From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/net/can/xilinx_can.c | 482 +++++++++++++++++++++++++++++++++++++++-------------
1 files changed, 357 insertions(+), 125 deletions(-)
diff --git a/kernel/drivers/net/can/xilinx_can.c b/kernel/drivers/net/can/xilinx_can.c
index 90447a4..1a3fba3 100644
--- a/kernel/drivers/net/can/xilinx_can.c
+++ b/kernel/drivers/net/can/xilinx_can.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* Xilinx CAN device driver
*
* Copyright (C) 2012 - 2014 Xilinx, Inc.
@@ -6,15 +7,6 @@
*
* Description:
* This driver is developed for Axi CAN IP and for Zynq CANPS Controller.
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/clk.h>
@@ -58,22 +50,32 @@
XCAN_AFR_OFFSET = 0x60, /* Acceptance Filter */
/* only on CAN FD cores */
+ XCAN_F_BRPR_OFFSET = 0x088, /* Data Phase Baud Rate
+ * Prescalar
+ */
+ XCAN_F_BTR_OFFSET = 0x08C, /* Data Phase Bit Timing */
XCAN_TRR_OFFSET = 0x0090, /* TX Buffer Ready Request */
XCAN_AFR_EXT_OFFSET = 0x00E0, /* Acceptance Filter */
XCAN_FSR_OFFSET = 0x00E8, /* RX FIFO Status */
XCAN_TXMSG_BASE_OFFSET = 0x0100, /* TX Message Space */
XCAN_RXMSG_BASE_OFFSET = 0x1100, /* RX Message Space */
+ XCAN_RXMSG_2_BASE_OFFSET = 0x2100, /* RX Message Space */
+ XCAN_AFR_2_MASK_OFFSET = 0x0A00, /* Acceptance Filter MASK */
+ XCAN_AFR_2_ID_OFFSET = 0x0A04, /* Acceptance Filter ID */
};
#define XCAN_FRAME_ID_OFFSET(frame_base) ((frame_base) + 0x00)
#define XCAN_FRAME_DLC_OFFSET(frame_base) ((frame_base) + 0x04)
#define XCAN_FRAME_DW1_OFFSET(frame_base) ((frame_base) + 0x08)
#define XCAN_FRAME_DW2_OFFSET(frame_base) ((frame_base) + 0x0C)
+#define XCANFD_FRAME_DW_OFFSET(frame_base) ((frame_base) + 0x08)
#define XCAN_CANFD_FRAME_SIZE 0x48
#define XCAN_TXMSG_FRAME_OFFSET(n) (XCAN_TXMSG_BASE_OFFSET + \
XCAN_CANFD_FRAME_SIZE * (n))
#define XCAN_RXMSG_FRAME_OFFSET(n) (XCAN_RXMSG_BASE_OFFSET + \
+ XCAN_CANFD_FRAME_SIZE * (n))
+#define XCAN_RXMSG_2_FRAME_OFFSET(n) (XCAN_RXMSG_2_BASE_OFFSET + \
XCAN_CANFD_FRAME_SIZE * (n))
/* the single TX mailbox used by this driver on CAN FD HW */
@@ -123,8 +125,12 @@
#define XCAN_IDR_RTR_MASK 0x00000001 /* Remote TX request */
#define XCAN_DLCR_DLC_MASK 0xF0000000 /* Data length code */
#define XCAN_FSR_FL_MASK 0x00003F00 /* RX Fill Level */
+#define XCAN_2_FSR_FL_MASK 0x00007F00 /* RX Fill Level */
#define XCAN_FSR_IRI_MASK 0x00000080 /* RX Increment Read Index */
#define XCAN_FSR_RI_MASK 0x0000001F /* RX Read Index */
+#define XCAN_2_FSR_RI_MASK 0x0000003F /* RX Read Index */
+#define XCAN_DLCR_EDL_MASK 0x08000000 /* EDL Mask in DLC */
+#define XCAN_DLCR_BRS_MASK 0x04000000 /* BRS Mask in DLC */
/* CAN register bit shift - XCAN_<REG>_<BIT>_SHIFT */
#define XCAN_BTR_SJW_SHIFT 7 /* Synchronous jump width */
@@ -138,6 +144,7 @@
/* CAN frame length constants */
#define XCAN_FRAME_MAX_DATA_LEN 8
+#define XCANFD_DW_BYTES 4
#define XCAN_TIMEOUT (1 * HZ)
/* TX-FIFO-empty interrupt available */
@@ -152,8 +159,17 @@
* instead of the regular FIFO at 0x50
*/
#define XCAN_FLAG_RX_FIFO_MULTI 0x0010
+#define XCAN_FLAG_CANFD_2 0x0020
+
+enum xcan_ip_type {
+ XAXI_CAN = 0,
+ XZYNQ_CANPS,
+ XAXI_CANFD,
+ XAXI_CANFD_2_0,
+};
struct xcan_devtype_data {
+ enum xcan_ip_type cantype;
unsigned int flags;
const struct can_bittiming_const *bittiming_const;
const char *bus_clk_name;
@@ -180,14 +196,14 @@
*/
struct xcan_priv {
struct can_priv can;
- spinlock_t tx_lock;
+ spinlock_t tx_lock; /* Lock for synchronizing TX interrupt handling */
unsigned int tx_head;
unsigned int tx_tail;
unsigned int tx_max;
struct napi_struct napi;
u32 (*read_reg)(const struct xcan_priv *priv, enum xcan_reg reg);
void (*write_reg)(const struct xcan_priv *priv, enum xcan_reg reg,
