mirror of https://gitee.com/openkylin/linux.git
1264 lines
32 KiB
C
1264 lines
32 KiB
C
/*
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* Intel IXP4xx Ethernet driver for Linux
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*
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* Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*
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* Ethernet port config (0x00 is not present on IXP42X):
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*
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* logical port 0x00 0x10 0x20
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* NPE 0 (NPE-A) 1 (NPE-B) 2 (NPE-C)
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* physical PortId 2 0 1
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* TX queue 23 24 25
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* RX-free queue 26 27 28
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* TX-done queue is always 31, per-port RX and TX-ready queues are configurable
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*
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*
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* Queue entries:
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* bits 0 -> 1 - NPE ID (RX and TX-done)
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* bits 0 -> 2 - priority (TX, per 802.1D)
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* bits 3 -> 4 - port ID (user-set?)
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* bits 5 -> 31 - physical descriptor address
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*/
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmapool.h>
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#include <linux/etherdevice.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/mii.h>
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#include <linux/platform_device.h>
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#include <mach/npe.h>
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#include <mach/qmgr.h>
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#define DEBUG_QUEUES 0
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#define DEBUG_DESC 0
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#define DEBUG_RX 0
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#define DEBUG_TX 0
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#define DEBUG_PKT_BYTES 0
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#define DEBUG_MDIO 0
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#define DEBUG_CLOSE 0
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#define DRV_NAME "ixp4xx_eth"
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#define MAX_NPES 3
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#define RX_DESCS 64 /* also length of all RX queues */
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#define TX_DESCS 16 /* also length of all TX queues */
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#define TXDONE_QUEUE_LEN 64 /* dwords */
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#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
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#define REGS_SIZE 0x1000
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#define MAX_MRU 1536 /* 0x600 */
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#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
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#define NAPI_WEIGHT 16
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#define MDIO_INTERVAL (3 * HZ)
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#define MAX_MDIO_RETRIES 100 /* microseconds, typically 30 cycles */
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#define MAX_MII_RESET_RETRIES 100 /* mdio_read() cycles, typically 4 */
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#define MAX_CLOSE_WAIT 1000 /* microseconds, typically 2-3 cycles */
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#define NPE_ID(port_id) ((port_id) >> 4)
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#define PHYSICAL_ID(port_id) ((NPE_ID(port_id) + 2) % 3)
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#define TX_QUEUE(port_id) (NPE_ID(port_id) + 23)
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#define RXFREE_QUEUE(port_id) (NPE_ID(port_id) + 26)
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#define TXDONE_QUEUE 31
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/* TX Control Registers */
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#define TX_CNTRL0_TX_EN 0x01
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#define TX_CNTRL0_HALFDUPLEX 0x02
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#define TX_CNTRL0_RETRY 0x04
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#define TX_CNTRL0_PAD_EN 0x08
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#define TX_CNTRL0_APPEND_FCS 0x10
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#define TX_CNTRL0_2DEFER 0x20
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#define TX_CNTRL0_RMII 0x40 /* reduced MII */
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#define TX_CNTRL1_RETRIES 0x0F /* 4 bits */
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/* RX Control Registers */
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#define RX_CNTRL0_RX_EN 0x01
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#define RX_CNTRL0_PADSTRIP_EN 0x02
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#define RX_CNTRL0_SEND_FCS 0x04
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#define RX_CNTRL0_PAUSE_EN 0x08
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#define RX_CNTRL0_LOOP_EN 0x10
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#define RX_CNTRL0_ADDR_FLTR_EN 0x20
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#define RX_CNTRL0_RX_RUNT_EN 0x40
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#define RX_CNTRL0_BCAST_DIS 0x80
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#define RX_CNTRL1_DEFER_EN 0x01
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/* Core Control Register */
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#define CORE_RESET 0x01
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#define CORE_RX_FIFO_FLUSH 0x02
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#define CORE_TX_FIFO_FLUSH 0x04
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#define CORE_SEND_JAM 0x08
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#define CORE_MDC_EN 0x10 /* MDIO using NPE-B ETH-0 only */
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#define DEFAULT_TX_CNTRL0 (TX_CNTRL0_TX_EN | TX_CNTRL0_RETRY | \
