[patch 11/24] rapidio: add OF-tree support to RapidIO controller driver
akpm at linux-foundation.org
akpm at linux-foundation.org
Sat Mar 29 08:21:14 EST 2008
From: Zhang Wei <wei.zhang at freescale.com>
Signed-off-by: Zhang Wei <wei.zhang at freescale.com>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
---
arch/powerpc/kernel/Makefile | 1
arch/powerpc/kernel/rio.c | 52 ---------------
arch/powerpc/sysdev/fsl_rio.c | 110 +++++++++++++++++++++++++++++---
arch/powerpc/sysdev/fsl_rio.h | 20 -----
4 files changed, 102 insertions(+), 81 deletions(-)
diff -puN arch/powerpc/kernel/Makefile~rapidio-add-of-tree-support-to-rapidio-controller-driver arch/powerpc/kernel/Makefile
--- a/arch/powerpc/kernel/Makefile~rapidio-add-of-tree-support-to-rapidio-controller-driver
+++ a/arch/powerpc/kernel/Makefile
@@ -72,7 +72,6 @@ pci64-$(CONFIG_PPC64) += pci_dn.o isa-b
obj-$(CONFIG_PCI) += pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \
pci-common.o
obj-$(CONFIG_PCI_MSI) += msi.o
-obj-$(CONFIG_RAPIDIO) += rio.o
obj-$(CONFIG_KEXEC) += machine_kexec.o crash.o \
machine_kexec_$(CONFIG_WORD_SIZE).o
obj-$(CONFIG_AUDIT) += audit.o
diff -puN arch/powerpc/kernel/rio.c~rapidio-add-of-tree-support-to-rapidio-controller-driver /dev/null
--- a/arch/powerpc/kernel/rio.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * RapidIO PPC32 support
- *
- * Copyright 2005 MontaVista Software, Inc.
- * Matt Porter <mporter at kernel.crashing.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/rio.h>
-
-#include <asm/rio.h>
-
-/**
- * platform_rio_init - Do platform specific RIO init
- *
- * Any platform specific initialization of RapdIO
- * hardware is done here as well as registration
- * of any active master ports in the system.
- */
-void __attribute__ ((weak))
- platform_rio_init(void)
-{
- printk(KERN_WARNING "RIO: No platform_rio_init() present\n");
-}
-
-/**
- * ppc_rio_init - Do PPC32 RIO init
- *
- * Calls platform-specific RIO init code and then calls
- * rio_init_mports() to initialize any master ports that
- * have been registered with the RIO subsystem.
- */
-static int __init ppc_rio_init(void)
-{
- printk(KERN_INFO "RIO: RapidIO init\n");
-
- /* Platform specific initialization */
- platform_rio_init();
-
- /* Enumerate all registered ports */
- rio_init_mports();
-
- return 0;
-}
-
-subsys_initcall(ppc_rio_init);
diff -puN arch/powerpc/sysdev/fsl_rio.c~rapidio-add-of-tree-support-to-rapidio-controller-driver arch/powerpc/sysdev/fsl_rio.c
--- a/arch/powerpc/sysdev/fsl_rio.c~rapidio-add-of-tree-support-to-rapidio-controller-driver
+++ a/arch/powerpc/sysdev/fsl_rio.c
@@ -20,6 +20,7 @@
#include <linux/interrupt.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
+#include <linux/of_platform.h>
#include <asm/io.h>
@@ -28,7 +29,6 @@
#define IRQ_RIO_TX(m) (((struct rio_priv *)(m->priv))->txirq)
#define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
-#define RIO_REGS_BASE (CCSRBAR + 0xc0000)
#define RIO_ATMU_REGS_OFFSET 0x10c00
#define RIO_MSG_REGS_OFFSET 0x11000
#define RIO_MAINT_WIN_SIZE 0x400000
@@ -905,19 +905,66 @@ __setup("riohdid=", fsl_rio_get_cmdline)
/**
* fsl_rio_setup - Setup MPC85xx RapidIO interface
- * @law_start: Starting physical address of RapidIO LAW
- * @law_size: Size of RapidIO LAW
+ * @fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
*
* Initializes MPC85xx RapidIO hardware interface, configures
* master port with system-specific info, and registers the
* master port with the RapidIO subsystem.
