diff options
Diffstat (limited to 'drivers/net/ethernet/dec/tulip/media.c')
| -rw-r--r-- | drivers/net/ethernet/dec/tulip/media.c | 556 |
1 files changed, 556 insertions, 0 deletions
diff --git a/drivers/net/ethernet/dec/tulip/media.c b/drivers/net/ethernet/dec/tulip/media.c new file mode 100644 index 000000000000..4bd13922875d --- /dev/null +++ b/drivers/net/ethernet/dec/tulip/media.c @@ -0,0 +1,556 @@ +/* + drivers/net/tulip/media.c + + Copyright 2000,2001 The Linux Kernel Team + Written/copyright 1994-2001 by Donald Becker. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html} + for more information on this driver. + + Please submit bugs to http://bugzilla.kernel.org/ . +*/ + +#include <linux/kernel.h> +#include <linux/mii.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include "tulip.h" + + +/* The maximum data clock rate is 2.5 Mhz. The minimum timing is usually + met by back-to-back PCI I/O cycles, but we insert a delay to avoid + "overclocking" issues or future 66Mhz PCI. */ +#define mdio_delay() ioread32(mdio_addr) + +/* Read and write the MII registers using software-generated serial + MDIO protocol. It is just different enough from the EEPROM protocol + to not share code. The maxium data clock rate is 2.5 Mhz. */ +#define MDIO_SHIFT_CLK 0x10000 +#define MDIO_DATA_WRITE0 0x00000 +#define MDIO_DATA_WRITE1 0x20000 +#define MDIO_ENB 0x00000 /* Ignore the 0x02000 databook setting. */ +#define MDIO_ENB_IN 0x40000 +#define MDIO_DATA_READ 0x80000 + +static const unsigned char comet_miireg2offset[32] = { + 0xB4, 0xB8, 0xBC, 0xC0, 0xC4, 0xC8, 0xCC, 0, 0,0,0,0, 0,0,0,0, + 0,0xD0,0,0, 0,0,0,0, 0,0,0,0, 0, 0xD4, 0xD8, 0xDC, }; + + +/* MII transceiver control section. + Read and write the MII registers using software-generated serial + MDIO protocol. + See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management functions") + or DP83840A data sheet for more details. + */ + +int tulip_mdio_read(struct net_device *dev, int phy_id, int location) +{ + struct tulip_private *tp = netdev_priv(dev); + int i; + int read_cmd = (0xf6 << 10) | ((phy_id & 0x1f) << 5) | location; + int retval = 0; + void __iomem *ioaddr = tp->base_addr; + void __iomem *mdio_addr = ioaddr + CSR9; + unsigned long flags; + + if (location & ~0x1f) + return 0xffff; + + if (tp->chip_id == COMET && phy_id == 30) { + if (comet_miireg2offset[location]) + return ioread32(ioaddr + comet_miireg2offset[location]); + return 0xffff; + } + + spin_lock_irqsave(&tp->mii_lock, flags); + if (tp->chip_id == LC82C168) { + iowrite32(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0); + ioread32(ioaddr + 0xA0); + ioread32(ioaddr + 0xA0); + for (i = 1000; i >= 0; --i) { + barrier(); + if ( ! ((retval = ioread32(ioaddr + 0xA0)) & 0x80000000)) + break; + } + spin_unlock_irqrestore(&tp->mii_lock, flags); + return retval & 0xffff; + } + + /* Establish sync by sending at least 32 logic ones. */ + for (i = 32; i >= 0; i--) { + iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr); + mdio_delay(); + iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Shift the read command bits out. */ + for (i = 15; i >= 0; i--) { + int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0; + + iowrite32(MDIO_ENB | dataval, mdio_addr); + mdio_delay(); + iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Read the two transition, 16 data, and wire-idle bits. */ + for (i = 19; i > 0; i--) { + iowrite32(MDIO_ENB_IN, mdio_addr); + mdio_delay(); + retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DATA_READ) ? 