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;
128 static struct sa1111_dev_info sa1111_devices[] = {
130 .offset = SA1111_USB,
131 .skpcr_mask = SKPCR_UCLKEN,
132 .devid = SA1111_DEVID_USB,
144 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
145 .devid = SA1111_DEVID_SAC,
155 .skpcr_mask = SKPCR_SCLKEN,
156 .devid = SA1111_DEVID_SSP,
159 .offset = SA1111_KBD,
160 .skpcr_mask = SKPCR_PTCLKEN,
161 .devid = SA1111_DEVID_PS2,
168 .offset = SA1111_MSE,
169 .skpcr_mask = SKPCR_PMCLKEN,
170 .devid = SA1111_DEVID_PS2,
179 .devid = SA1111_DEVID_PCMCIA,
192 * SA1111 interrupt support. Since clearing an IRQ while there are
193 * active IRQs causes the interrupt output to pulse, the upper levels
194 * will call us again if there are more interrupts to process.
197 sa1111_irq_handler(unsigned int irq, struct irq_desc *desc)
199 unsigned int stat0, stat1, i;
200 struct sa1111 *sachip = irq_get_handler_data(irq);
201 void __iomem *mapbase = sachip->base + SA1111_INTC;
203 stat0 = sa1111_readl(mapbase + SA1111_INTSTATCLR0);
204 stat1 = sa1111_readl(mapbase + SA1111_INTSTATCLR1);
206 sa1111_writel(stat0, mapbase + SA1111_INTSTATCLR0);
208 desc->irq_data.chip->irq_ack(&desc->irq_data);
210 sa1111_writel(stat1, mapbase + SA1111_INTSTATCLR1);
212 if (stat0 == 0 && stat1 == 0) {
213 do_bad_IRQ(irq, desc);
217 for (i = 0; stat0; i++, stat0 >>= 1)
219 generic_handle_irq(i + sachip->irq_base);
221 for (i = 32; stat1; i++, stat1 >>= 1)
223 generic_handle_irq(i + sachip->irq_base);
225 /* For level-based interrupts */
226 desc->irq_data.chip->irq_unmask(&desc->irq_data);
229 #define SA1111_IRQMASK_LO(x) (1 << (x - sachip->irq_base))
230 #define SA1111_IRQMASK_HI(x) (1 << (x - sachip->irq_base - 32))
232 static void sa1111_ack_irq(struct irq_data *d)
236 static void sa1111_mask_lowirq(struct irq_data *d)
238 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
239 void __iomem *mapbase = sachip->base + SA1111_INTC;
242 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
243 ie0 &= ~SA1111_IRQMASK_LO(d->irq);
244 writel(ie0, mapbase + SA1111_INTEN0);
247 static void sa1111_unmask_lowirq(struct irq_data *d)
249 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
250 void __iomem *mapbase = sachip->base + SA1111_INTC;
253 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
254 ie0 |= SA1111_IRQMASK_LO(d->irq);
255 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
259 * Attempt to re-trigger the interrupt. The SA1111 contains a register
260 * (INTSET) which claims to do this. However, in practice no amount of
261 * manipulation of INTEN and INTSET guarantees that the interrupt will
262 * be triggered. In fact, its very difficult, if not impossible to get
263 * INTSET to re-trigger the interrupt.
