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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
5f5bac82 MM |
2 | /* |
3 | * cb710/cb710.h | |
4 | * | |
5 | * Copyright by Michał Mirosław, 2008-2009 | |
5f5bac82 MM |
6 | */ |
7 | #ifndef LINUX_CB710_DRIVER_H | |
8 | #define LINUX_CB710_DRIVER_H | |
9 | ||
5f5bac82 MM |
10 | #include <linux/io.h> |
11 | #include <linux/interrupt.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/pci.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/mmc/host.h> | |
16 | ||
17 | struct cb710_slot; | |
18 | ||
19 | typedef int (*cb710_irq_handler_t)(struct cb710_slot *); | |
20 | ||
21 | /* per-virtual-slot structure */ | |
22 | struct cb710_slot { | |
23 | struct platform_device pdev; | |
24 | void __iomem *iobase; | |
25 | cb710_irq_handler_t irq_handler; | |
26 | }; | |
27 | ||
28 | /* per-device structure */ | |
29 | struct cb710_chip { | |
30 | struct pci_dev *pdev; | |
31 | void __iomem *iobase; | |
32 | unsigned platform_id; | |
33 | #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS | |
34 | atomic_t slot_refs_count; | |
35 | #endif | |
36 | unsigned slot_mask; | |
37 | unsigned slots; | |
38 | spinlock_t irq_lock; | |
39 | struct cb710_slot slot[0]; | |
40 | }; | |
41 | ||
42 | /* NOTE: cb710_chip.slots is modified only during device init/exit and | |
43 | * they are all serialized wrt themselves */ | |
44 | ||
45 | /* cb710_chip.slot_mask values */ | |
46 | #define CB710_SLOT_MMC 1 | |
47 | #define CB710_SLOT_MS 2 | |
48 | #define CB710_SLOT_SM 4 | |
49 | ||
50 | /* slot port accessors - so the logic is more clear in the code */ | |
51 | #define CB710_PORT_ACCESSORS(t) \ | |
52 | static inline void cb710_write_port_##t(struct cb710_slot *slot, \ | |
53 | unsigned port, u##t value) \ | |
54 | { \ | |
55 | iowrite##t(value, slot->iobase + port); \ | |
56 | } \ | |
57 | \ | |
58 | static inline u##t cb710_read_port_##t(struct cb710_slot *slot, \ | |
59 | unsigned port) \ | |
60 | { \ | |
61 | return ioread##t(slot->iobase + port); \ | |
62 | } \ | |
63 | \ | |
64 | static inline void cb710_modify_port_##t(struct cb710_slot *slot, \ | |
65 | unsigned port, u##t set, u##t clear) \ | |
66 | { \ | |
67 | iowrite##t( \ | |
68 | (ioread##t(slot->iobase + port) & ~clear)|set, \ | |
69 | slot->iobase + port); \ | |
70 | } | |
71 | ||
72 | CB710_PORT_ACCESSORS(8) | |
73 | CB710_PORT_ACCESSORS(16) | |
74 | CB710_PORT_ACCESSORS(32) | |
75 | ||
76 | void cb710_pci_update_config_reg(struct pci_dev *pdev, | |
77 | int reg, uint32_t and, uint32_t xor); | |
78 | void cb710_set_irq_handler(struct cb710_slot *slot, | |
79 | cb710_irq_handler_t handler); | |
80 | ||
81 | /* some device struct walking */ | |
82 | ||
83 | static inline struct cb710_slot *cb710_pdev_to_slot( | |
84 | struct platform_device *pdev) | |
85 | { | |
86 | return container_of(pdev, struct cb710_slot, pdev); | |
87 | } | |
88 | ||
89 | static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot) | |
90 | { | |
91 | return dev_get_drvdata(slot->pdev.dev.parent); | |
92 | } | |
93 | ||
94 | static inline struct device *cb710_slot_dev(struct cb710_slot *slot) | |
95 | { | |
96 | return &slot->pdev.dev; | |
97 | } | |
98 | ||
99 | static inline struct device *cb710_chip_dev(struct cb710_chip *chip) | |
100 | { | |
101 | return &chip->pdev->dev; | |
102 | } | |
103 | ||
104 | /* debugging aids */ | |
105 | ||
106 | #ifdef CONFIG_CB710_DEBUG | |
107 | void cb710_dump_regs(struct cb710_chip *chip, unsigned dump); | |
108 | #else | |
109 | #define cb710_dump_regs(c, d) do {} while (0) | |
110 | #endif | |
111 | ||
