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Message-Id: <20230206131620.2758724-11-mkl@pengutronix.de>
Date: Mon, 6 Feb 2023 14:15:43 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
kernel@...gutronix.de,
Geert Uytterhoeven <geert+renesas@...der.be>,
Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 10/47] can: rcar_canfd: Add support for R-Car Gen4
From: Geert Uytterhoeven <geert+renesas@...der.be>
Despite the name, R-Car V3U (R8A779A0) was the first member of the R-Car
Gen4 family. Generalize the support for R-Car V3U to other SoCs in the
R-Car Gen4 family by adding a family-specific compatible value, and by
replacing all references to "V3U" by "Gen4".
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Link: https://lore.kernel.org/all/61f6f34eb7bcc62ff604add98f1bcd2d2584187d.1674499048.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
drivers/net/can/rcar/rcar_canfd.c | 99 ++++++++++++++++---------------
1 file changed, 50 insertions(+), 49 deletions(-)
diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 6bf80cefc307..aa7fcd4a47d3 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -82,8 +82,8 @@
#define RCANFD_GERFL_DEF BIT(0)
#define RCANFD_GERFL_ERR(gpriv, x) \
- ((x) & (reg_v3u(gpriv, RCANFD_GERFL_EEF0_7, \
- RCANFD_GERFL_EEF(0) | RCANFD_GERFL_EEF(1)) | \
+ ((x) & (reg_gen4(gpriv, RCANFD_GERFL_EEF0_7, \
+ RCANFD_GERFL_EEF(0) | RCANFD_GERFL_EEF(1)) | \
RCANFD_GERFL_MES | \
((gpriv)->fdmode ? RCANFD_GERFL_CMPOF : 0)))
@@ -91,16 +91,16 @@
/* RSCFDnCFDGAFLCFG0 / RSCFDnGAFLCFG0 */
#define RCANFD_GAFLCFG_SETRNC(gpriv, n, x) \
- (((x) & reg_v3u(gpriv, 0x1ff, 0xff)) << \
- (reg_v3u(gpriv, 16, 24) - ((n) & 1) * reg_v3u(gpriv, 16, 8)))
+ (((x) & reg_gen4(gpriv, 0x1ff, 0xff)) << \
+ (reg_gen4(gpriv, 16, 24) - ((n) & 1) * reg_gen4(gpriv, 16, 8)))
#define RCANFD_GAFLCFG_GETRNC(gpriv, n, x) \
- (((x) >> (reg_v3u(gpriv, 16, 24) - ((n) & 1) * reg_v3u(gpriv, 16, 8))) & \
- reg_v3u(gpriv, 0x1ff, 0xff))
+ (((x) >> (reg_gen4(gpriv, 16, 24) - ((n) & 1) * reg_gen4(gpriv, 16, 8))) & \
+ reg_gen4(gpriv, 0x1ff, 0xff))
/* RSCFDnCFDGAFLECTR / RSCFDnGAFLECTR */
#define RCANFD_GAFLECTR_AFLDAE BIT(8)
-#define RCANFD_GAFLECTR_AFLPN(gpriv, x) ((x) & reg_v3u(gpriv, 0x7f, 0x1f))
+#define RCANFD_GAFLECTR_AFLPN(gpriv, x) ((x) & reg_gen4(gpriv, 0x7f, 0x1f))
/* RSCFDnCFDGAFLIDj / RSCFDnGAFLIDj */
#define RCANFD_GAFLID_GAFLLB BIT(29)
@@ -118,13 +118,13 @@
/* RSCFDnCFDCmNCFG - CAN FD only */
#define RCANFD_NCFG_NTSEG2(gpriv, x) \
- (((x) & reg_v3u(gpriv, 0x7f, 0x1f)) << reg_v3u(gpriv, 25, 24))
+ (((x) & reg_gen4(gpriv, 0x7f, 0x1f)) << reg_gen4(gpriv, 25, 24))
#define RCANFD_NCFG_NTSEG1(gpriv, x) \
- (((x) & reg_v3u(gpriv, 0xff, 0x7f)) << reg_v3u(gpriv, 17, 16))
+ (((x) & reg_gen4(gpriv, 0xff, 0x7f)) << reg_gen4(gpriv, 17, 16))
#define RCANFD_NCFG_NSJW(gpriv, x) \
