s6gmac: xtensa s6000 on-chip ethernet driver
The s6000 on-chip MAC supports 10/100/1000Mbit and is connected to an
external PHY via MII or RGMII interface.
[jw@emlix.com: don't use device->bus_id directly]
Signed-off-by: Oskar Schirmer <os@emlix.com>
Signed-off-by: Daniel Glockner <dg@emlix.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Johannes Weiner <jw@emlix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Chris Zankel <chris@zankel.net>
diff --git a/drivers/net/s6gmac.c b/drivers/net/s6gmac.c
new file mode 100644
index 0000000..5345e47
--- /dev/null
+++ b/drivers/net/s6gmac.c
@@ -0,0 +1,1073 @@
+/*
+ * Ethernet driver for S6105 on chip network device
+ * (c)2008 emlix GmbH http://www.emlix.com
+ * Authors: Oskar Schirmer <os@emlix.com>
+ * Daniel Gloeckner <dg@emlix.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if.h>
+#include <linux/stddef.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <variant/hardware.h>
+#include <variant/dmac.h>
+
+#define DRV_NAME "s6gmac"
+#define DRV_PRMT DRV_NAME ": "
+
+
+/* register declarations */
+
+#define S6_GMAC_MACCONF1 0x000
+#define S6_GMAC_MACCONF1_TXENA 0
+#define S6_GMAC_MACCONF1_SYNCTX 1
+#define S6_GMAC_MACCONF1_RXENA 2
+#define S6_GMAC_MACCONF1_SYNCRX 3
+#define S6_GMAC_MACCONF1_TXFLOWCTRL 4
+#define S6_GMAC_MACCONF1_RXFLOWCTRL 5
+#define S6_GMAC_MACCONF1_LOOPBACK 8
+#define S6_GMAC_MACCONF1_RESTXFUNC 16
+#define S6_GMAC_MACCONF1_RESRXFUNC 17
+#define S6_GMAC_MACCONF1_RESTXMACCTRL 18
+#define S6_GMAC_MACCONF1_RESRXMACCTRL 19
+#define S6_GMAC_MACCONF1_SIMULRES 30
+#define S6_GMAC_MACCONF1_SOFTRES 31
+#define S6_GMAC_MACCONF2 0x004
+#define S6_GMAC_MACCONF2_FULL 0
+#define S6_GMAC_MACCONF2_CRCENA 1
+#define S6_GMAC_MACCONF2_PADCRCENA 2
+#define S6_GMAC_MACCONF2_LENGTHFCHK 4
+#define S6_GMAC_MACCONF2_HUGEFRAMENA 5
+#define S6_GMAC_MACCONF2_IFMODE 8
+#define S6_GMAC_MACCONF2_IFMODE_NIBBLE 1
+#define S6_GMAC_MACCONF2_IFMODE_BYTE 2
+#define S6_GMAC_MACCONF2_IFMODE_MASK 3
+#define S6_GMAC_MACCONF2_PREAMBLELEN 12
+#define S6_GMAC_MACCONF2_PREAMBLELEN_MASK 0x0F
+#define S6_GMAC_MACIPGIFG 0x008
+#define S6_GMAC_MACIPGIFG_B2BINTERPGAP 0
+#define S6_GMAC_MACIPGIFG_B2BINTERPGAP_MASK 0x7F
+#define S6_GMAC_MACIPGIFG_MINIFGENFORCE 8
+#define S6_GMAC_MACIPGIFG_B2BINTERPGAP2 16
+#define S6_GMAC_MACIPGIFG_B2BINTERPGAP1 24
+#define S6_GMAC_MACHALFDUPLEX 0x00C
+#define S6_GMAC_MACHALFDUPLEX_COLLISWIN 0
+#define S6_GMAC_MACHALFDUPLEX_COLLISWIN_MASK 0x3F
+#define S6_GMAC_MACHALFDUPLEX_RETXMAX 12
+#define S6_GMAC_MACHALFDUPLEX_RETXMAX_MASK 0x0F
+#define S6_GMAC_MACHALFDUPLEX_EXCESSDEF 16
+#define S6_GMAC_MACHALFDUPLEX_NOBACKOFF 17
+#define S6_GMAC_MACHALFDUPLEX_BPNOBCKOF 18
+#define S6_GMAC_MACHALFDUPLEX_ALTBEBENA 19
+#define S6_GMAC_MACHALFDUPLEX_ALTBEBTRN 20
+#define S6_GMAC_MACHALFDUPLEX_ALTBEBTR_MASK 0x0F
+#define S6_GMAC_MACMAXFRAMELEN 0x010
+#define S6_GMAC_MACMIICONF 0x020
+#define S6_GMAC_MACMIICONF_CSEL 0
+#define S6_GMAC_MACMIICONF_CSEL_DIV10 0
+#define S6_GMAC_MACMIICONF_CSEL_DIV12 1
+#define S6_GMAC_MACMIICONF_CSEL_DIV14 2
+#define S6_GMAC_MACMIICONF_CSEL_DIV18 3
+#define S6_GMAC_MACMIICONF_CSEL_DIV24 4
+#define S6_GMAC_MACMIICONF_CSEL_DIV34 5
+#define S6_GMAC_MACMIICONF_CSEL_DIV68 6
+#define S6_GMAC_MACMIICONF_CSEL_DIV168 7
+#define S6_GMAC_MACMIICONF_CSEL_MASK 7
+#define S6_GMAC_MACMIICONF_PREAMBLESUPR 4
+#define S6_GMAC_MACMIICONF_SCANAUTOINCR 5
+#define S6_GMAC_MACMIICMD 0x024
+#define S6_GMAC_MACMIICMD_READ 0
+#define S6_GMAC_MACMIICMD_SCAN 1
+#define S6_GMAC_MACMIIADDR 0x028
+#define S6_GMAC_MACMIIADDR_REG 0
+#define S6_GMAC_MACMIIADDR_REG_MASK 0x1F
+#define S6_GMAC_MACMIIADDR_PHY 8
+#define S6_GMAC_MACMIIADDR_PHY_MASK 0x1F
+#define S6_GMAC_MACMIICTRL 0x02C
+#define S6_GMAC_MACMIISTAT 0x030
+#define S6_GMAC_MACMIIINDI 0x034
+#define S6_GMAC_MACMIIINDI_BUSY 0
+#define S6_GMAC_MACMIIINDI_SCAN 1
+#define S6_GMAC_MACMIIINDI_INVAL 2
+#define S6_GMAC_MACINTERFSTAT 0x03C
+#define S6_GMAC_MACINTERFSTAT_LINKFAIL 3
+#define S6_GMAC_MACINTERFSTAT_EXCESSDEF 9
+#define S6_GMAC_MACSTATADDR1 0x040
+#define S6_GMAC_MACSTATADDR2 0x044
+
+#define S6_GMAC_FIFOCONF0 0x048
+#define S6_GMAC_FIFOCONF0_HSTRSTWT 0
