ef11982dd7
Interrupt endpoints behave quite similar to the bulk endpoints with the difference that the endpoints expect data sending/reception request at particular intervals till the whole data has not been transmitted. The interrupt EP support is added to gadget zero. A new alternate setting (=2) has been added. It has 2 interrupt endpoints. The default parameters are set as: bInterval: 1 ms for FS and 8 uFrames (implying 1 ms) for HS/SS wMaxPacketSize: 64 bytes for FS and 1024 bytes for HS/SS However, the same can be overridden through the module parameter interface. The code is tested for HS and SS on a platform having DWC3 controller. Signed-off-by: Amit Virdi <amit.virdi@st.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* This header declares the utility functions used by "Gadget Zero", plus
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* interfaces to its two single-configuration function drivers.
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*/
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#ifndef __G_ZERO_H
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#define __G_ZERO_H
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#define GZERO_BULK_BUFLEN 4096
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#define GZERO_QLEN 32
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#define GZERO_ISOC_INTERVAL 4
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#define GZERO_ISOC_MAXPACKET 1024
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#define GZERO_INT_INTERVAL 1 /* Default interrupt interval = 1 ms */
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#define GZERO_INT_MAXPACKET 1024
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struct usb_zero_options {
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unsigned pattern;
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unsigned isoc_interval;
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unsigned isoc_maxpacket;
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unsigned isoc_mult;
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unsigned isoc_maxburst;
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unsigned int_interval; /* In ms */
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unsigned int_maxpacket;
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unsigned int_mult;
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unsigned int_maxburst;
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unsigned bulk_buflen;
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unsigned qlen;
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};
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struct f_ss_opts {
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struct usb_function_instance func_inst;
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unsigned pattern;
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unsigned isoc_interval;
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unsigned isoc_maxpacket;
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unsigned isoc_mult;
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unsigned isoc_maxburst;
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unsigned int_interval; /* In ms */
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unsigned int_maxpacket;
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unsigned int_mult;
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unsigned int_maxburst;
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unsigned bulk_buflen;
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/*
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* Read/write access to configfs attributes is handled by configfs.
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*
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* This is to protect the data from concurrent access by read/write
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* and create symlink/remove symlink.
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*/
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struct mutex lock;
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int refcnt;
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};
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struct f_lb_opts {
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struct usb_function_instance func_inst;
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unsigned bulk_buflen;
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unsigned qlen;
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/*
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* Read/write access to configfs attributes is handled by configfs.
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*
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* This is to protect the data from concurrent access by read/write
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* and create symlink/remove symlink.
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*/
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struct mutex lock;
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int refcnt;
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};
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void lb_modexit(void);
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int lb_modinit(void);
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/* common utilities */
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void free_ep_req(struct usb_ep *ep, struct usb_request *req);
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void disable_endpoints(struct usb_composite_dev *cdev,
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struct usb_ep *in, struct usb_ep *out,
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struct usb_ep *iso_in, struct usb_ep *iso_out,
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struct usb_ep *int_in, struct usb_ep *int_out);
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#endif /* __G_ZERO_H */
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