1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/common/sa1111.c
7 * Original code by John Dorsey
9 * This file contains all generic SA1111 support.
11 * All initialization functions provided here are intended to be called
12 * from machine specific code with proper arguments when required.
14 #include <linux/module.h>
15 #include <linux/gpio/driver.h>
16 #include <linux/init.h>
17 #include <linux/irq.h>
18 #include <linux/kernel.h>
19 #include <linux/delay.h>
20 #include <linux/errno.h>
21 #include <linux/ioport.h>
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
24 #include <linux/spinlock.h>
25 #include <linux/dma-map-ops.h>
26 #include <linux/clk.h>
29 #include <asm/mach/irq.h>
30 #include <asm/mach-types.h>
31 #include <linux/sizes.h>
33 #include <asm/hardware/sa1111.h>
35 #ifdef CONFIG_ARCH_SA1100
36 #include <mach/hardware.h>
40 #define IRQ_GPAIN0 (0)
41 #define IRQ_GPAIN1 (1)
42 #define IRQ_GPAIN2 (2)
43 #define IRQ_GPAIN3 (3)
44 #define IRQ_GPBIN0 (4)
45 #define IRQ_GPBIN1 (5)
46 #define IRQ_GPBIN2 (6)
47 #define IRQ_GPBIN3 (7)
48 #define IRQ_GPBIN4 (8)
49 #define IRQ_GPBIN5 (9)
50 #define IRQ_GPCIN0 (10)
51 #define IRQ_GPCIN1 (11)
52 #define IRQ_GPCIN2 (12)
53 #define IRQ_GPCIN3 (13)
54 #define IRQ_GPCIN4 (14)
55 #define IRQ_GPCIN5 (15)
56 #define IRQ_GPCIN6 (16)
57 #define IRQ_GPCIN7 (17)
58 #define IRQ_MSTXINT (18)
59 #define IRQ_MSRXINT (19)
60 #define IRQ_MSSTOPERRINT (20)
61 #define IRQ_TPTXINT (21)
62 #define IRQ_TPRXINT (22)
63 #define IRQ_TPSTOPERRINT (23)
64 #define SSPXMTINT (24)
65 #define SSPRCVINT (25)
67 #define AUDXMTDMADONEA (32)
68 #define AUDRCVDMADONEA (33)
69 #define AUDXMTDMADONEB (34)
70 #define AUDRCVDMADONEB (35)
78 #define IRQ_USBPWR (43)
80 #define IRQ_HCIBUFFACC (45)
81 #define IRQ_HCIRMTWKP (46)
82 #define IRQ_NHCIMFCIR (47)
83 #define IRQ_USB_PORT_RESUME (48)
84 #define IRQ_S0_READY_NINT (49)
85 #define IRQ_S1_READY_NINT (50)
86 #define IRQ_S0_CD_VALID (51)
87 #define IRQ_S1_CD_VALID (52)
88 #define IRQ_S0_BVD1_STSCHG (53)
89 #define IRQ_S1_BVD1_STSCHG (54)
90 #define SA1111_IRQ_NR (55)
92 extern void sa1110_mb_enable(void);
93 extern void sa1110_mb_disable(void);
96 * We keep the following data for the overall SA1111. Note that the
97 * struct device and struct resource are "fake"; they should be supplied
98 * by the bus above us. However, in the interests of getting all SA1111
99 * drivers converted over to the device model, we provide this as an
100 * anchor point for all the other drivers.
107 int irq_base; /* base for cascaded on-chip IRQs */
110 struct sa1111_platform_data *pdata;
111 struct irq_domain *irqdomain;
119 * We _really_ need to eliminate this. Its only users
120 * are the PWM and DMA checking code.
122 static struct sa1111 *g_sa1111;
124 struct sa1111_dev_info {
125 unsigned long offset;
126 unsigned long skpcr_mask;
129 unsigned int hwirq[6];
132 static struct sa1111_dev_info sa1111_devices[] = {
134 .offset = SA1111_USB,
135 .skpcr_mask = SKPCR_UCLKEN,
137 .devid = SA1111_DEVID_USB,
149 .skpcr_mask = SKPCR_I2SCLKEN | SKPCR_L3CLKEN,
151 .devid = SA1111_DEVID_SAC,
161 .skpcr_mask = SKPCR_SCLKEN,
162 .devid = SA1111_DEVID_SSP,
165 .offset = SA1111_KBD,
166 .skpcr_mask = SKPCR_PTCLKEN,
167 .devid = SA1111_DEVID_PS2_KBD,
174 .offset = SA1111_MSE,
175 .skpcr_mask = SKPCR_PMCLKEN,
176 .devid = SA1111_DEVID_PS2_MSE,
185 .devid = SA1111_DEVID_PCMCIA,
197 static int sa1111_map_irq(struct sa1111 *sachip, irq_hw_number_t hwirq)
199 return irq_create_mapping(sachip->irqdomain, hwirq);
203 * SA1111 interrupt support. Since clearing an IRQ while there are
204 * active IRQs causes the interrupt output to pulse, the upper levels
205 * will call us again if there are more interrupts to process.
