Deleted: trunk/drivers/char/bfin_fbdma.c (4020 => 4021)
--- trunk/drivers/char/bfin_fbdma.c 2007-12-11 07:30:55 UTC (rev 4020)
+++ trunk/drivers/char/bfin_fbdma.c 2007-12-11 07:36:45 UTC (rev 4021)
@@ -1,387 +0,0 @@
-/*
- * File: drivers/char/bfin_fbdma.c
- * Based on:
- * Author: Michael Hennerich, Analog Devices Inc.
- *
- * Created:
- * Description:
- *
- * Rev: $Id: bfin_fbdma.c 2694 2007-01-26 15:59:03Z hennerich $
- *
- * Modified:
- * Copyright 2004-2007 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.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.
- *
- * This program 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 this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/rtc.h>
-
-#include <asm/blackfin.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/delay.h>
-#include <asm/dma.h>
-#include <asm/cacheflush.h>
-
-
-/************************************************************/
-
-/* definitions */
-
-#define FBDMA_MINOR 253
-
-#define FBDMA_DEVNAME "FBDMAFCP"
-#define FBDMA_INTNAME "FBDMA-FCP-INT" /* Should be less than 19 chars. */
-
-#define BITBLIT 0x1
-#define FILL 0x2
-#define BLOCKING 0x40
-
-#define DO_DMA 3
-#define GET_SEMAPHORE 4
-
-#define DRIVER_MAGIC 0xDEADBEEF
-
-/************************************************************/
-
-typedef struct FBDMA_Device_t {
- int opened;
- int nonblock;
- unsigned short irqnum;
- unsigned short done;
- wait_queue_head_t *avail;
- unsigned short* l1_data_dummy;
- unsigned short* user_semaphore;
-} fbdma_device_t;
-
-/************************************************************/
-
-/* Globals */
-
-static DECLARE_WAIT_QUEUE_HEAD(fbdma_q0);
-static fbdma_device_t fbdmainfo;
-static DEFINE_SPINLOCK(fbdmafcd_lock);
-
-typedef struct memoper {
- struct dmasg srcdesc;
- struct dmasg dstdesc;
- unsigned int type;
- unsigned int color;
- unsigned int magic;
-} MEMOPER;
-
-//--------------------------------------------------------------------------//
-// Function: Enable_MemDMA1 //
-//--------------------------------------------------------------------------//
-void Enable_MemDMA1(struct dmasg *us_MemDMA1_Src_Descriptor, struct dmasg *us_MemDMA1_Dst_Descriptor )
-{
- bfin_write_MDMA_D1_START_ADDR(us_MemDMA1_Dst_Descriptor->start_addr);
- bfin_write_MDMA_D1_X_COUNT(us_MemDMA1_Dst_Descriptor->x_count);
- bfin_write_MDMA_D1_X_MODIFY(us_MemDMA1_Dst_Descriptor->x_modify);
- bfin_write_MDMA_D1_Y_COUNT(us_MemDMA1_Dst_Descriptor->y_count);
- bfin_write_MDMA_D1_Y_MODIFY(us_MemDMA1_Dst_Descriptor->y_modify);
-
- bfin_write_MDMA_D1_IRQ_STATUS(0x3);
- bfin_write_MDMA_S1_START_ADDR(us_MemDMA1_Src_Descriptor->start_addr);
- bfin_write_MDMA_S1_X_COUNT(us_MemDMA1_Src_Descriptor->x_count);
- bfin_write_MDMA_S1_X_MODIFY(us_MemDMA1_Src_Descriptor->x_modify);
- bfin_write_MDMA_S1_Y_COUNT(us_MemDMA1_Src_Descriptor->y_count);
- bfin_write_MDMA_S1_Y_MODIFY(us_MemDMA1_Src_Descriptor->y_modify);
-
- bfin_write_MDMA_S1_IRQ_STATUS(0x3);
-
- bfin_write_MDMA_S1_CONFIG(us_MemDMA1_Src_Descriptor->cfg);
- bfin_write_MDMA_D1_CONFIG(us_MemDMA1_Dst_Descriptor->cfg);
-}
-
-
-/*
- * FUNCTION NAME: fbdma_irq
- *
- * INPUTS/OUTPUTS:
- * in_irq - Interrupt vector number.
