1 // SPDX-License-Identifier: GPL-2.0+
3 * TI's Davinci platform specific USB wrapper functions.
5 * Copyright (c) 2008 Texas Instruments
7 * Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
13 #include <asm/arch/hardware.h>
15 #if !defined(CONFIG_DV_USBPHY_CTL)
16 #define CONFIG_DV_USBPHY_CTL (USBPHY_SESNDEN | USBPHY_VBDTCTEN)
19 /* MUSB platform configuration */
20 struct musb_config musb_cfg = {
21 .regs = (struct musb_regs *)MENTOR_USB0_BASE,
22 .timeout = DAVINCI_USB_TIMEOUT,
26 /* MUSB module register overlay */
27 struct davinci_usb_regs *dregs;
32 static u8 phy_on(void)
35 #ifdef DAVINCI_DM365EVM
38 /* Wait until the USB phy is turned on */
39 #ifdef DAVINCI_DM365EVM
40 writel(USBPHY_PHY24MHZ | USBPHY_SESNDEN |
41 USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
43 writel(CONFIG_DV_USBPHY_CTL, USBPHY_CTL_PADDR);
45 timeout = musb_cfg.timeout;
47 #ifdef DAVINCI_DM365EVM
48 /* Set the ownership of GIO33 to USB */
50 val &= ~(PINMUX4_USBDRVBUS_BITCLEAR);
51 val |= PINMUX4_USBDRVBUS_BITSET;
55 if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
58 /* USB phy was not turned on */
65 static void phy_off(void)
67 /* powerdown the on-chip PHY and its oscillator */
68 writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
71 void __enable_vbus(void)
74 * nothing to do, vbus is handled through the cpu.
75 * Define this function in board code, if it is
76 * different on your board.
79 void enable_vbus(void)
80 __attribute__((weak, alias("__enable_vbus")));
83 * This function performs Davinci platform specific initialization for usb0.
85 int musb_platform_init(void)
92 /* start the on-chip USB phy and its pll */
96 /* reset the controller */
97 dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
98 writel(1, &dregs->ctrlr);
101 /* Returns zero if e.g. not clocked */
102 revision = readl(&dregs->version);
106 /* Disable all interrupts */
107 writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK |
108 DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
113 * This function performs Davinci platform specific deinitialization for usb0.
115 void musb_platform_deinit(void)
117 /* Turn of the phy */
120 /* flush any interrupts */
121 writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK |
122 DAVINCI_USB_RXINT_MASK , &dregs->intclrr);