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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ea1547d311
Add asynchronous read support to the PS3 vuart driver. This is needed to support the PS3 system manager driver. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/*
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* PS3 virtual uart
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*
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* Copyright (C) 2006 Sony Computer Entertainment Inc.
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* Copyright 2006 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#if !defined(_PS3_VUART_H)
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#define _PS3_VUART_H
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#include <asm/ps3.h>
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struct ps3_vuart_stats {
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unsigned long bytes_written;
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unsigned long bytes_read;
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unsigned long tx_interrupts;
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unsigned long rx_interrupts;
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unsigned long disconnect_interrupts;
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};
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struct ps3_vuart_work {
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struct work_struct work;
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unsigned long trigger;
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spinlock_t lock;
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struct ps3_vuart_port_device* dev; /* to convert work to device */
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};
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/**
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* struct ps3_vuart_port_priv - private vuart device data.
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*/
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struct ps3_vuart_port_priv {
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unsigned int port_number;
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u64 interrupt_mask;
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struct {
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spinlock_t lock;
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struct list_head head;
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} tx_list;
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struct {
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unsigned long bytes_held;
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spinlock_t lock;
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struct list_head head;
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} rx_list;
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struct ps3_vuart_stats stats;
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struct ps3_vuart_work work;
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};
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/**
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* struct ps3_vuart_port_driver - a driver for a device on a vuart port
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*/
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struct ps3_vuart_port_driver {
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enum ps3_match_id match_id;
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struct device_driver core;
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int (*probe)(struct ps3_vuart_port_device *);
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int (*remove)(struct ps3_vuart_port_device *);
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void (*shutdown)(struct ps3_vuart_port_device *);
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int (*tx_event)(struct ps3_vuart_port_device *dev);
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int (*rx_event)(struct ps3_vuart_port_device *dev);
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int (*disconnect_event)(struct ps3_vuart_port_device *dev);
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/* int (*suspend)(struct ps3_vuart_port_device *, pm_message_t); */
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/* int (*resume)(struct ps3_vuart_port_device *); */
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};
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int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv);
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void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv);
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static inline struct ps3_vuart_port_driver *to_ps3_vuart_port_driver(
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struct device_driver *_drv)
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{
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return container_of(_drv, struct ps3_vuart_port_driver, core);
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}
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static inline struct ps3_vuart_port_device *to_ps3_vuart_port_device(
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struct device *_dev)
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{
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return container_of(_dev, struct ps3_vuart_port_device, core);
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}
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static inline struct ps3_vuart_port_device *ps3_vuart_work_to_port_device(
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struct work_struct *_work)
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{
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struct ps3_vuart_work *vw = container_of(_work, struct ps3_vuart_work,
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work);
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return vw->dev;
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}
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int ps3_vuart_write(struct ps3_vuart_port_device *dev, const void* buf,
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unsigned int bytes);
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int ps3_vuart_read(struct ps3_vuart_port_device *dev, void* buf,
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unsigned int bytes);
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int ps3_vuart_read_async(struct ps3_vuart_port_device *dev, work_func_t func,
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unsigned int bytes);
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void ps3_vuart_cancel_async(struct ps3_vuart_port_device *dev);
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void ps3_vuart_clear_rx_bytes(struct ps3_vuart_port_device *dev,
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unsigned int bytes);
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#endif
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