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MFC 265208: Honor the max-frequency property if it appears in the fdt data.
[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/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         uint32_t        max_clk;        /* Max possible freq */
70         struct resource *irq_res;       /* IRQ resource */
71         void            *intrhand;      /* Interrupt handle */
72
73         int             num_slots;      /* Number of slots on this controller*/
74         struct sdhci_slot slots[MAX_SLOTS];
75         struct resource *mem_res[MAX_SLOTS];    /* Memory resource */
76 };
77
78 static uint8_t
79 sdhci_fdt_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
80 {
81         struct sdhci_fdt_softc *sc = device_get_softc(dev);
82         return (bus_read_1(sc->mem_res[slot->num], off));
83 }
84
85 static void
86 sdhci_fdt_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off,
87                   uint8_t val)
88 {
89         struct sdhci_fdt_softc *sc = device_get_softc(dev);
90         bus_write_1(sc->mem_res[slot->num], off, val);
91 }
92
93 static uint16_t
94 sdhci_fdt_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off)
95 {
96         struct sdhci_fdt_softc *sc = device_get_softc(dev);
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         bus_write_2(sc->mem_res[slot->num], off, val);
106 }
107
108 static uint32_t
109 sdhci_fdt_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
110 {
111         struct sdhci_fdt_softc *sc = device_get_softc(dev);
112         return (bus_read_4(sc->mem_res[slot->num], off));
113 }
114
115 static void
116 sdhci_fdt_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
117                   uint32_t val)
118 {
119         struct sdhci_fdt_softc *sc = device_get_softc(dev);
120         bus_write_4(sc->mem_res[slot->num], off, val);
121 }
122
123 static void
124 sdhci_fdt_read_multi_4(device_t dev, struct sdhci_slot *slot,
125     bus_size_t off, uint32_t *data, bus_size_t count)
126 {
127         struct sdhci_fdt_softc *sc = device_get_softc(dev);
128         bus_read_multi_4(sc->mem_res[slot->num], off, data, count);
129 }
130
131 static void
132 sdhci_fdt_write_multi_4(device_t dev, struct sdhci_slot *slot,
133     bus_size_t off, uint32_t *data, bus_size_t count)
134 {
135         struct sdhci_fdt_softc *sc = device_get_softc(dev);
136         bus_write_multi_4(sc->mem_res[slot->num], off, data, count);
137 }
138
139 static void
140 sdhci_fdt_intr(void *arg)
141 {
142         struct sdhci_fdt_softc *sc = (struct sdhci_fdt_softc *)arg;
143         int i;
144
145         for (i = 0; i < sc->num_slots; i++) {
146                 struct sdhci_slot *slot = &sc->slots[i];
147                 sdhci_generic_intr(slot);
148         }
149 }
150
151 static int
152 sdhci_fdt_probe(device_t dev)
153 {
154         struct sdhci_fdt_softc *sc = device_get_softc(dev);
155         phandle_t node;
156         pcell_t cid;
157
158         sc->quirks = 0;
159         sc->num_slots = 1;
160         sc->max_clk = 0;
161
162         if (!ofw_bus_status_okay(dev))
163                 return (ENXIO);
164
165         if (ofw_bus_is_compatible(dev, "sdhci_generic")) {
166                 device_set_desc(dev, "generic fdt SDHCI controller");
167         } else if (ofw_bus_is_compatible(dev, "xlnx,zy7_sdhci")) {
168                 sc->quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
169                 device_set_desc(dev, "Zynq-7000 generic fdt SDHCI controller");
170         } else
171                 return (ENXIO);
172
173         node = ofw_bus_get_node(dev);
174
175         /* Allow dts to patch quirks, slots, and max-frequency. */
176         if ((OF_getencprop(node, "quirks", &cid, sizeof(cid))) > 0)
177                 sc->quirks = cid;
178         if ((OF_getencprop(node, "num-slots", &cid, sizeof(cid))) > 0)
179                 sc->num_slots = cid;
180         if ((OF_getencprop(node, "max-frequency", &cid, sizeof(cid))) > 0)
181                 sc->max_clk = cid;
182
183                 
184         return (0);
185 }
186
187 static int
188 sdhci_fdt_attach(device_t dev)
189 {
190         struct sdhci_fdt_softc *sc = device_get_softc(dev);
191         int err, slots, rid, i;
192         
193         sc->dev = dev;
194
195         /* Allocate IRQ. */
196         rid = 0;
197         sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
