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path: root/drivers/net/ethernet/vertexcom/mse102x.c
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Diffstat (limited to 'drivers/net/ethernet/vertexcom/mse102x.c')
-rw-r--r--drivers/net/ethernet/vertexcom/mse102x.c80
1 files changed, 46 insertions, 34 deletions
diff --git a/drivers/net/ethernet/vertexcom/mse102x.c b/drivers/net/ethernet/vertexcom/mse102x.c
index e4d993f31374..a75bca1243e3 100644
--- a/drivers/net/ethernet/vertexcom/mse102x.c
+++ b/drivers/net/ethernet/vertexcom/mse102x.c
@@ -8,6 +8,7 @@
#include <linux/if_vlan.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
@@ -16,6 +17,7 @@
#include <linux/cache.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
+#include <linux/string_choices.h>
#include <linux/spi/spi.h>
#include <linux/of_net.h>
@@ -45,7 +47,6 @@
struct mse102x_stats {
u64 xfer_err;
- u64 invalid_cmd;
u64 invalid_ctr;
u64 invalid_dft;
u64 invalid_len;
@@ -56,7 +57,6 @@ struct mse102x_stats {
static const char mse102x_gstrings_stats[][ETH_GSTRING_LEN] = {
"SPI transfer errors",
- "Invalid command",
"Invalid CTR",
"Invalid DFT",
"Invalid frame length",
@@ -85,6 +85,8 @@ struct mse102x_net_spi {
struct spi_message spi_msg;
struct spi_transfer spi_xfer;
+ bool valid_cmd_received;
+
#ifdef CONFIG_DEBUG_FS
struct dentry *device_root;
#endif
@@ -98,16 +100,18 @@ static int mse102x_info_show(struct seq_file *s, void *what)
{
struct mse102x_net_spi *mses = s->private;
- seq_printf(s, "TX ring size : %u\n",
+ seq_printf(s, "TX ring size : %u\n",
skb_queue_len(&mses->mse102x.txq));
- seq_printf(s, "IRQ : %d\n",
+ seq_printf(s, "IRQ : %d\n",
mses->spidev->irq);
- seq_printf(s, "SPI effective speed : %lu\n",
+ seq_printf(s, "SPI effective speed : %lu\n",
(unsigned long)mses->spi_xfer.effective_speed_hz);
- seq_printf(s, "SPI mode : %x\n",
+ seq_printf(s, "SPI mode : %x\n",
mses->spidev->mode);
+ seq_printf(s, "Received valid CMD once : %s\n",
+ str_yes_no(mses->valid_cmd_received));
return 0;
}
@@ -194,10 +198,10 @@ static int mse102x_rx_cmd_spi(struct mse102x_net *mse, u8 *rxb)
} else if (*cmd != cpu_to_be16(DET_CMD)) {
net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n",
__func__, *cmd);
- mse->stats.invalid_cmd++;
ret = -EIO;
} else {
memcpy(rxb, trx + 2, 2);
+ mses->valid_cmd_received = true;
}
return ret;
@@ -306,7 +310,7 @@ static void mse102x_dump_packet(const char *msg, int len, const char *data)
data, len, true);
}
-static void mse102x_rx_pkt_spi(struct mse102x_net *mse)
+static irqreturn_t mse102x_rx_pkt_spi(struct mse102x_net *mse)
{
struct sk_buff *skb;
unsigned int rxalign;
@@ -315,31 +319,20 @@ static void mse102x_rx_pkt_spi(struct mse102x_net *mse)
__be16 rx = 0;
u16 cmd_resp;
u8 *rxpkt;
- int ret;
mse102x_tx_cmd_spi(mse, CMD_CTR);
- ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx);
- cmd_resp = be16_to_cpu(rx);
