drivers/pcmcia/sa1111_generic.c

Source file repositories/reference/linux-study-clean/drivers/pcmcia/sa1111_generic.c

File Facts

System
Linux kernel
Corpus path
drivers/pcmcia/sa1111_generic.c
Extension
.c
Size
6682 bytes
Lines
272
Domain
Driver Families
Bucket
drivers/pcmcia
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (s->soc.nr) {
			s->soc.socket.pci_irq = irqs[IDX_IRQ_S1_READY_NINT];
			s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S1_CD_VALID];
			s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
			s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S1_BVD1_STSCHG];
			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
		} else {
			s->soc.socket.pci_irq = irqs[IDX_IRQ_S0_READY_NINT];
			s->soc.stat[SOC_STAT_CD].irq = irqs[IDX_IRQ_S0_CD_VALID];
			s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
			s->soc.stat[SOC_STAT_BVD1].irq = irqs[IDX_IRQ_S0_BVD1_STSCHG];
			s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
		}

		ret = add(&s->soc);
		if (ret == 0) {
			s->next = dev_get_drvdata(&dev->dev);
			dev_set_drvdata(&dev->dev, s);
		} else
			kfree(s);
	}

	return ret;
}

static int pcmcia_probe(struct sa1111_dev *dev)
{
	void __iomem *base;
	int ret;

	ret = sa1111_enable_device(dev);
	if (ret)
		return ret;

	dev_set_drvdata(&dev->dev, NULL);

	if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
		sa1111_disable_device(dev);
		return -EBUSY;
	}

	base = dev->mapbase;

	/*
	 * Initialise the suspend state.
	 */
	writel_relaxed(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
	writel_relaxed(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);

	ret = -ENODEV;
#ifdef CONFIG_SA1100_JORNADA720
	if (machine_is_jornada720())
		ret = pcmcia_jornada720_init(dev);
#endif
#ifdef CONFIG_ASSABET_NEPONSET
	if (machine_is_assabet())
		ret = pcmcia_neponset_init(dev);
#endif

	if (ret) {
		release_mem_region(dev->res.start, 512);
		sa1111_disable_device(dev);
	}

	return ret;
}

static void pcmcia_remove(struct sa1111_dev *dev)
{
	struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);

	dev_set_drvdata(&dev->dev, NULL);

	for (; s; s = next) {
		next = s->next;
		soc_pcmcia_remove_one(&s->soc);
		kfree(s);
	}

	release_mem_region(dev->res.start, 512);
	sa1111_disable_device(dev);
}

static struct sa1111_driver pcmcia_driver = {
	.drv = {
		.name	= "sa1111-pcmcia",
	},
	.devid		= SA1111_DEVID_PCMCIA,
	.probe		= pcmcia_probe,
	.remove		= pcmcia_remove,

Annotation

Implementation Notes