From: H Hartley Sweeten Date: Sat, 20 Apr 2013 00:14:06 +0000 (-0700) Subject: staging: comedi: pcl818: remove unused RTC dma support X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=aecfd1ec015397ec7a159ebb3a8c48202e0ac9a5;p=linux-beck.git staging: comedi: pcl818: 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 Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/pcl818.c b/drivers/staging/comedi/drivers/pcl818.c index 142449d7f8b4..91cb1bd6717f 100644 --- a/drivers/staging/comedi/drivers/pcl818.c +++ b/drivers/staging/comedi/drivers/pcl818.c @@ -98,15 +98,15 @@ A word or two about DMA. Driver support DMA operations at two ways: */ -#include "../comedidev.h" - #include -#include #include #include #include +#include #include +#include "../comedidev.h" + #include "comedi_fc.h" #include "8253.h" @@ -186,15 +186,6 @@ A word or two about DMA. Driver support DMA operations at two ways: #define INT_TYPE_AO3_INT 8 #endif -#ifdef unused -/* RTC stuff... */ -#define INT_TYPE_AI1_DMA_RTC 9 -#define INT_TYPE_AI3_DMA_RTC 10 - -#define RTC_IRQ 8 -#define RTC_IO_EXTENT 0x10 -#endif - #define MAGIC_DMA_WORD 0x5a5a static const struct comedi_lrange range_pcl818h_ai = { 9, { @@ -248,11 +239,6 @@ static const struct comedi_lrange range718_bipolar0_5 = { static const struct comedi_lrange range718_unipolar2 = { 1, {UNI_RANGE(2),} }; static const struct comedi_lrange range718_unipolar1 = { 1, {BIP_RANGE(1),} }; -#ifdef unused -static int RTC_lock; /* RTC lock */ -static int RTC_timer_lock; /* RTC int lock */ -#endif - struct pcl818_board { const char *name; /* driver name */ @@ -277,22 +263,11 @@ struct pcl818_board { struct pcl818_private { unsigned int dma; /* used DMA, 0=don't use DMA */ - int dma_rtc; /* 1=RTC used with DMA, 0=no RTC alloc */ unsigned int io_range; -#ifdef unused - unsigned long rtc_iobase; /* RTC port region */ - unsigned int rtc_iosize; - unsigned int rtc_irq; - struct timer_list rtc_irq_timer; /* timer for RTC sanity check */ - unsigned long rtc_freq; /* RTC int freq */ - int rtc_irq_blocked; /* 1=we now do AI with DMA&RTC */ -#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 */ @@ -342,12 +317,6 @@ static int pcl818_ai_cancel(struct comedi_device *dev, 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); -static void rtc_dropped_irq(unsigned long data); -static int rtc_setfreq_irq(int freq); -#endif - /* ============================================================================== ANALOG INPUT MODE0, 818 cards, slow version @@ -610,113 +579,6 @@ static irqreturn_t interrupt_pcl818_ai_mode13_dma(int irq, void *d) return IRQ_HANDLED; } -#ifdef unused -/* -============================================================================== - analog input dma mode 1 & 3 over RTC, 818 cards -*/ -static irqreturn_t interrupt_pcl818_ai_mode13_dma_rtc(int irq, void *d) -{ - struct comedi_device *dev = d; - struct pcl818_private *devpriv = dev->private; - struct comedi_subdevice *s = &dev->subdevices[0]; - unsigned long tmp; - unsigned int top1, top2, i, bufptr; - long ofs_dats; - short *dmabuf = (short *)devpriv->dmabuf[0]; - - /* outb(2,0x378); */ - switch (devpriv->ai_mode) { - case INT_TYPE_AI1_DMA_RTC: - case INT_TYPE_AI3_DMA_RTC: - tmp = (CMOS_READ(RTC_INTR_FLAGS) & 0xF0); - mod_timer(&devpriv->rtc_irq_timer, - jiffies + HZ / devpriv->rtc_freq + 2 * HZ / 100); - - for (i = 0; i < 10; i++) { - top1 = get_dma_residue(devpriv->dma); - top2 = get_dma_residue(devpriv->dma); - if (top1 == top2) - break; - } - - if (top1 != top2) - return IRQ_HANDLED; - top1 = devpriv->hwdmasize[0] - top1; /* where is now DMA in buffer */ - top1 >>= 1; - ofs_dats = top1 - devpriv->last_top_dma; /* new samples from last call */ - if (ofs_dats < 0) - ofs_dats = (devpriv->dmasamplsize) + ofs_dats; - if (!ofs_dats) - return IRQ_HANDLED; /* exit=no new samples from last call */ - /* obsluz data */ - i = devpriv->last_top_dma - 1; - i &= (devpriv->dmasamplsize - 1); - - if (dmabuf[i] != MAGIC_DMA_WORD) { /* DMA overflow! */ - comedi_error(dev, "A/D mode1/3 DMA buffer overflow!"); - /* printk("I %d dmabuf[i] %d %d\n",i,dmabuf[i],devpriv->dmasamplsize); */ - pcl818_ai_cancel(dev, s); - s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR; - comedi_event(dev, s); - return IRQ_HANDLED; - } - /* printk("r %ld ",ofs_dats); */ - - bufptr = devpriv->last_top_dma; - - for (i = 0; i < ofs_dats; i++) { - if ((dmabuf[bufptr] & 0xf) != devpriv->act_chanlist[devpriv->act_chanlist_pos]) { /* dropout! */ - printk - ("comedi: A/D mode1/3 DMA - channel dropout %d!=%d !\n", - (dmabuf[bufptr] & 0xf), - devpriv-> - act_chanlist[devpriv->act_chanlist_pos]); - pcl818_ai_cancel(dev, s); - s->async->events |= - COMEDI_CB_EOA | COMEDI_CB_ERROR; - comedi_event(dev, s); - return IRQ_HANDLED; - } - - comedi_buf_put(s->async, dmabuf[bufptr++] >> 4); /* get one sample */ - bufptr &= (devpriv->dmasamplsize - 1); - - devpriv->act_chanlist_pos++; - if (devpriv->act_chanlist_pos >= - devpriv->act_chanlist_len) { - devpriv->act_chanlist_pos = 0; - } - s->async->cur_chan++; - if (s->async->cur_chan >= devpriv->ai_n_chan) { - s->async->cur_chan = 0; - devpriv->ai_act_scan--; - } - - if (!devpriv->neverending_ai) - if (devpriv->ai_act_scan == 0) { /* all data sampled */ - pcl818_ai_cancel(dev, s); - s->async->events |= COMEDI_CB_EOA; - comedi_event(dev, s); - /* printk("done int ai13 dma\n"); */ - return IRQ_HANDLED; - } - } - - devpriv->last_top_dma = bufptr; - bufptr--; - bufptr &= (devpriv->dmasamplsize - 1); - dmabuf[bufptr] = MAGIC_DMA_WORD; - comedi_event(dev, s); - /* outb(0,0x378); */ - return IRQ_HANDLED; - } - - /* outb(0,0x378); */ - return IRQ_HANDLED; -} -#endif - /* ============================================================================== analog input interrupt mode 1 & 3, 818HD/HG cards @@ -900,49 +762,6 @@ static void pcl818_ai_mode13dma_int(int mode, struct comedi_device *dev, }; } -#ifdef unused -/* -============================================================================== - ANALOG INPUT MODE 1 or 3 DMA rtc, 818 cards -*/ -static void pcl818_ai_mode13dma_rtc(int mode, struct comedi_device *dev, - struct comedi_subdevice *s) -{ - struct pcl818_private *devpriv = dev->private; - unsigned int flags; - short *pole; - - set_dma_mode(devpriv->dma, DMA_MODE_READ | DMA_AUTOINIT); - flags = claim_dma_lock(); - clear_dma_ff(devpriv->dma); - set_dma_addr(devpriv->dma, devpriv->hwdmaptr[0]); - set_dma_count(devpriv->dma, devpriv->hwdmasize[0]); - release_dma_lock(flags); - enable_dma(devpriv->dma); - devpriv->last_top_dma = 0; /* devpriv->hwdmasize[0]; */ - pole = (short *)devpriv->dmabuf[0]; - devpriv->dmasamplsize = devpriv->hwdmasize[0] / 2; - pole[devpriv->dmasamplsize - 1] = MAGIC_DMA_WORD; -#ifdef unused - devpriv->rtc_freq = rtc_setfreq_irq(2048); - devpriv->rtc_irq_timer.expires = - jiffies + HZ / devpriv->rtc_freq + 2 * HZ / 100; - devpriv->rtc_irq_timer.data = (unsigned long)dev; - devpriv->rtc_irq_timer.function = rtc_dropped_irq; - - add_timer(&devpriv->rtc_irq_timer); -#endif - - if (mode == 1) { - devpriv->int818_mode = INT_TYPE_AI1_DMA_RTC; - outb(0x07 | (dev->irq << 4), dev->iobase + PCL818_CONTROL); /* Pacer+DMA */ - } else { - devpriv->int818_mode = INT_TYPE_AI3_DMA_RTC; - outb(0x06 | (dev->irq << 4), dev->iobase + PCL818_CONTROL); /* Ext trig+DMA */ - }; -} -#endif - /* ============================================================================== ANALOG INPUT MODE 1 or 3, 818 cards @@ -956,7 +775,7 @@ static int pcl818_ai_cmd_mode(int mode, struct comedi_device *dev, unsigned int seglen; dev_dbg(dev->class_dev, "pcl818_ai_cmd_mode()\n"); - if ((!dev->irq) && (!devpriv->dma_rtc)) { + if (!dev->irq) { comedi_error(dev, "IRQ not defined!"); return -EINVAL; } @@ -1005,15 +824,7 @@ static int pcl818_ai_cmd_mode(int mode, struct comedi_device *dev, switch (devpriv->dma) { case 1: /* DMA */ case 3: - if (devpriv->dma_rtc == 0) - pcl818_ai_mode13dma_int(mode, dev, s); -#ifdef unused - else - pcl818_ai_mode13dma_rtc(mode, dev, s); -#else - else - return -EINVAL; -#endif + pcl818_ai_mode13dma_int(mode, dev, s); break; case 0: if (!devpriv->usefifo) { @@ -1047,97 +858,10 @@ static int pcl818_ai_cmd_mode(int mode, struct comedi_device *dev, start_pacer(dev, mode, divisor1, divisor2); -#ifdef unused - switch (devpriv->ai_mode) { - case INT_TYPE_AI1_DMA_RTC: - case INT_TYPE_AI3_DMA_RTC: - set_rtc_irq_bit(1); /* start RTC */ - break; - } -#endif dev_dbg(dev->class_dev, "pcl818_ai_cmd_mode() end\n"); return 0; } -#ifdef unused -/* -============================================================================== - ANALOG OUTPUT MODE 1 or 3, 818 cards -*/ -#ifdef PCL818_MODE13_AO -static int pcl818_ao_mode13(int mode, struct comedi_device *dev, - struct comedi_subdevice *s, comedi_trig *it) -{ - struct pcl818_private *devpriv = dev->private; - int divisor1 = 0, divisor2 = 0; - - if (!dev->irq) { - comedi_error(dev, "IRQ not defined!"); - return -EINVAL; - } - - if (devpriv->irq_blocked) - return -EBUSY; - - start_pacer(dev, -1, 0, 0); /* stop pacer */ - - devpriv->int13_act_scan = it->n; - devpriv->int13_act_chan = 0; - devpriv->irq_blocked = 1; - devpriv->irq_was_now_closed = 0; - devpriv->neverending_ai = 0; - devpriv->act_chanlist_pos = 0; - - if (mode == 1) { - i8253_cascade_ns_to_timer(devpriv->i8253_osc_base, &divisor1, - &divisor2, &it->trigvar, - TRIG_ROUND_NEAREST); - if (divisor1 == 1) { /* PCL818 crash if any divisor is set to 1 */ - divisor1 = 2; - divisor2 /= 2; - } - if (divisor2 == 1) { - divisor2 = 2; - divisor1 /= 2; - } - } - - outb(0, dev->iobase + PCL818_CNTENABLE); /* enable pacer */ - if (mode == 1) { - devpriv->int818_mode = INT_TYPE_AO1_INT; - outb(0x83 | (dev->irq << 4), dev->iobase + PCL818_CONTROL); /* Pacer+IRQ */ - } else { - devpriv->int818_mode = INT_TYPE_AO3_INT; - outb(0x82 | (dev->irq << 4), dev->iobase + PCL818_CONTROL); /* Ext trig+IRQ */ - }; - - start_pacer(dev, mode, divisor1, divisor2); - - return 0; -} - -/* -============================================================================== - ANALOG OUTPUT MODE 1, 818 cards -*/ -static int pcl818_ao_mode1(struct comedi_device *dev, - struct comedi_subdevice *s, comedi_trig *it) -{ - return pcl818_ao_mode13(1, dev, s, it); -} - -/* -============================================================================== - ANALOG OUTPUT MODE 3, 818 cards -*/ -static int pcl818_ao_mode3(struct comedi_device *dev, - struct comedi_subdevice *s, comedi_trig *it) -{ - return