mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
ddb1417529
To fix the bug of checking on signed return value using unsigned statement. Thanks Roel Kluin for digging out it. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1122 lines
26 KiB
C
1122 lines
26 KiB
C
/*
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* Copyright (c) 2008-2009 Nuvoton technology corporation.
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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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 as published by
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* the Free Software Foundation;version 2 of the License.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/mii.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/ethtool.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#define DRV_MODULE_NAME "w90p910-emc"
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#define DRV_MODULE_VERSION "0.1"
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/* Ethernet MAC Registers */
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#define REG_CAMCMR 0x00
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#define REG_CAMEN 0x04
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#define REG_CAMM_BASE 0x08
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#define REG_CAML_BASE 0x0c
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#define REG_TXDLSA 0x88
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#define REG_RXDLSA 0x8C
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#define REG_MCMDR 0x90
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#define REG_MIID 0x94
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#define REG_MIIDA 0x98
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#define REG_FFTCR 0x9C
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#define REG_TSDR 0xa0
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#define REG_RSDR 0xa4
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#define REG_DMARFC 0xa8
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#define REG_MIEN 0xac
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#define REG_MISTA 0xb0
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#define REG_CTXDSA 0xcc
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#define REG_CTXBSA 0xd0
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#define REG_CRXDSA 0xd4
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#define REG_CRXBSA 0xd8
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/* mac controller bit */
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#define MCMDR_RXON 0x01
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#define MCMDR_ACP (0x01 << 3)
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#define MCMDR_SPCRC (0x01 << 5)
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#define MCMDR_TXON (0x01 << 8)
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#define MCMDR_FDUP (0x01 << 18)
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#define MCMDR_ENMDC (0x01 << 19)
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#define MCMDR_OPMOD (0x01 << 20)
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#define SWR (0x01 << 24)
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/* cam command regiser */
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#define CAMCMR_AUP 0x01
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#define CAMCMR_AMP (0x01 << 1)
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#define CAMCMR_ABP (0x01 << 2)
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#define CAMCMR_CCAM (0x01 << 3)
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#define CAMCMR_ECMP (0x01 << 4)
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#define CAM0EN 0x01
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/* mac mii controller bit */
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#define MDCCR (0x0a << 20)
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#define PHYAD (0x01 << 8)
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#define PHYWR (0x01 << 16)
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#define PHYBUSY (0x01 << 17)
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#define PHYPRESP (0x01 << 18)
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#define CAM_ENTRY_SIZE 0x08
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/* rx and tx status */
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#define TXDS_TXCP (0x01 << 19)
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#define RXDS_CRCE (0x01 << 17)
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#define RXDS_PTLE (0x01 << 19)
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#define RXDS_RXGD (0x01 << 20)
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#define RXDS_ALIE (0x01 << 21)
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#define RXDS_RP (0x01 << 22)
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/* mac interrupt status*/
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#define MISTA_EXDEF (0x01 << 19)
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#define MISTA_TXBERR (0x01 << 24)
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#define MISTA_TDU (0x01 << 23)
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#define MISTA_RDU (0x01 << 10)
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#define MISTA_RXBERR (0x01 << 11)
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#define ENSTART 0x01
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#define ENRXINTR 0x01
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#define ENRXGD (0x01 << 4)
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#define ENRXBERR (0x01 << 11)
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#define ENTXINTR (0x01 << 16)
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#define ENTXCP (0x01 << 18)
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#define ENTXABT (0x01 << 21)
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#define ENTXBERR (0x01 << 24)
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#define ENMDC (0x01 << 19)
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#define PHYBUSY (0x01 << 17)
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#define MDCCR_VAL 0xa00000
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/* rx and tx owner bit */
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#define RX_OWEN_DMA (0x01 << 31)
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#define RX_OWEN_CPU (~(0x03 << 30))
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#define TX_OWEN_DMA (0x01 << 31)
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#define TX_OWEN_CPU (~(0x01 << 31))
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/* tx frame desc controller bit */
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#define MACTXINTEN 0x04
