@@ -19736,6 +19736,7 @@ R: kernel@pengutronix.de
L: linux-can@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/net/can/rockchip,rk3568v2-canfd.yaml
+F: drivers/net/can/rockchip/
ROCKCHIP CRYPTO DRIVERS
M: Corentin Labbe <clabbe@baylibre.com>
@@ -225,6 +225,7 @@ source "drivers/net/can/m_can/Kconfig"
source "drivers/net/can/mscan/Kconfig"
source "drivers/net/can/peak_canfd/Kconfig"
source "drivers/net/can/rcar/Kconfig"
+source "drivers/net/can/rockchip/Kconfig"
source "drivers/net/can/sja1000/Kconfig"
source "drivers/net/can/softing/Kconfig"
source "drivers/net/can/spi/Kconfig"
@@ -10,6 +10,7 @@ obj-$(CONFIG_CAN_SLCAN) += slcan/
obj-y += dev/
obj-y += esd/
obj-y += rcar/
+obj-y += rockchip/
obj-y += spi/
obj-y += usb/
obj-y += softing/
new file mode 100644
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config CAN_ROCKCHIP_CANFD
+ tristate "Rockchip CAN-FD controller"
+ depends on OF || COMPILE_TEST
+ select CAN_RX_OFFLOAD
+ help
+ Say Y here if you want to use CAN-FD controller found on
+ Rockchip SoCs.
new file mode 100644
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_CAN_ROCKCHIP_CANFD) += rockchip_canfd.o
+
+rockchip_canfd-objs :=
+rockchip_canfd-objs += rockchip_canfd-core.o
+rockchip_canfd-objs += rockchip_canfd-rx.o
+rockchip_canfd-objs += rockchip_canfd-timestamp.o
+rockchip_canfd-objs += rockchip_canfd-tx.o
new file mode 100644
@@ -0,0 +1,868 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2023, 2024 Pengutronix,
+// Marc Kleine-Budde <kernel@pengutronix.de>
+//
+// Based on:
+//
+// Rockchip CANFD driver
+//
+// Copyright (c) 2020 Rockchip Electronics Co. Ltd.
+//
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/string.h>
+
+#include "rockchip_canfd.h"
+
+static const struct rkcanfd_devtype_data rkcanfd_devtype_data_rk3568v2 = {
+ .model = RKCANFD_MODEL_RK3568V2,
+};
+
+static const char *__rkcanfd_get_model_str(enum rkcanfd_model model)
+{
+ switch (model) {
+ case RKCANFD_MODEL_RK3568V2:
+ return "rk3568v2";
+ }
+
+ return "<unknown>";
+}
+
+static inline const char *
+rkcanfd_get_model_str(const struct rkcanfd_priv *priv)
+{
+ return __rkcanfd_get_model_str(priv->devtype_data.model);
+}
+
+/* Note:
+ *
+ * The formula to calculate the CAN System Clock is:
+ *
+ * Tsclk = 2 x Tclk x (brp + 1)
+ *
+ * Double the data sheet's brp_min, brp_max and brp_inc values (both
+ * for the arbitration and data bit timing) to take the "2 x" into
+ * account.
+ */
+static const struct can_bittiming_const rkcanfd_bittiming_const = {
+ .name = DEVICE_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 256,
+ .tseg2_min = 1,
+ .tseg2_max = 128,
+ .sjw_max = 128,
+ .brp_min = 2, /* value from data sheet x2 */
+ .brp_max = 512, /* value from data sheet x2 */
+ .brp_inc = 2, /* value from data sheet x2 */
+};
+
+static const struct can_bittiming_const rkcanfd_data_bittiming_const = {
+ .name = DEVICE_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 32,
+ .tseg2_min = 1,
+ .tseg2_max = 16,
+ .sjw_max = 16,
+ .brp_min = 2, /* value from data sheet x2 */
+ .brp_max = 512, /* value from data sheet x2 */
+ .brp_inc = 2, /* value from data sheet x2 */
+};
+
+static void rkcanfd_chip_set_reset_mode(const struct rkcanfd_priv *priv)
+{
+ reset_control_assert(priv->reset);
+ udelay(2);
+ reset_control_deassert(priv->reset);
+
+ rkcanfd_write(priv, RKCANFD_REG_MODE, 0x0);
+}
+
+static void rkcanfd_chip_set_work_mode(const struct rkcanfd_priv *priv)
+{
+ rkcanfd_write(priv, RKCANFD_REG_MODE, priv->reg_mode_default);
+}
+
+static int rkcanfd_set_bittiming(struct rkcanfd_priv *priv)
+{
+ const struct can_bittiming *dbt = &priv->can.data_bittiming;
+ const struct can_bittiming *bt = &priv->can.bittiming;
+ u32 reg_nbt, reg_dbt, reg_tdc;
+ u32 tdco;
+
+ reg_nbt = FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_SJW,
+ bt->sjw - 1) |
+ FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_BRP,
+ (bt->brp / 2) - 1) |
+ FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_TSEG2,
+ bt->phase_seg2 - 1) |
+ FIELD_PREP(RKCANFD_REG_FD_NOMINAL_BITTIMING_TSEG1,
+ bt->prop_seg + bt->phase_seg1 - 1);
+
+ rkcanfd_write(priv, RKCANFD_REG_FD_NOMINAL_BITTIMING, reg_nbt);
+
+ if (!(priv->can.ctrlmode & CAN_CTRLMODE_FD))
+ return 0;
+
+ reg_dbt = FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_SJW,
+ dbt->sjw - 1) |
+ FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_BRP,
+ (dbt->brp / 2) - 1) |
+ FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_TSEG2,
+ dbt->phase_seg2 - 1) |
+ FIELD_PREP(RKCANFD_REG_FD_DATA_BITTIMING_TSEG1,
+ dbt->prop_seg + dbt->phase_seg1 - 1);
+
+ rkcanfd_write(priv, RKCANFD_REG_FD_DATA_BITTIMING, reg_dbt);
+
+ tdco = (priv->can.clock.freq / dbt->bitrate) * 2 / 3;
+ tdco = min(tdco, FIELD_MAX(RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET));
+
+ reg_tdc = FIELD_PREP(RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET, tdco) |
+ RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_ENABLE;
+ rkcanfd_write(priv, RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION,
+ reg_tdc);
+
+ return 0;
+}
+
+static void rkcanfd_get_berr_counter_raw(struct rkcanfd_priv *priv,
+ struct can_berr_counter *bec)
+{
+ bec->rxerr = rkcanfd_read(priv, RKCANFD_REG_RXERRORCNT);
+ bec->txerr = rkcanfd_read(priv, RKCANFD_REG_TXERRORCNT);
+}
+
+static int rkcanfd_get_berr_counter(const struct net_device *ndev,
+ struct can_berr_counter *bec)
