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0420872478
So far, the SPINAND_PAGE_READ_FROM_CACHE_OP macro was taking a first argument, "fast", which was inducing the possibility to support higher bus frequencies than with the normal (slower) read from cache alternative. In practice, without frequency change on the bus, this was likely without effect, besides perhaps allowing another variant of the same command, that could run at the default highest speed. If we want to support this fully, we need to add a frequency parameter to the slowest command. But before we do that, let's drop the "fast" boolean from the macro and duplicate it, this will further help supporting having different frequencies allowed for each variant. The change is also of course propagated to all users. It has the nice effect to have all macros aligned on the same pattern. Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 Jeff Kletsky
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*
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* Author: Jeff Kletsky <git-commits@allycomm.com>
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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_PARAGON 0xa1
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#define PN26G0XA_STATUS_ECC_BITMASK (3 << 4)
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#define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4)
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#define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4)
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#define PN26G0XA_STATUS_ECC_ERRORED (2 << 4)
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#define PN26G0XA_STATUS_ECC_8_CORRECTED (3 << 4)
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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_FAST_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(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 pn26g0xa_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 = 6 + (15 * section); /* 4 BBM + 2 user bytes */
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region->length = 13;
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return 0;
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}
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static int pn26g0xa_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 > 4)
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return -ERANGE;
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if (section == 4) {
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region->offset = 64;
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region->length = 64;
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} else {
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region->offset = 4 + (15 * section);
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region->length = 2;
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}
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return 0;
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}
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static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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switch (status & PN26G0XA_STATUS_ECC_BITMASK) {
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case PN26G0XA_STATUS_ECC_NONE_DETECTED:
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return 0;
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case PN26G0XA_STATUS_ECC_1_7_CORRECTED:
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return 7; /* Return upper limit by convention */
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case PN26G0XA_STATUS_ECC_8_CORRECTED:
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return 8;
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case PN26G0XA_STATUS_ECC_ERRORED:
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return -EBADMSG;
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default:
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break;
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}
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return -EINVAL;
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}
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static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {
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.ecc = pn26g0xa_ooblayout_ecc,
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.free = pn26g0xa_ooblayout_free,
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};
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static const struct spinand_info paragon_spinand_table[] = {
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SPINAND_INFO("PN26G01A",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe1),
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NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1),
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NAND_ECCREQ(8, 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(&pn26g0xa_ooblayout,
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pn26g0xa_ecc_get_status)),
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SPINAND_INFO("PN26G02A",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe2),
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NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1),
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NAND_ECCREQ(8, 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(&pn26g0xa_ooblayout,
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pn26g0xa_ecc_get_status)),
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};
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static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {
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};
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const struct spinand_manufacturer paragon_spinand_manufacturer = {
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.id = SPINAND_MFR_PARAGON,
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.name = "Paragon",
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.chips = paragon_spinand_table,
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.nchips = ARRAY_SIZE(paragon_spinand_table),
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.ops = ¶gon_spinand_manuf_ops,
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};
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