AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-22 20:43:23 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
fc98e670ad
linux_dsm_epyc7002/drivers/net/ethernet/nuvoton/w90p910_ether.c
Stephen Boyd d1a55841ab net: Remove dev_err() usage after platform_get_irq() 
We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.

// <smpl>
@@
expression ret;
struct platform_device *E;
@@

ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);

if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// </smpl>

While we're here, remove braces on if statements that only have one
statement (manually).

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: netdev@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-07-30 14:37:35 -07:00

1081 lines
25 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2008-2009 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mii.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/ethtool.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/gfp.h>
#define DRV_MODULE_NAME "w90p910-emc"
#define DRV_MODULE_VERSION "0.1"
/* Ethernet MAC Registers */
#define REG_CAMCMR 0x00
#define REG_CAMEN 0x04
#define REG_CAMM_BASE 0x08
#define REG_CAML_BASE 0x0c
#define REG_TXDLSA 0x88
#define REG_RXDLSA 0x8C
#define REG_MCMDR 0x90
#define REG_MIID 0x94
#define REG_MIIDA 0x98
#define REG_FFTCR 0x9C
#define REG_TSDR 0xa0
#define REG_RSDR 0xa4
#define REG_DMARFC 0xa8
#define REG_MIEN 0xac
#define REG_MISTA 0xb0
#define REG_CTXDSA 0xcc
#define REG_CTXBSA 0xd0
#define REG_CRXDSA 0xd4
#define REG_CRXBSA 0xd8
/* mac controller bit */
#define MCMDR_RXON 0x01
#define MCMDR_ACP (0x01 << 3)
#define MCMDR_SPCRC (0x01 << 5)
#define MCMDR_TXON (0x01 << 8)
#define MCMDR_FDUP (0x01 << 18)
#define MCMDR_ENMDC (0x01 << 19)
#define MCMDR_OPMOD (0x01 << 20)
#define SWR (0x01 << 24)
/* cam command regiser */
#define CAMCMR_AUP 0x01
#define CAMCMR_AMP (0x01 << 1)
#define CAMCMR_ABP (0x01 << 2)
#define CAMCMR_CCAM (0x01 << 3)
#define CAMCMR_ECMP (0x01 << 4)
#define CAM0EN 0x01
/* mac mii controller bit */
#define MDCCR (0x0a << 20)
#define PHYAD (0x01 << 8)
#define PHYWR (0x01 << 16)
#define PHYBUSY (0x01 << 17)
#define PHYPRESP (0x01 << 18)
#define CAM_ENTRY_SIZE 0x08
/* rx and tx status */
#define TXDS_TXCP (0x01 << 19)
#define RXDS_CRCE (0x01 << 17)
#define RXDS_PTLE (0x01 << 19)
#define RXDS_RXGD (0x01 << 20)
#define RXDS_ALIE (0x01 << 21)
#define RXDS_RP (0x01 << 22)
/* mac interrupt status*/
#define MISTA_EXDEF (0x01 << 19)
#define MISTA_TXBERR (0x01 << 24)
#define MISTA_TDU (0x01 << 23)
#define MISTA_RDU (0x01 << 10)
#define MISTA_RXBERR (0x01 << 11)
#define ENSTART 0x01
#define ENRXINTR 0x01
#define ENRXGD (0x01 << 4)
#define ENRXBERR (0x01 << 11)
#define ENTXINTR (0x01 << 16)
#define ENTXCP (0x01 << 18)
#define ENTXABT (0x01 << 21)
#define ENTXBERR (0x01 << 24)
#define ENMDC (0x01 << 19)
#define PHYBUSY (0x01 << 17)
#define MDCCR_VAL 0xa00000
/* rx and tx owner bit */
#define RX_OWEN_DMA (0x01 << 31)
#define RX_OWEN_CPU (~(0x03 << 30))