207 static void sa1111_irq_handler(struct irq_desc *desc)
209 unsigned int stat0, stat1, i;
210 struct sa1111 *sachip = irq_desc_get_handler_data(desc);
211 struct irq_domain *irqdomain;
212 void __iomem *mapbase = sachip->base + SA1111_INTC;
214 stat0 = readl_relaxed(mapbase + SA1111_INTSTATCLR0);
215 stat1 = readl_relaxed(mapbase + SA1111_INTSTATCLR1);
217 writel_relaxed(stat0, mapbase + SA1111_INTSTATCLR0);
219 desc->irq_data.chip->irq_ack(&desc->irq_data);
221 writel_relaxed(stat1, mapbase + SA1111_INTSTATCLR1);
223 if (stat0 == 0 && stat1 == 0) {
228 irqdomain = sachip->irqdomain;
230 for (i = 0; stat0; i++, stat0 >>= 1)
232 generic_handle_domain_irq(irqdomain, i);
234 for (i = 32; stat1; i++, stat1 >>= 1)
236 generic_handle_domain_irq(irqdomain, i);
238 /* For level-based interrupts */
239 desc->irq_data.chip->irq_unmask(&desc->irq_data);
242 static u32 sa1111_irqmask(struct irq_data *d)
244 return BIT(irqd_to_hwirq(d) & 31);
247 static int sa1111_irqbank(struct irq_data *d)
249 return (irqd_to_hwirq(d) / 32) * 4;
252 static void sa1111_ack_irq(struct irq_data *d)
256 static void sa1111_mask_irq(struct irq_data *d)
258 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
259 void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
262 ie = readl_relaxed(mapbase + SA1111_INTEN0);
263 ie &= ~sa1111_irqmask(d);
264 writel(ie, mapbase + SA1111_INTEN0);
267 static void sa1111_unmask_irq(struct irq_data *d)
269 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
270 void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
273 ie = readl_relaxed(mapbase + SA1111_INTEN0);
274 ie |= sa1111_irqmask(d);
275 writel_relaxed(ie, mapbase + SA1111_INTEN0);
279 * Attempt to re-trigger the interrupt. The SA1111 contains a register
280 * (INTSET) which claims to do this. However, in practice no amount of
281 * manipulation of INTEN and INTSET guarantees that the interrupt will
282 * be triggered. In fact, its very difficult, if not impossible to get
283 * INTSET to re-trigger the interrupt.
285 static int sa1111_retrigger_irq(struct irq_data *d)
287 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
288 void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
289 u32 ip, mask = sa1111_irqmask(d);
292 ip = readl_relaxed(mapbase + SA1111_INTPOL0);
293 for (i = 0; i < 8; i++) {
294 writel_relaxed(ip ^ mask, mapbase + SA1111_INTPOL0);
295 writel_relaxed(ip, mapbase + SA1111_INTPOL0);
296 if (readl_relaxed(mapbase + SA1111_INTSTATCLR0) & mask)
301 pr_err("Danger Will Robinson: failed to re-trigger IRQ%d\n",
309 static int sa1111_type_irq(struct irq_data *d, unsigned int flags)
311 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
312 void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
313 u32 ip, mask = sa1111_irqmask(d);
315 if (flags == IRQ_TYPE_PROBE)
318 if ((!(flags & IRQ_TYPE_EDGE_RISING) ^ !(flags & IRQ_TYPE_EDGE_FALLING)) == 0)
321 ip = readl_relaxed(mapbase + SA1111_INTPOL0);
322 if (flags & IRQ_TYPE_EDGE_RISING)
326 writel_relaxed(ip, mapbase + SA1111_INTPOL0);
327 writel_relaxed(ip, mapbase + SA1111_WAKEPOL0);
332 static int sa1111_wake_irq(struct irq_data *d, unsigned int on)
334 struct sa1111 *sachip = irq_data_get_irq_chip_data(d);
335 void __iomem *mapbase = sachip->base + SA1111_INTC + sa1111_irqbank(d);
336 u32 we, mask = sa1111_irqmask(d);
338 we = readl_relaxed(mapbase + SA1111_WAKEEN0);
343 writel_relaxed(we, mapbase + SA1111_WAKEEN0);
348 static struct irq_chip sa1111_irq_chip = {
350 .irq_ack = sa1111_ack_irq,
351 .irq_mask = sa1111_mask_irq,
352 .irq_unmask = sa1111_unmask_irq,
353 .irq_retrigger = sa1111_retrigger_irq,
354 .irq_set_type = sa1111_type_irq,
355 .irq_set_wake = sa1111_wake_irq,
358 static int sa1111_irqdomain_map(struct irq_domain *d, unsigned int irq,
359 irq_hw_number_t hwirq)
361 struct sa1111 *sachip = d->host_data;
363 /* Disallow unavailable interrupts */
364 if (hwirq > SSPROR && hwirq < AUDXMTDMADONEA)
367 irq_set_chip_data(irq, sachip);
368 irq_set_chip_and_handler(irq, &sa1111_irq_chip, handle_edge_irq);
369 irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
374 static const struct irq_domain_ops sa1111_irqdomain_ops = {
375 .map = sa1111_irqdomain_map,
376 .xlate = irq_domain_xlate_twocell,
379 static int sa1111_setup_irq(struct sa1111 *sachip, unsigned irq_base)
381 void __iomem *irqbase = sachip->base + SA1111_INTC;
385 * We're guaranteed that this region hasn't been taken.