265 static int sa1111_retrigger_lowirq(struct irq_data *d)
267 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
268 void __iomem *mapbase = sachip->base + SA1111_INTC;
269 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
273 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
274 for (i = 0; i < 8; i++) {
275 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
276 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
277 if (sa1111_readl(mapbase + SA1111_INTSTATCLR0) & mask)
282 printk(KERN_ERR "Danger Will Robinson: failed to "
283 "re-trigger IRQ%d\n", d->irq);
284 return i == 8 ? -1 : 0;
287 static int sa1111_type_lowirq(struct irq_data *d, unsigned int flags)
289 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
290 void __iomem *mapbase = sachip->base + SA1111_INTC;
291 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
294 if (flags == IRQ_TYPE_PROBE)
297 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
300 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
301 if (flags & IRQ_TYPE_EDGE_RISING)
305 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
306 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
311 static int sa1111_wake_lowirq(struct irq_data *d, unsigned int on)
313 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
314 void __iomem *mapbase = sachip->base + SA1111_INTC;
315 unsigned int mask = SA1111_IRQMASK_LO(d->irq);
318 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
323 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
328 static struct irq_chip sa1111_low_chip = {
330 .irq_ack = sa1111_ack_irq,
331 .irq_mask = sa1111_mask_lowirq,
332 .irq_unmask = sa1111_unmask_lowirq,
333 .irq_retrigger = sa1111_retrigger_lowirq,
334 .irq_set_type = sa1111_type_lowirq,
335 .irq_set_wake = sa1111_wake_lowirq,
338 static void sa1111_mask_highirq(struct irq_data *d)
340 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
341 void __iomem *mapbase = sachip->base + SA1111_INTC;
344 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
345 ie1 &= ~SA1111_IRQMASK_HI(d->irq);
346 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
349 static void sa1111_unmask_highirq(struct irq_data *d)
351 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
352 void __iomem *mapbase = sachip->base + SA1111_INTC;
355 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
356 ie1 |= SA1111_IRQMASK_HI(d->irq);
357 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
361 * Attempt to re-trigger the interrupt. The SA1111 contains a register
362 * (INTSET) which claims to do this. However, in practice no amount of
363 * manipulation of INTEN and INTSET guarantees that the interrupt will
364 * be triggered. In fact, its very difficult, if not impossible to get
365 * INTSET to re-trigger the interrupt.
367 static int sa1111_retrigger_highirq(struct irq_data *d)
369 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
370 void __iomem *mapbase = sachip->base + SA1111_INTC;
371 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
375 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
376 for (i = 0; i < 8; i++) {
377 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
378 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
379 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
384 printk(KERN_ERR "Danger Will Robinson: failed to "
385 "re-trigger IRQ%d\n", d->irq);
386 return i == 8 ? -1 : 0;
389 static int sa1111_type_highirq(struct irq_data *d, unsigned int flags)
391 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
392 void __iomem *mapbase = sachip->base + SA1111_INTC;
393 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
396 if (flags == IRQ_TYPE_PROBE)
399 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
402 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
403 if (flags & IRQ_TYPE_EDGE_RISING)
407 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
408 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
413 static int sa1111_wake_highirq(struct irq_data *d, unsigned int on)
415 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
416 void __iomem *mapbase = sachip->base + SA1111_INTC;
417 unsigned int mask = SA1111_IRQMASK_HI(d->irq);
420 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
425 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
430 static struct irq_chip sa1111_high_chip = {
432 .irq_ack = sa1111_ack_irq,
433 .irq_mask = sa1111_mask_highirq,
434 .irq_unmask = sa1111_unmask_highirq,
435 .irq_retrigger = sa1111_retrigger_highirq,
436 .irq_set_type = sa1111_type_highirq,
437 .irq_set_wake = sa1111_wake_highirq,
440 static int sa1111_setup_irq(struct sa1111 *sachip, unsigned irq_base)
442 void __iomem *irqbase = sachip->base + SA1111_INTC;
447 * We're guaranteed that this region hasn't been taken.