- u32 val);
+ u32 val);
struct device *dev;
void __iomem *reg_base;
unsigned long irq_flags;
@@ -209,10 +225,50 @@
.brp_inc = 1,
};
+/* AXI CANFD Arbitration Bittiming constants as per AXI CANFD 1.0 spec */
static const struct can_bittiming_const xcan_bittiming_const_canfd = {
.name = DRIVER_NAME,
.tseg1_min = 1,
.tseg1_max = 64,
+ .tseg2_min = 1,
+ .tseg2_max = 16,
+ .sjw_max = 16,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+};
+
+/* AXI CANFD Data Bittiming constants as per AXI CANFD 1.0 specs */
+static const struct can_bittiming_const xcan_data_bittiming_const_canfd = {
+ .name = DRIVER_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 16,
+ .tseg2_min = 1,
+ .tseg2_max = 8,
+ .sjw_max = 8,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+};
+
+/* AXI CANFD 2.0 Arbitration Bittiming constants as per AXI CANFD 2.0 spec */
+static const struct can_bittiming_const xcan_bittiming_const_canfd2 = {
+ .name = DRIVER_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 256,
+ .tseg2_min = 1,
+ .tseg2_max = 128,
+ .sjw_max = 128,
+ .brp_min = 1,
+ .brp_max = 256,
+ .brp_inc = 1,
+};
+
+/* AXI CANFD 2.0 Data Bittiming constants as per AXI CANFD 2.0 spec */
+static const struct can_bittiming_const xcan_data_bittiming_const_canfd2 = {
+ .name = DRIVER_NAME,
+ .tseg1_min = 1,
+ .tseg1_max = 32,
.tseg2_min = 1,
.tseg2_max = 16,
.sjw_max = 16,
@@ -230,7 +286,7 @@
* Write data to the paricular CAN register
*/
static void xcan_write_reg_le(const struct xcan_priv *priv, enum xcan_reg reg,
- u32 val)
+ u32 val)
{
iowrite32(val, priv->reg_base + reg);
}
@@ -257,7 +313,7 @@
* Write data to the paricular CAN register
*/
static void xcan_write_reg_be(const struct xcan_priv *priv, enum xcan_reg reg,
- u32 val)
+ u32 val)
{
iowrite32be(val, priv->reg_base + reg);
}
@@ -335,6 +391,7 @@
{
struct xcan_priv *priv = netdev_priv(ndev);
struct can_bittiming *bt = &priv->can.bittiming;
+ struct can_bittiming *dbt = &priv->can.data_bittiming;
u32 btr0, btr1;
u32 is_config_mode;
@@ -345,7 +402,7 @@
XCAN_SR_CONFIG_MASK;
if (!is_config_mode) {
netdev_alert(ndev,
- "BUG! Cannot set bittiming - CAN is not in config mode\n");
+ "BUG! Cannot set bittiming - CAN is not in config mode\n");
return -EPERM;
}
@@ -364,9 +421,27 @@
priv->write_reg(priv, XCAN_BRPR_OFFSET, btr0);
priv->write_reg(priv, XCAN_BTR_OFFSET, btr1);
+ if (priv->devtype.cantype == XAXI_CANFD ||
+ priv->devtype.cantype == XAXI_CANFD_2_0) {
+ /* Setting Baud Rate prescalar value in F_BRPR Register */
+ btr0 = dbt->brp - 1;
+
+ /* Setting Time Segment 1 in BTR Register */
+ btr1 = dbt->prop_seg + dbt->phase_seg1 - 1;
+
+ /* Setting Time Segment 2 in BTR Register */
+ btr1 |= (dbt->phase_seg2 - 1) << priv->devtype.btr_ts2_shift;
+
+ /* Setting Synchronous jump width in BTR Register */
+ btr1 |= (dbt->sjw - 1) << priv->devtype.btr_sjw_shift;
+
+ priv->write_reg(priv, XCAN_F_BRPR_OFFSET, btr0);
+ priv->write_reg(priv, XCAN_F_BTR_OFFSET, btr1);
+ }
+
netdev_dbg(ndev, "BRPR=0x%08x, BTR=0x%08x\n",
- priv->read_reg(priv, XCAN_BRPR_OFFSET),
- priv->read_reg(priv, XCAN_BTR_OFFSET));
+ priv->read_reg(priv, XCAN_BRPR_OFFSET),
+ priv->read_reg(priv, XCAN_BTR_OFFSET));
return 0;
}
@@ -384,9 +459,8 @@
static int xcan_chip_start(struct net_device *ndev)
{
struct xcan_priv *priv = netdev_priv(ndev);
- u32 reg_msr, reg_sr_mask;
+ u32 reg_msr;
int err;
- unsigned long timeout;
u32 ier;
/* Check if it is in reset mode */
@@ -398,7 +472,13 @@
if (err < 0)
return err;
- /* Enable interrupts */
+ /* Enable interrupts
+ *
+ * We enable the ERROR interrupt even with
+ * CAN_CTRLMODE_BERR_REPORTING disabled as there is no
+ * dedicated interrupt for a state change to
+ * ERROR_WARNING/ERROR_PASSIVE.
