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linuxdebug/drivers/net/ethernet/sun/sunhme.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/* sunhme.c: Sparc HME/BigMac 10/100baseT half/full duplex auto switching,
* auto carrier detecting ethernet driver. Also known as the
* "Happy Meal Ethernet" found on SunSwift SBUS cards.
*
* Copyright (C) 1996, 1998, 1999, 2002, 2003,
* 2006, 2008 David S. Miller (davem@davemloft.net)
*
* Changes :
* 2000/11/11 Willy Tarreau <willy AT meta-x.org>
* - port to non-sparc architectures. Tested only on x86 and
* only currently works with QFE PCI cards.
* - ability to specify the MAC address at module load time by passing this
* argument : macaddr=0x00,0x10,0x20,0x30,0x40,0x50
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/crc32.h>
#include <linux/random.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/bitops.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#ifdef CONFIG_SPARC
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/idprom.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/auxio.h>
#endif
#include <linux/uaccess.h>
#include <asm/irq.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif
#include "sunhme.h"
#define DRV_NAME "sunhme"
MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
MODULE_DESCRIPTION("Sun HappyMealEthernet(HME) 10/100baseT ethernet driver");
MODULE_LICENSE("GPL");
static int macaddr[6];
/* accept MAC address of the form macaddr=0x08,0x00,0x20,0x30,0x40,0x50 */
module_param_array(macaddr, int, NULL, 0);
MODULE_PARM_DESC(macaddr, "Happy Meal MAC address to set");
#ifdef CONFIG_SBUS
static struct quattro *qfe_sbus_list;
#endif
#ifdef CONFIG_PCI
static struct quattro *qfe_pci_list;
#endif
#define hme_debug(fmt, ...) pr_debug("%s: " fmt, __func__, ##__VA_ARGS__)
#define HMD hme_debug
/* "Auto Switch Debug" aka phy debug */
#if 1
#define ASD hme_debug
#else
#define ASD(...)
#endif
#if 0
struct hme_tx_logent {
unsigned int tstamp;
int tx_new, tx_old;
unsigned int action;
#define TXLOG_ACTION_IRQ 0x01
#define TXLOG_ACTION_TXMIT 0x02
#define TXLOG_ACTION_TBUSY 0x04
#define TXLOG_ACTION_NBUFS 0x08
unsigned int status;
};
#define TX_LOG_LEN 128
static struct hme_tx_logent tx_log[TX_LOG_LEN];
static int txlog_cur_entry;
static __inline__ void tx_add_log(struct happy_meal *hp, unsigned int a, unsigned int s)
{
struct hme_tx_logent *tlp;
unsigned long flags;
local_irq_save(flags);
tlp = &tx_log[txlog_cur_entry];
tlp->tstamp = (unsigned int)jiffies;
tlp->tx_new = hp->tx_new;
tlp->tx_old = hp->tx_old;
tlp->action = a;
tlp->status = s;
txlog_cur_entry = (txlog_cur_entry + 1) & (TX_LOG_LEN - 1);
local_irq_restore(flags);
}
static __inline__ void tx_dump_log(void)
{
int i, this;
this = txlog_cur_entry;
for (i = 0; i < TX_LOG_LEN; i++) {
pr_err("TXLOG[%d]: j[%08x] tx[N(%d)O(%d)] action[%08x] stat[%08x]\n", i,
tx_log[this].tstamp,
tx_log[this].tx_new, tx_log[this].tx_old,
tx_log[this].action, tx_log[this].status);
this = (this + 1) & (TX_LOG_LEN - 1);
}
}
#else
#define tx_add_log(hp, a, s)
#define tx_dump_log()
#endif
#define DEFAULT_IPG0 16 /* For lance-mode only */
#define DEFAULT_IPG1 8 /* For all modes */
#define DEFAULT_IPG2 4 /* For all modes */
#define DEFAULT_JAMSIZE 4 /* Toe jam */
/* NOTE: In the descriptor writes one _must_ write the address
* member _first_. The card must not be allowed to see
* the updated descriptor flags until the address is
* correct. I've added a write memory barrier between
* the two stores so that I can sleep well at night... -DaveM
*/
#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
static void sbus_hme_write32(void __iomem *reg, u32 val)
{
sbus_writel(val, reg);
}
static u32 sbus_hme_read32(void __iomem *reg)
{
return sbus_readl(reg);
}
static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
{
rxd->rx_addr = (__force hme32)addr;
dma_wmb();
rxd->rx_flags = (__force hme32)flags;
}
static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
{
txd->tx_addr = (__force hme32)addr;
dma_wmb();
txd->tx_flags = (__force hme32)flags;
}
static u32 sbus_hme_read_desc32(hme32 *p)
{
return (__force u32)*p;
}
static void pci_hme_write32(void __iomem *reg, u32 val)
{
writel(val, reg);
}
static u32 pci_hme_read32(void __iomem *reg)
{
return readl(reg);
}
static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
{
rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
dma_wmb();
rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
}
static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
{
txd->tx_addr = (__force hme32)cpu_to_le32(addr);
dma_wmb();
txd->tx_flags = (__force hme32)cpu_to_le32(flags);
}
static u32 pci_hme_read_desc32(hme32 *p)
{
return le32_to_cpup((__le32 *)p);
}
#define hme_write32(__hp, __reg, __val) \
((__hp)->write32((__reg), (__val)))
#define hme_read32(__hp, __reg) \
((__hp)->read32(__reg))
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
((__hp)->write_rxd((__rxd), (__flags), (__addr)))
#define hme_write_txd(__hp, __txd, __flags, __addr) \
((__hp)->write_txd((__txd), (__flags), (__addr)))
#define hme_read_desc32(__hp, __p) \
((__hp)->read_desc32(__p))
#else
#ifdef CONFIG_SBUS
/* SBUS only compilation */
#define hme_write32(__hp, __reg, __val) \
sbus_writel((__val), (__reg))
#define hme_read32(__hp, __reg) \
sbus_readl(__reg)
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
do { (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
dma_wmb(); \
(__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
} while(0)
#define hme_write_txd(__hp, __txd, __flags, __addr) \
do { (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
dma_wmb(); \
(__txd)->tx_flags = (__force hme32)(u32)(__flags); \
} while(0)
#define hme_read_desc32(__hp, __p) ((__force u32)(hme32)*(__p))
#else
/* PCI only compilation */
#define hme_write32(__hp, __reg, __val) \
writel((__val), (__reg))
#define hme_read32(__hp, __reg) \
readl(__reg)
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
do { (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
dma_wmb(); \
(__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
} while(0)
#define hme_write_txd(__hp, __txd, __flags, __addr) \
do { (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
dma_wmb(); \
(__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
} while(0)
static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
{
return le32_to_cpup((__le32 *)p);
}
#endif
#endif
/* Oh yes, the MIF BitBang is mighty fun to program. BitBucket is more like it. */
static void BB_PUT_BIT(struct happy_meal *hp, void __iomem *tregs, int bit)
{
hme_write32(hp, tregs + TCVR_BBDATA, bit);
hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
}
#if 0
static u32 BB_GET_BIT(struct happy_meal *hp, void __iomem *tregs, int internal)
{
u32 ret;
hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
ret = hme_read32(hp, tregs + TCVR_CFG);
if (internal)
ret &= TCV_CFG_MDIO0;
else
ret &= TCV_CFG_MDIO1;
return ret;
}
#endif
static u32 BB_GET_BIT2(struct happy_meal *hp, void __iomem *tregs, int internal)
{
u32 retval;
hme_write32(hp, tregs + TCVR_BBCLOCK, 0);
udelay(1);
retval = hme_read32(hp, tregs + TCVR_CFG);
if (internal)
retval &= TCV_CFG_MDIO0;
else
retval &= TCV_CFG_MDIO1;
hme_write32(hp, tregs + TCVR_BBCLOCK, 1);
return retval;
}
#define TCVR_FAILURE 0x80000000 /* Impossible MIF read value */
static int happy_meal_bb_read(struct happy_meal *hp,
void __iomem *tregs, int reg)
{
u32 tmp;
int retval = 0;
int i;
/* Enable the MIF BitBang outputs. */
hme_write32(hp, tregs + TCVR_BBOENAB, 1);
/* Force BitBang into the idle state. */
for (i = 0; i < 32; i++)
BB_PUT_BIT(hp, tregs, 1);
/* Give it the read sequence. */
BB_PUT_BIT(hp, tregs, 0);
BB_PUT_BIT(hp, tregs, 1);
BB_PUT_BIT(hp, tregs, 1);
BB_PUT_BIT(hp, tregs, 0);
/* Give it the PHY address. */
tmp = hp->paddr & 0xff;
for (i = 4; i >= 0; i--)
BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
/* Tell it what register we want to read. */
tmp = (reg & 0xff);
for (i = 4; i >= 0; i--)
BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
/* Close down the MIF BitBang outputs. */
hme_write32(hp, tregs + TCVR_BBOENAB, 0);
/* Now read in the value. */
(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
for (i = 15; i >= 0; i--)
retval |= BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
(void) BB_GET_BIT2(hp, tregs, (hp->tcvr_type == internal));
ASD("reg=%d value=%x\n", reg, retval);
return retval;
}
static void happy_meal_bb_write(struct happy_meal *hp,
void __iomem *tregs, int reg,
unsigned short value)
{
u32 tmp;
int i;
ASD("reg=%d value=%x\n", reg, value);
/* Enable the MIF BitBang outputs. */
hme_write32(hp, tregs + TCVR_BBOENAB, 1);
/* Force BitBang into the idle state. */
for (i = 0; i < 32; i++)
BB_PUT_BIT(hp, tregs, 1);
/* Give it write sequence. */
BB_PUT_BIT(hp, tregs, 0);
BB_PUT_BIT(hp, tregs, 1);
BB_PUT_BIT(hp, tregs, 0);
BB_PUT_BIT(hp, tregs, 1);
/* Give it the PHY address. */
tmp = (hp->paddr & 0xff);
for (i = 4; i >= 0; i--)
BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
/* Tell it what register we will be writing. */
tmp = (reg & 0xff);
for (i = 4; i >= 0; i--)
BB_PUT_BIT(hp, tregs, ((tmp >> i) & 1));
/* Tell it to become ready for the bits. */
BB_PUT_BIT(hp, tregs, 1);
BB_PUT_BIT(hp, tregs, 0);
for (i = 15; i >= 0; i--)
BB_PUT_BIT(hp, tregs, ((value >> i) & 1));
/* Close down the MIF BitBang outputs. */
hme_write32(hp, tregs + TCVR_BBOENAB, 0);
}
#define TCVR_READ_TRIES 16
static int happy_meal_tcvr_read(struct happy_meal *hp,
void __iomem *tregs, int reg)
{
int tries = TCVR_READ_TRIES;
int retval;
if (hp->tcvr_type == none) {
ASD("no transceiver, value=TCVR_FAILURE\n");
return TCVR_FAILURE;
}
if (!(hp->happy_flags & HFLAG_FENABLE)) {
ASD("doing bit bang\n");
return happy_meal_bb_read(hp, tregs, reg);
}
hme_write32(hp, tregs + TCVR_FRAME,
(FRAME_READ | (hp->paddr << 23) | ((reg & 0xff) << 18)));
while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
udelay(20);
if (!tries) {
netdev_err(hp->dev, "Aieee, transceiver MIF read bolixed\n");
return TCVR_FAILURE;
}
retval = hme_read32(hp, tregs + TCVR_FRAME) & 0xffff;
ASD("reg=0x%02x value=%04x\n", reg, retval);
return retval;
}
#define TCVR_WRITE_TRIES 16
static void happy_meal_tcvr_write(struct happy_meal *hp,
void __iomem *tregs, int reg,
unsigned short value)
{
int tries = TCVR_WRITE_TRIES;
ASD("reg=0x%02x value=%04x\n", reg, value);
/* Welcome to Sun Microsystems, can I take your order please? */
if (!(hp->happy_flags & HFLAG_FENABLE)) {
happy_meal_bb_write(hp, tregs, reg, value);
return;
}
/* Would you like fries with that? */
hme_write32(hp, tregs + TCVR_FRAME,
(FRAME_WRITE | (hp->paddr << 23) |
((reg & 0xff) << 18) | (value & 0xffff)));
while (!(hme_read32(hp, tregs + TCVR_FRAME) & 0x10000) && --tries)
udelay(20);
/* Anything else? */
if (!tries)
netdev_err(hp->dev, "Aieee, transceiver MIF write bolixed\n");
/* Fifty-two cents is your change, have a nice day. */
}
/* Auto negotiation. The scheme is very simple. We have a timer routine
* that keeps watching the auto negotiation process as it progresses.
