1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _VME_H_
3 #define _VME_H_
4 
5 #include <linux/bitops.h>
6 
7 /* Resource Type */
8 enum vme_resource_type {
9 	VME_MASTER,
10 	VME_SLAVE,
11 	VME_DMA,
12 	VME_LM
13 };
14 
15 /* VME Address Spaces */
16 #define VME_A16		0x1
17 #define VME_A24		0x2
18 #define	VME_A32		0x4
19 #define VME_A64		0x8
20 #define VME_CRCSR	0x10
21 #define VME_USER1	0x20
22 #define VME_USER2	0x40
23 #define VME_USER3	0x80
24 #define VME_USER4	0x100
25 
26 #define VME_A16_MAX	0x10000ULL
27 #define VME_A24_MAX	0x1000000ULL
28 #define VME_A32_MAX	0x100000000ULL
29 #define VME_A64_MAX	0x10000000000000000ULL
30 #define VME_CRCSR_MAX	0x1000000ULL
31 
32 /* VME Cycle Types */
33 #define VME_SCT		0x1
34 #define VME_BLT		0x2
35 #define VME_MBLT	0x4
36 #define VME_2eVME	0x8
37 #define VME_2eSST	0x10
38 #define VME_2eSSTB	0x20
39 
40 #define VME_2eSST160	0x100
41 #define VME_2eSST267	0x200
42 #define VME_2eSST320	0x400
43 
44 #define	VME_SUPER	0x1000
45 #define	VME_USER	0x2000
46 #define	VME_PROG	0x4000
47 #define	VME_DATA	0x8000
48 
49 /* VME Data Widths */
50 #define VME_D8		0x1
51 #define VME_D16		0x2
52 #define VME_D32		0x4
53 #define VME_D64		0x8
54 
55 /* Arbitration Scheduling Modes */
56 #define VME_R_ROBIN_MODE	0x1
57 #define VME_PRIORITY_MODE	0x2
58 
59 #define VME_DMA_PATTERN		BIT(0)
60 #define VME_DMA_PCI			BIT(1)
61 #define VME_DMA_VME			BIT(2)
62 
63 #define VME_DMA_PATTERN_BYTE		BIT(0)
64 #define VME_DMA_PATTERN_WORD		BIT(1)
65 #define VME_DMA_PATTERN_INCREMENT	BIT(2)
66 
67 #define VME_DMA_VME_TO_MEM		BIT(0)
68 #define VME_DMA_MEM_TO_VME		BIT(1)
69 #define VME_DMA_VME_TO_VME		BIT(2)
70 #define VME_DMA_MEM_TO_MEM		BIT(3)
71 #define VME_DMA_PATTERN_TO_VME		BIT(4)
72 #define VME_DMA_PATTERN_TO_MEM		BIT(5)
73 
74 struct vme_dma_attr {
75 	u32 type;
76 	void *private;
77 };
78 
79 struct vme_resource {
80 	enum vme_resource_type type;
81 	struct list_head *entry;
82 };
83 
84 extern struct bus_type vme_bus_type;
85 
86 /* Number of VME interrupt vectors */
87 #define VME_NUM_STATUSID	256
88 
89 /* VME_MAX_BRIDGES comes from the type of vme_bus_numbers */
90 #define VME_MAX_BRIDGES		(sizeof(unsigned int)*8)
91 #define VME_MAX_SLOTS		32
92 
93 #define VME_SLOT_CURRENT	-1
94 #define VME_SLOT_ALL		-2
95 
96 /**
97  * struct vme_dev - Structure representing a VME device
98  * @num: The device number
99  * @bridge: Pointer to the bridge device this device is on
100  * @dev: Internal device structure
101  * @drv_list: List of devices (per driver)
102  * @bridge_list: List of devices (per bridge)
103  */
104 struct vme_dev {
105 	int num;
106 	struct vme_bridge *bridge;
107 	struct device dev;
108 	struct list_head drv_list;
109 	struct list_head bridge_list;
110 };
111 
112 /**
113  * struct vme_driver - Structure representing a VME driver
114  * @name: Driver name, should be unique among VME drivers and usually the same
115  *        as the module name.
