1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * OMAP GPMC (General Purpose Memory Controller) defines
4 */
5
6#include <linux/platform_data/gpmc-omap.h>
7
8#define GPMC_CONFIG_WP 0x00000005
9
10/* IRQ numbers in GPMC IRQ domain for legacy boot use */
11#define GPMC_IRQ_FIFOEVENTENABLE 0
12#define GPMC_IRQ_COUNT_EVENT 1
13
14/**
15 * gpmc_nand_ops - Interface between NAND and GPMC
16 * @nand_write_buffer_empty: get the NAND write buffer empty status.
17 */
18struct gpmc_nand_ops {
19 bool (*nand_writebuffer_empty)(void);
20};
21
22struct gpmc_nand_regs;
23
24struct gpmc_onenand_info {
25 bool sync_read;
26 bool sync_write;
27 int burst_len;
28};
29
30#if IS_ENABLED(CONFIG_OMAP_GPMC)
31struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
32 int cs);
33/**
34 * gpmc_omap_onenand_set_timings - set optimized sync timings.
35 * @cs: Chip Select Region
36 * @freq: Chip frequency
37 * @latency: Burst latency cycle count
38 * @info: Structure describing parameters used
39 *
40 * Sets optimized timings for the @cs region based on @freq and @latency.
41 * Updates the @info structure based on the GPMC settings.
42 */
43int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
44 int latency,
45 struct gpmc_onenand_info *info);
46
47#else
48static inline struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
49 int cs)
50{
51 return NULL;
52}
53
54static inline
55int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
56 int latency,
57 struct gpmc_onenand_info *info)
58{
59 return -EINVAL;
60}
61#endif /* CONFIG_OMAP_GPMC */
62
63extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
64 struct gpmc_settings *gpmc_s,
65 struct gpmc_device_timings *dev_t);
66
67struct device_node;
68
69extern int gpmc_get_client_irq(unsigned irq_config);
70
71extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
72
73extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
74extern int gpmc_calc_divider(unsigned int sync_clk);
75extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
76 const struct gpmc_settings *s);
77extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
78extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
79extern void gpmc_cs_free(int cs);
80extern int gpmc_configure(int cmd, int wval);
81extern void gpmc_read_settings_dt(struct device_node *np,
82 struct gpmc_settings *p);
83
84struct gpmc_timings;
85struct omap_nand_platform_data;
86struct omap_onenand_platform_data;
87
88#if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
89extern int gpmc_onenand_init(struct omap_onenand_platform_data *d);
90#else
91#define board_onenand_data NULL
92static inline int gpmc_onenand_init(struct omap_onenand_platform_data *d)
93{
94 return 0;
95}
96#endif
97

source code of linux/include/linux/omap-gpmc.h