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/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>
36 #include <asm/hardware/sa1111.h>
38 extern void __init sa1110_mb_enable(void);
41 * We keep the following data for the overall SA1111. Note that the
42 * struct device and struct resource are "fake"; they should be supplied
43 * by the bus above us. However, in the interests of getting all SA1111
44 * drivers converted over to the device model, we provide this as an
45 * anchor point for all the other drivers.
56 * We _really_ need to eliminate this. Its only users
57 * are the PWM and DMA checking code.
59 static struct sa1111 *g_sa1111;
61 struct sa1111_dev_info {
63 unsigned long skpcr_mask;
68 static struct sa1111_dev_info sa1111_devices[] = {
71 .skpcr_mask = SKPCR_UCLKEN,
72 .devid = SA1111_DEVID_USB,
84 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
85 .devid = SA1111_DEVID_SAC,
95 .skpcr_mask = SKPCR_SCLKEN,
96 .devid = SA1111_DEVID_SSP,
100 .skpcr_mask = SKPCR_PTCLKEN,
101 .devid = SA1111_DEVID_PS2,
108 .offset = SA1111_MSE,
109 .skpcr_mask = SKPCR_PMCLKEN,
110 .devid = SA1111_DEVID_PS2,
119 .devid = SA1111_DEVID_PCMCIA,
132 * SA1111 interrupt support. Since clearing an IRQ while there are
133 * active IRQs causes the interrupt output to pulse, the upper levels
134 * will call us again if there are more interrupts to process.
137 sa1111_irq_handler(unsigned int irq, struct irqdesc *desc, struct pt_regs *regs)
139 unsigned int stat0, stat1, i;
141 stat0 = sa1111_readl(desc->data + SA1111_INTSTATCLR0);
142 stat1 = sa1111_readl(desc->data + SA1111_INTSTATCLR1);
144 sa1111_writel(stat0, desc->data + SA1111_INTSTATCLR0);
146 desc->chip->ack(irq);
148 sa1111_writel(stat1, desc->data + SA1111_INTSTATCLR1);
150 if (stat0 == 0 && stat1 == 0) {
151 do_bad_IRQ(irq, desc, regs);
155 for (i = IRQ_SA1111_START; stat0; i++, stat0 >>= 1)
157 do_edge_IRQ(i, irq_desc + i, regs);
159 for (i = IRQ_SA1111_START + 32; stat1; i++, stat1 >>= 1)
161 do_edge_IRQ(i, irq_desc + i, regs);
163 /* For level-based interrupts */
164 desc->chip->unmask(irq);
167 #define SA1111_IRQMASK_LO(x) (1 << (x - IRQ_SA1111_START))
168 #define SA1111_IRQMASK_HI(x) (1 << (x - IRQ_SA1111_START - 32))
170 static void sa1111_ack_irq(unsigned int irq)
174 static void sa1111_mask_lowirq(unsigned int irq)
176 void *mapbase = get_irq_chipdata(irq);
179 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
180 ie0 &= ~SA1111_IRQMASK_LO(irq);
181 writel(ie0, mapbase + SA1111_INTEN0);
184 static void sa1111_unmask_lowirq(unsigned int irq)
186 void *mapbase = get_irq_chipdata(irq);
189 ie0 = sa1111_readl(mapbase + SA1111_INTEN0);
190 ie0 |= SA1111_IRQMASK_LO(irq);
191 sa1111_writel(ie0, mapbase + SA1111_INTEN0);
195 * Attempt to re-trigger the interrupt. The SA1111 contains a register
196 * (INTSET) which claims to do this. However, in practice no amount of
197 * manipulation of INTEN and INTSET guarantees that the interrupt will
198 * be triggered. In fact, its very difficult, if not impossible to get
199 * INTSET to re-trigger the interrupt.