112 | #define CB710_DUMP_REGS_MMC 0x0F | |
113 | #define CB710_DUMP_REGS_MS 0x30 | |
114 | #define CB710_DUMP_REGS_SM 0xC0 | |
115 | #define CB710_DUMP_REGS_ALL 0xFF | |
116 | #define CB710_DUMP_REGS_MASK 0xFF | |
117 | ||
118 | #define CB710_DUMP_ACCESS_8 0x100 | |
119 | #define CB710_DUMP_ACCESS_16 0x200 | |
120 | #define CB710_DUMP_ACCESS_32 0x400 | |
121 | #define CB710_DUMP_ACCESS_ALL 0x700 | |
122 | #define CB710_DUMP_ACCESS_MASK 0x700 | |
123 | ||
124 | #endif /* LINUX_CB710_DRIVER_H */ | |
125 | /* | |
126 | * cb710/sgbuf2.h | |
127 | * | |
128 | * Copyright by Michał Mirosław, 2008-2009 | |
5f5bac82 MM |
129 | */ |
130 | #ifndef LINUX_CB710_SG_H | |
131 | #define LINUX_CB710_SG_H | |
132 | ||
133 | #include <linux/highmem.h> | |
134 | #include <linux/scatterlist.h> | |
135 | ||
5f5bac82 MM |
136 | /* |
137 | * 32-bit PIO mapping sg iterator | |
138 | * | |
139 | * Hides scatterlist access issues - fragment boundaries, alignment, page | |
140 | * mapping - for drivers using 32-bit-word-at-a-time-PIO (ie. PCI devices | |
141 | * without DMA support). | |
142 | * | |
143 | * Best-case reading (transfer from device): | |
4b2a108c | 144 | * sg_miter_start(, SG_MITER_TO_SG); |
5f5bac82 | 145 | * cb710_sg_dwiter_write_from_io(); |
4b2a108c | 146 | * sg_miter_stop(); |
5f5bac82 MM |
147 | * |
148 | * Best-case writing (transfer to device): | |
4b2a108c | 149 | * sg_miter_start(, SG_MITER_FROM_SG); |
5f5bac82 MM |
150 | * cb710_sg_dwiter_read_to_io(); |
151 | * sg_miter_stop(); | |
152 | */ | |
153 | ||
154 | uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter); | |
155 | void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data); | |
156 | ||
157 | /** | |
158 | * cb710_sg_dwiter_write_from_io - transfer data to mapped buffer from 32-bit IO port | |
159 | * @miter: sg mapping iter | |
160 | * @port: PIO port - IO or MMIO address | |
161 | * @count: number of 32-bit words to transfer | |
162 | * | |
163 | * Description: | |
164 | * Reads @count 32-bit words from register @port and stores it in | |
165 | * buffer iterated by @miter. Data that would overflow the buffer | |
166 | * is silently ignored. Iterator is advanced by 4*@count bytes | |
167 | * or to the buffer's end whichever is closer. | |
168 | * | |
169 | * Context: | |
170 | * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. | |
171 | */ | |
172 | static inline void cb710_sg_dwiter_write_from_io(struct sg_mapping_iter *miter, | |
173 | void __iomem *port, size_t count) | |
174 | { | |
175 | while (count-- > 0) | |
176 | cb710_sg_dwiter_write_next_block(miter, ioread32(port)); | |
177 | } | |
178 | ||
179 | /** | |
180 | * cb710_sg_dwiter_read_to_io - transfer data to 32-bit IO port from mapped buffer | |
181 | * @miter: sg mapping iter | |
182 | * @port: PIO port - IO or MMIO address | |
183 | * @count: number of 32-bit words to transfer | |
184 | * | |
185 | * Description: | |
186 | * Writes @count 32-bit words to register @port from buffer iterated | |
187 | * through @miter. If buffer ends before @count words are written | |
188 | * missing data is replaced by zeroes. @miter is advanced by 4*@count | |
189 | * bytes or to the buffer's end whichever is closer. | |
190 | * | |
191 | * Context: | |
192 | * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. | |
193 | */ | |
194 | static inline void cb710_sg_dwiter_read_to_io(struct sg_mapping_iter *miter, | |
195 | void __iomem *port, size_t count) | |
196 | { | |
197 | while (count-- > 0) | |
198 | iowrite32(cb710_sg_dwiter_read_next_block(miter), port); | |
199 | } | |
200 | ||
201 | #endif /* LINUX_CB710_SG_H */ |