4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
6 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
8 * SPDX-License-Identifier: GPL-2.0+
16 #include <spi_flash.h>
18 #include "sf_internal.h"
21 * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
23 * @flashp: Pointer to place to put flash info, which may be NULL if the
24 * space should be allocated
26 static int spi_flash_probe_slave(struct spi_flash
*flash
)
28 struct spi_slave
*spi
= flash
->spi
;
33 printf("SF: Failed to set up slave\n");
38 ret
= spi_claim_bus(spi
);
40 debug("SF: Failed to claim SPI bus: %d\n", ret
);
44 ret
= spi_flash_scan(flash
);
48 #ifdef CONFIG_SPI_FLASH_MTD
49 ret
= spi_flash_mtd_register(flash
);
57 #ifndef CONFIG_DM_SPI_FLASH
58 struct spi_flash
*spi_flash_probe(unsigned int busnum
, unsigned int cs
,
59 unsigned int max_hz
, unsigned int spi_mode
)
61 struct spi_slave
*bus
;
62 struct spi_flash
*flash
;
64 bus
= spi_setup_slave(busnum
, cs
, max_hz
, spi_mode
);
68 /* Allocate space if needed (not used by sf-uclass */
69 flash
= calloc(1, sizeof(*flash
));
71 debug("SF: Failed to allocate spi_flash\n");
76 if (spi_flash_probe_slave(flash
)) {
85 void spi_flash_free(struct spi_flash
*flash
)
87 #ifdef CONFIG_SPI_FLASH_MTD
88 spi_flash_mtd_unregister();
90 spi_free_slave(flash
->spi
);
94 #else /* defined CONFIG_DM_SPI_FLASH */
96 static int spi_flash_std_read(struct udevice
*dev
, u32 offset
, size_t len
,
99 struct spi_flash
*flash
= dev_get_uclass_priv(dev
);
101 return spi_flash_cmd_read_ops(flash
, offset
, len
, buf
);
104 static int spi_flash_std_write(struct udevice
*dev
, u32 offset
, size_t len
,
107 struct spi_flash
*flash
= dev_get_uclass_priv(dev
);
109 #if defined(CONFIG_SPI_FLASH_SST)
110 if (flash
->flags
& SNOR_F_SST_WR
) {
111 if (flash
->spi
->mode
& SPI_TX_BYTE
)
112 return sst_write_bp(flash
, offset
, len
, buf
);
114 return sst_write_wp(flash
, offset
, len
, buf
);
118 return spi_flash_cmd_write_ops(flash
, offset
, len
, buf
);
121 static int spi_flash_std_erase(struct udevice
*dev
, u32 offset
, size_t len
)
123 struct spi_flash
*flash
= dev_get_uclass_priv(dev
);
125 return spi_flash_cmd_erase_ops(flash
, offset
, len
);
128 static int spi_flash_std_probe(struct udevice
*dev
)
130 struct spi_slave
*slave
= dev_get_parent_priv(dev
);
131 struct dm_spi_slave_platdata
*plat
= dev_get_parent_platdata(dev
);
132 struct spi_flash
*flash
;
134 flash
= dev_get_uclass_priv(dev
);
137 debug("%s: slave=%p, cs=%d\n", __func__
, slave
, plat
->cs
);
138 return spi_flash_probe_slave(flash
);
141 static const struct dm_spi_flash_ops spi_flash_std_ops
= {
142 .read
= spi_flash_std_read
,
143 .write
= spi_flash_std_write
,
144 .erase
= spi_flash_std_erase
,
147 static const struct udevice_id spi_flash_std_ids
[] = {
148 { .compatible
= "spi-flash" },
152 U_BOOT_DRIVER(spi_flash_std
) = {
153 .name
= "spi_flash_std",
154 .id
= UCLASS_SPI_FLASH
,
155 .of_match
= spi_flash_std_ids
,
156 .probe
= spi_flash_std_probe
,
157 .priv_auto_alloc_size
= sizeof(struct spi_flash
),
158 .ops
= &spi_flash_std_ops
,
161 #endif /* CONFIG_DM_SPI_FLASH */