1 /*
2 * Copyright (c) 2017 Semihalf.
3 * Copyright (c) 2017 Stormshield.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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 AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 #include <sys/stdint.h>
30 #include <sys/stddef.h>
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/bus.h>
35 #include <sys/module.h>
36 #include <sys/sysctl.h>
37 #include <sys/rman.h>
38 #include <sys/unistd.h>
39
40 #include <machine/bus.h>
41 #include <machine/resource.h>
42
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45
46 #include <dev/ahci/ahci.h>
47
48 #define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0
49 #define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4
50
51 #define AHCI_HC_DEVSTR "Marvell AHCI Controller"
52 #define AHCI_HC_VENDOR "Marvell"
53
54 static device_attach_t ahci_mv_fdt_attach;
55
56 static struct ofw_compat_data compatible_data[] = {
57 {"marvell,armada-380-ahci", true},
58 {NULL, false}
59 };
60
61 static void
ahci_mv_regret_config(struct ahci_controller * ctlr)62 ahci_mv_regret_config(struct ahci_controller *ctlr)
63 {
64
65 /*
66 * Enable the regret bit to allow the SATA unit to regret
67 * a request that didn't receive an acknowledge
68 * and a avoid deadlock
69 */
70 ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_ADDR, 0x4);
71 ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_DATA, 0x80);
72 }
73
74 static int
ahci_mv_fdt_probe(device_t dev)75 ahci_mv_fdt_probe(device_t dev)
76 {
77
78 if (!ofw_bus_status_okay(dev))
79 return (ENXIO);
80
81 if (!ofw_bus_search_compatible(dev, compatible_data)->ocd_data)
82 return (ENXIO);
83
84 device_set_desc(dev, AHCI_HC_DEVSTR);
85
86 return (BUS_PROBE_DEFAULT);
87 }
88
89 static int
ahci_mv_fdt_attach(device_t dev)90 ahci_mv_fdt_attach(device_t dev)
91 {
92 struct ahci_controller *ctlr;
93 int rc;
94
95 ctlr = device_get_softc(dev);
96 ctlr->dev = dev;
97 ctlr->r_rid = 0;
98 ctlr->quirks = AHCI_Q_2CH;
99 ctlr->numirqs = 1;
100
101 if (ofw_bus_is_compatible(dev, "marvell,armada-380-ahci"))
102 ctlr->quirks |= AHCI_Q_MRVL_SR_DEL;
103
104 /* Allocate memory for controller */
105 ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
106 &ctlr->r_rid, RF_ACTIVE | RF_SHAREABLE);
107 if (ctlr->r_mem == NULL) {
108 device_printf(dev, "Failed to alloc memory for controller\n");
109 return (ENOMEM);
110 }
111
112 /* Reset controller */
113 rc = ahci_ctlr_reset(dev);
114 if (rc != 0) {
115 device_printf(dev, "Failed to reset controller\n");
116 bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);
117 return (ENXIO);
118 }
119
120 ahci_mv_regret_config(ctlr);
121
122 rc = ahci_attach(dev);
123 if (rc != 0) {
124 device_printf(dev, "Failed to initialize AHCI, with error %d\n", rc);
125 return (ENXIO);
126 }
127
128 return (0);
129 }
130
131 static device_method_t ahci_methods[] = {
132 /* Device interface */
133 DEVMETHOD(device_probe, ahci_mv_fdt_probe),
134 DEVMETHOD(device_attach, ahci_mv_fdt_attach),
135 DEVMETHOD(device_detach, ahci_detach),
136 DEVMETHOD(bus_alloc_resource, ahci_alloc_resource),
137 DEVMETHOD(bus_release_resource, ahci_release_resource),
138 DEVMETHOD(bus_setup_intr, ahci_setup_intr),
139 DEVMETHOD(bus_teardown_intr, ahci_teardown_intr),
140 DEVMETHOD(bus_print_child, ahci_print_child),
141 DEVMETHOD(bus_child_location, ahci_child_location),
142 DEVMETHOD(bus_get_dma_tag, ahci_get_dma_tag),
143 DEVMETHOD_END
144 };
145
146 static driver_t ahci_driver = {
147 "ahci",
148 ahci_methods,
149 sizeof(struct ahci_controller)
150 };
151
152 DRIVER_MODULE(ahci_mv, simplebus, ahci_driver, NULL, NULL);
153 DRIVER_MODULE(ahci_mv, ofwbus, ahci_driver, NULL, NULL);
154