449 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
451 ret = irq_alloc_descs(-1, irq_base, SA1111_IRQ_NR, -1);
453 dev_err(sachip->dev, "unable to allocate %u irqs: %d\n",
460 sachip->irq_base = ret;
462 /* disable all IRQs */
463 sa1111_writel(0, irqbase + SA1111_INTEN0);
464 sa1111_writel(0, irqbase + SA1111_INTEN1);
465 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
466 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
469 * detect on rising edge. Note: Feb 2001 Errata for SA1111
470 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
472 sa1111_writel(0, irqbase + SA1111_INTPOL0);
473 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
474 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
475 irqbase + SA1111_INTPOL1);
478 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
479 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
481 for (i = IRQ_GPAIN0; i <= SSPROR; i++) {
482 irq = sachip->irq_base + i;
483 irq_set_chip_and_handler(irq, &sa1111_low_chip,
485 irq_set_chip_data(irq, sachip);
486 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
489 for (i = AUDXMTDMADONEA; i <= IRQ_S1_BVD1_STSCHG; i++) {
490 irq = sachip->irq_base + i;
491 irq_set_chip_and_handler(irq, &sa1111_high_chip,
493 irq_set_chip_data(irq, sachip);
494 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
498 * Register SA1111 interrupt
500 irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING);
501 irq_set_handler_data(sachip->irq, sachip);
502 irq_set_chained_handler(sachip->irq, sa1111_irq_handler);
504 dev_info(sachip->dev, "Providing IRQ%u-%u\n",
505 sachip->irq_base, sachip->irq_base + SA1111_IRQ_NR - 1);
511 * Bring the SA1111 out of reset. This requires a set procedure:
512 * 1. nRESET asserted (by hardware)
513 * 2. CLK turned on from SA1110
514 * 3. nRESET deasserted
515 * 4. VCO turned on, PLL_BYPASS turned off
516 * 5. Wait lock time, then assert RCLKEn
517 * 7. PCR set to allow clocking of individual functions
519 * Until we've done this, the only registers we can access are:
524 static void sa1111_wake(struct sa1111 *sachip)
526 unsigned long flags, r;
528 spin_lock_irqsave(&sachip->lock, flags);
530 clk_enable(sachip->clk);
533 * Turn VCO on, and disable PLL Bypass.
535 r = sa1111_readl(sachip->base + SA1111_SKCR);
537 sa1111_writel(r, sachip->base + SA1111_SKCR);
538 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
539 sa1111_writel(r, sachip->base + SA1111_SKCR);
542 * Wait lock time. SA1111 manual _doesn't_
543 * specify a figure for this! We choose 100us.
548 * Enable RCLK. We also ensure that RDYEN is set.
550 r |= SKCR_RCLKEN | SKCR_RDYEN;
551 sa1111_writel(r, sachip->base + SA1111_SKCR);
554 * Wait 14 RCLK cycles for the chip to finish coming out
555 * of reset. (RCLK=24MHz). This is 590ns.
560 * Ensure all clocks are initially off.
562 sa1111_writel(0, sachip->base + SA1111_SKPCR);
564 spin_unlock_irqrestore(&sachip->lock, flags);
567 #ifdef CONFIG_ARCH_SA1100
569 static u32 sa1111_dma_mask[] = {
581 * Configure the SA1111 shared memory controller.
584 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
585 unsigned int cas_latency)
587 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
589 if (cas_latency == 3)
592 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
595 * Now clear the bits in the DMA mask to work around the SA1111
596 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
597 * Chip Specification Update, June 2000, Erratum #7).
599 if (sachip->dev->dma_mask)
600 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
602 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
606 #ifdef CONFIG_DMABOUNCE
608 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
609 * Chip Specification Update" (June 2000), erratum #7, there is a
610 * significant bug in the SA1111 SDRAM shared memory controller. If
611 * an access to a region of memory above 1MB relative to the bank base,
612 * it is important that address bit 10 _NOT_ be asserted. Depending
613 * on the configuration of the RAM, bit 10 may correspond to one
614 * of several different (processor-relative) address bits.
616 * This routine only identifies whether or not a given DMA address
617 * is susceptible to the bug.
619 * This should only get called for sa1111_device types due to the
620 * way we configure our device dma_masks.
622 static int sa1111_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
625 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
626 * User's Guide" mentions that jumpers R51 and R52 control the
627 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
628 * SDRAM bank 1 on Neponset). The default configuration selects
629 * Assabet, so any address in bank 1 is necessarily invalid.
