gmac.c
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上传日期:2013-02-24
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文件大小:44k
- /*
- * Network device driver for the GMAC ethernet controller on
- * Apple G4 Powermacs.
- *
- * Copyright (C) 2000 Paul Mackerras & Ben. Herrenschmidt
- *
- * portions based on sunhme.c by David S. Miller
- *
- * Changes:
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/06/2000
- * - check init_etherdev return in gmac_probe1
- * BenH <benh@kernel.crashing.org> - 03/09/2000
- * - Add support for new PHYs
- * - Add some PowerBook sleep code
- * BenH <benh@kernel.crashing.org> - ??/??/????
- * - PHY updates
- * BenH <benh@kernel.crashing.org> - 08/08/2001
- * - Add more PHYs, fixes to sleep code
- */
- #include <linux/module.h>
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/types.h>
- #include <linux/fcntl.h>
- #include <linux/interrupt.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/delay.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <asm/prom.h>
- #include <asm/io.h>
- #include <asm/pgtable.h>
- #include <asm/machdep.h>
- #include <asm/pmac_feature.h>
- #include <asm/keylargo.h>
- #include <asm/pci-bridge.h>
- #ifdef CONFIG_PMAC_PBOOK
- #include <linux/adb.h>
- #include <linux/pmu.h>
- #include <asm/irq.h>
- #endif
- #include "gmac.h"
- #define DEBUG_PHY
- /* Driver version 1.5, kernel 2.4.x */
- #define GMAC_VERSION "v1.5k4"
- #define DUMMY_BUF_LEN RX_BUF_ALLOC_SIZE + RX_OFFSET + GMAC_BUFFER_ALIGN
- static unsigned char *dummy_buf;
- static struct net_device *gmacs;
- /* Prototypes */
- static int mii_read(struct gmac *gm, int phy, int r);
- static int mii_write(struct gmac *gm, int phy, int r, int v);
- static void mii_poll_start(struct gmac *gm);
- static void mii_poll_stop(struct gmac *gm);
- static void mii_interrupt(struct gmac *gm);
- static int mii_lookup_and_reset(struct gmac *gm);
- static void mii_setup_phy(struct gmac *gm);
- static int mii_do_reset_phy(struct gmac *gm, int phy_addr);
- static void mii_init_BCM5400(struct gmac *gm);
- static void mii_init_BCM5401(struct gmac *gm);
- static void gmac_set_power(struct gmac *gm, int power_up);
- static int gmac_powerup_and_reset(struct net_device *dev);
- static void gmac_set_gigabit_mode(struct gmac *gm, int gigabit);
- static void gmac_set_duplex_mode(struct gmac *gm, int full_duplex);
- static void gmac_mac_init(struct gmac *gm, unsigned char *mac_addr);
- static void gmac_init_rings(struct gmac *gm, int from_irq);
- static void gmac_start_dma(struct gmac *gm);
- static void gmac_stop_dma(struct gmac *gm);
- static void gmac_set_multicast(struct net_device *dev);
- static int gmac_open(struct net_device *dev);
- static int gmac_close(struct net_device *dev);
- static void gmac_tx_timeout(struct net_device *dev);
- static int gmac_xmit_start(struct sk_buff *skb, struct net_device *dev);
- static void gmac_tx_cleanup(struct net_device *dev, int force_cleanup);
- static void gmac_receive(struct net_device *dev);
- static void gmac_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static struct net_device_stats *gmac_stats(struct net_device *dev);
- static int gmac_probe(void);
- static void gmac_probe1(struct device_node *gmac);
- #ifdef CONFIG_PMAC_PBOOK
- int gmac_sleep_notify(struct pmu_sleep_notifier *self, int when);
- static struct pmu_sleep_notifier gmac_sleep_notifier = {
- gmac_sleep_notify, SLEEP_LEVEL_NET,
- };
- #endif
- /*
- * Read via the mii interface from a PHY register
- */
- static int
- mii_read(struct gmac *gm, int phy, int r)
- {
- int timeout;
- GM_OUT(GM_MIF_FRAME_CTL_DATA,
- (0x01 << GM_MIF_FRAME_START_SHIFT) |
- (0x02 << GM_MIF_FRAME_OPCODE_SHIFT) |
- GM_MIF_FRAME_TURNAROUND_HI |
- (phy << GM_MIF_FRAME_PHY_ADDR_SHIFT) |
- (r << GM_MIF_FRAME_REG_ADDR_SHIFT));
-
- for (timeout = 1000; timeout > 0; --timeout) {
- udelay(20);
- if (GM_IN(GM_MIF_FRAME_CTL_DATA) & GM_MIF_FRAME_TURNAROUND_LO)
- return GM_IN(GM_MIF_FRAME_CTL_DATA) & GM_MIF_FRAME_DATA_MASK;
- }
- return -1;
- }
- /*
- * Write on the mii interface to a PHY register
- */
- static int
- mii_write(struct gmac *gm, int phy, int r, int v)
- {
- int timeout;
- GM_OUT(GM_MIF_FRAME_CTL_DATA,
- (0x01 << GM_MIF_FRAME_START_SHIFT) |
- (0x01 << GM_MIF_FRAME_OPCODE_SHIFT) |
- GM_MIF_FRAME_TURNAROUND_HI |
- (phy << GM_MIF_FRAME_PHY_ADDR_SHIFT) |
- (r << GM_MIF_FRAME_REG_ADDR_SHIFT) |
- (v & GM_MIF_FRAME_DATA_MASK));
- for (timeout = 1000; timeout > 0; --timeout) {
- udelay(20);
- if (GM_IN(GM_MIF_FRAME_CTL_DATA) & GM_MIF_FRAME_TURNAROUND_LO)
- return 0;
- }
- return -1;
- }
- /*
- * Start MIF autopolling of the PHY status register
- */
- static void
- mii_poll_start(struct gmac *gm)
- {
- unsigned int tmp;
-
- /* Start the MIF polling on the external transceiver. */
- tmp = GM_IN(GM_MIF_CFG);
- tmp &= ~(GM_MIF_CFGPR_MASK | GM_MIF_CFGPD_MASK);
- tmp |= ((gm->phy_addr & 0x1f) << GM_MIF_CFGPD_SHIFT);
- tmp |= (MII_SR << GM_MIF_CFGPR_SHIFT);
- tmp |= GM_MIF_CFGPE;
- GM_OUT(GM_MIF_CFG, tmp);
- /* Let the bits set. */
- udelay(GM_MIF_POLL_DELAY);
- GM_OUT(GM_MIF_IRQ_MASK, 0xffc0);
- }
- /*
- * Stop MIF autopolling of the PHY status register
- */
- static void
- mii_poll_stop(struct gmac *gm)
- {
- GM_OUT(GM_MIF_IRQ_MASK, 0xffff);
- GM_BIC(GM_MIF_CFG, GM_MIF_CFGPE);
- udelay(GM_MIF_POLL_DELAY);
- }
- /*
- * Called when the MIF detect a change of the PHY status
- *
- * handles monitoring the link and updating GMAC with the correct
- * duplex mode.
- *
- * Note: Are we missing status changes ? In this case, we'll have to
- * a timer and control the autoneg. process more closely. Also, we may
- * want to stop rx and tx side when the link is down.
