drivers/net/wireless/ath/ath10k/bmi.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/ath10k/bmi.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/ath10k/bmi.c
Extension
.c
Size
12438 bytes
Lines
521
Domain
Driver Families
Bucket
drivers/net
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 (ret) {
			ath10k_warn(ar, "unable to read from device\n");
			return ret;
		}
	}

	ver_len = __le32_to_cpu(tmp);

	/* Step 2: Check the target info length */
	if (ver_len != sizeof(resp.get_target_info)) {
		ath10k_warn(ar, "Unexpected target info len: %u. Expected: %zu\n",
			    ver_len, sizeof(resp.get_target_info));
		return -EINVAL;
	}

	/* Step 3: Read the rest of the version response */
	resplen = sizeof(resp.get_target_info) - sizeof(u32);
	ret = ath10k_hif_exchange_bmi_msg(ar, NULL, 0,
					  &resp.get_target_info.version,
					  &resplen);
	if (ret) {
		ath10k_warn(ar, "unable to read from device\n");
		return ret;
	}

	target_info->version = __le32_to_cpu(resp.get_target_info.version);
	target_info->type    = __le32_to_cpu(resp.get_target_info.type);

	return 0;
}

int ath10k_bmi_read_memory(struct ath10k *ar,
			   u32 address, void *buffer, u32 length)
{
	struct bmi_cmd cmd;
	union bmi_resp resp;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.read_mem);
	u32 rxlen;
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi read address 0x%x length %d\n",
		   address, length);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "command disallowed\n");
		return -EBUSY;
	}

	while (length) {
		rxlen = min_t(u32, length, BMI_MAX_DATA_SIZE);

		cmd.id            = __cpu_to_le32(BMI_READ_MEMORY);
		cmd.read_mem.addr = __cpu_to_le32(address);
		cmd.read_mem.len  = __cpu_to_le32(rxlen);

		ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen,
						  &resp, &rxlen);
		if (ret) {
			ath10k_warn(ar, "unable to read from the device (%d)\n",
				    ret);
			return ret;
		}

		memcpy(buffer, resp.read_mem.payload, rxlen);
		address += rxlen;
		buffer  += rxlen;
		length  -= rxlen;
	}

	return 0;
}
EXPORT_SYMBOL(ath10k_bmi_read_memory);

int ath10k_bmi_write_soc_reg(struct ath10k *ar, u32 address, u32 reg_val)
{
	struct bmi_cmd cmd;
	u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.write_soc_reg);
	int ret;

	ath10k_dbg(ar, ATH10K_DBG_BMI,
		   "bmi write soc register 0x%08x val 0x%08x\n",
		   address, reg_val);

	if (ar->bmi.done_sent) {
		ath10k_warn(ar, "bmi write soc register command in progress\n");
		return -EBUSY;
	}

	cmd.id = __cpu_to_le32(BMI_WRITE_SOC_REGISTER);
	cmd.write_soc_reg.addr = __cpu_to_le32(address);

Annotation

Implementation Notes