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/module.h>
18 #include <linux/init.h>
19 #include <linux/kernel.h>
20 #include <linux/delay.h>
21 #include <linux/ptrace.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>
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 extern void __init sa1110_mb_enable(void);
42 * We keep the following data for the overall SA1111. Note that the
43 * struct device and struct resource are "fake"; they should be supplied
44 * by the bus above us. However, in the interests of getting all SA1111
45 * drivers converted over to the device model, we provide this as an
46 * anchor point for all the other drivers.
58 * We _really_ need to eliminate this. Its only users
59 * are the PWM and DMA checking code.
61 static struct sa1111 *g_sa1111;
63 struct sa1111_dev_info {
65 unsigned long skpcr_mask;
70 static struct sa1111_dev_info sa1111_devices[] = {
73 .skpcr_mask = SKPCR_UCLKEN,
74 .devid = SA1111_DEVID_USB,
86 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
87 .devid = SA1111_DEVID_SAC,
97 .skpcr_mask = SKPCR_SCLKEN,
98 .devid = SA1111_DEVID_SSP,
101 .offset = SA1111_KBD,
102 .skpcr_mask = SKPCR_PTCLKEN,
103 .devid = SA1111_DEVID_PS2,
110 .offset = SA1111_MSE,
111 .skpcr_mask = SKPCR_PMCLKEN,
112 .devid = SA1111_DEVID_PS2,
121 .devid = SA1111_DEVID_PCMCIA,
133 void __init sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes)
135 unsigned int sz = SZ_1M >> PAGE_SHIFT;
140 size[1] = size[0] - sz;
145 * SA1111 interrupt support. Since clearing an IRQ while there are
146 * active IRQs causes the interrupt output to pulse, the upper levels
147 * will call us again if there are more interrupts to process.
150 sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
152 unsigned int stat0, stat1, i;
153 void __iomem *base = get_irq_data(irq);
155 stat0 = sa1111_readl(base + SA1111_INTSTATCLR0);
156 stat1 = sa1111_readl(base + SA1111_INTSTATCLR1);
158 sa1111_writel(stat0, base + SA1111_INTSTATCLR0);
160 desc->chip->ack(irq);
162 sa1111_writel(stat1, base + SA1111_INTSTATCLR1);
164 if (stat0 == 0 && stat1 == 0) {
165 do_bad_IRQ(irq, desc, regs);
169 for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
171 handle_edge_irq(i, irq_desc + i, regs);
173 for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
175 handle_edge_irq(i, irq_desc + i, regs);
177 /* For level-based interrupts */
178 desc->chip->unmask(irq);
181 #define SA1111_IRQMASK_LO(x) (1 << (x - IRQ_SA1111_START))
182 #define SA1111_IRQMASK_HI(x) (1 << (x - IRQ_SA1111_START - 32))
184 static void sa1111_ack_irq(unsigned int irq)
188 static void sa1111_mask_lowirq(unsigned int irq)
190 void __iomem *mapbase = get_irq_chipdata(irq);
193 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
194 ie0 &= ~SA1111_IRQMASK_LO(irq);
195 writel(ie0, mapbase + SA1111_INTEN0);
198 static void sa1111_unmask_lowirq(unsigned int irq)
200 void __iomem *mapbase = get_irq_chipdata(irq);
203 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
204 ie0 |= SA1111_IRQMASK_LO(irq);
205 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
209 * Attempt to re-trigger the interrupt. The SA1111 contains a register
210 * (INTSET) which claims to do this. However, in practice no amount of
211 * manipulation of INTEN and INTSET guarantees that the interrupt will
212 * be triggered. In fact, its very difficult, if not impossible to get
213 * INTSET to re-trigger the interrupt.