+ */
ier = XCAN_IXR_TXOK_MASK | XCAN_IXR_BSOFF_MASK |
XCAN_IXR_WKUP_MASK | XCAN_IXR_SLP_MASK |
XCAN_IXR_ERROR_MASK | XCAN_IXR_RXOFLW_MASK |
@@ -410,13 +490,10 @@
priv->write_reg(priv, XCAN_IER_OFFSET, ier);
/* Check whether it is loopback mode or normal mode */
- if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK) {
+ if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
reg_msr = XCAN_MSR_LBACK_MASK;
- reg_sr_mask = XCAN_SR_LBACK_MASK;
- } else {
+ else
reg_msr = 0x0;
- reg_sr_mask = XCAN_SR_NORMAL_MASK;
- }
/* enable the first extended filter, if any, as cores with extended
* filtering default to non-receipt if all filters are disabled
@@ -427,16 +504,8 @@
priv->write_reg(priv, XCAN_MSR_OFFSET, reg_msr);
priv->write_reg(priv, XCAN_SRR_OFFSET, XCAN_SRR_CEN_MASK);
- timeout = jiffies + XCAN_TIMEOUT;
- while (!(priv->read_reg(priv, XCAN_SR_OFFSET) & reg_sr_mask)) {
- if (time_after(jiffies, timeout)) {
- netdev_warn(ndev,
- "timed out for correct mode\n");
- return -ETIMEDOUT;
- }
- }
netdev_dbg(ndev, "status:#x%08x\n",
- priv->read_reg(priv, XCAN_SR_OFFSET));
+ priv->read_reg(priv, XCAN_SR_OFFSET));
priv->can.state = CAN_STATE_ERROR_ACTIVE;
return 0;
@@ -475,14 +544,17 @@
/**
* xcan_write_frame - Write a frame to HW
+ * @ndev: Pointer to net_device structure
* @skb: sk_buff pointer that contains data to be Txed
* @frame_offset: Register offset to write the frame to
*/
-static void xcan_write_frame(struct xcan_priv *priv, struct sk_buff *skb,
+static void xcan_write_frame(struct net_device *ndev, struct sk_buff *skb,
int frame_offset)
{
u32 id, dlc, data[2] = {0, 0};
- struct can_frame *cf = (struct can_frame *)skb->data;
+ struct canfd_frame *cf = (struct canfd_frame *)skb->data;
+ u32 ramoff, dwindex = 0, i;
+ struct xcan_priv *priv = netdev_priv(ndev);
/* Watch carefully on the bit sequence */
if (cf->can_id & CAN_EFF_FLAG) {
@@ -490,7 +562,7 @@
id = ((cf->can_id & CAN_EFF_MASK) << XCAN_IDR_ID2_SHIFT) &
XCAN_IDR_ID2_MASK;
id |= (((cf->can_id & CAN_EFF_MASK) >>
- (CAN_EFF_ID_BITS-CAN_SFF_ID_BITS)) <<
+ (CAN_EFF_ID_BITS - CAN_SFF_ID_BITS)) <<
XCAN_IDR_ID1_SHIFT) & XCAN_IDR_ID1_MASK;
/* The substibute remote TX request bit should be "1"
@@ -511,31 +583,59 @@
id |= XCAN_IDR_SRR_MASK;
}
- dlc = cf->can_dlc << XCAN_DLCR_DLC_SHIFT;
+ dlc = can_len2dlc(cf->len) << XCAN_DLCR_DLC_SHIFT;
+ if (can_is_canfd_skb(skb)) {
+ if (cf->flags & CANFD_BRS)
+ dlc |= XCAN_DLCR_BRS_MASK;
+ dlc |= XCAN_DLCR_EDL_MASK;
+ }
- if (cf->can_dlc > 0)
- data[0] = be32_to_cpup((__be32 *)(cf->data + 0));
- if (cf->can_dlc > 4)
- data[1] = be32_to_cpup((__be32 *)(cf->data + 4));
+ if (!(priv->devtype.flags & XCAN_FLAG_TX_MAILBOXES) &&
+ (priv->devtype.flags & XCAN_FLAG_TXFEMP))
+ can_put_echo_skb(skb, ndev, priv->tx_head % priv->tx_max);
+ else
+ can_put_echo_skb(skb, ndev, 0);
+
+ priv->tx_head++;
priv->write_reg(priv, XCAN_FRAME_ID_OFFSET(frame_offset), id);
