diff options
Diffstat (limited to 'drivers/staging/dt3155/dt3155_drv.c')
| -rw-r--r-- | drivers/staging/dt3155/dt3155_drv.c | 1099 |
1 files changed, 0 insertions, 1099 deletions
diff --git a/drivers/staging/dt3155/dt3155_drv.c b/drivers/staging/dt3155/dt3155_drv.c deleted file mode 100644 index 40ef97f3feb5..000000000000 --- a/drivers/staging/dt3155/dt3155_drv.c +++ /dev/null @@ -1,1099 +0,0 @@ -/* - -Copyright 1996,2002,2005 Gregory D. Hager, Alfred A. Rizzi, Noah J. Cowan, - Jason Lapenta, Scott Smedley, Greg Sharp - -This file is part of the DT3155 Device Driver. - -The DT3155 Device Driver 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 DT3155 Device Driver 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 DT3155 Device Driver; if not, write to the Free -Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, -MA 02111-1307 USA - --- Changes -- - - Date Programmer Description of changes made - ------------------------------------------------------------------- - 03-Jul-2000 JML n/a - 10-Oct-2001 SS port to 2.4 kernel - 02-Apr-2002 SS Mods to use allocator as a standalone module; - Merged John Roll's changes (john@cfa.harvard.edu) - to make work with multiple boards. - 02-Jul-2002 SS Merged James Rose's chages (rosejr@purdue.edu) to: - * fix successive interrupt-driven captures - * add select/poll support. - 10-Jul-2002 GCS Add error check when ndevices > MAXBOARDS. - 02-Aug-2002 GCS Fix field mode so that odd (lower) field is stored - in lower half of buffer. - 05-Aug-2005 SS port to 2.6 kernel. - 26-Oct-2009 SS port to 2.6.30 kernel. - --- Notes -- - -** appended "mem=124" in lilo.conf to allow for 4megs free on my 128meg system. - * using allocator.c and allocator.h from o'reilly book (alessandro rubini) - ftp://ftp.systemy.it/pub/develop (see README.allocator) - - + might want to get rid of MAXboards for allocating initial buffer. - confusing and not necessary - - + in cleanup_module the MOD_IN_USE looks like it is check after it should - - * GFP_DMA should not be set with a PCI system (pg 291) - - - NJC why are only two buffers allowed? (see isr, approx line 358) - -*/ - -extern void printques(int); - -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/pci.h> -#include <linux/types.h> -#include <linux/poll.h> -#include <linux/sched.h> -#include <linux/smp_lock.h> - -#include <asm/io.h> -#include <asm/uaccess.h> - -#include "dt3155.h" -#include "dt3155_drv.h" -#include "dt3155_isr.h" -#include "dt3155_io.h" -#include "allocator.h" - - -MODULE_LICENSE("GPL"); - -/* Error variable. Zero means no error. */ -int dt3155_errno = 0; - -#ifndef PCI_DEVICE_ID_INTEL_7116 -#define PCI_DEVICE_ID_INTEL_7116 0x1223 -#endif - -#define DT3155_VENDORID PCI_VENDOR_ID_INTEL -#define DT3155_DEVICEID PCI_DEVICE_ID_INTEL_7116 -#define MAXPCI 16 - -#ifdef DT_DEBUG -#define DT_3155_DEBUG_MSG(x,y) printk(x,y) -#else -#define DT_3155_DEBUG_MSG(x,y) -#endif - -/* wait queue for interrupts */ -wait_queue_head_t dt3155_read_wait_queue[MAXBOARDS]; - -#define DT_3155_SUCCESS 0 -#define DT_3155_FAILURE -EIO - -/* set to dynamicaly allocate, but it is tunable: */ -/* insmod DT_3155 dt3155 dt3155_major=XX */ -int dt3155_major = 0; - -/* The minor numbers are 0 and 1 ... they are not tunable. - * They are used as the indices for the structure vectors, - * and register address vectors - */ - -/* Global structures and variables */ - -/* Status of each device */ -struct dt3155_status dt3155_status[MAXBOARDS]; - -/* kernel logical address of the board */ -u8 *dt3155_lbase[MAXBOARDS] = { NULL -#if MAXBOARDS == 2 - , NULL -#endif -}; -/* DT3155 registers */ -u8 *dt3155_bbase = NULL; /* kernel logical address of the * - * buffer region */ -u32 dt3155_dev_open[MAXBOARDS] = {0 -#if MAXBOARDS == 2 - , 0 -#endif -}; - -u32 