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 * You should have received a copy of the GNU General Public License along 16 * with this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 */ 20 21 #ifndef mcfqspi_h 22 #define mcfqspi_h 23 24 /** 25 * struct mcfqspi_cs_control - chip select control for the coldfire qspi driver 26 * @setup: setup the control; allocate gpio's, etc. May be NULL. 27 * @teardown: finish with the control; free gpio's, etc. May be NULL. 28 * @select: output the signals to select the device. Can not be NULL. 29 * @deselect: output the signals to deselect the device. Can not be NULL. 30 * 31 * The QSPI module has 4 hardware chip selects. We don't use them. Instead 32 * platforms are required to supply a mcfqspi_cs_control as a part of the 33 * platform data for each QSPI master controller. Only the select and 34 * deselect functions are required. 35 */ 36 struct mcfqspi_cs_control { 37 int (*setup)(struct mcfqspi_cs_control *); 38 void (*teardown)(struct mcfqspi_cs_control *); 39 void (*select)(struct mcfqspi_cs_control *, u8, bool); 40 void (*deselect)(struct mcfqspi_cs_control *, u8, bool); 41 }; 42 43 /** 44 * struct mcfqspi_platform_data - platform data for the coldfire qspi driver 45 * @bus_num: board specific identifier for this qspi driver. 46 * @num_chipselects: number of chip selects supported by this qspi driver. 47 * @cs_control: platform dependent chip select control. 48 */ 49 struct mcfqspi_platform_data { 50 s16 bus_num; 51 u16 num_chipselect; 52 struct mcfqspi_cs_control *cs_control; 53 }; 54 55 #endif /* mcfqspi_h */ 56