Commit | Line | Data |
---|---|---|
8286ae03 JH |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2014 Imagination Technologies Ltd. | |
7 | */ | |
8 | #ifndef __ASM_CDMM_H | |
9 | #define __ASM_CDMM_H | |
10 | ||
11 | #include <linux/device.h> | |
12 | #include <linux/mod_devicetable.h> | |
13 | ||
14 | /** | |
15 | * struct mips_cdmm_device - Represents a single device on a CDMM bus. | |
16 | * @dev: Driver model device object. | |
17 | * @cpu: CPU which can access this device. | |
18 | * @res: MMIO resource. | |
19 | * @type: Device type identifier. | |
20 | * @rev: Device revision number. | |
21 | */ | |
22 | struct mips_cdmm_device { | |
23 | struct device dev; | |
24 | unsigned int cpu; | |
25 | struct resource res; | |
26 | unsigned int type; | |
27 | unsigned int rev; | |
28 | }; | |
29 | ||
30 | /** | |
31 | * struct mips_cdmm_driver - Represents a driver for a CDMM device. | |
32 | * @drv: Driver model driver object. | |
33 | * @probe Callback for probing newly discovered devices. | |
34 | * @remove: Callback to remove the device. | |
35 | * @shutdown: Callback on system shutdown. | |
36 | * @cpu_down: Callback when the parent CPU is going down. | |
37 | * Any CPU pinned threads/timers should be disabled. | |
38 | * @cpu_up: Callback when the parent CPU is coming back up again. | |
39 | * CPU pinned threads/timers can be restarted. | |
40 | * @id_table: Table for CDMM IDs to match against. | |
41 | */ | |
42 | struct mips_cdmm_driver { | |
43 | struct device_driver drv; | |
44 | int (*probe)(struct mips_cdmm_device *); | |
45 | int (*remove)(struct mips_cdmm_device *); | |
46 | void (*shutdown)(struct mips_cdmm_device *); | |
47 | int (*cpu_down)(struct mips_cdmm_device *); | |
48 | int (*cpu_up)(struct mips_cdmm_device *); | |
49 | const struct mips_cdmm_device_id *id_table; | |
50 | }; | |
51 | ||
52 | /** | |
53 | * mips_cdmm_phys_base() - Choose a physical base address for CDMM region. | |
54 | * | |
55 | * Picking a suitable physical address at which to map the CDMM region is | |
56 | * platform specific, so this weak function can be defined by platform code to | |
57 | * pick a suitable value if none is configured by the bootloader. | |
58 | * | |
59 | * This address must be 32kB aligned, and the region occupies a maximum of 32kB | |
60 | * of physical address space which must not be used for anything else. | |
61 | * | |
62 | * Returns: Physical base address for CDMM region, or 0 on failure. | |
63 | */ | |
64 | phys_addr_t __weak mips_cdmm_phys_base(void); | |
65 | ||
66 | extern struct bus_type mips_cdmm_bustype; | |
67 | void __iomem *mips_cdmm_early_probe(unsigned int dev_type); | |
68 | ||
69 | #define to_mips_cdmm_device(d) container_of(d, struct mips_cdmm_device, dev) | |
70 | ||
71 | #define mips_cdmm_get_drvdata(d) dev_get_drvdata(&d->dev) | |
72 | #define mips_cdmm_set_drvdata(d, p) dev_set_drvdata(&d->dev, p) | |
73 | ||
74 | int mips_cdmm_driver_register(struct mips_cdmm_driver *); | |
75 | void mips_cdmm_driver_unregister(struct mips_cdmm_driver *); | |
76 | ||
77 | /* | |
78 | * module_mips_cdmm_driver() - Helper macro for drivers that don't do | |
79 | * anything special in module init/exit. This eliminates a lot of | |
80 | * boilerplate. Each module may only use this macro once, and | |
81 | * calling it replaces module_init() and module_exit() | |
82 | */ | |
83 | #define module_mips_cdmm_driver(__mips_cdmm_driver) \ | |
84 | module_driver(__mips_cdmm_driver, mips_cdmm_driver_register, \ | |
85 | mips_cdmm_driver_unregister) | |
86 | ||
e934945d JH |
87 | /* drivers/tty/mips_ejtag_fdc.c */ |
88 | ||
89 | #ifdef CONFIG_MIPS_EJTAG_FDC_EARLYCON | |
90 | int setup_early_fdc_console(void); | |
91 | #else | |
92 | static inline int setup_early_fdc_console(void) | |
93 | { | |
94 | return -ENODEV; | |
95 | } | |
96 | #endif | |
97 | ||
8286ae03 | 98 | #endif /* __ASM_CDMM_H */ |