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.
200 sa1111_irq_handler(unsigned int irq, struct irq_desc *desc)
202 unsigned int stat0, stat1, i;
203 struct sa1111 *sachip = irq_get_handler_data(irq);
204 void __iomem *mapbase = sachip->base + SA1111_INTC;
206 stat0 = sa1111_readl(mapbase + SA1111_INTSTATCLR0);
207 stat1 = sa1111_readl(mapbase + SA1111_INTSTATCLR1);
209 sa1111_writel(stat0, mapbase + SA1111_INTSTATCLR0);
211 desc->irq_data.chip->irq_ack(&desc->irq_data);
213 sa1111_writel(stat1, mapbase + SA1111_INTSTATCLR1);
215 if (stat0 == 0 && stat1 == 0) {
216 do_bad_IRQ(irq, desc);
220 for (i = 0; stat0; i++, stat0 >>= 1)
222 generic_handle_irq(i + sachip->irq_base);
224 for (i = 32; stat1; i++, stat1 >>= 1)
226 generic_handle_irq(i + sachip->irq_base);
228 /* For level-based interrupts */
229 desc->irq_data.chip->irq_unmask(&desc->irq_data);
232 #define SA1111_IRQMASK_LO(x) (1 << (x - sachip->irq_base))
233 #define SA1111_IRQMASK_HI(x) (1 << (x - sachip->irq_base - 32))
235 static void sa1111_ack_irq(struct irq_data *d)
239 static void sa1111_mask_lowirq(struct irq_data *d)
241 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
242 void __iomem *mapbase = sachip->base + SA1111_INTC;
245 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
246 ie0 &= ~SA1111_IRQMASK_LO(d->irq);
247 writel(ie0, mapbase + SA1111_INTEN0);
250 static void sa1111_unmask_lowirq(struct irq_data *d)
252 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
253 void __iomem *mapbase = sachip->base + SA1111_INTC;
256 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
257 ie0 |= SA1111_IRQMASK_LO(d->irq);
258 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
262 * Attempt to re-trigger the interrupt. The SA1111 contains a register
263 * (INTSET) which claims to do this. However, in practice no amount of
264 * manipulation of INTEN and INTSET guarantees that the interrupt will
265 * be triggered. In fact, its very difficult, if not impossible to get
266 * INTSET to re-trigger the interrupt.
268 static int sa1111_retrigger_lowirq(struct irq_data *d)
270 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
271 void __iomem *mapbase = sachip->base + SA1111_INTC;
272 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
276 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
277 for (i = 0; i < 8; i++) {
278 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
279 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
280 if (sa1111_readl(mapbase + SA1111_INTSTATCLR0) & mask)
285 printk(KERN_ERR "Danger Will Robinson: failed to "
286 "re-trigger IRQ%d\n", d->irq);
287 return i == 8 ? -1 : 0;
290 static int sa1111_type_lowirq(struct irq_data *d, unsigned int flags)
292 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
293 void __iomem *mapbase = sachip->base + SA1111_INTC;
294 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
297 if (flags == IRQ_TYPE_PROBE)
300 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
303 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
304 if (flags & IRQ_TYPE_EDGE_RISING)
308 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
309 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
314 static int sa1111_wake_lowirq(struct irq_data *d, unsigned int on)
316 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
317 void __iomem *mapbase = sachip->base + SA1111_INTC;
318 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
321 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
326 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
331 static struct irq_chip sa1111_low_chip = {
333 .irq_ack = sa1111_ack_irq,
334 .irq_mask = sa1111_mask_lowirq,
335 .irq_unmask = sa1111_unmask_lowirq,
336 .irq_retrigger = sa1111_retrigger_lowirq,
337 .irq_set_type = sa1111_type_lowirq,
338 .irq_set_wake = sa1111_wake_lowirq,
341 static void sa1111_mask_highirq(struct irq_data *d)
343 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
344 void __iomem *mapbase = sachip->base + SA1111_INTC;
347 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
348 ie1 &= ~SA1111_IRQMASK_HI(d->irq);
349 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
352 static void sa1111_unmask_highirq(struct irq_data *d)
354 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
355 void __iomem *mapbase = sachip->base + SA1111_INTC;
358 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
359 ie1 |= SA1111_IRQMASK_HI(d->irq);
360 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
364 * Attempt to re-trigger the interrupt. The SA1111 contains a register
365 * (INTSET) which claims to do this. However, in practice no amount of
366 * manipulation of INTEN and INTSET guarantees that the interrupt will
367 * be triggered. In fact, its very difficult, if not impossible to get
368 * INTSET to re-trigger the interrupt.
