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Copy needed include files from EDK2. This is a minimal set gleened
[FreeBSD/FreeBSD.git] / sys / arm / nvidia / tegra_sdhci.c
1 /*-
2  * Copyright (c) 2016 Michal Meloun <mmel@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  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31  * SDHCI driver glue for NVIDIA Tegra family
32  *
33  */
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/types.h>
37 #include <sys/bus.h>
38 #include <sys/gpio.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/mutex.h>
44 #include <sys/resource.h>
45 #include <sys/rman.h>
46 #include <sys/sysctl.h>
47 #include <sys/taskqueue.h>
48
49 #include <machine/bus.h>
50 #include <machine/resource.h>
51 #include <machine/intr.h>
52
53 #include <dev/extres/clk/clk.h>
54 #include <dev/extres/hwreset/hwreset.h>
55 #include <dev/gpio/gpiobusvar.h>
56 #include <dev/mmc/bridge.h>
57 #include <dev/mmc/mmcbrvar.h>
58 #include <dev/ofw/ofw_bus.h>
59 #include <dev/ofw/ofw_bus_subr.h>
60 #include <dev/sdhci/sdhci.h>
61 #include <dev/sdhci/sdhci_fdt_gpio.h>
62
63 #include "sdhci_if.h"
64
65 /* Tegra SDHOST controller vendor register definitions */
66 #define SDMMC_VENDOR_CLOCK_CNTRL                0x100
67 #define  VENDOR_CLOCK_CNTRL_CLK_SHIFT                   8
68 #define  VENDOR_CLOCK_CNTRL_CLK_MASK                    0xFF
69 #define SDMMC_VENDOR_SYS_SW_CNTRL               0x104
70 #define SDMMC_VENDOR_CAP_OVERRIDES              0x10C
71 #define SDMMC_VENDOR_BOOT_CNTRL                 0x110
72 #define SDMMC_VENDOR_BOOT_ACK_TIMEOUT           0x114
73 #define SDMMC_VENDOR_BOOT_DAT_TIMEOUT           0x118
74 #define SDMMC_VENDOR_DEBOUNCE_COUNT             0x11C
75 #define SDMMC_VENDOR_MISC_CNTRL                 0x120
76 #define  VENDOR_MISC_CTRL_ENABLE_SDR104                 0x8
77 #define  VENDOR_MISC_CTRL_ENABLE_SDR50                  0x10
78 #define  VENDOR_MISC_CTRL_ENABLE_SDHCI_SPEC_300         0x20
79 #define  VENDOR_MISC_CTRL_ENABLE_DDR50                  0x200
80 #define SDMMC_MAX_CURRENT_OVERRIDE              0x124
81 #define SDMMC_MAX_CURRENT_OVERRIDE_HI           0x128
82 #define SDMMC_VENDOR_CLK_GATE_HYSTERESIS_COUNT  0x1D0
83 #define SDMMC_VENDOR_PHWRESET_VAL0              0x1D4
84 #define SDMMC_VENDOR_PHWRESET_VAL1              0x1D8
85 #define SDMMC_VENDOR_PHWRESET_VAL2              0x1DC
86 #define SDMMC_SDMEMCOMPPADCTRL_0                0x1E0
87 #define SDMMC_AUTO_CAL_CONFIG                   0x1E4
88 #define SDMMC_AUTO_CAL_INTERVAL                 0x1E8
89 #define SDMMC_AUTO_CAL_STATUS                   0x1EC
90 #define SDMMC_SDMMC_MCCIF_FIFOCTRL              0x1F4
91 #define SDMMC_TIMEOUT_WCOAL_SDMMC               0x1F8
92
93 /* Compatible devices. */
94 static struct ofw_compat_data compat_data[] = {
95         {"nvidia,tegra124-sdhci",       1},
96         {NULL,                          0},
97 };
98
99 struct tegra_sdhci_softc {
100         device_t                dev;
101         struct resource *       mem_res;
102         struct resource *       irq_res;
103         void *                  intr_cookie;
104         u_int                   quirks; /* Chip specific quirks */
105         u_int                   caps;   /* If we override SDHCI_CAPABILITIES */
106         uint32_t                max_clk; /* Max possible freq */
107         clk_t                   clk;
108         hwreset_t               reset;
109         gpio_pin_t              gpio_power;
110         struct sdhci_fdt_gpio   *gpio;
111
112         int                     force_card_present;
113         struct sdhci_slot       slot;
114
115 };
116
117 static inline uint32_t
118 RD4(struct tegra_sdhci_softc *sc, bus_size_t off)
119 {
120
121         return (bus_read_4(sc->mem_res, off));
122 }
123
124 static uint8_t
125 tegra_sdhci_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
126 {
127         struct tegra_sdhci_softc *sc;
128
129         sc = device_get_softc(dev);