- */
- /* Link modes of the BCM5400 PHY */
- static int phy_BCM5400_link_table[8][3] = {
- { 0, 0, 0 }, /* No link */
- { 0, 0, 0 }, /* 10BT Half Duplex */
- { 1, 0, 0 }, /* 10BT Full Duplex */
- { 0, 1, 0 }, /* 100BT Half Duplex */
- { 0, 1, 0 }, /* 100BT Half Duplex */
- { 1, 1, 0 }, /* 100BT Full Duplex*/
- { 1, 0, 1 }, /* 1000BT */
- { 1, 0, 1 }, /* 1000BT */
- };
- static void
- mii_interrupt(struct gmac *gm)
- {
- int phy_status;
- int lpar_ability;
-
- mii_poll_stop(gm);
- /* May the status change before polling is re-enabled ? */
- mii_poll_start(gm);
-
- /* We read the Auxilliary Status Summary register */
- phy_status = mii_read(gm, gm->phy_addr, MII_SR);
- if ((phy_status ^ gm->phy_status) & (MII_SR_ASSC | MII_SR_LKS)) {
- int full_duplex = 0;
- int link_100 = 0;
- int gigabit = 0;
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: Link state change, phy_status: 0x%04xn",
- gm->dev->name, phy_status);
- #endif
- gm->phy_status = phy_status;
- /* Should we enable that in generic mode ? */
- lpar_ability = mii_read(gm, gm->phy_addr, MII_ANLPA);
- if (lpar_ability & MII_ANLPA_PAUS)
- GM_BIS(GM_MAC_CTRL_CONFIG, GM_MAC_CTRL_CONF_SND_PAUSE_EN);
- else
- GM_BIC(GM_MAC_CTRL_CONFIG, GM_MAC_CTRL_CONF_SND_PAUSE_EN);
- /* Link ? Check for speed and duplex */
- if ((phy_status & MII_SR_LKS) && (phy_status & MII_SR_ASSC)) {
- int restart = 0;
- int aux_stat, link;
- switch (gm->phy_type) {
- case PHY_B5201:
- case PHY_B5221:
- aux_stat = mii_read(gm, gm->phy_addr, MII_BCM5201_AUXCTLSTATUS);
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: Link up ! BCM5201/5221 aux_stat: 0x%04xn",
- gm->dev->name, aux_stat);
- #endif
- full_duplex = ((aux_stat & MII_BCM5201_AUXCTLSTATUS_DUPLEX) != 0);
- link_100 = ((aux_stat & MII_BCM5201_AUXCTLSTATUS_SPEED) != 0);
- break;
- case PHY_B5400:
- case PHY_B5401:
- case PHY_B5411:
- aux_stat = mii_read(gm, gm->phy_addr, MII_BCM5400_AUXSTATUS);
- link = (aux_stat & MII_BCM5400_AUXSTATUS_LINKMODE_MASK) >>
- MII_BCM5400_AUXSTATUS_LINKMODE_SHIFT;
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: Link up ! BCM54xx aux_stat: 0x%04x (link mode: %d)n",
- gm->dev->name, aux_stat, link);
- #endif
- full_duplex = phy_BCM5400_link_table[link][0];
- link_100 = phy_BCM5400_link_table[link][1];
- gigabit = phy_BCM5400_link_table[link][2];
- break;
- case PHY_LXT971:
- aux_stat = mii_read(gm, gm->phy_addr, MII_LXT971_STATUS2);
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: Link up ! LXT971 stat2: 0x%04xn",
- gm->dev->name, aux_stat);
- #endif
- full_duplex = ((aux_stat & MII_LXT971_STATUS2_FULLDUPLEX) != 0);
- link_100 = ((aux_stat & MII_LXT971_STATUS2_SPEED) != 0);
- break;
- default:
- full_duplex = (lpar_ability & MII_ANLPA_FDAM) != 0;
- link_100 = (lpar_ability & MII_ANLPA_100M) != 0;
- break;
- }
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: Full Duplex: %d, Speed: %sn",
- gm->dev->name, full_duplex,
- gigabit ? "1000" : (link_100 ? "100" : "10"));
- #endif
- if (gigabit != gm->gigabit) {
- gm->gigabit = gigabit;
- gmac_set_gigabit_mode(gm, gm->gigabit);
- restart = 1;
- }
- if (full_duplex != gm->full_duplex) {
- gm->full_duplex = full_duplex;
- gmac_set_duplex_mode(gm, gm->full_duplex);
- restart = 1;
- }
- if (restart)
- gmac_start_dma(gm);
- } else if (!(phy_status & MII_SR_LKS)) {
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: Link down !n", gm->dev->name);
- #endif
- }
- }
- }
- #ifdef CONFIG_PMAC_PBOOK
- /* Power management: stop PHY chip for suspend mode
- *
- * TODO: This will have to be modified is WOL is to be supported.
- */
- static void
- gmac_suspend(struct gmac* gm)
- {
- int data, timeout;
- unsigned long flags;
-
- gm->sleeping = 1;
- netif_device_detach(gm->dev);
- spin_lock_irqsave(&gm->lock, flags);
- if (gm->opened) {
- disable_irq(gm->dev->irq);
- /* Stop polling PHY */
- mii_poll_stop(gm);
- }
- /* Mask out all chips interrupts */
- GM_OUT(GM_IRQ_MASK, 0xffffffff);
- spin_unlock_irqrestore(&gm->lock, flags);
-
- if (gm->opened) {
- int i;
- /* Empty Tx ring of any remaining gremlins */
- gmac_tx_cleanup(gm->dev, 1);
-
- /* Empty Rx ring of any remaining gremlins */
- for (i = 0; i < NRX; ++i) {
- if (gm->rx_buff[i] != 0) {
- dev_kfree_skb_irq(gm->rx_buff[i]);
- gm->rx_buff[i] = 0;
- }
- }
- }
- /* Clear interrupts on 5201 */
- if (gm->phy_type == PHY_B5201 || gm->phy_type == PHY_B5221)
- mii_write(gm, gm->phy_addr, MII_BCM5201_INTERRUPT, 0);
-
- /* Drive MDIO high */
- GM_OUT(GM_MIF_CFG, 0);
-
- /* Unchanged, don't ask me why */
- data = mii_read(gm, gm->phy_addr, MII_ANLPA);
- mii_write(gm, gm->phy_addr, MII_ANLPA, data);
-
- /* Stop everything */
- GM_OUT(GM_MAC_RX_CONFIG, 0);
- GM_OUT(GM_MAC_TX_CONFIG, 0);
- GM_OUT(GM_MAC_XIF_CONFIG, 0);
- GM_OUT(GM_TX_CONF, 0);
- GM_OUT(GM_RX_CONF, 0);
-
- /* Set MAC in reset state */
- GM_OUT(GM_RESET, GM_RESET_TX | GM_RESET_RX);
- for (timeout = 100; timeout > 0; --timeout) {
- mdelay(10);
- if ((GM_IN(GM_RESET) & (GM_RESET_TX | GM_RESET_RX)) == 0)
- break;
- }
- GM_OUT(GM_MAC_TX_RESET, GM_MAC_TX_RESET_NOW);
- GM_OUT(GM_MAC_RX_RESET, GM_MAC_RX_RESET_NOW);
- /* Superisolate PHY */
- if (gm->phy_type == PHY_B5201 || gm->phy_type == PHY_B5221)
- mii_write(gm, gm->phy_addr, MII_BCM5201_MULTIPHY,
- MII_BCM5201_MULTIPHY_SUPERISOLATE);
- /* Put MDIO in sane electric state. According to an obscure
- * Apple comment, not doing so may let them drive some current
- * during sleep and possibly damage BCM PHYs.
