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[POWERPC] Add common routines for 52xx support in arch/powerpc
Adds utility routines used by 52xx device drivers and board support code. Main functionality is to add device nodes to the of_platform_bus, retrieve the IPB bus frequency, and find+ioremap device registers. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Sylvain Munaut <tnt@246tNt.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Grant Likely
Paul Mackerras
parent
e65fdfd6ca
commit
6065170cf7
4 changed files with 151 additions and 89 deletions
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@ -2,7 +2,7 @@
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# Makefile for 52xx based boards
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#
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ifeq ($(CONFIG_PPC_MERGE),y)
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obj-y += mpc52xx_pic.o
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obj-y += mpc52xx_pic.o mpc52xx_common.o
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endif
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obj-$(CONFIG_PPC_EFIKA) += efika-setup.o efika-pci.o
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124
arch/powerpc/platforms/52xx/mpc52xx_common.c
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124
arch/powerpc/platforms/52xx/mpc52xx_common.c
Normal file
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@ -0,0 +1,124 @@
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/*
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*
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* Utility functions for the Freescale MPC52xx.
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*
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* Copyright (C) 2006 Sylvain Munaut <tnt@246tNt.com>
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*
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*/
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#undef DEBUG
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#include <linux/kernel.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/of_platform.h>
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#include <asm/mpc52xx.h>
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void __iomem *
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mpc52xx_find_and_map(const char *compatible)
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{
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struct device_node *ofn;
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const u32 *regaddr_p;
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u64 regaddr64, size64;
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ofn = of_find_compatible_node(NULL, NULL, compatible);
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if (!ofn)
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return NULL;
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regaddr_p = of_get_address(ofn, 0, &size64, NULL);
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if (!regaddr_p) {
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of_node_put(ofn);
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return NULL;
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}
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regaddr64 = of_translate_address(ofn, regaddr_p);
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of_node_put(ofn);
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return ioremap((u32)regaddr64, (u32)size64);
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}
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/**
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* mpc52xx_find_ipb_freq - Find the IPB bus frequency for a device
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* @node: device node
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*
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* Returns IPB bus frequency, or 0 if the bus frequency cannot be found.
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*/
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unsigned int
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mpc52xx_find_ipb_freq(struct device_node *node)
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{
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struct device_node *np;
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const unsigned int *p_ipb_freq = NULL;
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of_node_get(node);
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while (node) {
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p_ipb_freq = get_property(node, "bus-frequency", NULL);
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if (p_ipb_freq)
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break;
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np = of_get_parent(node);
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of_node_put(node);
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node = np;
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}
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if (node)
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of_node_put(node);
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return p_ipb_freq ? *p_ipb_freq : 0;
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}
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void __init
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mpc52xx_setup_cpu(void)
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{
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struct mpc52xx_cdm __iomem *cdm;
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struct mpc52xx_xlb __iomem *xlb;
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/* Map zones */
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cdm = mpc52xx_find_and_map("mpc52xx-cdm");
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xlb = mpc52xx_find_and_map("mpc52xx-xlb");
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if (!cdm || !xlb) {
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printk(KERN_ERR __FILE__ ": "
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"Error while mapping CDM/XLB during mpc52xx_setup_cpu. "
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"Expect some abnormal behavior\n");
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goto unmap_regs;
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}
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/* Use internal 48 Mhz */
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out_8(&cdm->ext_48mhz_en, 0x00);
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out_8(&cdm->fd_enable, 0x01);
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if (in_be32(&cdm->rstcfg) & 0x40) /* Assumes 33Mhz clock */
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out_be16(&cdm->fd_counters, 0x0001);
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else
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out_be16(&cdm->fd_counters, 0x5555);
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/* Configure the XLB Arbiter priorities */
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out_be32(&xlb->master_pri_enable, 0xff);
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out_be32(&xlb->master_priority, 0x11111111);
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/* Disable XLB pipelining */
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/* (cfr errate 292. We could do this only just before ATA PIO
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transaction and re-enable it afterwards ...) */
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out_be32(&xlb->config, in_be32(&xlb->config) | MPC52xx_XLB_CFG_PLDIS);
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/* Unmap zones */
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unmap_regs:
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if (cdm) iounmap(cdm);
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if (xlb) iounmap(xlb);
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}
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static int __init
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mpc52xx_declare_of_platform_devices(void)
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{
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/* Find every child of the SOC node and add it to of_platform */
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return of_platform_bus_probe(NULL, NULL, NULL);
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}
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device_initcall(mpc52xx_declare_of_platform_devices);
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@ -54,12 +54,12 @@ static unsigned char mpc52xx_map_senses[4] = {
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*
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*/
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static inline void io_be_setbit(u32 __iomem * addr, int bitno)
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static inline void io_be_setbit(u32 __iomem *addr, int bitno)
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{
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out_be32(addr, in_be32(addr) | (1 << bitno));
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}
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static inline void io_be_clrbit(u32 __iomem * addr, int bitno)
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static inline void io_be_clrbit(u32 __iomem *addr, int bitno)
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{
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out_be32(addr, in_be32(addr) & ~(1 << bitno));
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}
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@ -104,7 +104,7 @@ static void mpc52xx_extirq_ack(unsigned int virq)
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pr_debug("%s: irq=%x. l2=%d\n", __func__, irq, l2irq);
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io_be_setbit(&intr->ctrl, 27 - l2irq);
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io_be_setbit(&intr->ctrl, 27-l2irq);
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}
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static struct irq_chip mpc52xx_extirq_irqchip = {
