s3c2440.c revision 1.2
1 /*- 2 * Copyright (c) 2012 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Paul Fleischer <paul (at) xpg.dk> 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 /* Derived from s3c2410.c */ 31 /* 32 * Copyright (c) 2003, 2005 Genetec corporation. All rights reserved. 33 * Written by Hiroyuki Bessho for Genetec corporation. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. The name of Genetec corporation may not be used to endorse 44 * or promote products derived from this software without specific prior 45 * written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 49 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 50 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORP. 51 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 57 * POSSIBILITY OF SUCH DAMAGE. 58 */ 59 60 #include <sys/cdefs.h> 61 __KERNEL_RCSID(0, "$NetBSD: s3c2440.c,v 1.2 2012/10/27 17:17:40 chs Exp $"); 62 63 #include <sys/param.h> 64 #include <sys/systm.h> 65 #include <sys/device.h> 66 #include <sys/kernel.h> 67 #include <sys/reboot.h> 68 69 #include <machine/cpu.h> 70 #include <sys/bus.h> 71 72 #include <arm/cpufunc.h> 73 #include <arm/mainbus/mainbus.h> 74 #include <arm/s3c2xx0/s3c2440reg.h> 75 #include <arm/s3c2xx0/s3c2440var.h> 76 #include <arm/s3c2xx0/s3c2440_dma.h> 77 78 #include "locators.h" 79 #include "opt_cpuoptions.h" 80 81 /* prototypes */ 82 static int s3c2440_match(device_t, cfdata_t, void *); 83 static void s3c2440_attach(device_t, device_t, void *); 84 static int s3c2440_search(device_t, cfdata_t, const int *, void *); 85 86 /* attach structures */ 87 CFATTACH_DECL_NEW(ssio, sizeof(struct s3c24x0_softc), s3c2440_match, s3c2440_attach, 88 NULL, NULL); 89 90 extern struct bus_space s3c2xx0_bs_tag; 91 92 struct s3c2xx0_softc *s3c2xx0_softc; 93 94 #ifdef DEBUG_PORTF 95 volatile uint8_t *portf; /* for debug */ 96 #endif 97 98 static int 99 s3c2440_print(void *aux, const char *name) 100 { 101 struct s3c2xx0_attach_args *sa = (struct s3c2xx0_attach_args *) aux; 102 103 if (sa->sa_size) 104 aprint_normal(" addr 0x%lx", sa->sa_addr); 105 if (sa->sa_size > 1) 106 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1); 107 if (sa->sa_intr != SSIOCF_INTR_DEFAULT) 108 aprint_normal(" intr %d", sa->sa_intr); 109 if (sa->sa_index != SSIOCF_INDEX_DEFAULT) 110 aprint_normal(" unit %d", sa->sa_index); 111 112 return (UNCONF); 113 } 114 115 int 116 s3c2440_match(device_t parent, cfdata_t match, void *aux) 117 { 118 return 1; 119 } 120 121 void 122 s3c2440_attach(device_t parent, device_t self, void *aux) 123 { 124 struct s3c24x0_softc *sc = device_private(self); 125 bus_space_tag_t iot; 126 const char *which_registers; /* for panic message */ 127 128 #define FAIL(which) do { \ 129 which_registers=(which); goto abort; }while(/*CONSTCOND*/0) 130 131 s3c2xx0_softc = &(sc->sc_sx); 132 sc->sc_sx.sc_iot = iot = &s3c2xx0_bs_tag; 133 134 if (bus_space_map(iot, 135 S3C2440_INTCTL_BASE, S3C2440_INTCTL_SIZE, 136 BUS_SPACE_MAP_LINEAR, &sc->sc_sx.sc_intctl_ioh)) 137 FAIL("intc"); 138 /* tell register addresses to interrupt handler */ 139 s3c2440_intr_init(sc); 140 141 /* Map the GPIO registers */ 142 if (bus_space_map(iot, S3C2440_GPIO_BASE, S3C2440_GPIO_SIZE, 143 0, &sc->sc_sx.sc_gpio_ioh)) 144 FAIL("GPIO"); 145 #ifdef DEBUG_PORTF 146 { 147 extern volatile uint8_t *portf; 148 /* make all ports output */ 149 bus_space_write_2(iot, sc->sc_sx.sc_gpio_ioh, GPIO_PCONF, 0x5555); 150 portf = (volatile uint8_t *) 151 ((char *)bus_space_vaddr(iot, sc->sc_sx.sc_gpio_ioh) + GPIO_PDATF); 152 } 153 #endif 154 155 #if 1 156 /* Map the DMA controller registers */ 157 if (bus_space_map(iot, S3C2440_DMAC_BASE, S3C2440_DMAC_SIZE, 158 0, &sc->sc_sx.sc_dmach)) 159 FAIL("DMAC"); 160 #endif 161 162 /* Memory controller */ 163 if (bus_space_map(iot, S3C2440_MEMCTL_BASE, 164 S3C24X0_MEMCTL_SIZE, 0, &sc->sc_sx.sc_memctl_ioh)) 165 FAIL("MEMC"); 166 /* Clock manager */ 167 if (bus_space_map(iot, S3C2440_CLKMAN_BASE, 168 S3C24X0_CLKMAN_SIZE, 