201 static int sa1111_retrigger_lowirq(unsigned int irq)
203 unsigned int mask = SA1111_IRQMASK_LO(irq);
204 void *mapbase = get_irq_chipdata(irq);
208 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
209 for (i = 0; i < 8; i++) {
210 sa1111_writel(ip0 ^ mask, mapbase + SA1111_INTPOL0);
211 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
212 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
217 printk(KERN_ERR "Danger Will Robinson: failed to "
218 "re-trigger IRQ%d\n", irq);
219 return i == 8 ? -1 : 0;
222 static int sa1111_type_lowirq(unsigned int irq, unsigned int flags)
224 unsigned int mask = SA1111_IRQMASK_LO(irq);
225 void *mapbase = get_irq_chipdata(irq);
228 if (flags == IRQT_PROBE)
231 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
234 ip0 = sa1111_readl(mapbase + SA1111_INTPOL0);
235 if (flags & __IRQT_RISEDGE)
239 sa1111_writel(ip0, mapbase + SA1111_INTPOL0);
240 sa1111_writel(ip0, mapbase + SA1111_WAKEPOL0);
245 static int sa1111_wake_lowirq(unsigned int irq, unsigned int on)
247 unsigned int mask = SA1111_IRQMASK_LO(irq);
248 void *mapbase = get_irq_chipdata(irq);
251 we0 = sa1111_readl(mapbase + SA1111_WAKEEN0);
256 sa1111_writel(we0, mapbase + SA1111_WAKEEN0);
261 static struct irqchip sa1111_low_chip = {
262 .ack = sa1111_ack_irq,
263 .mask = sa1111_mask_lowirq,
264 .unmask = sa1111_unmask_lowirq,
265 .retrigger = sa1111_retrigger_lowirq,
266 .type = sa1111_type_lowirq,
267 .wake = sa1111_wake_lowirq,
270 static void sa1111_mask_highirq(unsigned int irq)
272 void *mapbase = get_irq_chipdata(irq);
275 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
276 ie1 &= ~SA1111_IRQMASK_HI(irq);
277 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
280 static void sa1111_unmask_highirq(unsigned int irq)
282 void *mapbase = get_irq_chipdata(irq);
285 ie1 = sa1111_readl(mapbase + SA1111_INTEN1);
286 ie1 |= SA1111_IRQMASK_HI(irq);
287 sa1111_writel(ie1, mapbase + SA1111_INTEN1);
291 * Attempt to re-trigger the interrupt. The SA1111 contains a register
292 * (INTSET) which claims to do this. However, in practice no amount of
293 * manipulation of INTEN and INTSET guarantees that the interrupt will
294 * be triggered. In fact, its very difficult, if not impossible to get
295 * INTSET to re-trigger the interrupt.
297 static int sa1111_retrigger_highirq(unsigned int irq)
299 unsigned int mask = SA1111_IRQMASK_HI(irq);
300 void *mapbase = get_irq_chipdata(irq);
304 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
305 for (i = 0; i < 8; i++) {
306 sa1111_writel(ip1 ^ mask, mapbase + SA1111_INTPOL1);
307 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
308 if (sa1111_readl(mapbase + SA1111_INTSTATCLR1) & mask)
313 printk(KERN_ERR "Danger Will Robinson: failed to "
314 "re-trigger IRQ%d\n", irq);
315 return i == 8 ? -1 : 0;
318 static int sa1111_type_highirq(unsigned int irq, unsigned int flags)
320 unsigned int mask = SA1111_IRQMASK_HI(irq);
321 void *mapbase = get_irq_chipdata(irq);
324 if (flags == IRQT_PROBE)
327 if ((!(flags & __IRQT_RISEDGE) ^ !(flags & __IRQT_FALEDGE)) == 0)
330 ip1 = sa1111_readl(mapbase + SA1111_INTPOL1);
331 if (flags & __IRQT_RISEDGE)
335 sa1111_writel(ip1, mapbase + SA1111_INTPOL1);
336 sa1111_writel(ip1, mapbase + SA1111_WAKEPOL1);
341 static int sa1111_wake_highirq(unsigned int irq, unsigned int on)
343 unsigned int mask = SA1111_IRQMASK_HI(irq);
344 void *mapbase = get_irq_chipdata(irq);
347 we1 = sa1111_readl(mapbase + SA1111_WAKEEN1);
352 sa1111_writel(we1, mapbase + SA1111_WAKEEN1);
357 static struct irqchip sa1111_high_chip = {
358 .ack = sa1111_ack_irq,
359 .mask = sa1111_mask_highirq,
360 .unmask = sa1111_unmask_highirq,
361 .retrigger = sa1111_retrigger_highirq,
362 .type = sa1111_type_highirq,
363 .wake = sa1111_wake_highirq,
366 static void sa1111_setup_irq(struct sa1111 *sachip)
368 void *irqbase = sachip->base + SA1111_INTC;
372 * We're guaranteed that this region hasn't been taken.