#define TX_OWEN_DMA (0x01 << 31)
#define TX_OWEN_CPU (~(0x01 << 31))
/* tx frame desc controller bit */
#define MACTXINTEN 0x04
#define CRCMODE 0x02
#define PADDINGMODE 0x01
/* fftcr controller bit */
#define TXTHD (0x03 << 8)
#define BLENGTH (0x01 << 20)
/* global setting for driver */
#define RX_DESC_SIZE 50
#define TX_DESC_SIZE 10
#define MAX_RBUFF_SZ 0x600
#define MAX_TBUFF_SZ 0x600
#define TX_TIMEOUT (HZ/2)
#define DELAY 1000
#define CAM0 0x0
static int w90p910_mdio_read(struct net_device *dev, int phy_id, int reg);
struct w90p910_rxbd {
unsigned int sl;
unsigned int buffer;
unsigned int reserved;
unsigned int next;
};
struct w90p910_txbd {
unsigned int mode;
unsigned int buffer;
unsigned int sl;
unsigned int next;
};
struct recv_pdesc {
struct w90p910_rxbd desclist[RX_DESC_SIZE];
char recv_buf[RX_DESC_SIZE][MAX_RBUFF_SZ];
};
struct tran_pdesc {
struct w90p910_txbd desclist[TX_DESC_SIZE];
char tran_buf[TX_DESC_SIZE][MAX_TBUFF_SZ];
};
struct w90p910_ether {
struct recv_pdesc *rdesc;
struct tran_pdesc *tdesc;
dma_addr_t rdesc_phys;
dma_addr_t tdesc_phys;
struct platform_device *pdev;
struct resource *res;
struct sk_buff *skb;
struct clk *clk;
struct clk *rmiiclk;
struct mii_if_info mii;
struct timer_list check_timer;
void __iomem *reg;
int rxirq;
int txirq;
unsigned int cur_tx;
unsigned int cur_rx;
unsigned int finish_tx;
unsigned int rx_packets;
unsigned int rx_bytes;
unsigned int start_tx_ptr;
unsigned int start_rx_ptr;
unsigned int linkflag;
};
static void update_linkspeed_register(struct net_device *dev,
unsigned int speed, unsigned int duplex)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = __raw_readl(ether->reg + REG_MCMDR);
if (speed == SPEED_100) {
/* 100 full/half duplex */
if (duplex == DUPLEX_FULL) {
val |= (MCMDR_OPMOD | MCMDR_FDUP);
} else {
val |= MCMDR_OPMOD;
val &= ~MCMDR_FDUP;
}
} else {
/* 10 full/half duplex */
if (duplex == DUPLEX_FULL) {
val |= MCMDR_FDUP;
val &= ~MCMDR_OPMOD;
} else {
val &= ~(MCMDR_FDUP | MCMDR_OPMOD);
}
}
__raw_writel(val, ether->reg + REG_MCMDR);
}
static void update_linkspeed(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
struct platform_device *pdev;
unsigned int bmsr, bmcr, lpa, speed, duplex;
pdev = ether->pdev;
if (!mii_link_ok(&ether->mii)) {
ether->linkflag = 0x0;
netif_carrier_off(dev);
dev_warn(&pdev->dev, "%s: Link down.\n", dev->name);
return;
}
if (ether->linkflag == 1)
return;
bmsr = w90p910_mdio_read(dev, ether->mii.phy_id, MII_BMSR);
bmcr = w90p910_mdio_read(dev, ether->mii.phy_id, MII_BMCR);
if (bmcr & BMCR_ANENABLE) {
if (!(bmsr & BMSR_ANEGCOMPLETE))
return;
lpa = w90p910_mdio_read(dev, ether->mii.phy_id, MII_LPA);
if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF))
speed = SPEED_100;
else
speed = SPEED_10;
if ((lpa & LPA_100FULL) || (lpa & LPA_10FULL))
duplex = DUPLEX_FULL;
else
duplex = DUPLEX_HALF;
} else {
speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
}
update_linkspeed_register(dev, speed, duplex);
dev_info(&pdev->dev, "%s: Link now %i-%s\n", dev->name, speed,