- */
- GM_OUT(GM_MIF_CFG, GM_MIF_CFGBB);
- GM_OUT(GM_MIF_BB_CLOCK, 0);
- GM_OUT(GM_MIF_BB_DATA, 0);
- GM_OUT(GM_MIF_BB_OUT_ENABLE, 0);
- GM_OUT(GM_MAC_XIF_CONFIG,
- GM_MAC_XIF_CONF_GMII_MODE|GM_MAC_XIF_CONF_MII_INT_LOOP);
- (void)GM_IN(GM_MAC_XIF_CONFIG);
-
- /* Unclock the GMAC chip */
- gmac_set_power(gm, 0);
- }
- static void
- gmac_resume(struct gmac *gm)
- {
- int data;
- if (gmac_powerup_and_reset(gm->dev)) {
- printk(KERN_ERR "%s: Couldn't revive gmac ethernet !n", gm->dev->name);
- return;
- }
- gm->sleeping = 0;
-
- if (gm->opened) {
- /* Create fresh rings */
- gmac_init_rings(gm, 1);
- /* re-initialize the MAC */
- gmac_mac_init(gm, gm->dev->dev_addr);
- /* re-initialize the multicast tables & promisc mode if any */
- gmac_set_multicast(gm->dev);
- }
- /* Early enable Tx and Rx so that we are clocked */
- GM_BIS(GM_TX_CONF, GM_TX_CONF_DMA_EN);
- mdelay(20);
- GM_BIS(GM_RX_CONF, GM_RX_CONF_DMA_EN);
- mdelay(20);
- GM_BIS(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_ENABLE);
- mdelay(20);
- GM_BIS(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_ENABLE);
- mdelay(20);
- if (gm->phy_type == PHY_B5201 || gm->phy_type == PHY_B5221) {
- data = mii_read(gm, gm->phy_addr, MII_BCM5201_MULTIPHY);
- mii_write(gm, gm->phy_addr, MII_BCM5201_MULTIPHY,
- data & ~MII_BCM5201_MULTIPHY_SUPERISOLATE);
- }
- mdelay(1);
- if (gm->opened) {
- /* restart polling PHY */
- mii_interrupt(gm);
- /* restart DMA operations */
- gmac_start_dma(gm);
- netif_device_attach(gm->dev);
- enable_irq(gm->dev->irq);
- } else {
- /* Driver not opened, just leave things off. Note that
- * we could be smart and superisolate the PHY when the
- * driver is closed, but I won't do that unless I have
- * a better understanding of some electrical issues with
- * this PHY chip --BenH
- */
- GM_OUT(GM_MAC_RX_CONFIG, 0);
- GM_OUT(GM_MAC_TX_CONFIG, 0);
- GM_OUT(GM_MAC_XIF_CONFIG, 0);
- GM_OUT(GM_TX_CONF, 0);
- GM_OUT(GM_RX_CONF, 0);
- }
- }
- #endif
- static int
- mii_do_reset_phy(struct gmac *gm, int phy_addr)
- {
- int mii_control, timeout;
-
- mii_control = mii_read(gm, phy_addr, MII_CR);
- mii_write(gm, phy_addr, MII_CR, mii_control | MII_CR_RST);
- mdelay(10);
- for (timeout = 100; timeout > 0; --timeout) {
- mii_control = mii_read(gm, phy_addr, MII_CR);
- if (mii_control == -1) {
- printk(KERN_ERR "%s PHY died after reset !n",
- gm->dev->name);
- return 1;
- }
- if ((mii_control & MII_CR_RST) == 0)
- break;
- mdelay(10);
- }
- if (mii_control & MII_CR_RST) {
- printk(KERN_ERR "%s PHY reset timeout !n", gm->dev->name);
- return 1;
- }
- mii_write(gm, phy_addr, MII_CR, mii_control & ~MII_CR_ISOL);
- return 0;
- }
- /* Here's a bunch of configuration routines for
- * Broadcom PHYs used on various Mac models. Unfortunately,
- * except for the 5201, Broadcom never sent me any documentation,
- * so this is from my understanding of Apple's Open Firmware
- * drivers and Darwin's implementation
- */
-
- static void
- mii_init_BCM5400(struct gmac *gm)
- {
- int data;
- /* Configure for gigabit full duplex */
- data = mii_read(gm, gm->phy_addr, MII_BCM5400_AUXCONTROL);
- data |= MII_BCM5400_AUXCONTROL_PWR10BASET;
- mii_write(gm, gm->phy_addr, MII_BCM5400_AUXCONTROL, data);
-
- data = mii_read(gm, gm->phy_addr, MII_BCM5400_GB_CONTROL);
- data |= MII_BCM5400_GB_CONTROL_FULLDUPLEXCAP;
- mii_write(gm, gm->phy_addr, MII_BCM5400_GB_CONTROL, data);
-
- mdelay(10);
- /* Reset and configure cascaded 10/100 PHY */
- mii_do_reset_phy(gm, 0x1f);
-
- data = mii_read(gm, 0x1f, MII_BCM5201_MULTIPHY);
- data |= MII_BCM5201_MULTIPHY_SERIALMODE;
- mii_write(gm, 0x1f, MII_BCM5201_MULTIPHY, data);
- data = mii_read(gm, gm->phy_addr, MII_BCM5400_AUXCONTROL);
- data &= ~MII_BCM5400_AUXCONTROL_PWR10BASET;
- mii_write(gm, gm->phy_addr, MII_BCM5400_AUXCONTROL, data);
- }
- static void
- mii_init_BCM5401(struct gmac *gm)
- {
- int data;
- int rev;
- rev = mii_read(gm, gm->phy_addr, MII_ID1) & 0x000f;
- if (rev == 0 || rev == 3) {
- /* Some revisions of 5401 appear to need this
- * initialisation sequence to disable, according
- * to OF, "tap power management"
- *
- * WARNING ! OF and Darwin don't agree on the
- * register addresses. OF seem to interpret the
- * register numbers below as decimal
- */
- mii_write(gm, gm->phy_addr, 0x18, 0x0c20);
- mii_write(gm, gm->phy_addr, 0x17, 0x0012);
- mii_write(gm, gm->phy_addr, 0x15, 0x1804);
- mii_write(gm, gm->phy_addr, 0x17, 0x0013);
- mii_write(gm, gm->phy_addr, 0x15, 0x1204);
- mii_write(gm, gm->phy_addr, 0x17, 0x8006);
- mii_write(gm, gm->phy_addr, 0x15, 0x0132);
- mii_write(gm, gm->phy_addr, 0x17, 0x8006);
- mii_write(gm, gm->phy_addr, 0x15, 0x0232);
- mii_write(gm, gm->phy_addr, 0x17, 0x201f);
- mii_write(gm, gm->phy_addr, 0x15, 0x0a20);
- }
-
- /* Configure for gigabit full duplex */
- data = mii_read(gm, gm->phy_addr, MII_BCM5400_GB_CONTROL);
- data |= MII_BCM5400_GB_CONTROL_FULLDUPLEXCAP;
- mii_write(gm, gm->phy_addr, MII_BCM5400_GB_CONTROL, data);
- mdelay(10);
- /* Reset and configure cascaded 10/100 PHY */
- mii_do_reset_phy(gm, 0x1f);
-
- data = mii_read(gm, 0x1f, MII_BCM5201_MULTIPHY);
- data |= MII_BCM5201_MULTIPHY_SERIALMODE;
- mii_write(gm, 0x1f, MII_BCM5201_MULTIPHY, data);
- }
- static void
- mii_init_BCM5411(struct gmac *gm)
- {
- int data;
- /* Here's some more Apple black magic to setup
- * some voltage stuffs.
