powerpc/85xx: introduce support for the Freescale / iVeia P1022RDK

The Freescale / iVeia P1022RDK reference board is a small-factor board
with a Freescale P1022 SOC.  It includes:

1) 512 MB 64-bit DDR3-800 (max) memory
2) 8MB SPI serial flash memory for boot loader
3) Bootable 4-bit SD/MMC port
4) Two 10/100/1000 Ethernet connectors
5) One SATA port
6) Two USB ports
7) One PCIe x4 slot
8) DVI video connector
9) Audio input and output jacks, powered by a Wolfson WM8960 codec.

Unlike the P1022DS, the P1022RDK does not have any localbus devices,
presumably because of the localbus / DIU multiplexing restriction of
the P1022 SOC.

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

arch/powerpc/boot/dts/p1022rdk.dts

+/*
+ * P1022 RDK 32-bit Physical Address Map Device Tree Source
+ *
+ * Copyright 2012 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor "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 Freescale Semiconductor 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/ "fsl/p1022si-pre.dtsi"
+/ {
+	model = "fsl,P1022RDK";
+	compatible = "fsl,P1022RDK";
+
+	memory {
+		device_type = "memory";
+	};
+
+	board_lbc: lbc: localbus@ffe05000 {
+		/* The P1022 RDK does not have any localbus devices */
+		status = "disabled";
+	};
+
+	board_soc: soc: soc@ffe00000 {
+		ranges = <0x0 0x0 0xffe00000 0x100000>;
+
+		i2c@3100 {
+			wm8960:codec@1a {
+				compatible = "wlf,wm8960";
+				reg = <0x1a>;
+				/* MCLK source is a stand-alone oscillator */
+				clock-frequency = <12288000>;
+			};
+			rtc@68 {
+				compatible = "stm,m41t62";
+				reg = <0x68>;
+			};
+			adt7461@4c{
+				compatible = "adi,adt7461";
+				reg = <0x4c>;
+			};
+			zl6100@21{
+				compatible = "isil,zl6100";
+				reg = <0x21>;
+			};
+			zl6100@24{
+				compatible = "isil,zl6100";
+				reg = <0x24>;
+			};
+			zl6100@26{
+				compatible = "isil,zl6100";
+				reg = <0x26>;
+			};
+			zl6100@29{
+				compatible = "isil,zl6100";
+				reg = <0x29>;
+			};
+		};
+
+		spi@7000 {
+			flash@0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible = "spansion,m25p80";
+				reg = <0>;
+				spi-max-frequency = <1000000>;
+				partition@0 {
+					label = "full-spi-flash";
+					reg = <0x00000000 0x00100000>;
+				};
+			};
+		};
+
+		ssi@15000 {
+			fsl,mode = "i2s-slave";
+			codec-handle = <&wm8960>;
+		};
+
+		usb@22000 {
+			phy_type = "ulpi";
+		};
+
+		usb@23000 {
+			phy_type = "ulpi";
+		};
+
+		mdio@24000 {
+			phy0: ethernet-phy@0 {
+				interrupts = <3 1 0 0>;
+				reg = <0x1>;
+			};
+			phy1: ethernet-phy@1 {
+				interrupts = <9 1 0 0>;
+				reg = <0x2>;
+			};
+		};
+
+		mdio@25000 {
+			tbi0: tbi-phy@11 {
+				reg = <0x11>;
+				device_type = "tbi-phy";
+			};
+		};
+
+		ethernet@b0000 {
+			phy-handle = <&phy0>;
+			phy-connection-type = "rgmii-id";
+		};
+
+		ethernet@b1000 {
+			phy-handle = <&phy1>;
+			tbi-handle = <&tbi0>;
+			phy-connection-type = "sgmii";
+		};
+	};
+
+	pci0: pcie@ffe09000 {
+		ranges = <0x2000000 0x0 0xe0000000 0 0xa0000000 0x0 0x20000000
+			  0x1000000 0x0 0x00000000 0 0xffc10000 0x0 0x10000>;
+		reg = <0x0 0xffe09000 0 0x1000>;
+		pcie@0 {
+			ranges = <0x2000000 0x0 0xe0000000
+				  0x2000000 0x0 0xe0000000
+				  0x0 0x20000000
+
+				  0x1000000 0x0 0x0
+				  0x1000000 0x0 0x0
+				  0x0 0x100000>;
+		};
+	};
+
+	pci1: pcie@ffe0a000 {
+		ranges = <0x2000000 0x0 0xe0000000 0 0xc0000000 0x0 0x20000000
+			  0x1000000 0x0 0x00000000 0 0xffc20000 0x0 0x10000>;
+		reg = <0 0xffe0a000 0 0x1000>;
+		pcie@0 {
+			ranges = <0x2000000 0x0 0xe0000000
+				  0x2000000 0x0 0xe0000000
+				  0x0 0x20000000
+
+				  0x1000000 0x0 0x0
+				  0x1000000 0x0 0x0
+				  0x0 0x100000>;
+		};
+	};
+
+	pci2: pcie@ffe0b000 {
+		ranges = <0x2000000 0x0 0xe0000000 0 0x80000000 0x0 0x20000000
+			  0x1000000 0x0 0x00000000 0 0xffc00000 0x0 0x10000>;
+		reg = <0 0xffe0b000 0 0x1000>;
+		pcie@0 {
+			ranges = <0x2000000 0x0 0xe0000000
+				  0x2000000 0x0 0xe0000000
+				  0x0 0x20000000
+
+				  0x1000000 0x0 0x0
+				  0x1000000 0x0 0x0
+				  0x0 0x100000>;
+		};
+	};
+};
+
+/include/ "fsl/p1022si-post.dtsi"

