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 #include "ehci-core.h" 28 29 #include <asm/errno.h> 30 #include <asm/arch/usb.h> 31 32 /* 33 * A known hardware issue where Connect Status Change bit of PORTSC register 34 * of USB1 controller will be set after Port Reset. 35 * We have to clear it in order for later device enumeration to proceed. 36 * This ehci_powerup_fixup overrides the weak function ehci_powerup_fixup 37 * in "ehci-hcd.c". 38 */ 39 void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg) 40 { 41 mdelay(50); 42 if (((u32) status_reg & TEGRA_USB_ADDR_MASK) != TEGRA_USB1_BASE) 43 return; 44 /* For EHCI_PS_CSC to be cleared in ehci_hcd.c */ 45 if (ehci_readl(status_reg) & EHCI_PS_CSC) 46 *reg |= EHCI_PS_CSC; 47 } 48 49 /* 50 * Create the appropriate control structures to manage 51 * a new EHCI host controller. 52 */ 53 int ehci_hcd_init(void) 54 { 55 u32 our_hccr, our_hcor; 56 57 /* 58 * Select the first port, as we don't have a way of selecting others 59 * yet 60 */ 61 if (tegrausb_start_port(0, &our_hccr, &our_hcor)) 62 return -1; 63 64 hccr = (struct ehci_hccr *)our_hccr; 65 hcor = (struct ehci_hcor *)our_hcor; 66 67 return 0; 68 } 69 70 /* 71 * Destroy the appropriate control structures corresponding 72 * the the EHCI host controller. 73 */ 74 int ehci_hcd_stop(void) 75 { 76 tegrausb_stop_port(); 77 return 0; 78 } 79