2 * linux/arch/arm/common/sa1111.c
6 * Original code by John Dorsey
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.
12 * This file contains all generic SA1111 support.
14 * All initialization functions provided here are intended to be called
15 * from machine specific code with proper arguments when required.
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/irq.h>
20 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/errno.h>
23 #include <linux/ioport.h>
24 #include <linux/platform_device.h>
25 #include <linux/slab.h>
26 #include <linux/spinlock.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/clk.h>
31 #include <mach/hardware.h>
32 #include <asm/mach/irq.h>
33 #include <asm/mach-types.h>
34 #include <asm/sizes.h>
36 #include <asm/hardware/sa1111.h>
39 #define IRQ_GPAIN0 (0)
40 #define IRQ_GPAIN1 (1)
41 #define IRQ_GPAIN2 (2)
42 #define IRQ_GPAIN3 (3)
43 #define IRQ_GPBIN0 (4)
44 #define IRQ_GPBIN1 (5)
45 #define IRQ_GPBIN2 (6)
46 #define IRQ_GPBIN3 (7)
47 #define IRQ_GPBIN4 (8)
48 #define IRQ_GPBIN5 (9)
49 #define IRQ_GPCIN0 (10)
50 #define IRQ_GPCIN1 (11)
51 #define IRQ_GPCIN2 (12)
52 #define IRQ_GPCIN3 (13)
53 #define IRQ_GPCIN4 (14)
54 #define IRQ_GPCIN5 (15)
55 #define IRQ_GPCIN6 (16)
56 #define IRQ_GPCIN7 (17)
57 #define IRQ_MSTXINT (18)
58 #define IRQ_MSRXINT (19)
59 #define IRQ_MSSTOPERRINT (20)
60 #define IRQ_TPTXINT (21)
61 #define IRQ_TPRXINT (22)
62 #define IRQ_TPSTOPERRINT (23)
63 #define SSPXMTINT (24)
64 #define SSPRCVINT (25)
66 #define AUDXMTDMADONEA (32)
67 #define AUDRCVDMADONEA (33)
68 #define AUDXMTDMADONEB (34)
69 #define AUDRCVDMADONEB (35)
77 #define IRQ_USBPWR (43)
79 #define IRQ_HCIBUFFACC (45)
80 #define IRQ_HCIRMTWKP (46)
81 #define IRQ_NHCIMFCIR (47)
82 #define IRQ_USB_PORT_RESUME (48)
83 #define IRQ_S0_READY_NINT (49)
84 #define IRQ_S1_READY_NINT (50)
85 #define IRQ_S0_CD_VALID (51)
86 #define IRQ_S1_CD_VALID (52)
87 #define IRQ_S0_BVD1_STSCHG (53)
88 #define IRQ_S1_BVD1_STSCHG (54)
89 #define SA1111_IRQ_NR (55)
91 extern void sa1110_mb_enable(void);
92 extern void sa1110_mb_disable(void);
95 * We keep the following data for the overall SA1111. Note that the
96 * struct device and struct resource are "fake"; they should be supplied
97 * by the bus above us. However, in the interests of getting all SA1111
98 * drivers converted over to the device model, we provide this as an
99 * anchor point for all the other drivers.
106 int irq_base; /* base for cascaded on-chip IRQs */
109 struct sa1111_platform_data *pdata;
116 * We _really_ need to eliminate this. Its only users
117 * are the PWM and DMA checking code.
119 static struct sa1111 *g_sa1111;
121 struct sa1111_dev_info {
122 unsigned long offset;
123 unsigned long skpcr_mask;
129 static struct sa1111_dev_info sa1111_devices[] = {
131 .offset = SA1111_USB,
132 .skpcr_mask = SKPCR_UCLKEN,
134 .devid = SA1111_DEVID_USB,
146 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
148 .devid = SA1111_DEVID_SAC,
158 .skpcr_mask = SKPCR_SCLKEN,
159 .devid = SA1111_DEVID_SSP,
162 .offset = SA1111_KBD,
163 .skpcr_mask = SKPCR_PTCLKEN,
164 .devid = SA1111_DEVID_PS2_KBD,
171 .offset = SA1111_MSE,
172 .skpcr_mask = SKPCR_PMCLKEN,
173 .devid = SA1111_DEVID_PS2_MSE,
182 .devid = SA1111_DEVID_PCMCIA,
195 * SA1111 interrupt support. Since clearing an IRQ while there are
196 * active IRQs causes the interrupt output to pulse, the upper levels
197 * will call us again if there are more interrupts to process.