631 return (machine_is_assabet() || machine_is_pfs168()) &&
632 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000);
636 static void sa1111_dev_release(struct device *_dev)
638 struct sa1111_dev *dev = SA1111_DEV(_dev);
640 release_resource(&dev->res);
645 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
646 struct sa1111_dev_info *info)
648 struct sa1111_dev *dev;
652 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
658 dev_set_name(&dev->dev, "%4.4lx", info->offset);
659 dev->devid = info->devid;
660 dev->dev.parent = sachip->dev;
661 dev->dev.bus = &sa1111_bus_type;
662 dev->dev.release = sa1111_dev_release;
663 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
664 dev->res.start = sachip->phys + info->offset;
665 dev->res.end = dev->res.start + 511;
666 dev->res.name = dev_name(&dev->dev);
667 dev->res.flags = IORESOURCE_MEM;
668 dev->mapbase = sachip->base + info->offset;
669 dev->skpcr_mask = info->skpcr_mask;
671 for (i = 0; i < ARRAY_SIZE(info->irq); i++)
672 dev->irq[i] = sachip->irq_base + info->irq[i];
674 ret = request_resource(parent, &dev->res);
676 printk("SA1111: failed to allocate resource for %s\n",
678 dev_set_name(&dev->dev, NULL);
684 ret = device_register(&dev->dev);
686 release_resource(&dev->res);
691 #ifdef CONFIG_DMABOUNCE
693 * If the parent device has a DMA mask associated with it,
694 * propagate it down to the children.
696 if (sachip->dev->dma_mask) {
697 dev->dma_mask = *sachip->dev->dma_mask;
698 dev->dev.dma_mask = &dev->dma_mask;
700 if (dev->dma_mask != 0xffffffffUL) {
701 ret = dmabounce_register_dev(&dev->dev, 1024, 4096,
702 sa1111_needs_bounce);
704 dev_err(&dev->dev, "SA1111: Failed to register"
705 " with dmabounce\n");
706 device_unregister(&dev->dev);
717 * sa1111_probe - probe for a single SA1111 chip.
718 * @phys_addr: physical address of device.
720 * Probe for a SA1111 chip. This must be called
721 * before any other SA1111-specific code.
724 * %-ENODEV device not found.
725 * %-EBUSY physical address already marked in-use.
726 * %-EINVAL no platform data passed
730 __sa1111_probe(struct device *me, struct resource *mem, int irq)
732 struct sa1111_platform_data *pd = me->platform_data;
733 struct sa1111 *sachip;
735 unsigned int has_devs;
736 int i, ret = -ENODEV;
741 sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL);
745 sachip->clk = clk_get(me, "SA1111_CLK");
746 if (IS_ERR(sachip->clk)) {
747 ret = PTR_ERR(sachip->clk);
751 ret = clk_prepare(sachip->clk);
755 spin_lock_init(&sachip->lock);
758 dev_set_drvdata(sachip->dev, sachip);
761 sachip->phys = mem->start;
765 * Map the whole region. This also maps the
766 * registers for our children.
768 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
775 * Probe for the chip. Only touch the SBI registers.
777 id = sa1111_readl(sachip->base + SA1111_SKID);
778 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
779 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
784 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
785 "silicon revision %lx, metal revision %lx\n",
786 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
789 * We found it. Wake the chip up, and initialise.
794 * The interrupt controller must be initialised before any
795 * other device to ensure that the interrupts are available.
797 if (sachip->irq != NO_IRQ) {
798 ret = sa1111_setup_irq(sachip, pd->irq_base);
803 #ifdef CONFIG_ARCH_SA1100
808 * The SDRAM configuration of the SA1110 and the SA1111 must
809 * match. This is very important to ensure that SA1111 accesses
810 * don't corrupt the SDRAM. Note that this ungates the SA1111's
811 * MBGNT signal, so we must have called sa1110_mb_disable()
814 sa1111_configure_smc(sachip, 1,
815 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
816 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
819 * We only need to turn on DCLK whenever we want to use the
820 * DMA. It can otherwise be held firmly in the off position.
821 * (currently, we always enable it.)
823 val = sa1111_readl(sachip->base + SA1111_SKPCR);
824 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
827 * Enable the SA1110 memory bus request and grant signals.