ndevices = 0; -u32 unique_tag = 0;; - - -/* - * Stops interrupt generation right away and resets the status - * to idle. I don't know why this works and the other way doesn't. - * (James Rose) - */ -static void quick_stop (int minor) -{ - // TODO: scott was here -#if 1 - ReadMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - /* disable interrupts */ - int_csr_r.fld.FLD_END_EVE_EN = 0; - int_csr_r.fld.FLD_END_ODD_EN = 0; - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - - dt3155_status[minor].state &= ~(DT3155_STATE_STOP|0xff); - /* mark the system stopped: */ - dt3155_status[minor].state |= DT3155_STATE_IDLE; - dt3155_fbuffer[minor]->stop_acquire = 0; - dt3155_fbuffer[minor]->even_stopped = 0; -#else - dt3155_status[minor].state |= DT3155_STATE_STOP; - dt3155_status[minor].fbuffer.stop_acquire = 1; -#endif - -} - - -/***************************************************** - * dt3155_isr() Interrupt service routien - * - * - looks like this isr supports IRQ sharing (or could) JML - * - Assumes irq's are disabled, via SA_INTERRUPT flag - * being set in request_irq() call from init_module() - *****************************************************/ -static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) -{ - int minor = -1; - int index; - unsigned long flags; - u32 buffer_addr; - - /* find out who issued the interrupt */ - for (index = 0; index < ndevices; index++) { - if(dev_id == (void*) &dt3155_status[index]) - { - minor = index; - break; - } - } - - /* hopefully we should not get here */ - if (minor < 0 || minor >= MAXBOARDS) { - printk(KERN_ERR "dt3155_isr called with invalid dev_id\n"); - return; - } - - /* Check for corruption and set a flag if so */ - ReadMReg((dt3155_lbase[minor] + CSR1), csr1_r.reg); - - if ((csr1_r.fld.FLD_CRPT_EVE) || (csr1_r.fld.FLD_CRPT_ODD)) - { - /* TODO: this should probably stop acquisition */ - /* and set some flags so that dt3155_read */ - /* returns an error next time it is called */ - dt3155_errno = DT_ERR_CORRUPT; - printk("dt3155: corrupt field\n"); - return; - } - - ReadMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - - /* Handle the even field ... */ - if (int_csr_r.fld.FLD_END_EVE) - { - if ((dt3155_status[minor].state & DT3155_STATE_MODE) == - DT3155_STATE_FLD) - { - dt3155_fbuffer[minor]->frame_count++; - } - - ReadI2C(dt3155_lbase[minor], EVEN_CSR, &i2c_even_csr.reg); - - /* Clear the interrupt? */ - int_csr_r.fld.FLD_END_EVE = 1; - - /* disable the interrupt if last field */ - if (dt3155_fbuffer[minor]->stop_acquire) - { - printk("dt3155: even stopped.\n"); - dt3155_fbuffer[minor]->even_stopped = 1; - if (i2c_even_csr.fld.SNGL_EVE) - { - int_csr_r.fld.FLD_END_EVE_EN = 0; - } - else - { - i2c_even_csr.fld.SNGL_EVE = 1; - } - } - - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - - /* Set up next DMA if we are doing FIELDS */ - if ((dt3155_status[minor].state & DT3155_STATE_MODE) == - DT3155_STATE_FLD) - { - /* GCS (Aug 2, 2002) -- In field mode, dma the odd field - into the lower half of the buffer */ - const u32 stride = dt3155_status[minor].config.cols; - buffer_addr = dt3155_fbuffer[minor]-> - frame_info[dt3155_fbuffer[minor]->active_buf].addr - + (DT3155_MAX_ROWS / 2) * stride; - local_save_flags(flags); - local_irq_disable(); - wake_up_interruptible(&dt3155_read_wait_queue[minor]); - - /* Set up the DMA address for the next field */ - local_irq_restore(flags); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_START), buffer_addr); - } - - /* Check for errors. */ - i2c_even_csr.fld.DONE_EVE = 1; - if (i2c_even_csr.fld.ERROR_EVE) - dt3155_errno = DT_ERR_OVERRUN; - - WriteI2C(dt3155_lbase[minor], EVEN_CSR, i2c_even_csr.reg); - - /* Note that we actually saw an even field meaning */ - /* that subsequent odd field