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  */
  22 struct gpmc_nand_ops {
  23         bool (*nand_writebuffer_empty)(void);
  24 };
  25
  26 struct gpmc_nand_regs;
  27
  28 #if IS_ENABLED(CONFIG_OMAP_GPMC)
  29 struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
  30                                              int cs);
  31 #else
  32 static 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)
  43 void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
  44 #else
  45 static inline void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
  46 {
  47 }
  48 #endif /* CONFIG_OMAP_GPMC */
  49 /*--------------------------------*/
  50
  51 extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
  52                              struct gpmc_settings *gpmc_s,
  53                              struct gpmc_device_timings *dev_t);
  54
  55 struct device_node;
  56
  57 extern int gpmc_get_client_irq(unsigned irq_config);
  58
  59 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
  60
  61 extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
  62 extern int gpmc_calc_divider(unsigned int sync_clk);
  63 extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
  64                                const struct gpmc_settings *s);
  65 extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
  66 extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
  67 extern void gpmc_cs_free(int cs);
  68 extern int gpmc_configure(int cmd, int wval);
  69 extern void gpmc_read_settings_dt(struct device_node *np,
  70                                   struct gpmc_settings *p);
  71
  72 extern void omap3_gpmc_save_context(void);
  73 extern void omap3_gpmc_restore_context(void);
  74
  75 struct gpmc_timings;
  76 struct omap_nand_platform_data;
  77 struct omap_onenand_platform_data;
  78
  79 #if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
  80 extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
  81 #else
  82 #define board_onenand_data      NULL
  83 static inline int gpmc_onenand_init(struct omap_onenand_platform_data *d)
  84 {
  85         return 0;
  86 }
  87 #endif