Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / usb / musb / davinci.c

diff --git a/qemu/roms/u-boot/drivers/usb/musb/davinci.c b/qemu/roms/u-boot/drivers/usb/musb/davinci.c
new file mode 100644 (file)
index 0000000..a9707a8
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/usb/musb/davinci.c
@@ -0,0 +1,124 @@
+/*
+ * TI's Davinci platform specific USB wrapper functions.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ *
+ * Author: Thomas Abraham t-abraham@ti.com, Texas Instruments
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include "davinci.h"
+#include <asm/arch/hardware.h>
+
+#if !defined(CONFIG_DV_USBPHY_CTL)
+#define CONFIG_DV_USBPHY_CTL (USBPHY_SESNDEN | USBPHY_VBDTCTEN)
+#endif
+
+/* MUSB platform configuration */
+struct musb_config musb_cfg = {
+       .regs           = (struct musb_regs *)MENTOR_USB0_BASE,
+       .timeout        = DAVINCI_USB_TIMEOUT,
+       .musb_speed     = 0,
+};
+
+/* MUSB module register overlay */
+struct davinci_usb_regs *dregs;
+
+/*
+ * Enable the USB phy
+ */
+static u8 phy_on(void)
+{
+       u32 timeout;
+#ifdef DAVINCI_DM365EVM
+       u32 val;
+#endif
+       /* Wait until the USB phy is turned on */
+#ifdef DAVINCI_DM365EVM
+       writel(USBPHY_PHY24MHZ | USBPHY_SESNDEN |
+                       USBPHY_VBDTCTEN, USBPHY_CTL_PADDR);
+#else
+       writel(CONFIG_DV_USBPHY_CTL, USBPHY_CTL_PADDR);
+#endif
+       timeout = musb_cfg.timeout;
+
+#ifdef DAVINCI_DM365EVM
+       /* Set the ownership of GIO33 to USB */
+       val = readl(PINMUX4);
+       val &= ~(PINMUX4_USBDRVBUS_BITCLEAR);
+       val |= PINMUX4_USBDRVBUS_BITSET;
+       writel(val, PINMUX4);
+#endif
+       while (timeout--)
+               if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD)
+                       return 1;
+
+       /* USB phy was not turned on */
+       return 0;
+}
+
+/*
+ * Disable the USB phy
+ */
+static void phy_off(void)
+{
+       /* powerdown the on-chip PHY and its oscillator */
+       writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR);
+}
+
+void __enable_vbus(void)
+{
+       /*
+        *  nothing to do, vbus is handled through the cpu.
+        *  Define this function in board code, if it is
+        *  different on your board.
+        */
+}
+void  enable_vbus(void)
+       __attribute__((weak, alias("__enable_vbus")));
+
+/*
+ * This function performs Davinci platform specific initialization for usb0.
+ */
+int musb_platform_init(void)
+{
+       u32  revision;
+
+       /* enable USB VBUS */
+       enable_vbus();
+
+       /* start the on-chip USB phy and its pll */
+       if (!phy_on())
+               return -1;
+
+       /* reset the controller */
+       dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE;
+       writel(1, &dregs->ctrlr);
+       udelay(5000);
+
+       /* Returns zero if e.g. not clocked */
+       revision = readl(&dregs->version);
+       if (!revision)
+               return -1;
+
+       /* Disable all interrupts */
+       writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK |
+                       DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr);
+       return 0;
+}
+
+/*
+ * This function performs Davinci platform specific deinitialization for usb0.
+ */
+void musb_platform_deinit(void)
+{
+       /* Turn of the phy */
+       phy_off();
+
+       /* flush any interrupts */
+       writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK |
+                       DAVINCI_USB_RXINT_MASK , &dregs->intclrr);
+}