a driver for the rng on the amd768 power management device (no actual power management capabilities are supported yet; from netbsd

4 files changed, 267 insertions, 25 deletions

diff --git a/sys/dev/pci/amdpm.c b/sys/dev/pci/amdpm.c
new file mode 100644
index 00000000000..6c5e5f3ed0e
--- /dev/null
+++ b/sys/dev/pci/amdpm.c
@@ -0,0 +1,171 @@
+/*	$OpenBSD: amdpm.c,v 1.1 2002/06/05 22:35:16 mickey Exp $	*/
+
+/*-
+ * Copyright (c) 2002 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Enami Tsugutomo.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/timeout.h>
+
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcidevs.h>
+
+#include <dev/rndvar.h>
+#include <dev/pci/amdpmreg.h>
+
+struct amdpm_softc {
+	struct device sc_dev;
+
+	pci_chipset_tag_t sc_pc;
+	pcitag_t sc_tag;
+
+	bus_space_tag_t sc_iot;
+	bus_space_handle_t sc_ioh;		/* PMxx space */
+
+	struct timeout sc_rnd_ch;
+#ifdef AMDPM_RND_COUNTERS
+	struct evcnt sc_rnd_hits;
+	struct evcnt sc_rnd_miss;
+	struct evcnt sc_rnd_data[256];
+#endif
+};
+
+int	amdpm_match(struct device *, void *, void *);
+void	amdpm_attach(struct device *, struct device *, void *);
+void	amdpm_rnd_callout(void *);
+
+struct cfattach amdpm_ca = {
+	sizeof(struct amdpm_softc), amdpm_match, amdpm_attach
+};
+
+#ifdef AMDPM_RND_COUNTERS
+#define	AMDPM_RNDCNT_INCR(ev)	(ev)->ev_count++
+#else
+#define	AMDPM_RNDCNT_INCR(ev)	/* nothing */
+#endif
+
+int
+amdpm_match(struct device *parent, void *match, void *aux)
+{
+	struct pci_attach_args *pa = aux;
+
+	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD &&
+	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC768_PMC)
+		return (1);
+	return (0);
+}
+
+void
+amdpm_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct amdpm_softc *sc = (struct amdpm_softc *) self;
+	struct pci_attach_args *pa = aux;
+	pcireg_t reg;
+	u_int32_t pmreg;
+	int i;
+
+	sc->sc_pc = pa->pa_pc;
+	sc->sc_tag = pa->pa_tag;
+	sc->sc_iot = pa->pa_iot;
+
+	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG);
+	if ((reg & AMDPM_PMIOEN) == 0) {
+		printf(": PMxx space isn't enabled\n");
+		return;
+	}
+	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR);
+	if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(reg), AMDPM_PMSIZE,
+	    0, &sc->sc_ioh)) {
+		printf(": failed to map PMxx space\n");
+		return;
+	}
+
+	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG);
+	if (reg & AMDPM_RNGEN) {
+		/* Check to see if we can read data from the RNG. */
+		(void) bus_space_read_4(sc->sc_iot, sc->sc_ioh,
+		    AMDPM_RNGDATA);
+		for (i = 0; i < 1000; i++) {
+			pmreg = bus_space_read_4(sc->sc_iot,
+			    sc->sc_ioh, AMDPM_RNGSTAT);
+			if (pmreg & AMDPM_RNGDONE)
+				break;
+			delay(1);
+		}
+		if ((pmreg & AMDPM_RNGDONE) != 0) {
+			printf(": rng active (apprx. %dms)\n", i);
+			timeout_set(&sc->sc_rnd_ch, amdpm_rnd_callout, sc);
+#ifdef AMDPM_RND_COUNTERS
+			evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC,
+			    NULL, sc->sc_dev.dv_xname, "rnd hits");
+			evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC,
