usb: phy: add a new driver for usb part of control module

Added a new driver for the usb part of control module. This has an API
to power on the USB2 phy and an API to write to the mailbox depending on
whether MUSB has to act in host mode or in device mode.

Writing to control module registers for doing the above task which was
previously done in omap glue and in omap-usb2 phy will be removed.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 92 insertions, 0 deletions

diff --git a/include/linux/usb/omap_control_usb.h b/include/linux/usb/omap_control_usb.h
new file mode 100644
index 000000000000..f306db7149ca
--- /dev/null
+++ b/include/linux/usb/omap_control_usb.h
@@ -0,0 +1,92 @@
+/*
+ * omap_control_usb.h - Header file for the USB part of control module.
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __OMAP_CONTROL_USB_H__
+#define __OMAP_CONTROL_USB_H__
+
+struct omap_control_usb {
+        struct device *dev;
+
+        u32 __iomem *dev_conf;
+        u32 __iomem *otghs_control;
+        u32 __iomem *phy_power;
+
+        struct clk *sys_clk;
+
+        u32 type;
+};
+
+struct omap_control_usb_platform_data {
+        u8 type;
+};
+
+enum omap_control_usb_mode {
+        USB_MODE_UNDEFINED = 0,
+        USB_MODE_HOST,
+        USB_MODE_DEVICE,
+        USB_MODE_DISCONNECT,
+};
+
+/* To differentiate ctrl module IP having either mailbox or USB3 PHY power */
+#define OMAP_CTRL_DEV_TYPE1             0x1
+#define OMAP_CTRL_DEV_TYPE2             0x2
+
+#define OMAP_CTRL_DEV_PHY_PD            BIT(0)
+
+#define OMAP_CTRL_DEV_AVALID            BIT(0)
+#define OMAP_CTRL_DEV_BVALID            BIT(1)
+#define OMAP_CTRL_DEV_VBUSVALID         BIT(2)
+#define OMAP_CTRL_DEV_SESSEND           BIT(3)
+#define OMAP_CTRL_DEV_IDDIG             BIT(4)
+
+#define OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK       0x003FC000
+#define OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT      0xE
+
+#define OMAP_CTRL_USB_PWRCTL_CLK_FREQ_MASK      0xFFC00000
+#define OMAP_CTRL_USB_PWRCTL_CLK_FREQ_SHIFT     0x16
+
+#define OMAP_CTRL_USB3_PHY_TX_RX_POWERON        0x3
+#define OMAP_CTRL_USB3_PHY_TX_RX_POWEROFF       0x0
+
+#if IS_ENABLED(CONFIG_OMAP_CONTROL_USB)
+extern struct device *omap_get_control_dev(void);
+extern void omap_control_usb_phy_power(struct device *dev, int on);
+extern void omap_control_usb3_phy_power(struct device *dev, bool on);
+extern void omap_control_usb_set_mode(struct device *dev,
+        enum omap_control_usb_mode mode);
+#else
+static inline struct device *omap_get_control_dev()
+{
+        return ERR_PTR(-ENODEV);
+}
+
+static inline void omap_control_usb_phy_power(struct device *dev, int on)
+{
+}
+
+static inline void omap_control_usb3_phy_power(struct device *dev, int on)
+{
+}
+
+static inline void omap_control_usb_set_mode(struct device *dev,
+        enum omap_control_usb_mode mode)
+{
+}
+#endif
+
+#endif  /* __OMAP_CONTROL_USB_H__ */