Quelle moxtet.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Turris Mox module configuration bus driver
*
* Copyright (C) 2019 Marek Behún <kabel@kernel.org>
*/

#ifndef __LINUX_MOXTET_H
#define __LINUX_MOXTET_H

#include <linux/device.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mutex.h>

#define TURRIS_MOX_MAX_MODULES 10

enum turris_mox_cpu_module_id {
TURRIS_MOX_CPU_ID_EMMC = 0x00,
TURRIS_MOX_CPU_ID_SD = 0x10,
};

enum turris_mox_module_id {
TURRIS_MOX_MODULE_FIRST  = 0x01,

TURRIS_MOX_MODULE_SFP  = 0x01,
TURRIS_MOX_MODULE_PCI  = 0x02,
TURRIS_MOX_MODULE_TOPAZ  = 0x03,
TURRIS_MOX_MODULE_PERIDOT = 0x04,
TURRIS_MOX_MODULE_USB3  = 0x05,
TURRIS_MOX_MODULE_PCI_BRIDGE = 0x06,

TURRIS_MOX_MODULE_LAST  = 0x06,
};

#define MOXTET_NIRQS 16

struct moxtet {
struct device   *dev;
struct mutex   lock;
u8    modules[TURRIS_MOX_MAX_MODULES];
int    count;
u8    tx[TURRIS_MOX_MAX_MODULES];
int    dev_irq;
struct {
  struct irq_domain *domain;
  struct irq_chip  chip;
  unsigned long  masked, exists;
  struct moxtet_irqpos {
     u8 idx;
     u8 bit;
  } position[MOXTET_NIRQS];
} irq;
#ifdef CONFIG_DEBUG_FS
struct dentry   *debugfs_root;
#endif
};

struct moxtet_driver {
const enum turris_mox_module_id *id_table;
struct device_driver  driver;
};

#define to_moxtet_driver(__drv) \
( __drv ? container_of_const(__drv, struct moxtet_driver, driver) : NULL )

extern int __moxtet_register_driver(struct module *owner,
        struct moxtet_driver *mdrv);

static inline void moxtet_unregister_driver(struct moxtet_driver *mdrv)
{
if (mdrv)
  driver_unregister(&mdrv->driver);
}

#define moxtet_register_driver(driver) \
__moxtet_register_driver(THIS_MODULE, driver)

#define module_moxtet_driver(__moxtet_driver) \
module_driver(__moxtet_driver, moxtet_register_driver, \
   moxtet_unregister_driver)

struct moxtet_device {
struct device   dev;
struct moxtet   *moxtet;
enum turris_mox_module_id id;
unsigned int   idx;
};

extern int moxtet_device_read(struct device *dev);
extern int moxtet_device_write(struct device *dev, u8 val);
extern int moxtet_device_written(struct device *dev);

static inline struct moxtet_device *
to_moxtet_device(struct device *dev)
{
if (!dev)
  return NULL;
return container_of(dev, struct moxtet_device, dev);
}

#endif /* __LINUX_MOXTET_H */

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