1 /* 2 * Copyright (c) 2009-2012 NVIDIA Corporation 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 #include <common.h> 24 #include <usb.h> 25 26 #include "ehci.h" 27 28 #include <asm/errno.h> 29 #include <asm/arch/usb.h> 30 31 /* 32 * A known hardware issue where Connect Status Change bit of PORTSC register 33 * of USB1 controller will be set after Port Reset. 34 * We have to clear it in order for later device enumeration to proceed. 35 * This ehci_powerup_fixup overrides the weak function ehci_powerup_fixup 36 * in "ehci-hcd.c". 37 */ 38 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) 39 { 40 mdelay(50); 41 if (((u32) status_reg & TEGRA_USB_ADDR_MASK) != TEGRA_USB1_BASE) 42 return; 43 /* For EHCI_PS_CSC to be cleared in ehci_hcd.c */ 44 if (ehci_readl(status_reg) & EHCI_PS_CSC) 45 *reg |= EHCI_PS_CSC; 46 } 47 48 /* 49 * Create the appropriate control structures to manage 50 * a new EHCI host controller. 51 */ 52 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor) 53 { 54 u32 our_hccr, our_hcor; 55 56 /* 57 * Select the first port, as we don't have a way of selecting others 58 * yet 59 */ 60 if (tegrausb_start_port(index, &our_hccr, &our_hcor)) 61 return -1; 62 63 *hccr = (struct ehci_hccr *)our_hccr; 64 *hcor = (struct ehci_hcor *)our_hcor; 65 66 return 0; 67 } 68 69 /* 70 * Destroy the appropriate control structures corresponding 71 * the the EHCI host controller. 72 */ 73 int ehci_hcd_stop(int index) 74 { 75 return tegrausb_stop_port(index); 76 } 77