V4L/DVB: V4L: dm644x_ccdc: Add Suspend/Resume Support

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Muralidharan Karicheri <mkaricheri@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 115 insertions, 1 deletions

diff --git a/drivers/media/video/davinci/dm644x_ccdc.c b/drivers/media/video/davinci/dm644x_ccdc.c
index a1d353125c84..490aafb34e2f 100644
--- a/drivers/media/video/davinci/dm644x_ccdc.c
+++ b/drivers/media/video/davinci/dm644x_ccdc.c
@@ -101,6 +101,9 @@ static u32 ccdc_raw_bayer_pix_formats[] =
 static u32 ccdc_raw_yuv_pix_formats[] =
         {V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_YUYV};
 
+/* CCDC Save/Restore context */
+static u32 ccdc_ctx[CCDC_REG_END / sizeof(u32)];
+
 /* register access routines */
 static inline u32 regr(u32 offset)
 {
@@ -846,6 +849,87 @@ static int ccdc_set_hw_if_params(struct vpfe_hw_if_param *params)
         return 0;
 }
 
+static void ccdc_save_context(void)
+{
+        ccdc_ctx[CCDC_PCR >> 2] = regr(CCDC_PCR);
+        ccdc_ctx[CCDC_SYN_MODE >> 2] = regr(CCDC_SYN_MODE);
+        ccdc_ctx[CCDC_HD_VD_WID >> 2] = regr(CCDC_HD_VD_WID);
+        ccdc_ctx[CCDC_PIX_LINES >> 2] = regr(CCDC_PIX_LINES);
+        ccdc_ctx[CCDC_HORZ_INFO >> 2] = regr(CCDC_HORZ_INFO);
+        ccdc_ctx[CCDC_VERT_START >> 2] = regr(CCDC_VERT_START);
+        ccdc_ctx[CCDC_VERT_LINES >> 2] = regr(CCDC_VERT_LINES);
+        ccdc_ctx[CCDC_CULLING >> 2] = regr(CCDC_CULLING);
+        ccdc_ctx[CCDC_HSIZE_OFF >> 2] = regr(CCDC_HSIZE_OFF);
+        ccdc_ctx[CCDC_SDOFST >> 2] = regr(CCDC_SDOFST);
+        ccdc_ctx[CCDC_SDR_ADDR >> 2] = regr(CCDC_SDR_ADDR);
+        ccdc_ctx[CCDC_CLAMP >> 2] = regr(CCDC_CLAMP);
+        ccdc_ctx[CCDC_DCSUB >> 2] = regr(CCDC_DCSUB);
+        ccdc_ctx[CCDC_COLPTN >> 2] = regr(CCDC_COLPTN);
+        ccdc_ctx[CCDC_BLKCMP >> 2] = regr(CCDC_BLKCMP);
+        ccdc_ctx[CCDC_FPC >> 2] = regr(CCDC_FPC);
+        ccdc_ctx[CCDC_FPC_ADDR >> 2] = regr(CCDC_FPC_ADDR);
+        ccdc_ctx[CCDC_VDINT >> 2] = regr(CCDC_VDINT);
+        ccdc_ctx[CCDC_ALAW >> 2] = regr(CCDC_ALAW);
+        ccdc_ctx[CCDC_REC656IF >> 2] = regr(CCDC_REC656IF);
+        ccdc_ctx[CCDC_CCDCFG >> 2] = regr(CCDC_CCDCFG);
+        ccdc_ctx[CCDC_FMTCFG >> 2] = regr(CCDC_FMTCFG);
+        ccdc_ctx[CCDC_FMT_HORZ >> 2] = regr(CCDC_FMT_HORZ);
+        ccdc_ctx[CCDC_FMT_VERT >> 2] = regr(CCDC_FMT_VERT);
+        ccdc_ctx[CCDC_FMT_ADDR0 >> 2] = regr(CCDC_FMT_ADDR0);
+        ccdc_ctx[CCDC_FMT_ADDR1 >> 2] = regr(CCDC_FMT_ADDR1);
+        ccdc_ctx[CCDC_FMT_ADDR2 >> 2] = regr(CCDC_FMT_ADDR2);
+        ccdc_ctx[CCDC_FMT_ADDR3 >> 2] = regr(CCDC_FMT_ADDR3);
+        ccdc_ctx[CCDC_FMT_ADDR4 >> 2] = regr(CCDC_FMT_ADDR4);
+        ccdc_ctx[CCDC_FMT_ADDR5 >> 2] = regr(CCDC_FMT_ADDR5);
+        ccdc_ctx[CCDC_FMT_ADDR6 >> 2] = regr(CCDC_FMT_ADDR6);
