Duncan Laurie | 3c9f174 | 2013-11-01 13:34:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright 2013 Google Inc. |
| 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 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <arch/acpi.h> |
| 21 | #include <console/console.h> |
| 22 | #include <device/device.h> |
| 23 | #include <device/pci.h> |
| 24 | #include <device/pci_ids.h> |
| 25 | #include <stdint.h> |
| 26 | #include <reg_script.h> |
| 27 | |
| 28 | #include <baytrail/iomap.h> |
| 29 | #include <baytrail/iosf.h> |
| 30 | #include <baytrail/pci_devs.h> |
| 31 | #include <baytrail/pmc.h> |
| 32 | #include <baytrail/ramstage.h> |
| 33 | #include <baytrail/ehci.h> |
| 34 | |
| 35 | #include "chip.h" |
| 36 | |
| 37 | const struct reg_script ehci_init_script[] = { |
| 38 | /* Enable S0 PLL shutdown |
| 39 | * D29:F0:7A[12,10,7,6,4,3,2,1]=11111111b */ |
| 40 | REG_PCI_OR16(0x7a, 0x14de), |
| 41 | /* Enable SB local clock gating |
| 42 | * D29:F0:7C[14,3,2]=111b (14 set in clock gating step) */ |
| 43 | REG_PCI_OR32(0x7c, 0x0000000c), |
| 44 | REG_PCI_OR32(0x8c, 0x00000001), |
| 45 | /* Enable dynamic clock gating 0x4001=0xCE */ |
| 46 | REG_IOSF_RMW(IOSF_PORT_USBPHY, 0x4001, 0xFFFFFF00, 0xCE), |
| 47 | /* Magic RCBA register set sequence */ |
| 48 | /* RCBA + 0x200=0x1 */ |
| 49 | REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x200, 0x00000001), |
| 50 | /* RCBA + 0x204=0x2 */ |
| 51 | REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x204, 0x00000002), |
| 52 | /* RCBA + 0x208=0x0 */ |
| 53 | REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x208, 0x00000000), |
| 54 | /* RCBA + 0x240[4,3,2,1,0]=00000b */ |
| 55 | REG_MMIO_RMW32(RCBA_BASE_ADDRESS + 0x240, ~0x0000001f, 0), |
| 56 | /* RCBA + 0x318[9,8,6,5,4,3,2,1,0]=000000111b */ |
| 57 | REG_MMIO_RMW32(RCBA_BASE_ADDRESS + 0x318, ~0x00000378, 0x00000007), |
| 58 | /* RCBA + 0x31c[3,2,1,0]=0011b */ |
| 59 | REG_MMIO_RMW32(RCBA_BASE_ADDRESS + 0x31c, ~0x0000000c, 0x00000003), |
| 60 | REG_SCRIPT_END |
| 61 | }; |
| 62 | |
| 63 | const struct reg_script ehci_clock_gating_script[] = { |
| 64 | /* Enable SB local clock gating */ |
| 65 | REG_PCI_OR32(0x7c, 0x00004000), |
| 66 | /* RCBA + 0x284=0xbe (step B0+) */ |
| 67 | REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x284, 0x000000be), |
| 68 | REG_SCRIPT_END |
| 69 | }; |
| 70 | |
| 71 | const struct reg_script ehci_disable_script[] = { |
| 72 | /* Clear Run/Stop Bit */ |
| 73 | REG_RES_RMW32(PCI_BASE_ADDRESS_0, USB2CMD, ~USB2CMD_RS, 0), |
| 74 | /* Wait for HC Halted */ |
| 75 | REG_RES_POLL32(PCI_BASE_ADDRESS_0, USB2STS, |
| 76 | USB2STS_HCHALT, USB2STS_HCHALT, 10000), |
| 77 | /* Disable Interrupts */ |
| 78 | REG_PCI_OR32(EHCI_CMD_STS, INTRDIS), |
| 79 | /* Disable Asynchronous and Periodic Scheduler */ |
| 80 | REG_RES_RMW32(PCI_BASE_ADDRESS_0, USB2CMD, |
| 81 | ~(USB2CMD_ASE | USB2CMD_PSE), 0), |
| 82 | /* Disable port wake */ |
| 83 | REG_PCI_RMW32(EHCI_SBRN_FLA_PWC, ~(PORTWKIMP | PORTWKCAPMASK), 0), |
| 84 | /* Set Function Disable bit in RCBA */ |
| 85 | REG_MMIO_OR32(RCBA_BASE_ADDRESS + RCBA_FUNC_DIS, RCBA_EHCI_DIS), |
| 86 | REG_SCRIPT_END |
| 87 | }; |
| 88 | |
| 89 | static void usb2_phy_init(device_t dev) |
| 90 | { |
| 91 | struct soc_intel_baytrail_config *config = dev->chip_info; |
| 92 | struct reg_script usb2_phy_script[] = { |
| 93 | /* USB3PHYInit() */ |
| 94 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_COMPBG, 0x4700), |
| 95 | /* Per port phy settings, set in devicetree.cb */ |
