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/grcan.c | 57 ++++++++++++++++++++++++++-------------------------------
1 files changed, 26 insertions(+), 31 deletions(-)
diff --git a/kernel/drivers/net/can/grcan.c b/kernel/drivers/net/can/grcan.c
index 7eec1d9..3794a7b 100644
--- a/kernel/drivers/net/can/grcan.c
+++ b/kernel/drivers/net/can/grcan.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Socket CAN driver for Aeroflex Gaisler GRCAN and GRHCAN.
*
@@ -17,11 +18,6 @@
*
* See "Documentation/admin-guide/kernel-parameters.rst" for information on the module
* parameters.
- *
- * 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.
*
* Contributors: Andreas Larsson <andreas@gaisler.com>
*/
@@ -245,13 +241,14 @@
.rxsize = GRCAN_DEFAULT_BUFFER_SIZE, \
}
-#define GRCAN_TXBUG_SAFE_GRLIB_VERSION 0x4100
+#define GRCAN_TXBUG_SAFE_GRLIB_VERSION 4100
#define GRLIB_VERSION_MASK 0xffff
/* GRCAN private data structure */
struct grcan_priv {
struct can_priv can; /* must be the first member */
struct net_device *dev;
+ struct device *ofdev_dev;
struct napi_struct napi;
struct grcan_registers __iomem *regs; /* ioremap'ed registers */
@@ -730,7 +727,7 @@
txrx = "on rx ";
stats->rx_errors++;
}
- netdev_err(dev, "Fatal AHB buss error %s- halting device\n",
+ netdev_err(dev, "Fatal AHB bus error %s- halting device\n",
txrx);
spin_lock_irqsave(&priv->lock, flags);
@@ -928,7 +925,7 @@
struct grcan_priv *priv = netdev_priv(dev);
struct grcan_dma *dma = &priv->dma;
- dma_free_coherent(&dev->dev, dma->base_size, dma->base_buf,
+ dma_free_coherent(priv->ofdev_dev, dma->base_size, dma->base_buf,
dma->base_handle);
memset(dma, 0, sizeof(*dma));
}
@@ -953,7 +950,7 @@
/* Extra GRCAN_BUFFER_ALIGNMENT to allow for alignment */
dma->base_size = lsize + ssize + GRCAN_BUFFER_ALIGNMENT;
- dma->base_buf = dma_alloc_coherent(&dev->dev,
+ dma->base_buf = dma_alloc_coherent(priv->ofdev_dev,
dma->base_size,
&dma->base_handle,
GFP_KERNEL);
@@ -1117,8 +1114,10 @@
priv->closing = true;
if (priv->need_txbug_workaround) {
+ spin_unlock_irqrestore(&priv->lock, flags);
del_timer_sync(&priv->hang_timer);
del_timer_sync(&priv->rr_timer);
+ spin_lock_irqsave(&priv->lock, flags);
}
netif_stop_queue(dev);
grcan_stop_hardware(dev);
@@ -1138,7 +1137,7 @@
return 0;
}
-static int grcan_transmit_catch_up(struct net_device *dev, int budget)
+static void grcan_transmit_catch_up(struct net_device *dev)
{
struct grcan_priv *priv = netdev_priv(dev);
unsigned long flags;
@@ -1146,7 +1145,7 @@
spin_lock_irqsave(&priv->lock, flags);
- work_done = catch_up_echo_skb(dev, budget, true);
+ work_done = catch_up_echo_skb(dev, -1, true);
if (work_done) {
if (!priv->resetting && !priv->closing &&
!(priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY))
@@ -1160,8 +1159,6 @@
}
spin_unlock_irqrestore(&priv->lock, flags);
-
- return work_done;
}
static int grcan_receive(struct net_device *dev, int budget)
@@ -1243,19 +1240,13 @@
struct net_device *dev = priv->dev;
struct grcan_registers __iomem *regs = priv->regs;
unsigned long flags;
- int tx_work_done, rx_work_done;
- int rx_budget = budget / 2;
- int tx_budget = budget - rx_budget;
+ int work_done;
- /* Half of the budget for receiveing messages */
- rx_work_done = grcan_receive(dev, rx_budget);
+ work_done = grcan_receive(dev, budget);
- /* Half of the budget for transmitting messages as that can trigger echo
- * frames being received
- */
- tx_work_done = grcan_transmit_catch_up(dev, tx_budget);
+ grcan_transmit_catch_up(dev);
- if (rx_work_done < rx_budget && tx_work_done < tx_budget) {
+ if (work_done < budget) {
napi_complete(napi);
/* Guarantee no interference with a running reset that otherwise
@@ -1272,7 +1263,7 @@
spin_unlock_irqrestore(&priv->lock, flags);
}
- return rx_work_done + tx_work_done;
+ return work_done;
}
/* Work tx bug by waiting while for the risky situation to clear. If that fails,
@@ -1604,6 +1595,7 @@
memcpy(&priv->config, &grcan_module_config,
sizeof(struct grcan_device_config));
priv->dev = dev;
+ priv->ofdev_dev = &ofdev->dev;
priv->regs = base;
priv->can.bittiming_const = &grcan_bittiming_const;
priv->can.do_set_bittiming = grcan_set_bittiming;
@@ -1656,7 +1648,7 @@
static int grcan_probe(struct platform_device *ofdev)
{
struct device_node *np = ofdev->dev.of_node;
- struct resource *res;
+ struct device_node *sysid_parent;
u32 sysid, ambafreq;
int irq, err;
void __iomem *base;
@@ -1665,10 +1657,14 @@
/* Compare GRLIB version number with the first that does not
* have the tx bug (see start_xmit)
*/
- err = of_property_read_u32(np, "systemid", &sysid);
- if (!err && ((sysid & GRLIB_VERSION_MASK)
- >= GRCAN_TXBUG_SAFE_GRLIB_VERSION))
- txbug = false;
+ sysid_parent = of_find_node_by_path("/ambapp0");
+ if (sysid_parent) {
+ err = of_property_read_u32(sysid_parent, "systemid", &sysid);
+ if (!err && ((sysid & GRLIB_VERSION_MASK) >=
+ GRCAN_TXBUG_SAFE_GRLIB_VERSION))
+ txbug = false;
+ of_node_put(sysid_parent);
+ }
err = of_property_read_u32(np, "freq", &ambafreq);
if (err) {
@@ -1676,8 +1672,7 @@
goto exit_error;
}
- res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
- base = devm_ioremap_resource(&ofdev->dev, res);
+ base = devm_platform_ioremap_resource(ofdev, 0);
if (IS_ERR(base)) {
err = PTR_ERR(base);
goto exit_error;
--
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