complete the frame */ - dt3155_fbuffer[minor]->even_happened = 1; - - /* recording the time that the even field finished, this should be */ - /* about time in the middle of the frame */ - do_gettimeofday(&(dt3155_fbuffer[minor]-> - frame_info[dt3155_fbuffer[minor]-> - active_buf].time)); - return; - } - - /* ... now handle the odd field */ - if (int_csr_r.fld.FLD_END_ODD) - { - ReadI2C(dt3155_lbase[minor], ODD_CSR, &i2c_odd_csr.reg); - - /* Clear the interrupt? */ - int_csr_r.fld.FLD_END_ODD = 1; - - if (dt3155_fbuffer[minor]->even_happened || - (dt3155_status[minor].state & DT3155_STATE_MODE) == - DT3155_STATE_FLD) - { - dt3155_fbuffer[minor]->frame_count++; - } - - if (dt3155_fbuffer[minor]->stop_acquire && - dt3155_fbuffer[minor]->even_stopped) - { - printk(KERN_DEBUG "dt3155: stopping odd..\n"); - if (i2c_odd_csr.fld.SNGL_ODD) - { - /* disable interrupts */ - int_csr_r.fld.FLD_END_ODD_EN = 0; - dt3155_status[minor].state &= ~(DT3155_STATE_STOP|0xff); - - /* mark the system stopped: */ - dt3155_status[minor].state |= DT3155_STATE_IDLE; - dt3155_fbuffer[minor]->stop_acquire = 0; - dt3155_fbuffer[minor]->even_stopped = 0; - - printk(KERN_DEBUG "dt3155: state is now %x\n", - dt3155_status[minor].state); - } - else - { - i2c_odd_csr.fld.SNGL_ODD = 1; - } - } - - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - - /* if the odd field has been acquired, then */ - /* change the next dma location for both fields */ - /* and wake up the process if sleeping */ - if (dt3155_fbuffer[minor]->even_happened || - (dt3155_status[minor].state & DT3155_STATE_MODE) == - DT3155_STATE_FLD) - { - - local_save_flags(flags); - local_irq_disable(); - -#ifdef DEBUG_QUES_B - printques(minor); -#endif - if (dt3155_fbuffer[minor]->nbuffers > 2) - { - if (!are_empty_buffers(minor)) - { - /* The number of active + locked buffers is - * at most 2, and since there are none empty, there - * must be at least nbuffers-2 ready buffers. - * This is where we 'drop frames', oldest first. */ - push_empty(pop_ready(minor), minor); - } - - /* The ready_que can't be full, since we know - * there is one active buffer right now, so it's safe - * to push the active buf on the ready_que. */ - push_ready(minor, dt3155_fbuffer[minor]->active_buf); - /* There's at least 1 empty -- make it active */ - dt3155_fbuffer[minor]->active_buf = pop_empty(minor); - dt3155_fbuffer[minor]-> - frame_info[dt3155_fbuffer[minor]-> - active_buf].tag = ++unique_tag; - } - else /* nbuffers == 2, special case */ - { /* There is 1 active buffer. - * If there is a locked buffer, keep the active buffer - * the same -- that means we drop a frame. - */ - if (dt3155_fbuffer[minor]->locked_buf < 0) - { - push_ready(minor, - dt3155_fbuffer[minor]->active_buf); - if (are_empty_buffers(minor)) - { - dt3155_fbuffer[minor]->active_buf = - pop_empty(minor); - } - else - { /* no empty or locked buffers, so use a readybuf */ - dt3155_fbuffer[minor]->active_buf = - pop_ready(minor); - } - } - } - -#ifdef DEBUG_QUES_B - printques(minor); -#endif - - dt3155_fbuffer[minor]->even_happened = 0; - - wake_up_interruptible(&dt3155_read_wait_queue[minor]); - - local_irq_restore(flags); - } - - - /* Set up the DMA address for the next frame/field */ - buffer_addr = dt3155_fbuffer[minor]-> - frame_info[dt3155_fbuffer[minor]->active_buf].addr; - if ((dt3155_status[minor].state & DT3155_STATE_MODE) == - DT3155_STATE_FLD) - { - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), buffer_addr); - } - else - { - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), buffer_addr); - - WriteMReg((dt3155_lbase[minor] + ODD_DMA_START), buffer_addr - + dt3155_status[minor].config.cols); - } - - /* Do error checking */ - i2c_odd_csr.fld.DONE_ODD = 1; - if (i2c_odd_csr.fld.ERROR_ODD) - dt3155_errno = DT_ERR_OVERRUN; - - WriteI2C(dt3155_lbase[minor], ODD_CSR, i2c_odd_csr.reg); - - return; - } - /* If we get here, the Odd Field wasn't it either... */ - printk("neither even nor odd. shared perhaps?