* The DP83840 is first told to start doing it's thing, we set up the time
* and place the timer state machine in it's initial state.
*
* Here the timer peeks at the DP83840 status registers at each click to see
* if the auto negotiation has completed, we assume here that the DP83840 PHY
* will time out at some point and just tell us what (didn't) happen. For
* complete coverage we only allow so many of the ticks at this level to run,
* when this has expired we print a warning message and try another strategy.
* This "other" strategy is to force the interface into various speed/duplex
* configurations and we stop when we see a link-up condition before the
* maximum number of "peek" ticks have occurred.
*
* Once a valid link status has been detected we configure the BigMAC and
* the rest of the Happy Meal to speak the most efficient protocol we could
* get a clean link for. The priority for link configurations, highest first
* is:
* 100 Base-T Full Duplex
* 100 Base-T Half Duplex
* 10 Base-T Full Duplex
* 10 Base-T Half Duplex
*
* We start a new timer now, after a successful auto negotiation status has
* been detected. This timer just waits for the link-up bit to get set in
* the BMCR of the DP83840. When this occurs we print a kernel log message
* describing the link type in use and the fact that it is up.
*
* If a fatal error of some sort is signalled and detected in the interrupt
* service routine, and the chip is reset, or the link is ifconfig'd down
* and then back up, this entire process repeats itself all over again.
*/
static int try_next_permutation(struct happy_meal *hp, void __iomem *tregs)
{
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
/* Downgrade from full to half duplex. Only possible
* via ethtool.
*/
if (hp->sw_bmcr & BMCR_FULLDPLX) {
hp->sw_bmcr &= ~(BMCR_FULLDPLX);
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
return 0;
}
/* Downgrade from 100 to 10. */
if (hp->sw_bmcr & BMCR_SPEED100) {
hp->sw_bmcr &= ~(BMCR_SPEED100);
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
return 0;
}
/* We've tried everything. */
return -1;
}
static void display_link_mode(struct happy_meal *hp, void __iomem *tregs)
{
hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
netdev_info(hp->dev,
"Link is up using %s transceiver at %dMb/s, %s Duplex.\n",
hp->tcvr_type == external ? "external" : "internal",
hp->sw_lpa & (LPA_100HALF | LPA_100FULL) ? 100 : 10,
hp->sw_lpa & (LPA_100FULL | LPA_10FULL) ? "Full" : "Half");
}
static void display_forced_link_mode(struct happy_meal *hp, void __iomem *tregs)
{
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
netdev_info(hp->dev,
"Link has been forced up using %s transceiver at %dMb/s, %s Duplex.\n",
hp->tcvr_type == external ? "external" : "internal",
hp->sw_bmcr & BMCR_SPEED100 ? 100 : 10,
hp->sw_bmcr & BMCR_FULLDPLX ? "Full" : "Half");
}
static int set_happy_link_modes(struct happy_meal *hp, void __iomem *tregs)
{
int full;
/* All we care about is making sure the bigmac tx_cfg has a
* proper duplex setting.
*/
if (hp->timer_state == arbwait) {
hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
if (!(hp->sw_lpa & (LPA_10HALF | LPA_10FULL | LPA_100HALF | LPA_100FULL)))
goto no_response;
if (hp->sw_lpa & LPA_100FULL)
full = 1;
else if (hp->sw_lpa & LPA_100HALF)
full = 0;
else if (hp->sw_lpa & LPA_10FULL)
full = 1;
else
full = 0;
} else {
/* Forcing a link mode. */
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
if (hp->sw_bmcr & BMCR_FULLDPLX)
full = 1;
else
full = 0;
}
/* Before changing other bits in the tx_cfg register, and in
* general any of other the TX config registers too, you
* must:
* 1) Clear Enable
* 2) Poll with reads until that bit reads back as zero
* 3) Make TX configuration changes
* 4) Set Enable once more
*/
hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
~(BIGMAC_TXCFG_ENABLE));
while (hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) & BIGMAC_TXCFG_ENABLE)
barrier();
if (full) {
hp->happy_flags |= HFLAG_FULL;
hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
BIGMAC_TXCFG_FULLDPLX);
} else {
hp->happy_flags &= ~(HFLAG_FULL);
hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) &
~(BIGMAC_TXCFG_FULLDPLX));
}
hme_write32(hp, hp->bigmacregs + BMAC_TXCFG,
hme_read32(hp, hp->bigmacregs + BMAC_TXCFG) |
BIGMAC_TXCFG_ENABLE);
return 0;
no_response:
return 1;
}
static int happy_meal_init(struct happy_meal *hp);
static int is_lucent_phy(struct happy_meal *hp)
{
void __iomem *tregs = hp->tcvregs;
unsigned short mr2, mr3;
int ret = 0;
mr2 = happy_meal_tcvr_read(hp, tregs, 2);
mr3 = happy_meal_tcvr_read(hp, tregs, 3);
if ((mr2 & 0xffff) == 0x0180 &&
((mr3 & 0xffff) >> 10) == 0x1d)
ret = 1;
return ret;
}
static void happy_meal_timer(struct timer_list *t)
{
struct happy_meal *hp = from_timer(hp, t, happy_timer);
void __iomem *tregs = hp->tcvregs;
int restart_timer = 0;
spin_lock_irq(&hp->happy_lock);
hp->timer_ticks++;
switch(hp->timer_state) {
case arbwait:
/* Only allow for 5 ticks, thats 10 seconds and much too
* long to wait for arbitration to complete.
*/
if (hp->timer_ticks >= 10) {
/* Enter force mode. */
do_force_mode:
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
netdev_notice(hp->dev,
"Auto-Negotiation unsuccessful, trying force link mode\n");
hp->sw_bmcr = BMCR_SPEED100;
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
if (!is_lucent_phy(hp)) {
/* OK, seems we need do disable the transceiver for the first
* tick to make sure we get an accurate link state at the
* second tick.
*/
hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG, hp->sw_csconfig);
}
hp->timer_state = ltrywait;
hp->timer_ticks = 0;
restart_timer = 1;
} else {
/* Anything interesting happen? */
hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
if (hp->sw_bmsr & BMSR_ANEGCOMPLETE) {
int ret;
/* Just what we've been waiting for... */
ret = set_happy_link_modes(hp, tregs);
if (ret) {
/* Ooops, something bad happened, go to force
* mode.
*
* XXX Broken hubs which don't support 802.3u
* XXX auto-negotiation make this happen as well.
*/
goto do_force_mode;
}
/* Success, at least so far, advance our state engine. */
hp->timer_state = lupwait;
restart_timer = 1;
} else {
restart_timer = 1;
}
}
break;
case lupwait:
/* Auto negotiation was successful and we are awaiting a
* link up status. I have decided to let this timer run
* forever until some sort of error is signalled, reporting
* a message to the user at 10 second intervals.
*/
hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
if (hp->sw_bmsr & BMSR_LSTATUS) {
/* Wheee, it's up, display the link mode in use and put
* the timer to sleep.