+{
+ struct rkcanfd_priv *priv = netdev_priv(ndev);
+ int err;
+
+ err = pm_runtime_resume_and_get(ndev->dev.parent);
+ if (err)
+ return err;
+
+ rkcanfd_get_berr_counter_raw(priv, bec);
+
+ pm_runtime_put(ndev->dev.parent);
+
+ return 0;
+}
+
+static void rkcanfd_chip_interrupts_enable(const struct rkcanfd_priv *priv)
+{
+ rkcanfd_write(priv, RKCANFD_REG_INT_MASK, priv->reg_int_mask_default);
+
+ netdev_dbg(priv->ndev, "%s: reg_int_mask=0x%08x\n", __func__,
+ rkcanfd_read(priv, RKCANFD_REG_INT_MASK));
+}
+
+static void rkcanfd_chip_interrupts_disable(const struct rkcanfd_priv *priv)
+{
+ rkcanfd_write(priv, RKCANFD_REG_INT_MASK, RKCANFD_REG_INT_ALL);
+}
+
+static void rkcanfd_chip_fifo_setup(struct rkcanfd_priv *priv)
+{
+ u32 reg;
+
+ /* TXE FIFO */
+ reg = rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL);
+ reg |= RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_ENABLE;
+ rkcanfd_write(priv, RKCANFD_REG_RX_FIFO_CTRL, reg);
+
+ /* RX FIFO */
+ reg = rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL);
+ reg |= RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_ENABLE;
+ rkcanfd_write(priv, RKCANFD_REG_RX_FIFO_CTRL, reg);
+
+ WRITE_ONCE(priv->tx_head, 0);
+ WRITE_ONCE(priv->tx_tail, 0);
+ netdev_reset_queue(priv->ndev);
+}
+
+static void rkcanfd_chip_start(struct rkcanfd_priv *priv)
+{
+ u32 reg;
+
+ rkcanfd_chip_set_reset_mode(priv);
+
+ /* Receiving Filter: accept all */
+ rkcanfd_write(priv, RKCANFD_REG_IDCODE, 0x0);
+ rkcanfd_write(priv, RKCANFD_REG_IDMASK, RKCANFD_REG_IDCODE_EXTENDED_FRAME_ID);
+
+ /* enable:
+ * - CAN_FD: enable CAN-FD
+ * - AUTO_RETX_MODE: auto retransmission on TX error
+ * - COVER_MODE: RX-FIFO overwrite mode, do not send OVERLOAD frames
+ * - WORK_MODE: transition from reset to working mode
+ */
+ reg = rkcanfd_read(priv, RKCANFD_REG_MODE);
+ priv->reg_mode_default = reg |
+ RKCANFD_REG_MODE_CAN_FD_MODE_ENABLE |
+ RKCANFD_REG_MODE_AUTO_RETX_MODE |
+ RKCANFD_REG_MODE_COVER_MODE |
+ RKCANFD_REG_MODE_WORK_MODE;
+
+ /* mask, i.e. ignore:
+ * - TIMESTAMP_COUNTER_OVERFLOW_INT - timestamp counter overflow interrupt
+ * - TX_ARBIT_FAIL_INT - TX arbitration fail interrupt
+ * - OVERLOAD_INT - CAN bus overload interrupt
+ */
+ priv->reg_int_mask_default =
+ RKCANFD_REG_INT_TIMESTAMP_COUNTER_OVERFLOW_INT |
+ RKCANFD_REG_INT_TX_ARBIT_FAIL_INT |
+ RKCANFD_REG_INT_OVERLOAD_INT;
+
+ rkcanfd_chip_fifo_setup(priv);
+ rkcanfd_timestamp_init(priv);
+ rkcanfd_set_bittiming(priv);
+
+ rkcanfd_chip_interrupts_disable(priv);
+ rkcanfd_chip_set_work_mode(priv);
+
+ priv->can.state = CAN_STATE_ERROR_ACTIVE;
+
+ netdev_dbg(priv->ndev, "%s: reg_mode=0x%08x\n", __func__,
+ rkcanfd_read(priv, RKCANFD_REG_MODE));
+}
+
+static void __rkcanfd_chip_stop(struct rkcanfd_priv *priv, const enum can_state state)
+{
+ priv->can.state = state;
+
+ rkcanfd_chip_set_reset_mode(priv);
+ rkcanfd_chip_interrupts_disable(priv);
+}
+
+static void rkcanfd_chip_stop(struct rkcanfd_priv *priv, const enum can_state state)
+{
+ priv->can.state = state;
+
+ __rkcanfd_chip_stop(priv, state);
+}
+
+static void rkcanfd_chip_stop_sync(struct rkcanfd_priv *priv, const enum can_state state)
+{
+ priv->can.state = state;
+
+ __rkcanfd_chip_stop(priv, state);
+}
+
+static int rkcanfd_set_mode(struct net_device *ndev,
+ enum can_mode mode)
+{
+ struct rkcanfd_priv *priv = netdev_priv(ndev);
+
+ switch (mode) {
+ case CAN_MODE_START:
+ rkcanfd_chip_start(priv);
+ rkcanfd_chip_interrupts_enable(priv);
+ netif_wake_queue(ndev);
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static struct sk_buff *
+rkcanfd_alloc_can_err_skb(struct rkcanfd_priv *priv,
+ struct can_frame **cf, u32 *timestamp)
+{
+ struct sk_buff *skb;
+
+ *timestamp = rkcanfd_get_timestamp(priv);
+
+ skb = alloc_can_err_skb(priv->ndev, cf);
+
+ return skb;
+}
+
+static const char *rkcanfd_get_error_type_str(unsigned int type)
+{
+ switch (type) {
+ case RKCANFD_REG_ERROR_CODE_TYPE_BIT:
+ return "Bit";
+ case RKCANFD_REG_ERROR_CODE_TYPE_STUFF:
+ return "Stuff";
+ case RKCANFD_REG_ERROR_CODE_TYPE_FORM:
+ return "Form";
+ case RKCANFD_REG_ERROR_CODE_TYPE_ACK:
+ return "ACK";
+ case RKCANFD_REG_ERROR_CODE_TYPE_CRC:
+ return "CRC";
+ }
+
+ return "<unknown>";
+}
+
+#define RKCAN_ERROR_CODE(reg_ec, code) \
+ ((reg_ec) & RKCANFD_REG_ERROR_CODE_##code ? __stringify(code) " " : "")
+
+static void
+rkcanfd_handle_error_int_reg_ec(struct rkcanfd_priv *priv, struct can_frame *cf,
+ const u32 reg_ec)
+{
+ struct net_device_stats *stats = &priv->ndev->stats;
+ unsigned int type;
+ u32 reg_state, reg_cmd;
+
+ type = FIELD_GET(RKCANFD_REG_ERROR_CODE_TYPE, reg_ec);
+ reg_cmd = rkcanfd_read(priv, RKCANFD_REG_CMD);
+ reg_state = rkcanfd_read(priv, RKCANFD_REG_STATE);
+
+ netdev_dbg(priv->ndev, "%s Error in %s %s Phase: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s(0x%08x) CMD=%u RX=%u TX=%u Error-Warning=%u Bus-Off=%u\n",
+ rkcanfd_get_error_type_str(type),
+ reg_ec & RKCANFD_REG_ERROR_CODE_DIRECTION_RX ? "RX" : "TX",
+ reg_ec & RKCANFD_REG_ERROR_CODE_PHASE ? "Data" : "Arbitration",
+ RKCAN_ERROR_CODE(reg_ec, TX_OVERLOAD),
+ RKCAN_ERROR_CODE(reg_ec, TX_ERROR),
+ RKCAN_ERROR_CODE(reg_ec, TX_ACK),
+ RKCAN_ERROR_CODE(reg_ec, TX_ACK_EOF),
+ RKCAN_ERROR_CODE(reg_ec, TX_CRC),
+ RKCAN_ERROR_CODE(reg_ec, TX_STUFF_COUNT),
+ RKCAN_ERROR_CODE(reg_ec, TX_DATA),
+ RKCAN_ERROR_CODE(reg_ec, TX_SOF_DLC),
