xscale bits, taken from NetBSD with modifications as appropriate for OpenBSD.

1 files changed, 393 insertions, 0 deletions

diff --git a/sys/arch/arm/xscale/pxa2x0.c b/sys/arch/arm/xscale/pxa2x0.c
new file mode 100644
index 00000000000..99d6dc4d569
--- /dev/null
+++ b/sys/arch/arm/xscale/pxa2x0.c
@@ -0,0 +1,393 @@
+/*	$NetBSD: pxa2x0.c,v 1.5 2003/12/12 16:42:44 thorpej Exp $ */
+
+/*
+ * Copyright (c) 2002  Genetec Corporation.  All rights reserved.
+ * Written by Hiroyuki Bessho for Genetec Corporation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed for the NetBSD Project by
+ *	Genetec Corporation.
+ * 4. The name of Genetec Corporation may not be used to endorse or 
+ *    promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GENETEC CORPORATION
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Autoconfiguration support for the Intel PXA2[15]0 application
+ * processor. This code is derived from arm/sa11x0/sa11x0.c
+ */
+
+/*-
+ * Copyright (c) 2001, The NetBSD Foundation, Inc.  All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by IWAMOTO Toshihiro and Ichiro FUKUHARA.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the NetBSD
+ *      Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ */
+/*-
+ * Copyright (c) 1999
+ *         Shin Takemura and PocketBSD Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the PocketBSD project
+ *	and its contributors.
+ * 4. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+/*
+__KERNEL_RCSID(0, "$NetBSD: pxa2x0.c,v 1.5 2003/12/12 16:42:44 thorpej Exp $");
+*/
+
+#include "pxaintc.h"
+#include "pxagpio.h"
+#if 0
+#include "pxadmac.h"	/* Not yet */
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/kernel.h>
+#include <sys/reboot.h>
+
+#include <machine/cpu.h>
+#include <machine/bus.h>
+
+#include <arm/cpufunc.h>
+#include <arm/mainbus/mainbus.h>
+#include <arm/xscale/pxa2x0reg.h>
+#include <arm/xscale/pxa2x0var.h>
+
+struct pxaip_softc {
+	struct device sc_dev;
+	bus_space_tag_t sc_bust;
+	bus_dma_tag_t sc_dmat;
+	bus_space_handle_t sc_bush_clk;
+};
+
+/* prototypes */
+static int	pxaip_match(struct device *, void *, void *);
+static void	pxaip_attach(struct device *, struct device *, void *);
+static int 	pxaip_search(struct device *, void *, void *);
+static void	pxaip_attach_critical(struct pxaip_softc *);
+static int	pxaip_print(void *, const char *);
+
+int	pxaip_measure_cpuclock(struct pxaip_softc *);
+
+/* attach structures */
+#ifdef __NetBSD__
+CFATTACH_DECL(pxaip, sizeof(struct pxaip_softc),
+    pxaip_match, pxaip_attach, NULL, NULL);
+#else
+struct cfattach pxaip_ca = {
+	sizeof(struct pxaip_softc), pxaip_match, pxaip_attach
+};
+
+struct cfdriver pxaip_cd = {
+	NULL, "pxaip", DV_DULL
+};
+#endif
+
+static struct pxaip_softc *pxaip_sc;
+
+static int
+pxaip_match(struct device *parent, void *match, void *aux)
+{
+
+	return 1;
+}
+
+static void
+pxaip_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct pxaip_softc *sc = (struct pxaip_softc *)self;
+	int cpuclock;
+
+	pxaip_sc = sc;
+	sc->sc_bust = &pxa2x0_bs_tag;
+	sc->sc_dmat = &pxa2x0_bus_dma_tag;
+
+	printf(": PXA2x0 Onchip Peripheral Bus ");
+
+	if (bus_space_map(sc->sc_bust, PXA2X0_CLKMAN_BASE, PXA2X0_CLKMAN_SIZE,
+	    0, &sc->sc_bush_clk))
+		panic("pxaip_attach: failed to map CLKMAN");
+
+	/*
+	 * Calculate clock speed
+	 * This takes 2 secs at most.