arch/powerpc/configs/mpc85xx_defconfig

@@ -30,6 +30,7 @@ CONFIG_MPC85xx_DS=y
 CONFIG_MPC85xx_RDB=y
 CONFIG_P1010_RDB=y
 CONFIG_P1022_DS=y
+CONFIG_P1022_RDK=y
 CONFIG_P1023_RDS=y
 CONFIG_SOCRATES=y
 CONFIG_KSI8560=y

arch/powerpc/configs/mpc85xx_smp_defconfig

@@ -32,6 +32,7 @@ CONFIG_MPC85xx_DS=y
 CONFIG_MPC85xx_RDB=y
 CONFIG_P1010_RDB=y
 CONFIG_P1022_DS=y
+CONFIG_P1022_RDK=y
 CONFIG_P1023_RDS=y
 CONFIG_SOCRATES=y
 CONFIG_KSI8560=y

arch/powerpc/platforms/85xx/Kconfig

@@ -104,6 +104,13 @@ config P1022_DS
 	help
 	  This option enables support for the Freescale P1022DS reference board.
 
+config P1022_RDK
+	bool "Freescale / iVeia P1022 RDK"
+	select DEFAULT_UIMAGE
+	help
+	  This option enables support for the Freescale / iVeia P1022RDK
+	  reference board.
+
 config P1023_RDS
 	bool "Freescale P1023 RDS"
 	select DEFAULT_UIMAGE

arch/powerpc/platforms/85xx/Makefile

@@ -15,6 +15,7 @@ obj-$(CONFIG_MPC85xx_MDS) += mpc85xx_mds.o
 obj-$(CONFIG_MPC85xx_RDB) += mpc85xx_rdb.o
 obj-$(CONFIG_P1010_RDB)   += p1010rdb.o
 obj-$(CONFIG_P1022_DS)    += p1022_ds.o
+obj-$(CONFIG_P1022_RDK)   += p1022_rdk.o
 obj-$(CONFIG_P1023_RDS)   += p1023_rds.o
 obj-$(CONFIG_P2041_RDB)   += p2041_rdb.o corenet_ds.o
 obj-$(CONFIG_P3041_DS)    += p3041_ds.o corenet_ds.o