(duplex == DUPLEX_FULL) ? "FullDuplex" : "HalfDuplex");
ether->linkflag = 0x01;
netif_carrier_on(dev);
}
static void w90p910_check_link(struct timer_list *t)
{
struct w90p910_ether *ether = from_timer(ether, t, check_timer);
struct net_device *dev = ether->mii.dev;
update_linkspeed(dev);
mod_timer(&ether->check_timer, jiffies + msecs_to_jiffies(1000));
}
static void w90p910_write_cam(struct net_device *dev,
unsigned int x, unsigned char *pval)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int msw, lsw;
msw = (pval[0] << 24) | (pval[1] << 16) | (pval[2] << 8) | pval[3];
lsw = (pval[4] << 24) | (pval[5] << 16);
__raw_writel(lsw, ether->reg + REG_CAML_BASE + x * CAM_ENTRY_SIZE);
__raw_writel(msw, ether->reg + REG_CAMM_BASE + x * CAM_ENTRY_SIZE);
}
static int w90p910_init_desc(struct net_device *dev)
{
struct w90p910_ether *ether;
struct w90p910_txbd *tdesc;
struct w90p910_rxbd *rdesc;
struct platform_device *pdev;
unsigned int i;
ether = netdev_priv(dev);
pdev = ether->pdev;
ether->tdesc = dma_alloc_coherent(&pdev->dev, sizeof(struct tran_pdesc),
&ether->tdesc_phys, GFP_KERNEL);
if (!ether->tdesc)
return -ENOMEM;
ether->rdesc = dma_alloc_coherent(&pdev->dev, sizeof(struct recv_pdesc),
&ether->rdesc_phys, GFP_KERNEL);
if (!ether->rdesc) {
dma_free_coherent(&pdev->dev, sizeof(struct tran_pdesc),
ether->tdesc, ether->tdesc_phys);
return -ENOMEM;
}
for (i = 0; i < TX_DESC_SIZE; i++) {
unsigned int offset;
tdesc = &(ether->tdesc->desclist[i]);
if (i == TX_DESC_SIZE - 1)
offset = offsetof(struct tran_pdesc, desclist[0]);
else
offset = offsetof(struct tran_pdesc, desclist[i + 1]);
tdesc->next = ether->tdesc_phys + offset;
tdesc->buffer = ether->tdesc_phys +
offsetof(struct tran_pdesc, tran_buf[i]);
tdesc->sl = 0;
tdesc->mode = 0;
}
ether->start_tx_ptr = ether->tdesc_phys;
for (i = 0; i < RX_DESC_SIZE; i++) {
unsigned int offset;
rdesc = &(ether->rdesc->desclist[i]);
if (i == RX_DESC_SIZE - 1)
offset = offsetof(struct recv_pdesc, desclist[0]);
else
offset = offsetof(struct recv_pdesc, desclist[i + 1]);
rdesc->next = ether->rdesc_phys + offset;
rdesc->sl = RX_OWEN_DMA;
rdesc->buffer = ether->rdesc_phys +
offsetof(struct recv_pdesc, recv_buf[i]);
}
ether->start_rx_ptr = ether->rdesc_phys;
return 0;
}
static void w90p910_set_fifo_threshold(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = TXTHD | BLENGTH;
__raw_writel(val, ether->reg + REG_FFTCR);
}
static void w90p910_return_default_idle(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = __raw_readl(ether->reg + REG_MCMDR);
val |= SWR;
__raw_writel(val, ether->reg + REG_MCMDR);
}
static void w90p910_trigger_rx(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
__raw_writel(ENSTART, ether->reg + REG_RSDR);
}
static void w90p910_trigger_tx(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
__raw_writel(ENSTART, ether->reg + REG_TSDR);
}
static void w90p910_enable_mac_interrupt(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = ENTXINTR | ENRXINTR | ENRXGD | ENTXCP;
