Lee Leahy | 4dd34ee | 2016-05-02 14:31:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2016 Intel Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <console/console.h> |
| 17 | #include <device/pci_ids.h> |
| 18 | #include <soc/pci_devs.h> |
| 19 | #include <soc/reg_access.h> |
| 20 | |
| 21 | /* USB Phy Registers */ |
| 22 | #define USB2_GLOBAL_PORT 0x4001 |
| 23 | #define USB2_PLL1 0x7F02 |
| 24 | #define USB2_PLL2 0x7F03 |
| 25 | #define USB2_COMPBG 0x7F04 |
| 26 | |
Lee Leahy | f884112 | 2016-05-22 09:23:49 -0700 | [diff] [blame] | 27 | /* EHCI Packet Buffer OUT/IN Thresholds, values in number of DWORDs */ |
| 28 | #define EHCI_OUT_THRESHOLD_VALUE 0x7f |
| 29 | #define EHCI_IN_THRESHOLD_VALUE 0x7f |
| 30 | |
Lee Leahy | fd45658 | 2016-05-22 09:55:22 -0700 | [diff] [blame^] | 31 | /* Platform init USB device interrupt masks */ |
| 32 | #define V_IOH_USBDEVICE_D_INTR_MSK_UDC_REG (0x0000007f) |
| 33 | #define V_IOH_USBDEVICE_EP_INTR_MSK_UDC_REG \ |
| 34 | (B_IOH_USBDEVICE_EP_INTR_MSK_UDC_REG_OUT_EP_MASK \ |
| 35 | | B_IOH_USBDEVICE_EP_INTR_MSK_UDC_REG_IN_EP_MASK) |
| 36 | |
Lee Leahy | 4dd34ee | 2016-05-02 14:31:02 -0700 | [diff] [blame] | 37 | /* In order to configure the USB PHY to use clk120 (ickusbcoreclk) as PLL |
| 38 | * reference clock and Port2 as a USB device port, the following sequence must |
| 39 | * be followed |
| 40 | */ |
Lee Leahy | fd45658 | 2016-05-22 09:55:22 -0700 | [diff] [blame^] | 41 | static const struct reg_script ehci_init_script[] = { |
Lee Leahy | 4dd34ee | 2016-05-02 14:31:02 -0700 | [diff] [blame] | 42 | |
Lee Leahy | f884112 | 2016-05-22 09:23:49 -0700 | [diff] [blame] | 43 | /* Set packet buffer OUT/IN thresholds */ |
| 44 | REG_MMIO_RMW32(R_IOH_EHCI_INSNREG01, |
| 45 | ~(B_IOH_EHCI_INSNREG01_OUT_THRESHOLD_MASK |
| 46 | | B_IOH_EHCI_INSNREG01_IN_THRESHOLD_MASK), |
| 47 | (EHCI_OUT_THRESHOLD_VALUE |
| 48 | << B_IOH_EHCI_INSNREG01_OUT_THRESHOLD_BP) |
| 49 | | (EHCI_IN_THRESHOLD_VALUE |
| 50 | << B_IOH_EHCI_INSNREG01_IN_THRESHOLD_BP)), |
| 51 | |
Lee Leahy | 4dd34ee | 2016-05-02 14:31:02 -0700 | [diff] [blame] | 52 | /* Sighting #4930631 PDNRESCFG [8:7] of USB2_GLOBAL_PORT = 11b. |
| 53 | * For port 0 & 1 as host and port 2 as device. |
| 54 | */ |
| 55 | REG_USB_RXW(USB2_GLOBAL_PORT, ~(BIT8 | BIT7 | BIT1), (BIT8 | BIT7)), |
| 56 | |
| 57 | /* |
| 58 | * Sighting #4930653 Required BIOS change on Disconnect vref to change |
| 59 | * to 600mV. |
| 60 | */ |
| 61 | REG_USB_RXW(USB2_COMPBG, ~(BIT10 | BIT9 | BIT8 | BIT7), |
| 62 | (BIT10 | BIT7)), |
| 63 | |
| 64 | /* Sideband register write to USB AFE (Phy) |
| 65 | * (pllbypass) to bypass/Disable PLL before switch |
| 66 | */ |
| 67 | REG_USB_OR(USB2_PLL2, BIT29), |
| 68 | |