130         return (bus_read_1(sc->mem_res, off));
131 }
132
133 static uint16_t
134 tegra_sdhci_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off)
135 {
136         struct tegra_sdhci_softc *sc;
137
138         sc = device_get_softc(dev);
139         return (bus_read_2(sc->mem_res, off));
140 }
141
142 static uint32_t
143 tegra_sdhci_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
144 {
145         struct tegra_sdhci_softc *sc;
146         uint32_t val32;
147
148         sc = device_get_softc(dev);
149         val32 = bus_read_4(sc->mem_res, off);
150         /* Force the card-present state if necessary. */
151         if (off == SDHCI_PRESENT_STATE && sc->force_card_present)
152                 val32 |= SDHCI_CARD_PRESENT;
153         return (val32);
154 }
155
156 static void
157 tegra_sdhci_read_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
158     uint32_t *data, bus_size_t count)
159 {
160         struct tegra_sdhci_softc *sc;
161
162         sc = device_get_softc(dev);
163         bus_read_multi_4(sc->mem_res, off, data, count);
164 }
165
166 static void
167 tegra_sdhci_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off,
168     uint8_t val)
169 {
170         struct tegra_sdhci_softc *sc;
171
172         sc = device_get_softc(dev);
173         bus_write_1(sc->mem_res, off, val);
174 }
175
176 static void
177 tegra_sdhci_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off,
178     uint16_t val)
179 {
180         struct tegra_sdhci_softc *sc;
181
182         sc = device_get_softc(dev);
183         bus_write_2(sc->mem_res, off, val);
184 }
185
186 static void
187 tegra_sdhci_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
188     uint32_t val)
189 {
190         struct tegra_sdhci_softc *sc;
191
192         sc = device_get_softc(dev);
193         bus_write_4(sc->mem_res, off, val);
194 }
195
196 static void
197 tegra_sdhci_write_multi_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
198     uint32_t *data, bus_size_t count)
199 {
200         struct tegra_sdhci_softc *sc;
201
202         sc = device_get_softc(dev);
203         bus_write_multi_4(sc->mem_res, off, data, count);
204 }
205
206 static void
207 tegra_sdhci_intr(void *arg)
208 {
209         struct tegra_sdhci_softc *sc = arg;
210
211         sdhci_generic_intr(&sc->slot);
212         RD4(sc, SDHCI_INT_STATUS);
213 }
214
215 static int
216 tegra_sdhci_get_ro(device_t brdev, device_t reqdev)
217 {
218         struct tegra_sdhci_softc *sc = device_get_softc(brdev);
219
220         return (sdhci_fdt_gpio_get_readonly(sc->gpio));
221 }
222
223 static bool
224 tegra_sdhci_get_card_present(device_t dev, struct sdhci_slot *slot)
225 {
226         struct tegra_sdhci_softc *sc = device_get_softc(dev);
227
228         return (sdhci_fdt_gpio_get_present(sc->gpio));
229 }
230
231 static int
232 tegra_sdhci_probe(device_t dev)
233 {
234         struct tegra_sdhci_softc *sc;
235         phandle_t node;
236         pcell_t cid;
237         const struct ofw_compat_data *cd;
238
239         sc = device_get_softc(dev);
240         if (!ofw_bus_status_okay(dev))
241                 return (ENXIO);
242
243         if (ofw_bus_is_compatible(dev, "nvidia,tegra124-sdhci")) {
244                 device_set_desc(dev, "Tegra SDHCI controller");
245         } else
246                 return (ENXIO);
247         cd = ofw_bus_search_compatible(dev, compat_data);
248         if (cd->ocd_data == 0)
249                 return (ENXIO);
250
251         node = ofw_bus_get_node(dev);
252
253         /* Allow dts to patch quirks, slots, and max-frequency. */
254         if ((OF_getencprop(node, "quirks", &cid, sizeof(cid))) > 0)
255                 sc->quirks = cid;
256         if ((OF_getencprop(node, "max-frequency", &cid, sizeof(cid))) > 0)
257                 sc->max_clk = cid;
258
259         return (BUS_PROBE_DEFAULT);
260 }
261
262 static int
263 tegra_sdhci_attach(device_t dev)
264 {