val |= ENTXBERR | ENRXBERR | ENTXABT;
__raw_writel(val, ether->reg + REG_MIEN);
}
static void w90p910_get_and_clear_int(struct net_device *dev,
unsigned int *val)
{
struct w90p910_ether *ether = netdev_priv(dev);
*val = __raw_readl(ether->reg + REG_MISTA);
__raw_writel(*val, ether->reg + REG_MISTA);
}
static void w90p910_set_global_maccmd(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = __raw_readl(ether->reg + REG_MCMDR);
val |= MCMDR_SPCRC | MCMDR_ENMDC | MCMDR_ACP | ENMDC;
__raw_writel(val, ether->reg + REG_MCMDR);
}
static void w90p910_enable_cam(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
w90p910_write_cam(dev, CAM0, dev->dev_addr);
val = __raw_readl(ether->reg + REG_CAMEN);
val |= CAM0EN;
__raw_writel(val, ether->reg + REG_CAMEN);
}
static void w90p910_enable_cam_command(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = CAMCMR_ECMP | CAMCMR_ABP | CAMCMR_AMP;
__raw_writel(val, ether->reg + REG_CAMCMR);
}
static void w90p910_enable_tx(struct net_device *dev, unsigned int enable)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = __raw_readl(ether->reg + REG_MCMDR);
if (enable)
val |= MCMDR_TXON;
else
val &= ~MCMDR_TXON;
__raw_writel(val, ether->reg + REG_MCMDR);
}
static void w90p910_enable_rx(struct net_device *dev, unsigned int enable)
{
struct w90p910_ether *ether = netdev_priv(dev);
unsigned int val;
val = __raw_readl(ether->reg + REG_MCMDR);
if (enable)
val |= MCMDR_RXON;
else
val &= ~MCMDR_RXON;
__raw_writel(val, ether->reg + REG_MCMDR);
}
static void w90p910_set_curdest(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
__raw_writel(ether->start_rx_ptr, ether->reg + REG_RXDLSA);
__raw_writel(ether->start_tx_ptr, ether->reg + REG_TXDLSA);
}
static void w90p910_reset_mac(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
w90p910_enable_tx(dev, 0);
w90p910_enable_rx(dev, 0);
w90p910_set_fifo_threshold(dev);
w90p910_return_default_idle(dev);
if (!netif_queue_stopped(dev))
netif_stop_queue(dev);
w90p910_init_desc(dev);
netif_trans_update(dev); /* prevent tx timeout */
ether->cur_tx = 0x0;
ether->finish_tx = 0x0;
ether->cur_rx = 0x0;
w90p910_set_curdest(dev);
w90p910_enable_cam(dev);
w90p910_enable_cam_command(dev);
w90p910_enable_mac_interrupt(dev);
w90p910_enable_tx(dev, 1);
w90p910_enable_rx(dev, 1);
w90p910_trigger_tx(dev);
w90p910_trigger_rx(dev);
netif_trans_update(dev); /* prevent tx timeout */
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
}
static void w90p910_mdio_write(struct net_device *dev,
int phy_id, int reg, int data)
{
struct w90p910_ether *ether = netdev_priv(dev);
struct platform_device *pdev;
unsigned int val, i;
pdev = ether->pdev;
__raw_writel(data, ether->reg + REG_MIID);
val = (phy_id << 0x08) | reg;
val |= PHYBUSY | PHYWR | MDCCR_VAL;
__raw_writel(val, ether->reg + REG_MIIDA);
for (i = 0; i < DELAY; i++) {
if ((__raw_readl(ether->reg + REG_MIIDA) & PHYBUSY) == 0)
break;
}
if (i == DELAY)
dev_warn(&pdev->dev, "mdio write timed out\n");
}
