1 /* 2 * Definitions for Freescale Coldfire QSPI module 3 * 4 * Copyright 2010 Steven King <sfking@fdwdc.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 8 * as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 */ 15 16 #ifndef mcfqspi_h 17 #define mcfqspi_h 18 19 /** 20 * struct mcfqspi_cs_control - chip select control for the coldfire qspi driver 21 * @setup: setup the control; allocate gpio's, etc. May be NULL. 22 * @teardown: finish with the control; free gpio's, etc. May be NULL. 23 * @select: output the signals to select the device. Can not be NULL. 24 * @deselect: output the signals to deselect the device. Can not be NULL. 25 * 26 * The QSPI module has 4 hardware chip selects. We don't use them. Instead 27 * platforms are required to supply a mcfqspi_cs_control as a part of the 28 * platform data for each QSPI master controller. Only the select and 29 * deselect functions are required. 30 */ 31 struct mcfqspi_cs_control { 32 int (*setup)(struct mcfqspi_cs_control *); 33 void (*teardown)(struct mcfqspi_cs_control *); 34 void (*select)(struct mcfqspi_cs_control *, u8, bool); 35 void (*deselect)(struct mcfqspi_cs_control *, u8, bool); 36 }; 37 38 /** 39 * struct mcfqspi_platform_data - platform data for the coldfire qspi driver 40 * @bus_num: board specific identifier for this qspi driver. 41 * @num_chipselects: number of chip selects supported by this qspi driver. 42 * @cs_control: platform dependent chip select control. 43 */ 44 struct mcfqspi_platform_data { 45 s16 bus_num; 46 u16 num_chipselect; 47 struct mcfqspi_cs_control *cs_control; 48 }; 49 50 #endif /* mcfqspi_h */ 51