199 static void sa1111_irq_handler(struct irq_desc *desc)
201 unsigned int stat0, stat1, i;
202 struct sa1111 *sachip = irq_desc_get_handler_data(desc);
203 void __iomem *mapbase = sachip->base + SA1111_INTC;
205 stat0 = sa1111_readl(mapbase + SA1111_INTSTATCLR0);
206 stat1 = sa1111_readl(mapbase + SA1111_INTSTATCLR1);
208 sa1111_writel(stat0, mapbase + SA1111_INTSTATCLR0);
210 desc->irq_data.chip->irq_ack(&desc->irq_data);
212 sa1111_writel(stat1, mapbase + SA1111_INTSTATCLR1);
214 if (stat0 == 0 && stat1 == 0) {
219 for (i = 0; stat0; i++, stat0 >>= 1)
221 generic_handle_irq(i + sachip->irq_base);
223 for (i = 32; stat1; i++, stat1 >>= 1)
225 generic_handle_irq(i + sachip->irq_base);
227 /* For level-based interrupts */
228 desc->irq_data.chip->irq_unmask(&desc->irq_data);
231 #define SA1111_IRQMASK_LO(x) (1 << (x - sachip->irq_base))
232 #define SA1111_IRQMASK_HI(x) (1 << (x - sachip->irq_base - 32))
234 static void sa1111_ack_irq(struct irq_data *d)
238 static void sa1111_mask_lowirq(struct irq_data *d)
240 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
241 void __iomem *mapbase = sachip->base + SA1111_INTC;
244 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
245 ie0 &= ~SA1111_IRQMASK_LO(d->irq);
246 writel(ie0, mapbase + SA1111_INTEN0);
249 static void sa1111_unmask_lowirq(struct irq_data *d)
251 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
252 void __iomem *mapbase = sachip->base + SA1111_INTC;
255 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
256 ie0 |= SA1111_IRQMASK_LO(d->irq);
257 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
261 * Attempt to re-trigger the interrupt. The SA1111 contains a register
262 * (INTSET) which claims to do this. However, in practice no amount of
263 * manipulation of INTEN and INTSET guarantees that the interrupt will
264 * be triggered. In fact, its very difficult, if not impossible to get
265 * INTSET to re-trigger the interrupt.
267 static int sa1111_retrigger_lowirq(struct irq_data *d)
269 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
270 void __iomem *mapbase = sachip->base + SA1111_INTC;
271 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
275 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
276 for (i = 0; i < 8; i++) {
277 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
278 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
279 if (sa1111_readl(mapbase + SA1111_INTSTATCLR0) & mask)
284 pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n",
286 return i == 8 ? -1 : 0;
289 static int sa1111_type_lowirq(struct irq_data *d, unsigned int flags)
291 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
292 void __iomem *mapbase = sachip->base + SA1111_INTC;
293 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
296 if (flags == IRQ_TYPE_PROBE)
299 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
302 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
303 if (flags & IRQ_TYPE_EDGE_RISING)
307 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
308 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
313 static int sa1111_wake_lowirq(struct irq_data *d, unsigned int on)
315 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
316 void __iomem *mapbase = sachip->base + SA1111_INTC;
317 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
320 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
325 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
330 static struct irq_chip sa1111_low_chip = {
332 .irq_ack = sa1111_ack_irq,
333 .irq_mask = sa1111_mask_lowirq,
334 .irq_unmask = sa1111_unmask_lowirq,
335 .irq_retrigger = sa1111_retrigger_lowirq,
336 .irq_set_type = sa1111_type_lowirq,
337 .irq_set_wake = sa1111_wake_lowirq,
340 static void sa1111_mask_highirq(struct irq_data *d)
342 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
343 void __iomem *mapbase = sachip->base + SA1111_INTC;
346 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
347 ie1 &= ~SA1111_IRQMASK_HI(d->irq);
348 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
351 static void sa1111_unmask_highirq(struct irq_data *d)
353 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
354 void __iomem *mapbase = sachip->base + SA1111_INTC;
357 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
358 ie1 |= SA1111_IRQMASK_HI(d->irq);
359 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
363 * Attempt to re-trigger the interrupt. The SA1111 contains a register
364 * (INTSET) which claims to do this. However, in practice no amount of
365 * manipulation of INTEN and INTSET guarantees that the interrupt will
366 * be triggered. In fact, its very difficult, if not impossible to get
367 * INTSET to re-trigger the interrupt.
