| Joonwoo Park | 8ef6919 | 2014-06-09 16:54:15 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2014, The Linux Foundation. All rights reserved. |
| 2 | |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions are |
| 5 | * met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer in the documentation and/or other materials provided |
| 11 | * with the distribution. |
| 12 | * * Neither the name of The Linux Foundation. nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <platform/iomap.h> |
| 30 | #include <reg.h> |
| 31 | #include <bits.h> |
| 32 | #include <debug.h> |
| 33 | |
| 34 | void qusb2_phy_reset(void) |
| 35 | { |
| 36 | uint32_t val; |
| 37 | |
| 38 | /* Block Reset */ |
| 39 | val = readl(GCC_QUSB2_PHY_BCR) | BIT(0); |
| 40 | writel(val, GCC_QUSB2_PHY_BCR); |
| 41 | udelay(10); |
| 42 | writel(val & ~BIT(0), GCC_QUSB2_PHY_BCR); |
| 43 | |
| 44 | /* Deassert POWERDOWN by clearing bit 0 to enable the PHY */ |
| 45 | val = readl(QUSB2PHY_PORT_POWERDOWN); |
| 46 | writel(val & ~BIT(0), QUSB2PHY_PORT_POWERDOWN); |
| 47 | udelay(10); |
| 48 | |
| 49 | /* set CLAMP_N_EN and FREEZIO_N */ |
| 50 | writel(0x22, QUSB2PHY_PORT_POWERDOWN); |
| 51 | } |