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
48struct hwmod {
49	const char	*name;
50	int		clock_id;
51};
52
53struct 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
101clk_ident_t
102ti_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
141int 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
175int
176ti_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