116  * @match: Callback used to determine whether probe should be run.
117  * @probe: Callback for device binding, called when new device is detected.
118  * @remove: Callback, called on device removal.
119  * @driver: Underlying generic device driver structure.
120  * @devices: List of VME devices (struct vme_dev) associated with this driver.
121  */
122 struct vme_driver {
123 	const char *name;
124 	int (*match)(struct vme_dev *);
125 	int (*probe)(struct vme_dev *);
126 	void (*remove)(struct vme_dev *);
127 	struct device_driver driver;
128 	struct list_head devices;
129 };
130 
131 void *vme_alloc_consistent(struct vme_resource *, size_t, dma_addr_t *);
132 void vme_free_consistent(struct vme_resource *, size_t,  void *,
133 	dma_addr_t);
134 
135 size_t vme_get_size(struct vme_resource *);
136 int vme_check_window(u32 aspace, unsigned long long vme_base,
137 		     unsigned long long size);
138 
139 struct vme_resource *vme_slave_request(struct vme_dev *, u32, u32);
140 int vme_slave_set(struct vme_resource *, int, unsigned long long,
141 	unsigned long long, dma_addr_t, u32, u32);
142 int vme_slave_get(struct vme_resource *, int *, unsigned long long *,
143 	unsigned long long *, dma_addr_t *, u32 *, u32 *);
144 void vme_slave_free(struct vme_resource *);
145 
146 struct vme_resource *vme_master_request(struct vme_dev *, u32, u32, u32);
147 int vme_master_set(struct vme_resource *, int, unsigned long long,
148 	unsigned long long, u32, u32, u32);
149 int vme_master_get(struct vme_resource *, int *, unsigned long long *,
150 	unsigned long long *, u32 *, u32 *, u32 *);
151 ssize_t vme_master_read(struct vme_resource *, void *, size_t, loff_t);
152 ssize_t vme_master_write(struct vme_resource *, void *, size_t, loff_t);
153 unsigned int vme_master_rmw(struct vme_resource *, unsigned int, unsigned int,
154 	unsigned int, loff_t);
155 int vme_master_mmap(struct vme_resource *resource, struct vm_area_struct *vma);
156 void vme_master_free(struct vme_resource *);
157 
158 struct vme_resource *vme_dma_request(struct vme_dev *, u32);
159 struct vme_dma_list *vme_new_dma_list(struct vme_resource *);
160 struct vme_dma_attr *vme_dma_pattern_attribute(u32, u32);
161 struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t);
162 struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long, u32, u32, u32);
163 void vme_dma_free_attribute(struct vme_dma_attr *);
164 int vme_dma_list_add(struct vme_dma_list *, struct vme_dma_attr *,
165 	struct vme_dma_attr *, size_t);
166 int vme_dma_list_exec(struct vme_dma_list *);
167 int vme_dma_list_free(struct vme_dma_list *);
168 int vme_dma_free(struct vme_resource *);
169 
170 int vme_irq_request(struct vme_dev *, int, int,
171 	void (*callback)(int, int, void *), void *);
172 void vme_irq_free(struct vme_dev *, int, int);
173 int vme_irq_generate(struct vme_dev *, int, int);
174 
175 struct vme_resource *vme_lm_request(struct vme_dev *);
176 int vme_lm_count(struct vme_resource *);
177 int vme_lm_set(struct vme_resource *, unsigned long long, u32, u32);
178 int vme_lm_get(struct vme_resource *, unsigned long long *, u32 *, u32 *);
179 int vme_lm_attach(struct vme_resource *, int, void (*callback)(void *), void *);
180 int vme_lm_detach(struct vme_resource *, int);
181 void vme_lm_free(struct vme_resource *);
182 
183 int vme_slot_num(struct vme_dev *);
184 int vme_bus_num(struct vme_dev *);
185 
186 int vme_register_driver(struct vme_driver *, unsigned int);
187 void vme_unregister_driver(struct vme_driver *);
188 
189 #endif /* _VME_H_ */
190 
191