374 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
376 /* disable all IRQs */
377 sa1111_writel(0, irqbase + SA1111_INTEN0);
378 sa1111_writel(0, irqbase + SA1111_INTEN1);
379 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
380 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
383 * detect on rising edge. Note: Feb 2001 Errata for SA1111
384 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
386 sa1111_writel(0, irqbase + SA1111_INTPOL0);
387 sa1111_writel(SA1111_IRQMASK_HI(IRQ_S0_READY_NINT) |
388 SA1111_IRQMASK_HI(IRQ_S1_READY_NINT),
389 irqbase + SA1111_INTPOL1);
392 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR0);
393 sa1111_writel(~0, irqbase + SA1111_INTSTATCLR1);
395 for (irq = IRQ_GPAIN0; irq <= SSPROR; irq++) {
396 set_irq_chip(irq, &sa1111_low_chip);
397 set_irq_chipdata(irq, irqbase);
398 set_irq_handler(irq, do_edge_IRQ);
399 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
402 for (irq = AUDXMTDMADONEA; irq <= IRQ_S1_BVD1_STSCHG; irq++) {
403 set_irq_chip(irq, &sa1111_high_chip);
404 set_irq_chipdata(irq, irqbase);
405 set_irq_handler(irq, do_edge_IRQ);
406 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
410 * Register SA1111 interrupt
412 set_irq_type(sachip->irq, IRQT_RISING);
413 set_irq_data(sachip->irq, irqbase);
414 set_irq_chained_handler(sachip->irq, sa1111_irq_handler);
418 * Bring the SA1111 out of reset. This requires a set procedure:
419 * 1. nRESET asserted (by hardware)
420 * 2. CLK turned on from SA1110
421 * 3. nRESET deasserted
422 * 4. VCO turned on, PLL_BYPASS turned off
423 * 5. Wait lock time, then assert RCLKEn
424 * 7. PCR set to allow clocking of individual functions
426 * Until we've done this, the only registers we can access are:
431 static void sa1111_wake(struct sa1111 *sachip)
433 unsigned long flags, r;
435 spin_lock_irqsave(&sachip->lock, flags);
437 #ifdef CONFIG_ARCH_SA1100
439 * First, set up the 3.6864MHz clock on GPIO 27 for the SA-1111:
440 * (SA-1110 Developer's Manual, section 9.1.2.1)
442 GAFR |= GPIO_32_768kHz;
443 GPDR |= GPIO_32_768kHz;
444 TUCR = TUCR_3_6864MHz;
445 #elif CONFIG_ARCH_PXA
446 pxa_gpio_mode(GPIO11_3_6MHz_MD);
448 #error missing clock setup
452 * Turn VCO on, and disable PLL Bypass.
454 r = sa1111_readl(sachip->base + SA1111_SKCR);
456 sa1111_writel(r, sachip->base + SA1111_SKCR);
457 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
458 sa1111_writel(r, sachip->base + SA1111_SKCR);
461 * Wait lock time. SA1111 manual _doesn't_
462 * specify a figure for this! We choose 100us.
467 * Enable RCLK. We also ensure that RDYEN is set.
469 r |= SKCR_RCLKEN | SKCR_RDYEN;
470 sa1111_writel(r, sachip->base + SA1111_SKCR);
473 * Wait 14 RCLK cycles for the chip to finish coming out
474 * of reset. (RCLK=24MHz). This is 590ns.
479 * Ensure all clocks are initially off.
481 sa1111_writel(0, sachip->base + SA1111_SKPCR);
483 spin_unlock_irqrestore(&sachip->lock, flags);
486 #ifdef CONFIG_ARCH_SA1100
488 static u32 sa1111_dma_mask[] = {
500 * Configure the SA1111 shared memory controller.