836 if (machine_is_assabet() || machine_is_jornada720() ||
838 has_devs &= ~(1 << 4);
840 has_devs &= ~(1 << 1);
842 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
843 if (has_devs & (1 << i))
844 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
849 iounmap(sachip->base);
851 clk_unprepare(sachip->clk);
853 clk_put(sachip->clk);
859 static int sa1111_remove_one(struct device *dev, void *data)
861 device_unregister(dev);
865 static void __sa1111_remove(struct sa1111 *sachip)
867 void __iomem *irqbase = sachip->base + SA1111_INTC;
869 device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
871 /* disable all IRQs */
872 sa1111_writel(0, irqbase + SA1111_INTEN0);
873 sa1111_writel(0, irqbase + SA1111_INTEN1);
874 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
875 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
877 clk_disable(sachip->clk);
878 clk_unprepare(sachip->clk);
880 if (sachip->irq != NO_IRQ) {
881 irq_set_chained_handler(sachip->irq, NULL);
882 irq_set_handler_data(sachip->irq, NULL);
883 irq_free_descs(sachip->irq_base, SA1111_IRQ_NR);
885 release_mem_region(sachip->phys + SA1111_INTC, 512);
888 iounmap(sachip->base);
889 clk_put(sachip->clk);
893 struct sa1111_save_data {
898 unsigned char skpwm0;
899 unsigned char skpwm1;
902 * Interrupt controller
904 unsigned int intpol0;
905 unsigned int intpol1;
908 unsigned int wakepol0;
909 unsigned int wakepol1;
910 unsigned int wakeen0;
911 unsigned int wakeen1;
916 static int sa1111_suspend(struct platform_device *dev, pm_message_t state)
918 struct sa1111 *sachip = platform_get_drvdata(dev);
919 struct sa1111_save_data *save;
924 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
927 sachip->saved_state = save;
929 spin_lock_irqsave(&sachip->lock, flags);
935 save->skcr = sa1111_readl(base + SA1111_SKCR);
936 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
937 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
938 save->skaud = sa1111_readl(base + SA1111_SKAUD);
939 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
940 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
942 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
943 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
945 base = sachip->base + SA1111_INTC;
946 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
947 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
948 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
949 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
950 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
951 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
952 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
953 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
958 val = sa1111_readl(sachip->base + SA1111_SKCR);
959 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
961 clk_disable(sachip->clk);
963 spin_unlock_irqrestore(&sachip->lock, flags);
965 #ifdef CONFIG_ARCH_SA1100
973 * sa1111_resume - Restore the SA1111 device state.
974 * @dev: device to restore
976 * Restore the general state of the SA1111; clock control and
977 * interrupt controller. Other parts of the SA1111 must be
978 * restored by their respective drivers, and must be called
979 * via LDM after this function.
981 static int sa1111_resume(struct platform_device *dev)
983 struct sa1111 *sachip = platform_get_drvdata(dev);
984 struct sa1111_save_data *save;
985 unsigned long flags, id;
988 save = sachip->saved_state;
993 * Ensure that the SA1111 is still here.
994 * FIXME: shouldn't do this here.
996 id = sa1111_readl(sachip->base + SA1111_SKID);
997 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
998 __sa1111_remove(sachip);
999 platform_set_drvdata(dev, NULL);
1005 * First of all, wake up the chip.
1007 sa1111_wake(sachip);
1009 #ifdef CONFIG_ARCH_SA1100
1010 /* Enable the memory bus request/grant signals */
1015 * Only lock for write ops. Also, sa1111_wake must be called with
1016 * released spinlock!
1018 spin_lock_irqsave(&sachip->lock, flags);
1020 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
1021 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
1023 base = sachip->base;
1024 sa1111_writel(save->skcr, base + SA1111_SKCR);
1025 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
1026 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
1027 sa1111_writel(save->skaud, base + SA1111_SKAUD);
1028 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
1029 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
1031 base = sachip->base + SA1111_INTC;
1032 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
1033 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
1034 sa1111_writel(save->inten0, base + SA1111_INTEN0);
1035 sa1111_writel(save->inten1, base + SA1111_INTEN1);
1036 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
1037 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
1038 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
1039 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
1041 spin_unlock_irqrestore(&sachip->lock, flags);
1043 sachip->saved_state = NULL;
1050 #define sa1111_suspend NULL
1051 #define sa1111_resume NULL
1054 static int __devinit sa1111_probe(struct platform_device *pdev)
1056 struct resource *mem;
1059 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1062 irq = platform_get_irq(pdev, 0);
1066 return __sa1111_probe(&pdev->dev, mem, irq);
1069 static int sa1111_remove(struct platform_device *pdev)
1071 struct sa1111 *sachip = platform_get_drvdata(pdev);
1075 kfree(sachip->saved_state);
1076 sachip->saved_state = NULL;
1078 __sa1111_remove(sachip);
1079 platform_set_drvdata(pdev, NULL);
1086 * Not sure if this should be on the system bus or not yet.
