// SPDX-License-Identifier: GPL-2.0-only /* * JZ4780 NAND/external memory controller (NEMC) * * Copyright (c) 2015 Imagination Technologies * Author: Alex Smith <[email protected]> */ #include <linux/clk.h> #include <linux/init.h> #include <linux/io.h> #include <linux/math64.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/jz4780-nemc.h> #define NEMC_SMCRn(n) … #define NEMC_NFCSR … #define NEMC_REG_LEN … #define NEMC_SMCR_SMT … #define NEMC_SMCR_BW_SHIFT … #define NEMC_SMCR_BW_MASK … #define NEMC_SMCR_BW_8 … #define NEMC_SMCR_TAS_SHIFT … #define NEMC_SMCR_TAS_MASK … #define NEMC_SMCR_TAH_SHIFT … #define NEMC_SMCR_TAH_MASK … #define NEMC_SMCR_TBP_SHIFT … #define NEMC_SMCR_TBP_MASK … #define NEMC_SMCR_TAW_SHIFT … #define NEMC_SMCR_TAW_MASK … #define NEMC_SMCR_TSTRV_SHIFT … #define NEMC_SMCR_TSTRV_MASK … #define NEMC_NFCSR_NFEn(n) … #define NEMC_NFCSR_NFCEn(n) … #define NEMC_NFCSR_TNFEn(n) … struct jz_soc_info { … }; struct jz4780_nemc { … }; /** * jz4780_nemc_num_banks() - count the number of banks referenced by a device * @dev: device to count banks for, must be a child of the NEMC. * * Return: The number of unique NEMC banks referred to by the specified NEMC * child device. Unique here means that a device that references the same bank * multiple times in its "reg" property will only count once. */ unsigned int jz4780_nemc_num_banks(struct device *dev) { … } EXPORT_SYMBOL(…); /** * jz4780_nemc_set_type() - set the type of device connected to a bank * @dev: child device of the NEMC. * @bank: bank number to configure. * @type: type of device connected to the bank. */ void jz4780_nemc_set_type(struct device *dev, unsigned int bank, enum jz4780_nemc_bank_type type) { … } EXPORT_SYMBOL(…); /** * jz4780_nemc_assert() - (de-)assert a NAND device's chip enable pin * @dev: child device of the NEMC. * @bank: bank number of device. * @assert: whether the chip enable pin should be asserted. * * (De-)asserts the chip enable pin for the NAND device connected to the * specified bank. */ void jz4780_nemc_assert(struct device *dev, unsigned int bank, bool assert) { … } EXPORT_SYMBOL(…); static uint32_t jz4780_nemc_clk_period(struct jz4780_nemc *nemc) { … } static uint32_t jz4780_nemc_ns_to_cycles(struct jz4780_nemc *nemc, uint32_t ns) { … } static bool jz4780_nemc_configure_bank(struct jz4780_nemc *nemc, unsigned int bank, struct device_node *node) { … } static int jz4780_nemc_probe(struct platform_device *pdev) { … } static void jz4780_nemc_remove(struct platform_device *pdev) { … } static const struct jz_soc_info jz4740_soc_info = …; static const struct jz_soc_info jz4780_soc_info = …; static const struct of_device_id jz4780_nemc_dt_match[] = …; static struct platform_driver jz4780_nemc_driver = …; static int __init jz4780_nemc_init(void) { … } subsys_initcall(jz4780_nemc_init);
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