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atsamd: Enable chipid as usb serial number

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2019-11-25 01:16:21 -05:00
parent 8f6efe5a7b
commit d7ec5505a6
4 changed files with 50 additions and 4 deletions
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45
src/atsamd/chipid.c Normal file
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// Support for extracting the hardware chip id on atsamd
//
// Copyright (C) 2019 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "autoconf.h" // CONFIG_USB_SERIAL_NUMBER_CHIPID
#include "generic/usb_cdc.h" // usb_fill_serial
#include "generic/usbstd.h" // usb_string_descriptor
#include "sched.h" // DECL_INIT
#define CHIP_UID_LEN 16
static struct {
struct usb_string_descriptor desc;
uint16_t data[CHIP_UID_LEN * 2];
} cdc_chipid;
struct usb_string_descriptor *
usbserial_get_serialid(void)
{
return &cdc_chipid.desc;
}
void
chipid_init(void)
{
if (!CONFIG_USB_SERIAL_NUMBER_CHIPID)
return;
uint32_t id[4];
if (CONFIG_MACH_SAMD21) {
id[0] = *(uint32_t*)0x0080A00C;
id[1] = *(uint32_t*)0x0080A040;
id[2] = *(uint32_t*)0x0080A044;
id[3] = *(uint32_t*)0x0080A048;
} else {
id[0] = *(uint32_t*)0x008061FC;
id[1] = *(uint32_t*)0x00806010;
id[2] = *(uint32_t*)0x00806014;
id[3] = *(uint32_t*)0x00806018;
}
usb_fill_serial(&cdc_chipid.desc, ARRAY_SIZE(cdc_chipid.data), id);
}
DECL_INIT(chipid_init);