*/
display_link_mode(hp, tregs);
hp->timer_state = asleep;
restart_timer = 0;
} else {
if (hp->timer_ticks >= 10) {
netdev_notice(hp->dev,
"Auto negotiation successful, link still not completely up.\n");
hp->timer_ticks = 0;
restart_timer = 1;
} else {
restart_timer = 1;
}
}
break;
case ltrywait:
/* Making the timeout here too long can make it take
* annoyingly long to attempt all of the link mode
* permutations, but then again this is essentially
* error recovery code for the most part.
*/
hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs, DP83840_CSCONFIG);
if (hp->timer_ticks == 1) {
if (!is_lucent_phy(hp)) {
/* Re-enable transceiver, we'll re-enable the transceiver next
* tick, then check link state on the following tick.
*/
hp->sw_csconfig |= CSCONFIG_TCVDISAB;
happy_meal_tcvr_write(hp, tregs,
DP83840_CSCONFIG, hp->sw_csconfig);
}
restart_timer = 1;
break;
}
if (hp->timer_ticks == 2) {
if (!is_lucent_phy(hp)) {
hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
happy_meal_tcvr_write(hp, tregs,
DP83840_CSCONFIG, hp->sw_csconfig);
}
restart_timer = 1;
break;
}
if (hp->sw_bmsr & BMSR_LSTATUS) {
/* Force mode selection success. */
display_forced_link_mode(hp, tregs);
set_happy_link_modes(hp, tregs); /* XXX error? then what? */
hp->timer_state = asleep;
restart_timer = 0;
} else {
if (hp->timer_ticks >= 4) { /* 6 seconds or so... */
int ret;
ret = try_next_permutation(hp, tregs);
if (ret == -1) {
/* Aieee, tried them all, reset the
* chip and try all over again.
*/
/* Let the user know... */
netdev_notice(hp->dev,
"Link down, cable problem?\n");
ret = happy_meal_init(hp);
if (ret) {
/* ho hum... */
netdev_err(hp->dev,
"Error, cannot re-init the Happy Meal.\n");
}
goto out;
}
if (!is_lucent_phy(hp)) {
hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
DP83840_CSCONFIG);
hp->sw_csconfig |= CSCONFIG_TCVDISAB;
happy_meal_tcvr_write(hp, tregs,
DP83840_CSCONFIG, hp->sw_csconfig);
}
hp->timer_ticks = 0;
restart_timer = 1;
} else {
restart_timer = 1;
}
}
break;
case asleep:
default:
/* Can't happens.... */
netdev_err(hp->dev,
"Aieee, link timer is asleep but we got one anyways!\n");
restart_timer = 0;
hp->timer_ticks = 0;
hp->timer_state = asleep; /* foo on you */
break;
}
if (restart_timer) {
hp->happy_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
add_timer(&hp->happy_timer);
}
out:
spin_unlock_irq(&hp->happy_lock);
}
#define TX_RESET_TRIES 32
#define RX_RESET_TRIES 32
/* hp->happy_lock must be held */
static void happy_meal_tx_reset(struct happy_meal *hp, void __iomem *bregs)
{
int tries = TX_RESET_TRIES;
HMD("reset...\n");
/* Would you like to try our SMCC Delux? */
hme_write32(hp, bregs + BMAC_TXSWRESET, 0);
while ((hme_read32(hp, bregs + BMAC_TXSWRESET) & 1) && --tries)
udelay(20);
/* Lettuce, tomato, buggy hardware (no extra charge)? */
if (!tries)
netdev_err(hp->dev, "Transceiver BigMac ATTACK!");
/* Take care. */
HMD("done\n");
}
/* hp->happy_lock must be held */
static void happy_meal_rx_reset(struct happy_meal *hp, void __iomem *bregs)
{
int tries = RX_RESET_TRIES;
HMD("reset...\n");
/* We have a special on GNU/Viking hardware bugs today. */
hme_write32(hp, bregs + BMAC_RXSWRESET, 0);
while ((hme_read32(hp, bregs + BMAC_RXSWRESET) & 1) && --tries)
udelay(20);
/* Will that be all? */
if (!tries)
netdev_err(hp->dev, "Receiver BigMac ATTACK!\n");
/* Don't forget your vik_1137125_wa. Have a nice day. */
HMD("done\n");
}
#define STOP_TRIES 16
/* hp->happy_lock must be held */
static void happy_meal_stop(struct happy_meal *hp, void __iomem *gregs)
{
int tries = STOP_TRIES;
HMD("reset...\n");
/* We're consolidating our STB products, it's your lucky day. */
hme_write32(hp, gregs + GREG_SWRESET, GREG_RESET_ALL);
while (hme_read32(hp, gregs + GREG_SWRESET) && --tries)
udelay(20);
/* Come back next week when we are "Sun Microelectronics". */
if (!tries)
netdev_err(hp->dev, "Fry guys.\n");
/* Remember: "Different name, same old buggy as shit hardware." */
HMD("done\n");
}
/* hp->happy_lock must be held */
static void happy_meal_get_counters(struct happy_meal *hp, void __iomem *bregs)
{
struct net_device_stats *stats = &hp->dev->stats;
stats->rx_crc_errors += hme_read32(hp, bregs + BMAC_RCRCECTR);
hme_write32(hp, bregs + BMAC_RCRCECTR, 0);
stats->rx_frame_errors += hme_read32(hp, bregs + BMAC_UNALECTR);
hme_write32(hp, bregs + BMAC_UNALECTR, 0);
stats->rx_length_errors += hme_read32(hp, bregs + BMAC_GLECTR);
hme_write32(hp, bregs + BMAC_GLECTR, 0);
stats->tx_aborted_errors += hme_read32(hp, bregs + BMAC_EXCTR);
stats->collisions +=
(hme_read32(hp, bregs + BMAC_EXCTR) +
hme_read32(hp, bregs + BMAC_LTCTR));
hme_write32(hp, bregs + BMAC_EXCTR, 0);
hme_write32(hp, bregs + BMAC_LTCTR, 0);
}
/* hp->happy_lock must be held */
static void happy_meal_poll_stop(struct happy_meal *hp, void __iomem *tregs)
{
/* If polling disabled or not polling already, nothing to do. */
if ((hp->happy_flags & (HFLAG_POLLENABLE | HFLAG_POLL)) !=
(HFLAG_POLLENABLE | HFLAG_POLL)) {
ASD("not polling, return\n");
return;
}
/* Shut up the MIF. */
ASD("were polling, mif ints off, polling off\n");
hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
/* Turn off polling. */
hme_write32(hp, tregs + TCVR_CFG,
hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_PENABLE));
/* We are no longer polling. */
hp->happy_flags &= ~(HFLAG_POLL);
/* Let the bits set. */
udelay(200);
ASD("done\n");
}
/* Only Sun can take such nice parts and fuck up the programming interface
* like this. Good job guys...
*/
#define TCVR_RESET_TRIES 16 /* It should reset quickly */
#define TCVR_UNISOLATE_TRIES 32 /* Dis-isolation can take longer. */
/* hp->happy_lock must be held */
static int happy_meal_tcvr_reset(struct happy_meal *hp, void __iomem *tregs)
{
u32 tconfig;
int result, tries = TCVR_RESET_TRIES;
tconfig = hme_read32(hp, tregs + TCVR_CFG);
ASD("tcfg=%08x\n", tconfig);
if (hp->tcvr_type == external) {
hme_write32(hp, tregs + TCVR_CFG, tconfig & ~(TCV_CFG_PSELECT));
hp->tcvr_type = internal;
hp->paddr = TCV_PADDR_ITX;
happy_meal_tcvr_write(hp, tregs, MII_BMCR,
(BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
if (result == TCVR_FAILURE) {
ASD("phyread_fail\n");
return -1;
}
ASD("external: ISOLATE, phyread_ok, PSELECT\n");
hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
hp->tcvr_type = external;
hp->paddr = TCV_PADDR_ETX;
} else {
if (tconfig & TCV_CFG_MDIO1) {
hme_write32(hp, tregs + TCVR_CFG, (tconfig | TCV_CFG_PSELECT));
happy_meal_tcvr_write(hp, tregs, MII_BMCR,
(BMCR_LOOPBACK|BMCR_PDOWN|BMCR_ISOLATE));
result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
if (result == TCVR_FAILURE) {
ASD("phyread_fail>\n");
return -1;
}
ASD("internal: PSELECT, ISOLATE, phyread_ok, ~PSELECT\n");
hme_write32(hp, tregs + TCVR_CFG, (tconfig & ~(TCV_CFG_PSELECT)));
hp->tcvr_type = internal;
hp->paddr = TCV_PADDR_ITX;
}
}
ASD("BMCR_RESET...\n");
happy_meal_tcvr_write(hp, tregs, MII_BMCR, BMCR_RESET);
while (--tries) {
result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
if (result == TCVR_FAILURE)
return -1;
hp->sw_bmcr = result;
if (!(result & BMCR_RESET))
break;
udelay(20);
}
if (!tries) {
ASD("BMCR RESET FAILED!\n");
return -1;
}
ASD("RESET_OK\n");
/* Get fresh copies of the PHY registers. */
hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
hp->sw_physid1 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
hp->sw_physid2 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
ASD("UNISOLATE...\n");
hp->sw_bmcr &= ~(BMCR_ISOLATE);
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
tries = TCVR_UNISOLATE_TRIES;
while (--tries) {
result = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
if (result == TCVR_FAILURE)
return -1;
if (!(result & BMCR_ISOLATE))
break;
udelay(20);
}
if (!tries) {
ASD("UNISOLATE FAILED!\n");
return -1;
}
ASD("SUCCESS and CSCONFIG_DFBYPASS\n");
if (!is_lucent_phy(hp)) {
result = happy_meal_tcvr_read(hp, tregs,
DP83840_CSCONFIG);
happy_meal_tcvr_write(hp, tregs,
DP83840_CSCONFIG, (result | CSCONFIG_DFBYPASS));
}
return 0;
}
/* Figure out whether we have an internal or external transceiver.
