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1 | /* |
2 | * cb710/cb710.h | |
3 | * | |
4 | * Copyright by Michał Mirosław, 2008-2009 | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #ifndef LINUX_CB710_DRIVER_H | |
11 | #define LINUX_CB710_DRIVER_H | |
12 | ||
13 | #ifdef CONFIG_CB710_DEBUG | |
14 | #define DEBUG | |
15 | #endif | |
16 | ||
17 | /* verify assumptions on platform_device framework */ | |
18 | #define CONFIG_CB710_DEBUG_ASSUMPTIONS | |
19 | ||
20 | #include <linux/io.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/pci.h> | |
24 | #include <linux/platform_device.h> | |
25 | #include <linux/mmc/host.h> | |
26 | ||
27 | struct cb710_slot; | |
28 | ||
29 | typedef int (*cb710_irq_handler_t)(struct cb710_slot *); | |
30 | ||
31 | /* per-virtual-slot structure */ | |
32 | struct cb710_slot { | |
33 | struct platform_device pdev; | |
34 | void __iomem *iobase; | |
35 | cb710_irq_handler_t irq_handler; | |
36 | }; | |
37 | ||
38 | /* per-device structure */ | |
39 | struct cb710_chip { | |
40 | struct pci_dev *pdev; | |
41 | void __iomem *iobase; | |
42 | unsigned platform_id; | |
43 | #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS | |
44 | atomic_t slot_refs_count; | |
45 | #endif | |
46 | unsigned slot_mask; | |
47 | unsigned slots; | |
48 | spinlock_t irq_lock; | |
49 | struct cb710_slot slot[0]; | |
50 | }; | |
51 | ||
52 | /* NOTE: cb710_chip.slots is modified only during device init/exit and | |
53 | * they are all serialized wrt themselves */ | |
54 | ||
55 | /* cb710_chip.slot_mask values */ | |
56 | #define CB710_SLOT_MMC 1 | |
57 | #define CB710_SLOT_MS 2 | |
58 | #define CB710_SLOT_SM 4 | |
59 | ||
60 | /* slot port accessors - so the logic is more clear in the code */ | |
61 | #define CB710_PORT_ACCESSORS(t) \ | |
62 | static inline void cb710_write_port_##t(struct cb710_slot *slot, \ | |
63 | unsigned port, u##t value) \ | |
64 | { \ | |
65 | iowrite##t(value, slot->iobase + port); \ | |
66 | } \ | |
67 | \ | |
68 | static inline u##t cb710_read_port_##t(struct cb710_slot *slot, \ | |
69 | unsigned port) \ | |
70 | { \ | |
71 | return ioread##t(slot->iobase + port); \ | |
72 | } \ | |
73 | \ | |
74 | static inline void cb710_modify_port_##t(struct cb710_slot *slot, \ | |
75 | unsigned port, u##t set, u##t clear) \ | |
76 | { \ | |
77 | iowrite##t( \ | |
78 | (ioread##t(slot->iobase + port) & ~clear)|set, \ | |
79 | slot->iobase + port); \ | |
80 | } | |
81 | ||
82 | CB710_PORT_ACCESSORS(8) | |
83 | CB710_PORT_ACCESSORS(16) | |
84 | CB710_PORT_ACCESSORS(32) | |
85 | ||
86 | void cb710_pci_update_config_reg(struct pci_dev *pdev, | |
87 | int reg, uint32_t and, uint32_t xor); | |
88 | void cb710_set_irq_handler(struct cb710_slot *slot, | |
89 | cb710_irq_handler_t handler); | |
90 | ||
91 | /* some device struct walking */ | |
92 | ||
93 | static inline struct cb710_slot *cb710_pdev_to_slot( | |
94 | struct platform_device *pdev) | |
95 | { | |
96 | return container_of(pdev, struct cb710_slot, pdev); | |
97 | } | |
98 | ||
99 | static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot) | |
100 | { | |
101 | return dev_get_drvdata(slot->pdev.dev.parent); | |
102 | } | |
103 | ||
104 | static inline struct device *cb710_slot_dev(struct cb710_slot *slot) | |
105 | { | |
106 | return &slot->pdev.dev; | |
107 | } | |
108 | ||
109 | static inline struct device *cb710_chip_dev(struct cb710_chip *chip) | |
110 | { | |
111 | return &chip->pdev->dev; | |
112 | } | |
113 | ||
114 | /* debugging aids */ | |
115 | ||
116 | #ifdef CONFIG_CB710_DEBUG | |
117 | void cb710_dump_regs(struct cb710_chip *chip, unsigned dump); | |
118 | #else | |
119 | #define cb710_dump_regs(c, d) do {} while (0) | |
120 | #endif | |
121 | ||
122 | #define CB710_DUMP_REGS_MMC 0x0F | |
123 | #define CB710_DUMP_REGS_MS 0x30 | |
124 | #define CB710_DUMP_REGS_SM 0xC0 | |
125 | #define CB710_DUMP_REGS_ALL 0xFF | |
126 | #define CB710_DUMP_REGS_MASK 0xFF | |
127 | ||
128 | #define CB710_DUMP_ACCESS_8 0x100 | |
129 | #define CB710_DUMP_ACCESS_16 0x200 | |
130 | #define CB710_DUMP_ACCESS_32 0x400 | |
131 | #define CB710_DUMP_ACCESS_ALL 0x700 | |
132 | #define CB710_DUMP_ACCESS_MASK 0x700 | |
133 | ||
134 | #endif /* LINUX_CB710_DRIVER_H */ | |
