2 * OMAP GPMC (General Purpose Memory Controller) defines
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.
10 /* Maximum Number of Chip Selects */
13 #define GPMC_CONFIG_WP 0x00000005
15 #define GPMC_IRQ_FIFOEVENTENABLE 0x01
16 #define GPMC_IRQ_COUNT_EVENT 0x02
18 #define GPMC_BURST_4 4 /* 4 word burst */
19 #define GPMC_BURST_8 8 /* 8 word burst */
20 #define GPMC_BURST_16 16 /* 16 word burst */
21 #define GPMC_DEVWIDTH_8BIT 1 /* 8-bit device width */
22 #define GPMC_DEVWIDTH_16BIT 2 /* 16-bit device width */
23 #define GPMC_MUX_AAD 1 /* Addr-Addr-Data multiplex */
24 #define GPMC_MUX_AD 2 /* Addr-Data multiplex */
26 /* bool type time settings */
27 struct gpmc_bool_timings
{
28 bool cycle2cyclediffcsen
;
29 bool cycle2cyclesamecsen
;
34 bool time_para_granularity
;
38 * Note that all values in this struct are in nanoseconds except sync_clk
39 * (which is in picoseconds), while the register values are in gpmc_fck cycles.
42 /* Minimum clock period for synchronous mode (in picoseconds) */
45 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
46 u32 cs_on
; /* Assertion time */
47 u32 cs_rd_off
; /* Read deassertion time */
48 u32 cs_wr_off
; /* Write deassertion time */
50 /* ADV signal timings corresponding to GPMC_CONFIG3 */
51 u32 adv_on
; /* Assertion time */
52 u32 adv_rd_off
; /* Read deassertion time */
53 u32 adv_wr_off
; /* Write deassertion time */
55 /* WE signals timings corresponding to GPMC_CONFIG4 */
56 u32 we_on
; /* WE assertion time */
57 u32 we_off
; /* WE deassertion time */
59 /* OE signals timings corresponding to GPMC_CONFIG4 */
60 u32 oe_on
; /* OE assertion time */
61 u32 oe_off
; /* OE deassertion time */
63 /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
64 u32 page_burst_access
; /* Multiple access word delay */
65 u32 access
; /* Start-cycle to first data valid delay */
66 u32 rd_cycle
; /* Total read cycle time */
67 u32 wr_cycle
; /* Total write cycle time */
70 u32 cycle2cycle_delay
;
75 /* The following are only on OMAP3430 */
76 u32 wr_access
; /* WRACCESSTIME */
77 u32 wr_data_mux_bus
; /* WRDATAONADMUXBUS */
79 struct gpmc_bool_timings bool_timings
;
82 /* Device timings in picoseconds */
83 struct gpmc_device_timings
{
84 u32 t_ceasu
; /* address setup to CS valid */
85 u32 t_avdasu
; /* address setup to ADV valid */
86 /* XXX: try to combine t_avdp_r & t_avdp_w. Issue is
87 * of tusb using these timings even for sync whilst
88 * ideally for adv_rd/(wr)_off it should have considered
89 * t_avdh instead. This indirectly necessitates r/w
90 * variations of t_avdp as it is possible to have one
93 u32 t_avdp_r
; /* ADV low time (what about t_cer ?) */
95 u32 t_aavdh
; /* address hold time */
96 u32 t_oeasu
; /* address setup to OE valid */
97 u32 t_aa
; /* access time from ADV assertion */
98 u32 t_iaa
; /* initial access time */
99 u32 t_oe
; /* access time from OE assertion */
100 u32 t_ce
; /* access time from CS asertion */
101 u32 t_rd_cycle
; /* read cycle time */
102 u32 t_cez_r
; /* read CS deassertion to high Z */
103 u32 t_cez_w
; /* write CS deassertion to high Z */
104 u32 t_oez
; /* OE deassertion to high Z */
105 u32 t_weasu
; /* address setup to WE valid */
