Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2011 Google, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/iopoll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/usb/otg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/usb/ulpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define ULPI_VIEW_WAKEUP	(1 << 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define ULPI_VIEW_RUN		(1 << 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define ULPI_VIEW_WRITE		(1 << 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define ULPI_VIEW_READ		(0 << 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define ULPI_VIEW_ADDR(x)	(((x) & 0xff) << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define ULPI_VIEW_DATA_READ(x)	(((x) >> 8) & 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define ULPI_VIEW_DATA_WRITE(x)	((x) & 0xff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int ulpi_viewport_wait(void __iomem *view, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	return readl_poll_timeout_atomic(view, val, !(val & mask), 1, 2000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int ulpi_viewport_read(struct usb_phy *otg, u32 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	void __iomem *view = otg->io_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	writel(ULPI_VIEW_RUN | ULPI_VIEW_READ | ULPI_VIEW_ADDR(reg), view);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	ret = ulpi_viewport_wait(view, ULPI_VIEW_RUN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	return ULPI_VIEW_DATA_READ(readl(view));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int ulpi_viewport_write(struct usb_phy *otg, u32 val, u32 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	void __iomem *view = otg->io_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	writel(ULPI_VIEW_RUN | ULPI_VIEW_WRITE | ULPI_VIEW_DATA_WRITE(val) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 						 ULPI_VIEW_ADDR(reg), view);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	return ulpi_viewport_wait(view, ULPI_VIEW_RUN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct usb_phy_io_ops ulpi_viewport_access_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	.read	= ulpi_viewport_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	.write	= ulpi_viewport_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) EXPORT_SYMBOL_GPL(ulpi_viewport_access_ops);