1 files changed, 0 insertions, 141 deletions
diff --git a/src/samd21/gpio.c b/src/samd21/gpio.c
deleted file mode 100644
index 045dc003..00000000
--- a/src/samd21/gpio.c
+++ /dev/null
@@ -1,141 +0,0 @@
-// samd21 gpio functions
-//
-// Copyright (C) 2018  Kevin O'Connor <kevin@koconnor.net>
-//
-// This file may be distributed under the terms of the GNU GPLv3 license.
-
-#include <string.h> // ffs
-#include "board/irq.h" // irq_save
-#include "command.h" // shutdown
-#include "gpio.h" // gpio_out_setup
-#include "internal.h" // gpio_peripheral
-#include "samd21.h" // PORT
-#include "sched.h" // sched_shutdown
-
-
-/****************************************************************
- * Pin multiplexing
- ****************************************************************/
-
-void
-gpio_peripheral(uint32_t gpio, char ptype, int32_t pull_up)
-{
-    uint32_t bank = GPIO2PORT(gpio), bit = gpio % 32;
-    PortGroup *pg = &PORT->Group[bank];
-    if (ptype) {
-        volatile uint8_t *pmux = &pg->PMUX[bit/2].reg;
-        uint8_t shift = (bit & 1) ? 4 : 0, mask = ~(0xf << shift);
-        *pmux = (*pmux & mask) | ((ptype - 'A') << shift);
-    }
-    if (pull_up) {
-        if (pull_up > 0)
-            pg->OUTSET.reg = (1<<bit);
-        else
-            pg->OUTCLR.reg = (1<<bit);
-    }
-
-    pg->PINCFG[bit].reg = ((ptype ? PORT_PINCFG_PMUXEN : 0)
-                           | (pull_up ? PORT_PINCFG_PULLEN : 0));
-}
-
-
-/****************************************************************
- * General Purpose Input Output (GPIO) pins
- ****************************************************************/
-
-#define NUM_PORT 2
-
-struct gpio_out
-gpio_out_setup(uint8_t pin, uint8_t val)
-{
-    if (GPIO2PORT(pin) >= NUM_PORT)
-        goto fail;
-    PortGroup *pg = &PORT->Group[GPIO2PORT(pin)];
-    struct gpio_out g = { .regs=pg, .bit=GPIO2BIT(pin) };
-    gpio_out_reset(g, val);
-    return g;
-fail:
-    shutdown("Not an output pin");
-}
-
-static void
-set_pincfg(PortGroup *pg, uint32_t bit, uint8_t cfg)
-{
-    pg->PINCFG[ffs(bit)-1].reg = cfg;
-}
-
-void
-gpio_out_reset(struct gpio_out g, uint8_t val)
-{
-    PortGroup *pg = g.regs;
-    irqstatus_t flag = irq_save();
-    if (val)
-        pg->OUTSET.reg = g.bit;
-    else
-        pg->OUTCLR.reg = g.bit;
-    pg->DIRSET.reg = g.bit;
-    set_pincfg(pg, g.bit, 0);
-    irq_restore(flag);
-}
-
-void
-gpio_out_toggle_noirq(struct gpio_out g)
-{
-    PortGroup *pg = g.regs;
-    pg->OUTTGL.reg = g.bit;
-}
-
-void
-gpio_out_toggle(struct gpio_out g)
-{
-    gpio_out_toggle_noirq(g);
-}
-
-void
-gpio_out_write(struct gpio_out g, uint8_t val)
-{
-    PortGroup *pg = g.regs;
-    if (val)
-        pg->OUTSET.reg = g.bit;
-    else
-        pg->OUTCLR.reg = g.bit;
-}
-
-
-struct gpio_in
-gpio_in_setup(uint8_t pin, int8_t pull_up)
-{
-    if (GPIO2PORT(pin) >= NUM_PORT)
-        goto fail;
-    PortGroup *pg = &PORT->Group[GPIO2PORT(pin)];
-    struct gpio_in g = { .regs=pg, .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)
-{
-    PortGroup *pg = g.regs;
-    irqstatus_t flag = irq_save();
-    uint32_t cfg = PORT_PINCFG_INEN;
-    if (pull_up) {
-        cfg |= PORT_PINCFG_PULLEN;
-        if (pull_up > 0)
-            pg->OUTSET.reg = g.bit;
-        else
-            pg->OUTCLR.reg = g.bit;
-    }
-    set_pincfg(pg, g.bit, cfg);
-    pg->DIRCLR.reg = g.bit;
-    irq_restore(flag);
-}
-
-uint8_t
-gpio_in_read(struct gpio_in g)
-{
-    PortGroup *pg = g.regs;
-    return !!(pg->IN.reg & g.bit);
-}