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CAN: program prod setting for tdcr register

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Using this patch we are programming tdcr register
of can controllers based on the data speed.

Bug 4165928

Change-Id: I4d3f9426695b4ac19bef144f242dcf74371c00b7
Signed-off-by: Manish Bhardwaj <mbhardwaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2924921
Reviewed-by: Suresh Venkatachalam <skathirampat@nvidia.com>
Reviewed-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Manish Bhardwaj
2022-11-02 14:08:41 +00:00
committed by mobile promotions
parent 821e738ecc
commit df0489a1e0
4 changed files with 65 additions and 14 deletions
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57
drivers/net/can/mttcan/hal/m_ttcan.c
View File

@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*/
#include "../include/m_ttcan.h"
@@ -9,6 +9,11 @@
#define MTTCAN_INIT_TIMEOUT 1000
#if KERNEL_VERSION(5, 16, 0) >= LINUX_VERSION_CODE
#define MTTCAN_SPEED_5MBPS 5000000
#define MTTCAN_SPEED_8MBPS 8333333
#endif
void ttcan_print_version(struct ttcan_controller *ttcan)
{
u32 crel, endn;
@@ -288,8 +293,35 @@ inline u32 ttcan_read_ecr(struct ttcan_controller *ttcan)
return ttcan_read32(ttcan, ADR_MTTCAN_ECR);
}
int ttcan_set_bitrate(struct ttcan_controller *ttcan)
#if KERNEL_VERSION(5, 16, 0) >= LINUX_VERSION_CODE
static void tegra_mttcan_config_prod_settings(struct mttcan_priv *priv)
{
struct ttcan_controller *ttcan = priv->ttcan;
char *prod_name;
int ret;
switch (ttcan->bt_config.data.bitrate) {
case MTTCAN_SPEED_5MBPS:
prod_name = "prod_c_can_5m";
break;
case MTTCAN_SPEED_8MBPS:
prod_name = "prod_c_can_8m";
break;
default:
prod_name = "prod_c_can_2m_1m";
break;
}
ret = tegra_prod_set_by_name(&ttcan->base, prod_name,
ttcan->prod_list);
if (ret == 0)
dev_dbg(priv->device, "setting prod: %s\n", prod_name);
}
#endif
int ttcan_set_bitrate(struct mttcan_priv *priv)
{
struct ttcan_controller *ttcan = priv->ttcan;
unsigned int temp_reg;
int ret = 0;
u32 cccr_reg;
@@ -308,12 +340,12 @@ int ttcan_set_bitrate(struct ttcan_controller *ttcan)
nbtp_reg |= (ttcan->bt_config.nominal.brp - 1) <<
MTT_NBTP_NBRP_SHIFT & MTT_NBTP_NBRP_MASK;
pr_debug("%s NBTP(0x%x) value (0x%x)\n", __func__, ADR_MTTCAN_NBTP,
dev_dbg(priv->device, "%s NBTP(0x%x) value (0x%x)\n", __func__, ADR_MTTCAN_NBTP,
nbtp_reg);
ret = ttcan_write32_check(ttcan, ADR_MTTCAN_NBTP, nbtp_reg,
MTTCAN_NBTP_MSK);
if (ret) {
pr_err("%s: Normal bitrate configuration failed\n", __func__);
dev_err(priv->device, "%s: Normal bitrate configuration failed\n", __func__);
return ret;
}
@@ -332,28 +364,33 @@ int ttcan_set_bitrate(struct ttcan_controller *ttcan)
dbtp_reg |= (ttcan->bt_config.data.tdc << MTT_DBTP_TDC_SHIFT) &
MTT_DBTP_TDC_MASK;
#if KERNEL_VERSION(5, 16, 0) < LINUX_VERSION_CODE
tdcr_reg = (ttcan->bt_config.data.tdc_offset <<
MTT_TDCR_TDCO_SHIFT) & MTT_TDCR_TDCO_MASK;
tdcr_reg |= ttcan->tdc_offset;
pr_debug("%s DBTP(0x%x) value (0x%x)\n", __func__,
#endif
dev_dbg(priv->device, "%s DBTP(0x%x) value (0x%x)\n", __func__,
ADR_MTTCAN_DBTP, dbtp_reg);
ret = ttcan_write32_check(ttcan, ADR_MTTCAN_DBTP,
dbtp_reg, MTTCAN_DBTP_MSK);
if (ret) {
pr_err("%s: Fast bitrate configuration failed\n",
__func__);
dev_err(priv->device, "%s: Fast bitrate configuration failed\n", __func__);
return ret;
}
#if KERNEL_VERSION(5, 16, 0) >= LINUX_VERSION_CODE
if (ttcan->prod_list)
tegra_mttcan_config_prod_settings(priv);
#else
ret = ttcan_write32_check(ttcan, ADR_MTTCAN_TDCR,
tdcr_reg, MTTCAN_TDCR_MSK);
if (ret) {
pr_err("%s: Fast bitrate configuration failed\n",
dev_err(priv->device, "%s: Fast bitrate configuration failed\n",
__func__);
return ret;
}
#endif
temp_reg = cccr_reg = ttcan_read32(ttcan, ADR_MTTCAN_CCCR);
if (ttcan->bt_config.fd_flags & CAN_FD_FLAG)
@@ -375,7 +412,7 @@ int ttcan_set_bitrate(struct ttcan_controller *ttcan)
ret = ttcan_write32_check(ttcan, ADR_MTTCAN_CCCR,
cccr_reg, MTTCAN_CCCR_MSK);
if (ret) {
pr_err("%s: Error in enabling FD\n", __func__);
dev_err(priv->device, "%s: Error in enabling FD\n", __func__);
return ret;
}
}