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#define CRCMODE 0x02
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#define PADDINGMODE 0x01
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/* fftcr controller bit */
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#define TXTHD (0x03 << 8)
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#define BLENGTH (0x01 << 20)
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/* global setting for driver */
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#define RX_DESC_SIZE 50
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#define TX_DESC_SIZE 10
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#define MAX_RBUFF_SZ 0x600
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#define MAX_TBUFF_SZ 0x600
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#define TX_TIMEOUT 50
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#define DELAY 1000
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#define CAM0 0x0
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static int w90p910_mdio_read(struct net_device *dev, int phy_id, int reg);
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struct w90p910_rxbd {
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unsigned int sl;
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unsigned int buffer;
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unsigned int reserved;
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unsigned int next;
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};
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struct w90p910_txbd {
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unsigned int mode;
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unsigned int buffer;
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unsigned int sl;
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unsigned int next;
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};
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struct recv_pdesc {
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struct w90p910_rxbd desclist[RX_DESC_SIZE];
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char recv_buf[RX_DESC_SIZE][MAX_RBUFF_SZ];
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};
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struct tran_pdesc {
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struct w90p910_txbd desclist[TX_DESC_SIZE];
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char tran_buf[TX_DESC_SIZE][MAX_TBUFF_SZ];
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};
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struct w90p910_ether {
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struct recv_pdesc *rdesc;
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struct tran_pdesc *tdesc;
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dma_addr_t rdesc_phys;
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dma_addr_t tdesc_phys;
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struct net_device_stats stats;
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struct platform_device *pdev;
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struct resource *res;
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struct sk_buff *skb;
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struct clk *clk;
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struct clk *rmiiclk;
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struct mii_if_info mii;
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struct timer_list check_timer;
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void __iomem *reg;
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int rxirq;
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int txirq;
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unsigned int cur_tx;
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unsigned int cur_rx;
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unsigned int finish_tx;
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unsigned int rx_packets;
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unsigned int rx_bytes;
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unsigned int start_tx_ptr;
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unsigned int start_rx_ptr;
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unsigned int linkflag;
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};
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static void update_linkspeed_register(struct net_device *dev,
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unsigned int speed, unsigned int duplex)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = __raw_readl(ether->reg + REG_MCMDR);
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if (speed == SPEED_100) {
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/* 100 full/half duplex */
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if (duplex == DUPLEX_FULL) {
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val |= (MCMDR_OPMOD | MCMDR_FDUP);
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} else {
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val |= MCMDR_OPMOD;
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val &= ~MCMDR_FDUP;
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}
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} else {
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/* 10 full/half duplex */
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if (duplex == DUPLEX_FULL) {
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val |= MCMDR_FDUP;
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val &= ~MCMDR_OPMOD;
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} else {
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val &= ~(MCMDR_FDUP | MCMDR_OPMOD);
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}
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}
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__raw_writel(val, ether->reg + REG_MCMDR);
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}
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static void update_linkspeed(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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struct platform_device *pdev;
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unsigned int bmsr, bmcr, lpa, speed, duplex;
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pdev = ether->pdev;
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if (!mii_link_ok(ðer->mii)) {
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ether->linkflag = 0x0;
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netif_carrier_off(dev);
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dev_warn(&pdev->dev, "%s: Link down.\n", dev->name);
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return;
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}