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TX_CNTRL0_PAD_EN | TX_CNTRL0_APPEND_FCS | \
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TX_CNTRL0_2DEFER)
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#define DEFAULT_RX_CNTRL0 RX_CNTRL0_RX_EN
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#define DEFAULT_CORE_CNTRL CORE_MDC_EN
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/* NPE message codes */
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#define NPE_GETSTATUS 0x00
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#define NPE_EDB_SETPORTADDRESS 0x01
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#define NPE_EDB_GETMACADDRESSDATABASE 0x02
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#define NPE_EDB_SETMACADDRESSSDATABASE 0x03
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#define NPE_GETSTATS 0x04
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#define NPE_RESETSTATS 0x05
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#define NPE_SETMAXFRAMELENGTHS 0x06
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#define NPE_VLAN_SETRXTAGMODE 0x07
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#define NPE_VLAN_SETDEFAULTRXVID 0x08
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#define NPE_VLAN_SETPORTVLANTABLEENTRY 0x09
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#define NPE_VLAN_SETPORTVLANTABLERANGE 0x0A
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#define NPE_VLAN_SETRXQOSENTRY 0x0B
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#define NPE_VLAN_SETPORTIDEXTRACTIONMODE 0x0C
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#define NPE_STP_SETBLOCKINGSTATE 0x0D
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#define NPE_FW_SETFIREWALLMODE 0x0E
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#define NPE_PC_SETFRAMECONTROLDURATIONID 0x0F
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#define NPE_PC_SETAPMACTABLE 0x11
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#define NPE_SETLOOPBACK_MODE 0x12
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#define NPE_PC_SETBSSIDTABLE 0x13
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#define NPE_ADDRESS_FILTER_CONFIG 0x14
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#define NPE_APPENDFCSCONFIG 0x15
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#define NPE_NOTIFY_MAC_RECOVERY_DONE 0x16
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#define NPE_MAC_RECOVERY_START 0x17
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#ifdef __ARMEB__
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typedef struct sk_buff buffer_t;
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#define free_buffer dev_kfree_skb
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#define free_buffer_irq dev_kfree_skb_irq
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#else
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typedef void buffer_t;
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#define free_buffer kfree
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#define free_buffer_irq kfree
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#endif
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struct eth_regs {
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u32 tx_control[2], __res1[2]; /* 000 */
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u32 rx_control[2], __res2[2]; /* 010 */
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u32 random_seed, __res3[3]; /* 020 */
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u32 partial_empty_threshold, __res4; /* 030 */
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u32 partial_full_threshold, __res5; /* 038 */
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u32 tx_start_bytes, __res6[3]; /* 040 */
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u32 tx_deferral, rx_deferral, __res7[2];/* 050 */
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u32 tx_2part_deferral[2], __res8[2]; /* 060 */
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u32 slot_time, __res9[3]; /* 070 */
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u32 mdio_command[4]; /* 080 */
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u32 mdio_status[4]; /* 090 */
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u32 mcast_mask[6], __res10[2]; /* 0A0 */
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u32 mcast_addr[6], __res11[2]; /* 0C0 */
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u32 int_clock_threshold, __res12[3]; /* 0E0 */
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u32 hw_addr[6], __res13[61]; /* 0F0 */
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u32 core_control; /* 1FC */
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};
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struct port {
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struct resource *mem_res;
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struct eth_regs __iomem *regs;
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struct npe *npe;
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struct net_device *netdev;
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struct napi_struct napi;
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struct net_device_stats stat;
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struct mii_if_info mii;
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struct delayed_work mdio_thread;
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struct eth_plat_info *plat;
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buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
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struct desc *desc_tab; /* coherent */
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u32 desc_tab_phys;
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int id; /* logical port ID */
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u16 mii_bmcr;
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};
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/* NPE message structure */
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struct msg {
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#ifdef __ARMEB__
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u8 cmd, eth_id, byte2, byte3;
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u8 byte4, byte5, byte6, byte7;
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#else
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u8 byte3, byte2, eth_id, cmd;
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u8 byte7, byte6, byte5, byte4;