198                                              RF_ACTIVE);
199         if (sc->irq_res == NULL) {
200                 device_printf(dev, "Can't allocate IRQ\n");
201                 return (ENOMEM);
202         }
203
204         /* Scan all slots. */
205         slots = sc->num_slots;  /* number of slots determined in probe(). */
206         sc->num_slots = 0;
207         for (i = 0; i < slots; i++) {
208                 struct sdhci_slot *slot = &sc->slots[sc->num_slots];
209
210                 /* Allocate memory. */
211                 rid = 0;
212                 sc->mem_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
213                                                         &rid, RF_ACTIVE);
214                 if (sc->mem_res[i] == NULL) {
215                         device_printf(dev, "Can't allocate memory for "
216                                       "slot %d\n", i);
217                         continue;
218                 }
219
220                 slot->quirks = sc->quirks;
221                 slot->caps = sc->caps;
222                 slot->max_clk = sc->max_clk;
223
224                 if (sdhci_init_slot(dev, slot, i) != 0)
225                         continue;
226
227                 sc->num_slots++;
228         }
229         device_printf(dev, "%d slot(s) allocated\n", sc->num_slots);
230
231         /* Activate the interrupt */
232         err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
233             NULL, sdhci_fdt_intr, sc, &sc->intrhand);
234         if (err) {
235                 device_printf(dev, "Cannot setup IRQ\n");
236                 return (err);
237         }
238
239         /* Process cards detection. */
240         for (i = 0; i < sc->num_slots; i++) {
241                 struct sdhci_slot *slot = &sc->slots[i];
242                 sdhci_start_slot(slot);
243         }
244                 
245         return (0);
246 }
247
248 static int
249 sdhci_fdt_detach(device_t dev)
250 {
251         struct sdhci_fdt_softc *sc = device_get_softc(dev);
252         int i;
253
254         bus_generic_detach(dev);
255         bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
256         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res),
257                              sc->irq_res);
258
259         for (i = 0; i < sc->num_slots; i++) {
260                 struct sdhci_slot *slot = &sc->slots[i];
261
262                 sdhci_cleanup_slot(slot);
263                 bus_release_resource(dev, SYS_RES_MEMORY,
264                                      rman_get_rid(sc->mem_res[i]),
265                                      sc->mem_res[i]);
266         }
267
268         return (0);
269 }
270
271 static device_method_t sdhci_fdt_methods[] = {
272         /* device_if */
273         DEVMETHOD(device_probe,         sdhci_fdt_probe),
274         DEVMETHOD(device_attach,        sdhci_fdt_attach),
275         DEVMETHOD(device_detach,        sdhci_fdt_detach),
276
277         /* Bus interface */
278         DEVMETHOD(bus_read_ivar,        sdhci_generic_read_ivar),
279         DEVMETHOD(bus_write_ivar,       sdhci_generic_write_ivar),
280
281         /* mmcbr_if */
282         DEVMETHOD(mmcbr_update_ios,     sdhci_generic_update_ios),
283         DEVMETHOD(mmcbr_request,        sdhci_generic_request),
284         DEVMETHOD(mmcbr_get_ro,         sdhci_generic_get_ro),
285         DEVMETHOD(mmcbr_acquire_host,   sdhci_generic_acquire_host),
286         DEVMETHOD(mmcbr_release_host,   sdhci_generic_release_host),
287
288         /* SDHCI registers accessors */
289         DEVMETHOD(sdhci_read_1,         sdhci_fdt_read_1),
290         DEVMETHOD(sdhci_read_2,         sdhci_fdt_read_2),
291         DEVMETHOD(sdhci_read_4,         sdhci_fdt_read_4),
292         DEVMETHOD(sdhci_read_multi_4,   sdhci_fdt_read_multi_4),
293         DEVMETHOD(sdhci_write_1,        sdhci_fdt_write_1),
294         DEVMETHOD(sdhci_write_2,        sdhci_fdt_write_2),
295         DEVMETHOD(sdhci_write_4,        sdhci_fdt_write_4),
296         DEVMETHOD(sdhci_write_multi_4,  sdhci_fdt_write_multi_4),
297
298         DEVMETHOD_END
299 };
300
301 static driver_t sdhci_fdt_driver = {
302         "sdhci_fdt",
303         sdhci_fdt_methods,
304         sizeof(struct sdhci_fdt_softc),
305 };
306 static devclass_t sdhci_fdt_devclass;
307
308 DRIVER_MODULE(sdhci_fdt, simplebus, sdhci_fdt_driver, sdhci_fdt_devclass, 0,0);
309 MODULE_DEPEND(sdhci_fdt, sdhci, 1, 1, 1);