1 /*-
2 * Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@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 ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/kernel.h>
36
37 #include <dev/fdt/fdt_common.h>
38 #include <dev/ofw/openfirm.h>
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41
42 #include <machine/bus.h>
43 #include <machine/fdt.h>
44
45 #include <arm/ti/ti_prcm.h>
46 #include <arm/ti/ti_hwmods.h>
47
48 struct hwmod {
49 const char *name;
50 int clock_id;
51 };
52
53 struct hwmod ti_hwmods[] = {
54 {"i2c1", I2C1_CLK},
55 {"i2c2", I2C2_CLK},
56 {"i2c3", I2C3_CLK},
57 {"i2c4", I2C4_CLK},
58 {"i2c5", I2C5_CLK},
59
60 {"gpio1", GPIO1_CLK},
61 {"gpio2", GPIO2_CLK},
62 {"gpio3", GPIO3_CLK},
63 {"gpio4", GPIO4_CLK},
64 {"gpio5", GPIO5_CLK},
65 {"gpio6", GPIO6_CLK},
66 {"gpio7", GPIO7_CLK},
67
68 {"mmc1", MMC1_CLK},
69 {"mmc2", MMC2_CLK},
70 {"mmc3", MMC3_CLK},
71 {"mmc4", MMC4_CLK},
72 {"mmc5", MMC5_CLK},
73 {"mmc6", MMC6_CLK},
74
75 {"epwmss0", PWMSS0_CLK},
76 {"epwmss1", PWMSS1_CLK},
77 {"epwmss2", PWMSS2_CLK},
78
79 {"timer1", TIMER1_CLK},
80 {"timer2", TIMER2_CLK},
81 {"timer3", TIMER3_CLK},
82 {"timer4", TIMER4_CLK},
83 {"timer5", TIMER5_CLK},
84 {"timer6", TIMER6_CLK},
85 {"timer7", TIMER7_CLK},
86
87 {"uart1", UART1_CLK},
88 {"uart2", UART2_CLK},
89 {"uart3", UART3_CLK},
90 {"uart4", UART4_CLK},
91 {"uart5", UART5_CLK},
92 {"uart6", UART6_CLK},
93 {"uart7", UART7_CLK},
94
95 {NULL, 0}
96 };
97
98 clk_ident_t
ti_hwmods_get_clock(device_t dev)99 ti_hwmods_get_clock(device_t dev)
100 {
101 phandle_t node;
102 int len, l;
103 char *name;
104 char *buf;
105 int clk;
106 struct hwmod *hw;
107
108 if ((node = ofw_bus_get_node(dev)) == 0)
109 return (INVALID_CLK_IDENT);
110
111 if ((len = OF_getprop_alloc(node, "ti,hwmods", 1, (void**)&name)) <= 0)
112 return (INVALID_CLK_IDENT);
113
114 buf = name;
115
116 clk = INVALID_CLK_IDENT;
117 while ((len > 0) && (clk == INVALID_CLK_IDENT)) {
118 for (hw = ti_hwmods; hw->name != NULL; ++hw) {
119 if (strcmp(hw->name, name) == 0) {
120 clk = hw->clock_id;
121 break;
122 }
123 }
124
125 /* Slide to the next sub-string. */
126 l = strlen(name) + 1;
127 name += l;
128 len -= l;
129 }
130
131 if (len > 0)
132 device_printf(dev, "WARNING: more than one ti,hwmod \n");
133
134 free(buf, M_OFWPROP);
135 return (clk);
136 }
137
ti_hwmods_contains(device_t dev,const char * hwmod)138 int ti_hwmods_contains(device_t dev, const char *hwmod)
139 {
140 phandle_t node;
141 int len, l;
142 char *name;
143 char *buf;
144 int result;
145
146 if ((node = ofw_bus_get_node(dev)) == 0)
147 return (0);
148
149 if ((len = OF_getprop_alloc(node, "ti,hwmods", 1, (void**)&name)) <= 0)
150 return (0);
151
152 buf = name;
153
154 result = 0;
155 while (len > 0) {
156 if (strcmp(name, hwmod) == 0) {
157 result = 1;
158 break;
159 }
160
161 /* Slide to the next sub-string. */
162 l = strlen(name) + 1;
163 name += l;
164 len -= l;
165 }
166
167 free(buf, M_OFWPROP);
168
169 return (result);
170 }
171
172 int
ti_hwmods_get_unit(device_t dev,const char * hwmod)173 ti_hwmods_get_unit(device_t dev, const char *hwmod)
174 {
175 phandle_t node;
176 int l, len, hwmodlen, result;
177 char *name;
178 char *buf;
179
180 if ((node = ofw_bus_get_node(dev)) == 0)
181 return (0);
182
183 if ((len = OF_getprop_alloc(node, "ti,hwmods", 1, (void**)&name)) <= 0)
184 return (0);
185
186 buf = name;
187 hwmodlen = strlen(hwmod);
188 result = 0;
189 while (len > 0) {
190 if (strncmp(name, hwmod, hwmodlen) == 0) {
191 result = (int)strtoul(name + hwmodlen, NULL, 10);
192 break;
193 }
194 /* Slide to the next sub-string. */
195 l = strlen(name) + 1;
196 name += l;
197 len -= l;
198 }
199
200 free(buf, M_OFWPROP);
201 return (result);
202 }
203