106 u32 t_wpl
; /* write assertion time */
107 u32 t_wph
; /* write deassertion time */
108 u32 t_wr_cycle
; /* write cycle time */
111 u32 t_bacc
; /* burst access valid clock to output delay */
112 u32 t_ces
; /* CS setup time to clk */
113 u32 t_avds
; /* ADV setup time to clk */
114 u32 t_avdh
; /* ADV hold time from clk */
115 u32 t_ach
; /* address hold time from clk */
116 u32 t_rdyo
; /* clk to ready valid */
118 u32 t_ce_rdyz
; /* XXX: description ?, or use t_cez instead */
119 u32 t_ce_avd
; /* CS on to ADV on delay */
121 /* XXX: check the possibility of combining
122 * cyc_aavhd_oe & cyc_aavdh_we
124 u8 cyc_aavdh_oe
;/* read address hold time in cycles */
125 u8 cyc_aavdh_we
;/* write address hold time in cycles */
126 u8 cyc_oe
; /* access time from OE assertion in cycles */
127 u8 cyc_wpl
; /* write deassertion time in cycles */
128 u32 cyc_iaa
; /* initial access time in cycles */
137 struct gpmc_settings
{
138 bool burst_wrap
; /* enables wrap bursting */
139 bool burst_read
; /* enables read page/burst mode */
140 bool burst_write
; /* enables write page/burst mode */
141 bool device_nand
; /* device is NAND */
142 bool sync_read
; /* enables synchronous reads */
143 bool sync_write
; /* enables synchronous writes */
144 bool wait_on_read
; /* monitor wait on reads */
145 bool wait_on_write
; /* monitor wait on writes */
146 u32 burst_len
; /* page/burst length */
147 u32 device_width
; /* device bus width (8 or 16 bit) */
148 u32 mux_add_data
; /* multiplex address & data */
149 u32 wait_pin
; /* wait-pin to be used */
152 extern int gpmc_calc_timings(struct gpmc_timings
*gpmc_t
,
153 struct gpmc_settings
*gpmc_s
,
154 struct gpmc_device_timings
*dev_t
);
156 struct gpmc_nand_regs
;
159 extern void gpmc_update_nand_reg(struct gpmc_nand_regs
*reg
, int cs
);
160 extern int gpmc_get_client_irq(unsigned irq_config
);
162 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks
);
164 extern void gpmc_cs_write_reg(int cs
, int idx
, u32 val
);
165 extern int gpmc_calc_divider(unsigned int sync_clk
);
166 extern int gpmc_cs_set_timings(int cs
, const struct gpmc_timings
*t
,
167 const struct gpmc_settings
*s
);
168 extern int gpmc_cs_program_settings(int cs
, struct gpmc_settings
*p
);
169 extern int gpmc_cs_request(int cs
, unsigned long size
, unsigned long *base
);
170 extern void gpmc_cs_free(int cs
);
171 extern int gpmc_configure(int cmd
, int wval
);
172 extern void gpmc_read_settings_dt(struct device_node
*np
,
173 struct gpmc_settings
*p
);
175 extern void omap3_gpmc_save_context(void);
176 extern void omap3_gpmc_restore_context(void);
179 struct omap_nand_platform_data
;
180 struct omap_onenand_platform_data
;
182 #if IS_ENABLED(CONFIG_MTD_NAND_OMAP2)
183 extern int gpmc_nand_init(struct omap_nand_platform_data
*d
,
184 struct gpmc_timings
*gpmc_t
);
186 static inline int gpmc_nand_init(struct omap_nand_platform_data
*d
,
187 struct gpmc_timings
*gpmc_t
)
193 #if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
194 extern void gpmc_onenand_init(struct omap_onenand_platform_data
*d
);
196 #define board_onenand_data NULL
197 static inline void gpmc_onenand_init(struct omap_onenand_platform_data
*d
)