Eric Lee / smarc-fsl-linux-kernel

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include/linux/moxtet.h 2.37 KB
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5bc7f990c   Marek Behún   bus: Add support ... 
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  /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * Turris Mox module configuration bus driver
   *
   * Copyright (C) 2019 Marek Behun <marek.behun@nic.cz>
   */
  
  #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
  
  extern struct bus_type moxtet_type;
  
  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;
  };
  
  static inline struct moxtet_driver *
  to_moxtet_driver(struct device_driver *drv)
  {
  	if (!drv)
  		return NULL;
  	return container_of(drv, struct moxtet_driver, driver);
  }
  
  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 */