1 /* 2 * OMAP GPMC Platform data 3 * 4 * Copyright (C) 2014 Texas Instruments, Inc. - http://www.ti.com 5 * Roger Quadros <rogerq@ti.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2, as published by the Free Software Foundation. 10 */ 11 12 #ifndef _GPMC_OMAP_H_ 13 #define _GPMC_OMAP_H_ 14 15 /* Maximum Number of Chip Selects */ 16 #define GPMC_CS_NUM 8 17 18 /* bool type time settings */ 19 struct gpmc_bool_timings { 20 bool cycle2cyclediffcsen; 21 bool cycle2cyclesamecsen; 22 bool we_extra_delay; 23 bool oe_extra_delay; 24 bool adv_extra_delay; 25 bool cs_extra_delay; 26 bool time_para_granularity; 27 }; 28 29 /* 30 * Note that all values in this struct are in nanoseconds except sync_clk 31 * (which is in picoseconds), while the register values are in gpmc_fck cycles. 32 */ 33 struct gpmc_timings { 34 /* Minimum clock period for synchronous mode (in picoseconds) */ 35 u32 sync_clk; 36 37 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */ 38 u32 cs_on; /* Assertion time */ 39 u32 cs_rd_off; /* Read deassertion time */ 40 u32 cs_wr_off; /* Write deassertion time */ 41 42 /* ADV signal timings corresponding to GPMC_CONFIG3 */ 43 u32 adv_on; /* Assertion time */ 44 u32 adv_rd_off; /* Read deassertion time */ 45 u32 adv_wr_off; /* Write deassertion time */ 46 u32 adv_aad_mux_on; /* ADV assertion time for AAD */ 47 u32 adv_aad_mux_rd_off; /* ADV read deassertion time for AAD */ 48 u32 adv_aad_mux_wr_off; /* ADV write deassertion time for AAD */ 49 50 /* WE signals timings corresponding to GPMC_CONFIG4 */ 51 u32 we_on; /* WE assertion time */ 52 u32 we_off; /* WE deassertion time */ 53 54 /* OE signals timings corresponding to GPMC_CONFIG4 */ 55 u32 oe_on; /* OE assertion time */ 56 u32 oe_off; /* OE deassertion time */ 57 u32 oe_aad_mux_on; /* OE assertion time for AAD */ 58 u32 oe_aad_mux_off; /* OE deassertion time for AAD */ 59 60 /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */ 61 u32 page_burst_access; /* Multiple access word delay */ 62 u32 access; /* Start-cycle to first data valid delay */ 63 u32 rd_cycle; /* Total read cycle time */ 64 u32 wr_cycle; /* Total write cycle time */ 65 66 u32 bus_turnaround; 67 u32 cycle2cycle_delay; 68 69 u32 wait_monitoring; 70 u32 clk_activation; 71 72 /* The following are only on OMAP3430 */ 73 u32 wr_access; /* WRACCESSTIME */ 74 u32 wr_data_mux_bus; /* WRDATAONADMUXBUS */ 75 76 struct gpmc_bool_timings bool_timings; 77 }; 78 79 /* Device timings in picoseconds */ 80 struct gpmc_device_timings { 81 u32 t_ceasu; /* address setup to CS valid */ 82 u32 t_avdasu; /* address setup to ADV valid */ 83 /* XXX: try to combine t_avdp_r & t_avdp_w. Issue is 84 * of tusb using these timings even for sync whilst 85 * ideally for adv_rd/(wr)_off it should have considered 86 * t_avdh instead. This indirectly necessitates r/w 87 * variations of t_avdp as it is possible to have one 88 * sync & other async 89 */ 90 u32 t_avdp_r; /* ADV low time (what about t_cer ?) */ 91 u32 t_avdp_w; 92 u32 t_aavdh; /* address hold time */ 93 u32 t_oeasu; /* address