2 * linux/arch/arm/mach-sa1100/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/config.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/delay.h>
22 #include <linux/ptrace.h>
23 #include <linux/errno.h>
24 #include <linux/ioport.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/spinlock.h>
28 #include <linux/dma-mapping.h>
30 #include <asm/hardware.h>
31 #include <asm/mach-types.h>
34 #include <asm/mach/irq.h>
35 #include <asm/sizes.h>
37 #include <asm/hardware/sa1111.h>
39 #ifdef CONFIG_ARCH_PXA
40 #include <asm/arch/pxa-regs.h>
43 extern void __init sa1110_mb_enable(void);
46 * We keep the following data for the overall SA1111. Note that the
47 * struct device and struct resource are "fake"; they should be supplied
48 * by the bus above us. However, in the interests of getting all SA1111
49 * drivers converted over to the device model, we provide this as an
50 * anchor point for all the other drivers.
61 * We _really_ need to eliminate this. Its only users
62 * are the PWM and DMA checking code.
64 static struct sa1111 *g_sa1111;
66 struct sa1111_dev_info {
68 unsigned long skpcr_mask;
73 static struct sa1111_dev_info sa1111_devices[] = {
76 .skpcr_mask = SKPCR_UCLKEN,
77 .devid = SA1111_DEVID_USB,
89 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
90 .devid = SA1111_DEVID_SAC,
100 .skpcr_mask = SKPCR_SCLKEN,
101 .devid = SA1111_DEVID_SSP,
104 .offset = SA1111_KBD,
105 .skpcr_mask = SKPCR_PTCLKEN,
106 .devid = SA1111_DEVID_PS2,
113 .offset = SA1111_MSE,
114 .skpcr_mask = SKPCR_PMCLKEN,
115 .devid = SA1111_DEVID_PS2,
124 .devid = SA1111_DEVID_PCMCIA,
136 void __init sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes)
138 unsigned int sz = SZ_1M >> PAGE_SHIFT;
143 size[1] = size[0] - sz;
148 * SA1111 interrupt support. Since clearing an IRQ while there are
149 * active IRQs causes the interrupt output to pulse, the upper levels
150 * will call us again if there are more interrupts to process.
153 sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
155 unsigned int stat0, stat1, i;
156 void __iomem *base = desc->data;
158 stat0 = sa1111_readl(base + SA1111_INTSTATCLR0);
159 stat1 = sa1111_readl(base + SA1111_INTSTATCLR1);
161 sa1111_writel(stat0, base + SA1111_INTSTATCLR0);
163 desc->chip->ack(irq);
165 sa1111_writel(stat1, base + SA1111_INTSTATCLR1);
167 if (stat0 == 0 && stat1 == 0) {
168 do_bad_IRQ(irq, desc, regs);
172 for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
174 do_edge_IRQ(i, irq_desc + i, regs);
176 for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
178 do_edge_IRQ(i, irq_desc + i, regs);
180 /* For level-based interrupts */
181 desc->chip->unmask(irq);
184 #define SA1111_IRQMASK_LO(x) (1 << (x - IRQ_SA1111_START))
185 #define SA1111_IRQMASK_HI(x) (1 << (x - IRQ_SA1111_START - 32))
187 static void sa1111_ack_irq(unsigned int irq)
191 static void sa1111_mask_lowirq(unsigned int irq)
193 void __iomem *mapbase = get_irq_chipdata(irq);
196 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
197 ie0 &= ~SA1111_IRQMASK_LO(irq);
198 writel(ie0, mapbase + SA1111_INTEN0);
201 static void sa1111_unmask_lowirq(unsigned int irq)
203 void __iomem *mapbase = get_irq_chipdata(irq);
206 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
207 ie0 |= SA1111_IRQMASK_LO(irq);
208 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
212 * Attempt to re-trigger the interrupt. The SA1111 contains a register
213 * (INTSET) which claims to do this. However, in practice no amount of
214 * manipulation of INTEN and INTSET guarantees that the interrupt will
215 * be triggered. In fact, its very difficult, if not impossible to get
216 * INTSET to re-trigger the interrupt.