387 request_mem_region(sachip->phys + SA1111_INTC, 512, "irq");
389 ret = irq_alloc_descs(-1, irq_base, SA1111_IRQ_NR, -1);
391 dev_err(sachip->dev, "unable to allocate %u irqs: %d\n",
398 sachip->irq_base = ret;
400 /* disable all IRQs */
401 writel_relaxed(0, irqbase + SA1111_INTEN0);
402 writel_relaxed(0, irqbase + SA1111_INTEN1);
403 writel_relaxed(0, irqbase + SA1111_WAKEEN0);
404 writel_relaxed(0, irqbase + SA1111_WAKEEN1);
407 * detect on rising edge. Note: Feb 2001 Errata for SA1111
408 * specifies that S0ReadyInt and S1ReadyInt should be '1'.
410 writel_relaxed(0, irqbase + SA1111_INTPOL0);
411 writel_relaxed(BIT(IRQ_S0_READY_NINT & 31) |
412 BIT(IRQ_S1_READY_NINT & 31),
413 irqbase + SA1111_INTPOL1);
416 writel_relaxed(~0, irqbase + SA1111_INTSTATCLR0);
417 writel_relaxed(~0, irqbase + SA1111_INTSTATCLR1);
419 sachip->irqdomain = irq_domain_add_linear(NULL, SA1111_IRQ_NR,
420 &sa1111_irqdomain_ops,
422 if (!sachip->irqdomain) {
423 irq_free_descs(sachip->irq_base, SA1111_IRQ_NR);
427 irq_domain_associate_many(sachip->irqdomain,
428 sachip->irq_base + IRQ_GPAIN0,
429 IRQ_GPAIN0, SSPROR + 1 - IRQ_GPAIN0);
430 irq_domain_associate_many(sachip->irqdomain,
431 sachip->irq_base + AUDXMTDMADONEA,
433 IRQ_S1_BVD1_STSCHG + 1 - AUDXMTDMADONEA);
436 * Register SA1111 interrupt
438 irq_set_irq_type(sachip->irq, IRQ_TYPE_EDGE_RISING);
439 irq_set_chained_handler_and_data(sachip->irq, sa1111_irq_handler,
442 dev_info(sachip->dev, "Providing IRQ%u-%u\n",
443 sachip->irq_base, sachip->irq_base + SA1111_IRQ_NR - 1);
448 static void sa1111_remove_irq(struct sa1111 *sachip)
450 struct irq_domain *domain = sachip->irqdomain;
451 void __iomem *irqbase = sachip->base + SA1111_INTC;
454 /* disable all IRQs */
455 writel_relaxed(0, irqbase + SA1111_INTEN0);
456 writel_relaxed(0, irqbase + SA1111_INTEN1);
457 writel_relaxed(0, irqbase + SA1111_WAKEEN0);
458 writel_relaxed(0, irqbase + SA1111_WAKEEN1);
460 irq_set_chained_handler_and_data(sachip->irq, NULL, NULL);
461 for (i = 0; i < SA1111_IRQ_NR; i++)
462 irq_dispose_mapping(irq_find_mapping(domain, i));
463 irq_domain_remove(domain);
465 release_mem_region(sachip->phys + SA1111_INTC, 512);
469 SA1111_GPIO_PXDDR = (SA1111_GPIO_PADDR - SA1111_GPIO_PADDR),
470 SA1111_GPIO_PXDRR = (SA1111_GPIO_PADRR - SA1111_GPIO_PADDR),
471 SA1111_GPIO_PXDWR = (SA1111_GPIO_PADWR - SA1111_GPIO_PADDR),
472 SA1111_GPIO_PXSDR = (SA1111_GPIO_PASDR - SA1111_GPIO_PADDR),
473 SA1111_GPIO_PXSSR = (SA1111_GPIO_PASSR - SA1111_GPIO_PADDR),
476 static struct sa1111 *gc_to_sa1111(struct gpio_chip *gc)
478 return container_of(gc, struct sa1111, gc);
481 static void __iomem *sa1111_gpio_map_reg(struct sa1111 *sachip, unsigned offset)
483 void __iomem *reg = sachip->base + SA1111_GPIO;
486 return reg + SA1111_GPIO_PADDR;
488 return reg + SA1111_GPIO_PBDDR;
490 return reg + SA1111_GPIO_PCDDR;
494 static u32 sa1111_gpio_map_bit(unsigned offset)
499 return BIT(offset - 4);
501 return BIT(offset - 10);
505 static void sa1111_gpio_modify(void __iomem *reg, u32 mask, u32 set)
509 val = readl_relaxed(reg);
512 writel_relaxed(val, reg);
515 static int sa1111_gpio_get_direction(struct gpio_chip *gc, unsigned offset)
517 struct sa1111 *sachip = gc_to_sa1111(gc);
518 void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
519 u32 mask = sa1111_gpio_map_bit(offset);
521 return !!(readl_relaxed(reg + SA1111_GPIO_PXDDR) & mask);
524 static int sa1111_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
526 struct sa1111 *sachip = gc_to_sa1111(gc);
528 void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
529 u32 mask = sa1111_gpio_map_bit(offset);
531 spin_lock_irqsave(&sachip->lock, flags);
532 sa1111_gpio_modify(reg + SA1111_GPIO_PXDDR, mask, mask);
533 sa1111_gpio_modify(reg + SA1111_GPIO_PXSDR, mask, mask);
534 spin_unlock_irqrestore(&sachip->lock, flags);
