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atsamd: Add support for SAMC21

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Signed-off-by: Luke Vuksta <wulfstawulfsta@gmail.com>
This commit is contained in:
Wulfsta
2023-01-16 01:32:31 -05:00
committed by KevinOConnor
parent 06e5c577bd
commit 3b0729c949
13 changed files with 311 additions and 31 deletions
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22
src/atsamd/fdcan.c
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@@ -28,6 +28,11 @@
#define GPIO_Rx GPIO('A', 25)
#define GPIO_Tx GPIO('A', 24)
#define CANx_GCLK_ID CAN0_GCLK_ID
#elif CONFIG_ATSAMD_CANBUS_PB11_PB10
DECL_CONSTANT_STR("RESERVE_PINS_CAN", "PB11,PB10");
#define GPIO_Rx GPIO('B', 11)
#define GPIO_Tx GPIO('B', 10)
#define CANx_GCLK_ID CAN1_GCLK_ID
#elif CONFIG_ATSAMD_CANBUS_PB13_PB12
DECL_CONSTANT_STR("RESERVE_PINS_CAN", "PB13,PB12");
#define GPIO_Rx GPIO('B', 13)
@@ -40,7 +45,17 @@
#define CANx_GCLK_ID CAN1_GCLK_ID
#endif
#if CANx_GCLK_ID == CAN0_GCLK_ID
#if CANx_GCLK_ID == CAN0_GCLK_ID && CONFIG_MACH_SAMC21
#define CAN_FUNCTION 'G'
#define CANx CAN0
#define CANx_IRQn CAN0_IRQn
#define MCLK_AHBMASK_CANx MCLK_AHBMASK_CAN0
#elif CANx_GCLK_ID == CAN1_GCLK_ID && CONFIG_MACH_SAMC21
#define CAN_FUNCTION 'G'
#define CANx CAN1
#define CANx_IRQn CAN1_IRQn
#define MCLK_AHBMASK_CANx MCLK_AHBMASK_CAN1
#elif CANx_GCLK_ID == CAN0_GCLK_ID
#define CAN_FUNCTION 'I'
#define CANx CAN0
#define CANx_IRQn CAN0_IRQn
@@ -234,13 +249,18 @@ compute_btr(uint32_t pclock, uint32_t bitrate)
void
can_init(void)
{
#if CONFIG_HAVE_SAMD_USB
if (!CONFIG_USB) {
// The FDCAN peripheral only seems to run if at least one
// other peripheral is also enabled.
enable_pclock(USB_GCLK_ID, ID_USB);
USB->DEVICE.CTRLA.reg = USB_CTRLA_ENABLE;
}
#endif
#if CONFIG_MACH_SAMC21
MCLK->AHBMASK.reg |= MCLK_AHBMASK_CANx;
#endif
enable_pclock(CANx_GCLK_ID, -1);
gpio_peripheral(GPIO_Rx, CAN_FUNCTION, 1);