+ RKCAN_ERROR_CODE(reg_ec, TX_IDLE),
+ RKCAN_ERROR_CODE(reg_ec, RX_BUF_INT),
+ RKCAN_ERROR_CODE(reg_ec, RX_SPACE),
+ RKCAN_ERROR_CODE(reg_ec, RX_EOF),
+ RKCAN_ERROR_CODE(reg_ec, RX_ACK_LIM),
+ RKCAN_ERROR_CODE(reg_ec, RX_ACK),
+ RKCAN_ERROR_CODE(reg_ec, RX_CRC_LIM),
+ RKCAN_ERROR_CODE(reg_ec, RX_CRC),
+ RKCAN_ERROR_CODE(reg_ec, RX_STUFF_COUNT),
+ RKCAN_ERROR_CODE(reg_ec, RX_DATA),
+ RKCAN_ERROR_CODE(reg_ec, RX_DLC),
+ RKCAN_ERROR_CODE(reg_ec, RX_BRS_ESI),
+ RKCAN_ERROR_CODE(reg_ec, RX_RES),
+ RKCAN_ERROR_CODE(reg_ec, RX_FDF),
+ RKCAN_ERROR_CODE(reg_ec, RX_ID2_RTR),
+ RKCAN_ERROR_CODE(reg_ec, RX_SOF_IDE),
+ RKCAN_ERROR_CODE(reg_ec, RX_IDLE),
+ reg_ec, reg_cmd,
+ !!(reg_state & RKCANFD_REG_STATE_RX_PERIOD),
+ !!(reg_state & RKCANFD_REG_STATE_TX_PERIOD),
+ !!(reg_state & RKCANFD_REG_STATE_ERROR_WARNING_STATE),
+ !!(reg_state & RKCANFD_REG_STATE_BUS_OFF_STATE));
+
+ priv->can.can_stats.bus_error++;
+
+ if (reg_ec & RKCANFD_REG_ERROR_CODE_DIRECTION_RX)
+ stats->rx_errors++;
+ else
+ stats->tx_errors++;
+
+ if (!cf)
+ return;
+
+ if (reg_ec & RKCANFD_REG_ERROR_CODE_DIRECTION_RX) {
+ if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_SOF_IDE)
+ cf->data[3] = CAN_ERR_PROT_LOC_SOF;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_ID2_RTR)
+ cf->data[3] = CAN_ERR_PROT_LOC_RTR;
+ /* RKCANFD_REG_ERROR_CODE_RX_FDF */
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_RES)
+ cf->data[3] = CAN_ERR_PROT_LOC_RES0;
+ /* RKCANFD_REG_ERROR_CODE_RX_BRS_ESI */
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_DLC)
+ cf->data[3] = CAN_ERR_PROT_LOC_DLC;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_DATA)
+ cf->data[3] = CAN_ERR_PROT_LOC_DATA;
+ /* RKCANFD_REG_ERROR_CODE_RX_STUFF_COUNT */
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_CRC)
+ cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_CRC_LIM)
+ cf->data[3] = CAN_ERR_PROT_LOC_ACK_DEL;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_ACK)
+ cf->data[3] = CAN_ERR_PROT_LOC_ACK;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_ACK_LIM)
+ cf->data[3] = CAN_ERR_PROT_LOC_ACK_DEL;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_EOF)
+ cf->data[3] = CAN_ERR_PROT_LOC_EOF;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_SPACE)
+ cf->data[3] = CAN_ERR_PROT_LOC_EOF;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_RX_BUF_INT)
+ cf->data[3] = CAN_ERR_PROT_LOC_INTERM;
+ } else {
+ cf->data[2] |= CAN_ERR_PROT_TX;
+
+ if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_SOF_DLC)
+ cf->data[3] = CAN_ERR_PROT_LOC_SOF;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_DATA)
+ cf->data[3] = CAN_ERR_PROT_LOC_DATA;
+ /* RKCANFD_REG_ERROR_CODE_TX_STUFF_COUNT */
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_CRC)
+ cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_ACK_EOF)
+ cf->data[3] = CAN_ERR_PROT_LOC_ACK;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_ACK)
+ cf->data[3] = CAN_ERR_PROT_LOC_ACK;
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_ACK_EOF)
+ cf->data[3] = CAN_ERR_PROT_LOC_ACK_DEL;
+ /* RKCANFD_REG_ERROR_CODE_TX_ERROR */
+ else if (reg_ec & RKCANFD_REG_ERROR_CODE_TX_OVERLOAD)
+ cf->data[2] |= CAN_ERR_PROT_OVERLOAD;
+ }
+
+ switch (reg_ec & RKCANFD_REG_ERROR_CODE_TYPE) {
+ case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE,
+ RKCANFD_REG_ERROR_CODE_TYPE_BIT):
+
+ cf->data[2] |= CAN_ERR_PROT_BIT;
+ break;
+ case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE,
+ RKCANFD_REG_ERROR_CODE_TYPE_STUFF):
+ cf->data[2] |= CAN_ERR_PROT_STUFF;
+ break;
+ case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE,
+ RKCANFD_REG_ERROR_CODE_TYPE_FORM):
+ cf->data[2] |= CAN_ERR_PROT_FORM;
+ break;
+ case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE,
+ RKCANFD_REG_ERROR_CODE_TYPE_ACK):
+ cf->can_id |= CAN_ERR_ACK;
+ break;
+ case FIELD_PREP_CONST(RKCANFD_REG_ERROR_CODE_TYPE,
+ RKCANFD_REG_ERROR_CODE_TYPE_CRC):
+ cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
+ break;
+ }
+}
+
+static int rkcanfd_handle_error_int(struct rkcanfd_priv *priv)
+{
+ struct net_device_stats *stats = &priv->ndev->stats;
+ struct can_frame *cf = NULL;
+ u32 reg_ec, timestamp;
+ struct sk_buff *skb;
+ int err;
+
+ reg_ec = rkcanfd_read(priv, RKCANFD_REG_ERROR_CODE);
+
+ if (!reg_ec)
+ return 0;
+
+ skb = rkcanfd_alloc_can_err_skb(priv, &cf, ×tamp);
+ if (cf) {
+ struct can_berr_counter bec;
+
+ rkcanfd_get_berr_counter_raw(priv, &bec);
+ cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR | CAN_ERR_CNT;
+ cf->data[6] = bec.txerr;
+ cf->data[7] = bec.rxerr;
+ }
+
+ rkcanfd_handle_error_int_reg_ec(priv, cf, reg_ec);
+
+ if (!cf)
+ return 0;
+
+ err = can_rx_offload_queue_timestamp(&priv->offload, skb, timestamp);
+ if (err)
+ stats->rx_fifo_errors++;
+
+ return 0;
+}
+
+static int rkcanfd_handle_state_error_int(struct rkcanfd_priv *priv)
+{
+ struct net_device_stats *stats = &priv->ndev->stats;
+ enum can_state new_state, rx_state, tx_state;
+ struct net_device *ndev = priv->ndev;
+ struct can_berr_counter bec;
+ struct can_frame *cf = NULL;
+ struct sk_buff *skb;
+ u32 timestamp;
+ int err;
+
+ rkcanfd_get_berr_counter_raw(priv, &bec);
+ can_state_get_by_berr_counter(ndev, &bec, &tx_state, &rx_state);
+
+ new_state = max(tx_state, rx_state);
+ if (new_state == priv->can.state)
+ return 0;
+
+ /* The skb allocation might fail, but can_change_state()
+ * handles cf == NULL.