- */
- mii_write(gm, gm->phy_addr, 0x1c, 0x8c23);
- mii_write(gm, gm->phy_addr, 0x1c, 0x8ca3);
- mii_write(gm, gm->phy_addr, 0x1c, 0x8c23);
- /* Here, Apple seems to want to reset it, do
- * it as well
- */
- mii_write(gm, gm->phy_addr, MII_CR, MII_CR_RST);
- /* Start autoneg */
- mii_write(gm, gm->phy_addr, MII_CR,
- MII_CR_ASSE|MII_CR_FDM| /* Autospeed, full duplex */
- MII_CR_RAN|
- MII_CR_SPEEDSEL2 /* chip specific, gigabit enable ? */);
- data = mii_read(gm, gm->phy_addr, MII_BCM5400_GB_CONTROL);
- data |= MII_BCM5400_GB_CONTROL_FULLDUPLEXCAP;
- mii_write(gm, gm->phy_addr, MII_BCM5400_GB_CONTROL, data);
- }
- static int
- mii_lookup_and_reset(struct gmac *gm)
- {
- int i, mii_status, mii_control;
- gm->phy_addr = -1;
- gm->phy_type = PHY_UNKNOWN;
- /* Hard reset the PHY */
- pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gm->of_node, 0, 0);
-
- /* Find the PHY */
- for(i=0; i<=31; i++) {
- mii_control = mii_read(gm, i, MII_CR);
- mii_status = mii_read(gm, i, MII_SR);
- if (mii_control != -1 && mii_status != -1 &&
- (mii_control != 0xffff || mii_status != 0xffff))
- break;
- }
- gm->phy_addr = i;
- if (gm->phy_addr > 31)
- return 0;
- /* Reset it */
- if (mii_do_reset_phy(gm, gm->phy_addr))
- goto fail;
-
- /* Read the PHY ID */
- gm->phy_id = (mii_read(gm, gm->phy_addr, MII_ID0) << 16) |
- mii_read(gm, gm->phy_addr, MII_ID1);
- #ifdef DEBUG_PHY
- printk(KERN_INFO "%s: PHY ID: 0x%08xn", gm->dev->name, gm->phy_id);
- #endif
- if ((gm->phy_id & MII_BCM5400_MASK) == MII_BCM5400_ID) {
- gm->phy_type = PHY_B5400;
- printk(KERN_INFO "%s: Found Broadcom BCM5400 PHY (Gigabit)n",
- gm->dev->name);
- mii_init_BCM5400(gm);
- } else if ((gm->phy_id & MII_BCM5401_MASK) == MII_BCM5401_ID) {
- gm->phy_type = PHY_B5401;
- printk(KERN_INFO "%s: Found Broadcom BCM5401 PHY (Gigabit)n",
- gm->dev->name);
- mii_init_BCM5401(gm);
- } else if ((gm->phy_id & MII_BCM5411_MASK) == MII_BCM5411_ID) {
- gm->phy_type = PHY_B5411;
- printk(KERN_INFO "%s: Found Broadcom BCM5411 PHY (Gigabit)n",
- gm->dev->name);
- mii_init_BCM5411(gm);
- } else if ((gm->phy_id & MII_BCM5201_MASK) == MII_BCM5201_ID) {
- gm->phy_type = PHY_B5201;
- printk(KERN_INFO "%s: Found Broadcom BCM5201 PHYn", gm->dev->name);
- } else if ((gm->phy_id & MII_BCM5221_MASK) == MII_BCM5221_ID) {
- gm->phy_type = PHY_B5221;
- printk(KERN_INFO "%s: Found Broadcom BCM5221 PHYn", gm->dev->name);
- } else if ((gm->phy_id & MII_LXT971_MASK) == MII_LXT971_ID) {
- gm->phy_type = PHY_LXT971;
- printk(KERN_INFO "%s: Found LevelOne LX971 PHYn", gm->dev->name);
- } else {
- printk(KERN_WARNING "%s: Warning ! Unknown PHY ID 0x%08x, using generic mode...n",
- gm->dev->name, gm->phy_id);
- }
- return 1;
-
- fail:
- gm->phy_addr = -1;
- return 0;
- }
- /*
- * Setup the PHY autonegociation parameters
- *
- * Code to force the PHY duplex mode and speed should be
- * added here
- */
- static void
- mii_setup_phy(struct gmac *gm)
- {
- int data;
-
- /* Stop auto-negociation */
- data = mii_read(gm, gm->phy_addr, MII_CR);
- mii_write(gm, gm->phy_addr, MII_CR, data & ~MII_CR_ASSE);
- /* Set advertisement to 10/100 and Half/Full duplex
- * (full capabilities) */
- data = mii_read(gm, gm->phy_addr, MII_ANA);
- data |= MII_ANA_TXAM | MII_ANA_FDAM | MII_ANA_10M;
- mii_write(gm, gm->phy_addr, MII_ANA, data);
-
- /* Restart auto-negociation */
- data = mii_read(gm, gm->phy_addr, MII_CR);
- data |= MII_CR_ASSE;
- mii_write(gm, gm->phy_addr, MII_CR, data);
- data |= MII_CR_RAN;
- mii_write(gm, gm->phy_addr, MII_CR, data);
- }
- /*
- * Turn On/Off the gmac cell inside Uni-N
- *
- * ToDo: Add code to support powering down of the PHY.
- */
- static void
- gmac_set_power(struct gmac *gm, int power_up)
- {
- if (power_up) {
- pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gm->of_node, 0, 1);
- if (gm->pci_devfn != 0xff) {
- u16 cmd;
-
- /*
- * Make sure PCI is correctly configured
- *
- * We use old pci_bios versions of the function since, by
- * default, gmac is not powered up, and so will be absent
- * from the kernel initial PCI lookup.
- *
- * Should be replaced by 2.4 new PCI mecanisms and really
- * regiser the device.
- */
- pcibios_read_config_word(gm->pci_bus, gm->pci_devfn,
- PCI_COMMAND, &cmd);
- cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
- pcibios_write_config_word(gm->pci_bus, gm->pci_devfn,
- PCI_COMMAND, cmd);
- pcibios_write_config_byte(gm->pci_bus, gm->pci_devfn,
- PCI_LATENCY_TIMER, 16);
- pcibios_write_config_byte(gm->pci_bus, gm->pci_devfn,
- PCI_CACHE_LINE_SIZE, 8);
- }
- } else {
- pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gm->of_node, 0, 0);
- }
- }
- /*
- * Makes sure the GMAC cell is powered up, and reset it
- */
- static int
- gmac_powerup_and_reset(struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- int timeout;
-
- /* turn on GB clock */
- gmac_set_power(gm, 1);
- /* Perform a software reset */
- GM_OUT(GM_RESET, GM_RESET_TX | GM_RESET_RX);
- for (timeout = 100; timeout > 0; --timeout) {
- mdelay(10);
- if ((GM_IN(GM_RESET) & (GM_RESET_TX | GM_RESET_RX)) == 0) {
- /* Mask out all chips interrupts */
- GM_OUT(GM_IRQ_MASK, 0xffffffff);
- GM_OUT(GM_MAC_TX_RESET, GM_MAC_TX_RESET_NOW);
- GM_OUT(GM_MAC_RX_RESET, GM_MAC_RX_RESET_NOW);
- return 0;
- }
- }
- printk(KERN_ERR "%s reset failed!n", dev->name);
- gmac_set_power(gm, 0);
- gm->phy_type = 0;
- return -1;
- }
- /*
- * Set the MAC duplex mode.
- *
- * Side effect: stops Tx MAC
- */
- static void
- gmac_set_duplex_mode(struct gmac *gm, int full_duplex)
- {
- /* Stop Tx MAC */
- GM_BIC(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_ENABLE);
- while(GM_IN(GM_MAC_TX_CONFIG) & GM_MAC_TX_CONF_ENABLE)
- ;
-
- if (full_duplex) {
- GM_BIS(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_IGNORE_CARRIER
- | GM_MAC_TX_CONF_IGNORE_COLL);
- GM_BIC(GM_MAC_XIF_CONFIG, GM_MAC_XIF_CONF_DISABLE_ECHO);
- } else {
- GM_BIC(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_IGNORE_CARRIER
- | GM_MAC_TX_CONF_IGNORE_COLL);
- GM_BIS(GM_MAC_XIF_CONFIG, GM_MAC_XIF_CONF_DISABLE_ECHO);
- }
- }
- /* Set the MAC gigabit mode. Side effect: stops Tx MAC */
- static void
- gmac_set_gigabit_mode(struct gmac *gm, int gigabit)
- {
- /* Stop Tx MAC */
- GM_BIC(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_ENABLE);
- while(GM_IN(GM_MAC_TX_CONFIG) & GM_MAC_TX_CONF_ENABLE)
- ;
-
- if (gigabit) {
- GM_BIS(GM_MAC_XIF_CONFIG, GM_MAC_XIF_CONF_GMII_MODE);
- } else {
- GM_BIC(GM_MAC_XIF_CONFIG, GM_MAC_XIF_CONF_GMII_MODE);
- }
- }
- /*
- * Initialize a bunch of registers to put the chip into a known
- * and hopefully happy state
- */
- static void
- gmac_mac_init(struct gmac *gm, unsigned char *mac_addr)
- {
- int i, fifo_size;
- /* Set random seed to low bits of MAC address */
- GM_OUT(GM_MAC_RANDOM_SEED, mac_addr[5] | (mac_addr[4] << 8));
-
- /* Configure the data path mode to MII/GII */
- GM_OUT(GM_PCS_DATAPATH_MODE, GM_PCS_DATAPATH_MII);
-
- /* Configure XIF to MII mode. Full duplex led is set
- * by Apple, so...
