diff options
| -rw-r--r-- | drivers/gpio/at91_gpio.c | 250 |
1 files changed, 138 insertions, 112 deletions
diff --git a/drivers/gpio/at91_gpio.c b/drivers/gpio/at91_gpio.c index 2322914..6d227d3 100644 --- a/drivers/gpio/at91_gpio.c +++ b/drivers/gpio/at91_gpio.c @@ -8,16 +8,6 @@ * SPDX-License-Identifier: GPL-2.0+ */ -/* - * WARNING: - * - * As the code is right now, it expects all PIO ports A,B,C,... - * to be evenly spaced in the memory map: - * ATMEL_BASE_PIOA + port * sizeof at91pio_t - * This might not necessaryly be true in future Atmel SoCs. - * This code should be fixed to use a pointer array to the ports. - */ - #include <config.h> #include <common.h> #include <asm/io.h> @@ -25,19 +15,42 @@ #include <asm/arch/hardware.h> #include <asm/arch/at91_pio.h> +static struct at91_port *at91_pio_get_port(unsigned port) +{ + switch (port) { + case AT91_PIO_PORTA: + return (struct at91_port *)ATMEL_BASE_PIOA; + case AT91_PIO_PORTB: + return (struct at91_port *)ATMEL_BASE_PIOB; + case AT91_PIO_PORTC: + return (struct at91_port *)ATMEL_BASE_PIOC; +#if (ATMEL_PIO_PORTS > 3) + case AT91_PIO_PORTD: + return (struct at91_port *)ATMEL_BASE_PIOD; +#if (ATMEL_PIO_PORTS > 4) + case AT91_PIO_PORTE: + return (struct at91_port *)ATMEL_BASE_PIOE; +#endif +#endif + default: + return NULL; + } +} + int at91_set_pio_pullup(unsigned port, unsigned pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; if (use_pullup) - writel(1 << pin, &pio->port[port].puer); + writel(1 << pin, &at91_port->puer); else - writel(1 << pin, &pio->port[port].pudr); - writel(mask, &pio->port[port].per); + writel(1 << pin, &at91_port->pudr); + writel(mask, &at91_port->per); } + return 0; } @@ -46,15 +59,16 @@ int at91_set_pio_pullup(unsigned port, unsigned pin, int use_pullup) */ int at91_set_pio_periph(unsigned port, unsigned pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); + writel(mask, &at91_port->idr); at91_set_pio_pullup(port, pin, use_pullup); - writel(mask, &pio->port[port].per); + writel(mask, &at91_port->per); } + return 0; } @@ -63,23 +77,24 @@ int at91_set_pio_periph(unsigned port, unsigned pin, int use_pullup) */ int at91_set_a_periph(unsigned port, unsigned pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); + writel(mask, &at91_port->idr); at91_set_pio_pullup(port, pin, use_pullup); #if defined(CPU_HAS_PIO3) - writel(readl(&pio->port[port].abcdsr1) & ~mask, - &pio->port[port].abcdsr1); - writel(readl(&pio->port[port].abcdsr2) & ~mask, - &pio->port[port].abcdsr2); + writel(readl(&at91_port->abcdsr1) & ~mask, + &at91_port->abcdsr1); + writel(readl(&at91_port->abcdsr2) & ~mask, + &at91_port->abcdsr2); #else - writel(mask, &pio->port[port].asr); + writel(mask, &at91_port->asr); #endif - writel(mask, &pio->port[port].pdr); + writel(mask, &at91_port->pdr); } + return 0; } @@ -88,23 +103,24 @@ int at91_set_a_periph(unsigned port, unsigned pin, int use_pullup) */ int at91_set_b_periph(unsigned port, unsigned pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); + writel(mask, &at91_port->idr); at91_set_pio_pullup(port, pin, use_pullup); #if defined(CPU_HAS_PIO3) - writel(readl(&pio->port[port].abcdsr1) | mask, - &pio->port[port].abcdsr1); - writel(readl(&pio->port[port].abcdsr2) & ~mask, - &pio->port[port].abcdsr2); + writel(readl(&at91_port->abcdsr1) | mask, + &at91_port->abcdsr1); + writel(readl(&at91_port->abcdsr2) & ~mask, + &at91_port->abcdsr2); #else - writel(mask, &pio->port[port].bsr); + writel(mask, &at91_port->bsr); #endif - writel(mask, &pio->port[port].pdr); + writel(mask, &at91_port->pdr); } + return 0; } @@ -114,19 +130,20 @@ int at91_set_b_periph(unsigned port, unsigned pin, int use_pullup) */ int at91_set_c_periph(unsigned port, unsigned pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); + writel(mask, &at91_port->idr); at91_set_pio_pullup(port, pin, use_pullup); - writel(readl(&pio->port[port].abcdsr1) & ~mask, - &pio->port[port].abcdsr1); - writel(readl(&pio->port[port].abcdsr2) | mask, - &pio->port[port].abcdsr2); - writel(mask, &pio->port[port].pdr); + writel(readl(&at91_port->abcdsr1) & ~mask, + &at91_port->abcdsr1); + writel(readl(&at91_port->abcdsr2) | mask, + &at91_port->abcdsr2); + writel(mask, &at91_port->pdr); } + return 0; } @@ -135,19 +152,20 @@ int at91_set_c_periph(unsigned port, unsigned pin, int use_pullup) */ int at91_set_d_periph(unsigned port, unsigned pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); + writel(mask, &at91_port->idr); at91_set_pio_pullup(port, pin, use_pullup); - writel(readl(&pio->port[port].abcdsr1) | mask, - &pio->port[port].abcdsr1); - writel(readl(&pio->port[port].abcdsr2) | mask, - &pio->port[port].abcdsr2); - writel(mask, &pio->port[port].pdr); + writel(readl(&at91_port->abcdsr1) | mask, + &at91_port->abcdsr1); + writel(readl(&at91_port->abcdsr2) | mask, + &at91_port->abcdsr2); + writel(mask, &at91_port->pdr); } + return 0; } #endif @@ -158,16 +176,17 @@ int at91_set_d_periph(unsigned port, unsigned pin, int use_pullup) */ int at91_set_pio_input(unsigned port, u32 pin, int use_pullup) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); + writel(mask, &at91_port->idr); at91_set_pio_pullup(port, pin, use_pullup); - writel(mask, &pio->port[port].odr); - writel(mask, &pio->port[port].per); + writel(mask, &at91_port->odr); + writel(mask, &at91_port->per); } + return 0; } @@ -177,20 +196,21 @@ int at91_set_pio_input(unsigned port, u32 pin, int use_pullup) */ int at91_set_pio_output(unsigned port, u32 pin, int value) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].idr); - writel(mask, &pio->port[port].pudr); + writel(mask, &at91_port->idr); + writel(mask, &at91_port->pudr); if (value) - writel(mask, &pio->port[port].sodr); + writel(mask, &at91_port->sodr); else - writel(mask, &pio->port[port].codr); - writel(mask, &pio->port[port].oer); - writel(mask, &pio->port[port].per); + writel(mask, &at91_port->codr); + writel(mask, &at91_port->oer); + writel(mask, &at91_port->per); } + return 0; } @@ -199,20 +219,21 @@ int at91_set_pio_output(unsigned port, u32 pin, int value) */ int at91_set_pio_deglitch(unsigned port, unsigned pin, int is_on) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; if (is_on) { #if defined(CPU_HAS_PIO3) - writel(mask, &pio->port[port].ifscdr); + writel(mask, &at91_port->ifscdr); #endif - writel(mask, &pio->port[port].ifer); + writel(mask, &at91_port->ifer); } else { - writel(mask, &pio->port[port].ifdr); + writel(mask, &at91_port->ifdr); } } + return 0; } @@ -222,19 +243,20 @@ int at91_set_pio_deglitch(unsigned port, unsigned pin, int is_on) */ int at91_set_pio_debounce(unsigned port, unsigned pin, int is_on, int div) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; if (is_on) { - writel(mask, &pio->port[port].ifscer); - writel(div & PIO_SCDR_DIV, &pio->port[port].scdr); - writel(mask, &pio->port[port].ifer); + writel(mask, &at91_port->ifscer); + writel(div & PIO_SCDR_DIV, &at91_port->scdr); + writel(mask, &at91_port->ifer); } else { - writel(mask, &pio->port[port].ifdr); + writel(mask, &at91_port->ifdr); } } + return 0; } @@ -244,17 +266,18 @@ int at91_set_pio_debounce(unsigned port, unsigned pin, int is_on, int div) */ int at91_set_pio_pulldown(unsigned port, unsigned pin, int is_on) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(mask, &pio->port[port].pudr); + writel(mask, &at91_port->pudr); if (is_on) - writel(mask, &pio->port[port].ppder); + writel(mask, &at91_port->ppder); else - writel(mask, &pio->port[port].ppddr); + writel(mask, &at91_port->ppddr); } + return 0; } @@ -263,14 +286,15 @@ int at91_set_pio_pulldown(unsigned port, unsigned pin, int is_on) */ int at91_set_pio_disable_schmitt_trig(unsigned port, unsigned pin) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - writel(readl(&pio->port[port].schmitt) | mask, - &pio->port[port].schmitt); + writel(readl(&at91_port->schmitt) | mask, + &at91_port->schmitt); } + return 0; } #endif @@ -281,16 +305,17 @@ int at91_set_pio_disable_schmitt_trig(unsigned port, unsigned pin) */ int at91_set_pio_multi_drive(unsigned port, unsigned pin, int is_on) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; if (is_on) - writel(mask, &pio->port[port].mder); + writel(mask, &at91_port->mder); else - writel(mask, &pio->port[port].mddr); + writel(mask, &at91_port->mddr); } + return 0; } @@ -299,16 +324,17 @@ int at91_set_pio_multi_drive(unsigned port, unsigned pin, int is_on) */ int at91_set_pio_value(unsigned port, unsigned pin, int value) { - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; if (value) - writel(mask, &pio->port[port].sodr); + writel(mask, &at91_port->sodr); else - writel(mask, &pio->port[port].codr); + writel(mask, &at91_port->codr); } + return 0; } @@ -317,13 +343,13 @@ int at91_set_pio_value(unsigned port, unsigned pin, int value) */ int at91_get_pio_value(unsigned port, unsigned pin) { - u32 pdsr = 0; - at91_pio_t *pio = (at91_pio_t *) ATMEL_BASE_PIOA; - u32 mask; + struct at91_port *at91_port = at91_pio_get_port(port); + u32 pdsr = 0, mask; - if ((port < ATMEL_PIO_PORTS) && (pin < 32)) { + if (at91_port && (pin < 32)) { mask = 1 << pin; - pdsr = readl(&pio->port[port].pdsr) & mask; + pdsr = readl(&at91_port->pdsr) & mask; } + return pdsr != 0; } |