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      1 /* $NetBSD: sunxi_de2_ccu.c,v 1.8 2022/06/28 05:19:03 skrll Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2019 Jared McNeill <jmcneill (at) 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: sunxi_de2_ccu.c,v 1.8 2022/06/28 05:19:03 skrll 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/sunxi_de2_ccu.h>
     42 
     43 static int sunxi_de2_ccu_match(device_t, cfdata_t, void *);
     44 static void sunxi_de2_ccu_attach(device_t, device_t, void *);
     45 
     46 CFATTACH_DECL_NEW(sunxi_de2ccu, sizeof(struct sunxi_ccu_softc),
     47 	sunxi_de2_ccu_match, sunxi_de2_ccu_attach, NULL, NULL);
     48 
     49 static struct sunxi_ccu_reset sun8i_h3_de2_ccu_resets[] = {
     50 	SUNXI_CCU_RESET(DE2_RST_MIXER0, 0x08, 0),
     51 	SUNXI_CCU_RESET(DE2_RST_WB, 0x08, 2),
     52 };
     53 
     54 static struct sunxi_ccu_reset sun50i_a64_de2_ccu_resets[] = {
     55 	SUNXI_CCU_RESET(DE2_RST_MIXER0, 0x08, 0),
     56 	SUNXI_CCU_RESET(DE2_RST_MIXER1, 0x08, 1),
     57 	SUNXI_CCU_RESET(DE2_RST_WB, 0x08, 2),
     58 };
     59 
     60 static const char *mod_parents[] = { "mod" };
     61 
     62 static struct sunxi_ccu_clk sun8i_h3_de2_ccu_clks[] = {
     63 	SUNXI_CCU_GATE(DE2_CLK_BUS_MIXER0, "bus-mixer0", "bus", 0x04, 0),
     64 	SUNXI_CCU_GATE(DE2_CLK_BUS_MIXER1, "bus-mixer1", "bus", 0x04, 1),
     65 	SUNXI_CCU_GATE(DE2_CLK_BUS_WB, "bus-wb", "bus", 0x04, 2),
     66 
     67 	SUNXI_CCU_DIV(DE2_CLK_MIXER0_DIV, "mixer0-div", mod_parents,
     68 	    0x0c, __BITS(3,0), 0, SUNXI_CCU_DIV_SET_RATE_PARENT),
     69 	SUNXI_CCU_DIV(DE2_CLK_MIXER1_DIV, "mixer1-div", mod_parents,
     70 	    0x0c, __BITS(7,4), 0, SUNXI_CCU_DIV_SET_RATE_PARENT),
     71 	SUNXI_CCU_DIV(DE2_CLK_WB_DIV, "wb-div", mod_parents,
     72 	    0x0c, __BITS(11,8), 0, SUNXI_CCU_DIV_SET_RATE_PARENT),
     73 
     74 	SUNXI_CCU_GATE(DE2_CLK_MIXER0, "mixer0", "mixer0-div", 0x00, 0),
     75 	SUNXI_CCU_GATE(DE2_CLK_MIXER1, "mixer1", "mixer1-div", 0x00, 1),
     76 	SUNXI_CCU_GATE(DE2_CLK_WB, "wb", "wb-div", 0x00, 2),
     77 };
     78 
     79 struct sunxi_de2_ccu_config {
     80 	struct sunxi_ccu_reset	*resets;
     81 	u_int			nresets;
     82 	struct sunxi_ccu_clk	*clks;
     83 	u_int			nclks;
     84 };
     85 
     86 static const struct sunxi_de2_ccu_config sun8i_h3_de2_config = {
     87 	.resets = sun8i_h3_de2_ccu_resets,
     88 	.nresets = __arraycount(sun8i_h3_de2_ccu_resets),
     89 	.clks = sun8i_h3_de2_ccu_clks,
     90 	.nclks = __arraycount(sun8i_h3_de2_ccu_clks),
     91 };
     92 
     93 static const struct sunxi_de2_ccu_config sun50i_a64_de2_config = {
     94 	.resets = sun50i_a64_de2_ccu_resets,
     95 	.nresets = __arraycount(sun50i_a64_de2_ccu_resets),
     96 	.clks = sun8i_h3_de2_ccu_clks,
     97 	.nclks = __arraycount(sun8i_h3_de2_ccu_clks),
     98 };
     99 
    100 static const struct device_compatible_entry compat_data[] = {
    101 	{ .compat = "allwinner,sun8i-h3-de2-clk",
    102 	  .data = &sun8i_h3_de2_config },
    103 	{ .compat = "allwinner,sun8i-v3s-de2-clk",
    104 	  .data = &sun8i_h3_de2_config },
    105 	{ .compat = "allwinner,sun50i-a64-de2-clk",
    106 	  .data = &sun50i_a64_de2_config },
    107 	{ .compat = "allwinner,sun50i-h5-de2-clk",
    108 	  .data = &sun50i_a64_de2_config },
    109 
    110 	DEVICE_COMPAT_EOL
    111 };
    112 
    113 static int
    114 sunxi_de2_ccu_match(device_t parent, cfdata_t cf, void *aux)
    115 {
    116 	struct fdt_attach_args * const faa = aux;
    117 
    118 	return of_compatible_match(faa->faa_phandle, compat_data);
    119 }
    120 
    121 static void
    122 sunxi_de2_ccu_attach(device_t parent, device_t self, void *aux)
    123 {
    124 	struct sunxi_ccu_softc * const sc = device_private(self);
    125 	struct fdt_attach_args * const faa = aux;
    126 	const int phandle = faa->faa_phandle;
    127 	const struct sunxi_de2_ccu_config *conf;
    128 	struct clk *clk_bus, *clk_mod;
    129 	struct fdtbus_reset *rst;
    130 
    131 	sc->sc_dev = self;
    132 	sc->sc_phandle = phandle;
    133 	sc->sc_bst = faa->faa_bst;
    134 
    135 	conf = of_compatible_lookup(phandle, compat_data)->data;
    136 
    137 	sc->sc_resets = conf->resets;
    138 	sc->sc_nresets = conf->nresets;
    139 	sc->sc_clks = conf->clks;
    140 	sc->sc_nclks = conf->nclks;
    141 
    142 	clk_bus = fdtbus_clock_get(phandle, "bus");
    143 	if (clk_bus == NULL || clk_enable(clk_bus) != 0) {
    144 		aprint_error(": couldn't enable bus clock\n");
    145 		return;
    146 	}
    147 	clk_mod = fdtbus_clock_get(phandle, "mod");
    148 	if (clk_mod == NULL || clk_enable(clk_mod) != 0) {
    149 		aprint_error(": couldn't enable mod clock\n");
    150 		return;
    151 	}
    152 	rst = fdtbus_reset_get_index(phandle, 0);
    153 	if (rst == NULL || fdtbus_reset_deassert(rst) != 0) {
    154 		aprint_error(": couldn't de-assert reset\n");
    155 		return;
    156 	}
    157 
    158 	if (sunxi_ccu_attach(sc) != 0)
    159 		return;
    160 
    161 	aprint_naive("\n");
    162 	aprint_normal(": DE2 CCU\n");
    163 
    164 	sunxi_ccu_print(sc);
    165 }
    166