369 static int sa1111_retrigger_highirq(struct irq_data *d)
371 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
372 void __iomem *mapbase = sachip->base + SA1111_INTC;
373 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
377 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
378 for (i = 0; i < 8; i++) {
379 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
380 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
381 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
386 pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n",
388 return i == 8 ? -1 : 0;
391 static int sa1111_type_highirq(struct irq_data *d, unsigned int flags)
393 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
394 void __iomem *mapbase = sachip->base + SA1111_INTC;
395 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
398 if (flags == IRQ_TYPE_PROBE)
401 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
404 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
405 if (flags & IRQ_TYPE_EDGE_RISING)
409 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
410 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
415 static int sa1111_wake_highirq(struct irq_data *d, unsigned int on)
417 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
418 void __iomem *mapbase = sachip->base + SA1111_INTC;
419 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
422 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
427 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
432 static struct irq_chip sa1111_high_chip = {
434 .irq_ack = sa1111_ack_irq,
435 .irq_mask = sa1111_mask_highirq,
436 .irq_unmask = sa1111_unmask_highirq,
437 .irq_retrigger = sa1111_retrigger_highirq,
438 .irq_set_type = sa1111_type_highirq,
439 .irq_set_wake = sa1111_wake_highirq,
442 static int sa1111_setup_irq(struct sa1111 *sachip, unsigned irq_base)
444 void __iomem *irqbase = sachip->base + SA1111_INTC;
449 * We're guaranteed that this region hasn't been taken.
451 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
453 ret = irq_alloc_descs(-1, irq_base, SA1111_IRQ_NR, -1);
455 dev_err(sachip->dev, "unable to allocate %u irqs: %d\n",
462 sachip->irq_base = ret;
464 /* disable all IRQs */
465 sa1111_writel(0, irqbase + SA1111_INTEN0);
466 sa1111_writel(0, irqbase + SA1111_INTEN1);
467 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
468 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
471 * detect on rising edge. Note: Feb 2001 Errata for SA1111
472 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
474 sa1111_writel(0, irqbase + SA1111_INTPOL0);
475 sa1111_writel(BIT(IRQ_S0_READY_NINT & 31) |
476 BIT(IRQ_S1_READY_NINT & 31),
477 irqbase + SA1111_INTPOL1);
480 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
481 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
483 for (i = IRQ_GPAIN0; i <= SSPROR; i++) {
484 irq = sachip->irq_base + i;
485 irq_set_chip_and_handler(irq, &sa1111_low_chip,
487 irq_set_chip_data(irq, sachip);
488 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
491 for (i = AUDXMTDMADONEA; i <= IRQ_S1_BVD1_STSCHG; i++) {
492 irq = sachip->irq_base + i;
493 irq_set_chip_and_handler(irq, &sa1111_high_chip,
495 irq_set_chip_data(irq, sachip);
496 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
500 * Register SA1111 interrupt
502 irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING);
503 irq_set_chained_handler_and_data(sachip->irq, sa1111_irq_handler,
506 dev_info(sachip->dev, "Providing IRQ%u-%u\n",
507 sachip->irq_base, sachip->irq_base + SA1111_IRQ_NR - 1);
513 * Bring the SA1111 out of reset. This requires a set procedure:
514 * 1. nRESET asserted (by hardware)
515 * 2. CLK turned on from SA1110
516 * 3. nRESET deasserted
517 * 4. VCO turned on, PLL_BYPASS turned off
518 * 5. Wait lock time, then assert RCLKEn
519 * 7. PCR set to allow clocking of individual functions
521 * Until we've done this, the only registers we can access are:
526 static void sa1111_wake(struct sa1111 *sachip)
528 unsigned long flags, r;
530 spin_lock_irqsave(&sachip->lock, flags);
532 clk_enable(sachip->clk);
535 * Turn VCO on, and disable PLL Bypass.