370 static int sa1111_retrigger_highirq(struct irq_data *d)
372 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
373 void __iomem *mapbase = sachip->base + SA1111_INTC;
374 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
378 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
379 for (i = 0; i < 8; i++) {
380 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
381 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
382 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
387 printk(KERN_ERR "Danger Will Robinson: failed to "
388 "re-trigger IRQ%d\n", d->irq);
389 return i == 8 ? -1 : 0;
392 static int sa1111_type_highirq(struct irq_data *d, unsigned int flags)
394 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
395 void __iomem *mapbase = sachip->base + SA1111_INTC;
396 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
399 if (flags == IRQ_TYPE_PROBE)
402 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
405 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
406 if (flags & IRQ_TYPE_EDGE_RISING)
410 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
411 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
416 static int sa1111_wake_highirq(struct irq_data *d, unsigned int on)
418 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
419 void __iomem *mapbase = sachip->base + SA1111_INTC;
420 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
423 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
428 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
433 static struct irq_chip sa1111_high_chip = {
435 .irq_ack = sa1111_ack_irq,
436 .irq_mask = sa1111_mask_highirq,
437 .irq_unmask = sa1111_unmask_highirq,
438 .irq_retrigger = sa1111_retrigger_highirq,
439 .irq_set_type = sa1111_type_highirq,
440 .irq_set_wake = sa1111_wake_highirq,
443 static int sa1111_setup_irq(struct sa1111 *sachip, unsigned irq_base)
445 void __iomem *irqbase = sachip->base + SA1111_INTC;
450 * We're guaranteed that this region hasn't been taken.
452 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
454 ret = irq_alloc_descs(-1, irq_base, SA1111_IRQ_NR, -1);
456 dev_err(sachip->dev, "unable to allocate %u irqs: %d\n",
463 sachip->irq_base = ret;
465 /* disable all IRQs */
466 sa1111_writel(0, irqbase + SA1111_INTEN0);
467 sa1111_writel(0, irqbase + SA1111_INTEN1);
468 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
469 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
472 * detect on rising edge. Note: Feb 2001 Errata for SA1111
473 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
475 sa1111_writel(0, irqbase + SA1111_INTPOL0);
476 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
477 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
478 irqbase + SA1111_INTPOL1);
481 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
482 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
484 for (i = IRQ_GPAIN0; i <= SSPROR; i++) {
485 irq = sachip->irq_base + i;
486 irq_set_chip_and_handler(irq, &sa1111_low_chip,
488 irq_set_chip_data(irq, sachip);
489 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
492 for (i = AUDXMTDMADONEA; i <= IRQ_S1_BVD1_STSCHG; i++) {
493 irq = sachip->irq_base + i;
494 irq_set_chip_and_handler(irq, &sa1111_high_chip,
496 irq_set_chip_data(irq, sachip);
497 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
501 * Register SA1111 interrupt
503 irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING);
504 irq_set_handler_data(sachip->irq, sachip);
505 irq_set_chained_handler(sachip->irq, sa1111_irq_handler);
507 dev_info(sachip->dev, "Providing IRQ%u-%u\n",
508 sachip->irq_base, sachip->irq_base + SA1111_IRQ_NR - 1);
514 * Bring the SA1111 out of reset. This requires a set procedure:
515 * 1. nRESET asserted (by hardware)
516 * 2. CLK turned on from SA1110
517 * 3. nRESET deasserted
518 * 4. VCO turned on, PLL_BYPASS turned off
519 * 5. Wait lock time, then assert RCLKEn
520 * 7. PCR set to allow clocking of individual functions
522 * Until we've done this, the only registers we can access are:
527 static void sa1111_wake(struct sa1111 *sachip)
529 unsigned long flags, r;
531 spin_lock_irqsave(&sachip->lock, flags);
533 clk_enable(sachip->clk);
536 * Turn VCO on, and disable PLL Bypass.