static int w90p910_mdio_read(struct net_device *dev, int phy_id, int reg)
{
struct w90p910_ether *ether = netdev_priv(dev);
struct platform_device *pdev;
unsigned int val, i, data;
pdev = ether->pdev;
val = (phy_id << 0x08) | reg;
val |= PHYBUSY | MDCCR_VAL;
__raw_writel(val, ether->reg + REG_MIIDA);
for (i = 0; i < DELAY; i++) {
if ((__raw_readl(ether->reg + REG_MIIDA) & PHYBUSY) == 0)
break;
}
if (i == DELAY) {
dev_warn(&pdev->dev, "mdio read timed out\n");
data = 0xffff;
} else {
data = __raw_readl(ether->reg + REG_MIID);
}
return data;
}
static int w90p910_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *address = addr;
if (!is_valid_ether_addr(address->sa_data))
return -EADDRNOTAVAIL;
memcpy(dev->dev_addr, address->sa_data, dev->addr_len);
w90p910_write_cam(dev, CAM0, dev->dev_addr);
return 0;
}
static int w90p910_ether_close(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
struct platform_device *pdev;
pdev = ether->pdev;
dma_free_coherent(&pdev->dev, sizeof(struct recv_pdesc),
ether->rdesc, ether->rdesc_phys);
dma_free_coherent(&pdev->dev, sizeof(struct tran_pdesc),
ether->tdesc, ether->tdesc_phys);
netif_stop_queue(dev);
del_timer_sync(&ether->check_timer);
clk_disable(ether->rmiiclk);
clk_disable(ether->clk);
free_irq(ether->txirq, dev);
free_irq(ether->rxirq, dev);
return 0;
}
static int w90p910_send_frame(struct net_device *dev,
unsigned char *data, int length)
{
struct w90p910_ether *ether;
struct w90p910_txbd *txbd;
struct platform_device *pdev;
unsigned char *buffer;
ether = netdev_priv(dev);
pdev = ether->pdev;
txbd = &ether->tdesc->desclist[ether->cur_tx];
buffer = ether->tdesc->tran_buf[ether->cur_tx];
if (length > 1514) {
dev_err(&pdev->dev, "send data %d bytes, check it\n", length);
length = 1514;
}
txbd->sl = length & 0xFFFF;
memcpy(buffer, data, length);
txbd->mode = TX_OWEN_DMA | PADDINGMODE | CRCMODE | MACTXINTEN;
w90p910_enable_tx(dev, 1);
w90p910_trigger_tx(dev);
if (++ether->cur_tx >= TX_DESC_SIZE)
ether->cur_tx = 0;
txbd = &ether->tdesc->desclist[ether->cur_tx];
if (txbd->mode & TX_OWEN_DMA)
netif_stop_queue(dev);
return 0;
}
static int w90p910_ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
if (!(w90p910_send_frame(dev, skb->data, skb->len))) {
ether->skb = skb;
dev_consume_skb_irq(skb);
return 0;
}
return -EAGAIN;
}
static irqreturn_t w90p910_tx_interrupt(int irq, void *dev_id)
{
struct w90p910_ether *ether;
struct w90p910_txbd *txbd;
struct platform_device *pdev;
struct net_device *dev;
unsigned int cur_entry, entry, status;
dev = dev_id;
ether = netdev_priv(dev);
pdev = ether->pdev;
w90p910_get_and_clear_int(dev, &status);
cur_entry = __raw_readl(ether->reg + REG_CTXDSA);
entry = ether->tdesc_phys +
offsetof(struct tran_pdesc, desclist[ether->finish_tx]);
while (entry != cur_entry) {
txbd = &ether->tdesc->desclist[ether->finish_tx];
if (++ether->finish_tx >= TX_DESC_SIZE)
ether->finish_tx = 0;
if (txbd->sl & TXDS_TXCP) {
dev->stats.tx_packets++;
dev->stats.tx_bytes += txbd->sl & 0xFFFF;
} else {
dev->stats.tx_errors++;
}
