Annotation of sys/arch/arm/s3c2xx0/s3c2800.c, Revision 1.1
1.1 ! nbrk 1: /* $NetBSD: s3c2800.c,v 1.11 2005/12/11 12:16:51 christos 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 1.11 2005/12/11 12:16:51 christos 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 <machine/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(struct device *, struct cfdata *, void *);
! 57: static void s3c2800_attach(struct device *, struct device *, void *);
! 58: static int s3c2800_search(struct device *, struct cfdata *,
! 59: const int *, void *);
! 60:
! 61: /* attach structures */
! 62: CFATTACH_DECL(ssio, sizeof(struct s3c2800_softc), s3c2800_match, s3c2800_attach,
! 63: NULL, NULL);
! 64:
! 65: extern struct bus_space s3c2xx0_bs_tag;
! 66:
! 67: struct s3c2xx0_softc *s3c2xx0_softc;
! 68:
! 69: static int
! 70: s3c2800_print(void *aux, const char *name)
! 71: {
! 72: struct s3c2xx0_attach_args *sa = (struct s3c2xx0_attach_args *) aux;
! 73:
! 74: if (sa->sa_size)
! 75: aprint_normal(" addr 0x%lx", sa->sa_addr);
! 76: if (sa->sa_size > 1)
! 77: aprint_normal("-0x%lx", sa->sa_addr + sa->sa_size - 1);
! 78: if (sa->sa_intr != SSIOCF_INTR_DEFAULT)
! 79: aprint_normal(" intr %d", sa->sa_intr);
! 80: if (sa->sa_index != SSIOCF_INDEX_DEFAULT)
! 81: aprint_normal(" unit %d", sa->sa_index);
! 82:
! 83: return (UNCONF);
! 84: }
! 85:
! 86: int
! 87: s3c2800_match(struct device *parent, struct cfdata *match, void *aux)
! 88: {
! 89: return 1;
! 90: }
! 91:
! 92: void
! 93: s3c2800_attach(struct device *parent, struct device *self, void *aux)
! 94: {
! 95: struct s3c2800_softc *sc = (struct s3c2800_softc *) self;
! 96: bus_space_tag_t iot;
! 97: const char *which_registers; /* for panic message */
! 98:
! 99: #define FAIL(which) do { \
! 100: which_registers=(which); goto abort; }while(/*CONSTCOND*/0)
! 101:
! 102: s3c2xx0_softc = &(sc->sc_sx);
! 103: sc->sc_sx.sc_iot = iot = &s3c2xx0_bs_tag;
! 104:
! 105: if (bus_space_map(iot,
! 106: S3C2800_INTCTL_BASE, S3C2800_INTCTL_SIZE,
! 107: BUS_SPACE_MAP_LINEAR, &sc->sc_sx.sc_intctl_ioh))
! 108: FAIL("intc");
! 109: /* tell register addresses to interrupt handler */
! 110: s3c2800_intr_init(sc);
! 111:
! 112: /* Map the GPIO registers */
! 113: if (bus_space_map(iot, S3C2800_GPIO_BASE, S3C2800_GPIO_SIZE,
! 114: 0, &sc->sc_sx.sc_gpio_ioh))
! 115: FAIL("GPIO");
! 116:
! 117: #if 0
! 118: /* Map the DMA controller registers */
! 119: if (bus_space_map(iot, S3C2800_DMAC_BASE, S3C2800_DMAC_SIZE,
! 120: 0, &sc->sc_sx.sc_dmach))
! 121: FAIL("DMAC");
! 122: #endif
! 123:
! 124: /* Memory controller */
! 125: if (bus_space_map(iot, S3C2800_MEMCTL_BASE,
! 126: S3C2800_MEMCTL_SIZE, 0, &sc->sc_sx.sc_memctl_ioh))
! 127: FAIL("MEMC");
! 128: /* Clock manager */
! 129: if (bus_space_map(iot, S3C2800_CLKMAN_BASE,
! 130: S3C2800_CLKMAN_SIZE, 0, &sc->sc_sx.sc_clkman_ioh))
! 131: FAIL("CLK");
! 132:
! 133: #if 0
! 134: /* Real time clock */
! 135: if (bus_space_map(iot, S3C2800_RTC_BASE,
! 136: S3C2800_RTC_SIZE, 0, &sc->sc_sx.sc_rtc_ioh))
! 137: FAIL("RTC");
! 138: #endif
! 139:
! 140: if (bus_space_map(iot, S3C2800_TIMER0_BASE,
! 141: S3C2800_TIMER_SIZE, 0, &sc->sc_tmr0_ioh))
! 142: FAIL("TIMER0");
! 143:
! 144: if (bus_space_map(iot, S3C2800_TIMER1_BASE,
! 145: S3C2800_TIMER_SIZE, 0, &sc->sc_tmr1_ioh))
! 146: FAIL("TIMER1");
! 147:
! 148: /* calculate current clock frequency */
! 149: s3c2800_clock_freq(&sc->sc_sx);
! 150: aprint_normal(": fclk %d MHz hclk %d MHz pclk %d MHz\n",
! 151: sc->sc_sx.sc_fclk / 1000000, sc->sc_sx.sc_hclk / 1000000,
! 152: sc->sc_sx.sc_pclk / 1000000);
! 153: aprint_naive("\n");
! 154:
! 155: /*
! 156: * Attach devices.
