diff options
author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-04-20 00:14:30 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-22 17:23:37 (GMT) |
commit | a4b47eeac2fe1687a6af0d30509a39b23a466cf6 (patch) | |
tree | 9b1f40b5be57fdc673f1676215563442b83ce605 | |
parent | aecfd1ec015397ec7a159ebb3a8c48202e0ac9a5 (diff) | |
download | linux-a4b47eeac2fe1687a6af0d30509a39b23a466cf6.tar.xz |
staging: comedi: pcl816: remove unused RTC dma support
All the RTC dma support code in this driver is #ifdef'ed out.
Remove the unused code to assist in cleaning up this driver.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/staging/comedi/drivers/pcl816.c | 146 |
1 files changed, 11 insertions, 135 deletions
diff --git a/drivers/staging/comedi/drivers/pcl816.c b/drivers/staging/comedi/drivers/pcl816.c index 10e0960..91bd207 100644 --- a/drivers/staging/comedi/drivers/pcl816.c +++ b/drivers/staging/comedi/drivers/pcl816.c @@ -35,10 +35,10 @@ Configuration Options: #include "../comedidev.h" #include <linux/ioport.h> -#include <linux/mc146818rtc.h> #include <linux/gfp.h> #include <linux/delay.h> #include <linux/io.h> +#include <linux/interrupt.h> #include <asm/dma.h> #include "comedi_fc.h" @@ -82,14 +82,6 @@ Configuration Options: #define INT_TYPE_AI1_DMA 2 #define INT_TYPE_AI3_INT 4 #define INT_TYPE_AI3_DMA 5 -#ifdef unused -#define INT_TYPE_AI1_DMA_RTC 9 -#define INT_TYPE_AI3_DMA_RTC 10 - -/* RTC stuff... */ -#define RTC_IRQ 8 -#define RTC_IO_EXTENT 0x10 -#endif #define MAGIC_DMA_WORD 0x5a5a @@ -126,26 +118,14 @@ struct pcl816_board { int i8254_osc_base; /* 1/frequency of on board oscilator in ns */ }; -#ifdef unused -static int RTC_lock; /* RTC lock */ -static int RTC_timer_lock; /* RTC int lock */ -#endif - struct pcl816_private { unsigned int dma; /* used DMA, 0=don't use DMA */ - int dma_rtc; /* 1=RTC used with DMA, 0=no RTC alloc */ -#ifdef unused - unsigned long rtc_iobase; /* RTC port region */ - unsigned int rtc_iosize; - unsigned int rtc_irq; -#endif unsigned long dmabuf[2]; /* pointers to begin of DMA buffers */ unsigned int dmapages[2]; /* len of DMA buffers in PAGE_SIZEs */ unsigned int hwdmaptr[2]; /* hardware address of DMA buffers */ unsigned int hwdmasize[2]; /* len of DMA buffers in Bytes */ unsigned int dmasamplsize; /* size in samples hwdmasize[0]/2 */ - unsigned int last_top_dma; /* DMA pointer in last RTC int */ int next_dma_buf; /* which DMA buffer will be used next round */ long dma_runs_to_end; /* how many we must permorm DMA transfer to end of record */ unsigned long last_dma_run; /* how many bytes we must transfer on last DMA page */ @@ -154,9 +134,6 @@ struct pcl816_private { unsigned char ai_neverending; /* if=1, then we do neverending record (you must use cancel()) */ int irq_free; /* 1=have allocated IRQ */ int irq_blocked; /* 1=IRQ now uses any subdev */ -#ifdef unused - int rtc_irq_blocked; /* 1=we now do AI with DMA&RTC */ -#endif int irq_was_now_closed; /* when IRQ finish, there's stored int816_mode for last interrupt */ int int816_mode; /* who now uses IRQ - 1=AI1 int, 2=AI1 dma, 3=AI3 int, 4AI3 dma */ struct comedi_subdevice *last_int_sub; /* ptr to subdevice which now finish */ @@ -167,10 +144,6 @@ struct pcl816_private { unsigned int ai_n_chan; /* how many channels per scan */ unsigned int ai_poll_ptr; /* how many sampes transfer poll */ struct comedi_subdevice *sub_ai; /* ptr to AI subdevice */ -#ifdef unused - struct timer_list rtc_irq_timer; /* timer for RTC sanity check */ - unsigned long rtc_freq; /* RTC int freq */ -#endif }; /* @@ -186,9 +159,6 @@ static int pcl816_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s); static void start_pacer(struct comedi_device *dev, int mode, unsigned int divisor1, unsigned int divisor2); -#ifdef unused -static int set_rtc_irq_bit(unsigned char bit); -#endif static int pcl816_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, @@ -718,12 +688,6 @@ static int