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>
29 #include <linux/clk.h>
31 #include <asm/hardware.h>
32 #include <asm/mach-types.h>
35 #include <asm/mach/irq.h>
36 #include <asm/sizes.h>
38 #include <asm/hardware/sa1111.h>
40 extern void __init sa1110_mb_enable(void);
43 * We keep the following data for the overall SA1111. Note that the
44 * struct device and struct resource are "fake"; they should be supplied
45 * by the bus above us. However, in the interests of getting all SA1111
46 * drivers converted over to the device model, we provide this as an
47 * anchor point for all the other drivers.
59 * We _really_ need to eliminate this. Its only users
60 * are the PWM and DMA checking code.
62 static struct sa1111 *g_sa1111;
64 struct sa1111_dev_info {
66 unsigned long skpcr_mask;
71 static struct sa1111_dev_info sa1111_devices[] = {
74 .skpcr_mask = SKPCR_UCLKEN,
75 .devid = SA1111_DEVID_USB,
87 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
88 .devid = SA1111_DEVID_SAC,
98 .skpcr_mask = SKPCR_SCLKEN,
99 .devid = SA1111_DEVID_SSP,
102 .offset = SA1111_KBD,
103 .skpcr_mask = SKPCR_PTCLKEN,
104 .devid = SA1111_DEVID_PS2,
111 .offset = SA1111_MSE,
112 .skpcr_mask = SKPCR_PMCLKEN,
113 .devid = SA1111_DEVID_PS2,
122 .devid = SA1111_DEVID_PCMCIA,
134 void __init sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes)
136 unsigned int sz = SZ_1M >> PAGE_SHIFT;
141 size[1] = size[0] - sz;
146 * SA1111 interrupt support. Since clearing an IRQ while there are
147 * active IRQs causes the interrupt output to pulse, the upper levels
148 * will call us again if there are more interrupts to process.
151 sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
153 unsigned int stat0, stat1, i;
154 void __iomem *base = desc->data;
156 stat0 = sa1111_readl(base + SA1111_INTSTATCLR0);
157 stat1 = sa1111_readl(base + SA1111_INTSTATCLR1);
159 sa1111_writel(stat0, base + SA1111_INTSTATCLR0);
161 desc->chip->ack(irq);
163 sa1111_writel(stat1, base + SA1111_INTSTATCLR1);
165 if (stat0 == 0 && stat1 == 0) {
166 do_bad_IRQ(irq, desc, regs);
170 for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
172 do_edge_IRQ(i, irq_desc + i, regs);
174 for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
176 do_edge_IRQ(i, irq_desc + i, regs);
178 /* For level-based interrupts */
179 desc->chip->unmask(irq);
182 #define SA1111_IRQMASK_LO(x) (1 << (x - IRQ_SA1111_START))
183 #define SA1111_IRQMASK_HI(x) (1 << (x - IRQ_SA1111_START - 32))
185 static void sa1111_ack_irq(unsigned int irq)
189 static void sa1111_mask_lowirq(unsigned int irq)
191 void __iomem *mapbase = get_irq_chipdata(irq);
194 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
195 ie0 &= ~SA1111_IRQMASK_LO(irq);
196 writel(ie0, mapbase + SA1111_INTEN0);
199 static void sa1111_unmask_lowirq(unsigned int irq)
201 void __iomem *mapbase = get_irq_chipdata(irq);
204 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
205 ie0 |= SA1111_IRQMASK_LO(irq);
206 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
210 * Attempt to re-trigger the interrupt. The SA1111 contains a register
211 * (INTSET) which claims to do this. However, in practice no amount of
212 * manipulation of INTEN and INTSET guarantees that the interrupt will
213 * be triggered. In fact, its very difficult, if not impossible to get
214 * INTSET to re-trigger the interrupt.