| 96 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE0, |
| 97 | config->usb2_per_port_lane0), |
| 98 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, |
| 99 | USBPHY_PER_PORT_RCOMP_HS_PULLUP0, |
| 100 | config->usb2_per_port_rcomp_hs_pullup0), |
| 101 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE1, |
| 102 | config->usb2_per_port_lane1), |
| 103 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, |
| 104 | USBPHY_PER_PORT_RCOMP_HS_PULLUP1, |
| 105 | config->usb2_per_port_rcomp_hs_pullup1), |
| 106 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE2, |
| 107 | config->usb2_per_port_lane2), |
| 108 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, |
| 109 | USBPHY_PER_PORT_RCOMP_HS_PULLUP2, |
| 110 | config->usb2_per_port_rcomp_hs_pullup2), |
| 111 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, USBPHY_PER_PORT_LANE3, |
| 112 | config->usb2_per_port_lane3), |
| 113 | REG_IOSF_WRITE(IOSF_PORT_USBPHY, |
| 114 | USBPHY_PER_PORT_RCOMP_HS_PULLUP3, |
| 115 | config->usb2_per_port_rcomp_hs_pullup3), |
| 116 | REG_SCRIPT_END |
| 117 | }; |
| 118 | reg_script_run(usb2_phy_script); |
| 119 | } |
| 120 | |
| 121 | static void ehci_init(device_t dev) |
| 122 | { |
| 123 | struct soc_intel_baytrail_config *config = dev->chip_info; |
| 124 | struct reg_script ehci_hc_reset[] = { |
| 125 | REG_SCRIPT_SET_DEV(dev), |
| 126 | REG_RES_OR16(PCI_BASE_ADDRESS_0, USB2CMD, USB2CMD_HCRESET), |
| 127 | REG_SCRIPT_END |
| 128 | }; |
| 129 | struct reg_script ehci_hc_disable[] = { |
| 130 | REG_SCRIPT_SET_DEV(dev), |
| 131 | REG_SCRIPT_NEXT(ehci_disable_script), |
| 132 | REG_SCRIPT_END |
| 133 | }; |
| 134 | struct reg_script ehci_hc_init[] = { |
| 135 | REG_SCRIPT_SET_DEV(dev), |
| 136 | /* Controller init */ |
| 137 | REG_SCRIPT_NEXT(ehci_init_script), |
| 138 | /* Enable clock gating */ |
| 139 | REG_SCRIPT_NEXT(ehci_clock_gating_script), |
| 140 | /* |
| 141 | * Disable ports if requested |
| 142 | */ |
| 143 | /* Open per-port disable control override */ |
| 144 | REG_IO_RMW16(ACPI_BASE_ADDRESS + UPRWC, ~0, UPRWC_WR_EN), |
| 145 | REG_PCI_WRITE8(EHCI_USB2PDO, config->usb2_port_disable_mask), |
| 146 | /* Close per-port disable control override */ |
| 147 | REG_IO_RMW16(ACPI_BASE_ADDRESS + UPRWC, ~UPRWC_WR_EN, 0), |
| 148 | REG_SCRIPT_END |
| 149 | }; |
| 150 | |
| 151 | /* Don't reset controller in S3 resume path */ |
| 152 | if (acpi_slp_type != 3) |
| 153 | reg_script_run(ehci_hc_reset); |
| 154 | |
| 155 | /* Disable controller if ports are routed to XHCI */ |
| 156 | if (config->usb_route_to_xhci) { |
| 157 | /* Disable controller */ |
| 158 | reg_script_run(ehci_hc_disable); |
| 159 | |
| 160 | /* Hide device with southcluster function */ |
| 161 | dev->enabled = 0; |
| 162 | southcluster_enable_dev(dev); |
| 163 | } else { |
| 164 | /* Initialize EHCI controller */ |
| 165 | reg_script_run(ehci_hc_init); |
| 166 | } |
| 167 | |
| 168 | /* Setup USB2 PHY based on board config */ |
| 169 | usb2_phy_init(dev); |
| 170 | } |
| 171 | |
| 172 | static struct device_operations ehci_device_ops = { |
| 173 | .read_resources = pci_dev_read_resources, |
| 174 | .set_resources = pci_dev_set_resources, |
| 175 | .enable_resources = pci_dev_enable_resources, |
| 176 | .init = ehci_init, |
| 177 | .ops_pci = &soc_pci_ops, |
| 178 | }; |
| 179 | |
| 180 | static const struct pci_driver baytrail_ehci __pci_driver = { |
| 181 | .ops = &ehci_device_ops, |
| 182 | .vendor = PCI_VENDOR_ID_INTEL, |
| 183 | .device = EHCI_DEVID |
| 184 | }; |