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127 lines
3.4 KiB
127 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (c) 2017 exceet electronics GmbH |
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* |
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* Authors: |
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* Frieder Schrempf <[email protected]> |
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* Boris Brezillon <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/kernel.h> |
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#include <linux/mtd/spinand.h> |
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#define SPINAND_MFR_WINBOND 0xEF |
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#define WINBOND_CFG_BUF_READ BIT(3) |
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static SPINAND_OP_VARIANTS(read_cache_variants, |
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SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), |
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SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); |
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static SPINAND_OP_VARIANTS(write_cache_variants, |
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SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), |
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SPINAND_PROG_LOAD(true, 0, NULL, 0)); |
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static SPINAND_OP_VARIANTS(update_cache_variants, |
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SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), |
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SPINAND_PROG_LOAD(false, 0, NULL, 0)); |
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static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section, |
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struct mtd_oob_region *region) |
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{ |
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if (section > 3) |
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return -ERANGE; |
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region->offset = (16 * section) + 8; |
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region->length = 8; |
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return 0; |
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} |
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static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section, |
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struct mtd_oob_region *region) |
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{ |
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if (section > 3) |
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return -ERANGE; |
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region->offset = (16 * section) + 2; |
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region->length = 6; |
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return 0; |
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} |
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static const struct mtd_ooblayout_ops w25m02gv_ooblayout = { |
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.ecc = w25m02gv_ooblayout_ecc, |
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.free = w25m02gv_ooblayout_free, |
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}; |
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static int w25m02gv_select_target(struct spinand_device *spinand, |
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unsigned int target) |
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{ |
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struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1), |
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SPI_MEM_OP_NO_ADDR, |
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SPI_MEM_OP_NO_DUMMY, |
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SPI_MEM_OP_DATA_OUT(1, |
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spinand->scratchbuf, |
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1)); |
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*spinand->scratchbuf = target; |
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return spi_mem_exec_op(spinand->spimem, &op); |
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} |
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static const struct spinand_info winbond_spinand_table[] = { |
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SPINAND_INFO("W25M02GV", |
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab), |
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NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 2), |
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NAND_ECCREQ(1, 512), |
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SPINAND_INFO_OP_VARIANTS(&read_cache_variants, |
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&write_cache_variants, |
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&update_cache_variants), |
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0, |
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SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL), |
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SPINAND_SELECT_TARGET(w25m02gv_select_target)), |
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SPINAND_INFO("W25N01GV", |
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa), |
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NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), |
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NAND_ECCREQ(1, 512), |
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SPINAND_INFO_OP_VARIANTS(&read_cache_variants, |
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&write_cache_variants, |
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&update_cache_variants), |
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0, |
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SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)), |
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}; |
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static int winbond_spinand_init(struct spinand_device *spinand) |
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{ |
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struct nand_device *nand = spinand_to_nand(spinand); |
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unsigned int i; |
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/* |
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* Make sure all dies are in buffer read mode and not continuous read |
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* mode. |
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*/ |
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for (i = 0; i < nand->memorg.ntargets; i++) { |
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spinand_select_target(spinand, i); |
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spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ, |
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WINBOND_CFG_BUF_READ); |
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} |
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return 0; |
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} |
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static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = { |
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.init = winbond_spinand_init, |
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}; |
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const struct spinand_manufacturer winbond_spinand_manufacturer = { |
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.id = SPINAND_MFR_WINBOND, |
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.name = "Winbond", |
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.chips = winbond_spinand_table, |
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.nchips = ARRAY_SIZE(winbond_spinand_table), |
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.ops = &winbond_spinand_manuf_ops, |
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};
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