537 r = sa1111_readl(sachip->base + SA1111_SKCR);
539 sa1111_writel(r, sachip->base + SA1111_SKCR);
540 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
541 sa1111_writel(r, sachip->base + SA1111_SKCR);
544 * Wait lock time. SA1111 manual _doesn't_
545 * specify a figure for this! We choose 100us.
550 * Enable RCLK. We also ensure that RDYEN is set.
552 r |= SKCR_RCLKEN | SKCR_RDYEN;
553 sa1111_writel(r, sachip->base + SA1111_SKCR);
556 * Wait 14 RCLK cycles for the chip to finish coming out
557 * of reset. (RCLK=24MHz). This is 590ns.
562 * Ensure all clocks are initially off.
564 sa1111_writel(0, sachip->base + SA1111_SKPCR);
566 spin_unlock_irqrestore(&sachip->lock, flags);
569 #ifdef CONFIG_ARCH_SA1100
571 static u32 sa1111_dma_mask[] = {
583 * Configure the SA1111 shared memory controller.
586 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
587 unsigned int cas_latency)
589 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
591 if (cas_latency == 3)
594 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
597 * Now clear the bits in the DMA mask to work around the SA1111
598 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
599 * Chip Specification Update, June 2000, Erratum #7).
601 if (sachip->dev->dma_mask)
602 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
604 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
608 static void sa1111_dev_release(struct device *_dev)
610 struct sa1111_dev *dev = SA1111_DEV(_dev);
616 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
617 struct sa1111_dev_info *info)
619 struct sa1111_dev *dev;
623 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
629 device_initialize(&dev->dev);
630 dev_set_name(&dev->dev, "%4.4lx", info->offset);
631 dev->devid = info->devid;
632 dev->dev.parent = sachip->dev;
633 dev->dev.bus = &sa1111_bus_type;
634 dev->dev.release = sa1111_dev_release;
635 dev->res.start = sachip->phys + info->offset;
636 dev->res.end = dev->res.start + 511;
637 dev->res.name = dev_name(&dev->dev);
638 dev->res.flags = IORESOURCE_MEM;
639 dev->mapbase = sachip->base + info->offset;
640 dev->skpcr_mask = info->skpcr_mask;
642 for (i = 0; i < ARRAY_SIZE(info->irq); i++)
643 dev->irq[i] = sachip->irq_base + info->irq[i];
646 * If the parent device has a DMA mask associated with it, and
647 * this child supports DMA, propagate it down to the children.
649 if (info->dma && sachip->dev->dma_mask) {
650 dev->dma_mask = *sachip->dev->dma_mask;
651 dev->dev.dma_mask = &dev->dma_mask;
652 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
655 ret = request_resource(parent, &dev->res);
657 dev_err(sachip->dev, "failed to allocate resource for %s\n",
662 ret = device_add(&dev->dev);
668 release_resource(&dev->res);
670 put_device(&dev->dev);
676 * sa1111_probe - probe for a single SA1111 chip.
677 * @phys_addr: physical address of device.
679 * Probe for a SA1111 chip. This must be called
680 * before any other SA1111-specific code.
683 * %-ENODEV device not found.
684 * %-EBUSY physical address already marked in-use.
685 * %-EINVAL no platform data passed
688 static int __sa1111_probe(struct device *me, struct resource *mem, int irq)
690 struct sa1111_platform_data *pd = me->platform_data;
691 struct sa1111 *sachip;
693 unsigned int has_devs;
694 int i, ret = -ENODEV;
699 sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL);
703 sachip->clk = clk_get(me, "SA1111_CLK");
704 if (IS_ERR(sachip->clk)) {
705 ret = PTR_ERR(sachip->clk);
709 ret = clk_prepare(sachip->clk);
713 spin_lock_init(&sachip->lock);
716 dev_set_drvdata(sachip->dev, sachip);
719 sachip->phys = mem->start;
723 * Map the whole region. This also maps the
724 * registers for our children.
