epsoc.c revision 1.14
1 /* $NetBSD: epsoc.c,v 1.14 2021/04/24 23:36:26 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2004 Jesse Off 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: epsoc.c,v 1.14 2021/04/24 23:36:26 thorpej Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/time.h> 37 #include <sys/device.h> 38 39 #include <sys/bus.h> 40 #include <machine/intr.h> 41 42 #include <arm/cpufunc.h> 43 44 #include <arm/ep93xx/ep93xxreg.h> 45 #include <arm/ep93xx/ep93xxvar.h> 46 #include <arm/ep93xx/epsocvar.h> 47 48 #include "locators.h" 49 50 static int epsoc_match(device_t, cfdata_t, void *); 51 static void epsoc_attach(device_t, device_t, void *); 52 static int epsoc_search(device_t, cfdata_t, const int *, void *); 53 static int epsoc_print(void *, const char *); 54 static int epsoc_submatch(device_t, cfdata_t, const int *, void *); 55 56 CFATTACH_DECL_NEW(epsoc, sizeof(struct epsoc_softc), 57 epsoc_match, epsoc_attach, NULL, NULL); 58 59 struct epsoc_softc *epsoc_sc = NULL; 60 61 static int 62 epsoc_match(device_t parent, cfdata_t match, void *aux) 63 { 64 bus_space_handle_t ioh; 65 uint32_t id, ret = 0; 66 67 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_SYSCON, 68 EP93XX_APB_SYSCON_SIZE, 0, &ioh); 69 id = bus_space_read_4(&ep93xx_bs_tag, ioh, EP93XX_SYSCON_ChipID); 70 if ((id & 0x01faffff) == 0x9213) ret = 1; 71 bus_space_unmap(&ep93xx_bs_tag, ioh, EP93XX_APB_SYSCON_SIZE); 72 return ret; 73 } 74 75 static void 76 epsoc_attach(device_t parent, device_t self, void *aux) 77 { 78 struct epsoc_softc *sc; 79 uint64_t fclk, pclk, hclk; 80 uint32_t id, clkset1; 81 const char *rev; 82 int locs[EPSOCCF_NLOCS]; 83 struct epsoc_attach_args sa; 84 85 sc = device_private(self); 86 87 if (epsoc_sc == NULL) 88 epsoc_sc = sc; 89 90 sc->sc_iot = &ep93xx_bs_tag; 91 bus_space_map(sc->sc_iot, EP93XX_APB_HWBASE + EP93XX_APB_SYSCON, 92 EP93XX_APB_SYSCON_SIZE, 0, &sc->sc_ioh); 93 id = bus_space_read_4(sc->sc_iot, sc->sc_ioh, EP93XX_SYSCON_ChipID); 94 switch(id >> 28) { 95 case 0: 96 rev = "A"; 97 break; 98 case 1: 99 rev = "B"; 100 break; 101 case 2: 102 rev = "C"; 103 break; 104 case 3: 105 rev = "D0"; 106 break; 107 case 4: 108 rev = "D1"; 109 break; 110 case 5: 111 rev = "E0"; 112 break; 113 case 6: 114 rev = "E1"; 115 break; 116 default: 117 rev = ">E1"; 118 break; 119 } 120 printf(": Cirrus Logic EP93xx SoC rev %s\n", rev); 121 122 clkset1 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 123 EP93XX_SYSCON_ClkSet1); 124 { 125 int fclkdiv, hclkdiv, pclkdiv, pll1_ps; 126 int pll1x1fbd1, pll1x2fbd2, pll1x2ipd; 127 int hclkdivisors[] = {1, 2, 4, 5, 6, 8, 16, 32}; 128 129 fclkdiv = (clkset1 & 0x0e000000) >> 25; 130 hclkdiv = (clkset1 & 0x00700000) >> 20; 131 pclkdiv = (clkset1 & 0x000c0000) >> 18; 132 pll1_ps = (clkset1 & 0x00030000) >> 16; 133 pll1x1fbd1 = (clkset1 & 0x0000f800) >> 11; 134 pll1x2fbd2 = (clkset1 & 0x000007e0) >> 5; 135 pll1x2ipd = (clkset1 & 0x0000001f); 136 fclk = 14745600ULL * ((pll1x1fbd1 + 1) * (pll1x2fbd2 + 1)) / 137 ((pll1x2ipd + 1) * (1 << pll1_ps)); 138 hclk = fclk / hclkdivisors[hclkdiv]; 139 pclk = hclk >> pclkdiv; 140 if (fclkdiv > 4) fclkdiv = 0; 141 if (clkset1 & 0x00800000) /* nBYP1 bypasses PLL */ 142 fclk = fclk >> fclkdiv; 143 else 144 fclk = 14745600ULL; 145 } 146 printf("%s: fclk %lld.%02lld MHz hclk %lld.%02lld MHz pclk %lld.%02lld MHz\n", 147 device_xname(self), 148 fclk / 1000000, (fclk % 1000000 + 5000) / 10000, 149 hclk / 1000000, (hclk % 1000000 + 5000) / 10000, 150 pclk / 1000000, (pclk % 1000000 + 5000) / 10000); 151 152 sc->sc_fclk = fclk; 153 sc->sc_hclk = hclk; 154 sc->sc_pclk = pclk; 155 156 /* get busdma tag for the platform */ 157 sc->sc_dmat = ep93xx_bus_dma_init(&ep93xx_bus_dma); 158 159 /* 160 * Attach each devices 161 * some device is used by other system device. so attach first. 162 */ 163 sa.sa_iot = sc->sc_iot; 164 sa.sa_dmat = sc->sc_dmat; 165 sa.sa_hclk = sc->sc_hclk; 166 sa.sa_pclk = sc->sc_pclk; 167 locs[EPSOCCF_ADDR] = EP93XX_APB_HWBASE + EP93XX_APB_TIMERS; 168 config_found(self, &sa, epsoc_print, 169 CFARG_SUBMATCH, epsoc_submatch, 170 CFARG_LOCATORS, locs, 171 CFARG_EOL); 172 173 locs[EPSOCCF_ADDR] = EP93XX_APB_HWBASE + EP93XX_APB_GPIO; 174 sa.sa_gpio = device_private( 175 config_found(self, &sa, epsoc_print, 176 CFARG_SUBMATCH, epsoc_submatch, 177 CFARG_LOCATORS, locs, 178 CFARG_EOL)); 179 180 config_search(self, &sa, 181 CFARG_SEARCH, epsoc_search, 182 CFARG_EOL); 183 } 184 185 int 186 epsoc_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 187 { 188 struct epsoc_attach_args *sa = aux; 189 190 if (cf->cf_loc[EPSOCCF_ADDR] == ldesc[EPSOCCF_ADDR]) { 191 sa->sa_addr = cf->cf_loc[EPSOCCF_ADDR]; 192 sa->sa_size = cf->cf_loc[EPSOCCF_SIZE]; 193 sa->sa_intr = cf->cf_loc[EPSOCCF_INTR]; 194 return (config_match(parent, cf, aux)); 195 } else 196 return (0); 197 } 198 199 int 200 epsoc_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 201 { 202 struct epsoc_attach_args *sa = aux; 203 204 sa->sa_addr = cf->cf_loc[EPSOCCF_ADDR]; 205 sa->sa_size = cf->cf_loc[EPSOCCF_SIZE]; 206 sa->sa_intr = cf->cf_loc[EPSOCCF_INTR]; 207 208 if (config_probe(parent, cf, aux)) 209 config_attach(parent, cf, aux, epsoc_print, CFARG_EOL); 210 211 return (0); 212 } 213 214 static int 215 epsoc_print(void *aux, const char *name) 216 { 217 struct epsoc_attach_args *sa = aux; 218 219 if (sa->sa_size) 220 aprint_normal(" addr 0x%lx", sa->sa_addr); 221 if (sa->sa_size > 1) 222 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1); 223 if (sa->sa_intr > 1) 224 aprint_normal(" intr %d", sa->sa_intr); 225 226 return (UNCONF); 227 } 228
Indexes created Mon Sep 22 10:09:38 GMT 2025