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author | H Hartley Sweeten <hartleys@visionengravers.com> | 2010-06-24 09:31:13 -0700 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-06-24 14:20:00 -0700 |
commit | 17701d14b613b8495cdd8b803c22d3f33d1face8 (patch) | |
tree | 07eaee96704d384340adf0cfcce9b4939f5a738f | |
parent | 9f79211cae935347891b918d345618eaca41d0b5 (diff) | |
download | linux-3.10-17701d14b613b8495cdd8b803c22d3f33d1face8.tar.gz linux-3.10-17701d14b613b8495cdd8b803c22d3f33d1face8.tar.bz2 linux-3.10-17701d14b613b8495cdd8b803c22d3f33d1face8.zip |
Staging: d53155_drv.c: cleanup fbuffer usage
The global symbol dt3155_fbuffer[], declared in dt3155_isr.c, is really
just a pointer to dt3155_status[].fbuffer. To improve readability, make
some of the really long lines shorter, and make the buffer access more
consistent, use &dt3155_status[].fbuffer to access the buffer structure.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Scott Smedley <ss@aao.gov.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r-- | drivers/staging/dt3155/dt3155_drv.c | 85 |
1 files changed, 40 insertions, 45 deletions
diff --git a/drivers/staging/dt3155/dt3155_drv.c b/drivers/staging/dt3155/dt3155_drv.c index 88c9e5990bd..f19cc1fe9f5 100644 --- a/drivers/staging/dt3155/dt3155_drv.c +++ b/drivers/staging/dt3155/dt3155_drv.c @@ -135,6 +135,8 @@ u32 unique_tag = 0;; */ static void quick_stop (int minor) { + struct dt3155_fbuffer *fb = &dt3155_status[minor].fbuffer; + // TODO: scott was here #if 1 int_csr_r.reg = readl(dt3155_lbase[minor] + INT_CSR); @@ -146,11 +148,11 @@ static void quick_stop (int minor) 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; + fb->stop_acquire = 0; + fb->even_stopped = 0; #else dt3155_status[minor].state |= DT3155_STATE_STOP; - dt3155_status[minor].fbuffer.stop_acquire = 1; + fb->stop_acquire = 1; #endif } @@ -170,6 +172,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) unsigned long flags; u32 buffer_addr; void __iomem *mmio; + struct dt3155_fbuffer *fb; /* find out who issued the interrupt */ for (index = 0; index < ndevices; index++) { @@ -187,6 +190,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) } mmio = dt3155_lbase[minor]; + fb = &dt3155_status[minor].fbuffer; /* Check for corruption and set a flag if so */ csr1_r.reg = readl(mmio + CSR1); @@ -209,7 +213,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) if ((dt3155_status[minor].state & DT3155_STATE_MODE) == DT3155_STATE_FLD) { - dt3155_fbuffer[minor]->frame_count++; + fb->frame_count++; } ReadI2C(mmio, EVEN_CSR, &i2c_even_csr.reg); @@ -218,10 +222,10 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) int_csr_r.fld.FLD_END_EVE = 1; /* disable the interrupt if last field */ - if (dt3155_fbuffer[minor]->stop_acquire) + if (fb->stop_acquire) { printk("dt3155: even stopped.\n"); - dt3155_fbuffer[minor]->even_stopped = 1; + fb->even_stopped = 1; if (i2c_even_csr.fld.SNGL_EVE) { int_csr_r.fld.FLD_END_EVE_EN = 0; @@ -241,9 +245,8 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* 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; + buffer_addr = fb->frame_info[fb->active_buf].addr + + (DT3155_MAX_ROWS / 2) * stride; local_save_flags(flags); local_irq_disable(); wake_up_interruptible(&dt3155_read_wait_queue[minor]); @@ -262,13 +265,11 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* Note that we actually saw an even field meaning */ /* that subsequent odd field complete the frame */ - dt3155_fbuffer[minor]->even_happened = 1; + fb->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)); + do_gettimeofday(&fb->frame_info[fb->active_buf].time); return; } @@ -280,15 +281,14 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* Clear the interrupt? */ int_csr_r.fld.FLD_END_ODD = 1; - if (dt3155_fbuffer[minor]->even_happened || + if (fb->even_happened || (dt3155_status[minor].state & DT3155_STATE_MODE) == DT3155_STATE_FLD) { - dt3155_fbuffer[minor]->frame_count++; + fb->frame_count++; } - if (dt3155_fbuffer[minor]->stop_acquire && - dt3155_fbuffer[minor]->even_stopped) + if (fb->stop_acquire && fb->even_stopped) { printk(KERN_DEBUG "dt3155: stopping odd..