100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* OMAP GPMC (General Purpose Memory Controller) defines
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*/
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#include <linux/platform_data/gpmc-omap.h>
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#define GPMC_CONFIG_WP 0x00000005
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/* IRQ numbers in GPMC IRQ domain for legacy boot use */
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#define GPMC_IRQ_FIFOEVENTENABLE 0
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#define GPMC_IRQ_COUNT_EVENT 1
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/**
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* gpmc_nand_ops - Interface between NAND and GPMC
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* @nand_write_buffer_empty: get the NAND write buffer empty status.
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*/
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struct gpmc_nand_ops {
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bool (*nand_writebuffer_empty)(void);
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};
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struct gpmc_nand_regs;
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struct gpmc_onenand_info {
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bool sync_read;
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bool sync_write;
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int burst_len;
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};
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#if IS_ENABLED(CONFIG_OMAP_GPMC)
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struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
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int cs);
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/**
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* gpmc_omap_onenand_set_timings - set optimized sync timings.
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* @cs: Chip Select Region
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* @freq: Chip frequency
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* @latency: Burst latency cycle count
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* @info: Structure describing parameters used
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*
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* Sets optimized timings for the @cs region based on @freq and @latency.
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* Updates the @info structure based on the GPMC settings.
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*/
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int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
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int latency,
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struct gpmc_onenand_info *info);
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#else
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static inline struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
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int cs)
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{
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return NULL;
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}
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static inline
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int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
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int latency,
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struct gpmc_onenand_info *info)
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{
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return -EINVAL;
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}
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#endif /* CONFIG_OMAP_GPMC */
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extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
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struct gpmc_settings *gpmc_s,
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struct gpmc_device_timings *dev_t);
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struct device_node;
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extern int gpmc_get_client_irq(unsigned irq_config);
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extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
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extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
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extern int gpmc_calc_divider(unsigned int sync_clk);
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extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
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const struct gpmc_settings *s);
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extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
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extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
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extern void gpmc_cs_free(int cs);
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extern int gpmc_configure(int cmd, int wval);
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extern void gpmc_read_settings_dt(struct device_node *np,
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struct gpmc_settings *p);
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extern void omap3_gpmc_save_context(void);
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extern void omap3_gpmc_restore_context(void);
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struct gpmc_timings;
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struct omap_nand_platform_data;
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struct omap_onenand_platform_data;
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#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
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extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
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#else
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#define board_onenand_data NULL
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static inline int gpmc_onenand_init(struct omap_onenand_platform_data *d)
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{
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return 0;
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}
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#endif
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