539 static int sa1111_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
542 struct sa1111 *sachip = gc_to_sa1111(gc);
544 void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
545 u32 mask = sa1111_gpio_map_bit(offset);
547 spin_lock_irqsave(&sachip->lock, flags);
548 sa1111_gpio_modify(reg + SA1111_GPIO_PXDWR, mask, value ? mask : 0);
549 sa1111_gpio_modify(reg + SA1111_GPIO_PXSSR, mask, value ? mask : 0);
550 sa1111_gpio_modify(reg + SA1111_GPIO_PXDDR, mask, 0);
551 sa1111_gpio_modify(reg + SA1111_GPIO_PXSDR, mask, 0);
552 spin_unlock_irqrestore(&sachip->lock, flags);
557 static int sa1111_gpio_get(struct gpio_chip *gc, unsigned offset)
559 struct sa1111 *sachip = gc_to_sa1111(gc);
560 void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
561 u32 mask = sa1111_gpio_map_bit(offset);
563 return !!(readl_relaxed(reg + SA1111_GPIO_PXDRR) & mask);
566 static void sa1111_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
568 struct sa1111 *sachip = gc_to_sa1111(gc);
570 void __iomem *reg = sa1111_gpio_map_reg(sachip, offset);
571 u32 mask = sa1111_gpio_map_bit(offset);
573 spin_lock_irqsave(&sachip->lock, flags);
574 sa1111_gpio_modify(reg + SA1111_GPIO_PXDWR, mask, value ? mask : 0);
575 sa1111_gpio_modify(reg + SA1111_GPIO_PXSSR, mask, value ? mask : 0);
576 spin_unlock_irqrestore(&sachip->lock, flags);
579 static void sa1111_gpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
582 struct sa1111 *sachip = gc_to_sa1111(gc);
584 void __iomem *reg = sachip->base + SA1111_GPIO;
590 spin_lock_irqsave(&sachip->lock, flags);
591 sa1111_gpio_modify(reg + SA1111_GPIO_PADWR, msk & 15, val);
592 sa1111_gpio_modify(reg + SA1111_GPIO_PASSR, msk & 15, val);
593 sa1111_gpio_modify(reg + SA1111_GPIO_PBDWR, (msk >> 4) & 255, val >> 4);
594 sa1111_gpio_modify(reg + SA1111_GPIO_PBSSR, (msk >> 4) & 255, val >> 4);
595 sa1111_gpio_modify(reg + SA1111_GPIO_PCDWR, (msk >> 12) & 255, val >> 12);
596 sa1111_gpio_modify(reg + SA1111_GPIO_PCSSR, (msk >> 12) & 255, val >> 12);
597 spin_unlock_irqrestore(&sachip->lock, flags);
600 static int sa1111_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
602 struct sa1111 *sachip = gc_to_sa1111(gc);
604 return sa1111_map_irq(sachip, offset);
607 static int sa1111_setup_gpios(struct sa1111 *sachip)
609 sachip->gc.label = "sa1111";
610 sachip->gc.parent = sachip->dev;
611 sachip->gc.owner = THIS_MODULE;
612 sachip->gc.get_direction = sa1111_gpio_get_direction;
613 sachip->gc.direction_input = sa1111_gpio_direction_input;
614 sachip->gc.direction_output = sa1111_gpio_direction_output;
615 sachip->gc.get = sa1111_gpio_get;
616 sachip->gc.set = sa1111_gpio_set;
617 sachip->gc.set_multiple = sa1111_gpio_set_multiple;
618 sachip->gc.to_irq = sa1111_gpio_to_irq;
619 sachip->gc.base = -1;
620 sachip->gc.ngpio = 18;
622 return devm_gpiochip_add_data(sachip->dev, &sachip->gc, sachip);
626 * Bring the SA1111 out of reset. This requires a set procedure:
627 * 1. nRESET asserted (by hardware)
628 * 2. CLK turned on from SA1110
629 * 3. nRESET deasserted
630 * 4. VCO turned on, PLL_BYPASS turned off
631 * 5. Wait lock time, then assert RCLKEn
632 * 7. PCR set to allow clocking of individual functions
634 * Until we've done this, the only registers we can access are:
639 static void sa1111_wake(struct sa1111 *sachip)
641 unsigned long flags, r;
643 spin_lock_irqsave(&sachip->lock, flags);
645 clk_enable(sachip->clk);
648 * Turn VCO on, and disable PLL Bypass.
650 r = readl_relaxed(sachip->base + SA1111_SKCR);
652 writel_relaxed(r, sachip->base + SA1111_SKCR);
653 r |= SKCR_PLL_BYPASS | SKCR_OE_EN;
654 writel_relaxed(r, sachip->base + SA1111_SKCR);
657 * Wait lock time. SA1111 manual _doesn't_
658 * specify a figure for this! We choose 100us.
663 * Enable RCLK. We also ensure that RDYEN is set.