503 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
504 unsigned int cas_latency)
506 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
508 if (cas_latency == 3)
511 sa1111_writel(smcr, sachip->base + SA1111_SMCR);
514 * Now clear the bits in the DMA mask to work around the SA1111
515 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
516 * Chip Specification Update, June 2000, Erratum #7).
518 if (sachip->dev->dma_mask)
519 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
521 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
526 static void sa1111_dev_release(struct device *_dev)
528 struct sa1111_dev *dev = SA1111_DEV(_dev);
530 release_resource(&dev->res);
535 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
536 struct sa1111_dev_info *info)
538 struct sa1111_dev *dev;
541 dev = kmalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
546 memset(dev, 0, sizeof(struct sa1111_dev));
548 snprintf(dev->dev.bus_id, sizeof(dev->dev.bus_id),
549 "%4.4lx", info->offset);
551 dev->devid = info->devid;
552 dev->dev.parent = sachip->dev;
553 dev->dev.bus = &sa1111_bus_type;
554 dev->dev.release = sa1111_dev_release;
555 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
556 dev->res.start = sachip->phys + info->offset;
557 dev->res.end = dev->res.start + 511;
558 dev->res.name = dev->dev.bus_id;
559 dev->res.flags = IORESOURCE_MEM;
560 dev->mapbase = sachip->base + info->offset;
561 dev->skpcr_mask = info->skpcr_mask;
562 memmove(dev->irq, info->irq, sizeof(dev->irq));
564 ret = request_resource(parent, &dev->res);
566 printk("SA1111: failed to allocate resource for %s\n",
573 ret = device_register(&dev->dev);
575 release_resource(&dev->res);
581 * If the parent device has a DMA mask associated with it,
582 * propagate it down to the children.
584 if (sachip->dev->dma_mask) {
585 dev->dma_mask = *sachip->dev->dma_mask;
586 dev->dev.dma_mask = &dev->dma_mask;
588 if (dev->dma_mask != 0xffffffffUL) {
589 ret = dmabounce_register_dev(&dev->dev, 1024, 4096);
591 printk("SA1111: Failed to register %s with dmabounce", dev->dev.bus_id);
592 device_unregister(&dev->dev);
602 * sa1111_probe - probe for a single SA1111 chip.
603 * @phys_addr: physical address of device.
605 * Probe for a SA1111 chip. This must be called
606 * before any other SA1111-specific code.
609 * %-ENODEV device not found.
610 * %-EBUSY physical address already marked in-use.
614 __sa1111_probe(struct device *me, struct resource *mem, int irq)
616 struct sa1111 *sachip;
618 unsigned int has_devs, val;
619 int i, ret = -ENODEV;
621 sachip = kmalloc(sizeof(struct sa1111), GFP_KERNEL);
625 memset(sachip, 0, sizeof(struct sa1111));
627 spin_lock_init(&sachip->lock);
630 dev_set_drvdata(sachip->dev, sachip);
632 sachip->phys = mem->start;
636 * Map the whole region. This also maps the
637 * registers for our children.
639 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
646 * Probe for the chip. Only touch the SBI registers.
648 id = sa1111_readl(sachip->base + SA1111_SKID);
649 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
650 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
655 printk(KERN_INFO "SA1111 Microprocessor Companion Chip: "
656 "silicon revision %lx, metal revision %lx\n",
657 (id & SKID_SIREV_MASK)>>4, (id & SKID_MTREV_MASK));
660 * We found it. Wake the chip up, and initialise.
664 #ifdef CONFIG_ARCH_SA1100
666 * The SDRAM configuration of the SA1110 and the SA1111 must
667 * match. This is very important to ensure that SA1111 accesses
668 * don't corrupt the SDRAM. Note that this ungates the SA1111's
669 * MBGNT signal, so we must have called sa1110_mb_disable()
672 sa1111_configure_smc(sachip, 1,
673 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
674 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
677 * We only need to turn on DCLK whenever we want to use the
678 * DMA. It can otherwise be held firmly in the off position.
