Author: jimharris
Date: Mon Jan 11 17:53:24 2016
New Revision: 293675
URL: https://svnweb.freebsd.org/changeset/base/293675
Log:
MFC r266474:
Add ismt(4) driver.
ismt(4) supports the SMBus Message Transport controller found on Intel
C2000 series (Avoton) and S1200 series (Briarwood) Atom SoCs.
Relnotes: Yes
Added:
stable/10/share/man/man4/ismt.4 (contents, props changed)
stable/10/sys/dev/ismt/
stable/10/sys/dev/ismt/ismt.c (contents, props changed)
stable/10/sys/modules/i2c/controllers/ismt/
stable/10/sys/modules/i2c/controllers/ismt/Makefile (contents, props
changed)
Modified:
stable/10/share/man/man4/Makefile
stable/10/sys/conf/NOTES
stable/10/sys/conf/files
stable/10/sys/modules/i2c/controllers/Makefile
Modified: stable/10/share/man/man4/Makefile
==============================================================================
--- stable/10/share/man/man4/Makefile Mon Jan 11 17:52:42 2016
(r293674)
+++ stable/10/share/man/man4/Makefile Mon Jan 11 17:53:24 2016
(r293675)
@@ -208,6 +208,7 @@ MAN= aac.4 \
ipw.4 \
ipwfw.4 \
isci.4 \
+ ismt.4 \
isp.4 \
ispfw.4 \
iwi.4 \
Added: stable/10/share/man/man4/ismt.4
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/share/man/man4/ismt.4 Mon Jan 11 17:53:24 2016
(r293675)
@@ -0,0 +1,59 @@
+.\"
+.\" Copyright (c) 2014 Intel Corporation
+.\" 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,
+.\" without modification.
+.\" 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. Neither the name of Intel Corporation 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
+.\" "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+.\" A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+.\" HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+.\"
+.\" ismt driver man page.
+.\"
+.\" Author: Jim Harris <jimhar...@freebsd.org>
+.\"
+.\" $FreeBSD$
+.\"
+.Dd May 9, 2014
+.Dt ISMT 4
+.Os
+.Sh NAME
+.Nm ismt
+.Nd Intel SMBus Message Transport (SMBus 2.0) driver
+.Sh SYNOPSIS
+.Cd device pci
+.Cd device smbus
+.Cd device smb
+.Cd device ismt
+.Sh DESCRIPTION
+This driver provides access to the SMBus 2.0 controller device contained
+in the Intel Atom S1200 and C2000 CPUs.
+.Sh SEE ALSO
+.Xr smb 4 ,
+.Xr smbus 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Fx 11.0 .
+.Sh AUTHORS
+.An Jim Harris Aq jimhar...@freebsd.org
Modified: stable/10/sys/conf/NOTES
==============================================================================
--- stable/10/sys/conf/NOTES Mon Jan 11 17:52:42 2016 (r293674)
+++ stable/10/sys/conf/NOTES Mon Jan 11 17:53:24 2016 (r293675)
@@ -2493,6 +2493,7 @@ device sdhci
# amdsmb AMD 8111 SMBus 2.0 Controller
# nfpm NVIDIA nForce Power Management Unit
# nfsmb NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
+# ismt Intel SMBus 2.0 controller chips (on Atom S1200, C2000)
#
device smbus # Bus support, required for smb below.