txbd->sl = 0x0;
txbd->mode = 0x0;
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
entry = ether->tdesc_phys +
offsetof(struct tran_pdesc, desclist[ether->finish_tx]);
}
if (status & MISTA_EXDEF) {
dev_err(&pdev->dev, "emc defer exceed interrupt\n");
} else if (status & MISTA_TXBERR) {
dev_err(&pdev->dev, "emc bus error interrupt\n");
w90p910_reset_mac(dev);
} else if (status & MISTA_TDU) {
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
}
return IRQ_HANDLED;
}
static void netdev_rx(struct net_device *dev)
{
struct w90p910_ether *ether;
struct w90p910_rxbd *rxbd;
struct platform_device *pdev;
struct sk_buff *skb;
unsigned char *data;
unsigned int length, status, val, entry;
ether = netdev_priv(dev);
pdev = ether->pdev;
rxbd = &ether->rdesc->desclist[ether->cur_rx];
do {
val = __raw_readl(ether->reg + REG_CRXDSA);
entry = ether->rdesc_phys +
offsetof(struct recv_pdesc, desclist[ether->cur_rx]);
if (val == entry)
break;
status = rxbd->sl;
length = status & 0xFFFF;
if (status & RXDS_RXGD) {
data = ether->rdesc->recv_buf[ether->cur_rx];
skb = netdev_alloc_skb(dev, length + 2);
if (!skb) {
dev->stats.rx_dropped++;
return;
}
skb_reserve(skb, 2);
skb_put(skb, length);
skb_copy_to_linear_data(skb, data, length);
skb->protocol = eth_type_trans(skb, dev);
dev->stats.rx_packets++;
dev->stats.rx_bytes += length;
netif_rx(skb);
} else {
dev->stats.rx_errors++;
if (status & RXDS_RP) {
dev_err(&pdev->dev, "rx runt err\n");
dev->stats.rx_length_errors++;
} else if (status & RXDS_CRCE) {
dev_err(&pdev->dev, "rx crc err\n");
dev->stats.rx_crc_errors++;
} else if (status & RXDS_ALIE) {
dev_err(&pdev->dev, "rx alignment err\n");
dev->stats.rx_frame_errors++;
} else if (status & RXDS_PTLE) {
dev_err(&pdev->dev, "rx longer err\n");
dev->stats.rx_over_errors++;
}
}
rxbd->sl = RX_OWEN_DMA;
rxbd->reserved = 0x0;
if (++ether->cur_rx >= RX_DESC_SIZE)
ether->cur_rx = 0;
rxbd = &ether->rdesc->desclist[ether->cur_rx];
} while (1);
}
static irqreturn_t w90p910_rx_interrupt(int irq, void *dev_id)
{
struct net_device *dev;
struct w90p910_ether *ether;
struct platform_device *pdev;
unsigned int status;
dev = dev_id;
ether = netdev_priv(dev);
pdev = ether->pdev;
w90p910_get_and_clear_int(dev, &status);
if (status & MISTA_RDU) {
netdev_rx(dev);
w90p910_trigger_rx(dev);
return IRQ_HANDLED;
} else if (status & MISTA_RXBERR) {
dev_err(&pdev->dev, "emc rx bus error\n");
w90p910_reset_mac(dev);
}
netdev_rx(dev);
return IRQ_HANDLED;
}
static int w90p910_ether_open(struct net_device *dev)
{
struct w90p910_ether *ether;
struct platform_device *pdev;
ether = netdev_priv(dev);
pdev = ether->pdev;
w90p910_reset_mac(dev);
w90p910_set_fifo_threshold(dev);
w90p910_set_curdest(dev);
w90p910_enable_cam(dev);
w90p910_enable_cam_command(dev);
w90p910_enable_mac_interrupt(dev);
w90p910_set_global_maccmd(dev);
w90p910_enable_rx(dev, 1);
clk_enable(ether->rmiiclk);
clk_enable(ether->clk);
ether->rx_packets = 0x0;
ether->rx_bytes = 0x0;
if (request_irq(ether->txirq, w90p910_tx_interrupt,
