Viewing file:  omap-gpmc.h (2.64 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* OMAP GPMC (General Purpose Memory Controller) defines
*/
#include <linux/platform_data/gpmc-omap.h>
#define GPMC_CONFIG_WP 0x00000005
/* IRQ numbers in GPMC IRQ domain for legacy boot use */
#define GPMC_IRQ_FIFOEVENTENABLE 0
#define GPMC_IRQ_COUNT_EVENT 1
/**
* gpmc_nand_ops - Interface between NAND and GPMC
* @nand_write_buffer_empty: get the NAND write buffer empty status.
*/
struct gpmc_nand_ops {
bool (*nand_writebuffer_empty)(void);
};
struct gpmc_nand_regs;
struct gpmc_onenand_info {
bool sync_read;
bool sync_write;
int burst_len;
};
#if IS_ENABLED(CONFIG_OMAP_GPMC)
struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
int cs);
/**
* gpmc_omap_onenand_set_timings - set optimized sync timings.
* @cs: Chip Select Region
* @freq: Chip frequency
* @latency: Burst latency cycle count
* @info: Structure describing parameters used
*
* Sets optimized timings for the @cs region based on @freq and @latency.
* Updates the @info structure based on the GPMC settings.
*/
int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
int latency,
struct gpmc_onenand_info *info);
#else
static inline struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
int cs)
{
return NULL;
}
static inline
int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
int latency,
struct gpmc_onenand_info *info)
{
return -EINVAL;
}
#endif /* CONFIG_OMAP_GPMC */
extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
struct gpmc_settings *gpmc_s,
struct gpmc_device_timings *dev_t);
struct device_node;
extern int gpmc_get_client_irq(unsigned irq_config);
extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
extern int gpmc_calc_divider(unsigned int sync_clk);
extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
const struct gpmc_settings *s);
extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
extern void gpmc_cs_free(int cs);
extern int gpmc_configure(int cmd, int wval);
extern void gpmc_read_settings_dt(struct device_node *np,
struct gpmc_settings *p);
struct gpmc_timings;
struct omap_nand_platform_data;
struct omap_onenand_platform_data;
#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
#else
#define board_onenand_data NULL
static inline int gpmc_onenand_init(struct omap_onenand_platform_data *d)
{
return 0;
}
#endif
|