538 r = sa1111_readl(sachip->base + SA1111_SKCR);
540 sa1111_writel(r, sachip->base + SA1111_SKCR);
541 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
542 sa1111_writel(r, sachip->base + SA1111_SKCR);
545 * Wait lock time. SA1111 manual _doesn't_
546 * specify a figure for this! We choose 100us.
551 * Enable RCLK. We also ensure that RDYEN is set.
553 r |= SKCR_RCLKEN | SKCR_RDYEN;
554 sa1111_writel(r, sachip->base + SA1111_SKCR);
557 * Wait 14 RCLK cycles for the chip to finish coming out
558 * of reset. (RCLK=24MHz). This is 590ns.
563 * Ensure all clocks are initially off.
565 sa1111_writel(0, sachip->base + SA1111_SKPCR);
567 spin_unlock_irqrestore(&sachip->lock, flags);
570 #ifdef CONFIG_ARCH_SA1100
572 static u32 sa1111_dma_mask[] = {
584 * Configure the SA1111 shared memory controller.
587 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
588 unsigned int cas_latency)
590 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
592 if (cas_latency == 3)
595 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
598 * Now clear the bits in the DMA mask to work around the SA1111
599 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
600 * Chip Specification Update, June 2000, Erratum #7).
602 if (sachip->dev->dma_mask)
603 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
605 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
609 static void sa1111_dev_release(struct device *_dev)
611 struct sa1111_dev *dev = SA1111_DEV(_dev);
617 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
618 struct sa1111_dev_info *info)
620 struct sa1111_dev *dev;
624 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
630 device_initialize(&dev->dev);
631 dev_set_name(&dev->dev, "%4.4lx", info->offset);
632 dev->devid = info->devid;
633 dev->dev.parent = sachip->dev;
634 dev->dev.bus = &sa1111_bus_type;
635 dev->dev.release = sa1111_dev_release;
636 dev->res.start = sachip->phys + info->offset;
637 dev->res.end = dev->res.start + 511;
638 dev->res.name = dev_name(&dev->dev);
639 dev->res.flags = IORESOURCE_MEM;
640 dev->mapbase = sachip->base + info->offset;
641 dev->skpcr_mask = info->skpcr_mask;
643 for (i = 0; i < ARRAY_SIZE(info->irq); i++)
644 dev->irq[i] = sachip->irq_base + info->irq[i];
647 * If the parent device has a DMA mask associated with it, and
648 * this child supports DMA, propagate it down to the children.
650 if (info->dma && sachip->dev->dma_mask) {
651 dev->dma_mask = *sachip->dev->dma_mask;
652 dev->dev.dma_mask = &dev->dma_mask;
653 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
656 ret = request_resource(parent, &dev->res);
658 dev_err(sachip->dev, "failed to allocate resource for %s\n",
663 ret = device_add(&dev->dev);
669 release_resource(&dev->res);
671 put_device(&dev->dev);
677 * sa1111_probe - probe for a single SA1111 chip.
678 * @phys_addr: physical address of device.
680 * Probe for a SA1111 chip. This must be called
681 * before any other SA1111-specific code.
684 * %-ENODEV device not found.
685 * %-EBUSY physical address already marked in-use.
