1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * cb710/cb710.h
4 *
5 * Copyright by Michał Mirosław, 2008-2009
6 */
7 #ifndef LINUX_CB710_DRIVER_H
8 #define LINUX_CB710_DRIVER_H
9
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[];
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
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
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):
144 * sg_miter_start(, SG_MITER_TO_SG);
145 * cb710_sg_dwiter_write_from_io();
146 * sg_miter_stop();
147 *
148 * Best-case writing (transfer to device):
149 * sg_miter_start(, SG_MITER_FROM_SG);
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 */
202
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