/* If the CAN frame is RTR frame this write triggers transmission
* (not on CAN FD)
*/
priv->write_reg(priv, XCAN_FRAME_DLC_OFFSET(frame_offset), dlc);
- if (!(cf->can_id & CAN_RTR_FLAG)) {
- priv->write_reg(priv, XCAN_FRAME_DW1_OFFSET(frame_offset),
- data[0]);
- /* If the CAN frame is Standard/Extended frame this
- * write triggers transmission (not on CAN FD)
- */
- priv->write_reg(priv, XCAN_FRAME_DW2_OFFSET(frame_offset),
- data[1]);
+ if (priv->devtype.cantype == XAXI_CANFD ||
+ priv->devtype.cantype == XAXI_CANFD_2_0) {
+ for (i = 0; i < cf->len; i += 4) {
+ ramoff = XCANFD_FRAME_DW_OFFSET(frame_offset) +
+ (dwindex * XCANFD_DW_BYTES);
+ priv->write_reg(priv, ramoff,
+ be32_to_cpup((__be32 *)(cf->data + i)));
+ dwindex++;
+ }
+ } else {
+ if (cf->len > 0)
+ data[0] = be32_to_cpup((__be32 *)(cf->data + 0));
+ if (cf->len > 4)
+ data[1] = be32_to_cpup((__be32 *)(cf->data + 4));
+
+ if (!(cf->can_id & CAN_RTR_FLAG)) {
+ priv->write_reg(priv,
+ XCAN_FRAME_DW1_OFFSET(frame_offset),
+ data[0]);
+ /* If the CAN frame is Standard/Extended frame this
+ * write triggers transmission (not on CAN FD)
+ */
+ priv->write_reg(priv,
+ XCAN_FRAME_DW2_OFFSET(frame_offset),
+ data[1]);
+ }
}
}
/**
* xcan_start_xmit_fifo - Starts the transmission (FIFO mode)
+ * @skb: sk_buff pointer that contains data to be Txed
+ * @ndev: Pointer to net_device structure
*
* Return: 0 on success, -ENOSPC if FIFO is full.
*/
@@ -549,13 +649,9 @@
XCAN_SR_TXFLL_MASK))
return -ENOSPC;
- can_put_echo_skb(skb, ndev, priv->tx_head % priv->tx_max);
-
spin_lock_irqsave(&priv->tx_lock, flags);
- priv->tx_head++;
-
- xcan_write_frame(priv, skb, XCAN_TXFIFO_OFFSET);
+ xcan_write_frame(ndev, skb, XCAN_TXFIFO_OFFSET);
/* Clear TX-FIFO-empty interrupt for xcan_tx_interrupt() */
if (priv->tx_max > 1)
@@ -572,6 +668,8 @@
/**
* xcan_start_xmit_mailbox - Starts the transmission (mailbox mode)
+ * @skb: sk_buff pointer that contains data to be Txed
+ * @ndev: Pointer to net_device structure
*
* Return: 0 on success, -ENOSPC if there is no space
*/
@@ -584,13 +682,9 @@
BIT(XCAN_TX_MAILBOX_IDX)))
return -ENOSPC;
- can_put_echo_skb(skb, ndev, 0);
-
spin_lock_irqsave(&priv->tx_lock, flags);
- priv->tx_head++;
-
- xcan_write_frame(priv, skb,
+ xcan_write_frame(ndev, skb,
XCAN_TXMSG_FRAME_OFFSET(XCAN_TX_MAILBOX_IDX));
/* Mark buffer as ready for transmit */
@@ -697,6 +791,88 @@
}
stats->rx_bytes += cf->can_dlc;
+ stats->rx_packets++;
+ netif_receive_skb(skb);
+
+ return 1;
+}
+
+/**
+ * xcanfd_rx - Is called from CAN isr to complete the received
+ * frame processing
+ * @ndev: Pointer to net_device structure
+ * @frame_base: Register offset to the frame to be read
+ *
+ * This function is invoked from the CAN isr(poll) to process the Rx frames. It
+ * does minimal processing and invokes "netif_receive_skb" to complete further
+ * processing.
+ * Return: 1 on success and 0 on failure.