- */
- GM_OUT(GM_MAC_XIF_CONFIG, GM_MAC_XIF_CONF_TX_MII_OUT_EN
- | GM_MAC_XIF_CONF_FULL_DPLX_LED);
- /* Mask out all MAC interrupts */
- GM_OUT(GM_MAC_TX_MASK, 0xffff);
- GM_OUT(GM_MAC_RX_MASK, 0xffff);
- GM_OUT(GM_MAC_CTRLSTAT_MASK, 0xff);
-
- /* Setup bits of MAC */
- GM_OUT(GM_MAC_SND_PAUSE, GM_MAC_SND_PAUSE_DEFAULT);
- GM_OUT(GM_MAC_CTRL_CONFIG, GM_MAC_CTRL_CONF_RCV_PAUSE_EN);
-
- /* Configure GEM DMA */
- GM_OUT(GM_GCONF, GM_GCONF_BURST_SZ |
- (31 << GM_GCONF_TXDMA_LIMIT_SHIFT) |
- (31 << GM_GCONF_RXDMA_LIMIT_SHIFT));
- GM_OUT(GM_TX_CONF,
- (GM_TX_CONF_FIFO_THR_DEFAULT << GM_TX_CONF_FIFO_THR_SHIFT) |
- NTX_CONF);
- /* 34 byte offset for checksum computation. This works because ip_input() will clear out
- * the skb->csum and skb->ip_summed fields and recompute the csum if IP options are
- * present in the header. 34 == (ethernet header len) + sizeof(struct iphdr)
- */
- GM_OUT(GM_RX_CONF,
- (RX_OFFSET << GM_RX_CONF_FBYTE_OFF_SHIFT) |
- (0x22 << GM_RX_CONF_CHK_START_SHIFT) |
- (GM_RX_CONF_DMA_THR_DEFAULT << GM_RX_CONF_DMA_THR_SHIFT) |
- NRX_CONF);
- /* Configure other bits of MAC */
- GM_OUT(GM_MAC_INTR_PKT_GAP0, GM_MAC_INTR_PKT_GAP0_DEFAULT);
- GM_OUT(GM_MAC_INTR_PKT_GAP1, GM_MAC_INTR_PKT_GAP1_DEFAULT);
- GM_OUT(GM_MAC_INTR_PKT_GAP2, GM_MAC_INTR_PKT_GAP2_DEFAULT);
- GM_OUT(GM_MAC_MIN_FRAME_SIZE, GM_MAC_MIN_FRAME_SIZE_DEFAULT);
- GM_OUT(GM_MAC_MAX_FRAME_SIZE, GM_MAC_MAX_FRAME_SIZE_DEFAULT);
- GM_OUT(GM_MAC_PREAMBLE_LEN, GM_MAC_PREAMBLE_LEN_DEFAULT);
- GM_OUT(GM_MAC_JAM_SIZE, GM_MAC_JAM_SIZE_DEFAULT);
- GM_OUT(GM_MAC_ATTEMPT_LIMIT, GM_MAC_ATTEMPT_LIMIT_DEFAULT);
- GM_OUT(GM_MAC_SLOT_TIME, GM_MAC_SLOT_TIME_DEFAULT);
- GM_OUT(GM_MAC_CONTROL_TYPE, GM_MAC_CONTROL_TYPE_DEFAULT);
-
- /* Setup MAC addresses, clear filters, clear hash table */
- GM_OUT(GM_MAC_ADDR_NORMAL0, (mac_addr[4] << 8) + mac_addr[5]);
- GM_OUT(GM_MAC_ADDR_NORMAL1, (mac_addr[2] << 8) + mac_addr[3]);
- GM_OUT(GM_MAC_ADDR_NORMAL2, (mac_addr[0] << 8) + mac_addr[1]);
- GM_OUT(GM_MAC_ADDR_ALT0, 0);
- GM_OUT(GM_MAC_ADDR_ALT1, 0);
- GM_OUT(GM_MAC_ADDR_ALT2, 0);
- GM_OUT(GM_MAC_ADDR_CTRL0, 0x0001);
- GM_OUT(GM_MAC_ADDR_CTRL1, 0xc200);
- GM_OUT(GM_MAC_ADDR_CTRL2, 0x0180);
- GM_OUT(GM_MAC_ADDR_FILTER0, 0);
- GM_OUT(GM_MAC_ADDR_FILTER1, 0);
- GM_OUT(GM_MAC_ADDR_FILTER2, 0);
- GM_OUT(GM_MAC_ADDR_FILTER_MASK1_2, 0);
- GM_OUT(GM_MAC_ADDR_FILTER_MASK0, 0);
- for (i = 0; i < 27; ++i)
- GM_OUT(GM_MAC_ADDR_FILTER_HASH0 + i, 0);
-
- /* Clear stat counters */
- GM_OUT(GM_MAC_COLLISION_CTR, 0);
- GM_OUT(GM_MAC_FIRST_COLLISION_CTR, 0);
- GM_OUT(GM_MAC_EXCS_COLLISION_CTR, 0);
- GM_OUT(GM_MAC_LATE_COLLISION_CTR, 0);
- GM_OUT(GM_MAC_DEFER_TIMER_COUNTER, 0);
- GM_OUT(GM_MAC_PEAK_ATTEMPTS, 0);
- GM_OUT(GM_MAC_RX_FRAME_CTR, 0);
- GM_OUT(GM_MAC_RX_LEN_ERR_CTR, 0);
- GM_OUT(GM_MAC_RX_ALIGN_ERR_CTR, 0);
- GM_OUT(GM_MAC_RX_CRC_ERR_CTR, 0);
- GM_OUT(GM_MAC_RX_CODE_VIOLATION_CTR, 0);
-
- /* default to half duplex */
- GM_OUT(GM_MAC_TX_CONFIG, 0);
- GM_OUT(GM_MAC_RX_CONFIG, 0);
- gmac_set_duplex_mode(gm, gm->full_duplex);
-
- /* Setup pause thresholds */
- fifo_size = GM_IN(GM_RX_FIFO_SIZE);
- GM_OUT(GM_RX_PTH,
- ((fifo_size - ((GM_MAC_MAX_FRAME_SIZE_ALIGN + 8) * 2 / GM_RX_PTH_UNITS))
- << GM_RX_PTH_OFF_SHIFT) |
- ((fifo_size - ((GM_MAC_MAX_FRAME_SIZE_ALIGN + 8) * 3 / GM_RX_PTH_UNITS))
- << GM_RX_PTH_ON_SHIFT));
-
- /* Setup interrupt blanking */
- if (GM_IN(GM_BIF_CFG) & GM_BIF_CFG_M66EN)
- GM_OUT(GM_RX_BLANK, (5 << GM_RX_BLANK_INTR_PACKETS_SHIFT)
- | (8 << GM_RX_BLANK_INTR_TIME_SHIFT));
- else
- GM_OUT(GM_RX_BLANK, (5 << GM_RX_BLANK_INTR_PACKETS_SHIFT)
- | (4 << GM_RX_BLANK_INTR_TIME_SHIFT));
- }
- /*
- * Fill the Rx and Tx rings with good initial values, alloc
- * fresh Rx skb's.
- */
- static void
- gmac_init_rings(struct gmac *gm, int from_irq)
- {
- int i;
- struct sk_buff *skb;
- unsigned char *data;
- struct gmac_dma_desc *ring;
- int gfp_flags = GFP_KERNEL;
- if (from_irq || in_interrupt())
- gfp_flags = GFP_ATOMIC;
- /* init rx ring */
- ring = (struct gmac_dma_desc *) gm->rxring;
- memset(ring, 0, NRX * sizeof(struct gmac_dma_desc));
- for (i = 0; i < NRX; ++i, ++ring) {
- data = dummy_buf;
- gm->rx_buff[i] = skb = gmac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
- if (skb != 0) {
- skb->dev = gm->dev;
- skb_put(skb, ETH_FRAME_LEN + RX_OFFSET);
- skb_reserve(skb, RX_OFFSET);
- data = skb->data - RX_OFFSET;
- }
- st_le32(&ring->lo_addr, virt_to_bus(data));
- st_le32(&ring->size, RX_SZ_OWN | ((RX_BUF_ALLOC_SIZE-RX_OFFSET) << RX_SZ_SHIFT));
- }
- /* init tx ring */
- ring = (struct gmac_dma_desc *) gm->txring;
- memset(ring, 0, NTX * sizeof(struct gmac_dma_desc));
- gm->next_rx = 0;
- gm->next_tx = 0;
- gm->tx_gone = 0;
- /* set pointers in chip */
- mb();
- GM_OUT(GM_RX_DESC_HI, 0);
- GM_OUT(GM_RX_DESC_LO, virt_to_bus(gm->rxring));
- GM_OUT(GM_TX_DESC_HI, 0);
- GM_OUT(GM_TX_DESC_LO, virt_to_bus(gm->txring));
- }
- /*
- * Start the Tx and Rx DMA engines and enable interrupts
- *
- * Note: The various mdelay(20); come from Darwin implentation. Some
- * tests (doc ?) are needed to replace those with something more intrusive.