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#endif
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};
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/* Ethernet packet descriptor */
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struct desc {
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u32 next; /* pointer to next buffer, unused */
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#ifdef __ARMEB__
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u16 buf_len; /* buffer length */
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u16 pkt_len; /* packet length */
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u32 data; /* pointer to data buffer in RAM */
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u8 dest_id;
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u8 src_id;
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u16 flags;
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u8 qos;
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u8 padlen;
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u16 vlan_tci;
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#else
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u16 pkt_len; /* packet length */
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u16 buf_len; /* buffer length */
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u32 data; /* pointer to data buffer in RAM */
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u16 flags;
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u8 src_id;
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u8 dest_id;
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u16 vlan_tci;
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u8 padlen;
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u8 qos;
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#endif
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#ifdef __ARMEB__
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u8 dst_mac_0, dst_mac_1, dst_mac_2, dst_mac_3;
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u8 dst_mac_4, dst_mac_5, src_mac_0, src_mac_1;
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u8 src_mac_2, src_mac_3, src_mac_4, src_mac_5;
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#else
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u8 dst_mac_3, dst_mac_2, dst_mac_1, dst_mac_0;
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u8 src_mac_1, src_mac_0, dst_mac_5, dst_mac_4;
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u8 src_mac_5, src_mac_4, src_mac_3, src_mac_2;
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#endif
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};
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#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
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(n) * sizeof(struct desc))
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#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
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#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
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((n) + RX_DESCS) * sizeof(struct desc))
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#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
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#ifndef __ARMEB__
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static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
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{
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int i;
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for (i = 0; i < cnt; i++)
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dest[i] = swab32(src[i]);
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}
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#endif
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static spinlock_t mdio_lock;
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static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
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static int ports_open;
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static struct port *npe_port_tab[MAX_NPES];
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static struct dma_pool *dma_pool;
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static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
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int write, u16 cmd)
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{
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int cycles = 0;
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if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
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printk(KERN_ERR "%s: MII not ready to transmit\n", dev->name);
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return 0;
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}
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if (write) {
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__raw_writel(cmd & 0xFF, &mdio_regs->mdio_command[0]);
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__raw_writel(cmd >> 8, &mdio_regs->mdio_command[1]);
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}
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__raw_writel(((phy_id << 5) | location) & 0xFF,
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&mdio_regs->mdio_command[2]);
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__raw_writel((phy_id >> 3) | (write << 2) | 0x80 /* GO */,
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&mdio_regs->mdio_command[3]);
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while ((cycles < MAX_MDIO_RETRIES) &&
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(__raw_readl(&mdio_regs->mdio_command[3]) & 0x80)) {
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udelay(1);
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cycles++;
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}
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if (cycles == MAX_MDIO_RETRIES) {
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printk(KERN_ERR "%s: MII write failed\n", dev->name);
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return 0;
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}
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s: mdio_cmd() took %i cycles\n", dev->name,
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cycles);
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#endif
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if (write)
