2 * TI's Davinci platform specific USB wrapper functions.
4 * Copyright (c) 2008 Texas Instruments
6 * SPDX-License-Identifier: GPL-2.0+
8 * Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
14 #include <asm/arch/hardware.h>
16 #if !defined(CONFIG_DV_USBPHY_CTL)
17 #define CONFIG_DV_USBPHY_CTL (USBPHY_SESNDEN | USBPHY_VBDTCTEN)
20 /* MUSB platform configuration */
21 struct musb_config musb_cfg = {
22 .regs = (struct musb_regs *)MENTOR_USB0_BASE,
23 .timeout = DAVINCI_USB_TIMEOUT,
27 /* MUSB module register overlay */
28 struct davinci_usb_regs *dregs;
33 static u8 phy_on(void)
36 #ifdef DAVINCI_DM365EVM
39 /* Wait until the USB phy is turned on */
40 #ifdef DAVINCI_DM365EVM
41 writel(USBPHY_PHY24MHZ | USBPHY_SESNDEN |
42 USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
44 writel(CONFIG_DV_USBPHY_CTL, USBPHY_CTL_PADDR);
46 timeout = musb_cfg.timeout;
48 #ifdef DAVINCI_DM365EVM
49 /* Set the ownership of GIO33 to USB */
51 val &= ~(PINMUX4_USBDRVBUS_BITCLEAR);
52 val |= PINMUX4_USBDRVBUS_BITSET;
56 if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
59 /* USB phy was not turned on */
66 static void phy_off(void)
68 /* powerdown the on-chip PHY and its oscillator */
69 writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
72 void __enable_vbus(void)
75 * nothing to do, vbus is handled through the cpu.
76 * Define this function in board code, if it is
77 * different on your board.
80 void enable_vbus(void)
81 __attribute__((weak, alias("__enable_vbus")));
84 * This function performs Davinci platform specific initialization for usb0.
86 int musb_platform_init(void)
93 /* start the on-chip USB phy and its pll */
97 /* reset the controller */
98 dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
99 writel(1, &dregs->ctrlr);
102 /* Returns zero if e.g. not clocked */
103 revision = readl(&dregs->version);
107 /* Disable all interrupts */
108 writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK |
109 DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
114 * This function performs Davinci platform specific deinitialization for usb0.
116 void musb_platform_deinit(void)
118 /* Turn of the phy */
121 /* flush any interrupts */
122 writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK |
123 DAVINCI_USB_RXINT_MASK , &dregs->intclrr);