506 lines
11 KiB
C
506 lines
11 KiB
C
/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
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/*
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* drivers/usb/host/xhci-amlogic.c
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*
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* Copyright (C) 2020 Amlogic, Inc. All rights reserved.
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*
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*/
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/*
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* This file is a conglomeration for DWC3-init sequence and further
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* exynos5 specific PHY-init sequence.
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*/
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#include <common.h>
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//#include <fdtdec.h>
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#include <libfdt.h>
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#include <malloc.h>
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#include <usb.h>
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#include <watchdog.h>
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#include <asm/arch/cpu.h>
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//#include <asm/arch/power.h>
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//#include <asm/gpio.h>
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#include <asm-generic/errno.h>
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#include <linux/compat.h>
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#include <linux/usb/dwc3.h>
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#include <asm/arch/usb.h>
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#include "xhci.h"
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/* Declare global data pointer */
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* Contains pointers to register base addresses
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* for the usb controller.
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*/
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struct amlogic_xhci {
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struct amlogic_usb2_phy *usb2_phy;
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struct amlogic_usb3_phy *usb3_phy;
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struct xhci_hccr *hcd;
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struct dwc3 *dwc3_reg;
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};
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amlogic_usb3_phy *usb_aml_reg;
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static struct amlogic_xhci amlogic;
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static void amlogic_usb2_phy_init(struct amlogic_usb2_phy *phy)
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{
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int time_dly = 500;
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int i;
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amlogic_usb2_phy *u2p_aml_reg;
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u2p_r0_t reg0;
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for (i=0; i<4; i++)
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{
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u2p_aml_reg = (amlogic_usb2_phy *)((ulong)phy+i*PHY_REGISTER_SIZE);
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reg0.d32 = u2p_aml_reg->u2p_r0;
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reg0.b.por = 1;
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reg0.b.dmpulldown = 1;
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reg0.b.dppulldown = 1;
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u2p_aml_reg->u2p_r0 = reg0.d32;
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udelay(time_dly);
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reg0.d32 = u2p_aml_reg->u2p_r0;
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reg0.b.por = 0;
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u2p_aml_reg->u2p_r0 = reg0.d32;
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}
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return;
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}
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void cr_bus_addr (u32 addr)
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{
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usb_r2_t usb_r2 = {.d32 = 0};
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usb_r6_t usb_r6 = {.d32 = 0};
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// prepare addr
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usb_r2.b.p30_cr_data_in = addr;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// cap addr rising edge
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usb_r2.b.p30_cr_cap_addr = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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usb_r2.b.p30_cr_cap_addr = 1;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 1
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 0);
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// clear cap addr
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usb_r2.b.p30_cr_cap_addr = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 0
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 1);
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}
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int cr_bus_read (u32 addr)
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{
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int data;
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usb_r2_t usb_r2 = {.d32 = 0};
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usb_r6_t usb_r6 = {.d32 = 0};
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cr_bus_addr ( addr );
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// read rising edge
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usb_r2.b.p30_cr_read = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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usb_r2.b.p30_cr_read = 1;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 1
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 0);
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// save data
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data = usb_r6.b.p30_cr_data_out;
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// clear read
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usb_r2.b.p30_cr_read = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 0
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 1);
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return data;
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}
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void cr_bus_write (u32 addr, u32 data)
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{
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usb_r2_t usb_r2 = {.d32 = 0};
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usb_r6_t usb_r6 = {.d32 = 0};
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cr_bus_addr ( addr );
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// prepare data
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usb_r2.b.p30_cr_data_in = data;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// cap data rising edge
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usb_r2.b.p30_cr_cap_data = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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usb_r2.b.p30_cr_cap_data = 1;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 1
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 0);
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// clear cap data
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usb_r2.b.p30_cr_cap_data = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 0
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 1);
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// write rising edge
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usb_r2.b.p30_cr_write = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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usb_r2.b.p30_cr_write = 1;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 1
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 0);
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// clear write
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usb_r2.b.p30_cr_write = 0;
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usb_aml_reg->usb_r2 = usb_r2.d32;
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// wait ack 0
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do {
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usb_r6.d32 = usb_aml_reg->usb_r6;
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} while (usb_r6.b.p30_cr_ack == 1);
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}
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static void amlogic_usb3_phy_init(struct amlogic_usb3_phy *phy)
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{
