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[FreeBSD/releng/10.0.git] / sys / dev / sdhci / sdhci_fdt.c
1 /*-
2  * Copyright (c) 2012 Thomas Skibo
3  * Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org>
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 ``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 /* Generic driver to attach sdhci controllers on simplebus.
28  * Derived mainly from sdhci_pci.c
29  */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/conf.h>
38 #include <sys/kernel.h>
39 #include <sys/lock.h>
40 #include <sys/module.h>
41 #include <sys/mutex.h>
42 #include <sys/resource.h>
43 #include <sys/rman.h>
44 #include <sys/sysctl.h>
45 #include <sys/taskqueue.h>
46
47 #include <machine/bus.h>
48 #include <machine/resource.h>
49 #include <machine/stdarg.h>
50
51 #include <dev/fdt/fdt_common.h>
52 #include <dev/ofw/ofw_bus.h>
53 #include <dev/ofw/ofw_bus_subr.h>
54
55 #include <dev/mmc/bridge.h>
56 #include <dev/mmc/mmcreg.h>
57 #include <dev/mmc/mmcbrvar.h>
58 #include <dev/sdhci/sdhci.h>
59
60 #include "mmcbr_if.h"
61 #include "sdhci_if.h"
62
63 #define MAX_SLOTS       6
64
65 struct sdhci_fdt_softc {
66         device_t        dev;            /* Controller device */
67         u_int           quirks;         /* Chip specific quirks */
68         u_int           caps;           /* If we override SDHCI_CAPABILITIES */
69         struct resource *irq_res;       /* IRQ resource */
70         void            *intrhand;      /* Interrupt handle */
71
72         int             num_slots;      /* Number of slots on this controller*/
73         struct sdhci_slot slots[MAX_SLOTS];
74         struct resource *mem_res[MAX_SLOTS];    /* Memory resource */
75 };
76
77 static uint8_t
78 sdhci_fdt_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
79 {
80         struct sdhci_fdt_softc *sc = device_get_softc(dev);
81         return (bus_read_1(sc->mem_res[slot->num], off));
82 }
83
84 static void
85 sdhci_fdt_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off,
86                   uint8_t val)
87 {
88         struct sdhci_fdt_softc *sc = device_get_softc(dev);
89         bus_write_1(sc->mem_res[slot->num], off, val);
90 }
91
92 static uint16_t
93 sdhci_fdt_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off)
94 {
95         struct sdhci_fdt_softc *sc = device_get_softc(dev);
96         return (bus_read_2(sc->mem_res[slot->num], off));
97 }
98
99 static void
100 sdhci_fdt_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off,
101                   uint16_t val)
102 {
103         struct sdhci_fdt_softc *sc = device_get_softc(dev);
104         bus_write_2(sc->mem_res[slot->num], off, val);
105 }
106
107 static uint32_t
108 sdhci_fdt_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
109 {
110         struct sdhci_fdt_softc *sc = device_get_softc(dev);
111         return (bus_read_4(sc->mem_res[slot->num], off));
112 }
113
114 static void
115 sdhci_fdt_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
116                   uint32_t val)
117 {
118         struct sdhci_fdt_softc *sc = device_get_softc(dev);
119         bus_write_4(sc->mem_res[slot->num], off, val);
120 }
121
122 static void
123 sdhci_fdt_read_multi_4(device_t dev, struct sdhci_slot *slot,
124     bus_size_t off, uint32_t *data, bus_size_t count)
125 {
126         struct sdhci_fdt_softc *sc = device_get_softc(dev);
127         bus_read_multi_4(sc->mem_res[slot->num], off, data, count);
128 }
129
130 static void
131 sdhci_fdt_write_multi_4(device_t dev, struct sdhci_slot *slot,
132     bus_size_t off, uint32_t *data, bus_size_t count)
133 {
134         struct sdhci_fdt_softc *sc = device_get_softc(dev);
135         bus_write_multi_4(sc->mem_res[slot->num], off, data, count);
136 }
137
138 static void
139 sdhci_fdt_intr(void *arg)
140 {
141         struct sdhci_fdt_softc *sc = (struct sdhci_fdt_softc *)arg;
142         int i;
143
144         for (i = 0; i < sc->num_slots; i++) {
145                 struct sdhci_slot *slot = &sc->slots[i];
146                 sdhci_generic_intr(slot);
147         }
148 }
149
150 static int
151 sdhci_fdt_probe(device_t dev)
152 {
153         struct sdhci_fdt_softc *sc = device_get_softc(dev);
154         phandle_t node;
155         pcell_t cid;
156
157         sc->quirks = 0;
158         sc->num_slots = 1;
159
160         if (ofw_bus_is_compatible(dev, "sdhci_generic")) {
161                 device_set_desc(dev, "generic fdt SDHCI controller");
162         } else if (ofw_bus_is_compatible(dev, "xlnx,zy7_sdhci")) {
163                 sc->quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
164                 device_set_desc(dev, "Zynq-7000 generic fdt SDHCI controller");
165         } else
166                 return (ENXIO);
167
168         node = ofw_bus_get_node(dev);
169
170         /* Allow dts to patch quirks and slots. */
171         if ((OF_getprop(node, "quirks", &cid, sizeof(cid))) > 0)
