA1111's
674 * MBGNT signal, so we must have called sa1110_mb_disable()
675 * beforehand.
676 */
677 sa1111_configure_smc(sachip, 1,
678 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
679 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
680
681 /*
682 * We only need to turn on DCLK whenever we want to use the
683 * DMA. It can otherwise be held firmly in the off position.
684 * (currently, we always enable it.)
685 */
686 val = sa1111_readl(sachip->base + SA1111_SKPCR);
687 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
688
689 /*
690 * Enable the SA1110 memory bus request and grant signals.
691 */
692 sa1110_mb_enable();
693#endif
694
695 /*
696 * The interrupt controller must be initialised before any
697 * other device to ensure that the interrupts are available.
698 */
699 if (sachip->irq != NO_IRQ)
700 sa1111_setup_irq(sachip);
701
702 g_sa1111 = sachip;
703
704 has_devs = ~0;
705 if (machine_is_assabet() || machine_is_jornada720() ||
706 machine_is_badge4())
707 has_devs &= ~(1 << 4);
708 else
709 has_devs &= ~(1 << 1);
710
711 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
712 if (has_devs & (1 << i))
713 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
714
715 return 0;
716
717 unmap:
718 iounmap(sachip->base);
719 out:
720 kfree(sachip);
721 return ret;
722}
723
724static void __sa1111_remove(struct sa1111 *sachip)
725{
726 struct list_head *l, *n;
727 void __iomem *irqbase = sachip->base + SA1111_INTC;
728
729 list_for_each_safe(l, n, &sachip->dev->children) {
730 struct device *d = list_to_dev(l);
731
732 device_unregister(d);
733 }
734
735 /* disable all IRQs */
736 sa1111_writel(0, irqbase + SA1111_INTEN0);
737 sa1111_writel(0, irqbase + SA1111_INTEN1);
738 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
739 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
740
741 if (sachip->irq != NO_IRQ) {
742 set_irq_chained_handler(sachip->irq, NULL);
743 set_irq_data(sachip->irq, NULL);
744
745 release_mem_region(sachip->phys + SA1111_INTC, 512);
746 }
747
748 iounmap(sachip->base);
749 kfree(sachip);
750}
751
752/*
753 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
754 * Chip Specification Update" (June 2000), erratum #7, there is a
755 * significant bug in the SA1111 SDRAM shared memory controller. If
756 * an access to a region of memory above 1MB relative to the bank base,
757 * it is important that address bit 10 _NOT_ be asserted. Depending
758 * on the configuration of the RAM, bit 10 may correspond to one
759 * of several different (processor-relative) address bits.
760 *
761 * This routine only identifies whether or not a given DMA address
762 * is susceptible to the bug.
763 *
764 * This should only get called for sa1111_device types due to the
765 * way we configure our device dma_masks.
766 */
767int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
768{
769 /*
770 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
771 * User's Guide" mentions that jumpers R51 and R52 control the
772 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
773 * SDRAM bank 1 on Neponset). The default configuration selects
774 * Assabet, so any address in bank 1 is necessarily invalid.
775 */
776 return ((machine_is_assabet() || machine_is_pfs168()) &&
777 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000));
778}
779
780struct sa1111_save_data {
781 unsigned int skcr;
782 unsigned int skpcr;
783 unsigned int skcdr;
784 unsigned char skaud;
785 unsigned char skpwm0;
786 unsigned char skpwm1;
787
788 /*
789 * Interrupt controller
790 */
791 unsigned int intpol0;
792 unsigned int intpol1;
793 unsigned int inten0;
794 unsigned int inten1;
795 unsigned int wakepol0;
796 unsigned int wakepol1;
797 unsigned int wakeen0;
798 unsigned int wakeen1;
799};
800
801#ifdef CONFIG_PM
802
803static int sa1111_suspend(struct device *dev, pm_message_t state, u32 level)
804{
805 struct sa1111 *sachip = dev_get_drvdata(dev);
806 struct sa1111_save_data *save;
807 unsigned long flags;
808 unsigned int val;
809 void __iomem *base;
810
811 if (level != SUSPEND_DISABLE)
812 return 0;
813
814 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
815 if (!save)
816 return -ENOMEM;
817 dev->power.saved_state = save;
818
819 spin_lock_irqsave(&sachip->lock, flags);
820
821 /*
822 * Save state.