+ */
+ skb = rkcanfd_alloc_can_err_skb(priv, &cf, ×tamp);
+ can_change_state(ndev, cf, tx_state, rx_state);
+
+ if (new_state == CAN_STATE_BUS_OFF) {
+ rkcanfd_chip_stop(priv, CAN_STATE_BUS_OFF);
+ can_bus_off(ndev);
+ }
+
+ if (!skb)
+ return 0;
+
+ if (new_state != CAN_STATE_BUS_OFF) {
+ cf->can_id |= CAN_ERR_CNT;
+ cf->data[6] = bec.txerr;
+ cf->data[7] = bec.rxerr;
+ }
+
+ err = can_rx_offload_queue_timestamp(&priv->offload, skb, timestamp);
+ if (err)
+ stats->rx_fifo_errors++;
+
+ return 0;
+}
+
+static int
+rkcanfd_handle_rx_fifo_overflow_int(struct rkcanfd_priv *priv)
+{
+ struct net_device_stats *stats = &priv->ndev->stats;
+ struct can_berr_counter bec;
+ struct can_frame *cf = NULL;
+ struct sk_buff *skb;
+ u32 timestamp;
+ int err;
+
+ stats->rx_over_errors++;
+ stats->rx_errors++;
+
+ netdev_dbg(priv->ndev, "RX-FIFO overflow\n");
+
+ skb = rkcanfd_alloc_can_err_skb(priv, &cf, ×tamp);
+ if (skb)
+ return 0;
+
+ rkcanfd_get_berr_counter_raw(priv, &bec);
+
+ cf->can_id |= CAN_ERR_CRTL | CAN_ERR_CNT;
+ cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
+ cf->data[6] = bec.txerr;
+ cf->data[7] = bec.rxerr;
+
+ err = can_rx_offload_queue_timestamp(&priv->offload, skb, timestamp);
+ if (err)
+ stats->rx_fifo_errors++;
+
+ return 0;
+}
+
+#define rkcanfd_handle(priv, irq, ...) \
+({ \
+ struct rkcanfd_priv *_priv = (priv); \
+ int err; \
+\
+ err = rkcanfd_handle_##irq(_priv, ## __VA_ARGS__); \
+ if (err) \
+ netdev_err(_priv->ndev, \
+ "IRQ handler rkcanfd_handle_%s() returned error: %pe\n", \
+ __stringify(irq), ERR_PTR(err)); \
+ err; \
+})
+
+static irqreturn_t rkcanfd_irq(int irq, void *dev_id)
+{
+ struct rkcanfd_priv *priv = dev_id;
+ u32 reg_int_unmasked, reg_int;
+
+ reg_int_unmasked = rkcanfd_read(priv, RKCANFD_REG_INT);
+ reg_int = reg_int_unmasked & ~priv->reg_int_mask_default;
+
+ if (!reg_int)
+ return IRQ_NONE;
+
+ /* First ACK then handle, to avoid lost-IRQ race condition on
+ * fast re-occurring interrupts.
+ */
+ rkcanfd_write(priv, RKCANFD_REG_INT, reg_int);
+
+ if (reg_int & RKCANFD_REG_INT_RX_FINISH_INT)
+ rkcanfd_handle(priv, rx_int);
+
+ if (reg_int & RKCANFD_REG_INT_ERROR_INT)
+ rkcanfd_handle(priv, error_int);
+
+ if (reg_int & (RKCANFD_REG_INT_BUS_OFF_INT |
+ RKCANFD_REG_INT_PASSIVE_ERROR_INT |
+ RKCANFD_REG_INT_ERROR_WARNING_INT) ||
+ priv->can.state > CAN_STATE_ERROR_ACTIVE)
+ rkcanfd_handle(priv, state_error_int);
+
+ if (reg_int & RKCANFD_REG_INT_RX_FIFO_OVERFLOW_INT)
+ rkcanfd_handle(priv, rx_fifo_overflow_int);
+
+ if (reg_int & ~(RKCANFD_REG_INT_ALL_ERROR |
+ RKCANFD_REG_INT_RX_FIFO_OVERFLOW_INT |
+ RKCANFD_REG_INT_RX_FINISH_INT))
+ netdev_err(priv->ndev, "%s: int=0x%08x\n", __func__, reg_int);
+
+ if (reg_int & RKCANFD_REG_INT_WAKEUP_INT)
+ netdev_info(priv->ndev, "%s: WAKEUP_INT\n", __func__);
+
+ if (reg_int & RKCANFD_REG_INT_TXE_FIFO_FULL_INT)
+ netdev_info(priv->ndev, "%s: TXE_FIFO_FULL_INT\n", __func__);
+
+ if (reg_int & RKCANFD_REG_INT_TXE_FIFO_OV_INT)
+ netdev_info(priv->ndev, "%s: TXE_FIFO_OV_INT\n", __func__);
+
+ if (reg_int & RKCANFD_REG_INT_BUS_OFF_RECOVERY_INT)
+ netdev_info(priv->ndev, "%s: BUS_OFF_RECOVERY_INT\n", __func__);
+
+ if (reg_int & RKCANFD_REG_INT_RX_FIFO_FULL_INT)
+ netdev_info(priv->ndev, "%s: RX_FIFO_FULL_INT\n", __func__);
+
+ if (reg_int & RKCANFD_REG_INT_OVERLOAD_INT)
+ netdev_info(priv->ndev, "%s: OVERLOAD_INT\n", __func__);
+
+ can_rx_offload_irq_finish(&priv->offload);
+
+ return IRQ_HANDLED;
+}
+
+static int rkcanfd_open(struct net_device *ndev)
+{
+ struct rkcanfd_priv *priv = netdev_priv(ndev);
+ int err;
+
+ err = open_candev(ndev);
+ if (err)
+ return err;
+
+ err = pm_runtime_resume_and_get(ndev->dev.parent);
+ if (err)
+ goto out_close_candev;
+
+ rkcanfd_chip_start(priv);
+ can_rx_offload_enable(&priv->offload);
+
+ err = request_irq(ndev->irq, rkcanfd_irq, IRQF_SHARED, ndev->name, priv);
+ if (err)
+ goto out_rkcanfd_chip_stop;
+
+ rkcanfd_chip_interrupts_enable(priv);
+
+ netif_start_queue(ndev);
+
+ return 0;
+
+out_rkcanfd_chip_stop:
+ rkcanfd_chip_stop_sync(priv, CAN_STATE_STOPPED);
+ pm_runtime_put(ndev->dev.parent);
+out_close_candev:
+ close_candev(ndev);
+ return err;
+}
+
+static int rkcanfd_stop(struct net_device *ndev)
+{
+ struct rkcanfd_priv *priv = netdev_priv(ndev);
+
+ netif_stop_queue(ndev);
+
+ rkcanfd_chip_interrupts_disable(priv);
+ free_irq(ndev->irq, priv);
+ can_rx_offload_disable(&priv->offload);
+ rkcanfd_chip_stop_sync(priv, CAN_STATE_STOPPED);
+ close_candev(ndev);
+
+ pm_runtime_put(ndev->dev.parent);
+
+ return 0;
+}
+
+static const struct net_device_ops rkcanfd_netdev_ops = {
+ .ndo_open = rkcanfd_open,
+ .ndo_stop = rkcanfd_stop,
+ .ndo_start_xmit = rkcanfd_start_xmit,
+ .ndo_change_mtu = can_change_mtu,
+};
+
+static int __maybe_unused rkcanfd_runtime_suspend(struct device *dev)
+{
+ struct rkcanfd_priv *priv = dev_get_drvdata(dev);
+
+ clk_bulk_disable_unprepare(priv->clks_num, priv->clks);
+
+ return 0;
+}
+
+static int __maybe_unused rkcanfd_runtime_resume(struct device *dev)
+{
+ struct rkcanfd_priv *priv = dev_get_drvdata(dev);
+
+ return clk_bulk_prepare_enable(priv->clks_num, priv->clks);
+}
+
+static void rkcanfd_register_done(const struct rkcanfd_priv *priv)
+{
+ u32 dev_id;
+
+ dev_id = rkcanfd_read(priv, RKCANFD_REG_RTL_VERSION);
+
+ netdev_info(priv->ndev,
+ "Rockchip-CANFD %s rev%lu.%lu found\n",
+ rkcanfd_get_model_str(priv),
+ FIELD_GET(RKCANFD_REG_RTL_VERSION_MAJOR, dev_id),
+ FIELD_GET(RKCANFD_REG_RTL_VERSION_MINOR, dev_id));
