Author: andrew
Date: Wed Mar 25 10:59:42 2015
New Revision: 280558
URL: https://svnweb.freebsd.org/changeset/base/280558
Log:
Add support for the Raspberry Pi 2. As the chip is based on the bcm2835 in
the Raspberry Pi B we support most of the devices are already supported,
however the base address has changed.
A few items are not working, or missing. The main ones are:
* DMA doesn't work in the sdhci driver.
* Enabling vchiq halts the boot, may be interrupt related.
* There is no U-Boot port yet so the DTB is embedded in the kernel.
The last point will make it difficult to boot FreeBSD, however there is
support for the Raspberry Pi 2 in the U-Boot git repo. As I have not tested
this it is left as an open task to create a port to build.
X-MFC: When the above issues are fixed
Sponsored by: ABT Systems Ltd
Added:
head/sys/arm/broadcom/bcm2835/bcm2836.c (contents, props changed)
head/sys/arm/broadcom/bcm2835/bcm2836.h (contents, props changed)
head/sys/arm/broadcom/bcm2835/files.bcm2836 (contents, props changed)
head/sys/arm/broadcom/bcm2835/std.bcm2836 (contents, props changed)
head/sys/arm/conf/RPI2
- copied, changed from r280125, head/sys/arm/conf/RPI-B
Modified:
head/sys/arm/broadcom/bcm2835/bcm2835_intr.c
head/sys/arm/broadcom/bcm2835/bcm2835_machdep.c
head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c
Modified: head/sys/arm/broadcom/bcm2835/bcm2835_intr.c
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_intr.c Wed Mar 25 10:59:24
2015 (r280557)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_intr.c Wed Mar 25 10:59:42
2015 (r280558)
@@ -45,6 +45,10 @@ __FBSDID("$FreeBSD$");
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
+#ifdef SOC_BCM2836
+#include <arm/broadcom/bcm2835/bcm2836.h>
+#endif
+
#define INTC_PENDING_BASIC 0x00
#define INTC_PENDING_BANK1 0x04
#define INTC_PENDING_BANK2 0x08
@@ -61,10 +65,12 @@ __FBSDID("$FreeBSD$");
#define BANK2_START (BANK1_START + 32)
#define BANK2_END (BANK2_START + 32 - 1)
#define BANK3_START (BANK2_START + 32)
+#define BANK3_END (BANK3_START + 32 - 1)
#define IS_IRQ_BASIC(n) (((n) >= 0) && ((n) < BANK1_START))
#define IS_IRQ_BANK1(n) (((n) >= BANK1_START) && ((n) <= BANK1_END))
#define IS_IRQ_BANK2(n) (((n) >= BANK2_START) && ((n) <= BANK2_END))
+#define ID_IRQ_BCM2836(n) (((n) >= BANK3_START) && ((n) <= BANK3_END))
#define IRQ_BANK1(n) ((n) - BANK1_START)
#define IRQ_BANK2(n) ((n) - BANK2_START)
@@ -148,11 +154,19 @@ arm_get_next_irq(int last_irq)
struct bcm_intc_softc *sc = bcm_intc_sc;
uint32_t pending;
int32_t irq = last_irq + 1;
+#ifdef SOC_BCM2836
+ int ret;
+#endif
/* Sanity check */
if (irq < 0)
irq = 0;
+#ifdef SOC_BCM2836