823 */
824 base = sachip->base;
825 save->skcr = sa1111_readl(base + SA1111_SKCR);
826 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
827 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
828 save->skaud = sa1111_readl(base + SA1111_SKAUD);
829 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
830 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
831
832 base = sachip->base + SA1111_INTC;
833 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
834 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
835 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
836 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
837 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
838 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
839 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
840 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
841
842 /*
843 * Disable.
844 */
845 val = sa1111_readl(sachip->base + SA1111_SKCR);
846 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
847 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
848 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
849
850 spin_unlock_irqrestore(&sachip->lock, flags);
851
852 return 0;
853}
854
855/*
856 * sa1111_resume - Restore the SA1111 device state.
857 * @dev: device to restore
858 * @level: resume level
859 *
860 * Restore the general state of the SA1111; clock control and
861 * interrupt controller. Other parts of the SA1111 must be
862 * restored by their respective drivers, and must be called
863 * via LDM after this function.
864 */
865static int sa1111_resume(struct device *dev, u32 level)
866{
867 struct sa1111 *sachip = dev_get_drvdata(dev);
868 struct sa1111_save_data *save;
869 unsigned long flags, id;
870 void __iomem *base;
871
872 if (level != RESUME_ENABLE)
873 return 0;
874
875 save = (struct sa1111_save_data *)dev->power.saved_state;
876 if (!save)
877 return 0;
878
879 spin_lock_irqsave(&sachip->lock, flags);
880
881 /*
882 * Ensure that the SA1111 is still here.
883 * FIXME: shouldn't do this here.
884 */
885 id = sa1111_readl(sachip->base + SA1111_SKID);
886 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
887 __sa1111_remove(sachip);
888 dev_set_drvdata(dev, NULL);
889 kfree(save);
890 return 0;
891 }
892
893 /*
894 * First of all, wake up the chip.
895 */
896 sa1111_wake(sachip);
897 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
898 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
899
900 base = sachip->base;
901 sa1111_writel(save->skcr, base + SA1111_SKCR);
902 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
903 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
904 sa1111_writel(save->skaud, base + SA1111_SKAUD);
905 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
906 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
907
908 base = sachip->base + SA1111_INTC;
909 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
910 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
911 sa1111_writel(save->inten0, base + SA1111_INTEN0);
912 sa1111_writel(save->inten1, base + SA1111_INTEN1);
913 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
914 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
915 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
916 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
917
918 spin_unlock_irqrestore(&sachip->lock, flags);
919
920 dev->power.saved_state = NULL;
921 kfree(save);
922
923 return 0;
924}
925
926#else
927#define sa1111_suspend NULL
928#define sa1111_resume NULL
929#endif
930
931static int sa1111_probe(struct device *dev)
932{
933 struct platform_device *pdev = to_platform_device(dev);
934 struct resource *mem;
935 int irq;
936
937 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
938 if (!mem)
939 return -EINVAL;
940 irq = platform_get_irq(pdev, 0);
941
942 return __sa1111_probe(dev, mem, irq);
943}
944
945static int sa1111_remove(struct device *dev)
946{
947 struct sa1111 *sachip = dev_get_drvdata(dev);
948
949 if (sachip) {
950 __sa1111_remove(sachip);
951 dev_set_drvdata(dev, NULL);
952
953#ifdef CONFIG_PM
954 kfree(dev->power.saved_state);
955 dev->power.saved_state = NULL;
956#endif
957 }
958
959 return 0;
960}
961
962/*
963 * Not sure if this should be on the system bus or not yet.
964 * We really want some way to register a system device at
965 * the per-machine level, and then have this driver pick
966 * up the registered devices.
967 *
968 * We also need to handle the SDRAM configuration for
969 * PXA250/SA1110 machine classes.
970 */
971static struct device_driver sa1111_device_driver = {
972 .name = "sa1111",
973 .bus = &platform_bus_type,
974 .probe = sa1111_probe,
975 .remove = sa1111_remove,
976 .suspend = sa1111_suspend,
977 .resume = sa1111_resume,
978};
979
980/*
981 * Get the parent device driver (us) structure
982 * from a child function device
983 */
984static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
985{
986 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
987}
988
989/*
990 * The bits in the opdiv field are non-linear.
