1 /* $NetBSD: s3c2410.c,v 1.10 2005/12/11 12:16:51 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2003, 2005 Genetec corporation. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec corporation. 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 * 3. The name of Genetec corporation may not be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY GENETEC CORP. ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORP. 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: s3c2410.c,v 1.10 2005/12/11 12:16:51 christos Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/device.h> 38 #include <sys/kernel.h> 39 #include <sys/reboot.h> 40 41 #include <machine/cpu.h> 42 #include <machine/bus.h> 43 44 #include <arm/cpufunc.h> 45 #include <arm/mainbus/mainbus.h> 46 #include <arm/s3c2xx0/s3c2410reg.h> 47 #include <arm/s3c2xx0/s3c2410var.h> 48 49 #include "locators.h" 50 #include "opt_cpuoptions.h" 51 52 /* prototypes */ 53 static int s3c2410_match(struct device *, struct cfdata *, void *); 54 static void s3c2410_attach(struct device *, struct device *, void *); 55 static int s3c2410_search(struct device *, struct cfdata *, 56 const int *, void *); 57 58 /* attach structures */ 59 CFATTACH_DECL(ssio, sizeof(struct s3c24x0_softc), s3c2410_match, s3c2410_attach, 60 NULL, NULL); 61 62 extern struct bus_space s3c2xx0_bs_tag; 63 64 struct s3c2xx0_softc *s3c2xx0_softc; 65 66 #ifdef DEBUG_PORTF 67 volatile uint8_t *portf; /* for debug */ 68 #endif 69 70 static int 71 s3c2410_print(void *aux, const char *name) 72 { 73 struct s3c2xx0_attach_args *sa = (struct s3c2xx0_attach_args *) aux; 74 75 if (sa->sa_size) 76 aprint_normal(" addr 0x%lx", sa->sa_addr); 77 if (sa->sa_size > 1) 78 aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1); 79 if (sa->sa_intr != SSIOCF_INTR_DEFAULT) 80 aprint_normal(" intr %d", sa->sa_intr); 81 if (sa->sa_index != SSIOCF_INDEX_DEFAULT) 82 aprint_normal(" unit %d", sa->sa_index); 83 84 return (UNCONF); 85 } 86 87 int 88 s3c2410_match(struct device *parent, struct cfdata *match, void *aux) 89 { 90 return 1; 91 } 92 93 void 94 s3c2410_attach(struct device *parent, struct device *self, void *aux) 95 { 96 struct s3c24x0_softc *sc = (struct s3c24x0_softc *) self; 97 bus_space_tag_t iot; 98 const char *which_registers; /* for panic message */ 99 100 #define FAIL(which) do { \ 101 which_registers=(which); goto abort; }while(/*CONSTCOND*/0) 102 103 s3c2xx0_softc = &(sc->sc_sx); 104 sc->sc_sx.sc_iot = iot = &s3c2xx0_bs_tag; 105 106 if (bus_space_map(iot, 107 S3C2410_INTCTL_BASE, S3C2410_INTCTL_SIZE, 108 BUS_SPACE_MAP_LINEAR, &sc->sc_sx.sc_intctl_ioh)) 109 FAIL("intc"); 110 /* tell register addresses to interrupt handler */ 111 s3c2410_intr_init(sc); 112 113 /* Map the GPIO registers */ 114 if (bus_space_map(iot, S3C2410_GPIO_BASE, S3C2410_GPIO_SIZE, 115 0, &sc->sc_sx.sc_gpio_ioh)) 116 FAIL("GPIO"); 117 #ifdef DEBUG_PORTF 118 { 119 extern volatile uint8_t *portf; 120 /* make all ports output */ 121 bus_space_write_2(iot, sc->sc_sx.sc_gpio_ioh, GPIO_PCONF, 0x5555); 122 portf = (volatile uint8_t *) 123 ((char *)bus_space_vaddr(iot, sc->sc_sx.sc_gpio_ioh) + GPIO_PDATF); 124 } 125 #endif 126 127 #if 0 128 /* Map the DMA controller registers */ 129 if (bus_space_map(iot, S3C2410_DMAC_BASE, S3C2410_DMAC_SIZE, 130 0, &sc->sc_sx.sc_dmach)) 131 FAIL("DMAC"); 132 #endif 133 134 /* Memory controller */ 135 if (bus_space_map(iot, S3C2410_MEMCTL_BASE, 