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return 0;
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if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
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printk(KERN_ERR "%s: MII read failed\n", dev->name);
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return 0;
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}
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return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
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(__raw_readl(&mdio_regs->mdio_status[1]) << 8);
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}
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static int mdio_read(struct net_device *dev, int phy_id, int location)
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{
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unsigned long flags;
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u16 val;
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spin_lock_irqsave(&mdio_lock, flags);
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val = mdio_cmd(dev, phy_id, location, 0, 0);
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spin_unlock_irqrestore(&mdio_lock, flags);
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return val;
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}
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static void mdio_write(struct net_device *dev, int phy_id, int location,
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int val)
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{
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unsigned long flags;
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spin_lock_irqsave(&mdio_lock, flags);
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mdio_cmd(dev, phy_id, location, 1, val);
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spin_unlock_irqrestore(&mdio_lock, flags);
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}
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static void phy_reset(struct net_device *dev, int phy_id)
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{
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struct port *port = netdev_priv(dev);
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int cycles = 0;
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mdio_write(dev, phy_id, MII_BMCR, port->mii_bmcr | BMCR_RESET);
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while (cycles < MAX_MII_RESET_RETRIES) {
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if (!(mdio_read(dev, phy_id, MII_BMCR) & BMCR_RESET)) {
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#if DEBUG_MDIO
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printk(KERN_DEBUG "%s: phy_reset() took %i cycles\n",
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dev->name, cycles);
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#endif
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return;
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}
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udelay(1);
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cycles++;
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}
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printk(KERN_ERR "%s: MII reset failed\n", dev->name);
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}
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static void eth_set_duplex(struct port *port)
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{
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if (port->mii.full_duplex)
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__raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
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&port->regs->tx_control[0]);
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else
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__raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
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&port->regs->tx_control[0]);
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}
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static void phy_check_media(struct port *port, int init)
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{
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if (mii_check_media(&port->mii, 1, init))
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eth_set_duplex(port);
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if (port->mii.force_media) { /* mii_check_media() doesn't work */
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struct net_device *dev = port->netdev;
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int cur_link = mii_link_ok(&port->mii);
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int prev_link = netif_carrier_ok(dev);
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if (!prev_link && cur_link) {
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printk(KERN_INFO "%s: link up\n", dev->name);
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netif_carrier_on(dev);
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} else if (prev_link && !cur_link) {
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printk(KERN_INFO "%s: link down\n", dev->name);
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netif_carrier_off(dev);
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}
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}
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}
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static void mdio_thread(struct work_struct *work)
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{
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struct port *port = container_of(work, struct port, mdio_thread.work);
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phy_check_media(port, 0);
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schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
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}
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static inline void debug_pkt(struct net_device *dev, const char *func,
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u8 *data, int len)
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{
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#if DEBUG_PKT_BYTES
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int i;
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printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
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for (i = 0; i < len; i++) {