| 69 | /* Sideband register write to USB AFE (Phy) |
| 70 | * (coreclksel) to select 120MHz (ickusbcoreclk) clk source. |
| 71 | * (Default 0 to select 96MHz (ickusbclk96_npad/ppad)) |
| 72 | */ |
| 73 | REG_USB_OR(USB2_PLL1, BIT1), |
| 74 | |
| 75 | /* Sideband register write to USB AFE (Phy) |
| 76 | * (divide by 8) to achieve internal 480MHz clock |
| 77 | * for 120MHz input refclk. (Default: 4'b1000 (divide by 10) for 96MHz) |
| 78 | */ |
| 79 | REG_USB_RXW(USB2_PLL1, ~(BIT6 | BIT5 | BIT4 | BIT3), BIT6), |
| 80 | |
| 81 | /* Sideband register write to USB AFE (Phy) |
| 82 | * Clear (pllbypass) |
| 83 | */ |
| 84 | REG_USB_AND(USB2_PLL2, ~BIT29), |
| 85 | |
| 86 | /* Sideband register write to USB AFE (Phy) |
| 87 | * Set (startlock) to force the PLL FSM to restart the lock |
| 88 | * sequence due to input clock/freq switch. |
| 89 | */ |
| 90 | REG_USB_OR(USB2_PLL2, BIT24), |
| 91 | REG_SCRIPT_END |
| 92 | }; |
| 93 | |
Lee Leahy | fd45658 | 2016-05-22 09:55:22 -0700 | [diff] [blame^] | 94 | static const struct reg_script usb_device_port_init_script[] = { |
| 95 | |
| 96 | /* Mask and clear controller interrupts */ |
| 97 | REG_MMIO_WRITE32(R_IOH_USBDEVICE_D_INTR_MSK_UDC_REG, |
| 98 | V_IOH_USBDEVICE_D_INTR_MSK_UDC_REG), |
| 99 | REG_MMIO_WRITE32(R_IOH_USBDEVICE_D_INTR_UDC_REG, |
| 100 | V_IOH_USBDEVICE_D_INTR_MSK_UDC_REG), |
| 101 | |
| 102 | /* Mask and clear end point interrupts */ |
| 103 | REG_MMIO_WRITE32(R_IOH_USBDEVICE_EP_INTR_MSK_UDC_REG, |
| 104 | V_IOH_USBDEVICE_EP_INTR_MSK_UDC_REG), |
| 105 | REG_MMIO_WRITE32(R_IOH_USBDEVICE_EP_INTR_UDC_REG, |
| 106 | V_IOH_USBDEVICE_EP_INTR_MSK_UDC_REG), |
| 107 | REG_SCRIPT_END |
| 108 | }; |
| 109 | |
Lee Leahy | 4dd34ee | 2016-05-02 14:31:02 -0700 | [diff] [blame] | 110 | static void init(device_t dev) |
| 111 | { |
Lee Leahy | fd45658 | 2016-05-22 09:55:22 -0700 | [diff] [blame^] | 112 | if ((dev->path.pci.devfn & 7) == EHCI_FUNC) { |
| 113 | printk(BIOS_INFO, "Initializing USB PLLs\n"); |
| 114 | reg_script_run_on_dev(dev, ehci_init_script); |
| 115 | } else { |
| 116 | printk(BIOS_INFO, "Initializing USB device port\n"); |
| 117 | reg_script_run_on_dev(dev, usb_device_port_init_script); |
| 118 | } |
Lee Leahy | 4dd34ee | 2016-05-02 14:31:02 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | static struct device_operations device_ops = { |
| 122 | .read_resources = pci_dev_read_resources, |
| 123 | .set_resources = pci_dev_set_resources, |
| 124 | .enable_resources = pci_dev_enable_resources, |
| 125 | .init = init, |
| 126 | }; |
| 127 | |
| 128 | static const struct pci_driver driver __pci_driver = { |
| 129 | .ops = &device_ops, |
| 130 | .vendor = PCI_VENDOR_ID_INTEL, |
| 131 | .device = EHCI_DEVID, |
| 132 | }; |