+			    NULL, sc->sc_dev.dv_xname, "rnd miss");
+			for (i = 0; i < 256; i++) {
+				evcnt_attach_dynamic(&sc->sc_rnd_data[i],
+				    EVCNT_TYPE_MISC, NULL, sc->sc_dev.dv_xname,
+				    "rnd data");
+			}
+#endif
+			amdpm_rnd_callout(sc);
+		}
+	}
+}
+
+void
+amdpm_rnd_callout(void *v)
+{
+	struct amdpm_softc *sc = v;
+	u_int32_t reg;
+#ifdef AMDPM_RND_COUNTERS
+	int i;
+#endif
+
+	if ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) &
+	    AMDPM_RNGDONE) != 0) {
+		reg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGDATA);
+		add_true_randomness(reg);
+#ifdef AMDPM_RND_COUNTERS
+		AMDPM_RNDCNT_INCR(&sc->sc_rnd_hits);
+		for (i = 0; i < sizeof(reg); i++, reg >>= NBBY)
+			AMDPM_RNDCNT_INCR(&sc->sc_rnd_data[reg & 0xff]);
+#endif
+	} else
+		AMDPM_RNDCNT_INCR(&sc->sc_rnd_miss);
+	timeout_add(&sc->sc_rnd_ch, 1);
+}
diff --git a/sys/dev/pci/amdpmreg.h b/sys/dev/pci/amdpmreg.h
new file mode 100644
index 00000000000..f44a2db31c4
--- /dev/null
+++ b/sys/dev/pci/amdpmreg.h
@@ -0,0 +1,58 @@
+/*	$NetBSD$	*/
+
+/*-
+ * Copyright (c) 2002 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Enami Tsugutomo.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#define	AMDPM_CONFREG	0x40
+
+/* 0x40: General Configuration 1 Register */
+#define	AMDPM_RNGEN	0x00000080	/* random number generator enable */
+
+/* 0x41: General Configuration 2 Register */
+#define	AMDPM_PMIOEN	0x00008000	/* system management IO space enable */
+
+/* 0x42: SCI Interrupt Configuration Register */
+/* 0x43: Previous Power State Register */
+
+#define	AMDPM_PMPTR	0x58		/* PMxx System Management IO space
+					   Pointer */
+#define	AMDPM_PMBASE(x)	((x) & 0xff00)	/* PMxx base address */
+#define	AMDPM_PMSIZE	256		/* PMxx space size */
+
+/* Registers in PMxx space */
+#define	AMDPM_RNGDATA	0xf0		/* 32 bit random data register */
+#define	AMDPM_RNGSTAT	0xf4		/* RNG status register */
+#define	AMDPM_RNGDONE	0x00000001	/* Random number generation complete */
diff --git a/sys/dev/pci/files.pci b/sys/dev/pci/files.pci
index e0e00ec18ca..be283d5efa6 100644
--- a/sys/dev/pci/files.pci
+++ b/sys/dev/pci/files.pci
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.pci,v 1.136 2002/06/03 16:13:21 mickey Exp $
+#	$OpenBSD: files.pci,v 1.137 2002/06/05 22:35:16 mickey Exp $
 #	$NetBSD: files.pci,v 1.20 1996/09/24 17:47:15 christos Exp $
 #
 # Config file and device description for machine-independent PCI code.
@@ -441,3 +441,9 @@ file	dev/pci/if_stge.c		stge
 device	gx: ether, ifnet, mii, ifmedia, mii_phy
 attach	gx at pci
 file	dev/pci/if_gx.c			gx
+
+# AMD 768MPX power management controller
+device	amdpm {}
+attach	amdpm at pci
+file	dev/pci/amdpm.c			amdpm
+
diff --git a/sys/dev/pci/pcidevs b/sys/dev/pci/pcidevs
index 4cad621f57a..8b12051b49e 100644
--- a/sys/dev/pci/pcidevs
+++ b/sys/dev/pci/pcidevs
@@ -1,4 +1,4 @@
-	$OpenBSD: pcidevs,v 1.516 2002/06/03 21:48:31 mickey Exp $
+	$OpenBSD: pcidevs,v 1.517 2002/06/05 22:35:16 mickey Exp $
 /*	$NetBSD: pcidevs,v 1.30 1997/06/24 06:20:24 thorpej Exp $ 	*/
 