218 static int sa1111_retrigger_lowirq(unsigned int irq)
220 unsigned int mask = SA1111_IRQMASK_LO(irq);
221 void __iomem *mapbase = get_irq_chipdata(irq);
225 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
226 for (i = 0; i < 8; i++) {
227 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
228 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
229 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
234 printk(KERN_ERR "Danger Will Robinson: failed to "
235 "re-trigger IRQ%d\n", irq);
236 return i == 8 ? -1 : 0;
239 static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
241 unsigned int mask = SA1111_IRQMASK_LO(irq);
242 void __iomem *mapbase = get_irq_chipdata(irq);
245 if (flags == IRQT_PROBE)
248 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
251 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
252 if (flags & __IRQT_RISEDGE)
256 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
257 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
262 static int sa1111_wake_lowirq(unsigned int irq, unsigned int on)
264 unsigned int mask = SA1111_IRQMASK_LO(irq);
265 void __iomem *mapbase = get_irq_chipdata(irq);
268 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
273 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
278 static struct irqchip sa1111_low_chip = {
279 .ack = sa1111_ack_irq,
280 .mask = sa1111_mask_lowirq,
281 .unmask = sa1111_unmask_lowirq,
282 .retrigger = sa1111_retrigger_lowirq,
283 .set_type = sa1111_type_lowirq,
284 .set_wake = sa1111_wake_lowirq,
287 static void sa1111_mask_highirq(unsigned int irq)
289 void __iomem *mapbase = get_irq_chipdata(irq);
292 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
293 ie1 &= ~SA1111_IRQMASK_HI(irq);
294 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
297 static void sa1111_unmask_highirq(unsigned int irq)
299 void __iomem *mapbase = get_irq_chipdata(irq);
302 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
303 ie1 |= SA1111_IRQMASK_HI(irq);
304 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
308 * Attempt to re-trigger the interrupt. The SA1111 contains a register
309 * (INTSET) which claims to do this. However, in practice no amount of
310 * manipulation of INTEN and INTSET guarantees that the interrupt will
311 * be triggered. In fact, its very difficult, if not impossible to get
312 * INTSET to re-trigger the interrupt.
314 static int sa1111_retrigger_highirq(unsigned int irq)
316 unsigned int mask = SA1111_IRQMASK_HI(irq);
317 void __iomem *mapbase = get_irq_chipdata(irq);
321 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
322 for (i = 0; i < 8; i++) {
323 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
324 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
325 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
330 printk(KERN_ERR "Danger Will Robinson: failed to "
331 "re-trigger IRQ%d\n", irq);
332 return i == 8 ? -1 : 0;
335 static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
337 unsigned int mask = SA1111_IRQMASK_HI(irq);
338 void __iomem *mapbase = get_irq_chipdata(irq);
341 if (flags == IRQT_PROBE)
344 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
347 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
348 if (flags & __IRQT_RISEDGE)
352 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
353 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
358 static int sa1111_wake_highirq(unsigned int irq, unsigned int on)
360 unsigned int mask = SA1111_IRQMASK_HI(irq);
361 void __iomem *mapbase = get_irq_chipdata(irq);
364 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
369 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
374 static struct irqchip sa1111_high_chip = {
375 .ack = sa1111_ack_irq,
376 .mask = sa1111_mask_highirq,
377 .unmask = sa1111_unmask_highirq,
378 .retrigger = sa1111_retrigger_highirq,
379 .set_type = sa1111_type_highirq,
380 .set_wake = sa1111_wake_highirq,
383 static void sa1111_setup_irq(struct sa1111 *sachip)
385 void __iomem *irqbase = sachip->base + SA1111_INTC;
389 * We're guaranteed that this region hasn't been taken.
