staging: comedi: rtd520: convert DAC register defines to macros

For aesthetics, convert the defines for the various DAC registers into
macros that take the comedi channel and return the correct offset.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index 02dcb22..5fe92c4 100644 (file)
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -118,8 +118,7 @@
 #define FS_DIN_NOT_EMPTY       BIT(12) /* DIN FIFO not empty */
 #define FS_DIN_HEMPTY          BIT(13) /* DIN FIFO half empty */
 #define FS_DIN_NOT_FULL                BIT(14) /* DIN FIFO not full */
-#define LAS0_DAC1              0x0014  /* Software D/A1 Update (w) */
-#define LAS0_DAC2              0x0018  /* Software D/A2 Update (w) */
+#define LAS0_UPDATE_DAC(x)     (0x0014 + ((x) * 0x4))  /* D/Ax Update (w) */
 #define LAS0_DAC               0x0024  /* Software Simultaneous Update (w) */
 #define LAS0_PACER             0x0028  /* Software Pacer Start/Stop */
 #define LAS0_TIMER             0x002c  /* Timer Status/HDIN Software Trig. */
@@ -177,16 +176,11 @@
 #define LAS0_CGT_PAUSE         0x0144  /* Table Pause Enable */
 #define LAS0_CGT_RESET         0x0148  /* Reset Channel Gain Table */
 #define LAS0_CGT_CLEAR         0x014c  /* Clear Channel Gain Table */
-#define LAS0_DAC1_CTRL         0x0150  /* D/A1 output type/range */
-#define LAS0_DAC1_SRC          0x0154  /* D/A1 update source */
-#define LAS0_DAC1_CYCLE                0x0158  /* D/A1 cycle mode */
-#define LAS0_DAC1_RESET                0x015c  /* D/A1 FIFO reset */
-#define LAS0_DAC1_FIFO_CLEAR   0x0160  /* D/A1 FIFO clear */
-#define LAS0_DAC2_CTRL         0x0164  /* D/A2 output type/range */
-#define LAS0_DAC2_SRC          0x0168  /* D/A2 update source */
-#define LAS0_DAC2_CYCLE                0x016c  /* D/A2 cycle mode */
-#define LAS0_DAC2_RESET                0x0170  /* D/A2 FIFO reset */
-#define LAS0_DAC2_FIFO_CLEAR   0x0174  /* D/A2 FIFO clear */
+#define LAS0_DAC_CTRL(x)       (0x0150 + ((x) * 0x14)) /* D/Ax type/range */
+#define LAS0_DAC_SRC(x)                (0x0154 + ((x) * 0x14)) /* D/Ax update source */
+#define LAS0_DAC_CYCLE(x)      (0x0158 + ((x) * 0x14)) /* D/Ax cycle mode */
+#define LAS0_DAC_RESET(x)      (0x015c + ((x) * 0x14)) /* D/Ax FIFO reset */
+#define LAS0_DAC_FIFO_CLEAR(x) (0x0160 + ((x) * 0x14)) /* D/Ax FIFO clear */
 #define LAS0_ADC_SCNT_SRC      0x0178  /* A/D Sample Counter Source select */
 #define LAS0_PACER_SELECT      0x0180  /* Pacer Clock select */
 #define LAS0_SBUS0_SRC         0x0184  /* SyncBus 0 Source select */
@@ -213,8 +207,7 @@
  */
 #define LAS1_ADC_FIFO          0x0000  /* A/D FIFO (16bit) */
 #define LAS1_HDIO_FIFO         0x0004  /* HiSpd DI FIFO (16bit) */
-#define LAS1_DAC1_FIFO         0x0008  /* D/A1 FIFO (16bit) */
-#define LAS1_DAC2_FIFO         0x000c  /* D/A2 FIFO (16bit) */
+#define LAS1_DAC_FIFO(x)       (0x0008 + ((x) * 0x4))  /* D/Ax FIFO (16bit) */
 
 /*======================================================================
   Driver specific stuff (tunable)
@@ -1064,8 +1057,7 @@ static int rtd_ao_winsn(struct comedi_device *dev,
        int ret;
 
        /* Configure the output range (table index matches the range values) */
-       writew(range & 7,
-              dev->mmio + ((chan == 0) ? LAS0_DAC1_CTRL : LAS0_DAC2_CTRL));
+       writew(range & 7, dev->mmio + LAS0_DAC_CTRL(chan));
 
        for (i = 0; i < insn->n; ++i) {
                int val = data[i] << 3;
@@ -1079,9 +1071,8 @@ static int rtd_ao_winsn(struct comedi_device *dev,
                        val = data[i] << 3;
                }
 
-               writew(val, devpriv->las1 +
-                       ((chan == 0) ? LAS1_DAC1_FIFO : LAS1_DAC2_FIFO));
-               writew(0, dev->mmio + ((chan == 0) ? LAS0_DAC1 : LAS0_DAC2));
+               writew(val, devpriv->las1 + LAS1_DAC_FIFO(chan));
+               writew(0, dev->mmio + LAS0_UPDATE_DAC(chan));
 
                s->readback[chan] = data[i];
 
@@ -1156,8 +1147,8 @@ static void rtd_init_board(struct comedi_device *dev)
        writel(0, dev->mmio + LAS0_OVERRUN);
        writel(0, dev->mmio + LAS0_CGT_CLEAR);
        writel(0, dev->mmio + LAS0_ADC_FIFO_CLEAR);
-       writel(0, dev->mmio + LAS0_DAC1_RESET);
-       writel(0, dev->mmio + LAS0_DAC2_RESET);
+       writel(0, dev->mmio + LAS0_DAC_RESET(0));
+       writel(0, dev->mmio + LAS0_DAC_RESET(1));
        /* clear digital IO fifo */
        writew(0, dev->mmio + LAS0_DIO_STATUS);
        writeb((0 << 6) | 0x30, dev->mmio + LAS0_UTC_CTRL);