1 /* $NetBSD: s3c2800.c,v 1.16 2021/08/07 16:18:45 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 Fujitsu Component Limited 5 * Copyright (c) 2002, 2003 Genetec Corporation 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of The Fujitsu Component Limited nor the name of 17 * Genetec corporation may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC 21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC 25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: s3c2800.c,v 1.16 2021/08/07 16:18:45 thorpej Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/kernel.h> 42 #include <sys/reboot.h> 43 44 #include <machine/cpu.h> 45 #include <sys/bus.h> 46 47 #include <arm/cpufunc.h> 48 #include <arm/mainbus/mainbus.h> 49 #include <arm/s3c2xx0/s3c2800reg.h> 50 #include <arm/s3c2xx0/s3c2800var.h> 51 52 #include "locators.h" 53 #include "opt_cpuoptions.h" 54 55 /* prototypes */ 56 static int s3c2800_match(device_t, cfdata_t, void *); 57 static void s3c2800_attach(device_t, device_t, void *); 58 static int s3c2800_search(device_t, cfdata_t, const int *, void *); 59 60 /* attach structures */ 61 CFATTACH_DECL_NEW(ssio, sizeof(struct s3c2800_softc), s3c2800_match, s3c2800_attach, 62 NULL, NULL); 63 64 extern struct bus_space s3c2xx0_bs_tag; 65 66 struct s3c2xx0_softc *s3c2xx0_softc; 67 68 static int 69 s3c2800_print(void *aux, const char *name) 70 { 71 struct s3c2xx0_attach_args *sa = (struct s3c2xx0_attach_args *) aux; 72 73 if (sa->sa_size) 74 aprint_normal(" addr 0x%lx", sa->sa_addr); 75 if (sa->sa_size > 1) 76 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1); 77 if (sa->sa_intr != SSIOCF_INTR_DEFAULT) 78 aprint_normal(" intr %d", sa->sa_intr); 79 if (sa->sa_index != SSIOCF_INDEX_DEFAULT) 80 aprint_normal(" unit %d", sa->sa_index); 81 82 return (UNCONF); 83 } 84 85 int 86 s3c2800_match(device_t parent, cfdata_t match, void *aux) 87 { 88 return 1; 89 } 90 91 void 92 s3c2800_attach(device_t parent, device_t self, void *aux) 93 { 94 struct s3c2800_softc *sc = device_private(self); 95 bus_space_tag_t iot; 96 const char *which_registers; /* for panic message */ 97 98 #define FAIL(which) do { \ 99 which_registers=(which); goto abort; }while(/*CONSTCOND*/0) 100 101 s3c2xx0_softc = &(sc->sc_sx); 102 sc->sc_sx.sc_iot = iot = &s3c2xx0_bs_tag; 103 104 if (bus_space_map(iot, 105 S3C2800_INTCTL_BASE, S3C2800_INTCTL_SIZE, 106 BUS_SPACE_MAP_LINEAR, &sc->sc_sx.sc_intctl_ioh)) 107 FAIL("intc"); 108 /* tell register addresses to interrupt handler */ 109 s3c2800_intr_init(sc); 110 111 /* Map the GPIO registers */ 112 if (bus_space_map(iot, S3C2800_GPIO_BASE, S3C2800_GPIO_SIZE, 113 0, &sc->sc_sx.sc_gpio_ioh)) 114 FAIL("GPIO"); 115 116 #if 0 117 /* Map the DMA controller registers */ 118 if (bus_space_map(iot, S3C2800_DMAC_BASE, S3C2800_DMAC_SIZE, 119 0, &sc->sc_sx.sc_dmach)) 120 FAIL("DMAC"); 121 #endif 122 123 /* Memory controller */ 124 if (bus_space_map(iot, S3C2800_MEMCTL_BASE, 125 S3C2800_MEMCTL_SIZE, 0, &sc->sc_sx.sc_memctl_ioh)) 126 FAIL("MEMC"); 127 /* Clock manager */ 128 if (bus_space_map(iot, S3C2800_CLKMAN_BASE, 129 S3C2800_CLKMAN_SIZE, 0, &sc->sc_sx.sc_clkman_ioh)) 130 FAIL("CLK"); 131 132 #if 0 133 /* Real time clock */ 134 if (bus_space_map(iot, S3C2800_RTC_BASE, 135 S3C2800_RTC_SIZE, 0, &sc->sc_sx.sc_rtc_ioh)) 136 FAIL("RTC"); 137 #endif 138 139 if (bus_space_map(iot, S3C2800_TIMER0_BASE, 140 S3C2800_TIMER_SIZE, 0, &sc->sc_tmr0_ioh)) 141 FAIL("TIMER0"); 142 143 if (bus_space_map(iot, S3C2800_TIMER1_BASE, 144 S3C2800_TIMER_SIZE, 0, &sc->sc_tmr1_ioh)) 145 FAIL("TIMER1"); 146 147 /* calculate current clock frequency */ 148 s3c2800_clock_freq(&sc->sc_sx); 149 aprint_normal(": fclk %d MHz hclk %d MHz pclk %d MHz\n", 150 sc->sc_sx.sc_fclk / 1000000, sc->sc_sx.sc_hclk / 1000000, 151 sc->sc_sx.sc_pclk / 1000000); 152 aprint_naive("\n"); 153 154 /* 155 * Attach devices. 156 */ 157 config_search(self, NULL, 158 CFARGS(.search = s3c2800_search)); 159 return; 160 161 abort: 162 panic("%s: unable to map %s registers", 163 device_xname(self), which_registers); 164 165 #undef FAIL 166 } 167 168 int 169 s3c2800_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 170 { 171 struct s3c2800_softc *sc = device_private(parent); 172 struct s3c2xx0_attach_args aa; 173 174 aa.sa_sc = sc; 175 aa.sa_iot = sc->sc_sx.sc_iot; 176 aa.sa_addr = cf->cf_loc[SSIOCF_ADDR]; 177 aa.sa_size = cf->cf_loc[SSIOCF_SIZE]; 178 aa.sa_index = cf->cf_loc[SSIOCF_INDEX]; 179 aa.sa_intr = cf->cf_loc[SSIOCF_INTR]; 180 181 if (config_probe(parent, cf, &aa)) 182 config_attach(parent, cf, &aa, s3c2800_print, CFARGS_NONE); 183 184 return 0; 185 } 186 187 /* 188 * Issue software reset command. 189 * called with MMU off. 190 */ 191 void 192 s3c2800_softreset(void) 193 { 194 *(volatile unsigned int *)(S3C2800_CLKMAN_BASE + CLKMAN_SWRCON) 195 = SWRCON_SWR; 196 } 197 198 /* 199 * fill sc_pclk, sc_hclk, sc_fclk from values of clock controller register. 200 * 201 * s3c2800_clock_freq2() is meant to be called from kernel startup routines. 202 * s3c2800_clock_freq() is for after kernel initialization is done. 203 */ 204 void 205 s3c2800_clock_freq2(vaddr_t clkman_base, int *fclk, int *hclk, int *pclk) 206 { 207 uint32_t pllcon, clkcon; 208 int mdiv, pdiv, sdiv; 209 int f, h, p; 210 211 pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_PLLCON); 212 clkcon = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKCON); 213 214 mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT; 215 pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT; 216 sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT; 217 218 f = ((mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv)); 219 h = f; 220 if (clkcon & CLKCON_HCLK) 221 h /= 2; 222 p = h; 223 if (clkcon & CLKCON_PCLK) 224 p /= 2; 225 226 if (fclk) *fclk = f; 227 if (hclk) *hclk = h; 228 if (pclk) *pclk = p; 229 } 230 231 void 232 s3c2800_clock_freq(struct s3c2xx0_softc *sc) 233 { 234 s3c2800_clock_freq2( 235 (vaddr_t)bus_space_vaddr(sc->sc_iot, sc->sc_clkman_ioh), 236 &sc->sc_fclk, &sc->sc_hclk, &sc->sc_pclk); 237 } 238 239
Indexes created Sat Sep 20 22:09:52 GMT 2025