@@ -2504,6 +2505,7 @@ device amdpm
device amdsmb
device nfpm
device nfsmb
+device ismt
device smb
Modified: stable/10/sys/conf/files
==============================================================================
--- stable/10/sys/conf/files Mon Jan 11 17:52:42 2016 (r293674)
+++ stable/10/sys/conf/files Mon Jan 11 17:53:24 2016 (r293675)
@@ -1523,6 +1523,7 @@ dev/iscsi_initiator/isc_cam.c optional i
dev/iscsi_initiator/isc_soc.c optional iscsi_initiator scbus
dev/iscsi_initiator/isc_sm.c optional iscsi_initiator scbus
dev/iscsi_initiator/isc_subr.c optional iscsi_initiator scbus
+dev/ismt/ismt.c optional ismt
dev/isp/isp.c optional isp
dev/isp/isp_freebsd.c optional isp
dev/isp/isp_library.c optional isp
Added: stable/10/sys/dev/ismt/ismt.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/dev/ismt/ismt.c Mon Jan 11 17:53:24 2016
(r293675)
@@ -0,0 +1,778 @@
+/*-
+ * Copyright (C) 2014 Intel Corporation
+ * 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.
+ * 3. Neither the name of Intel Corporation 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 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/errno.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/priority.h>
+#include <sys/proc.h>
+#include <sys/syslog.h>
+
+#include <machine/bus.h>
+#include <sys/rman.h>
+#include <machine/resource.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/smbus/smbconf.h>
+
+#include "smbus_if.h"
+
+#define ISMT_DESC_ENTRIES 32
+
+/* Hardware Descriptor Constants - Control Field */
+#define ISMT_DESC_CWRL 0x01 /* Command/Write Length */
+#define ISMT_DESC_BLK 0X04 /* Perform Block Transaction */
+#define ISMT_DESC_FAIR 0x08 /* Set fairness flag upon successful arbit. */
+#define ISMT_DESC_PEC 0x10 /* Packet Error Code */
+#define ISMT_DESC_I2C 0x20 /* I2C Enable */
+#define ISMT_DESC_INT 0x40 /* Interrupt */
+#define ISMT_DESC_SOE 0x80 /* Stop On Error */
+
+/* Hardware Descriptor Constants - Status Field */
+#define ISMT_DESC_SCS 0x01 /* Success */
+#define ISMT_DESC_DLTO 0x04 /* Data Low Time Out */
+#define ISMT_DESC_NAK 0x08 /* NAK Received */
+#define ISMT_DESC_CRC 0x10 /* CRC Error */
+#define ISMT_DESC_CLTO 0x20 /* Clock Low Time Out */
+#define ISMT_DESC_COL 0x40 /* Collisions */
+#define ISMT_DESC_LPR 0x80 /* Large Packet Received */
+
+/* Macros */
+#define ISMT_DESC_ADDR_RW(addr, is_read) ((addr) | (is_read))
+
+/* iSMT General Register address offsets (SMBBAR + <addr>) */
+#define ISMT_GR_GCTRL 0x000 /* General Control */
+#define ISMT_GR_SMTICL 0x008 /* SMT Interrupt Cause Location */
+#define ISMT_GR_ERRINTMSK 0x010 /* Error Interrupt Mask */
+#define ISMT_GR_ERRAERMSK 0x014 /* Error AER Mask */
+#define ISMT_GR_ERRSTS 0x018 /* Error Status */
+#define ISMT_GR_ERRINFO 0x01c /* Error Information */
+
+/* iSMT Master Registers */
+#define ISMT_MSTR_MDBA 0x100 /* Master Descriptor Base Address */
