[POWERPC] Add common routines for 52xx support in arch/powerpc (6065170c) · Commits · e / devices / android_kernel_fairphone_FP5

arch/powerpc/platforms/52xx/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -2,7 +2,7 @@
		# Makefile for 52xx based boards
		#
		ifeq ($(CONFIG_PPC_MERGE),y)
		obj-y += mpc52xx_pic.o
		obj-y += mpc52xx_pic.o mpc52xx_common.o
		endif

		obj-$(CONFIG_PPC_EFIKA) += efika-setup.o efika-pci.o

arch/powerpc/platforms/52xx/mpc52xx_common.c

0 → 100644

+124 −0

Original line number	Diff line number	Diff line
		/*
		*
		* Utility functions for the Freescale MPC52xx.
		*
		* Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
		*
		* 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.
		*
		*/

		#undef DEBUG

		#include <linux/kernel.h>

		#include <asm/io.h>
		#include <asm/prom.h>
		#include <asm/of_platform.h>
		#include <asm/mpc52xx.h>


		void __iomem *
		mpc52xx_find_and_map(const char *compatible)
		{
		struct device_node *ofn;
		const u32 *regaddr_p;
		u64 regaddr64, size64;

		ofn = of_find_compatible_node(NULL, NULL, compatible);
		if (!ofn)
		return NULL;

		regaddr_p = of_get_address(ofn, 0, &size64, NULL);
		if (!regaddr_p) {
		of_node_put(ofn);
		return NULL;
		}

		regaddr64 = of_translate_address(ofn, regaddr_p);

		of_node_put(ofn);

		return ioremap((u32)regaddr64, (u32)size64);
		}


		/**
		* mpc52xx_find_ipb_freq - Find the IPB bus frequency for a device
		* @node: device node
		*
		* Returns IPB bus frequency, or 0 if the bus frequency cannot be found.
		*/
		unsigned int
		mpc52xx_find_ipb_freq(struct device_node *node)
		{
		struct device_node *np;
		const unsigned int *p_ipb_freq = NULL;

		of_node_get(node);
		while (node) {
		p_ipb_freq = get_property(node, "bus-frequency", NULL);
		if (p_ipb_freq)
		break;

		np = of_get_parent(node);
		of_node_put(node);
		node = np;
		}
		if (node)
		of_node_put(node);

		return p_ipb_freq ? *p_ipb_freq : 0;
		}


		void __init
		mpc52xx_setup_cpu(void)
		{
		struct mpc52xx_cdm __iomem *cdm;
		struct mpc52xx_xlb __iomem *xlb;

		/* Map zones */
		cdm = mpc52xx_find_and_map("mpc52xx-cdm");
		xlb = mpc52xx_find_and_map("mpc52xx-xlb");

		if (!cdm \|\| !xlb) {
		printk(KERN_ERR __FILE__ ": "
		"Error while mapping CDM/XLB during mpc52xx_setup_cpu. "
		"Expect some abnormal behavior\n");
		goto unmap_regs;
		}

		/* Use internal 48 Mhz */
		out_8(&cdm->ext_48mhz_en, 0x00);
		out_8(&cdm->fd_enable, 0x01);
		if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
		out_be16(&cdm->fd_counters, 0x0001);
		else
		out_be16(&cdm->fd_counters, 0x5555);

		/* Configure the XLB Arbiter priorities */
		out_be32(&xlb->master_pri_enable, 0xff);
		out_be32(&xlb->master_priority, 0x11111111);

		/* Disable XLB pipelining */
		/* (cfr errate 292. We could do this only just before ATA PIO
		transaction and re-enable it afterwards ...) */
		out_be32(&xlb->config, in_be32(&xlb->config) \| MPC52xx_XLB_CFG_PLDIS);

		/* Unmap zones */
		unmap_regs:
		if (cdm) iounmap(cdm);
		if (xlb) iounmap(xlb);
		}

		static int __init
		mpc52xx_declare_of_platform_devices(void)
		{
		/* Find every child of the SOC node and add it to of_platform */
		return of_platform_bus_probe(NULL, NULL, NULL);
		}

		device_initcall(mpc52xx_declare_of_platform_devices);

arch/powerpc/platforms/52xx/mpc52xx_pic.c

+22 −88

Original line number	Diff line number	Diff line
		@@ -379,81 +379,21 @@ static struct irq_host_ops mpc52xx_irqhost_ops = {

		void __init mpc52xx_init_irq(void)
		{
		struct device_node *picnode = NULL;
		int picnode_regsize;
		u32 picnode_regoffset;

		struct device_node *sdmanode = NULL;
		int sdmanode_regsize;
		u32 sdmanode_regoffset;

		u64 size64;
		int flags;

		u32 intr_ctrl;

		picnode = of_find_compatible_node(NULL, "interrupt-controller",
		"mpc5200-pic");
		if (picnode == NULL) {
		printk(KERN_ERR "MPC52xx PIC: "
		"Unable to find the interrupt controller "
		"in the OpenFirmware device tree\n");
		goto end;
		}

		sdmanode = of_find_compatible_node(NULL, "dma-controller",
		"mpc5200-bestcomm");
		if (sdmanode == NULL) {
		printk(KERN_ERR "MPC52xx PIC"
		"Unable to find the Bestcomm DMA controller device "
		"in the OpenFirmware device tree\n");
		goto end;
		}