*
* hp->happy_lock must be held
*/
static void happy_meal_transceiver_check(struct happy_meal *hp, void __iomem *tregs)
{
unsigned long tconfig = hme_read32(hp, tregs + TCVR_CFG);
ASD("tcfg=%08lx\n", tconfig);
if (hp->happy_flags & HFLAG_POLL) {
/* If we are polling, we must stop to get the transceiver type. */
if (hp->tcvr_type == internal) {
if (tconfig & TCV_CFG_MDIO1) {
happy_meal_poll_stop(hp, tregs);
hp->paddr = TCV_PADDR_ETX;
hp->tcvr_type = external;
tconfig &= ~(TCV_CFG_PENABLE);
tconfig |= TCV_CFG_PSELECT;
hme_write32(hp, tregs + TCVR_CFG, tconfig);
ASD("poll stop, internal->external\n");
}
} else {
if (hp->tcvr_type == external) {
if (!(hme_read32(hp, tregs + TCVR_STATUS) >> 16)) {
happy_meal_poll_stop(hp, tregs);
hp->paddr = TCV_PADDR_ITX;
hp->tcvr_type = internal;
hme_write32(hp, tregs + TCVR_CFG,
hme_read32(hp, tregs + TCVR_CFG) &
~(TCV_CFG_PSELECT));
ASD("poll stop, external->internal\n");
}
} else {
ASD("polling, none\n");
}
}
} else {
u32 reread = hme_read32(hp, tregs + TCVR_CFG);
/* Else we can just work off of the MDIO bits. */
if (reread & TCV_CFG_MDIO1) {
hme_write32(hp, tregs + TCVR_CFG, tconfig | TCV_CFG_PSELECT);
hp->paddr = TCV_PADDR_ETX;
hp->tcvr_type = external;
ASD("not polling, external\n");
} else {
if (reread & TCV_CFG_MDIO0) {
hme_write32(hp, tregs + TCVR_CFG,
tconfig & ~(TCV_CFG_PSELECT));
hp->paddr = TCV_PADDR_ITX;
hp->tcvr_type = internal;
ASD("not polling, internal\n");
} else {
netdev_err(hp->dev,
"Transceiver and a coke please.");
hp->tcvr_type = none; /* Grrr... */
ASD("not polling, none\n");
}
}
}
}
/* The receive ring buffers are a bit tricky to get right. Here goes...
*
* The buffers we dma into must be 64 byte aligned. So we use a special
* alloc_skb() routine for the happy meal to allocate 64 bytes more than
* we really need.
*
* We use skb_reserve() to align the data block we get in the skb. We
* also program the etxregs->cfg register to use an offset of 2. This
* imperical constant plus the ethernet header size will always leave
* us with a nicely aligned ip header once we pass things up to the
* protocol layers.
*
* The numbers work out to:
*
* Max ethernet frame size 1518
* Ethernet header size 14
* Happy Meal base offset 2
*
* Say a skb data area is at 0xf001b010, and its size alloced is
* (ETH_FRAME_LEN + 64 + 2) = (1514 + 64 + 2) = 1580 bytes.
*
* First our alloc_skb() routine aligns the data base to a 64 byte
* boundary. We now have 0xf001b040 as our skb data address. We
* plug this into the receive descriptor address.
*
* Next, we skb_reserve() 2 bytes to account for the Happy Meal offset.
* So now the data we will end up looking at starts at 0xf001b042. When
* the packet arrives, we will check out the size received and subtract
* this from the skb->length. Then we just pass the packet up to the
* protocols as is, and allocate a new skb to replace this slot we have
* just received from.
*
* The ethernet layer will strip the ether header from the front of the
* skb we just sent to it, this leaves us with the ip header sitting
* nicely aligned at 0xf001b050. Also, for tcp and udp packets the
* Happy Meal has even checksummed the tcp/udp data for us. The 16
* bit checksum is obtained from the low bits of the receive descriptor
* flags, thus:
*
* skb->csum = rxd->rx_flags & 0xffff;
* skb->ip_summed = CHECKSUM_COMPLETE;
*
* before sending off the skb to the protocols, and we are good as gold.
*/
static void happy_meal_clean_rings(struct happy_meal *hp)
{
int i;
for (i = 0; i < RX_RING_SIZE; i++) {
if (hp->rx_skbs[i] != NULL) {
struct sk_buff *skb = hp->rx_skbs[i];
struct happy_meal_rxd *rxd;
u32 dma_addr;
rxd = &hp->happy_block->happy_meal_rxd[i];
dma_addr = hme_read_desc32(hp, &rxd->rx_addr);
dma_unmap_single(hp->dma_dev, dma_addr,
RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
hp->rx_skbs[i] = NULL;
}
}
for (i = 0; i < TX_RING_SIZE; i++) {
if (hp->tx_skbs[i] != NULL) {
struct sk_buff *skb = hp->tx_skbs[i];
struct happy_meal_txd *txd;
u32 dma_addr;
int frag;
hp->tx_skbs[i] = NULL;
for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
txd = &hp->happy_block->happy_meal_txd[i];
dma_addr = hme_read_desc32(hp, &txd->tx_addr);
if (!frag)
dma_unmap_single(hp->dma_dev, dma_addr,
(hme_read_desc32(hp, &txd->tx_flags)
& TXFLAG_SIZE),
DMA_TO_DEVICE);
else
dma_unmap_page(hp->dma_dev, dma_addr,
(hme_read_desc32(hp, &txd->tx_flags)
& TXFLAG_SIZE),
DMA_TO_DEVICE);
if (frag != skb_shinfo(skb)->nr_frags)
i++;
}
dev_kfree_skb_any(skb);
}
}
}
/* hp->happy_lock must be held */
static void happy_meal_init_rings(struct happy_meal *hp)
{
struct hmeal_init_block *hb = hp->happy_block;
int i;
HMD("counters to zero\n");
hp->rx_new = hp->rx_old = hp->tx_new = hp->tx_old = 0;
/* Free any skippy bufs left around in the rings. */
happy_meal_clean_rings(hp);
/* Now get new skippy bufs for the receive ring. */
HMD("init rxring\n");
for (i = 0; i < RX_RING_SIZE; i++) {
struct sk_buff *skb;
u32 mapping;
skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
if (!skb) {
hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
continue;
}
hp->rx_skbs[i] = skb;
/* Because we reserve afterwards. */
skb_put(skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
mapping = dma_map_single(hp->dma_dev, skb->data, RX_BUF_ALLOC_SIZE,
DMA_FROM_DEVICE);
if (dma_mapping_error(hp->dma_dev, mapping)) {
dev_kfree_skb_any(skb);
hme_write_rxd(hp, &hb->happy_meal_rxd[i], 0, 0);
continue;
}
hme_write_rxd(hp, &hb->happy_meal_rxd[i],
(RXFLAG_OWN | ((RX_BUF_ALLOC_SIZE - RX_OFFSET) << 16)),
mapping);
skb_reserve(skb, RX_OFFSET);
}
HMD("init txring\n");
for (i = 0; i < TX_RING_SIZE; i++)
hme_write_txd(hp, &hb->happy_meal_txd[i], 0, 0);
HMD("done\n");
}
/* hp->happy_lock must be held */
static void
happy_meal_begin_auto_negotiation(struct happy_meal *hp,
void __iomem *tregs,
const struct ethtool_link_ksettings *ep)
{
int timeout;
/* Read all of the registers we are interested in now. */
hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
hp->sw_physid1 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID1);
hp->sw_physid2 = happy_meal_tcvr_read(hp, tregs, MII_PHYSID2);
/* XXX Check BMSR_ANEGCAPABLE, should not be necessary though. */
hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
/* Advertise everything we can support. */
if (hp->sw_bmsr & BMSR_10HALF)
hp->sw_advertise |= (ADVERTISE_10HALF);
else
hp->sw_advertise &= ~(ADVERTISE_10HALF);
if (hp->sw_bmsr & BMSR_10FULL)
hp->sw_advertise |= (ADVERTISE_10FULL);
else
hp->sw_advertise &= ~(ADVERTISE_10FULL);
if (hp->sw_bmsr & BMSR_100HALF)
hp->sw_advertise |= (ADVERTISE_100HALF);
else
hp->sw_advertise &= ~(ADVERTISE_100HALF);
if (hp->sw_bmsr & BMSR_100FULL)
hp->sw_advertise |= (ADVERTISE_100FULL);
else
hp->sw_advertise &= ~(ADVERTISE_100FULL);
happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
/* XXX Currently no Happy Meal cards I know off support 100BaseT4,
* XXX and this is because the DP83840 does not support it, changes
* XXX would need to be made to the tx/rx logic in the driver as well
* XXX so I completely skip checking for it in the BMSR for now.
*/
ASD("Advertising [ %s%s%s%s]\n",
hp->sw_advertise & ADVERTISE_10HALF ? "10H " : "",
hp->sw_advertise & ADVERTISE_10FULL ? "10F " : "",
hp->sw_advertise & ADVERTISE_100HALF ? "100H " : "",
hp->sw_advertise & ADVERTISE_100FULL ? "100F " : "");
/* Enable Auto-Negotiation, this is usually on already... */
hp->sw_bmcr |= BMCR_ANENABLE;
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
/* Restart it to make sure it is going. */
hp->sw_bmcr |= BMCR_ANRESTART;
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
/* BMCR_ANRESTART self clears when the process has begun. */
timeout = 64; /* More than enough. */
while (--timeout) {
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
if (!(hp->sw_bmcr & BMCR_ANRESTART))
break; /* got it. */
udelay(10);
}
if (!timeout) {
netdev_err(hp->dev,
"Happy Meal would not start auto negotiation BMCR=0x%04x\n",
hp->sw_bmcr);
netdev_notice(hp->dev,
"Performing force link detection.\n");
goto force_link;
} else {
hp->timer_state = arbwait;
}
} else {
force_link:
/* Force the link up, trying first a particular mode.
* Either we are here at the request of ethtool or
* because the Happy Meal would not start to autoneg.