7
drivers/net/can/mttcan/include/m_ttcan.h
View File

@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*/
#ifndef __M_TTCAN_DEF
@@ -287,6 +287,9 @@ struct ttcan_controller {
struct list_head rx_q1;
struct list_head rx_b;
struct list_head tx_evt;
#if KERNEL_VERSION(5, 16, 0) >= LINUX_VERSION_CODE
struct tegra_prod *prod_list;
#endif
void __iomem *base; /* controller regs space should be remapped. */
void __iomem *xbase; /* extra registers are mapped */
void __iomem *mram_vbase;
@@ -494,7 +497,7 @@ void ttcan_set_tx_cancel_request(struct ttcan_controller *ttcan, u32 txbcr);
u32 ttcan_read_tx_cancelled_reg(struct ttcan_controller *ttcan);
u32 ttcan_read_psr(struct ttcan_controller *ttcan);
int ttcan_read_rx_buffer(struct ttcan_controller *ttcan);
int ttcan_set_bitrate(struct ttcan_controller *ttcan);
int ttcan_set_bitrate(struct mttcan_priv *priv);
int ttcan_tx_req_pending(struct ttcan_controller *ttcan);
int ttcan_tx_buff_req_pending(struct ttcan_controller *ttcan, u8 index);

5
drivers/net/can/mttcan/include/m_ttcan_linux.h
View File

@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
*/
#ifndef _M_TTCAN_LINUX_H
@@ -31,6 +31,9 @@
#include <linux/net_tstamp.h>
#include <linux/spinlock.h>
#include <linux/clocksource.h>
#if KERNEL_VERSION(5, 16, 0) >= LINUX_VERSION_CODE
#include <linux/tegra_prod.h>
#endif
#include <linux/platform/tegra/ptp-notifier.h>
#include <linux/mailbox_client.h>
#ifdef CONFIG_CLK_SRC_TEGRA18_US_TIMER

10
drivers/net/can/mttcan/native/m_ttcan_linux.c
View File

@@ -988,7 +988,7 @@ static int mttcan_do_set_bittiming(struct net_device *dev)
if (priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO)
priv->ttcan->bt_config.fd_flags |= CAN_FD_NON_ISO_FLAG;
err = ttcan_set_bitrate(priv->ttcan);
err = ttcan_set_bitrate(priv);
if (err) {
netdev_err(priv->dev, "Unable to set bitrate\n");
return err;
@@ -1906,6 +1906,14 @@ static int mttcan_probe(struct platform_device *pdev)
if (ret)
goto exit_free_device;
#if KERNEL_VERSION(5, 16, 0) >= LINUX_VERSION_CODE
priv->ttcan->prod_list = devm_tegra_prod_get(&pdev->dev);
if (IS_ERR_OR_NULL(priv->ttcan->prod_list)) {
dev_dbg(&pdev->dev, "Prod-setting not available\n");
priv->ttcan->prod_list = NULL;
}
#endif
ret = register_mttcan_dev(dev);
if (ret) {
dev_err(&pdev->dev, "registering %s failed (err=%d)\n",