1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *  PS3 virtual uart
4  *
5  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
6  *  Copyright 2006 Sony Corp.
7  */
8 
9 #if !defined(_PS3_VUART_H)
10 #define _PS3_VUART_H
11 
12 #include <asm/ps3.h>
13 
14 struct ps3_vuart_stats {
15 	unsigned long bytes_written;
16 	unsigned long bytes_read;
17 	unsigned long tx_interrupts;
18 	unsigned long rx_interrupts;
19 	unsigned long disconnect_interrupts;
20 };
21 
22 struct ps3_vuart_work {
23 	struct work_struct work;
24 	unsigned long trigger;
25 	struct ps3_system_bus_device *dev; /* to convert work to device */
26 };
27 
28 /**
29  * struct ps3_vuart_port_driver - a driver for a device on a vuart port
30  */
31 
32 struct ps3_vuart_port_driver {
33 	struct ps3_system_bus_driver core;
34 	int (*probe)(struct ps3_system_bus_device *);
35 	int (*remove)(struct ps3_system_bus_device *);
36 	void (*shutdown)(struct ps3_system_bus_device *);
37 	void (*work)(struct ps3_system_bus_device *);
38 	/* int (*tx_event)(struct ps3_system_bus_device *dev); */
39 	/* int (*rx_event)(struct ps3_system_bus_device *dev); */
40 	/* int (*disconnect_event)(struct ps3_system_bus_device *dev); */
41 	/* int (*suspend)(struct ps3_system_bus_device *, pm_message_t); */
42 	/* int (*resume)(struct ps3_system_bus_device *); */
43 };
44 
45 int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv);
46 void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv);
47 
48 static inline struct ps3_vuart_port_driver *
ps3_system_bus_dev_to_vuart_drv(struct ps3_system_bus_device * _dev)49 	ps3_system_bus_dev_to_vuart_drv(struct ps3_system_bus_device *_dev)
50 {
51 	struct ps3_system_bus_driver *sbd =
52 		ps3_system_bus_dev_to_system_bus_drv(_dev);
53 	BUG_ON(!sbd);
54 	return container_of(sbd, struct ps3_vuart_port_driver, core);
55 }
ps3_vuart_work_to_system_bus_dev(struct work_struct * _work)56 static inline struct ps3_system_bus_device *ps3_vuart_work_to_system_bus_dev(
57 	struct work_struct *_work)
58 {
59 	struct ps3_vuart_work *vw = container_of(_work, struct ps3_vuart_work,
60 		work);
61 	return vw->dev;
62 }
63 
64 int ps3_vuart_write(struct ps3_system_bus_device *dev, const void *buf,
65 	unsigned int bytes);
66 int ps3_vuart_read(struct ps3_system_bus_device *dev, void *buf,
67 	unsigned int bytes);
68 int ps3_vuart_read_async(struct ps3_system_bus_device *dev, unsigned int bytes);
69 void ps3_vuart_cancel_async(struct ps3_system_bus_device *dev);
70 void ps3_vuart_clear_rx_bytes(struct ps3_system_bus_device *dev,
71 	unsigned int bytes);
72 
73 struct vuart_triggers {
74 	unsigned long rx;
75 	unsigned long tx;
76 };
77 
78 int ps3_vuart_get_triggers(struct ps3_system_bus_device *dev,
79 	struct vuart_triggers *trig);
80 int ps3_vuart_set_triggers(struct ps3_system_bus_device *dev, unsigned int tx,
81 	unsigned int rx);
82 int ps3_vuart_enable_interrupt_tx(struct ps3_system_bus_device *dev);
83 int ps3_vuart_disable_interrupt_tx(struct ps3_system_bus_device *dev);
84 int ps3_vuart_enable_interrupt_rx(struct ps3_system_bus_device *dev);
85 int ps3_vuart_disable_interrupt_rx(struct ps3_system_bus_device *dev);
86 int ps3_vuart_enable_interrupt_disconnect(struct ps3_system_bus_device *dev);
87 int ps3_vuart_disable_interrupt_disconnect(struct ps3_system_bus_device *dev);
88 
89 #endif
90