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 #include <linux/platform_data/gpmc-omap.h>
12 #define GPMC_CONFIG_WP 0x00000005
14 #define GPMC_IRQ_FIFOEVENTENABLE 0x01
15 #define GPMC_IRQ_COUNT_EVENT 0x02
17 #define GPMC_BURST_4 4 /* 4 word burst */
18 #define GPMC_BURST_8 8 /* 8 word burst */
19 #define GPMC_BURST_16 16 /* 16 word burst */
20 #define GPMC_DEVWIDTH_8BIT 1 /* 8-bit device width */
21 #define GPMC_DEVWIDTH_16BIT 2 /* 16-bit device width */
22 #define GPMC_MUX_AAD 1 /* Addr-Addr-Data multiplex */
23 #define GPMC_MUX_AD 2 /* Addr-Data multiplex */
25 /* bool type time settings */
26 struct gpmc_bool_timings {
27 bool cycle2cyclediffcsen;
28 bool cycle2cyclesamecsen;
33 bool time_para_granularity;
37 * Note that all values in this struct are in nanoseconds except sync_clk
38 * (which is in picoseconds), while the register values are in gpmc_fck cycles.
41 /* Minimum clock period for synchronous mode (in picoseconds) */
44 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
45 u32 cs_on; /* Assertion time */
46 u32 cs_rd_off; /* Read deassertion time */
47 u32 cs_wr_off; /* Write deassertion time */
49 /* ADV signal timings corresponding to GPMC_CONFIG3 */
50 u32 adv_on; /* Assertion time */
51 u32 adv_rd_off; /* Read deassertion time */
52 u32 adv_wr_off; /* Write deassertion time */
53 u32 adv_aad_mux_on; /* ADV assertion time for AAD */
54 u32 adv_aad_mux_rd_off; /* ADV read deassertion time for AAD */
55 u32 adv_aad_mux_wr_off; /* ADV write deassertion time for AAD */
57 /* WE signals timings corresponding to GPMC_CONFIG4 */
58 u32 we_on; /* WE assertion time */
59 u32 we_off; /* WE deassertion time */
61 /* OE signals timings corresponding to GPMC_CONFIG4 */
62 u32 oe_on; /* OE assertion time */
63 u32 oe_off; /* OE deassertion time */
64 u32 oe_aad_mux_on; /* OE assertion time for AAD */
65 u32 oe_aad_mux_off; /* OE deassertion time for AAD */
67 /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
68 u32 page_burst_access; /* Multiple access word delay */
69 u32 access; /* Start-cycle to first data valid delay */
70 u32 rd_cycle; /* Total read cycle time */
71 u32 wr_cycle; /* Total write cycle time */
74 u32 cycle2cycle_delay;
79 /* The following are only on OMAP3430 */
80 u32 wr_access; /* WRACCESSTIME */
81 u32 wr_data_mux_bus; /* WRDATAONADMUXBUS */
83 struct gpmc_bool_timings bool_timings;
86 /* Device timings in picoseconds */
87 struct gpmc_device_timings {
88 u32 t_ceasu; /* address setup to CS valid */
89 u32 t_avdasu; /* address setup to ADV valid */
90 /* XXX: try to combine t_avdp_r & t_avdp_w. Issue is
91 * of tusb using these timings even for sync whilst
92 * ideally for adv_rd/(wr)_off it should have considered
93 * t_avdh instead. This indirectly necessitates r/w
94 * variations of t_avdp as it is possible to have one
97 u32 t_avdp_r; /* ADV low time (what about t_cer ?) */
99 u32 t_aavdh; /* address hold time */
100 u32 t_oeasu; /* address setup to OE valid */
101 u32 t_aa; /* access time from ADV assertion */
102 u32 t_iaa; /* initial access time */
103 u32 t_oe; /* access time from OE assertion */
104 u32 t_ce; /* access time from CS asertion */
105 u32 t_rd_cycle; /* read cycle time */
106 u32 t_cez_r; /* read CS deassertion to high Z */
107 u32 t_cez_w; /* write CS deassertion to high Z */
108 u32 t_oez; /* OE deassertion to high Z */
109 u32 t_weasu; /* address setup to WE valid */
110 u32 t_wpl; /* write assertion time */
111 u32 t_wph; /* write deassertion time */
112 u32 t_wr_cycle; /* write cycle time */
115 u32 t_bacc; /* burst access valid clock to output delay */
116 u32 t_ces; /* CS setup time to clk */
117 u32 t_avds; /* ADV setup time to clk */
118 u32 t_avdh; /* ADV hold time from clk */
119 u32 t_ach; /* address hold time from clk */
120 u32 t_rdyo; /* clk to ready valid */
122 u32 t_ce_rdyz; /* XXX: description ?, or use t_cez instead */
123 u32 t_ce_avd; /* CS on to ADV on delay */
125 /* XXX: check the possibility of combining
126 * cyc_aavhd_oe & cyc_aavdh_we
128 u8 cyc_aavdh_oe;/* read address hold time in cycles */
129 u8 cyc_aavdh_we;/* write address hold time in cycles */
130 u8 cyc_oe; /* access time from OE assertion in cycles */
131 u8 cyc_wpl; /* write deassertion time in cycles */
132 u32 cyc_iaa; /* initial access time in cycles */
141 struct gpmc_settings {
142 bool burst_wrap; /* enables wrap bursting */
143 bool burst_read; /* enables read page/burst mode */
144 bool burst_write; /* enables write page/burst mode */
145 bool device_nand; /* device is NAND */
146 bool sync_read; /* enables synchronous reads */
147 bool sync_write; /* enables synchronous writes */
148 bool wait_on_read; /* monitor wait on reads */
149 bool wait_on_write; /* monitor wait on writes */
150 u32 burst_len; /* page/burst length */
151 u32 device_width; /* device bus width (8 or 16 bit) */
152 u32 mux_add_data; /* multiplex address & data */
153 u32 wait_pin; /* wait-pin to be used */
156 extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
157 struct gpmc_settings *gpmc_s,
158 struct gpmc_device_timings *dev_t);
160 struct gpmc_nand_regs;
163 extern void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
164 extern int gpmc_get_client_irq(unsigned irq_config);
166 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
168 extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
169 extern int gpmc_calc_divider(unsigned int sync_clk);
170 extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
171 const struct gpmc_settings *s);
172 extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
173 extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
174 extern void gpmc_cs_free(int cs);
175 extern int gpmc_configure(int cmd, int wval);
176 extern void gpmc_read_settings_dt(struct device_node *np,
177 struct gpmc_settings *p);
179 extern void omap3_gpmc_save_context(void);
180 extern void omap3_gpmc_restore_context(void);
183 struct omap_nand_platform_data;
184 struct omap_onenand_platform_data;
186 #if IS_ENABLED(CONFIG_MTD_NAND_OMAP2)
187 extern int gpmc_nand_init(struct omap_nand_platform_data *d,
188 struct gpmc_timings *gpmc_t);
190 static inline int gpmc_nand_init(struct omap_nand_platform_data *d,
191 struct gpmc_timings *gpmc_t)
197 #if IS_ENABLED(CONFIG_MTD_ONENAND_OMAP2)
198 extern void gpmc_onenand_init(struct omap_onenand_platform_data *d);
200 #define board_onenand_data NULL
201 static inline void gpmc_onenand_init(struct omap_onenand_platform_data *d)