+}
+
+static int rkcanfd_register(struct rkcanfd_priv *priv)
+{
+ struct net_device *ndev = priv->ndev;
+ int err;
+
+ pm_runtime_enable(ndev->dev.parent);
+
+ err = pm_runtime_resume_and_get(ndev->dev.parent);
+ if (err)
+ goto out_pm_runtime_disable;
+
+ err = register_candev(ndev);
+ if (err)
+ goto out_pm_runtime_put_sync;
+
+ rkcanfd_register_done(priv);
+
+ pm_runtime_put(ndev->dev.parent);
+
+ return 0;
+
+out_pm_runtime_put_sync:
+ pm_runtime_put_sync(ndev->dev.parent);
+out_pm_runtime_disable:
+ pm_runtime_disable(ndev->dev.parent);
+
+ return err;
+}
+
+static inline void rkcanfd_unregister(struct rkcanfd_priv *priv)
+{
+ struct net_device *ndev = priv->ndev;
+
+ unregister_candev(ndev);
+ pm_runtime_disable(ndev->dev.parent);
+}
+
+static const struct of_device_id rkcanfd_of_match[] = {
+ {
+ .compatible = "rockchip,rk3568v2-canfd",
+ .data = &rkcanfd_devtype_data_rk3568v2,
+ }, {
+ /* sentinel */
+ },
+};
+MODULE_DEVICE_TABLE(of, rkcanfd_of_match);
+
+static int rkcanfd_probe(struct platform_device *pdev)
+{
+ struct rkcanfd_priv *priv;
+ struct net_device *ndev;
+ const void *match;
+ int err;
+
+ ndev = alloc_candev(sizeof(struct rkcanfd_priv), RKCANFD_TXFIFO_DEPTH);
+ if (!ndev)
+ return -ENOMEM;
+
+ priv = netdev_priv(ndev);
+
+ ndev->irq = platform_get_irq(pdev, 0);
+ if (ndev->irq < 0) {
+ err = ndev->irq;
+ goto out_free_candev;
+ }
+
+ priv->clks_num = devm_clk_bulk_get_all(&pdev->dev, &priv->clks);
+ if (priv->clks_num < 0) {
+ err = priv->clks_num;
+ goto out_free_candev;
+ }
+
+ priv->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->regs)) {
+ err = PTR_ERR(priv->regs);
+ goto out_free_candev;
+ }
+
+ priv->reset = devm_reset_control_array_get_exclusive(&pdev->dev);
+ if (IS_ERR(priv->reset)) {
+ err = dev_err_probe(&pdev->dev, PTR_ERR(priv->reset),
+ "Failed to get reset line\n");
+ goto out_free_candev;
+ }
+
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+
+ ndev->netdev_ops = &rkcanfd_netdev_ops;
+ ndev->flags |= IFF_ECHO;
+
+ platform_set_drvdata(pdev, priv);
+ priv->can.clock.freq = clk_get_rate(priv->clks[0].clk);
+ priv->can.bittiming_const = &rkcanfd_bittiming_const;
+ priv->can.data_bittiming_const = &rkcanfd_data_bittiming_const;
+ priv->can.ctrlmode_supported = 0;
+ priv->can.do_set_mode = rkcanfd_set_mode;
+ priv->can.do_get_berr_counter = rkcanfd_get_berr_counter;
+ priv->ndev = ndev;
+
+ match = device_get_match_data(&pdev->dev);
+ if (match)
+ priv->devtype_data = *(struct rkcanfd_devtype_data *)match;
+
+ err = can_rx_offload_add_manual(ndev, &priv->offload,
+ RKCANFD_NAPI_WEIGHT);
+ if (err)
+ goto out_free_candev;
+
+ err = rkcanfd_register(priv);
+ if (err)
+ goto out_can_rx_offload_del;
+
+ return 0;
+
+out_can_rx_offload_del:
+ can_rx_offload_del(&priv->offload);
+out_free_candev:
+ free_candev(ndev);
+
+ return err;
+}
+
+static void rkcanfd_remove(struct platform_device *pdev)
+{
+ struct rkcanfd_priv *priv = platform_get_drvdata(pdev);
+ struct net_device *ndev = priv->ndev;
+
+ can_rx_offload_del(&priv->offload);
+ rkcanfd_unregister(priv);
+ free_candev(ndev);
+}
+
+static const struct dev_pm_ops rkcanfd_pm_ops = {
+ SET_RUNTIME_PM_OPS(rkcanfd_runtime_suspend,
+ rkcanfd_runtime_resume, NULL)
+};
+
+static struct platform_driver rkcanfd_driver = {
+ .driver = {
+ .name = DEVICE_NAME,
+ .pm = &rkcanfd_pm_ops,
+ .of_match_table = rkcanfd_of_match,
+ },
+ .probe = rkcanfd_probe,
+ .remove = rkcanfd_remove,
+};
+module_platform_driver(rkcanfd_driver);
+
+MODULE_AUTHOR("Marc Kleine-Budde <mkl@pengutronix.de>");
+MODULE_DESCRIPTION("Rockchip CAN-FD Driver");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2023, 2024 Pengutronix,
+// Marc Kleine-Budde <kernel@pengutronix.de>
+//
+
+#include "rockchip_canfd.h"
+
+static unsigned int
+rkcanfd_fifo_header_to_cfd_header(const struct rkcanfd_priv *priv,
+ const struct rkcanfd_fifo_header *header,
+ struct canfd_frame *cfd)
+{
+ unsigned int len = sizeof(*cfd) - sizeof(cfd->data);
+ u8 dlc;
+
+ if (header->frameinfo & RKCANFD_REG_FD_FRAMEINFO_FRAME_FORMAT)
+ cfd->can_id = FIELD_GET(RKCANFD_REG_FD_ID_EFF, header->id) |
+ CAN_EFF_FLAG;
+ else
+ cfd->can_id = FIELD_GET(RKCANFD_REG_FD_ID_SFF, header->id);
+
+ dlc = FIELD_GET(RKCANFD_REG_FD_FRAMEINFO_DATA_LENGTH,
+ header->frameinfo);
+
+ /* CAN-FD */
+ if (header->frameinfo & RKCANFD_REG_FD_FRAMEINFO_FDF) {
+ cfd->len = can_fd_dlc2len(dlc);
+
+ /* The cfd is not allocated by alloc_canfd_skb(), so
+ * set CANFD_FDF here.
+ */
+ cfd->flags |= CANFD_FDF;
+
+ if (header->frameinfo & RKCANFD_REG_FD_FRAMEINFO_BRS)
+ cfd->flags |= CANFD_BRS;
+ } else {
+ cfd->len = can_cc_dlc2len(dlc);
+
+ if (header->frameinfo & RKCANFD_REG_FD_FRAMEINFO_RTR) {
+ cfd->can_id |= CAN_RTR_FLAG;
+
+ return len;
+ }
+ }
+
+ return len + cfd->len;
+}
+
+static int rkcanfd_handle_rx_int_one(struct rkcanfd_priv *priv)
+{
+ struct net_device_stats *stats = &priv->ndev->stats;
+ struct canfd_frame cfd[1] = { }, *skb_cfd;
+ struct rkcanfd_fifo_header header[1] = { };
+ struct sk_buff *skb;
+ unsigned int len;
+ int err;
+
+ /* read header into separate struct and convert it later */
+ rkcanfd_read_rep(priv, RKCANFD_REG_RX_FIFO_RDATA,
+ header, sizeof(*header));
+ /* read data directly into cfd */
+ rkcanfd_read_rep(priv, RKCANFD_REG_RX_FIFO_RDATA,
+ cfd->data, sizeof(cfd->data));
+
+ len = rkcanfd_fifo_header_to_cfd_header(priv, header, cfd);
+
+ /* Drop any received CAN-FD frames if CAN-FD mode is not
+ * requested.
