d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
26d474bb03
freebsd-skq/sys/arm/at91/at91_piovar.h

51 lines
2.4 KiB
C
Raw Normal View History

Add support for configuring pins to be one of {GPIO, PERIPHERAL A or PERIPHERAL B}, as well as direction of GPIO pin. Add defines for all the pins.
2006-07-02 03:50:44 +00:00
/*-
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
Tweak the disclaimer section of the license to match COPYRIGHT, for better or worse. Ok'd by folks that have additional copyrights to the files in cases where there's joint authorship.
2008-11-25 00:13:26 +00:00
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
Add support for configuring pins to be one of {GPIO, PERIPHERAL A or PERIPHERAL B}, as well as direction of GPIO pin. Add defines for all the pins.
2006-07-02 03:50:44 +00:00
*/
/* $FreeBSD$ */
#ifndef ARM_AT91_AT91_PIOVAR_H
- Try to bring these files closer to style(9). - Use DEVMETHOD_END. - Use NULL instead of 0 for pointers.
2012-04-14 11:29:32 +00:00
#define ARM_AT91_AT91_PIOVAR_H
Add support for configuring pins to be one of {GPIO, PERIPHERAL A or PERIPHERAL B}, as well as direction of GPIO pin. Add defines for all the pins.
2006-07-02 03:50:44 +00:00
- Try to bring these files closer to style(9). - Use DEVMETHOD_END. - Use NULL instead of 0 for pointers.
2012-04-14 11:29:32 +00:00
void at91_pio_use_periph_a(uint32_t pio, uint32_t periph_a_mask,
int use_pullup);
void at91_pio_use_periph_b(uint32_t pio, uint32_t periph_b_mask,
int use_pullup);
Add support for configuring pins to be one of {GPIO, PERIPHERAL A or PERIPHERAL B}, as well as direction of GPIO pin. Add defines for all the pins.
2006-07-02 03:50:44 +00:00
void at91_pio_use_gpio(uint32_t pio, uint32_t gpio_mask);
void at91_pio_gpio_input(uint32_t pio, uint32_t input_enable_mask);
MFp4: Introduce framework to configure the multiplexed pins on boot. Since the USART supprots RS-485 multidrop mode, it allows the TX pins to float. However, for RS-232 operations, we don't want these pins to float. Instead, they should be pulled up to avoid mismatches. Linux does something similar when it configures the TX lines. This implies that we also allow the RX lines to float rather than be in the state they are left in by the boot loader. Since they are input pins, I think that this is the right thing to do. Plus minor for our board.
2006-07-14 22:22:57 +00:00
void at91_pio_gpio_output(uint32_t pio, uint32_t output_enable_mask,
- Try to bring these files closer to style(9). - Use DEVMETHOD_END. - Use NULL instead of 0 for pointers.
2012-04-14 11:29:32 +00:00
int use_pullup);
Add userland access to at91 gpio functionality via ioctl calls. Also, add the ability for userland to be notified of changes on gpio pins via a select(2)/read(2) interface. Change the interrupt handler from filtered to threaded. Because of the uiomove() calls in the new interface, change locking from standard mutex to sx. Add / restore the at91_gpio_high_z() function. Reviewed by: imp (long ago)
2013-03-29 19:52:57 +00:00
void at91_pio_gpio_high_z(uint32_t pio, uint32_t high_z_mask, int enable);
Add support for configuring pins to be one of {GPIO, PERIPHERAL A or PERIPHERAL B}, as well as direction of GPIO pin. Add defines for all the pins.
2006-07-02 03:50:44 +00:00
void at91_pio_gpio_set(uint32_t pio, uint32_t data_mask);
void at91_pio_gpio_clear(uint32_t pio, uint32_t data_mask);
Fix regression issue after r248910. PR: arm/177685 Submitted by: Christoph Mallon <christoph.mallon@gmx.de>
2013-04-07 13:03:57 +00:00
uint32_t at91_pio_gpio_get(uint32_t pio, uint32_t data_mask);
- Try to bring these files closer to style(9). - Use DEVMETHOD_END. - Use NULL instead of 0 for pointers.
2012-04-14 11:29:32 +00:00
void at91_pio_gpio_set_deglitch(uint32_t pio, uint32_t data_mask,
int use_deglitch);
void at91_pio_gpio_set_interrupt(uint32_t pio, uint32_t data_mask,
int enable_interrupt);
Provide hooks into the GPIO lines and the ability to set/clear interrupts from them. This should be more generalized, but is sufficient for now. Submitted by: Hans Petter Selasky
2008-08-19 22:17:14 +00:00
uint32_t at91_pio_gpio_clear_interrupt(uint32_t pio);
Implement the FDT static pinctl/pinmux spec for Atmel. This will configure the mux and config registers for PIO devices based on what we find in the FDT. I developed it per the spec that had been committed to Linux in the January 2014 time frame and haven't updated. In short, bundles of pins are activated in specific ways for specific configurations, and we implement all of that. What's not included is a MI device infrastructure, any dynamic run-time changing of these pins, etc. Also not included are hooks into all the drivers to enable the latter (static at boot no driver changes are needed). These larger questions will need to be answered once we have more drivers like this for more platforms, or somebody has a heck of a lot of time to research a bunch of platforms, the Linux solution (which is good, but has its warts), etc.
2014-08-15 16:08:52 +00:00
void at91_pio_gpio_pullup(uint32_t pio, uint32_t data_mask, int do_pullup);
Add support for configuring pins to be one of {GPIO, PERIPHERAL A or PERIPHERAL B}, as well as direction of GPIO pin. Add defines for all the pins.
2006-07-02 03:50:44 +00:00
#endif /* ARM_AT91_AT91_PIOVAR_H */
Reference in New Issue Copy Permalink