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[FreeBSD/stable/10.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/kernel.h>
38 #include <sys/lock.h>
39 #include <sys/module.h>
40 #include <sys/mutex.h>
41 #include <sys/resource.h>
42 #include <sys/rman.h>
43 #include <sys/sysctl.h>
44 #include <sys/taskqueue.h>
45
46 #include <machine/bus.h>
47 #include <machine/resource.h>
48
49 #include <dev/fdt/fdt_common.h>
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/ofw_bus_subr.h>
52
53 #include <dev/mmc/bridge.h>
54
55 #include <dev/sdhci/sdhci.h>
56
57 #include "mmcbr_if.h"
58 #include "sdhci_if.h"
59
60 #define MAX_SLOTS       6
61
62 struct sdhci_fdt_softc {
63         device_t        dev;            /* Controller device */
64         u_int           quirks;         /* Chip specific quirks */
65         u_int           caps;           /* If we override SDHCI_CAPABILITIES */
66         uint32_t        max_clk;        /* Max possible freq */
67         struct resource *irq_res;       /* IRQ resource */
68         void            *intrhand;      /* Interrupt handle */
69
70         int             num_slots;      /* Number of slots on this controller*/
71         struct sdhci_slot slots[MAX_SLOTS];
72         struct resource *mem_res[MAX_SLOTS];    /* Memory resource */
73 };
74
75 static uint8_t
76 sdhci_fdt_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
77 {
78         struct sdhci_fdt_softc *sc = device_get_softc(dev);
79
80         return (bus_read_1(sc->mem_res[slot->num], off));
81 }
82
83 static void
84 sdhci_fdt_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off,
85     uint8_t val)
86 {
87         struct sdhci_fdt_softc *sc = device_get_softc(dev);
88
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
97         return (bus_read_2(sc->mem_res[slot->num], off));
98 }
99
100 static void
101 sdhci_fdt_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off,
102     uint16_t val)
103 {
104         struct sdhci_fdt_softc *sc = device_get_softc(dev);
105
106         bus_write_2(sc->mem_res[slot->num], off, val);
107 }
108
109 static uint32_t
110 sdhci_fdt_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
111 {
112         struct sdhci_fdt_softc *sc = device_get_softc(dev);
113
114         return (bus_read_4(sc->mem_res[slot->num], off));
115 }
116
117 static void
118 sdhci_fdt_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
119     uint32_t val)
120 {
121         struct sdhci_fdt_softc *sc = device_get_softc(dev);
122
123         bus_write_4(sc->mem_res[slot->num], off, val);
124 }
125
126 static void
127 sdhci_fdt_read_multi_4(device_t dev, struct sdhci_slot *slot,
128     bus_size_t off, uint32_t *data, bus_size_t count)
129 {
130         struct sdhci_fdt_softc *sc = device_get_softc(dev);
131
132         bus_read_multi_4(sc->mem_res[slot->num], off, data, count);
133 }
134
135 static void
136 sdhci_fdt_write_multi_4(device_t dev, struct sdhci_slot *slot,
137     bus_size_t off, uint32_t *data, bus_size_t count)
138 {
139         struct sdhci_fdt_softc *sc = device_get_softc(dev);
140
141         bus_write_multi_4(sc->mem_res[slot->num], off, data, count);
142 }
143
144 static void
145 sdhci_fdt_intr(void *arg)
146 {
147         struct sdhci_fdt_softc *sc = (struct sdhci_fdt_softc *)arg;
148         int i;
149
150         for (i = 0; i < sc->num_slots; i++)
151                 sdhci_generic_intr(&sc->slots[i]);
152 }
153
154 static int
155 sdhci_fdt_probe(device_t dev)
156 {
157         struct sdhci_fdt_softc *sc = device_get_softc(dev);
158         phandle_t node;
159         pcell_t cid;
160
161         sc->quirks = 0;
162         sc->num_slots = 1;
163         sc->max_clk = 0;
164
165         if (!ofw_bus_status_okay(dev))
166                 return (ENXIO);
167
168         if (ofw_bus_is_compatible(dev, "sdhci_generic")) {
169                 device_set_desc(dev, "generic fdt SDHCI controller");
170         } else if (ofw_bus_is_compatible(dev, "xlnx,zy7_sdhci")) {
171                 sc->quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
172                 device_set_desc(dev, "Zynq-7000 generic fdt SDHCI controller");
173         } else
174                 return (ENXIO);
175
176         node = ofw_bus_get_node(dev);
177
178         /* Allow dts to patch quirks, slots, and max-frequency. */
179         if ((OF_getencprop(node, "quirks", &cid, sizeof(cid))) > 0)
180                 sc->quirks = cid;
181         if ((OF_getencprop(node, "num-slots", &cid, sizeof(cid))) > 0)
182                 sc->num_slots = cid;
183         if ((OF_getencprop(node, "max-frequency", &cid, sizeof(cid))) > 0)