+#define ISMT_MSTR_MCTRL 0x108 /* Master Control */
+#define ISMT_MSTR_MSTS 0x10c /* Master Status */
+#define ISMT_MSTR_MDS 0x110 /* Master Descriptor Size */
+#define ISMT_MSTR_RPOLICY 0x114 /* Retry Policy */
+
+/* iSMT Miscellaneous Registers */
+#define ISMT_SPGT 0x300 /* SMBus PHY Global Timing */
+
+/* General Control Register (GCTRL) bit definitions */
+#define ISMT_GCTRL_TRST 0x04 /* Target Reset */
+#define ISMT_GCTRL_KILL 0x08 /* Kill */
+#define ISMT_GCTRL_SRST 0x40 /* Soft Reset */
+
+/* Master Control Register (MCTRL) bit definitions */
+#define ISMT_MCTRL_SS 0x01 /* Start/Stop */
+#define ISMT_MCTRL_MEIE 0x10 /* Master Error Interrupt
Enable */
+#define ISMT_MCTRL_FMHP 0x00ff0000 /* Firmware Master Head Ptr
(FMHP) */
+
+/* Master Status Register (MSTS) bit definitions */
+#define ISMT_MSTS_HMTP 0xff0000 /* HW Master Tail Pointer (HMTP) */
+#define ISMT_MSTS_MIS 0x20 /* Master Interrupt Status (MIS) */
+#define ISMT_MSTS_MEIS 0x10 /* Master Error Int Status (MEIS) */
+#define ISMT_MSTS_IP 0x01 /* In Progress */
+
+/* Master Descriptor Size (MDS) bit definitions */
+#define ISMT_MDS_MASK 0xff /* Master Descriptor Size mask (MDS) */
+
+/* SMBus PHY Global Timing Register (SPGT) bit definitions */
+#define ISMT_SPGT_SPD_MASK 0xc0000000 /* SMBus Speed mask */
+#define ISMT_SPGT_SPD_80K 0x00 /* 80 kHz */
+#define ISMT_SPGT_SPD_100K (0x1 << 30) /* 100 kHz */
+#define ISMT_SPGT_SPD_400K (0x2 << 30) /* 400 kHz */
+#define ISMT_SPGT_SPD_1M (0x3 << 30) /* 1 MHz */
+
+/* MSI Control Register (MSICTL) bit definitions */
+#define ISMT_MSICTL_MSIE 0x01 /* MSI Enable */
+
+#define ISMT_MAX_BLOCK_SIZE 32 /* per SMBus spec */
+
+//#define ISMT_DEBUG device_printf
+#ifndef ISMT_DEBUG
+#define ISMT_DEBUG(...)
+#endif
+
+/* iSMT Hardware Descriptor */
+struct ismt_desc {
+ uint8_t tgtaddr_rw; /* target address & r/w bit */
+ uint8_t wr_len_cmd; /* write length in bytes or a command */
+ uint8_t rd_len; /* read length */
+ uint8_t control; /* control bits */
+ uint8_t status; /* status bits */
+ uint8_t retry; /* collision retry and retry count */
+ uint8_t rxbytes; /* received bytes */
+ uint8_t txbytes; /* transmitted bytes */
+ uint32_t dptr_low; /* lower 32 bit of the data pointer */
+ uint32_t dptr_high; /* upper 32 bit of the data pointer */
+} __packed;
+
+#define DESC_SIZE (ISMT_DESC_ENTRIES * sizeof(struct ismt_desc))
+
+#define DMA_BUFFER_SIZE 64
+
+struct ismt_softc {
+ device_t pcidev;
+ device_t smbdev;
+
+ struct thread *bus_reserved;
+
+ int intr_rid;
+ struct resource *intr_res;
+ void *intr_handle;
+
+ bus_space_tag_t mmio_tag;
+ bus_space_handle_t mmio_handle;
+ int mmio_rid;
+ struct resource *mmio_res;
+
+ uint8_t head;
+
+ struct ismt_desc *desc;
+ bus_dma_tag_t desc_dma_tag;
+ bus_dmamap_t desc_dma_map;
+ uint64_t desc_bus_addr;
+
+ uint8_t *dma_buffer;
+ bus_dma_tag_t dma_buffer_dma_tag;