+	 */
+#if 0
+	cpuclock = pxaip_measure_cpuclock(sc) / 1000;
+#else
+	cpuclock = 398108;
+
+#endif
+	printf(" CPU clock = %d.%03d MHz\n", cpuclock/1000, cpuclock%1000 );
+
+	/*
+	 * Attach critical devices
+	 */
+	pxaip_attach_critical(sc);
+
+	/*
+	 * Attach all other devices
+	 */
+	config_search(pxaip_search, self, sc);
+
+}
+
+static int
+pxaip_search(struct device *parent, void *c, void *aux)
+{
+	struct pxaip_softc *sc = aux;
+	struct pxaip_attach_args aa;
+	struct cfdata	*cf = c;
+
+        aa.pxa_iot = sc->sc_bust;
+        aa.pxa_dmat = sc->sc_dmat;
+#if 0
+        aa.pxa_addr = cf->cf_addr;
+        aa.pxa_size = cf->cf_size;
+        aa.pxa_intr = cf->cf_intr;
+	aa.pxa_index = cf->cf_index;
+#else
+        aa.pxa_addr = (cf->cf_loc)[0];
+        aa.pxa_size = (cf->cf_loc)[1];
+        aa.pxa_intr = (cf->cf_loc)[2];
+	aa.pxa_index = (cf->cf_loc)[3];
+#endif
+
+	config_found(parent, &aa, pxaip_print);
+
+        return 0;
+}
+
+static void
+pxaip_attach_critical(struct pxaip_softc *sc)
+{
+	struct pxaip_attach_args aa;
+
+        aa.pxa_iot = sc->sc_bust;
+        aa.pxa_dmat = sc->sc_dmat;
+        aa.pxa_addr = PXA2X0_INTCTL_BASE;
+        aa.pxa_size = PXA2X0_INTCTL_SIZE;
+        aa.pxa_intr = -1;
+	if (config_found(&sc->sc_dev, &aa, pxaip_print) == NULL)
+		panic("pxaip_attach_critical: failed to attach INTC!");
+
+#if NPXAGPIO > 0
+        aa.pxa_iot = sc->sc_bust;
+        aa.pxa_dmat = sc->sc_dmat;
+        aa.pxa_addr = PXA2X0_GPIO_BASE;
+        aa.pxa_size = PXA2X0_GPIO_SIZE;
+        aa.pxa_intr = -1;
+	if (config_found(&sc->sc_dev, &aa, pxaip_print) == NULL)
+		panic("pxaip_attach_critical: failed to attach GPIO!");
+#endif
+
+#if NPXADMAC > 0
+        aa.pxa_iot = sc->sc_bust;
+        aa.pxa_dmat = sc->sc_dmat;
+        aa.pxa_addr = PXA2X0_DMAC_BASE;
+        aa.pxa_size = PXA2X0_DMAC_SIZE;
+        aa.pxa_intr = PXA2X0_INT_DMA;
+	if (config_found(&sc->sc_dev, &aa, pxaip_print) == NULL)
+		panic("pxaip_attach_critical: failed to attach DMAC!");
+#endif
+}
+
+static int
+pxaip_print(void *aux, const char *name)
+{
+	struct pxaip_attach_args *sa = (struct pxaip_attach_args*)aux;
+
+	if (sa->pxa_addr != -1) {
+                printf(" addr 0x%lx", sa->pxa_addr);
+	        if (sa->pxa_size > -1)
+	                printf("-0x%lx", sa->pxa_addr + sa->pxa_size-1);
+	}
+        if (sa->pxa_intr != -1)
+                printf(" intr %d", sa->pxa_intr);
+
+        return (UNCONF);
+}
+
+static inline uint32_t
+read_clock_counter(void)
+{
+  uint32_t x;
+  __asm __volatile("mrc	p14, 0, %0, c1, c0, 0" : "=r" (x) );
+
+  return x;
+}
+
+int
+pxaip_measure_cpuclock(struct pxaip_softc *sc)
+{
+	uint32_t rtc0, rtc1, start, end;
+	uint32_t pmcr_save;
+	bus_space_handle_t ioh;
