spi_flash: support working on differnt buses and frequency

components/spi_flash/private_include/spi_flash_defs.h

@@ -0,0 +1,44 @@
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+/* SPI commands (actual on-wire commands not SPI controller bitmasks)
+   Suitable for use with spi_flash_hal_common_command static function.
+*/
+#define CMD_RDID       0x9F
+#define CMD_WRSR       0x01
+#define  SR_WIP        (1<<0) /* Status register write-in-progress bit */
+#define  SR_WREN       (1<<1) /* Status register write enable bit */
+#define CMD_WRSR2      0x31 /* Not all SPI flash uses this command */
+#define CMD_WREN       0x06
+#define CMD_WRDI       0x04
+#define CMD_RDSR       0x05
+#define CMD_RDSR2      0x35 /* Not all SPI flash uses this command */
+
+#define CMD_FASTRD_QIO  0xEB
+#define CMD_FASTRD_QUAD 0x6B
+#define CMD_FASTRD_DIO  0xBB
+#define CMD_FASTRD_DUAL 0x3B
+#define CMD_FASTRD      0x0B
+#define CMD_READ        0x03 /* Speed limited */
+
+#define CMD_CHIP_ERASE 0xC7
+#define CMD_SECTOR_ERASE 0x20
+#define CMD_LARGE_BLOCK_ERASE 0xD8 /* 64KB block erase command */
+
+#define CMD_RST_EN      0x66
+#define CMD_RST_DEV     0x99
+
+