+ */
+static int xcanfd_rx(struct net_device *ndev, int frame_base)
+{
+ struct xcan_priv *priv = netdev_priv(ndev);
+ struct net_device_stats *stats = &ndev->stats;
+ struct canfd_frame *cf;
+ struct sk_buff *skb;
+ u32 id_xcan, dlc, data[2] = {0, 0}, dwindex = 0, i, dw_offset;
+
+ id_xcan = priv->read_reg(priv, XCAN_FRAME_ID_OFFSET(frame_base));
+ dlc = priv->read_reg(priv, XCAN_FRAME_DLC_OFFSET(frame_base));
+ if (dlc & XCAN_DLCR_EDL_MASK)
+ skb = alloc_canfd_skb(ndev, &cf);
+ else
+ skb = alloc_can_skb(ndev, (struct can_frame **)&cf);
+
+ if (unlikely(!skb)) {
+ stats->rx_dropped++;
+ return 0;
+ }
+
+ /* Change Xilinx CANFD data length format to socketCAN data
+ * format
+ */
+ if (dlc & XCAN_DLCR_EDL_MASK)
+ cf->len = can_dlc2len((dlc & XCAN_DLCR_DLC_MASK) >>
+ XCAN_DLCR_DLC_SHIFT);
+ else
+ cf->len = get_can_dlc((dlc & XCAN_DLCR_DLC_MASK) >>
+ XCAN_DLCR_DLC_SHIFT);
+
+ /* Change Xilinx CAN ID format to socketCAN ID format */
+ if (id_xcan & XCAN_IDR_IDE_MASK) {
+ /* The received frame is an Extended format frame */
+ cf->can_id = (id_xcan & XCAN_IDR_ID1_MASK) >> 3;
+ cf->can_id |= (id_xcan & XCAN_IDR_ID2_MASK) >>
+ XCAN_IDR_ID2_SHIFT;
+ cf->can_id |= CAN_EFF_FLAG;
+ if (id_xcan & XCAN_IDR_RTR_MASK)
+ cf->can_id |= CAN_RTR_FLAG;
+ } else {
+ /* The received frame is a standard format frame */
+ cf->can_id = (id_xcan & XCAN_IDR_ID1_MASK) >>
+ XCAN_IDR_ID1_SHIFT;
+ if (!(dlc & XCAN_DLCR_EDL_MASK) && (id_xcan &
+ XCAN_IDR_SRR_MASK))
+ cf->can_id |= CAN_RTR_FLAG;
+ }
+
+ /* Check the frame received is FD or not*/
+ if (dlc & XCAN_DLCR_EDL_MASK) {
+ for (i = 0; i < cf->len; i += 4) {
+ dw_offset = XCANFD_FRAME_DW_OFFSET(frame_base) +
+ (dwindex * XCANFD_DW_BYTES);
+ data[0] = priv->read_reg(priv, dw_offset);
+ *(__be32 *)(cf->data + i) = cpu_to_be32(data[0]);
+ dwindex++;
+ }
+ } else {
+ for (i = 0; i < cf->len; i += 4) {
+ dw_offset = XCANFD_FRAME_DW_OFFSET(frame_base);
+ data[0] = priv->read_reg(priv, dw_offset + i);
+ *(__be32 *)(cf->data + i) = cpu_to_be32(data[0]);
+ }
+ }
+ stats->rx_bytes += cf->len;
stats->rx_packets++;
netif_receive_skb(skb);
@@ -813,11 +989,8 @@
{
struct xcan_priv *priv = netdev_priv(ndev);
struct net_device_stats *stats = &ndev->stats;
- struct can_frame *cf;
- struct sk_buff *skb;
+ struct can_frame cf = { };
u32 err_status;
-
- skb = alloc_can_err_skb(ndev, &cf);
err_status = priv->read_reg(priv, XCAN_ESR_OFFSET);
priv->write_reg(priv, XCAN_ESR_OFFSET, err_status);
@@ -828,32 +1001,27 @@
/* Leave device in Config Mode in bus-off state */
priv->write_reg(priv, XCAN_SRR_OFFSET, XCAN_SRR_RESET_MASK);
can_bus_off(ndev);
- if (skb)
- cf->can_id |= CAN_ERR_BUSOFF;
+ cf.can_id |= CAN_ERR_BUSOFF;
} else {
enum can_state new_state = xcan_current_error_state(ndev);
if (new_state != priv->can.state)
- xcan_set_error_state(ndev, new_state, skb ? cf : NULL);
+ xcan_set_error_state(ndev, new_state, &cf);
}
/* Check for Arbitration lost interrupt */
if (isr & XCAN_IXR_ARBLST_MASK) {
priv->can.can_stats.arbitration_lost++;
- if (skb) {
- cf->can_id |= CAN_ERR_LOSTARB;
- cf->data[0] = CAN_ERR_LOSTARB_UNSPEC;
- }
+ cf.can_id |= CAN_ERR_LOSTARB;
+ cf.data[0] = CAN_ERR_LOSTARB_UNSPEC;