+ */
+ if (header->frameinfo & RKCANFD_REG_FD_FRAMEINFO_FDF &&
+ !(priv->can.ctrlmode & CAN_CTRLMODE_FD)) {
+ stats->rx_dropped++;
+
+ return 0;
+ }
+
+ if (header->frameinfo & RKCANFD_REG_FD_FRAMEINFO_FDF)
+ skb = alloc_canfd_skb(priv->ndev, &skb_cfd);
+ else
+ skb = alloc_can_skb(priv->ndev, (struct can_frame **)&skb_cfd);
+
+ if (!skb) {
+ stats->rx_dropped++;
+
+ return 0;
+ }
+
+ memcpy(skb_cfd, cfd, len);
+
+ err = can_rx_offload_queue_timestamp(&priv->offload, skb, header->ts);
+ if (err)
+ stats->rx_fifo_errors++;
+
+ return 0;
+}
+
+static inline unsigned int
+rkcanfd_rx_fifo_get_len(const struct rkcanfd_priv *priv)
+{
+ const u32 reg = rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL);
+
+ return FIELD_GET(RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT, reg);
+}
+
+int rkcanfd_handle_rx_int(struct rkcanfd_priv *priv)
+{
+ unsigned int len;
+ int err;
+
+ while ((len = rkcanfd_rx_fifo_get_len(priv))) {
+ err = rkcanfd_handle_rx_int_one(priv);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2023, 2024 Pengutronix,
+// Marc Kleine-Budde <kernel@pengutronix.de>
+//
+
+#include "rockchip_canfd.h"
+
+void rkcanfd_timestamp_init(struct rkcanfd_priv *priv)
+{
+ u32 reg;
+
+ reg = RKCANFD_REG_TIMESTAMP_CTRL_TIME_BASE_COUNTER_ENABLE;
+ rkcanfd_write(priv, RKCANFD_REG_TIMESTAMP_CTRL, reg);
+}
new file mode 100644
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2023, 2024 Pengutronix,
+// Marc Kleine-Budde <kernel@pengutronix.de>
+//
+
+#include "rockchip_canfd.h"
+
+int rkcanfd_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ return NETDEV_TX_OK;
+}
new file mode 100644
@@ -0,0 +1,361 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (c) 2023, 2024 Pengutronix,
+ * Marc Kleine-Budde <kernel@pengutronix.de>
+ */
+
+#ifndef _ROCKCHIP_CANFD_H
+#define _ROCKCHIP_CANFD_H
+
+#include <linux/bitfield.h>
+#include <linux/can/dev.h>
+#include <linux/can/rx-offload.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/netdevice.h>
+#include <linux/reset.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <linux/u64_stats_sync.h>
+#include <linux/units.h>
+
+#define RKCANFD_REG_MODE 0x000
+#define RKCANFD_REG_MODE_CAN_FD_MODE_ENABLE BIT(15)
+#define RKCANFD_REG_MODE_DPEE BIT(14)
+#define RKCANFD_REG_MODE_BRSD BIT(13)
+#define RKCANFD_REG_MODE_SPACE_RX_MODE BIT(12)
+#define RKCANFD_REG_MODE_AUTO_BUS_ON BIT(11)
+#define RKCANFD_REG_MODE_AUTO_RETX_MODE BIT(10)
+#define RKCANFD_REG_MODE_OVLD_MODE BIT(9)
+#define RKCANFD_REG_MODE_COVER_MODE BIT(8)
+#define RKCANFD_REG_MODE_RXSORT_MODE BIT(7)
+#define RKCANFD_REG_MODE_TXORDER_MODE BIT(6)
+#define RKCANFD_REG_MODE_RXSTX_MODE BIT(5)
+#define RKCANFD_REG_MODE_LBACK_MODE BIT(4)
+#define RKCANFD_REG_MODE_SILENT_MODE BIT(3)
+#define RKCANFD_REG_MODE_SELF_TEST BIT(2)
+#define RKCANFD_REG_MODE_SLEEP_MODE BIT(1)
+#define RKCANFD_REG_MODE_WORK_MODE BIT(0)
+
+#define RKCANFD_REG_CMD 0x004
+#define RKCANFD_REG_CMD_TX1_REQ BIT(1)
+#define RKCANFD_REG_CMD_TX0_REQ BIT(0)
+#define RKCANFD_REG_CMD_TX_REQ(i) (RKCANFD_REG_CMD_TX0_REQ << (i))
+
+#define RKCANFD_REG_STATE 0x008
+#define RKCANFD_REG_STATE_SLEEP_STATE BIT(6)
+#define RKCANFD_REG_STATE_BUS_OFF_STATE BIT(5)
+#define RKCANFD_REG_STATE_ERROR_WARNING_STATE BIT(4)
+#define RKCANFD_REG_STATE_TX_PERIOD BIT(3)
+#define RKCANFD_REG_STATE_RX_PERIOD BIT(2)
+#define RKCANFD_REG_STATE_TX_BUFFER_FULL BIT(1)
+#define RKCANFD_REG_STATE_RX_BUFFER_FULL BIT(0)
+
+#define RKCANFD_REG_INT 0x00c
+#define RKCANFD_REG_INT_WAKEUP_INT BIT(14)
+#define RKCANFD_REG_INT_TXE_FIFO_FULL_INT BIT(13)
+#define RKCANFD_REG_INT_TXE_FIFO_OV_INT BIT(12)
+#define RKCANFD_REG_INT_TIMESTAMP_COUNTER_OVERFLOW_INT BIT(11)
+#define RKCANFD_REG_INT_BUS_OFF_RECOVERY_INT BIT(10)
+#define RKCANFD_REG_INT_BUS_OFF_INT BIT(9)
+#define RKCANFD_REG_INT_RX_FIFO_OVERFLOW_INT BIT(8)
+#define RKCANFD_REG_INT_RX_FIFO_FULL_INT BIT(7)
+#define RKCANFD_REG_INT_ERROR_INT BIT(6)
+#define RKCANFD_REG_INT_TX_ARBIT_FAIL_INT BIT(5)
+#define RKCANFD_REG_INT_PASSIVE_ERROR_INT BIT(4)
+#define RKCANFD_REG_INT_OVERLOAD_INT BIT(3)
+#define RKCANFD_REG_INT_ERROR_WARNING_INT BIT(2)
+#define RKCANFD_REG_INT_TX_FINISH_INT BIT(1)
+#define RKCANFD_REG_INT_RX_FINISH_INT BIT(0)
+
+#define RKCANFD_REG_INT_ALL \
+ (RKCANFD_REG_INT_WAKEUP_INT | \
+ RKCANFD_REG_INT_TXE_FIFO_FULL_INT | \
+ RKCANFD_REG_INT_TXE_FIFO_OV_INT | \
+ RKCANFD_REG_INT_TIMESTAMP_COUNTER_OVERFLOW_INT | \
+ RKCANFD_REG_INT_BUS_OFF_RECOVERY_INT | \
+ RKCANFD_REG_INT_BUS_OFF_INT | \
+ RKCANFD_REG_INT_RX_FIFO_OVERFLOW_INT | \
+ RKCANFD_REG_INT_RX_FIFO_FULL_INT | \
+ RKCANFD_REG_INT_ERROR_INT | \
+ RKCANFD_REG_INT_TX_ARBIT_FAIL_INT | \
+ RKCANFD_REG_INT_PASSIVE_ERROR_INT | \
+ RKCANFD_REG_INT_OVERLOAD_INT | \
+ RKCANFD_REG_INT_ERROR_WARNING_INT | \
+ RKCANFD_REG_INT_TX_FINISH_INT | \
+ RKCANFD_REG_INT_RX_FINISH_INT)