686 * %-EINVAL no platform data passed
689 static int __sa1111_probe(struct device *me, struct resource *mem, int irq)
691 struct sa1111_platform_data *pd = me->platform_data;
692 struct sa1111 *sachip;
694 unsigned int has_devs;
695 int i, ret = -ENODEV;
700 sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL);
704 sachip->clk = clk_get(me, "SA1111_CLK");
705 if (IS_ERR(sachip->clk)) {
706 ret = PTR_ERR(sachip->clk);
710 ret = clk_prepare(sachip->clk);
714 spin_lock_init(&sachip->lock);
717 dev_set_drvdata(sachip->dev, sachip);
720 sachip->phys = mem->start;
724 * Map the whole region. This also maps the
725 * registers for our children.
727 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
734 * Probe for the chip. Only touch the SBI registers.
736 id = sa1111_readl(sachip->base + SA1111_SKID);
737 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
738 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
743 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
744 "silicon revision %lx, metal revision %lx\n",
745 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
748 * We found it. Wake the chip up, and initialise.
753 * The interrupt controller must be initialised before any
754 * other device to ensure that the interrupts are available.
756 if (sachip->irq != NO_IRQ) {
757 ret = sa1111_setup_irq(sachip, pd->irq_base);
762 #ifdef CONFIG_ARCH_SA1100
767 * The SDRAM configuration of the SA1110 and the SA1111 must
768 * match. This is very important to ensure that SA1111 accesses
769 * don't corrupt the SDRAM. Note that this ungates the SA1111's
770 * MBGNT signal, so we must have called sa1110_mb_disable()
773 sa1111_configure_smc(sachip, 1,
774 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
775 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
778 * We only need to turn on DCLK whenever we want to use the
779 * DMA. It can otherwise be held firmly in the off position.
780 * (currently, we always enable it.)
782 val = sa1111_readl(sachip->base + SA1111_SKPCR);
783 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
786 * Enable the SA1110 memory bus request and grant signals.
796 has_devs &= ~pd->disable_devs;
798 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
799 if (sa1111_devices[i].devid & has_devs)
800 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
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(sachip->irq, NULL);
841 irq_set_handler_data(sachip->irq, NULL);
842 irq_free_descs(sachip->irq_base, SA1111_IRQ_NR);
844 release_mem_region(sachip->phys + SA1111_INTC, 512);
847 iounmap(sachip->base);
848 clk_put(sachip->clk);
852 struct sa1111_save_data {
857 unsigned char skpwm0;
858 unsigned char skpwm1;
861 * Interrupt controller
863 unsigned int intpol0;
864 unsigned int intpol1;
867 unsigned int wakepol0;
868 unsigned int wakepol1;
869 unsigned int wakeen0;
870 unsigned int wakeen1;
875 static int sa1111_suspend(struct platform_device *dev, pm_message_t state)
877 struct sa1111 *sachip = platform_get_drvdata(dev);
878 struct sa1111_save_data *save;
883 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
886 sachip->saved_state = save;
888 spin_lock_irqsave(&sachip->lock, flags);
894 save->skcr = sa1111_readl(base + SA1111_SKCR);
895 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
896 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
897 save->skaud = sa1111_readl(base + SA1111_SKAUD);
898 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
899 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
901 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
902 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
904 base = sachip->base + SA1111_INTC;
905 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
906 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
907 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
908 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
909 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
910 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
911 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
912 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
917 val = sa1111_readl(sachip->base + SA1111_SKCR);
918 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
920 clk_disable(sachip->clk);
922 spin_unlock_irqrestore(&sachip->lock, flags);
924 #ifdef CONFIG_ARCH_SA1100
932 * sa1111_resume - Restore the SA1111 device state.
933 * @dev: device to restore
935 * Restore the general state of the SA1111; clock control and
936 * interrupt controller. Other parts of the SA1111 must be
937 * restored by their respective drivers, and must be called
938 * via LDM after this function.
940 static int sa1111_resume(struct platform_device *dev)
942 struct sa1111 *sachip = platform_get_drvdata(dev);
943 struct sa1111_save_data *save;
944 unsigned long flags, id;
947 save = sachip->saved_state;
952 * Ensure that the SA1111 is still here.
