diff options
Diffstat (limited to 'src/sam4e8e/gpio.c')
| -rw-r--r-- | src/sam4e8e/gpio.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/src/sam4e8e/gpio.c b/src/sam4e8e/gpio.c deleted file mode 100644 index 3e2c9796..00000000 --- a/src/sam4e8e/gpio.c +++ /dev/null @@ -1,173 +0,0 @@ -// SAM4e8e GPIO port -// -// Copyright (C) 2018 Florian Heilmann <Florian.Heilmann@gmx.net> -// -// This file may be distributed under the terms of the GNU GPLv3 license. - -#include "board/irq.h" // irq_save -#include "command.h" // shutdown -#include "gpio.h" // gpio_out_setup -#include "internal.h" // gpio_peripheral -#include "sam4e.h" // Pio -#include "sched.h" // sched_shutdown - -static Pio * const digital_regs[] = { - PIOA, PIOB, PIOC, PIOD, PIOE -}; - - -/**************************************************************** - * Pin multiplexing - ****************************************************************/ - -void -gpio_peripheral(uint32_t gpio, char ptype, int32_t pull_up) -{ - uint32_t bank = GPIO2PORT(gpio), bit = GPIO2BIT(gpio); - Pio *regs = digital_regs[bank]; - regs ->PIO_IDR = bit; - - // Enable peripheral for pin - uint32_t sr; - - switch (ptype) { - case 'A': - sr = regs->PIO_ABCDSR[0]; - regs->PIO_ABCDSR[0] &= (~bit & sr); - sr = regs->PIO_ABCDSR[1]; - regs->PIO_ABCDSR[1] &= (~bit & sr); - break; - case 'B': - sr = regs->PIO_ABCDSR[0]; - regs->PIO_ABCDSR[0] = (bit | sr); - sr = regs->PIO_ABCDSR[1]; - regs->PIO_ABCDSR[1] &= (~bit & sr); - break; - case 'C': - sr = regs->PIO_ABCDSR[0]; - regs->PIO_ABCDSR[0] &= (~bit & sr); - sr = regs->PIO_ABCDSR[1]; - regs->PIO_ABCDSR[1] = (bit | sr); - break; - case 'D': - sr = regs->PIO_ABCDSR[0]; - regs->PIO_ABCDSR[0] = (bit | sr); - sr = regs->PIO_ABCDSR[1]; - regs->PIO_ABCDSR[1] = (bit | sr); - break; - } - - // Disable pin in IO controller - regs->PIO_PDR = bit; - - // Set pullup - if (pull_up > 0) { - regs->PIO_PUER = bit; - } else { - regs->PIO_PUDR = bit; - } -} - - -/**************************************************************** - * General Purpose Input Output (GPIO) pins - ****************************************************************/ - -struct gpio_out -gpio_out_setup(uint8_t pin, uint8_t val) -{ - if (GPIO2PORT(pin) >= ARRAY_SIZE(digital_regs)) - goto fail; - uint32_t port = GPIO2PORT(pin); - Pio *regs = digital_regs[port]; - uint32_t bank_id = ID_PIOA + port; - if ((PMC->PMC_PCSR0 & (1u << bank_id)) == 0) { - PMC->PMC_PCER0 = 1 << bank_id; - } - struct gpio_out g = { .regs=regs, .bit=GPIO2BIT(pin) }; - gpio_out_reset(g, val); - return g; -fail: - shutdown("Not an output pin"); -} - -void -gpio_out_reset(struct gpio_out g, uint8_t val) -{ - Pio *regs = g.regs; - irqstatus_t flag = irq_save(); - if (val) - regs->PIO_SODR = g.bit; - else - regs->PIO_CODR = g.bit; - regs->PIO_OER = g.bit; - regs->PIO_OWER = g.bit; - regs->PIO_PER = g.bit; - regs->PIO_PUDR = g.bit; - irq_restore(flag); -} - -void -gpio_out_toggle_noirq(struct gpio_out g) -{ - Pio *regs = g.regs; - regs->PIO_ODSR ^= g.bit; -} - -void -gpio_out_toggle(struct gpio_out g) -{ - irqstatus_t flag = irq_save(); - gpio_out_toggle_noirq(g); - irq_restore(flag); -} - -void -gpio_out_write(struct gpio_out g, uint8_t val) -{ - Pio *regs = g.regs; - if (val) - regs->PIO_SODR = g.bit; - else - regs->PIO_CODR = g.bit; -} - -struct gpio_in -gpio_in_setup(uint8_t pin, int8_t pull_up) -{ - if (GPIO2PORT(pin) >= ARRAY_SIZE(digital_regs)) - goto fail; - uint32_t port = GPIO2PORT(pin); - Pio *regs = digital_regs[port]; - uint32_t bank_id = ID_PIOA + port; - if ((PMC->PMC_PCSR0 & (1u << bank_id)) == 0) { - PMC->PMC_PCER0 = 1 << bank_id; - } - struct gpio_in g = { .regs=regs, .bit=GPIO2BIT(pin) }; - gpio_in_reset(g, pull_up); - return g; -fail: - shutdown("Not an input pin"); -} - -void -gpio_in_reset(struct gpio_in g, int8_t pull_up) -{ - Pio *regs = g.regs; - irqstatus_t flag = irq_save(); - regs->PIO_IDR = g.bit; - if (pull_up) - regs->PIO_PUER = g.bit; - else - regs->PIO_PUDR = g.bit; - regs->PIO_ODR = g.bit; - regs->PIO_PER = g.bit; - irq_restore(flag); -} - -uint8_t -gpio_in_read(struct gpio_in g) -{ - Pio *regs = g.regs; - return !!(regs->PIO_PDSR & g.bit); -} |