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usb_r0_t r0 = {.d32 = 0};
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usb_r1_t r1 = {.d32 = 0};
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usb_r2_t r2 = {.d32 = 0};
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usb_r3_t r3 = {.d32 = 0};
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int i;
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u32 data = 0;
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for (i=0;i<1;i++)
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{
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usb_aml_reg = (amlogic_usb3_phy *)((ulong)phy+i*PHY_REGISTER_SIZE);
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usb_aml_reg->usb_r3 = (1<<13) | (0x68<<24);
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udelay(2);
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r0.d32 = usb_aml_reg->usb_r0;
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r0.b.p30_phy_reset = 1;
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usb_aml_reg->usb_r0 = r0.d32;
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udelay(2);
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r0.b.p30_phy_reset = 0;
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r0.b.p30_tx_vboost_lvl = 0x4;
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usb_aml_reg->usb_r0 = r0.d32;
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/*
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* WORKAROUND: There is SSPHY suspend bug due to which USB enumerates
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* in HS mode instead of SS mode. Workaround it by asserting
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* LANE0.TX_ALT_BLOCK.EN_ALT_BUS to enable TX to use alt bus mode
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*/
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data = cr_bus_read(0x102d);
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data |= (1 << 7);
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cr_bus_write(0x102D, data);
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data = cr_bus_read(0x1010);
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data &= ~0xff0;
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data |= 0x20;
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cr_bus_write(0x1010, data);
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/*
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* Fix RX Equalization setting as follows
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* LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
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* LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
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* LANE0.RX_OVRD_IN_HI.RX_EQ set to 3
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* LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
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*/
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data = cr_bus_read(0x1006);
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data &= ~(1 << 6);
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data |= (1 << 7);
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data &= ~(0x7 << 8);
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data |= (0x3 << 8);
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data |= (0x1 << 11);
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cr_bus_write(0x1006, data);
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/*
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* Set EQ and TX launch amplitudes as follows
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* LANE0.TX_OVRD_DRV_LO.PREEMPH set to 22
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* LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 127
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* LANE0.TX_OVRD_DRV_LO.EN set to 1.
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*/
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data = cr_bus_read(0x1002);
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data &= ~0x3f80;
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data |= (0x16 << 7);
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data &= ~0x7f;
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data |= (0x7f | (1 << 14));
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cr_bus_write(0x1002, data);
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/*
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* TX_FULL_SWING to 127
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*/
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data = cr_bus_read(0x30);
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data &= ~(0xf << 4);
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cr_bus_write(0x30, data);
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/*
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* TX_FULL_SWING to 127
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*/
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r1.d32 = usb_aml_reg->usb_r1;
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r1.b.p30_pcs_tx_swing_full = 127;
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r1.b.u3h_fladj_30mhz_reg = 0x20;
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usb_aml_reg->usb_r1 = r1.d32;
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udelay(2);
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/*
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* TX_DEEMPH_3_5DB to 22
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*/
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r2.d32 = usb_aml_reg->usb_r2;
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r2.b.p30_pcs_tx_deemph_3p5db = 22;
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usb_aml_reg->usb_r2 = r2.d32;
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udelay(2);
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/*
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* LOS_BIAS to 0x5
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* LOS_LEVEL to 0x9
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*/
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r3.d32 = usb_aml_reg->usb_r3;
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r3.b.p30_los_bias = 0x5;
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r3.b.p30_los_level = 0x9;
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r3.b.p30_ssc_en = 1;
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r3.b.p30_ssc_range = 2;
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usb_aml_reg->usb_r3 = r3.d32;
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}
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}
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static void amlogic_usb2_phy_exit(struct amlogic_usb2_phy *phy)
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{
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return;
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}
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static void amlogic_usb3_phy_exit(struct amlogic_usb3_phy *phy)
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{
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return;
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}
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void dwc3_set_mode(struct dwc3 *dwc3_reg, u32 mode)
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{
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u32 reg;
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reg = xhci_readl(&dwc3_reg->g_ctl);
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reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
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reg |= DWC3_GCTL_PRTCAPDIR(mode);
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xhci_writel(&dwc3_reg->g_ctl, reg);
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}
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static void dwc3_core_soft_reset(struct dwc3 *dwc3_reg)
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{
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u32 reg;
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/* Before Resetting PHY, put Core in Reset */
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reg = xhci_readl(&dwc3_reg->g_ctl);
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reg |= DWC3_GCTL_CORESOFTRESET;
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xhci_writel(&dwc3_reg->g_ctl, reg);
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/* Assert USB3 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb3pipectl[0]);
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reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb3pipectl[0], reg);
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/* Assert USB2 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[0]);
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reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[0], reg);
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[1]);
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reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[1], reg);