216 static int sa1111_retrigger_lowirq(unsigned int irq)
218 unsigned int mask = SA1111_IRQMASK_LO(irq);
219 void __iomem *mapbase = get_irq_chipdata(irq);
223 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
224 for (i = 0; i < 8; i++) {
225 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
226 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
227 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
232 printk(KERN_ERR "Danger Will Robinson: failed to "
233 "re-trigger IRQ%d\n", irq);
234 return i == 8 ? -1 : 0;
237 static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
239 unsigned int mask = SA1111_IRQMASK_LO(irq);
240 void __iomem *mapbase = get_irq_chipdata(irq);
243 if (flags == IRQT_PROBE)
246 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
249 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
250 if (flags & __IRQT_RISEDGE)
254 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
255 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
260 static int sa1111_wake_lowirq(unsigned int irq, unsigned int on)
262 unsigned int mask = SA1111_IRQMASK_LO(irq);
263 void __iomem *mapbase = get_irq_chipdata(irq);
266 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
271 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
276 static struct irqchip sa1111_low_chip = {
277 .ack = sa1111_ack_irq,
278 .mask = sa1111_mask_lowirq,
279 .unmask = sa1111_unmask_lowirq,
280 .retrigger = sa1111_retrigger_lowirq,
281 .set_type = sa1111_type_lowirq,
282 .set_wake = sa1111_wake_lowirq,
285 static void sa1111_mask_highirq(unsigned int irq)
287 void __iomem *mapbase = get_irq_chipdata(irq);
290 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
291 ie1 &= ~SA1111_IRQMASK_HI(irq);
292 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
295 static void sa1111_unmask_highirq(unsigned int irq)
297 void __iomem *mapbase = get_irq_chipdata(irq);
300 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
301 ie1 |= SA1111_IRQMASK_HI(irq);
302 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
306 * Attempt to re-trigger the interrupt. The SA1111 contains a register
307 * (INTSET) which claims to do this. However, in practice no amount of
308 * manipulation of INTEN and INTSET guarantees that the interrupt will
309 * be triggered. In fact, its very difficult, if not impossible to get
310 * INTSET to re-trigger the interrupt.
312 static int sa1111_retrigger_highirq(unsigned int irq)
314 unsigned int mask = SA1111_IRQMASK_HI(irq);
315 void __iomem *mapbase = get_irq_chipdata(irq);
319 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
320 for (i = 0; i < 8; i++) {
321 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
322 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
323 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
328 printk(KERN_ERR "Danger Will Robinson: failed to "
329 "re-trigger IRQ%d\n", irq);
330 return i == 8 ? -1 : 0;
333 static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
335 unsigned int mask = SA1111_IRQMASK_HI(irq);
336 void __iomem *mapbase = get_irq_chipdata(irq);
339 if (flags == IRQT_PROBE)
342 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
345 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
346 if (flags & __IRQT_RISEDGE)
350 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
351 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
356 static int sa1111_wake_highirq(unsigned int irq, unsigned int on)
358 unsigned int mask = SA1111_IRQMASK_HI(irq);
359 void __iomem *mapbase = get_irq_chipdata(irq);
362 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
367 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
372 static struct irqchip sa1111_high_chip = {
373 .ack = sa1111_ack_irq,
374 .mask = sa1111_mask_highirq,
375 .unmask = sa1111_unmask_highirq,
376 .retrigger = sa1111_retrigger_highirq,
377 .set_type = sa1111_type_highirq,
378 .set_wake = sa1111_wake_highirq,
381 static void sa1111_setup_irq(struct sa1111 *sachip)
383 void __iomem *irqbase = sachip->base + SA1111_INTC;
387 * We're guaranteed that this region hasn't been taken.
389 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
391 /* disable all IRQs */
392 sa1111_writel(0, irqbase + SA1111_INTEN0);
393 sa1111_writel(0, irqbase + SA1111_INTEN1);
394 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
395 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
398 * detect on rising edge. Note: Feb 2001 Errata for SA1111
399 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
401 sa1111_writel(0, irqbase + SA1111_INTPOL0);
402 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
403 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
404 irqbase + SA1111_INTPOL1);
407 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
408 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
410 for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) {
411 set_irq_chip(irq, &sa1111_low_chip);
412 set_irq_chipdata(irq, irqbase);
413 set_irq_handler(irq, do_edge_IRQ);
414 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
417 for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) {
418 set_irq_chip(irq, &sa1111_high_chip);
419 set_irq_chipdata(irq, irqbase);
420 set_irq_handler(irq, do_edge_IRQ);
421 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
425 * Register SA1111 interrupt
427 set_irq_type(sachip->irq, IRQT_RISING);
428 set_irq_data(sachip->irq, irqbase);
429 set_irq_chained_handler(sachip->irq, sa1111_irq_handler);
433 * Bring the SA1111 out of reset. This requires a set procedure:
434 * 1. nRESET asserted (by hardware)
435 * 2. CLK turned on from SA1110
436 * 3. nRESET deasserted
437 * 4. VCO turned on, PLL_BYPASS turned off
438 * 5. Wait lock time, then assert RCLKEn
439 * 7. PCR set to allow clocking of individual functions
441 * Until we've done this, the only registers we can access are:
446 static void sa1111_wake(struct sa1111 *sachip)
448 unsigned long flags, r;
450 spin_lock_irqsave(&sachip->lock, flags);
452 clk_enable(sachip->clk);
455 * Turn VCO on, and disable PLL Bypass.
