USB ehci core support

Add USB ehci core support

Signed-off-by: Michael Trimarchi <trimarchi@gandalf.sssup.it>
Signed-off-by: Remy Böhmer <linux@bohmer.net>

1 files changed, 121 insertions, 0 deletions

diff --git a/drivers/usb/usb_ehci.h b/drivers/usb/usb_ehci.h
new file mode 100644
index 0000000..ebffb44
--- /dev/null
+++ b/drivers/usb/usb_ehci.h
@@ -0,0 +1,121 @@
+/*-
+ * Copyright (c) 2007-2008, Juniper Networks, Inc.
+ * All rights reserved.
+ *
+ * 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 version 2 of
+ * the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef USB_EHCI_H
+#define USB_EHCI_H
+
+/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
+#define DeviceRequest \
+	((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_DEVICE) << 8)
+#define DeviceOutRequest \
+	((USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE) << 8)
+
+#define InterfaceRequest \
+	((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8)
+
+#define EndpointRequest \
+	((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8)
+#define EndpointOutRequest \
+	((USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8)
+
+/*
+ * Register Space.
+ */
+struct ehci_hccr {
+	uint8_t cr_caplength;
+	uint16_t cr_hciversion;
+	uint32_t cr_hcsparams;
+	uint32_t cr_hccparams;
+	uint8_t cr_hcsp_portrt[8];
+};
+
+struct ehci_hcor {
+	uint32_t or_usbcmd;
+	uint32_t or_usbsts;
+	uint32_t or_usbintr;
+	uint32_t or_frindex;
+	uint32_t or_ctrldssegment;
+	uint32_t or_periodiclistbase;
+	uint32_t or_asynclistaddr;
+	uint32_t _reserved_[9];
+	uint32_t or_configflag;
+	uint32_t or_portsc[2];
+	uint32_t or_systune;
+};
+
+#define EHCI_PS_WKOC_E		0x00400000	/* RW wake on over current */
+#define EHCI_PS_WKDSCNNT_E	0x00200000	/* RW wake on disconnect */
+#define EHCI_PS_WKCNNT_E	0x00100000	/* RW wake on connect */
+#define EHCI_PS_PTC		0x000f0000	/* RW port test control */
+#define EHCI_PS_PIC		0x0000c000	/* RW port indicator control */
+#define EHCI_PS_PO		0x00002000	/* RW port owner */
+#define EHCI_PS_PP		0x00001000	/* RW,RO port power */
+#define EHCI_PS_LS		0x00000c00	/* RO line status */
+#define EHCI_PS_PR		0x00000100	/* RW port reset */
+#define EHCI_PS_SUSP		0x00000080	/* RW suspend */
+#define EHCI_PS_FPR		0x00000040	/* RW force port resume */
+#define EHCI_PS_OCC		0x00000020	/* RWC over current change */
+#define EHCI_PS_OCA		0x00000010	/* RO over current active */
+#define EHCI_PS_PEC		0x00000008	/* RWC port enable change */
+#define EHCI_PS_PE		0x00000004	/* RW port enable */
+#define EHCI_PS_CSC		0x00000002	/* RWC connect status change */
+#define EHCI_PS_CS		0x00000001	/* RO connect status */
+#define EHCI_PS_CLEAR		(EHCI_PS_OCC | EHCI_PS_PEC | EHCI_PS_CSC)
+
+#define EHCI_PS_IS_LOWSPEED(x)	(((x) & EHCI_PS_LS) == 0x00000400)
+
+/*
+ * Schedule Interface Space.
+ *
+ * IMPORTANT: Software must ensure that no interface data structure
+ * reachable by the EHCI host controller spans a 4K page boundary!
+ *
+ * Periodic transfers (i.e. isochronous and interrupt transfers) are
+ * not supported.
+ */
+
+/* Queue Element Transfer Descriptor (qTD). */
+struct qTD {
+	uint32_t qt_next;
+#define	QT_NEXT_TERMINATE	1
+	uint32_t qt_altnext;
+	uint32_t qt_token;
+	uint32_t qt_buffer[5];
+};
+
+/* Queue Head (QH). */
+struct QH {
+	uint32_t qh_link;
+#define	QH_LINK_TERMINATE	1
+#define	QH_LINK_TYPE_ITD	0
+#define	QH_LINK_TYPE_QH		2
+#define	QH_LINK_TYPE_SITD	4
+#define	QH_LINK_TYPE_FSTN	6
+	uint32_t qh_endpt1;
+	uint32_t qh_endpt2;
+	uint32_t qh_curtd;
+	struct qTD qh_overlay;
+};
+
+/* Low level intit functions */
+
+int ehci_hcd_init(void);
+int ehci_hcd_stop(void);
+#endif /* USB_EHCI_H */