summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/dec/tulip/media.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/ethernet/dec/tulip/media.c')
-rw-r--r--drivers/net/ethernet/dec/tulip/media.c547
1 files changed, 547 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 000000000..55d6fc99f
--- /dev/null
+++ b/drivers/net/ethernet/dec/tulip/media.c
@@ -0,0 +1,547 @@
+/*
+ drivers/net/ethernet/dec/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 submit bugs to http://bugzilla.kernel.org/ .
+*/
+
+#include <linux/kernel.h>
+#include <linux/mii.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: {
+ new_csr6 = 0; /* FIXME */
+
+ 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(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 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 < ARRAY_SIZE(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;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 14:55:01 +0000