\n"); if (i2c_odd_csr.fld.SNGL_ODD) @@ -299,8 +299,8 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* mark the system stopped: */ dt3155_status[minor].state |= DT3155_STATE_IDLE; - dt3155_fbuffer[minor]->stop_acquire = 0; - dt3155_fbuffer[minor]->even_stopped = 0; + fb->stop_acquire = 0; + fb->even_stopped = 0; printk(KERN_DEBUG "dt3155: state is now %x\n", dt3155_status[minor].state); @@ -316,7 +316,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* 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 || + if (fb->even_happened || (dt3155_status[minor].state & DT3155_STATE_MODE) == DT3155_STATE_FLD) { @@ -327,7 +327,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) #ifdef DEBUG_QUES_B printques(minor); #endif - if (dt3155_fbuffer[minor]->nbuffers > 2) + if (fb->nbuffers > 2) { if (!are_empty_buffers(minor)) { @@ -341,31 +341,26 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* 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); + push_ready(minor, fb->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; + fb->active_buf = pop_empty(minor); + fb->frame_info[fb->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) + if (fb->locked_buf < 0) { - push_ready(minor, - dt3155_fbuffer[minor]->active_buf); + push_ready(minor, fb->active_buf); if (are_empty_buffers(minor)) { - dt3155_fbuffer[minor]->active_buf = - pop_empty(minor); + fb->active_buf = pop_empty(minor); } else { /* no empty or locked buffers, so use a readybuf */ - dt3155_fbuffer[minor]->active_buf = - pop_ready(minor); + fb->active_buf = pop_ready(minor); } } } @@ -374,7 +369,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) printques(minor); #endif - dt3155_fbuffer[minor]->even_happened = 0; + fb->even_happened = 0; wake_up_interruptible(&dt3155_read_wait_queue[minor]); @@ -383,8 +378,7 @@ static void dt3155_isr(int irq, void *dev_id, struct pt_regs *regs) /* Set up the DMA address for the next frame/field */ - buffer_addr = dt3155_fbuffer[minor]-> - frame_info[dt3155_fbuffer[minor]->active_buf].addr; + buffer_addr = fb->frame_info[fb->active_buf].addr; if ((dt3155_status[minor].state & DT3155_STATE_MODE) == DT3155_STATE_FLD) { @@ -421,13 +415,13 @@ static void dt3155_init_isr(int minor) { const u32 stride = dt3155_status[minor].config.cols; void __iomem *mmio = dt3155_lbase[minor]; + struct dt3155_fbuffer *fb = &dt3155_status[minor].fbuffer; 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_start_r = fb->frame_info[fb->active_buf].addr; even_dma_stride_r = 0; odd_dma_stride_r = 0; @@ -440,8 +434,7 @@ static void dt3155_init_isr(int minor) case DT3155_STATE_FRAME: default: { - even_dma_start_r = dt3155_status[minor]. - fbuffer.frame_info[dt3155_status[minor].fbuffer.active_buf].addr; + even_dma_start_r = fb->frame_info[fb->active_buf].addr; odd_dma_start_r = even_dma_start_r + stride; even_dma_stride_r = stride; odd_dma_stride_r = stride; @@ -514,6 +507,7 @@ static int dt3155_ioctl(struct inode *inode, { int minor = MINOR(inode->i_rdev); /* What device are we ioctl()'ing? */ void __user *up = (void __user *)arg; + struct dt3155_fbuffer *fb = &dt3155_status[minor].fbuffer; if (minor >= MAXBOARDS || minor < 0) return -ENODEV; @@ -572,7 +566,7 @@ static int dt3155_ioctl(struct inode *inode, case DT3155_STOP: { if (dt3155_status[minor].state & DT3155_STATE_STOP || - dt3155_status[minor].fbuffer.stop_acquire) + fb->stop_acquire) return -EBUSY; if (dt3155_status[minor].state == DT3155_STATE_IDLE) @@ -589,8 +583,8 @@ static int dt3155_ioctl(struct inode *inode, if (dt3155_status[minor].state != DT3155_STATE_IDLE) return -EBUSY; - dt3155_status[minor].fbuffer.stop_acquire = 0; - dt3155_status[minor].fbuffer.frame_count = 0; + fb->stop_acquire = 0; + fb->frame_count = 0; /* Set the MODE in the status -- we default to FRAME */ if (dt3155_status[minor].config.acq_mode == DT3155_MODE_FIELD) @@ -750,6 +744,7 @@ static ssize_t dt3155_read(struct file *filep, char __user *buf, int minor = MINOR(filep->f_dentry->d_inode->i_rdev); u32 offset; int frame_index; + struct dt3155_fbuffer *fb = &dt3155_status[minor].fbuffer; struct frame_info *frame_info; /* TODO: this should check the error flag and */ @@ -800,14 +795,14 @@ static ssize_t dt3155_read(struct file *filep, char __user *buf, } } - frame_info = &dt3155_status[minor].fbuffer.frame_info[frame_index]; + frame_info = &fb->frame_info[frame_index]; /* make this an offset */ offset = frame_info->addr - dt3155_status[minor].mem_addr; put_user(offset, (unsigned int __user *)buf); buf += sizeof(u32); - put_user(dt3155_status[minor].fbuffer.frame_count, (unsigned int __user *)buf); + put_user(fb->frame_count, (unsigned int __user *)buf); buf += sizeof(u32); put_user(dt3155_status[minor].state, (unsigned int __user *)buf); buf += sizeof(u32); |