- */
- static void
- gmac_start_dma(struct gmac *gm)
- {
- /* Enable Tx and Rx */
- GM_BIS(GM_TX_CONF, GM_TX_CONF_DMA_EN);
- mdelay(20);
- GM_BIS(GM_RX_CONF, GM_RX_CONF_DMA_EN);
- mdelay(20);
- GM_BIS(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_ENABLE);
- mdelay(20);
- GM_BIS(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_ENABLE);
- mdelay(20);
- /* Kick the receiver and enable interrupts */
- GM_OUT(GM_RX_KICK, NRX);
- GM_BIC(GM_IRQ_MASK, GM_IRQ_TX_INT_ME |
- GM_IRQ_TX_ALL |
- GM_IRQ_RX_DONE |
- GM_IRQ_RX_TAG_ERR |
- GM_IRQ_MAC_RX |
- GM_IRQ_MIF |
- GM_IRQ_BUS_ERROR);
- }
- /*
- * Stop the Tx and Rx DMA engines after disabling interrupts
- *
- * Note: The various mdelay(20); come from Darwin implentation. Some
- * tests (doc ?) are needed to replace those with something more intrusive.
- */
- static void
- gmac_stop_dma(struct gmac *gm)
- {
- /* disable interrupts */
- GM_OUT(GM_IRQ_MASK, 0xffffffff);
- /* Enable Tx and Rx */
- GM_BIC(GM_TX_CONF, GM_TX_CONF_DMA_EN);
- mdelay(20);
- GM_BIC(GM_RX_CONF, GM_RX_CONF_DMA_EN);
- mdelay(20);
- GM_BIC(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_ENABLE);
- mdelay(20);
- GM_BIC(GM_MAC_TX_CONFIG, GM_MAC_TX_CONF_ENABLE);
- mdelay(20);
- }
- /*
- * Configure promisc mode and setup multicast hash table
- * filter
- */
- #define CRC_POLY 0xedb88320
- static void
- gmac_set_multicast(struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- struct dev_mc_list *dmi = dev->mc_list;
- int i,j,k,b;
- unsigned long crc;
- int multicast_hash = 0;
- int multicast_all = 0;
- int promisc = 0;
- if (gm->sleeping)
- return;
- /* Lock out others. */
- netif_stop_queue(dev);
- if (dev->flags & IFF_PROMISC)
- promisc = 1;
- else if ((dev->flags & IFF_ALLMULTI) /* || (dev->mc_count > XXX) */) {
- multicast_all = 1;
- } else {
- u16 hash_table[16];
- for(i = 0; i < 16; i++)
- hash_table[i] = 0;
- for (i = 0; i < dev->mc_count; i++) {
- crc = ~0;
- for (j = 0; j < 6; ++j) {
- b = dmi->dmi_addr[j];
- for (k = 0; k < 8; ++k) {
- if ((crc ^ b) & 1)
- crc = (crc >> 1) ^ CRC_POLY;
- else
- crc >>= 1;
- b >>= 1;
- }
- }
- j = crc >> 24; /* bit number in multicast_filter */
- hash_table[j >> 4] |= 1 << (15 - (j & 0xf));
- dmi = dmi->next;
- }
- for (i = 0; i < 16; i++)
- GM_OUT(GM_MAC_ADDR_FILTER_HASH0 + (i*4), hash_table[i]);
- GM_BIS(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_HASH_ENABLE);
- multicast_hash = 1;
- }
- if (promisc)
- GM_BIS(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_RX_ALL);
- else
- GM_BIC(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_RX_ALL);
- if (multicast_hash)
- GM_BIS(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_HASH_ENABLE);
- else
- GM_BIC(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_HASH_ENABLE);
- if (multicast_all)
- GM_BIS(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_RX_ALL_MULTI);
- else
- GM_BIC(GM_MAC_RX_CONFIG, GM_MAC_RX_CONF_RX_ALL_MULTI);
-
- /* Let us get going again. */
- netif_wake_queue(dev);
- }
- /*
- * Open the interface
- */
- static int
- gmac_open(struct net_device *dev)
- {
- int ret;
- struct gmac *gm = (struct gmac *) dev->priv;
- /* Power up and reset chip */
- if (gmac_powerup_and_reset(dev))
- return -EIO;
- /* Get our interrupt */
- ret = request_irq(dev->irq, gmac_interrupt, 0, dev->name, dev);
- if (ret) {
- printk(KERN_ERR "%s can't get irq %dn", dev->name, dev->irq);
- return ret;
- }
- gm->full_duplex = 0;
- gm->phy_status = 0;
-
- /* Find a PHY */
- if (!mii_lookup_and_reset(gm))
- printk(KERN_WARNING "%s WARNING ! Can't find PHYn", dev->name);
- /* Configure the PHY */
- mii_setup_phy(gm);
-
- /* Initialize the descriptor rings */
- gmac_init_rings(gm, 0);
- /* Initialize the MAC */
- gmac_mac_init(gm, dev->dev_addr);
-
- /* Initialize the multicast tables & promisc mode if any */
- gmac_set_multicast(dev);
-
- /*
- * Check out PHY status and start auto-poll
- *
- * Note: do this before enabling interrutps
- */
- mii_interrupt(gm);
- /* Start the chip */
- gmac_start_dma(gm);
- gm->opened = 1;
- return 0;
- }
- /*
- * Close the interface
- */
- static int
- gmac_close(struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- int i;
- gm->opened = 0;
- /* Stop chip and interrupts */
- gmac_stop_dma(gm);
- /* Stop polling PHY */
- mii_poll_stop(gm);
- /* Free interrupt */
- free_irq(dev->irq, dev);
-
- /* Shut down chip */
- gmac_set_power(gm, 0);
- gm->phy_type = 0;
- /* Empty rings of any remaining gremlins */
- for (i = 0; i < NRX; ++i) {
- if (gm->rx_buff[i] != 0) {
- dev_kfree_skb(gm->rx_buff[i]);
- gm->rx_buff[i] = 0;
- }
- }
- for (i = 0; i < NTX; ++i) {
- if (gm->tx_buff[i] != 0) {
- dev_kfree_skb(gm->tx_buff[i]);
- gm->tx_buff[i] = 0;
- }
- }
- return 0;
- }
- #ifdef CONFIG_PMAC_PBOOK
- int
- gmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
- {
- struct gmac *gm;
-
- /* XXX should handle more than one */
- if (gmacs == NULL)
- return PBOOK_SLEEP_OK;
- gm = (struct gmac *) gmacs->priv;
- if (!gm->opened)
- return PBOOK_SLEEP_OK;
-
- switch (when) {
- case PBOOK_SLEEP_REQUEST:
- break;
- case PBOOK_SLEEP_REJECT:
- break;
- case PBOOK_SLEEP_NOW:
- gmac_suspend(gm);
- break;
- case PBOOK_WAKE:
- gmac_resume(gm);
- break;
- }
- return PBOOK_SLEEP_OK;
- }
- #endif /* CONFIG_PMAC_PBOOK */
- /*
- * Handle a transmit timeout
- */
- static void
- gmac_tx_timeout(struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- int i, timeout;
- unsigned long flags;
- if (gm->sleeping)
- return;
- printk (KERN_ERR "%s: transmit timed out, resettingn", dev->name);
- spin_lock_irqsave(&gm->lock, flags);
- /* Stop chip */
- gmac_stop_dma(gm);
- /* Empty Tx ring of any remaining gremlins */
- gmac_tx_cleanup(dev, 1);
- /* Empty Rx ring of any remaining gremlins */
- for (i = 0; i < NRX; ++i) {
- if (gm->rx_buff[i] != 0) {
- dev_kfree_skb_irq(gm->rx_buff[i]);
- gm->rx_buff[i] = 0;
- }
- }
- /* Perform a software reset */
- GM_OUT(GM_RESET, GM_RESET_TX | GM_RESET_RX);
- for (timeout = 100; timeout > 0; --timeout) {
- mdelay(10);
- if ((GM_IN(GM_RESET) & (GM_RESET_TX | GM_RESET_RX)) == 0) {
- /* Mask out all chips interrupts */
- GM_OUT(GM_IRQ_MASK, 0xffffffff);
- GM_OUT(GM_MAC_TX_RESET, GM_MAC_TX_RESET_NOW);
- GM_OUT(GM_MAC_RX_RESET, GM_MAC_RX_RESET_NOW);
- break;
- }
- }
- if (!timeout)
- printk(KERN_ERR "%s reset chip failed !n", dev->name);
- /* Create fresh rings */
- gmac_init_rings(gm, 1);
- /* re-initialize the MAC */
- gmac_mac_init(gm, dev->dev_addr);
- /* re-initialize the multicast tables & promisc mode if any */
- gmac_set_multicast(dev);
- /* Restart PHY auto-poll */
- mii_interrupt(gm);
- /* Restart chip */
- gmac_start_dma(gm);
-
- spin_unlock_irqrestore(&gm->lock, flags);
- netif_wake_queue(dev);
- }
- /*
- * Add a packet to the transmit ring
- */
- static int
- gmac_xmit_start(struct sk_buff *skb, struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- volatile struct gmac_dma_desc *dp;
- unsigned long flags;
- int i;
- if (gm->sleeping)
- return 1;
-
- spin_lock_irqsave(&gm->lock, flags);
- i = gm->next_tx;
- if (gm->tx_buff[i] != 0) {
- /*
- * Buffer is full, can't send this packet at the moment
- *
- * Can this ever happen in 2.4 ?