*/
/* Disable auto-negotiation in BMCR, enable the duplex and
* speed setting, init the timer state machine, and fire it off.
*/
if (!ep || ep->base.autoneg == AUTONEG_ENABLE) {
hp->sw_bmcr = BMCR_SPEED100;
} else {
if (ep->base.speed == SPEED_100)
hp->sw_bmcr = BMCR_SPEED100;
else
hp->sw_bmcr = 0;
if (ep->base.duplex == DUPLEX_FULL)
hp->sw_bmcr |= BMCR_FULLDPLX;
}
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
if (!is_lucent_phy(hp)) {
/* OK, seems we need do disable the transceiver for the first
* tick to make sure we get an accurate link state at the
* second tick.
*/
hp->sw_csconfig = happy_meal_tcvr_read(hp, tregs,
DP83840_CSCONFIG);
hp->sw_csconfig &= ~(CSCONFIG_TCVDISAB);
happy_meal_tcvr_write(hp, tregs, DP83840_CSCONFIG,
hp->sw_csconfig);
}
hp->timer_state = ltrywait;
}
hp->timer_ticks = 0;
hp->happy_timer.expires = jiffies + (12 * HZ)/10; /* 1.2 sec. */
add_timer(&hp->happy_timer);
}
/* hp->happy_lock must be held */
static int happy_meal_init(struct happy_meal *hp)
{
const unsigned char *e = &hp->dev->dev_addr[0];
void __iomem *gregs = hp->gregs;
void __iomem *etxregs = hp->etxregs;
void __iomem *erxregs = hp->erxregs;
void __iomem *bregs = hp->bigmacregs;
void __iomem *tregs = hp->tcvregs;
const char *bursts = "64";
u32 regtmp, rxcfg;
/* If auto-negotiation timer is running, kill it. */
del_timer(&hp->happy_timer);
HMD("happy_flags[%08x]\n", hp->happy_flags);
if (!(hp->happy_flags & HFLAG_INIT)) {
HMD("set HFLAG_INIT\n");
hp->happy_flags |= HFLAG_INIT;
happy_meal_get_counters(hp, bregs);
}
/* Stop polling. */
HMD("to happy_meal_poll_stop\n");
happy_meal_poll_stop(hp, tregs);
/* Stop transmitter and receiver. */
HMD("to happy_meal_stop\n");
happy_meal_stop(hp, gregs);
/* Alloc and reset the tx/rx descriptor chains. */
HMD("to happy_meal_init_rings\n");
happy_meal_init_rings(hp);
/* Shut up the MIF. */
HMD("Disable all MIF irqs (old[%08x])\n",
hme_read32(hp, tregs + TCVR_IMASK));
hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
/* See if we can enable the MIF frame on this card to speak to the DP83840. */
if (hp->happy_flags & HFLAG_FENABLE) {
HMD("use frame old[%08x]\n",
hme_read32(hp, tregs + TCVR_CFG));
hme_write32(hp, tregs + TCVR_CFG,
hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
} else {
HMD("use bitbang old[%08x]\n",
hme_read32(hp, tregs + TCVR_CFG));
hme_write32(hp, tregs + TCVR_CFG,
hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
}
/* Check the state of the transceiver. */
HMD("to happy_meal_transceiver_check\n");
happy_meal_transceiver_check(hp, tregs);
/* Put the Big Mac into a sane state. */
switch(hp->tcvr_type) {
case none:
/* Cannot operate if we don't know the transceiver type! */
HMD("AAIEEE no transceiver type, EAGAIN\n");
return -EAGAIN;
case internal:
/* Using the MII buffers. */
HMD("internal, using MII\n");
hme_write32(hp, bregs + BMAC_XIFCFG, 0);
break;
case external:
/* Not using the MII, disable it. */
HMD("external, disable MII\n");
hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
break;
}
if (happy_meal_tcvr_reset(hp, tregs))
return -EAGAIN;
/* Reset the Happy Meal Big Mac transceiver and the receiver. */
HMD("tx/rx reset\n");
happy_meal_tx_reset(hp, bregs);
happy_meal_rx_reset(hp, bregs);
/* Set jam size and inter-packet gaps to reasonable defaults. */
hme_write32(hp, bregs + BMAC_JSIZE, DEFAULT_JAMSIZE);
hme_write32(hp, bregs + BMAC_IGAP1, DEFAULT_IPG1);
hme_write32(hp, bregs + BMAC_IGAP2, DEFAULT_IPG2);
/* Load up the MAC address and random seed. */
/* The docs recommend to use the 10LSB of our MAC here. */
hme_write32(hp, bregs + BMAC_RSEED, ((e[5] | e[4]<<8)&0x3ff));
hme_write32(hp, bregs + BMAC_MACADDR2, ((e[4] << 8) | e[5]));
hme_write32(hp, bregs + BMAC_MACADDR1, ((e[2] << 8) | e[3]));
hme_write32(hp, bregs + BMAC_MACADDR0, ((e[0] << 8) | e[1]));
if ((hp->dev->flags & IFF_ALLMULTI) ||
(netdev_mc_count(hp->dev) > 64)) {
hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
} else if ((hp->dev->flags & IFF_PROMISC) == 0) {
u16 hash_table[4];
struct netdev_hw_addr *ha;
u32 crc;
memset(hash_table, 0, sizeof(hash_table));
netdev_for_each_mc_addr(ha, hp->dev) {
crc = ether_crc_le(6, ha->addr);
crc >>= 26;
hash_table[crc >> 4] |= 1 << (crc & 0xf);
}
hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
} else {
hme_write32(hp, bregs + BMAC_HTABLE3, 0);
hme_write32(hp, bregs + BMAC_HTABLE2, 0);
hme_write32(hp, bregs + BMAC_HTABLE1, 0);
hme_write32(hp, bregs + BMAC_HTABLE0, 0);
}
/* Set the RX and TX ring ptrs. */
HMD("ring ptrs rxr[%08x] txr[%08x]\n",
((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)),
((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
hme_write32(hp, erxregs + ERX_RING,
((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)));
hme_write32(hp, etxregs + ETX_RING,
((__u32)hp->hblock_dvma + hblock_offset(happy_meal_txd, 0)));
/* Parity issues in the ERX unit of some HME revisions can cause some
* registers to not be written unless their parity is even. Detect such
* lost writes and simply rewrite with a low bit set (which will be ignored
* since the rxring needs to be 2K aligned).
*/
if (hme_read32(hp, erxregs + ERX_RING) !=
((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0)))
hme_write32(hp, erxregs + ERX_RING,
((__u32)hp->hblock_dvma + hblock_offset(happy_meal_rxd, 0))
| 0x4);
/* Set the supported burst sizes. */
#ifndef CONFIG_SPARC
/* It is always PCI and can handle 64byte bursts. */
hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST64);
#else
if ((hp->happy_bursts & DMA_BURST64) &&
((hp->happy_flags & HFLAG_PCI) != 0
#ifdef CONFIG_SBUS
|| sbus_can_burst64()
#endif
|| 0)) {
u32 gcfg = GREG_CFG_BURST64;
/* I have no idea if I should set the extended
* transfer mode bit for Cheerio, so for now I
* do not. -DaveM
*/
#ifdef CONFIG_SBUS
if ((hp->happy_flags & HFLAG_PCI) == 0) {
struct platform_device *op = hp->happy_dev;
if (sbus_can_dma_64bit()) {
sbus_set_sbus64(&op->dev,
hp->happy_bursts);
gcfg |= GREG_CFG_64BIT;
}
}
#endif
bursts = "64";
hme_write32(hp, gregs + GREG_CFG, gcfg);
} else if (hp->happy_bursts & DMA_BURST32) {
bursts = "32";
hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST32);
} else if (hp->happy_bursts & DMA_BURST16) {
bursts = "16";
hme_write32(hp, gregs + GREG_CFG, GREG_CFG_BURST16);
} else {
bursts = "XXX";
hme_write32(hp, gregs + GREG_CFG, 0);
}
#endif /* CONFIG_SPARC */
HMD("old[%08x] bursts<%s>\n",
hme_read32(hp, gregs + GREG_CFG), bursts);
/* Turn off interrupts we do not want to hear. */
hme_write32(hp, gregs + GREG_IMASK,
(GREG_IMASK_GOTFRAME | GREG_IMASK_RCNTEXP |
GREG_IMASK_SENTFRAME | GREG_IMASK_TXPERR));
/* Set the transmit ring buffer size. */
HMD("tx rsize=%d oreg[%08x]\n", (int)TX_RING_SIZE,
hme_read32(hp, etxregs + ETX_RSIZE));
hme_write32(hp, etxregs + ETX_RSIZE, (TX_RING_SIZE >> ETX_RSIZE_SHIFT) - 1);
/* Enable transmitter DVMA. */
HMD("tx dma enable old[%08x]\n", hme_read32(hp, etxregs + ETX_CFG));
hme_write32(hp, etxregs + ETX_CFG,
hme_read32(hp, etxregs + ETX_CFG) | ETX_CFG_DMAENABLE);
/* This chip really rots, for the receiver sometimes when you
* write to its control registers not all the bits get there
* properly. I cannot think of a sane way to provide complete
* coverage for this hardware bug yet.