215 static int sa1111_retrigger_lowirq(unsigned int irq)
217 unsigned int mask = SA1111_IRQMASK_LO(irq);
218 void __iomem *mapbase = get_irq_chipdata(irq);
222 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
223 for (i = 0; i < 8; i++) {
224 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
225 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
226 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
231 printk(KERN_ERR "Danger Will Robinson: failed to "
232 "re-trigger IRQ%d\n", irq);
233 return i == 8 ? -1 : 0;
236 static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
238 unsigned int mask = SA1111_IRQMASK_LO(irq);
239 void __iomem *mapbase = get_irq_chipdata(irq);
242 if (flags == IRQT_PROBE)
245 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
248 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
249 if (flags & __IRQT_RISEDGE)
253 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
254 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
259 static int sa1111_wake_lowirq(unsigned int irq, unsigned int on)
261 unsigned int mask = SA1111_IRQMASK_LO(irq);
262 void __iomem *mapbase = get_irq_chipdata(irq);
265 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
270 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
275 static struct irqchip sa1111_low_chip = {
276 .ack = sa1111_ack_irq,
277 .mask = sa1111_mask_lowirq,
278 .unmask = sa1111_unmask_lowirq,
279 .retrigger = sa1111_retrigger_lowirq,
280 .set_type = sa1111_type_lowirq,
281 .set_wake = sa1111_wake_lowirq,
284 static void sa1111_mask_highirq(unsigned int irq)
286 void __iomem *mapbase = get_irq_chipdata(irq);
289 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
290 ie1 &= ~SA1111_IRQMASK_HI(irq);
291 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
294 static void sa1111_unmask_highirq(unsigned int irq)
296 void __iomem *mapbase = get_irq_chipdata(irq);
299 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
300 ie1 |= SA1111_IRQMASK_HI(irq);
301 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
305 * Attempt to re-trigger the interrupt. The SA1111 contains a register
306 * (INTSET) which claims to do this. However, in practice no amount of
307 * manipulation of INTEN and INTSET guarantees that the interrupt will
308 * be triggered. In fact, its very difficult, if not impossible to get
309 * INTSET to re-trigger the interrupt.
311 static int sa1111_retrigger_highirq(unsigned int irq)
313 unsigned int mask = SA1111_IRQMASK_HI(irq);
314 void __iomem *mapbase = get_irq_chipdata(irq);
318 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
319 for (i = 0; i < 8; i++) {
320 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
321 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
322 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
327 printk(KERN_ERR "Danger Will Robinson: failed to "
328 "re-trigger IRQ%d\n", irq);
329 return i == 8 ? -1 : 0;
332 static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
334 unsigned int mask = SA1111_IRQMASK_HI(irq);
335 void __iomem *mapbase = get_irq_chipdata(irq);
338 if (flags == IRQT_PROBE)
341 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
344 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
345 if (flags & __IRQT_RISEDGE)
349 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
350 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
355 static int sa1111_wake_highirq(unsigned int irq, unsigned int on)
357 unsigned int mask = SA1111_IRQMASK_HI(irq);
358 void __iomem *mapbase = get_irq_chipdata(irq);
361 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
366 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
371 static struct irqchip sa1111_high_chip = {
372 .ack = sa1111_ack_irq,
373 .mask = sa1111_mask_highirq,
374 .unmask = sa1111_unmask_highirq,
375 .retrigger = sa1111_retrigger_highirq,
376 .set_type = sa1111_type_highirq,
377 .set_wake = sa1111_wake_highirq,
380 static void sa1111_setup_irq(struct sa1111 *sachip)
382 void __iomem *irqbase = sachip->base + SA1111_INTC;
386 * We're guaranteed that this region hasn't been taken.