679 * (currently, we always enable it.)
681 val = sa1111_readl(sachip->base + SA1111_SKPCR);
682 sa1111_writel(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
685 * Enable the SA1110 memory bus request and grant signals.
691 * The interrupt controller must be initialised before any
692 * other device to ensure that the interrupts are available.
694 if (sachip->irq != NO_IRQ)
695 sa1111_setup_irq(sachip);
700 if (machine_is_assabet() || machine_is_jornada720() ||
702 has_devs &= ~(1 << 4);
704 has_devs &= ~(1 << 1);
706 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
707 if (has_devs & (1 << i))
708 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
713 iounmap(sachip->base);
719 static void __sa1111_remove(struct sa1111 *sachip)
721 struct list_head *l, *n;
722 void *irqbase = sachip->base + SA1111_INTC;
724 list_for_each_safe(l, n, &sachip->dev->children) {
725 struct device *d = list_to_dev(l);
727 device_unregister(d);
730 /* disable all IRQs */
731 sa1111_writel(0, irqbase + SA1111_INTEN0);
732 sa1111_writel(0, irqbase + SA1111_INTEN1);
733 sa1111_writel(0, irqbase + SA1111_WAKEEN0);
734 sa1111_writel(0, irqbase + SA1111_WAKEEN1);
736 if (sachip->irq != NO_IRQ) {
737 set_irq_chained_handler(sachip->irq, NULL);
738 set_irq_data(sachip->irq, NULL);
740 release_mem_region(sachip->phys + SA1111_INTC, 512);
743 iounmap(sachip->base);
748 * According to the "Intel StrongARM SA-1111 Microprocessor Companion
749 * Chip Specification Update" (June 2000), erratum #7, there is a
750 * significant bug in the SA1111 SDRAM shared memory controller. If
751 * an access to a region of memory above 1MB relative to the bank base,
752 * it is important that address bit 10 _NOT_ be asserted. Depending
753 * on the configuration of the RAM, bit 10 may correspond to one
754 * of several different (processor-relative) address bits.
756 * This routine only identifies whether or not a given DMA address
757 * is susceptible to the bug.
759 * This should only get called for sa1111_device types due to the
760 * way we configure our device dma_masks.
762 int dma_needs_bounce(struct device *dev, dma_addr_t addr, size_t size)
764 unsigned int physaddr = SA1111_DMA_ADDR((unsigned int)addr);
765 u32 dma_mask = *dev->dma_mask;
768 * Section 4.6 of the "Intel StrongARM SA-1111 Development Module
769 * User's Guide" mentions that jumpers R51 and R52 control the
770 * target of SA-1111 DMA (either SDRAM bank 0 on Assabet, or
771 * SDRAM bank 1 on Neponset). The default configuration selects
772 * Assabet, so any address in bank 1 is necessarily invalid.
774 if ((machine_is_assabet() || machine_is_pfs168()) &&
775 (addr >= 0xc8000000 || (addr + size) >= 0xc8000000))
779 * Check to see if either the start or end are illegal.
781 return ((addr & ~dma_mask)) || ((addr + size - 1) & ~dma_mask);
784 struct sa1111_save_data {
789 unsigned char skpwm0;
790 unsigned char skpwm1;
793 * Interrupt controller
795 unsigned int intpol0;
796 unsigned int intpol1;
799 unsigned int wakepol0;
800 unsigned int wakepol1;
801 unsigned int wakeen0;
802 unsigned int wakeen1;
805 static int sa1111_suspend(struct device *dev, u32 state, u32 level)
807 struct sa1111 *sachip = dev_get_drvdata(dev);
808 struct sa1111_save_data *save;
813 if (level != SUSPEND_DISABLE)
816 dev->saved_state = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
817 if (!dev->saved_state)
820 save = (struct sa1111_save_data *)dev->saved_state;
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 spin_unlock_irqrestore(&sachip->lock, flags);
859 * sa1111_resume - Restore the SA1111 device state.
860 * @dev: device to restore
861 * @level: resume level
863 * Restore the general state of the SA1111; clock control and
864 * interrupt controller. Other parts of the SA1111 must be
865 * restored by their respective drivers, and must be called
866 * via LDM after this function.
