Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / usb / musb / da8xx.c

diff --git a/qemu/roms/u-boot/drivers/usb/musb/da8xx.c b/qemu/roms/u-boot/drivers/usb/musb/da8xx.c
new file mode 100644 (file)
index 0000000..97d4ddb
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/usb/musb/da8xx.c
@@ -0,0 +1,128 @@
+/*
+ * da8xx.c - TI's DA8xx platform specific usb wrapper functions.
+ *
+ * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
+ *
+ * Based on drivers/usb/musb/davinci.c
+ *
+ * Copyright (C) 2009 Texas Instruments Incorporated
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+#include <common.h>
+
+#include "musb_core.h"
+#include <asm/arch/da8xx-usb.h>
+
+/* MUSB platform configuration */
+struct musb_config musb_cfg = {
+       .regs           = (struct musb_regs *)DA8XX_USB_OTG_CORE_BASE,
+       .timeout        = DA8XX_USB_OTG_TIMEOUT,
+       .musb_speed     = 0,
+};
+
+/*
+ * This function enables VBUS by driving the GPIO Bank4 Pin 15 high.
+ */
+static void enable_vbus(void)
+{
+       u32 value;
+
+       /* configure GPIO bank4 pin 15 in output direction */
+       value = readl(&davinci_gpio_bank45->dir);
+       writel((value & (~DA8XX_USB_VBUS_GPIO)), &davinci_gpio_bank45->dir);
+
+       /* set GPIO bank4 pin 15 high to drive VBUS */
+       value = readl(&davinci_gpio_bank45->set_data);
+       writel((value | DA8XX_USB_VBUS_GPIO), &davinci_gpio_bank45->set_data);
+}
+
+/*
+ * Enable the usb0 phy. This initialization procedure is explained in
+ * the DA8xx USB user guide document.
+ */
+static u8 phy_on(void)
+{
+       u32 timeout;
+       u32 cfgchip2;
+
+       cfgchip2 = readl(&davinci_syscfg_regs->cfgchip2);
+
+       cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
+                     CFGCHIP2_OTGMODE | CFGCHIP2_REFFREQ);
+       cfgchip2 |= CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN | CFGCHIP2_PHY_PLLON |
+                   CFGCHIP2_REFFREQ_24MHZ;
+
+       writel(cfgchip2, &davinci_syscfg_regs->cfgchip2);
+
+       /* wait until the usb phy pll locks */
+       timeout = musb_cfg.timeout;
+       while (timeout--)
+               if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
+                       return 1;
+
+       /* USB phy was not turned on */
+       return 0;
+}
+
+/*
+ * Disable the usb phy
+ */
+static void phy_off(void)
+{
+       u32 cfgchip2;
+
+       /*
+        * Power down the on-chip PHY.
+        */
+       cfgchip2 = readl(&davinci_syscfg_regs->cfgchip2);
+       cfgchip2 &= ~CFGCHIP2_PHY_PLLON;
+       cfgchip2 |= CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN;
+       writel(cfgchip2, &davinci_syscfg_regs->cfgchip2);
+}
+
+/*
+ * This function performs DA8xx platform specific initialization for usb0.
+ */
+int musb_platform_init(void)
+{
+       u32  revision;
+
+       /* enable psc for usb2.0 */
+       lpsc_on(33);
+
+       /* enable usb vbus */
+       enable_vbus();
+
+       /* reset the controller */
+       writel(0x1, &da8xx_usb_regs->control);
+       udelay(5000);
+
+       /* start the on-chip usb phy and its pll */
+       if (phy_on() == 0)
+               return -1;
+
+       /* Returns zero if e.g. not clocked */
+       revision = readl(&da8xx_usb_regs->revision);
+       if (revision == 0)
+               return -1;
+
+       /* Disable all interrupts */
+       writel((DA8XX_USB_USBINT_MASK | DA8XX_USB_TXINT_MASK |
+               DA8XX_USB_RXINT_MASK), &da8xx_usb_regs->intmsk_set);
+       return 0;
+}
+
+/*
+ * This function performs DA8xx platform specific deinitialization for usb0.
+ */
+void musb_platform_deinit(void)
+{
+       /* Turn of the phy */
+       phy_off();
+
+       /* flush any interrupts */
+       writel((DA8XX_USB_USBINT_MASK | DA8XX_USB_TXINT_MASK |
+               DA8XX_USB_RXINT_MASK), &da8xx_usb_regs->intmsk_clr);
+       writel(0, &da8xx_usb_regs->eoi);
+}