// SPDX-License-Identifier: GPL-2.0-or-later /* hfcsusb.c * mISDN driver for Colognechip HFC-S USB chip * * Copyright 2001 by Peter Sprenger ([email protected]) * Copyright 2008 by Martin Bachem ([email protected]) * * module params * debug=<n>, default=0, with n=0xHHHHGGGG * H - l1 driver flags described in hfcsusb.h * G - common mISDN debug flags described at mISDNhw.h * * poll=<n>, default 128 * n : burst size of PH_DATA_IND at transparent rx data * * Revision: 0.3.3 (socket), 2008-11-05 */ #include <linux/module.h> #include <linux/delay.h> #include <linux/usb.h> #include <linux/mISDNhw.h> #include <linux/slab.h> #include "hfcsusb.h" static unsigned int debug; static int poll = …; static LIST_HEAD(HFClist); static DEFINE_RWLOCK(HFClock); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; module_param(debug, uint, S_IRUGO | S_IWUSR); module_param(poll, int, 0); static int hfcsusb_cnt; /* some function prototypes */ static void hfcsusb_ph_command(struct hfcsusb *hw, u_char command); static void release_hw(struct hfcsusb *hw); static void reset_hfcsusb(struct hfcsusb *hw); static void setPortMode(struct hfcsusb *hw); static void hfcsusb_start_endpoint(struct hfcsusb *hw, int channel); static void hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel); static int hfcsusb_setup_bch(struct bchannel *bch, int protocol); static void deactivate_bchannel(struct bchannel *bch); static int hfcsusb_ph_info(struct hfcsusb *hw); /* start next background transfer for control channel */ static void ctrl_start_transfer(struct hfcsusb *hw) { … } /* * queue a control transfer request to write HFC-S USB * chip register using CTRL resuest queue */ static int write_reg(struct hfcsusb *hw, __u8 reg, __u8 val) { … } /* control completion routine handling background control cmds */ static void ctrl_complete(struct urb *urb) { … } /* handle LED bits */ static void set_led_bit(struct hfcsusb *hw, signed short led_bits, int set_on) { … } /* handle LED requests */ static void handle_led(struct hfcsusb *hw, int event) { … } /* * Layer2 -> Layer 1 Bchannel data */ static int hfcusb_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb) { … } /* * send full D/B channel status information * as MPH_INFORMATION_IND */ static int hfcsusb_ph_info(struct hfcsusb *hw) { … } /* * Layer2 -> Layer 1 Dchannel data */ static int hfcusb_l2l1D(struct mISDNchannel *ch, struct sk_buff *skb) { … } /* * Layer 1 callback function */ static int hfc_l1callback(struct dchannel *dch, u_int cmd) { … } static int open_dchannel(struct hfcsusb *hw, struct mISDNchannel *ch, struct channel_req *rq) { … } static int open_bchannel(struct hfcsusb *hw, struct channel_req *rq) { … } static int channel_ctrl(struct hfcsusb *hw, struct mISDN_ctrl_req *cq) { … } /* * device control function */ static int hfc_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg) { … } /* * S0 TE state change event handler */ static void ph_state_te(struct dchannel *dch) { … } /* * S0 NT state change event handler */ static void ph_state_nt(struct dchannel *dch) { … } static void ph_state(struct dchannel *dch) { … } /* * disable/enable BChannel for desired protocol */ static int hfcsusb_setup_bch(struct bchannel *bch, int protocol) { … } static void hfcsusb_ph_command(struct hfcsusb *hw, u_char command) { … } /* * Layer 1 B-channel hardware access */ static int channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq) { … } /* collect data from incoming interrupt or isochron USB data */ static void hfcsusb_rx_frame(struct usb_fifo *fifo, __u8 *data, unsigned int len, int finish) { … } static void fill_isoc_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *buf, int num_packets, int packet_size, int interval, usb_complete_t complete, void *context) { … } /* receive completion routine for all ISO tx fifos */ static void rx_iso_complete(struct urb *urb) { … } /* receive completion routine for all interrupt rx fifos */ static void rx_int_complete(struct urb *urb) { … } /* transmit completion routine for all ISO tx fifos */ static void tx_iso_complete(struct urb *urb) { … } /* * allocs urbs and start isoc transfer with two pending urbs to avoid * gaps in the transfer chain */ static int start_isoc_chain(struct usb_fifo *fifo, int num_packets_per_urb, usb_complete_t complete, int packet_size) { … } static void stop_iso_gracefull(struct usb_fifo *fifo) { … } static void stop_int_gracefull(struct usb_fifo *fifo) { … } /* start the interrupt transfer for the given fifo */ static void start_int_fifo(struct usb_fifo *fifo) { … } static void setPortMode(struct hfcsusb *hw) { … } static void reset_hfcsusb(struct hfcsusb *hw) { … } /* start USB data pipes dependand on device's endpoint configuration */ static void hfcsusb_start_endpoint(struct hfcsusb *hw, int channel) { … } /* stop USB data pipes dependand on device's endpoint configuration */ static void hfcsusb_stop_endpoint(struct hfcsusb *hw, int channel) { … } /* Hardware Initialization */ static int setup_hfcsusb(struct hfcsusb *hw) { … } static void release_hw(struct hfcsusb *hw) { … } static void deactivate_bchannel(struct bchannel *bch) { … } /* * Layer 1 B-channel hardware access */ static int hfc_bctrl(struct mISDNchannel *ch, u_int cmd, void *arg) { … } static int setup_instance(struct hfcsusb *hw, struct device *parent) { … } static int hfcsusb_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } /* function called when an active device is removed */ static void hfcsusb_disconnect(struct usb_interface *intf) { … } static struct usb_driver hfcsusb_drv = …; module_usb_driver(…) …;
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