LXR linux/include/linux/omap-gpmc.h

   1/*
   2 *  OMAP GPMC (General Purpose Memory Controller) defines
   3 *
   4 *  This program is free software; you can redistribute  it and/or modify it
   5 *  under  the terms of  the GNU General  Public License as published by the
   6 *  Free Software Foundation;  either version 2 of the  License, or (at your
   7 *  option) any later version.
   8 */
   9
  10#include <linux/platform_data/gpmc-omap.h>
  11
  12#define GPMC_CONFIG_WP          0x00000005
  13
  14/* IRQ numbers in GPMC IRQ domain for legacy boot use */
  15#define GPMC_IRQ_FIFOEVENTENABLE        0
  16#define GPMC_IRQ_COUNT_EVENT            1
  17
  18/**
  19 * gpmc_nand_ops - Interface between NAND and GPMC
  20 * @nand_write_buffer_empty: get the NAND write buffer empty status.
  21 */
  22struct gpmc_nand_ops {
  23        bool (*nand_writebuffer_empty)(void);
  24};
  25
  26struct gpmc_nand_regs;
  27
  28#if IS_ENABLED(CONFIG_OMAP_GPMC)
  29struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
  30                                             int cs);
  31#else
  32static inline struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
  33                                                           int cs)
  34{
  35        return NULL;
  36}
  37#endif /* CONFIG_OMAP_GPMC */
  38
  39/*--------------------------------*/
  40
  41/* deprecated APIs */
  42#if IS_ENABLED(CONFIG_OMAP_GPMC)
  43void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
  44#else
  45static inline void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
  46{
  47}
  48#endif /* CONFIG_OMAP_GPMC */
  49/*--------------------------------*/
  50
  51extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
  52                             struct gpmc_settings *gpmc_s,
  53                             struct gpmc_device_timings *dev_t);
  54
  55struct device_node;
  56
  57extern int gpmc_get_client_irq(unsigned irq_config);
  58
  59extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
  60
  61extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
  62extern int gpmc_calc_divider(unsigned int sync_clk);
  63extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
  64                               const struct gpmc_settings *s);
  65extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
  66extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
  67extern void gpmc_cs_free(int cs);
  68extern int gpmc_configure(int cmd, int wval);
  69extern void gpmc_read_settings_dt(struct device_node *np,
  70                                  struct gpmc_settings *p);
  71
  72extern void omap3_gpmc_save_context(void);
  73extern void omap3_gpmc_restore_context(void);
  74
  75struct gpmc_timings;
  76struct omap_nand_platform_data;
  77struct omap_onenand_platform_data;
  78
  79#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
  80extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
  81#else
  82#define board_onenand_data      NULL
  83static inline int gpmc_onenand_init(struct omap_onenand_platform_data *d)
  84{
  85        return 0;
  86}
  87#endif
  88