drivers/ps3/vuart.h

   1 /*
   2  *  PS3 virtual uart
   3  *
   4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
   5  *  Copyright 2006 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #if !defined(_PS3_VUART_H)
  22 #define _PS3_VUART_H
  23
  24 #include <asm/ps3.h>
  25
  26 struct ps3_vuart_stats {
  27         unsigned long bytes_written;
  28         unsigned long bytes_read;
  29         unsigned long tx_interrupts;
  30         unsigned long rx_interrupts;
  31         unsigned long disconnect_interrupts;
  32 };
  33
  34 struct ps3_vuart_work {
  35         struct work_struct work;
  36         unsigned long trigger;
  37         spinlock_t lock;
  38         struct ps3_vuart_port_device* dev; /* to convert work to device */
  39 };
  40
  41 /**
  42  * struct ps3_vuart_port_priv - private vuart device data.
  43  */
  44
  45 struct ps3_vuart_port_priv {
  46         unsigned int port_number;
  47         u64 interrupt_mask;
  48
  49         struct {
  50                 spinlock_t lock;
  51                 struct list_head head;
  52         } tx_list;
  53         struct {
  54                 unsigned long bytes_held;
  55                 spinlock_t lock;
  56                 struct list_head head;
  57         } rx_list;
  58         struct ps3_vuart_stats stats;
  59         struct ps3_vuart_work work;
  60 };
  61
  62 /**
  63  * struct ps3_vuart_port_driver - a driver for a device on a vuart port
  64  */
  65
  66 struct ps3_vuart_port_driver {
  67         enum ps3_match_id match_id;
  68         struct device_driver core;
  69         int (*probe)(struct ps3_vuart_port_device *);
  70         int (*remove)(struct ps3_vuart_port_device *);
  71         void (*shutdown)(struct ps3_vuart_port_device *);
  72         int (*tx_event)(struct ps3_vuart_port_device *dev);
  73         int (*rx_event)(struct ps3_vuart_port_device *dev);
  74         int (*disconnect_event)(struct ps3_vuart_port_device *dev);
  75         /* int (*suspend)(struct ps3_vuart_port_device *, pm_message_t); */
  76         /* int (*resume)(struct ps3_vuart_port_device *); */
  77 };
  78
  79 int ps3_vuart_port_driver_register(struct ps3_vuart_port_driver *drv);
  80 void ps3_vuart_port_driver_unregister(struct ps3_vuart_port_driver *drv);
  81
  82 static inline struct ps3_vuart_port_driver *to_ps3_vuart_port_driver(
  83         struct device_driver *_drv)
  84 {
  85         return container_of(_drv, struct ps3_vuart_port_driver, core);
  86 }
  87 static inline struct ps3_vuart_port_device *to_ps3_vuart_port_device(
  88         struct device *_dev)
  89 {
  90         return container_of(_dev, struct ps3_vuart_port_device, core);
  91 }
  92 static inline struct ps3_vuart_port_device *ps3_vuart_work_to_port_device(
  93         struct work_struct *_work)
  94 {
  95         struct ps3_vuart_work *vw = container_of(_work, struct ps3_vuart_work,
  96                 work);
  97         return vw->dev;
  98 }
  99
 100 int ps3_vuart_write(struct ps3_vuart_port_device *dev, const void* buf,
 101         unsigned int bytes);
 102 int ps3_vuart_read(struct ps3_vuart_port_device *dev, void* buf,
 103         unsigned int bytes);
 104 int ps3_vuart_read_async(struct ps3_vuart_port_device *dev, work_func_t func,
 105         unsigned int bytes);
 106 void ps3_vuart_cancel_async(struct ps3_vuart_port_device *dev);
 107 void ps3_vuart_clear_rx_bytes(struct ps3_vuart_port_device *dev,
 108         unsigned int bytes);
 109
 110 #endif