RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity

drivers/mtd_spi_nor: add support for Microchip (SST) flash

Browse Source
This commit is contained in:
Benjamin Valentin 2022-02-03 21:30:46 +01:00 committed by Benjamin Valentin
parent a45a868651
commit 1795785a92
1 changed files with 31 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/mtd_spi_nor/mtd_spi_nor.c
View File

@ -45,6 +45,8 @@
#define SFLASH_CMD_4_BYTE_ADDR (0xB7) /**< enable 32 bit addressing */
#define SFLASH_CMD_3_BYTE_ADDR (0xE9) /**< enable 24 bit addressing */
#define SFLASH_CMD_ULBPR (0x98) /**< Global Block Protection Unlock */
#define MTD_64K (65536ul)
#define MTD_64K_ADDR_MASK (0xFFFF)
#define MTD_32K (32768ul)
@ -66,6 +68,7 @@
typedef enum {
SPI_NOR_JEDEC_ATMEL = 0x1F | JEDEC_BANK(1),
SPI_NOR_JEDEC_MICROCHIP = 0xBF | JEDEC_BANK(1),
} jedec_manuf_t;
/** @} */
@ -303,6 +306,28 @@ static uint32_t mtd_spi_nor_get_size(const mtd_jedec_id_t *id)
(id->device[1] & ~0x3) == 0) {
return (0x1F & id->device[0]) * MBIT_AS_BYTES;
}
if (mtd_spi_manuf_match(id, SPI_NOR_JEDEC_MICROCHIP)) {
switch (id->device[1]) {
case 0x12: /* SST26VF020A */
case 0x8c: /* SST25VF020B */
return 2 * MBIT_AS_BYTES;
case 0x54: /* SST26WF040B */
case 0x8d: /* SST25VF040B */
return 4 * MBIT_AS_BYTES;
case 0x58: /* SST26WF080B */
case 0x8e: /* SST25VF080B */
return 8 * MBIT_AS_BYTES;
case 0x1: /* SST26VF016 */
case 0x41: /* SST26VF016B */
return 16 * MBIT_AS_BYTES;
case 0x2: /* SST26VF032 */
case 0x42: /* SST26VF032B */
return 32 * MBIT_AS_BYTES;
case 0x43: /* SST26VF064B */
case 0x53: /* SST26WF064C */
return 64 * MBIT_AS_BYTES;
}
}
/* everyone else seems to use device ID 2 for density */
return 1 << id->device[1];
@ -463,10 +488,14 @@ static int mtd_spi_nor_init(mtd_dev_t *mtd)
uint8_t status;
mtd_spi_cmd_read(dev, dev->params->opcode->rdsr, &status, sizeof(status));
mtd_spi_release(dev);
DEBUG("mtd_spi_nor_init: device status = 0x%02x\n", (unsigned int)status);
/* Global Block-Protection Unlock */
mtd_spi_cmd(dev, dev->params->opcode->wren);
mtd_spi_cmd(dev, SFLASH_CMD_ULBPR);
mtd_spi_release(dev);
/* check whether page size and sector size are powers of two (most chips' are)
* and compute the number of shifts needed to get the page and sector addresses
* from a byte address */