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[2]);
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reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[2], reg);
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[3]);
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reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[3], reg);
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amlogic_usb2_phy_init(amlogic.usb2_phy);
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amlogic_usb3_phy_init(amlogic.usb3_phy);
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mdelay(100);
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/* Clear USB3 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb3pipectl[0]);
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reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb3pipectl[0], reg);
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/* Clear USB2 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[0]);
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reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
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reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
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xhci_writel(&dwc3_reg->g_usb2phycfg[0], reg);
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/* Clear USB2 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[1]);
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reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[1], reg);
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/* Clear USB2 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[2]);
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reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[2], reg);
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/* Clear USB2 PHY reset */
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reg = xhci_readl(&dwc3_reg->g_usb2phycfg[3]);
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reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
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xhci_writel(&dwc3_reg->g_usb2phycfg[3], reg);
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mdelay(100);
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/* After PHYs are stable we can take Core out of reset state */
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reg = xhci_readl(&dwc3_reg->g_ctl);
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reg &= ~DWC3_GCTL_CORESOFTRESET;
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xhci_writel(&dwc3_reg->g_ctl, reg);
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}
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static int dwc3_core_init(struct dwc3 *dwc3_reg)
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{
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u32 reg;
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u32 revision;
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unsigned int dwc3_hwparams1;
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unsigned long timeout;
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revision = xhci_readl(&dwc3_reg->g_snpsid);
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/* This should read as U3 followed by revision number */
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if ((revision & DWC3_GSNPSID_MASK) != 0x55330000) {
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printf("this is not a DesignWare USB3 DRD Core\n");
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return -EINVAL;
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}
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/* issue device SoftReset too */
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timeout = 500;
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xhci_writel(&dwc3_reg->d_ctl, DWC3_DCTL_CSFTRST);
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do {
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reg = xhci_readl(&dwc3_reg->d_ctl);
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if (!(reg & DWC3_DCTL_CSFTRST))
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break;
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timeout--;
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mdelay(1);
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} while (timeout);
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if (!timeout) {
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printf("device SoftReset fail!\n");
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return -EINVAL;
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}
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dwc3_core_soft_reset(dwc3_reg);
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dwc3_hwparams1 = xhci_readl(&dwc3_reg->g_hwparams1);
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reg = xhci_readl(&dwc3_reg->g_ctl);
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reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
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reg |= DWC3_GCTL_DISSCRAMBLE;
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switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc3_hwparams1)) {
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case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
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reg &= ~DWC3_GCTL_DSBLCLKGTNG;
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break;
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default:
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debug("No power optimization available\n");
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}
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/*
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* WORKAROUND: DWC3 revisions <1.90a have a bug
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* where the device can fail to connect at SuperSpeed
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* and falls back to high-speed mode which causes
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* the device to enter a Connect/Disconnect loop
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*/
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if ((revision & DWC3_REVISION_MASK) < 0x190a)
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reg |= DWC3_GCTL_U2RSTECN;
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xhci_writel(&dwc3_reg->g_ctl, reg);
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return 0;
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}
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static int amlogic_xhci_core_init(struct amlogic_xhci *amlogic)
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{
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int ret;
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ret = dwc3_core_init(amlogic->dwc3_reg);
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if (ret) {
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debug("failed to initialize core\n");
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return -EINVAL;
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}
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/* We are hard-coding DWC3 core to Host Mode */
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dwc3_set_mode(amlogic->dwc3_reg, DWC3_GCTL_PRTCAP_HOST);
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return 0;
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}
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static void amlogic_xhci_core_exit(struct amlogic_xhci *amlogic)
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{
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amlogic_usb2_phy_exit(amlogic->usb2_phy);
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amlogic_usb3_phy_exit(amlogic->usb3_phy);
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}
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int xhci_hcd_init(int index, struct xhci_hccr **hccr, struct xhci_hcor **hcor)
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{
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struct amlogic_xhci *ctx = &amlogic;
|
|
amlogic_usb_config_t * usb_config;
|
|
int ret;
|
|
|
|
usb_config = board_usb_start(BOARD_USB_MODE_HOST,index);
|
|
|
|
ctx->hcd = (struct xhci_hccr *)(ulong)(usb_config->base_addr);
|
|
ctx->dwc3_reg = (struct dwc3 *)((char *)(ctx->hcd) + DWC3_REG_OFFSET);
|
|
ctx->usb3_phy = (struct amlogic_usb3_phy *)(ulong)(usb_config->usb_phy3_base_addr);
|
|
ctx->usb2_phy = (struct amlogic_usb2_phy *)(ulong)(usb_config->usb_phy2_base_addr);
|
|
|
|
ret = amlogic_xhci_core_init(ctx);
|
|
if (ret) {
|
|
puts("XHCI: failed to initialize controller\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
*hccr = (ctx->hcd);
|
|
*hcor = (struct xhci_hcor *)((ulong) *hccr
|
|
+ HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
|
|
|
|
debug("amlogic-xhci: init hccr %lx and hcor %lx hc_length %d\n",
|
|
(ulong)*hccr, (ulong)*hcor,
|
|
(uint32_t)HC_LENGTH(xhci_readl(&(*hccr)->cr_capbase)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
void xhci_hcd_stop(int index)
|
|
{
|
|
struct amlogic_xhci *ctx = &amlogic;
|
|
|
|
amlogic_xhci_core_exit(ctx);
|
|
}
|
|
|