457 r = sa1111_readl(sachip->base + SA1111_SKCR);
459 sa1111_writel(r, sachip->base + SA1111_SKCR);
460 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
461 sa1111_writel(r, sachip->base + SA1111_SKCR);
464 * Wait lock time. SA1111 manual _doesn't_
465 * specify a figure for this! We choose 100us.
470 * Enable RCLK. We also ensure that RDYEN is set.
472 r |= SKCR_RCLKEN | SKCR_RDYEN;
473 sa1111_writel(r, sachip->base + SA1111_SKCR);
476 * Wait 14 RCLK cycles for the chip to finish coming out
477 * of reset. (RCLK=24MHz). This is 590ns.
482 * Ensure all clocks are initially off.
484 sa1111_writel(0, sachip->base + SA1111_SKPCR);
486 spin_unlock_irqrestore(&sachip->lock, flags);
489 #ifdef CONFIG_ARCH_SA1100
491 static u32 sa1111_dma_mask[] = {
503 * Configure the SA1111 shared memory controller.
506 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
507 unsigned int cas_latency)
509 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
511 if (cas_latency == 3)
514 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
517 * Now clear the bits in the DMA mask to work around the SA1111
518 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
519 * Chip Specification Update, June 2000, Erratum #7).
521 if (sachip->dev->dma_mask)
522 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
524 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
529 static void sa1111_dev_release(struct device *_dev)
531 struct sa1111_dev *dev = SA1111_DEV(_dev);
533 release_resource(&dev->res);
538 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
539 struct sa1111_dev_info *info)
541 struct sa1111_dev *dev;
544 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
550 snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
551 "%4.4lx", info->offset);
553 dev->devid = info->devid;
554 dev->dev.parent = sachip->dev;
555 dev->dev.bus = &sa1111_bus_type;
556 dev->dev.release = sa1111_dev_release;
557 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
558 dev->res.start = sachip->phys + info->offset;
559 dev->res.end = dev->res.start + 511;
560 dev->res.name = dev->dev.bus_id;
561 dev->res.flags = IORESOURCE_MEM;
562 dev->mapbase = sachip->base + info->offset;
563 dev->skpcr_mask = info->skpcr_mask;
564 memmove(dev->irq, info->irq, sizeof(dev->irq));
566 ret = request_resource(parent, &dev->res);
568 printk("SA1111: failed to allocate resource for %s\n",
575 ret = device_register(&dev->dev);
577 release_resource(&dev->res);
583 * If the parent device has a DMA mask associated with it,
584 * propagate it down to the children.
586 if (sachip->dev->dma_mask) {
587 dev->dma_mask = *sachip->dev->dma_mask;
588 dev->dev.dma_mask = &dev->dma_mask;
590 if (dev->dma_mask != 0xffffffffUL) {
591 ret = dmabounce_register_dev(&dev->dev, 1024, 4096);
593 printk("SA1111: Failed to register %s with dmabounce", dev->dev.bus_id);
594 device_unregister(&dev->dev);
604 * sa1111_probe - probe for a single SA1111 chip.
605 * @phys_addr: physical address of device.
607 * Probe for a SA1111 chip. This must be called
608 * before any other SA1111-specific code.
611 * %-ENODEV device not found.
612 * %-EBUSY physical address already marked in-use.
616 __sa1111_probe(struct device *me, struct resource *mem, int irq)
618 struct sa1111 *sachip;
620 unsigned int has_devs, val;
621 int i, ret = -ENODEV;
623 sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL);
627 sachip->clk = clk_get(me, "GPIO27_CLK");
629 ret = PTR_ERR(sachip->clk);
633 spin_lock_init(&sachip->lock);
636 dev_set_drvdata(sachip->dev, sachip);
638 sachip->phys = mem->start;
642 * Map the whole region. This also maps the
643 * registers for our children.
645 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
652 * Probe for the chip. Only touch the SBI registers.
654 id = sa1111_readl(sachip->base + SA1111_SKID);
655 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
656 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
661 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
662 "silicon revision %lx, metal revision %lx\n",
663 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
666 * We found it. Wake the chip up, and initialise.
