powerpc/85xx: Introduce support for the Freescale P1022DS reference board

Introduce basic support for the Freescale P1022DS reference board, based on the
Freescale BSP for this board.  This patch excludes the DIU, SSI, and MMC/SD
drivers.  Only a 36-bit DTS is provided.

Update mpc86xx_smp_defconfig and mpc85xx_defconfig to support the P1022DS.
This means enabling 64-bit physical address support, increasing the maximum
zone order to 12 (to allow the DIU driver to allocate large chunks), and
clean up the audio options to disable the deprecated OSS support.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

3 files changed, 157 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig
index 3a2ade2e443..bea1f5905ad 100644
--- a/arch/powerpc/platforms/85xx/Kconfig
+++ b/arch/powerpc/platforms/85xx/Kconfig
@@ -65,6 +65,14 @@ config MPC85xx_RDB
 	help
 	  This option enables support for the MPC85xx RDB (P2020 RDB) board
 
+config P1022_DS
+	bool "Freescale P1022 DS"
+	select DEFAULT_UIMAGE
+	select CONFIG_PHYS_64BIT	# The DTS has 36-bit addresses
+	select SWIOTLB
+	help
+	  This option enables support for the Freescale P1022DS reference board.
+
 config SOCRATES
 	bool "Socrates"
 	select DEFAULT_UIMAGE
diff --git a/arch/powerpc/platforms/85xx/Makefile b/arch/powerpc/platforms/85xx/Makefile
index 387c128f2c8..a2ec3f8f4d0 100644
--- a/arch/powerpc/platforms/85xx/Makefile
+++ b/arch/powerpc/platforms/85xx/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_MPC8536_DS)  += mpc8536_ds.o
 obj-$(CONFIG_MPC85xx_DS)  += mpc85xx_ds.o
 obj-$(CONFIG_MPC85xx_MDS) += mpc85xx_mds.o
 obj-$(CONFIG_MPC85xx_RDB) += mpc85xx_rdb.o
+obj-$(CONFIG_P1022_DS)    += p1022_ds.o
 obj-$(CONFIG_P4080_DS)    += p4080_ds.o corenet_ds.o
 obj-$(CONFIG_STX_GP3)	  += stx_gp3.o
 obj-$(CONFIG_TQM85xx)	  += tqm85xx.o
diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c
new file mode 100644
index 00000000000..e1467c93745
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/p1022_ds.c
@@ -0,0 +1,148 @@
+/*
+ * P1022DS board specific routines
+ *
+ * Authors: Travis Wheatley <travis.wheatley@freescale.com>
+ *          Dave Liu <daveliu@freescale.com>
+ *          Timur Tabi <timur@freescale.com>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * This file is taken from the Freescale P1022DS BSP, with modifications:
+ * 1) No DIU support (pending rewrite of DIU code)
+ * 2) No AMP support
+ * 3) No PCI endpoint support
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/pci.h>
+#include <linux/of_platform.h>
+#include <linux/lmb.h>
+
+#include <asm/mpic.h>
+#include <asm/swiotlb.h>
+
+#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
+
+void __init p1022_ds_pic_init(void)
+{
+	struct mpic *mpic;
+	struct resource r;
+	struct device_node *np;
+
+	np = of_find_node_by_type(NULL, "open-pic");
+	if (!np) {
+		pr_err("Could not find open-pic node\n");
+		return;
+	}
+
+	if (of_address_to_resource(np, 0, &r)) {
+		pr_err("Failed to map mpic register space\n");
+		of_node_put(np);
+		return;
+	}
+
+	mpic = mpic_alloc(np, r.start,
+		MPIC_PRIMARY | MPIC_WANTS_RESET |
+		MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+		MPIC_SINGLE_DEST_CPU,
+		0, 256, " OpenPIC  ");
+
+	BUG_ON(mpic == NULL);
+	of_node_put(np);
+
+	mpic_init(mpic);
+}
+
+#ifdef CONFIG_SMP
+void __init mpc85xx_smp_init(void);
+#endif
+
+/*
+ * Setup the architecture
+ */
+static void __init p1022_ds_setup_arch(void)
+{
+#ifdef CONFIG_PCI
+	struct device_node *np;
+#endif
+	dma_addr_t max = 0xffffffff;
+
+	if (ppc_md.progress)
+		ppc_md.progress("p1022_ds_setup_arch()", 0);
+
+#ifdef CONFIG_PCI
+	for_each_compatible_node(np, "pci", "fsl,p1022-pcie") {
+		struct resource rsrc;
+		struct pci_controller *hose;
+
+		of_address_to_resource(np, 0, &rsrc);
+
+		if ((rsrc.start & 0xfffff) == 0x8000)
+			fsl_add_bridge(np, 1);
+		else
+			fsl_add_bridge(np, 0);
+
+		hose = pci_find_hose_for_OF_device(np);
+		max = min(max, hose->dma_window_base_cur +
+			  hose->dma_window_size);
+	}
+#endif
+
+#ifdef CONFIG_SMP
+	mpc85xx_smp_init();
+#endif
+
+#ifdef CONFIG_SWIOTLB
+	if (lmb_end_of_DRAM() > max) {
+		ppc_swiotlb_enable = 1;
+		set_pci_dma_ops(&swiotlb_dma_ops);
+		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
+	}
+#endif
+
+	pr_info("Freescale P1022 DS reference board\n");
+}
+
+static struct of_device_id __initdata p1022_ds_ids[] = {
+	{ .type = "soc", },
+	{ .compatible = "soc", },
+	{ .compatible = "simple-bus", },
+	{ .compatible = "gianfar", },
+	{},
+};
+
+static int __init p1022_ds_publish_devices(void)
+{
+	return of_platform_bus_probe(NULL, p1022_ds_ids, NULL);
+}
+machine_device_initcall(p1022_ds, p1022_ds_publish_devices);
+
+machine_arch_initcall(p1022_ds, swiotlb_setup_bus_notifier);
+
+/*
+ * Called very early, device-tree isn't unflattened
+ */
+static int __init p1022_ds_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	return of_flat_dt_is_compatible(root, "fsl,p1022ds");
+}
+
+define_machine(p1022_ds) {
+	.name			= "P1022 DS",
+	.probe			= p1022_ds_probe,
+	.setup_arch		= p1022_ds_setup_arch,
+	.init_IRQ		= p1022_ds_pic_init,
+#ifdef CONFIG_PCI
+	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
+#endif
+	.get_irq		= mpic_get_irq,
+	.restart		= fsl_rstcr_restart,
+	.calibrate_decr		= generic_calibrate_decr,
+	.progress		= udbg_progress,
+};