dev/i2c/spi-flash-m25p40.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * SPI driver for M25P40 like spi flash device.
0005  */
0006
0007 /*
0008  * Copyright (c) 2007 embedded brains GmbH & Co. KG
0009  *
0010  * Redistribution and use in source and binary forms, with or without
0011  * modification, are permitted provided that the following conditions
0012  * are met:
0013  * 1. Redistributions of source code must retain the above copyright
0014  *    notice, this list of conditions and the following disclaimer.
0015  * 2. Redistributions in binary form must reproduce the above copyright
0016  *    notice, this list of conditions and the following disclaimer in the
0017  *    documentation and/or other materials provided with the distribution.
0018  *
0019  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0020  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0021  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0022  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0023  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0024  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0025  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0026  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0027  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0028  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0029  * POSSIBILITY OF SUCH DAMAGE.
0030  */
0031
0032 #include <rtems.h>
0033 #include <rtems/libi2c.h>
0034
0035 #include <libchip/spi-flash-m25p40.h>
0036 #include <rtems/libio.h>
0037
0038
0039 static spi_memdrv_t spi_flash_m25p40_rw_drv_t = {
0040   {/* public fields */
0041     .ops =         &spi_memdrv_rw_ops, /* operations of general memdrv */
0042     .size =        sizeof (spi_flash_m25p40_rw_drv_t),
0043   },
0044   { /* our private fields */
0045     .baudrate =             2000000,
0046     .erase_before_program = true,
0047     .empty_state =          0xff,
0048     .page_size =            256,     /* programming page size in bytes */
0049     .sector_size =          0x10000, /* 64K - erase sector size in bytes */
0050     .mem_size =             0x80000, /* 512K - total capacity in bytes */
0051   }
0052 };
0053
0054 rtems_libi2c_drv_t *spi_flash_m25p40_rw_driver_descriptor =
0055 &spi_flash_m25p40_rw_drv_t.libi2c_drv_entry;
0056
0057 static spi_memdrv_t spi_flash_m25p40_ro_drv_t = {
0058   {/* public fields */
0059     .ops =         &spi_memdrv_ro_ops, /* operations of general memdrv */
0060     .size =        sizeof (spi_flash_m25p40_ro_drv_t),
0061   },
0062   { /* our private fields */
0063     .baudrate =             2000000,
0064     .erase_before_program = true,
0065     .empty_state =          0xff,
0066     .page_size =            256,    /* programming page size in bytes */
0067     .sector_size =          0x10000, /* 64K erase sector size in bytes */
0068     .mem_size =             0x80000, /* 512K total capacity in bytes */
0069   }
0070 };
0071
0072 rtems_libi2c_drv_t *spi_flash_m25p40_ro_driver_descriptor =
0073 &spi_flash_m25p40_ro_drv_t.libi2c_drv_entry;