\n"); -} - -/***************************************************** - * init_isr(int minor) - * turns on interupt generation for the card - * designated by "minor". - * It is called *only* from inside ioctl(). - *****************************************************/ -static void dt3155_init_isr(int minor) -{ - const u32 stride = dt3155_status[minor].config.cols; - - switch (dt3155_status[minor].state & DT3155_STATE_MODE) - { - case DT3155_STATE_FLD: - { - even_dma_start_r = dt3155_status[minor]. - fbuffer.frame_info[dt3155_status[minor].fbuffer.active_buf].addr; - even_dma_stride_r = 0; - odd_dma_stride_r = 0; - - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), - even_dma_start_r); - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_STRIDE), - even_dma_stride_r); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_STRIDE), - odd_dma_stride_r); - break; - } - - case DT3155_STATE_FRAME: - default: - { - even_dma_start_r = dt3155_status[minor]. - fbuffer.frame_info[dt3155_status[minor].fbuffer.active_buf].addr; - odd_dma_start_r = even_dma_start_r + stride; - even_dma_stride_r = stride; - odd_dma_stride_r = stride; - - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_START), - even_dma_start_r); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_START), - odd_dma_start_r); - WriteMReg((dt3155_lbase[minor] + EVEN_DMA_STRIDE), - even_dma_stride_r); - WriteMReg((dt3155_lbase[minor] + ODD_DMA_STRIDE), - odd_dma_stride_r); - break; - } - } - - /* 50/60 Hz should be set before this point but let's make sure it is */ - /* right anyway */ - - ReadI2C(dt3155_lbase[minor], CSR2, &i2c_csr2.reg); - i2c_csr2.fld.HZ50 = FORMAT50HZ; - WriteI2C(dt3155_lbase[minor], CSR2, i2c_csr2.reg); - - /* enable busmaster chip, clear flags */ - - /* - * TODO: - * shouldn't we be concered with continuous values of - * DT3155_SNAP & DT3155_ACQ here? (SS) - */ - - csr1_r.reg = 0; - csr1_r.fld.CAP_CONT_EVE = 1; /* use continuous capture bits to */ - csr1_r.fld.CAP_CONT_ODD = 1; /* enable */ - csr1_r.fld.FLD_DN_EVE = 1; /* writing a 1 clears flags */ - csr1_r.fld.FLD_DN_ODD = 1; - csr1_r.fld.SRST = 1; /* reset - must be 1 */ - csr1_r.fld.FIFO_EN = 1; /* fifo control - must be 1 */ - csr1_r.fld.FLD_CRPT_EVE = 1; /* writing a 1 clears flags */ - csr1_r.fld.FLD_CRPT_ODD = 1; - - WriteMReg((dt3155_lbase[minor] + CSR1),csr1_r.reg); - - /* Enable interrupts at the end of each field */ - - int_csr_r.reg = 0; - int_csr_r.fld.FLD_END_EVE_EN = 1; - int_csr_r.fld.FLD_END_ODD_EN = 1; - int_csr_r.fld.FLD_START_EN = 0; - - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - - /* start internal BUSY bits */ - - ReadI2C(dt3155_lbase[minor], CSR2, &i2c_csr2.reg); - i2c_csr2.fld.BUSY_ODD = 1; - i2c_csr2.fld.BUSY_EVE = 1; - WriteI2C(dt3155_lbase[minor], CSR2, i2c_csr2.reg); - - /* Now its up to the interrupt routine!! */ - - return; -} - - -/***************************************************** - * ioctl() - * - *****************************************************/ -static int dt3155_ioctl(struct inode *inode, - struct file *file, - unsigned int cmd, - unsigned long arg) -{ - int minor = MINOR(inode->i_rdev); /* What device are we ioctl()'ing? */ - - if (minor >= MAXBOARDS || minor < 0) - return -ENODEV; - - /* make sure it is valid command */ - if (_IOC_NR(cmd) > DT3155_IOC_MAXNR) - { - printk("DT3155: invalid IOCTL(0x%x)\n",cmd); - printk("DT3155: Valid commands (0x%x), (0x%x), (0x%x), (0x%x), (0x%x)\n", - (unsigned int)DT3155_GET_CONFIG, - (unsigned int)DT3155_SET_CONFIG, - (unsigned int)DT3155_START, - (unsigned int)DT3155_STOP, - (unsigned