670 #ifdef CONFIG_ARCH_SA1100
672 * The SDRAM configuration of the SA1110 and the SA1111 must
673 * match. This is very important to ensure that SA1111 accesses
674 * don't corrupt the SDRAM. Note that this ungates the SA1111's
675 * MBGNT signal, so we must have called sa1110_mb_disable()
678 sa1111_configure_smc(sachip, 1,
679 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
680 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
683 * We only need to turn on DCLK whenever we want to use the
684 * DMA. It can otherwise be held firmly in the off position.
685 * (currently, we always enable it.)
687 val = sa1111_readl(sachip->base + SA1111_SKPCR);
688 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
691 * Enable the SA1110 memory bus request and grant signals.
697 * The interrupt controller must be initialised before any
698 * other device to ensure that the interrupts are available.
700 if (sachip->irq != NO_IRQ)
701 sa1111_setup_irq(sachip);
706 if (machine_is_assabet() || machine_is_jornada720() ||
708 has_devs &= ~(1 << 4);
710 has_devs &= ~(1 << 1);
712 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
713 if (has_devs & (1 << i))
714 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
719 iounmap(sachip->base);
721 clk_put(sachip->clk);
727 static int sa1111_remove_one(struct device *dev, void *data)
729 device_unregister(dev);
733 static void __sa1111_remove(struct sa1111 *sachip)
735 void __iomem *irqbase = sachip->base + SA1111_INTC;
737 device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
739 /* disable all IRQs */
740 sa1111_writel(0, irqbase + SA1111_INTEN0);
741 sa1111_writel(0, irqbase + SA1111_INTEN1);
742 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
743 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
745 clk_disable(sachip->clk);
747 if (sachip->irq != NO_IRQ) {
748 set_irq_chained_handler(sachip->irq, NULL);
749 set_irq_data(sachip->irq, NULL);
751 release_mem_region(sachip->phys + SA1111_INTC, 512);
754 iounmap(sachip->base);
755 clk_put(sachip->clk);
760 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
761 * Chip Specification Update" (June 2000), erratum #7, there is a
762 * significant bug in the SA1111 SDRAM shared memory controller. If
763 * an access to a region of memory above 1MB relative to the bank base,
764 * it is important that address bit 10 _NOT_ be asserted. Depending
765 * on the configuration of the RAM, bit 10 may correspond to one
766 * of several different (processor-relative) address bits.
768 * This routine only identifies whether or not a given DMA address
769 * is susceptible to the bug.
771 * This should only get called for sa1111_device types due to the
772 * way we configure our device dma_masks.
774 int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
777 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
778 * User's Guide" mentions that jumpers R51 and R52 control the
779 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
780 * SDRAM bank 1 on Neponset). The default configuration selects
781 * Assabet, so any address in bank 1 is necessarily invalid.
783 return ((machine_is_assabet() || machine_is_pfs168()) &&
784 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000));
787 struct sa1111_save_data {
792 unsigned char skpwm0;
793 unsigned char skpwm1;
796 * Interrupt controller
798 unsigned int intpol0;
799 unsigned int intpol1;
802 unsigned int wakepol0;
803 unsigned int wakepol1;
804 unsigned int wakeen0;
805 unsigned int wakeen1;
810 static int sa1111_suspend(struct platform_device *dev, pm_message_t state)
812 struct sa1111 *sachip = platform_get_drvdata(dev);
813 struct sa1111_save_data *save;
818 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
821 dev->dev.power.saved_state = save;
823 spin_lock_irqsave(&sachip->lock, flags);
829 save->skcr = sa1111_readl(base + SA1111_SKCR);
830 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
831 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
832 save->skaud = sa1111_readl(base + SA1111_SKAUD);
833 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
834 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
836 base = sachip->base + SA1111_INTC;
837 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
838 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
839 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
840 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
841 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
842 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
843 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
844 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
849 val = sa1111_readl(sachip->base + SA1111_SKCR);
850 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
851 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
852 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
854 clk_disable(sachip->clk);
856 spin_unlock_irqrestore(&sachip->lock, flags);
862 * sa1111_resume - Restore the SA1111 device state.
863 * @dev: device to restore
865 * Restore the general state of the SA1111; clock control and
866 * interrupt controller. Other parts of the SA1111 must be
867 * restored by their respective drivers, and must be called
868 * via LDM after this function.
870 static int sa1111_resume(struct platform_device *dev)
872 struct sa1111 *sachip = platform_get_drvdata(dev);
873 struct sa1111_save_data *save;
874 unsigned long flags, id;
877 save = (struct sa1111_save_data *)dev->dev.power.saved_state;
881 spin_lock_irqsave(&sachip->lock, flags);
884 * Ensure that the SA1111 is still here.
