1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Turris Mox module configuration bus driver 4 * 5 * Copyright (C) 2019 Marek Behún <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 18 enum turris_mox_cpu_module_id { 19 TURRIS_MOX_CPU_ID_EMMC = 0x00, 20 TURRIS_MOX_CPU_ID_SD = 0x10, 21 }; 22 23 enum 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 38 extern struct bus_type moxtet_type; 39 40 struct moxtet { 41 struct device *dev; 42 struct mutex lock; 43 u8 modules[TURRIS_MOX_MAX_MODULES]; 44 int count; 45 u8 tx[TURRIS_MOX_MAX_MODULES]; 46 int dev_irq; 47 struct { 48 struct irq_domain *domain; 49 struct irq_chip chip; 50 unsigned long masked, exists; 51 struct moxtet_irqpos { 52 u8 idx; 53 u8 bit; 54 } position[MOXTET_NIRQS]; 55 } irq; 56 #ifdef CONFIG_DEBUG_FS 57 struct dentry *debugfs_root; 58 #endif 59 }; 60 61 struct moxtet_driver { 62 const enum turris_mox_module_id *id_table; 63 struct device_driver driver; 64 }; 65 66 static inline struct moxtet_driver * 67 to_moxtet_driver(struct device_driver *drv) 68 { 69 if (!drv) 70 return NULL; 71 return container_of(drv, struct moxtet_driver, driver); 72 } 73 74 extern int __moxtet_register_driver(struct module *owner, 75 struct moxtet_driver *mdrv); 76 77 static inline void moxtet_unregister_driver(struct moxtet_driver *mdrv) 78 { 79 if (mdrv) 80 driver_unregister(&mdrv->driver); 81 } 82 83 #define moxtet_register_driver(driver) \ 84 __moxtet_register_driver(THIS_MODULE, driver) 85 86 #define module_moxtet_driver(__moxtet_driver) \ 87 module_driver(__moxtet_driver, moxtet_register_driver, \ 88 moxtet_unregister_driver) 89 90 struct moxtet_device { 91 struct device dev; 92 struct moxtet *moxtet; 93 enum turris_mox_module_id id; 94 unsigned int idx; 95 }; 96 97 extern int moxtet_device_read(struct device *dev); 98 extern int moxtet_device_write(struct device *dev, u8 val); 99 extern int moxtet_device_written(struct device *dev); 100 101 static inline struct moxtet_device * 102 to_moxtet_device(struct device *dev) 103 { 104 if (!dev) 105 return NULL; 106 return container_of(dev, struct moxtet_device, dev); 107 } 108 109 #endif /* __LINUX_MOXTET_H */ 110