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1 | /* | |
2 | * Common SPI flash Interface | |
3 | * | |
4 | * Copyright (C) 2008 Atmel Corporation | |
5 | * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. | |
6 | * | |
7 | * See file CREDITS for list of people who contributed to this | |
8 | * project. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * version 2 as published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #ifndef _SPI_FLASH_H_ | |
16 | #define _SPI_FLASH_H_ | |
17 | ||
18 | #include <dm.h> /* Because we dereference struct udevice here */ | |
19 | #include <linux/types.h> | |
20 | ||
21 | #ifndef CONFIG_SF_DEFAULT_SPEED | |
22 | # define CONFIG_SF_DEFAULT_SPEED 1000000 | |
23 | #endif | |
24 | #ifndef CONFIG_SF_DEFAULT_MODE | |
25 | # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3 | |
26 | #endif | |
27 | #ifndef CONFIG_SF_DEFAULT_CS | |
28 | # define CONFIG_SF_DEFAULT_CS 0 | |
29 | #endif | |
30 | #ifndef CONFIG_SF_DEFAULT_BUS | |
31 | # define CONFIG_SF_DEFAULT_BUS 0 | |
32 | #endif | |
33 | ||
34 | struct spi_slave; | |
35 | ||
36 | /** | |
37 | * struct spi_flash - SPI flash structure | |
38 | * | |
39 | * @spi: SPI slave | |
40 | * @name: Name of SPI flash | |
41 | * @dual_flash: Indicates dual flash memories - dual stacked, parallel | |
42 | * @shift: Flash shift useful in dual parallel | |
43 | * @size: Total flash size | |
44 | * @page_size: Write (page) size | |
45 | * @sector_size: Sector size | |
46 | * @erase_size: Erase size | |
47 | * @bank_read_cmd: Bank read cmd | |
48 | * @bank_write_cmd: Bank write cmd | |
49 | * @bank_curr: Current flash bank | |
50 | * @poll_cmd: Poll cmd - for flash erase/program | |
51 | * @erase_cmd: Erase cmd 4K, 32K, 64K | |
52 | * @read_cmd: Read cmd - Array Fast, Extn read and quad read. | |
53 | * @write_cmd: Write cmd - page and quad program. | |
54 | * @dummy_byte: Dummy cycles for read operation. | |
55 | * @memory_map: Address of read-only SPI flash access | |
56 | * @read: Flash read ops: Read len bytes at offset into buf | |
57 | * Supported cmds: Fast Array Read | |
58 | * @write: Flash write ops: Write len bytes from buf into offset | |
59 | * Supported cmds: Page Program | |
60 | * @erase: Flash erase ops: Erase len bytes from offset | |
61 | * Supported cmds: Sector erase 4K, 32K, 64K | |
62 | * return 0 - Success, 1 - Failure | |
63 | */ | |
64 | struct spi_flash { | |
65 | struct spi_slave *spi; | |
66 | #ifdef CONFIG_DM_SPI_FLASH | |
67 | struct udevice *dev; | |
68 | u16 flags; | |
69 | #endif | |
70 | const char *name; | |
71 | u8 dual_flash; | |
72 | u8 shift; | |
73 | ||
74 | u32 size; | |
75 | u32 page_size; | |
76 | u32 sector_size; | |
77 | u32 erase_size; | |
78 | #ifdef CONFIG_SPI_FLASH_BAR | |
79 | u8 bank_read_cmd; | |
80 | u8 bank_write_cmd; | |
81 | u8 bank_curr; | |
82 | #endif | |
83 | u8 poll_cmd; | |
84 | u8 erase_cmd; | |
85 | u8 read_cmd; | |
86 | u8 write_cmd; | |
87 | u8 dummy_byte; | |
88 | ||
89 | void *memory_map; | |
90 | #ifndef CONFIG_DM_SPI_FLASH | |
91 | /* | |
92 | * These are not strictly needed for driver model, but keep them here | |
93 | * while the transition is in progress. | |
94 | * | |
95 | * Normally each driver would provide its own operations, but for | |
96 | * SPI flash most chips use the same algorithms. One approach is | |
97 | * to create a 'common' SPI flash device which knows how to talk | |
98 | * to most devices, and then allow other drivers to be used instead | |
99 | * if required, perhaps with a way of scanning through the list to | |
100 | * find the driver that matches the device. | |
101 | */ | |
102 | int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf); | |
103 | int (*write)(struct spi_flash *flash, u32 offset, size_t len, | |
104 | const void *buf); | |
105 | int (*erase)(struct spi_flash *flash, u32 offset, size_t len); | |
106 | #endif | |
107 | }; | |
108 | ||
109 | struct dm_spi_flash_ops { | |
110 | int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf); | |
111 | int (*write)(struct udevice *dev, u32 offset, size_t len, | |
112 | const void *buf); | |
113 | int (*erase)(struct udevice *dev, u32 offset, size_t len); | |
114 | }; | |
115 | ||
116 | /* Access the serial operations for a device */ | |