+	int irq;
+
+	if (bus_space_map(sc->sc_bust, PXA2X0_RTC_BASE, PXA2X0_RTC_SIZE, 0,
+	    &ioh))
+		panic("pxaip_measure_cpuclock: can't map RTC");
+
+	irq = disable_interrupts(I32_bit|F32_bit);
+
+	__asm __volatile( "mrc p14, 0, %0, c0, c0, 0" : "=r" (pmcr_save) );
+	/* Enable clock counter */
+	__asm __volatile( "mcr p14, 0, %0, c0, c0, 0" : : "r" (0x0001) );
+
+	rtc0 = bus_space_read_4(sc->sc_bust, ioh, RTC_RCNR);
+	/* Wait for next second starts */
+	while ((rtc1 = bus_space_read_4(sc->sc_bust, ioh, RTC_RCNR)) == rtc0)
+		;
+	start = read_clock_counter();
+	while(rtc1 == bus_space_read_4(sc->sc_bust, ioh, RTC_RCNR))
+		;		/* Wait for 1sec */
+	end = read_clock_counter();
+
+	__asm __volatile( "mcr p14, 0, %0, c0, c0, 0" : : "r" (pmcr_save) );
+	restore_interrupts(irq);
+
+	bus_space_unmap(sc->sc_bust, ioh, PXA2X0_RTC_SIZE);
+
+	return end - start;
+}
+
+void
+pxa2x0_turbo_mode( int f )
+{
+  __asm __volatile("mcr p14, 0, %0, c6, c0, 0" : : "r" (f));
+}
+
+void
+pxa2x0_probe_sdram(vaddr_t memctl_va, paddr_t *start, paddr_t *size)
+{
+	u_int32_t mdcnfg, dwid, dcac, drac, dnb;
+	int i;
+
+	mdcnfg = *((volatile u_int32_t *)(memctl_va + MEMCTL_MDCNFG));
+
+	/*
+	 * Scan all 4 SDRAM banks
+	 */
+	for (i = 0; i < PXA2X0_SDRAM_BANKS; i++) {
+		start[i] = 0;
+		size[i] = 0;
+
+		switch (i) {
+		case 0:
+		case 1:
+			if ((i == 0 && (mdcnfg & MDCNFG_DE0) == 0) ||
+			    (i == 1 && (mdcnfg & MDCNFG_DE1) == 0))
+				continue;
+			dwid = mdcnfg >> MDCNFD_DWID01_SHIFT;
+			dcac = mdcnfg >> MDCNFD_DCAC01_SHIFT;
+			drac = mdcnfg >> MDCNFD_DRAC01_SHIFT;
+			dnb = mdcnfg >> MDCNFD_DNB01_SHIFT;
+			break;
+
+		case 2:
+		case 3:
+			if ((i == 2 && (mdcnfg & MDCNFG_DE2) == 0) ||
+			    (i == 3 && (mdcnfg & MDCNFG_DE3) == 0))
+				continue;
+			dwid = mdcnfg >> MDCNFD_DWID23_SHIFT;
+			dcac = mdcnfg >> MDCNFD_DCAC23_SHIFT;
+			drac = mdcnfg >> MDCNFD_DRAC23_SHIFT;
+			dnb = mdcnfg >> MDCNFD_DNB23_SHIFT;
+			break;
+		default:
+			panic("pxa2x0_probe_sdram: impossible");
+		}
+
+		dwid = 2 << (1 - (dwid & MDCNFD_DWID_MASK));  /* 16/32 width */
+		dcac = 1 << ((dcac & MDCNFD_DCAC_MASK) + 8);  /* 8-11 columns */
+		drac = 1 << ((drac & MDCNFD_DRAC_MASK) + 11); /* 11-13 rows */
+		dnb = 2 << (dnb & MDCNFD_DNB_MASK);	      /* # of banks */
+
+		size[i] = (paddr_t)(dwid * dcac * drac * dnb);
+		start[i] = PXA2X0_SDRAM0_START + (i * PXA2X0_SDRAM_BANK_SIZE);
+	}
+}
+
+void
+pxa2x0_clkman_config(u_int clk, int enable)
+{
+	struct pxaip_softc *sc;
+	u_int32_t rv;
+
+	KDASSERT(pxaip_sc != NULL);
+	sc = pxaip_sc;
+
+	rv = bus_space_read_4(sc->sc_bust, sc->sc_bush_clk, CLKMAN_CKEN);
+	rv &= ~clk;
+
+	if (enable)
+		rv |= clk;
+
+	bus_space_write_4(sc->sc_bust, sc->sc_bush_clk, CLKMAN_CKEN, rv);
+}