+
+#define RKCANFD_REG_INT_ALL_ERROR \
+ (RKCANFD_REG_INT_BUS_OFF_INT | \
+ RKCANFD_REG_INT_ERROR_INT | \
+ RKCANFD_REG_INT_PASSIVE_ERROR_INT | \
+ RKCANFD_REG_INT_ERROR_WARNING_INT)
+
+#define RKCANFD_REG_INT_MASK 0x010
+
+#define RKCANFD_REG_DMA_CTL 0x014
+#define RKCANFD_REG_DMA_CTL_DMA_RX_MODE BIT(1)
+#define RKCANFD_REG_DMA_CTL_DMA_TX_MODE BIT(9)
+
+#define RKCANFD_REG_BITTIMING 0x018
+#define RKCANFD_REG_BITTIMING_SAMPLE_MODE BIT(16)
+#define RKCANFD_REG_BITTIMING_SJW GENMASK(15, 14)
+#define RKCANFD_REG_BITTIMING_BRP GENMASK(13, 8)
+#define RKCANFD_REG_BITTIMING_TSEG2 GENMASK(6, 4)
+#define RKCANFD_REG_BITTIMING_TSEG1 GENMASK(3, 0)
+
+#define RKCANFD_REG_ARBITFAIL 0x028
+#define RKCANFD_REG_ARBITFAIL_ARBIT_FAIL_CODE GENMASK(6, 0)
+
+/* Register seems to be clear or read */
+#define RKCANFD_REG_ERROR_CODE 0x02c
+#define RKCANFD_REG_ERROR_CODE_PHASE BIT(29)
+#define RKCANFD_REG_ERROR_CODE_TYPE GENMASK(28, 26)
+#define RKCANFD_REG_ERROR_CODE_TYPE_BIT 0x0
+#define RKCANFD_REG_ERROR_CODE_TYPE_STUFF 0x1
+#define RKCANFD_REG_ERROR_CODE_TYPE_FORM 0x2
+#define RKCANFD_REG_ERROR_CODE_TYPE_ACK 0x3
+#define RKCANFD_REG_ERROR_CODE_TYPE_CRC 0x4
+#define RKCANFD_REG_ERROR_CODE_DIRECTION_RX BIT(25)
+#define RKCANFD_REG_ERROR_CODE_TX GENMASK(24, 16)
+#define RKCANFD_REG_ERROR_CODE_TX_OVERLOAD BIT(24)
+#define RKCANFD_REG_ERROR_CODE_TX_ERROR BIT(23)
+#define RKCANFD_REG_ERROR_CODE_TX_ACK BIT(22)
+#define RKCANFD_REG_ERROR_CODE_TX_ACK_EOF BIT(21)
+#define RKCANFD_REG_ERROR_CODE_TX_CRC BIT(20)
+#define RKCANFD_REG_ERROR_CODE_TX_STUFF_COUNT BIT(19)
+#define RKCANFD_REG_ERROR_CODE_TX_DATA BIT(18)
+#define RKCANFD_REG_ERROR_CODE_TX_SOF_DLC BIT(17)
+#define RKCANFD_REG_ERROR_CODE_TX_IDLE BIT(16)
+#define RKCANFD_REG_ERROR_CODE_RX GENMASK(15, 0)
+#define RKCANFD_REG_ERROR_CODE_RX_BUF_INT BIT(15)
+#define RKCANFD_REG_ERROR_CODE_RX_SPACE BIT(14)
+#define RKCANFD_REG_ERROR_CODE_RX_EOF BIT(13)
+#define RKCANFD_REG_ERROR_CODE_RX_ACK_LIM BIT(12)
+#define RKCANFD_REG_ERROR_CODE_RX_ACK BIT(11)
+#define RKCANFD_REG_ERROR_CODE_RX_CRC_LIM BIT(10)
+#define RKCANFD_REG_ERROR_CODE_RX_CRC BIT(9)
+#define RKCANFD_REG_ERROR_CODE_RX_STUFF_COUNT BIT(8)
+#define RKCANFD_REG_ERROR_CODE_RX_DATA BIT(7)
+#define RKCANFD_REG_ERROR_CODE_RX_DLC BIT(6)
+#define RKCANFD_REG_ERROR_CODE_RX_BRS_ESI BIT(5)
+#define RKCANFD_REG_ERROR_CODE_RX_RES BIT(4)
+#define RKCANFD_REG_ERROR_CODE_RX_FDF BIT(3)
+#define RKCANFD_REG_ERROR_CODE_RX_ID2_RTR BIT(2)
+#define RKCANFD_REG_ERROR_CODE_RX_SOF_IDE BIT(1)
+#define RKCANFD_REG_ERROR_CODE_RX_IDLE BIT(0)
+
+#define RKCANFD_REG_ERROR_CODE_NOACK \
+ (FIELD_PREP(RKCANFD_REG_ERROR_CODE_TYPE, \
+ RKCANFD_REG_ERROR_CODE_TYPE_ACK) | \
+ RKCANFD_REG_ERROR_CODE_TX_ACK_EOF | \
+ RKCANFD_REG_ERROR_CODE_RX_ACK)
+
+#define RKCANFD_REG_RXERRORCNT 0x034
+#define RKCANFD_REG_RXERRORCNT_RX_ERR_CNT GENMASK(7, 0)
+
+#define RKCANFD_REG_TXERRORCNT 0x038
+#define RKCANFD_REG_TXERRORCNT_TX_ERR_CNT GENMASK(8, 0)
+
+#define RKCANFD_REG_IDCODE 0x03c
+#define RKCANFD_REG_IDCODE_STANDARD_FRAME_ID GENMASK(10, 0)
+#define RKCANFD_REG_IDCODE_EXTENDED_FRAME_ID GENMASK(28, 0)
+
+#define RKCANFD_REG_IDMASK 0x040
+
+#define RKCANFD_REG_TXFRAMEINFO 0x050
+#define RKCANFD_REG_FRAMEINFO_FRAME_FORMAT BIT(7)
+#define RKCANFD_REG_FRAMEINFO_RTR BIT(6)
+#define RKCANFD_REG_FRAMEINFO_DATA_LENGTH GENMASK(3, 0)
+
+#define RKCANFD_REG_TXID 0x054
+#define RKCANFD_REG_TXID_TX_ID GENMASK(28, 0)
+
+#define RKCANFD_REG_TXDATA0 0x058
+#define RKCANFD_REG_TXDATA1 0x05C
+#define RKCANFD_REG_RXFRAMEINFO 0x060
+#define RKCANFD_REG_RXID 0x064
+#define RKCANFD_REG_RXDATA0 0x068
+#define RKCANFD_REG_RXDATA1 0x06c
+
+#define RKCANFD_REG_RTL_VERSION 0x070
+#define RKCANFD_REG_RTL_VERSION_MAJOR GENMASK(7, 4)
+#define RKCANFD_REG_RTL_VERSION_MINOR GENMASK(3, 0)
+
+#define RKCANFD_REG_FD_NOMINAL_BITTIMING 0x100
+#define RKCANFD_REG_FD_NOMINAL_BITTIMING_SAMPLE_MODE BIT(31)
+#define RKCANFD_REG_FD_NOMINAL_BITTIMING_SJW GENMASK(30, 24)
+#define RKCANFD_REG_FD_NOMINAL_BITTIMING_BRP GENMASK(23, 16)
+#define RKCANFD_REG_FD_NOMINAL_BITTIMING_TSEG2 GENMASK(14, 8)
+#define RKCANFD_REG_FD_NOMINAL_BITTIMING_TSEG1 GENMASK(7, 0)
+
+#define RKCANFD_REG_FD_DATA_BITTIMING 0x104
+#define RKCANFD_REG_FD_DATA_BITTIMING_SAMPLE_MODE BIT(21)
+#define RKCANFD_REG_FD_DATA_BITTIMING_SJW GENMASK(20, 17)
+#define RKCANFD_REG_FD_DATA_BITTIMING_BRP GENMASK(16, 9)
+#define RKCANFD_REG_FD_DATA_BITTIMING_TSEG2 GENMASK(8, 5)
+#define RKCANFD_REG_FD_DATA_BITTIMING_TSEG1 GENMASK(4, 0)
+
+#define RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION 0x108
+#define RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET GENMASK(6, 1)
+#define RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_ENABLE BIT(0)
+
+#define RKCANFD_REG_TIMESTAMP_CTRL 0x10c
+/* datasheet says 6:1, which is wrong */