- * in_dev_id - point to device information structure base address.
- *
- * VALUE RETURNED:
- * void
- *
- * FUNCTION(S) CALLED:
- *
- * GLOBAL VARIABLES REFERENCED: fbdmainfo
- *
- * GLOBAL VARIABLES MODIFIED: NIL
- *
- * DESCRIPTION: ISR of FBDMA
- *
- * CAUTION:
- */
-static irqreturn_t fbdma_irq(int irq, void *dev_id)
-{
- fbdma_device_t *pdev = (fbdma_device_t *) dev_id;
-
- pr_debug("fbdma_irq:\n");
-
- bfin_write_MDMA_D1_IRQ_STATUS(0x3);
- bfin_write_MDMA_S1_IRQ_STATUS(0x3);
-
- /* wake up */
-
- pdev->done = 1;
- *pdev->user_semaphore = 0;
-
-
- wake_up_interruptible(pdev->avail);
-
- pr_debug("fbdma_irq: return\n");
-
- return IRQ_HANDLED;
-}
-
-static int fbdma_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
-
- fbdma_device_t *pdev = file->private_data;
- int ierr;
-
- MEMOPER *ptr = (MEMOPER *) arg;
-
- switch (cmd) {
- case DO_DMA:
- {
-
- if(!ptr)
- return -EINVAL;
-
- if(ptr->magic != DRIVER_MAGIC){
- printk("DRIVER_MAGIC = %x\n",ptr->magic);
- return -EINVAL;
- }
-
- if(ptr->type & FILL){
- *pdev->l1_data_dummy = ptr->color;
- ptr->srcdesc.start_addr = (unsigned long)pdev->l1_data_dummy;
-
-#if defined(CONFIG_BFIN_DCACHE)
- if(ptr->dstdesc.start_addr < memory_end)
- blackfin_dcache_invalidate_range(ptr->dstdesc.start_addr,
- ptr->dstdesc.start_addr+(ptr->dstdesc.x_count * ptr->dstdesc.x_modify * ptr->dstdesc.y_count));
-#endif
-
- } else {
-
-#if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_WB)
- blackfin_dcache_flush_range(ptr->srcdesc.start_addr,
- ptr->srcdesc.start_addr+(ptr->srcdesc.x_count * ptr->srcdesc.x_modify * ptr->srcdesc.y_count));
-#endif
- }
-
- pdev->done = 0;
- *pdev->user_semaphore = 1;
-
- Enable_MemDMA1(&ptr->srcdesc, &ptr->dstdesc);
-
-
- /* Wait for data available */
- if (ptr->type & BLOCKING) {
- if (pdev->nonblock)
- return -EAGAIN;
- else {
- pr_debug("FBDMA wait_event_interruptible\n");
- ierr =
- wait_event_interruptible(*(pdev->avail),
- pdev->done);
- if (ierr) {
- /* waiting is broken by a signal */
- pr_debug("FBDMA wait_event_interruptible ierr\n");
- return ierr;
- }
- }
- }
-
- break;
- }
- case GET_SEMAPHORE:
- {
-
- void __user *argp = (void __user *)arg;
-
- unsigned long address = (unsigned long) pdev->user_semaphore;
-
- return copy_to_user(argp, &address, sizeof(address)) ? -EFAULT : 0;
-
-
- break;
- }
-
- default:
- return -EINVAL;
- }
-
-
- return 0;
-}
-
-
-
-/* We use fbdma_lock to protect against concurrent opens.*/
-static int fbdma_open(struct inode *inode, struct file *file)
-{
-
- char intname[20];
- unsigned long flags;
- int minor = MINOR(inode->i_rdev);
-
- pr_debug("fbdma_open:\n");
-
- /* FBDMA ? */
- if (minor != FBDMA_MINOR)