265         struct tegra_sdhci_softc *sc;
266         int rid, rv;
267         uint64_t freq;
268         phandle_t node, prop;
269
270         sc = device_get_softc(dev);
271         sc->dev = dev;
272         node = ofw_bus_get_node(dev);
273
274         rid = 0;
275         sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
276             RF_ACTIVE);
277         if (!sc->mem_res) {
278                 device_printf(dev, "cannot allocate memory window\n");
279                 rv = ENXIO;
280                 goto fail;
281         }
282
283         rid = 0;
284         sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
285             RF_ACTIVE);
286         if (!sc->irq_res) {
287                 device_printf(dev, "cannot allocate interrupt\n");
288                 rv = ENXIO;
289                 goto fail;
290         }
291
292         if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
293             NULL, tegra_sdhci_intr, sc, &sc->intr_cookie)) {
294                 device_printf(dev, "cannot setup interrupt handler\n");
295                 rv = ENXIO;
296                 goto fail;
297         }
298
299         rv = hwreset_get_by_ofw_name(sc->dev, 0, "sdhci", &sc->reset);
300         if (rv != 0) {
301                 device_printf(sc->dev, "Cannot get 'sdhci' reset\n");
302                 goto fail;
303         }
304         rv = hwreset_deassert(sc->reset);
305         if (rv != 0) {
306                 device_printf(dev, "Cannot unreset 'sdhci' reset\n");
307                 goto fail;
308         }
309
310         gpio_pin_get_by_ofw_property(sc->dev, node, "power-gpios", &sc->gpio_power);
311
312         rv = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
313         if (rv != 0) {
314
315                 device_printf(dev, "Cannot get clock\n");
316                 goto fail;
317         }
318
319         rv = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
320         if (rv != 0) {
321                 device_printf(dev, "Cannot get clock\n");
322                 goto fail;
323         }
324         rv = clk_enable(sc->clk);
325         if (rv != 0) {
326                 device_printf(dev, "Cannot enable clock\n");
327                 goto fail;
328         }
329         rv = clk_set_freq(sc->clk, 48000000, CLK_SET_ROUND_DOWN);
330         if (rv != 0) {
331                 device_printf(dev, "Cannot set clock\n");
332         }
333         rv = clk_get_freq(sc->clk, &freq);
334         if (rv != 0) {
335                 device_printf(dev, "Cannot get clock frequency\n");
336                 goto fail;
337         }
338         if (bootverbose)
339                 device_printf(dev, " Base MMC clock: %lld\n", freq);
340
341         /* Fill slot information. */
342         sc->max_clk = (int)freq;
343         sc->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
344             SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
345             SDHCI_QUIRK_MISSING_CAPS;
346
347         /* Limit real slot capabilities. */
348         sc->caps = RD4(sc, SDHCI_CAPABILITIES);
349         if (OF_getencprop(node, "bus-width", &prop, sizeof(prop)) > 0) {
350                 sc->caps &= ~(MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA);
351                 switch (prop) {
352                 case 8:
353                         sc->caps |= MMC_CAP_8_BIT_DATA;
354                         /* FALLTHROUGH */
355                 case 4:
356                         sc->caps |= MMC_CAP_4_BIT_DATA;
357                         break;
358                 case 1:
359                         break;
360                 default:
361                         device_printf(dev, "Bad bus-width value %u\n", prop);
362                         break;
363                 }
364         }
365         if (OF_hasprop(node, "non-removable"))
366                 sc->force_card_present = 1;
367         /*
368          * Clear clock field, so SDHCI driver uses supplied frequency.