391 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
393 /* disable all IRQs */
394 sa1111_writel(0, irqbase + SA1111_INTEN0);
395 sa1111_writel(0, irqbase + SA1111_INTEN1);
396 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
397 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
400 * detect on rising edge. Note: Feb 2001 Errata for SA1111
401 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
403 sa1111_writel(0, irqbase + SA1111_INTPOL0);
404 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
405 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
406 irqbase + SA1111_INTPOL1);
409 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
410 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
412 for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) {
413 set_irq_chip(irq, &sa1111_low_chip);
414 set_irq_chipdata(irq, irqbase);
415 set_irq_handler(irq, do_edge_IRQ);
416 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
419 for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) {
420 set_irq_chip(irq, &sa1111_high_chip);
421 set_irq_chipdata(irq, irqbase);
422 set_irq_handler(irq, do_edge_IRQ);
423 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
427 * Register SA1111 interrupt
429 set_irq_type(sachip->irq, IRQT_RISING);
430 set_irq_data(sachip->irq, irqbase);
431 set_irq_chained_handler(sachip->irq, sa1111_irq_handler);
435 * Bring the SA1111 out of reset. This requires a set procedure:
436 * 1. nRESET asserted (by hardware)
437 * 2. CLK turned on from SA1110
438 * 3. nRESET deasserted
439 * 4. VCO turned on, PLL_BYPASS turned off
440 * 5. Wait lock time, then assert RCLKEn
441 * 7. PCR set to allow clocking of individual functions
443 * Until we've done this, the only registers we can access are:
448 static void sa1111_wake(struct sa1111 *sachip)
450 unsigned long flags, r;
452 spin_lock_irqsave(&sachip->lock, flags);
454 #ifdef CONFIG_ARCH_SA1100
456 * First, set up the 3.6864MHz clock on GPIO 27 for the SA-1111:
457 * (SA-1110 Developer's Manual, section 9.1.2.1)
459 GAFR |= GPIO_32_768kHz;
460 GPDR |= GPIO_32_768kHz;
461 TUCR = TUCR_3_6864MHz;
462 #elif CONFIG_ARCH_PXA
463 pxa_gpio_mode(GPIO11_3_6MHz_MD);
465 #error missing clock setup
469 * Turn VCO on, and disable PLL Bypass.
471 r = sa1111_readl(sachip->base + SA1111_SKCR);
473 sa1111_writel(r, sachip->base + SA1111_SKCR);
474 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
475 sa1111_writel(r, sachip->base + SA1111_SKCR);
478 * Wait lock time. SA1111 manual _doesn't_
479 * specify a figure for this! We choose 100us.
484 * Enable RCLK. We also ensure that RDYEN is set.
486 r |= SKCR_RCLKEN | SKCR_RDYEN;
487 sa1111_writel(r, sachip->base + SA1111_SKCR);
490 * Wait 14 RCLK cycles for the chip to finish coming out
491 * of reset. (RCLK=24MHz). This is 590ns.
496 * Ensure all clocks are initially off.
498 sa1111_writel(0, sachip->base + SA1111_SKPCR);
500 spin_unlock_irqrestore(&sachip->lock, flags);
503 #ifdef CONFIG_ARCH_SA1100
505 static u32 sa1111_dma_mask[] = {
517 * Configure the SA1111 shared memory controller.
520 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
521 unsigned int cas_latency)
523 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
525 if (cas_latency == 3)
528 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
531 * Now clear the bits in the DMA mask to work around the SA1111
532 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
533 * Chip Specification Update, June 2000, Erratum #7).