0x0, pdev->name, dev)) {
dev_err(&pdev->dev, "register irq tx failed\n");
return -EAGAIN;
}
if (request_irq(ether->rxirq, w90p910_rx_interrupt,
0x0, pdev->name, dev)) {
dev_err(&pdev->dev, "register irq rx failed\n");
free_irq(ether->txirq, dev);
return -EAGAIN;
}
mod_timer(&ether->check_timer, jiffies + msecs_to_jiffies(1000));
netif_start_queue(dev);
w90p910_trigger_rx(dev);
dev_info(&pdev->dev, "%s is OPENED\n", dev->name);
return 0;
}
static void w90p910_ether_set_multicast_list(struct net_device *dev)
{
struct w90p910_ether *ether;
unsigned int rx_mode;
ether = netdev_priv(dev);
if (dev->flags & IFF_PROMISC)
rx_mode = CAMCMR_AUP | CAMCMR_AMP | CAMCMR_ABP | CAMCMR_ECMP;
else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
rx_mode = CAMCMR_AMP | CAMCMR_ABP | CAMCMR_ECMP;
else
rx_mode = CAMCMR_ECMP | CAMCMR_ABP;
__raw_writel(rx_mode, ether->reg + REG_CAMCMR);
}
static int w90p910_ether_ioctl(struct net_device *dev,
struct ifreq *ifr, int cmd)
{
struct w90p910_ether *ether = netdev_priv(dev);
struct mii_ioctl_data *data = if_mii(ifr);
return generic_mii_ioctl(&ether->mii, data, cmd, NULL);
}
static void w90p910_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
}
static int w90p910_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct w90p910_ether *ether = netdev_priv(dev);
mii_ethtool_get_link_ksettings(&ether->mii, cmd);
return 0;
}
static int w90p910_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct w90p910_ether *ether = netdev_priv(dev);
return mii_ethtool_set_link_ksettings(&ether->mii, cmd);
}
static int w90p910_nway_reset(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
return mii_nway_restart(&ether->mii);
}
static u32 w90p910_get_link(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
return mii_link_ok(&ether->mii);
}
static const struct ethtool_ops w90p910_ether_ethtool_ops = {
.get_drvinfo = w90p910_get_drvinfo,
.nway_reset = w90p910_nway_reset,
.get_link = w90p910_get_link,
.get_link_ksettings = w90p910_get_link_ksettings,
.set_link_ksettings = w90p910_set_link_ksettings,
};
static const struct net_device_ops w90p910_ether_netdev_ops = {
.ndo_open = w90p910_ether_open,
.ndo_stop = w90p910_ether_close,
.ndo_start_xmit = w90p910_ether_start_xmit,
.ndo_set_rx_mode = w90p910_ether_set_multicast_list,
.ndo_set_mac_address = w90p910_set_mac_address,
.ndo_do_ioctl = w90p910_ether_ioctl,
.ndo_validate_addr = eth_validate_addr,
};
static void get_mac_address(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
struct platform_device *pdev;
char addr[ETH_ALEN];
pdev = ether->pdev;
addr[0] = 0x00;
addr[1] = 0x02;
addr[2] = 0xac;
addr[3] = 0x55;
addr[4] = 0x88;
addr[5] = 0xa8;
if (is_valid_ether_addr(addr))
memcpy(dev->dev_addr, &addr, ETH_ALEN);
else
dev_err(&pdev->dev, "invalid mac address\n");
}
static int w90p910_ether_setup(struct net_device *dev)
{
struct w90p910_ether *ether = netdev_priv(dev);
dev->netdev_ops = &w90p910_ether_netdev_ops;
dev->ethtool_ops = &w90p910_ether_ethtool_ops;
dev->tx_queue_len = 16;
