drivers/net/wireless/ti/wlcore/sdio.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ti/wlcore/sdio.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ti/wlcore/sdio.c
Extension
.c
Size
11160 bytes
Lines
444
Domain
Driver Families
Bucket
drivers/net
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

struct wl12xx_sdio_glue {
	struct device *dev;
	struct platform_device *core;
};

static const struct sdio_device_id wl1271_devices[] = {
	{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
	{}
};
MODULE_DEVICE_TABLE(sdio, wl1271_devices);

static void wl1271_sdio_set_block_size(struct device *child,
				       unsigned int blksz)
{
	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
	struct sdio_func *func = dev_to_sdio_func(glue->dev);

	sdio_claim_host(func);
	sdio_set_block_size(func, blksz);
	sdio_release_host(func);
}

static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,
					     void *buf, size_t len, bool fixed)
{
	int ret;
	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
	struct sdio_func *func = dev_to_sdio_func(glue->dev);

	sdio_claim_host(func);

	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
		((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
		dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
			addr, ((u8 *)buf)[0]);
	} else {
		if (fixed)
			ret = sdio_readsb(func, buf, addr, len);
		else
			ret = sdio_memcpy_fromio(func, buf, addr, len);

		dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
			addr, len);
	}

	sdio_release_host(func);

	if (ret)
		dev_err_ratelimited(child->parent, "sdio read failed (%d)\n", ret);

	if (unlikely(dump)) {
		printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
		print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
			       DUMP_PREFIX_OFFSET, 16, 1,
			       buf, len, false);
	}

	return ret;
}

static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,
					      void *buf, size_t len, bool fixed)
{
	int ret;
	struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
	struct sdio_func *func = dev_to_sdio_func(glue->dev);

	sdio_claim_host(func);

	if (unlikely(dump)) {
		printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr);
		print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ",
				DUMP_PREFIX_OFFSET, 16, 1,
				buf, len, false);
	}

	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
		sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
		dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
			addr, ((u8 *)buf)[0]);
	} else {
		dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
			addr, len);

		if (fixed)
			ret = sdio_writesb(func, addr, buf, len);
		else
			ret = sdio_memcpy_toio(func, addr, buf, len);
	}

Annotation

Implementation Notes