117 | #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops) | |
118 | ||
119 | #ifdef CONFIG_DM_SPI_FLASH | |
120 | /** | |
121 | * spi_flash_read_dm() - Read data from SPI flash | |
122 | * | |
123 | * @dev: SPI flash device | |
124 | * @offset: Offset into device in bytes to read from | |
125 | * @len: Number of bytes to read | |
126 | * @buf: Buffer to put the data that is read | |
127 | * @return 0 if OK, -ve on error | |
128 | */ | |
129 | int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf); | |
130 | ||
131 | /** | |
132 | * spi_flash_write_dm() - Write data to SPI flash | |
133 | * | |
134 | * @dev: SPI flash device | |
135 | * @offset: Offset into device in bytes to write to | |
136 | * @len: Number of bytes to write | |
137 | * @buf: Buffer containing bytes to write | |
138 | * @return 0 if OK, -ve on error | |
139 | */ | |
140 | int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len, | |
141 | const void *buf); | |
142 | ||
143 | /** | |
144 | * spi_flash_erase_dm() - Erase blocks of the SPI flash | |
145 | * | |
146 | * Note that @len must be a muiltiple of the flash sector size. | |
147 | * | |
148 | * @dev: SPI flash device | |
149 | * @offset: Offset into device in bytes to start erasing | |
150 | * @len: Number of bytes to erase | |
151 | * @return 0 if OK, -ve on error | |
152 | */ | |
153 | int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len); | |
154 | ||
155 | int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs, | |
156 | unsigned int max_hz, unsigned int spi_mode, | |
157 | struct udevice **devp); | |
158 | ||
159 | /* Compatibility function - this is the old U-Boot API */ | |
160 | struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, | |
161 | unsigned int max_hz, unsigned int spi_mode); | |
162 | ||
163 | /* Compatibility function - this is the old U-Boot API */ | |
164 | void spi_flash_free(struct spi_flash *flash); | |
165 | ||
166 | int spi_flash_remove(struct udevice *flash); | |
167 | ||
168 | static inline int spi_flash_read(struct spi_flash *flash, u32 offset, | |
169 | size_t len, void *buf) | |
170 | { | |
171 | return spi_flash_read_dm(flash->dev, offset, len, buf); | |
172 | } | |
173 | ||
174 | static inline int spi_flash_write(struct spi_flash *flash, u32 offset, | |
175 | size_t len, const void *buf) | |
176 | { | |
177 | return spi_flash_write_dm(flash->dev, offset, len, buf); | |
178 | } | |
179 | ||
180 | static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, | |
181 | size_t len) | |
182 | { | |
183 | return spi_flash_erase_dm(flash->dev, offset, len); | |
184 | } | |
185 | ||
186 | struct sandbox_state; | |
187 | ||
188 | int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs, | |
189 | struct udevice *bus, int of_offset, const char *spec); | |
190 | ||
191 | void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs); | |
192 | ||
193 | #else | |
194 | struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, | |
195 | unsigned int max_hz, unsigned int spi_mode); | |
196 | ||
197 | /** | |
198 | * Set up a new SPI flash from an fdt node | |
199 | * | |
200 | * @param blob Device tree blob | |
201 | * @param slave_node Pointer to this SPI slave node in the device tree | |
202 | * @param spi_node Cached pointer to the SPI interface this node belongs | |
203 | * to | |
204 | * @return 0 if ok, -1 on error | |
205 | */ | |
206 | struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node, | |
207 | int spi_node); | |
208 | ||
209 | void spi_flash_free(struct spi_flash *flash); | |
210 | ||
211 | static inline int spi_flash_read(struct spi_flash *flash, u32 offset, | |
212 | size_t len, void *buf) | |
213 | { | |
214 | return flash->read(flash, offset, len, buf); | |
215 | } | |
216 | ||
217 | static inline int spi_flash_write(struct spi_flash *flash, u32 offset, | |
218 | size_t len, const void *buf) | |
219 | { | |
220 | return flash->write(flash, offset, len, buf); | |
221 | } | |
222 | ||
223 | static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, | |
224 | size_t len) | |
225 | { | |
226 | return flash->erase(flash, offset, len); | |
227 | } | |
228 | #endif | |
229 | ||
230 | void spi_boot(void) __noreturn; | |
231 | void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst); | |
232 | ||
233 | #endif /* _SPI_FLASH_H_ */ |