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atsamd: Initial support for SAMD51

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2019-01-14 18:21:50 -05:00
parent f6ce875818
commit 8cd83b4c2d
17 changed files with 434 additions and 61 deletions
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43
src/atsamd/usbserial.c
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@@ -1,6 +1,6 @@
// Hardware interface to USB on samd21
// Hardware interface to USB on samd
//
// Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2018-2019 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
@@ -11,7 +11,6 @@
#include "board/usb_cdc.h" // usb_notify_ep0
#include "board/usb_cdc_ep.h" // USB_CDC_EP_BULK_IN
#include "internal.h" // enable_pclock
#include "samd21.h" // USB
#include "sched.h" // DECL_INIT
@@ -173,12 +172,16 @@ usb_set_configure(void)
void
usb_request_bootloader(void)
{
if (CONFIG_FLASH_START) {
// Arduino Zero bootloader hack
irq_disable();
writel((void*)0x20007FFC, 0x07738135);
NVIC_SystemReset();
}
if (!CONFIG_FLASH_START)
return;
// Bootloader hack
irq_disable();
#if CONFIG_MACH_SAMD21
writel((void*)0x20007FFC, 0x07738135);
#elif CONFIG_MACH_SAMD51
writel((void*)(HSRAM_ADDR + HSRAM_SIZE - 4), 0xf01669ef);
#endif
NVIC_SystemReset();
}
void
@@ -187,8 +190,9 @@ usbserial_init(void)
// configure usb clock
enable_pclock(USB_GCLK_ID, ID_USB);
// configure USBD+ and USBD- pins
gpio_peripheral(GPIO('A', 24), 'G', 0);
gpio_peripheral(GPIO('A', 25), 'G', 0);
uint32_t ptype = CONFIG_MACH_SAMD21 ? 'G' : 'H';
gpio_peripheral(GPIO('A', 24), ptype, 0);
gpio_peripheral(GPIO('A', 25), ptype, 0);
uint16_t trim = (readl((void*)USB_FUSES_TRIM_ADDR)
& USB_FUSES_TRIM_Msk) >> USB_FUSES_TRIM_Pos;
uint16_t transp = (readl((void*)USB_FUSES_TRANSP_ADDR)
@@ -205,8 +209,19 @@ usbserial_init(void)
USB->DEVICE.CTRLB.reg = 0;
// enable irqs
USB->DEVICE.INTENSET.reg = USB_DEVICE_INTENSET_EORST;
#if CONFIG_MACH_SAMD21
NVIC_SetPriority(USB_IRQn, 1);
NVIC_EnableIRQ(USB_IRQn);
#elif CONFIG_MACH_SAMD51
NVIC_SetPriority(USB_0_IRQn, 1);
NVIC_SetPriority(USB_1_IRQn, 1);
NVIC_SetPriority(USB_2_IRQn, 1);
NVIC_SetPriority(USB_3_IRQn, 1);
NVIC_EnableIRQ(USB_0_IRQn);
NVIC_EnableIRQ(USB_1_IRQn);
NVIC_EnableIRQ(USB_2_IRQn);
NVIC_EnableIRQ(USB_3_IRQn);
#endif
}
DECL_INIT(usbserial_init);
@@ -244,3 +259,9 @@ USB_Handler(void)
usb_notify_bulk_in();
}
}
// Aliases for irq handeler on SAMD51
void USB_0_Handler(void) __visible __attribute__((alias("USB_Handler")));
void USB_1_Handler(void) __visible __attribute__((alias("USB_Handler")));
void USB_2_Handler(void) __visible __attribute__((alias("USB_Handler")));
void USB_3_Handler(void) __visible __attribute__((alias("USB_Handler")));