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 * SPDX-License-Identifier: GPL-2.0
15 #define OMAP_ULPI_WR_OPSEL (2 << 22)
16 #define OMAP_ULPI_RD_OPSEL (3 << 22)
17 #define OMAP_ULPI_START (1 << 31)
20 * Wait for having ulpi in done state
22 static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask)
24 int timeout = CONFIG_USB_ULPI_TIMEOUT;
27 if (!(readl(ulpi_vp->viewport_addr) & mask))
37 * Issue a ULPI read/write request
39 static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
43 writel(value, ulpi_vp->viewport_addr);
45 err = ulpi_wait(ulpi_vp, OMAP_ULPI_START);
47 debug("ULPI request timed out\n");
52 int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value)
54 u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
55 OMAP_ULPI_WR_OPSEL | ((u32)reg << 16) | (value & 0xff);
57 return ulpi_request(ulpi_vp, val);
60 u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg)
63 u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
64 OMAP_ULPI_RD_OPSEL | ((u32)reg << 16);
66 err = ulpi_request(ulpi_vp, val);
70 return readl(ulpi_vp->viewport_addr) & 0xff;