1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Turris Mox module configuration bus driver 4 * 5 * Copyright (C) 2019 Marek Beh��n <kabel@kernel.org> 6 */ 7 8#ifndef __LINUX_MOXTET_H 9#define __LINUX_MOXTET_H 10 11#include <linux/device.h> 12#include <linux/irq.h> 13#include <linux/irqdomain.h> 14#include <linux/mutex.h> 15 16#define TURRIS_MOX_MAX_MODULES 10 17 18enum turris_mox_cpu_module_id { 19 TURRIS_MOX_CPU_ID_EMMC = 0x00, 20 TURRIS_MOX_CPU_ID_SD = 0x10, 21}; 22 23enum turris_mox_module_id { 24 TURRIS_MOX_MODULE_FIRST = 0x01, 25 26 TURRIS_MOX_MODULE_SFP = 0x01, 27 TURRIS_MOX_MODULE_PCI = 0x02, 28 TURRIS_MOX_MODULE_TOPAZ = 0x03, 29 TURRIS_MOX_MODULE_PERIDOT = 0x04, 30 TURRIS_MOX_MODULE_USB3 = 0x05, 31 TURRIS_MOX_MODULE_PCI_BRIDGE = 0x06, 32 33 TURRIS_MOX_MODULE_LAST = 0x06, 34}; 35 36#define MOXTET_NIRQS 16 37 38struct moxtet { 39 struct device *dev; 40 struct mutex lock; 41 u8 modules[TURRIS_MOX_MAX_MODULES]; 42 int count; 43 u8 tx[TURRIS_MOX_MAX_MODULES]; 44 int dev_irq; 45 struct { 46 struct irq_domain *domain; 47 struct irq_chip chip; 48 unsigned long masked, exists; 49 struct moxtet_irqpos { 50 u8 idx; 51 u8 bit; 52 } position[MOXTET_NIRQS]; 53 } irq; 54#ifdef CONFIG_DEBUG_FS 55 struct dentry *debugfs_root; 56#endif 57}; 58 59struct moxtet_driver { 60 const enum turris_mox_module_id *id_table; 61 struct device_driver driver; 62}; 63 64static inline struct moxtet_driver * 65to_moxtet_driver(struct device_driver *drv) 66{ 67 if (!drv) 68 return NULL; 69 return container_of(drv, struct moxtet_driver, driver); 70} 71 72extern int __moxtet_register_driver(struct module *owner, 73 struct moxtet_driver *mdrv); 74 75static inline void moxtet_unregister_driver(struct moxtet_driver *mdrv) 76{ 77 if (mdrv) 78 driver_unregister(&mdrv->driver); 79} 80 81#define moxtet_register_driver(driver) \ 82 __moxtet_register_driver(THIS_MODULE, driver) 83 84#define module_moxtet_driver(__moxtet_driver) \ 85 module_driver(__moxtet_driver, moxtet_register_driver, \ 86 moxtet_unregister_driver) 87 88struct moxtet_device { 89 struct device dev; 90 struct moxtet *moxtet; 91 enum turris_mox_module_id id; 92 unsigned int idx; 93}; 94 95extern int moxtet_device_read(struct device *dev); 96extern int moxtet_device_write(struct device *dev, u8 val); 97extern int moxtet_device_written(struct device *dev); 98 99static inline struct moxtet_device * 100to_moxtet_device(struct device *dev) 101{ 102 if (!dev) 103 return NULL; 104 return container_of(dev, struct moxtet_device, dev); 105} 106 107#endif /* __LINUX_MOXTET_H */ 108