int)DT3155_FLUSH); - return -EINVAL; - } - - switch (cmd) - { - case DT3155_SET_CONFIG: - { - if (dt3155_status[minor].state != DT3155_STATE_IDLE) - return -EBUSY; - - { - struct dt3155_config tmp; - if (copy_from_user((void *)&tmp, (void *) arg, sizeof(tmp))) - return -EFAULT; - /* check for valid settings */ - if (tmp.rows > DT3155_MAX_ROWS || - tmp.cols > DT3155_MAX_COLS || - (tmp.acq_mode != DT3155_MODE_FRAME && - tmp.acq_mode != DT3155_MODE_FIELD) || - (tmp.continuous != DT3155_SNAP && - tmp.continuous != DT3155_ACQ)) - { - return -EINVAL; - } - dt3155_status[minor].config = tmp; - } - return 0; - } - case DT3155_GET_CONFIG: - { - if (copy_to_user((void *) arg, (void *) &dt3155_status[minor], - sizeof(struct dt3155_status))) - return -EFAULT; - return 0; - } - case DT3155_FLUSH: /* Flushes the buffers -- ensures fresh data */ - { - if (dt3155_status[minor].state != DT3155_STATE_IDLE) - return -EBUSY; - return dt3155_flush(minor); - } - case DT3155_STOP: - { - if (dt3155_status[minor].state & DT3155_STATE_STOP || - dt3155_status[minor].fbuffer.stop_acquire) - return -EBUSY; - - if (dt3155_status[minor].state == DT3155_STATE_IDLE) - return 0; - - quick_stop(minor); - if (copy_to_user((void *) arg, (void *) &dt3155_status[minor], - sizeof(struct dt3155_status))) - return -EFAULT; - return 0; - } - case DT3155_START: - { - if (dt3155_status[minor].state != DT3155_STATE_IDLE) - return -EBUSY; - - dt3155_status[minor].fbuffer.stop_acquire = 0; - dt3155_status[minor].fbuffer.frame_count = 0; - - /* Set the MODE in the status -- we default to FRAME */ - if (dt3155_status[minor].config.acq_mode == DT3155_MODE_FIELD) - { - dt3155_status[minor].state = DT3155_STATE_FLD; - } - else - { - dt3155_status[minor].state = DT3155_STATE_FRAME; - } - - dt3155_init_isr(minor); - if (copy_to_user((void *) arg, (void *) &dt3155_status[minor], - sizeof(struct dt3155_status))) - return -EFAULT; - return 0; - } - default: - { - printk("DT3155: invalid IOCTL(0x%x)\n",cmd); - printk("DT3155: Valid commands (0x%x), (0x%x), (0x%x), (0x%x), (0x%x)\n", - (unsigned int)DT3155_GET_CONFIG, - (unsigned int)DT3155_SET_CONFIG, - DT3155_START, DT3155_STOP, DT3155_FLUSH); - return -ENOSYS; - } - } - return -ENOSYS; -} - -/***************************************************** - * mmap() - * - * only allow the user to mmap the registers and buffer - * It is quite possible that this is broken, since the - * addition of of the capacity for two cards!!!!!!!! - * It *looks* like it should work but since I'm not - * sure how to use it, I'm not actually sure. (NJC? ditto by SS) - *****************************************************/ -static int dt3155_mmap (struct file * file, struct vm_area_struct * vma) -{ - /* which device are we mmapping? */ - int minor = MINOR(file->f_dentry->d_inode->i_rdev); - unsigned long offset; - offset = vma->vm_pgoff << PAGE_SHIFT; - - if (offset >= __pa(high_memory) || (file->f_flags & O_SYNC)) - vma->vm_flags |= VM_IO; - - /* Don't try to swap out physical pages.. */ - vma->vm_flags |= VM_RESERVED; - - /* they are mapping the registers or the buffer */ - if ((offset == dt3155_status[minor].reg_addr && - vma->vm_end - vma->vm_start == PCI_PAGE_SIZE) || - (offset == dt3155_status[minor].mem_addr && - vma->vm_end - vma->vm_start == dt3155_status[minor].mem_size)) - { - if (remap_pfn_range(vma, - vma->vm_start, - offset >> PAGE_SHIFT, - vma->vm_end - vma->vm_start, - vma->vm_page_prot)) { - printk("DT3155: remap_page_range() failed.\n"); - return -EAGAIN; - } - } - else - { - printk("DT3155: dt3155_mmap() bad call.