535 if (sachip->dev->dma_mask)
536 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
538 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
543 static void sa1111_dev_release(struct device *_dev)
545 struct sa1111_dev *dev = SA1111_DEV(_dev);
547 release_resource(&dev->res);
552 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
553 struct sa1111_dev_info *info)
555 struct sa1111_dev *dev;
558 dev = kmalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
563 memset(dev, 0, sizeof(struct sa1111_dev));
565 snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
566 "%4.4lx", info->offset);
568 dev->devid = info->devid;
569 dev->dev.parent = sachip->dev;
570 dev->dev.bus = &sa1111_bus_type;
571 dev->dev.release = sa1111_dev_release;
572 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
573 dev->res.start = sachip->phys + info->offset;
574 dev->res.end = dev->res.start + 511;
575 dev->res.name = dev->dev.bus_id;
576 dev->res.flags = IORESOURCE_MEM;
577 dev->mapbase = sachip->base + info->offset;
578 dev->skpcr_mask = info->skpcr_mask;
579 memmove(dev->irq, info->irq, sizeof(dev->irq));
581 ret = request_resource(parent, &dev->res);
583 printk("SA1111: failed to allocate resource for %s\n",
590 ret = device_register(&dev->dev);
592 release_resource(&dev->res);
598 * If the parent device has a DMA mask associated with it,
599 * propagate it down to the children.
601 if (sachip->dev->dma_mask) {
602 dev->dma_mask = *sachip->dev->dma_mask;
603 dev->dev.dma_mask = &dev->dma_mask;
605 if (dev->dma_mask != 0xffffffffUL) {
606 ret = dmabounce_register_dev(&dev->dev, 1024, 4096);
608 printk("SA1111: Failed to register %s with dmabounce", dev->dev.bus_id);
609 device_unregister(&dev->dev);
619 * sa1111_probe - probe for a single SA1111 chip.
620 * @phys_addr: physical address of device.
622 * Probe for a SA1111 chip. This must be called
623 * before any other SA1111-specific code.
626 * %-ENODEV device not found.
627 * %-EBUSY physical address already marked in-use.
631 __sa1111_probe(struct device *me, struct resource *mem, int irq)
633 struct sa1111 *sachip;
635 unsigned int has_devs, val;
636 int i, ret = -ENODEV;
638 sachip = kmalloc(sizeof(struct sa1111), GFP_KERNEL);
642 memset(sachip, 0, sizeof(struct sa1111));
644 spin_lock_init(&sachip->lock);
647 dev_set_drvdata(sachip->dev, sachip);
649 sachip->phys = mem->start;
653 * Map the whole region. This also maps the
654 * registers for our children.
656 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
663 * Probe for the chip. Only touch the SBI registers.
665 id = sa1111_readl(sachip->base + SA1111_SKID);
666 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
667 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
672 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
673 "silicon revision %lx, metal revision %lx\n",
674 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
677 * We found it. Wake the chip up, and initialise.
681 #ifdef CONFIG_ARCH_SA1100
683 * The SDRAM configuration of the SA1110 and the SA1111 must
684 * match. This is very important to ensure that SA1111 accesses
685 * don't corrupt the SDRAM. Note that this ungates the SA1111's
686 * MBGNT signal, so we must have called sa1110_mb_disable()
689 sa1111_configure_smc(sachip, 1,
690 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
691 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
694 * We only need to turn on DCLK whenever we want to use the
695 * DMA. It can otherwise be held firmly in the off position.
696 * (currently, we always enable it.)
698 val = sa1111_readl(sachip->base + SA1111_SKPCR);
699 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
702 * Enable the SA1110 memory bus request and grant signals.
708 * The interrupt controller must be initialised before any
709 * other device to ensure that the interrupts are available.
711 if (sachip->irq != NO_IRQ)
712 sa1111_setup_irq(sachip);
717 if (machine_is_assabet() || machine_is_jornada720() ||
719 has_devs &= ~(1 << 4);
721 has_devs &= ~(1 << 1);
723 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
724 if (has_devs & (1 << i))
725 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
730 iounmap(sachip->base);
736 static int sa1111_remove_one(struct device *dev, void *data)
738 device_unregister(dev);
742 static void __sa1111_remove(struct sa1111 *sachip)
744 void __iomem *irqbase = sachip->base + SA1111_INTC;
746 device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
748 /* disable all IRQs */
749 sa1111_writel(0, irqbase + SA1111_INTEN0);
750 sa1111_writel(0, irqbase + SA1111_INTEN1);
751 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
752 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
754 if (sachip->irq != NO_IRQ) {
755 set_irq_chained_handler(sachip->irq, NULL);
756 set_irq_data(sachip->irq, NULL);
758 release_mem_region(sachip->phys + SA1111_INTC, 512);
761 iounmap(sachip->base);
766 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
767 * Chip Specification Update" (June 2000), erratum #7, there is a
768 * significant bug in the SA1111 SDRAM shared memory controller. If
769 * an access to a region of memory above 1MB relative to the bank base,
770 * it is important that address bit 10 _NOT_ be asserted. Depending
771 * on the configuration of the RAM, bit 10 may correspond to one
772 * of several different (processor-relative) address bits.
