diff options
Diffstat (limited to 'drivers/mtd/spi-nor/xilinx.c')
| -rw-r--r-- | drivers/mtd/spi-nor/xilinx.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/drivers/mtd/spi-nor/xilinx.c b/drivers/mtd/spi-nor/xilinx.c deleted file mode 100644 index f99118c691b0..000000000000 --- a/drivers/mtd/spi-nor/xilinx.c +++ /dev/null @@ -1,169 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2005, Intec Automation Inc. - * Copyright (C) 2014, Freescale Semiconductor, Inc. - */ - -#include <linux/mtd/spi-nor.h> - -#include "core.h" - -#define XILINX_OP_SE 0x50 /* Sector erase */ -#define XILINX_OP_PP 0x82 /* Page program */ -#define XILINX_OP_RDSR 0xd7 /* Read status register */ - -#define XSR_PAGESIZE BIT(0) /* Page size in Po2 or Linear */ -#define XSR_RDY BIT(7) /* Ready */ - -#define XILINX_RDSR_OP(buf) \ - SPI_MEM_OP(SPI_MEM_OP_CMD(XILINX_OP_RDSR, 0), \ - SPI_MEM_OP_NO_ADDR, \ - SPI_MEM_OP_NO_DUMMY, \ - SPI_MEM_OP_DATA_IN(1, buf, 0)) - -#define S3AN_FLASH(_id, _name, _n_sectors, _page_size) \ - .id = _id, \ - .name = _name, \ - .size = 8 * (_page_size) * (_n_sectors), \ - .sector_size = (8 * (_page_size)), \ - .page_size = (_page_size), \ - .flags = SPI_NOR_NO_FR - -/* Xilinx S3AN share MFR with Atmel SPI NOR */ -static const struct flash_info xilinx_nor_parts[] = { - /* Xilinx S3AN Internal Flash */ - { S3AN_FLASH(SNOR_ID(0x1f, 0x22, 0x00), "3S50AN", 64, 264) }, - { S3AN_FLASH(SNOR_ID(0x1f, 0x24, 0x00), "3S200AN", 256, 264) }, - { S3AN_FLASH(SNOR_ID(0x1f, 0x24, 0x00), "3S400AN", 256, 264) }, - { S3AN_FLASH(SNOR_ID(0x1f, 0x25, 0x00), "3S700AN", 512, 264) }, - { S3AN_FLASH(SNOR_ID(0x1f, 0x26, 0x00), "3S1400AN", 512, 528) }, -}; - -/* - * This code converts an address to the Default Address Mode, that has non - * power of two page sizes. We must support this mode because it is the default - * mode supported by Xilinx tools, it can access the whole flash area and - * changing over to the Power-of-two mode is irreversible and corrupts the - * original data. - * Addr can safely be unsigned int, the biggest S3AN device is smaller than - * 4 MiB. - */ -static u32 s3an_nor_convert_addr(struct spi_nor *nor, u32 addr) -{ - u32 page_size = nor->params->page_size; - u32 offset, page; - - offset = addr % page_size; - page = addr / page_size; - page <<= (page_size > 512) ? 10 : 9; - - return page | offset; -} - -/** - * xilinx_nor_read_sr() - Read the Status Register on S3AN flashes. - * @nor: pointer to 'struct spi_nor'. - * @sr: pointer to a DMA-able buffer where the value of the - * Status Register will be written. - * - * Return: 0 on success, -errno otherwise. - */ -static int xilinx_nor_read_sr(struct spi_nor *nor, u8 *sr) -{ - int ret; - - if (nor->spimem) { - struct spi_mem_op op = XILINX_RDSR_OP(sr); - - spi_nor_spimem_setup_op(nor, &op, nor->reg_proto); - - ret = spi_mem_exec_op(nor->spimem, &op); - } else { - ret = spi_nor_controller_ops_read_reg(nor, XILINX_OP_RDSR, sr, - 1); - } - - if (ret) - dev_dbg(nor->dev, "error %d reading SR\n", ret); - - return ret; -} - -/** - * xilinx_nor_sr_ready() - Query the Status Register of the S3AN flash to see - * if the flash is ready for new commands. - * @nor: pointer to 'struct spi_nor'. - * - * Return: 1 if ready, 0 if not ready, -errno on errors. - */ -static int xilinx_nor_sr_ready(struct spi_nor *nor) -{ - int ret; - - ret = xilinx_nor_read_sr(nor, nor->bouncebuf); - if (ret) - return ret; - - return !!(nor->bouncebuf[0] & XSR_RDY); -} - -static int xilinx_nor_setup(struct spi_nor *nor, - const struct spi_nor_hwcaps *hwcaps) -{ - u32 page_size; - int ret; - - ret = xilinx_nor_read_sr(nor, nor->bouncebuf); - if (ret) - return ret; - - nor->erase_opcode = XILINX_OP_SE; - nor->program_opcode = XILINX_OP_PP; - nor->read_opcode = SPINOR_OP_READ; - nor->flags |= SNOR_F_NO_OP_CHIP_ERASE; - - /* - * This flashes have a page size of 264 or 528 bytes (known as - * Default addressing mode). It can be changed to a more standard - * Power of two mode where the page size is 256/512. This comes - * with a price: there is 3% less of space, the data is corrupted - * and the page size cannot be changed back to default addressing - * mode. - * - * The current addressing mode can be read from the XRDSR register - * and should not be changed, because is a destructive operation. - */ - if (nor->bouncebuf[0] & XSR_PAGESIZE) { - /* Flash in Power of 2 mode */ - page_size = (nor->params->page_size == 264) ? 256 : 512; - nor->params->page_size = page_size; - nor->mtd.writebufsize = page_size; - nor->params->size = nor->info->size; - nor->mtd.erasesize = 8 * page_size; - } else { - /* Flash in Default addressing mode */ - nor->params->convert_addr = s3an_nor_convert_addr; - nor->mtd.erasesize = nor->info->sector_size; - } - - return 0; -} - -static int xilinx_nor_late_init(struct spi_nor *nor) -{ - nor->params->setup = xilinx_nor_setup; - nor->params->ready = xilinx_nor_sr_ready; - - return 0; -} - -static const struct spi_nor_fixups xilinx_nor_fixups = { - .late_init = xilinx_nor_late_init, -}; - -const struct spi_nor_manufacturer spi_nor_xilinx = { - .name = "xilinx", - .parts = xilinx_nor_parts, - .nparts = ARRAY_SIZE(xilinx_nor_parts), - .fixups = &xilinx_nor_fixups, -}; |