- Separate the portmux configuration functionality from the GPIO pin control API. - Separate the controller-specific code from the chip-specific code. - Allow "ganged" port configuration (multiple pins at once). - Add more flexibility to the "canned" peripheral select functions: - Allow using more than 23 address bits, more chip selects, as well as NAND- and CF-specific pins. - Make the MACB SPEED pin optional, and choose between MII/RMII using a parameter instead of an #ifdef. - Make it possible to use other MMC slots than slot 0, and support different MMC/SDCard data bus widths. - Use more reasonable pull-up defaults; floating pins may consume a lot of power. - Get rid of some custom portmux code from the mimc200 board code. The old gpio/portmux API couldn't really handle its requirements, but the new one can. - Add documentation.
The end result is slightly smaller code for all boards. Which isn't really the point, but at least it isn't any larger.
This has been verified on ATSTK1002 and ATNGW100. I'd appreciate if the board maintainers could help me test this on their boards. In particular, the mimc200 port has lost a lot of code, so I'm hoping Mark can help me out.
Signed-off-by: Haavard Skinnemoen haavard.skinnemoen@atmel.com Cc: Hans-Christian Egtvedt hans-christian.egtvedt@atmel.com Cc: Mark Jackson mpfj@mimc.co.uk Cc: Alex Raimondi alex.raimondi@miromico.ch Cc: Julien May julien.may@miromico.ch --- board/atmel/atngw100/atngw100.c | 15 +- board/atmel/atstk1000/atstk1000.c | 12 +- board/earthlcd/favr-32-ezkit/favr-32-ezkit.c | 10 +- board/mimc/mimc200/mimc200.c | 88 +++-------- board/miromico/hammerhead/hammerhead.c | 12 +- cpu/at32ap/Makefile | 2 +- cpu/at32ap/at32ap700x/Makefile | 2 +- cpu/at32ap/at32ap700x/gpio.c | 199 ------------------------ cpu/at32ap/at32ap700x/portmux.c | 202 +++++++++++++++++++++++++ cpu/at32ap/pio.c | 116 -------------- cpu/at32ap/portmux-pio.c | 92 +++++++++++ doc/README.AVR32-port-muxing | 208 ++++++++++++++++++++++++++ include/asm-avr32/arch-at32ap700x/gpio.h | 184 +---------------------- include/asm-avr32/arch-at32ap700x/portmux.h | 89 +++++++++++ include/asm-avr32/arch-common/portmux-pio.h | 136 +++++++++++++++++ 15 files changed, 783 insertions(+), 584 deletions(-) delete mode 100644 cpu/at32ap/at32ap700x/gpio.c create mode 100644 cpu/at32ap/at32ap700x/portmux.c delete mode 100644 cpu/at32ap/pio.c create mode 100644 cpu/at32ap/portmux-pio.c create mode 100644 doc/README.AVR32-port-muxing create mode 100644 include/asm-avr32/arch-at32ap700x/portmux.h create mode 100644 include/asm-avr32/arch-common/portmux-pio.h
diff --git a/board/atmel/atngw100/atngw100.c b/board/atmel/atngw100/atngw100.c index 7f3e485..03544aa 100644 --- a/board/atmel/atngw100/atngw100.c +++ b/board/atmel/atngw100/atngw100.c @@ -26,6 +26,7 @@ #include <asm/arch/clk.h> #include <asm/arch/gpio.h> #include <asm/arch/hmatrix.h> +#include <asm/arch/portmux.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -50,18 +51,18 @@ int board_early_init_f(void) /* Enable SDRAM in the EBI mux */ hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
- gpio_enable_ebi(); - gpio_enable_usart1(); + portmux_enable_ebi(16, 23, 0, PORTMUX_DRIVE_HIGH); + portmux_enable_usart1(PORTMUX_DRIVE_MIN);
#if defined(CONFIG_MACB) - gpio_enable_macb0(); - gpio_enable_macb1(); + portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH); + portmux_enable_macb1(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH); #endif #if defined(CONFIG_MMC) - gpio_enable_mmci(); + portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW); #endif #if defined(CONFIG_ATMEL_SPI) - gpio_enable_spi0(1 << 0); + portmux_enable_spi0(1 << 0, PORTMUX_DRIVE_LOW); #endif
return 0; @@ -108,7 +109,7 @@ int board_eth_init(bd_t *bi) #ifdef CONFIG_ATMEL_SPI #include <spi.h>
-#define ATNGW100_DATAFLASH_CS_PIN GPIO_PIN_PA3 +#define ATNGW100_DATAFLASH_CS_PIN GPIO_PIN_PA(3)
int spi_cs_is_valid(unsigned int bus, unsigned int cs) { diff --git a/board/atmel/atstk1000/atstk1000.c b/board/atmel/atstk1000/atstk1000.c index 915b1c3..cc400a9 100644 --- a/board/atmel/atstk1000/atstk1000.c +++ b/board/atmel/atstk1000/atstk1000.c @@ -24,8 +24,8 @@ #include <asm/io.h> #include <asm/sdram.h> #include <asm/arch/clk.h> -#include <asm/arch/gpio.h> #include <asm/arch/hmatrix.h> +#include <asm/arch/portmux.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -77,14 +77,14 @@ int board_early_init_f(void) /* Enable SDRAM in the EBI mux */ hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
- gpio_enable_ebi(); - gpio_enable_usart1(); + portmux_enable_ebi(sdram_config.data_bits, 23, 0, PORTMUX_DRIVE_HIGH); + portmux_enable_usart1(PORTMUX_DRIVE_MIN); #if defined(CONFIG_MACB) - gpio_enable_macb0(); - gpio_enable_macb1(); + portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_LOW); + portmux_enable_macb1(PORTMUX_MACB_MII, PORTMUX_DRIVE_LOW); #endif #if defined(CONFIG_MMC) - gpio_enable_mmci(); + portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW); #endif
return 0; diff --git a/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c b/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c index da69e75..b2ddd08 100644 --- a/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c +++ b/board/earthlcd/favr-32-ezkit/favr-32-ezkit.c @@ -22,8 +22,8 @@ #include <asm/io.h> #include <asm/sdram.h> #include <asm/arch/clk.h> -#include <asm/arch/gpio.h> #include <asm/arch/hmatrix.h> +#include <asm/arch/portmux.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -49,13 +49,13 @@ int board_early_init_f(void) /* Enable SDRAM in the EBI mux */ hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
- gpio_enable_ebi(); - gpio_enable_usart3(); + portmux_enable_ebi(32, 23, 0, PORTMUX_DRIVE_HIGH); + portmux_enable_usart3(PORTMUX_DRIVE_MIN); #if defined(CONFIG_MACB) - gpio_enable_macb0(); + portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH); #endif #if defined(CONFIG_MMC) - gpio_enable_mmci(); + portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW); #endif
return 0; diff --git a/board/mimc/mimc200/mimc200.c b/board/mimc/mimc200/mimc200.c index 4ece11a..4da4678 100644 --- a/board/mimc/mimc200/mimc200.c +++ b/board/mimc/mimc200/mimc200.c @@ -26,6 +26,7 @@ #include <asm/arch/clk.h> #include <asm/arch/gpio.h> #include <asm/arch/hmatrix.h> +#include <asm/arch/portmux.h> #include <lcd.h>