*/
-void fsl_rio_setup(int law_start, int law_size)
+int fsl_rio_setup(struct of_device *dev)
{
struct rio_ops *ops;
struct rio_mport *port;
- struct rio_priv *priv = NULL;
- int rc;
+ struct rio_priv *priv;
+ int rc = 0;
+ const u32 *dt_range, *cell;
+ struct resource regs;
+ int rlen;
+ u64 law_start, law_size;
+ int paw, aw, sw;
+
+ if (!dev->node) {
+ dev_err(&dev->dev, "Device OF-Node is NULL");
+ return -EFAULT;
+ }
+
+ rc = of_address_to_resource(dev->node, 0, ®s);
+ if (rc) {
+ dev_err(&dev->dev, "Can't get %s property 'reg'\n",
+ dev->node->full_name);
+ return -EFAULT;
+ }
+ dev_info(&dev->dev, "Of-device full name %s\n", dev->node->full_name);
+ dev_info(&dev->dev, "Regs start 0x%08x size 0x%08x\n", regs.start,
+ regs.end - regs.start + 1);
+
+ dt_range = of_get_property(dev->node, "ranges", &rlen);
+ if (!dt_range) {
+ dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
+ dev->node->full_name);
+ return -EFAULT;
+ }
+
+ /* Get node address wide */
+ cell = of_get_property(dev->node, "#address-cells", NULL);
+ if (cell)
+ aw = *cell;
+ else
+ aw = of_n_addr_cells(dev->node);
+ /* Get node size wide */
+ cell = of_get_property(dev->node, "#size-cells", NULL);
+ if (cell)
+ sw = *cell;
+ else
+ sw = of_n_size_cells(dev->node);
+ /* Get parent address wide wide */
+ paw = of_n_addr_cells(dev->node);
+
+ law_start = of_read_number(dt_range + aw, paw);
+ law_size = of_read_number(dt_range + aw + paw, sw);
+
+ dev_info(&dev->dev, "LAW start 0x%016llx, size 0x%016llx.\n",
+ law_start, law_size);
ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
ops->lcread = fsl_local_config_read;
@@ -942,6 +989,12 @@ void fsl_rio_setup(int law_start, int la
port->iores.end = law_start + law_size;
port->iores.flags = IORESOURCE_MEM;
+ priv->bellirq = irq_of_parse_and_map(dev->node, 2);
+ priv->txirq = irq_of_parse_and_map(dev->node, 3);
+ priv->rxirq = irq_of_parse_and_map(dev->node, 4);
+ dev_info(&dev->dev, "bellirq: %d, txirq: %d, rxirq %d\n", priv->bellirq,
+ priv->txirq, priv->rxirq);
+
rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
@@ -953,7 +1006,7 @@ void fsl_rio_setup(int law_start, int la
port->priv = priv;
rio_register_mport(port);
- priv->regs_win = ioremap(RIO_REGS_BASE, 0x20000);
+ priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
+ RIO_ATMU_REGS_OFFSET);
priv->maint_atmu_regs = priv->atmu_regs + 1;
@@ -972,10 +1025,51 @@ void fsl_rio_setup(int law_start, int la
out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);
fsl_rio_doorbell_init(port);
- return;
+ return 0;
err:
if (priv)
iounmap(priv->regs_win);
+ kfree(ops);
kfree(priv);
kfree(port);
+ return rc;
+}
+
+/* The probe function for RapidIO peer-to-peer network.
+ */
+static int __devinit fsl_of_rio_rpn_probe(struct of_device *dev,
+ const struct of_device_id *match)
+{
+ int rc;
+ printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
+ dev->node->full_name);
+
+ rc = fsl_rio_setup(dev);
+ if (rc)
+ goto out;
+
+ /* Enumerate all registered ports */
+ rc = rio_init_mports();
+out:
+ return rc;
+};
+
+static const struct of_device_id fsl_of_rio_rpn_ids[] = {
+ {
+ .compatible = "fsl,rapidio-delta",
+ },
+ {},
+};
+
+static struct of_platform_driver fsl_of_rio_rpn_driver = {
+ .name = "fsl-of-rio",
+ .match_table = fsl_of_rio_rpn_ids,
+ .probe = fsl_of_rio_rpn_probe,
+};
+
+static __init int fsl_of_rio_rpn_init(void)
+{
+ return of_register_platform_driver(&fsl_of_rio_rpn_driver);
}
+
+subsys_initcall(fsl_of_rio_rpn_init);
diff -puN arch/powerpc/sysdev/fsl_rio.h~rapidio-add-of-tree-support-to-rapidio-controller-driver /dev/null
--- a/arch/powerpc/sysdev/fsl_rio.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * MPC85xx RapidIO definitions
- *
- * Copyright 2005 MontaVista Software, Inc.
- * Matt Porter <mporter at kernel.crashing.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#ifndef __PPC_SYSLIB_PPC85XX_RIO_H
-#define __PPC_SYSLIB_PPC85XX_RIO_H
-
-#include <linux/init.h>
-
-extern void mpc85xx_rio_setup(int law_start, int law_size);
-
-#endif /* __PPC_SYSLIB_PPC85XX_RIO_H */
_
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