- (((x) & reg_v3u(gpriv, 0x7f, 0x1f)) << reg_v3u(gpriv, 10, 11))
+ (((x) & reg_gen4(gpriv, 0x7f, 0x1f)) << reg_gen4(gpriv, 10, 11))
#define RCANFD_NCFG_NBRP(x) (((x) & 0x3ff) << 0)
@@ -189,16 +189,16 @@
#define RCANFD_DCFG_DSJW(x) (((x) & 0x7) << 24)
#define RCANFD_DCFG_DTSEG2(gpriv, x) \
- (((x) & reg_v3u(gpriv, 0x0f, 0x7)) << reg_v3u(gpriv, 16, 20))
+ (((x) & reg_gen4(gpriv, 0x0f, 0x7)) << reg_gen4(gpriv, 16, 20))
#define RCANFD_DCFG_DTSEG1(gpriv, x) \
- (((x) & reg_v3u(gpriv, 0x1f, 0xf)) << reg_v3u(gpriv, 8, 16))
+ (((x) & reg_gen4(gpriv, 0x1f, 0xf)) << reg_gen4(gpriv, 8, 16))
#define RCANFD_DCFG_DBRP(x) (((x) & 0xff) << 0)
/* RSCFDnCFDCmFDCFG */
-#define RCANFD_V3U_FDCFG_CLOE BIT(30)
-#define RCANFD_V3U_FDCFG_FDOE BIT(28)
+#define RCANFD_GEN4_FDCFG_CLOE BIT(30)
+#define RCANFD_GEN4_FDCFG_FDOE BIT(28)
#define RCANFD_FDCFG_TDCE BIT(9)
#define RCANFD_FDCFG_TDCOC BIT(8)
#define RCANFD_FDCFG_TDCO(x) (((x) & 0x7f) >> 16)
@@ -233,10 +233,10 @@
/* Common FIFO bits */
/* RSCFDnCFDCFCCk */
-#define RCANFD_CFCC_CFTML(gpriv, x) (((x) & 0xf) << reg_v3u(gpriv, 16, 20))
-#define RCANFD_CFCC_CFM(gpriv, x) (((x) & 0x3) << reg_v3u(gpriv, 8, 16))
+#define RCANFD_CFCC_CFTML(gpriv, x) (((x) & 0xf) << reg_gen4(gpriv, 16, 20))
+#define RCANFD_CFCC_CFM(gpriv, x) (((x) & 0x3) << reg_gen4(gpriv, 8, 16))
#define RCANFD_CFCC_CFIM BIT(12)
-#define RCANFD_CFCC_CFDC(gpriv, x) (((x) & 0x7) << reg_v3u(gpriv, 21, 8))
+#define RCANFD_CFCC_CFDC(gpriv, x) (((x) & 0x7) << reg_gen4(gpriv, 21, 8))
#define RCANFD_CFCC_CFPLS(x) (((x) & 0x7) << 4)
#define RCANFD_CFCC_CFTXIE BIT(2)
#define RCANFD_CFCC_CFE BIT(0)
@@ -304,7 +304,7 @@
#define RCANFD_RMND(y) (0x00a8 + (0x04 * (y)))
/* RSCFDnCFDRFCCx / RSCFDnRFCCx */
-#define RCANFD_RFCC(gpriv, x) (reg_v3u(gpriv, 0x00c0, 0x00b8) + (0x04 * (x)))
+#define RCANFD_RFCC(gpriv, x) (reg_gen4(gpriv, 0x00c0, 0x00b8) + (0x04 * (x)))
/* RSCFDnCFDRFSTSx / RSCFDnRFSTSx */
#define RCANFD_RFSTS(gpriv, x) (RCANFD_RFCC(gpriv, x) + 0x20)
/* RSCFDnCFDRFPCTRx / RSCFDnRFPCTRx */
@@ -314,13 +314,13 @@
/* RSCFDnCFDCFCCx / RSCFDnCFCCx */
#define RCANFD_CFCC(gpriv, ch, idx) \
- (reg_v3u(gpriv, 0x0120, 0x0118) + (0x0c * (ch)) + (0x04 * (idx)))
+ (reg_gen4(gpriv, 0x0120, 0x0118) + (0x0c * (ch)) + (0x04 * (idx)))
/* RSCFDnCFDCFSTSx / RSCFDnCFSTSx */
#define RCANFD_CFSTS(gpriv, ch, idx) \
- (reg_v3u(gpriv, 0x01e0, 0x0178) + (0x0c * (ch)) + (0x04 * (idx)))
+ (reg_gen4(gpriv, 0x01e0, 0x0178) + (0x0c * (ch)) + (0x04 * (idx)))
/* RSCFDnCFDCFPCTRx / RSCFDnCFPCTRx */
#define RCANFD_CFPCTR(gpriv, ch, idx) \
- (reg_v3u(gpriv, 0x0240, 0x01d8) + (0x0c * (ch)) + (0x04 * (idx)))
+ (reg_gen4(gpriv, 0x0240, 0x01d8) + (0x0c * (ch)) + (0x04 * (idx)))
/* RSCFDnCFDFESTS / RSCFDnFESTS */
#define RCANFD_FESTS (0x0238)
@@ -428,15 +428,15 @@
/* RSCFDnRPGACCr */
#define RCANFD_C_RPGACC(r) (0x1900 + (0x04 * (r)))
-/* R-Car V3U Classical and CAN FD mode specific register map */