arch/powerpc/platforms/85xx/p1022_rdk.c

+/*
+ * P1022 RDK board specific routines
+ *
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * Based on p1022_ds.c
+ *
+ * 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/memblock.h>
+#include <asm/div64.h>
+#include <asm/mpic.h>
+#include <asm/swiotlb.h>
+
+#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
+#include <asm/udbg.h>
+#include <asm/fsl_guts.h>
+#include "smp.h"
+
+#include "mpc85xx.h"
+
+#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
+
+/* DIU Pixel Clock bits of the CLKDVDR Global Utilities register */
+#define CLKDVDR_PXCKEN		0x80000000
+#define CLKDVDR_PXCKINV		0x10000000
+#define CLKDVDR_PXCKDLY		0x06000000
+#define CLKDVDR_PXCLK_MASK	0x00FF0000
+
+/**
+ * p1022rdk_set_monitor_port: switch the output to a different monitor port
+ */
+static void p1022rdk_set_monitor_port(enum fsl_diu_monitor_port port)
+{
+	if (port != FSL_DIU_PORT_DVI) {
+		pr_err("p1022rdk: unsupported monitor port %i\n", port);
+		return;
+	}
+}
+
+/**
+ * p1022rdk_set_pixel_clock: program the DIU's clock
+ *
+ * @pixclock: the wavelength, in picoseconds, of the clock
+ */
+void p1022rdk_set_pixel_clock(unsigned int pixclock)
+{
+	struct device_node *guts_np = NULL;
+	struct ccsr_guts __iomem *guts;
+	unsigned long freq;
+	u64 temp;
+	u32 pxclk;
+
+	/* Map the global utilities registers. */
+	guts_np = of_find_compatible_node(NULL, NULL, "fsl,p1022-guts");
+	if (!guts_np) {
+		pr_err("p1022rdk: missing global utilties device node\n");
+		return;
+	}
+
+	guts = of_iomap(guts_np, 0);
+	of_node_put(guts_np);
+	if (!guts) {
+		pr_err("p1022rdk: could not map global utilties device\n");
+		return;
+	}
+
+	/* Convert pixclock from a wavelength to a frequency */
+	temp = 1000000000000ULL;
+	do_div(temp, pixclock);
+	freq = temp;
+
+	/*
+	 * 'pxclk' is the ratio of the platform clock to the pixel clock.
+	 * This number is programmed into the CLKDVDR register, and the valid
+	 * range of values is 2-255.
+	 */
+	pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq);
+	pxclk = clamp_t(u32, pxclk, 2, 255);
+
+	/* Disable the pixel clock, and set it to non-inverted and no delay */
+	clrbits32(&guts->clkdvdr,
+		  CLKDVDR_PXCKEN | CLKDVDR_PXCKDLY | CLKDVDR_PXCLK_MASK);
+
+	/* Enable the clock and set the pxclk */
+	setbits32(&guts->clkdvdr, CLKDVDR_PXCKEN | (pxclk << 16));
+
+	iounmap(guts);
+}
+
+/**
+ * p1022rdk_valid_monitor_port: set the monitor port for sysfs
+ */
+enum fsl_diu_monitor_port
+p1022rdk_valid_monitor_port(enum fsl_diu_monitor_port port)
+{
+	return FSL_DIU_PORT_DVI;
+}
+
+#endif
+
+void __init p1022_rdk_pic_init(void)
+{
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
+		MPIC_SINGLE_DEST_CPU,
+		0, 256, " OpenPIC  ");
+	BUG_ON(mpic == NULL);
+	mpic_init(mpic);
+}
+
+/*
+ * Setup the architecture
+ */
+static void __init p1022_rdk_setup_arch(void)
+{
+#ifdef CONFIG_PCI
+	struct device_node *np;
+#endif
+	dma_addr_t max = 0xffffffff;
+
+	if (ppc_md.progress)
+		ppc_md.progress("p1022_rdk_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
+
+#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
+	diu_ops.set_monitor_port	= p1022rdk_set_monitor_port;
+	diu_ops.set_pixel_clock		= p1022rdk_set_pixel_clock;
+	diu_ops.valid_monitor_port	= p1022rdk_valid_monitor_port;
+#endif
+
+	mpc85xx_smp_init();
+
+#ifdef CONFIG_SWIOTLB
+	if ((memblock_end_of_DRAM() - 1) > 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 / iVeia P1022 RDK reference board\n");
+}
+
+machine_device_initcall(p1022_rdk, mpc85xx_common_publish_devices);
+
+machine_arch_initcall(p1022_rdk, swiotlb_setup_bus_notifier);
+
+/*
+ * Called very early, device-tree isn't unflattened
+ */
+static int __init p1022_rdk_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	return of_flat_dt_is_compatible(root, "fsl,p1022rdk");
+}
+
+define_machine(p1022_rdk) {
+	.name			= "P1022 RDK",
+	.probe			= p1022_rdk_probe,
+	.setup_arch		= p1022_rdk_setup_arch,
+	.init_IRQ		= p1022_rdk_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,
+};