atsam: Convert code to use armcm_timer

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 0 insertions, 118 deletions

diff --git a/src/atsam/sam4s_timer.c b/src/atsam/sam4s_timer.c
deleted file mode 100644
index a051f08c..00000000
--- a/src/atsam/sam4s_timer.c
+++ /dev/null
@@ -1,118 +0,0 @@
-// SAM4s 16bit timer interrupt scheduling
-//
-// Copyright (C) 2016-2018  Kevin O'Connor <kevin@koconnor.net>
-//
-// This file may be distributed under the terms of the GNU GPLv3 license.
-
-#include "board/io.h" // readl
-#include "board/irq.h" // irq_disable
-#include "board/misc.h" // timer_read_time
-#include "board/timer_irq.h" // timer_dispatch_many
-#include "command.h" // DECL_SHUTDOWN
-#include "internal.h" // TC0
-#include "sched.h" // DECL_INIT
-
-
-/****************************************************************
- * Low level timer code
- ****************************************************************/
-
-// Get the 16bit timer value
-static uint32_t
-timer_get(void)
-{
-    return TC0->TC_CHANNEL[0].TC_CV;
-}
-
-// Set the next irq time
-static void
-timer_set(uint32_t value)
-{
-    TC0->TC_CHANNEL[0].TC_RA = value;
-}
-
-// Activate timer dispatch as soon as possible
-void
-timer_kick(void)
-{
-    timer_set(timer_read_time() + 50);
-}
-
-
-/****************************************************************
- * 16bit hardware timer to 32bit conversion
- ****************************************************************/
-
-// High bits of timer (top 17 bits)
-static uint32_t timer_high;
-
-// Return the current time (in absolute clock ticks).
-uint32_t __always_inline
-timer_read_time(void)
-{
-    uint32_t th = readl(&timer_high);
-    uint32_t cur = timer_get();
-    // Combine timer_high (high 17 bits) and current time (low 16
-    // bits) using method that handles rollovers correctly.
-    return (th ^ cur) + (th & 0x8000);
-}
-
-// Update timer_high every 0x8000 clock ticks
-static uint_fast8_t
-timer_event(struct timer *t)
-{
-    timer_high += 0x8000;
-    t->waketime = timer_high + 0x8000;
-    return SF_RESCHEDULE;
-}
-static struct timer wrap_timer = {
-    .func = timer_event,
-    .waketime = 0x8000,
-};
-
-void
-timer_reset(void)
-{
-    sched_add_timer(&wrap_timer);
-}
-DECL_SHUTDOWN(timer_reset);
-
-
-/****************************************************************
- * Timer init
- ****************************************************************/
-
-void
-timer_init(void)
-{
-    TcChannel *tc = &TC0->TC_CHANNEL[0];
-    // Reset the timer
-    tc->TC_CCR = TC_CCR_CLKDIS;
-    tc->TC_IDR = 0xFFFFFFFF;
-    // Enable it
-    enable_pclock(ID_TC0);
-    tc->TC_CMR = TC_CMR_WAVE | TC_CMR_WAVSEL_UP | TC_CMR_TCCLKS_TIMER_CLOCK2;
-    tc->TC_IER = TC_IER_CPAS;
-    NVIC_SetPriority(TC0_IRQn, 2);
-    NVIC_EnableIRQ(TC0_IRQn);
-    timer_kick();
-    timer_reset();
-    tc->TC_CCR = TC_CCR_CLKEN | TC_CCR_SWTRG;
-}
-DECL_INIT(timer_init);
-
-
-/****************************************************************
- * Main timer dispatch irq handler
- ****************************************************************/
-
-// IRQ handler
-void __visible __aligned(16) // aligning helps stabilize perf benchmarks
-TC0_Handler(void)
-{
-    irq_disable();
-    uint32_t next = timer_dispatch_many();
-    timer_set(next);
-    TC0->TC_CHANNEL[0].TC_SR; // read to clear irq pending
-    irq_enable();
-}