 /*
@@ -780,32 +780,39 @@ product ALTEON BCM5701		0x0004	BCM5701 (Broadcom)
 product ALTIMA AC100X		0x03e8	AC100X
 
 /* AMD products */
-product AMD PCNET_PCI		0x2000	79c970 PCnet-PCI LANCE
-product AMD PCHOME_PCI		0x2001	79c978 PChome-PCI LANCE
-product AMD PCSCSI_PCI		0x2020	53c974 PCscsi-PCI SCSI
-product AMD PCNETS_PCI		0x2040	79C974 PCnet-PCI Ether+SCSI
-product AMD ELANSC520		0x3000	ElanSC520 Host-PCI
+product	AMD PCNET_PCI		0x2000	79c970 PCnet-PCI LANCE
+product	AMD PCHOME_PCI		0x2001	79c978 PChome-PCI LANCE
+product	AMD PCSCSI_PCI		0x2020	53c974 PCscsi-PCI SCSI
+product	AMD PCNETS_PCI		0x2040	79C974 PCnet-PCI Ether+SCSI
+product	AMD ELANSC520		0x3000	ElanSC520 Host-PCI
 /* http://www.amd.com/products/cpg/athlon/techdocs/pdf/21910.pdf */
-product AMD SC751_SC		0x7006	751 System Controller
-product AMD SC751_PPB		0x7007	751 PCI-PCI
+product	AMD SC751_SC		0x7006	751 System Controller
+product	AMD SC751_PPB		0x7007	751 PCI-PCI
 /* http://www.amd.com/products/cpg/athlon/techdocs/pdf/24462.pdf */
-product AMD 762_PCHB		0x700c	762 Host-PCI
-product AMD 762_PPB		0x700d	762 PCI-PCI
-product AMD 761_PCHB		0x700e	761 Host-PCI
-product AMD 761_PPB		0x700f	761 PCI-PCI
-product AMD 755_ISA		0x7400	755 PCI-ISA
-product AMD 755_IDE		0x7401	755 IDE
-product AMD 755_PMC		0x7403	755 Power Mgmt
-product AMD 755_USB		0x7404	755 USB
+product	AMD 762_PCHB		0x700c	762 Host-PCI
+product	AMD 762_PPB		0x700d	762 PCI-PCI
+product	AMD 761_PCHB		0x700e	761 Host-PCI
+product	AMD 761_PPB		0x700f	761 PCI-PCI
+product	AMD 755_ISA		0x7400	755 PCI-ISA
+product	AMD 755_IDE		0x7401	755 IDE
+product	AMD 755_PMC		0x7403	755 Power Mgmt
+product	AMD 755_USB		0x7404	755 USB
 /* http://www.amd.com/products/cpg/athlon/techdocs/pdf/22548.pdf */
-product AMD PBC756_ISA		0x7408	756 PCI-ISA
-product AMD PBC756_IDE		0x7409	756 IDE
-product AMD PBC756_PMC		0x740b	756 Power Mgmt
-product AMD PBC756_USB		0x740c	756 USB Host
-product AMD 766_ISA		0x7410	766 PCI-ISA
-product AMD 766_IDE		0x7411	766 IDE
-product AMD 766_USB		0x7412	766 USB
-product AMD 766_PMC		0x7413	766 Power Mgmt
+product	AMD PBC756_ISA		0x7408	756 PCI-ISA
+product	AMD PBC756_IDE		0x7409	756 IDE
+product	AMD PBC756_PMC		0x740b	756 Power Mgmt
+product	AMD PBC756_USB		0x740c	756 USB Host
+product	AMD 766_ISA		0x7410	766 PCI-ISA
+product	AMD 766_IDE		0x7411	766 IDE
+product	AMD 766_USB		0x7412	766 USB
+product	AMD 766_PMC		0x7413	766 Power Mgmt
+product	AMD PBC768_ISA		0x7440	768 PCI-ISA
+product	AMD PBC768_IDE		0x7441	768 IDE
+product	AMD PBC768_PMC		0x7443	768 Power Mgmt
+product	AMD PBC768_AC		0x7445	768 AC97 Audio
+product	AMD PBC768_MD		0x7446	768 AC97 Modem
+product	AMD PBC768_PPB		0x7448	768 PCI-PCI
+product	AMD PBC768_USB		0x7449	768 USB
 
 /* AMI */
 product AMI MEGARAID		0x1960	MegaRAID