388 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
390 /* disable all IRQs */
391 sa1111_writel(0, irqbase + SA1111_INTEN0);
392 sa1111_writel(0, irqbase + SA1111_INTEN1);
393 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
394 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
397 * detect on rising edge. Note: Feb 2001 Errata for SA1111
398 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
400 sa1111_writel(0, irqbase + SA1111_INTPOL0);
401 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
402 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
403 irqbase + SA1111_INTPOL1);
406 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
407 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
409 for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) {
410 set_irq_chip(irq, &sa1111_low_chip);
411 set_irq_chipdata(irq, irqbase);
412 set_irq_handler(irq, do_edge_IRQ);
413 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
416 for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) {
417 set_irq_chip(irq, &sa1111_high_chip);
418 set_irq_chipdata(irq, irqbase);
419 set_irq_handler(irq, do_edge_IRQ);
420 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
424 * Register SA1111 interrupt
426 set_irq_type(sachip->irq, IRQT_RISING);
427 set_irq_data(sachip->irq, irqbase);
428 set_irq_chained_handler(sachip->irq, sa1111_irq_handler);
432 * Bring the SA1111 out of reset. This requires a set procedure:
433 * 1. nRESET asserted (by hardware)
434 * 2. CLK turned on from SA1110
435 * 3. nRESET deasserted
436 * 4. VCO turned on, PLL_BYPASS turned off
437 * 5. Wait lock time, then assert RCLKEn
438 * 7. PCR set to allow clocking of individual functions
440 * Until we've done this, the only registers we can access are:
445 static void sa1111_wake(struct sa1111 *sachip)
447 unsigned long flags, r;
449 spin_lock_irqsave(&sachip->lock, flags);
451 clk_enable(sachip->clk);
454 * Turn VCO on, and disable PLL Bypass.
456 r = sa1111_readl(sachip->base + SA1111_SKCR);
458 sa1111_writel(r, sachip->base + SA1111_SKCR);
459 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
460 sa1111_writel(r, sachip->base + SA1111_SKCR);
463 * Wait lock time. SA1111 manual _doesn't_
464 * specify a figure for this! We choose 100us.
469 * Enable RCLK. We also ensure that RDYEN is set.
471 r |= SKCR_RCLKEN | SKCR_RDYEN;
472 sa1111_writel(r, sachip->base + SA1111_SKCR);
475 * Wait 14 RCLK cycles for the chip to finish coming out
476 * of reset. (RCLK=24MHz). This is 590ns.
481 * Ensure all clocks are initially off.
483 sa1111_writel(0, sachip->base + SA1111_SKPCR);
485 spin_unlock_irqrestore(&sachip->lock, flags);
488 #ifdef CONFIG_ARCH_SA1100
490 static u32 sa1111_dma_mask[] = {
502 * Configure the SA1111 shared memory controller.
505 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
506 unsigned int cas_latency)
508 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
510 if (cas_latency == 3)
513 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
516 * Now clear the bits in the DMA mask to work around the SA1111
517 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
518 * Chip Specification Update, June 2000, Erratum #7).
520 if (sachip->dev->dma_mask)
521 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
523 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
528 static void sa1111_dev_release(struct device *_dev)
530 struct sa1111_dev *dev = SA1111_DEV(_dev);
532 release_resource(&dev->res);
537 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
538 struct sa1111_dev_info *info)
540 struct sa1111_dev *dev;
543 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
549 snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
550 "%4.4lx", info->offset);
552 dev->devid = info->devid;
553 dev->dev.parent = sachip->dev;
554 dev->dev.bus = &sa1111_bus_type;
555 dev->dev.release = sa1111_dev_release;
556 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
557 dev->res.start = sachip->phys + info->offset;
558 dev->res.end = dev->res.start + 511;
559 dev->res.name = dev->dev.bus_id;
560 dev->res.flags = IORESOURCE_MEM;
561 dev->mapbase = sachip->base + info->offset;
562 dev->skpcr_mask = info->skpcr_mask;
563 memmove(dev->irq, info->irq, sizeof(dev->irq));
565 ret = request_resource(parent, &dev->res);
567 printk("SA1111: failed to allocate resource for %s\n",
574 ret = device_register(&dev->dev);
576 release_resource(&dev->res);
582 * If the parent device has a DMA mask associated with it,
583 * propagate it down to the children.
585 if (sachip->dev->dma_mask) {
586 dev->dma_mask = *sachip->dev->dma_mask;
587 dev->dev.dma_mask = &dev->dma_mask;
589 if (dev->dma_mask != 0xffffffffUL) {
590 ret = dmabounce_register_dev(&dev->dev, 1024, 4096);
592 printk("SA1111: Failed to register %s with dmabounce", dev->dev.bus_id);
593 device_unregister(&dev->dev);
603 * sa1111_probe - probe for a single SA1111 chip.
