add raggedstone fpga device support

git-svn-id: svn+ssh://en.codiert.org/home/staff/ben/dev/misc.svn/projects/fpgafs@385 766a2236-cff9-0310-b0c0-a81a5f92509a

Makefile

@@ -9,6 +9,7 @@ fpgafs-objs := files.o inode.o llmgmt.o
 # low level driver
 obj-m       += fpgafs_lldrv_dbg.o
 obj-m       += fpgafs_lldrv_cham.o
+obj-m       += fpgafs_lldrv_rag.o
 
 all :
 	$(MAKE) -C $(KERNEL_BUILDROOT) SUBDIRS=$(BUILDROOT) modules

fpgafs_lldrv_rag.c

@@ -0,0 +1,123 @@
+/*********************************************
+ * Benjamin Krill <ben@codiert.org>
+ *********************************************/
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include "fpgafs.h"
+
+#define VENDOR_ID_ALTERA 0x1172
+#define DEVICE_ID_ALTERA 0x0100
+
+static void *vaddr = 0;
+static unsigned long memstart = 0, memlen = 0;
+
+
+/* len must 2 or higher ... */
+static int fpgafs_send_data_rag(struct fpga_context *ctx, const char __user *buf, int len)
+{
+	int i;
+	for(i=0; i < len; i+=2)
+		writew((buf[i+1] << 8)|buf[i], vaddr);
+	return i;
+}
+
+/* len must 2 or higher ... */
+static int fpgafs_recv_data_rag(struct fpga_context *ctx, unsigned char *buf, int len)
+{
+	int i; unsigned short d;
+	for(i=0; i < len; i+=2) {
+		d=readw((void *)((unsigned int)vaddr | 0x20));
+		buf[i] = d & 0xff;
+		buf[i+1] = d >> 8;
+	}
+	return i;
+}
+
+int fpgafs_device_probe_rag(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	int ret;
+	ret = pci_enable_device(dev);
+	if (ret < 0) {
+		printk(KERN_WARNING "FPGAFS_RAG: unable to initialize PCI device\n");
+		return ret;
+	}
+
+	ret = pci_request_regions(dev, "FPGAFS_RAG");
+	if (ret < 0) {
+		printk(KERN_WARNING "FPGAFS_RAG: unable to reserve PCI resources\n");
+		pci_disable_device(dev);
+		return ret;
+	}
+
+	memstart = pci_resource_start(dev, 0); /* 0 for BAR0 */
+	memlen = pci_resource_len(dev, 0);
+	printk(KERN_WARNING "FPGAFS_RAG: memstart=0x%lx memlen=%li\n", memstart, memlen);
+
+	vaddr = ioremap(memstart, memlen);
+	printk(KERN_INFO "FPGAFS_RAG: device_probe successful\n");
+	return ret;
+}
+
+void fpgafs_device_remove_rag(struct pci_dev *dev)
+{
+	iounmap(vaddr);
+	pci_release_regions(dev);
+	pci_disable_device(dev);
+	printk(KERN_INFO "FPGAFS_RAG: device removed\n");
+}
+
+static struct pci_device_id  pci_device_id_fpgafs_rag[] =
+{
+	{VENDOR_ID_ALTERA, DEVICE_ID_ALTERA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{}  /* EOL */
+};
+
+struct pci_driver pci_driver_fpgafs_rag =
+{
+	name: "FPGAFS_RAG",
+	id_table: pci_device_id_fpgafs_rag,
+	probe: fpgafs_device_probe_rag,
+	remove: fpgafs_device_remove_rag
+};
+
+static int fpgafs_init_rag(void)
+{
+	printk(KERN_INFO "FPGFS_RAG: PCI init\n");
+	return pci_register_driver(&pci_driver_fpgafs_rag);
+}
+
+static int fpgafs_exit_rag(void)
+{
+	printk(KERN_INFO "FPGFS_RAG: PCI fini\n");
+	pci_unregister_driver(&pci_driver_fpgafs_rag);
+	return 0;
+}
+
+static struct fpgafs_lldrv fpgafs_lldrv_rag = {
+	.name = "rag",
+	.init = &fpgafs_init_rag,
+	.exit = &fpgafs_exit_rag,
+	.send = &fpgafs_send_data_rag,
+	.recv = &fpgafs_recv_data_rag,
+	.read_load = NULL,
+	.write_load = NULL,
+};
+
+/* init exit functions ... */
+int __init fpgafs_lldrv_rag_init(void)
+{
+	return fpgafs_register_lldrv(&fpgafs_lldrv_rag);
+}
+
+void __exit fpgafs_lldrv_rag_exit(void)
+{
+	fpgafs_unregister_lldrv(&fpgafs_lldrv_rag);
+}
+
+module_init(fpgafs_lldrv_rag_init);
+module_exit(fpgafs_lldrv_rag_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Benjamin Krill <ben@codiert.org>");