1 /* $NetBSD: sun8i_h3_r_ccu.c,v 1.2 2021/01/27 03:10:20 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30
31 __KERNEL_RCSID(1, "$NetBSD: sun8i_h3_r_ccu.c,v 1.2 2021/01/27 03:10:20 thorpej Exp $");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/device.h>
36 #include <sys/systm.h>
37
38 #include <dev/fdt/fdtvar.h>
39
40 #include <arm/sunxi/sunxi_ccu.h>
41 #include <arm/sunxi/sun8i_h3_r_ccu.h>
42
43 #define AR100_CFG_REG 0x00
44 #define APB0_CFG_REG 0x0c
45 #define APB0_GATE_REG 0x28
46 #define APB0_RESET_REG 0xb0
47
48 static int sun8i_h3_r_ccu_match(device_t, cfdata_t, void *);
49 static void sun8i_h3_r_ccu_attach(device_t, device_t, void *);
50
51 static const struct device_compatible_entry compat_data[] = {
52 { .compat = "allwinner,sun8i-h3-r-ccu" },
53 DEVICE_COMPAT_EOL
54 };
55
56 CFATTACH_DECL_NEW(sunxi_h3_r_ccu, sizeof(struct sunxi_ccu_softc),
57 sun8i_h3_r_ccu_match, sun8i_h3_r_ccu_attach, NULL, NULL);
58
59 static struct sunxi_ccu_reset sun8i_h3_r_ccu_resets[] = {
60 SUNXI_CCU_RESET(H3_R_RST_APB0_IR, APB0_RESET_REG, 1),
61 SUNXI_CCU_RESET(H3_R_RST_APB0_TIMER, APB0_RESET_REG, 2),
62 SUNXI_CCU_RESET(H3_R_RST_APB0_UART, APB0_RESET_REG, 4),
63 SUNXI_CCU_RESET(H3_R_RST_APB0_I2C, APB0_RESET_REG, 6),
64 };
65
66 static const char *ar100_parents[] = { "losc", "hosc", "pll_periph0", "losc" };
67 static const char *apb0_parents[] = { "ahb0" };
68
69 static struct sunxi_ccu_clk sun8i_h3_r_ccu_clks[] = {
70 SUNXI_CCU_PREDIV(H3_R_CLK_AR100, "ar100", ar100_parents,
71 AR100_CFG_REG, /* reg */
72 __BITS(12,8), /* prediv */
73 __BIT(2), /* prediv_sel */
74 __BITS(5,4), /* div */
75 __BITS(17,16), /* sel */
76 SUNXI_CCU_PREDIV_POWER_OF_TWO),
77
78 SUNXI_CCU_FIXED_FACTOR(H3_R_CLK_AHB0, "ahb0", "ar100", 1, 1),
79
80 SUNXI_CCU_DIV(H3_R_CLK_APB0, "apb0", apb0_parents,
81 APB0_CFG_REG, /* reg */
82 __BITS(1,0), /* div */
83 0, /* sel */
84 SUNXI_CCU_DIV_POWER_OF_TWO),
85
86 SUNXI_CCU_GATE(H3_R_CLK_APB0_PIO, "apb0-pio", "apb0",
87 APB0_GATE_REG, 0),
88 SUNXI_CCU_GATE(H3_R_CLK_APB0_IR, "apb0-ir", "apb0",
89 APB0_GATE_REG, 1),
90 SUNXI_CCU_GATE(H3_R_CLK_APB0_TIMER, "apb0-timer", "apb0",
91 APB0_GATE_REG, 2),
92 SUNXI_CCU_GATE(H3_R_CLK_APB0_UART, "apb0-uart", "apb0",
93 APB0_GATE_REG, 4),
94 SUNXI_CCU_GATE(H3_R_CLK_APB0_I2C, "apb0-i2c", "apb0",
95 APB0_GATE_REG, 6),
96 };
97
98 static int
sun8i_h3_r_ccu_match(device_t parent,cfdata_t cf,void * aux)99 sun8i_h3_r_ccu_match(device_t parent, cfdata_t cf, void *aux)
100 {
101 struct fdt_attach_args * const faa = aux;
102
103 return of_compatible_match(faa->faa_phandle, compat_data);
104 }
105
106 static void
sun8i_h3_r_ccu_attach(device_t parent,device_t self,void * aux)107 sun8i_h3_r_ccu_attach(device_t parent, device_t self, void *aux)
108 {
109 struct sunxi_ccu_softc * const sc = device_private(self);
110 struct fdt_attach_args * const faa = aux;
111
112 sc->sc_dev = self;
113 sc->sc_phandle = faa->faa_phandle;
114 sc->sc_bst = faa->faa_bst;
115
116 sc->sc_resets = sun8i_h3_r_ccu_resets;
117 sc->sc_nresets = __arraycount(sun8i_h3_r_ccu_resets);
118
119 sc->sc_clks = sun8i_h3_r_ccu_clks;
120 sc->sc_nclks = __arraycount(sun8i_h3_r_ccu_clks);
121
122 if (sunxi_ccu_attach(sc) != 0)
123 return;
124
125 aprint_naive("\n");
126 aprint_normal(": H3 PRCM CCU\n");
127
128 sunxi_ccu_print(sc);
129 }
130