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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b233b28eac
This patch updates the maple bus to support asynchronous block reads and writes as well as generally improving the quality of the code and supporting concurrency (all needed to support the Dreamcast visual memory unit - a driver will also be posted for that). Changes in the bus driver necessitate some changes in the two maple bus input drivers that are currently in mainline. As well as supporting block reads and writes this code clean up removes some poor handling of locks, uses an atomic status variable to serialise access to devices and more robusly handles the general performance problems of the bus. Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
#ifndef __LINUX_MAPLE_H
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#define __LINUX_MAPLE_H
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#include <linux/device.h>
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#include <mach/maple.h>
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extern struct bus_type maple_bus_type;
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/* Maple Bus command and response codes */
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enum maple_code {
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MAPLE_RESPONSE_FILEERR = -5,
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MAPLE_RESPONSE_AGAIN, /* retransmit */
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MAPLE_RESPONSE_BADCMD,
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MAPLE_RESPONSE_BADFUNC,
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MAPLE_RESPONSE_NONE, /* unit didn't respond*/
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MAPLE_COMMAND_DEVINFO = 1,
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MAPLE_COMMAND_ALLINFO,
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MAPLE_COMMAND_RESET,
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MAPLE_COMMAND_KILL,
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MAPLE_RESPONSE_DEVINFO,
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MAPLE_RESPONSE_ALLINFO,
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MAPLE_RESPONSE_OK,
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MAPLE_RESPONSE_DATATRF,
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MAPLE_COMMAND_GETCOND,
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MAPLE_COMMAND_GETMINFO,
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MAPLE_COMMAND_BREAD,
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MAPLE_COMMAND_BWRITE,
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MAPLE_COMMAND_BSYNC,
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MAPLE_COMMAND_SETCOND,
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MAPLE_COMMAND_MICCONTROL
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};
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enum maple_file_errors {
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MAPLE_FILEERR_INVALID_PARTITION = 0x01000000,
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MAPLE_FILEERR_PHASE_ERROR = 0x02000000,
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MAPLE_FILEERR_INVALID_BLOCK = 0x04000000,
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MAPLE_FILEERR_WRITE_ERROR = 0x08000000,
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MAPLE_FILEERR_INVALID_WRITE_LENGTH = 0x10000000,
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MAPLE_FILEERR_BAD_CRC = 0x20000000
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};
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struct maple_buffer {
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char bufx[0x400];
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void *buf;
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};
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struct mapleq {
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struct list_head list;
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struct maple_device *dev;
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struct maple_buffer *recvbuf;
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void *sendbuf, *recvbuf_p2;
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unsigned char length;
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enum maple_code command;
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};
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struct maple_devinfo {
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unsigned long function;
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unsigned long function_data[3];
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unsigned char area_code;
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unsigned char connector_direction;
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char product_name[31];
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char product_licence[61];
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unsigned short standby_power;
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unsigned short max_power;
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};
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struct maple_device {
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struct maple_driver *driver;
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struct mapleq *mq;
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void (*callback) (struct mapleq * mq);
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void (*fileerr_handler)(struct maple_device *mdev, void *recvbuf);
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int (*can_unload)(struct maple_device *mdev);
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unsigned long when, interval, function;
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struct maple_devinfo devinfo;
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unsigned char port, unit;
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char product_name[32];
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char product_licence[64];
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atomic_t busy;
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wait_queue_head_t maple_wait;
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struct device dev;
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};
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struct maple_driver {
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unsigned long function;
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struct device_driver drv;
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};
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void maple_getcond_callback(struct maple_device *dev,
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void (*callback) (struct mapleq * mq),
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unsigned long interval,
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unsigned long function);
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int maple_driver_register(struct maple_driver *);
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void maple_driver_unregister(struct maple_driver *);
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int maple_add_packet(struct maple_device *mdev, u32 function,
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u32 command, u32 length, void *data);
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void maple_clear_dev(struct maple_device *mdev);
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#define to_maple_dev(n) container_of(n, struct maple_device, dev)
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#define to_maple_driver(n) container_of(n, struct maple_driver, drv)
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#define maple_get_drvdata(d) dev_get_drvdata(&(d)->dev)
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#define maple_set_drvdata(d,p) dev_set_drvdata(&(d)->dev, (p))
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#endif /* __LINUX_MAPLE_H */
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