1087 * We really want some way to register a system device at
1088 * the per-machine level, and then have this driver pick
1089 * up the registered devices.
1091 * We also need to handle the SDRAM configuration for
1092 * PXA250/SA1110 machine classes.
1094 static struct platform_driver sa1111_device_driver = {
1095 .probe = sa1111_probe,
1096 .remove = sa1111_remove,
1097 .suspend = sa1111_suspend,
1098 .resume = sa1111_resume,
1101 .owner = THIS_MODULE,
1106 * Get the parent device driver (us) structure
1107 * from a child function device
1109 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
1111 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
1115 * The bits in the opdiv field are non-linear.
1117 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
1119 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
1121 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1123 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
1125 fbdiv = (skcdr & 0x007f) + 2;
1126 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1127 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1129 return 3686400 * fbdiv / (ipdiv * opdiv);
1133 * sa1111_pll_clock - return the current PLL clock frequency.
1134 * @sadev: SA1111 function block
1136 * BUG: we should look at SKCR. We also blindly believe that
1137 * the chip is being fed with the 3.6864MHz clock.
1139 * Returns the PLL clock in Hz.
1141 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1143 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1145 return __sa1111_pll_clock(sachip);
1147 EXPORT_SYMBOL(sa1111_pll_clock);
1150 * sa1111_select_audio_mode - select I2S or AC link mode
1151 * @sadev: SA1111 function block
1152 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1154 * Frob the SKCR to select AC Link mode or I2S mode for
1157 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1159 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1160 unsigned long flags;
1163 spin_lock_irqsave(&sachip->lock, flags);
1165 val = sa1111_readl(sachip->base + SA1111_SKCR);
1166 if (mode == SA1111_AUDIO_I2S) {
1171 sa1111_writel(val, sachip->base + SA1111_SKCR);
1173 spin_unlock_irqrestore(&sachip->lock, flags);
1175 EXPORT_SYMBOL(sa1111_select_audio_mode);
1178 * sa1111_set_audio_rate - set the audio sample rate
1179 * @sadev: SA1111 SAC function block
1180 * @rate: sample rate to select
1182 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1184 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1187 if (sadev->devid != SA1111_DEVID_SAC)
1190 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1196 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1200 EXPORT_SYMBOL(sa1111_set_audio_rate);
1203 * sa1111_get_audio_rate - get the audio sample rate
1204 * @sadev: SA1111 SAC function block device
1206 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1208 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1211 if (sadev->devid != SA1111_DEVID_SAC)
1214 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1216 return __sa1111_pll_clock(sachip) / (256 * div);
1218 EXPORT_SYMBOL(sa1111_get_audio_rate);
1220 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1221 unsigned int bits, unsigned int dir,
1222 unsigned int sleep_dir)
1224 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1225 unsigned long flags;
1227 void __iomem *gpio = sachip->base + SA1111_GPIO;
1229 #define MODIFY_BITS(port, mask, dir) \
1231 val = sa1111_readl(port); \
1233 val |= (dir) & (mask); \
1234 sa1111_writel(val, port); \
1237 spin_lock_irqsave(&sachip->lock, flags);
1238 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1239 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1240 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1242 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1243 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1244 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1245 spin_unlock_irqrestore(&sachip->lock, flags);
1247 EXPORT_SYMBOL(sa1111_set_io_dir);
1249 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1251 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1252 unsigned long flags;
1254 void __iomem *gpio = sachip->base + SA1111_GPIO;
1256 spin_lock_irqsave(&sachip->lock, flags);
1257 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1258 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1259 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1260 spin_unlock_irqrestore(&sachip->lock, flags);
1262 EXPORT_SYMBOL(sa1111_set_io);
1264 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1266 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1267 unsigned long flags;
1269 void __iomem *gpio = sachip->base + SA1111_GPIO;
1271 spin_lock_irqsave(&sachip->lock, flags);
1272 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1273 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1274 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1275 spin_unlock_irqrestore(&sachip->lock, flags);
1277 EXPORT_SYMBOL(sa1111_set_sleep_io);
1280 * Individual device operations.
