drivers/pcmcia/pxa2xx_base.c

Source file repositories/reference/linux-study-clean/drivers/pcmcia/pxa2xx_base.c

File Facts

System
Linux kernel
Corpus path
drivers/pcmcia/pxa2xx_base.c
Extension
.c
Size
10040 bytes
Lines
363
Domain
Driver Families
Bucket
drivers/pcmcia
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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 (freqs->new > freqs->old) {
			debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
			       "pre-updating\n",
			       freqs->new / 1000, (freqs->new / 100) % 10,
			       freqs->old / 1000, (freqs->old / 100) % 10);
			pxa2xx_pcmcia_set_timing(skt);
		}
		break;

	case CPUFREQ_POSTCHANGE:
		if (freqs->new < freqs->old) {
			debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
			       "post-updating\n",
			       freqs->new / 1000, (freqs->new / 100) % 10,
			       freqs->old / 1000, (freqs->old / 100) % 10);
			pxa2xx_pcmcia_set_timing(skt);
		}
		break;
	}
	return 0;
}
#endif

void pxa2xx_configure_sockets(struct device *dev, struct pcmcia_low_level *ops)
{
	pxa_smemc_set_pcmcia_socket(1);
}
EXPORT_SYMBOL(pxa2xx_configure_sockets);

static const char *skt_names[] = {
	"PCMCIA socket 0",
	"PCMCIA socket 1",
};

#define SKT_DEV_INFO_SIZE(n) \
	(sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))

int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
{
	skt->res_skt.start = _PCMCIA(skt->nr);
	skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
	skt->res_skt.name = skt_names[skt->nr];
	skt->res_skt.flags = IORESOURCE_MEM;

	skt->res_io.start = _PCMCIAIO(skt->nr);
	skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
	skt->res_io.name = "io";
	skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;

	skt->res_mem.start = _PCMCIAMem(skt->nr);
	skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
	skt->res_mem.name = "memory";
	skt->res_mem.flags = IORESOURCE_MEM;

	skt->res_attr.start = _PCMCIAAttr(skt->nr);
	skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
	skt->res_attr.name = "attribute";
	skt->res_attr.flags = IORESOURCE_MEM;

	return soc_pcmcia_add_one(skt);
}
EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);

void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
{
	/* Provide our PXA2xx specific timing routines. */
	ops->set_timing  = pxa2xx_pcmcia_set_timing;
#ifdef CONFIG_CPU_FREQ
	ops->frequency_change = pxa2xx_pcmcia_frequency_change;
#endif
}
EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);

static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
{
	int i, ret = 0;
	struct pcmcia_low_level *ops;
	struct skt_dev_info *sinfo;
	struct soc_pcmcia_socket *skt;
	struct clk *clk;

	ops = (struct pcmcia_low_level *)dev->dev.platform_data;
	if (!ops) {
		ret = -ENODEV;
		goto err0;
	}

	if (cpu_is_pxa320() && ops->nr > 1) {
		dev_err(&dev->dev, "pxa320 supports only one pcmcia slot");
		ret = -EINVAL;

Annotation

Implementation Notes