1 : 0); + iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + + spin_unlock_irqrestore(&tp->mii_lock, flags); + return (retval>>1) & 0xffff; +} + +void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int val) +{ + struct tulip_private *tp = netdev_priv(dev); + int i; + int cmd = (0x5002 << 16) | ((phy_id & 0x1f) << 23) | (location<<18) | (val & 0xffff); + void __iomem *ioaddr = tp->base_addr; + void __iomem *mdio_addr = ioaddr + CSR9; + unsigned long flags; + + if (location & ~0x1f) + return; + + if (tp->chip_id == COMET && phy_id == 30) { + if (comet_miireg2offset[location]) + iowrite32(val, ioaddr + comet_miireg2offset[location]); + return; + } + + spin_lock_irqsave(&tp->mii_lock, flags); + if (tp->chip_id == LC82C168) { + iowrite32(cmd, ioaddr + 0xA0); + for (i = 1000; i >= 0; --i) { + barrier(); + if ( ! (ioread32(ioaddr + 0xA0) & 0x80000000)) + break; + } + spin_unlock_irqrestore(&tp->mii_lock, flags); + return; + } + + /* Establish sync by sending 32 logic ones. */ + for (i = 32; i >= 0; i--) { + iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr); + mdio_delay(); + iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Shift the command bits out. */ + for (i = 31; i >= 0; i--) { + int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0; + iowrite32(MDIO_ENB | dataval, mdio_addr); + mdio_delay(); + iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + /* Clear out extra bits. */ + for (i = 2; i > 0; i--) { + iowrite32(MDIO_ENB_IN, mdio_addr); + mdio_delay(); + iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); + mdio_delay(); + } + + spin_unlock_irqrestore(&tp->mii_lock, flags); +} + + +/* Set up the transceiver control registers for the selected media type. */ +void tulip_select_media(struct net_device *dev, int startup) +{ + struct tulip_private *tp = netdev_priv(dev); + void __iomem *ioaddr = tp->base_addr; + struct mediatable *mtable = tp->mtable; + u32 new_csr6; + int i; + + if (mtable) { + struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index]; + unsigned char *p = mleaf->leafdata; + switch (mleaf->type) { + case 0: /* 21140 non-MII xcvr. */ + if (tulip_debug > 1) + netdev_dbg(dev, "Using a 21140 non-MII transceiver with control setting %02x\n", + p[1]); + dev->if_port = p[0]; + if (startup) + iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12); + iowrite32(p[1], ioaddr + CSR12); + new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18); + break; + case 2: case 4: { + u16 setup[5]; + u32 csr13val, csr14val, csr15dir, csr15val; + for (i = 0; i < 5; i++) + setup[i] = get_u16(&p[i*2 + 1]); + + dev->if_port = p[0] & MEDIA_MASK; + if (tulip_media_cap[dev->if_port] & MediaAlwaysFD) + tp->full_duplex = 1; + + if (startup && mtable->has_reset) { + struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset]; + unsigned char *rst = rleaf->leafdata; + if (tulip_debug > 1) + netdev_dbg(dev, "Resetting the transceiver\n"); + for (i = 0; i < rst[0]; i++) + iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15); + } + if (tulip_debug > 1) + netdev_dbg(dev, "21143 non-MII %s transceiver control %04x/%04x\n", + medianame[dev->if_port], + setup[0], setup[1]); + if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */ + csr13val = setup[0]; + csr14val = setup[1]; + csr15dir = (setup[3]<<16) | setup[2]; + csr15val = (setup[4]<<16) | setup[2]; + iowrite32(0, ioaddr + CSR13); + iowrite32(csr14val, ioaddr + CSR14); + iowrite32(csr15dir, ioaddr + CSR15); /* Direction */ + iowrite32(csr15val, ioaddr + CSR15); /* Data */ + iowrite32(csr13val, ioaddr + CSR13); + } else { + csr13val = 1; + csr14val = 0; + csr15dir = (setup[0]<<16) | 0x0008; + csr15val = (setup[1]<<16) | 0x0008; + if (dev->if_port <= 4) + csr14val = t21142_csr14[dev->if_port]; + if (startup) { + iowrite32(0, ioaddr + CSR13); + iowrite32(csr14val, ioaddr + CSR14); + } + iowrite32(csr15dir, ioaddr + CSR15); /* Direction */ + iowrite32(csr15val, ioaddr + CSR15); /* Data */ + if (startup) iowrite32(csr13val, ioaddr + CSR13); + } + if (tulip_debug > 1) + netdev_dbg(dev, "Setting CSR15 to %08x/%08x\n", + csr15dir, csr15val); + if (mleaf->type == 4) + new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18); + else + new_csr6 = 0x82420000; + break; + } + case 1: case 3: { + int phy_num = p[0]; + int init_length = p[1]; + u16 *misc_info, tmp_info; + + dev->if_port = 11; + new_csr6 = 0x020E0000; + if (mleaf->type == 3) { /* 21142 */ + u16 *init_sequence = (u16*)(p+2); + u16 *reset_sequence = &((u16*)(p+3))[init_length]; + int reset_length = p[2 + init_length*2]; + misc_info = reset_sequence + reset_length; + if (startup) { + int timeout = 10; /* max 1 ms */ + for (i = 0; i < reset_length; i++) + iowrite32(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15); + + /* flush posted writes */ + ioread32(ioaddr + CSR15); + + /* Sect 3.10.3 in DP83840A.pdf (p39) */ + udelay(500); + + /* Section 4.2 in DP83840A.pdf (p43) */ + /* and IEEE 802.3 "22.2.4.1.1 Reset" */ + while (timeout-- && + (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET)) + udelay(100); + } + for (i = 0; i < init_length; i++) + iowrite32(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15); + + ioread32(ioaddr + CSR15); /* flush posted writes */ + } else { + u8 *init_sequence = p + 2; + u8 *reset_sequence = p + 3 + init_length; + int reset_length = p[2 + init_length]; + misc_info = (u16*)(reset_sequence + reset_length); + if (startup) { + int timeout = 10; /* max 1 ms */ + iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12); + for (i = 0; i < reset_length; i++) + iowrite32(reset_sequence[i], ioaddr + CSR12); + + /* flush posted writes */ + ioread32(ioaddr + CSR12); + + /* Sect 3.10.3 in DP83840A.pdf (p39) */ + udelay(500); + + /* Section 4.2 in DP83840A.pdf (p43) */ + /* and IEEE 802.3 "22.2.4.1.1 Reset" */ + while (timeout-- && + (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET)) + udelay(100); + } + for (i = 0; i < init_length; i++) + iowrite32(init_sequence[i], ioaddr + CSR12); + + ioread32(ioaddr + CSR12); /* flush posted writes */ + } + + tmp_info = get_u16(&misc_info[1]); + if (tmp_info) + tp->advertising[phy_num] = tmp_info | 1; + if (tmp_info && startup < 2) { + if (tp->mii_advertise == 0) + tp->mii_advertise = tp->advertising[phy_num]; + if (tulip_debug > 1) + netdev_dbg(dev, " Advertising %04x on MII %d\n", + tp->mii_advertise, + tp->phys[phy_num]); + tulip_mdio_write(dev, tp->phys[phy_num], 4, tp->mii_advertise); + } + break; + } + case 5: case 6: { + u16 setup[5]; + + new_csr6 = 0; /* FIXME */ + + for (i = 0; i < 5; i++) + setup[i] = get_u16(&p[i*2 + 1]); + + if (startup && mtable->has_reset) { + struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset]; + unsigned char *rst = rleaf->leafdata; + if (tulip_debug > 1) + netdev_dbg(dev, "Resetting the transceiver\n"); + for (i = 0; i < rst[0]; i++) + iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15); + } + + break; + } + default: + netdev_dbg(dev, " Invalid media table selection %d\n", + mleaf->type); + new_csr6 = 0x020E0000; + } + if (tulip_debug > 1) + netdev_dbg(dev, "Using media type %s, CSR12 is %02x\n", + medianame[dev->if_port], + ioread32(ioaddr + CSR12) & 0xff); + } else if (tp->chip_id == LC82C168) { + if (startup && ! tp->medialock) + dev->if_port = tp->mii_cnt ? 11 : 0; + if (tulip_debug > 1) + netdev_dbg(dev, "PNIC PHY status is %3.3x, media %s\n", + ioread32(ioaddr + 0xB8), + medianame[dev->if_port]); + if (tp->mii_cnt) { + new_csr6 = 0x810C0000; + iowrite32(0x0001, ioaddr + CSR15); + iowrite32(0x0201B07A, ioaddr + 0xB8); + } else if (startup) { + /* Start with 10mbps to do autonegotiation. */ + iowrite32(0x32, ioaddr + CSR12); + new_csr6 = 0x00420000; + iowrite32(0x0001B078, ioaddr + 0xB8); + iowrite32(0x0201B078, ioaddr + 0xB8); + } else if (dev->if_port == 3 || dev->if_port == 5) { + iowrite32(0x33, ioaddr + CSR12); + new_csr6 = 0x01860000; + /* Trigger autonegotiation. */ + iowrite32(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8); + } else { + iowrite32(0x32, ioaddr + CSR12); + new_csr6 = 0x00420000; + iowrite32(0x1F078, ioaddr + 0xB8); + } + } else { /* Unknown chip type with no media table. */ + if (tp->default_port == 0) + dev->if_port = tp->mii_cnt ? 11 : 3; + if (tulip_media_cap[dev->if_port] & MediaIsMII) { + new_csr6 = 0x020E0000; + } else if (tulip_media_cap[dev->if_port] & MediaIsFx) { + new_csr6 = 0x02860000; + } else + new_csr6 = 0x03860000; + if (tulip_debug > 1) + netdev_dbg(dev, "No media description table, assuming %s transceiver, CSR12 %02x\n", + medianame[dev->if_port], + ioread32(ioaddr + CSR12)); + } + + tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0); + + mdelay(1); +} + +/* + Check the MII negotiated duplex and change the CSR6 setting if + required. + Return 0 if everything is OK. + Return < 0 if the transceiver is missing or has no link beat. + */ +int tulip_check_duplex(struct net_device *dev) +{ + struct tulip_private *tp = netdev_priv(dev); + unsigned int bmsr, lpa, negotiated, new_csr6; + + bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR); + lpa = tulip_mdio_read(dev, tp->phys[0], MII_LPA); + if (tulip_debug > 1) + dev_info(&dev->dev, "MII status %04x, Link partner report %04x\n", + bmsr, lpa); + if (bmsr == 0xffff) + return -2; + if ((bmsr & BMSR_LSTATUS) == 0) { + int new_bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR); + if ((new_bmsr & BMSR_LSTATUS) == 0) { + if (tulip_debug > 1) + dev_info(&dev->dev, + "No link beat on the MII interface, status %04x\n", + new_bmsr); + return -1; + } + } + negotiated = lpa & tp->advertising[0]; + tp->full_duplex = mii_duplex(tp->full_duplex_lock, negotiated); + + new_csr6 = tp->csr6; + + if (negotiated & LPA_100) new_csr6 &= ~TxThreshold; + else new_csr6 |= TxThreshold; + if (tp->full_duplex) new_csr6 |= FullDuplex; + else new_csr6 &= ~FullDuplex; + + if (new_csr6 != tp->csr6) { + tp->csr6 = new_csr6; + tulip_restart_rxtx(tp); + + if (tulip_debug > 0) + dev_info(&dev->dev, + "Setting %s-duplex based on MII#%d link partner capability of %04x\n", + tp->full_duplex ? "full" : "half", + tp->phys[0], lpa); + return 1; + } + + return 0; +} + +void __devinit tulip_find_mii (struct net_device *dev, int board_idx) +{ + struct tulip_private *tp = netdev_priv(dev); + int phyn, phy_idx = 0; + int mii_reg0; + int mii_advert; + unsigned int to_advert, new_bmcr, ane_switch; + + /* Find the connected MII xcvrs. + Doing this in open() would allow detecting external xcvrs later, + but takes much time. */ + for (phyn = 1; phyn <= 32 && phy_idx < sizeof (tp->phys); phyn++) { + int phy = phyn & 0x1f; + int mii_status = tulip_mdio_read (dev, phy, MII_BMSR); + if ((mii_status & 0x8301) == 0x8001 || + ((mii_status & BMSR_100BASE4) == 0 && + (mii_status & 0x7800) != 0)) { + /* preserve Becker logic, gain indentation level */ + } else { + continue; + } + + mii_reg0 = tulip_mdio_read (dev, phy, MII_BMCR); + mii_advert = tulip_mdio_read (dev, phy, MII_ADVERTISE); + ane_switch = 0; + + /* if not advertising at all, gen an + * advertising value from the capability + * bits in BMSR + */ + if ((mii_advert & ADVERTISE_ALL) == 0) { + unsigned int tmpadv = tulip_mdio_read (dev, phy, MII_BMSR); + mii_advert = ((tmpadv >> 6) & 0x3e0) | 1; + } + + if (tp->mii_advertise) { + tp->advertising[phy_idx] = + to_advert = tp->mii_advertise; + } else if (tp->advertising[phy_idx]) { + to_advert = tp->advertising[phy_idx]; + } else { + tp->advertising[phy_idx] = + tp->mii_advertise = + to_advert = mii_advert; + } + + tp->phys[phy_idx++] = phy; + + pr_info("tulip%d: MII transceiver #%d config %04x status %04x advertising %04x\n", + board_idx, phy, mii_reg0, mii_status, mii_advert); + + /* Fixup for DLink with miswired PHY. */ + if (mii_advert != to_advert) { + pr_debug("tulip%d: Advertising %04x on PHY %d, previously advertising %04x\n", + board_idx, to_advert, phy, mii_advert); + tulip_mdio_write (dev, phy, 4, to_advert); + } + + /* Enable autonegotiation: some boards default to off. */ + if (tp->default_port == 0) { + new_bmcr = mii_reg0 | BMCR_ANENABLE; + if (new_bmcr != mii_reg0) { + new_bmcr |= BMCR_ANRESTART; + ane_switch = 1; + } + } + /* ...or disable nway, if forcing media */ + else { + new_bmcr = mii_reg0 & ~BMCR_ANENABLE; + if (new_bmcr != mii_reg0) + ane_switch = 1; + } + + /* clear out bits we never want at this point */ + new_bmcr &= ~(BMCR_CTST | BMCR_FULLDPLX | BMCR_ISOLATE | + BMCR_PDOWN | BMCR_SPEED100 | BMCR_LOOPBACK | + BMCR_RESET); + + if (tp->full_duplex) + new_bmcr |= BMCR_FULLDPLX; + if (tulip_media_cap[tp->default_port] & MediaIs100) + new_bmcr |= BMCR_SPEED100; + + if (new_bmcr != mii_reg0) { + /* some phys need the ANE switch to + * happen before forced media settings + * will "take." However, we write the + * same value twice in order not to + * confuse the sane phys. + */ + if (ane_switch) { + tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr); + udelay (10); + } + tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr); + } + } + tp->mii_cnt = phy_idx; + if (tp->mtable && tp->mtable->has_mii && phy_idx == 0) { + pr_info("tulip%d: ***WARNING***: No MII transceiver found!\n", + board_idx); + tp->phys[0] = 1; + } +} |