+#define S6_GMAC_FIFOCONF0_HSTRSTSR 1
+#define S6_GMAC_FIFOCONF0_HSTRSTFR 2
+#define S6_GMAC_FIFOCONF0_HSTRSTST 3
+#define S6_GMAC_FIFOCONF0_HSTRSTFT 4
+#define S6_GMAC_FIFOCONF0_WTMENREQ 8
+#define S6_GMAC_FIFOCONF0_SRFENREQ 9
+#define S6_GMAC_FIFOCONF0_FRFENREQ 10
+#define S6_GMAC_FIFOCONF0_STFENREQ 11
+#define S6_GMAC_FIFOCONF0_FTFENREQ 12
+#define S6_GMAC_FIFOCONF0_WTMENRPLY 16
+#define S6_GMAC_FIFOCONF0_SRFENRPLY 17
+#define S6_GMAC_FIFOCONF0_FRFENRPLY 18
+#define S6_GMAC_FIFOCONF0_STFENRPLY 19
+#define S6_GMAC_FIFOCONF0_FTFENRPLY 20
+#define S6_GMAC_FIFOCONF1 0x04C
+#define S6_GMAC_FIFOCONF2 0x050
+#define S6_GMAC_FIFOCONF2_CFGLWM 0
+#define S6_GMAC_FIFOCONF2_CFGHWM 16
+#define S6_GMAC_FIFOCONF3 0x054
+#define S6_GMAC_FIFOCONF3_CFGFTTH 0
+#define S6_GMAC_FIFOCONF3_CFGHWMFT 16
+#define S6_GMAC_FIFOCONF4 0x058
+#define S6_GMAC_FIFOCONF_RSV_PREVDROP 0
+#define S6_GMAC_FIFOCONF_RSV_RUNT 1
+#define S6_GMAC_FIFOCONF_RSV_FALSECAR 2
+#define S6_GMAC_FIFOCONF_RSV_CODEERR 3
+#define S6_GMAC_FIFOCONF_RSV_CRCERR 4
+#define S6_GMAC_FIFOCONF_RSV_LENGTHERR 5
+#define S6_GMAC_FIFOCONF_RSV_LENRANGE 6
+#define S6_GMAC_FIFOCONF_RSV_OK 7
+#define S6_GMAC_FIFOCONF_RSV_MULTICAST 8
+#define S6_GMAC_FIFOCONF_RSV_BROADCAST 9
+#define S6_GMAC_FIFOCONF_RSV_DRIBBLE 10
+#define S6_GMAC_FIFOCONF_RSV_CTRLFRAME 11
+#define S6_GMAC_FIFOCONF_RSV_PAUSECTRL 12
+#define S6_GMAC_FIFOCONF_RSV_UNOPCODE 13
+#define S6_GMAC_FIFOCONF_RSV_VLANTAG 14
+#define S6_GMAC_FIFOCONF_RSV_LONGEVENT 15
+#define S6_GMAC_FIFOCONF_RSV_TRUNCATED 16
+#define S6_GMAC_FIFOCONF_RSV_MASK 0x3FFFF
+#define S6_GMAC_FIFOCONF5 0x05C
+#define S6_GMAC_FIFOCONF5_DROPLT64 18
+#define S6_GMAC_FIFOCONF5_CFGBYTM 19
+#define S6_GMAC_FIFOCONF5_RXDROPSIZE 20
+#define S6_GMAC_FIFOCONF5_RXDROPSIZE_MASK 0xF
+
+#define S6_GMAC_STAT_REGS 0x080
+#define S6_GMAC_STAT_SIZE_MIN 12
+#define S6_GMAC_STATTR64 0x080
+#define S6_GMAC_STATTR64_SIZE 18
+#define S6_GMAC_STATTR127 0x084
+#define S6_GMAC_STATTR127_SIZE 18
+#define S6_GMAC_STATTR255 0x088
+#define S6_GMAC_STATTR255_SIZE 18
+#define S6_GMAC_STATTR511 0x08C
+#define S6_GMAC_STATTR511_SIZE 18
+#define S6_GMAC_STATTR1K 0x090
+#define S6_GMAC_STATTR1K_SIZE 18
+#define S6_GMAC_STATTRMAX 0x094
+#define S6_GMAC_STATTRMAX_SIZE 18
+#define S6_GMAC_STATTRMGV 0x098
+#define S6_GMAC_STATTRMGV_SIZE 18
+#define S6_GMAC_STATRBYT 0x09C
+#define S6_GMAC_STATRBYT_SIZE 24
+#define S6_GMAC_STATRPKT 0x0A0
+#define S6_GMAC_STATRPKT_SIZE 18
+#define S6_GMAC_STATRFCS 0x0A4
+#define S6_GMAC_STATRFCS_SIZE 12
+#define S6_GMAC_STATRMCA 0x0A8
+#define S6_GMAC_STATRMCA_SIZE 18
+#define S6_GMAC_STATRBCA 0x0AC
+#define S6_GMAC_STATRBCA_SIZE 22
+#define S6_GMAC_STATRXCF 0x0B0
+#define S6_GMAC_STATRXCF_SIZE 18
+#define S6_GMAC_STATRXPF 0x0B4
+#define S6_GMAC_STATRXPF_SIZE 12
+#define S6_GMAC_STATRXUO 0x0B8
+#define S6_GMAC_STATRXUO_SIZE 12
+#define S6_GMAC_STATRALN 0x0BC
+#define S6_GMAC_STATRALN_SIZE 12
+#define S6_GMAC_STATRFLR 0x0C0
+#define S6_GMAC_STATRFLR_SIZE 16
+#define S6_GMAC_STATRCDE 0x0C4
+#define S6_GMAC_STATRCDE_SIZE 12
+#define S6_GMAC_STATRCSE 0x0C8
+#define S6_GMAC_STATRCSE_SIZE 12
+#define S6_GMAC_STATRUND 0x0CC
+#define S6_GMAC_STATRUND_SIZE 12
+#define S6_GMAC_STATROVR 0x0D0
+#define S6_GMAC_STATROVR_SIZE 12
+#define S6_GMAC_STATRFRG 0x0D4
+#define S6_GMAC_STATRFRG_SIZE 12
+#define S6_GMAC_STATRJBR 0x0D8
+#define S6_GMAC_STATRJBR_SIZE 12
+#define S6_GMAC_STATRDRP 0x0DC
+#define S6_GMAC_STATRDRP_SIZE 12
+#define S6_GMAC_STATTBYT 0x0E0
+#define S6_GMAC_STATTBYT_SIZE 24
+#define S6_GMAC_STATTPKT 0x0E4
+#define S6_GMAC_STATTPKT_SIZE 18
+#define S6_GMAC_STATTMCA 0x0E8
+#define S6_GMAC_STATTMCA_SIZE 18
+#define S6_GMAC_STATTBCA 0x0EC
+#define S6_GMAC_STATTBCA_SIZE 18
+#define S6_GMAC_STATTXPF 0x0F0
+#define S6_GMAC_STATTXPF_SIZE 12
+#define S6_GMAC_STATTDFR 0x0F4
+#define S6_GMAC_STATTDFR_SIZE 12
+#define S6_GMAC_STATTEDF 0x0F8
+#define S6_GMAC_STATTEDF_SIZE 12
+#define S6_GMAC_STATTSCL 0x0FC
+#define S6_GMAC_STATTSCL_SIZE 12
+#define S6_GMAC_STATTMCL 0x100
+#define S6_GMAC_STATTMCL_SIZE 12
+#define S6_GMAC_STATTLCL 0x104
+#define S6_GMAC_STATTLCL_SIZE 12
+#define S6_GMAC_STATTXCL 0x108
+#define S6_GMAC_STATTXCL_SIZE 12