#define SM_PM_GCCTRL 0x0060 @@ -53,98 +54,51 @@ int board_early_init_f(void) /* Enable SDRAM in the EBI mux */ hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
- gpio_enable_ebi(); - gpio_enable_usart1(); - - /* enable higher address lines for larger flash devices */ - gpio_select_periph_A(GPIO_PIN_PE16, 0); /* ADDR23 */ - gpio_select_periph_A(GPIO_PIN_PE17, 0); /* ADDR24 */ - gpio_select_periph_A(GPIO_PIN_PE18, 0); /* ADDR25 */ - - /* enable data flash chip select */ - gpio_select_periph_A(GPIO_PIN_PE25, 0); /* NCS2 */ + /* Enable 26 address bits and NCS2 */ + portmux_enable_ebi(16, 26, PORTMUX_EBI_CS(2), PORTMUX_DRIVE_HIGH); + portmux_enable_usart1(PORTMUX_DRIVE_MIN);
/* de-assert "force sys reset" pin */ - gpio_set_value(GPIO_PIN_PD15, 1); /* FORCE RESET */ - gpio_select_pio(GPIO_PIN_PD15, GPIOF_OUTPUT); + portmux_select_gpio(PORTMUX_PORT_D, 1 << 15, + PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH);
/* init custom i/o */ /* cpu type inputs */ - gpio_select_pio(GPIO_PIN_PE19, 0); - gpio_select_pio(GPIO_PIN_PE20, 0); - gpio_select_pio(GPIO_PIN_PE23, 0); + portmux_select_gpio(PORTMUX_PORT_E, (1 << 19) | (1 << 20) | (1 << 23), + PORTMUX_DIR_INPUT); /* main board type inputs */ - gpio_select_pio(GPIO_PIN_PB19, 0); - gpio_select_pio(GPIO_PIN_PB29, 0); + portmux_select_gpio(PORTMUX_PORT_B, (1 << 19) | (1 << 29), + PORTMUX_DIR_INPUT); /* DEBUG input (use weak pullup) */ - gpio_select_pio(GPIO_PIN_PE21, GPIOF_PULLUP); + portmux_select_gpio(PORTMUX_PORT_E, 1 << 21, + PORTMUX_DIR_INPUT | PORTMUX_PULL_UP);
/* are we suppressing the console ? */ - if (gpio_get_value(GPIO_PIN_PE21) == 1) + if (gpio_get_value(GPIO_PIN_PE(21)) == 1) gd->flags |= GD_FLG_SILENT;
/* reset phys */ - gpio_select_pio(GPIO_PIN_PE24, 0); - gpio_set_value(GPIO_PIN_PC18, 1); /* PHY RESET */ - gpio_select_pio(GPIO_PIN_PC18, GPIOF_OUTPUT); + portmux_select_gpio(PORTMUX_PORT_E, 1 << 24, PORTMUX_DIR_INPUT); + portmux_select_gpio(PORTMUX_PORT_C, 1 << 18, + PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH);
/* GCLK0 - 10MHz clock */ writel(0x00000004, (void *)SM_BASE + SM_PM_GCCTRL); - gpio_select_periph_A(GPIO_PIN_PA30, 0); + portmux_select_peripheral(PORTMUX_PORT_A, 1 << 30, PORTMUX_FUNC_A, 0);
udelay(5000);
/* release phys reset */ - gpio_set_value(GPIO_PIN_PC18, 0); /* PHY RESET (Release) */ + gpio_set_value(GPIO_PIN_PC(18), 0); /* PHY RESET (Release) */
#if defined(CONFIG_MACB) /* init macb0 pins */ - gpio_select_periph_A(GPIO_PIN_PC3, 0); /* TXD0 */ - gpio_select_periph_A(GPIO_PIN_PC4, 0); /* TXD1 */ - gpio_select_periph_A(GPIO_PIN_PC7, 0); /* TXEN */ - gpio_select_periph_A(GPIO_PIN_PC8, 0); /* TXCK */ - gpio_select_periph_A(GPIO_PIN_PC9, 0); /* RXD0 */ - gpio_select_periph_A(GPIO_PIN_PC10, 0); /* RXD1 */ - gpio_select_periph_A(GPIO_PIN_PC13, 0); /* RXER */ - gpio_select_periph_A(GPIO_PIN_PC15, 0); /* RXDV */ - gpio_select_periph_A(GPIO_PIN_PC16, 0); /* MDC */ - gpio_select_periph_A(GPIO_PIN_PC17, 0); /* MDIO */ -#if !defined(CONFIG_RMII) - gpio_select_periph_A(GPIO_PIN_PC0, 0); /* COL */ - gpio_select_periph_A(GPIO_PIN_PC1, 0); /* CRS */ - gpio_select_periph_A(GPIO_PIN_PC2, 0); /* TXER */ - gpio_select_periph_A(GPIO_PIN_PC5, 0); /* TXD2 */ - gpio_select_periph_A(GPIO_PIN_PC6, 0); /* TXD3 */ - gpio_select_periph_A(GPIO_PIN_PC11, 0); /* RXD2 */ - gpio_select_periph_A(GPIO_PIN_PC12, 0); /* RXD3 */ - gpio_select_periph_A(GPIO_PIN_PC14, 0); /* RXCK */ -#endif - - /* init macb1 pins */ - gpio_select_periph_B(GPIO_PIN_PD13, 0); /* TXD0 */ - gpio_select_periph_B(GPIO_PIN_PD14, 0); /* TXD1 */ - gpio_select_periph_B(GPIO_PIN_PD11, 0); /* TXEN */ - gpio_select_periph_B(GPIO_PIN_PD12, 0); /* TXCK */ - gpio_select_periph_B(GPIO_PIN_PD10, 0); /* RXD0 */ - gpio_select_periph_B(GPIO_PIN_PD6, 0); /* RXD1 */ - gpio_select_periph_B(GPIO_PIN_PD5, 0); /* RXER */ - gpio_select_periph_B(GPIO_PIN_PD4, 0); /* RXDV */ - gpio_select_periph_B(GPIO_PIN_PD3, 0); /* MDC */ - gpio_select_periph_B(GPIO_PIN_PD2, 0); /* MDIO */ -#if !defined(CONFIG_RMII) - gpio_select_periph_B(GPIO_PIN_PC19, 0); /* COL */ - gpio_select_periph_B(GPIO_PIN_PC23, 0); /* CRS */ - gpio_select_periph_B(GPIO_PIN_PC26, 0); /* TXER */ - gpio_select_periph_B(GPIO_PIN_PC27, 0); /* TXD2 */ - gpio_select_periph_B(GPIO_PIN_PC28, 0); /* TXD3 */ - gpio_select_periph_B(GPIO_PIN_PC29, 0); /* RXD2 */ - gpio_select_periph_B(GPIO_PIN_PC30, 0); /* RXD3 */ - gpio_select_periph_B(GPIO_PIN_PC24, 0); /* RXCK */ -#endif + portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH); + portmux_enable_macb1(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH); #endif
#if defined(CONFIG_MMC) - gpio_enable_mmci(); + portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW); #endif
return 0; diff --git a/board/miromico/hammerhead/hammerhead.c b/board/miromico/hammerhead/hammerhead.c index 738ece2..3d6cf9b 100644 --- a/board/miromico/hammerhead/hammerhead.c +++ b/board/miromico/hammerhead/hammerhead.c @@ -29,9 +29,9 @@ #include <asm/io.h> #include <asm/sdram.h> #include <asm/arch/clk.h> -#include <asm/arch/gpio.h> #include <asm/arch/hmatrix.h> #include <asm/arch/memory-map.h> +#include <asm/arch/portmux.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -65,14 +65,14 @@ int board_early_init_f(void) /* Enable SDRAM in the EBI mux */ hmatrix_slave_write(EBI, SFR, HMATRIX_BIT(EBI_SDRAM_ENABLE));
- gpio_enable_ebi(); - gpio_enable_usart1(); + portmux_enable_ebi(32, 23, 0, PORTMUX_DRIVE_HIGH); + portmux_enable_usart1(PORTMUX_DRIVE_MIN);
#if defined(CONFIG_MACB) - gpio_enable_macb0(); + portmux_enable_macb0(PORTMUX_MACB_MII, PORTMUX_DRIVE_HIGH); #endif #if defined(CONFIG_MMC) - gpio_enable_mmci(); + portmux_enable_mmci(0, PORTMUX_MMCI_4BIT, PORTMUX_DRIVE_LOW); #endif return 0; } @@ -107,7 +107,7 @@ void gclk_init(void) /* Hammerhead boards uses GCLK3 as 25MHz output to ethernet PHY */
/* Select GCLK3 peripheral function */ - gpio_select_periph_A(GPIO_PIN_PB29, 0); + portmux_select_peripheral(PORTMUX_PORT_B, 1 << 29, PORTMUX_FUNC_A, 0);
/* Enable GCLK3 with no input divider, from OSC0 (crystal) */ sm_writel(PM_GCCTRL(3), SM_BIT(CEN)); diff --git a/cpu/at32ap/Makefile b/cpu/at32ap/Makefile index 33dc427..b656416 100644 --- a/cpu/at32ap/Makefile +++ b/cpu/at32ap/Makefile @@ -34,7 +34,7 @@ COBJS-y += hsdramc.o COBJS-y += exception.o COBJS-y += cache.o COBJS-y += interrupts.o -COBJS-y += pio.o +COBJS-y += portmux-pio.o