+ bus_dmamap_t dma_buffer_dma_map;
+ uint64_t dma_buffer_bus_addr;
+
+ uint8_t using_msi;
+};
+
+static void
+ismt_intr(void *arg)
+{
+ struct ismt_softc *sc = arg;
+ uint32_t val;
+
+ val = bus_read_4(sc->mmio_res, ISMT_MSTR_MSTS);
+ ISMT_DEBUG(sc->pcidev, "%s MSTS=0x%x\n", __func__, val);
+
+ val |= (ISMT_MSTS_MIS | ISMT_MSTS_MEIS);
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MSTS, val);
+
+ wakeup(sc);
+}
+
+static int
+ismt_callback(device_t dev, int index, void *data)
+{
+ struct ismt_softc *sc;
+ int acquired, err;
+
+ sc = device_get_softc(dev);
+
+ switch (index) {
+ case SMB_REQUEST_BUS:
+ acquired = atomic_cmpset_ptr(
+ (uintptr_t *)&sc->bus_reserved,
+ (uintptr_t)NULL, (uintptr_t)curthread);
+ ISMT_DEBUG(dev, "SMB_REQUEST_BUS acquired=%d\n", acquired);
+ if (acquired)
+ err = 0;
+ else
+ err = EWOULDBLOCK;
+ break;
+ case SMB_RELEASE_BUS:
+ KASSERT(sc->bus_reserved == curthread,
+ ("SMB_RELEASE_BUS called by wrong thread\n"));
+ ISMT_DEBUG(dev, "SMB_RELEASE_BUS\n");
+ atomic_store_rel_ptr((uintptr_t *)&sc->bus_reserved,
+ (uintptr_t)NULL);
+ err = 0;
+ break;
+ default:
+ err = SMB_EABORT;
+ break;
+ }
+
+ return (err);
+}
+
+static struct ismt_desc *
+ismt_alloc_desc(struct ismt_softc *sc)
+{
+ struct ismt_desc *desc;
+
+ KASSERT(sc->bus_reserved == curthread,
+ ("curthread %p did not request bus (%p has reserved)\n",
+ curthread, sc->bus_reserved));
+
+ desc = &sc->desc[sc->head++];
+ if (sc->head == ISMT_DESC_ENTRIES)
+ sc->head = 0;
+
+ memset(desc, 0, sizeof(*desc));
+
+ return (desc);
+}
+
+static int
+ismt_submit(struct ismt_softc *sc, struct ismt_desc *desc, uint8_t slave,
+ uint8_t is_read)
+{
+ uint32_t err, fmhp, val;
+
+ desc->control |= ISMT_DESC_FAIR;
+ if (sc->using_msi)
+ desc->control |= ISMT_DESC_INT;
+
+ desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(slave, is_read);
+ desc->dptr_low = (sc->dma_buffer_bus_addr & 0xFFFFFFFFLL);
+ desc->dptr_high = (sc->dma_buffer_bus_addr >> 32);
+
+ wmb();
+
+ fmhp = sc->head << 16;
+ val = bus_read_4(sc->mmio_res, ISMT_MSTR_MCTRL);
+ val &= ~ISMT_MCTRL_FMHP;
+ val |= fmhp;
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MCTRL, val);
+
+ /* set the start bit */
+ val = bus_read_4(sc->mmio_res, ISMT_MSTR_MCTRL);
+ val |= ISMT_MCTRL_SS;
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MCTRL, val);
+
+ err = tsleep(sc, PWAIT, "ismt_wait", 5 * hz);
+
+ if (err != 0) {
+ ISMT_DEBUG(sc->pcidev, "%s timeout\n", __func__);
+ return (SMB_ETIMEOUT);
+ }
+
+ ISMT_DEBUG(sc->pcidev, "%s status=0x%x\n", __func__, desc->status);
+
+ if (desc->status & ISMT_DESC_SCS)
+ return (SMB_ENOERR);
+
+ if (desc->status & ISMT_DESC_NAK)
+ return (SMB_ENOACK);
+
+ if (desc->status & ISMT_DESC_CRC)
+ return (SMB_EBUSERR);
+
+ if (desc->status & ISMT_DESC_COL)
+ return (SMB_ECOLLI);
+
+ if (desc->status & ISMT_DESC_LPR)
+ return (SMB_EINVAL);
+