665 r |= SKCR_RCLKEN | SKCR_RDYEN;
666 writel_relaxed(r, sachip->base + SA1111_SKCR);
669 * Wait 14 RCLK cycles for the chip to finish coming out
670 * of reset. (RCLK=24MHz). This is 590ns.
675 * Ensure all clocks are initially off.
677 writel_relaxed(0, sachip->base + SA1111_SKPCR);
679 spin_unlock_irqrestore(&sachip->lock, flags);
682 #ifdef CONFIG_ARCH_SA1100
684 static u32 sa1111_dma_mask[] = {
696 * Configure the SA1111 shared memory controller.
699 sa1111_configure_smc(struct sa1111 *sachip, int sdram, unsigned int drac,
700 unsigned int cas_latency)
702 unsigned int smcr = SMCR_DTIM | SMCR_MBGE | FInsrt(drac, SMCR_DRAC);
704 if (cas_latency == 3)
707 writel_relaxed(smcr, sachip->base + SA1111_SMCR);
710 * Now clear the bits in the DMA mask to work around the SA1111
711 * DMA erratum (Intel StrongARM SA-1111 Microprocessor Companion
712 * Chip Specification Update, June 2000, Erratum #7).
714 if (sachip->dev->dma_mask)
715 *sachip->dev->dma_mask &= sa1111_dma_mask[drac >> 2];
717 sachip->dev->coherent_dma_mask &= sa1111_dma_mask[drac >> 2];
721 static void sa1111_dev_release(struct device *_dev)
723 struct sa1111_dev *dev = to_sa1111_device(_dev);
729 sa1111_init_one_child(struct sa1111 *sachip, struct resource *parent,
730 struct sa1111_dev_info *info)
732 struct sa1111_dev *dev;
736 dev = kzalloc(sizeof(struct sa1111_dev), GFP_KERNEL);
742 device_initialize(&dev->dev);
743 dev_set_name(&dev->dev, "%4.4lx", info->offset);
744 dev->devid = info->devid;
745 dev->dev.parent = sachip->dev;
746 dev->dev.bus = &sa1111_bus_type;
747 dev->dev.release = sa1111_dev_release;
748 dev->res.start = sachip->phys + info->offset;
749 dev->res.end = dev->res.start + 511;
750 dev->res.name = dev_name(&dev->dev);
751 dev->res.flags = IORESOURCE_MEM;
752 dev->mapbase = sachip->base + info->offset;
753 dev->skpcr_mask = info->skpcr_mask;
755 for (i = 0; i < ARRAY_SIZE(info->hwirq); i++)
756 dev->hwirq[i] = info->hwirq[i];
759 * If the parent device has a DMA mask associated with it, and
760 * this child supports DMA, propagate it down to the children.
762 if (info->dma && sachip->dev->dma_mask) {
763 dev->dma_mask = *sachip->dev->dma_mask;
764 dev->dev.dma_mask = &dev->dma_mask;
765 dev->dev.coherent_dma_mask = sachip->dev->coherent_dma_mask;
768 ret = request_resource(parent, &dev->res);
770 dev_err(sachip->dev, "failed to allocate resource for %s\n",
775 ret = device_add(&dev->dev);
781 release_resource(&dev->res);
783 put_device(&dev->dev);
789 * sa1111_probe - probe for a single SA1111 chip.
790 * @phys_addr: physical address of device.
792 * Probe for a SA1111 chip. This must be called
793 * before any other SA1111-specific code.
796 * %-ENODEV device not found.
797 * %-EBUSY physical address already marked in-use.
798 * %-EINVAL no platform data passed
801 static int __sa1111_probe(struct device *me, struct resource *mem, int irq)
803 struct sa1111_platform_data *pd = me->platform_data;
804 struct sa1111 *sachip;
806 unsigned int has_devs;
807 int i, ret = -ENODEV;
812 sachip = devm_kzalloc(me, sizeof(struct sa1111), GFP_KERNEL);
816 sachip->clk = devm_clk_get(me, "SA1111_CLK");
817 if (IS_ERR(sachip->clk))
818 return PTR_ERR(sachip->clk);
820 ret = clk_prepare(sachip->clk);
824 spin_lock_init(&sachip->lock);
827 dev_set_drvdata(sachip->dev, sachip);
830 sachip->phys = mem->start;
834 * Map the whole region. This also maps the
835 * registers for our children.
837 sachip->base = ioremap(mem->start, PAGE_SIZE * 2);
844 * Probe for the chip. Only touch the SBI registers.
846 id = readl_relaxed(sachip->base + SA1111_SKID);
847 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
848 printk(KERN_DEBUG "SA1111 not detected: ID = %08lx\n", id);
853 pr_info("SA1111 Microprocessor Companion Chip: silicon revision %lx, metal revision %lx\n",
854 (id & SKID_SIREV_MASK) >> 4, id & SKID_MTREV_MASK);
857 * We found it. Wake the chip up, and initialise.
862 * The interrupt controller must be initialised before any
863 * other device to ensure that the interrupts are available.