-
- if (ret || ((cmd_resp & CMD_MASK) != CMD_RTS)) {
+ if (mse102x_rx_cmd_spi(mse, (u8 *)&rx)) {
usleep_range(50, 100);
+ return IRQ_NONE;
+ }
- mse102x_tx_cmd_spi(mse, CMD_CTR);
- ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx);
- if (ret)
- return;
-
- cmd_resp = be16_to_cpu(rx);
- if ((cmd_resp & CMD_MASK) != CMD_RTS) {
- net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n",
- __func__, cmd_resp);
- mse->stats.invalid_rts++;
- drop = true;
- goto drop;
- }
-
- net_dbg_ratelimited("%s: Unexpected response to first CMD\n",
- __func__);
+ cmd_resp = be16_to_cpu(rx);
+ if ((cmd_resp & CMD_MASK) != CMD_RTS) {
+ net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n",
+ __func__, cmd_resp);
+ mse->stats.invalid_rts++;
+ drop = true;
+ goto drop;
}
rxlen = cmd_resp & LEN_MASK;
@@ -360,7 +353,7 @@ drop:
rxalign = ALIGN(rxlen + DET_SOF_LEN + DET_DFT_LEN, 4);
skb = netdev_alloc_skb_ip_align(mse->ndev, rxalign);
if (!skb)
- return;
+ return IRQ_NONE;
/* 2 bytes Start of frame (before ethernet header)
* 2 bytes Data frame tail (after ethernet frame)
@@ -370,7 +363,7 @@ drop:
if (mse102x_rx_frame_spi(mse, rxpkt, rxlen, drop)) {
mse->ndev->stats.rx_errors++;
dev_kfree_skb(skb);
- return;
+ return IRQ_HANDLED;
}
if (netif_msg_pktdata(mse))
@@ -381,6 +374,8 @@ drop:
mse->ndev->stats.rx_packets++;
mse->ndev->stats.rx_bytes += rxlen;
+
+ return IRQ_HANDLED;
}
static int mse102x_tx_pkt_spi(struct mse102x_net *mse, struct sk_buff *txb,
@@ -512,20 +507,36 @@ static irqreturn_t mse102x_irq(int irq, void *_mse)
{
struct mse102x_net *mse = _mse;
struct mse102x_net_spi *mses = to_mse102x_spi(mse);
+ irqreturn_t ret;
mutex_lock(&mses->lock);
- mse102x_rx_pkt_spi(mse);
+ ret = mse102x_rx_pkt_spi(mse);
mutex_unlock(&mses->lock);
- return IRQ_HANDLED;
+ return ret;
}
static int mse102x_net_open(struct net_device *ndev)
{
+ struct irq_data *irq_data = irq_get_irq_data(ndev->irq);
struct mse102x_net *mse = netdev_priv(ndev);
struct mse102x_net_spi *mses = to_mse102x_spi(mse);
int ret;
+ if (!irq_data) {
+ netdev_err(ndev, "Invalid IRQ: %d\n", ndev->irq);
+ return -EINVAL;
+ }
+
+ switch (irqd_get_trigger_type(irq_data)) {
+ case IRQ_TYPE_LEVEL_HIGH:
+ case IRQ_TYPE_LEVEL_LOW:
+ break;
+ default:
+ netdev_warn_once(ndev, "Only IRQ type level recommended, please update your device tree firmware.\n");
+ break;
+ }
+
ret = request_threaded_irq(ndev->irq, NULL, mse102x_irq, IRQF_ONESHOT,
ndev->name, mse);
if (ret < 0) {
@@ -543,7 +554,8 @@ static int mse102x_net_open(struct net_device *ndev)
* So poll for possible packet(s) to re-arm the interrupt.
*/
mutex_lock(&mses->lock);
- mse102x_rx_pkt_spi(mse);
+ if (mse102x_rx_pkt_spi(mse) == IRQ_NONE)
+ mse102x_rx_pkt_spi(mse);
mutex_unlock(&mses->lock);
netif_dbg(mse, ifup, ndev, "network device up\n");
generated by cgit (git 2.34.1) at 2025-05-30 17:56:36 +0000