drivers/net/wireless/ath/ath6kl/usb.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/ath/ath6kl/usb.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/ath/ath6kl/usb.c
Extension
.c
Size
31927 bytes
Lines
1253
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 ath6kl_usb_pipe {
	struct list_head urb_list_head;
	struct usb_anchor urb_submitted;
	u32 urb_alloc;
	u32 urb_cnt;
	u32 urb_cnt_thresh;
	unsigned int usb_pipe_handle;
	u32 flags;
	u8 ep_address;
	u8 logical_pipe_num;
	struct ath6kl_usb *ar_usb;
	u16 max_packet_size;
	struct work_struct io_complete_work;
	struct sk_buff_head io_comp_queue;
	struct usb_endpoint_descriptor *ep_desc;
};

#define ATH6KL_USB_PIPE_FLAG_TX    (1 << 0)

/* usb device object */
struct ath6kl_usb {
	/* protects pipe->urb_list_head and  pipe->urb_cnt */
	spinlock_t cs_lock;

	struct usb_device *udev;
	struct usb_interface *interface;
	struct ath6kl_usb_pipe pipes[ATH6KL_USB_PIPE_MAX];
	u8 *diag_cmd_buffer;
	u8 *diag_resp_buffer;
	struct ath6kl *ar;
	struct workqueue_struct *wq;
};

/* usb urb object */
struct ath6kl_urb_context {
	struct list_head link;
	struct ath6kl_usb_pipe *pipe;
	struct sk_buff *skb;
	struct ath6kl *ar;
};

/* USB endpoint definitions */
#define ATH6KL_USB_EP_ADDR_APP_CTRL_IN          0x81
#define ATH6KL_USB_EP_ADDR_APP_DATA_IN          0x82
#define ATH6KL_USB_EP_ADDR_APP_DATA2_IN         0x83
#define ATH6KL_USB_EP_ADDR_APP_INT_IN           0x84

#define ATH6KL_USB_EP_ADDR_APP_CTRL_OUT         0x01
#define ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT      0x02
#define ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT      0x03
#define ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT      0x04

/* diagnostic command definitions */
#define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD        1
#define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP       2
#define ATH6KL_USB_CONTROL_REQ_DIAG_CMD            3
#define ATH6KL_USB_CONTROL_REQ_DIAG_RESP           4

#define ATH6KL_USB_CTRL_DIAG_CC_READ               0
#define ATH6KL_USB_CTRL_DIAG_CC_WRITE              1

struct ath6kl_usb_ctrl_diag_cmd_write {
	__le32 cmd;
	__le32 address;
	__le32 value;
	__le32 _pad[1];
} __packed;

struct ath6kl_usb_ctrl_diag_cmd_read {
	__le32 cmd;
	__le32 address;
} __packed;

struct ath6kl_usb_ctrl_diag_resp_read {
	__le32 value;
} __packed;

/* function declarations */
static void ath6kl_usb_recv_complete(struct urb *urb);

#define ATH6KL_USB_IS_BULK_EP(attr) (((attr) & 3) == 0x02)
#define ATH6KL_USB_IS_INT_EP(attr)  (((attr) & 3) == 0x03)
#define ATH6KL_USB_IS_ISOC_EP(attr)  (((attr) & 3) == 0x01)
#define ATH6KL_USB_IS_DIR_IN(addr)  ((addr) & 0x80)

/* pipe/urb operations */
static struct ath6kl_urb_context *
ath6kl_usb_alloc_urb_from_pipe(struct ath6kl_usb_pipe *pipe)
{
	struct ath6kl_urb_context *urb_context = NULL;

Annotation

Implementation Notes