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