[media] cx23885: Altera FPGA CI interface reworked

It decreases I2C traffic.

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 9 insertions, 9 deletions

diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index cf36b9b4794e..c0e665506750 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -620,29 +620,29 @@ int netup_altera_fpga_rw(void *device, int flag, int data, int read)
 {
         struct cx23885_dev *dev = (struct cx23885_dev *)device;
         unsigned long timeout = jiffies + msecs_to_jiffies(1);
-        int mem = 0;
+        uint32_t mem = 0;
 
-        cx_set(MC417_RWD, ALT_RD | ALT_WR | ALT_CS);
+        mem = cx_read(MC417_RWD);
         if (read)
                 cx_set(MC417_OEN, ALT_DATA);
         else {
                 cx_clear(MC417_OEN, ALT_DATA);/* D0-D7 out */
-                mem = cx_read(MC417_RWD);
                 mem &= ~ALT_DATA;
                 mem |= (data & ALT_DATA);
-                cx_write(MC417_RWD, mem);
         }
 
         if (flag)
-                cx_set(MC417_RWD, ALT_AD_RG);/* ADDR */
+                mem |= ALT_AD_RG;
         else
-                cx_clear(MC417_RWD, ALT_AD_RG);/* VAL */
+                mem &= ~ALT_AD_RG;
 
-        cx_clear(MC417_RWD, ALT_CS);/* ~CS */
+        mem &= ~ALT_CS;
         if (read)
-                cx_clear(MC417_RWD, ALT_RD);
+                mem = (mem & ~ALT_RD) | ALT_WR;
         else
-                cx_clear(MC417_RWD, ALT_WR);
+                mem = (mem & ~ALT_WR) | ALT_RD;
+
+        cx_write(MC417_RWD, mem);  /* start RW cycle */
 
         for (;;) {
                 mem = cx_read(MC417_RWD);