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if (i >= DEBUG_PKT_BYTES)
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break;
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printk("%s%02X",
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((i == 6) || (i == 12) || (i >= 14)) ? " " : "",
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data[i]);
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}
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printk("\n");
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#endif
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}
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static inline void debug_desc(u32 phys, struct desc *desc)
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{
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#if DEBUG_DESC
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printk(KERN_DEBUG "%X: %X %3X %3X %08X %2X < %2X %4X %X"
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" %X %X %02X%02X%02X%02X%02X%02X < %02X%02X%02X%02X%02X%02X\n",
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phys, desc->next, desc->buf_len, desc->pkt_len,
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desc->data, desc->dest_id, desc->src_id, desc->flags,
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desc->qos, desc->padlen, desc->vlan_tci,
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desc->dst_mac_0, desc->dst_mac_1, desc->dst_mac_2,
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desc->dst_mac_3, desc->dst_mac_4, desc->dst_mac_5,
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desc->src_mac_0, desc->src_mac_1, desc->src_mac_2,
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desc->src_mac_3, desc->src_mac_4, desc->src_mac_5);
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#endif
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}
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static inline void debug_queue(unsigned int queue, int is_get, u32 phys)
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{
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#if DEBUG_QUEUES
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static struct {
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int queue;
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char *name;
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} names[] = {
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{ TX_QUEUE(0x10), "TX#0 " },
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{ TX_QUEUE(0x20), "TX#1 " },
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{ TX_QUEUE(0x00), "TX#2 " },
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{ RXFREE_QUEUE(0x10), "RX-free#0 " },
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{ RXFREE_QUEUE(0x20), "RX-free#1 " },
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{ RXFREE_QUEUE(0x00), "RX-free#2 " },
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{ TXDONE_QUEUE, "TX-done " },
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};
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int i;
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for (i = 0; i < ARRAY_SIZE(names); i++)
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if (names[i].queue == queue)
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break;
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printk(KERN_DEBUG "Queue %i %s%s %X\n", queue,
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i < ARRAY_SIZE(names) ? names[i].name : "",
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is_get ? "->" : "<-", phys);
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#endif
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}
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static inline u32 queue_get_entry(unsigned int queue)
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{
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u32 phys = qmgr_get_entry(queue);
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debug_queue(queue, 1, phys);
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return phys;
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}
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static inline int queue_get_desc(unsigned int queue, struct port *port,
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int is_tx)
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{
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u32 phys, tab_phys, n_desc;
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struct desc *tab;
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if (!(phys = queue_get_entry(queue)))
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return -1;
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phys &= ~0x1F; /* mask out non-address bits */
|
|
tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
|
|
tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
|
|
n_desc = (phys - tab_phys) / sizeof(struct desc);
|
|
BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
|
|
debug_desc(phys, &tab[n_desc]);
|
|
BUG_ON(tab[n_desc].next);
|
|
return n_desc;
|
|
}
|
|
|
|
static inline void queue_put_desc(unsigned int queue, u32 phys,
|
|
struct desc *desc)
|
|
{
|
|
debug_queue(queue, 0, phys);
|
|
debug_desc(phys, desc);
|
|
BUG_ON(phys & 0x1F);
|
|
qmgr_put_entry(queue, phys);
|
|
BUG_ON(qmgr_stat_overflow(queue));
|
|
}
|
|
|
|
|
|
static inline void dma_unmap_tx(struct port *port, struct desc *desc)
|
|
{
|
|
#ifdef __ARMEB__
|
|
dma_unmap_single(&port->netdev->dev, desc->data,
|
|
desc->buf_len, DMA_TO_DEVICE);
|
|
#else
|
|
dma_unmap_single(&port->netdev->dev, desc->data & ~3,
|
|
ALIGN((desc->data & 3) + desc->buf_len, 4),
|
|
DMA_TO_DEVICE);
|
|
#endif
|
|
}
|
|
|
|
|
|
static void eth_rx_irq(void *pdev)
|
|
{
|
|
struct net_device *dev = pdev;
|
|
struct port *port = netdev_priv(dev);
|
|
|
|
#if DEBUG_RX
|
|
printk(KERN_DEBUG "%s: eth_rx_irq\n", dev->name);
|
|
#endif
|
|
qmgr_disable_irq(port->plat->rxq);
|
|
netif_rx_schedule(dev, &port->napi);
|
|
}
|
|
|
|
static int eth_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct port *port = container_of(napi, struct port, napi);
|
|
struct net_device *dev = port->netdev;
|
|
unsigned int rxq = port->plat->rxq, rxfreeq = RXFREE_QUEUE(port->id);
|
|
int received = 0;
|
|
|
|
#if DEBUG_RX
|
|
printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
|
|
#endif
|
|
|
|
while (received < budget) {
|
|
struct sk_buff *skb;
|
|
struct desc *desc;
|
|
int n;
|
|
#ifdef __ARMEB__
|
|
struct sk_buff *temp;
|
|
u32 phys;
|
|
#endif
|
|
|
|
if ((n = queue_get_desc(rxq, port, 0)) < 0) {
|
|
