From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/roms/u-boot/drivers/usb/ulpi/ulpi-viewport.c | 120 ++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 qemu/roms/u-boot/drivers/usb/ulpi/ulpi-viewport.c (limited to 'qemu/roms/u-boot/drivers/usb/ulpi/ulpi-viewport.c') diff --git a/qemu/roms/u-boot/drivers/usb/ulpi/ulpi-viewport.c b/qemu/roms/u-boot/drivers/usb/ulpi/ulpi-viewport.c new file mode 100644 index 000000000..b4974ed2a --- /dev/null +++ b/qemu/roms/u-boot/drivers/usb/ulpi/ulpi-viewport.c @@ -0,0 +1,120 @@ +/* + * Copyright (C) 2011 Jana Rapava + * Copyright (C) 2011 CompuLab, Ltd. + * + * Authors: Jana Rapava + * Igor Grinberg + * + * Based on: + * linux/drivers/usb/otg/ulpi_viewport.c + * + * Original Copyright follow: + * Copyright (C) 2011 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include +#include +#include + +/* ULPI viewport control bits */ +#define ULPI_SS (1 << 27) +#define ULPI_RWCTRL (1 << 29) +#define ULPI_RWRUN (1 << 30) +#define ULPI_WU (1 << 31) + +/* + * Wait for the ULPI request to complete + * + * @ulpi_viewport - the address of the viewport + * @mask - expected value to wait for + * + * returns 0 on mask match, ULPI_ERROR on time out. + */ +static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask) +{ + int timeout = CONFIG_USB_ULPI_TIMEOUT; + + /* Wait for the bits in mask to become zero. */ + while (--timeout) { + if ((readl(ulpi_vp->viewport_addr) & mask) == 0) + return 0; + + udelay(1); + } + + return ULPI_ERROR; +} + +/* + * Wake the ULPI PHY up for communication + * + * returns 0 on success. + */ +static int ulpi_wakeup(struct ulpi_viewport *ulpi_vp) +{ + int err; + + if (readl(ulpi_vp->viewport_addr) & ULPI_SS) + return 0; /* already awake */ + + writel(ULPI_WU, ulpi_vp->viewport_addr); + + err = ulpi_wait(ulpi_vp, ULPI_WU); + if (err) + printf("ULPI wakeup timed out\n"); + + return err; +} + +/* + * Issue a ULPI read/write request + * + * @value - the ULPI request + */ +static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value) +{ + int err; + + err = ulpi_wakeup(ulpi_vp); + if (err) + return err; + + writel(value, ulpi_vp->viewport_addr); + + err = ulpi_wait(ulpi_vp, ULPI_RWRUN); + if (err) + printf("ULPI request timed out\n"); + + return err; +} + +int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value) +{ + u32 val = ULPI_RWRUN | ULPI_RWCTRL | ((u32)reg << 16) | (value & 0xff); + + val |= (ulpi_vp->port_num & 0x7) << 24; + return ulpi_request(ulpi_vp, val); +} + +u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg) +{ + int err; + u32 val = ULPI_RWRUN | ((u32)reg << 16); + + val |= (ulpi_vp->port_num & 0x7) << 24; + err = ulpi_request(ulpi_vp, val); + if (err) + return err; + + return (readl(ulpi_vp->viewport_addr) >> 8) & 0xff; +} -- cgit 1.2.3-korg