SRCS := $(START-y:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) diff --git a/cpu/at32ap/at32ap700x/Makefile b/cpu/at32ap/at32ap700x/Makefile index 7404235..46e6ef6 100644 --- a/cpu/at32ap/at32ap700x/Makefile +++ b/cpu/at32ap/at32ap700x/Makefile @@ -24,7 +24,7 @@ include $(TOPDIR)/config.mk
LIB := $(obj)lib$(SOC).a
-COBJS := gpio.o clk.o +COBJS := portmux.o clk.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/cpu/at32ap/at32ap700x/gpio.c b/cpu/at32ap/at32ap700x/gpio.c deleted file mode 100644 index 56ba2f9..0000000 --- a/cpu/at32ap/at32ap700x/gpio.c +++ /dev/null @@ -1,199 +0,0 @@ -/* - * Copyright (C) 2006 Atmel Corporation - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ -#include <common.h> - -#include <asm/io.h> - -#include <asm/arch/chip-features.h> -#include <asm/arch/gpio.h> -#include <asm/arch/memory-map.h> - -/* - * Lots of small functions here. We depend on --gc-sections getting - * rid of the ones we don't need. - */ -void gpio_enable_ebi(void) -{ -#ifdef CFG_HSDRAMC -#ifndef CFG_SDRAM_16BIT - gpio_select_periph_A(GPIO_PIN_PE0, 0); - gpio_select_periph_A(GPIO_PIN_PE1, 0); - gpio_select_periph_A(GPIO_PIN_PE2, 0); - gpio_select_periph_A(GPIO_PIN_PE3, 0); - gpio_select_periph_A(GPIO_PIN_PE4, 0); - gpio_select_periph_A(GPIO_PIN_PE5, 0); - gpio_select_periph_A(GPIO_PIN_PE6, 0); - gpio_select_periph_A(GPIO_PIN_PE7, 0); - gpio_select_periph_A(GPIO_PIN_PE8, 0); - gpio_select_periph_A(GPIO_PIN_PE9, 0); - gpio_select_periph_A(GPIO_PIN_PE10, 0); - gpio_select_periph_A(GPIO_PIN_PE11, 0); - gpio_select_periph_A(GPIO_PIN_PE12, 0); - gpio_select_periph_A(GPIO_PIN_PE13, 0); - gpio_select_periph_A(GPIO_PIN_PE14, 0); - gpio_select_periph_A(GPIO_PIN_PE15, 0); -#endif - gpio_select_periph_A(GPIO_PIN_PE26, 0); -#endif -} - -#ifdef AT32AP700x_CHIP_HAS_USART -void gpio_enable_usart0(void) -{ - gpio_select_periph_B(GPIO_PIN_PA8, 0); - gpio_select_periph_B(GPIO_PIN_PA9, 0); -} - -void gpio_enable_usart1(void) -{ - gpio_select_periph_A(GPIO_PIN_PA17, 0); - gpio_select_periph_A(GPIO_PIN_PA18, 0); -} - -void gpio_enable_usart2(void) -{ - gpio_select_periph_B(GPIO_PIN_PB26, 0); - gpio_select_periph_B(GPIO_PIN_PB27, 0); -} - -void gpio_enable_usart3(void) -{ - gpio_select_periph_B(GPIO_PIN_PB17, 0); - gpio_select_periph_B(GPIO_PIN_PB18, 0); -} -#endif - -#ifdef AT32AP700x_CHIP_HAS_MACB -void gpio_enable_macb0(void) -{ - gpio_select_periph_A(GPIO_PIN_PC3, 0); /* TXD0 */ - gpio_select_periph_A(GPIO_PIN_PC4, 0); /* TXD1 */ - gpio_select_periph_A(GPIO_PIN_PC7, 0); /* TXEN */ - gpio_select_periph_A(GPIO_PIN_PC8, 0); /* TXCK */ - gpio_select_periph_A(GPIO_PIN_PC9, 0); /* RXD0 */ - gpio_select_periph_A(GPIO_PIN_PC10, 0); /* RXD1 */ - gpio_select_periph_A(GPIO_PIN_PC13, 0); /* RXER */ - gpio_select_periph_A(GPIO_PIN_PC15, 0); /* RXDV */ - gpio_select_periph_A(GPIO_PIN_PC16, 0); /* MDC */ - gpio_select_periph_A(GPIO_PIN_PC17, 0); /* MDIO */ -#if !defined(CONFIG_RMII) - gpio_select_periph_A(GPIO_PIN_PC0, 0); /* COL */ - gpio_select_periph_A(GPIO_PIN_PC1, 0); /* CRS */ - gpio_select_periph_A(GPIO_PIN_PC2, 0); /* TXER */ - gpio_select_periph_A(GPIO_PIN_PC5, 0); /* TXD2 */ - gpio_select_periph_A(GPIO_PIN_PC6, 0); /* TXD3 */ - gpio_select_periph_A(GPIO_PIN_PC11, 0); /* RXD2 */ - gpio_select_periph_A(GPIO_PIN_PC12, 0); /* RXD3 */ - gpio_select_periph_A(GPIO_PIN_PC14, 0); /* RXCK */ - gpio_select_periph_A(GPIO_PIN_PC18, 0); /* SPD */ -#endif -} - -void gpio_enable_macb1(void) -{ - gpio_select_periph_B(GPIO_PIN_PD13, 0); /* TXD0 */ - gpio_select_periph_B(GPIO_PIN_PD14, 0); /* TXD1 */ - gpio_select_periph_B(GPIO_PIN_PD11, 0); /* TXEN */ - gpio_select_periph_B(GPIO_PIN_PD12, 0); /* TXCK */ - gpio_select_periph_B(GPIO_PIN_PD10, 0); /* RXD0 */ - gpio_select_periph_B(GPIO_PIN_PD6, 0); /* RXD1 */ - gpio_select_periph_B(GPIO_PIN_PD5, 0); /* RXER */ - gpio_select_periph_B(GPIO_PIN_PD4, 0); /* RXDV */ - gpio_select_periph_B(GPIO_PIN_PD3, 0); /* MDC */ - gpio_select_periph_B(GPIO_PIN_PD2, 0); /* MDIO */ -#if !defined(CONFIG_RMII) - gpio_select_periph_B(GPIO_PIN_PC19, 0); /* COL */ - gpio_select_periph_B(GPIO_PIN_PC23, 0); /* CRS */ - gpio_select_periph_B(GPIO_PIN_PC26, 0); /* TXER */ - gpio_select_periph_B(GPIO_PIN_PC27, 0); /* TXD2 */ - gpio_select_periph_B(GPIO_PIN_PC28, 0); /* TXD3 */ - gpio_select_periph_B(GPIO_PIN_PC29, 0); /* RXD2 */ - gpio_select_periph_B(GPIO_PIN_PC30, 0); /* RXD3 */ - gpio_select_periph_B(GPIO_PIN_PC24, 0); /* RXCK */ - gpio_select_periph_B(GPIO_PIN_PD15, 0); /* SPD */ -#endif -} -#endif - -#ifdef AT32AP700x_CHIP_HAS_MMCI -void gpio_enable_mmci(void) -{ - gpio_select_periph_A(GPIO_PIN_PA10, 0); /* CLK */ - gpio_select_periph_A(GPIO_PIN_PA11, 0); /* CMD */ - gpio_select_periph_A(GPIO_PIN_PA12, 0); /* DATA0 */ - gpio_select_periph_A(GPIO_PIN_PA13, 0); /* DATA1 */ - gpio_select_periph_A(GPIO_PIN_PA14, 0); /* DATA2 */ - gpio_select_periph_A(GPIO_PIN_PA15, 0); /* DATA3 */ -} -#endif - -#ifdef AT32AP700x_CHIP_HAS_SPI -void gpio_enable_spi0(unsigned long cs_mask) -{ - gpio_select_periph_A(GPIO_PIN_PA0, 0); /* MISO */ - gpio_select_periph_A(GPIO_PIN_PA1, 0); /* MOSI */ - gpio_select_periph_A(GPIO_PIN_PA2, 0); /* SCK */ - - /* Set up NPCSx as GPIO outputs, initially high */ - if (cs_mask & (1 << 0)) { - gpio_set_value(GPIO_PIN_PA3, 1); - gpio_select_pio(GPIO_PIN_PA3, GPIOF_OUTPUT); - } - if (cs_mask & (1 << 1)) { - gpio_set_value(GPIO_PIN_PA4, 1); - gpio_select_pio(GPIO_PIN_PA4, GPIOF_OUTPUT); - } - if (cs_mask & (1 << 2)) { - gpio_set_value(GPIO_PIN_PA5, 1); - gpio_select_pio(GPIO_PIN_PA5, GPIOF_OUTPUT); - } - if (cs_mask & (1 << 3)) { - gpio_set_value(GPIO_PIN_PA20, 1); - gpio_select_pio(GPIO_PIN_PA20, GPIOF_OUTPUT); - } -} - -void gpio_enable_spi1(unsigned long cs_mask) -{ - gpio_select_periph_B(GPIO_PIN_PA0, 0); /* MISO */ - gpio_select_periph_B(GPIO_PIN_PB1, 0); /* MOSI */ - gpio_select_periph_B(GPIO_PIN_PB5, 0); /* SCK */ - - /* Set up NPCSx as GPIO outputs, initially high */ - if (cs_mask & (1 << 0)) { - gpio_set_value(GPIO_PIN_PB2, 1); - gpio_select_pio(GPIO_PIN_PB2, GPIOF_OUTPUT); - } - if (cs_mask & (1 << 1)) { - gpio_set_value(GPIO_PIN_PB3, 1); - gpio_select_pio(GPIO_PIN_PB3, GPIOF_OUTPUT); - } - if (cs_mask & (1 << 2)) { - gpio_set_value(GPIO_PIN_PB4, 1); - gpio_select_pio(GPIO_PIN_PB4, GPIOF_OUTPUT); - } - if (cs_mask & (1 << 3)) { - gpio_set_value(GPIO_PIN_PA27, 1); - gpio_select_pio(GPIO_PIN_PA27, GPIOF_OUTPUT); - } -} -#endif diff --git a/cpu/at32ap/at32ap700x/portmux.c b/cpu/at32ap/at32ap700x/portmux.c new file mode 100644 index 0000000..5ffa17a --- /dev/null +++ b/cpu/at32ap/at32ap700x/portmux.c @@ -0,0 +1,202 @@ +/* + * Copyright (C) 2006, 2008 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> + +#include <asm/io.h> + +#include <asm/arch/chip-features.h> +#include <asm/arch/memory-map.h> +#include <asm/arch/portmux.h> + +/* + * Lots of small functions here. We depend on --gc-sections getting + * rid of the ones we don't need. + */ +void portmux_enable_ebi(unsigned int bus_width, unsigned int addr_width, + unsigned long flags, unsigned long drive_strength) +{ + unsigned long porte_mask = 0; + + if (bus_width > 16) + portmux_select_peripheral(PORTMUX_PORT_E, 0xffff, + PORTMUX_FUNC_A, PORTMUX_BUSKEEPER); + if (addr_width > 23) + porte_mask |= (((1 << (addr_width - 23)) - 1) & 7) << 16; + if (flags & PORTMUX_EBI_CS(2)) + porte_mask |= 1 << 25; + if (flags & PORTMUX_EBI_CS(4)) + porte_mask |= 1 << 21; + if (flags & PORTMUX_EBI_CS(5)) + porte_mask |= 1 << 22; + if (flags & (PORTMUX_EBI_CF(0) | PORTMUX_EBI_CF(1))) + porte_mask |= (1 << 19) | (1 << 20) | (1 << 23); + if (flags & PORTMUX_EBI_NWAIT) + porte_mask |= 1 << 24; + + portmux_select_peripheral(PORTMUX_PORT_E, porte_mask, + PORTMUX_FUNC_A, 0); +} + +#ifdef AT32AP700x_CHIP_HAS_MACB +void portmux_enable_macb0(unsigned long flags, unsigned long drive_strength) +{ + unsigned long portc_mask; + + portc_mask = (1 << 3) /* TXD0 */ + | (1 << 4) /* TXD1 */ + | (1 << 7) /* TXEN */ + | (1 << 8) /* TXCK */ + | (1 << 9) /* RXD0 */ + | (1 << 10) /* RXD1 */ + | (1 << 13) /* RXER */ + | (1 << 15) /* RXDV */ + | (1 << 16) /* MDC */ + | (1 << 17); /* MDIO */ + + if (flags & PORTMUX_MACB_MII) + portc_mask |= (1 << 0) /* COL */ + | (1 << 1) /* CRS */ + | (1 << 2) /* TXER */ + | (1 << 5) /* TXD2 */ + | (1 << 6) /* TXD3 */ + | (1 << 11) /* RXD2 */ + | (1 << 12) /* RXD3 */ + | (1 << 14); /* RXCK */ + + if (flags & PORTMUX_MACB_SPEED) + portc_mask |= (1 << 18);/* SPD */ + + /* REVISIT: Some pins are probably pure outputs */ + portmux_select_peripheral(PORTMUX_PORT_C, portc_mask, + PORTMUX_FUNC_A, PORTMUX_BUSKEEPER); +} + +void portmux_enable_macb1(unsigned long flags, unsigned long drive_strength) +{ + unsigned long portc_mask = 0; + unsigned long portd_mask; + + portd_mask = (1 << 13) /* TXD0 */ + | (1 << 14) /* TXD1 */ + | (1 << 11) /* TXEN */ + | (1 << 12) /* TXCK */ + | (1 << 10) /* RXD0 */ + | (1 << 6) /* RXD1 */ + | (1 << 5) /* RXER */ + | (1 << 4) /* RXDV */ + | (1 << 3) /* MDC */ + | (1 << 2); /* MDIO */ + + if (flags & PORTMUX_MACB_MII) + portc_mask = (1 << 19) /* COL */ + | (1 << 23) /* CRS */ + | (1 << 26) /* TXER */ + | (1 << 27) /* TXD2 */ + | (1 << 28) /* TXD3 */ + | (1 << 29) /* RXD2 */ + | (1 << 30) /* RXD3 */ + | (1 << 24); /* RXCK */ + + if (flags & PORTMUX_MACB_SPEED) + portd_mask |= (1 << 15);/* SPD */ + + /* REVISIT: Some pins are probably pure outputs */ + portmux_select_peripheral(PORTMUX_PORT_D, portc_mask, + PORTMUX_FUNC_B, PORTMUX_BUSKEEPER); + portmux_select_peripheral(PORTMUX_PORT_C, portc_mask, + PORTMUX_FUNC_B, PORTMUX_BUSKEEPER); +} +#endif + +#ifdef AT32AP700x_CHIP_HAS_MMCI +void portmux_enable_mmci(unsigned int slot, unsigned long flags, + unsigned long drive_strength) +{ + unsigned long mask; + unsigned long portmux_flags = PORTMUX_PULL_UP; + + /* First, the common CLK signal. It doesn't need a pull-up */ + portmux_select_peripheral(PORTMUX_PORT_A, 1 << 10, + PORTMUX_FUNC_A, 0); + + if (flags & PORTMUX_MMCI_EXT_PULLUP) + portmux_flags = 0; + + /* Then, the per-slot signals */ + switch (slot) { + case 0: + mask = (1 << 11) | (1 << 12); /* CMD and DATA0 */ + if (flags & PORTMUX_MMCI_4BIT) + /* DATA1..DATA3 */ + mask |= (1 << 13) | (1 << 14) | (1 << 15); + portmux_select_peripheral(PORTMUX_PORT_A, mask, + PORTMUX_FUNC_A, portmux_flags); + break; + case 1: + mask = (1 << 6) | (1 << 7); /* CMD and DATA0 */ + if (flags & PORTMUX_MMCI_4BIT) + /* DATA1..DATA3 */ + mask |= (1 << 8) | (1 << 9) | (1 << 10); + portmux_select_peripheral(PORTMUX_PORT_B, mask, + PORTMUX_FUNC_B, portmux_flags); + break; + } +} +#endif + +#ifdef AT32AP700x_CHIP_HAS_SPI +void portmux_enable_spi0(unsigned long cs_mask, unsigned long drive_strength) +{ + unsigned long pin_mask; + + /* MOSI and SCK */ + portmux_select_peripheral(PORTMUX_PORT_A, (1 << 1) | (1 << 2), + PORTMUX_FUNC_A, 0); + /* MISO may float */ + portmux_select_peripheral(PORTMUX_PORT_A, 1 << 0, + PORTMUX_FUNC_A, PORTMUX_BUSKEEPER); + + /* Set up NPCSx as GPIO outputs, initially high */ + pin_mask = (cs_mask & 7) << 3; + if (cs_mask & (1 << 3)) + pin_mask |= 1 << 20; + + portmux_select_gpio(PORTMUX_PORT_A, pin_mask, + PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH); +} + +void portmux_enable_spi1(unsigned long cs_mask, unsigned long drive_strength) +{ + /* MOSI and SCK */ + portmux_select_peripheral(PORTMUX_PORT_B, (1 << 1) | (1 << 5), + PORTMUX_FUNC_B, 0); + /* MISO may float */ + portmux_select_peripheral(PORTMUX_PORT_B, 1 << 0, + PORTMUX_FUNC_B, PORTMUX_BUSKEEPER); + + /* Set up NPCSx as GPIO outputs, initially high */ + portmux_select_gpio(PORTMUX_PORT_B, (cs_mask & 7) << 2, + PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH); + portmux_select_gpio(PORTMUX_PORT_A, (cs_mask & 8) << (27 - 3), + PORTMUX_DIR_OUTPUT | PORTMUX_INIT_HIGH); +} +#endif diff --git a/cpu/at32ap/pio.c b/cpu/at32ap/pio.c deleted file mode 100644 index f64004b..0000000 --- a/cpu/at32ap/pio.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Copyright (C) 2006 Atmel Corporation - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ -#include <common.h> - -#include <asm/io.h> -#include <asm/arch/gpio.h> -#include <asm/arch/memory-map.h> - -#include "pio2.h" - -void gpio_select_periph_A(unsigned int pin, int use_pullup) -{ - void *base = gpio_pin_to_addr(pin); - uint32_t mask = 1 << (pin & 0x1f); - - if (!base) - panic("Invalid GPIO pin %u\n", pin); - - pio2_writel(base, ASR, mask); - pio2_writel(base, PDR, mask); - if (use_pullup) - pio2_writel(base, PUER, mask); - else - pio2_writel(base, PUDR, mask); -} - -void gpio_select_periph_B(unsigned int pin, int use_pullup) -{ - void *base = gpio_pin_to_addr(pin); - uint32_t mask = 1 << (pin & 0x1f); - - if (!base) - panic("Invalid GPIO pin %u\n", pin); - - pio2_writel(base, BSR, mask); - pio2_writel(base, PDR, mask); - if (use_pullup) - pio2_writel(base, PUER, mask); - else - pio2_writel(base, PUDR, mask); -} - -void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags) -{ - void *base = gpio_pin_to_addr(pin); - uint32_t mask = 1 << (pin & 0x1f); - - if (!base) - panic("Invalid GPIO pin %u\n", pin); - - if (gpiof_flags & GPIOF_OUTPUT) { - if (gpiof_flags & GPIOF_MULTIDRV) - pio2_writel(base, MDER, mask); - else - pio2_writel(base, MDDR, mask); - pio2_writel(base, PUDR, mask); - pio2_writel(base, OER, mask); - } else { - if (gpiof_flags & GPIOF_PULLUP) - pio2_writel(base, PUER, mask); - else - pio2_writel(base, PUDR, mask); - if (gpiof_flags & GPIOF_DEGLITCH) - pio2_writel(base, IFER, mask); - else - pio2_writel(base, IFDR, mask); - pio2_writel(base, ODR, mask); - } - - pio2_writel(base, PER, mask); -} - -void gpio_set_value(unsigned int pin, int value) -{ - void *base = gpio_pin_to_addr(pin); - uint32_t mask = 1 << (pin & 0x1f); - - if (!base) - panic("Invalid GPIO pin %u\n", pin); - - if (value) - pio2_writel(base, SODR, mask); - else - pio2_writel(base, CODR, mask); -} - -int gpio_get_value(unsigned int pin) -{ - void *base = gpio_pin_to_addr(pin); - int value; - - if (!base) - panic("Invalid GPIO pin %u\n", pin); - - value = pio2_readl(base, PDSR); - return (value >> (pin & 0x1f)) & 1; -} diff --git a/cpu/at32ap/portmux-pio.c b/cpu/at32ap/portmux-pio.c new file mode 100644 index 0000000..a29f94e --- /dev/null +++ b/cpu/at32ap/portmux-pio.c @@ -0,0 +1,92 @@ +/* + * Copyright (C) 2006, 2008 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#include <common.h> + +#include <asm/io.h> +#include <asm/arch/memory-map.h> +#include <asm/arch/gpio.h> + +void portmux_select_peripheral(void *port, unsigned long pin_mask, + enum portmux_function func, unsigned long flags) +{ + if (flags & PORTMUX_PULL_UP) + pio_writel(port, PUER, pin_mask); + else + pio_writel(port, PUDR, pin_mask); + + switch (func) { + case PORTMUX_FUNC_A: + pio_writel(port, ASR, pin_mask); + break; + case PORTMUX_FUNC_B: + pio_writel(port, BSR, pin_mask); + break; + } + + pio_writel(port, PDR, pin_mask); +} + +void portmux_select_gpio(void *port, unsigned long pin_mask, + unsigned long flags) +{ + if (flags & PORTMUX_PULL_UP) + pio_writel(port, PUER, pin_mask); + else + pio_writel(port, PUDR, pin_mask); + + if (flags & PORTMUX_OPEN_DRAIN) + pio_writel(port, MDER, pin_mask); + else + pio_writel(port, MDDR, pin_mask); + + if (flags & PORTMUX_DIR_OUTPUT) { + if (flags & PORTMUX_INIT_HIGH) + pio_writel(port, SODR, pin_mask); + else + pio_writel(port, CODR, pin_mask); + pio_writel(port, OER, pin_mask); + } else { + pio_writel(port, ODR, pin_mask); + } + + pio_writel(port, PER, pin_mask); +} + +void pio_set_output_value(unsigned int pin, int value) +{ + void *port = pio_pin_to_port(pin); + + if (!port) + panic("Invalid GPIO pin %u\n", pin); + + __pio_set_output_value(port, pin & 0x1f, value); +} + +int pio_get_input_value(unsigned int pin) +{ + void *port = pio_pin_to_port(pin); + + if (!port) + panic("Invalid GPIO pin %u\n", pin); + + return __pio_get_input_value(port, pin & 0x1f); +} diff --git a/doc/README.AVR32-port-muxing b/doc/README.AVR32-port-muxing new file mode 100644 index 0000000..b53799d --- /dev/null +++ b/doc/README.AVR32-port-muxing @@ -0,0 +1,208 @@ +AVR32 Port multiplexer configuration +==================================== + +On AVR32 chips, most external I/O pins are routed through a port +multiplexer. There are currently two kinds of port multiplexer +hardware around with different register interfaces: + + * PIO (AT32AP700x; this is also used on ARM AT91 chips) + * GPIO (all other AVR32 chips) + +The "PIO" variant supports multiplexing up to two peripherals per pin +in addition to GPIO (software control). Each pin has configurable +pull-up, glitch filter, interrupt and multi-drive capabilities. + +The "GPIO" variant supports multiplexing up to four peripherals per +pin in addition to GPIO. Each pin has configurable +pull-up/pull-down/buskeeper, glitch filter, interrupt, open-drain and +schmitt-trigger capabilities, as well as configurable drive strength +and slew rate control. + +Both controllers are configured using the same API, but the functions +may accept different values for some parameters depending on the +actual portmux implementation, and some parameters may be ignored by +one of the implementation (e.g. the "PIO" implementation will ignore +the drive strength flags since the hardware doesn't support +configurable drive strength.) + +Selecting the portmux implementation +------------------------------------ +Since u-boot is lacking a Kconfig-style configuration engine, the +portmux implementation must be selected manually by defining one of +the following symbols: + + CONFIG_PORTMUX_PIO + CONFIG_PORTMUX_GPIO + +depending on which implementation the chip in question uses. + +Identifying pins +---------------- +The portmux configuration functions described below identify the pins +to act on based on two parameters: A "port" (i.e. a block of pins +that somehow belong together) and a pin mask. Both are defined in an +implementation-specific manner. + +The available ports are defined on the form + + #define PORTMUX_PORT_A (something) + +where "A" matches the identifier given in the chip's data sheet, and +"something" is whatever the portmux implementation needs to identify +the port (usually a memory address). + +The pin mask is a bitmask where each '1' bit indicates a pin to apply +the current operation to. The width of the bitmask may vary from port +to port, but it is never wider than 32 bits (which is the width of +'unsigned long' on avr32). + +Selecting functions +------------------- +Each pin can either be assigned to one of a predefined set of on-chip +peripherals, or it can be set up to be controlled by software. For the +former case, the portmux implementation defines an enum containing all +the possible peripheral functions that can be selected. For example, +the PIO implementation, which allows multiplexing two peripherals per +pin, defines it like this: + + enum portmux_function { + PORTMUX_FUNC_A, + PORTMUX_FUNC_B, + }; + +To configure a set of pins to be connected to a given peripheral +function, the following function is used. + + void portmux_select_peripheral(void *port, unsigned long pin_mask, + enum portmux_function func, unsigned long flags); + +To configure a set of pins to be controlled by software (GPIO), the +following function is used. In this case, no "function" argument is +required since "GPIO" is a function in its own right. + + void portmux_select_gpio(void *port, unsigned int pin_mask, + unsigned long flags); + +Both of these functions take a "flags" parameter which may be used to +alter the default configuration of the pin. This is a bitmask of +various flags defined in an implementation-specific way, but the names +of the flags are the same on all implementations. + + PORTMUX_DIR_OUTPUT + PORTMUX_DIR_INPUT + +These mutually-exlusive flags configure the initial direction of the +pins. PORTMUX_DIR_OUTPUT means that the pins are driven by the CPU, +while PORTMUX_DIR_INPUT means that the pins are tristated by the CPU. +These flags are ignored by portmux_select_peripheral(). + + PORTMUX_INIT_HIGH + PORTMUX_INIT_LOW + +These mutually-exclusive flags configure the initial state of the +pins: High (Vdd) or low (Vss). They are only effective when +portmux_select_gpio() is called with the PORTMUX_DIR_OUTPUT flag set. + + PORTMUX_PULL_UP + PORTMUX_PULL_DOWN + PORTMUX_BUSKEEPER + +These mutually-exclusive flags are used to enable any on-chip CMOS +resistors connected to the pins. PORTMUX_PULL_UP causes the pins to be +pulled up to Vdd, PORTMUX_PULL_DOWN causes the pins to be pulled down +to Vss, and PORTMUX_BUSKEEPER will keep the pins in whatever state +they were left in by whatever was driving them last. If none of the +flags are specified, the pins are left floating if no one are driving +them; this is only recommended for always-output pins (e.g. extern +address and control lines driven by the CPU.) + +Note that the "PIO" implementation will silently ignore the +PORTMUX_PULL_DOWN flag and interpret PORTMUX_BUSKEEPER as +PORTMUX_PULL_UP. + + PORTMUX_DRIVE_MIN + PORTMUX_DRIVE_LOW + PORTMUX_DRIVE_HIGH + PORTMUX_DRIVE_MAX + +These mutually-exlusive flags determine the drive strength of the +pins. PORTMUX_DRIVE_MIN will give low power-consumption, but may cause +corruption of high-speed signals. PORTMUX_DRIVE_MAX will give high +power-consumption, but may be necessary on pins toggling at very high +speeds. PORTMUX_DRIVE_LOW and PORTMUX_DRIVE_HIGH specify something in +between the other two. + +Note that setting the drive strength too high may cause excessive +overshoot and EMI problems, which may in turn cause signal corruption. +Also note that the "PIO" implementation will silently ignore these +flags. + + PORTMUX_OPEN_DRAIN + +This flag will configure the pins as "open drain", i.e. setting the +pin state to 0 will drive it low, while setting it to 1 will leave it +floating (or, in most cases, let it be pulled high by an internal or +external pull-up resistor.) In the data sheet for chips using the +"PIO" variant, this mode is called "multi-driver". + +Enabling specific peripherals +----------------------------- +In addition to the above functions, each chip provides a set of +functions for setting up the port multiplexer to use a given +peripheral. The following are some of the functions available. + +All the functions below take a "drive_strength" parameter, which must +be one of the PORTMUX_DRIVE_x flags specified above. Any other +portmux flags will be silently filtered out. + +To set up the External Bus Interface (EBI), call + + void portmux_enable_ebi(unsigned int bus_width, + unsigned long flags, unsigned long drive_strength) + +where "bus_width" must be either 16 or 32. "flags" can be any +combination of the following flags. + + PORTMUX_EBI_CS(x) /* Enable chip select x */ + PORTMUX_EBI_NAND /* Enable NAND flash interface */ + PORTMUX_EBI_CF(x) /* Enable CompactFlash interface x */ + PORTMUX_EBI_NWAIT /* Enable NWAIT signal */ + +To set up a USART, call + + void portmux_enable_usartX(unsigned long drive_strength); + +where X is replaced by the USART instance to be configured. + +To set up an ethernet MAC: + + void portmux_enable_macbX(unsigned long flags, + unsigned long drive_strength); + +where X is replaced by the MACB instance to be configured. "flags" can +be any combination of the following flags. + + PORTMUX_MACB_RMII /* Just set up the RMII interface */ + PORTMUX_MACB_MII /* Set up full MII interface */ + PORTMUX_MACB_SPEED /* Enable the SPEED pin */ + +To set up the MMC controller: + + void portmux_enable_mmci(unsigned long slot, unsigned long flags + unsigned long drive_strength); + +where "slot" identifies which of the alternative SD card slots to +enable. "flags" can be any combination of the following flags: + + PORTMUX_MMCI_4BIT /* Enable 4-bit SD card interface */ + PORTMUX_MMCI_8BIT /* Enable 8-bit MMC+ interface */ + PORTMUX_MMCI_EXT_PULLUP /* Board has external pull-ups */ + +To set up a SPI controller: + + void portmux_enable_spiX(unsigned long cs_mask, + unsigned long drive_strength); + +where X is replaced by the SPI instance to be configured. "cs_mask" is +a 4-bit bitmask specifying which of the four standard chip select +lines to set up as GPIOs. diff --git a/include/asm-avr32/arch-at32ap700x/gpio.h b/include/asm-avr32/arch-at32ap700x/gpio.h index 8c922c7..303e353 100644 --- a/include/asm-avr32/arch-at32ap700x/gpio.h +++ b/include/asm-avr32/arch-at32ap700x/gpio.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2006 Atmel Corporation + * Copyright (C) 2006, 2008 Atmel Corporation * * See file CREDITS for list of people who contributed to this * project. @@ -31,161 +31,17 @@ * Pin numbers identifying specific GPIO pins on the chip. */ #define GPIO_PIOA_BASE (0) -#define GPIO_PIN_PA0 (GPIO_PIOA_BASE + 0) -#define GPIO_PIN_PA1 (GPIO_PIOA_BASE + 1) -#define GPIO_PIN_PA2 (GPIO_PIOA_BASE + 2) -#define GPIO_PIN_PA3 (GPIO_PIOA_BASE + 3) -#define GPIO_PIN_PA4 (GPIO_PIOA_BASE + 4) -#define GPIO_PIN_PA5 (GPIO_PIOA_BASE + 5) -#define GPIO_PIN_PA6 (GPIO_PIOA_BASE + 6) -#define GPIO_PIN_PA7 (GPIO_PIOA_BASE + 7) -#define GPIO_PIN_PA8 (GPIO_PIOA_BASE + 8) -#define GPIO_PIN_PA9 (GPIO_PIOA_BASE + 9) -#define GPIO_PIN_PA10 (GPIO_PIOA_BASE + 10) -#define GPIO_PIN_PA11 (GPIO_PIOA_BASE + 11) -#define GPIO_PIN_PA12 (GPIO_PIOA_BASE + 12) -#define GPIO_PIN_PA13 (GPIO_PIOA_BASE + 13) -#define GPIO_PIN_PA14 (GPIO_PIOA_BASE + 14) -#define GPIO_PIN_PA15 (GPIO_PIOA_BASE + 15) -#define GPIO_PIN_PA16 (GPIO_PIOA_BASE + 16) -#define GPIO_PIN_PA17 (GPIO_PIOA_BASE + 17) -#define GPIO_PIN_PA18 (GPIO_PIOA_BASE + 18) -#define GPIO_PIN_PA19 (GPIO_PIOA_BASE + 19) -#define GPIO_PIN_PA20 (GPIO_PIOA_BASE + 20) -#define GPIO_PIN_PA21 (GPIO_PIOA_BASE + 21) -#define GPIO_PIN_PA22 (GPIO_PIOA_BASE + 22) -#define GPIO_PIN_PA23 (GPIO_PIOA_BASE + 23) -#define GPIO_PIN_PA24 (GPIO_PIOA_BASE + 24) -#define GPIO_PIN_PA25 (GPIO_PIOA_BASE + 25) -#define GPIO_PIN_PA26 (GPIO_PIOA_BASE + 26) -#define GPIO_PIN_PA27 (GPIO_PIOA_BASE + 27) -#define GPIO_PIN_PA28 (GPIO_PIOA_BASE + 28) -#define GPIO_PIN_PA29 (GPIO_PIOA_BASE + 29) -#define GPIO_PIN_PA30 (GPIO_PIOA_BASE + 30) -#define GPIO_PIN_PA31 (GPIO_PIOA_BASE + 31) - #define GPIO_PIOB_BASE (GPIO_PIOA_BASE + 32) -#define GPIO_PIN_PB0 (GPIO_PIOB_BASE + 0) -#define GPIO_PIN_PB1 (GPIO_PIOB_BASE + 1) -#define GPIO_PIN_PB2 (GPIO_PIOB_BASE + 2) -#define GPIO_PIN_PB3 (GPIO_PIOB_BASE + 3) -#define GPIO_PIN_PB4 (GPIO_PIOB_BASE + 4) -#define GPIO_PIN_PB5 (GPIO_PIOB_BASE + 5) -#define GPIO_PIN_PB6 (GPIO_PIOB_BASE + 6) -#define GPIO_PIN_PB7 (GPIO_PIOB_BASE + 7) -#define GPIO_PIN_PB8 (GPIO_PIOB_BASE + 8) -#define GPIO_PIN_PB9 (GPIO_PIOB_BASE + 9) -#define GPIO_PIN_PB10 (GPIO_PIOB_BASE + 10) -#define GPIO_PIN_PB11 (GPIO_PIOB_BASE + 11) -#define GPIO_PIN_PB12 (GPIO_PIOB_BASE + 12) -#define GPIO_PIN_PB13 (GPIO_PIOB_BASE + 13) -#define GPIO_PIN_PB14 (GPIO_PIOB_BASE + 14) -#define GPIO_PIN_PB15 (GPIO_PIOB_BASE + 15) -#define GPIO_PIN_PB16 (GPIO_PIOB_BASE + 16) -#define GPIO_PIN_PB17 (GPIO_PIOB_BASE + 17) -#define GPIO_PIN_PB18 (GPIO_PIOB_BASE + 18) -#define GPIO_PIN_PB19 (GPIO_PIOB_BASE + 19) -#define GPIO_PIN_PB20 (GPIO_PIOB_BASE + 20) -#define GPIO_PIN_PB21 (GPIO_PIOB_BASE + 21) -#define GPIO_PIN_PB22 (GPIO_PIOB_BASE + 22) -#define GPIO_PIN_PB23 (GPIO_PIOB_BASE + 23) -#define GPIO_PIN_PB24 (GPIO_PIOB_BASE + 24) -#define GPIO_PIN_PB25 (GPIO_PIOB_BASE + 25) -#define GPIO_PIN_PB26 (GPIO_PIOB_BASE + 26) -#define GPIO_PIN_PB27 (GPIO_PIOB_BASE + 27) -#define GPIO_PIN_PB28 (GPIO_PIOB_BASE + 28) -#define GPIO_PIN_PB29 (GPIO_PIOB_BASE + 29) -#define GPIO_PIN_PB30 (GPIO_PIOB_BASE + 30) - #define GPIO_PIOC_BASE (GPIO_PIOB_BASE + 32) -#define GPIO_PIN_PC0 (GPIO_PIOC_BASE + 0) -#define GPIO_PIN_PC1 (GPIO_PIOC_BASE + 1) -#define GPIO_PIN_PC2 (GPIO_PIOC_BASE + 2) -#define GPIO_PIN_PC3 (GPIO_PIOC_BASE + 3) -#define GPIO_PIN_PC4 (GPIO_PIOC_BASE + 4) -#define GPIO_PIN_PC5 (GPIO_PIOC_BASE + 5) -#define GPIO_PIN_PC6 (GPIO_PIOC_BASE + 6) -#define GPIO_PIN_PC7 (GPIO_PIOC_BASE + 7) -#define GPIO_PIN_PC8 (GPIO_PIOC_BASE + 8) -#define GPIO_PIN_PC9 (GPIO_PIOC_BASE + 9) -#define GPIO_PIN_PC10 (GPIO_PIOC_BASE + 10) -#define GPIO_PIN_PC11 (GPIO_PIOC_BASE + 11) -#define GPIO_PIN_PC12 (GPIO_PIOC_BASE + 12) -#define GPIO_PIN_PC13 (GPIO_PIOC_BASE + 13) -#define GPIO_PIN_PC14 (GPIO_PIOC_BASE + 14) -#define GPIO_PIN_PC15 (GPIO_PIOC_BASE + 15) -#define GPIO_PIN_PC16 (GPIO_PIOC_BASE + 16) -#define GPIO_PIN_PC17 (GPIO_PIOC_BASE + 17) -#define GPIO_PIN_PC18 (GPIO_PIOC_BASE + 18) -#define GPIO_PIN_PC19 (GPIO_PIOC_BASE + 19) -#define GPIO_PIN_PC20 (GPIO_PIOC_BASE + 20) -#define GPIO_PIN_PC21 (GPIO_PIOC_BASE + 21) -#define GPIO_PIN_PC22 (GPIO_PIOC_BASE + 22) -#define GPIO_PIN_PC23 (GPIO_PIOC_BASE + 23) -#define GPIO_PIN_PC24 (GPIO_PIOC_BASE + 24) -#define GPIO_PIN_PC25 (GPIO_PIOC_BASE + 25) -#define GPIO_PIN_PC26 (GPIO_PIOC_BASE + 26) -#define GPIO_PIN_PC27 (GPIO_PIOC_BASE + 27) -#define GPIO_PIN_PC28 (GPIO_PIOC_BASE + 28) -#define GPIO_PIN_PC29 (GPIO_PIOC_BASE + 29) -#define GPIO_PIN_PC30 (GPIO_PIOC_BASE + 30) -#define GPIO_PIN_PC31 (GPIO_PIOC_BASE + 31) - #define GPIO_PIOD_BASE (GPIO_PIOC_BASE + 32) -#define GPIO_PIN_PD0 (GPIO_PIOD_BASE + 0) -#define GPIO_PIN_PD1 (GPIO_PIOD_BASE + 1) -#define GPIO_PIN_PD2 (GPIO_PIOD_BASE + 2) -#define GPIO_PIN_PD3 (GPIO_PIOD_BASE + 3) -#define GPIO_PIN_PD4 (GPIO_PIOD_BASE + 4) -#define GPIO_PIN_PD5 (GPIO_PIOD_BASE + 5) -#define GPIO_PIN_PD6 (GPIO_PIOD_BASE + 6) -#define GPIO_PIN_PD7 (GPIO_PIOD_BASE + 7) -#define GPIO_PIN_PD8 (GPIO_PIOD_BASE + 8) -#define GPIO_PIN_PD9 (GPIO_PIOD_BASE + 9) -#define GPIO_PIN_PD10 (GPIO_PIOD_BASE + 10) -#define GPIO_PIN_PD11 (GPIO_PIOD_BASE + 11) -#define GPIO_PIN_PD12 (GPIO_PIOD_BASE + 12) -#define GPIO_PIN_PD13 (GPIO_PIOD_BASE + 13) -#define GPIO_PIN_PD14 (GPIO_PIOD_BASE + 14) -#define GPIO_PIN_PD15 (GPIO_PIOD_BASE + 15) -#define GPIO_PIN_PD16 (GPIO_PIOD_BASE + 16) -#define GPIO_PIN_PD17 (GPIO_PIOD_BASE + 17) - #define GPIO_PIOE_BASE (GPIO_PIOD_BASE + 32) -#define GPIO_PIN_PE0 (GPIO_PIOE_BASE + 0) -#define GPIO_PIN_PE1 (GPIO_PIOE_BASE + 1) -#define GPIO_PIN_PE2 (GPIO_PIOE_BASE + 2) -#define GPIO_PIN_PE3 (GPIO_PIOE_BASE + 3) -#define GPIO_PIN_PE4 (GPIO_PIOE_BASE + 4) -#define GPIO_PIN_PE5 (GPIO_PIOE_BASE + 5) -#define GPIO_PIN_PE6 (GPIO_PIOE_BASE + 6) -#define GPIO_PIN_PE7 (GPIO_PIOE_BASE + 7) -#define GPIO_PIN_PE8 (GPIO_PIOE_BASE + 8) -#define GPIO_PIN_PE9 (GPIO_PIOE_BASE + 9) -#define GPIO_PIN_PE10 (GPIO_PIOE_BASE + 10) -#define GPIO_PIN_PE11 (GPIO_PIOE_BASE + 11) -#define GPIO_PIN_PE12 (GPIO_PIOE_BASE + 12) -#define GPIO_PIN_PE13 (GPIO_PIOE_BASE + 13) -#define GPIO_PIN_PE14 (GPIO_PIOE_BASE + 14) -#define GPIO_PIN_PE15 (GPIO_PIOE_BASE + 15) -#define GPIO_PIN_PE16 (GPIO_PIOE_BASE + 16) -#define GPIO_PIN_PE17 (GPIO_PIOE_BASE + 17) -#define GPIO_PIN_PE18 (GPIO_PIOE_BASE + 18) -#define GPIO_PIN_PE19 (GPIO_PIOE_BASE + 19) -#define GPIO_PIN_PE20 (GPIO_PIOE_BASE + 20) -#define GPIO_PIN_PE21 (GPIO_PIOE_BASE + 21) -#define GPIO_PIN_PE22 (GPIO_PIOE_BASE + 22) -#define GPIO_PIN_PE23 (GPIO_PIOE_BASE + 23) -#define GPIO_PIN_PE24 (GPIO_PIOE_BASE + 24) -#define GPIO_PIN_PE25 (GPIO_PIOE_BASE + 25) -#define GPIO_PIN_PE26 (GPIO_PIOE_BASE + 26) +#define GPIO_PIN_PA(x) (GPIO_PIOA_BASE + (x)) +#define GPIO_PIN_PB(x) (GPIO_PIOB_BASE + (x)) +#define GPIO_PIN_PC(x) (GPIO_PIOC_BASE + (x)) +#define GPIO_PIN_PD(x) (GPIO_PIOD_BASE + (x)) +#define GPIO_PIN_PE(x) (GPIO_PIOE_BASE + (x))
-#define GPIOF_PULLUP 0x00000001 /* (not-OUT) Enable pull-up */ -#define GPIOF_OUTPUT 0x00000002 /* (OUT) Enable output driver */ -#define GPIOF_DEGLITCH 0x00000004 /* (IN) Filter glitches */ -#define GPIOF_MULTIDRV 0x00000008 /* Enable multidriver option */ - -static inline void *gpio_pin_to_addr(unsigned int pin) +static inline void *pio_pin_to_port(unsigned int pin) { switch (pin >> 5) { case 0: @@ -203,30 +59,6 @@ static inline void *gpio_pin_to_addr(unsigned int pin) } }