\n"); - return -ENXIO; - } - - return 0; -} - - -/***************************************************** - * open() - * - * Our special open code. - * MOD_INC_USE_COUNT make sure that the driver memory is not freed - * while the device is in use. - *****************************************************/ -static int dt3155_open(struct inode* inode, struct file* filep) -{ - int minor = MINOR(inode->i_rdev); /* what device are we opening? */ - if (dt3155_dev_open[minor]) { - printk ("DT3155: Already opened by another process.\n"); - return -EBUSY; - } - - if (dt3155_status[minor].device_installed==0) - { - printk("DT3155 Open Error: No such device dt3155 minor number %d\n", - minor); - return -EIO; - } - - if (dt3155_status[minor].state != DT3155_STATE_IDLE) { - printk ("DT3155: Not in idle state (state = %x)\n", - dt3155_status[minor].state); - return -EBUSY; - } - - printk("DT3155: Device opened.\n"); - - dt3155_dev_open[minor] = 1 ; - - dt3155_flush(minor); - - /* Disable ALL interrupts */ - int_csr_r.reg = 0; - WriteMReg((dt3155_lbase[minor] + INT_CSR), int_csr_r.reg); - - init_waitqueue_head(&(dt3155_read_wait_queue[minor])); - - return 0; -} - - -/***************************************************** - * close() - * - * Now decrement the use count. - * - *****************************************************/ -static int dt3155_close(struct inode *inode, struct file *filep) -{ - int minor; - - minor = MINOR(inode->i_rdev); /* which device are we closing */ - if (!dt3155_dev_open[minor]) - { - printk("DT3155: attempt to CLOSE a not OPEN device\n"); - } - else - { - dt3155_dev_open[minor] = 0; - - if (dt3155_status[minor].state != DT3155_STATE_IDLE) - { - quick_stop(minor); - } - } - return 0; -} - -/***************************************************** - * read() - * - *****************************************************/ -static ssize_t dt3155_read(struct file *filep, char __user *buf, - size_t count, loff_t *ppos) -{ - /* which device are we reading from? */ - int minor = MINOR(filep->f_dentry->d_inode->i_rdev); - u32 offset; - int frame_index; - struct frame_info *frame_info; - - /* TODO: this should check the error flag and */ - /* return an error on hardware failures */ - if (count != sizeof(struct dt3155_read)) - { - printk("DT3155 ERROR (NJC): count is not right\n"); - return -EINVAL; - } - - - /* Hack here -- I'm going to allow reading even when idle. - * this is so that the frames can be read after STOP has - * been called. Leaving it here, commented out, as a reminder - * for a short while to make sure there are no problems. - * Note that if the driver is not opened in non_blocking mode, - * and the device is idle, then it could sit here forever! */ - - /* if (dt3155_status[minor].state == DT3155_STATE_IDLE)*/ - /* return -EBUSY;*/ - - /* non-blocking reads should return if no data */ - if (filep->f_flags & O_NDELAY) - { - if ((frame_index = dt3155_get_ready_buffer(minor)) < 0) { - /*printk("dt3155: no buffers available (?)\n");*/ - /* printques(minor); */ - return -EAGAIN; - } - } - else - { - /* - * sleep till data arrives , or we get interrupted. - * Note that wait_event_interruptible() does not actually - * sleep/wait if it's condition evaluates to true upon entry. - */ - wait_event_interruptible(dt3155_read_wait_queue[minor], - (frame_index = dt3155_get_ready_buffer(minor)) - >= 0); - - if (frame_index < 0) - { - printk ("DT3155: read: interrupted\n"); - quick_stop (minor); - printques(minor); - return -EINTR; - } - } - - frame_info = &dt3155_status[minor].fbuffer.frame_info[frame_index]; - - /* make this an offset */ - offset = frame_info->addr - dt3155_status[minor].mem_addr; - - put_user(offset, (unsigned int *) buf); - buf += sizeof(u32); - put_user(dt3155_status[minor].fbuffer.frame_count, (unsigned int *) buf); - buf += sizeof(u32); - put_user(dt3155_status[minor].state, (unsigned int *) buf); - buf += sizeof(u32); - if (copy_to_user(buf, frame_info, sizeof(*frame_info))) - return -EFAULT; - - return sizeof(struct dt3155_read); -} - -static unsigned int dt3155_poll (struct file * filp, poll_table *wait) -{ - int minor = MINOR(filp->f_dentry->d_inode->i_rdev); - - if (!is_ready_buf_empty(minor)) - return POLLIN | POLLRDNORM; - - poll_wait (filp, &dt3155_read_wait_queue[minor], wait); - - return 0; -} - -static long -dt3155_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - int ret; - - lock_kernel(); - ret = dt3155_ioctl(file->f_path.dentry->d_inode, file, cmd, arg); - unlock_kernel(); - - return ret; -} - -/***************************************************** - * file operations supported by DT3155 driver - * needed by init_module - * register_chrdev - *****************************************************/ -static struct file_operations dt3155_fops = { - .read = dt3155_read, - .unlocked_ioctl = dt3155_unlocked_ioctl, - .mmap = dt3155_mmap, - .poll = dt3155_poll, - .open = dt3155_open, - .release = dt3155_close -}; - - -/***************************************************** - * find_PCI(); - * - * PCI has been totally reworked in 2.1.. - *****************************************************/ -static int find_PCI (void) -{ - struct pci_dev *pci_dev = NULL; - int error, pci_index = 0; - unsigned short rev_device; - unsigned long base; - unsigned char irq; - - while ((pci_dev = pci_get_device - (DT3155_VENDORID, DT3155_DEVICEID, pci_dev)) != NULL) - { - pci_index ++; - - /* Is it really there? */ - if ((error = - pci_read_config_word(pci_dev, PCI_CLASS_DEVICE, &rev_device))) - continue; - - /* Found a board */ - DT_3155_DEBUG_MSG("DT3155: Device number %d \n", pci_index); - - /* Make sure the driver was compiled with enough buffers to handle - this many boards */ - if (pci_index > MAXBOARDS) { - printk("DT3155: ERROR - found %d devices, but driver only configured " - "for %d devices\n" - "DT3155: Please change MAXBOARDS in dt3155.h\n", - pci_index, MAXBOARDS); - goto err; - } - - /* Now, just go out and make sure that this/these device(s) is/are - actually mapped into the kernel address space */ - if ((error = pci_read_config_dword(pci_dev, PCI_BASE_ADDRESS_0, - (u32 *) &base))) - { - printk("DT3155: Was not able to find device \n"); - goto err; - } - - DT_3155_DEBUG_MSG("DT3155: Base address 0 for device is %lx \n", base); - dt3155_status[pci_index-1].reg_addr = base; - - /* Remap the base address to a logical address through which we - * can access it. */ - dt3155_lbase[pci_index - 1] = ioremap(base,PCI_PAGE_SIZE); - dt3155_status[pci_index - 1].reg_addr = base; - DT_3155_DEBUG_MSG("DT3155: New logical address is %p \n", - dt3155_lbase[pci_index-1]); - if (!dt3155_lbase[pci_index-1]) - { - printk("DT3155: Unable to remap control registers\n"); - goto err; - } - - if ((error = pci_read_config_byte(pci_dev, PCI_INTERRUPT_LINE, &irq))) - { - printk("DT3155: Was not able to find device \n"); - goto err; - } - - DT_3155_DEBUG_MSG("DT3155: IRQ is %d \n",irq); - dt3155_status[pci_index-1].irq = irq; - /* Set flag: kth device found! */ - dt3155_status[pci_index-1].device_installed = 1; - printk("DT3155: Installing device %d w/irq %d and address %p\n", - pci_index, - dt3155_status[pci_index-1].irq, - dt3155_lbase[pci_index-1]); - - } - ndevices = pci_index; - - return DT_3155_SUCCESS; - -err: - pci_dev_put(pci_dev); - return DT_3155_FAILURE; -} - -u32 allocatorAddr = 0; - -/***************************************************** - * init_module() - *****************************************************/ -int init_module(void) -{ - int index; - int rcode = 0; - char *devname[MAXBOARDS]; - - devname[0] = "dt3155a"; -#if MAXBOARDS == 2 - devname[1] = "dt3155b"; -#endif - - printk("DT3155: Loading module...