modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/drivers/net/can/spi/hi311x.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
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2
 /* CAN bus driver for Holt HI3110 CAN Controller with SPI Interface
2
3
  *
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4
  * Copyright(C) Timesys Corporation 2016
..
..
@@ -11,10 +12,6 @@
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  * - Sascha Hauer, Marc Kleine-Budde, Pengutronix
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  * - Simon Kallweit, intefo AG
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  * Copyright 2007
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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15
  */
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16
 
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 #include <linux/can/core.h>
..
..
@@ -24,7 +21,6 @@
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21
 #include <linux/completion.h>
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 #include <linux/delay.h>
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 #include <linux/device.h>
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-#include <linux/dma-mapping.h>
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24
 #include <linux/freezer.h>
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 #include <linux/interrupt.h>
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 #include <linux/io.h>
..
..
@@ -129,10 +125,6 @@
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125
 
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 #define DEVICE_NAME "hi3110"
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127
 
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-static int hi3110_enable_dma = 1; /* Enable SPI DMA. Default: 1 (On) */
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-module_param(hi3110_enable_dma, int, 0444);
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-MODULE_PARM_DESC(hi3110_enable_dma, "Enable SPI DMA. Default: 1 (On)");
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-
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 static const struct can_bittiming_const hi3110_bittiming_const = {
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 	.name = DEVICE_NAME,
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130
 	.tseg1_min = 2,
..
..
@@ -159,8 +151,6 @@
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151
 
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 	u8 *spi_tx_buf;
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 	u8 *spi_rx_buf;
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-	dma_addr_t spi_tx_dma;
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-	dma_addr_t spi_rx_dma;
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154
 
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 	struct sk_buff *tx_skb;
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 	int tx_len;
..
..
@@ -187,8 +177,7 @@
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177
 
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 	if (priv->tx_skb || priv->tx_len)
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 		net->stats.tx_errors++;
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-	if (priv->tx_skb)
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-		dev_kfree_skb(priv->tx_skb);
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+	dev_kfree_skb(priv->tx_skb);
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 	if (priv->tx_len)
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 		can_free_echo_skb(priv->net, 0);
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 	priv->tx_skb = NULL;
..
..
@@ -220,13 +209,6 @@
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 	int ret;
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210
 
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 	spi_message_init(&m);
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-
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-	if (hi3110_enable_dma) {
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-		t.tx_dma = priv->spi_tx_dma;
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-		t.rx_dma = priv->spi_rx_dma;
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-		m.is_dma_mapped = 1;
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-	}
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-
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 	spi_message_add_tail(&t, &m);
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213
 
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 	ret = spi_sync(spi, &m);
..
..
@@ -688,8 +670,6 @@
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670
 
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 			txerr = hi3110_read(spi, HI3110_READ_TEC);
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 			rxerr = hi3110_read(spi, HI3110_READ_REC);
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-			cf->data[6] = txerr;
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-			cf->data[7] = rxerr;
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 			tx_state = txerr >= rxerr ? new_state : 0;
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 			rx_state = txerr <= rxerr ? new_state : 0;
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 			can_change_state(net, cf, tx_state, rx_state);
..
..
@@ -702,6 +682,9 @@
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 					hi3110_hw_sleep(spi);
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 					break;
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 				}
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+			} else {
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+				cf->data[6] = txerr;
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+				cf->data[7] = rxerr;
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688
 			}
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 		}
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690
 
..
..
@@ -918,43 +901,18 @@
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 	priv->spi = spi;
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 	mutex_init(&priv->hi3110_lock);
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903
 
921
-	/* If requested, allocate DMA buffers */
922
-	if (hi3110_enable_dma) {
923
-		spi->dev.coherent_dma_mask = ~0;
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-
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-		/* Minimum coherent DMA allocation is PAGE_SIZE, so allocate
926
-		 * that much and share it between Tx and Rx DMA buffers.
927
-		 */
928
-		priv->spi_tx_buf = dmam_alloc_coherent(&spi->dev,
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-						       PAGE_SIZE,
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-						       &priv->spi_tx_dma,
931
-						       GFP_DMA);
932
-
933
-		if (priv->spi_tx_buf) {
934
-			priv->spi_rx_buf = (priv->spi_tx_buf + (PAGE_SIZE / 2));
935
-			priv->spi_rx_dma = (dma_addr_t)(priv->spi_tx_dma +
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-							(PAGE_SIZE / 2));
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-		} else {
938
-			/* Fall back to non-DMA */
939
-			hi3110_enable_dma = 0;
940
-		}
904
+	priv->spi_tx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,
905
+					GFP_KERNEL);
906
+	if (!priv->spi_tx_buf) {
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+		ret = -ENOMEM;
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+		goto error_probe;
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 	}
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+	priv->spi_rx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,
911
+					GFP_KERNEL);
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912
 
943
-	/* Allocate non-DMA buffers */
944
-	if (!hi3110_enable_dma) {
945
-		priv->spi_tx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,
946
-						GFP_KERNEL);
947
-		if (!priv->spi_tx_buf) {
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-			ret = -ENOMEM;
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-			goto error_probe;
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-		}
951
-		priv->spi_rx_buf = devm_kzalloc(&spi->dev, HI3110_RX_BUF_LEN,
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-						GFP_KERNEL);
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-
954
-		if (!priv->spi_rx_buf) {
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-			ret = -ENOMEM;
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-			goto error_probe;
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-		}
913
+	if (!priv->spi_rx_buf) {
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+		ret = -ENOMEM;
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+		goto error_probe;
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916
 	}
959
917
 
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918
 	SET_NETDEV_DEV(net, &spi->dev);