*/
HMD("erx regs bug old[%08x]\n",
hme_read32(hp, erxregs + ERX_CFG));
hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
regtmp = hme_read32(hp, erxregs + ERX_CFG);
hme_write32(hp, erxregs + ERX_CFG, ERX_CFG_DEFAULT(RX_OFFSET));
if (hme_read32(hp, erxregs + ERX_CFG) != ERX_CFG_DEFAULT(RX_OFFSET)) {
netdev_err(hp->dev,
"Eieee, rx config register gets greasy fries.\n");
netdev_err(hp->dev,
"Trying to set %08x, reread gives %08x\n",
ERX_CFG_DEFAULT(RX_OFFSET), regtmp);
/* XXX Should return failure here... */
}
/* Enable Big Mac hash table filter. */
HMD("enable hash rx_cfg_old[%08x]\n",
hme_read32(hp, bregs + BMAC_RXCFG));
rxcfg = BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_REJME;
if (hp->dev->flags & IFF_PROMISC)
rxcfg |= BIGMAC_RXCFG_PMISC;
hme_write32(hp, bregs + BMAC_RXCFG, rxcfg);
/* Let the bits settle in the chip. */
udelay(10);
/* Ok, configure the Big Mac transmitter. */
HMD("BIGMAC init\n");
regtmp = 0;
if (hp->happy_flags & HFLAG_FULL)
regtmp |= BIGMAC_TXCFG_FULLDPLX;
/* Don't turn on the "don't give up" bit for now. It could cause hme
* to deadlock with the PHY if a Jabber occurs.
*/
hme_write32(hp, bregs + BMAC_TXCFG, regtmp /*| BIGMAC_TXCFG_DGIVEUP*/);
/* Give up after 16 TX attempts. */
hme_write32(hp, bregs + BMAC_ALIMIT, 16);
/* Enable the output drivers no matter what. */
regtmp = BIGMAC_XCFG_ODENABLE;
/* If card can do lance mode, enable it. */
if (hp->happy_flags & HFLAG_LANCE)
regtmp |= (DEFAULT_IPG0 << 5) | BIGMAC_XCFG_LANCE;
/* Disable the MII buffers if using external transceiver. */
if (hp->tcvr_type == external)
regtmp |= BIGMAC_XCFG_MIIDISAB;
HMD("XIF config old[%08x]\n", hme_read32(hp, bregs + BMAC_XIFCFG));
hme_write32(hp, bregs + BMAC_XIFCFG, regtmp);
/* Start things up. */
HMD("tx old[%08x] and rx [%08x] ON!\n",
hme_read32(hp, bregs + BMAC_TXCFG),
hme_read32(hp, bregs + BMAC_RXCFG));
/* Set larger TX/RX size to allow for 802.1q */
hme_write32(hp, bregs + BMAC_TXMAX, ETH_FRAME_LEN + 8);
hme_write32(hp, bregs + BMAC_RXMAX, ETH_FRAME_LEN + 8);
hme_write32(hp, bregs + BMAC_TXCFG,
hme_read32(hp, bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE);
hme_write32(hp, bregs + BMAC_RXCFG,
hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE);
/* Get the autonegotiation started, and the watch timer ticking. */
happy_meal_begin_auto_negotiation(hp, tregs, NULL);
/* Success. */
return 0;
}
/* hp->happy_lock must be held */
static void happy_meal_set_initial_advertisement(struct happy_meal *hp)
{
void __iomem *tregs = hp->tcvregs;
void __iomem *bregs = hp->bigmacregs;
void __iomem *gregs = hp->gregs;
happy_meal_stop(hp, gregs);
hme_write32(hp, tregs + TCVR_IMASK, 0xffff);
if (hp->happy_flags & HFLAG_FENABLE)
hme_write32(hp, tregs + TCVR_CFG,
hme_read32(hp, tregs + TCVR_CFG) & ~(TCV_CFG_BENABLE));
else
hme_write32(hp, tregs + TCVR_CFG,
hme_read32(hp, tregs + TCVR_CFG) | TCV_CFG_BENABLE);
happy_meal_transceiver_check(hp, tregs);
switch(hp->tcvr_type) {
case none:
return;
case internal:
hme_write32(hp, bregs + BMAC_XIFCFG, 0);
break;
case external:
hme_write32(hp, bregs + BMAC_XIFCFG, BIGMAC_XCFG_MIIDISAB);
break;
}
if (happy_meal_tcvr_reset(hp, tregs))
return;
/* Latch PHY registers as of now. */
hp->sw_bmsr = happy_meal_tcvr_read(hp, tregs, MII_BMSR);
hp->sw_advertise = happy_meal_tcvr_read(hp, tregs, MII_ADVERTISE);
/* Advertise everything we can support. */
if (hp->sw_bmsr & BMSR_10HALF)
hp->sw_advertise |= (ADVERTISE_10HALF);
else
hp->sw_advertise &= ~(ADVERTISE_10HALF);
if (hp->sw_bmsr & BMSR_10FULL)
hp->sw_advertise |= (ADVERTISE_10FULL);
else
hp->sw_advertise &= ~(ADVERTISE_10FULL);
if (hp->sw_bmsr & BMSR_100HALF)
hp->sw_advertise |= (ADVERTISE_100HALF);
else
hp->sw_advertise &= ~(ADVERTISE_100HALF);
if (hp->sw_bmsr & BMSR_100FULL)
hp->sw_advertise |= (ADVERTISE_100FULL);
else
hp->sw_advertise &= ~(ADVERTISE_100FULL);
/* Update the PHY advertisement register. */
happy_meal_tcvr_write(hp, tregs, MII_ADVERTISE, hp->sw_advertise);
}
/* Once status is latched (by happy_meal_interrupt) it is cleared by
* the hardware, so we cannot re-read it and get a correct value.
*
* hp->happy_lock must be held
*/
static int happy_meal_is_not_so_happy(struct happy_meal *hp, u32 status)
{
int reset = 0;
/* Only print messages for non-counter related interrupts. */
if (status & (GREG_STAT_STSTERR | GREG_STAT_TFIFO_UND |
GREG_STAT_MAXPKTERR | GREG_STAT_RXERR |
GREG_STAT_RXPERR | GREG_STAT_RXTERR | GREG_STAT_EOPERR |
GREG_STAT_MIFIRQ | GREG_STAT_TXEACK | GREG_STAT_TXLERR |
GREG_STAT_TXPERR | GREG_STAT_TXTERR | GREG_STAT_SLVERR |
GREG_STAT_SLVPERR))
netdev_err(hp->dev,
"Error interrupt for happy meal, status = %08x\n",
status);
if (status & GREG_STAT_RFIFOVF) {
/* Receive FIFO overflow is harmless and the hardware will take
care of it, just some packets are lost. Who cares. */
netdev_dbg(hp->dev, "Happy Meal receive FIFO overflow.\n");
}
if (status & GREG_STAT_STSTERR) {
/* BigMAC SQE link test failed. */
netdev_err(hp->dev, "Happy Meal BigMAC SQE test failed.\n");
reset = 1;
}
if (status & GREG_STAT_TFIFO_UND) {
/* Transmit FIFO underrun, again DMA error likely. */
netdev_err(hp->dev,
"Happy Meal transmitter FIFO underrun, DMA error.\n");
reset = 1;
}
if (status & GREG_STAT_MAXPKTERR) {
/* Driver error, tried to transmit something larger
* than ethernet max mtu.
*/
netdev_err(hp->dev, "Happy Meal MAX Packet size error.\n");
reset = 1;
}
if (status & GREG_STAT_NORXD) {
/* This is harmless, it just means the system is
* quite loaded and the incoming packet rate was
* faster than the interrupt handler could keep up
* with.
*/
netdev_info(hp->dev,
"Happy Meal out of receive descriptors, packet dropped.\n");
}
if (status & (GREG_STAT_RXERR|GREG_STAT_RXPERR|GREG_STAT_RXTERR)) {
/* All sorts of DMA receive errors. */
netdev_err(hp->dev, "Happy Meal rx DMA errors [ %s%s%s]\n",
status & GREG_STAT_RXERR ? "GenericError " : "",
status & GREG_STAT_RXPERR ? "ParityError " : "",
status & GREG_STAT_RXTERR ? "RxTagBotch " : "");
reset = 1;
}
if (status & GREG_STAT_EOPERR) {
/* Driver bug, didn't set EOP bit in tx descriptor given
* to the happy meal.
*/
netdev_err(hp->dev,
"EOP not set in happy meal transmit descriptor!\n");
reset = 1;
}
if (status & GREG_STAT_MIFIRQ) {
/* MIF signalled an interrupt, were we polling it? */
netdev_err(hp->dev, "Happy Meal MIF interrupt.\n");
}
if (status &
(GREG_STAT_TXEACK|GREG_STAT_TXLERR|GREG_STAT_TXPERR|GREG_STAT_TXTERR)) {
/* All sorts of transmit DMA errors. */
netdev_err(hp->dev, "Happy Meal tx DMA errors [ %s%s%s%s]\n",
status & GREG_STAT_TXEACK ? "GenericError " : "",
status & GREG_STAT_TXLERR ? "LateError " : "",
status & GREG_STAT_TXPERR ? "ParityError " : "",
status & GREG_STAT_TXTERR ? "TagBotch " : "");
reset = 1;
}
if (status & (GREG_STAT_SLVERR|GREG_STAT_SLVPERR)) {
/* Bus or parity error when cpu accessed happy meal registers
* or it's internal FIFO's. Should never see this.
