diff options
Diffstat (limited to 'include/linux/omap-gpmc.h')
-rw-r--r-- | include/linux/omap-gpmc.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/include/linux/omap-gpmc.h b/include/linux/omap-gpmc.h new file mode 100644 index 000000000..053feb415 --- /dev/null +++ b/include/linux/omap-gpmc.h @@ -0,0 +1,103 @@ +/* + * OMAP GPMC (General Purpose Memory Controller) defines + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#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); + +extern void omap3_gpmc_save_context(void); +extern void omap3_gpmc_restore_context(void); + +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 |