xref: /freebsd/sys/arm/mv/clk/a37x0_sb_periph_clk_driver.c (revision e6bfd18d21b225af6a0ed67ceeaf1293b7b9eba5)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2021 Semihalf.
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 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 PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 #include <sys/param.h>
29 #include <sys/bus.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/mutex.h>
33 #include <sys/rman.h>
34 #include <machine/bus.h>
35 
36 #include <dev/fdt/simplebus.h>
37 
38 #include <dev/extres/clk/clk.h>
39 #include <dev/extres/clk/clk_fixed.h>
40 
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43 
44 #include "clkdev_if.h"
45 #include "periph.h"
46 
47 #define SB_DEV_COUNT 14
48 
49 static struct a37x0_periph_clknode_def a37x0_sb_devices [] = {
50 	CLK_MDD("gbe_50", 0, 6, 1, DIV_SEL2, DIV_SEL2, 6, 9,
51 	    "tbg_mux_gbe_50_120", "div1_gbe_50_121", "div2_gbe_50_122"),
52 	CLK_MDD("gbe_core", 1, 8, 5, DIV_SEL1, DIV_SEL1, 18, 21,
53 	    "tbg_mux_gbe_core_124", "div1_gbe_core_125", "div2_gbe_core_126"),
54 	CLK_MDD("gbe_125", 2, 10, 3, DIV_SEL1, DIV_SEL1, 6, 9,
55 	    "tbg_mux_gbe_125_128", "div1_gbe_50_129", "div2_gbe_50_130"),
56 	CLK_GATE("gbe1_50", 3, 0, "gbe_50"),
57 	CLK_GATE("gbe0_50", 4, 1, "gbe_50"),
58 	CLK_GATE("gbe1_125", 5, 2, "gbe_125"),
59 	CLK_GATE("gbe0_125", 6, 3, "gbe_125"),
60 	CLK_MUX_GATE("gbe1_core", 7, 4, 13, "gbe_core",
61 	    "mux_gbe1_core_136", "fixed_gbe1_core_138"),
62 	CLK_MUX_GATE("gbe0_core", 8, 5, 14, "gbe_core",
63 	    "mux_gbe0_core_139", "fixed_gbe0_core_141"),
64 	CLK_MUX_GATE("gbe_bm", 9, 12, 12, "gbe_core",
65 	    "mux_gbe_bm_136", "fixed_gbe_bm_138"),
66 	CLK_FULL_DD("sdio", 10, 11, 14, 7, DIV_SEL0, DIV_SEL0, 3, 6,
67 	    "tbg_mux_sdio_139", "div1_sdio_140", "div2_sdio_141",
68 	    "clk_mux_sdio_142"),
69 	CLK_FULL_DD("usb32_usb2_sys", 11, 16, 16, 8, DIV_SEL0, DIV_SEL0, 9, 12,
70 	    "tbg_mux_usb32_usb2_sys_144", "div1_usb32_usb2_sys_145",
71 	    "div2_usb32_usb2_sys_146", "clk_mux_usb32_usb2_sys_147"),
72 	CLK_FULL_DD("usb32_ss_sys", 12, 17, 18, 9, DIV_SEL0, DIV_SEL0, 15, 18,
73 	    "tbg_mux_usb32_ss_sys_149", "div1_usb32_ss_sys_150",
74 	    "div2_usb32_ss_sys_151", "clk_mux_usb32_ss_sys_152"),
75 	CLK_GATE("pcie", 13, 14, "gbe_core")
76 };
77 
78 static struct ofw_compat_data a37x0_sb_periph_compat_data[] = {
79 	{ "marvell,armada-3700-periph-clock-sb",	1 },
80 	{ NULL,						0 }
81 };
82 
83 static int a37x0_sb_periph_clk_attach(device_t);
84 static int a37x0_sb_periph_clk_probe(device_t);
85 
86 static device_method_t a37x0_sb_periph_clk_methods[] = {
87 	DEVMETHOD(clkdev_device_unlock,		a37x0_periph_clk_device_unlock),
88 	DEVMETHOD(clkdev_device_lock,		a37x0_periph_clk_device_lock),
89 	DEVMETHOD(clkdev_read_4,		a37x0_periph_clk_read_4),
90 
91 	DEVMETHOD(device_attach,		a37x0_sb_periph_clk_attach),
92 	DEVMETHOD(device_detach,		a37x0_periph_clk_detach),
93 	DEVMETHOD(device_probe,			a37x0_sb_periph_clk_probe),
94 
95 	DEVMETHOD_END
96 };
97 
98 static driver_t a37x0_sb_periph_driver = {
99 	"a37x0_sb_periph_driver",
100 	a37x0_sb_periph_clk_methods,
101 	sizeof(struct a37x0_periph_clk_softc)
102 };
103 
104 EARLY_DRIVER_MODULE(a37x0_sb_periph, simplebus, a37x0_sb_periph_driver, 0, 0,
105     BUS_PASS_TIMER + BUS_PASS_ORDER_LATE);
106 
107 static int
108 a37x0_sb_periph_clk_attach(device_t dev)
109 {
110 	struct a37x0_periph_clk_softc *sc;
111 
112 	sc = device_get_softc(dev);
113 	sc->devices = a37x0_sb_devices;
114 	sc->device_count = SB_DEV_COUNT;
115 
116 	return (a37x0_periph_clk_attach(dev));
117 }
118 
119 static int
120 a37x0_sb_periph_clk_probe(device_t dev)
121 {
122 
123 	if (!ofw_bus_status_okay(dev))
124 		return (ENXIO);
125 
126 	if (!ofw_bus_search_compatible(dev,
127 	    a37x0_sb_periph_compat_data)->ocd_data)
128 		return (ENXIO);
129 
130 	device_set_desc(dev, "marvell,armada-3700-sb-periph-clock");
131 
132 	return (BUS_PROBE_DEFAULT);
133 }
134