+#define S6_GMAC_STATTNCL 0x10C
+#define S6_GMAC_STATTNCL_SIZE 13
+#define S6_GMAC_STATTPFH 0x110
+#define S6_GMAC_STATTPFH_SIZE 12
+#define S6_GMAC_STATTDRP 0x114
+#define S6_GMAC_STATTDRP_SIZE 12
+#define S6_GMAC_STATTJBR 0x118
+#define S6_GMAC_STATTJBR_SIZE 12
+#define S6_GMAC_STATTFCS 0x11C
+#define S6_GMAC_STATTFCS_SIZE 12
+#define S6_GMAC_STATTXCF 0x120
+#define S6_GMAC_STATTXCF_SIZE 12
+#define S6_GMAC_STATTOVR 0x124
+#define S6_GMAC_STATTOVR_SIZE 12
+#define S6_GMAC_STATTUND 0x128
+#define S6_GMAC_STATTUND_SIZE 12
+#define S6_GMAC_STATTFRG 0x12C
+#define S6_GMAC_STATTFRG_SIZE 12
+#define S6_GMAC_STATCARRY(n) (0x130 + 4*(n))
+#define S6_GMAC_STATCARRYMSK(n) (0x138 + 4*(n))
+#define S6_GMAC_STATCARRY1_RDRP 0
+#define S6_GMAC_STATCARRY1_RJBR 1
+#define S6_GMAC_STATCARRY1_RFRG 2
+#define S6_GMAC_STATCARRY1_ROVR 3
+#define S6_GMAC_STATCARRY1_RUND 4
+#define S6_GMAC_STATCARRY1_RCSE 5
+#define S6_GMAC_STATCARRY1_RCDE 6
+#define S6_GMAC_STATCARRY1_RFLR 7
+#define S6_GMAC_STATCARRY1_RALN 8
+#define S6_GMAC_STATCARRY1_RXUO 9
+#define S6_GMAC_STATCARRY1_RXPF 10
+#define S6_GMAC_STATCARRY1_RXCF 11
+#define S6_GMAC_STATCARRY1_RBCA 12
+#define S6_GMAC_STATCARRY1_RMCA 13
+#define S6_GMAC_STATCARRY1_RFCS 14
+#define S6_GMAC_STATCARRY1_RPKT 15
+#define S6_GMAC_STATCARRY1_RBYT 16
+#define S6_GMAC_STATCARRY1_TRMGV 25
+#define S6_GMAC_STATCARRY1_TRMAX 26
+#define S6_GMAC_STATCARRY1_TR1K 27
+#define S6_GMAC_STATCARRY1_TR511 28
+#define S6_GMAC_STATCARRY1_TR255 29
+#define S6_GMAC_STATCARRY1_TR127 30
+#define S6_GMAC_STATCARRY1_TR64 31
+#define S6_GMAC_STATCARRY2_TDRP 0
+#define S6_GMAC_STATCARRY2_TPFH 1
+#define S6_GMAC_STATCARRY2_TNCL 2
+#define S6_GMAC_STATCARRY2_TXCL 3
+#define S6_GMAC_STATCARRY2_TLCL 4
+#define S6_GMAC_STATCARRY2_TMCL 5
+#define S6_GMAC_STATCARRY2_TSCL 6
+#define S6_GMAC_STATCARRY2_TEDF 7
+#define S6_GMAC_STATCARRY2_TDFR 8
+#define S6_GMAC_STATCARRY2_TXPF 9
+#define S6_GMAC_STATCARRY2_TBCA 10
+#define S6_GMAC_STATCARRY2_TMCA 11
+#define S6_GMAC_STATCARRY2_TPKT 12
+#define S6_GMAC_STATCARRY2_TBYT 13
+#define S6_GMAC_STATCARRY2_TFRG 14
+#define S6_GMAC_STATCARRY2_TUND 15
+#define S6_GMAC_STATCARRY2_TOVR 16
+#define S6_GMAC_STATCARRY2_TXCF 17
+#define S6_GMAC_STATCARRY2_TFCS 18
+#define S6_GMAC_STATCARRY2_TJBR 19
+
+#define S6_GMAC_HOST_PBLKCTRL 0x140
+#define S6_GMAC_HOST_PBLKCTRL_TXENA 0
+#define S6_GMAC_HOST_PBLKCTRL_RXENA 1
+#define S6_GMAC_HOST_PBLKCTRL_TXSRES 2
+#define S6_GMAC_HOST_PBLKCTRL_RXSRES 3
+#define S6_GMAC_HOST_PBLKCTRL_TXBSIZ 8
+#define S6_GMAC_HOST_PBLKCTRL_RXBSIZ 12
+#define S6_GMAC_HOST_PBLKCTRL_SIZ_16 4
+#define S6_GMAC_HOST_PBLKCTRL_SIZ_32 5
+#define S6_GMAC_HOST_PBLKCTRL_SIZ_64 6
+#define S6_GMAC_HOST_PBLKCTRL_SIZ_128 7
+#define S6_GMAC_HOST_PBLKCTRL_SIZ_MASK 0xF
+#define S6_GMAC_HOST_PBLKCTRL_STATENA 16
+#define S6_GMAC_HOST_PBLKCTRL_STATAUTOZ 17
+#define S6_GMAC_HOST_PBLKCTRL_STATCLEAR 18
+#define S6_GMAC_HOST_PBLKCTRL_RGMII 19
+#define S6_GMAC_HOST_INTMASK 0x144
+#define S6_GMAC_HOST_INTSTAT 0x148
+#define S6_GMAC_HOST_INT_TXBURSTOVER 3
+#define S6_GMAC_HOST_INT_TXPREWOVER 4
+#define S6_GMAC_HOST_INT_RXBURSTUNDER 5
+#define S6_GMAC_HOST_INT_RXPOSTRFULL 6
+#define S6_GMAC_HOST_INT_RXPOSTRUNDER 7
+#define S6_GMAC_HOST_RXFIFOHWM 0x14C
+#define S6_GMAC_HOST_CTRLFRAMXP 0x150
+#define S6_GMAC_HOST_DSTADDRLO(n) (0x160 + 8*(n))
+#define S6_GMAC_HOST_DSTADDRHI(n) (0x164 + 8*(n))
+#define S6_GMAC_HOST_DSTMASKLO(n) (0x180 + 8*(n))
+#define S6_GMAC_HOST_DSTMASKHI(n) (0x184 + 8*(n))
+
+#define S6_GMAC_BURST_PREWR 0x1B0
+#define S6_GMAC_BURST_PREWR_LEN 0
+#define S6_GMAC_BURST_PREWR_LEN_MASK ((1 << 20) - 1)
+#define S6_GMAC_BURST_PREWR_CFE 20
+#define S6_GMAC_BURST_PREWR_PPE 21
+#define S6_GMAC_BURST_PREWR_FCS 22
+#define S6_GMAC_BURST_PREWR_PAD 23
+#define S6_GMAC_BURST_POSTRD 0x1D0
+#define S6_GMAC_BURST_POSTRD_LEN 0
+#define S6_GMAC_BURST_POSTRD_LEN_MASK ((1 << 20) - 1)
+#define S6_GMAC_BURST_POSTRD_DROP 20
+
+
+/* data handling */
+
+#define S6_NUM_TX_SKB 8 /* must be larger than TX fifo size */
+#define S6_NUM_RX_SKB 16
+#define S6_MAX_FRLEN 1536
+
+struct s6gmac {
+ u32 reg;
+ u32 tx_dma;
+ u32 rx_dma;
+ u32 io;
+ u8 tx_chan;
+ u8 rx_chan;
+ spinlock_t lock;