- */
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&gm->lock, flags);
- return 1;
- }
- gm->next_tx = (i + 1) & (NTX - 1);
- gm->tx_buff[i] = skb;
-
- dp = &gm->txring[i];
- /* FIXME: Interrupt on all packet for now, change this to every N packet,
- * with N to be adjusted
- */
- dp->flags = TX_FL_INTERRUPT;
- dp->hi_addr = 0;
- st_le32(&dp->lo_addr, virt_to_bus(skb->data));
- mb();
- st_le32(&dp->size, TX_SZ_SOP | TX_SZ_EOP | skb->len);
- mb();
- GM_OUT(GM_TX_KICK, gm->next_tx);
- if (gm->tx_buff[gm->next_tx] != 0)
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&gm->lock, flags);
- dev->trans_start = jiffies;
- return 0;
- }
- /*
- * Handle servicing of the transmit ring by deallocating used
- * Tx packets and restoring flow control when necessary
- */
- static void
- gmac_tx_cleanup(struct net_device *dev, int force_cleanup)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- volatile struct gmac_dma_desc *dp;
- struct sk_buff *skb;
- int gone, i;
- i = gm->tx_gone;
- /* Note: If i==gone, we empty the entire ring. This works because
- * if the ring was empty, we wouldn't have received the interrupt
- */
- do {
- gone = GM_IN(GM_TX_COMP);
- skb = gm->tx_buff[i];
- if (skb == NULL)
- break;
- dp = &gm->txring[i];
- if (force_cleanup)
- ++gm->stats.tx_errors;
- else {
- ++gm->stats.tx_packets;
- gm->stats.tx_bytes += skb->len;
- }
- gm->tx_buff[i] = NULL;
- dev_kfree_skb_irq(skb);
- if (++i >= NTX)
- i = 0;
- } while (force_cleanup || i != gone);
- gm->tx_gone = i;
- if (!force_cleanup && netif_queue_stopped(dev) &&
- (gm->tx_buff[gm->next_tx] == 0))
- netif_wake_queue(dev);
- }
- /*
- * Handle servicing of receive ring
- */
- static void
- gmac_receive(struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- int i = gm->next_rx;
- volatile struct gmac_dma_desc *dp;
- struct sk_buff *skb, *new_skb;
- int len, flags, drop, last;
- unsigned char *data;
- u16 csum;
- last = -1;
- for (;;) {
- dp = &gm->rxring[i];
- /* Buffer not yet filled, no more Rx buffers to handle */
- if (ld_le32(&dp->size) & RX_SZ_OWN)
- break;
- /* Get packet length, flags, etc... */
- len = (ld_le32(&dp->size) >> 16) & 0x7fff;
- flags = ld_le32(&dp->flags);
- skb = gm->rx_buff[i];
- drop = 0;
- new_skb = NULL;
- csum = ld_le32(&dp->size) & RX_SZ_CKSUM_MASK;
-
- /* Handle errors */
- if ((len < ETH_ZLEN)||(flags & RX_FL_CRC_ERROR)||(!skb)) {
- ++gm->stats.rx_errors;
- if (len < ETH_ZLEN)
- ++gm->stats.rx_length_errors;
- if (flags & RX_FL_CRC_ERROR)
- ++gm->stats.rx_crc_errors;
- if (!skb) {
- ++gm->stats.rx_dropped;
- skb = gmac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
- if (skb) {
- gm->rx_buff[i] = skb;
- skb->dev = dev;
- skb_put(skb, ETH_FRAME_LEN + RX_OFFSET);
- skb_reserve(skb, RX_OFFSET);
- }
- }
- drop = 1;
- } else {
- /* Large packet, alloc a new skb for the ring */
- if (len > RX_COPY_THRESHOLD) {
- new_skb = gmac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
- if(!new_skb) {
- printk(KERN_INFO "%s: Out of SKBs in Rx, packet dropped !n",
- dev->name);
- drop = 1;
- ++gm->stats.rx_dropped;
- goto finish;
- }
- gm->rx_buff[i] = new_skb;
- new_skb->dev = dev;
- skb_put(new_skb, ETH_FRAME_LEN + RX_OFFSET);
- skb_reserve(new_skb, RX_OFFSET);
- skb_trim(skb, len);
- } else {
- /* Small packet, copy it to a new small skb */
- struct sk_buff *copy_skb = dev_alloc_skb(len + RX_OFFSET);
- if(!copy_skb) {
- printk(KERN_INFO "%s: Out of SKBs in Rx, packet dropped !n",
- dev->name);
- drop = 1;
- ++gm->stats.rx_dropped;
- goto finish;
- }
- copy_skb->dev = dev;
- skb_reserve(copy_skb, RX_OFFSET);
- skb_put(copy_skb, len);
- memcpy(copy_skb->data, skb->data, len);
- new_skb = skb;
- skb = copy_skb;
- }
- }
- finish:
- /* Need to drop packet ? */
- if (drop) {
- new_skb = skb;
- skb = NULL;
- }
-
- /* Put back ring entry */
- data = new_skb ? (new_skb->data - RX_OFFSET) : dummy_buf;
- dp->hi_addr = 0;
- st_le32(&dp->lo_addr, virt_to_bus(data));
- mb();
- st_le32(&dp->size, RX_SZ_OWN | ((RX_BUF_ALLOC_SIZE-RX_OFFSET) << RX_SZ_SHIFT));
-
- /* Got Rx packet ? */
- if (skb) {
- /* Yes, baby, keep that hot ;) */
- if(!(csum ^ 0xffff))
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- else
- skb->ip_summed = CHECKSUM_NONE;
- skb->ip_summed = CHECKSUM_NONE;
- skb->protocol = eth_type_trans(skb, dev);
- gm->stats.rx_bytes += skb->len;
- netif_rx(skb);
- dev->last_rx = jiffies;
- ++gm->stats.rx_packets;
- }
-
- last = i;
- if (++i >= NRX)
- i = 0;
- }
- gm->next_rx = i;
- if (last >= 0) {
- mb();
- GM_OUT(GM_RX_KICK, last & 0xfffffffc);
- }
- }
- /*
- * Service chip interrupts
- */
- static void
- gmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *) dev_id;
- struct gmac *gm = (struct gmac *) dev->priv;
- unsigned int status;
- status = GM_IN(GM_IRQ_STATUS);
- if (status & (GM_IRQ_BUS_ERROR | GM_IRQ_MIF))
- GM_OUT(GM_IRQ_ACK, status & (GM_IRQ_BUS_ERROR | GM_IRQ_MIF));
-
- if (status & (GM_IRQ_RX_TAG_ERR | GM_IRQ_BUS_ERROR)) {
- printk(KERN_ERR "%s: IRQ Error status: 0x%08xn",
- dev->name, status);
- }
-
- if (status & GM_IRQ_MIF) {
- spin_lock(&gm->lock);
- mii_interrupt(gm);
- spin_unlock(&gm->lock);
- }
-
- if (status & GM_IRQ_RX_DONE) {
- spin_lock(&gm->lock);
- gmac_receive(dev);
