1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2015 Broadcom Corporation.
4  */
5 
6 #include <config.h>
7 #include <common.h>
8 #include <asm/io.h>
9 #include <asm/arch/sysmap.h>
10 #include <asm/kona-common/clk.h>
11 
12 #include "dwc2_udc_otg_priv.h"
13 #include "bcm_udc_otg.h"
14 
15 void otg_phy_init(struct dwc2_udc *dev)
16 {
17 	/* turn on the USB OTG clocks */
18 	clk_usb_otg_enable((void *)HSOTG_BASE_ADDR);
19 
20 	/* set Phy to driving mode */
21 	wfld_clear(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
22 		   HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK);
23 
24 	udelay(100);
25 
26 	/* clear Soft Disconnect */
27 	wfld_clear(HSOTG_BASE_ADDR + HSOTG_DCTL_OFFSET,
28 		   HSOTG_DCTL_SFTDISCON_MASK);
29 
30 	/* invoke Reset (active low) */
31 	wfld_clear(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
32 		   HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK);
33 
34 	/* Reset needs to be asserted for 2ms */
35 	udelay(2000);
36 
37 	/* release Reset */
38 	wfld_set(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
39 		 HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK,
40 		 HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK);
41 }
42 
43 void otg_phy_off(struct dwc2_udc *dev)
44 {
45 	/* Soft Disconnect */
46 	wfld_set(HSOTG_BASE_ADDR + HSOTG_DCTL_OFFSET,
47 		 HSOTG_DCTL_SFTDISCON_MASK,
48 		 HSOTG_DCTL_SFTDISCON_MASK);
49 
50 	/* set Phy to non-driving (reset) mode */
51 	wfld_set(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
52 		 HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK,
53 		 HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK);
54 }
55