953 * FIXME: shouldn't do this here.
955 id = sa1111_readl(sachip->base + SA1111_SKID);
956 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
957 __sa1111_remove(sachip);
958 platform_set_drvdata(dev, NULL);
964 * First of all, wake up the chip.
968 #ifdef CONFIG_ARCH_SA1100
969 /* Enable the memory bus request/grant signals */
974 * Only lock for write ops. Also, sa1111_wake must be called with
977 spin_lock_irqsave(&sachip->lock, flags);
979 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
980 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
983 sa1111_writel(save->skcr, base + SA1111_SKCR);
984 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
985 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
986 sa1111_writel(save->skaud, base + SA1111_SKAUD);
987 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
988 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
990 base = sachip->base + SA1111_INTC;
991 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
992 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
993 sa1111_writel(save->inten0, base + SA1111_INTEN0);
994 sa1111_writel(save->inten1, base + SA1111_INTEN1);
995 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
996 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
997 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
998 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
1000 spin_unlock_irqrestore(&sachip->lock, flags);
1002 sachip->saved_state = NULL;
1009 #define sa1111_suspend NULL
1010 #define sa1111_resume NULL
1013 static int sa1111_probe(struct platform_device *pdev)
1015 struct resource *mem;
1018 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1021 irq = platform_get_irq(pdev, 0);
1025 return __sa1111_probe(&pdev->dev, mem, irq);
1028 static int sa1111_remove(struct platform_device *pdev)
1030 struct sa1111 *sachip = platform_get_drvdata(pdev);
1034 kfree(sachip->saved_state);
1035 sachip->saved_state = NULL;
1037 __sa1111_remove(sachip);
1038 platform_set_drvdata(pdev, NULL);
1045 * Not sure if this should be on the system bus or not yet.
1046 * We really want some way to register a system device at
1047 * the per-machine level, and then have this driver pick
1048 * up the registered devices.
1050 * We also need to handle the SDRAM configuration for
1051 * PXA250/SA1110 machine classes.
1053 static struct platform_driver sa1111_device_driver = {
1054 .probe = sa1111_probe,
1055 .remove = sa1111_remove,
1056 .suspend = sa1111_suspend,
1057 .resume = sa1111_resume,
1060 .owner = THIS_MODULE,
1065 * Get the parent device driver (us) structure
1066 * from a child function device
1068 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
1070 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
1074 * The bits in the opdiv field are non-linear.
1076 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
1078 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
1080 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1082 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
1084 fbdiv = (skcdr & 0x007f) + 2;
1085 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1086 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1088 return 3686400 * fbdiv / (ipdiv * opdiv);
1092 * sa1111_pll_clock - return the current PLL clock frequency.
1093 * @sadev: SA1111 function block
1095 * BUG: we should look at SKCR. We also blindly believe that
1096 * the chip is being fed with the 3.6864MHz clock.
1098 * Returns the PLL clock in Hz.