1284 * sa1111_enable_device - enable an on-chip SA1111 function block
1285 * @sadev: SA1111 function block device to enable
1287 int sa1111_enable_device(struct sa1111_dev *sadev)
1289 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1290 unsigned long flags;
1294 if (sachip->pdata && sachip->pdata->enable)
1295 ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid);
1298 spin_lock_irqsave(&sachip->lock, flags);
1299 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1300 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1301 spin_unlock_irqrestore(&sachip->lock, flags);
1305 EXPORT_SYMBOL(sa1111_enable_device);
1308 * sa1111_disable_device - disable an on-chip SA1111 function block
1309 * @sadev: SA1111 function block device to disable
1311 void sa1111_disable_device(struct sa1111_dev *sadev)
1313 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1314 unsigned long flags;
1317 spin_lock_irqsave(&sachip->lock, flags);
1318 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1319 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1320 spin_unlock_irqrestore(&sachip->lock, flags);
1322 if (sachip->pdata && sachip->pdata->disable)
1323 sachip->pdata->disable(sachip->pdata->data, sadev->devid);
1325 EXPORT_SYMBOL(sa1111_disable_device);
1328 * SA1111 "Register Access Bus."
1330 * We model this as a regular bus type, and hang devices directly
1333 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1335 struct sa1111_dev *dev = SA1111_DEV(_dev);
1336 struct sa1111_driver *drv = SA1111_DRV(_drv);
1338 return dev->devid == drv->devid;
1341 static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1343 struct sa1111_dev *sadev = SA1111_DEV(dev);
1344 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1347 if (drv && drv->suspend)
1348 ret = drv->suspend(sadev, state);
1352 static int sa1111_bus_resume(struct device *dev)
1354 struct sa1111_dev *sadev = SA1111_DEV(dev);
1355 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1358 if (drv && drv->resume)
1359 ret = drv->resume(sadev);
1363 static void sa1111_bus_shutdown(struct device *dev)
1365 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1367 if (drv && drv->shutdown)
1368 drv->shutdown(SA1111_DEV(dev));
1371 static int sa1111_bus_probe(struct device *dev)
1373 struct sa1111_dev *sadev = SA1111_DEV(dev);
1374 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1378 ret = drv->probe(sadev);
1382 static int sa1111_bus_remove(struct device *dev)
1384 struct sa1111_dev *sadev = SA1111_DEV(dev);
1385 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1389 ret = drv->remove(sadev);
1393 struct bus_type sa1111_bus_type = {
1394 .name = "sa1111-rab",
1395 .match = sa1111_match,
1396 .probe = sa1111_bus_probe,
1397 .remove = sa1111_bus_remove,
1398 .suspend = sa1111_bus_suspend,
1399 .resume = sa1111_bus_resume,
1400 .shutdown = sa1111_bus_shutdown,
1402 EXPORT_SYMBOL(sa1111_bus_type);
1404 int sa1111_driver_register(struct sa1111_driver *driver)
1406 driver->drv.bus = &sa1111_bus_type;
1407 return driver_register(&driver->drv);
1409 EXPORT_SYMBOL(sa1111_driver_register);
1411 void sa1111_driver_unregister(struct sa1111_driver *driver)
1413 driver_unregister(&driver->drv);
1415 EXPORT_SYMBOL(sa1111_driver_unregister);
1417 static int __init sa1111_init(void)
1419 int ret = bus_register(&sa1111_bus_type);
1421 platform_driver_register(&sa1111_device_driver);
1425 static void __exit sa1111_exit(void)
1427 platform_driver_unregister(&sa1111_device_driver);
1428 bus_unregister(&sa1111_bus_type);
1431 subsys_initcall(sa1111_init);
1432 module_exit(sa1111_exit);
1434 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1435 MODULE_LICENSE("GPL");