865 ret = sa1111_setup_irq(sachip, pd->irq_base);
869 /* Setup the GPIOs - should really be done after the IRQ setup */
870 ret = sa1111_setup_gpios(sachip);
874 #ifdef CONFIG_ARCH_SA1100
879 * The SDRAM configuration of the SA1110 and the SA1111 must
880 * match. This is very important to ensure that SA1111 accesses
881 * don't corrupt the SDRAM. Note that this ungates the SA1111's
882 * MBGNT signal, so we must have called sa1110_mb_disable()
885 sa1111_configure_smc(sachip, 1,
886 FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
887 FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
890 * We only need to turn on DCLK whenever we want to use the
891 * DMA. It can otherwise be held firmly in the off position.
892 * (currently, we always enable it.)
894 val = readl_relaxed(sachip->base + SA1111_SKPCR);
895 writel_relaxed(val | SKPCR_DCLKEN, sachip->base + SA1111_SKPCR);
898 * Enable the SA1110 memory bus request and grant signals.
908 has_devs &= ~pd->disable_devs;
910 for (i = 0; i < ARRAY_SIZE(sa1111_devices); i++)
911 if (sa1111_devices[i].devid & has_devs)
912 sa1111_init_one_child(sachip, mem, &sa1111_devices[i]);
917 sa1111_remove_irq(sachip);
919 clk_disable(sachip->clk);
921 iounmap(sachip->base);
923 clk_unprepare(sachip->clk);
927 static int sa1111_remove_one(struct device *dev, void *data)
929 struct sa1111_dev *sadev = to_sa1111_device(dev);
930 if (dev->bus != &sa1111_bus_type)
932 device_del(&sadev->dev);
933 release_resource(&sadev->res);
934 put_device(&sadev->dev);
938 static void __sa1111_remove(struct sa1111 *sachip)
940 device_for_each_child(sachip->dev, NULL, sa1111_remove_one);
942 sa1111_remove_irq(sachip);
944 clk_disable(sachip->clk);
945 clk_unprepare(sachip->clk);
947 iounmap(sachip->base);
950 struct sa1111_save_data {
955 unsigned char skpwm0;
956 unsigned char skpwm1;
959 * Interrupt controller
961 unsigned int intpol0;
962 unsigned int intpol1;
965 unsigned int wakepol0;
966 unsigned int wakepol1;
967 unsigned int wakeen0;
968 unsigned int wakeen1;
973 static int sa1111_suspend_noirq(struct device *dev)
975 struct sa1111 *sachip = dev_get_drvdata(dev);
976 struct sa1111_save_data *save;
981 save = kmalloc(sizeof(struct sa1111_save_data), GFP_KERNEL);
984 sachip->saved_state = save;
986 spin_lock_irqsave(&sachip->lock, flags);
992 save->skcr = readl_relaxed(base + SA1111_SKCR);
993 save->skpcr = readl_relaxed(base + SA1111_SKPCR);
994 save->skcdr = readl_relaxed(base + SA1111_SKCDR);
995 save->skaud = readl_relaxed(base + SA1111_SKAUD);
996 save->skpwm0 = readl_relaxed(base + SA1111_SKPWM0);
997 save->skpwm1 = readl_relaxed(base + SA1111_SKPWM1);
999 writel_relaxed(0, sachip->base + SA1111_SKPWM0);
1000 writel_relaxed(0, sachip->base + SA1111_SKPWM1);
1002 base = sachip->base + SA1111_INTC;
1003 save->intpol0 = readl_relaxed(base + SA1111_INTPOL0);
1004 save->intpol1 = readl_relaxed(base + SA1111_INTPOL1);
1005 save->inten0 = readl_relaxed(base + SA1111_INTEN0);
1006 save->inten1 = readl_relaxed(base + SA1111_INTEN1);
1007 save->wakepol0 = readl_relaxed(base + SA1111_WAKEPOL0);
1008 save->wakepol1 = readl_relaxed(base + SA1111_WAKEPOL1);
1009 save->wakeen0 = readl_relaxed(base + SA1111_WAKEEN0);
1010 save->wakeen1 = readl_relaxed(base + SA1111_WAKEEN1);
1015 val = readl_relaxed(sachip->base + SA1111_SKCR);
1016 writel_relaxed(val | SKCR_SLEEP, sachip->base + SA1111_SKCR);
1018 clk_disable(sachip->clk);
1020 spin_unlock_irqrestore(&sachip->lock, flags);
1022 #ifdef CONFIG_ARCH_SA1100
1023 sa1110_mb_disable();
1030 * sa1111_resume - Restore the SA1111 device state.
1031 * @dev: device to restore
1033 * Restore the general state of the SA1111; clock control and
1034 * interrupt controller. Other parts of the SA1111 must be
1035 * restored by their respective drivers, and must be called
1036 * via LDM after this function.
1038 static int sa1111_resume_noirq(struct device *dev)
1040 struct sa1111 *sachip = dev_get_drvdata(dev);
1041 struct sa1111_save_data *save;
1042 unsigned long flags, id;
1045 save = sachip->saved_state;
1050 * Ensure that the SA1111 is still here.
1051 * FIXME: shouldn't do this here.
1053 id = readl_relaxed(sachip->base + SA1111_SKID);
1054 if ((id & SKID_ID_MASK) != SKID_SA1111_ID) {
1055 __sa1111_remove(sachip);
1056 dev_set_drvdata(dev, NULL);
1062 * First of all, wake up the chip.