604 * @phys_addr: physical address of device.
606 * Probe for a SA1111 chip. This must be called
607 * before any other SA1111-specific code.
610 * %-ENODEV device not found.
611 * %-EBUSY physical address already marked in-use.
615 __sa1111_probe(struct device *me, struct resource *mem, int irq)
617 struct sa1111 *sachip;
619 unsigned int has_devs, val;
620 int i, ret = -ENODEV;
622 sachip = kzalloc(sizeof(struct sa1111), GFP_KERNEL);
626 sachip->clk = clk_get(me, "GPIO27_CLK");
628 ret = PTR_ERR(sachip->clk);
632 spin_lock_init(&sachip->lock);
635 dev_set_drvdata(sachip->dev, sachip);
637 sachip->phys = mem->start;
641 * Map the whole region. This also maps the
642 * registers for our children.
644 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
651 * Probe for the chip. Only touch the SBI registers.
653 id = sa1111_readl(sachip->base + SA1111_SKID);
654 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
655 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
660 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
661 "silicon revision %lx, metal revision %lx\n",
662 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
665 * We found it. Wake the chip up, and initialise.
669 #ifdef CONFIG_ARCH_SA1100
671 * The SDRAM configuration of the SA1110 and the SA1111 must
672 * match. This is very important to ensure that SA1111 accesses
673 * don't corrupt the SDRAM. Note that this ungates the SA1111's
674 * MBGNT signal, so we must have called sa1110_mb_disable()
677 sa1111_configure_smc(sachip, 1,
678 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
679 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
682 * We only need to turn on DCLK whenever we want to use the
683 * DMA. It can otherwise be held firmly in the off position.
684 * (currently, we always enable it.)
686 val = sa1111_readl(sachip->base + SA1111_SKPCR);
687 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
690 * Enable the SA1110 memory bus request and grant signals.
696 * The interrupt controller must be initialised before any
697 * other device to ensure that the interrupts are available.
699 if (sachip->irq != NO_IRQ)
700 sa1111_setup_irq(sachip);
705 if (machine_is_assabet() || machine_is_jornada720() ||
707 has_devs &= ~(1 << 4);
709 has_devs &= ~(1 << 1);
711 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
712 if (has_devs & (1 << i))
713 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
718 iounmap(sachip->base);
720 clk_put(sachip->clk);
726 static int sa1111_remove_one(struct device *dev, void *data)
728 device_unregister(dev);
732 static void __sa1111_remove(struct sa1111 *sachip)
734 void __iomem *irqbase = sachip->base + SA1111_INTC;
736 device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
738 /* disable all IRQs */
739 sa1111_writel(0, irqbase + SA1111_INTEN0);
740 sa1111_writel(0, irqbase + SA1111_INTEN1);
741 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
742 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
744 clk_disable(sachip->clk);
746 if (sachip->irq != NO_IRQ) {
747 set_irq_chained_handler(sachip->irq, NULL);
748 set_irq_data(sachip->irq, NULL);
750 release_mem_region(sachip->phys + SA1111_INTC, 512);
753 iounmap(sachip->base);
754 clk_put(sachip->clk);
759 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
760 * Chip Specification Update" (June 2000), erratum #7, there is a
761 * significant bug in the SA1111 SDRAM shared memory controller. If
762 * an access to a region of memory above 1MB relative to the bank base,
763 * it is important that address bit 10 _NOT_ be asserted. Depending
764 * on the configuration of the RAM, bit 10 may correspond to one
765 * of several different (processor-relative) address bits.
767 * This routine only identifies whether or not a given DMA address
768 * is susceptible to the bug.
770 * This should only get called for sa1111_device types due to the
771 * way we configure our device dma_masks.