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if (ether->linkflag == 1)
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return;
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bmsr = w90p910_mdio_read(dev, ether->mii.phy_id, MII_BMSR);
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bmcr = w90p910_mdio_read(dev, ether->mii.phy_id, MII_BMCR);
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if (bmcr & BMCR_ANENABLE) {
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if (!(bmsr & BMSR_ANEGCOMPLETE))
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return;
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lpa = w90p910_mdio_read(dev, ether->mii.phy_id, MII_LPA);
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if ((lpa & LPA_100FULL) || (lpa & LPA_100HALF))
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speed = SPEED_100;
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else
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speed = SPEED_10;
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if ((lpa & LPA_100FULL) || (lpa & LPA_10FULL))
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duplex = DUPLEX_FULL;
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else
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duplex = DUPLEX_HALF;
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} else {
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speed = (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
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duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
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}
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update_linkspeed_register(dev, speed, duplex);
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dev_info(&pdev->dev, "%s: Link now %i-%s\n", dev->name, speed,
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(duplex == DUPLEX_FULL) ? "FullDuplex" : "HalfDuplex");
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ether->linkflag = 0x01;
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netif_carrier_on(dev);
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}
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static void w90p910_check_link(unsigned long dev_id)
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{
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struct net_device *dev = (struct net_device *) dev_id;
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struct w90p910_ether *ether = netdev_priv(dev);
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update_linkspeed(dev);
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mod_timer(ðer->check_timer, jiffies + msecs_to_jiffies(1000));
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}
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static void w90p910_write_cam(struct net_device *dev,
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unsigned int x, unsigned char *pval)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int msw, lsw;
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msw = (pval[0] << 24) | (pval[1] << 16) | (pval[2] << 8) | pval[3];
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lsw = (pval[4] << 24) | (pval[5] << 16);
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__raw_writel(lsw, ether->reg + REG_CAML_BASE + x * CAM_ENTRY_SIZE);
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__raw_writel(msw, ether->reg + REG_CAMM_BASE + x * CAM_ENTRY_SIZE);
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}
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static int w90p910_init_desc(struct net_device *dev)
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{
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struct w90p910_ether *ether;
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struct w90p910_txbd *tdesc;
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struct w90p910_rxbd *rdesc;
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struct platform_device *pdev;
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unsigned int i;
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ether = netdev_priv(dev);
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pdev = ether->pdev;
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ether->tdesc = (struct tran_pdesc *)
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dma_alloc_coherent(&pdev->dev, sizeof(struct tran_pdesc),
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ðer->tdesc_phys, GFP_KERNEL);
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if (!ether->tdesc) {
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dev_err(&pdev->dev, "Failed to allocate memory for tx desc\n");
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return -ENOMEM;
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}
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ether->rdesc = (struct recv_pdesc *)
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dma_alloc_coherent(&pdev->dev, sizeof(struct recv_pdesc),
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ðer->rdesc_phys, GFP_KERNEL);
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if (!ether->rdesc) {
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dev_err(&pdev->dev, "Failed to allocate memory for rx desc\n");
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dma_free_coherent(&pdev->dev, sizeof(struct tran_pdesc),
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ether->tdesc, ether->tdesc_phys);
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return -ENOMEM;
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}
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for (i = 0; i < TX_DESC_SIZE; i++) {
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unsigned int offset;
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tdesc = &(ether->tdesc->desclist[i]);
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if (i == TX_DESC_SIZE - 1)
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offset = offsetof(struct tran_pdesc, desclist[0]);
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else
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offset = offsetof(struct tran_pdesc, desclist[i + 1]);
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tdesc->next = ether->tdesc_phys + offset;
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tdesc->buffer = ether->tdesc_phys +
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offsetof(struct tran_pdesc, tran_buf[i]);
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tdesc->sl = 0;
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tdesc->mode = 0;
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}
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ether->start_tx_ptr = ether->tdesc_phys;
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for (i = 0; i < RX_DESC_SIZE; i++) {