868 static int sa1111_resume(struct device *dev, u32 level)
870 struct sa1111 *sachip = dev_get_drvdata(dev);
871 struct sa1111_save_data *save;
872 unsigned long flags, id;
875 if (level != RESUME_ENABLE)
878 save = (struct sa1111_save_data *)dev->saved_state;
882 spin_lock_irqsave(&sachip->lock, flags);
885 * Ensure that the SA1111 is still here.
886 * FIXME: shouldn't do this here.
888 id = sa1111_readl(sachip->base + SA1111_SKID);
889 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
890 __sa1111_remove(sachip);
891 dev_set_drvdata(dev, NULL);
897 * First of all, wake up the chip.
900 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
901 sa1111_writel(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
904 sa1111_writel(save->skcr, base + SA1111_SKCR);
905 sa1111_writel(save->skpcr, base + SA1111_SKPCR);
906 sa1111_writel(save->skcdr, base + SA1111_SKCDR);
907 sa1111_writel(save->skaud, base + SA1111_SKAUD);
908 sa1111_writel(save->skpwm0, base + SA1111_SKPWM0);
909 sa1111_writel(save->skpwm1, base + SA1111_SKPWM1);
911 base = sachip->base + SA1111_INTC;
912 sa1111_writel(save->intpol0, base + SA1111_INTPOL0);
913 sa1111_writel(save->intpol1, base + SA1111_INTPOL1);
914 sa1111_writel(save->inten0, base + SA1111_INTEN0);
915 sa1111_writel(save->inten1, base + SA1111_INTEN1);
916 sa1111_writel(save->wakepol0, base + SA1111_WAKEPOL0);
917 sa1111_writel(save->wakepol1, base + SA1111_WAKEPOL1);
918 sa1111_writel(save->wakeen0, base + SA1111_WAKEEN0);
919 sa1111_writel(save->wakeen1, base + SA1111_WAKEEN1);
921 spin_unlock_irqrestore(&sachip->lock, flags);
923 dev->saved_state = NULL;
929 static int sa1111_probe(struct device *dev)
931 struct platform_device *pdev = to_platform_device(dev);
932 struct resource *mem = NULL, *irq = NULL;
935 for (i = 0; i < pdev->num_resources; i++) {
936 if (pdev->resource[i].flags & IORESOURCE_MEM)
937 mem = &pdev->resource[i];
938 if (pdev->resource[i].flags & IORESOURCE_IRQ)
939 irq = &pdev->resource[i];
941 return __sa1111_probe(dev, mem, irq ? irq->start : NO_IRQ);
944 static int sa1111_remove(struct device *dev)
946 struct sa1111 *sachip = dev_get_drvdata(dev);
949 __sa1111_remove(sachip);
950 dev_set_drvdata(dev, NULL);
952 kfree(dev->saved_state);
953 dev->saved_state = NULL;
960 * Not sure if this should be on the system bus or not yet.
961 * We really want some way to register a system device at
962 * the per-machine level, and then have this driver pick
963 * up the registered devices.
965 * We also need to handle the SDRAM configuration for
966 * PXA250/SA1110 machine classes.
968 static struct device_driver sa1111_device_driver = {
970 .bus = &platform_bus_type,
971 .probe = sa1111_probe,
972 .remove = sa1111_remove,
973 .suspend = sa1111_suspend,
974 .resume = sa1111_resume,
978 * Get the parent device driver (us) structure
979 * from a child function device
981 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
983 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
987 * The bits in the opdiv field are non-linear.
989 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
991 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
993 unsigned int skcdr, fbdiv, ipdiv, opdiv;
995 skcdr = sa1111_readl(sachip->base + SA1111_SKCDR);
997 fbdiv = (skcdr & 0x007f) + 2;
998 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
999 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1001 return 3686400 * fbdiv / (ipdiv * opdiv);
1005 * sa1111_pll_clock - return the current PLL clock frequency.
1006 * @sadev: SA1111 function block
1008 * BUG: we should look at SKCR. We also blindly believe that
1009 * the chip is being fed with the 3.6864MHz clock.