dev->dma = 0x0;
dev->watchdog_timeo = TX_TIMEOUT;
get_mac_address(dev);
ether->cur_tx = 0x0;
ether->cur_rx = 0x0;
ether->finish_tx = 0x0;
ether->linkflag = 0x0;
ether->mii.phy_id = 0x01;
ether->mii.phy_id_mask = 0x1f;
ether->mii.reg_num_mask = 0x1f;
ether->mii.dev = dev;
ether->mii.mdio_read = w90p910_mdio_read;
ether->mii.mdio_write = w90p910_mdio_write;
timer_setup(&ether->check_timer, w90p910_check_link, 0);
return 0;
}
static int w90p910_ether_probe(struct platform_device *pdev)
{
struct w90p910_ether *ether;
struct net_device *dev;
int error;
dev = alloc_etherdev(sizeof(struct w90p910_ether));
if (!dev)
return -ENOMEM;
ether = netdev_priv(dev);
ether->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (ether->res == NULL) {
dev_err(&pdev->dev, "failed to get I/O memory\n");
error = -ENXIO;
goto failed_free;
}
if (!request_mem_region(ether->res->start,
resource_size(ether->res), pdev->name)) {
dev_err(&pdev->dev, "failed to request I/O memory\n");
error = -EBUSY;
goto failed_free;
}
ether->reg = ioremap(ether->res->start, resource_size(ether->res));
if (ether->reg == NULL) {
dev_err(&pdev->dev, "failed to remap I/O memory\n");
error = -ENXIO;
goto failed_free_mem;
}
ether->txirq = platform_get_irq(pdev, 0);
if (ether->txirq < 0) {
error = -ENXIO;
goto failed_free_io;
}
ether->rxirq = platform_get_irq(pdev, 1);
if (ether->rxirq < 0) {
error = -ENXIO;
goto failed_free_io;
}
platform_set_drvdata(pdev, dev);
ether->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(ether->clk)) {
dev_err(&pdev->dev, "failed to get ether clock\n");
error = PTR_ERR(ether->clk);
goto failed_free_io;
}
ether->rmiiclk = clk_get(&pdev->dev, "RMII");
if (IS_ERR(ether->rmiiclk)) {
dev_err(&pdev->dev, "failed to get ether clock\n");
error = PTR_ERR(ether->rmiiclk);
goto failed_put_clk;
}
ether->pdev = pdev;
w90p910_ether_setup(dev);
error = register_netdev(dev);
if (error != 0) {
dev_err(&pdev->dev, "Register EMC w90p910 FAILED\n");
error = -ENODEV;
goto failed_put_rmiiclk;
}
return 0;
failed_put_rmiiclk:
clk_put(ether->rmiiclk);
failed_put_clk:
clk_put(ether->clk);
failed_free_io:
iounmap(ether->reg);
failed_free_mem:
release_mem_region(ether->res->start, resource_size(ether->res));
failed_free:
free_netdev(dev);
return error;
}
static int w90p910_ether_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
struct w90p910_ether *ether = netdev_priv(dev);
unregister_netdev(dev);
clk_put(ether->rmiiclk);
clk_put(ether->clk);
iounmap(ether->reg);
release_mem_region(ether->res->start, resource_size(ether->res));
del_timer_sync(&ether->check_timer);
free_netdev(dev);
return 0;
}
static struct platform_driver w90p910_ether_driver = {
.probe = w90p910_ether_probe,
.remove = w90p910_ether_remove,
.driver = {
.name = "nuc900-emc",
},
};
module_platform_driver(w90p910_ether_driver);
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("w90p910 MAC driver!");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:nuc900-emc");
Reference in New Issue View Git Blame Copy Permalink