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 #define GPMC_IRQ_FIFOEVENTENABLE        0x01
  15 #define GPMC_IRQ_COUNT_EVENT            0x02
  16
  17 /**
  18  * gpmc_nand_ops - Interface between NAND and GPMC
  19  * @nand_write_buffer_empty: get the NAND write buffer empty status.
  20  */
  21 struct gpmc_nand_ops {
  22         bool (*nand_writebuffer_empty)(void);
  23 };
  24
  25 struct gpmc_nand_regs;
  26
  27 #if IS_ENABLED(CONFIG_OMAP_GPMC)
  28 struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
  29                                              int cs);
  30 #else
  31 static inline gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
  32                                                     int cs)
  33 {
  34         return NULL;
  35 }
  36 #endif /* CONFIG_OMAP_GPMC */
  37
  38 /*--------------------------------*/
  39
  40 /* deprecated APIs */
  41 #if IS_ENABLED(CONFIG_OMAP_GPMC)
  42 void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
  43 #else
  44 static inline void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
  45 {
  46 }
  47 #endif /* CONFIG_OMAP_GPMC */
  48 /*--------------------------------*/
  49
  50 extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
  51                              struct gpmc_settings *gpmc_s,
  52                              struct gpmc_device_timings *dev_t);
  53
  54 struct device_node;
  55
  56 extern int gpmc_get_client_irq(unsigned irq_config);
  57
  58 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
  59
  60 extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
  61 extern int gpmc_calc_divider(unsigned int sync_clk);
  62 extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
  63                                const struct gpmc_settings *s);
  64 extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
  65 extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
  66 extern void gpmc_cs_free(int cs);
  67 extern int gpmc_configure(int cmd, int wval);
  68 extern void gpmc_read_settings_dt(struct device_node *np,
  69                                   struct gpmc_settings *p);
  70
  71 extern void omap3_gpmc_save_context(void);
  72 extern void omap3_gpmc_restore_context(void);
  73
  74 struct gpmc_timings;
  75 struct omap_nand_platform_data;
  76 struct omap_onenand_platform_data;
  77
  78 #if IS_ENABLED(CONFIG_MTD_NAND_OMAP2)
  79 extern int gpmc_nand_init(struct omap_nand_platform_data *d,
  80                           struct gpmc_timings *gpmc_t);
  81 #else
  82 static inline int gpmc_nand_init(struct omap_nand_platform_data *d,
  83                                  struct gpmc_timings *gpmc_t)
  84 {
  85         return 0;
  86 }
  87 #endif
  88
  89 #if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
  90 extern void gpmc_onenand_init(struct omap_onenand_platform_data *d);
  91 #else
  92 #define board_onenand_data      NULL
  93 static inline void gpmc_onenand_init(struct omap_onenand_platform_data *d)
  94 {
  95 }
  96 #endif