src: Rename source folders for atsam and atsamd architectures

Signed-off-by: Florian Heilmann <Florian.Heilmann@gmx.net>

1 files changed, 77 insertions, 0 deletions

diff --git a/src/atsam/serial.c b/src/atsam/serial.c
new file mode 100644
index 00000000..c87539ad
--- /dev/null
+++ b/src/atsam/serial.c
@@ -0,0 +1,77 @@
+// sam3/sam4 serial port
+//
+// Copyright (C) 2016-2018  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include "autoconf.h" // CONFIG_SERIAL_BAUD
+#include "board/serial_irq.h" // serial_rx_data
+#include "internal.h" // gpio_peripheral
+#include "sched.h" // DECL_INIT
+
+// Serial port pins
+#if CONFIG_MACH_SAM3X8E
+#define Serial_IRQ_Handler UART_Handler
+static Uart * const Port = UART;
+static const uint32_t Pmc_id = ID_UART, Irq_id = UART_IRQn;
+static const uint32_t rx_pin = GPIO('A', 8);
+static const uint32_t tx_pin = GPIO('A', 9);
+#elif CONFIG_MACH_SAM4S8C
+#define Serial_IRQ_Handler UART1_Handler
+static Uart * const Port = UART1;
+static const uint32_t Pmc_id = ID_UART1, Irq_id = UART1_IRQn;
+static const uint32_t rx_pin = GPIO('B', 2);
+static const uint32_t tx_pin = GPIO('B', 3);
+#elif CONFIG_MACH_SAM4E8E
+#define Serial_IRQ_Handler UART0_Handler
+static Uart * const Port = UART0;
+static const uint32_t Pmc_id = ID_UART0, Irq_id = UART0_IRQn;
+static const uint32_t rx_pin = GPIO('A', 9);
+static const uint32_t tx_pin = GPIO('A', 10);
+#endif
+
+void
+serial_init(void)
+{
+    gpio_peripheral(rx_pin, 'A', 1);
+    gpio_peripheral(tx_pin, 'A', 0);
+
+    // Reset uart
+    enable_pclock(Pmc_id);
+    Port->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
+    Port->UART_CR = (UART_CR_RSTRX | UART_CR_RSTTX
+                     | UART_CR_RXDIS | UART_CR_TXDIS);
+    Port->UART_IDR = 0xFFFFFFFF;
+
+    // Enable uart
+    Port->UART_MR = (US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_NO
+                     | UART_MR_CHMODE_NORMAL);
+    Port->UART_BRGR = SystemCoreClock / (16 * CONFIG_SERIAL_BAUD);
+    Port->UART_IER = UART_IER_RXRDY;
+    NVIC_EnableIRQ(Irq_id);
+    NVIC_SetPriority(Irq_id, 0);
+    Port->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
+}
+DECL_INIT(serial_init);
+
+void __visible
+Serial_IRQ_Handler(void)
+{
+    uint32_t status = Port->UART_SR;
+    if (status & UART_SR_RXRDY)
+        serial_rx_byte(Port->UART_RHR);
+    if (status & UART_SR_TXRDY) {
+        uint8_t data;
+        int ret = serial_get_tx_byte(&data);
+        if (ret)
+            Port->UART_IDR = UART_IDR_TXRDY;
+        else
+            Port->UART_THR = data;
+    }
+}
+
+void
+serial_enable_tx_irq(void)
+{
+    Port->UART_IER = UART_IDR_TXRDY;
+}