}
/* Check for RX FIFO Overflow interrupt */
if (isr & XCAN_IXR_RXOFLW_MASK) {
stats->rx_over_errors++;
stats->rx_errors++;
- if (skb) {
- cf->can_id |= CAN_ERR_CRTL;
- cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
- }
+ cf.can_id |= CAN_ERR_CRTL;
+ cf.data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
}
/* Check for RX Match Not Finished interrupt */
@@ -861,72 +1029,81 @@
stats->rx_dropped++;
stats->rx_errors++;
netdev_err(ndev, "RX match not finished, frame discarded\n");
- if (skb) {
- cf->can_id |= CAN_ERR_CRTL;
- cf->data[1] |= CAN_ERR_CRTL_UNSPEC;
- }
+ cf.can_id |= CAN_ERR_CRTL;
+ cf.data[1] |= CAN_ERR_CRTL_UNSPEC;
}
/* Check for error interrupt */
if (isr & XCAN_IXR_ERROR_MASK) {
- if (skb)
- cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
+ bool berr_reporting = false;
+
+ if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING) {
+ berr_reporting = true;
+ cf.can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
+ }
/* Check for Ack error interrupt */
if (err_status & XCAN_ESR_ACKER_MASK) {
stats->tx_errors++;
- if (skb) {
- cf->can_id |= CAN_ERR_ACK;
- cf->data[3] = CAN_ERR_PROT_LOC_ACK;
+ if (berr_reporting) {
+ cf.can_id |= CAN_ERR_ACK;
+ cf.data[3] = CAN_ERR_PROT_LOC_ACK;
}
}
/* Check for Bit error interrupt */
if (err_status & XCAN_ESR_BERR_MASK) {
stats->tx_errors++;
- if (skb) {
- cf->can_id |= CAN_ERR_PROT;
- cf->data[2] = CAN_ERR_PROT_BIT;
+ if (berr_reporting) {
+ cf.can_id |= CAN_ERR_PROT;
+ cf.data[2] = CAN_ERR_PROT_BIT;
}
}
/* Check for Stuff error interrupt */
if (err_status & XCAN_ESR_STER_MASK) {
stats->rx_errors++;
- if (skb) {
- cf->can_id |= CAN_ERR_PROT;
- cf->data[2] = CAN_ERR_PROT_STUFF;
+ if (berr_reporting) {
+ cf.can_id |= CAN_ERR_PROT;
+ cf.data[2] = CAN_ERR_PROT_STUFF;
}
}
/* Check for Form error interrupt */
if (err_status & XCAN_ESR_FMER_MASK) {
stats->rx_errors++;
- if (skb) {
- cf->can_id |= CAN_ERR_PROT;
- cf->data[2] = CAN_ERR_PROT_FORM;
+ if (berr_reporting) {
+ cf.can_id |= CAN_ERR_PROT;
+ cf.data[2] = CAN_ERR_PROT_FORM;
}
}
/* Check for CRC error interrupt */
if (err_status & XCAN_ESR_CRCER_MASK) {
stats->rx_errors++;
- if (skb) {
- cf->can_id |= CAN_ERR_PROT;
- cf->data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
+ if (berr_reporting) {
+ cf.can_id |= CAN_ERR_PROT;
+ cf.data[3] = CAN_ERR_PROT_LOC_CRC_SEQ;
}
}
- priv->can.can_stats.bus_error++;
+ priv->can.can_stats.bus_error++;
}
- if (skb) {
- stats->rx_packets++;
- stats->rx_bytes += cf->can_dlc;
- netif_rx(skb);
+ if (cf.can_id) {
+ struct can_frame *skb_cf;
+ struct sk_buff *skb = alloc_can_err_skb(ndev, &skb_cf);
+
+ if (skb) {
+ skb_cf->can_id |= cf.can_id;
+ memcpy(skb_cf->data, cf.data, CAN_ERR_DLC);
+ stats->rx_packets++;
+ stats->rx_bytes += CAN_ERR_DLC;
+ netif_rx(skb);
+ }
}
netdev_dbg(ndev, "%s: error status register:0x%x\n",
- __func__, priv->read_reg(priv, XCAN_ESR_OFFSET));
+ __func__, priv->read_reg(priv, XCAN_ESR_OFFSET));
}
/**
@@ -952,6 +1129,7 @@
/**
* xcan_rx_fifo_get_next_frame - Get register offset of next RX frame
+ * @priv: Driver private data structure
*
* Return: Register offset of the next frame in RX FIFO.
