[ubicom32]: move new files out from platform support patch

[openwrt.git] / target / linux / ubicom32 / files / arch / ubicom32 / mach-common / ring_tio.c

diff --git a/target/linux/ubicom32/files/arch/ubicom32/mach-common/ring_tio.c b/target/linux/ubicom32/files/arch/ubicom32/mach-common/ring_tio.c
new file mode 100644 (file)
index 0000000..9d0f8cd
--- /dev/null
+++ b/target/linux/ubicom32/files/arch/ubicom32/mach-common/ring_tio.c
@@ -0,0 +1,123 @@
+/*
+ * arch/ubicom32/mach-common/ring_tio.c
+ *   Generic initialization for UIO Ubicom32 Ring
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port 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.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/types.h>
+
+#include <asm/devtree.h>
+#include <asm/ring_tio.h>
+
+static const char *ring_tio_driver_name = "uio_ubicom32ring";
+
+/*
+ * The number of ring_tio's currently allocated, used for .id
+ */
+static int __initdata ring_tio_count;
+
+/*
+ * The maximum number of resources that the ring_tio will have.
+ * Currently 3, a register space, and up to 2 interrupts.
+ */
+#define RING_TIO_MAX_RESOURCES 3
+
+/*
+ * ring_tio_init
+ *     Checks the device tree and instantiates the driver if found
+ */
+void __init ring_tio_init(const char *node_name)
+{
+       struct platform_device *pdev;
+       struct resource *res;
+       int resource_idx = 0;
+       struct ring_tio_node *ring_node;
+
+       /*
+        * Check the device tree for the ring_tio
+        */
+       ring_node = (struct ring_tio_node *)devtree_find_node(node_name);
+       if (!ring_node) {
+               printk(KERN_WARNING "Ring TIO '%s' not found\n", node_name);
+               return;
+       }
+
+       if (ring_node->version != RING_TIO_NODE_VERSION) {
+               printk(KERN_WARNING "ring_tio not compatible\n");
+               return;
+       }
+
+       /*
+        * Dynamically create the platform_device structure and resources
+        */
+       pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
+       if (!pdev) {
+               printk(KERN_WARNING "ring_tio could not alloc pdev\n");
+               return;
+       }
+
+       res = kzalloc(sizeof(struct resource) * RING_TIO_MAX_RESOURCES,
+                       GFP_KERNEL);
+       if (!res) {
+               kfree(pdev);
+               printk(KERN_WARNING "ring_tio could not alloc res\n");
+               return;
+       }
+
+       pdev->name = ring_tio_driver_name;
+       pdev->id = ring_tio_count++;
+       pdev->resource = res;
+
+       /*
+        * Fill in the resources and platform data from devtree information
+        */
+       res[resource_idx].start = (u32_t)(ring_node->regs);
+       res[resource_idx].end = (u32_t)(ring_node->regs);
+       res[resource_idx].flags = IORESOURCE_MEM;
+       resource_idx++;
+
+       if (ring_node->dn.sendirq != 0xFF) {
+               res[resource_idx].start = ring_node->dn.sendirq;
+               res[resource_idx].flags = IORESOURCE_IRQ;
+               resource_idx++;
+       }
+
+       if (ring_node->dn.recvirq != 0xFF) {
+               res[resource_idx].start = ring_node->dn.recvirq;
+               res[resource_idx].flags = IORESOURCE_IRQ;
+               resource_idx++;
+       }
+       pdev->num_resources = resource_idx;
+
+       printk(KERN_INFO "RingTIO.%d '%s' found irq=%d/%d regs=%p pdev=%p/%p\n",
+               ring_tio_count - 1, node_name, ring_node->dn.sendirq,
+               ring_node->dn.recvirq, ring_node->regs, pdev, res);
+
+       /*
+        * Try to get the device registered
+        */
+       pdev->dev.platform_data = (void *)node_name;
+       if (platform_device_register(pdev) < 0) {
+               printk(KERN_WARNING "Ring failed to register\n");
+               kfree(pdev);
+               kfree(res);
+       }
+}