136 S3C24X0_MEMCTL_SIZE, 0, &sc->sc_sx.sc_memctl_ioh)) 137 FAIL("MEMC"); 138 /* Clock manager */ 139 if (bus_space_map(iot, S3C2410_CLKMAN_BASE, 140 S3C24X0_CLKMAN_SIZE, 0, &sc->sc_sx.sc_clkman_ioh)) 141 FAIL("CLK"); 142 143 #if 0 144 /* Real time clock */ 145 if (bus_space_map(iot, S3C2410_RTC_BASE, 146 S3C24X0_RTC_SIZE, 0, &sc->sc_sx.sc_rtc_ioh)) 147 FAIL("RTC"); 148 #endif 149 150 if (bus_space_map(iot, S3C2410_TIMER_BASE, 151 S3C24X0_TIMER_SIZE, 0, &sc->sc_timer_ioh)) 152 FAIL("TIMER"); 153 154 /* calculate current clock frequency */ 155 s3c24x0_clock_freq(&sc->sc_sx); 156 aprint_normal(": fclk %d MHz hclk %d MHz pclk %d MHz\n", 157 sc->sc_sx.sc_fclk / 1000000, sc->sc_sx.sc_hclk / 1000000, 158 sc->sc_sx.sc_pclk / 1000000); 159 160 aprint_naive("\n"); 161 162 /* get busdma tag for the platform */ 163 sc->sc_sx.sc_dmat = s3c2xx0_bus_dma_init(&s3c2xx0_bus_dma); 164 165 /* 166 * Attach devices. 167 */ 168 config_search_ia(s3c2410_search, self, "ssio", NULL); 169 return; 170 171 abort: 172 panic("%s: unable to map %s registers", 173 self->dv_xname, which_registers); 174 175 #undef FAIL 176 } 177 178 int 179 s3c2410_search(struct device * parent, struct cfdata * cf, 180 const int *ldesc, void *aux) 181 { 182 struct s3c24x0_softc *sc = (struct s3c24x0_softc *) parent; 183 struct s3c2xx0_attach_args aa; 184 185 aa.sa_sc = sc; 186 aa.sa_iot = sc->sc_sx.sc_iot; 187 aa.sa_addr = cf->cf_loc[SSIOCF_ADDR]; 188 aa.sa_size = cf->cf_loc[SSIOCF_SIZE]; 189 aa.sa_index = cf->cf_loc[SSIOCF_INDEX]; 190 aa.sa_intr = cf->cf_loc[SSIOCF_INTR]; 191 192 aa.sa_dmat = sc->sc_sx.sc_dmat; 193 194 if (config_match(parent, cf, &aa)) 195 config_attach(parent, cf, &aa, s3c2410_print); 196 197 return 0; 198 } 199 200 /* 201 * fill sc_pclk, sc_hclk, sc_fclk from values of clock controller register. 202 * 203 * s3c24x0_clock_freq2() is meant to be called from kernel startup routines. 204 * s3c24x0_clock_freq() is for after kernel initialization is done. 205 */ 206 void 207 s3c24x0_clock_freq2(vaddr_t clkman_base, int *fclk, int *hclk, int *pclk) 208 { 209 uint32_t pllcon, divn; 210 int mdiv, pdiv, sdiv; 211 int f, h, p; 212 213 pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_MPLLCON); 214 divn = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKDIVN); 215 216 mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT; 217 pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT; 218 sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT; 219 220 f = ((mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv)); 221 h = f; 222 if (divn & CLKDIVN_HDIVN) 223 h /= 2; 224 p = h; 225 if (divn & CLKDIVN_PDIVN) 226 p /= 2; 227 228 if (fclk) *fclk = f; 229 if (hclk) *hclk = h; 230 if (pclk) *pclk = p; 231 232 } 233 234 void 235 s3c24x0_clock_freq(struct s3c2xx0_softc *sc) 236 { 237 s3c24x0_clock_freq2( 238 (vaddr_t)bus_space_vaddr(sc->sc_iot, sc->sc_clkman_ioh), 239 &sc->sc_fclk, &sc->sc_hclk, &sc->sc_pclk); 240 } 241 242 /* 243 * Issue software reset command. 244 * called with MMU off. 245 * 246 * S3C2410 doesn't have sowtware reset bit like S3C2800. 247 * use watch dog timer and make it fire immediately. 248 */ 249 void 250 s3c2410_softreset(void) 251 { 252 disable_interrupts(I32_bit|F32_bit); 253 254 *(volatile unsigned int *)(S3C2410_WDT_BASE + WDT_WTCON) 255 = (0 << WTCON_PRESCALE_SHIFT) | WTCON_ENABLE | 256 WTCON_CLKSEL_16 | WTCON_ENRST; 257 } 258 259 260