+ if ((ret = bcm2836_get_next_irq(irq)) >= 0)
+ return (ret + BANK3_START);
+#endif
+
/* TODO: should we mask last_irq? */
if (irq < BANK1_START) {
pending = intc_read_4(sc, INTC_PENDING_BASIC);
@@ -197,6 +211,10 @@ arm_mask_irq(uintptr_t nb)
intc_write_4(sc, INTC_DISABLE_BANK1, (1 << IRQ_BANK1(nb)));
else if (IS_IRQ_BANK2(nb))
intc_write_4(sc, INTC_DISABLE_BANK2, (1 << IRQ_BANK2(nb)));
+#ifdef SOC_BCM2836
+ else if (ID_IRQ_BCM2836(nb))
+ bcm2836_mask_irq(nb - BANK3_START);
+#endif
else
printf("arm_mask_irq: Invalid IRQ number: %d\n", nb);
}
@@ -213,6 +231,10 @@ arm_unmask_irq(uintptr_t nb)
intc_write_4(sc, INTC_ENABLE_BANK1, (1 << IRQ_BANK1(nb)));
else if (IS_IRQ_BANK2(nb))
intc_write_4(sc, INTC_ENABLE_BANK2, (1 << IRQ_BANK2(nb)));
+#ifdef SOC_BCM2836
+ else if (ID_IRQ_BCM2836(nb))
+ bcm2836_unmask_irq(nb - BANK3_START);
+#endif
else
printf("arm_mask_irq: Invalid IRQ number: %d\n", nb);
}
Modified: head/sys/arm/broadcom/bcm2835/bcm2835_machdep.c
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_machdep.c Wed Mar 25 10:59:24
2015 (r280557)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_machdep.c Wed Mar 25 10:59:42
2015 (r280558)
@@ -88,6 +88,7 @@ bcm2835_late_init(platform_t plat)
}
}
+#ifdef SOC_BCM2835
/*
* Set up static device mappings.
* All on-chip peripherals exist in a 16MB range starting at 0x20000000.
@@ -100,6 +101,17 @@ bcm2835_devmap_init(platform_t plat)
arm_devmap_add_entry(0x20000000, 0x01000000);
return (0);
}
+#endif
+
+#ifdef SOC_BCM2836
+static int
+bcm2836_devmap_init(platform_t plat)
+{
+
+ arm_devmap_add_entry(0x3f000000, 0x01000000);
+ return (0);
+}
+#endif
struct arm32_dma_range *
bus_dma_get_range(void)
@@ -121,6 +133,8 @@ cpu_reset()
bcmwd_watchdog_reset();
while (1);
}
+
+#ifdef SOC_BCM2835
static platform_method_t bcm2835_methods[] = {
PLATFORMMETHOD(platform_devmap_init, bcm2835_devmap_init),
PLATFORMMETHOD(platform_lastaddr, bcm2835_lastaddr),
@@ -128,6 +142,16 @@ static platform_method_t bcm2835_methods
PLATFORMMETHOD_END,
};
-
FDT_PLATFORM_DEF(bcm2835, "bcm2835", 0, "raspberrypi,model-b");
+#endif
+
+#ifdef SOC_BCM2836
+static platform_method_t bcm2836_methods[] = {
+ PLATFORMMETHOD(platform_devmap_init, bcm2836_devmap_init),
+ PLATFORMMETHOD(platform_lastaddr, bcm2835_lastaddr),
+ PLATFORMMETHOD(platform_late_init, bcm2835_late_init),
+ PLATFORMMETHOD_END,
+};
+FDT_PLATFORM_DEF(bcm2836, "bcm2836", 0, "brcm,bcm2709");
+#endif
Modified: head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c Wed Mar 25 10:59:24
2015 (r280557)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_sdhci.c Wed Mar 25 10:59:42
2015 (r280558)
@@ -68,8 +68,16 @@ __FBSDID("$FreeBSD$");
#define dprintf(fmt, args...)