+ u8 tx_skb_i, tx_skb_o;
+ u8 rx_skb_i, rx_skb_o;
+ struct sk_buff *tx_skb[S6_NUM_TX_SKB];
+ struct sk_buff *rx_skb[S6_NUM_RX_SKB];
+ unsigned long carry[sizeof(struct net_device_stats) / sizeof(long)];
+ unsigned long stats[sizeof(struct net_device_stats) / sizeof(long)];
+ struct phy_device *phydev;
+ struct {
+ struct mii_bus *bus;
+ int irq[PHY_MAX_ADDR];
+ } mii;
+ struct {
+ unsigned int mbit;
+ u8 giga;
+ u8 isup;
+ u8 full;
+ } link;
+};
+
+static void s6gmac_rx_fillfifo(struct s6gmac *pd)
+{
+ struct sk_buff *skb;
+ while ((((u8)(pd->rx_skb_i - pd->rx_skb_o)) < S6_NUM_RX_SKB)
+ && (!s6dmac_fifo_full(pd->rx_dma, pd->rx_chan))
+ && (skb = dev_alloc_skb(S6_MAX_FRLEN + 2))) {
+ pd->rx_skb[(pd->rx_skb_i++) % S6_NUM_RX_SKB] = skb;
+ s6dmac_put_fifo_cache(pd->rx_dma, pd->rx_chan,
+ pd->io, (u32)skb->data, S6_MAX_FRLEN);
+ }
+}
+
+static void s6gmac_rx_interrupt(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ u32 pfx;
+ struct sk_buff *skb;
+ while (((u8)(pd->rx_skb_i - pd->rx_skb_o)) >
+ s6dmac_pending_count(pd->rx_dma, pd->rx_chan)) {
+ skb = pd->rx_skb[(pd->rx_skb_o++) % S6_NUM_RX_SKB];
+ pfx = readl(pd->reg + S6_GMAC_BURST_POSTRD);
+ if (pfx & (1 << S6_GMAC_BURST_POSTRD_DROP)) {
+ dev_kfree_skb_irq(skb);
+ } else {
+ skb_put(skb, (pfx >> S6_GMAC_BURST_POSTRD_LEN)
+ & S6_GMAC_BURST_POSTRD_LEN_MASK);
+ skb->dev = dev;
+ skb->protocol = eth_type_trans(skb, dev);
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ netif_rx(skb);
+ }
+ }
+}
+
+static void s6gmac_tx_interrupt(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ while (((u8)(pd->tx_skb_i - pd->tx_skb_o)) >
+ s6dmac_pending_count(pd->tx_dma, pd->tx_chan)) {
+ dev_kfree_skb_irq(pd->tx_skb[(pd->tx_skb_o++) % S6_NUM_TX_SKB]);
+ }
+ if (!s6dmac_fifo_full(pd->tx_dma, pd->tx_chan))
+ netif_wake_queue(dev);
+}
+
+struct s6gmac_statinf {
+ unsigned reg_size : 4; /* 0: unused */
+ unsigned reg_off : 6;
+ unsigned net_index : 6;
+};
+
+#define S6_STATS_B (8 * sizeof(u32))
+#define S6_STATS_C(b, r, f) [b] = { \
+ BUILD_BUG_ON_ZERO(r##_SIZE < S6_GMAC_STAT_SIZE_MIN) + \
+ BUILD_BUG_ON_ZERO((r##_SIZE - (S6_GMAC_STAT_SIZE_MIN - 1)) \
+ >= (1<<4)) + \
+ r##_SIZE - (S6_GMAC_STAT_SIZE_MIN - 1), \
+ BUILD_BUG_ON_ZERO(((unsigned)((r - S6_GMAC_STAT_REGS) / sizeof(u32))) \
+ >= ((1<<6)-1)) + \
+ (r - S6_GMAC_STAT_REGS) / sizeof(u32), \
+ BUILD_BUG_ON_ZERO((offsetof(struct net_device_stats, f)) \
+ % sizeof(unsigned long)) + \
+ BUILD_BUG_ON_ZERO((((unsigned)(offsetof(struct net_device_stats, f)) \
+ / sizeof(unsigned long)) >= (1<<6))) + \
+ BUILD_BUG_ON_ZERO((sizeof(((struct net_device_stats *)0)->f) \
+ != sizeof(unsigned long))) + \
+ (offsetof(struct net_device_stats, f)) / sizeof(unsigned long)},
+
+static const struct s6gmac_statinf statinf[2][S6_STATS_B] = { {
+ S6_STATS_C(S6_GMAC_STATCARRY1_RBYT, S6_GMAC_STATRBYT, rx_bytes)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RPKT, S6_GMAC_STATRPKT, rx_packets)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RFCS, S6_GMAC_STATRFCS, rx_crc_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RMCA, S6_GMAC_STATRMCA, multicast)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RALN, S6_GMAC_STATRALN, rx_frame_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RFLR, S6_GMAC_STATRFLR, rx_length_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RCDE, S6_GMAC_STATRCDE, rx_missed_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RUND, S6_GMAC_STATRUND, rx_length_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_ROVR, S6_GMAC_STATROVR, rx_length_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RFRG, S6_GMAC_STATRFRG, rx_crc_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RJBR, S6_GMAC_STATRJBR, rx_crc_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY1_RDRP, S6_GMAC_STATRDRP, rx_dropped)
+}, {