+        ccdc_ctx[CCDC_FMT_ADDR7 >> 2] = regr(CCDC_FMT_ADDR7);
+        ccdc_ctx[CCDC_PRGEVEN_0 >> 2] = regr(CCDC_PRGEVEN_0);
+        ccdc_ctx[CCDC_PRGEVEN_1 >> 2] = regr(CCDC_PRGEVEN_1);
+        ccdc_ctx[CCDC_PRGODD_0 >> 2] = regr(CCDC_PRGODD_0);
+        ccdc_ctx[CCDC_PRGODD_1 >> 2] = regr(CCDC_PRGODD_1);
+        ccdc_ctx[CCDC_VP_OUT >> 2] = regr(CCDC_VP_OUT);
+}
+
+static void ccdc_restore_context(void)
+{
+        regw(ccdc_ctx[CCDC_SYN_MODE >> 2], CCDC_SYN_MODE);
+        regw(ccdc_ctx[CCDC_HD_VD_WID >> 2], CCDC_HD_VD_WID);
+        regw(ccdc_ctx[CCDC_PIX_LINES >> 2], CCDC_PIX_LINES);
+        regw(ccdc_ctx[CCDC_HORZ_INFO >> 2], CCDC_HORZ_INFO);
+        regw(ccdc_ctx[CCDC_VERT_START >> 2], CCDC_VERT_START);
+        regw(ccdc_ctx[CCDC_VERT_LINES >> 2], CCDC_VERT_LINES);
+        regw(ccdc_ctx[CCDC_CULLING >> 2], CCDC_CULLING);
+        regw(ccdc_ctx[CCDC_HSIZE_OFF >> 2], CCDC_HSIZE_OFF);
+        regw(ccdc_ctx[CCDC_SDOFST >> 2], CCDC_SDOFST);
+        regw(ccdc_ctx[CCDC_SDR_ADDR >> 2], CCDC_SDR_ADDR);
+        regw(ccdc_ctx[CCDC_CLAMP >> 2], CCDC_CLAMP);
+        regw(ccdc_ctx[CCDC_DCSUB >> 2], CCDC_DCSUB);
+        regw(ccdc_ctx[CCDC_COLPTN >> 2], CCDC_COLPTN);
+        regw(ccdc_ctx[CCDC_BLKCMP >> 2], CCDC_BLKCMP);
+        regw(ccdc_ctx[CCDC_FPC >> 2], CCDC_FPC);
+        regw(ccdc_ctx[CCDC_FPC_ADDR >> 2], CCDC_FPC_ADDR);
+        regw(ccdc_ctx[CCDC_VDINT >> 2], CCDC_VDINT);
+        regw(ccdc_ctx[CCDC_ALAW >> 2], CCDC_ALAW);
+        regw(ccdc_ctx[CCDC_REC656IF >> 2], CCDC_REC656IF);
+        regw(ccdc_ctx[CCDC_CCDCFG >> 2], CCDC_CCDCFG);
+        regw(ccdc_ctx[CCDC_FMTCFG >> 2], CCDC_FMTCFG);
+        regw(ccdc_ctx[CCDC_FMT_HORZ >> 2], CCDC_FMT_HORZ);
+        regw(ccdc_ctx[CCDC_FMT_VERT >> 2], CCDC_FMT_VERT);
+        regw(ccdc_ctx[CCDC_FMT_ADDR0 >> 2], CCDC_FMT_ADDR0);
+        regw(ccdc_ctx[CCDC_FMT_ADDR1 >> 2], CCDC_FMT_ADDR1);
+        regw(ccdc_ctx[CCDC_FMT_ADDR2 >> 2], CCDC_FMT_ADDR2);
+        regw(ccdc_ctx[CCDC_FMT_ADDR3 >> 2], CCDC_FMT_ADDR3);
+        regw(ccdc_ctx[CCDC_FMT_ADDR4 >> 2], CCDC_FMT_ADDR4);
+        regw(ccdc_ctx[CCDC_FMT_ADDR5 >> 2], CCDC_FMT_ADDR5);
+        regw(ccdc_ctx[CCDC_FMT_ADDR6 >> 2], CCDC_FMT_ADDR6);
+        regw(ccdc_ctx[CCDC_FMT_ADDR7 >> 2], CCDC_FMT_ADDR7);
+        regw(ccdc_ctx[CCDC_PRGEVEN_0 >> 2], CCDC_PRGEVEN_0);
+        regw(ccdc_ctx[CCDC_PRGEVEN_1 >> 2], CCDC_PRGEVEN_1);
+        regw(ccdc_ctx[CCDC_PRGODD_0 >> 2], CCDC_PRGODD_0);
+        regw(ccdc_ctx[CCDC_PRGODD_1 >> 2], CCDC_PRGODD_1);
+        regw(ccdc_ctx[CCDC_VP_OUT >> 2], CCDC_VP_OUT);
+        regw(ccdc_ctx[CCDC_PCR >> 2], CCDC_PCR);
+}
 static struct ccdc_hw_device ccdc_hw_dev = {
         .name = "DM6446 CCDC",
         .owner = THIS_MODULE,
@@ -954,10 +1038,40 @@ static int dm644x_ccdc_remove(struct platform_device *pdev)
         return 0;
 }
 