- spin_unlock(&gm->lock);
- }
-
- if (status & (GM_IRQ_TX_INT_ME | GM_IRQ_TX_ALL)) {
- spin_lock(&gm->lock);
- gmac_tx_cleanup(dev, 0);
- spin_unlock(&gm->lock);
- }
- }
- /*
- * Retreive some error stats from chip and return them
- * to above layer
- */
- static struct net_device_stats *
- gmac_stats(struct net_device *dev)
- {
- struct gmac *gm = (struct gmac *) dev->priv;
- struct net_device_stats *stats = &gm->stats;
- if (gm && gm->opened && !gm->sleeping) {
- stats->rx_crc_errors += GM_IN(GM_MAC_RX_CRC_ERR_CTR);
- GM_OUT(GM_MAC_RX_CRC_ERR_CTR, 0);
- stats->rx_frame_errors += GM_IN(GM_MAC_RX_ALIGN_ERR_CTR);
- GM_OUT(GM_MAC_RX_ALIGN_ERR_CTR, 0);
- stats->rx_length_errors += GM_IN(GM_MAC_RX_LEN_ERR_CTR);
- GM_OUT(GM_MAC_RX_LEN_ERR_CTR, 0);
- stats->tx_aborted_errors += GM_IN(GM_MAC_EXCS_COLLISION_CTR);
- stats->collisions +=
- (GM_IN(GM_MAC_EXCS_COLLISION_CTR) +
- GM_IN(GM_MAC_LATE_COLLISION_CTR));
- GM_OUT(GM_MAC_EXCS_COLLISION_CTR, 0);
- GM_OUT(GM_MAC_LATE_COLLISION_CTR, 0);
- }
- return stats;
- }
- static int __init
- gmac_probe(void)
- {
- struct device_node *gmac;
- /* We bump use count during probe since get_free_page can sleep
- * which can be a race condition if module is unloaded at this
- * point.
- */
- MOD_INC_USE_COUNT;
-
- /*
- * We don't use PCI scanning on pmac since the GMAC cell is disabled
- * by default, and thus absent from kernel original PCI probing.
- */
- for (gmac = find_compatible_devices("network", "gmac"); gmac != 0;
- gmac = gmac->next)
- gmac_probe1(gmac);
- #ifdef CONFIG_PMAC_PBOOK
- if (gmacs)
- pmu_register_sleep_notifier(&gmac_sleep_notifier);
- #endif
- MOD_DEC_USE_COUNT;
- return gmacs? 0: -ENODEV;
- }
- static void
- gmac_probe1(struct device_node *gmac)
- {
- struct gmac *gm;
- unsigned long tx_descpage, rx_descpage;
- unsigned char *addr;
- struct net_device *dev;
- int i;
- if (gmac->n_addrs < 1 || gmac->n_intrs < 1) {
- printk(KERN_ERR "can't use GMAC %s: %d addrs and %d intrsn",
- gmac->full_name, gmac->n_addrs, gmac->n_intrs);
- return;
- }
- addr = get_property(gmac, "local-mac-address", NULL);
- if (addr == NULL) {
- printk(KERN_ERR "Can't get mac-address for GMAC %sn",
- gmac->full_name);
- return;
- }
- if (dummy_buf == NULL) {
- dummy_buf = kmalloc(DUMMY_BUF_LEN, GFP_KERNEL);
- if (dummy_buf == NULL) {
- printk(KERN_ERR "GMAC: failed to allocated dummy buffern");
- return;
- }
- }
- tx_descpage = get_free_page(GFP_KERNEL);
- if (tx_descpage == 0) {
- printk(KERN_ERR "GMAC: can't get a page for tx descriptorsn");
- return;
- }
- rx_descpage = get_free_page(GFP_KERNEL);
- if (rx_descpage == 0) {
- printk(KERN_ERR "GMAC: can't get a page for rx descriptorsn");
- goto out_txdesc;
- }
- dev = init_etherdev(NULL, sizeof(struct gmac));
- if (!dev) {
- printk(KERN_ERR "GMAC: init_etherdev failed, out of memoryn");
- goto out_rxdesc;
- }
- SET_MODULE_OWNER(dev);
- gm = dev->priv;
- gm->of_node = gmac;
- if (!request_OF_resource(gmac, 0, " (gmac)")) {
- printk(KERN_ERR "GMAC: can't request IO resource !n");
- goto out_unreg;
- }
- dev->base_addr = gmac->addrs[0].address;
- gm->regs = (volatile unsigned int *)
- ioremap(gmac->addrs[0].address, 0x10000);
- if (!gm->regs) {
- printk(KERN_ERR "GMAC: unable to map I/O registersn");
- goto out_unreg;
- }
- dev->irq = gmac->intrs[0].line;
- gm->dev = dev;
- spin_lock_init(&gm->lock);
-
- if (pci_device_from_OF_node(gmac, &gm->pci_bus, &gm->pci_devfn)) {
- gm->pci_bus = gm->pci_devfn = 0xff;
- printk(KERN_ERR "Can't locate GMAC PCI entryn");
- }
- printk(KERN_INFO "%s: GMAC at", dev->name);
- for (i = 0; i < 6; ++i) {
- dev->dev_addr[i] = addr[i];
- printk("%c%.2x", (i? ':': ' '), addr[i]);
- }
- printk(", driver " GMAC_VERSION "n");
- gm->tx_desc_page = tx_descpage;
- gm->rx_desc_page = rx_descpage;
- gm->rxring = (volatile struct gmac_dma_desc *) rx_descpage;
- gm->txring = (volatile struct gmac_dma_desc *) tx_descpage;
- gm->phy_addr = 0;
- gm->opened = 0;
- gm->sleeping = 0;
- dev->open = gmac_open;
- dev->stop = gmac_close;
- dev->hard_start_xmit = gmac_xmit_start;
- dev->get_stats = gmac_stats;
- dev->set_multicast_list = &gmac_set_multicast;
- dev->tx_timeout = &gmac_tx_timeout;
- dev->watchdog_timeo = 5*HZ;
- ether_setup(dev);
- gm->next_gmac = gmacs;
- gmacs = dev;
- return;
- out_unreg:
- unregister_netdev(dev);
- if (gm->of_node)
- release_OF_resource(gm->of_node, 0);
- kfree(dev);
- out_rxdesc:
- free_page(rx_descpage);
- out_txdesc:
- free_page(tx_descpage);
- }
- MODULE_AUTHOR("Paul Mackerras/Ben Herrenschmidt");
- MODULE_DESCRIPTION("PowerMac GMAC driver.");
- MODULE_LICENSE("GPL");
- EXPORT_NO_SYMBOLS;
- static void __exit gmac_cleanup_module(void)
- {
- struct gmac *gm;
- struct net_device *dev;
- #ifdef CONFIG_PMAC_PBOOK
- if (gmacs)
- pmu_unregister_sleep_notifier(&gmac_sleep_notifier);
- #endif
- while ((dev = gmacs) != NULL) {
- gm = (struct gmac *) dev->priv;
- unregister_netdev(dev);
- iounmap((void *) gm->regs);
- free_page(gm->tx_desc_page);
- free_page(gm->rx_desc_page);
- release_OF_resource(gm->of_node, 0);
- gmacs = gm->next_gmac;
- kfree(dev);
- }
- if (dummy_buf != NULL) {
- kfree(dummy_buf);
- dummy_buf = NULL;
- }
- }
- module_init(gmac_probe);
- module_exit(gmac_cleanup_module);