| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2018 MediaTek Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <device/mmio.h> |
| #include <console/console.h> |
| #include <soc/addressmap.h> |
| #include <soc/usb.h> |
| #include <timer.h> |
| |
| #define USBTAG "[SSUSB] " |
| #define u3p_msg(fmt, arg...) printk(BIOS_INFO, USBTAG fmt, ##arg) |
| #define u3p_err(fmt, arg...) printk(BIOS_ERR, USBTAG fmt, ##arg) |
| |
| static struct ssusb_ippc_regs *ippc_regs = (void *)(SSUSB_IPPC_BASE); |
| static struct ssusb_sif_port *phy_ports = (void *)(SSUSB_SIF_BASE); |
| |
| static void phy_index_power_on(int index) |
| { |
| struct ssusb_sif_port *phy = phy_ports + index; |
| |
| if (!index) { |
| /* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */ |
| setbits_le32(&phy->u3phya.phya_reg0, P3A_RG_U3_VUSB10_ON); |
| /* Disable power domain ISO */ |
| clrbits_le32(&phy->u2phy.usbphyacr6, PA6_RG_U2_ISO_EN); |
| } |
| /* Switch system IP to USB mode */ |
| clrbits_le32(&phy->u2phy.u2phydtm0, P2C_FORCE_UART_EN); |
| clrbits_le32(&phy->u2phy.u2phydtm1, P2C_RG_UART_EN); |
| if (!index) |
| clrbits_le32(&phy->u2phy.u2phyacr4, P2C_U2_GPIO_CTR_MSK); |
| |
| /* Disable force settings */ |
| clrbits_le32(&phy->u2phy.u2phydtm0, P2C_FORCE_SUSPENDM | |
| P2C_RG_XCVRSEL | P2C_RG_DATAIN | P2C_DTM0_PART_MASK); |
| |
| clrbits_le32(&phy->u2phy.usbphyacr6, PA6_RG_U2_BC11_SW_EN); |
| /* Improve Rx sensitivity */ |
| clrsetbits_le32(&phy->u2phy.usbphyacr6, |
| PA6_RG_U2_SQTH, PA6_RG_U2_SQTH_VAL(2)); |
| |
| setbits_le32(&phy->u2phy.usbphyacr6, PA6_RG_U2_OTG_VBUSCMP_EN); |
| |
| clrsetbits_le32(&phy->u3phya_da.reg0, |
| P3A_RG_XTAL_EXT_EN_U3, P3A_RG_XTAL_EXT_EN_U3_VAL(2)); |
| |
| clrsetbits_le32(&phy->u3phya.phya_reg9, |
| P3A_RG_RX_DAC_MUX, P3A_RG_RX_DAC_MUX_VAL(4)); |
| |
| if (!index) |
| clrbits_le32(&phy->u2phy.usbphyacr5, PA5_RG_U2_HS_100U_U3_EN); |
| |
| clrsetbits_le32(&phy->u3phya.phya_reg6, |
| P3A_RG_TX_EIDLE_CM, P3A_RG_TX_EIDLE_CM_VAL(0xe)); |
| |
| clrsetbits_le32(&phy->u3phyd.phyd_cdr1, |
| P3D_RG_CDR_BIR_LTD0, P3D_RG_CDR_BIR_LTD0_VAL(0xc)); |
| clrsetbits_le32(&phy->u3phyd.phyd_cdr1, |
| P3D_RG_CDR_BIR_LTD1, P3D_RG_CDR_BIR_LTD1_VAL(0x3)); |
| |
| clrsetbits_le32(&phy->u2phy.u2phydtm1, |
| P2C_RG_SESSEND, P2C_RG_VBUSVALID | P2C_RG_AVALID); |
| |
| /* Set USB 2.0 slew rate value */ |
| clrsetbits_le32(&phy->u2phy.usbphyacr5, |
| PA5_RG_U2_HSTX_SRCTRL, PA5_RG_U2_HSTX_SRCTRL_VAL(4)); |
| } |
| |
| static void u3phy_power_on(void) |
| { |
| for (int i = 0; i < USB_PORT_NUMBER; i++) |
| phy_index_power_on(i); |
| } |
| |
| static int check_ip_clk_status(void) |
| { |
| int u3_port_num; |
| u32 check_bits; |
| u32 sts1, sts2; |
| struct stopwatch sw; |
| |
| u3_port_num = CAP_U3_PORT_NUM(read32(&ippc_regs->ip_xhci_cap)); |
| |
| check_bits = STS1_SYSPLL_STABLE | STS1_REF_RST | STS1_SYS125_RST; |
| check_bits |= (u3_port_num ? STS1_U3_MAC_RST : 0); |
| |
| stopwatch_init_usecs_expire(&sw, 50000); |
| |
| do { |
| if (stopwatch_expired(&sw)) { |
| u3p_err("usb clocks are not stable!!!\n"); |
| return -1; |
| } |
| |
| sts1 = read32(&ippc_regs->ip_pw_sts1) & check_bits; |
| sts2 = read32(&ippc_regs->ip_pw_sts2) & STS2_U2_MAC_RST; |
| } while ((sts1 != check_bits) || !sts2); |
| |
| return 0; |
| } |
| |
| static int u3phy_ports_enable(void) |
| { |
| int i; |
| u32 value; |
| int u3_port_num; |
| int u2_port_num; |
| |
| value = read32(&ippc_regs->ip_xhci_cap); |
| u3_port_num = CAP_U3_PORT_NUM(value); |
| u2_port_num = CAP_U2_PORT_NUM(value); |
| u3p_msg("%s u2p:%d, u3p:%d\n", __func__, u2_port_num, u3_port_num); |
| |
| /* Power on host ip */ |
| clrbits_le32(&ippc_regs->ip_pw_ctr1, CTRL1_IP_HOST_PDN); |
| |
| /* Power on and enable all u3 ports */ |
| for (i = 0; i < u3_port_num; i++) { |
| clrsetbits_le32(&ippc_regs->u3_ctrl_p[i], |
| CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS, |
| CTRL_U3_PORT_HOST_SEL); |
| } |
| |
| /* Power on and enable all u2 ports */ |
| for (i = 0; i < u2_port_num; i++) { |
| clrsetbits_le32(&ippc_regs->u2_ctrl_p[i], |
| CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS, |
| CTRL_U2_PORT_HOST_SEL); |
| } |
| return check_ip_clk_status(); |
| } |
| |
| static inline void ssusb_soft_reset(void) |
| { |
| /* Reset whole ip */ |
| setbits_le32(&ippc_regs->ip_pw_ctr0, CTRL0_IP_SW_RST); |
| clrbits_le32(&ippc_regs->ip_pw_ctr0, CTRL0_IP_SW_RST); |
| } |
| |
| __weak void mtk_usb_prepare(void) { /* do nothing */ } |
| |
| void setup_usb_host(void) |
| { |
| u3p_msg("Setting up USB HOST controller...\n"); |
| |
| mtk_usb_prepare(); |
| ssusb_soft_reset(); |
| if (u3phy_ports_enable()) { |
| u3p_err("%s fail to enable ports\n", __func__); |
| return; |
| } |
| u3phy_power_on(); |
| u3p_msg("phy power-on done.\n"); |
| } |