135 | /* | |
136 | * cb710/sgbuf2.h | |
137 | * | |
138 | * Copyright by Michał Mirosław, 2008-2009 | |
139 | * | |
140 | * This program is free software; you can redistribute it and/or modify | |
141 | * it under the terms of the GNU General Public License version 2 as | |
142 | * published by the Free Software Foundation. | |
143 | */ | |
144 | #ifndef LINUX_CB710_SG_H | |
145 | #define LINUX_CB710_SG_H | |
146 | ||
147 | #include <linux/highmem.h> | |
148 | #include <linux/scatterlist.h> | |
149 | ||
150 | /** | |
151 | * cb710_sg_miter_stop_writing - stop mapping iteration after writing | |
152 | * @miter: sg mapping iter to be stopped | |
153 | * | |
154 | * Description: | |
155 | * Stops mapping iterator @miter. @miter should have been started | |
156 | * started using sg_miter_start(). A stopped iteration can be | |
157 | * resumed by calling sg_miter_next() on it. This is useful when | |
158 | * resources (kmap) need to be released during iteration. | |
159 | * | |
160 | * This is a convenience wrapper that will be optimized out for arches | |
161 | * that don't need flush_kernel_dcache_page(). | |
162 | * | |
163 | * Context: | |
164 | * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. | |
165 | */ | |
166 | static inline void cb710_sg_miter_stop_writing(struct sg_mapping_iter *miter) | |
167 | { | |
168 | if (miter->page) | |
169 | flush_kernel_dcache_page(miter->page); | |
170 | sg_miter_stop(miter); | |
171 | } | |
172 | ||
173 | /* | |
174 | * 32-bit PIO mapping sg iterator | |
175 | * | |
176 | * Hides scatterlist access issues - fragment boundaries, alignment, page | |
177 | * mapping - for drivers using 32-bit-word-at-a-time-PIO (ie. PCI devices | |
178 | * without DMA support). | |
179 | * | |
180 | * Best-case reading (transfer from device): | |
181 | * sg_miter_start(); | |
182 | * cb710_sg_dwiter_write_from_io(); | |
183 | * cb710_sg_miter_stop_writing(); | |
184 | * | |
185 | * Best-case writing (transfer to device): | |
186 | * sg_miter_start(); | |
187 | * cb710_sg_dwiter_read_to_io(); | |
188 | * sg_miter_stop(); | |
189 | */ | |
190 | ||
191 | uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter); | |
192 | void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data); | |
193 | ||
194 | /** | |
195 | * cb710_sg_dwiter_write_from_io - transfer data to mapped buffer from 32-bit IO port | |
196 | * @miter: sg mapping iter | |
197 | * @port: PIO port - IO or MMIO address | |
198 | * @count: number of 32-bit words to transfer | |
199 | * | |
200 | * Description: | |
201 | * Reads @count 32-bit words from register @port and stores it in | |
202 | * buffer iterated by @miter. Data that would overflow the buffer | |
203 | * is silently ignored. Iterator is advanced by 4*@count bytes | |
204 | * or to the buffer's end whichever is closer. | |
205 | * | |
206 | * Context: | |
207 | * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. | |
208 | */ | |
209 | static inline void cb710_sg_dwiter_write_from_io(struct sg_mapping_iter *miter, | |
210 | void __iomem *port, size_t count) | |
211 | { | |
212 | while (count-- > 0) | |
213 | cb710_sg_dwiter_write_next_block(miter, ioread32(port)); | |
214 | } | |
215 | ||
216 | /** | |
217 | * cb710_sg_dwiter_read_to_io - transfer data to 32-bit IO port from mapped buffer | |
218 | * @miter: sg mapping iter | |
219 | * @port: PIO port - IO or MMIO address | |
220 | * @count: number of 32-bit words to transfer | |
221 | * | |
222 | * Description: | |
223 | * Writes @count 32-bit words to register @port from buffer iterated | |
224 | * through @miter. If buffer ends before @count words are written | |
225 | * missing data is replaced by zeroes. @miter is advanced by 4*@count | |
226 | * bytes or to the buffer's end whichever is closer. | |
227 | * | |
228 | * Context: | |
229 | * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. | |
230 | */ | |
231 | static inline void cb710_sg_dwiter_read_to_io(struct sg_mapping_iter *miter, | |
232 | void __iomem *port, size_t count) | |
233 | { | |
234 | while (count-- > 0) | |
235 | iowrite32(cb710_sg_dwiter_read_next_block(miter), port); | |
236 | } | |
237 | ||
238 | #endif /* LINUX_CB710_SG_H */ |