184                 sc->max_clk = cid;
185
186         return (0);
187 }
188
189 static int
190 sdhci_fdt_attach(device_t dev)
191 {
192         struct sdhci_fdt_softc *sc = device_get_softc(dev);
193         struct sdhci_slot *slot;
194         int err, slots, rid, i;
195
196         sc->dev = dev;
197
198         /* Allocate IRQ. */
199         rid = 0;
200         sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
201             RF_ACTIVE);
202         if (sc->irq_res == NULL) {
203                 device_printf(dev, "Can't allocate IRQ\n");
204                 return (ENOMEM);
205         }
206
207         /* Scan all slots. */
208         slots = sc->num_slots;  /* number of slots determined in probe(). */
209         sc->num_slots = 0;
210         for (i = 0; i < slots; i++) {
211                 slot = &sc->slots[sc->num_slots];
212
213                 /* Allocate memory. */
214                 rid = 0;
215                 sc->mem_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
216                                                         &rid, RF_ACTIVE);
217                 if (sc->mem_res[i] == NULL) {
218                         device_printf(dev,
219                             "Can't allocate memory for slot %d\n", i);
220                         continue;
221                 }
222
223                 slot->quirks = sc->quirks;
224                 slot->caps = sc->caps;
225                 slot->max_clk = sc->max_clk;
226
227                 if (sdhci_init_slot(dev, slot, i) != 0)
228                         continue;
229
230                 sc->num_slots++;
231         }
232         device_printf(dev, "%d slot(s) allocated\n", sc->num_slots);
233
234         /* Activate the interrupt */
235         err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
236             NULL, sdhci_fdt_intr, sc, &sc->intrhand);
237         if (err) {
238                 device_printf(dev, "Cannot setup IRQ\n");
239                 return (err);
240         }
241
242         /* Process cards detection. */
243         for (i = 0; i < sc->num_slots; i++)
244                 sdhci_start_slot(&sc->slots[i]);
245
246         return (0);
247 }
248
249 static int
250 sdhci_fdt_detach(device_t dev)
251 {
252         struct sdhci_fdt_softc *sc = device_get_softc(dev);
253         int i;
254
255         bus_generic_detach(dev);
256         bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
257         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res),
258             sc->irq_res);
259
260         for (i = 0; i < sc->num_slots; i++) {
261                 sdhci_cleanup_slot(&sc->slots[i]);
262                 bus_release_resource(dev, SYS_RES_MEMORY,
263                     rman_get_rid(sc->mem_res[i]), sc->mem_res[i]);
264         }
265
266         return (0);
267 }
268
269 static device_method_t sdhci_fdt_methods[] = {
270         /* device_if */
271         DEVMETHOD(device_probe,         sdhci_fdt_probe),
272         DEVMETHOD(device_attach,        sdhci_fdt_attach),
273         DEVMETHOD(device_detach,        sdhci_fdt_detach),
274
275         /* Bus interface */
276         DEVMETHOD(bus_read_ivar,        sdhci_generic_read_ivar),
277         DEVMETHOD(bus_write_ivar,       sdhci_generic_write_ivar),
278
279         /* mmcbr_if */
280         DEVMETHOD(mmcbr_update_ios,     sdhci_generic_update_ios),
281         DEVMETHOD(mmcbr_request,        sdhci_generic_request),
282         DEVMETHOD(mmcbr_get_ro,         sdhci_generic_get_ro),
283         DEVMETHOD(mmcbr_acquire_host,   sdhci_generic_acquire_host),
284         DEVMETHOD(mmcbr_release_host,   sdhci_generic_release_host),
285
286         /* SDHCI registers accessors */
287         DEVMETHOD(sdhci_read_1,         sdhci_fdt_read_1),
288         DEVMETHOD(sdhci_read_2,         sdhci_fdt_read_2),
289         DEVMETHOD(sdhci_read_4,         sdhci_fdt_read_4),
290         DEVMETHOD(sdhci_read_multi_4,   sdhci_fdt_read_multi_4),
291         DEVMETHOD(sdhci_write_1,        sdhci_fdt_write_1),
292         DEVMETHOD(sdhci_write_2,        sdhci_fdt_write_2),
293         DEVMETHOD(sdhci_write_4,        sdhci_fdt_write_4),
294         DEVMETHOD(sdhci_write_multi_4,  sdhci_fdt_write_multi_4),
295
296         DEVMETHOD_END
297 };
298
299 static driver_t sdhci_fdt_driver = {
300         "sdhci_fdt",
301         sdhci_fdt_methods,
302         sizeof(struct sdhci_fdt_softc),
303 };
304 static devclass_t sdhci_fdt_devclass;
305
306 DRIVER_MODULE(sdhci_fdt, simplebus, sdhci_fdt_driver, sdhci_fdt_devclass,
307     NULL, NULL);
308 MODULE_DEPEND(sdhci_fdt, sdhci, 1, 1, 1);
309 MMC_DECLARE_BRIDGE(sdhci_fdt);