! 157: */
! 158: config_search_ia(s3c2800_search, self, "ssio", NULL);
! 159: return;
! 160:
! 161: abort:
! 162: panic("%s: unable to map %s registers",
! 163: self->dv_xname, which_registers);
! 164:
! 165: #undef FAIL
! 166: }
! 167:
! 168: int
! 169: s3c2800_search(struct device * parent, struct cfdata * cf,
! 170: const int *ldesc, void *aux)
! 171: {
! 172: struct s3c2800_softc *sc = (struct s3c2800_softc *) parent;
! 173: struct s3c2xx0_attach_args aa;
! 174:
! 175: aa.sa_sc = sc;
! 176: aa.sa_iot = sc->sc_sx.sc_iot;
! 177: aa.sa_addr = cf->cf_loc[SSIOCF_ADDR];
! 178: aa.sa_size = cf->cf_loc[SSIOCF_SIZE];
! 179: aa.sa_index = cf->cf_loc[SSIOCF_INDEX];
! 180: aa.sa_intr = cf->cf_loc[SSIOCF_INTR];
! 181:
! 182: if (config_match(parent, cf, &aa))
! 183: config_attach(parent, cf, &aa, s3c2800_print);
! 184:
! 185: return 0;
! 186: }
! 187:
! 188: /*
! 189: * Issue software reset command.
! 190: * called with MMU off.
! 191: */
! 192: void
! 193: s3c2800_softreset(void)
! 194: {
! 195: *(volatile unsigned int *)(S3C2800_CLKMAN_BASE + CLKMAN_SWRCON)
! 196: = SWRCON_SWR;
! 197: }
! 198:
! 199: /*
! 200: * fill sc_pclk, sc_hclk, sc_fclk from values of clock controller register.
! 201: *
! 202: * s3c2800_clock_freq2() is meant to be called from kernel startup routines.
! 203: * s3c2800_clock_freq() is for after kernel initialization is done.
! 204: */
! 205: void
! 206: s3c2800_clock_freq2(vaddr_t clkman_base, int *fclk, int *hclk, int *pclk)
! 207: {
! 208: uint32_t pllcon, clkcon;
! 209: int mdiv, pdiv, sdiv;
! 210: int f, h, p;
! 211:
! 212: pllcon = *(volatile uint32_t *)(clkman_base + CLKMAN_PLLCON);
! 213: clkcon = *(volatile uint32_t *)(clkman_base + CLKMAN_CLKCON);
! 214:
! 215: mdiv = (pllcon & PLLCON_MDIV_MASK) >> PLLCON_MDIV_SHIFT;
! 216: pdiv = (pllcon & PLLCON_PDIV_MASK) >> PLLCON_PDIV_SHIFT;
! 217: sdiv = (pllcon & PLLCON_SDIV_MASK) >> PLLCON_SDIV_SHIFT;
! 218:
! 219: f = ((mdiv + 8) * S3C2XX0_XTAL_CLK) / ((pdiv + 2) * (1 << sdiv));
! 220: h = f;
! 221: if (clkcon & CLKCON_HCLK)
! 222: h /= 2;
! 223: p = h;
! 224: if (clkcon & CLKCON_PCLK)
! 225: p /= 2;
! 226:
! 227: if (fclk) *fclk = f;
! 228: if (hclk) *hclk = h;
! 229: if (pclk) *pclk = p;
! 230: }
! 231:
! 232: void
! 233: s3c2800_clock_freq(struct s3c2xx0_softc *sc)
! 234: {
! 235: s3c2800_clock_freq2(
! 236: (vaddr_t)bus_space_vaddr(sc->sc_iot, sc->sc_clkman_ioh),
! 237: &sc->sc_fclk, &sc->sc_hclk, &sc->sc_pclk);
! 238: }
! 239:
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