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8#include <common.h>
9#include <malloc.h>
10#include <spi.h>
11#include <spi_flash.h>
12
13#include "spi_flash_internal.h"
14
15int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
16{
17 unsigned long flags = SPI_XFER_BEGIN;
18 int ret;
19
20 if (len == 0)
21 flags |= SPI_XFER_END;
22
23 ret = spi_xfer(spi, 8, &cmd, NULL, flags);
24 if (ret) {
25 debug("SF: Failed to send command %02x: %d\n", cmd, ret);
26 return ret;
27 }
28
29 if (len) {
30 ret = spi_xfer(spi, len * 8, NULL, response, SPI_XFER_END);
31 if (ret)
32 debug("SF: Failed to read response (%zu bytes): %d\n",
33 len, ret);
34 }
35
36 return ret;
37}
38
39int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
40 size_t cmd_len, void *data, size_t data_len)
41{
42 unsigned long flags = SPI_XFER_BEGIN;
43 int ret;
44
45 if (data_len == 0)
46 flags |= SPI_XFER_END;
47
48 ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
49 if (ret) {
50 debug("SF: Failed to send read command (%zu bytes): %d\n",
51 cmd_len, ret);
52 } else if (data_len != 0) {
53 ret = spi_xfer(spi, data_len * 8, NULL, data, SPI_XFER_END);
54 if (ret)
55 debug("SF: Failed to read %zu bytes of data: %d\n",
56 data_len, ret);
57 }
58
59 return ret;
60}
61
62int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
63 const void *data, size_t data_len)
64{
65 unsigned long flags = SPI_XFER_BEGIN;
66 int ret;
67
68 if (data_len == 0)
69 flags |= SPI_XFER_END;
70
71 ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
72 if (ret) {
73 debug("SF: Failed to send read command (%zu bytes): %d\n",
74 cmd_len, ret);
75 } else if (data_len != 0) {
76 ret = spi_xfer(spi, data_len * 8, data, NULL, SPI_XFER_END);
77 if (ret)
78 debug("SF: Failed to read %zu bytes of data: %d\n",
79 data_len, ret);
80 }
81
82 return ret;
83}
84
85
86int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
87 size_t cmd_len, void *data, size_t data_len)
88{
89 struct spi_slave *spi = flash->spi;
90 int ret;
91
92 spi_claim_bus(spi);
93 ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
94 spi_release_bus(spi);
95
96 return ret;
97}
98
99struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
100 unsigned int max_hz, unsigned int spi_mode)
101{
102 struct spi_slave *spi;
103 struct spi_flash *flash;
104 int ret;
105 u8 idcode[5];
106
107 spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
108 if (!spi) {
109 debug("SF: Failed to set up slave\n");
110 return NULL;
111 }
112
113 ret = spi_claim_bus(spi);
114 if (ret) {
115 debug("SF: Failed to claim SPI bus: %d\n", ret);
116 goto err_claim_bus;
117 }
118
119
120 ret = spi_flash_cmd(spi, CMD_READ_ID, &idcode, sizeof(idcode));
121 if (ret)
122 goto err_read_id;
123
124 debug("SF: Got idcode %02x %02x %02x %02x %02x\n", idcode[0],
125 idcode[1], idcode[2], idcode[3], idcode[4]);
126
127 switch (idcode[0]) {
128#ifdef CONFIG_SPI_FLASH_SPANSION
129 case 0x01:
130 flash = spi_flash_probe_spansion(spi, idcode);
131 break;
132#endif
133#ifdef CONFIG_SPI_FLASH_ATMEL
134 case 0x1F:
135 flash = spi_flash_probe_atmel(spi, idcode);
136 break;
137#endif
138#ifdef CONFIG_SPI_FLASH_MACRONIX
139 case 0xc2:
140 flash = spi_flash_probe_macronix(spi, idcode);
141 break;
142#endif
143#ifdef CONFIG_SPI_FLASH_WINBOND
144 case 0xef:
145 flash = spi_flash_probe_winbond(spi, idcode);
146 break;
147#endif
148#ifdef CONFIG_SPI_FLASH_STMICRO
149 case 0x20:
150 flash = spi_flash_probe_stmicro(spi, idcode);
151 break;
152#endif
153#ifdef CONFIG_SPI_FLASH_SST
154 case 0xBF:
155 flash = spi_flash_probe_sst(spi, idcode);
156 break;
157#endif
158 default:
159 debug("SF: Unsupported manufacturer %02X\n", idcode[0]);
160 flash = NULL;
161 break;
162 }
163
164 if (!flash)
165 goto err_manufacturer_probe;
166
167 spi_release_bus(spi);
168
169 return flash;
170
171err_manufacturer_probe:
172err_read_id:
173 spi_release_bus(spi);
174err_claim_bus:
175 spi_free_slave(spi);
176 return NULL;
177}
178
179void spi_flash_free(struct spi_flash *flash)
180{
181 spi_free_slave(flash->spi);
182 free(flash);
183}
184
