[src/trunk]: src/sys/arch/arm/ep93xx ep93xx processor on-chip USB OHCI driver...

[joff <joff%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/731a20d3bd64
branches:  trunk
changeset: 572161:731a20d3bd64
user:      joff <joff%NetBSD.org@localhost>
date:      Wed Dec 22 19:11:49 2004 +0000

description:
ep93xx processor on-chip USB OHCI driver glue

diffstat:

 sys/arch/arm/ep93xx/epohci.c |  159 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 159 insertions(+), 0 deletions(-)

diffs (163 lines):

diff -r 2d135035a61b -r 731a20d3bd64 sys/arch/arm/ep93xx/epohci.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/ep93xx/epohci.c      Wed Dec 22 19:11:49 2004 +0000
@@ -0,0 +1,159 @@
+/*     $NetBSD: epohci.c,v 1.1 2004/12/22 19:11:49 joff Exp $ */
+
+/*-
+ * Copyright (c) 2004 Jesse Off
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * USB Open Host Controller driver.
+ *
+ * OHCI spec: ftp://ftp.compaq.com/pub/supportinformation/papers/hcir1_0a.exe
+ * USB spec: http://www.usb.org/developers/data/usb11.pdf
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: epohci.c,v 1.1 2004/12/22 19:11:49 joff Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/proc.h>
+#include <sys/queue.h>
+
+/* busdma */
+#include <sys/mbuf.h>
+#include <uvm/uvm_extern.h>
+
+#include <machine/bus.h>
+
+#include <dev/usb/usb.h>
+#include <dev/usb/usbdi.h>
+#include <dev/usb/usbdivar.h>
+#include <dev/usb/usb_mem.h>
+
+#include <dev/usb/ohcireg.h>
+#include <dev/usb/ohcivar.h>
+
+#include <arm/ep93xx/ep93xxreg.h>
+#include <arm/ep93xx/ep93xxvar.h>
+#include <arm/ep93xx/epsocvar.h>
+
+int epohci_match(struct device *, struct cfdata *, void *);
+void epohci_attach(struct device *, struct device *, void *);
+void epohci_callback(struct device *);
+
+struct epohci_softc {
+       struct ohci_softc sc;
+       void    *sc_ih;
+       int     sc_intr;
+};
+
+CFATTACH_DECL(epohci, sizeof(struct epohci_softc),
+    epohci_match, epohci_attach, NULL, NULL);
+
+int
+epohci_match(struct device *parent, struct cfdata *match, void *aux)
+{
+       /* EP93xx builtin OHCI module */
+
+       return (1);
+}
+
+void
+epohci_attach(struct device *parent, struct device *self, void *aux)
+{
+       struct epohci_softc *sc = (struct epohci_softc *)self;
+       struct epsoc_attach_args *sa = aux;
+       u_int32_t i;
+       bus_space_handle_t syscon_ioh;
+
+       sc->sc.iot = sa->sa_iot;
+       sc->sc.sc_bus.dmatag = sa->sa_dmat;
+       sc->sc_intr = sa->sa_intr;
+
+       /* Map I/O space */
+       if (bus_space_map(sc->sc.iot, sa->sa_addr, sa->sa_size, 
+           0, &sc->sc.ioh)) {
+               printf(": cannot map mem space\n");
+               return;
+       }
+
+       /* Enable hclk clock gating to the USB block. */
+
+       bus_space_map(sc->sc.iot, EP93XX_APB_HWBASE + EP93XX_APB_SYSCON,
+               EP93XX_APB_SYSCON_SIZE, 0, &syscon_ioh);
+       i = bus_space_read_4(sc->sc.iot, syscon_ioh, EP93XX_SYSCON_PwrCnt);
+       i |= 0x10000000;
+       bus_space_write_4(sc->sc.iot, syscon_ioh, EP93XX_SYSCON_PwrCnt, i);
+
+       /*
+        * Not sure if I understand the datasheet here, but we must wait a
+        * few instructions and also make certain PLL2 is stable before
+        * continuing.  Hopefully, the check for PLL2 is enough, as the
+        * datasheet is elusive to actually how many insns we need.
+        */
+
+       do {
+               i = bus_space_read_4(sc->sc.iot, syscon_ioh, 
+                       EP93XX_SYSCON_PwrSts);
+       } while ((i & 0x100) == 0);
+       bus_space_unmap(sc->sc.iot, syscon_ioh, EP93XX_APB_SYSCON_SIZE);
+
+       printf("\n");
+
+        /* Defer the rest until later */
+        config_defer(self, epohci_callback);
+}
+
+void
+epohci_callback(self)
+        struct device *self;
+{
+       struct epohci_softc *sc = (struct epohci_softc *)self;
+       usbd_status r;
+
+       /* Disable interrupts, so we don't get any spurious ones. */
+       bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE,
+                         OHCI_ALL_INTRS);
+
+       strlcpy(sc->sc.sc_vendor, "Cirrus Logic", sizeof sc->sc.sc_vendor);
+
+       sc->sc_ih = ep93xx_intr_establish(sc->sc_intr, IPL_USB, 
+               ohci_intr, sc);
+       r = ohci_init(&sc->sc);
+
+       if (r != USBD_NORMAL_COMPLETION) {
+               printf("%s: init failed, error=%d\n", sc->sc.sc_bus.bdev.dv_xname, r);
+
+               ep93xx_intr_disestablish(sc->sc_ih);
+               return;
+       }
+
+       /* Attach usb device. */
+       sc->sc.sc_child = config_found((void *) sc, &sc->sc.sc_bus,
+           usbctlprint);
+
+}