885 * FIXME: shouldn't do this here.
887 id = sa1111_readl(sachip->base + SA1111_SKID);
888 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
889 __sa1111_remove(sachip);
890 platform_set_drvdata(dev, NULL);
896 * First of all, wake up the chip.
899 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
900 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
903 sa1111_writel(save->skcr, base + SA1111_SKCR);
904 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
905 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
906 sa1111_writel(save->skaud, base + SA1111_SKAUD);
907 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
908 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
910 base = sachip->base + SA1111_INTC;
911 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
912 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
913 sa1111_writel(save->inten0, base + SA1111_INTEN0);
914 sa1111_writel(save->inten1, base + SA1111_INTEN1);
915 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
916 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
917 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
918 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
920 spin_unlock_irqrestore(&sachip->lock, flags);
922 dev->dev.power.saved_state = NULL;
929 #define sa1111_suspend NULL
930 #define sa1111_resume NULL
933 static int sa1111_probe(struct platform_device *pdev)
935 struct resource *mem;
938 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
941 irq = platform_get_irq(pdev, 0);
945 return __sa1111_probe(&pdev->dev, mem, irq);
948 static int sa1111_remove(struct platform_device *pdev)
950 struct sa1111 *sachip = platform_get_drvdata(pdev);
953 __sa1111_remove(sachip);
954 platform_set_drvdata(pdev, NULL);
957 kfree(pdev->dev.power.saved_state);
958 pdev->dev.power.saved_state = NULL;
966 * Not sure if this should be on the system bus or not yet.
967 * We really want some way to register a system device at
968 * the per-machine level, and then have this driver pick
969 * up the registered devices.
971 * We also need to handle the SDRAM configuration for
972 * PXA250/SA1110 machine classes.
974 static struct platform_driver sa1111_device_driver = {
975 .probe = sa1111_probe,
976 .remove = sa1111_remove,
977 .suspend = sa1111_suspend,
978 .resume = sa1111_resume,
985 * Get the parent device driver (us) structure
986 * from a child function device
988 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
990 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
994 * The bits in the opdiv field are non-linear.
996 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
998 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
1000 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1002 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
1004 fbdiv = (skcdr & 0x007f) + 2;
1005 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1006 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1008 return 3686400 * fbdiv / (ipdiv * opdiv);
1012 * sa1111_pll_clock - return the current PLL clock frequency.
1013 * @sadev: SA1111 function block
1015 * BUG: we should look at SKCR. We also blindly believe that
1016 * the chip is being fed with the 3.6864MHz clock.
1018 * Returns the PLL clock in Hz.
1020 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1022 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1024 return __sa1111_pll_clock(sachip);
1028 * sa1111_select_audio_mode - select I2S or AC link mode
1029 * @sadev: SA1111 function block
1030 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1032 * Frob the SKCR to select AC Link mode or I2S mode for
1035 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1037 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1038 unsigned long flags;
1041 spin_lock_irqsave(&sachip->lock, flags);
1043 val = sa1111_readl(sachip->base + SA1111_SKCR);
1044 if (mode == SA1111_AUDIO_I2S) {
1049 sa1111_writel(val, sachip->base + SA1111_SKCR);
1051 spin_unlock_irqrestore(&sachip->lock, flags);
1055 * sa1111_set_audio_rate - set the audio sample rate
1056 * @sadev: SA1111 SAC function block
1057 * @rate: sample rate to select
1059 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1061 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1064 if (sadev->devid != SA1111_DEVID_SAC)
1067 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1073 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1079 * sa1111_get_audio_rate - get the audio sample rate
1080 * @sadev: SA1111 SAC function block device
1082 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1084 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1087 if (sadev->devid != SA1111_DEVID_SAC)
1090 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1092 return __sa1111_pll_clock(sachip) / (256 * div);
1095 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1096 unsigned int bits, unsigned int dir,
1097 unsigned int sleep_dir)
1099 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1100 unsigned long flags;
1102 void __iomem *gpio = sachip->base + SA1111_GPIO;
1104 #define MODIFY_BITS(port, mask, dir) \
1106 val = sa1111_readl(port); \
1108 val |= (dir) & (mask); \
1109 sa1111_writel(val, port); \
1112 spin_lock_irqsave(&sachip->lock, flags);
1113 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1114 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1115 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1117 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1118 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1119 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1120 spin_unlock_irqrestore(&sachip->lock, flags);
1123 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1125 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1126 unsigned long flags;
1128 void __iomem *gpio = sachip->base + SA1111_GPIO;
1130 spin_lock_irqsave(&sachip->lock, flags);
1131 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1132 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1133 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1134 spin_unlock_irqrestore(&sachip->lock, flags);
1137 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1139 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1140 unsigned long flags;
1142 void __iomem *gpio = sachip->base + SA1111_GPIO;
1144 spin_lock_irqsave(&sachip->lock, flags);
1145 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1146 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1147 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1148 spin_unlock_irqrestore(&sachip->lock, flags);
1152 * Individual device operations.