1011 * Returns the PLL clock in Hz.
1013 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1015 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1017 return __sa1111_pll_clock(sachip);
1021 * sa1111_select_audio_mode - select I2S or AC link mode
1022 * @sadev: SA1111 function block
1023 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1025 * Frob the SKCR to select AC Link mode or I2S mode for
1028 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1030 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1031 unsigned long flags;
1034 spin_lock_irqsave(&sachip->lock, flags);
1036 val = sa1111_readl(sachip->base + SA1111_SKCR);
1037 if (mode == SA1111_AUDIO_I2S) {
1042 sa1111_writel(val, sachip->base + SA1111_SKCR);
1044 spin_unlock_irqrestore(&sachip->lock, flags);
1048 * sa1111_set_audio_rate - set the audio sample rate
1049 * @sadev: SA1111 SAC function block
1050 * @rate: sample rate to select
1052 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1054 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1057 if (sadev->devid != SA1111_DEVID_SAC)
1060 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1066 sa1111_writel(div - 1, sachip->base + SA1111_SKAUD);
1072 * sa1111_get_audio_rate - get the audio sample rate
1073 * @sadev: SA1111 SAC function block device
1075 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1077 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1080 if (sadev->devid != SA1111_DEVID_SAC)
1083 div = sa1111_readl(sachip->base + SA1111_SKAUD) + 1;
1085 return __sa1111_pll_clock(sachip) / (256 * div);
1088 void sa1111_set_io_dir(struct sa1111_dev *sadev,
1089 unsigned int bits, unsigned int dir,
1090 unsigned int sleep_dir)
1092 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1093 unsigned long flags;
1095 void *gpio = sachip->base + SA1111_GPIO;
1097 #define MODIFY_BITS(port, mask, dir) \
1099 val = sa1111_readl(port); \
1101 val |= (dir) & (mask); \
1102 sa1111_writel(val, port); \
1105 spin_lock_irqsave(&sachip->lock, flags);
1106 MODIFY_BITS(gpio + SA1111_GPIO_PADDR, bits & 15, dir);
1107 MODIFY_BITS(gpio + SA1111_GPIO_PBDDR, (bits >> 8) & 255, dir >> 8);
1108 MODIFY_BITS(gpio + SA1111_GPIO_PCDDR, (bits >> 16) & 255, dir >> 16);
1110 MODIFY_BITS(gpio + SA1111_GPIO_PASDR, bits & 15, sleep_dir);
1111 MODIFY_BITS(gpio + SA1111_GPIO_PBSDR, (bits >> 8) & 255, sleep_dir >> 8);
1112 MODIFY_BITS(gpio + SA1111_GPIO_PCSDR, (bits >> 16) & 255, sleep_dir >> 16);
1113 spin_unlock_irqrestore(&sachip->lock, flags);
1116 void sa1111_set_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1118 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1119 unsigned long flags;
1121 void *gpio = sachip->base + SA1111_GPIO;
1123 spin_lock_irqsave(&sachip->lock, flags);
1124 MODIFY_BITS(gpio + SA1111_GPIO_PADWR, bits & 15, v);
1125 MODIFY_BITS(gpio + SA1111_GPIO_PBDWR, (bits >> 8) & 255, v >> 8);
1126 MODIFY_BITS(gpio + SA1111_GPIO_PCDWR, (bits >> 16) & 255, v >> 16);
1127 spin_unlock_irqrestore(&sachip->lock, flags);
1130 void sa1111_set_sleep_io(struct sa1111_dev *sadev, unsigned int bits, unsigned int v)
1132 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1133 unsigned long flags;
1135 void *gpio = sachip->base + SA1111_GPIO;
1137 spin_lock_irqsave(&sachip->lock, flags);
1138 MODIFY_BITS(gpio + SA1111_GPIO_PASSR, bits & 15, v);
1139 MODIFY_BITS(gpio + SA1111_GPIO_PBSSR, (bits >> 8) & 255, v >> 8);
1140 MODIFY_BITS(gpio + SA1111_GPIO_PCSSR, (bits >> 16) & 255, v >> 16);
1141 spin_unlock_irqrestore(&sachip->lock, flags);
1145 * Individual device operations.