#if DEBUG_RX
|
|
printk(KERN_DEBUG "%s: eth_poll netif_rx_complete\n",
|
|
dev->name);
|
|
#endif
|
|
netif_rx_complete(dev, napi);
|
|
qmgr_enable_irq(rxq);
|
|
if (!qmgr_stat_empty(rxq) &&
|
|
netif_rx_reschedule(dev, napi)) {
|
|
#if DEBUG_RX
|
|
printk(KERN_DEBUG "%s: eth_poll"
|
|
" netif_rx_reschedule successed\n",
|
|
dev->name);
|
|
#endif
|
|
qmgr_disable_irq(rxq);
|
|
continue;
|
|
}
|
|
#if DEBUG_RX
|
|
printk(KERN_DEBUG "%s: eth_poll all done\n",
|
|
dev->name);
|
|
#endif
|
|
return received; /* all work done */
|
|
}
|
|
|
|
desc = rx_desc_ptr(port, n);
|
|
|
|
#ifdef __ARMEB__
|
|
if ((skb = netdev_alloc_skb(dev, RX_BUFF_SIZE))) {
|
|
phys = dma_map_single(&dev->dev, skb->data,
|
|
RX_BUFF_SIZE, DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(&dev->dev, phys)) {
|
|
dev_kfree_skb(skb);
|
|
skb = NULL;
|
|
}
|
|
}
|
|
#else
|
|
skb = netdev_alloc_skb(dev,
|
|
ALIGN(NET_IP_ALIGN + desc->pkt_len, 4));
|
|
#endif
|
|
|
|
if (!skb) {
|
|
port->stat.rx_dropped++;
|
|
/* put the desc back on RX-ready queue */
|
|
desc->buf_len = MAX_MRU;
|
|
desc->pkt_len = 0;
|
|
queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
|
|
continue;
|
|
}
|
|
|
|
/* process received frame */
|
|
#ifdef __ARMEB__
|
|
temp = skb;
|
|
skb = port->rx_buff_tab[n];
|
|
dma_unmap_single(&dev->dev, desc->data - NET_IP_ALIGN,
|
|
RX_BUFF_SIZE, DMA_FROM_DEVICE);
|
|
#else
|
|
dma_sync_single(&dev->dev, desc->data - NET_IP_ALIGN,
|
|
RX_BUFF_SIZE, DMA_FROM_DEVICE);
|
|
memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
|
|
ALIGN(NET_IP_ALIGN + desc->pkt_len, 4) / 4);
|
|
#endif
|
|
skb_reserve(skb, NET_IP_ALIGN);
|
|
skb_put(skb, desc->pkt_len);
|
|
|
|
debug_pkt(dev, "eth_poll", skb->data, skb->len);
|
|
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
port->stat.rx_packets++;
|
|
port->stat.rx_bytes += skb->len;
|
|
netif_receive_skb(skb);
|
|
|
|
/* put the new buffer on RX-free queue */
|
|
#ifdef __ARMEB__
|
|
port->rx_buff_tab[n] = temp;
|
|
desc->data = phys + NET_IP_ALIGN;
|
|
#endif
|
|
desc->buf_len = MAX_MRU;
|
|
desc->pkt_len = 0;
|
|
queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
|
|
received++;
|
|
}
|
|
|
|
#if DEBUG_RX
|
|
printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
|
|
#endif
|
|
return received; /* not all work done */
|
|
}
|
|
|
|
|
|
static void eth_txdone_irq(void *unused)
|
|
{
|
|
u32 phys;
|
|
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
|
|
#endif
|
|
while ((phys = queue_get_entry(TXDONE_QUEUE)) != 0) {
|
|
u32 npe_id, n_desc;
|
|
struct port *port;
|
|
struct desc *desc;
|
|
int start;
|
|
|
|
npe_id = phys & 3;
|
|
BUG_ON(npe_id >= MAX_NPES);
|
|
port = npe_port_tab[npe_id];
|
|
BUG_ON(!port);
|
|
phys &= ~0x1F; /* mask out non-address bits */
|
|
n_desc = (phys - tx_desc_phys(port, 0)) / sizeof(struct desc);
|
|
BUG_ON(n_desc >= TX_DESCS);
|
|
desc = tx_desc_ptr(port, n_desc);
|
|
debug_desc(phys, desc);
|
|
|
|
if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
|
|
port->stat.tx_packets++;
|
|
port->stat.tx_bytes += desc->pkt_len;
|
|
|
|
dma_unmap_tx(port, desc);
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG "%s: eth_txdone_irq free %p\n",
|
|
port->netdev->name, port->tx_buff_tab[n_desc]);
|
|
#endif
|
|
free_buffer_irq(port->tx_buff_tab[n_desc]);
|
|
port->tx_buff_tab[n_desc] = NULL;
|
|
}
|
|
|
|
start = qmgr_stat_empty(port->plat->txreadyq);
|
|
queue_put_desc(port->plat->txreadyq, phys, desc);
|
|
if (start) {
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG "%s: eth_txdone_irq xmit ready\n",
|
|
port->netdev->name);
|
|
#endif
|
|
netif_wake_queue(port->netdev);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct port *port = netdev_priv(dev);
|
|
unsigned int txreadyq = port->plat->txreadyq;
|
|
int len, offset, bytes, n;
|
|
void *mem;
|
|
u32 phys;
|
|
struct desc *desc;
|
|
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
|
|
#endif
|
|
|
|
if (unlikely(skb->len > MAX_MRU)) {
|
|
dev_kfree_skb(skb);
|
|
port->stat.tx_errors++;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
debug_pkt(dev, "eth_xmit", skb->data, skb->len);
|
|
|
|
len = skb->len;
|
|
#ifdef __ARMEB__
|
|
offset = 0; /* no need to keep alignment */
|
|
bytes = len;
|
|
mem = skb->data;
|
|
#else
|
|
offset = (int)skb->data & 3; /* keep 32-bit alignment */
|
|
bytes = ALIGN(offset + len, 4);
|
|
if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
|
|
dev_kfree_skb(skb);
|
|
port->stat.tx_dropped++;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
|
|
dev_kfree_skb(skb);
|
|
#endif
|
|
|
|
phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(&dev->dev, phys)) {
|
|
#ifdef __ARMEB__
|
|
dev_kfree_skb(skb);
|
|
#else
|
|
kfree(mem);
|
|
#endif
|
|
port->stat.tx_dropped++;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
n = queue_get_desc(txreadyq, port, 1);
|
|
BUG_ON(n < 0);
|
|
desc = tx_desc_ptr(port, n);
|
|
|
|
#ifdef __ARMEB__
|
|
port->tx_buff_tab[n] = skb;
|
|
#else
|
|
port->tx_buff_tab[n] = mem;
|
|
#endif
|
|
desc->data = phys + offset;
|
|
desc->buf_len = desc->pkt_len = len;
|
|
|
|
/* NPE firmware pads short frames with zeros internally */
|
|
wmb();
|
|
queue_put_desc(TX_QUEUE(port->id), tx_desc_phys(port, n), desc);
|
|
dev->trans_start = jiffies;
|
|
|
|
if (qmgr_stat_empty(txreadyq)) {
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
|
|
#endif
|
|
netif_stop_queue(dev);
|
|
/* we could miss TX ready interrupt */
|
|
if (!qmgr_stat_empty(txreadyq)) {
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG "%s: eth_xmit ready again\n",
|
|
dev->name);
|
|
#endif
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
|
|
#if DEBUG_TX
|
|
printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
|
|
#endif
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
|
|
static struct net_device_stats *eth_stats(struct net_device *dev)
|
|
{
|
|
struct port *port = netdev_priv(dev);
|
|
return &port->stat;
|
|
}
|
|
|
|
static void eth_set_mcast_list(struct net_device *dev)
|
|
{
|
|
struct port *port = netdev_priv(dev);
|
|
struct dev_mc_list *mclist = dev->mc_list;
|
|
u8 diffs[ETH_ALEN], *addr;
|
|
int cnt = dev->mc_count, i;
|
|
|
|
if ((dev->flags & IFF_PROMISC) || !mclist || !cnt) {
|
|
__raw_writel(DEFAULT_RX_CNTRL0 & ~RX_CNTRL0_ADDR_FLTR_EN,
|
|
&port->regs->rx_control[0]);
|
|
return;
|
|
}
|
|
|
|
memset(diffs, 0, ETH_ALEN);
|
|
addr = mclist->dmi_addr; /* first MAC address */
|
|
|
|
while (--cnt && (mclist = mclist->next))
|
|
for (i = 0; i < ETH_ALEN; i++)
|
|
diffs[i] |= addr[i] ^ mclist->dmi_addr[i];
|
|
|
|
for (i = 0; i < ETH_ALEN; i++) {
|
|
__raw_writel(addr[i], &port->regs->mcast_addr[i]);
|
|
__raw_writel(~diffs[i], &port->regs->mcast_mask[i]);
|
|
}
|
|
|
|