pcl816_ai_cancel(struct comedi_device *dev, if (devpriv->irq_blocked > 0) { switch (devpriv->int816_mode) { -#ifdef unused - case INT_TYPE_AI1_DMA_RTC: - case INT_TYPE_AI3_DMA_RTC: - set_rtc_irq_bit(0); /* stop RTC */ - del_timer(&devpriv->rtc_irq_timer); -#endif case INT_TYPE_AI1_DMA: case INT_TYPE_AI3_DMA: disable_dma(devpriv->dma); @@ -939,43 +903,6 @@ setup_channel_list(struct comedi_device *dev, dev->iobase + PCL816_MUX); } -#ifdef unused -/* -============================================================================== - Enable(1)/disable(0) periodic interrupts from RTC -*/ -static int set_rtc_irq_bit(unsigned char bit) -{ - unsigned char val; - unsigned long flags; - - if (bit == 1) { - RTC_timer_lock++; - if (RTC_timer_lock > 1) - return 0; - } else { - RTC_timer_lock--; - if (RTC_timer_lock < 0) - RTC_timer_lock = 0; - if (RTC_timer_lock > 0) - return 0; - } - - save_flags(flags); - cli(); - val = CMOS_READ(RTC_CONTROL); - if (bit) - val |= RTC_PIE; - else - val &= ~RTC_PIE; - - CMOS_WRITE(val, RTC_CONTROL); - CMOS_READ(RTC_INTR_FLAGS); - restore_flags(flags); - return 0; -} -#endif - static int pcl816_attach(struct comedi_device *dev, struct comedi_devconfig *it) { const struct pcl816_board *board = comedi_board(dev); @@ -1033,47 +960,10 @@ static int pcl816_attach(struct comedi_device *dev, struct comedi_devconfig *it) devpriv->irq_blocked = 0; /* number of subdevice which use IRQ */ devpriv->int816_mode = 0; /* mode of irq */ -#ifdef unused - /* grab RTC for DMA operations */ - devpriv->dma_rtc = 0; - if (it->options[2] > 0) { /* we want to use DMA */ - if (RTC_lock == 0) { - ret = __comedi_request_region(dev, RTC_PORT(0), - RTC_IO_EXTENT); - if (ret) - goto no_rtc; - } - devpriv->rtc_iobase = RTC_PORT(0); - devpriv->rtc_iosize = RTC_IO_EXTENT; - RTC_lock++; -#ifdef UNTESTED_CODE - if (!request_irq(RTC_IRQ, interrupt_pcl816_ai_mode13_dma_rtc, 0, - "pcl816 DMA (RTC)", dev)) { - devpriv->dma_rtc = 1; - devpriv->rtc_irq = RTC_IRQ; - printk(", dma_irq=%u", devpriv->rtc_irq); - } else { - RTC_lock--; - if (RTC_lock == 0) { - if (devpriv->rtc_iobase) - release_region(devpriv->rtc_iobase, - devpriv->rtc_iosize); - } - devpriv->rtc_iobase = 0; - devpriv->rtc_iosize = 0; - } -#else - printk("pcl816: RTC code missing"); -#endif - - } - -no_rtc: -#endif /* grab our DMA */ dma = 0; devpriv->dma = dma; - if ((devpriv->irq_free == 0) && (devpriv->dma_rtc == 0)) + if (!devpriv->irq_free) goto no_dma; /* if we haven't IRQ, we can't use DMA */ if (board->DMAbits != 0) { /* board support DMA */ @@ -1110,19 +1000,16 @@ no_rtc: devpriv->hwdmasize[0] = (1 << pages) * PAGE_SIZE; /* printk("%d %d %ld, ",devpriv->dmapages[0],devpriv->hwdmasize[0],PAGE_SIZE); */ - if (devpriv->dma_rtc == 0) { /* we must do duble buff :-( */ - devpriv->dmabuf[1] = __get_dma_pages(GFP_KERNEL, pages); - if (!devpriv->dmabuf[1]) { - printk(KERN_ERR - ", unable to allocate DMA buffer, " - "FAIL!\n"); - return -EBUSY; - } - devpriv->dmapages[1] = pages; - devpriv->hwdmaptr[1] = - virt_to_bus((void *)devpriv->dmabuf[1]); - devpriv->hwdmasize[1] = (1 << pages) * PAGE_SIZE; + devpriv->dmabuf[1] = __get_dma_pages(GFP_KERNEL, pages); + if (!devpriv->dmabuf[1]) { + printk(KERN_ERR + ", unable to allocate DMA buffer, " + "FAIL!\n"); + return -EBUSY; } + devpriv->dmapages[1] = pages; + devpriv->hwdmaptr[1] = virt_to_bus((void *)devpriv->dmabuf[1]); + devpriv->hwdmasize[1] = (1 << pages) * PAGE_SIZE; } no_dma: @@ -1206,17 +1093,6 @@ static void pcl816_detach(struct comedi_device *dev) free_pages(devpriv->dmabuf[0], devpriv->dmapages[0]); if (devpriv->dmabuf[1]) free_pages(devpriv->dmabuf[1], devpriv->dmapages[1]); -#ifdef unused - if (devpriv->rtc_irq) - free_irq(devpriv->rtc_irq, dev); - if ((devpriv->dma_rtc) && (RTC_lock == 1)) { - if (devpriv->rtc_iobase) - release_region(devpriv->rtc_iobase, - devpriv->rtc_iosize); - } - if (devpriv->dma_rtc) - RTC_lock--; -#endif } comedi_legacy_detach(dev); } |