2 * OMAP ulpi viewport support
3 * Based on drivers/usb/ulpi/ulpi-viewport.c
5 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
6 * Author: Govindraj R <govindraj.raja@ti.com>
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 of
10 * the License as published by the Free Software Foundation.
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.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #define OMAP_ULPI_WR_OPSEL (2 << 22)
26 #define OMAP_ULPI_RD_OPSEL (3 << 22)
27 #define OMAP_ULPI_START (1 << 31)
30 * Wait for having ulpi in done state
32 static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask)
34 int timeout = CONFIG_USB_ULPI_TIMEOUT;
37 if (!(readl(ulpi_vp->viewport_addr) & mask))
47 * Issue a ULPI read/write request
49 static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
53 writel(value, ulpi_vp->viewport_addr);
55 err = ulpi_wait(ulpi_vp, OMAP_ULPI_START);
57 debug("ULPI request timed out\n");
62 int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value)
64 u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
65 OMAP_ULPI_WR_OPSEL | ((u32)reg << 16) | (value & 0xff);
67 return ulpi_request(ulpi_vp, val);
70 u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg)
73 u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
74 OMAP_ULPI_RD_OPSEL | ((u32)reg << 16);
76 err = ulpi_request(ulpi_vp, val);
80 return readl(ulpi_vp->viewport_addr) & 0xff;