media: rcar-csi2: Abstract PHTW and PHYPLL register offsets

Most of the registers used on the R-Car V4M CSI-2 IP are shared with the
devices already supported by the rcar-csi2 driver. Two registers which
function and layout are the same are however found on different offsets.

Prepare for adding support for R-Car V4M by storing the offset to these
two registers offsets in the device information structured. This way the
code, which is shared between the devices, can be reused when V4M
support is added.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/platform/renesas/rcar-csi2.c b/drivers/media/platform/renesas/rcar-csi2.c
index a76dab879f63eeae76a6973c21f407be34857c6e..f5e85ea23db7aae32c83b54e15d28d90093cf309 100644 (file)
--- a/drivers/media/platform/renesas/rcar-csi2.c
+++ b/drivers/media/platform/renesas/rcar-csi2.c
@@ -584,7 +584,13 @@ enum rcar_csi2_pads {
        NR_OF_RCAR_CSI2_PAD,
 };
 
+struct rcsi2_register_layout {
+       unsigned int phtw;
+       unsigned int phypll;
+};
+
 struct rcar_csi2_info {
+       const struct rcsi2_register_layout *regs;
        int (*init_phtw)(struct rcar_csi2 *priv, unsigned int mbps);
        int (*phy_post_init)(struct rcar_csi2 *priv);
        int (*start_receiver)(struct rcar_csi2 *priv,
@@ -730,7 +736,7 @@ static int rcsi2_set_phypll(struct rcar_csi2 *priv, unsigned int mbps)
            ((mbps - hsfreq_prev->mbps) <= (hsfreq->mbps - mbps)))
                hsfreq = hsfreq_prev;
 
-       rcsi2_write(priv, PHYPLL_REG, PHYPLL_HSFREQRANGE(hsfreq->reg));
+       rcsi2_write(priv, priv->info->regs->phypll, PHYPLL_HSFREQRANGE(hsfreq->reg));
 
        return 0;
 }
@@ -1455,13 +1461,13 @@ static int rcsi2_phtw_write(struct rcar_csi2 *priv, u8 data, u8 code)
 {
        unsigned int timeout;
 
-       rcsi2_write(priv, PHTW_REG,
+       rcsi2_write(priv, priv->info->regs->phtw,
                    PHTW_DWEN | PHTW_TESTDIN_DATA(data) |
                    PHTW_CWEN | PHTW_TESTDIN_CODE(code));
 
        /* Wait for DWEN and CWEN to be cleared by hardware. */
        for (timeout = 0; timeout <= 20; timeout++) {
-               if (!(rcsi2_read(priv, PHTW_REG) & (PHTW_DWEN | PHTW_CWEN)))
+               if (!(rcsi2_read(priv, priv->info->regs->phtw) & (PHTW_DWEN | PHTW_CWEN)))
                        return 0;
 
                usleep_range(1000, 2000);
@@ -1707,7 +1713,13 @@ static int rcsi2_probe_resources(struct rcar_csi2 *priv,
        return PTR_ERR_OR_ZERO(priv->rstc);
 }
 
+static const struct rcsi2_register_layout rcsi2_registers_gen3 = {
+       .phtw = PHTW_REG,
+       .phypll = PHYPLL_REG,
+};
+
 static const struct rcar_csi2_info rcar_csi2_info_r8a7795 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_h3_v3h_m3n,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
@@ -1719,6 +1731,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a7795 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a7795es2 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_h3es2,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
@@ -1730,6 +1743,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a7795es2 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a7796 = {
+       .regs = &rcsi2_registers_gen3,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
        .hsfreqrange = hsfreqrange_m3w,
@@ -1738,6 +1752,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a7796 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a77961 = {
+       .regs = &rcsi2_registers_gen3,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
        .hsfreqrange = hsfreqrange_m3w,
@@ -1746,6 +1761,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a77961 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a77965 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_h3_v3h_m3n,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
@@ -1757,6 +1773,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a77965 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a77970 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_v3m_e3,
        .phy_post_init = rcsi2_phy_post_init_v3m_e3,
        .start_receiver = rcsi2_start_receiver_gen3,
@@ -1766,6 +1783,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a77970 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a77980 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_h3_v3h_m3n,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
@@ -1776,6 +1794,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a77980 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a77990 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_v3m_e3,
        .phy_post_init = rcsi2_phy_post_init_v3m_e3,
        .start_receiver = rcsi2_start_receiver_gen3,
@@ -1785,6 +1804,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a77990 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a779a0 = {
+       .regs = &rcsi2_registers_gen3,
        .init_phtw = rcsi2_init_phtw_v3u,
        .start_receiver = rcsi2_start_receiver_gen3,
        .enter_standby = rcsi2_enter_standby_gen3,
@@ -1796,6 +1816,7 @@ static const struct rcar_csi2_info rcar_csi2_info_r8a779a0 = {
 };
 
 static const struct rcar_csi2_info rcar_csi2_info_r8a779g0 = {
+       .regs = &rcsi2_registers_gen3,
        .start_receiver = rcsi2_start_receiver_v4h,
        .use_isp = true,
        .support_cphy = true,