+ if (desc->status & (ISMT_DESC_DLTO | ISMT_DESC_CLTO))
+ return (SMB_ETIMEOUT);
+
+ return (SMB_EBUSERR);
+}
+
+
+static int
+ismt_quick(device_t dev, u_char slave, int how)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+ int is_read;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ if (how != SMB_QREAD && how != SMB_QWRITE) {
+ return (SMB_ENOTSUPP);
+ }
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ is_read = (how == SMB_QREAD ? 1 : 0);
+ return (ismt_submit(sc, desc, slave, is_read));
+}
+
+static int
+ismt_sendb(device_t dev, u_char slave, char byte)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->control = ISMT_DESC_CWRL;
+ desc->wr_len_cmd = byte;
+
+ return (ismt_submit(sc, desc, slave, 0));
+}
+
+static int
+ismt_recvb(device_t dev, u_char slave, char *byte)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+ int err;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->rd_len = 1;
+
+ err = ismt_submit(sc, desc, slave, 1);
+
+ if (err != SMB_ENOERR)
+ return (err);
+
+ *byte = sc->dma_buffer[0];
+
+ return (err);
+}
+
+static int
+ismt_writeb(device_t dev, u_char slave, char cmd, char byte)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->wr_len_cmd = 2;
+ sc->dma_buffer[0] = cmd;
+ sc->dma_buffer[1] = byte;
+
+ return (ismt_submit(sc, desc, slave, 0));
+}
+
+static int
+ismt_writew(device_t dev, u_char slave, char cmd, short word)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->wr_len_cmd = 3;
+ sc->dma_buffer[0] = cmd;
+ sc->dma_buffer[1] = word & 0xFF;
+ sc->dma_buffer[2] = word >> 8;
+
+ return (ismt_submit(sc, desc, slave, 0));
+}
+
+static int
+ismt_readb(device_t dev, u_char slave, char cmd, char *byte)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+ int err;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->control = ISMT_DESC_CWRL;
+ desc->wr_len_cmd = cmd;
+ desc->rd_len = 1;
+
+ err = ismt_submit(sc, desc, slave, 1);
+
+ if (err != SMB_ENOERR)
+ return (err);
+
+ *byte = sc->dma_buffer[0];
+
+ return (err);
+}
+
+static int
+ismt_readw(device_t dev, u_char slave, char cmd, short *word)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+ int err;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->control = ISMT_DESC_CWRL;
+ desc->wr_len_cmd = cmd;
+ desc->rd_len = 2;
+
+ err = ismt_submit(sc, desc, slave, 1);
+
+ if (err != SMB_ENOERR)
+ return (err);
+
+ *word = sc->dma_buffer[0] | (sc->dma_buffer[1] << 8);
+
+ return (err);
+}
+
+static int
+ismt_pcall(device_t dev, u_char slave, char cmd, short sdata, short *rdata)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+ int err;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->wr_len_cmd = 3;
+ desc->rd_len = 2;
+ sc->dma_buffer[0] = cmd;
+ sc->dma_buffer[1] = sdata & 0xff;
+ sc->dma_buffer[2] = sdata >> 8;
+
+ err = ismt_submit(sc, desc, slave, 0);
+
+ if (err != SMB_ENOERR)