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@ -379,81 +379,21 @@ static struct irq_host_ops mpc52xx_irqhost_ops = {
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void __init mpc52xx_init_irq(void)
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{
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struct device_node *picnode = NULL;
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int picnode_regsize;
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u32 picnode_regoffset;
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struct device_node *sdmanode = NULL;
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int sdmanode_regsize;
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u32 sdmanode_regoffset;
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u64 size64;
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int flags;
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u32 intr_ctrl;
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picnode = of_find_compatible_node(NULL, "interrupt-controller",
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"mpc5200-pic");
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if (picnode == NULL) {
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printk(KERN_ERR "MPC52xx PIC: "
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"Unable to find the interrupt controller "
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"in the OpenFirmware device tree\n");
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goto end;
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}
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sdmanode = of_find_compatible_node(NULL, "dma-controller",
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"mpc5200-bestcomm");
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if (sdmanode == NULL) {
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printk(KERN_ERR "MPC52xx PIC"
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"Unable to find the Bestcomm DMA controller device "
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"in the OpenFirmware device tree\n");
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goto end;
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}
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/* Retrieve PIC ressources */
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picnode_regoffset = (u32) of_get_address(picnode, 0, &size64, &flags);
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if (picnode_regoffset == 0) {
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printk(KERN_ERR "MPC52xx PIC"
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"Unable to get the interrupt controller address\n");
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goto end;
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}
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picnode_regoffset =
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of_translate_address(picnode, (u32 *) picnode_regoffset);
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picnode_regsize = (int)size64;
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/* Retrieve SDMA ressources */
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sdmanode_regoffset = (u32) of_get_address(sdmanode, 0, &size64, &flags);
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if (sdmanode_regoffset == 0) {
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printk(KERN_ERR "MPC52xx PIC: "
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"Unable to get the Bestcomm DMA controller address\n");
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goto end;
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}
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sdmanode_regoffset =
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of_translate_address(sdmanode, (u32 *) sdmanode_regoffset);
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sdmanode_regsize = (int)size64;
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struct device_node *picnode;
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/* Remap the necessary zones */
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intr = ioremap(picnode_regoffset, picnode_regsize);
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if (intr == NULL) {
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printk(KERN_ERR "MPC52xx PIC: "
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"Unable to ioremap interrupt controller registers!\n");
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goto end;
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}
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picnode = of_find_compatible_node(NULL, NULL, "mpc52xx-pic");
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sdma = ioremap(sdmanode_regoffset, sdmanode_regsize);
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if (sdma == NULL) {
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iounmap(intr);
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printk(KERN_ERR "MPC52xx PIC: "
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"Unable to ioremap Bestcomm DMA registers!\n");
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goto end;
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}
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intr = mpc52xx_find_and_map("mpc52xx-pic");
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if (!intr)
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panic(__FILE__ ": find_and_map failed on 'mpc52xx-pic'. "
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"Check node !");
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printk(KERN_INFO "MPC52xx PIC: MPC52xx PIC Remapped at 0x%8.8x\n",
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picnode_regoffset);
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printk(KERN_INFO "MPC52xx PIC: MPC52xx SDMA Remapped at 0x%8.8x\n",
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sdmanode_regoffset);
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sdma = mpc52xx_find_and_map("mpc52xx-bestcomm");
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if (!sdma)
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panic(__FILE__ ": find_and_map failed on 'mpc52xx-bestcomm'. "
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"Check node !");
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/* Disable all interrupt sources. */
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out_be32(&sdma->IntPend, 0xffffffff); /* 1 means clear pending */
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@ -480,21 +420,15 @@ void __init mpc52xx_init_irq(void)
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* hw irq information provided by the ofw to linux virq
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*/
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mpc52xx_irqhost =
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irq_alloc_host(IRQ_HOST_MAP_LINEAR, MPC52xx_IRQ_HIGHTESTHWIRQ,
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&mpc52xx_irqhost_ops, -1);
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mpc52xx_irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR,
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MPC52xx_IRQ_HIGHTESTHWIRQ,
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&mpc52xx_irqhost_ops, -1);
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if (mpc52xx_irqhost) {
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mpc52xx_irqhost->host_data = picnode;
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printk(KERN_INFO "MPC52xx PIC is up and running!\n");
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} else {
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printk(KERN_ERR
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"MPC52xx PIC: Unable to allocate the IRQ host\n");
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}
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if (!mpc52xx_irqhost)
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panic(__FILE__ ": Cannot allocate the IRQ host\n");
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end:
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of_node_put(picnode);
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of_node_put(sdmanode);
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mpc52xx_irqhost->host_data = picnode;
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printk(KERN_INFO "MPC52xx PIC is up and running!\n");
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}
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/*
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@ -526,9 +460,10 @@ unsigned int mpc52xx_get_irq(void)
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irq = ffs(status) - 1;
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irq |= (MPC52xx_IRQ_L1_SDMA << MPC52xx_IRQ_L1_OFFSET) &
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MPC52xx_IRQ_L1_MASK;
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} else
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} else {
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irq |= (MPC52xx_IRQ_L1_PERP << MPC52xx_IRQ_L1_OFFSET) &
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MPC52xx_IRQ_L1_MASK;
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}
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}
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pr_debug("%s: irq=%x. virq=%d\n", __func__, irq,
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@ -536,4 +471,3 @@ unsigned int mpc52xx_get_irq(void)
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return irq_linear_revmap(mpc52xx_irqhost, irq);
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}
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@ -241,6 +241,10 @@ struct mpc52xx_cdm {
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#ifndef __ASSEMBLY__
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extern void __iomem * mpc52xx_find_and_map(const char *);
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extern unsigned int mpc52xx_find_ipb_freq(struct device_node *node);
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extern void mpc52xx_setup_cpu(void);
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extern void mpc52xx_init_irq(void);
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extern unsigned int mpc52xx_get_irq(void);
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