+#define RKCANFD_REG_TIMESTAMP_CTRL_TIME_BASE_COUNTER_PRESCALE GENMASK(5, 1)
+#define RKCANFD_REG_TIMESTAMP_CTRL_TIME_BASE_COUNTER_ENABLE BIT(0)
+
+#define RKCANFD_REG_TIMESTAMP 0x110
+
+#define RKCANFD_REG_TXEVENT_FIFO_CTRL 0x114
+#define RKCANFD_REG_TXEVENT_FIFO_CTRL_TXE_FIFO_CNT GENMASK(8, 5)
+#define RKCANFD_REG_TXEVENT_FIFO_CTRL_TXE_FIFO_WATERMARK GENMASK(4, 1)
+#define RKCANFD_REG_TXEVENT_FIFO_CTRL_TXE_FIFO_ENABLE BIT(0)
+
+#define RKCANFD_REG_RX_FIFO_CTRL 0x118
+#define RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT GENMASK(6, 4)
+#define RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_FULL_WATERMARK GENMASK(3, 1)
+#define RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_ENABLE BIT(0)
+
+#define RKCANFD_REG_AFC_CTRL 0x11c
+#define RKCANFD_REG_AFC_CTRL_UAF5 BIT(4)
+#define RKCANFD_REG_AFC_CTRL_UAF4 BIT(3)
+#define RKCANFD_REG_AFC_CTRL_UAF3 BIT(2)
+#define RKCANFD_REG_AFC_CTRL_UAF2 BIT(1)
+#define RKCANFD_REG_AFC_CTRL_UAF1 BIT(0)
+
+#define RKCANFD_REG_IDCODE0 0x120
+#define RKCANFD_REG_IDMASK0 0x124
+#define RKCANFD_REG_IDCODE1 0x128
+#define RKCANFD_REG_IDMASK1 0x12c
+#define RKCANFD_REG_IDCODE2 0x130
+#define RKCANFD_REG_IDMASK2 0x134
+#define RKCANFD_REG_IDCODE3 0x138
+#define RKCANFD_REG_IDMASK3 0x13c
+#define RKCANFD_REG_IDCODE4 0x140
+#define RKCANFD_REG_IDMASK4 0x144
+
+#define RKCANFD_REG_FD_TXFRAMEINFO 0x200
+#define RKCANFD_REG_FD_FRAMEINFO_FRAME_FORMAT BIT(7)
+#define RKCANFD_REG_FD_FRAMEINFO_RTR BIT(6)
+#define RKCANFD_REG_FD_FRAMEINFO_FDF BIT(5)
+#define RKCANFD_REG_FD_FRAMEINFO_BRS BIT(4)
+#define RKCANFD_REG_FD_FRAMEINFO_DATA_LENGTH GENMASK(3, 0)
+
+#define RKCANFD_REG_FD_TXID 0x204
+#define RKCANFD_REG_FD_ID_EFF GENMASK(28, 0)
+#define RKCANFD_REG_FD_ID_SFF GENMASK(11, 0)
+
+#define RKCANFD_REG_FD_TXDATA0 0x208
+#define RKCANFD_REG_FD_TXDATA1 0x20c
+#define RKCANFD_REG_FD_TXDATA2 0x210
+#define RKCANFD_REG_FD_TXDATA3 0x214
+#define RKCANFD_REG_FD_TXDATA4 0x218
+#define RKCANFD_REG_FD_TXDATA5 0x21c
+#define RKCANFD_REG_FD_TXDATA6 0x220
+#define RKCANFD_REG_FD_TXDATA7 0x224
+#define RKCANFD_REG_FD_TXDATA8 0x228
+#define RKCANFD_REG_FD_TXDATA9 0x22c
+#define RKCANFD_REG_FD_TXDATA10 0x230
+#define RKCANFD_REG_FD_TXDATA11 0x234
+#define RKCANFD_REG_FD_TXDATA12 0x238
+#define RKCANFD_REG_FD_TXDATA13 0x23c
+#define RKCANFD_REG_FD_TXDATA14 0x240
+#define RKCANFD_REG_FD_TXDATA15 0x244
+
+#define RKCANFD_REG_FD_RXFRAMEINFO 0x300
+#define RKCANFD_REG_FD_RXID 0x304
+#define RKCANFD_REG_FD_RXTIMESTAMP 0x308
+#define RKCANFD_REG_FD_RXDATA0 0x30c
+#define RKCANFD_REG_FD_RXDATA1 0x310
+#define RKCANFD_REG_FD_RXDATA2 0x314
+#define RKCANFD_REG_FD_RXDATA3 0x318
+#define RKCANFD_REG_FD_RXDATA4 0x31c
+#define RKCANFD_REG_FD_RXDATA5 0x320
+#define RKCANFD_REG_FD_RXDATA6 0x320
+#define RKCANFD_REG_FD_RXDATA7 0x328
+#define RKCANFD_REG_FD_RXDATA8 0x32c
+#define RKCANFD_REG_FD_RXDATA9 0x330
+#define RKCANFD_REG_FD_RXDATA10 0x334
+#define RKCANFD_REG_FD_RXDATA11 0x338
+#define RKCANFD_REG_FD_RXDATA12 0x33c
+#define RKCANFD_REG_FD_RXDATA13 0x340
+#define RKCANFD_REG_FD_RXDATA14 0x344
+#define RKCANFD_REG_FD_RXDATA15 0x348
+
+#define RKCANFD_REG_RX_FIFO_RDATA 0x400
+#define RKCANFD_REG_TXE_FIFO_RDATA 0x500
+
+#define DEVICE_NAME "rockchip_canfd"
+#define RKCANFD_NAPI_WEIGHT 32
+#define RKCANFD_TXFIFO_DEPTH 1
+#define RKCANFD_TX_STOP_THRESHOLD 1
+#define RKCANFD_TX_START_THRESHOLD 1
+
+#define RKCANFD_TIMESTAMP_WORK_MAX_DELAY_SEC 60
+#define RKCANFD_ERRATUM_5_SYSCLOCK_HZ_MIN (300 * MEGA)
+
+enum rkcanfd_model {
+ RKCANFD_MODEL_RK3568V2 = 0x35682,
+};
+
+struct rkcanfd_devtype_data {
+ enum rkcanfd_model model;
+};
+
+struct rkcanfd_fifo_header {
+ u32 frameinfo;
+ u32 id;
+ u32 ts;
+};
+
+struct rkcanfd_priv {
+ struct can_priv can;
+ struct can_rx_offload offload;
+ struct net_device *ndev;
+
+ void __iomem *regs;
+ unsigned int tx_head;
+ unsigned int tx_tail;
+
+ u32 reg_mode_default;
+ u32 reg_int_mask_default;
+ struct rkcanfd_devtype_data devtype_data;
+
+ struct reset_control *reset;
+ struct clk_bulk_data *clks;
+ int clks_num;
+};
+
+static inline u32
+rkcanfd_read(const struct rkcanfd_priv *priv, u32 reg)
+{
+ return readl(priv->regs + reg);
+}
+
+static inline void
+rkcanfd_read_rep(const struct rkcanfd_priv *priv, u32 reg,
+ void *buf, unsigned int len)
+{
+ readsl(priv->regs + reg, buf, len / sizeof(u32));
+}
+
+static inline void
+rkcanfd_write(const struct rkcanfd_priv *priv, u32 reg, u32 val)
+{
+ writel(val, priv->regs + reg);
+}
+
+static inline u32
+rkcanfd_get_timestamp(const struct rkcanfd_priv *priv)
+{
+ return rkcanfd_read(priv, RKCANFD_REG_TIMESTAMP);
+}
+
+int rkcanfd_handle_rx_int(struct rkcanfd_priv *priv);
+
+void rkcanfd_timestamp_init(struct rkcanfd_priv *priv);
+
+int rkcanfd_start_xmit(struct sk_buff *skb, struct net_device *ndev);
+
+#endif