0, &sc->sc_sx.sc_clkman_ioh)) 169 FAIL("CLK"); 170 171 #if 0 172 /* Real time clock */ 173 if (bus_space_map(iot, S3C2410_RTC_BASE, 174 S3C24X0_RTC_SIZE, 0, &sc->sc_sx.sc_rtc_ioh)) 175 FAIL("RTC"); 176 #endif 177 178 if (bus_space_map(iot, S3C2440_TIMER_BASE, 179 S3C24X0_TIMER_SIZE, 0, &sc->sc_timer_ioh)) { 180 FAIL("TIMER"); 181 } 182 183 /* calculate current clock frequency */ 184 s3c24x0_clock_freq(&sc->sc_sx); 185 aprint_normal(": fclk %d MHz hclk %d MHz pclk %d MHz\n", 186 sc->sc_sx.sc_fclk / 1000000, sc->sc_sx.sc_hclk / 1000000, 187 sc->sc_sx.sc_pclk / 1000000); 188 189 aprint_naive("\n"); 190 191 /* get busdma tag for the platform */ 192 sc->sc_sx.sc_dmat = s3c2xx0_bus_dma_init(&s3c2xx0_bus_dma); 193 194 s3c2440_dma_init(); 195 196 /* 197 * Attach devices. 198 */ 199 config_search_ia(s3c2440_search, self, "ssio", NULL); 200 return; 201 202 abort: 203 panic("%s: unable to map %s registers", 204 device_xname(self), which_registers); 205 206 #undef FAIL 207 } 208 209 int 210 s3c2440_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 211 { 212 struct s3c24x0_softc *sc = device_private(parent); 213 struct s3c2xx0_attach_args aa; 214 215 aa.sa_sc = sc; 216 aa.sa_iot = sc->sc_sx.sc_iot; 217 aa.sa_addr = cf->cf_loc[SSIOCF_ADDR]; 218 aa.sa_size = cf->cf_loc[SSIOCF_SIZE]; 219 aa.sa_index = cf->cf_loc[SSIOCF_INDEX]; 220 aa.sa_intr = cf->cf_loc[SSIOCF_INTR]; 221 222 aa.sa_dmat = sc->sc_sx.sc_dmat; 223 224 if (config_match(parent, cf, &aa)) 225 config_attach(parent, cf, &aa, s3c2440_print); 226 227 return 0; 228 } 229 230 /* 231 * fill sc_pclk, sc_hclk, sc_fclk from values of clock controller register. 232 * 233 * s3c24x0_clock_freq2() is meant to be called from kernel startup routines. 234 * s3c24x0_clock_freq() is for after kernel initialization is done. 235 */ 236 void 237 s3c24x0_clock_freq2(vaddr_t clkman_base, int *fclk, int *hclk, int *pclk) 238 { 239 uint32_t pllcon, divn, camdivn; 240 int mdiv, pdiv, sdiv; 241 uint32_t f, h, p; 242 243 pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_MPLLCON); 244 divn = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKDIVN); 245 camdivn = *(volatile uint32_t *)(clkman_base + CLKMAN_CAMDIVN); 246 247 mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT; 248 pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT; 249 sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT; 250 251 f = ((mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv)) * 2; 252 h = f; 253 254 /* HDIVN of CLKDIVN can have 4 distinct values */ 255 switch( (divn & CLKDIVN_HDIVN_MASK) >> CLKDIVN_HDIVN_SHIFT ) 256 { 257 case 0: 258 /* 00b: HCLK = FCLK/1*/ 259 break; 260 case 1: 261 /* 01b: HCLK = FCLK/2*/ 262 h /= 2; 263 break; 264 case 2: 265 /* 10b: HCLK = FCLK/4 when CAMDIVN[9] (HCLK4_HALF) = 0 266 * HCLK = FCLK/8 when CAMDIVN[9] (HCLK4_HALF) = 1 */ 267 if( camdivn & CLKCAMDIVN_HCLK4_HALF ) 268 h /= 8; 269 else 270 h /= 4; 271 break; 272 case 3: 273 /* 11b: HCLK = FCLK/3 when CAMDIVN[8] (HCLK3_HALF) = 0 274 * HCLK = FCLK/6 when CAMDIVN[8] (HCLK3_HALF) = 1 */ 275 if( camdivn & CLKCAMDIVN_HCLK3_HALF ) 276 h /= 6; 277 else 278 h /= 3; 279 break; 280 } 281 282 p = h; 283 284 if (divn & CLKDIVN_PDIVN) 285 p /= 2; 286 287 if (fclk) *fclk = f; 288 if (hclk) *hclk = h; 289 if (pclk) *pclk = p; 290 291 } 292 293 void 294 s3c24x0_clock_freq(struct s3c2xx0_softc *sc) 295 { 296 s3c24x0_clock_freq2( 297 (vaddr_t)bus_space_vaddr(sc->sc_iot, sc->sc_clkman_ioh), 298 &sc->sc_fclk, &sc->sc_hclk, &sc->sc_pclk); 299 } 300 301 /* 302 * Issue software reset command. 303 * called with MMU off. 304 * 305 * S3C2410 doesn't have sowtware reset bit like S3C2800. 306 * use watch dog timer and make it fire immediately. 307 */ 308 void 309 s3c2440_softreset(void) 310 { 311 disable_interrupts(I32_bit|F32_bit); 312 313 *(volatile unsigned int *)(S3C2440_WDT_BASE + WDT_WTCON) 314 = (0 << WTCON_PRESCALE_SHIFT) | WTCON_ENABLE | 315 WTCON_CLKSEL_16 | WTCON_ENRST; 316 } 317 318 319
Indexes created Mon Sep 29 21:09:56 GMT 2025