#endif
+/* DMA doesn't yet work with the bcm3826 */
+#ifdef SOC_BCM2836
+#define PIO_MODE 1
+#else
+#define PIO_MODE 0
+#error
+#endif
+
static int bcm2835_sdhci_hs = 1;
-static int bcm2835_sdhci_pio_mode = 0;
+static int bcm2835_sdhci_pio_mode = PIO_MODE;
TUNABLE_INT("hw.bcm2835.sdhci.hs", &bcm2835_sdhci_hs);
TUNABLE_INT("hw.bcm2835.sdhci.pio_mode", &bcm2835_sdhci_pio_mode);
Added: head/sys/arm/broadcom/bcm2835/bcm2836.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/broadcom/bcm2835/bcm2836.c Wed Mar 25 10:59:42 2015
(r280558)
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2015 Andrew Turner.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/ofw_bus.h>
+
+#include <arm/broadcom/bcm2835/bcm2836.h>
+
+#define ARM_LOCAL_BASE 0x40000000
+#define ARM_LOCAL_SIZE 0x00001000
+
+#define ARM_LOCAL_CONTROL 0x00
+#define ARM_LOCAL_PRESCALER 0x08
+#define PRESCALER_19_2 0x80000000 /* 19.2 MHz */
+#define ARM_LOCAL_INT_TIMER(n) (0x40 + (n) * 4)
+#define ARM_LOCAL_INT_MAILBOX(n) (0x50 + (n) * 4)
+#define ARM_LOCAL_INT_PENDING(n) (0x60 + (n) * 4)
+#define INT_PENDING_MASK 0x0f
+
+/*
+ * A driver for features of the bcm2836.
+ */
+
+struct bcm2836_softc {
+ device_t sc_dev;
+ struct resource *sc_mem;
+};
+
+static device_identify_t bcm2836_identify;
+static device_probe_t bcm2836_probe;
+static device_attach_t bcm2836_attach;
+
+struct bcm2836_softc *softc;
+
+static void
+bcm2836_identify(driver_t *driver, device_t parent)
+{
+
+ if (BUS_ADD_CHILD(parent, 0, "bcm2836", -1) == NULL)
+ device_printf(parent, "add child failed\n");
+}
+
+static int
+bcm2836_probe(device_t dev)
+{
+
+ if (softc != NULL)
+ return (ENXIO);
+
+ device_set_desc(dev, "Broadcom bcm2836");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+bcm2836_attach(device_t dev)
+{
+ int i, rid;
+
+ softc = device_get_softc(dev);
+ softc->sc_dev = dev;
+
+ rid = 0;
+ softc->sc_mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
+ ARM_LOCAL_BASE, ARM_LOCAL_BASE + ARM_LOCAL_SIZE, ARM_LOCAL_SIZE,
+ RF_ACTIVE);
+ if (softc->sc_mem == NULL) {
+ device_printf(dev, "could not allocate memory resource\n");
+ return (ENXIO);
+ }
+
+ bus_write_4(softc->sc_mem, ARM_LOCAL_CONTROL, 0);
+ bus_write_4(softc->sc_mem, ARM_LOCAL_PRESCALER, PRESCALER_19_2);
+
+ for (i = 0; i < 4; i++)
+ bus_write_4(softc->sc_mem, ARM_LOCAL_INT_TIMER(i), 0);
+
+ for (i = 0; i < 4; i++)
+ bus_write_4(softc->sc_mem, ARM_LOCAL_INT_MAILBOX(i), 1);
+
+ return (0);
+}
+
+int
+bcm2836_get_next_irq(int last_irq)
+{
+ uint32_t reg;
+ int cpu;
+ int irq;
+
+ cpu = PCPU_GET(cpuid);
+
+ reg = bus_read_4(softc->sc_mem, ARM_LOCAL_INT_PENDING(cpu));
+ reg &= INT_PENDING_MASK;
+ if (reg == 0)
+ return (-1);
+
+ irq = ffs(reg) - 1;
+
+ return (irq);
+}
+
+void
+bcm2836_mask_irq(uintptr_t irq)
+{
+ uint32_t reg;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ reg = bus_read_4(softc->sc_mem, ARM_LOCAL_INT_TIMER(i));
+ reg &= ~(1 << irq);
+ bus_write_4(softc->sc_mem, ARM_LOCAL_INT_TIMER(i), reg);
+ }
+}
+
+void
+bcm2836_unmask_irq(uintptr_t irq)
+{
+ uint32_t reg;
