2 * Copyright (c) 2014 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com> and was subsequently ported
6 * to FreeBSD by Michael Gmelin <freebsd@grem.de>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
40 * Intel fourth generation mobile cpus integrated I2C device.
42 * See ig4_reg.h for datasheet reference and notes.
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/module.h>
49 #include <sys/errno.h>
51 #include <sys/mutex.h>
53 #include <sys/syslog.h>
56 #include <machine/bus.h>
58 #include <machine/resource.h>
60 #include <dev/pci/pcivar.h>
61 #include <dev/pci/pcireg.h>
62 #include <dev/iicbus/iiconf.h>
64 #include <dev/ichiic/ig4_reg.h>
65 #include <dev/ichiic/ig4_var.h>
67 static int ig4iic_pci_detach(device_t dev);
69 #define PCI_CHIP_LYNXPT_LP_I2C_1 0x9c618086
70 #define PCI_CHIP_LYNXPT_LP_I2C_2 0x9c628086
71 #define PCI_CHIP_BRASWELL_I2C_1 0x22c18086
72 #define PCI_CHIP_BRASWELL_I2C_2 0x22c28086
73 #define PCI_CHIP_BRASWELL_I2C_3 0x22c38086
74 #define PCI_CHIP_BRASWELL_I2C_5 0x22c58086
75 #define PCI_CHIP_BRASWELL_I2C_6 0x22c68086
76 #define PCI_CHIP_BRASWELL_I2C_7 0x22c78086
79 ig4iic_pci_probe(device_t dev)
81 switch(pci_get_devid(dev)) {
82 case PCI_CHIP_LYNXPT_LP_I2C_1:
83 device_set_desc(dev, "Intel Lynx Point-LP I2C Controller-1");
85 case PCI_CHIP_LYNXPT_LP_I2C_2:
86 device_set_desc(dev, "Intel Lynx Point-LP I2C Controller-2");
88 case PCI_CHIP_BRASWELL_I2C_1:
89 device_set_desc(dev, "Intel Braswell Serial I/O I2C Port 1");
91 case PCI_CHIP_BRASWELL_I2C_2:
92 device_set_desc(dev, "Intel Braswell Serial I/O I2C Port 2");
94 case PCI_CHIP_BRASWELL_I2C_3:
95 device_set_desc(dev, "Intel Braswell Serial I/O I2C Port 3");
97 case PCI_CHIP_BRASWELL_I2C_5:
98 device_set_desc(dev, "Intel Braswell Serial I/O I2C Port 5");
100 case PCI_CHIP_BRASWELL_I2C_6:
101 device_set_desc(dev, "Intel Braswell Serial I/O I2C Port 6");
103 case PCI_CHIP_BRASWELL_I2C_7:
104 device_set_desc(dev, "Intel Braswell Serial I/O I2C Port 7");
109 return (BUS_PROBE_DEFAULT);
113 ig4iic_pci_attach(device_t dev)
115 ig4iic_softc_t *sc = device_get_softc(dev);
119 sc->regs_rid = PCIR_BAR(0);
120 sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
121 &sc->regs_rid, RF_ACTIVE);
122 if (sc->regs_res == NULL) {
123 device_printf(dev, "unable to map registers\n");
124 ig4iic_pci_detach(dev);
128 if (pci_alloc_msi(dev, &sc->intr_rid)) {
129 device_printf(dev, "Using MSI\n");
131 sc->intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
132 &sc->intr_rid, RF_SHAREABLE | RF_ACTIVE);
133 if (sc->intr_res == NULL) {
134 device_printf(dev, "unable to map interrupt\n");
135 ig4iic_pci_detach(dev);
138 sc->platform_attached = 1;
140 error = ig4iic_attach(sc);
142 ig4iic_pci_detach(dev);
148 ig4iic_pci_detach(device_t dev)
150 ig4iic_softc_t *sc = device_get_softc(dev);
153 if (sc->platform_attached) {
154 error = ig4iic_detach(sc);
157 sc->platform_attached = 0;
161 bus_release_resource(dev, SYS_RES_IRQ,
162 sc->intr_rid, sc->intr_res);
165 if (sc->intr_rid != 0)
166 pci_release_msi(dev);
168 bus_release_resource(dev, SYS_RES_MEMORY,
169 sc->regs_rid, sc->regs_res);
176 static device_method_t ig4iic_pci_methods[] = {
177 /* Device interface */
178 DEVMETHOD(device_probe, ig4iic_pci_probe),
179 DEVMETHOD(device_attach, ig4iic_pci_attach),
180 DEVMETHOD(device_detach, ig4iic_pci_detach),
182 DEVMETHOD(iicbus_transfer, ig4iic_transfer),
183 DEVMETHOD(iicbus_reset, ig4iic_reset),
184 DEVMETHOD(iicbus_callback, iicbus_null_callback),
189 static driver_t ig4iic_pci_driver = {
192 sizeof(struct ig4iic_softc)
195 static devclass_t ig4iic_pci_devclass;
197 DRIVER_MODULE_ORDERED(ig4iic_pci, pci, ig4iic_pci_driver, ig4iic_pci_devclass, 0, 0,
199 MODULE_DEPEND(ig4iic_pci, pci, 1, 1, 1);
200 MODULE_DEPEND(ig4iic_pci, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
201 MODULE_VERSION(ig4iic_pci, 1);