991 */
992static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
993
994static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
995{
996 unsigned int skcdr, fbdiv, ipdiv, opdiv;
997
998 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
999
1000 fbdiv = (skcdr & 0x007f) + 2;
1001 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1002 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1003
1004 return 3686400 * fbdiv / (ipdiv * opdiv);
1005}
1006
1007/**
1008 * sa1111_pll_clock - return the current PLL clock frequency.
1009 * @sadev: SA1111 function block
1010 *
1011 * BUG: we should look at SKCR. We also blindly believe that
1012 * the chip is being fed with the 3.6864MHz clock.
1013 *
1014 * Returns the PLL clock in Hz.
1015 */
1016unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1017{
1018 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1019
1020 return __sa1111_pll_clock(sachip);
1021}
1022
1023/**
1024 * sa1111_select_audio_mode - select I2S or AC link mode
1025 * @sadev: SA1111 function block
1026 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1027 *
1028 * Frob the SKCR to select AC Link mode or I2S mode for
1029 * the audio block.
1030 */
1031void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1032{
1033 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1034 unsigned long flags;
1035 unsigned int val;
1036
1037 spin_lock_irqsave(&sachip->lock, flags);
1038
1039 val = sa1111_readl(sachip->base + SA1111_SKCR);
1040 if (mode == SA1111_AUDIO_I2S) {
1041 val &= ~SKCR_SELAC;
1042 } else {
1043 val |= SKCR_SELAC;
1044 }
1045 sa1111_writel(val, sachip->base + SA1111_SKCR);
1046
1047 spin_unlock_irqrestore(&sachip->lock, flags);
1048}
1049
1050/**
1051 * sa1111_set_audio_rate - set the audio sample rate
1052 * @sadev: SA1111 SAC function block
1053 * @rate: sample rate to select
1054 */
1055int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1056{
1057 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1058 unsigned int div;
1059
1060 if (sadev->devid != SA1111_DEVID_SAC)
1061 return -EINVAL;
1062
1063 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1064 if (div == 0)
1065 div = 1;
1066 if (div > 128)
1067 div = 128;
1068
1069 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1070
1071 return 0;
1072}
1073
1074/**
1075 * sa1111_get_audio_rate - get the audio sample rate
1076 * @sadev: SA1111 SAC function block device
1077 */
1078int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1079{
1080 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1081 unsigned long div;
1082
1083 if (sadev->devid != SA1111_DEVID_SAC)
1084 return -EINVAL;
1085
1086 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1087
1088 return __sa1111_pll_clock(sachip) / (256 * div);
1089}
1090
1091void sa1111_set_io_dir(struct sa1111_dev *sadev,
1092 unsigned int bits, unsigned int dir,
1093 unsigned int sleep_dir)
1094{
1095 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1096 unsigned long flags;
1097 unsigned int val;
1098 void __iomem *gpio = sachip->base + SA1111_GPIO;
1099
1100#define MODIFY_BITS(port, mask, dir) \
1101 if (mask) { \
1102 val = sa1111_readl(port); \
1103 val &= ~(mask); \
1104 val |= (dir) & (mask); \
1105 sa1111_writel(val, port); \
1106 }
1107
1108 spin_lock_irqsave(&sachip->lock, flags);
1109 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1110 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1111 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1112
1113 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1114 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1115 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1116 spin_unlock_irqrestore(&sachip->lock, flags);
1117}
1118
1119void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1120{
1121 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1122 unsigned long flags;
1123 unsigned int val;
1124 void __iomem *gpio = sachip->base + SA1111_GPIO;
1125
1126 spin_lock_irqsave(&sachip->lock, flags);
1127 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1128 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1129 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1130 spin_unlock_irqrestore(&sachip->lock, flags);
1131}
1132
1133void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1134{
1135 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1136 unsigned long flags;
1137 unsigned int val;
1138 void __iomem *gpio = sachip->base + SA1111_GPIO;
1139
1140 spin_lock_irqsave(&sachip->lock, flags);
1141 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1142 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1143 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1144 spin_unlock_irqrestore(&sachip->lock, flags);
1145}
1146
1147/*
1148 * Individual device operations.