		/* Retrieve PIC ressources */
		picnode_regoffset = (u32) of_get_address(picnode, 0, &size64, &flags);
		if (picnode_regoffset == 0) {
		printk(KERN_ERR "MPC52xx PIC"
		"Unable to get the interrupt controller address\n");
		goto end;
		}

		picnode_regoffset =
		of_translate_address(picnode, (u32 *) picnode_regoffset);
		picnode_regsize = (int)size64;

		/* Retrieve SDMA ressources */
		sdmanode_regoffset = (u32) of_get_address(sdmanode, 0, &size64, &flags);
		if (sdmanode_regoffset == 0) {
		printk(KERN_ERR "MPC52xx PIC: "
		"Unable to get the Bestcomm DMA controller address\n");
		goto end;
		}

		sdmanode_regoffset =
		of_translate_address(sdmanode, (u32 *) sdmanode_regoffset);
		sdmanode_regsize = (int)size64;
		struct device_node *picnode;

		/* Remap the necessary zones */
		intr = ioremap(picnode_regoffset, picnode_regsize);
		if (intr == NULL) {
		printk(KERN_ERR "MPC52xx PIC: "
		"Unable to ioremap interrupt controller registers!\n");
		goto end;
		}
		picnode = of_find_compatible_node(NULL, NULL, "mpc52xx-pic");

		sdma = ioremap(sdmanode_regoffset, sdmanode_regsize);
		if (sdma == NULL) {
		iounmap(intr);
		printk(KERN_ERR "MPC52xx PIC: "
		"Unable to ioremap Bestcomm DMA registers!\n");
		goto end;
		}
		intr = mpc52xx_find_and_map("mpc52xx-pic");
		if (!intr)
		panic(__FILE__ ": find_and_map failed on 'mpc52xx-pic'. "
		"Check node !");

		printk(KERN_INFO "MPC52xx PIC: MPC52xx PIC Remapped at 0x%8.8x\n",
		picnode_regoffset);
		printk(KERN_INFO "MPC52xx PIC: MPC52xx SDMA Remapped at 0x%8.8x\n",
		sdmanode_regoffset);
		sdma = mpc52xx_find_and_map("mpc52xx-bestcomm");
		if (!sdma)
		panic(__FILE__ ": find_and_map failed on 'mpc52xx-bestcomm'. "
		"Check node !");

		/* Disable all interrupt sources. */
		out_be32(&sdma->IntPend, 0xffffffff); /* 1 means clear pending */
		@@ -480,21 +420,15 @@ void __init mpc52xx_init_irq(void)
		* hw irq information provided by the ofw to linux virq
		*/

		mpc52xx_irqhost =
		irq_alloc_host(IRQ_HOST_MAP_LINEAR, MPC52xx_IRQ_HIGHTESTHWIRQ,
		mpc52xx_irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR,
		MPC52xx_IRQ_HIGHTESTHWIRQ,
		&mpc52xx_irqhost_ops, -1);

		if (mpc52xx_irqhost) {
		if (!mpc52xx_irqhost)
		panic(__FILE__ ": Cannot allocate the IRQ host\n");

		mpc52xx_irqhost->host_data = picnode;
		printk(KERN_INFO "MPC52xx PIC is up and running!\n");
		} else {
		printk(KERN_ERR
		"MPC52xx PIC: Unable to allocate the IRQ host\n");
		}

		end:
		of_node_put(picnode);
		of_node_put(sdmanode);
		}

		/*
		@@ -526,14 +460,14 @@ unsigned int mpc52xx_get_irq(void)
		irq = ffs(status) - 1;
		irq \|= (MPC52xx_IRQ_L1_SDMA << MPC52xx_IRQ_L1_OFFSET) &
		MPC52xx_IRQ_L1_MASK;
		} else
		} else {
		irq \|= (MPC52xx_IRQ_L1_PERP << MPC52xx_IRQ_L1_OFFSET) &
		MPC52xx_IRQ_L1_MASK;
		}
		}

		pr_debug("%s: irq=%x. virq=%d\n", __func__, irq,
		irq_linear_revmap(mpc52xx_irqhost, irq));

		return irq_linear_revmap(mpc52xx_irqhost, irq);
		}

include/asm-powerpc/mpc52xx.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -241,6 +241,10 @@ struct mpc52xx_cdm {

		#ifndef __ASSEMBLY__

		extern void __iomem * mpc52xx_find_and_map(const char *);
		extern unsigned int mpc52xx_find_ipb_freq(struct device_node *node);
		extern void mpc52xx_setup_cpu(void);

		extern void mpc52xx_init_irq(void);
		extern unsigned int mpc52xx_get_irq(void);