773 int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
776 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
777 * User's Guide" mentions that jumpers R51 and R52 control the
778 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
779 * SDRAM bank 1 on Neponset). The default configuration selects
780 * Assabet, so any address in bank 1 is necessarily invalid.
782 return ((machine_is_assabet() || machine_is_pfs168()) &&
783 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000));
786 struct sa1111_save_data {
791 unsigned char skpwm0;
792 unsigned char skpwm1;
795 * Interrupt controller
797 unsigned int intpol0;
798 unsigned int intpol1;
801 unsigned int wakepol0;
802 unsigned int wakepol1;
803 unsigned int wakeen0;
804 unsigned int wakeen1;
809 static int sa1111_suspend(struct platform_device *dev, pm_message_t state)
811 struct sa1111 *sachip = platform_get_drvdata(dev);
812 struct sa1111_save_data *save;
817 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
820 dev->dev.power.saved_state = save;
822 spin_lock_irqsave(&sachip->lock, flags);
828 save->skcr = sa1111_readl(base + SA1111_SKCR);
829 save->skpcr = sa1111_readl(base + SA1111_SKPCR);
830 save->skcdr = sa1111_readl(base + SA1111_SKCDR);
831 save->skaud = sa1111_readl(base + SA1111_SKAUD);
832 save->skpwm0 = sa1111_readl(base + SA1111_SKPWM0);
833 save->skpwm1 = sa1111_readl(base + SA1111_SKPWM1);
835 base = sachip->base + SA1111_INTC;
836 save->intpol0 = sa1111_readl(base + SA1111_INTPOL0);
837 save->intpol1 = sa1111_readl(base + SA1111_INTPOL1);
838 save->inten0 = sa1111_readl(base + SA1111_INTEN0);
839 save->inten1 = sa1111_readl(base + SA1111_INTEN1);
840 save->wakepol0 = sa1111_readl(base + SA1111_WAKEPOL0);
841 save->wakepol1 = sa1111_readl(base + SA1111_WAKEPOL1);
842 save->wakeen0 = sa1111_readl(base + SA1111_WAKEEN0);
843 save->wakeen1 = sa1111_readl(base + SA1111_WAKEEN1);
848 val = sa1111_readl(sachip->base + SA1111_SKCR);
849 sa1111_writel(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
850 sa1111_writel(0, sachip->base + SA1111_SKPWM0);
851 sa1111_writel(0, sachip->base + SA1111_SKPWM1);
853 clk_disable(sachip->clk);
855 spin_unlock_irqrestore(&sachip->lock, flags);
861 * sa1111_resume - Restore the SA1111 device state.
862 * @dev: device to restore
864 * Restore the general state of the SA1111; clock control and
865 * interrupt controller. Other parts of the SA1111 must be
866 * restored by their respective drivers, and must be called
867 * via LDM after this function.
869 static int sa1111_resume(struct platform_device *dev)
871 struct sa1111 *sachip = platform_get_drvdata(dev);
872 struct sa1111_save_data *save;
873 unsigned long flags, id;
876 save = (struct sa1111_save_data *)dev->dev.power.saved_state;
880 spin_lock_irqsave(&sachip->lock, flags);
883 * Ensure that the SA1111 is still here.
884 * FIXME: shouldn't do this here.
886 id = sa1111_readl(sachip->base + SA1111_SKID);
887 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
888 __sa1111_remove(sachip);
889 platform_set_drvdata(dev, NULL);
895 * First of all, wake up the chip.
898 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
899 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
902 sa1111_writel(save->skcr, base + SA1111_SKCR);
903 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
904 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
905 sa1111_writel(save->skaud, base + SA1111_SKAUD);
906 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
907 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
909 base = sachip->base + SA1111_INTC;
910 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
911 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
912 sa1111_writel(save->inten0, base + SA1111_INTEN0);
913 sa1111_writel(save->inten1, base + SA1111_INTEN1);
914 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
915 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
916 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
917 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
919 spin_unlock_irqrestore(&sachip->lock, flags);
921 dev->dev.power.saved_state = NULL;
928 #define sa1111_suspend NULL
929 #define sa1111_resume NULL
932 static int sa1111_probe(struct platform_device *pdev)
934 struct resource *mem;
937 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
940 irq = platform_get_irq(pdev, 0);
944 return __sa1111_probe(&pdev->dev, mem, irq);
947 static int sa1111_remove(struct platform_device *pdev)
949 struct sa1111 *sachip = platform_get_drvdata(pdev);
952 __sa1111_remove(sachip);
953 platform_set_drvdata(pdev, NULL);
956 kfree(pdev->dev.power.saved_state);
957 pdev->dev.power.saved_state = NULL;
965 * Not sure if this should be on the system bus or not yet.