setup to OE valid */ 94 u32 t_aa; /* access time from ADV assertion */ 95 u32 t_iaa; /* initial access time */ 96 u32 t_oe; /* access time from OE assertion */ 97 u32 t_ce; /* access time from CS asertion */ 98 u32 t_rd_cycle; /* read cycle time */ 99 u32 t_cez_r; /* read CS deassertion to high Z */ 100 u32 t_cez_w; /* write CS deassertion to high Z */ 101 u32 t_oez; /* OE deassertion to high Z */ 102 u32 t_weasu; /* address setup to WE valid */ 103 u32 t_wpl; /* write assertion time */ 104 u32 t_wph; /* write deassertion time */ 105 u32 t_wr_cycle; /* write cycle time */ 106 107 u32 clk; 108 u32 t_bacc; /* burst access valid clock to output delay */ 109 u32 t_ces; /* CS setup time to clk */ 110 u32 t_avds; /* ADV setup time to clk */ 111 u32 t_avdh; /* ADV hold time from clk */ 112 u32 t_ach; /* address hold time from clk */ 113 u32 t_rdyo; /* clk to ready valid */ 114 115 u32 t_ce_rdyz; /* XXX: description ?, or use t_cez instead */ 116 u32 t_ce_avd; /* CS on to ADV on delay */ 117 118 /* XXX: check the possibility of combining 119 * cyc_aavhd_oe & cyc_aavdh_we 120 */ 121 u8 cyc_aavdh_oe;/* read address hold time in cycles */ 122 u8 cyc_aavdh_we;/* write address hold time in cycles */ 123 u8 cyc_oe; /* access time from OE assertion in cycles */ 124 u8 cyc_wpl; /* write deassertion time in cycles */ 125 u32 cyc_iaa; /* initial access time in cycles */ 126 127 /* extra delays */ 128 bool ce_xdelay; 129 bool avd_xdelay; 130 bool oe_xdelay; 131 bool we_xdelay; 132 }; 133 134 #define GPMC_BURST_4 4 /* 4 word burst */ 135 #define GPMC_BURST_8 8 /* 8 word burst */ 136 #define GPMC_BURST_16 16 /* 16 word burst */ 137 #define GPMC_DEVWIDTH_8BIT 1 /* 8-bit device width */ 138 #define GPMC_DEVWIDTH_16BIT 2 /* 16-bit device width */ 139 #define GPMC_MUX_AAD 1 /* Addr-Addr-Data multiplex */ 140 #define GPMC_MUX_AD 2 /* Addr-Data multiplex */ 141 142 struct gpmc_settings { 143 bool burst_wrap; /* enables wrap bursting */ 144 bool burst_read; /* enables read page/burst mode */ 145 bool burst_write; /* enables write page/burst mode */ 146 bool device_nand; /* device is NAND */ 147 bool sync_read; /* enables synchronous reads */ 148 bool sync_write; /* enables synchronous writes */ 149 bool wait_on_read; /* monitor wait on reads */ 150 bool wait_on_write; /* monitor wait on writes */ 151 u32 burst_len; /* page/burst length */ 152 u32 device_width; /* device bus width (8 or 16 bit) */ 153 u32 mux_add_data; /* multiplex address & data */ 154 u32 wait_pin; /* wait-pin to be used */ 155 }; 156 157 /* Data for each chip select */ 158 struct gpmc_omap_cs_data { 159 bool valid; /* data is valid */ 160 bool is_nand; /* device within this CS is NAND */ 161 struct gpmc_settings *settings; 162 struct gpmc_device_timings *device_timings; 163 struct gpmc_timings *gpmc_timings; 164 struct platform_device *pdev; /* device within this CS region */ 165 unsigned int pdata_size; 166 }; 167 168 struct gpmc_omap_platform_data { 169 struct gpmc_omap_cs_data cs[GPMC_CS_NUM]; 170 }; 171 172 #endif /* _GPMC_OMAP_H */ 173