726 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
733 * Probe for the chip. Only touch the SBI registers.
735 id = sa1111_readl(sachip->base + SA1111_SKID);
736 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
737 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
742 pr_info("SA1111 Microprocessor Companion Chip: silicon revision %lx, metal revision %lx\n",
743 (id & SKID_SIREV_MASK) >> 4, id & SKID_MTREV_MASK);
746 * We found it. Wake the chip up, and initialise.
751 * The interrupt controller must be initialised before any
752 * other device to ensure that the interrupts are available.
754 if (sachip->irq != NO_IRQ) {
755 ret = sa1111_setup_irq(sachip, pd->irq_base);
760 #ifdef CONFIG_ARCH_SA1100
765 * The SDRAM configuration of the SA1110 and the SA1111 must
766 * match. This is very important to ensure that SA1111 accesses
767 * don't corrupt the SDRAM. Note that this ungates the SA1111's
768 * MBGNT signal, so we must have called sa1110_mb_disable()
771 sa1111_configure_smc(sachip, 1,
772 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
773 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
776 * We only need to turn on DCLK whenever we want to use the
777 * DMA. It can otherwise be held firmly in the off position.
778 * (currently, we always enable it.)
780 val = sa1111_readl(sachip->base + SA1111_SKPCR);
781 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
784 * Enable the SA1110 memory bus request and grant signals.
794 has_devs &= ~pd->disable_devs;
796 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
797 if (sa1111_devices[i].devid & has_devs)
798 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
803 clk_disable(sachip->clk);
805 iounmap(sachip->base);
807 clk_unprepare(sachip->clk);
809 clk_put(sachip->clk);
815 static int sa1111_remove_one(struct device *dev, void *data)
817 struct sa1111_dev *sadev = SA1111_DEV(dev);
818 device_del(&sadev->dev);
819 release_resource(&sadev->res);
820 put_device(&sadev->dev);
824 static void __sa1111_remove(struct sa1111 *sachip)
826 void __iomem *irqbase = sachip->base + SA1111_INTC;
828 device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
830 /* disable all IRQs */
831 sa1111_writel(0, irqbase + SA1111_INTEN0);
832 sa1111_writel(0, irqbase + SA1111_INTEN1);
833 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
834 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
836 clk_disable(sachip->clk);
837 clk_unprepare(sachip->clk);
839 if (sachip->irq != NO_IRQ) {
840 irq_set_chained_handler_and_data(sachip->irq, NULL, NULL);
841 irq_free_descs(sachip->irq_base, SA1111_IRQ_NR);
843 release_mem_region(sachip->phys + SA1111_INTC, 512);
846 iounmap(sachip->base);
847 clk_put(sachip->clk);
851 struct sa1111_save_data {
856 unsigned char skpwm0;
857 unsigned char skpwm1;
860 * Interrupt controller
862 unsigned int intpol0;
863 unsigned int intpol1;
866 unsigned int wakepol0;
867 unsigned int wakepol1;
868 unsigned int wakeen0;
869 unsigned int wakeen1;
874 static int sa1111_suspend_noirq(struct device *dev)
876 struct sa1111 *sachip = dev_get_drvdata(dev);
877 struct sa1111_save_data *save;
882 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
885 sachip->saved_state = save;
887 spin_lock_irqsave(&sachip->lock, flags);
893 save->skcr = sa1111_readl(base + SA1111_SKCR);
894 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
895 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
896 save->skaud = sa1111_readl(base + SA1111_SKAUD);
897 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
898 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
900 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
901 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
903 base = sachip->base + SA1111_INTC;
904 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
905 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
906 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
907 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
908 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
909 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
910 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
911 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
916 val = sa1111_readl(sachip->base + SA1111_SKCR);
917 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
919 clk_disable(sachip->clk);
921 spin_unlock_irqrestore(&sachip->lock, flags);
923 #ifdef CONFIG_ARCH_SA1100
931 * sa1111_resume - Restore the SA1111 device state.
