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 {"spi0", SPI0_CLK},
80 {"spi1", SPI1_CLK},
81
82 {"timer1", TIMER1_CLK},
83 {"timer2", TIMER2_CLK},
84 {"timer3", TIMER3_CLK},
85 {"timer4", TIMER4_CLK},
86 {"timer5", TIMER5_CLK},
87 {"timer6", TIMER6_CLK},
88 {"timer7", TIMER7_CLK},
89
90 {"uart1", UART1_CLK},
91 {"uart2", UART2_CLK},
92 {"uart3", UART3_CLK},
93 {"uart4", UART4_CLK},
94 {"uart5", UART5_CLK},
95 {"uart6", UART6_CLK},
96 {"uart7", UART7_CLK},
97
98 {NULL, 0}
99 };
100
101 clk_ident_t
ti_hwmods_get_clock(device_t dev)102 ti_hwmods_get_clock(device_t dev)
103 {
104 phandle_t node;
105 int len, l;
106 char *name;
107 char *buf;
108 int clk;
109 struct hwmod *hw;
110
111 if ((node = ofw_bus_get_node(dev)) == 0)
112 return (INVALID_CLK_IDENT);
113
114 if ((len = OF_getprop_alloc(node, "ti,hwmods", 1, (void**)&name)) <= 0)
115 return (INVALID_CLK_IDENT);
116
117 buf = name;
118
119 clk = INVALID_CLK_IDENT;
120 while ((len > 0) && (clk == INVALID_CLK_IDENT)) {
121 for (hw = ti_hwmods; hw->name != NULL; ++hw) {
122 if (strcmp(hw->name, name) == 0) {
123 clk = hw->clock_id;
124 break;
125 }
126 }
127
128 /* Slide to the next sub-string. */
129 l = strlen(name) + 1;
130 name += l;
131 len -= l;
132 }
133
134 if (len > 0)
135 device_printf(dev, "WARNING: more than one ti,hwmod \n");
136
137 OF_prop_free(buf);
138 return (clk);
139 }
140
ti_hwmods_contains(device_t dev,const char * hwmod)141 int ti_hwmods_contains(device_t dev, const char *hwmod)
142 {
143 phandle_t node;
144 int len, l;
145 char *name;
146 char *buf;
147 int result;
148
149 if ((node = ofw_bus_get_node(dev)) == 0)
150 return (0);
151
152 if ((len = OF_getprop_alloc(node, "ti,hwmods", 1, (void**)&name)) <= 0)
153 return (0);
154
155 buf = name;
156
157 result = 0;
158 while (len > 0) {
159 if (strcmp(name, hwmod) == 0) {
160 result = 1;
161 break;
162 }
163
164 /* Slide to the next sub-string. */
165 l = strlen(name) + 1;
166 name += l;
167 len -= l;
168 }
169
170 OF_prop_free(buf);
171
172 return (result);
173 }
174
175 int
ti_hwmods_get_unit(device_t dev,const char * hwmod)176 ti_hwmods_get_unit(device_t dev, const char *hwmod)
177 {
178 phandle_t node;
179 int l, len, hwmodlen, result;
180 char *name;
181 char *buf;
182
183 if ((node = ofw_bus_get_node(dev)) == 0)
184 return (0);
185
186 if ((len = OF_getprop_alloc(node, "ti,hwmods", 1, (void**)&name)) <= 0)
187 return (0);
188
189 buf = name;
190 hwmodlen = strlen(hwmod);
191 result = 0;
192 while (len > 0) {
193 if (strncmp(name, hwmod, hwmodlen) == 0) {
194 result = (int)strtoul(name + hwmodlen, NULL, 10);
195 break;
196 }
197 /* Slide to the next sub-string. */
198 l = strlen(name) + 1;
199 name += l;
200 len -= l;
201 }
202
203 OF_prop_free(buf);
204 return (result);
205 }
206