+ return (err);
+
+ *rdata = sc->dma_buffer[0] | (sc->dma_buffer[1] << 8);
+
+ return (err);
+}
+
+static int
+ismt_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ if (count == 0 || count > ISMT_MAX_BLOCK_SIZE)
+ return (SMB_EINVAL);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->control = ISMT_DESC_I2C;
+ desc->wr_len_cmd = count + 1;
+ sc->dma_buffer[0] = cmd;
+ memcpy(&sc->dma_buffer[1], buf, count);
+
+ return (ismt_submit(sc, desc, slave, 0));
+}
+
+static int
+ismt_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)
+{
+ struct ismt_desc *desc;
+ struct ismt_softc *sc;
+ int err;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+
+ if (*count == 0 || *count > ISMT_MAX_BLOCK_SIZE)
+ return (SMB_EINVAL);
+
+ sc = device_get_softc(dev);
+ desc = ismt_alloc_desc(sc);
+ desc->control = ISMT_DESC_I2C | ISMT_DESC_CWRL;
+ desc->wr_len_cmd = cmd;
+ desc->rd_len = *count;
+
+ err = ismt_submit(sc, desc, slave, 0);
+
+ if (err != SMB_ENOERR)
+ return (err);
+
+ memcpy(buf, sc->dma_buffer, desc->rxbytes);
+ *count = desc->rxbytes;
+
+ return (err);
+}
+
+static int
+ismt_detach(device_t dev)
+{
+ struct ismt_softc *sc;
+ int error;
+
+ ISMT_DEBUG(dev, "%s\n", __func__);
+ sc = device_get_softc(dev);
+
+ error = bus_generic_detach(dev);
+ if (error)
+ return (error);
+
+ device_delete_child(dev, sc->smbdev);
+
+ if (sc->intr_handle != NULL) {
+ bus_teardown_intr(dev, sc->intr_res, sc->intr_handle);
+ sc->intr_handle = NULL;
+ }
+ if (sc->intr_res != NULL) {
+ bus_release_resource(dev,
+ SYS_RES_IRQ, sc->intr_rid, sc->intr_res);
+ sc->intr_res = NULL;
+ }
+ if (sc->using_msi == 1)
+ pci_release_msi(dev);
+
+ if (sc->mmio_res != NULL) {
+ bus_release_resource(dev,
+ SYS_RES_MEMORY, sc->mmio_rid, sc->mmio_res);
+ sc->mmio_res = NULL;
+ }
+
+ bus_dmamap_unload(sc->desc_dma_tag, sc->desc_dma_map);
+ bus_dmamap_unload(sc->dma_buffer_dma_tag, sc->dma_buffer_dma_map);
+
+ bus_dmamem_free(sc->desc_dma_tag, sc->desc,
+ sc->desc_dma_map);
+ bus_dmamem_free(sc->dma_buffer_dma_tag, sc->dma_buffer,
+ sc->dma_buffer_dma_map);
+
+ bus_dma_tag_destroy(sc->desc_dma_tag);
+ bus_dma_tag_destroy(sc->dma_buffer_dma_tag);
+
+ pci_disable_busmaster(dev);
+
+ return 0;
+}
+
+static void
+ismt_single_map(void *arg, bus_dma_segment_t *seg, int nseg, int error)
+{
+ uint64_t *bus_addr = (uint64_t *)arg;
+
+ KASSERT(error == 0, ("%s: error=%d\n", __func__, error));
+ KASSERT(nseg == 1, ("%s: nseg=%d\n", __func__, nseg));
+
+ *bus_addr = seg[0].ds_addr;
+}
+
+static int
+ismt_attach(device_t dev)
+{
+ struct ismt_softc *sc = device_get_softc(dev);
+ int err, num_vectors, val;
+
+ sc->pcidev = dev;
+ pci_enable_busmaster(dev);
+
+ if ((sc->smbdev = device_add_child(dev, "smbus", -1)) == NULL) {
+ device_printf(dev, "no smbus child found\n");
+ err = ENXIO;
+ goto fail;
+ }
+
+ sc->mmio_rid = PCIR_BAR(0);