932 * @dev: device to restore
934 * Restore the general state of the SA1111; clock control and
935 * interrupt controller. Other parts of the SA1111 must be
936 * restored by their respective drivers, and must be called
937 * via LDM after this function.
939 static int sa1111_resume_noirq(struct device *dev)
941 struct sa1111 *sachip = dev_get_drvdata(dev);
942 struct sa1111_save_data *save;
943 unsigned long flags, id;
946 save = sachip->saved_state;
951 * Ensure that the SA1111 is still here.
952 * FIXME: shouldn't do this here.
954 id = sa1111_readl(sachip->base + SA1111_SKID);
955 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
956 __sa1111_remove(sachip);
957 dev_set_drvdata(dev, NULL);
963 * First of all, wake up the chip.
967 #ifdef CONFIG_ARCH_SA1100
968 /* Enable the memory bus request/grant signals */
973 * Only lock for write ops. Also, sa1111_wake must be called with
976 spin_lock_irqsave(&sachip->lock, flags);
978 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
979 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
982 sa1111_writel(save->skcr, base + SA1111_SKCR);
983 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
984 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
985 sa1111_writel(save->skaud, base + SA1111_SKAUD);
986 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
987 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
989 base = sachip->base + SA1111_INTC;
990 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
991 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
992 sa1111_writel(save->inten0, base + SA1111_INTEN0);
993 sa1111_writel(save->inten1, base + SA1111_INTEN1);
994 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
995 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
996 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
997 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
999 spin_unlock_irqrestore(&sachip->lock, flags);
1001 sachip->saved_state = NULL;
1008 #define sa1111_suspend_noirq NULL
1009 #define sa1111_resume_noirq NULL
1012 static int sa1111_probe(struct platform_device *pdev)
1014 struct resource *mem;
1017 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1020 irq = platform_get_irq(pdev, 0);
1024 return __sa1111_probe(&pdev->dev, mem, irq);
1027 static int sa1111_remove(struct platform_device *pdev)
1029 struct sa1111 *sachip = platform_get_drvdata(pdev);
1033 kfree(sachip->saved_state);
1034 sachip->saved_state = NULL;
1036 __sa1111_remove(sachip);
1037 platform_set_drvdata(pdev, NULL);
1043 static struct dev_pm_ops sa1111_pm_ops = {
1044 .suspend_noirq = sa1111_suspend_noirq,
1045 .resume_noirq = sa1111_resume_noirq,
1049 * Not sure if this should be on the system bus or not yet.
1050 * We really want some way to register a system device at
1051 * the per-machine level, and then have this driver pick
1052 * up the registered devices.
1054 * We also need to handle the SDRAM configuration for
1055 * PXA250/SA1110 machine classes.
1057 static struct platform_driver sa1111_device_driver = {
1058 .probe = sa1111_probe,
1059 .remove = sa1111_remove,
1062 .pm = &sa1111_pm_ops,
1067 * Get the parent device driver (us) structure
1068 * from a child function device
1070 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
1072 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
1076 * The bits in the opdiv field are non-linear.
1078 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
1080 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
1082 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1084 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
1086 fbdiv = (skcdr & 0x007f) + 2;
1087 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1088 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1090 return 3686400 * fbdiv / (ipdiv * opdiv);
1094 * sa1111_pll_clock - return the current PLL clock frequency.
1095 * @sadev: SA1111 function block
1097 * BUG: we should look at SKCR. We also blindly believe that
1098 * the chip is being fed with the 3.6864MHz clock.
1100 * Returns the PLL clock in Hz.