__raw_writel(DEFAULT_RX_CNTRL0 | RX_CNTRL0_ADDR_FLTR_EN,
|
|
&port->regs->rx_control[0]);
|
|
}
|
|
|
|
|
|
static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
|
|
{
|
|
struct port *port = netdev_priv(dev);
|
|
unsigned int duplex_chg;
|
|
int err;
|
|
|
|
if (!netif_running(dev))
|
|
return -EINVAL;
|
|
err = generic_mii_ioctl(&port->mii, if_mii(req), cmd, &duplex_chg);
|
|
if (duplex_chg)
|
|
eth_set_duplex(port);
|
|
return err;
|
|
}
|
|
|
|
|
|
static int request_queues(struct port *port)
|
|
{
|
|
int err;
|
|
|
|
err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0);
|
|
if (err)
|
|
return err;
|
|
|
|
err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0);
|
|
if (err)
|
|
goto rel_rxfree;
|
|
|
|
err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0);
|
|
if (err)
|
|
goto rel_rx;
|
|
|
|
err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0);
|
|
if (err)
|
|
goto rel_tx;
|
|
|
|
/* TX-done queue handles skbs sent out by the NPEs */
|
|
if (!ports_open) {
|
|
err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0);
|
|
if (err)
|
|
goto rel_txready;
|
|
}
|
|
return 0;
|
|
|
|
rel_txready:
|
|
qmgr_release_queue(port->plat->txreadyq);
|
|
rel_tx:
|
|
qmgr_release_queue(TX_QUEUE(port->id));
|
|
rel_rx:
|
|
qmgr_release_queue(port->plat->rxq);
|
|
rel_rxfree:
|
|
qmgr_release_queue(RXFREE_QUEUE(port->id));
|
|
printk(KERN_DEBUG "%s: unable to request hardware queues\n",
|
|
port->netdev->name);
|
|
return err;
|
|
}
|
|
|
|
static void release_queues(struct port *port)
|
|
{
|
|
qmgr_release_queue(RXFREE_QUEUE(port->id));
|
|
qmgr_release_queue(port->plat->rxq);
|
|
qmgr_release_queue(TX_QUEUE(port->id));
|
|
qmgr_release_queue(port->plat->txreadyq);
|
|
|
|
if (!ports_open)
|
|
qmgr_release_queue(TXDONE_QUEUE);
|
|
}
|
|
|
|
static int init_queues(struct port *port)
|
|
{
|
|
int i;
|
|
|
|
if (!ports_open)
|
|
if (!(dma_pool = dma_pool_create(DRV_NAME, NULL,
|
|
POOL_ALLOC_SIZE, 32, 0)))
|
|
return -ENOMEM;
|
|
|
|
if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
|
|
&port->desc_tab_phys)))
|
|
return -ENOMEM;
|
|
memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
|
|
memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
|
|
memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
|
|
|
|
/* Setup RX buffers */
|
|
for (i = 0; i < RX_DESCS; i++) {
|
|
struct desc *desc = rx_desc_ptr(port, i);
|
|
buffer_t *buff; /* skb or kmalloc()ated memory */
|
|
void *data;
|
|
#ifdef __ARMEB__
|
|
if (!(buff = netdev_alloc_skb(port->netdev, RX_BUFF_SIZE)))
|
|
return -ENOMEM;
|
|
data = buff->data;
|
|
#else
|
|
if (!(buff = kmalloc(RX_BUFF_SIZE, GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
data = buff;
|
|
#endif
|
|
desc->buf_len = MAX_MRU;
|
|
desc->data = dma_map_single(&port->netdev->dev, data,
|
|
RX_BUFF_SIZE, DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(&port->netdev->dev, desc->data)) {
|
|
free_buffer(buff);
|
|
return -EIO;
|
|
}
|
|
desc->data += NET_IP_ALIGN;
|
|
port->rx_buff_tab[i] = buff;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void destroy_queues(struct port *port)
|
|
{
|
|
int i;
|
|
|
|
if (port->desc_tab) {
|
|
for (i = 0; i < RX_DESCS; i++) {
|
|
struct desc *desc = rx_desc_ptr(port, i);
|
|
buffer_t *buff = port->rx_buff_tab[i];
|
|
if (buff) {
|
|
dma_unmap_single(&port->netdev->dev,
|
|
desc->data - NET_IP_ALIGN,
|
|
RX_BUFF_SIZE, DMA_FROM_DEVICE);
|
|
free_buffer(buff);
|
|
}
|
|
}
|
|
for (i = 0; i < TX_DESCS; i++) {
|
|
struct desc *desc = tx_desc_ptr(port, i);
|
|
buffer_t *buff = port->tx_buff_tab[i];
|
|
if (buff) {
|
|
dma_unmap_tx(port, desc);
|
|
free_buffer(buff);
|
|
}
|
|
}
|
|
dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
|
|
port->desc_tab = NULL;
|
|
}
|
|
|
|
if (!ports_open && dma_pool) {
|
|
dma_pool_destroy(dma_pool);
|
|
dma_pool = NULL;
|
|
}
|
|
}
|
|
|
|
static int eth_open(struct net_device *dev)
|
|
{
|
|
struct port *port = netdev_priv(dev);
|
|
struct npe *npe = port->npe;
|
|
struct msg msg;
|
|
int i, err;
|
|
|
|
if (!npe_running(npe)) {
|
|
err = npe_load_firmware(npe, npe_name(npe), &dev->dev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
|
|
printk(KERN_ERR "%s: %s not responding\n", dev->name,
|
|
npe_name(npe));
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
mdio_write(dev, port->plat->phy, MII_BMCR, port->mii_bmcr);
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.cmd = NPE_VLAN_SETRXQOSENTRY;
|
|
msg.eth_id = port->id;
|
|
msg.byte5 = port->plat->rxq | 0x80;
|
|
msg.byte7 = port->plat->rxq << 4;
|
|
for (i = 0; i < 8; i++) {
|
|
msg.byte3 = i;
|
|
if (npe_send_recv_message(port->npe, &msg, "ETH_SET_RXQ"))
|
|
return -EIO;
|
|
}
|
|
|
|
msg.cmd = NPE_EDB_SETPORTADDRESS;
|
|
msg.eth_id = PHYSICAL_ID(port->id);
|
|
msg.byte2 = dev->dev_addr[0];
|
|
msg.byte3 = dev->dev_addr[1];
|
|
msg.byte4 = dev->dev_addr[2];
|
|
msg.byte5 = dev->dev_addr[3];
|
|
msg.byte6 = dev->dev_addr[4];
|
|
msg.byte7 = dev->dev_addr[5];
|
|
if (npe_send_recv_message(port->npe, &msg, "ETH_SET_MAC"))
|
|
return -EIO;
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.cmd = NPE_FW_SETFIREWALLMODE;
|
|
msg.eth_id = port->id;
|
|
if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
|
|
return -EIO;
|
|
|
|
if ((err = request_queues(port)) != 0)
|
|
return err;
|
|
|
|
if ((err = init_queues(port)) != 0) {
|
|
destroy_queues(port);
|
|
release_queues(port);
|
|
return err;
|
|
}
|
|
|
|
for (i = 0; i < ETH_ALEN; i++)
|
|
__raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
|
|
__raw_writel(0x08, &port->regs->random_seed);
|
|
__raw_writel(0x12, &port->regs->partial_empty_threshold);
|
|
__raw_writel(0x30, &port->regs->partial_full_threshold);
|
|
__raw_writel(0x08, &port->regs->tx_start_bytes);
|
|
__raw_writel(0x15, &port->regs->tx_deferral);
|
|
__raw_writel(0x08, &port->regs->tx_2part_deferral[0]);
|
|
__raw_writel(0x07, &port->regs->tx_2part_deferral[1]);
|
|
__raw_writel(0x80, &port->regs->slot_time);
|
|
__raw_writel(0x01, &port->regs->int_clock_threshold);
|
|
|
|
/* Populate queues with buffers, no failure after this point */
|
|
for (i = 0; i < TX_DESCS; i++)
|
|
queue_put_desc(port->plat->txreadyq,
|
|
tx_desc_phys(port, i), tx_desc_ptr(port, i));
|
|
|
|
for (i = 0; i < RX_DESCS; i++)
|
|
queue_put_desc(RXFREE_QUEUE(port->id),
|
|
rx_desc_phys(port, i), rx_desc_ptr(port, i));
|
|
|
|
__raw_writel(TX_CNTRL1_RETRIES, &port->regs->tx_control[1]);
|
|
__raw_writel(DEFAULT_TX_CNTRL0, &port->regs->tx_control[0]);
|
|
__raw_writel(0, &port->regs->rx_control[1]);
|
|
__raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
|
|
|
|
napi_enable(&port->napi);
|
|
phy_check_media(port, 1);
|
|
eth_set_mcast_list(dev);
|
|
netif_start_queue(dev);
|
|
schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
|
|
|
|
qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
|
|
eth_rx_irq, dev);
|
|
if (!ports_open) {
|
|
qmgr_set_irq(TXDONE_QUEUE, QUEUE_IRQ_SRC_NOT_EMPTY,
|
|
eth_txdone_irq, NULL);
|
|
qmgr_enable_irq(TXDONE_QUEUE);
|
|
}
|
|
ports_open++;
|
|
/* we may already have RX data, enables IRQ */
|
|
netif_rx_schedule(dev, &port->napi);
|
|
return 0;
|
|
}
|
|
|
|
static int eth_close(struct net_device *dev)
|
|
{
|
|
struct port *port = netdev_priv(dev);
|
|
struct msg msg;
|
|
int buffs = RX_DESCS; /* allocated RX buffers */
|
|
int i;
|
|
|
|
ports_open--;
|
|
qmgr_disable_irq(port->plat->rxq);
|
|
napi_disable(&port->napi);
|
|
netif_stop_queue(dev);
|
|
|
|
while (queue_get_desc(RXFREE_QUEUE(port->id), port, 0) >= 0)
|
|
buffs--;
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.cmd = NPE_SETLOOPBACK_MODE;
|
|
msg.eth_id = port->id;
|
|
msg.byte3 = 1;
|
|
if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
|
|
printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
|
|
|
|
i = 0;
|
|
do { /* drain RX buffers */
|
|
while (queue_get_desc(port->plat->rxq, port, 0) >= 0)
|
|
buffs--;
|
|
if (!buffs)
|
|
break;
|
|
if (qmgr_stat_empty(TX_QUEUE(port->id))) {
|
|
/* we have to inject some packet */
|
|
struct desc *desc;
|
|
u32 phys;
|
|
int n = queue_get_desc(port->plat->txreadyq, port, 1);
|
|
BUG_ON(n < 0);
|
|
desc = tx_desc_ptr(port, n);
|
|
phys = tx_desc_phys(port, n);
|
|
desc->buf_len = desc->pkt_len = 1;
|
|
wmb();
|
|
queue_put_desc(TX_QUEUE(port->id), phys, desc);
|
|
}
|
|
udelay(1);
|
|
} while (++i < MAX_CLOSE_WAIT);
|
|
|
|
if (buffs)
|
|
printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
|
|
" left in NPE\n", dev->name, buffs);
|
|
#if DEBUG_CLOSE
|
|
if (!buffs)
|
|
printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
|
|
#endif
|
|
|
|
buffs = TX_DESCS;
|
|
while (queue_get_desc(TX_QUEUE(port->id), port, 1) >= 0)
|
|
buffs--; /* cancel TX */
|
|
|
|
i = 0;
|
|
do {
|
|
while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
|
|
buffs--;
|
|
if (!buffs)
|
|
break;
|
|
} while (++i < MAX_CLOSE_WAIT);
|
|
|
|
if (buffs)
|
|
printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
|
|
"left in NPE\n", dev->name, buffs);
|
|
#if DEBUG_CLOSE
|
|
if (!buffs)
|
|
printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
|
|
#endif
|
|
|
|
msg.byte3 = 0;
|
|
if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
|
|
printk(KERN_CRIT "%s: unable to disable loopback\n",
|
|
dev->name);
|
|
|
|
port->mii_bmcr = mdio_read(dev, port->plat->phy, MII_BMCR) &
|
|
~(BMCR_RESET | BMCR_PDOWN); /* may have been altered */
|
|
mdio_write(dev, port->plat->phy, MII_BMCR,
|
|
port->mii_bmcr | BMCR_PDOWN);
|
|
|
|
if (!ports_open)
|
|
qmgr_disable_irq(TXDONE_QUEUE);
|
|
cancel_rearming_delayed_work(&port->mdio_thread);
|
|
destroy_queues(port);
|
|
release_queues(port);
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit eth_init_one(struct platform_device *pdev)
|
|
{
|
|
struct port *port;
|
|
struct net_device *dev;
|
|
struct eth_plat_info *plat = pdev->dev.platform_data;
|
|
u32 regs_phys;
|
|
int err;
|
|
|
|
if (!(dev = alloc_etherdev(sizeof(struct port))))
|
|
return -ENOMEM;
|
|
|
|
SET_NETDEV_DEV(dev, &pdev->dev);
|
|
port = netdev_priv(dev);
|
|
port->netdev = dev;
|
|
port->id = pdev->id;
|
|
|
|
switch (port->id) {
|
|
case IXP4XX_ETH_NPEA:
|
|
port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
|
|
regs_phys = IXP4XX_EthA_BASE_PHYS;
|
|
break;
|
|
case IXP4XX_ETH_NPEB:
|
|
port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
|
|
regs_phys = IXP4XX_EthB_BASE_PHYS;
|
|
break;
|
|
case IXP4XX_ETH_NPEC:
|
|
port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
|
|
regs_phys = IXP4XX_EthC_BASE_PHYS;
|
|
break;
|
|
default:
|
|
err = -ENOSYS;
|
|
goto err_free;
|
|
}
|
|
|
|
dev->open = eth_open;
|
|
dev->hard_start_xmit = eth_xmit;
|
|
dev->stop = eth_close;
|
|
dev->get_stats = eth_stats;
|
|
dev->do_ioctl = eth_ioctl;
|
|
dev->set_multicast_list = eth_set_mcast_list;
|
|
dev->tx_queue_len = 100;
|
|
|
|
netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
|
|
|
|
if (!(port->npe = npe_request(NPE_ID(port->id)))) {
|
|
err = -EIO;
|
|
goto err_free;
|
|
}
|
|
|
|
if (register_netdev(dev)) {
|
|
err = -EIO;
|
|
goto err_npe_rel;
|
|
}
|
|
|
|
port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
|
|
if (!port->mem_res) {
|
|
err = -EBUSY;
|
|
goto err_unreg;
|
|
}
|
|
|
|
port->plat = plat;
|
|
npe_port_tab[NPE_ID(port->id)] = port;
|
|
memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
__raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
|
|
&port->regs->core_control);
|
|
udelay(50);
|
|
__raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
|
|
udelay(50);
|
|
|
|
port->mii.dev = dev;
|
|
port->mii.mdio_read = mdio_read;
|
|
port->mii.mdio_write = mdio_write;
|
|
port->mii.phy_id = plat->phy;
|
|
port->mii.phy_id_mask = 0x1F;
|
|
port->mii.reg_num_mask = 0x1F;
|
|
|
|
printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
|
|
npe_name(port->npe));
|
|
|
|
phy_reset(dev, plat->phy);
|
|
port->mii_bmcr = mdio_read(dev, plat->phy, MII_BMCR) &
|
|
~(BMCR_RESET | BMCR_PDOWN);
|
|
mdio_write(dev, plat->phy, MII_BMCR, port->mii_bmcr | BMCR_PDOWN);
|
|
|
|
INIT_DELAYED_WORK(&port->mdio_thread, mdio_thread);
|
|
return 0;
|
|
|
|
err_unreg:
|
|
unregister_netdev(dev);
|
|
err_npe_rel:
|
|
npe_release(port->npe);
|
|
err_free:
|
|
free_netdev(dev);
|
|
return err;
|
|
}
|
|
|
|
static int __devexit eth_remove_one(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev = platform_get_drvdata(pdev);
|
|
struct port *port = netdev_priv(dev);
|
|
|
|
unregister_netdev(dev);
|
|
npe_port_tab[NPE_ID(port->id)] = NULL;
|
|
platform_set_drvdata(pdev, NULL);
|
|
npe_release(port->npe);
|
|
release_resource(port->mem_res);
|
|
free_netdev(dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver drv = {
|
|
.driver.name = DRV_NAME,
|
|
.probe = eth_init_one,
|
|
.remove = eth_remove_one,
|
|
};
|
|
|
|
static int __init eth_init_module(void)
|
|
{
|
|
if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
|
|
return -ENOSYS;
|
|
|
|
/* All MII PHY accesses use NPE-B Ethernet registers */
|
|
spin_lock_init(&mdio_lock);
|
|
mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
|
|
__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
|
|
|
|
return platform_driver_register(&drv);
|
|
}
|
|
|
|
static void __exit eth_cleanup_module(void)
|
|
{
|
|
platform_driver_unregister(&drv);
|
|
}
|
|
|
|
MODULE_AUTHOR("Krzysztof Halasa");
|
|
MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:ixp4xx_eth");
|
|
module_init(eth_init_module);
|
|
module_exit(eth_cleanup_module);
|