+ S6_STATS_C(S6_GMAC_STATCARRY2_TBYT, S6_GMAC_STATTBYT, tx_bytes)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TPKT, S6_GMAC_STATTPKT, tx_packets)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TEDF, S6_GMAC_STATTEDF, tx_aborted_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TXCL, S6_GMAC_STATTXCL, tx_aborted_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TNCL, S6_GMAC_STATTNCL, collisions)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TDRP, S6_GMAC_STATTDRP, tx_dropped)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TJBR, S6_GMAC_STATTJBR, tx_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TFCS, S6_GMAC_STATTFCS, tx_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TOVR, S6_GMAC_STATTOVR, tx_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TUND, S6_GMAC_STATTUND, tx_errors)
+ S6_STATS_C(S6_GMAC_STATCARRY2_TFRG, S6_GMAC_STATTFRG, tx_errors)
+} };
+
+static void s6gmac_stats_collect(struct s6gmac *pd,
+ const struct s6gmac_statinf *inf)
+{
+ int b;
+ for (b = 0; b < S6_STATS_B; b++) {
+ if (inf[b].reg_size) {
+ pd->stats[inf[b].net_index] +=
+ readl(pd->reg + S6_GMAC_STAT_REGS
+ + sizeof(u32) * inf[b].reg_off);
+ }
+ }
+}
+
+static void s6gmac_stats_carry(struct s6gmac *pd,
+ const struct s6gmac_statinf *inf, u32 mask)
+{
+ int b;
+ while (mask) {
+ b = fls(mask) - 1;
+ mask &= ~(1 << b);
+ pd->carry[inf[b].net_index] += (1 << inf[b].reg_size);
+ }
+}
+
+static inline u32 s6gmac_stats_pending(struct s6gmac *pd, int carry)
+{
+ int r = readl(pd->reg + S6_GMAC_STATCARRY(carry)) &
+ ~readl(pd->reg + S6_GMAC_STATCARRYMSK(carry));
+ return r;
+}
+
+static inline void s6gmac_stats_interrupt(struct s6gmac *pd, int carry)
+{
+ u32 mask;
+ mask = s6gmac_stats_pending(pd, carry);
+ if (mask) {
+ writel(mask, pd->reg + S6_GMAC_STATCARRY(carry));
+ s6gmac_stats_carry(pd, &statinf[carry][0], mask);
+ }
+}
+
+static irqreturn_t s6gmac_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = (struct net_device *)dev_id;
+ struct s6gmac *pd = netdev_priv(dev);
+ if (!dev)
+ return IRQ_NONE;
+ spin_lock(&pd->lock);
+ if (s6dmac_termcnt_irq(pd->rx_dma, pd->rx_chan))
+ s6gmac_rx_interrupt(dev);
+ s6gmac_rx_fillfifo(pd);
+ if (s6dmac_termcnt_irq(pd->tx_dma, pd->tx_chan))
+ s6gmac_tx_interrupt(dev);
+ s6gmac_stats_interrupt(pd, 0);
+ s6gmac_stats_interrupt(pd, 1);
+ spin_unlock(&pd->lock);
+ return IRQ_HANDLED;
+}
+
+static inline void s6gmac_set_dstaddr(struct s6gmac *pd, int n,
+ u32 addrlo, u32 addrhi, u32 masklo, u32 maskhi)
+{
+ writel(addrlo, pd->reg + S6_GMAC_HOST_DSTADDRLO(n));
+ writel(addrhi, pd->reg + S6_GMAC_HOST_DSTADDRHI(n));
+ writel(masklo, pd->reg + S6_GMAC_HOST_DSTMASKLO(n));
+ writel(maskhi, pd->reg + S6_GMAC_HOST_DSTMASKHI(n));
+}
+
+static inline void s6gmac_stop_device(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ writel(0, pd->reg + S6_GMAC_MACCONF1);
+}
+
+static inline void s6gmac_init_device(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ int is_rgmii = !!(pd->phydev->supported
+ & (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half));
+#if 0
+ writel(1 << S6_GMAC_MACCONF1_SYNCTX |
+ 1 << S6_GMAC_MACCONF1_SYNCRX |
+ 1 << S6_GMAC_MACCONF1_TXFLOWCTRL |
+ 1 << S6_GMAC_MACCONF1_RXFLOWCTRL |
+ 1 << S6_GMAC_MACCONF1_RESTXFUNC |
+ 1 << S6_GMAC_MACCONF1_RESRXFUNC |
+ 1 << S6_GMAC_MACCONF1_RESTXMACCTRL |
+ 1 << S6_GMAC_MACCONF1_RESRXMACCTRL,
+ pd->reg + S6_GMAC_MACCONF1);
+#endif
+ writel(1 << S6_GMAC_MACCONF1_SOFTRES, pd->reg + S6_GMAC_MACCONF1);
+ udelay(1000);
+ writel(1 << S6_GMAC_MACCONF1_TXENA | 1 << S6_GMAC_MACCONF1_RXENA,
+ pd->reg + S6_GMAC_MACCONF1);
+ writel(1 << S6_GMAC_HOST_PBLKCTRL_TXSRES |
+ 1 << S6_GMAC_HOST_PBLKCTRL_RXSRES,
+ pd->reg + S6_GMAC_HOST_PBLKCTRL);
+ writel(S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_TXBSIZ |
+ S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_RXBSIZ |
+ 1 << S6_GMAC_HOST_PBLKCTRL_STATENA |
+ 1 << S6_GMAC_HOST_PBLKCTRL_STATCLEAR |
+ is_rgmii << S6_GMAC_HOST_PBLKCTRL_RGMII,
+ pd->reg + S6_GMAC_HOST_PBLKCTRL);
+ writel(1 << S6_GMAC_MACCONF1_TXENA |
+ 1 << S6_GMAC_MACCONF1_RXENA |
+ (dev->flags & IFF_LOOPBACK ? 1 : 0)
+ << S6_GMAC_MACCONF1_LOOPBACK,
+ pd->reg + S6_GMAC_MACCONF1);
+ writel(dev->mtu && (dev->mtu < (S6_MAX_FRLEN - ETH_HLEN-ETH_FCS_LEN)) ?
+ dev->mtu+ETH_HLEN+ETH_FCS_LEN : S6_MAX_FRLEN,
+ pd->reg + S6_GMAC_MACMAXFRAMELEN);
+ writel((pd->link.full ? 1 : 0) << S6_GMAC_MACCONF2_FULL |
+ 1 << S6_GMAC_MACCONF2_PADCRCENA |
+ 1 << S6_GMAC_MACCONF2_LENGTHFCHK |
+ (pd->link.giga ?