966 * We really want some way to register a system device at
967 * the per-machine level, and then have this driver pick
968 * up the registered devices.
970 * We also need to handle the SDRAM configuration for
971 * PXA250/SA1110 machine classes.
973 static struct platform_driver sa1111_device_driver = {
974 .probe = sa1111_probe,
975 .remove = sa1111_remove,
976 .suspend = sa1111_suspend,
977 .resume = sa1111_resume,
984 * Get the parent device driver (us) structure
985 * from a child function device
987 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
989 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
993 * The bits in the opdiv field are non-linear.
995 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
997 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
999 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1001 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
1003 fbdiv = (skcdr & 0x007f) + 2;
1004 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1005 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1007 return 3686400 * fbdiv / (ipdiv * opdiv);
1011 * sa1111_pll_clock - return the current PLL clock frequency.
1012 * @sadev: SA1111 function block
1014 * BUG: we should look at SKCR. We also blindly believe that
1015 * the chip is being fed with the 3.6864MHz clock.
1017 * Returns the PLL clock in Hz.
1019 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1021 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1023 return __sa1111_pll_clock(sachip);
1027 * sa1111_select_audio_mode - select I2S or AC link mode
1028 * @sadev: SA1111 function block
1029 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1031 * Frob the SKCR to select AC Link mode or I2S mode for
1034 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1036 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1037 unsigned long flags;
1040 spin_lock_irqsave(&sachip->lock, flags);
1042 val = sa1111_readl(sachip->base + SA1111_SKCR);
1043 if (mode == SA1111_AUDIO_I2S) {
1048 sa1111_writel(val, sachip->base + SA1111_SKCR);
1050 spin_unlock_irqrestore(&sachip->lock, flags);
1054 * sa1111_set_audio_rate - set the audio sample rate
1055 * @sadev: SA1111 SAC function block
1056 * @rate: sample rate to select
1058 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1060 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1063 if (sadev->devid != SA1111_DEVID_SAC)
1066 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1072 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1078 * sa1111_get_audio_rate - get the audio sample rate
1079 * @sadev: SA1111 SAC function block device
1081 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1083 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1086 if (sadev->devid != SA1111_DEVID_SAC)
1089 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1091 return __sa1111_pll_clock(sachip) / (256 * div);
1094 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1095 unsigned int bits, unsigned int dir,
1096 unsigned int sleep_dir)
1098 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1099 unsigned long flags;
1101 void __iomem *gpio = sachip->base + SA1111_GPIO;
1103 #define MODIFY_BITS(port, mask, dir) \
1105 val = sa1111_readl(port); \
1107 val |= (dir) & (mask); \
1108 sa1111_writel(val, port); \
1111 spin_lock_irqsave(&sachip->lock, flags);
1112 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1113 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1114 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1116 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1117 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1118 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1119 spin_unlock_irqrestore(&sachip->lock, flags);
1122 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1124 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1125 unsigned long flags;
1127 void __iomem *gpio = sachip->base + SA1111_GPIO;
1129 spin_lock_irqsave(&sachip->lock, flags);
1130 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1131 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1132 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1133 spin_unlock_irqrestore(&sachip->lock, flags);
1136 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1138 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1139 unsigned long flags;
1141 void __iomem *gpio = sachip->base + SA1111_GPIO;
1143 spin_lock_irqsave(&sachip->lock, flags);
1144 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1145 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1146 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1147 spin_unlock_irqrestore(&sachip->lock, flags);
1151 * Individual device operations.
