mirror of
https://github.com/torvalds/linux.git
synced 2024-11-14 16:12:02 +00:00
91d6041721
Since Grant has added the coldfire-qspi driver to next-spi, here is the platform support for the parts that have qspi hardware. This sets up gpio to do the spi chip select using the default chip select pins; it should be trivial for boards that require different or additional spi chip selects to use other gpios as needed. Signed-off-by: Steven King <sfking@fdwdc.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/*
|
|
* Definitions for Freescale Coldfire QSPI module
|
|
*
|
|
* Copyright 2010 Steven King <sfking@fdwdc.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#ifndef mcfqspi_h
|
|
#define mcfqspi_h
|
|
|
|
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
|
|
#define MCFQSPI_IOBASE (MCF_IPSBAR + 0x340)
|
|
#elif defined(CONFIG_M5249)
|
|
#define MCFQSPI_IOBASE (MCF_MBAR + 0x300)
|
|
#elif defined(CONFIG_M520x) || defined(CONFIG_M532x)
|
|
#define MCFQSPI_IOBASE 0xFC058000
|
|
#endif
|
|
#define MCFQSPI_IOSIZE 0x40
|
|
|
|
/**
|
|
* struct mcfqspi_cs_control - chip select control for the coldfire qspi driver
|
|
* @setup: setup the control; allocate gpio's, etc. May be NULL.
|
|
* @teardown: finish with the control; free gpio's, etc. May be NULL.
|
|
* @select: output the signals to select the device. Can not be NULL.
|
|
* @deselect: output the signals to deselect the device. Can not be NULL.
|
|
*
|
|
* The QSPI module has 4 hardware chip selects. We don't use them. Instead
|
|
* platforms are required to supply a mcfqspi_cs_control as a part of the
|
|
* platform data for each QSPI master controller. Only the select and
|
|
* deselect functions are required.
|
|
*/
|
|
struct mcfqspi_cs_control {
|
|
int (*setup)(struct mcfqspi_cs_control *);
|
|
void (*teardown)(struct mcfqspi_cs_control *);
|
|
void (*select)(struct mcfqspi_cs_control *, u8, bool);
|
|
void (*deselect)(struct mcfqspi_cs_control *, u8, bool);
|
|
};
|
|
|
|
/**
|
|
* struct mcfqspi_platform_data - platform data for the coldfire qspi driver
|
|
* @bus_num: board specific identifier for this qspi driver.
|
|
* @num_chipselects: number of chip selects supported by this qspi driver.
|
|
* @cs_control: platform dependent chip select control.
|
|
*/
|
|
struct mcfqspi_platform_data {
|
|
s16 bus_num;
|
|
u16 num_chipselect;
|
|
struct mcfqspi_cs_control *cs_control;
|
|
};
|
|
|
|
#endif /* mcfqspi_h */
|