+ S6_GMAC_MACCONF2_IFMODE_BYTE :
+ S6_GMAC_MACCONF2_IFMODE_NIBBLE)
+ << S6_GMAC_MACCONF2_IFMODE |
+ 7 << S6_GMAC_MACCONF2_PREAMBLELEN,
+ pd->reg + S6_GMAC_MACCONF2);
+ writel(0, pd->reg + S6_GMAC_MACSTATADDR1);
+ writel(0, pd->reg + S6_GMAC_MACSTATADDR2);
+ writel(1 << S6_GMAC_FIFOCONF0_WTMENREQ |
+ 1 << S6_GMAC_FIFOCONF0_SRFENREQ |
+ 1 << S6_GMAC_FIFOCONF0_FRFENREQ |
+ 1 << S6_GMAC_FIFOCONF0_STFENREQ |
+ 1 << S6_GMAC_FIFOCONF0_FTFENREQ,
+ pd->reg + S6_GMAC_FIFOCONF0);
+ writel(128 << S6_GMAC_FIFOCONF3_CFGFTTH |
+ 128 << S6_GMAC_FIFOCONF3_CFGHWMFT,
+ pd->reg + S6_GMAC_FIFOCONF3);
+ writel((S6_GMAC_FIFOCONF_RSV_MASK & ~(
+ 1 << S6_GMAC_FIFOCONF_RSV_RUNT |
+ 1 << S6_GMAC_FIFOCONF_RSV_CRCERR |
+ 1 << S6_GMAC_FIFOCONF_RSV_OK |
+ 1 << S6_GMAC_FIFOCONF_RSV_DRIBBLE |
+ 1 << S6_GMAC_FIFOCONF_RSV_CTRLFRAME |
+ 1 << S6_GMAC_FIFOCONF_RSV_PAUSECTRL |
+ 1 << S6_GMAC_FIFOCONF_RSV_UNOPCODE |
+ 1 << S6_GMAC_FIFOCONF_RSV_TRUNCATED)) |
+ 1 << S6_GMAC_FIFOCONF5_DROPLT64 |
+ pd->link.giga << S6_GMAC_FIFOCONF5_CFGBYTM |
+ 1 << S6_GMAC_FIFOCONF5_RXDROPSIZE,
+ pd->reg + S6_GMAC_FIFOCONF5);
+ writel(1 << S6_GMAC_FIFOCONF_RSV_RUNT |
+ 1 << S6_GMAC_FIFOCONF_RSV_CRCERR |
+ 1 << S6_GMAC_FIFOCONF_RSV_DRIBBLE |
+ 1 << S6_GMAC_FIFOCONF_RSV_CTRLFRAME |
+ 1 << S6_GMAC_FIFOCONF_RSV_PAUSECTRL |
+ 1 << S6_GMAC_FIFOCONF_RSV_UNOPCODE |
+ 1 << S6_GMAC_FIFOCONF_RSV_TRUNCATED,
+ pd->reg + S6_GMAC_FIFOCONF4);
+ s6gmac_set_dstaddr(pd, 0,
+ 0xFFFFFFFF, 0x0000FFFF, 0xFFFFFFFF, 0x0000FFFF);
+ s6gmac_set_dstaddr(pd, 1,
+ dev->dev_addr[5] |
+ dev->dev_addr[4] << 8 |
+ dev->dev_addr[3] << 16 |
+ dev->dev_addr[2] << 24,
+ dev->dev_addr[1] |
+ dev->dev_addr[0] << 8,
+ 0xFFFFFFFF, 0x0000FFFF);
+ s6gmac_set_dstaddr(pd, 2,
+ 0x00000000, 0x00000100, 0x00000000, 0x00000100);
+ s6gmac_set_dstaddr(pd, 3,
+ 0x00000000, 0x00000000, 0x00000000, 0x00000000);
+ writel(1 << S6_GMAC_HOST_PBLKCTRL_TXENA |
+ 1 << S6_GMAC_HOST_PBLKCTRL_RXENA |
+ S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_TXBSIZ |
+ S6_GMAC_HOST_PBLKCTRL_SIZ_128 << S6_GMAC_HOST_PBLKCTRL_RXBSIZ |
+ 1 << S6_GMAC_HOST_PBLKCTRL_STATENA |
+ 1 << S6_GMAC_HOST_PBLKCTRL_STATCLEAR |
+ is_rgmii << S6_GMAC_HOST_PBLKCTRL_RGMII,
+ pd->reg + S6_GMAC_HOST_PBLKCTRL);
+}
+
+static void s6mii_enable(struct s6gmac *pd)
+{
+ writel(readl(pd->reg + S6_GMAC_MACCONF1) &
+ ~(1 << S6_GMAC_MACCONF1_SOFTRES),
+ pd->reg + S6_GMAC_MACCONF1);
+ writel((readl(pd->reg + S6_GMAC_MACMIICONF)
+ & ~(S6_GMAC_MACMIICONF_CSEL_MASK << S6_GMAC_MACMIICONF_CSEL))
+ | (S6_GMAC_MACMIICONF_CSEL_DIV168 << S6_GMAC_MACMIICONF_CSEL),
+ pd->reg + S6_GMAC_MACMIICONF);
+}
+
+static int s6mii_busy(struct s6gmac *pd, int tmo)
+{
+ while (readl(pd->reg + S6_GMAC_MACMIIINDI)) {
+ if (--tmo == 0)
+ return -ETIME;
+ udelay(64);
+ }
+ return 0;
+}
+
+static int s6mii_read(struct mii_bus *bus, int phy_addr, int regnum)
+{
+ struct s6gmac *pd = bus->priv;
+ s6mii_enable(pd);
+ if (s6mii_busy(pd, 256))
+ return -ETIME;
+ writel(phy_addr << S6_GMAC_MACMIIADDR_PHY |
+ regnum << S6_GMAC_MACMIIADDR_REG,
+ pd->reg + S6_GMAC_MACMIIADDR);
+ writel(1 << S6_GMAC_MACMIICMD_READ, pd->reg + S6_GMAC_MACMIICMD);
+ writel(0, pd->reg + S6_GMAC_MACMIICMD);
+ if (s6mii_busy(pd, 256))
+ return -ETIME;
+ return (u16)readl(pd->reg + S6_GMAC_MACMIISTAT);
+}
+
+static int s6mii_write(struct mii_bus *bus, int phy_addr, int regnum, u16 value)
+{
+ struct s6gmac *pd = bus->priv;
+ s6mii_enable(pd);
+ if (s6mii_busy(pd, 256))
+ return -ETIME;
+ writel(phy_addr << S6_GMAC_MACMIIADDR_PHY |
+ regnum << S6_GMAC_MACMIIADDR_REG,
+ pd->reg + S6_GMAC_MACMIIADDR);
+ writel(value, pd->reg + S6_GMAC_MACMIICTRL);
+ if (s6mii_busy(pd, 256))
+ return -ETIME;
+ return 0;
+}
+
+static int s6mii_reset(struct mii_bus *bus)
+{
+ struct s6gmac *pd = bus->priv;
+ s6mii_enable(pd);
+ if (s6mii_busy(pd, PHY_INIT_TIMEOUT))
+ return -ETIME;
+ return 0;
+}
+
+static void s6gmac_set_rgmii_txclock(struct s6gmac *pd)
+{
+ u32 pllsel = readl(S6_REG_GREG1 + S6_GREG1_PLLSEL);
+ pllsel &= ~(S6_GREG1_PLLSEL_GMAC_MASK << S6_GREG1_PLLSEL_GMAC);
+ switch (pd->link.mbit) {
+ case 10:
+ pllsel |= S6_GREG1_PLLSEL_GMAC_2500KHZ << S6_GREG1_PLLSEL_GMAC;
+ break;
+ case 100:
+ pllsel |= S6_GREG1_PLLSEL_GMAC_25MHZ << S6_GREG1_PLLSEL_GMAC;
+ break;
+ case 1000:
+ pllsel |= S6_GREG1_PLLSEL_GMAC_125MHZ << S6_GREG1_PLLSEL_GMAC;
+ break;
+ default:
+ return;
+ }
+ writel(pllsel, S6_REG_GREG1 + S6_GREG1_PLLSEL);
+}
+
+static inline void s6gmac_linkisup(struct net_device *dev, int isup)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ struct phy_device *phydev = pd->phydev;
+
+ pd->link.full = phydev->duplex;
+ pd->link.giga = (phydev->speed == 1000);
+ if (pd->link.mbit != phydev->speed) {
+ pd->link.mbit = phydev->speed;
+ s6gmac_set_rgmii_txclock(pd);
+ }
+ pd->link.isup = isup;
+ if (isup)