1100 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1102 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1104 return __sa1111_pll_clock(sachip);
1106 EXPORT_SYMBOL(sa1111_pll_clock);
1109 * sa1111_select_audio_mode - select I2S or AC link mode
1110 * @sadev: SA1111 function block
1111 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1113 * Frob the SKCR to select AC Link mode or I2S mode for
1116 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1118 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1119 unsigned long flags;
1122 spin_lock_irqsave(&sachip->lock, flags);
1124 val = sa1111_readl(sachip->base + SA1111_SKCR);
1125 if (mode == SA1111_AUDIO_I2S) {
1130 sa1111_writel(val, sachip->base + SA1111_SKCR);
1132 spin_unlock_irqrestore(&sachip->lock, flags);
1134 EXPORT_SYMBOL(sa1111_select_audio_mode);
1137 * sa1111_set_audio_rate - set the audio sample rate
1138 * @sadev: SA1111 SAC function block
1139 * @rate: sample rate to select
1141 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1143 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1146 if (sadev->devid != SA1111_DEVID_SAC)
1149 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1155 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1159 EXPORT_SYMBOL(sa1111_set_audio_rate);
1162 * sa1111_get_audio_rate - get the audio sample rate
1163 * @sadev: SA1111 SAC function block device
1165 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1167 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1170 if (sadev->devid != SA1111_DEVID_SAC)
1173 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1175 return __sa1111_pll_clock(sachip) / (256 * div);
1177 EXPORT_SYMBOL(sa1111_get_audio_rate);
1179 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1180 unsigned int bits, unsigned int dir,
1181 unsigned int sleep_dir)
1183 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1184 unsigned long flags;
1186 void __iomem *gpio = sachip->base + SA1111_GPIO;
1188 #define MODIFY_BITS(port, mask, dir) \
1190 val = sa1111_readl(port); \
1192 val |= (dir) & (mask); \
1193 sa1111_writel(val, port); \
1196 spin_lock_irqsave(&sachip->lock, flags);
1197 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1198 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1199 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1201 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1202 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1203 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1204 spin_unlock_irqrestore(&sachip->lock, flags);
1206 EXPORT_SYMBOL(sa1111_set_io_dir);
1208 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1210 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1211 unsigned long flags;
1213 void __iomem *gpio = sachip->base + SA1111_GPIO;
1215 spin_lock_irqsave(&sachip->lock, flags);
1216 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1217 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1218 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1219 spin_unlock_irqrestore(&sachip->lock, flags);
1221 EXPORT_SYMBOL(sa1111_set_io);
1223 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1225 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1226 unsigned long flags;
1228 void __iomem *gpio = sachip->base + SA1111_GPIO;
1230 spin_lock_irqsave(&sachip->lock, flags);
1231 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1232 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1233 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1234 spin_unlock_irqrestore(&sachip->lock, flags);
1236 EXPORT_SYMBOL(sa1111_set_sleep_io);
1239 * Individual device operations.
1243 * sa1111_enable_device - enable an on-chip SA1111 function block
1244 * @sadev: SA1111 function block device to enable
1246 int sa1111_enable_device(struct sa1111_dev *sadev)
1248 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1249 unsigned long flags;
1253 if (sachip->pdata && sachip->pdata->enable)
1254 ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid);
1257 spin_lock_irqsave(&sachip->lock, flags);
1258 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1259 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1260 spin_unlock_irqrestore(&sachip->lock, flags);
1264 EXPORT_SYMBOL(sa1111_enable_device);
1267 * sa1111_disable_device - disable an on-chip SA1111 function block
1268 * @sadev: SA1111 function block device to disable
1270 void sa1111_disable_device(struct sa1111_dev *sadev)
1272 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1273 unsigned long flags;
1276 spin_lock_irqsave(&sachip->lock, flags);
1277 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1278 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1279 spin_unlock_irqrestore(&sachip->lock, flags);
1281 if (sachip->pdata && sachip->pdata->disable)
1282 sachip->pdata->disable(sachip->pdata->data, sadev->devid);
1284 EXPORT_SYMBOL(sa1111_disable_device);
1287 * SA1111 "Register Access Bus."