1149 * sa1111_enable_device - enable an on-chip SA1111 function block
1150 * @sadev: SA1111 function block device to enable
1152 void sa1111_enable_device(struct sa1111_dev *sadev)
1154 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1155 unsigned long flags;
1158 spin_lock_irqsave(&sachip->lock, flags);
1159 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1160 sa1111_writel(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1161 spin_unlock_irqrestore(&sachip->lock, flags);
1165 * sa1111_disable_device - disable an on-chip SA1111 function block
1166 * @sadev: SA1111 function block device to disable
1168 void sa1111_disable_device(struct sa1111_dev *sadev)
1170 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1171 unsigned long flags;
1174 spin_lock_irqsave(&sachip->lock, flags);
1175 val = sa1111_readl(sachip->base + SA1111_SKPCR);
1176 sa1111_writel(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1177 spin_unlock_irqrestore(&sachip->lock, flags);
1181 * SA1111 "Register Access Bus."
1183 * We model this as a regular bus type, and hang devices directly
1186 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1188 struct sa1111_dev *dev = SA1111_DEV(_dev);
1189 struct sa1111_driver *drv = SA1111_DRV(_drv);
1191 return dev->devid == drv->devid;
1194 static int sa1111_bus_suspend(struct device *dev, u32 state)
1196 struct sa1111_dev *sadev = SA1111_DEV(dev);
1197 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1200 if (drv && drv->suspend)
1201 ret = drv->suspend(sadev, state);
1205 static int sa1111_bus_resume(struct device *dev)
1207 struct sa1111_dev *sadev = SA1111_DEV(dev);
1208 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1211 if (drv && drv->resume)
1212 ret = drv->resume(sadev);
1216 static int sa1111_bus_probe(struct device *dev)
1218 struct sa1111_dev *sadev = SA1111_DEV(dev);
1219 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1223 ret = drv->probe(sadev);
1227 static int sa1111_bus_remove(struct device *dev)
1229 struct sa1111_dev *sadev = SA1111_DEV(dev);
1230 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1234 ret = drv->remove(sadev);
1238 struct bus_type sa1111_bus_type = {
1239 .name = "sa1111-rab",
1240 .match = sa1111_match,
1241 .suspend = sa1111_bus_suspend,
1242 .resume = sa1111_bus_resume,
1245 int sa1111_driver_register(struct sa1111_driver *driver)
1247 driver->drv.probe = sa1111_bus_probe;
1248 driver->drv.remove = sa1111_bus_remove;
1249 driver->drv.bus = &sa1111_bus_type;
1250 return driver_register(&driver->drv);
1253 void sa1111_driver_unregister(struct sa1111_driver *driver)
1255 driver_unregister(&driver->drv);
1258 static int __init sa1111_init(void)
1260 int ret = bus_register(&sa1111_bus_type);
1262 driver_register(&sa1111_device_driver);
1266 static void __exit sa1111_exit(void)
1268 driver_unregister(&sa1111_device_driver);
1269 bus_unregister(&sa1111_bus_type);
1272 module_init(sa1111_init);
1273 module_exit(sa1111_exit);
1275 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1276 MODULE_LICENSE("GPL");
1278 EXPORT_SYMBOL(sa1111_select_audio_mode);
1279 EXPORT_SYMBOL(sa1111_set_audio_rate);
1280 EXPORT_SYMBOL(sa1111_get_audio_rate);
1281 EXPORT_SYMBOL(sa1111_set_io_dir);
1282 EXPORT_SYMBOL(sa1111_set_io);
1283 EXPORT_SYMBOL(sa1111_set_sleep_io);
1284 EXPORT_SYMBOL(sa1111_enable_device);
1285 EXPORT_SYMBOL(sa1111_disable_device);
1286 EXPORT_SYMBOL(sa1111_pll_clock);
1287 EXPORT_SYMBOL(sa1111_bus_type);
1288 EXPORT_SYMBOL(sa1111_driver_register);
1289 EXPORT_SYMBOL(sa1111_driver_unregister);