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89127ed381
The problem has its root in the calculation of the set-port offsets (macro MCFGPIO_SETR() in arch/m68k/include/asm/gpio.h), this assumes that all ports have the same offset from the base port address (MCFGPIO_SETR) which is defined in mcf520xsim.h as an alias of MCFGIO_PSETR_BUSCTL. Because the BUSCTL and BE port do not have a set-register (see MCF5208 Reference Manual Page 13-10, Table 13-3) the offset calculations went wrong. Because the BE and BUSCTL port do not seem useful in these parts, as they lack a set register, I removed them and adapted the gpio chip bases which are also used for the offset-calculations. Now both setting and resetting the chip selects works as expected from userland and from the kernelspace. Signed-off-by: Peter Turczak <peter@turczak.de> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
176 lines
5.2 KiB
C
176 lines
5.2 KiB
C
/*
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* Coldfire generic GPIO support
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*
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* (C) Copyright 2009, Steven King <sfking@fdwdc.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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#include <asm/mcfgpio.h>
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static struct mcf_gpio_chip mcf_gpio_chips[] = {
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{
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.gpio_chip = {
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.label = "PIRQ",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value,
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.ngpio = 8,
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},
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.pddr = (void __iomem *) MCFEPORT_EPDDR,
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.podr = (void __iomem *) MCFEPORT_EPDR,
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.ppdr = (void __iomem *) MCFEPORT_EPPDR,
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},
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{
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.gpio_chip = {
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.label = "CS",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 9,
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.ngpio = 3,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_CS,
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.podr = (void __iomem *) MCFGPIO_PODR_CS,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_CS,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_CS,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_CS,
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},
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{
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.gpio_chip = {
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.label = "FECI2C",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 16,
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.ngpio = 4,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_FECI2C,
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.podr = (void __iomem *) MCFGPIO_PODR_FECI2C,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_FECI2C,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_FECI2C,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_FECI2C,
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},
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{
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.gpio_chip = {
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.label = "QSPI",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 24,
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.ngpio = 4,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_QSPI,
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.podr = (void __iomem *) MCFGPIO_PODR_QSPI,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_QSPI,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_QSPI,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_QSPI,
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},
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{
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.gpio_chip = {
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.label = "TIMER",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 32,
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.ngpio = 4,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_TIMER,
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.podr = (void __iomem *) MCFGPIO_PODR_TIMER,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_TIMER,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_TIMER,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_TIMER,
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},
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{
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.gpio_chip = {
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.label = "UART",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 40,
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.ngpio = 8,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_UART,
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.podr = (void __iomem *) MCFGPIO_PODR_UART,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_UART,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_UART,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_UART,
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},
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{
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.gpio_chip = {
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.label = "FECH",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 48,
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.ngpio = 8,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_FECH,
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.podr = (void __iomem *) MCFGPIO_PODR_FECH,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_FECH,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_FECH,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_FECH,
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},
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{
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.gpio_chip = {
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.label = "FECL",
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.request = mcf_gpio_request,
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.free = mcf_gpio_free,
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.direction_input = mcf_gpio_direction_input,
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.direction_output = mcf_gpio_direction_output,
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.get = mcf_gpio_get_value,
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.set = mcf_gpio_set_value_fast,
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.base = 56,
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.ngpio = 8,
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},
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.pddr = (void __iomem *) MCFGPIO_PDDR_FECL,
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.podr = (void __iomem *) MCFGPIO_PODR_FECL,
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.ppdr = (void __iomem *) MCFGPIO_PPDSDR_FECL,
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.setr = (void __iomem *) MCFGPIO_PPDSDR_FECL,
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.clrr = (void __iomem *) MCFGPIO_PCLRR_FECL,
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},
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};
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static int __init mcf_gpio_init(void)
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{
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unsigned i = 0;
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while (i < ARRAY_SIZE(mcf_gpio_chips))
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(void)gpiochip_add((struct gpio_chip *)&mcf_gpio_chips[i++]);
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return 0;
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}
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core_initcall(mcf_gpio_init);
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