1102 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1104 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1106 return __sa1111_pll_clock(sachip);
1108 EXPORT_SYMBOL(sa1111_pll_clock);
1111 * sa1111_select_audio_mode - select I2S or AC link mode
1112 * @sadev: SA1111 function block
1113 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1115 * Frob the SKCR to select AC Link mode or I2S mode for
1118 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1120 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1121 unsigned long flags;
1124 spin_lock_irqsave(&sachip->lock, flags);
1126 val = sa1111_readl(sachip->base + SA1111_SKCR);
1127 if (mode == SA1111_AUDIO_I2S) {
1132 sa1111_writel(val, sachip->base + SA1111_SKCR);
1134 spin_unlock_irqrestore(&sachip->lock, flags);
1136 EXPORT_SYMBOL(sa1111_select_audio_mode);
1139 * sa1111_set_audio_rate - set the audio sample rate
1140 * @sadev: SA1111 SAC function block
1141 * @rate: sample rate to select
1143 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1145 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1148 if (sadev->devid != SA1111_DEVID_SAC)
1151 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1157 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1161 EXPORT_SYMBOL(sa1111_set_audio_rate);
1164 * sa1111_get_audio_rate - get the audio sample rate
1165 * @sadev: SA1111 SAC function block device
1167 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1169 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1172 if (sadev->devid != SA1111_DEVID_SAC)
1175 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1177 return __sa1111_pll_clock(sachip) / (256 * div);
1179 EXPORT_SYMBOL(sa1111_get_audio_rate);
1181 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1182 unsigned int bits, unsigned int dir,
1183 unsigned int sleep_dir)
1185 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1186 unsigned long flags;
1188 void __iomem *gpio = sachip->base + SA1111_GPIO;
1190 #define MODIFY_BITS(port, mask, dir) \
1192 val = sa1111_readl(port); \
1194 val |= (dir) & (mask); \
1195 sa1111_writel(val, port); \
1198 spin_lock_irqsave(&sachip->lock, flags);
1199 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1200 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1201 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1203 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1204 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1205 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1206 spin_unlock_irqrestore(&sachip->lock, flags);
1208 EXPORT_SYMBOL(sa1111_set_io_dir);
1210 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1212 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1213 unsigned long flags;
1215 void __iomem *gpio = sachip->base + SA1111_GPIO;
1217 spin_lock_irqsave(&sachip->lock, flags);
1218 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1219 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1220 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1221 spin_unlock_irqrestore(&sachip->lock, flags);
1223 EXPORT_SYMBOL(sa1111_set_io);
1225 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1227 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1228 unsigned long flags;
1230 void __iomem *gpio = sachip->base + SA1111_GPIO;
1232 spin_lock_irqsave(&sachip->lock, flags);
1233 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1234 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1235 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1236 spin_unlock_irqrestore(&sachip->lock, flags);
1238 EXPORT_SYMBOL(sa1111_set_sleep_io);
1241 * Individual device operations.
1245 * sa1111_enable_device - enable an on-chip SA1111 function block
1246 * @sadev: SA1111 function block device to enable
1248 int sa1111_enable_device(struct sa1111_dev *sadev)
1250 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1251 unsigned long flags;
1255 if (sachip->pdata && sachip->pdata->enable)
1256 ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid);
1259 spin_lock_irqsave(&sachip->lock, flags);
1260 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1261 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1262 spin_unlock_irqrestore(&sachip->lock, flags);
1266 EXPORT_SYMBOL(sa1111_enable_device);
1269 * sa1111_disable_device - disable an on-chip SA1111 function block
1270 * @sadev: SA1111 function block device to disable
1272 void sa1111_disable_device(struct sa1111_dev *sadev)
1274 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1275 unsigned long flags;
1278 spin_lock_irqsave(&sachip->lock, flags);
1279 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1280 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1281 spin_unlock_irqrestore(&sachip->lock, flags);
1283 if (sachip->pdata && sachip->pdata->disable)
1284 sachip->pdata->disable(sachip->pdata->data, sadev->devid);
1286 EXPORT_SYMBOL(sa1111_disable_device);
1289 * SA1111 "Register Access Bus."
