usb/ulpi/ulpi-viewport.c

1 // SPDX-License-Identifier: GPL-2.0
18 #include <usb/ulpi.h>
20 /* ULPI viewport control bits */
27  * Wait for the ULPI request to complete
29  * @ulpi_viewport	- the address of the viewport
30  * @mask		- expected value to wait for
32  * returns 0 on mask match, ULPI_ERROR on time out.
39 	while (--timeout) {  in ulpi_wait()
40 		if ((readl(ulpi_vp->viewport_addr) & mask) == 0)  in ulpi_wait()
41 			return 0;  in ulpi_wait()
50  * Wake the ULPI PHY up for communication
52  * returns 0 on success.
58 	if (readl(ulpi_vp->viewport_addr) & ULPI_SS)  in ulpi_wakeup()
59 		return 0; /* already awake */  in ulpi_wakeup()
61 	writel(ULPI_WU, ulpi_vp->viewport_addr);  in ulpi_wakeup()
65 		printf("ULPI wakeup timed out\n");  in ulpi_wakeup()
71  * Issue a ULPI read/write request
73  * @value - the ULPI request
83 	writel(value, ulpi_vp->viewport_addr);  in ulpi_request()
87 		printf("ULPI request timed out\n");  in ulpi_request()
94 	u32 addr = (uintptr_t)reg & 0xFF;  in ulpi_write()
95 	u32 val = ULPI_RWRUN | ULPI_RWCTRL | addr << 16 | (value & 0xff);  in ulpi_write()
97 	val |= (ulpi_vp->port_num & 0x7) << 24;  in ulpi_write()
104 	u32 val = ULPI_RWRUN | ((uintptr_t)reg & 0xFF) << 16;  in ulpi_read()
106 	val |= (ulpi_vp->port_num & 0x7) << 24;  in ulpi_read()
111 	return (readl(ulpi_vp->viewport_addr) >> 8) & 0xff;  in ulpi_read()