| Marek Behún | 5bc7f99 | 2019-08-12 18:11:14 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Turris Mox module configuration bus driver |
| 4 | * |
| 5 | * Copyright (C) 2019 Marek Behun <marek.behun@nic.cz> |
| 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 */ |