1 /*
2  * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include "pico.h"
8 #include "hardware/address_mapped.h"
9 #include "hardware/regs/tbman.h"
10 #include "hardware/regs/sysinfo.h"
11 
12 // Note we leave the FPGA check in by default so that we can run bug repro
13 // binaries coming in from the wild on the FPGA platform. It takes up around
14 // 48 bytes if you include all the calls, so you can pass PICO_NO_FPGA_CHECK=1
15 // to remove it. The FPGA check is used to skip initialisation of hardware
16 // (mainly clock generators and oscillators) that aren't present on FPGA.
17 
18 #if !PICO_NO_FPGA_CHECK
19 // Inline stub provided in header if this code is unused (so folding can be
20 // done in each TU instead of relying on LTO)
running_on_fpga()21 bool running_on_fpga() {
22     return !!((*(io_ro_32 *)TBMAN_BASE) & TBMAN_PLATFORM_FPGA_BITS);
23 }
24 #endif
25 
26 #define MANUFACTURER_RPI 0x927
27 #define PART_RP2 0x2
28 
rp2040_chip_version()29 uint8_t rp2040_chip_version() {
30     // First register of sysinfo is chip id
31     uint32_t chip_id = *((io_ro_32*)(SYSINFO_BASE + SYSINFO_CHIP_ID_OFFSET));
32     uint32_t __unused manufacturer = chip_id & SYSINFO_CHIP_ID_MANUFACTURER_BITS;
33     uint32_t __unused part = (chip_id & SYSINFO_CHIP_ID_PART_BITS) >> SYSINFO_CHIP_ID_PART_LSB;
34     assert(manufacturer == MANUFACTURER_RPI);
35     assert(part == PART_RP2);
36     // Version 1 == B0/B1
37     uint version = (chip_id & SYSINFO_CHIP_ID_REVISION_BITS) >> SYSINFO_CHIP_ID_REVISION_LSB;
38     return (uint8_t)version;
39 }