hw/usb: Add basic i.MX USB Phy support

Add basic USB PHY support as implemented in i.MX23, i.MX28, i.MX6,
and i.MX7 SoCs.

The only support really needed - at least to boot Linux - is support
for soft reset, which needs to reset various registers to their initial
value. Otherwise, just record register values.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 20200313014551.12554-2-linux@roeck-us.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/include/hw/usb/imx-usb-phy.h b/include/hw/usb/imx-usb-phy.h
new file mode 100644
index 0000000000..07f0235d10
--- /dev/null
+++ b/include/hw/usb/imx-usb-phy.h
@@ -0,0 +1,53 @@
+#ifndef IMX_USB_PHY_H
+#define IMX_USB_PHY_H
+
+#include "hw/sysbus.h"
+#include "qemu/bitops.h"
+
+enum IMXUsbPhyRegisters {
+    USBPHY_PWD,
+    USBPHY_PWD_SET,
+    USBPHY_PWD_CLR,
+    USBPHY_PWD_TOG,
+    USBPHY_TX,
+    USBPHY_TX_SET,
+    USBPHY_TX_CLR,
+    USBPHY_TX_TOG,
+    USBPHY_RX,
+    USBPHY_RX_SET,
+    USBPHY_RX_CLR,
+    USBPHY_RX_TOG,
+    USBPHY_CTRL,
+    USBPHY_CTRL_SET,
+    USBPHY_CTRL_CLR,
+    USBPHY_CTRL_TOG,
+    USBPHY_STATUS,
+    USBPHY_DEBUG = 0x14,
+    USBPHY_DEBUG_SET,
+    USBPHY_DEBUG_CLR,
+    USBPHY_DEBUG_TOG,
+    USBPHY_DEBUG0_STATUS,
+    USBPHY_DEBUG1 = 0x1c,
+    USBPHY_DEBUG1_SET,
+    USBPHY_DEBUG1_CLR,
+    USBPHY_DEBUG1_TOG,
+    USBPHY_VERSION,
+    USBPHY_MAX
+};
+
+#define USBPHY_CTRL_SFTRST BIT(31)
+
+#define TYPE_IMX_USBPHY "imx.usbphy"
+#define IMX_USBPHY(obj) OBJECT_CHECK(IMXUSBPHYState, (obj), TYPE_IMX_USBPHY)
+
+typedef struct IMXUSBPHYState {
+    /* <private> */
+    SysBusDevice parent_obj;
+
+    /* <public> */
+    MemoryRegion iomem;
+
+    uint32_t usbphy[USBPHY_MAX];
+} IMXUSBPHYState;
+
+#endif /* IMX_USB_PHY_H */