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unsigned int offset;
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rdesc = &(ether->rdesc->desclist[i]);
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if (i == RX_DESC_SIZE - 1)
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offset = offsetof(struct recv_pdesc, desclist[0]);
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else
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offset = offsetof(struct recv_pdesc, desclist[i + 1]);
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rdesc->next = ether->rdesc_phys + offset;
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rdesc->sl = RX_OWEN_DMA;
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rdesc->buffer = ether->rdesc_phys +
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offsetof(struct recv_pdesc, recv_buf[i]);
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}
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ether->start_rx_ptr = ether->rdesc_phys;
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return 0;
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}
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static void w90p910_set_fifo_threshold(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = TXTHD | BLENGTH;
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__raw_writel(val, ether->reg + REG_FFTCR);
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}
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static void w90p910_return_default_idle(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = __raw_readl(ether->reg + REG_MCMDR);
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val |= SWR;
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__raw_writel(val, ether->reg + REG_MCMDR);
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}
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static void w90p910_trigger_rx(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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__raw_writel(ENSTART, ether->reg + REG_RSDR);
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}
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static void w90p910_trigger_tx(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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__raw_writel(ENSTART, ether->reg + REG_TSDR);
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}
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static void w90p910_enable_mac_interrupt(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = ENTXINTR | ENRXINTR | ENRXGD | ENTXCP;
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val |= ENTXBERR | ENRXBERR | ENTXABT;
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__raw_writel(val, ether->reg + REG_MIEN);
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}
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static void w90p910_get_and_clear_int(struct net_device *dev,
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unsigned int *val)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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*val = __raw_readl(ether->reg + REG_MISTA);
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__raw_writel(*val, ether->reg + REG_MISTA);
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}
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static void w90p910_set_global_maccmd(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = __raw_readl(ether->reg + REG_MCMDR);
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val |= MCMDR_SPCRC | MCMDR_ENMDC | MCMDR_ACP | ENMDC;
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__raw_writel(val, ether->reg + REG_MCMDR);
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}
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static void w90p910_enable_cam(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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w90p910_write_cam(dev, CAM0, dev->dev_addr);
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val = __raw_readl(ether->reg + REG_CAMEN);
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val |= CAM0EN;
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__raw_writel(val, ether->reg + REG_CAMEN);
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}
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static void w90p910_enable_cam_command(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = CAMCMR_ECMP | CAMCMR_ABP | CAMCMR_AMP;
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__raw_writel(val, ether->reg + REG_CAMCMR);
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}
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static void w90p910_enable_tx(struct net_device *dev, unsigned int enable)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = __raw_readl(ether->reg + REG_MCMDR);
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if (enable)
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val |= MCMDR_TXON;
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else
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val &= ~MCMDR_TXON;
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__raw_writel(val, ether->reg + REG_MCMDR);
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}
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static void w90p910_enable_rx(struct net_device *dev, unsigned int enable)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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unsigned int val;
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val = __raw_readl(ether->reg + REG_MCMDR);
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if (enable)
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val |= MCMDR_RXON;
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else
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val &= ~MCMDR_RXON;
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__raw_writel(val, ether->reg + REG_MCMDR);
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}
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static void w90p910_set_curdest(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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__raw_writel(ether->start_rx_ptr, ether->reg + REG_RXDLSA);
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__raw_writel(ether->start_tx_ptr, ether->reg + REG_TXDLSA);
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}
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static void w90p910_reset_mac(struct net_device *dev)
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{
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struct w90p910_ether *ether = netdev_priv(dev);
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w90p910_enable_tx(dev, 0);
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w90p910_enable_rx(dev, 0);
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w90p910_set_fifo_threshold(dev);