1156 * sa1111_enable_device - enable an on-chip SA1111 function block
1157 * @sadev: SA1111 function block device to enable
1159 void sa1111_enable_device(struct sa1111_dev *sadev)
1161 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1162 unsigned long flags;
1165 spin_lock_irqsave(&sachip->lock, flags);
1166 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1167 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1168 spin_unlock_irqrestore(&sachip->lock, flags);
1172 * sa1111_disable_device - disable an on-chip SA1111 function block
1173 * @sadev: SA1111 function block device to disable
1175 void sa1111_disable_device(struct sa1111_dev *sadev)
1177 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1178 unsigned long flags;
1181 spin_lock_irqsave(&sachip->lock, flags);
1182 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1183 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1184 spin_unlock_irqrestore(&sachip->lock, flags);
1188 * SA1111 "Register Access Bus."
1190 * We model this as a regular bus type, and hang devices directly
1193 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1195 struct sa1111_dev *dev = SA1111_DEV(_dev);
1196 struct sa1111_driver *drv = SA1111_DRV(_drv);
1198 return dev->devid == drv->devid;
1201 static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1203 struct sa1111_dev *sadev = SA1111_DEV(dev);
1204 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1207 if (drv && drv->suspend)
1208 ret = drv->suspend(sadev, state);
1212 static int sa1111_bus_resume(struct device *dev)
1214 struct sa1111_dev *sadev = SA1111_DEV(dev);
1215 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1218 if (drv && drv->resume)
1219 ret = drv->resume(sadev);
1223 static int sa1111_bus_probe(struct device *dev)
1225 struct sa1111_dev *sadev = SA1111_DEV(dev);
1226 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1230 ret = drv->probe(sadev);
1234 static int sa1111_bus_remove(struct device *dev)
1236 struct sa1111_dev *sadev = SA1111_DEV(dev);
1237 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1241 ret = drv->remove(sadev);
1245 struct bus_type sa1111_bus_type = {
1246 .name = "sa1111-rab",
1247 .match = sa1111_match,
1248 .probe = sa1111_bus_probe,
1249 .remove = sa1111_bus_remove,
1250 .suspend = sa1111_bus_suspend,
1251 .resume = sa1111_bus_resume,
1254 int sa1111_driver_register(struct sa1111_driver *driver)
1256 driver->drv.bus = &sa1111_bus_type;
1257 return driver_register(&driver->drv);
1260 void sa1111_driver_unregister(struct sa1111_driver *driver)
1262 driver_unregister(&driver->drv);
1265 static int __init sa1111_init(void)
1267 int ret = bus_register(&sa1111_bus_type);
1269 platform_driver_register(&sa1111_device_driver);
1273 static void __exit sa1111_exit(void)
1275 platform_driver_unregister(&sa1111_device_driver);
1276 bus_unregister(&sa1111_bus_type);
1279 subsys_initcall(sa1111_init);
1280 module_exit(sa1111_exit);
1282 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1283 MODULE_LICENSE("GPL");
1285 EXPORT_SYMBOL(sa1111_select_audio_mode);
1286 EXPORT_SYMBOL(sa1111_set_audio_rate);
1287 EXPORT_SYMBOL(sa1111_get_audio_rate);
1288 EXPORT_SYMBOL(sa1111_set_io_dir);
1289 EXPORT_SYMBOL(sa1111_set_io);
1290 EXPORT_SYMBOL(sa1111_set_sleep_io);
1291 EXPORT_SYMBOL(sa1111_enable_device);
1292 EXPORT_SYMBOL(sa1111_disable_device);
1293 EXPORT_SYMBOL(sa1111_pll_clock);
1294 EXPORT_SYMBOL(sa1111_bus_type);
1295 EXPORT_SYMBOL(sa1111_driver_register);
1296 EXPORT_SYMBOL(sa1111_driver_unregister);