+static int dm644x_ccdc_suspend(struct device *dev)
+{
+        /* Save CCDC context */
+        ccdc_save_context();
+        /* Disable CCDC */
+        ccdc_enable(0);
+        /* Disable both master and slave clock */
+        clk_disable(ccdc_cfg.mclk);
+        clk_disable(ccdc_cfg.sclk);
+
+        return 0;
+}
+
+static int dm644x_ccdc_resume(struct device *dev)
+{
+        /* Enable both master and slave clock */
+        clk_enable(ccdc_cfg.mclk);
+        clk_enable(ccdc_cfg.sclk);
+        /* Restore CCDC context */
+        ccdc_restore_context();
+
+        return 0;
+}
+
+static const struct dev_pm_ops dm644x_ccdc_pm_ops = {
+        .suspend = dm644x_ccdc_suspend,
+        .resume = dm644x_ccdc_resume,
+};
+
 static struct platform_driver dm644x_ccdc_driver = {
         .driver = {
                 .name   = "dm644x_ccdc",
                 .owner = THIS_MODULE,
+                .pm = &dm644x_ccdc_pm_ops,
         },
         .remove = __devexit_p(dm644x_ccdc_remove),
         .probe = dm644x_ccdc_probe,
diff --git a/drivers/media/video/davinci/dm644x_ccdc_regs.h b/drivers/media/video/davinci/dm644x_ccdc_regs.h
index b18d166f1815..90370e414e2c 100644
--- a/drivers/media/video/davinci/dm644x_ccdc_regs.h
+++ b/drivers/media/video/davinci/dm644x_ccdc_regs.h
@@ -59,7 +59,7 @@
 #define CCDC_PRGODD_0                           0x8c
 #define CCDC_PRGODD_1                           0x90
 #define CCDC_VP_OUT                             0x94
-
+#define CCDC_REG_END                            0x98
 
 /***************************************************************
 *       Define for various register bit mask and shifts for CCDC