*/
netdev_err(hp->dev,
"Happy Meal register access SBUS slave (%s) error.\n",
(status & GREG_STAT_SLVPERR) ? "parity" : "generic");
reset = 1;
}
if (reset) {
netdev_notice(hp->dev, "Resetting...\n");
happy_meal_init(hp);
return 1;
}
return 0;
}
/* hp->happy_lock must be held */
static void happy_meal_mif_interrupt(struct happy_meal *hp)
{
void __iomem *tregs = hp->tcvregs;
netdev_info(hp->dev, "Link status change.\n");
hp->sw_bmcr = happy_meal_tcvr_read(hp, tregs, MII_BMCR);
hp->sw_lpa = happy_meal_tcvr_read(hp, tregs, MII_LPA);
/* Use the fastest transmission protocol possible. */
if (hp->sw_lpa & LPA_100FULL) {
netdev_info(hp->dev, "Switching to 100Mbps at full duplex.\n");
hp->sw_bmcr |= (BMCR_FULLDPLX | BMCR_SPEED100);
} else if (hp->sw_lpa & LPA_100HALF) {
netdev_info(hp->dev, "Switching to 100MBps at half duplex.\n");
hp->sw_bmcr |= BMCR_SPEED100;
} else if (hp->sw_lpa & LPA_10FULL) {
netdev_info(hp->dev, "Switching to 10MBps at full duplex.\n");
hp->sw_bmcr |= BMCR_FULLDPLX;
} else {
netdev_info(hp->dev, "Using 10Mbps at half duplex.\n");
}
happy_meal_tcvr_write(hp, tregs, MII_BMCR, hp->sw_bmcr);
/* Finally stop polling and shut up the MIF. */
happy_meal_poll_stop(hp, tregs);
}
/* hp->happy_lock must be held */
static void happy_meal_tx(struct happy_meal *hp)
{
struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
struct happy_meal_txd *this;
struct net_device *dev = hp->dev;
int elem;
elem = hp->tx_old;
while (elem != hp->tx_new) {
struct sk_buff *skb;
u32 flags, dma_addr, dma_len;
int frag;
netdev_vdbg(hp->dev, "TX[%d]\n", elem);
this = &txbase[elem];
flags = hme_read_desc32(hp, &this->tx_flags);
if (flags & TXFLAG_OWN)
break;
skb = hp->tx_skbs[elem];
if (skb_shinfo(skb)->nr_frags) {
int last;
last = elem + skb_shinfo(skb)->nr_frags;
last &= (TX_RING_SIZE - 1);
flags = hme_read_desc32(hp, &txbase[last].tx_flags);
if (flags & TXFLAG_OWN)
break;
}
hp->tx_skbs[elem] = NULL;
dev->stats.tx_bytes += skb->len;
for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) {
dma_addr = hme_read_desc32(hp, &this->tx_addr);
dma_len = hme_read_desc32(hp, &this->tx_flags);
dma_len &= TXFLAG_SIZE;
if (!frag)
dma_unmap_single(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
else
dma_unmap_page(hp->dma_dev, dma_addr, dma_len, DMA_TO_DEVICE);
elem = NEXT_TX(elem);
this = &txbase[elem];
}
dev_consume_skb_irq(skb);
dev->stats.tx_packets++;
}
hp->tx_old = elem;
if (netif_queue_stopped(dev) &&
TX_BUFFS_AVAIL(hp) > (MAX_SKB_FRAGS + 1))
netif_wake_queue(dev);
}
/* Originally I used to handle the allocation failure by just giving back just
* that one ring buffer to the happy meal. Problem is that usually when that
* condition is triggered, the happy meal expects you to do something reasonable
* with all of the packets it has DMA'd in. So now I just drop the entire
* ring when we cannot get a new skb and give them all back to the happy meal,
* maybe things will be "happier" now.
*
* hp->happy_lock must be held
*/
static void happy_meal_rx(struct happy_meal *hp, struct net_device *dev)
{
struct happy_meal_rxd *rxbase = &hp->happy_block->happy_meal_rxd[0];
struct happy_meal_rxd *this;
int elem = hp->rx_new, drops = 0;
u32 flags;
this = &rxbase[elem];
while (!((flags = hme_read_desc32(hp, &this->rx_flags)) & RXFLAG_OWN)) {
struct sk_buff *skb;
int len = flags >> 16;
u16 csum = flags & RXFLAG_CSUM;
u32 dma_addr = hme_read_desc32(hp, &this->rx_addr);
/* Check for errors. */
if ((len < ETH_ZLEN) || (flags & RXFLAG_OVERFLOW)) {
netdev_vdbg(dev, "RX[%d ERR(%08x)]", elem, flags);
dev->stats.rx_errors++;
if (len < ETH_ZLEN)
dev->stats.rx_length_errors++;
if (len & (RXFLAG_OVERFLOW >> 16)) {
dev->stats.rx_over_errors++;
dev->stats.rx_fifo_errors++;
}
/* Return it to the Happy meal. */
drop_it:
dev->stats.rx_dropped++;
hme_write_rxd(hp, this,
(RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
dma_addr);
goto next;
}
skb = hp->rx_skbs[elem];
if (len > RX_COPY_THRESHOLD) {
struct sk_buff *new_skb;
u32 mapping;
/* Now refill the entry, if we can. */
new_skb = happy_meal_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
if (new_skb == NULL) {
drops++;
goto drop_it;
}
skb_put(new_skb, (ETH_FRAME_LEN + RX_OFFSET + 4));
mapping = dma_map_single(hp->dma_dev, new_skb->data,
RX_BUF_ALLOC_SIZE,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(hp->dma_dev, mapping))) {
dev_kfree_skb_any(new_skb);
drops++;
goto drop_it;
}
dma_unmap_single(hp->dma_dev, dma_addr, RX_BUF_ALLOC_SIZE, DMA_FROM_DEVICE);
hp->rx_skbs[elem] = new_skb;
hme_write_rxd(hp, this,
(RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
mapping);
skb_reserve(new_skb, RX_OFFSET);
/* Trim the original skb for the netif. */
skb_trim(skb, len);
} else {
struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2);
if (copy_skb == NULL) {
drops++;
goto drop_it;
}
skb_reserve(copy_skb, 2);
skb_put(copy_skb, len);
dma_sync_single_for_cpu(hp->dma_dev, dma_addr, len + 2, DMA_FROM_DEVICE);
skb_copy_from_linear_data(skb, copy_skb->data, len);
dma_sync_single_for_device(hp->dma_dev, dma_addr, len + 2, DMA_FROM_DEVICE);
/* Reuse original ring buffer. */
hme_write_rxd(hp, this,
(RXFLAG_OWN|((RX_BUF_ALLOC_SIZE-RX_OFFSET)<<16)),
dma_addr);
skb = copy_skb;
}
/* This card is _fucking_ hot... */
skb->csum = csum_unfold(~(__force __sum16)htons(csum));
skb->ip_summed = CHECKSUM_COMPLETE;
netdev_vdbg(dev, "RX[%d len=%d csum=%4x]", elem, len, csum);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
next:
elem = NEXT_RX(elem);
this = &rxbase[elem];
}
hp->rx_new = elem;
if (drops)
netdev_info(hp->dev, "Memory squeeze, deferring packet.\n");
}
static irqreturn_t happy_meal_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct happy_meal *hp = netdev_priv(dev);
u32 happy_status = hme_read32(hp, hp->gregs + GREG_STAT);
HMD("status=%08x\n", happy_status);
spin_lock(&hp->happy_lock);
if (happy_status & GREG_STAT_ERRORS) {
if (happy_meal_is_not_so_happy(hp, /* un- */ happy_status))
goto out;
}
if (happy_status & GREG_STAT_MIFIRQ)
happy_meal_mif_interrupt(hp);
if (happy_status & GREG_STAT_TXALL)
happy_meal_tx(hp);
if (happy_status & GREG_STAT_RXTOHOST)
happy_meal_rx(hp, dev);
HMD("done\n");
out:
spin_unlock(&hp->happy_lock);
return IRQ_HANDLED;
}
#ifdef CONFIG_SBUS
static irqreturn_t quattro_sbus_interrupt(int irq, void *cookie)
{
struct quattro *qp = (struct quattro *) cookie;
int i;
for (i = 0; i < 4; i++) {
struct net_device *dev = qp->happy_meals[i];
struct happy_meal *hp = netdev_priv(dev);
u32 happy_status = hme_read32(hp, hp->gregs + GREG_STAT);
HMD("status=%08x\n", happy_status);
if (!(happy_status & (GREG_STAT_ERRORS |
GREG_STAT_MIFIRQ |
GREG_STAT_TXALL |
GREG_STAT_RXTOHOST)))
continue;
spin_lock(&hp->happy_lock);
if (happy_status & GREG_STAT_ERRORS)
if (happy_meal_is_not_so_happy(hp, happy_status))
goto next;
if (happy_status & GREG_STAT_MIFIRQ)
happy_meal_mif_interrupt(hp);
if (happy_status & GREG_STAT_TXALL)
happy_meal_tx(hp);
if (happy_status & GREG_STAT_RXTOHOST)
happy_meal_rx(hp, dev);
next:
spin_unlock(&hp->happy_lock);
}
HMD("done\n");
return IRQ_HANDLED;
}
#endif
static int happy_meal_open(struct net_device *dev)
{
struct happy_meal *hp = netdev_priv(dev);
int res;
/* On SBUS Quattro QFE cards, all hme interrupts are concentrated
* into a single source which we register handling at probe time.
*/
if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO) {
res = request_irq(hp->irq, happy_meal_interrupt, IRQF_SHARED,
dev->name, dev);
if (res) {
HMD("EAGAIN\n");
netdev_err(dev, "Can't order irq %d to go.\n", hp->irq);
return -EAGAIN;
}
}
HMD("to happy_meal_init\n");
spin_lock_irq(&hp->happy_lock);
res = happy_meal_init(hp);
spin_unlock_irq(&hp->happy_lock);
if (res && ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO))
free_irq(hp->irq, dev);
return res;
}
static int happy_meal_close(struct net_device *dev)
{
struct happy_meal *hp = netdev_priv(dev);
spin_lock_irq(&hp->happy_lock);
happy_meal_stop(hp, hp->gregs);
happy_meal_clean_rings(hp);
/* If auto-negotiation timer is running, kill it. */
del_timer(&hp->happy_timer);
spin_unlock_irq(&hp->happy_lock);
/* On Quattro QFE cards, all hme interrupts are concentrated
* into a single source which we register handling at probe
* time and never unregister.