-void gpio_select_periph_A(unsigned int pin, int use_pullup); -void gpio_select_periph_B(unsigned int pin, int use_pullup); -void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags); -void gpio_set_value(unsigned int pin, int value); -int gpio_get_value(unsigned int pin); - -void gpio_enable_ebi(void); - -#ifdef AT32AP700x_CHIP_HAS_USART -void gpio_enable_usart0(void); -void gpio_enable_usart1(void); -void gpio_enable_usart2(void); -void gpio_enable_usart3(void); -#endif -#ifdef AT32AP700x_CHIP_HAS_MACB -void gpio_enable_macb0(void); -void gpio_enable_macb1(void); -#endif -#ifdef AT32AP700x_CHIP_HAS_MMCI -void gpio_enable_mmci(void); -#endif -#ifdef AT32AP700x_CHIP_HAS_SPI -void gpio_enable_spi0(unsigned long cs_mask); -void gpio_enable_spi1(unsigned long cs_mask); -#endif +#include <asm/arch-common/portmux-pio.h>
#endif /* __ASM_AVR32_ARCH_GPIO_H__ */ diff --git a/include/asm-avr32/arch-at32ap700x/portmux.h b/include/asm-avr32/arch-at32ap700x/portmux.h new file mode 100644 index 0000000..96fe70d --- /dev/null +++ b/include/asm-avr32/arch-at32ap700x/portmux.h @@ -0,0 +1,89 @@ +/* + * Copyright (C) 2006, 2008 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#ifndef __ASM_AVR32_ARCH_PORTMUX_H__ +#define __ASM_AVR32_ARCH_PORTMUX_H__ + +#include <asm/arch/gpio.h> + +#define PORTMUX_PORT_A ((void *)PIOA_BASE) +#define PORTMUX_PORT_B ((void *)PIOB_BASE) +#define PORTMUX_PORT_C ((void *)PIOC_BASE) +#define PORTMUX_PORT_D ((void *)PIOD_BASE) +#define PORTMUX_PORT_E ((void *)PIOE_BASE) + +void portmux_enable_ebi(unsigned int bus_width, unsigned int addr_width, + unsigned long flags, unsigned long drive_strength); + +#define PORTMUX_EBI_CS(x) (1 << (x)) +#define PORTMUX_EBI_NAND (1 << 6) +#define PORTMUX_EBI_CF(x) (1 << ((x) + 7)) +#define PORTMUX_EBI_NWAIT (1 << 9) + +#ifdef AT32AP700x_CHIP_HAS_USART +static inline void portmux_enable_usart0(unsigned long drive_strength) +{ + portmux_select_peripheral(PORTMUX_PORT_A, (1 << 8) | (1 << 9), + PORTMUX_FUNC_B, 0); +} + +static inline void portmux_enable_usart1(unsigned long drive_strength) +{ + portmux_select_peripheral(PORTMUX_PORT_A, (1 << 17) | (1 << 18), + PORTMUX_FUNC_A, 0); +} + +static inline void portmux_enable_usart2(unsigned long drive_strength) +{ + portmux_select_peripheral(PORTMUX_PORT_B, (1 << 26) | (1 << 27), + PORTMUX_FUNC_B, 0); +} + +static inline void portmux_enable_usart3(unsigned long drive_strength) +{ + portmux_select_peripheral(PORTMUX_PORT_B, (1 << 17) | (1 << 18), + PORTMUX_FUNC_B, 0); +} +#endif +#ifdef AT32AP700x_CHIP_HAS_MACB +void portmux_enable_macb0(unsigned long flags, unsigned long drive_strength); +void portmux_enable_macb1(unsigned long flags, unsigned long drive_strength); + +#define PORTMUX_MACB_RMII (0) +#define PORTMUX_MACB_MII (1 << 0) +#define PORTMUX_MACB_SPEED (1 << 1) + +#endif +#ifdef AT32AP700x_CHIP_HAS_MMCI +void portmux_enable_mmci(unsigned int slot, unsigned long flags, + unsigned long drive_strength); + +#define PORTMUX_MMCI_4BIT (1 << 0) +#define PORTMUX_MMCI_8BIT (PORTMUX_MMCI_4BIT | (1 << 1)) +#define PORTMUX_MMCI_EXT_PULLUP (1 << 2) + +#endif +#ifdef AT32AP700x_CHIP_HAS_SPI +void portmux_enable_spi0(unsigned long cs_mask, unsigned long drive_strength); +void portmux_enable_spi1(unsigned long cs_mask, unsigned long drive_strength); +#endif + +#endif /* __ASM_AVR32_ARCH_PORTMUX_H__ */ diff --git a/include/asm-avr32/arch-common/portmux-pio.h b/include/asm-avr32/arch-common/portmux-pio.h new file mode 100644 index 0000000..488924b --- /dev/null +++ b/include/asm-avr32/arch-common/portmux-pio.h @@ -0,0 +1,136 @@ +/* + * Copyright (C) 2006, 2008 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#ifndef __AVR32_PORTMUX_PIO_H__ +#define __AVR32_PORTMUX_PIO_H__ + +/* PIO register offsets */ +#define PIO_PER 0x0000 +#define PIO_PDR 0x0004 +#define PIO_PSR 0x0008 +#define PIO_OER 0x0010 +#define PIO_ODR 0x0014 +#define PIO_OSR 0x0018 +#define PIO_IFER 0x0020 +#define PIO_IFDR 0x0024 +#define PIO_ISFR 0x0028 +#define PIO_SODR 0x0030 +#define PIO_CODR 0x0034 +#define PIO_ODSR 0x0038 +#define PIO_PDSR 0x003c +#define PIO_IER 0x0040 +#define PIO_IDR 0x0044 +#define PIO_IMR 0x0048 +#define PIO_ISR 0x004c +#define PIO_MDER 0x0050 +#define PIO_MDDR 0x0054 +#define PIO_MDSR 0x0058 +#define PIO_PUDR 0x0060 +#define PIO_PUER 0x0064 +#define PIO_PUSR 0x0068 +#define PIO_ASR 0x0070 +#define PIO_BSR 0x0074 +#define PIO_ABSR 0x0078 +#define PIO_OWER 0x00a0 +#define PIO_OWDR 0x00a4 +#define PIO_OWSR 0x00a8 + +/* Hardware register access */ +#define pio_readl(base, reg) \ + __raw_readl((void *)base + PIO_##reg) +#define pio_writel(base, reg, value) \ + __raw_writel((value), (void *)base + PIO_##reg) + +/* Portmux API starts here. See doc/README.AVR32-port-muxing */ + +enum portmux_function { + PORTMUX_FUNC_A, + PORTMUX_FUNC_B, +}; + +/* Pull-down, buskeeper and drive strength are not supported */ +#define PORTMUX_DIR_INPUT (0 << 0) +#define PORTMUX_DIR_OUTPUT (1 << 0) +#define PORTMUX_INIT_LOW (0 << 1) +#define PORTMUX_INIT_HIGH (1 << 1) +#define PORTMUX_PULL_UP (1 << 2) +#define PORTMUX_PULL_DOWN (0) +#define PORTMUX_BUSKEEPER PORTMUX_PULL_UP +#define PORTMUX_DRIVE_MIN (0) +#define PORTMUX_DRIVE_LOW (0) +#define PORTMUX_DRIVE_HIGH (0) +#define PORTMUX_DRIVE_MAX (0) +#define PORTMUX_OPEN_DRAIN (1 << 3) + +void portmux_select_peripheral(void *port, unsigned long pin_mask, + enum portmux_function func, unsigned long flags); +void portmux_select_gpio(void *port, unsigned long pin_mask, + unsigned long flags); + +/* Internal helper functions */ + +static inline void __pio_set_output_value(void *port, unsigned int pin, + int value) +{ + /* + * value will usually be constant, but it's pretty cheap + * either way. + */ + if (value) + pio_writel(port, SODR, 1 << pin); + else + pio_writel(port, CODR, 1 << pin); +} + +static inline int __pio_get_input_value(void *port, unsigned int pin) +{ + return (pio_readl(port, PDSR) >> pin) & 1; +} + +void pio_set_output_value(unsigned int pin, int value); +int pio_get_input_value(unsigned int pin); + +/* GPIO API starts here */ + +/* + * GCC doesn't realize that the constant case is extremely trivial, + * so we need to help it make the right decision by using + * always_inline. + */ +__attribute__((always_inline)) +static inline void gpio_set_value(unsigned int pin, int value) +{ + if (__builtin_constant_p(pin)) + __pio_set_output_value(pio_pin_to_port(pin), pin & 0x1f, value); + else + pio_set_output_value(pin, value); +} + +__attribute__((always_inline)) +static inline int gpio_get_value(unsigned int pin) +{ + if (__builtin_constant_p(pin)) + return __pio_get_input_value(pio_pin_to_port(pin), pin & 0x1f); + else + return pio_get_input_value(pin); +} + +#endif /* __AVR32_PORTMUX_PIO_H__ */