1291 * We model this as a regular bus type, and hang devices directly
1294 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1296 struct sa1111_dev *dev = SA1111_DEV(_dev);
1297 struct sa1111_driver *drv = SA1111_DRV(_drv);
1299 return !!(dev->devid & drv->devid);
1302 static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1304 struct sa1111_dev *sadev = SA1111_DEV(dev);
1305 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1308 if (drv && drv->suspend)
1309 ret = drv->suspend(sadev, state);
1313 static int sa1111_bus_resume(struct device *dev)
1315 struct sa1111_dev *sadev = SA1111_DEV(dev);
1316 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1319 if (drv && drv->resume)
1320 ret = drv->resume(sadev);
1324 static void sa1111_bus_shutdown(struct device *dev)
1326 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1328 if (drv && drv->shutdown)
1329 drv->shutdown(SA1111_DEV(dev));
1332 static int sa1111_bus_probe(struct device *dev)
1334 struct sa1111_dev *sadev = SA1111_DEV(dev);
1335 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1339 ret = drv->probe(sadev);
1343 static int sa1111_bus_remove(struct device *dev)
1345 struct sa1111_dev *sadev = SA1111_DEV(dev);
1346 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1350 ret = drv->remove(sadev);
1354 struct bus_type sa1111_bus_type = {
1355 .name = "sa1111-rab",
1356 .match = sa1111_match,
1357 .probe = sa1111_bus_probe,
1358 .remove = sa1111_bus_remove,
1359 .suspend = sa1111_bus_suspend,
1360 .resume = sa1111_bus_resume,
1361 .shutdown = sa1111_bus_shutdown,
1363 EXPORT_SYMBOL(sa1111_bus_type);
1365 int sa1111_driver_register(struct sa1111_driver *driver)
1367 driver->drv.bus = &sa1111_bus_type;
1368 return driver_register(&driver->drv);
1370 EXPORT_SYMBOL(sa1111_driver_register);
1372 void sa1111_driver_unregister(struct sa1111_driver *driver)
1374 driver_unregister(&driver->drv);
1376 EXPORT_SYMBOL(sa1111_driver_unregister);
1378 #ifdef CONFIG_DMABOUNCE
1380 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
1381 * Chip Specification Update" (June 2000), erratum #7, there is a
1382 * significant bug in the SA1111 SDRAM shared memory controller. If
1383 * an access to a region of memory above 1MB relative to the bank base,
1384 * it is important that address bit 10 _NOT_ be asserted. Depending
1385 * on the configuration of the RAM, bit 10 may correspond to one
1386 * of several different (processor-relative) address bits.
1388 * This routine only identifies whether or not a given DMA address
1389 * is susceptible to the bug.
1391 * This should only get called for sa1111_device types due to the
1392 * way we configure our device dma_masks.
1394 static int sa1111_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
1397 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
1398 * User's Guide" mentions that jumpers R51 and R52 control the
1399 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
1400 * SDRAM bank 1 on Neponset). The default configuration selects
1401 * Assabet, so any address in bank 1 is necessarily invalid.
1403 return (machine_is_assabet() || machine_is_pfs168()) &&
1404 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000);
1407 static int sa1111_notifier_call(struct notifier_block *n, unsigned long action,
1410 struct sa1111_dev *dev = SA1111_DEV(data);
1413 case BUS_NOTIFY_ADD_DEVICE:
1414 if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) {
1415 int ret = dmabounce_register_dev(&dev->dev, 1024, 4096,
1416 sa1111_needs_bounce);
1418 dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret);
1422 case BUS_NOTIFY_DEL_DEVICE:
1423 if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL)
1424 dmabounce_unregister_dev(&dev->dev);
1430 static struct notifier_block sa1111_bus_notifier = {
1431 .notifier_call = sa1111_notifier_call,
1435 static int __init sa1111_init(void)
1437 int ret = bus_register(&sa1111_bus_type);
1438 #ifdef CONFIG_DMABOUNCE
1440 bus_register_notifier(&sa1111_bus_type, &sa1111_bus_notifier);
1443 platform_driver_register(&sa1111_device_driver);
1447 static void __exit sa1111_exit(void)
1449 platform_driver_unregister(&sa1111_device_driver);
1450 #ifdef CONFIG_DMABOUNCE
1451 bus_unregister_notifier(&sa1111_bus_type, &sa1111_bus_notifier);
1453 bus_unregister(&sa1111_bus_type);
1456 subsys_initcall(sa1111_init);
1457 module_exit(sa1111_exit);
1459 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1460 MODULE_LICENSE("GPL");