pcl818_ao_mode13(3, dev, s, it); -} -#endif -#endif - /* ============================================================================== Start/stop pacer onboard pacer @@ -1391,12 +1115,6 @@ static int pcl818_ai_cancel(struct comedi_device *dev, devpriv->irq_was_now_closed = 1; switch (devpriv->ai_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: if (devpriv->neverending_ai || @@ -1499,96 +1217,6 @@ static void pcl818_reset(struct comedi_device *dev) } } -#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; -} - -/* -============================================================================== - Restart RTC if something stop it (xntpd every 11 mins or large IDE transfers) -*/ -static void rtc_dropped_irq(unsigned long data) -{ - struct comedi_device *dev = (void *)data; - struct pcl818_private *devpriv = dev->private; - unsigned long flags, tmp; - - switch (devpriv->int818_mode) { - case INT_TYPE_AI1_DMA_RTC: - case INT_TYPE_AI3_DMA_RTC: - mod_timer(&devpriv->rtc_irq_timer, - jiffies + HZ / devpriv->rtc_freq + 2 * HZ / 100); - save_flags(flags); - cli(); - tmp = (CMOS_READ(RTC_INTR_FLAGS) & 0xF0); /* restart */ - restore_flags(flags); - break; - } -} - -/* -============================================================================== - Set frequency of interrupts from RTC -*/ -static int rtc_setfreq_irq(int freq) -{ - int tmp = 0; - int rtc_freq; - unsigned char val; - unsigned long flags; - - if (freq < 2) - freq = 2; - if (freq > 8192) - freq = 8192; - - while (freq > (1 << tmp)) - tmp++; - - rtc_freq = 1 << tmp; - - save_flags(flags); - cli(); - val = CMOS_READ(RTC_FREQ_SELECT) & 0xf0; - val |= (16 - tmp); - CMOS_WRITE(val, RTC_FREQ_SELECT); - restore_flags(flags); - return rtc_freq; -} -#endif - static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it) { const struct pcl818_board *board = comedi_board(dev); @@ -1652,42 +1280,10 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it) devpriv->irq_blocked = 0; /* number of subdevice which use IRQ */ devpriv->ai_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_resource(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++; - if (!request_irq(RTC_IRQ, interrupt_pcl818_ai_mode13_dma_rtc, 0, - "pcl818 DMA (RTC)", dev)) { - devpriv->dma_rtc = 1; - devpriv->rtc_irq = RTC_IRQ; - printk(KERN_DEBUG "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; - } - } - -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 */ dma = it->options[2]; @@ -1710,15 +1306,12 @@ no_rtc: devpriv->hwdmaptr[0] = virt_to_bus((void *)devpriv->dmabuf[0]); 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]) - 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]) + 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: @@ -1748,7 +1341,7 @@ no_dma: s->range_table = board->ai_range_type; s->cancel = pcl818_ai_cancel; s->insn_read = pcl818_ai_insn_read; - if ((irq) || (devpriv->dma_rtc)) { + if (irq) { dev->read_subdev = s; s->subdev_flags |= SDF_CMD_READ; s->do_cmdtest = ai_cmdtest; @@ -1805,14 +1398,6 @@ no_dma: s->range_table = board->ao_range_type; s->insn_read = pcl818_ao_insn_read; s->insn_write = pcl818_ao_insn_write; -#ifdef unused -#ifdef PCL818_MODE13_AO - if (irq) { - s->trig[1] = pcl818_ao_mode1; - s->trig[3] = pcl818_ao_mode3; - } -#endif -#endif if (board->is_818) { if ((it->options[4] == 1) || (it->options[4] == 10)) s->range_table = &range_unipolar10; @@ -1886,17 +1471,6 @@ static void pcl818_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); }