-#define RCANFD_V3U_FDCFG(m) (0x1404 + (0x20 * (m)))
+/* R-Car Gen4 Classical and CAN FD mode specific register map */
+#define RCANFD_GEN4_FDCFG(m) (0x1404 + (0x20 * (m)))
-#define RCANFD_V3U_GAFL_OFFSET (0x1800)
+#define RCANFD_GEN4_GAFL_OFFSET (0x1800)
/* CAN FD mode specific register map */
/* RSCFDnCFDCmXXX -> RCANFD_F_XXX(m) */
-#define RCANFD_F_DCFG(gpriv, m) (reg_v3u(gpriv, 0x1400, 0x0500) + (0x20 * (m)))
+#define RCANFD_F_DCFG(gpriv, m) (reg_gen4(gpriv, 0x1400, 0x0500) + (0x20 * (m)))
#define RCANFD_F_CFDCFG(m) (0x0504 + (0x20 * (m)))
#define RCANFD_F_CFDCTR(m) (0x0508 + (0x20 * (m)))
#define RCANFD_F_CFDSTS(m) (0x050c + (0x20 * (m)))
@@ -452,7 +452,7 @@
#define RCANFD_F_RMDF(q, b) (0x200c + (0x04 * (b)) + (0x20 * (q)))
/* RSCFDnCFDRFXXx -> RCANFD_F_RFXX(x) */
-#define RCANFD_F_RFOFFSET(gpriv) reg_v3u(gpriv, 0x6000, 0x3000)
+#define RCANFD_F_RFOFFSET(gpriv) reg_gen4(gpriv, 0x6000, 0x3000)
#define RCANFD_F_RFID(gpriv, x) (RCANFD_F_RFOFFSET(gpriv) + (0x80 * (x)))
#define RCANFD_F_RFPTR(gpriv, x) (RCANFD_F_RFOFFSET(gpriv) + 0x04 + (0x80 * (x)))
#define RCANFD_F_RFFDSTS(gpriv, x) (RCANFD_F_RFOFFSET(gpriv) + 0x08 + (0x80 * (x)))
@@ -460,7 +460,7 @@
(RCANFD_F_RFOFFSET(gpriv) + 0x0c + (0x80 * (x)) + (0x04 * (df)))
/* RSCFDnCFDCFXXk -> RCANFD_F_CFXX(ch, k) */
-#define RCANFD_F_CFOFFSET(gpriv) reg_v3u(gpriv, 0x6400, 0x3400)
+#define RCANFD_F_CFOFFSET(gpriv) reg_gen4(gpriv, 0x6400, 0x3400)
#define RCANFD_F_CFID(gpriv, ch, idx) \
(RCANFD_F_CFOFFSET(gpriv) + (0x180 * (ch)) + (0x80 * (idx)))
@@ -596,28 +596,28 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
.shared_global_irqs = 1,
};
+static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
+ .max_channels = 8,
+ .postdiv = 2,
+ .shared_global_irqs = 1,
+};
+
static const struct rcar_canfd_hw_info rzg2l_hw_info = {
.max_channels = 2,
.postdiv = 1,
.multi_channel_irqs = 1,
};
-static const struct rcar_canfd_hw_info r8a779a0_hw_info = {
- .max_channels = 8,
- .postdiv = 2,
- .shared_global_irqs = 1,
-};
-
/* Helper functions */
-static inline bool is_v3u(struct rcar_canfd_global *gpriv)
+static inline bool is_gen4(struct rcar_canfd_global *gpriv)
{
- return gpriv->info == &r8a779a0_hw_info;
+ return gpriv->info == &rcar_gen4_hw_info;
}
-static inline u32 reg_v3u(struct rcar_canfd_global *gpriv,
- u32 v3u, u32 not_v3u)
+static inline u32 reg_gen4(struct rcar_canfd_global *gpriv,
+ u32 gen4, u32 not_gen4)
{
- return is_v3u(gpriv) ? v3u : not_v3u;
+ return is_gen4(gpriv) ? gen4 : not_gen4;
}
static inline void rcar_canfd_update(u32 mask, u32 val, u32 __iomem *reg)
@@ -687,13 +687,13 @@ static void rcar_canfd_tx_failure_cleanup(struct net_device *ndev)
static void rcar_canfd_set_mode(struct rcar_canfd_global *gpriv)
{
- if (is_v3u(gpriv)) {
- u32 ch, val = gpriv->fdmode ? RCANFD_V3U_FDCFG_FDOE
- : RCANFD_V3U_FDCFG_CLOE;