+ sc->mmio_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &sc->mmio_rid, RF_ACTIVE);
+ if (sc->mmio_res == NULL) {
+ device_printf(dev, "cannot allocate mmio region\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ sc->mmio_tag = rman_get_bustag(sc->mmio_res);
+ sc->mmio_handle = rman_get_bushandle(sc->mmio_res);
+
+ /* Attach "smbus" child */
+ if ((err = bus_generic_attach(dev)) != 0) {
+ device_printf(dev, "failed to attach child: %d\n", err);
+ err = ENXIO;
+ goto fail;
+ }
+
+ bus_dma_tag_create(bus_get_dma_tag(dev), 4, PAGE_SIZE,
+ BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+ DESC_SIZE, 1, DESC_SIZE,
+ 0, NULL, NULL, &sc->desc_dma_tag);
+
+ bus_dma_tag_create(bus_get_dma_tag(dev), 4, PAGE_SIZE,
+ BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+ DMA_BUFFER_SIZE, 1, DMA_BUFFER_SIZE,
+ 0, NULL, NULL, &sc->dma_buffer_dma_tag);
+
+ bus_dmamap_create(sc->desc_dma_tag, 0,
+ &sc->desc_dma_map);
+ bus_dmamap_create(sc->dma_buffer_dma_tag, 0,
+ &sc->dma_buffer_dma_map);
+
+ bus_dmamem_alloc(sc->desc_dma_tag,
+ (void **)&sc->desc, BUS_DMA_WAITOK,
+ &sc->desc_dma_map);
+ bus_dmamem_alloc(sc->dma_buffer_dma_tag,
+ (void **)&sc->dma_buffer, BUS_DMA_WAITOK,
+ &sc->dma_buffer_dma_map);
+
+ bus_dmamap_load(sc->desc_dma_tag,
+ sc->desc_dma_map, sc->desc, DESC_SIZE,
+ ismt_single_map, &sc->desc_bus_addr, 0);
+ bus_dmamap_load(sc->dma_buffer_dma_tag,
+ sc->dma_buffer_dma_map, sc->dma_buffer, DMA_BUFFER_SIZE,
+ ismt_single_map, &sc->dma_buffer_bus_addr, 0);
+
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MDBA,
+ (sc->desc_bus_addr & 0xFFFFFFFFLL));
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MDBA + 4,
+ (sc->desc_bus_addr >> 32));
+
+ /* initialize the Master Control Register (MCTRL) */
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MCTRL, ISMT_MCTRL_MEIE);
+
+ /* initialize the Master Status Register (MSTS) */
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MSTS, 0);
+
+ /* initialize the Master Descriptor Size (MDS) */
+ val = bus_read_4(sc->mmio_res, ISMT_MSTR_MDS);
+ val &= ~ISMT_MDS_MASK;
+ val |= (ISMT_DESC_ENTRIES - 1);
+ bus_write_4(sc->mmio_res, ISMT_MSTR_MDS, val);
+
+ sc->using_msi = 1;
+
+ if (pci_msi_count(dev) == 0) {
+ sc->using_msi = 0;
+ goto intx;
+ }
+
+ num_vectors = 1;
+ if (pci_alloc_msi(dev, &num_vectors) != 0) {
+ sc->using_msi = 0;
+ goto intx;
+ }
+
+ sc->intr_rid = 1;
+ sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
+ &sc->intr_rid, RF_ACTIVE);
+
+ if (sc->intr_res == NULL) {
+ sc->using_msi = 0;
+ pci_release_msi(dev);
+ }
+
+intx:
+ if (sc->using_msi == 0) {
+ sc->intr_rid = 0;
+ sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
+ &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);
+ if (sc->intr_res == NULL) {
+ device_printf(dev, "cannot allocate irq\n");
+ err = ENXIO;
+ goto fail;
+ }
+ }
+
+ ISMT_DEBUG(dev, "using_msi = %d\n", sc->using_msi);
+
