OPENCORES.ORG

From: cvs at opencores.org<cvs@o...>
Date: Wed Feb 7 09:22:50 CET 2007
Subject: [cvs-checkins] MODIFIED: raggedstone ...

Date: 00/07/02 07:09:22

Added: raggedstone/linuxdriver Kbuild Makefile pci_driver_7seg.c Log: add the linux device driver and userspace app Revision Changes Path 1.1 raggedstone/linuxdriver/Kbuild http://www.opencores.org/cvsweb.shtml/raggedstone/linuxdriver/Kbuild?rev=1.1&content-type=text/x-cvsweb-markup Index: Kbuild =================================================================== obj-m := mod_pci_7seg.o mod_pci_7seg-y := pci_driver_7seg.o 1.1 raggedstone/linuxdriver/Makefile http://www.opencores.org/cvsweb.shtml/raggedstone/linuxdriver/Makefile?rev=1.1&content-type=text/x-cvsweb-markup Index: Makefile =================================================================== ifneq ($(KERNELRELEASE),) include Kbuild else # Normal Makefile KERNELDIR := /lib/modules/`uname -r`/build modules:: $(MAKE) -C $(KERNELDIR) M=`pwd` $@ clean: $(MAKE) -C $(KERNELDIR) M=`pwd` $@ -rm -f Module.symvers endif install: -rmmod mod_pci_7seg sleep 1 insmod ./mod_pci_7seg.ko -mknod /dev/fpga c 100 0 1.1 raggedstone/linuxdriver/pci_driver_7seg.c http://www.opencores.org/cvsweb.shtml/raggedstone/linuxdriver/pci_driver_7seg.c?rev=1.1&content-type=text/x-cvsweb-markup Index: pci_driver_7seg.c =================================================================== /* Linux Driver for Enterpoint's Raggedstone1 FPGA PCI Board This demo driver allows access to the Board's 7segment displays. License: GPL See file "GPL" for details */ #ifndef MODULE #define MODULE #endif #include <linux/version.h> /* >= 2.6.14 LINUX_VERSION_CODE */ // #include <linux/config.h> /* needed to get LINUX_VERSION_CODE >= 2.6.13 */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/fs.h> #include <linux/ioctl.h> MODULE_AUTHOR("Manuel Bessler"); MODULE_DESCRIPTION("Raggedstone1 FPGA PCI Development Board Driver"); #ifdef MODULE_LICENSE MODULE_LICENSE("GPL"); #endif #define VENDOR_ID 0x10ee #define DEVICE_ID 0x0100 #define MAJOR_NUM 100 #define IOCTL_SETDPY _IOR(MAJOR_NUM, 0, u16) #define DEVICE_NAME "fpga" #define SUCCESS 0 unsigned long memstart = 0, memlen = 0; void * vaddr = 0; u16 lastwrite = 0; static int Device_Open = 0; int device_ioctl( struct inode *inode, struct file *file, unsigned int ioctl_num,/* The number of the ioctl */ unsigned long ioctl_param) /* The parameter to it */ { u16 display_val; printk (KERN_INFO "device_ioctl(%p,%p,ioctl_param=0x%x)\n", inode, file, (u16)ioctl_param); switch (ioctl_num) { case IOCTL_SETDPY: printk(KERN_INFO "executing IOCTL_SETDPY\n"); display_val = (u16) ioctl_param; writew(display_val, vaddr); break; } return SUCCESS; } /* This function is called whenever a process attempts * to open the device file */ static int device_open(struct inode *inode, struct file *file) { printk ("device_open(%p)\n", file); /* We don't want to talk to two processes at the * same time */ if (Device_Open) return -EBUSY; Device_Open++; //#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) // MOD_INC_USE_COUNT; //#endif return SUCCESS; } #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) static int device_close(struct inode *inode, struct file *file) #else static void device_close(struct inode *inode, struct file *file) #endif { printk ("device_release(%p,%p)\n", inode, file); Device_Open --; //#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) // MOD_DEC_USE_COUNT; //#endif #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0) return 0; #endif } struct file_operations Fops = { open: device_open, release: device_close, ioctl: device_ioctl }; static struct pci_device_id pci_device_id_DevicePCI[] = { {VENDOR_ID, DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {} // end of list }; int device_probe(struct pci_dev *dev, const struct pci_device_id *id) { int ret; ret = pci_enable_device(dev); if (ret < 0) { printk(KERN_WARNING "DevicePCI: unable to initialize PCI device\n"); return ret; } ret = pci_request_regions(dev, "MyPCIDevice"); if (ret < 0) { printk(KERN_WARNING "DevicePCI: 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 "DevicePCI: memstart=0x%lx memlen=0x%lx\n", memstart, memlen); vaddr = ioremap(memstart, memlen); lastwrite = readw(vaddr); printk(KERN_WARNING "DevicePCI: vaddr=0x%08X current=0x%08X\n", (u32) vaddr, (u32) lastwrite); // writew(vaddr, ); // writew(0xDEAD, vaddr+i); printk(KERN_INFO "DevicePCI: device_probe successful\n"); /* Register the character device (atleast try) */ ret = register_chrdev(MAJOR_NUM, DEVICE_NAME, &Fops); /* Negative values signify an error */ if (ret < 0) { printk (KERN_INFO "%s failed with %d\n", "Sorry, registering the character device ", ret); return ret; } else { printk (KERN_INFO "%s The major device number is %d.\n", "Registeration is a success", MAJOR_NUM); printk (KERN_INFO "If you want to talk to the device driver,\n"); printk (KERN_INFO "you'll have to create a device file. \n"); printk (KERN_INFO "We suggest you use:\n"); printk (KERN_INFO "mknod /dev/%s c %d 0\n", DEVICE_NAME, MAJOR_NUM); printk (KERN_INFO "The device file name is important, because\n"); printk (KERN_INFO "the ioctl program assumes that's the\n"); printk (KERN_INFO "file you'll use.\n"); } return ret; } void device_remove(struct pci_dev *dev) { unregister_chrdev(MAJOR_NUM, DEVICE_NAME); iounmap(vaddr); // release_mem_region(memstart, memlen); pci_release_regions(dev); pci_disable_device(dev); printk(KERN_INFO "DevicePCI: device removed\n"); } struct pci_driver pci_driver_DevicePCI = { name: "MyPCIDevice", id_table: pci_device_id_DevicePCI, probe: device_probe, remove: device_remove }; static int init_module_DevicePCI(void) { printk(KERN_INFO "DevicePCI: init\n"); return pci_module_init(&pci_driver_DevicePCI); } void cleanup_module_DevicePCI(void) { printk(KERN_INFO "DevicePCI: cleanup\n"); pci_unregister_driver(&pci_driver_DevicePCI); } module_init(init_module_DevicePCI); module_exit(cleanup_module_DevicePCI);