774 * This routine only identifies whether or not a given DMA address
775 * is susceptible to the bug.
777 * This should only get called for sa1111_device types due to the
778 * way we configure our device dma_masks.
780 int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
783 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
784 * User's Guide" mentions that jumpers R51 and R52 control the
785 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
786 * SDRAM bank 1 on Neponset). The default configuration selects
787 * Assabet, so any address in bank 1 is necessarily invalid.
789 return ((machine_is_assabet() || machine_is_pfs168()) &&
790 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000));
793 struct sa1111_save_data {
798 unsigned char skpwm0;
799 unsigned char skpwm1;
802 * Interrupt controller
804 unsigned int intpol0;
805 unsigned int intpol1;
808 unsigned int wakepol0;
809 unsigned int wakepol1;
810 unsigned int wakeen0;
811 unsigned int wakeen1;
816 static int sa1111_suspend(struct platform_device *dev, pm_message_t state)
818 struct sa1111 *sachip = platform_get_drvdata(dev);
819 struct sa1111_save_data *save;
824 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
827 dev->dev.power.saved_state = save;
829 spin_lock_irqsave(&sachip->lock, flags);
835 save->skcr = sa1111_readl(base + SA1111_SKCR);
836 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
837 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
838 save->skaud = sa1111_readl(base + SA1111_SKAUD);
839 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
840 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
842 base = sachip->base + SA1111_INTC;
843 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
844 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
845 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
846 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
847 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
848 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
849 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
850 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
855 val = sa1111_readl(sachip->base + SA1111_SKCR);
856 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
857 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
858 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
860 spin_unlock_irqrestore(&sachip->lock, flags);
866 * sa1111_resume - Restore the SA1111 device state.
867 * @dev: device to restore
869 * Restore the general state of the SA1111; clock control and
870 * interrupt controller. Other parts of the SA1111 must be
871 * restored by their respective drivers, and must be called
872 * via LDM after this function.
874 static int sa1111_resume(struct platform_device *dev)
876 struct sa1111 *sachip = platform_get_drvdata(dev);
877 struct sa1111_save_data *save;
878 unsigned long flags, id;
881 save = (struct sa1111_save_data *)dev->dev.power.saved_state;
885 spin_lock_irqsave(&sachip->lock, flags);
888 * Ensure that the SA1111 is still here.
889 * FIXME: shouldn't do this here.
891 id = sa1111_readl(sachip->base + SA1111_SKID);
892 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
893 __sa1111_remove(sachip);
894 platform_set_drvdata(dev, NULL);
900 * First of all, wake up the chip.
903 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
904 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
907 sa1111_writel(save->skcr, base + SA1111_SKCR);
908 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
909 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
910 sa1111_writel(save->skaud, base + SA1111_SKAUD);
911 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
912 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
914 base = sachip->base + SA1111_INTC;
915 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
916 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
917 sa1111_writel(save->inten0, base + SA1111_INTEN0);
918 sa1111_writel(save->inten1, base + SA1111_INTEN1);
919 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
920 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
921 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
922 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
924 spin_unlock_irqrestore(&sachip->lock, flags);
926 dev->dev.power.saved_state = NULL;
933 #define sa1111_suspend NULL
934 #define sa1111_resume NULL
937 static int sa1111_probe(struct platform_device *pdev)
939 struct resource *mem;
942 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
945 irq = platform_get_irq(pdev, 0);
947 return __sa1111_probe(&pdev->dev, mem, irq);
950 static int sa1111_remove(struct platform_device *pdev)
952 struct sa1111 *sachip = platform_get_drvdata(pdev);
955 __sa1111_remove(sachip);
956 platform_set_drvdata(pdev, NULL);
959 kfree(pdev->dev.power.saved_state);
960 pdev->dev.power.saved_state = NULL;
968 * Not sure if this should be on the system bus or not yet.