172                 sc->quirks = fdt32_to_cpu(cid);
173         if ((OF_getprop(node, "num-slots", &cid, sizeof(cid))) > 0)
174                 sc->num_slots = fdt32_to_cpu(cid);
175                 
176         return (0);
177 }
178
179 static int
180 sdhci_fdt_attach(device_t dev)
181 {
182         struct sdhci_fdt_softc *sc = device_get_softc(dev);
183         int err, slots, rid, i;
184         
185         sc->dev = dev;
186
187         /* Allocate IRQ. */
188         rid = 0;
189         sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
190                                              RF_ACTIVE);
191         if (sc->irq_res == NULL) {
192                 device_printf(dev, "Can't allocate IRQ\n");
193                 return (ENOMEM);
194         }
195
196         /* Scan all slots. */
197         slots = sc->num_slots;  /* number of slots determined in probe(). */
198         sc->num_slots = 0;
199         for (i = 0; i < slots; i++) {
200                 struct sdhci_slot *slot = &sc->slots[sc->num_slots];
201
202                 /* Allocate memory. */
203                 rid = 0;
204                 sc->mem_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
205                                                         &rid, RF_ACTIVE);
206                 if (sc->mem_res[i] == NULL) {
207                         device_printf(dev, "Can't allocate memory for "
208                                       "slot %d\n", i);
209                         continue;
210                 }
211
212                 slot->quirks = sc->quirks;
213                 slot->caps = sc->caps;
214
215                 if (sdhci_init_slot(dev, slot, i) != 0)
216                         continue;
217
218                 sc->num_slots++;
219         }
220         device_printf(dev, "%d slot(s) allocated\n", sc->num_slots);
221
222         /* Activate the interrupt */
223         err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
224             NULL, sdhci_fdt_intr, sc, &sc->intrhand);
225         if (err) {
226                 device_printf(dev, "Cannot setup IRQ\n");
227                 return (err);
228         }
229
230         /* Process cards detection. */
231         for (i = 0; i < sc->num_slots; i++) {
232                 struct sdhci_slot *slot = &sc->slots[i];
233                 sdhci_start_slot(slot);
234         }
235                 
236         return (0);
237 }
238
239 static int
240 sdhci_fdt_detach(device_t dev)
241 {
242         struct sdhci_fdt_softc *sc = device_get_softc(dev);
243         int i;
244
245         bus_generic_detach(dev);
246         bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
247         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res),
248                              sc->irq_res);
249
250         for (i = 0; i < sc->num_slots; i++) {
251                 struct sdhci_slot *slot = &sc->slots[i];
252
253                 sdhci_cleanup_slot(slot);
254                 bus_release_resource(dev, SYS_RES_MEMORY,
255                                      rman_get_rid(sc->mem_res[i]),
256                                      sc->mem_res[i]);
257         }
258
259         return (0);
260 }
261
262 static device_method_t sdhci_fdt_methods[] = {
263         /* device_if */
264         DEVMETHOD(device_probe,         sdhci_fdt_probe),
265         DEVMETHOD(device_attach,        sdhci_fdt_attach),
266         DEVMETHOD(device_detach,        sdhci_fdt_detach),
267
268         /* Bus interface */
269         DEVMETHOD(bus_read_ivar,        sdhci_generic_read_ivar),
270         DEVMETHOD(bus_write_ivar,       sdhci_generic_write_ivar),
271
272         /* mmcbr_if */
273         DEVMETHOD(mmcbr_update_ios,     sdhci_generic_update_ios),
274         DEVMETHOD(mmcbr_request,        sdhci_generic_request),
275         DEVMETHOD(mmcbr_get_ro,         sdhci_generic_get_ro),
276         DEVMETHOD(mmcbr_acquire_host,   sdhci_generic_acquire_host),
277         DEVMETHOD(mmcbr_release_host,   sdhci_generic_release_host),
278
279         /* SDHCI registers accessors */
280         DEVMETHOD(sdhci_read_1,         sdhci_fdt_read_1),
281         DEVMETHOD(sdhci_read_2,         sdhci_fdt_read_2),
282         DEVMETHOD(sdhci_read_4,         sdhci_fdt_read_4),
283         DEVMETHOD(sdhci_read_multi_4,   sdhci_fdt_read_multi_4),
284         DEVMETHOD(sdhci_write_1,        sdhci_fdt_write_1),
285         DEVMETHOD(sdhci_write_2,        sdhci_fdt_write_2),
286         DEVMETHOD(sdhci_write_4,        sdhci_fdt_write_4),
287         DEVMETHOD(sdhci_write_multi_4,  sdhci_fdt_write_multi_4),
288
289         DEVMETHOD_END
290 };
291
292 static driver_t sdhci_fdt_driver = {
293         "sdhci_fdt",
294         sdhci_fdt_methods,
295         sizeof(struct sdhci_fdt_softc),
296 };
297 static devclass_t sdhci_fdt_devclass;
298
299 DRIVER_MODULE(sdhci_fdt, simplebus, sdhci_fdt_driver, sdhci_fdt_devclass, 0,0);
300 MODULE_DEPEND(sdhci_fdt, sdhci, 1, 1, 1);