1155 * sa1111_enable_device - enable an on-chip SA1111 function block
1156 * @sadev: SA1111 function block device to enable
1158 void sa1111_enable_device(struct sa1111_dev *sadev)
1160 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1161 unsigned long flags;
1164 spin_lock_irqsave(&sachip->lock, flags);
1165 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1166 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1167 spin_unlock_irqrestore(&sachip->lock, flags);
1171 * sa1111_disable_device - disable an on-chip SA1111 function block
1172 * @sadev: SA1111 function block device to disable
1174 void sa1111_disable_device(struct sa1111_dev *sadev)
1176 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1177 unsigned long flags;
1180 spin_lock_irqsave(&sachip->lock, flags);
1181 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1182 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1183 spin_unlock_irqrestore(&sachip->lock, flags);
1187 * SA1111 "Register Access Bus."
1189 * We model this as a regular bus type, and hang devices directly
1192 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1194 struct sa1111_dev *dev = SA1111_DEV(_dev);
1195 struct sa1111_driver *drv = SA1111_DRV(_drv);
1197 return dev->devid == drv->devid;
1200 static int sa1111_bus_suspend(struct device *dev, pm_message_t state)
1202 struct sa1111_dev *sadev = SA1111_DEV(dev);
1203 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1206 if (drv && drv->suspend)
1207 ret = drv->suspend(sadev, state);
1211 static int sa1111_bus_resume(struct device *dev)
1213 struct sa1111_dev *sadev = SA1111_DEV(dev);
1214 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1217 if (drv && drv->resume)
1218 ret = drv->resume(sadev);
1222 static int sa1111_bus_probe(struct device *dev)
1224 struct sa1111_dev *sadev = SA1111_DEV(dev);
1225 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1229 ret = drv->probe(sadev);
1233 static int sa1111_bus_remove(struct device *dev)
1235 struct sa1111_dev *sadev = SA1111_DEV(dev);
1236 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1240 ret = drv->remove(sadev);
1244 struct bus_type sa1111_bus_type = {
1245 .name = "sa1111-rab",
1246 .match = sa1111_match,
1247 .probe = sa1111_bus_probe,
1248 .remove = sa1111_bus_remove,
1249 .suspend = sa1111_bus_suspend,
1250 .resume = sa1111_bus_resume,
1253 int sa1111_driver_register(struct sa1111_driver *driver)
1255 driver->drv.bus = &sa1111_bus_type;
1256 return driver_register(&driver->drv);
1259 void sa1111_driver_unregister(struct sa1111_driver *driver)
1261 driver_unregister(&driver->drv);
1264 static int __init sa1111_init(void)
1266 int ret = bus_register(&sa1111_bus_type);
1268 platform_driver_register(&sa1111_device_driver);
1272 static void __exit sa1111_exit(void)
1274 platform_driver_unregister(&sa1111_device_driver);
1275 bus_unregister(&sa1111_bus_type);
1278 subsys_initcall(sa1111_init);
1279 module_exit(sa1111_exit);
1281 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1282 MODULE_LICENSE("GPL");
1284 EXPORT_SYMBOL(sa1111_select_audio_mode);
1285 EXPORT_SYMBOL(sa1111_set_audio_rate);
1286 EXPORT_SYMBOL(sa1111_get_audio_rate);
1287 EXPORT_SYMBOL(sa1111_set_io_dir);
1288 EXPORT_SYMBOL(sa1111_set_io);
1289 EXPORT_SYMBOL(sa1111_set_sleep_io);
1290 EXPORT_SYMBOL(sa1111_enable_device);
1291 EXPORT_SYMBOL(sa1111_disable_device);
1292 EXPORT_SYMBOL(sa1111_pll_clock);
1293 EXPORT_SYMBOL(sa1111_bus_type);
1294 EXPORT_SYMBOL(sa1111_driver_register);
1295 EXPORT_SYMBOL(sa1111_driver_unregister);