969 * We really want some way to register a system device at
970 * the per-machine level, and then have this driver pick
971 * up the registered devices.
973 * We also need to handle the SDRAM configuration for
974 * PXA250/SA1110 machine classes.
976 static struct platform_driver sa1111_device_driver = {
977 .probe = sa1111_probe,
978 .remove = sa1111_remove,
979 .suspend = sa1111_suspend,
980 .resume = sa1111_resume,
987 * Get the parent device driver (us) structure
988 * from a child function device
990 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
992 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
996 * The bits in the opdiv field are non-linear.
998 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
1000 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
1002 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1004 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
1006 fbdiv = (skcdr & 0x007f) + 2;
1007 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1008 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1010 return 3686400 * fbdiv / (ipdiv * opdiv);
1014 * sa1111_pll_clock - return the current PLL clock frequency.
1015 * @sadev: SA1111 function block
1017 * BUG: we should look at SKCR. We also blindly believe that
1018 * the chip is being fed with the 3.6864MHz clock.
1020 * Returns the PLL clock in Hz.
1022 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1024 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1026 return __sa1111_pll_clock(sachip);
1030 * sa1111_select_audio_mode - select I2S or AC link mode
1031 * @sadev: SA1111 function block
1032 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1034 * Frob the SKCR to select AC Link mode or I2S mode for
1037 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1039 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1040 unsigned long flags;
1043 spin_lock_irqsave(&sachip->lock, flags);
1045 val = sa1111_readl(sachip->base + SA1111_SKCR);
1046 if (mode == SA1111_AUDIO_I2S) {
1051 sa1111_writel(val, sachip->base + SA1111_SKCR);
1053 spin_unlock_irqrestore(&sachip->lock, flags);
1057 * sa1111_set_audio_rate - set the audio sample rate
1058 * @sadev: SA1111 SAC function block
1059 * @rate: sample rate to select
1061 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1063 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1066 if (sadev->devid != SA1111_DEVID_SAC)
1069 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1075 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1081 * sa1111_get_audio_rate - get the audio sample rate
1082 * @sadev: SA1111 SAC function block device
1084 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1086 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1089 if (sadev->devid != SA1111_DEVID_SAC)
1092 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1094 return __sa1111_pll_clock(sachip) / (256 * div);
1097 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1098 unsigned int bits, unsigned int dir,
1099 unsigned int sleep_dir)
1101 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1102 unsigned long flags;
1104 void __iomem *gpio = sachip->base + SA1111_GPIO;
1106 #define MODIFY_BITS(port, mask, dir) \
1108 val = sa1111_readl(port); \
1110 val |= (dir) & (mask); \
1111 sa1111_writel(val, port); \
1114 spin_lock_irqsave(&sachip->lock, flags);
1115 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1116 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1117 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1119 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1120 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1121 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1122 spin_unlock_irqrestore(&sachip->lock, flags);
1125 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1127 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1128 unsigned long flags;
1130 void __iomem *gpio = sachip->base + SA1111_GPIO;
1132 spin_lock_irqsave(&sachip->lock, flags);
1133 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1134 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1135 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1136 spin_unlock_irqrestore(&sachip->lock, flags);
1139 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1141 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1142 unsigned long flags;
1144 void __iomem *gpio = sachip->base + SA1111_GPIO;
1146 spin_lock_irqsave(&sachip->lock, flags);
1147 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1148 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1149 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1150 spin_unlock_irqrestore(&sachip->lock, flags);
1154 * Individual device operations.