1289 * We model this as a regular bus type, and hang devices directly
1292 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1294 struct sa1111_dev *dev = SA1111_DEV(_dev);
1295 struct sa1111_driver *drv = SA1111_DRV(_drv);
1297 return dev->devid & drv->devid;
1300 static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1302 struct sa1111_dev *sadev = SA1111_DEV(dev);
1303 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1306 if (drv && drv->suspend)
1307 ret = drv->suspend(sadev, state);
1311 static int sa1111_bus_resume(struct device *dev)
1313 struct sa1111_dev *sadev = SA1111_DEV(dev);
1314 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1317 if (drv && drv->resume)
1318 ret = drv->resume(sadev);
1322 static void sa1111_bus_shutdown(struct device *dev)
1324 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1326 if (drv && drv->shutdown)
1327 drv->shutdown(SA1111_DEV(dev));
1330 static int sa1111_bus_probe(struct device *dev)
1332 struct sa1111_dev *sadev = SA1111_DEV(dev);
1333 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1337 ret = drv->probe(sadev);
1341 static int sa1111_bus_remove(struct device *dev)
1343 struct sa1111_dev *sadev = SA1111_DEV(dev);
1344 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1348 ret = drv->remove(sadev);
1352 struct bus_type sa1111_bus_type = {
1353 .name = "sa1111-rab",
1354 .match = sa1111_match,
1355 .probe = sa1111_bus_probe,
1356 .remove = sa1111_bus_remove,
1357 .suspend = sa1111_bus_suspend,
1358 .resume = sa1111_bus_resume,
1359 .shutdown = sa1111_bus_shutdown,
1361 EXPORT_SYMBOL(sa1111_bus_type);
1363 int sa1111_driver_register(struct sa1111_driver *driver)
1365 driver->drv.bus = &sa1111_bus_type;
1366 return driver_register(&driver->drv);
1368 EXPORT_SYMBOL(sa1111_driver_register);
1370 void sa1111_driver_unregister(struct sa1111_driver *driver)
1372 driver_unregister(&driver->drv);
1374 EXPORT_SYMBOL(sa1111_driver_unregister);
1376 #ifdef CONFIG_DMABOUNCE
1378 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
1379 * Chip Specification Update" (June 2000), erratum #7, there is a
1380 * significant bug in the SA1111 SDRAM shared memory controller. If
1381 * an access to a region of memory above 1MB relative to the bank base,
1382 * it is important that address bit 10 _NOT_ be asserted. Depending
1383 * on the configuration of the RAM, bit 10 may correspond to one
1384 * of several different (processor-relative) address bits.
1386 * This routine only identifies whether or not a given DMA address
1387 * is susceptible to the bug.
1389 * This should only get called for sa1111_device types due to the
1390 * way we configure our device dma_masks.
1392 static int sa1111_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
1395 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
1396 * User's Guide" mentions that jumpers R51 and R52 control the
1397 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
1398 * SDRAM bank 1 on Neponset). The default configuration selects
1399 * Assabet, so any address in bank 1 is necessarily invalid.
1401 return (machine_is_assabet() || machine_is_pfs168()) &&
1402 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000);
1405 static int sa1111_notifier_call(struct notifier_block *n, unsigned long action,
1408 struct sa1111_dev *dev = SA1111_DEV(data);
1411 case BUS_NOTIFY_ADD_DEVICE:
1412 if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL) {
1413 int ret = dmabounce_register_dev(&dev->dev, 1024, 4096,
1414 sa1111_needs_bounce);
1416 dev_err(&dev->dev, "failed to register with dmabounce: %d\n", ret);
1420 case BUS_NOTIFY_DEL_DEVICE:
1421 if (dev->dev.dma_mask && dev->dma_mask < 0xffffffffUL)
1422 dmabounce_unregister_dev(&dev->dev);
1428 static struct notifier_block sa1111_bus_notifier = {
1429 .notifier_call = sa1111_notifier_call,
1433 static int __init sa1111_init(void)
1435 int ret = bus_register(&sa1111_bus_type);
1436 #ifdef CONFIG_DMABOUNCE
1438 bus_register_notifier(&sa1111_bus_type, &sa1111_bus_notifier);
1441 platform_driver_register(&sa1111_device_driver);
1445 static void __exit sa1111_exit(void)
1447 platform_driver_unregister(&sa1111_device_driver);
1448 #ifdef CONFIG_DMABOUNCE
1449 bus_unregister_notifier(&sa1111_bus_type, &sa1111_bus_notifier);
1451 bus_unregister(&sa1111_bus_type);
1454 subsys_initcall(sa1111_init);
1455 module_exit(sa1111_exit);
1457 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1458 MODULE_LICENSE("GPL");