1064 sa1111_wake(sachip);
1066 #ifdef CONFIG_ARCH_SA1100
1067 /* Enable the memory bus request/grant signals */
1072 * Only lock for write ops. Also, sa1111_wake must be called with
1073 * released spinlock!
1075 spin_lock_irqsave(&sachip->lock, flags);
1077 writel_relaxed(0, sachip->base + SA1111_INTC + SA1111_INTEN0);
1078 writel_relaxed(0, sachip->base + SA1111_INTC + SA1111_INTEN1);
1080 base = sachip->base;
1081 writel_relaxed(save->skcr, base + SA1111_SKCR);
1082 writel_relaxed(save->skpcr, base + SA1111_SKPCR);
1083 writel_relaxed(save->skcdr, base + SA1111_SKCDR);
1084 writel_relaxed(save->skaud, base + SA1111_SKAUD);
1085 writel_relaxed(save->skpwm0, base + SA1111_SKPWM0);
1086 writel_relaxed(save->skpwm1, base + SA1111_SKPWM1);
1088 base = sachip->base + SA1111_INTC;
1089 writel_relaxed(save->intpol0, base + SA1111_INTPOL0);
1090 writel_relaxed(save->intpol1, base + SA1111_INTPOL1);
1091 writel_relaxed(save->inten0, base + SA1111_INTEN0);
1092 writel_relaxed(save->inten1, base + SA1111_INTEN1);
1093 writel_relaxed(save->wakepol0, base + SA1111_WAKEPOL0);
1094 writel_relaxed(save->wakepol1, base + SA1111_WAKEPOL1);
1095 writel_relaxed(save->wakeen0, base + SA1111_WAKEEN0);
1096 writel_relaxed(save->wakeen1, base + SA1111_WAKEEN1);
1098 spin_unlock_irqrestore(&sachip->lock, flags);
1100 sachip->saved_state = NULL;
1107 #define sa1111_suspend_noirq NULL
1108 #define sa1111_resume_noirq NULL
1111 static int sa1111_probe(struct platform_device *pdev)
1113 struct resource *mem;
1116 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1119 irq = platform_get_irq(pdev, 0);
1123 return __sa1111_probe(&pdev->dev, mem, irq);
1126 static void sa1111_remove(struct platform_device *pdev)
1128 struct sa1111 *sachip = platform_get_drvdata(pdev);
1132 kfree(sachip->saved_state);
1133 sachip->saved_state = NULL;
1135 __sa1111_remove(sachip);
1136 platform_set_drvdata(pdev, NULL);
1140 static struct dev_pm_ops sa1111_pm_ops = {
1141 .suspend_noirq = sa1111_suspend_noirq,
1142 .resume_noirq = sa1111_resume_noirq,
1146 * Not sure if this should be on the system bus or not yet.
1147 * We really want some way to register a system device at
1148 * the per-machine level, and then have this driver pick
1149 * up the registered devices.
1151 * We also need to handle the SDRAM configuration for
1152 * PXA250/SA1110 machine classes.
1154 static struct platform_driver sa1111_device_driver = {
1155 .probe = sa1111_probe,
1156 .remove_new = sa1111_remove,
1159 .pm = &sa1111_pm_ops,
1164 * Get the parent device driver (us) structure
1165 * from a child function device
1167 static inline struct sa1111 *sa1111_chip_driver(struct sa1111_dev *sadev)
1169 return (struct sa1111 *)dev_get_drvdata(sadev->dev.parent);
1173 * The bits in the opdiv field are non-linear.
1175 static unsigned char opdiv_table[] = { 1, 4, 2, 8 };
1177 static unsigned int __sa1111_pll_clock(struct sa1111 *sachip)
1179 unsigned int skcdr, fbdiv, ipdiv, opdiv;
1181 skcdr = readl_relaxed(sachip->base + SA1111_SKCDR);
1183 fbdiv = (skcdr & 0x007f) + 2;
1184 ipdiv = ((skcdr & 0x0f80) >> 7) + 2;
1185 opdiv = opdiv_table[(skcdr & 0x3000) >> 12];
1187 return 3686400 * fbdiv / (ipdiv * opdiv);
1191 * sa1111_pll_clock - return the current PLL clock frequency.
1192 * @sadev: SA1111 function block
1194 * BUG: we should look at SKCR. We also blindly believe that
1195 * the chip is being fed with the 3.6864MHz clock.
1197 * Returns the PLL clock in Hz.
