Hi Laurent,
On Thu, Oct 11, 2012 at 01:48:12AM +0200, Laurent Pinchart wrote:
> On Wednesday 10 October 2012 23:01:41 Sakari Ailus wrote:
> > Add PHY routing configuration for both 3430 and 3630. Also add register bit
> > definitions of CSIRXFE and CAMERA_PHY_CTRL registers on OMAP 3430 and 3630,
> > respectively.
> >
> > Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
> > ---
> > drivers/media/platform/omap3isp/ispcsiphy.c | 92 ++++++++++++++++++++++++
> > drivers/media/platform/omap3isp/ispreg.h | 22 +++++++
> > 2 files changed, 114 insertions(+), 0 deletions(-)
> >
> > diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c
> > b/drivers/media/platform/omap3isp/ispcsiphy.c index 348f67e..12ae394 100644
> > --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> > +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> > @@ -32,6 +32,98 @@
> > #include "ispreg.h"
> > #include "ispcsiphy.h"
> >
> > +static void csiphy_routing_cfg_3630(struct isp_csiphy *phy, u32 iface,
> > + bool ccp2_strobe)
> > +{
> > + u32 reg = isp_reg_readl(
> > + phy->isp, OMAP3_ISP_IOMEM_3630_CONTROL_CAMERA_PHY_CTRL, 0);
> > + u32 shift, mode;
> > +
> > + switch (iface) {
> > + case ISP_INTERFACE_CCP2B_PHY1:
> > + reg &= ~OMAP3630_CONTROL_CAMERA_PHY_CTRL_CSI1_RX_SEL_PHY2;
> > + shift = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_PHY1_SHIFT;
> > + break;
> > + case ISP_INTERFACE_CSI2C_PHY1:
> > + shift = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_PHY1_SHIFT;
> > + mode = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_DPHY;
> > + break;
> > + case ISP_INTERFACE_CCP2B_PHY2:
> > + reg |= OMAP3630_CONTROL_CAMERA_PHY_CTRL_CSI1_RX_SEL_PHY2;
> > + shift = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_PHY2_SHIFT;
> > + break;
> > + case ISP_INTERFACE_CSI2A_PHY2:
> > + shift = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_PHY2_SHIFT;
> > + mode = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_DPHY;
> > + break;
> > + }
> > +
> > + /* Select data/clock or data/strobe mode for CCP2 */
> > + switch (iface) {
> > + case ISP_INTERFACE_CCP2B_PHY1:
> > + case ISP_INTERFACE_CCP2B_PHY2:
> > + if (ccp2_strobe)
> > + mode = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_CCP2_DATA_STROBE;
> > + else
> > + mode = OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_CCP2_DATA_CLOCK;
> > + }
> > +
> > + reg &= ~(OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_MASK << shift);
> > + reg |= mode << shift;
> > +
> > + isp_reg_writel(phy->isp, reg,
> > + OMAP3_ISP_IOMEM_3630_CONTROL_CAMERA_PHY_CTRL, 0);
> > +}
> > +
> > +static void csiphy_routing_cfg_3430(struct isp_csiphy *phy, u32 iface, bool
> > on,
> > + bool ccp2_strobe)
> > +{
> > + uint32_t csirxfe = OMAP343X_CONTROL_CSIRXFE_PWRDNZ
> > + | OMAP343X_CONTROL_CSIRXFE_RESET;
>
> Anything wrong with u32 ? :-)
Nothing really. uint32_t is a standard C99 type, and also allowed in the
kernel. I can use u32, too.
> (I would also align the | with the = but that's nitpicking)
Can do.
> > +
> > + /* Nothing to configure here. */
> > + if (iface == ISP_INTERFACE_CSI2A_PHY2)
> > + return;
> > +
> > + if (iface != ISP_INTERFACE_CCP2B_PHY1)
> > + return;
>
> Can't you get rid of the first check ?
Good point. I'll remove it.
