1 /*
2 * Copyright 2019 Emmanuel Vadot <manu@freebsd.org>
3 * Copyright (c) 2017 Ian Lepore <ian@freebsd.org> 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 are
7 * met:
8 *
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
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/bus.h>
30 #include <sys/kernel.h>
31 #include <sys/gpio.h>
32 #include <sys/taskqueue.h>
33
34 #include <dev/mmc/bridge.h>
35 #include <dev/mmc/mmc_helpers.h>
36
37 static inline void
mmc_parse_sd_speed(device_t dev,struct mmc_host * host)38 mmc_parse_sd_speed(device_t dev, struct mmc_host *host)
39 {
40 bool no_18v = false;
41
42 /*
43 * Parse SD supported modes
44 * All UHS-I modes requires 1.8V signaling.
45 */
46 if (device_has_property(dev, "no-1-8-v"))
47 no_18v = true;
48 if (device_has_property(dev, "cap-sd-highspeed"))
49 host->caps |= MMC_CAP_HSPEED;
50 if (device_has_property(dev, "sd-uhs-sdr12") && !no_18v)
51 host->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_SIGNALING_180;
52 if (device_has_property(dev, "sd-uhs-sdr25") && !no_18v)
53 host->caps |= MMC_CAP_UHS_SDR25 | MMC_CAP_SIGNALING_180;
54 if (device_has_property(dev, "sd-uhs-sdr50") && !no_18v)
55 host->caps |= MMC_CAP_UHS_SDR50 | MMC_CAP_SIGNALING_180;
56 if (device_has_property(dev, "sd-uhs-sdr104") && !no_18v)
57 host->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_SIGNALING_180;
58 if (device_has_property(dev, "sd-uhs-ddr50") && !no_18v)
59 host->caps |= MMC_CAP_UHS_DDR50 | MMC_CAP_SIGNALING_180;
60 }
61
62 static inline void
mmc_parse_mmc_speed(device_t dev,struct mmc_host * host)63 mmc_parse_mmc_speed(device_t dev, struct mmc_host *host)
64 {
65 /* Parse eMMC supported modes */
66 if (device_has_property(dev, "cap-mmc-highspeed"))
67 host->caps |= MMC_CAP_HSPEED;
68 if (device_has_property(dev, "mmc-ddr-1_2v"))
69 host->caps |= MMC_CAP_MMC_DDR52_120 | MMC_CAP_SIGNALING_120;
70 if (device_has_property(dev, "mmc-ddr-1_8v"))
71 host->caps |= MMC_CAP_MMC_DDR52_180 | MMC_CAP_SIGNALING_180;
72 if (device_has_property(dev, "mmc-ddr-3_3v"))
73 host->caps |= MMC_CAP_SIGNALING_330;
74 if (device_has_property(dev, "mmc-hs200-1_2v"))
75 host->caps |= MMC_CAP_MMC_HS200_120 | MMC_CAP_SIGNALING_120;
76 if (device_has_property(dev, "mmc-hs200-1_8v"))
77 host->caps |= MMC_CAP_MMC_HS200_180 | MMC_CAP_SIGNALING_180;
78 if (device_has_property(dev, "mmc-hs400-1_2v"))
79 host->caps |= MMC_CAP_MMC_HS400_120 | MMC_CAP_SIGNALING_120;
80 if (device_has_property(dev, "mmc-hs400-1_8v"))
81 host->caps |= MMC_CAP_MMC_HS400_180 | MMC_CAP_SIGNALING_180;
82 if (device_has_property(dev, "mmc-hs400-enhanced-strobe"))
83 host->caps |= MMC_CAP_MMC_ENH_STROBE;
84 }
85
86 int
mmc_parse(device_t dev,struct mmc_helper * helper,struct mmc_host * host)87 mmc_parse(device_t dev, struct mmc_helper *helper, struct mmc_host *host)
88 {
89 uint32_t bus_width, max_freq;
90
91 bus_width = 0;
92 if (device_get_property(dev, "bus-width", &bus_width,
93 sizeof(bus_width), DEVICE_PROP_UINT32) <= 0)
94 bus_width = 1;
95
96 if (bus_width >= 4)
97 host->caps |= MMC_CAP_4_BIT_DATA;
98 if (bus_width >= 8)
99 host->caps |= MMC_CAP_8_BIT_DATA;
100
101 /*
102 * max-frequency is optional, drivers should tweak this value
103 * if it's not present based on the clock that the mmc controller
104 * operates on
105 */
106 if (device_get_property(dev, "max-frequency", &max_freq,
107 sizeof(max_freq), DEVICE_PROP_UINT32) > 0)
108 host->f_max = max_freq;
109
110 if (device_has_property(dev, "broken-cd"))
111 helper->props |= MMC_PROP_BROKEN_CD;
112 if (device_has_property(dev, "non-removable"))
113 helper->props |= MMC_PROP_NON_REMOVABLE;
114 if (device_has_property(dev, "wp-inverted"))
115 helper->props |= MMC_PROP_WP_INVERTED;
116 if (device_has_property(dev, "cd-inverted"))
117 helper->props |= MMC_PROP_CD_INVERTED;
118 if (device_has_property(dev, "no-sdio"))
119 helper->props |= MMC_PROP_NO_SDIO;
120 if (device_has_property(dev, "no-sd"))
121 helper->props |= MMC_PROP_NO_SD;
122 if (device_has_property(dev, "no-mmc"))
123 helper->props |= MMC_PROP_NO_MMC;
124
125 if (!(helper->props & MMC_PROP_NO_SD))
126 mmc_parse_sd_speed(dev, host);
127
128 if (!(helper->props & MMC_PROP_NO_MMC))
129 mmc_parse_mmc_speed(dev, host);
130
131 return (0);
132 }
133