1199 unsigned int sa1111_pll_clock(struct sa1111_dev *sadev)
1201 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1203 return __sa1111_pll_clock(sachip);
1205 EXPORT_SYMBOL(sa1111_pll_clock);
1208 * sa1111_select_audio_mode - select I2S or AC link mode
1209 * @sadev: SA1111 function block
1210 * @mode: One of %SA1111_AUDIO_ACLINK or %SA1111_AUDIO_I2S
1212 * Frob the SKCR to select AC Link mode or I2S mode for
1215 void sa1111_select_audio_mode(struct sa1111_dev *sadev, int mode)
1217 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1218 unsigned long flags;
1221 spin_lock_irqsave(&sachip->lock, flags);
1223 val = readl_relaxed(sachip->base + SA1111_SKCR);
1224 if (mode == SA1111_AUDIO_I2S) {
1229 writel_relaxed(val, sachip->base + SA1111_SKCR);
1231 spin_unlock_irqrestore(&sachip->lock, flags);
1233 EXPORT_SYMBOL(sa1111_select_audio_mode);
1236 * sa1111_set_audio_rate - set the audio sample rate
1237 * @sadev: SA1111 SAC function block
1238 * @rate: sample rate to select
1240 int sa1111_set_audio_rate(struct sa1111_dev *sadev, int rate)
1242 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1245 if (sadev->devid != SA1111_DEVID_SAC)
1248 div = (__sa1111_pll_clock(sachip) / 256 + rate / 2) / rate;
1254 writel_relaxed(div - 1, sachip->base + SA1111_SKAUD);
1258 EXPORT_SYMBOL(sa1111_set_audio_rate);
1261 * sa1111_get_audio_rate - get the audio sample rate
1262 * @sadev: SA1111 SAC function block device
1264 int sa1111_get_audio_rate(struct sa1111_dev *sadev)
1266 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1269 if (sadev->devid != SA1111_DEVID_SAC)
1272 div = readl_relaxed(sachip->base + SA1111_SKAUD) + 1;
1274 return __sa1111_pll_clock(sachip) / (256 * div);
1276 EXPORT_SYMBOL(sa1111_get_audio_rate);
1279 * Individual device operations.
1283 * sa1111_enable_device - enable an on-chip SA1111 function block
1284 * @sadev: SA1111 function block device to enable
1286 int sa1111_enable_device(struct sa1111_dev *sadev)
1288 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1289 unsigned long flags;
1293 if (sachip->pdata && sachip->pdata->enable)
1294 ret = sachip->pdata->enable(sachip->pdata->data, sadev->devid);
1297 spin_lock_irqsave(&sachip->lock, flags);
1298 val = readl_relaxed(sachip->base + SA1111_SKPCR);
1299 writel_relaxed(val | sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1300 spin_unlock_irqrestore(&sachip->lock, flags);
1304 EXPORT_SYMBOL(sa1111_enable_device);
1307 * sa1111_disable_device - disable an on-chip SA1111 function block
1308 * @sadev: SA1111 function block device to disable
1310 void sa1111_disable_device(struct sa1111_dev *sadev)
1312 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1313 unsigned long flags;
1316 spin_lock_irqsave(&sachip->lock, flags);
1317 val = readl_relaxed(sachip->base + SA1111_SKPCR);
1318 writel_relaxed(val & ~sadev->skpcr_mask, sachip->base + SA1111_SKPCR);
1319 spin_unlock_irqrestore(&sachip->lock, flags);
1321 if (sachip->pdata && sachip->pdata->disable)
1322 sachip->pdata->disable(sachip->pdata->data, sadev->devid);
1324 EXPORT_SYMBOL(sa1111_disable_device);
1326 int sa1111_get_irq(struct sa1111_dev *sadev, unsigned num)
1328 struct sa1111 *sachip = sa1111_chip_driver(sadev);
1329 if (num >= ARRAY_SIZE(sadev->hwirq))
1331 return sa1111_map_irq(sachip, sadev->hwirq[num]);
1333 EXPORT_SYMBOL_GPL(sa1111_get_irq);
1336 * SA1111 "Register Access Bus."
1338 * We model this as a regular bus type, and hang devices directly
1341 static int sa1111_match(struct device *_dev, struct device_driver *_drv)
1343 struct sa1111_dev *dev = to_sa1111_device(_dev);
1344 struct sa1111_driver *drv = SA1111_DRV(_drv);
1346 return !!(dev->devid & drv->devid);
1349 static int sa1111_bus_probe(struct device *dev)
1351 struct sa1111_dev *sadev = to_sa1111_device(dev);
1352 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1356 ret = drv->probe(sadev);
1360 static void sa1111_bus_remove(struct device *dev)
1362 struct sa1111_dev *sadev = to_sa1111_device(dev);
1363 struct sa1111_driver *drv = SA1111_DRV(dev->driver);
1369 struct bus_type sa1111_bus_type = {
1370 .name = "sa1111-rab",
1371 .match = sa1111_match,
1372 .probe = sa1111_bus_probe,
1373 .remove = sa1111_bus_remove,
1375 EXPORT_SYMBOL(sa1111_bus_type);
1377 int sa1111_driver_register(struct sa1111_driver *driver)
1379 driver->drv.bus = &sa1111_bus_type;
1380 return driver_register(&driver->drv);
1382 EXPORT_SYMBOL(sa1111_driver_register);
1384 void sa1111_driver_unregister(struct sa1111_driver *driver)
1386 driver_unregister(&driver->drv);
1388 EXPORT_SYMBOL(sa1111_driver_unregister);
1390 static int __init sa1111_init(void)
1392 int ret = bus_register(&sa1111_bus_type);
1394 platform_driver_register(&sa1111_device_driver);
1398 static void __exit sa1111_exit(void)
1400 platform_driver_unregister(&sa1111_device_driver);
1401 bus_unregister(&sa1111_bus_type);
1404 subsys_initcall(sa1111_init);
1405 module_exit(sa1111_exit);
1407 MODULE_DESCRIPTION("Intel Corporation SA1111 core driver");
1408 MODULE_LICENSE("GPL");