1158 * sa1111_enable_device - enable an on-chip SA1111 function block
1159 * @sadev: SA1111 function block device to enable
1161 void sa1111_enable_device(struct sa1111_dev *sadev)
1163 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1164 unsigned long flags;
1167 spin_lock_irqsave(&sachip->lock, flags);
1168 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1169 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1170 spin_unlock_irqrestore(&sachip->lock, flags);
1174 * sa1111_disable_device - disable an on-chip SA1111 function block
1175 * @sadev: SA1111 function block device to disable
1177 void sa1111_disable_device(struct sa1111_dev *sadev)
1179 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1180 unsigned long flags;
1183 spin_lock_irqsave(&sachip->lock, flags);
1184 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1185 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1186 spin_unlock_irqrestore(&sachip->lock, flags);
1190 * SA1111 "Register Access Bus."
1192 * We model this as a regular bus type, and hang devices directly
1195 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1197 struct sa1111_dev *dev = SA1111_DEV(_dev);
1198 struct sa1111_driver *drv = SA1111_DRV(_drv);
1200 return dev->devid == drv->devid;
1203 static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1205 struct sa1111_dev *sadev = SA1111_DEV(dev);
1206 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1209 if (drv && drv->suspend)
1210 ret = drv->suspend(sadev, state);
1214 static int sa1111_bus_resume(struct device *dev)
1216 struct sa1111_dev *sadev = SA1111_DEV(dev);
1217 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1220 if (drv && drv->resume)
1221 ret = drv->resume(sadev);
1225 static int sa1111_bus_probe(struct device *dev)
1227 struct sa1111_dev *sadev = SA1111_DEV(dev);
1228 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1232 ret = drv->probe(sadev);
1236 static int sa1111_bus_remove(struct device *dev)
1238 struct sa1111_dev *sadev = SA1111_DEV(dev);
1239 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1243 ret = drv->remove(sadev);
1247 struct bus_type sa1111_bus_type = {
1248 .name = "sa1111-rab",
1249 .match = sa1111_match,
1250 .probe = sa1111_bus_probe,
1251 .remove = sa1111_bus_remove,
1252 .suspend = sa1111_bus_suspend,
1253 .resume = sa1111_bus_resume,
1256 int sa1111_driver_register(struct sa1111_driver *driver)
1258 driver->drv.bus = &sa1111_bus_type;
1259 return driver_register(&driver->drv);
1262 void sa1111_driver_unregister(struct sa1111_driver *driver)
1264 driver_unregister(&driver->drv);
1267 static int __init sa1111_init(void)
1269 int ret = bus_register(&sa1111_bus_type);
1271 platform_driver_register(&sa1111_device_driver);
1275 static void __exit sa1111_exit(void)
1277 platform_driver_unregister(&sa1111_device_driver);
1278 bus_unregister(&sa1111_bus_type);
1281 subsys_initcall(sa1111_init);
1282 module_exit(sa1111_exit);
1284 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1285 MODULE_LICENSE("GPL");
1287 EXPORT_SYMBOL(sa1111_select_audio_mode);
1288 EXPORT_SYMBOL(sa1111_set_audio_rate);
1289 EXPORT_SYMBOL(sa1111_get_audio_rate);
1290 EXPORT_SYMBOL(sa1111_set_io_dir);
1291 EXPORT_SYMBOL(sa1111_set_io);
1292 EXPORT_SYMBOL(sa1111_set_sleep_io);
1293 EXPORT_SYMBOL(sa1111_enable_device);
1294 EXPORT_SYMBOL(sa1111_disable_device);
1295 EXPORT_SYMBOL(sa1111_pll_clock);
1296 EXPORT_SYMBOL(sa1111_bus_type);
1297 EXPORT_SYMBOL(sa1111_driver_register);
1298 EXPORT_SYMBOL(sa1111_driver_unregister);