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w90p910_return_default_idle(dev);
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if (!netif_queue_stopped(dev))
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netif_stop_queue(dev);
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w90p910_init_desc(dev);
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dev->trans_start = jiffies;
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ether->cur_tx = 0x0;
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ether->finish_tx = 0x0;
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ether->cur_rx = 0x0;
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w90p910_set_curdest(dev);
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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);
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
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(ðer->check_timer);
|
|
clk_disable(ether->rmiiclk);
|
|
clk_disable(ether->clk);
|
|
|
|
free_irq(ether->txirq, dev);
|
|
free_irq(ether->rxirq, dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *w90p910_ether_stats(struct net_device *dev)
|
|
{
|
|
struct w90p910_ether *ether;
|
|
|
|
ether = netdev_priv(dev);
|
|
|
|
return ðer->stats;
|
|
}
|
|
|
|
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 = ðer->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 = ðer->tdesc->desclist[ether->cur_tx];
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
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_kfree_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 = ðer->tdesc->desclist[ether->finish_tx];
|
|
|
|
if (++ether->finish_tx >= TX_DESC_SIZE)
|
|
ether->finish_tx = 0;
|
|
|
|
if (txbd->sl & TXDS_TXCP) {
|
|
ether->stats.tx_packets++;
|
|
ether->stats.tx_bytes += txbd->sl & 0xFFFF;
|
|
} else {
|
|
ether->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 = ðer->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 = dev_alloc_skb(length+2);
|
|
if (!skb) {
|
|
dev_err(&pdev->dev, "get skb buffer error\n");
|
|
ether->stats.rx_dropped++;
|
|
return;
|
|
}
|
|
|
|
skb->dev = dev;
|
|
skb_reserve(skb, 2);
|
|
skb_put(skb, length);
|
|
skb_copy_to_linear_data(skb, data, length);
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
ether->stats.rx_packets++;
|
|
ether->stats.rx_bytes += length;
|
|
netif_rx(skb);
|
|
} else {
|
|
ether->stats.rx_errors++;
|
|
|
|
if (status & RXDS_RP) {
|
|
dev_err(&pdev->dev, "rx runt err\n");
|
|
ether->stats.rx_length_errors++;
|
|
} else if (status & RXDS_CRCE) {
|
|
dev_err(&pdev->dev, "rx crc err\n");
|
|
ether->stats.rx_crc_errors++;
|
|
} else if (status & RXDS_ALIE) {
|
|
dev_err(&pdev->dev, "rx aligment err\n");
|
|
ether->stats.rx_frame_errors++;
|
|
} else if (status & RXDS_PTLE) {
|
|
dev_err(&pdev->dev, "rx longer err\n");
|
|
ether->stats.rx_over_errors++;
|
|
}
|
|
}
|
|
|
|
rxbd->sl = RX_OWEN_DMA;
|
|
rxbd->reserved = 0x0;
|
|
|
|
if (++ether->cur_rx >= RX_DESC_SIZE)
|
|
ether->cur_rx = 0;
|
|
|
|
rxbd = ðer->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);
|
|
|
|
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(ðer->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) || dev->mc_list)
|
|
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(ðer->mii, data, cmd, NULL);
|
|
}
|
|
|
|
static void w90p910_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strcpy(info->driver, DRV_MODULE_NAME);
|
|
strcpy(info->version, DRV_MODULE_VERSION);
|
|
}
|
|
|
|
static int w90p910_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
{
|
|
struct w90p910_ether *ether = netdev_priv(dev);
|
|
return mii_ethtool_gset(ðer->mii, cmd);
|
|
}
|
|
|
|
static int w90p910_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
{
|
|
struct w90p910_ether *ether = netdev_priv(dev);
|
|
return mii_ethtool_sset(ðer->mii, cmd);
|
|
}
|
|
|
|
static int w90p910_nway_reset(struct net_device *dev)
|
|
{
|
|
struct w90p910_ether *ether = netdev_priv(dev);
|
|
return mii_nway_restart(ðer->mii);
|
|
}
|
|
|
|
static u32 w90p910_get_link(struct net_device *dev)
|
|
{
|
|
struct w90p910_ether *ether = netdev_priv(dev);
|
|
return mii_link_ok(ðer->mii);
|
|
}
|
|
|
|
static const struct ethtool_ops w90p910_ether_ethtool_ops = {
|
|
.get_settings = w90p910_get_settings,
|
|
.set_settings = w90p910_set_settings,
|
|
.get_drvinfo = w90p910_get_drvinfo,
|
|
.nway_reset = w90p910_nway_reset,
|
|
.get_link = w90p910_get_link,
|
|
};
|
|
|
|
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_get_stats = w90p910_ether_stats,
|
|
.ndo_set_multicast_list = 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,
|
|
.ndo_change_mtu = eth_change_mtu,
|
|
};
|
|
|
|
static void __init get_mac_address(struct net_device *dev)
|
|
{
|
|
struct w90p910_ether *ether = netdev_priv(dev);
|
|
struct platform_device *pdev;
|
|
char addr[6];
|
|
|
|
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, 0x06);
|
|
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);
|
|
|
|
ether_setup(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;
|
|
|
|
setup_timer(ðer->check_timer, w90p910_check_link,
|
|
(unsigned long)dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit 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) {
|
|
dev_err(&pdev->dev, "failed to get ether tx irq\n");
|
|
error = -ENXIO;
|
|
goto failed_free_io;
|
|
}
|
|
|
|
ether->rxirq = platform_get_irq(pdev, 1);
|
|
if (ether->rxirq < 0) {
|
|
dev_err(&pdev->dev, "failed to get ether rx irq\n");
|
|
error = -ENXIO;
|
|
goto failed_free_txirq;
|
|
}
|
|
|
|
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_rxirq;
|
|
}
|
|
|
|
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, "Regiter 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_rxirq:
|
|
free_irq(ether->rxirq, pdev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
failed_free_txirq:
|
|
free_irq(ether->txirq, pdev);
|
|
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 __devexit 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));
|
|
|
|
free_irq(ether->txirq, dev);
|
|
free_irq(ether->rxirq, dev);
|
|
|
|
del_timer_sync(ðer->check_timer);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
free_netdev(dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver w90p910_ether_driver = {
|
|
.probe = w90p910_ether_probe,
|
|
.remove = __devexit_p(w90p910_ether_remove),
|
|
.driver = {
|
|
.name = "nuc900-emc",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init w90p910_ether_init(void)
|
|
{
|
|
return platform_driver_register(&w90p910_ether_driver);
|
|
}
|
|
|
|
static void __exit w90p910_ether_exit(void)
|
|
{
|
|
platform_driver_unregister(&w90p910_ether_driver);
|
|
}
|
|
|
|
module_init(w90p910_ether_init);
|
|
module_exit(w90p910_ether_exit);
|
|
|
|
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
|
|
MODULE_DESCRIPTION("w90p910 MAC driver!");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:nuc900-emc");
|
|
|