1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) Tehuti Networks Ltd.
3 // Copyright (C) 2024 FUJITA Tomonori <fujita.tomonori@gmail.com>
5 //! Applied Micro Circuits Corporation QT2025 PHY driver
7 //! This driver is based on the vendor driver `QT2025_phy.c`. This source
8 //! and firmware can be downloaded on the EN-9320SFP+ support site.
10 //! The QT2025 PHY integrates an Intel 8051 micro-controller.
13 use kernel::error::code;
14 use kernel::firmware::Firmware;
15 use kernel::net::phy::{
20 use kernel::prelude::*;
21 use kernel::sizes::{SZ_16K, SZ_8K};
23 kernel::module_phy_driver! {
26 phy::DeviceId::new_with_driver::<PhyQT2025>(),
29 author: "FUJITA Tomonori <fujita.tomonori@gmail.com>",
30 description: "AMCC QT2025 PHY driver",
32 firmware: ["qt2025-2.0.3.3.fw"],
38 impl Driver for PhyQT2025 {
39 const NAME: &'static CStr = c_str!("QT2025 10Gpbs SFP+");
40 const PHY_DEVICE_ID: phy::DeviceId = phy::DeviceId::new_with_exact_mask(0x0043a400);
42 fn probe(dev: &mut phy::Device) -> Result<()> {
43 // Check the hardware revision code.
44 // Only 0x3b works with this driver and firmware.
45 let hw_rev = dev.read(C45::new(Mmd::PMAPMD, 0xd001))?;
46 if (hw_rev >> 8) != 0xb3 {
47 return Err(code::ENODEV);
50 // `MICRO_RESETN`: hold the micro-controller in reset while configuring.
51 dev.write(C45::new(Mmd::PMAPMD, 0xc300), 0x0000)?;
52 // `SREFCLK_FREQ`: configure clock frequency of the micro-controller.
53 dev.write(C45::new(Mmd::PMAPMD, 0xc302), 0x0004)?;
55 dev.write(C45::new(Mmd::PMAPMD, 0xc319), 0x0038)?;
56 // `CUS_LAN_WAN_CONFIG`: select between LAN and WAN (WIS) mode.
57 dev.write(C45::new(Mmd::PMAPMD, 0xc31a), 0x0098)?;
58 // The following writes use standardized registers (3.38 through
59 // 3.41 5/10/25GBASE-R PCS test pattern seed B) for something else.
60 // We don't know what.
61 dev.write(C45::new(Mmd::PCS, 0x0026), 0x0e00)?;
62 dev.write(C45::new(Mmd::PCS, 0x0027), 0x0893)?;
63 dev.write(C45::new(Mmd::PCS, 0x0028), 0xa528)?;
64 dev.write(C45::new(Mmd::PCS, 0x0029), 0x0003)?;
65 // Configure transmit and recovered clock.
66 dev.write(C45::new(Mmd::PMAPMD, 0xa30a), 0x06e1)?;
67 // `MICRO_RESETN`: release the micro-controller from the reset state.
68 dev.write(C45::new(Mmd::PMAPMD, 0xc300), 0x0002)?;
69 // The micro-controller will start running from the boot ROM.
70 dev.write(C45::new(Mmd::PCS, 0xe854), 0x00c0)?;
72 let fw = Firmware::request(c_str!("qt2025-2.0.3.3.fw"), dev.as_ref())?;
73 if fw.data().len() > SZ_16K + SZ_8K {
74 return Err(code::EFBIG);
77 // The 24kB of program memory space is accessible by MDIO.
78 // The first 16kB of memory is located in the address range 3.8000h - 3.BFFFh.
79 // The next 8kB of memory is located at 4.8000h - 4.9FFFh.
80 let mut dst_offset = 0;
81 let mut dst_mmd = Mmd::PCS;
82 for (src_idx, val) in fw.data().iter().enumerate() {
83 if src_idx == SZ_16K {
84 // Start writing to the next register with no offset
89 dev.write(C45::new(dst_mmd, 0x8000 + dst_offset), (*val).into())?;
93 // The micro-controller will start running from SRAM.
94 dev.write(C45::new(Mmd::PCS, 0xe854), 0x0040)?;
96 // TODO: sleep here until the hw becomes ready.
100 fn read_status(dev: &mut phy::Device) -> Result<u16> {
101 dev.genphy_read_status::<C45>()