369          * in sc->slot.max_clk
370          */
371         sc->caps &= ~SDHCI_CLOCK_V3_BASE_MASK;
372
373         sc->slot.quirks = sc->quirks;
374         sc->slot.max_clk = sc->max_clk;
375         sc->slot.caps = sc->caps;
376
377         rv = sdhci_init_slot(dev, &sc->slot, 0);
378         if (rv != 0) {
379                 goto fail;
380         }
381
382         sc->gpio = sdhci_fdt_gpio_setup(sc->dev, &sc->slot);
383
384         bus_generic_probe(dev);
385         bus_generic_attach(dev);
386
387         sdhci_start_slot(&sc->slot);
388
389         return (0);
390
391 fail:
392         if (sc->gpio != NULL)
393                 sdhci_fdt_gpio_teardown(sc->gpio);
394         if (sc->intr_cookie != NULL)
395                 bus_teardown_intr(dev, sc->irq_res, sc->intr_cookie);
396         if (sc->gpio_power != NULL)
397                 gpio_pin_release(sc->gpio_power);
398         if (sc->clk != NULL)
399                 clk_release(sc->clk);
400         if (sc->reset != NULL)
401                 hwreset_release(sc->reset);
402         if (sc->irq_res != NULL)
403                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
404         if (sc->mem_res != NULL)
405                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->mem_res);
406
407         return (rv);
408 }
409
410 static int
411 tegra_sdhci_detach(device_t dev)
412 {
413         struct tegra_sdhci_softc *sc = device_get_softc(dev);
414         struct sdhci_slot *slot = &sc->slot;
415
416         bus_generic_detach(dev);
417         sdhci_fdt_gpio_teardown(sc->gpio);
418         clk_release(sc->clk);
419         bus_teardown_intr(dev, sc->irq_res, sc->intr_cookie);
420         bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res),
421                              sc->irq_res);
422
423         sdhci_cleanup_slot(slot);
424         bus_release_resource(dev, SYS_RES_MEMORY,
425                              rman_get_rid(sc->mem_res),
426                              sc->mem_res);
427         return (0);
428 }
429
430 static device_method_t tegra_sdhci_methods[] = {
431         /* Device interface */
432         DEVMETHOD(device_probe,         tegra_sdhci_probe),
433         DEVMETHOD(device_attach,        tegra_sdhci_attach),
434         DEVMETHOD(device_detach,        tegra_sdhci_detach),
435
436         /* Bus interface */
437         DEVMETHOD(bus_read_ivar,        sdhci_generic_read_ivar),
438         DEVMETHOD(bus_write_ivar,       sdhci_generic_write_ivar),
439
440         /* MMC bridge interface */
441         DEVMETHOD(mmcbr_update_ios,     sdhci_generic_update_ios),
442         DEVMETHOD(mmcbr_request,        sdhci_generic_request),
443         DEVMETHOD(mmcbr_get_ro,         tegra_sdhci_get_ro),
444         DEVMETHOD(mmcbr_acquire_host,   sdhci_generic_acquire_host),
445         DEVMETHOD(mmcbr_release_host,   sdhci_generic_release_host),
446
447         /* SDHCI registers accessors */
448         DEVMETHOD(sdhci_read_1,         tegra_sdhci_read_1),
449         DEVMETHOD(sdhci_read_2,         tegra_sdhci_read_2),
450         DEVMETHOD(sdhci_read_4,         tegra_sdhci_read_4),
451         DEVMETHOD(sdhci_read_multi_4,   tegra_sdhci_read_multi_4),
452         DEVMETHOD(sdhci_write_1,        tegra_sdhci_write_1),
453         DEVMETHOD(sdhci_write_2,        tegra_sdhci_write_2),
454         DEVMETHOD(sdhci_write_4,        tegra_sdhci_write_4),
455         DEVMETHOD(sdhci_write_multi_4,  tegra_sdhci_write_multi_4),
456         DEVMETHOD(sdhci_get_card_present, tegra_sdhci_get_card_present),
457
458         DEVMETHOD_END
459 };
460
461 static devclass_t tegra_sdhci_devclass;
462 static DEFINE_CLASS_0(sdhci, tegra_sdhci_driver, tegra_sdhci_methods,
463     sizeof(struct tegra_sdhci_softc));
464 DRIVER_MODULE(sdhci_tegra, simplebus, tegra_sdhci_driver, tegra_sdhci_devclass,
465     NULL, NULL);
466 MODULE_DEPEND(sdhci_tegra, sdhci, 1, 1, 1);
467 MMC_DECLARE_BRIDGE(sdhci_tegra);