*/
@@ -960,7 +1138,7 @@
int offset;
if (priv->devtype.flags & XCAN_FLAG_RX_FIFO_MULTI) {
- u32 fsr;
+ u32 fsr, mask;
/* clear RXOK before the is-empty check so that any newly
* received frame will reassert it without a race
@@ -970,10 +1148,20 @@
fsr = priv->read_reg(priv, XCAN_FSR_OFFSET);
/* check if RX FIFO is empty */
- if (!(fsr & XCAN_FSR_FL_MASK))
+ if (priv->devtype.flags & XCAN_FLAG_CANFD_2)
+ mask = XCAN_2_FSR_FL_MASK;
+ else
+ mask = XCAN_FSR_FL_MASK;
+
+ if (!(fsr & mask))
return -ENOENT;
- offset = XCAN_RXMSG_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);
+ if (priv->devtype.flags & XCAN_FLAG_CANFD_2)
+ offset =
+ XCAN_RXMSG_2_FRAME_OFFSET(fsr & XCAN_2_FSR_RI_MASK);
+ else
+ offset =
+ XCAN_RXMSG_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);
} else {
/* check if RX FIFO is empty */
@@ -1008,7 +1196,10 @@
while ((frame_offset = xcan_rx_fifo_get_next_frame(priv)) >= 0 &&
(work_done < quota)) {
- work_done += xcan_rx(ndev, frame_offset);
+ if (xcan_rx_int_mask(priv) & XCAN_IXR_RXOK_MASK)
+ work_done += xcanfd_rx(ndev, frame_offset);
+ else
+ work_done += xcan_rx(ndev, frame_offset);
if (priv->devtype.flags & XCAN_FLAG_RX_FIFO_MULTI)
/* increment read index */
@@ -1083,8 +1274,10 @@
* via TXFEMP handling as we read TXFEMP *after* TXOK
* clear to satisfy (1).
*/
- while ((isr & XCAN_IXR_TXOK_MASK) && !WARN_ON(++retries == 100)) {
- priv->write_reg(priv, XCAN_ICR_OFFSET, XCAN_IXR_TXOK_MASK);
+ while ((isr & XCAN_IXR_TXOK_MASK) &&
+ !WARN_ON(++retries == 100)) {
+ priv->write_reg(priv, XCAN_ICR_OFFSET,
+ XCAN_IXR_TXOK_MASK);
isr = priv->read_reg(priv, XCAN_ISR_OFFSET);
}
@@ -1115,7 +1308,7 @@
/**
* xcan_interrupt - CAN Isr
* @irq: irq number
- * @dev_id: device id poniter
+ * @dev_id: device id pointer
*
* This is the xilinx CAN Isr. It checks for the type of interrupt
* and invokes the corresponding ISR.
@@ -1176,9 +1369,13 @@
static void xcan_chip_stop(struct net_device *ndev)
{
struct xcan_priv *priv = netdev_priv(ndev);
+ int ret;
/* Disable interrupts and leave the can in configuration mode */
- set_reset_mode(ndev);
+ ret = set_reset_mode(ndev);
+ if (ret < 0)
+ netdev_dbg(ndev, "set_reset_mode() Failed\n");
+
priv->can.state = CAN_STATE_STOPPED;
}
@@ -1197,12 +1394,12 @@
ret = pm_runtime_get_sync(priv->dev);
if (ret < 0) {
netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
- __func__, ret);
- return ret;
+ __func__, ret);
+ goto err;
}
ret = request_irq(ndev->irq, xcan_interrupt, priv->irq_flags,
- ndev->name, ndev);
+ ndev->name, ndev);
if (ret < 0) {
netdev_err(ndev, "irq allocation for CAN failed\n");
goto err;
@@ -1273,7 +1470,7 @@
* Return: 0 on success and failure value on error
*/
static int xcan_get_berr_counter(const struct net_device *ndev,
- struct can_berr_counter *bec)
+ struct can_berr_counter *bec)
{
struct xcan_priv *priv = netdev_priv(ndev);
int ret;
@@ -1281,7 +1478,8 @@
ret = pm_runtime_get_sync(priv->dev);
if (ret < 0) {
netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
- __func__, ret);
+ __func__, ret);
+ pm_runtime_put(priv->dev);
return ret;
}
@@ -1293,7 +1491,6 @@
return 0;
}
-
static const struct net_device_ops xcan_netdev_ops = {
.ndo_open = xcan_open,
@@ -1406,6 +1603,8 @@
};
static const struct xcan_devtype_data xcan_zynq_data = {
+ .cantype = XZYNQ_CANPS,
+ .flags = XCAN_FLAG_TXFEMP,
.bittiming_const = &xcan_bittiming_const,
.btr_ts2_shift = XCAN_BTR_TS2_SHIFT,
.btr_sjw_shift = XCAN_BTR_SJW_SHIFT,
@@ -1413,6 +1612,7 @@
};
static const struct xcan_devtype_data xcan_axi_data = {
+ .cantype = XAXI_CAN,
.bittiming_const = &xcan_bittiming_const,
.btr_ts2_shift = XCAN_BTR_TS2_SHIFT,
.btr_sjw_shift = XCAN_BTR_SJW_SHIFT,
@@ -1420,6 +1620,7 @@
};
static const struct xcan_devtype_data xcan_canfd_data = {
+ .cantype = XAXI_CANFD,
.flags = XCAN_FLAG_EXT_FILTERS |
XCAN_FLAG_RXMNF |