+ err = bus_setup_intr(dev, sc->intr_res,
+ INTR_TYPE_MISC | INTR_MPSAFE, NULL, ismt_intr, sc,
+ &sc->intr_handle);
+ if (err != 0) {
+ device_printf(dev, "cannot setup interrupt\n");
+ err = ENXIO;
+ goto fail;
+ }
+
+ return (0);
+
+fail:
+ ismt_detach(dev);
+ return (err);
+}
+
+#define ID_INTEL_S1200_SMT0 0x0c598086
+#define ID_INTEL_S1200_SMT1 0x0c5a8086
+#define ID_INTEL_C2000_SMT 0x1f158086
+
+static int
+ismt_probe(device_t dev)
+{
+ const char *desc;
+
+ switch (pci_get_devid(dev)) {
+ case ID_INTEL_S1200_SMT0:
+ desc = "Atom Processor S1200 SMBus 2.0 Controller 0";
+ break;
+ case ID_INTEL_S1200_SMT1:
+ desc = "Atom Processor S1200 SMBus 2.0 Controller 1";
+ break;
+ case ID_INTEL_C2000_SMT:
+ desc = "Atom Processor C2000 SMBus 2.0";
+ break;
+ default:
+ return (ENXIO);
+ }
+
+ device_set_desc(dev, desc);
+ return (BUS_PROBE_DEFAULT);
+}
+
+/* Device methods */
+static device_method_t ismt_pci_methods[] = {
+ DEVMETHOD(device_probe, ismt_probe),
+ DEVMETHOD(device_attach, ismt_attach),
+ DEVMETHOD(device_detach, ismt_detach),
+
+ DEVMETHOD(smbus_callback, ismt_callback),
+ DEVMETHOD(smbus_quick, ismt_quick),
+ DEVMETHOD(smbus_sendb, ismt_sendb),
+ DEVMETHOD(smbus_recvb, ismt_recvb),
+ DEVMETHOD(smbus_writeb, ismt_writeb),
+ DEVMETHOD(smbus_writew, ismt_writew),
+ DEVMETHOD(smbus_readb, ismt_readb),
+ DEVMETHOD(smbus_readw, ismt_readw),
+ DEVMETHOD(smbus_pcall, ismt_pcall),
+ DEVMETHOD(smbus_bwrite, ismt_bwrite),
+ DEVMETHOD(smbus_bread, ismt_bread),
+
+ DEVMETHOD_END
+};
+
+static driver_t ismt_pci_driver = {
+ "ismt",
+ ismt_pci_methods,
+ sizeof(struct ismt_softc)
+};
+
+static devclass_t ismt_pci_devclass;
+
+DRIVER_MODULE(ismt, pci, ismt_pci_driver, ismt_pci_devclass, 0, 0);
+DRIVER_MODULE(smbus, ismt, smbus_driver, smbus_devclass, 0, 0);
+
+MODULE_DEPEND(ismt, pci, 1, 1, 1);
+MODULE_DEPEND(ismt, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
+MODULE_VERSION(ismt, 1);
Modified: stable/10/sys/modules/i2c/controllers/Makefile
==============================================================================
--- stable/10/sys/modules/i2c/controllers/Makefile Mon Jan 11 17:52:42
2016 (r293674)
+++ stable/10/sys/modules/i2c/controllers/Makefile Mon Jan 11 17:53:24
2016 (r293675)
@@ -3,7 +3,7 @@
.if ${MACHINE} == "pc98"
SUBDIR = lpbb
.else
-SUBDIR = alpm amdpm amdsmb ichsmb intpm nfsmb viapm lpbb pcf
+SUBDIR = alpm amdpm amdsmb ichsmb intpm ismt nfsmb viapm lpbb pcf
.endif
.include <bsd.subdir.mk>
Added: stable/10/sys/modules/i2c/controllers/ismt/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/modules/i2c/controllers/ismt/Makefile Mon Jan 11 17:53:24
2016 (r293675)
@@ -0,0 +1,8 @@
+#$FreeBSD$
+
+.PATH: ${.CURDIR}/../../../../dev/ismt
+KMOD = ismt
+SRCS = device_if.h bus_if.h iicbb_if.h pci_if.h smbus_if.h \
+ ismt.c
+
+.include <bsd.kmod.mk>
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