+ netif_carrier_on(dev);
+ phy_print_status(phydev);
+}
+
+static void s6gmac_adjust_link(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ struct phy_device *phydev = pd->phydev;
+ if (pd->link.isup &&
+ (!phydev->link ||
+ (pd->link.mbit != phydev->speed) ||
+ (pd->link.full != phydev->duplex))) {
+ pd->link.isup = 0;
+ netif_tx_disable(dev);
+ if (!phydev->link) {
+ netif_carrier_off(dev);
+ phy_print_status(phydev);
+ }
+ }
+ if (!pd->link.isup && phydev->link) {
+ if (pd->link.full != phydev->duplex) {
+ u32 maccfg = readl(pd->reg + S6_GMAC_MACCONF2);
+ if (phydev->duplex)
+ maccfg |= 1 << S6_GMAC_MACCONF2_FULL;
+ else
+ maccfg &= ~(1 << S6_GMAC_MACCONF2_FULL);
+ writel(maccfg, pd->reg + S6_GMAC_MACCONF2);
+ }
+
+ if (pd->link.giga != (phydev->speed == 1000)) {
+ u32 fifocfg = readl(pd->reg + S6_GMAC_FIFOCONF5);
+ u32 maccfg = readl(pd->reg + S6_GMAC_MACCONF2);
+ maccfg &= ~(S6_GMAC_MACCONF2_IFMODE_MASK
+ << S6_GMAC_MACCONF2_IFMODE);
+ if (phydev->speed == 1000) {
+ fifocfg |= 1 << S6_GMAC_FIFOCONF5_CFGBYTM;
+ maccfg |= S6_GMAC_MACCONF2_IFMODE_BYTE
+ << S6_GMAC_MACCONF2_IFMODE;
+ } else {
+ fifocfg &= ~(1 << S6_GMAC_FIFOCONF5_CFGBYTM);
+ maccfg |= S6_GMAC_MACCONF2_IFMODE_NIBBLE
+ << S6_GMAC_MACCONF2_IFMODE;
+ }
+ writel(fifocfg, pd->reg + S6_GMAC_FIFOCONF5);
+ writel(maccfg, pd->reg + S6_GMAC_MACCONF2);
+ }
+
+ if (!s6dmac_fifo_full(pd->tx_dma, pd->tx_chan))
+ netif_wake_queue(dev);
+ s6gmac_linkisup(dev, 1);
+ }
+}
+
+static inline int s6gmac_phy_start(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ int i = 0;
+ struct phy_device *p = NULL;
+ while ((!(p = pd->mii.bus->phy_map[i])) && (i < PHY_MAX_ADDR))
+ i++;
+ p = phy_connect(dev, dev_name(&p->dev), &s6gmac_adjust_link, 0,
+ PHY_INTERFACE_MODE_RGMII);
+ if (IS_ERR(p)) {
+ printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
+ return PTR_ERR(p);
+ }
+ p->supported &= PHY_GBIT_FEATURES;
+ p->advertising = p->supported;
+ pd->phydev = p;
+ return 0;
+}
+
+static inline void s6gmac_init_stats(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ u32 mask;
+ mask = 1 << S6_GMAC_STATCARRY1_RDRP |
+ 1 << S6_GMAC_STATCARRY1_RJBR |
+ 1 << S6_GMAC_STATCARRY1_RFRG |
+ 1 << S6_GMAC_STATCARRY1_ROVR |
+ 1 << S6_GMAC_STATCARRY1_RUND |
+ 1 << S6_GMAC_STATCARRY1_RCDE |
+ 1 << S6_GMAC_STATCARRY1_RFLR |
+ 1 << S6_GMAC_STATCARRY1_RALN |
+ 1 << S6_GMAC_STATCARRY1_RMCA |
+ 1 << S6_GMAC_STATCARRY1_RFCS |
+ 1 << S6_GMAC_STATCARRY1_RPKT |
+ 1 << S6_GMAC_STATCARRY1_RBYT;
+ writel(mask, pd->reg + S6_GMAC_STATCARRY(0));
+ writel(~mask, pd->reg + S6_GMAC_STATCARRYMSK(0));
+ mask = 1 << S6_GMAC_STATCARRY2_TDRP |
+ 1 << S6_GMAC_STATCARRY2_TNCL |
+ 1 << S6_GMAC_STATCARRY2_TXCL |
+ 1 << S6_GMAC_STATCARRY2_TEDF |
+ 1 << S6_GMAC_STATCARRY2_TPKT |
+ 1 << S6_GMAC_STATCARRY2_TBYT |
+ 1 << S6_GMAC_STATCARRY2_TFRG |
+ 1 << S6_GMAC_STATCARRY2_TUND |
+ 1 << S6_GMAC_STATCARRY2_TOVR |
+ 1 << S6_GMAC_STATCARRY2_TFCS |
+ 1 << S6_GMAC_STATCARRY2_TJBR;
+ writel(mask, pd->reg + S6_GMAC_STATCARRY(1));
+ writel(~mask, pd->reg + S6_GMAC_STATCARRYMSK(1));
+}
+
+static inline void s6gmac_init_dmac(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ s6dmac_disable_chan(pd->tx_dma, pd->tx_chan);
+ s6dmac_disable_chan(pd->rx_dma, pd->rx_chan);
+ s6dmac_disable_error_irqs(pd->tx_dma, 1 << S6_HIFDMA_GMACTX);
+ s6dmac_disable_error_irqs(pd->rx_dma, 1 << S6_HIFDMA_GMACRX);
+}
+
+static int s6gmac_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ unsigned long flags;
+ spin_lock_irqsave(&pd->lock, flags);
+ dev->trans_start = jiffies;
+ writel(skb->len << S6_GMAC_BURST_PREWR_LEN |
+ 0 << S6_GMAC_BURST_PREWR_CFE |
+ 1 << S6_GMAC_BURST_PREWR_PPE |
+ 1 << S6_GMAC_BURST_PREWR_FCS |
+ ((skb->len < ETH_ZLEN) ? 1 : 0) << S6_GMAC_BURST_PREWR_PAD,
+ pd->reg + S6_GMAC_BURST_PREWR);
+ s6dmac_put_fifo_cache(pd->tx_dma, pd->tx_chan,
+ (u32)skb->data, pd->io, skb->len);
+ if (s6dmac_fifo_full(pd->tx_dma, pd->tx_chan))
+ netif_stop_queue(dev);
+ if (((u8)(pd->tx_skb_i - pd->tx_skb_o)) >= S6_NUM_TX_SKB) {
+ printk(KERN_ERR "GMAC BUG: skb tx ring overflow [%x, %x]\n",
+ pd->tx_skb_o, pd->tx_skb_i);
+ BUG();
+ }
+ pd->tx_skb[(pd->tx_skb_i++) % S6_NUM_TX_SKB] = skb;
+ spin_unlock_irqrestore(&pd->lock, flags);
+ return 0;
+}
+
+static void s6gmac_tx_timeout(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ unsigned long flags;
+ spin_lock_irqsave(&pd->lock, flags);
+ s6gmac_tx_interrupt(dev);
+ spin_unlock_irqrestore(&pd->lock, flags);
+}
+
+static int s6gmac_open(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ unsigned long flags;
+ phy_read_status(pd->phydev);
+ spin_lock_irqsave(&pd->lock, flags);
+ pd->link.mbit = 0;
+ s6gmac_linkisup(dev, pd->phydev->link);
+ s6gmac_init_device(dev);
+ s6gmac_init_stats(dev);
+ s6gmac_init_dmac(dev);
+ s6gmac_rx_fillfifo(pd);