+ if (is_gen4(gpriv)) {
+ u32 ch, val = gpriv->fdmode ? RCANFD_GEN4_FDCFG_FDOE
+ : RCANFD_GEN4_FDCFG_CLOE;
for_each_set_bit(ch, &gpriv->channels_mask,
gpriv->info->max_channels)
- rcar_canfd_set_bit(gpriv->base, RCANFD_V3U_FDCFG(ch),
+ rcar_canfd_set_bit(gpriv->base, RCANFD_GEN4_FDCFG(ch),
val);
} else {
if (gpriv->fdmode)
@@ -814,8 +814,8 @@ static void rcar_canfd_configure_afl_rules(struct rcar_canfd_global *gpriv,
/* Write number of rules for channel */
rcar_canfd_set_bit(gpriv->base, RCANFD_GAFLCFG(ch),
RCANFD_GAFLCFG_SETRNC(gpriv, ch, num_rules));
- if (is_v3u(gpriv))
- offset = RCANFD_V3U_GAFL_OFFSET;
+ if (is_gen4(gpriv))
+ offset = RCANFD_GEN4_GAFL_OFFSET;
else if (gpriv->fdmode)
offset = RCANFD_F_GAFL_OFFSET;
else
@@ -1350,7 +1350,7 @@ static void rcar_canfd_set_bittiming(struct net_device *dev)
brp, sjw, tseg1, tseg2);
} else {
/* Classical CAN only mode */
- if (is_v3u(gpriv)) {
+ if (is_gen4(gpriv)) {
cfg = (RCANFD_NCFG_NTSEG1(gpriv, tseg1) |
RCANFD_NCFG_NBRP(brp) |
RCANFD_NCFG_NSJW(gpriv, sjw) |
@@ -1507,7 +1507,7 @@ static netdev_tx_t rcar_canfd_start_xmit(struct sk_buff *skb,
dlc = RCANFD_CFPTR_CFDLC(can_fd_len2dlc(cf->len));
- if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) || is_v3u(gpriv)) {
+ if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) || is_gen4(gpriv)) {
rcar_canfd_write(priv->base,
RCANFD_F_CFID(gpriv, ch, RCANFD_CFFIFO_IDX), id);
rcar_canfd_write(priv->base,
@@ -1566,7 +1566,7 @@ static void rcar_canfd_rx_pkt(struct rcar_canfd_channel *priv)
u32 ch = priv->channel;
u32 ridx = ch + RCANFD_RFFIFO_IDX;
- if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) || is_v3u(gpriv)) {
+ if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) || is_gen4(gpriv)) {
id = rcar_canfd_read(priv->base, RCANFD_F_RFID(gpriv, ridx));
dlc = rcar_canfd_read(priv->base, RCANFD_F_RFPTR(gpriv, ridx));
@@ -1617,7 +1617,7 @@ static void rcar_canfd_rx_pkt(struct rcar_canfd_channel *priv)
cf->len = can_cc_dlc2len(RCANFD_RFPTR_RFDLC(dlc));
if (id & RCANFD_RFID_RFRTR)
cf->can_id |= CAN_RTR_FLAG;
- else if (is_v3u(gpriv))
+ else if (is_gen4(gpriv))
rcar_canfd_get_data(priv, cf, RCANFD_F_RFDF(gpriv, ridx, 0));
else
rcar_canfd_get_data(priv, cf, RCANFD_C_RFDF(ridx, 0));
@@ -2096,9 +2096,10 @@ static SIMPLE_DEV_PM_OPS(rcar_canfd_pm_ops, rcar_canfd_suspend,
rcar_canfd_resume);
static const __maybe_unused struct of_device_id rcar_canfd_of_table[] = {
+ { .compatible = "renesas,r8a779a0-canfd", .data = &rcar_gen4_hw_info },
{ .compatible = "renesas,rcar-gen3-canfd", .data = &rcar_gen3_hw_info },
+ { .compatible = "renesas,rcar-gen4-canfd", .data = &rcar_gen4_hw_info },
{ .compatible = "renesas,rzg2l-canfd", .data = &rzg2l_hw_info },
- { .compatible = "renesas,r8a779a0-canfd", .data = &r8a779a0_hw_info },
{ }
};
--
2.39.1
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