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ reg = bus_read_4(softc->sc_mem, ARM_LOCAL_INT_TIMER(i));
+ reg |= (1 << irq);
+ bus_write_4(softc->sc_mem, ARM_LOCAL_INT_TIMER(i), reg);
+ }
+}
+
+static device_method_t bcm2836_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_identify, bcm2836_identify),
+ DEVMETHOD(device_probe, bcm2836_probe),
+ DEVMETHOD(device_attach, bcm2836_attach),
+
+ DEVMETHOD_END
+};
+
+static devclass_t bcm2836_devclass;
+
+static driver_t bcm2836_driver = {
+ "bcm2836",
+ bcm2836_methods,
+ sizeof(struct bcm2836_softc),
+};
+
+EARLY_DRIVER_MODULE(bcm2836, nexus, bcm2836_driver, bcm2836_devclass, 0, 0,
+ BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
Added: head/sys/arm/broadcom/bcm2835/bcm2836.h
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/broadcom/bcm2835/bcm2836.h Wed Mar 25 10:59:42 2015
(r280558)
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 Andrew Turner.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _BCM2815_BCM2836_H
+#define _BCM2815_BCM2836_H
+
+int bcm2836_get_next_irq(int);
+void bcm2836_mask_irq(uintptr_t);
+void bcm2836_unmask_irq(uintptr_t);
+
+#endif
Added: head/sys/arm/broadcom/bcm2835/files.bcm2836
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/broadcom/bcm2835/files.bcm2836 Wed Mar 25 10:59:42 2015
(r280558)
@@ -0,0 +1,6 @@
+# $FreeBSD$
+
+arm/arm/cpufunc_asm_armv7.S standard
+arm/arm/generic_timer.c standard
+
+arm/broadcom/bcm2835/bcm2836.c standard
Added: head/sys/arm/broadcom/bcm2835/std.bcm2836
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/broadcom/bcm2835/std.bcm2836 Wed Mar 25 10:59:42 2015
(r280558)
@@ -0,0 +1,10 @@
+# $FreeBSD$
+
+machine arm armv6
+cpu CPU_CORTEXA
+makeoptions CONF_CFLAGS="-march=armv7a"
+options SOC_BCM2836
+
+files "../broadcom/bcm2835/files.bcm2836"
+files "../broadcom/bcm2835/files.bcm283x"
+
Copied and modified: head/sys/arm/conf/RPI2 (from r280125,
head/sys/arm/conf/RPI-B)
==============================================================================
--- head/sys/arm/conf/RPI-B Sun Mar 15 21:57:44 2015 (r280125, copy
source)
+++ head/sys/arm/conf/RPI2 Wed Mar 25 10:59:42 2015 (r280558)
@@ -21,6 +21,7 @@
ident RPI-B
include "../broadcom/bcm2835/std.rpi"
+include "../broadcom/bcm2835/std.bcm2836"
options HZ=100
options SCHED_4BSD # 4BSD scheduler
@@ -80,7 +81,7 @@ options INVARIANT_SUPPORT # Extra sanit
#options BOOTP_NFSV3
#options BOOTP_WIRED_TO=ue0
-#options ROOTDEVNAME=\"ufs:mmcsd0s2\"
+options ROOTDEVNAME=\"ufs:mmcsd0s2\"
device bpf
device loop
@@ -129,13 +130,13 @@ device smsc
device spibus
device bcm2835_spi
-device vchiq
-device sound
+#device vchiq
+#device sound
# Flattened Device Tree
options FDT # Configure using FDT/DTB data
# Note: DTB is normally loaded and modified by RPi boot loader, then
# handed to kernel via U-Boot and ubldr.
-#options FDT_DTB_STATIC
-#makeoptions FDT_DTS_FILE=rpi.dts
+options FDT_DTB_STATIC
+makeoptions FDT_DTS_FILE=rpi2.dts
makeoptions MODULES_EXTRA=dtb/rpi
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