xref: /freebsd/sys/dev/ata/chipsets/ata-cypress.c (revision 63d1fd5970ec814904aa0f4580b10a0d302d08b2)
1 /*-
2  * Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer,
10  *    without modification, immediately at the beginning of the file.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <sys/param.h>
31 #include <sys/module.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/ata.h>
35 #include <sys/bus.h>
36 #include <sys/endian.h>
37 #include <sys/malloc.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <sys/sema.h>
41 #include <sys/taskqueue.h>
42 #include <vm/uma.h>
43 #include <machine/stdarg.h>
44 #include <machine/resource.h>
45 #include <machine/bus.h>
46 #include <sys/rman.h>
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/pcireg.h>
49 #include <dev/ata/ata-all.h>
50 #include <dev/ata/ata-pci.h>
51 #include <ata_if.h>
52 
53 /* local prototypes */
54 static int ata_cypress_chipinit(device_t dev);
55 static int ata_cypress_setmode(device_t dev, int target, int mode);
56 
57 
58 /*
59  * Cypress chipset support functions
60  */
61 static int
62 ata_cypress_probe(device_t dev)
63 {
64     struct ata_pci_controller *ctlr = device_get_softc(dev);
65 
66     /*
67      * the Cypress chip is a mess, it contains two ATA functions, but
68      * both channels are visible on the first one.
69      * simply ignore the second function for now, as the right
70      * solution (ignoring the second channel on the first function)
71      * doesn't work with the crappy ATA interrupt setup on the alpha.
72      */
73     if (pci_get_devid(dev) == ATA_CYPRESS_82C693 &&
74 	pci_get_function(dev) == 1 &&
75 	pci_get_subclass(dev) == PCIS_STORAGE_IDE) {
76 	device_set_desc(dev, "Cypress 82C693 ATA controller");
77 	ctlr->chipinit = ata_cypress_chipinit;
78 	return (BUS_PROBE_LOW_PRIORITY);
79     }
80     return ENXIO;
81 }
82 
83 static int
84 ata_cypress_chipinit(device_t dev)
85 {
86     struct ata_pci_controller *ctlr = device_get_softc(dev);
87 
88     if (ata_setup_interrupt(dev, ata_generic_intr))
89 	return ENXIO;
90 
91     ctlr->setmode = ata_cypress_setmode;
92     return 0;
93 }
94 
95 static int
96 ata_cypress_setmode(device_t dev, int target, int mode)
97 {
98 	device_t parent = device_get_parent(dev);
99 	struct ata_channel *ch = device_get_softc(dev);
100 
101 	mode = min(mode, ATA_WDMA2);
102 
103 	/* XXX SOS missing WDMA0+1 + PIO modes */
104 	if (mode == ATA_WDMA2) {
105 		pci_write_config(parent, ch->unit ? 0x4e : 0x4c, 0x2020, 2);
106 	}
107 	/* we could set PIO mode timings, but we assume the BIOS did that */
108 	return (mode);
109 }
110 
111 ATA_DECLARE_DRIVER(ata_cypress);
112