\n"); - - /* Register the device driver */ - rcode = register_chrdev(dt3155_major, "dt3155", &dt3155_fops); - if(rcode < 0) - { - printk(KERN_INFO "DT3155: register_chrdev failed \n"); - return rcode; - } - - if(dt3155_major == 0) - dt3155_major = rcode; /* dynamic */ - - - /* init the status variables. */ - /* DMA memory is taken care of in setup_buffers() */ - for (index = 0; index < MAXBOARDS; index++) - { - dt3155_status[index].config.acq_mode = DT3155_MODE_FRAME; - dt3155_status[index].config.continuous = DT3155_ACQ; - dt3155_status[index].config.cols = DT3155_MAX_COLS; - dt3155_status[index].config.rows = DT3155_MAX_ROWS; - dt3155_status[index].state = DT3155_STATE_IDLE; - - /* find_PCI() will check if devices are installed; */ - /* first assume they're not: */ - dt3155_status[index].mem_addr = 0; - dt3155_status[index].mem_size = 0; - dt3155_status[index].state = DT3155_STATE_IDLE; - dt3155_status[index].device_installed = 0; - } - - /* Now let's find the hardware. find_PCI() will set ndevices to the - * number of cards found in this machine. */ - { - if ((rcode = find_PCI()) != DT_3155_SUCCESS) - { - printk("DT3155 error: find_PCI() failed to find dt3155 board(s)\n"); - unregister_chrdev(dt3155_major, "dt3155"); - return rcode; - } - } - - /* Ok, time to setup the frame buffers */ - if((rcode = dt3155_setup_buffers(&allocatorAddr)) < 0) - { - printk("DT3155: Error: setting up buffer not large enough."); - unregister_chrdev(dt3155_major, "dt3155"); - return rcode; - } - - /* If we are this far, then there is enough RAM */ - /* for the buffers: Print the configuration. */ - for( index = 0; index < ndevices; index++) - { - printk("DT3155: Device = %d; acq_mode = %d; " - "continuous = %d; cols = %d; rows = %d;\n", - index , - dt3155_status[index].config.acq_mode, - dt3155_status[index].config.continuous, - dt3155_status[index].config.cols, - dt3155_status[index].config.rows); - printk("DT3155: m_addr = 0x%x; m_size = %ld; " - "state = %d; device_installed = %d\n", - dt3155_status[index].mem_addr, - (long int)dt3155_status[index].mem_size, - dt3155_status[index].state, - dt3155_status[index].device_installed); - } - - /* Disable ALL interrupts */ - int_csr_r.reg = 0; - for( index = 0; index < ndevices; index++) - { - WriteMReg((dt3155_lbase[index] + INT_CSR), int_csr_r.reg); - if(dt3155_status[index].device_installed) - { - /* - * This driver *looks* like it can handle sharing interrupts, - * but I can't actually test myself. I've had reports that it - * DOES work so I'll enable it for now. This comment will remain - * as a reminder in case any problems arise. (SS) - */ - /* in older kernels flags are: SA_SHIRQ | SA_INTERRUPT */ - rcode = request_irq(dt3155_status[index].irq, (void *)dt3155_isr, - IRQF_SHARED | IRQF_DISABLED, devname[index], - (void*) &dt3155_status[index]); - if(rcode < 0) - { - printk("DT3155: minor %d request_irq failed for IRQ %d\n", - index, dt3155_status[index].irq); - unregister_chrdev(dt3155_major, "dt3155"); - return rcode; - } - } - } - - printk("DT3155: finished loading\n"); - - return 0; -} - -/***************************************************** - * cleanup_module(void) - * - *****************************************************/ -void cleanup_module(void) -{ - int index; - - printk("DT3155: cleanup_module called\n"); - - /* removed DMA allocated with the allocator */ -#ifdef STANDALONE_ALLOCATOR - if (allocatorAddr != 0) - allocator_free_dma(allocatorAddr); -#else - allocator_cleanup(); -#endif - - unregister_chrdev(dt3155_major, "dt3155"); - - for(index = 0; index < ndevices; index++) - { - if(dt3155_status[index].device_installed == 1) - { - printk("DT3155: Freeing irq %d for device %d\n", - dt3155_status[index].irq, index); - free_irq(dt3155_status[index].irq, (void*)&dt3155_status[index]); - } - } -} - |