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1 | /* |
2 | * Copyright (c) 2017 Ian Sutton <ian@ce.gl> |
3 | * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org> |
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. |
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25 | * |
26 | * USB subsystem driver for am335x. Derived from FreeBSD version. |
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27 | */ |
28 | |
29 | #include <sys/param.h> |
30 | #include <sys/systm.h> |
31 | #include <sys/device.h> |
32 | #include <sys/kernel.h> |
33 | |
34 | #include <dev/ofw/openfirm.h> |
35 | #include <dev/ofw/fdt.h> |
36 | |
37 | #include <machine/fdt.h> |
38 | |
39 | #include <arm/simplebus/simplebusvar.h> |
40 | |
41 | #include <armv7/omap/prcmvar.h> |
42 | |
43 | #define DEVNAME(_s) ((_s)->sc_dev.dv_xname) |
44 | |
45 | #define AMUSBSS_DEBUG /* XXX */ |
46 | |
47 | #ifdef AMUSBSS_DEBUG |
48 | int amusbss_debug = 20; |
49 | #define DPRINTF(n,s) do { if ((n) <= amusbss_debug) printf s; } while (0) |
50 | #else |
51 | #define DPRINTF(n,s) do {} |
52 | #endif |
53 | |
54 | #define HREAD4(sc, reg) \ |
55 | (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) |
56 | #define HWRITE4(sc, reg, val) \ |
57 | bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) |
58 | #define HSET4(sc, reg, bits) \ |
59 | HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits)) |
60 | #define HCLR4(sc, reg, bits) \ |
61 | HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits)) |
62 | |
63 | #define USBSS_REVREG 0x00 |
64 | #define USBSS_SYSCONFIG 0x10 |
65 | #define USBSS_SYSCONFIG_SRESET 1 |
66 | |
67 | #define USBCTRL_REV 0x00 |
68 | #define USBCTRL_CTRL 0x14 |
69 | #define USBCTRL_STAT 0x18 |
70 | #define USBCTRL_IRQ_STAT0 0x30 |
71 | #define IRQ_STAT0_RXSHIFT 16 |
72 | #define IRQ_STAT0_TXSHIFT 0 |
73 | #define USBCTRL_IRQ_STAT1 0x34 |
74 | #define IRQ_STAT1_DRVVBUS (1 << 8) |
75 | #define USBCTRL_INTEN_SET0 0x38 |
76 | #define USBCTRL_INTEN_SET1 0x3C |
77 | #define USBCTRL_INTEN_USB_ALL 0x1ff |
78 | #define USBCTRL_INTEN_USB_SOF (1 << 3) |
79 | #define USBCTRL_INTEN_CLR0 0x40 |
80 | #define USBCTRL_INTEN_CLR1 0x44 |
81 | #define USBCTRL_UTMI 0xE0 |
82 | #define USBCTRL_UTMI_FSDATAEXT (1 << 1) |
83 | #define USBCTRL_MODE 0xE8 |
84 | #define USBCTRL_MODE_IDDIG (1 << 8) |
85 | #define USBCTRL_MODE_IDDIGMUX (1 << 7) |
86 | |
87 | struct amusbss_softc { |
88 | struct device sc_dev; |
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89 | bus_space_tag_t sc_iot; |
90 | bus_space_handle_t sc_ioh; |
91 | }; |
92 | |
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93 | /* Needed in attaching ammusb devices via config_search(9) */ |
94 | extern struct cfattach ammusb_ca; |
95 | //extern void simplebus_attach_node(struct device *, int); |
96 | |
97 | /* core decl */ |
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98 | int amusbss_match(struct device *, void *, void *); |
99 | void amusbss_attach(struct device *, struct device *, void *); |
100 | int amusbss_detach(struct device *, int); |
101 | void amusbss_reset(struct amusbss_softc *); |
102 | |
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103 | /* debug decl */ |
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104 | void amusbss_preg(uint32_t, char *, struct amusbss_softc *); |
105 | void amusbss_dumpregs(struct amusbss_softc *); |
106 | |
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107 | /* core/iomux.c defs */ |
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108 | struct cfattach amusbss_ca = { |
109 | sizeof (struct amusbss_softc), amusbss_match, amusbss_attach, amusbss_detach |
110 | }; |
111 | |
112 | struct cfdriver amusbss_cd = { |
113 | NULL, "amusbss", DV_DULL |
114 | }; |
115 | |
116 | int |
117 | amusbss_match(struct device *parent, void *v, void *aux) |
118 | { |
119 | struct fdt_attach_args *faa = aux; |
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120 | return OF_is_compatible(faa->fa_node, "ti,am33xx-usb"); |
121 | } |
122 | |
123 | void |
124 | amusbss_attach(struct device *parent, struct device *self, void *args) |
125 | { |
126 | struct amusbss_softc *sc = (struct amusbss_softc *) self; |
127 | struct fdt_attach_args *faa = args; |
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128 | int i, node; |
129 | uint32_t rev; |
130 | |
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131 | sc->sc_iot = faa->fa_iot; |
132 | if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, 0, |
133 | &sc->sc_ioh)) |
134 | panic("%s: bus_space_map failed!", __func__); |
135 | |
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136 | /* Enable device clocks */ |
137 | prcm_enablemodule(PRCM_USB); |
138 | |
139 | /* Reset USB subsystem, USB0 and USB1 */ |
140 | HWRITE4(sc, USBSS_SYSCONFIG, USBSS_SYSCONFIG_SRESET); |
141 | delay(100); |
142 | i = 10; |
143 | while (HREAD4(sc, USBSS_SYSCONFIG) & USBSS_SYSCONFIG_SRESET) { |
144 | delay(100); |
145 | if (i-- == 0) { |
146 | printf(": reset timeout.\n"); |
147 | return; |
148 | } |
149 | } |
150 | |
151 | rev = HREAD4(sc, USBSS_REVREG); |
152 | printf(": rev %d.%d\n", rev >> 4 &0xf, rev & 0xf); |
153 | |
154 | /* Walk the OFW tree and attach top-level devices */ |
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155 | for (node = OF_child(faa->fa_node); node > 0; node = OF_peer(node)) |
156 | simplebus_attach_node(parent, node); |
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157 | } |
158 | |
159 | int |
160 | amusbss_detach(struct device *self, int flags) |
161 | { |
162 | return 0; /* XXX */ |
163 | } |
164 | |