- return -ENXIO;
-
- spin_lock_irqsave(&fbdmafcd_lock, flags);
-
- if (fbdmainfo.opened) {
- spin_unlock_irqrestore(&fbdmafcd_lock, flags);
- return -EMFILE;
- }
-
- /* Clear configuration information */
- memset(&fbdmainfo, 0, sizeof(fbdma_device_t));
-
- if (file->f_flags & O_NONBLOCK)
- fbdmainfo.nonblock = 1;
-
- fbdmainfo.opened = 1;
- fbdmainfo.done = 0;
-
- fbdmainfo.avail = &fbdma_q0;
-
- strcpy(intname, FBDMA_INTNAME);
-
-
- file->private_data = &fbdmainfo;
-
-
- /* Request DMA channel, and pass the interrupt handler */
-
- if (request_dma(CH_MEM_STREAM1_SRC, "MEMDMA SRC") < 0) {
- panic("Unable to attach BlackFin MEMDMA DMA channel\n");
- fbdmainfo.opened = 0;
- spin_unlock_irqrestore(&fbdmafcd_lock, flags);
- return -EFAULT;
- }
-
- if (request_dma(CH_MEM_STREAM1_DEST, "MEMDMA DEST") < 0) {
- panic("Unable to attach BlackFin FBDMA DMA channel\n");
- fbdmainfo.opened = 0;
- free_dma(CH_MEM_STREAM1_SRC);
- spin_unlock_irqrestore(&fbdmafcd_lock, flags);
- return -EFAULT;
- } else
- set_dma_callback(CH_MEM_STREAM1_DEST, (void *)fbdma_irq,
- file->private_data);
-
- spin_unlock_irqrestore(&fbdmafcd_lock, flags);
-
-
- fbdmainfo.l1_data_dummy = l1_data_A_sram_alloc(sizeof(unsigned short));
- fbdmainfo.user_semaphore = l1_data_A_sram_alloc(sizeof(unsigned short));
-
-
- pr_debug("fbdma_open: return\n");
-
-
-
- return 0;
-}
-
-static int fbdma_release(struct inode *inode, struct file *file)
-{
- unsigned long flags;
- fbdma_device_t *pdev = file->private_data;
-
- pr_debug("fbdma_release: close()\n");
-
- spin_lock_irqsave(&fbdmafcd_lock, flags);
- /* After finish DMA, release it. */
- free_dma(CH_MEM_STREAM1_DEST);
- free_dma(CH_MEM_STREAM1_SRC);
-
- if (pdev->l1_data_dummy)
- l1_data_A_sram_free(pdev->l1_data_dummy);
-
- if (pdev->user_semaphore)
- l1_data_A_sram_free(pdev->user_semaphore);
-
- pdev->opened = 0;
- spin_unlock_irqrestore(&fbdmafcd_lock, flags);
-
-
- pr_debug("fbdma_release: close() return\n");
- return 0;
-}
-
-/*
- * The various file operations we support.
- */
-struct file_operations fbdma_fops = {
- owner: THIS_MODULE,
- ioctl: fbdma_ioctl,
- open: fbdma_open,
- release: fbdma_release,
-};
-
-static struct miscdevice fbdma_dev = {
- FBDMA_MINOR,
- "fbdma",
- &fbdma_fops
-};
-
-/* Init function called first time */
-int __init fbdma_init(void)
-{
-
- pr_debug("blackfin_fbdma_init\n");
-
- misc_register(&fbdma_dev);
-
- printk(KERN_INFO "FBDMA: major=%d, minor = %d\n", MISC_MAJOR, FBDMA_MINOR);
- return 0;
-}
-
-void __exit fbdma_exit (void)
-{
-
- misc_deregister(&fbdma_dev);
-}
-
-module_init(fbdma_init);
-module_exit(fbdma_exit);
-
-MODULE_AUTHOR("Michael Hennerich");
-MODULE_LICENSE("GPL");
