mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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1a29ef8e97
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/*
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* arch/ubicom32/mach-common/ring_tio.c
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* Generic initialization for UIO Ubicom32 Ring
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*
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* (C) Copyright 2009, Ubicom, Inc.
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <asm/devtree.h>
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#include <asm/ring_tio.h>
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static const char *ring_tio_driver_name = "uio_ubicom32ring";
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/*
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* The number of ring_tio's currently allocated, used for .id
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*/
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static int __initdata ring_tio_count;
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/*
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* The maximum number of resources that the ring_tio will have.
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* Currently 3, a register space, and up to 2 interrupts.
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*/
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#define RING_TIO_MAX_RESOURCES 3
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/*
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* ring_tio_init
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* Checks the device tree and instantiates the driver if found
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*/
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void __init ring_tio_init(const char *node_name)
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{
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struct platform_device *pdev;
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struct resource *res;
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int resource_idx = 0;
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struct ring_tio_node *ring_node;
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/*
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* Check the device tree for the ring_tio
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*/
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ring_node = (struct ring_tio_node *)devtree_find_node(node_name);
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if (!ring_node) {
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printk(KERN_WARNING "Ring TIO '%s' not found\n", node_name);
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return;
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}
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if (ring_node->version != RING_TIO_NODE_VERSION) {
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printk(KERN_WARNING "ring_tio not compatible\n");
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return;
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}
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/*
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* Dynamically create the platform_device structure and resources
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*/
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pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
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if (!pdev) {
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printk(KERN_WARNING "ring_tio could not alloc pdev\n");
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return;
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}
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res = kzalloc(sizeof(struct resource) * RING_TIO_MAX_RESOURCES,
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GFP_KERNEL);
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if (!res) {
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kfree(pdev);
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printk(KERN_WARNING "ring_tio could not alloc res\n");
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return;
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}
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pdev->name = ring_tio_driver_name;
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pdev->id = ring_tio_count++;
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pdev->resource = res;
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/*
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* Fill in the resources and platform data from devtree information
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*/
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res[resource_idx].start = (u32_t)(ring_node->regs);
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res[resource_idx].end = (u32_t)(ring_node->regs);
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res[resource_idx].flags = IORESOURCE_MEM;
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resource_idx++;
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if (ring_node->dn.sendirq != 0xFF) {
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res[resource_idx].start = ring_node->dn.sendirq;
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res[resource_idx].flags = IORESOURCE_IRQ;
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resource_idx++;
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}
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if (ring_node->dn.recvirq != 0xFF) {
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res[resource_idx].start = ring_node->dn.recvirq;
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res[resource_idx].flags = IORESOURCE_IRQ;
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resource_idx++;
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}
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pdev->num_resources = resource_idx;
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printk(KERN_INFO "RingTIO.%d '%s' found irq=%d/%d regs=%p pdev=%p/%p\n",
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ring_tio_count - 1, node_name, ring_node->dn.sendirq,
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ring_node->dn.recvirq, ring_node->regs, pdev, res);
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/*
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* Try to get the device registered
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*/
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pdev->dev.platform_data = (void *)node_name;
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if (platform_device_register(pdev) < 0) {
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printk(KERN_WARNING "Ring failed to register\n");
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kfree(pdev);
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kfree(res);
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}
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}
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