// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2017 Free Electrons * Copyright (C) 2017 NextThing Co * * Author: Boris Brezillon <[email protected]> */ #include <linux/sizes.h> #include <linux/slab.h> #include "internals.h" #define NAND_HYNIX_CMD_SET_PARAMS … #define NAND_HYNIX_CMD_APPLY_PARAMS … #define NAND_HYNIX_1XNM_RR_REPEAT … /** * struct hynix_read_retry - read-retry data * @nregs: number of register to set when applying a new read-retry mode * @regs: register offsets (NAND chip dependent) * @values: array of values to set in registers. The array size is equal to * (nregs * nmodes) */ struct hynix_read_retry { … }; /** * struct hynix_nand - private Hynix NAND struct * @read_retry: read-retry information */ struct hynix_nand { … }; /** * struct hynix_read_retry_otp - structure describing how the read-retry OTP * area * @nregs: number of hynix private registers to set before reading the reading * the OTP area * @regs: registers that should be configured * @values: values that should be set in regs * @page: the address to pass to the READ_PAGE command. Depends on the NAND * chip * @size: size of the read-retry OTP section */ struct hynix_read_retry_otp { … }; static bool hynix_nand_has_valid_jedecid(struct nand_chip *chip) { … } static int hynix_nand_cmd_op(struct nand_chip *chip, u8 cmd) { … } static int hynix_nand_reg_write_op(struct nand_chip *chip, u8 addr, u8 val) { … } static int hynix_nand_setup_read_retry(struct nand_chip *chip, int retry_mode) { … } /** * hynix_get_majority - get the value that is occurring the most in a given * set of values * @in: the array of values to test * @repeat: the size of the in array * @out: pointer used to store the output value * * This function implements the 'majority check' logic that is supposed to * overcome the unreliability of MLC NANDs when reading the OTP area storing * the read-retry parameters. * * It's based on a pretty simple assumption: if we repeat the same value * several times and then take the one that is occurring the most, we should * find the correct value. * Let's hope this dummy algorithm prevents us from losing the read-retry * parameters. */ static int hynix_get_majority(const u8 *in, int repeat, u8 *out) { … } static int hynix_read_rr_otp(struct nand_chip *chip, const struct hynix_read_retry_otp *info, void *buf) { … } #define NAND_HYNIX_1XNM_RR_COUNT_OFFS … #define NAND_HYNIX_1XNM_RR_REG_COUNT_OFFS … #define NAND_HYNIX_1XNM_RR_SET_OFFS(x, setsize, inv) … static int hynix_mlc_1xnm_rr_value(const u8 *buf, int nmodes, int nregs, int mode, int reg, bool inv, u8 *val) { … } static u8 hynix_1xnm_mlc_read_retry_regs[] = …; static int hynix_mlc_1xnm_rr_init(struct nand_chip *chip, const struct hynix_read_retry_otp *info) { … } static const u8 hynix_mlc_1xnm_rr_otp_regs[] = …; static const u8 hynix_mlc_1xnm_rr_otp_values[] = …; static const struct hynix_read_retry_otp hynix_mlc_1xnm_rr_otps[] = …; static int hynix_nand_rr_init(struct nand_chip *chip) { … } static void hynix_nand_extract_oobsize(struct nand_chip *chip, bool valid_jedecid) { … } static void hynix_nand_extract_ecc_requirements(struct nand_chip *chip, bool valid_jedecid) { … } static void hynix_nand_extract_scrambling_requirements(struct nand_chip *chip, bool valid_jedecid) { … } static void hynix_nand_decode_id(struct nand_chip *chip) { … } static void hynix_nand_cleanup(struct nand_chip *chip) { … } static int h27ucg8t2atrbc_choose_interface_config(struct nand_chip *chip, struct nand_interface_config *iface) { … } static int h27ucg8t2etrbc_init(struct nand_chip *chip) { … } static int hynix_nand_init(struct nand_chip *chip) { … } static void hynix_fixup_onfi_param_page(struct nand_chip *chip, struct nand_onfi_params *p) { … } const struct nand_manufacturer_ops hynix_nand_manuf_ops = …;
Codebase Browser
linux