> > + if (!on) {
> > + isp_reg_writel(phy->isp, 0,
> > + OMAP3_ISP_IOMEM_343X_CONTROL_CSIRXFE, 0);
> > + return;
> > + }
> > +
> > + if (ccp2_strobe)
> > + csirxfe |= OMAP343X_CONTROL_CSIRXFE_SELFORM;
> > +
> > + isp_reg_writel(phy->isp, csirxfe,
> > + OMAP3_ISP_IOMEM_343X_CONTROL_CSIRXFE, 0);
> > +}
> > +
> > +/**
> > + * Configure OMAP 3 CSI PHY routing.
> > + *
> > + * Note that the underlying routing configuration registers are part
> > + * of the control (SCM) register space and part of the CORE power
> > + * domain on both 3430 and 3630, so they will not hold their contents
> > + * in off-mode.
>
> Could you please add a sentence to explain why that's not an issue ?
This patch does not use the function for anything yet; I've kept if from the
separate from the next one that does for the reason it'd get quite big.
Should I add it to the next patch where the function is being used instead?
> > + * @phy: relevant phy device
> > + * @iface: ISP_INTERFACE_*
> > + * @on: power on or off
> > + * @ccp2_strobe: false: data/clock, true: data/strobe
> > + */
> > +static void csiphy_routing_cfg(struct isp_csiphy *phy, u32 iface, bool on,
> > + bool ccp2_strobe)
> > +{
> > + if (phy->isp->mmio_base[OMAP3_ISP_IOMEM_3630_CONTROL_CAMERA_PHY_CTRL]
> > + && on)
> > + return csiphy_routing_cfg_3630(phy, iface, ccp2_strobe);
> > + if (phy->isp->mmio_base[OMAP3_ISP_IOMEM_343X_CONTROL_CSIRXFE])
> > + return csiphy_routing_cfg_3430(phy, iface, on, ccp2_strobe);
> > +}
> > +
> > /*
> > * csiphy_lanes_config - Configuration of CSIPHY lanes.
> > *
> > diff --git a/drivers/media/platform/omap3isp/ispreg.h
> > b/drivers/media/platform/omap3isp/ispreg.h index e2c57f3..148108b 100644
> > --- a/drivers/media/platform/omap3isp/ispreg.h
> > +++ b/drivers/media/platform/omap3isp/ispreg.h
> > @@ -1583,4 +1583,26 @@
> > #define ISPCSIPHY_REG2_CCP2_SYNC_PATTERN_MASK \
> > (0x7fffff << ISPCSIPHY_REG2_CCP2_SYNC_PATTERN_SHIFT)
> >
> > +/*
> > ---------------------------------------------------------------------------
> > -- + * CONTROL registers for CSI-2 phy routing
> > + */
> > +
> > +/* OMAP343X_CONTROL_CSIRXFE */
> > +#define OMAP343X_CONTROL_CSIRXFE_CSIB_INV (1 << 7)
> > +#define OMAP343X_CONTROL_CSIRXFE_RESENABLE (1 << 8)
> > +#define OMAP343X_CONTROL_CSIRXFE_SELFORM (1 << 10)
> > +#define OMAP343X_CONTROL_CSIRXFE_PWRDNZ (1 << 12)
> > +#define OMAP343X_CONTROL_CSIRXFE_RESET (1 << 13)
> > +
> > +/* OMAP3630_CONTROL_CAMERA_PHY_CTRL */
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_PHY1_SHIFT 2
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_PHY2_SHIFT 0
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_DPHY 0x0
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_CCP2_DATA_STROBE 0x1
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_CCP2_DATA_CLOCK 0x2
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_GPI 0x3
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CAMMODE_MASK 0x3
> > +/* CCP2B: set to receive data from PHY2 instead of PHY1 */
> > +#define OMAP3630_CONTROL_CAMERA_PHY_CTRL_CSI1_RX_SEL_PHY2 (1 << 4)
> > +
>
> As the registers addresses are declared in a platform header, do you think it
> would make sense to declare those there as well ? If not I'm fine with keeping
> them here.
Do you mean control.h? The issue with that is that control.h is not located
in a directory where it could be conveniently included from. One more reason
to keep them here is that this way no-one else would accidentally start
using them.
Kind regards,
--
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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