forked from mirrors/linux
d69d804845
In the match() callback, the struct device_driver * should not be changed, so change the function callback to be a const *. This is one step of many towards making the driver core safe to have struct device_driver in read-only memory. Because the match() callback is in all busses, all busses are modified to handle this properly. This does entail switching some container_of() calls to container_of_const() to properly handle the constant *. For some busses, like PCI and USB and HV, the const * is cast away in the match callback as those busses do want to modify those structures at this point in time (they have a local lock in the driver structure.) That will have to be changed in the future if they wish to have their struct device * in read-only-memory. Cc: Rafael J. Wysocki <rafael@kernel.org> Reviewed-by: Alex Elder <elder@kernel.org> Acked-by: Sumit Garg <sumit.garg@linaro.org> Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_MAPLE_H
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#define __LINUX_MAPLE_H
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#include <mach/maple.h>
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struct device;
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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_const(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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