1149 */
1150
1151/**
1152 * sa1111_enable_device - enable an on-chip SA1111 function block
1153 * @sadev: SA1111 function block device to enable
1154 */
1155void sa1111_enable_device(struct sa1111_dev *sadev)
1156{
1157 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1158 unsigned long flags;
1159 unsigned int val;
1160
1161 spin_lock_irqsave(&sachip->lock, flags);
1162 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1163 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1164 spin_unlock_irqrestore(&sachip->lock, flags);
1165}
1166
1167/**
1168 * sa1111_disable_device - disable an on-chip SA1111 function block
1169 * @sadev: SA1111 function block device to disable
1170 */
1171void sa1111_disable_device(struct sa1111_dev *sadev)
1172{
1173 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1174 unsigned long flags;
1175 unsigned int val;
1176
1177 spin_lock_irqsave(&sachip->lock, flags);
1178 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1179 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1180 spin_unlock_irqrestore(&sachip->lock, flags);
1181}
1182
1183/*
1184 * SA1111 "Register Access Bus."
1185 *
1186 * We model this as a regular bus type, and hang devices directly
1187 * off this.
1188 */
1189static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1190{
1191 struct sa1111_dev *dev = SA1111_DEV(_dev);
1192 struct sa1111_driver *drv = SA1111_DRV(_drv);
1193
1194 return dev->devid == drv->devid;
1195}
1196
1197static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1198{
1199 struct sa1111_dev *sadev = SA1111_DEV(dev);
1200 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1201 int ret = 0;
1202
1203 if (drv && drv->suspend)
1204 ret = drv->suspend(sadev, state);
1205 return ret;
1206}
1207
1208static int sa1111_bus_resume(struct device *dev)
1209{
1210 struct sa1111_dev *sadev = SA1111_DEV(dev);
1211 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1212 int ret = 0;
1213
1214 if (drv && drv->resume)
1215 ret = drv->resume(sadev);
1216 return ret;
1217}
1218
1219static int sa1111_bus_probe(struct device *dev)
1220{
1221 struct sa1111_dev *sadev = SA1111_DEV(dev);
1222 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1223 int ret = -ENODEV;
1224
1225 if (drv->probe)
1226 ret = drv->probe(sadev);
1227 return ret;
1228}
1229
1230static int sa1111_bus_remove(struct device *dev)
1231{
1232 struct sa1111_dev *sadev = SA1111_DEV(dev);
1233 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1234 int ret = 0;
1235
1236 if (drv->remove)
1237 ret = drv->remove(sadev);
1238 return ret;
1239}
1240
1241struct bus_type sa1111_bus_type = {
1242 .name = "sa1111-rab",
1243 .match = sa1111_match,
1244 .suspend = sa1111_bus_suspend,
1245 .resume = sa1111_bus_resume,
1246};
1247
1248int sa1111_driver_register(struct sa1111_driver *driver)
1249{
1250 driver->drv.probe = sa1111_bus_probe;
1251 driver->drv.remove = sa1111_bus_remove;
1252 driver->drv.bus = &sa1111_bus_type;
1253 return driver_register(&driver->drv);
1254}
1255
1256void sa1111_driver_unregister(struct sa1111_driver *driver)
1257{
1258 driver_unregister(&driver->drv);
1259}
1260
1261static int __init sa1111_init(void)
1262{
1263 int ret = bus_register(&sa1111_bus_type);
1264 if (ret == 0)
1265 driver_register(&sa1111_device_driver);
1266 return ret;
1267}
1268
1269static void __exit sa1111_exit(void)
1270{
1271 driver_unregister(&sa1111_device_driver);
1272 bus_unregister(&sa1111_bus_type);
1273}
1274
1275module_init(sa1111_init);
1276module_exit(sa1111_exit);
1277
1278MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1279MODULE_LICENSE("GPL");
1280
1281EXPORT_SYMBOL(sa1111_select_audio_mode);
1282EXPORT_SYMBOL(sa1111_set_audio_rate);
1283EXPORT_SYMBOL(sa1111_get_audio_rate);
1284EXPORT_SYMBOL(sa1111_set_io_dir);
1285EXPORT_SYMBOL(sa1111_set_io);
1286EXPORT_SYMBOL(sa1111_set_sleep_io);
1287EXPORT_SYMBOL(sa1111_enable_device);
1288EXPORT_SYMBOL(sa1111_disable_device);
1289EXPORT_SYMBOL(sa1111_pll_clock);
1290EXPORT_SYMBOL(sa1111_bus_type);
1291EXPORT_SYMBOL(sa1111_driver_register);
1292EXPORT_SYMBOL(sa1111_driver_unregister);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-06 00:29:54 -0500