+ s6dmac_enable_chan(pd->rx_dma, pd->rx_chan,
+ 2, 1, 0, 1, 0, 0, 0, 7, -1, 2, 0, 1);
+ s6dmac_enable_chan(pd->tx_dma, pd->tx_chan,
+ 2, 0, 1, 0, 0, 0, 0, 7, -1, 2, 0, 1);
+ writel(0 << S6_GMAC_HOST_INT_TXBURSTOVER |
+ 0 << S6_GMAC_HOST_INT_TXPREWOVER |
+ 0 << S6_GMAC_HOST_INT_RXBURSTUNDER |
+ 0 << S6_GMAC_HOST_INT_RXPOSTRFULL |
+ 0 << S6_GMAC_HOST_INT_RXPOSTRUNDER,
+ pd->reg + S6_GMAC_HOST_INTMASK);
+ spin_unlock_irqrestore(&pd->lock, flags);
+ phy_start(pd->phydev);
+ netif_start_queue(dev);
+ return 0;
+}
+
+static int s6gmac_stop(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ unsigned long flags;
+ netif_stop_queue(dev);
+ phy_stop(pd->phydev);
+ spin_lock_irqsave(&pd->lock, flags);
+ s6gmac_init_dmac(dev);
+ s6gmac_stop_device(dev);
+ while (pd->tx_skb_i != pd->tx_skb_o)
+ dev_kfree_skb(pd->tx_skb[(pd->tx_skb_o++) % S6_NUM_TX_SKB]);
+ while (pd->rx_skb_i != pd->rx_skb_o)
+ dev_kfree_skb(pd->rx_skb[(pd->rx_skb_o++) % S6_NUM_RX_SKB]);
+ spin_unlock_irqrestore(&pd->lock, flags);
+ return 0;
+}
+
+static struct net_device_stats *s6gmac_stats(struct net_device *dev)
+{
+ struct s6gmac *pd = netdev_priv(dev);
+ struct net_device_stats *st = (struct net_device_stats *)&pd->stats;
+ int i;
+ do {
+ unsigned long flags;
+ spin_lock_irqsave(&pd->lock, flags);
+ for (i = 0; i < sizeof(pd->stats) / sizeof(unsigned long); i++)
+ pd->stats[i] =
+ pd->carry[i] << (S6_GMAC_STAT_SIZE_MIN - 1);
+ s6gmac_stats_collect(pd, &statinf[0][0]);
+ s6gmac_stats_collect(pd, &statinf[1][0]);
+ i = s6gmac_stats_pending(pd, 0) |
+ s6gmac_stats_pending(pd, 1);
+ spin_unlock_irqrestore(&pd->lock, flags);
+ } while (i);
+ st->rx_errors = st->rx_crc_errors +
+ st->rx_frame_errors +
+ st->rx_length_errors +
+ st->rx_missed_errors;
+ st->tx_errors += st->tx_aborted_errors;
+ return st;
+}
+
+static int __devinit s6gmac_probe(struct platform_device *pdev)
+{
+ struct net_device *dev;
+ struct s6gmac *pd;
+ int res;
+ unsigned long i;
+ struct mii_bus *mb;
+ dev = alloc_etherdev(sizeof(*pd));
+ if (!dev) {
+ printk(KERN_ERR DRV_PRMT "etherdev alloc failed, aborting.\n");
+ return -ENOMEM;
+ }
+ dev->open = s6gmac_open;
+ dev->stop = s6gmac_stop;
+ dev->hard_start_xmit = s6gmac_tx;
+ dev->tx_timeout = s6gmac_tx_timeout;
+ dev->watchdog_timeo = HZ;
+ dev->get_stats = s6gmac_stats;
+ dev->irq = platform_get_irq(pdev, 0);
+ pd = netdev_priv(dev);
+ memset(pd, 0, sizeof(*pd));
+ spin_lock_init(&pd->lock);
+ pd->reg = platform_get_resource(pdev, IORESOURCE_MEM, 0)->start;
+ i = platform_get_resource(pdev, IORESOURCE_DMA, 0)->start;
+ pd->tx_dma = DMA_MASK_DMAC(i);
+ pd->tx_chan = DMA_INDEX_CHNL(i);
+ i = platform_get_resource(pdev, IORESOURCE_DMA, 1)->start;
+ pd->rx_dma = DMA_MASK_DMAC(i);
+ pd->rx_chan = DMA_INDEX_CHNL(i);
+ pd->io = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
+ res = request_irq(dev->irq, &s6gmac_interrupt, 0, dev->name, dev);
+ if (res) {
+ printk(KERN_ERR DRV_PRMT "irq request failed: %d\n", dev->irq);
+ goto errirq;
+ }
+ res = register_netdev(dev);
+ if (res) {
+ printk(KERN_ERR DRV_PRMT "error registering device %s\n",
+ dev->name);
+ goto errdev;
+ }
+ mb = mdiobus_alloc();
+ if (!mb) {
+ printk(KERN_ERR DRV_PRMT "error allocating mii bus\n");
+ goto errmii;
+ }
+ mb->name = "s6gmac_mii";
+ mb->read = s6mii_read;
+ mb->write = s6mii_write;
+ mb->reset = s6mii_reset;
+ mb->priv = pd;
+ snprintf(mb->id, MII_BUS_ID_SIZE, "0");
+ mb->phy_mask = ~(1 << 0);
+ mb->irq = &pd->mii.irq[0];
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ int n = platform_get_irq(pdev, i + 1);
+ if (n < 0)
+ n = PHY_POLL;
+ pd->mii.irq[i] = n;
+ }
+ mdiobus_register(mb);
+ pd->mii.bus = mb;
+ res = s6gmac_phy_start(dev);
+ if (res)
+ return res;
+ platform_set_drvdata(pdev, dev);
+ return 0;
+errmii:
+ unregister_netdev(dev);
+errdev:
+ free_irq(dev->irq, dev);
+errirq:
+ free_netdev(dev);
+ return res;
+}
+
+static int __devexit s6gmac_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ if (dev) {
+ struct s6gmac *pd = netdev_priv(dev);
+ mdiobus_unregister(pd->mii.bus);
+ unregister_netdev(dev);
+ free_irq(dev->irq, dev);
+ free_netdev(dev);
+ platform_set_drvdata(pdev, NULL);
+ }
+ return 0;
+}
+
+static struct platform_driver s6gmac_driver = {
+ .probe = s6gmac_probe,
+ .remove = __devexit_p(s6gmac_remove),
+ .driver = {
+ .name = "s6gmac",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init s6gmac_init(void)
+{
+ printk(KERN_INFO DRV_PRMT "S6 GMAC ethernet driver\n");
+ return platform_driver_register(&s6gmac_driver);
+}
+
+
+static void __exit s6gmac_exit(void)
+{
+ platform_driver_unregister(&s6gmac_driver);
+}
+
+module_init(s6gmac_init);
+module_exit(s6gmac_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("S6105 on chip Ethernet driver");
+MODULE_AUTHOR("Oskar Schirmer <os@emlix.com>");