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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>
154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Author: Mario Kicherer <dev@kicherer.org>
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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_ALLIANCEMEMORY 0x52
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#define AM_STATUS_ECC_BITMASK (3 << 4)
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#define AM_STATUS_ECC_NONE_DETECTED (0 << 4)
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#define AM_STATUS_ECC_CORRECTED (1 << 4)
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#define AM_STATUS_ECC_ERRORED (2 << 4)
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#define AM_STATUS_ECC_MAX_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, 1, 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 am_get_eccsize(struct mtd_info *mtd)
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{
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if (mtd->oobsize == 64)
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return 0x20;
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else if (mtd->oobsize == 128)
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return 0x38;
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else if (mtd->oobsize == 256)
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return 0x70;
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else
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return -EINVAL;
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}
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static int am_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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int ecc_bytes;
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ecc_bytes = am_get_eccsize(mtd);
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if (ecc_bytes < 0)
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return ecc_bytes;
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region->offset = mtd->oobsize - ecc_bytes;
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region->length = ecc_bytes;
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return 0;
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}
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static int am_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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int ecc_bytes;
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if (section)
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return -ERANGE;
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ecc_bytes = am_get_eccsize(mtd);
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if (ecc_bytes < 0)
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return ecc_bytes;
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/*
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* It is unclear how many bytes are used for the bad block marker. We
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* reserve the common two bytes here.
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*
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* The free area in this kind of flash is divided into chunks where the
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* first 4 bytes of each chunk are unprotected. The number of chunks
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* depends on the specific model. The models with 4096+256 bytes pages
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* have 8 chunks, the others 4 chunks.
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*/
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region->offset = 2;
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region->length = mtd->oobsize - 2 - ecc_bytes;
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return 0;
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}
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static const struct mtd_ooblayout_ops am_ooblayout = {
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.ecc = am_ooblayout_ecc,
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.free = am_ooblayout_free,
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};
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static int am_ecc_get_status(struct spinand_device *spinand, u8 status)
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{
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switch (status & AM_STATUS_ECC_BITMASK) {
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case AM_STATUS_ECC_NONE_DETECTED:
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return 0;
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case AM_STATUS_ECC_CORRECTED:
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/*
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* use oobsize to determine the flash model and the maximum of
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* correctable errors and return maximum - 1 by convention
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*/
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if (spinand->base.mtd.oobsize == 64)
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return 3;
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else
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return 7;
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case AM_STATUS_ECC_ERRORED:
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return -EBADMSG;
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case AM_STATUS_ECC_MAX_CORRECTED:
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/*
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* use oobsize to determine the flash model and the maximum of
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* correctable errors
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*/
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if (spinand->base.mtd.oobsize == 64)
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return 4;
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else
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return 8;
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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 spinand_info alliancememory_spinand_table[] = {
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SPINAND_INFO("AS5F34G04SND",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x2f),
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NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 1, 1, 1),
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NAND_ECCREQ(4, 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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SPINAND_HAS_QE_BIT,
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SPINAND_ECCINFO(&am_ooblayout,
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am_ecc_get_status)),
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};
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static const struct spinand_manufacturer_ops alliancememory_spinand_manuf_ops = {
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};
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const struct spinand_manufacturer alliancememory_spinand_manufacturer = {
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.id = SPINAND_MFR_ALLIANCEMEMORY,
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.name = "AllianceMemory",
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.chips = alliancememory_spinand_table,
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.nchips = ARRAY_SIZE(alliancememory_spinand_table),
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.ops = &alliancememory_spinand_manuf_ops,
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};
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