XCAN_FLAG_TX_MAILBOXES |
@@ -1430,11 +1631,25 @@
.bus_clk_name = "s_axi_aclk",
};
+static const struct xcan_devtype_data xcan_canfd2_data = {
+ .cantype = XAXI_CANFD_2_0,
+ .flags = XCAN_FLAG_EXT_FILTERS |
+ XCAN_FLAG_RXMNF |
+ XCAN_FLAG_TX_MAILBOXES |
+ XCAN_FLAG_CANFD_2 |
+ XCAN_FLAG_RX_FIFO_MULTI,
+ .bittiming_const = &xcan_bittiming_const_canfd2,
+ .btr_ts2_shift = XCAN_BTR_TS2_SHIFT_CANFD,
+ .btr_sjw_shift = XCAN_BTR_SJW_SHIFT_CANFD,
+ .bus_clk_name = "s_axi_aclk",
+};
+
/* Match table for OF platform binding */
static const struct of_device_id xcan_of_match[] = {
{ .compatible = "xlnx,zynq-can-1.0", .data = &xcan_zynq_data },
{ .compatible = "xlnx,axi-can-1.00.a", .data = &xcan_axi_data },
{ .compatible = "xlnx,canfd-1.0", .data = &xcan_canfd_data },
+ { .compatible = "xlnx,canfd-2.0", .data = &xcan_canfd2_data },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(of, xcan_of_match);
@@ -1450,7 +1665,6 @@
*/
static int xcan_probe(struct platform_device *pdev)
{
- struct resource *res; /* IO mem resources */
struct net_device *ndev;
struct xcan_priv *priv;
const struct of_device_id *of_id;
@@ -1458,12 +1672,11 @@
void __iomem *addr;
int ret;
int rx_max, tx_max;
- int hw_tx_max, hw_rx_max;
+ u32 hw_tx_max = 0, hw_rx_max = 0;
const char *hw_tx_max_property;
/* Get the virtual base address for the device */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- addr = devm_ioremap_resource(&pdev->dev, res);
+ addr = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(addr)) {
ret = PTR_ERR(addr);
goto err;
@@ -1512,7 +1725,7 @@
*/
if (!(devtype->flags & XCAN_FLAG_TX_MAILBOXES) &&
(devtype->flags & XCAN_FLAG_TXFEMP))
- tx_max = min(hw_tx_max, 2);
+ tx_max = min(hw_tx_max, 2U);
else
tx_max = 1;
@@ -1530,6 +1743,19 @@
priv->can.do_get_berr_counter = xcan_get_berr_counter;
priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
CAN_CTRLMODE_BERR_REPORTING;
+
+ if (devtype->cantype == XAXI_CANFD)
+ priv->can.data_bittiming_const =
+ &xcan_data_bittiming_const_canfd;
+
+ if (devtype->cantype == XAXI_CANFD_2_0)
+ priv->can.data_bittiming_const =
+ &xcan_data_bittiming_const_canfd2;
+
+ if (devtype->cantype == XAXI_CANFD ||
+ devtype->cantype == XAXI_CANFD_2_0)
+ priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD;
+
priv->reg_base = addr;
priv->tx_max = tx_max;
priv->devtype = *devtype;
@@ -1551,14 +1777,16 @@
/* Getting the CAN can_clk info */
priv->can_clk = devm_clk_get(&pdev->dev, "can_clk");
if (IS_ERR(priv->can_clk)) {
- dev_err(&pdev->dev, "Device clock not found.\n");
+ if (PTR_ERR(priv->can_clk) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Device clock not found.\n");
ret = PTR_ERR(priv->can_clk);
goto err_free;
}
priv->bus_clk = devm_clk_get(&pdev->dev, devtype->bus_clk_name);
if (IS_ERR(priv->bus_clk)) {
- dev_err(&pdev->dev, "bus clock not found\n");
+ if (PTR_ERR(priv->bus_clk) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "bus clock not found\n");
ret = PTR_ERR(priv->bus_clk);
goto err_free;
}
@@ -1570,8 +1798,8 @@
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) {
netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
- __func__, ret);
- goto err_pmdisable;
+ __func__, ret);
+ goto err_disableclks;
}
if (priv->read_reg(priv, XCAN_SR_OFFSET) != XCAN_SR_CONFIG_MASK) {
@@ -1593,6 +1821,11 @@
pm_runtime_put(&pdev->dev);
+ if (priv->devtype.flags & XCAN_FLAG_CANFD_2) {
+ priv->write_reg(priv, XCAN_AFR_2_ID_OFFSET, 0x00000000);
+ priv->write_reg(priv, XCAN_AFR_2_MASK_OFFSET, 0x00000000);
+ }
+
netdev_dbg(ndev, "reg_base=0x%p irq=%d clock=%d, tx buffers: actual %d, using %d\n",
priv->reg_base, ndev->irq, priv->can.clock.freq,
hw_tx_max, priv->tx_max);
@@ -1601,7 +1834,6 @@
err_disableclks:
pm_runtime_put(priv->dev);
-err_pmdisable:
pm_runtime_disable(&pdev->dev);
err_free:
free_candev(ndev);
--
Gitblit v1.6.2