*/
if ((hp->happy_flags & (HFLAG_QUATTRO|HFLAG_PCI)) != HFLAG_QUATTRO)
free_irq(hp->irq, dev);
return 0;
}
static void happy_meal_tx_timeout(struct net_device *dev, unsigned int txqueue)
{
struct happy_meal *hp = netdev_priv(dev);
netdev_err(dev, "transmit timed out, resetting\n");
tx_dump_log();
netdev_err(dev, "Happy Status %08x TX[%08x:%08x]\n",
hme_read32(hp, hp->gregs + GREG_STAT),
hme_read32(hp, hp->etxregs + ETX_CFG),
hme_read32(hp, hp->bigmacregs + BMAC_TXCFG));
spin_lock_irq(&hp->happy_lock);
happy_meal_init(hp);
spin_unlock_irq(&hp->happy_lock);
netif_wake_queue(dev);
}
static void unmap_partial_tx_skb(struct happy_meal *hp, u32 first_mapping,
u32 first_len, u32 first_entry, u32 entry)
{
struct happy_meal_txd *txbase = &hp->happy_block->happy_meal_txd[0];
dma_unmap_single(hp->dma_dev, first_mapping, first_len, DMA_TO_DEVICE);
first_entry = NEXT_TX(first_entry);
while (first_entry != entry) {
struct happy_meal_txd *this = &txbase[first_entry];
u32 addr, len;
addr = hme_read_desc32(hp, &this->tx_addr);
len = hme_read_desc32(hp, &this->tx_flags);
len &= TXFLAG_SIZE;
dma_unmap_page(hp->dma_dev, addr, len, DMA_TO_DEVICE);
}
}
static netdev_tx_t happy_meal_start_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct happy_meal *hp = netdev_priv(dev);
int entry;
u32 tx_flags;
tx_flags = TXFLAG_OWN;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
const u32 csum_start_off = skb_checksum_start_offset(skb);
const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |
((csum_stuff_off << 20) & TXFLAG_CSLOCATION));
}
spin_lock_irq(&hp->happy_lock);
if (TX_BUFFS_AVAIL(hp) <= (skb_shinfo(skb)->nr_frags + 1)) {
netif_stop_queue(dev);
spin_unlock_irq(&hp->happy_lock);
netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
return NETDEV_TX_BUSY;
}
entry = hp->tx_new;
netdev_vdbg(dev, "SX<l[%d]e[%d]>\n", skb->len, entry);
hp->tx_skbs[entry] = skb;
if (skb_shinfo(skb)->nr_frags == 0) {
u32 mapping, len;
len = skb->len;
mapping = dma_map_single(hp->dma_dev, skb->data, len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(hp->dma_dev, mapping)))
goto out_dma_error;
tx_flags |= (TXFLAG_SOP | TXFLAG_EOP);
hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
(tx_flags | (len & TXFLAG_SIZE)),
mapping);
entry = NEXT_TX(entry);
} else {
u32 first_len, first_mapping;
int frag, first_entry = entry;
/* We must give this initial chunk to the device last.
* Otherwise we could race with the device.
*/
first_len = skb_headlen(skb);
first_mapping = dma_map_single(hp->dma_dev, skb->data, first_len,
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(hp->dma_dev, first_mapping)))
goto out_dma_error;
entry = NEXT_TX(entry);
for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
u32 len, mapping, this_txflags;
len = skb_frag_size(this_frag);
mapping = skb_frag_dma_map(hp->dma_dev, this_frag,
0, len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(hp->dma_dev, mapping))) {
unmap_partial_tx_skb(hp, first_mapping, first_len,
first_entry, entry);
goto out_dma_error;
}
this_txflags = tx_flags;
if (frag == skb_shinfo(skb)->nr_frags - 1)
this_txflags |= TXFLAG_EOP;
hme_write_txd(hp, &hp->happy_block->happy_meal_txd[entry],
(this_txflags | (len & TXFLAG_SIZE)),
mapping);
entry = NEXT_TX(entry);
}
hme_write_txd(hp, &hp->happy_block->happy_meal_txd[first_entry],
(tx_flags | TXFLAG_SOP | (first_len & TXFLAG_SIZE)),
first_mapping);
}
hp->tx_new = entry;
if (TX_BUFFS_AVAIL(hp) <= (MAX_SKB_FRAGS + 1))
netif_stop_queue(dev);
/* Get it going. */
hme_write32(hp, hp->etxregs + ETX_PENDING, ETX_TP_DMAWAKEUP);
spin_unlock_irq(&hp->happy_lock);
tx_add_log(hp, TXLOG_ACTION_TXMIT, 0);
return NETDEV_TX_OK;
out_dma_error:
hp->tx_skbs[hp->tx_new] = NULL;
spin_unlock_irq(&hp->happy_lock);
dev_kfree_skb_any(skb);
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
static struct net_device_stats *happy_meal_get_stats(struct net_device *dev)
{
struct happy_meal *hp = netdev_priv(dev);
spin_lock_irq(&hp->happy_lock);
happy_meal_get_counters(hp, hp->bigmacregs);
spin_unlock_irq(&hp->happy_lock);
return &dev->stats;
}
static void happy_meal_set_multicast(struct net_device *dev)
{
struct happy_meal *hp = netdev_priv(dev);
void __iomem *bregs = hp->bigmacregs;
struct netdev_hw_addr *ha;
u32 crc;
spin_lock_irq(&hp->happy_lock);
if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
hme_write32(hp, bregs + BMAC_HTABLE0, 0xffff);
hme_write32(hp, bregs + BMAC_HTABLE1, 0xffff);
hme_write32(hp, bregs + BMAC_HTABLE2, 0xffff);
hme_write32(hp, bregs + BMAC_HTABLE3, 0xffff);
} else if (dev->flags & IFF_PROMISC) {
hme_write32(hp, bregs + BMAC_RXCFG,
hme_read32(hp, bregs + BMAC_RXCFG) | BIGMAC_RXCFG_PMISC);
} else {
u16 hash_table[4];
memset(hash_table, 0, sizeof(hash_table));
netdev_for_each_mc_addr(ha, dev) {
crc = ether_crc_le(6, ha->addr);
crc >>= 26;
hash_table[crc >> 4] |= 1 << (crc & 0xf);
}
hme_write32(hp, bregs + BMAC_HTABLE0, hash_table[0]);
hme_write32(hp, bregs + BMAC_HTABLE1, hash_table[1]);
hme_write32(hp, bregs + BMAC_HTABLE2, hash_table[2]);
hme_write32(hp, bregs + BMAC_HTABLE3, hash_table[3]);
}
spin_unlock_irq(&hp->happy_lock);
}
/* Ethtool support... */
static int hme_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct happy_meal *hp = netdev_priv(dev);
u32 speed;
u32 supported;
supported =
(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
/* XXX hardcoded stuff for now */
cmd->base.port = PORT_TP; /* XXX no MII support */
cmd->base.phy_address = 0; /* XXX fixed PHYAD */
/* Record PHY settings. */
spin_lock_irq(&hp->happy_lock);
hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
hp->sw_lpa = happy_meal_tcvr_read(hp, hp->tcvregs, MII_LPA);
spin_unlock_irq(&hp->happy_lock);
if (hp->sw_bmcr & BMCR_ANENABLE) {
cmd->base.autoneg = AUTONEG_ENABLE;
speed = ((hp->sw_lpa & (LPA_100HALF | LPA_100FULL)) ?
SPEED_100 : SPEED_10);
if (speed == SPEED_100)
cmd->base.duplex =
(hp->sw_lpa & (LPA_100FULL)) ?
DUPLEX_FULL : DUPLEX_HALF;
else
cmd->base.duplex =
(hp->sw_lpa & (LPA_10FULL)) ?
DUPLEX_FULL : DUPLEX_HALF;
} else {
cmd->base.autoneg = AUTONEG_DISABLE;
speed = (hp->sw_bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10;
cmd->base.duplex =
(hp->sw_bmcr & BMCR_FULLDPLX) ?
DUPLEX_FULL : DUPLEX_HALF;
}
cmd->base.speed = speed;
ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
supported);
return 0;
}
static int hme_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct happy_meal *hp = netdev_priv(dev);
/* Verify the settings we care about. */
if (cmd->base.autoneg != AUTONEG_ENABLE &&
cmd->base.autoneg != AUTONEG_DISABLE)
return -EINVAL;
if (cmd->base.autoneg == AUTONEG_DISABLE &&
((cmd->base.speed != SPEED_100 &&
cmd->base.speed != SPEED_10) ||
(cmd->base.duplex != DUPLEX_HALF &&
cmd->base.duplex != DUPLEX_FULL)))
return -EINVAL;
/* Ok, do it to it. */
spin_lock_irq(&hp->happy_lock);
del_timer(&hp->happy_timer);
happy_meal_begin_auto_negotiation(hp, hp->tcvregs, cmd);
spin_unlock_irq(&hp->happy_lock);
return 0;
}
static void hme_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct happy_meal *hp = netdev_priv(dev);
strscpy(info->driver, DRV_NAME, sizeof(info->driver));
if (hp->happy_flags & HFLAG_PCI) {
struct pci_dev *pdev = hp->happy_dev;
strscpy(info->bus_info, pci_name(pdev), sizeof(info->bus_info));
}
#ifdef CONFIG_SBUS
else {
const struct linux_prom_registers *regs;
struct platform_device *op = hp->happy_dev;
regs = of_get_property(op->dev.of_node, "regs", NULL);
if (regs)
snprintf(info->bus_info, sizeof(info->bus_info),
"SBUS:%d",
regs->which_io);
}
#endif
}
static u32 hme_get_link(struct net_device *dev)
{
struct happy_meal *hp = netdev_priv(dev);
spin_lock_irq(&hp->happy_lock);
hp->sw_bmcr = happy_meal_tcvr_read(hp, hp->tcvregs, MII_BMCR);
spin_unlock_irq(&hp->happy_lock);
return hp->sw_bmsr & BMSR_LSTATUS;
}
static const struct ethtool_ops hme_ethtool_ops = {
.get_drvinfo = hme_get_drvinfo,
.get_link = hme_get_link,
.get_link_ksettings = hme_get_link_ksettings,
.set_link_ksettings = hme_set_link_ksettings,
};
#ifdef CONFIG_SBUS
/* Given a happy meal sbus device, find it's quattro parent.
* If none exist, allocate and return a new one.
*
* Return NULL on failure.
*/
static struct quattro *quattro_sbus_find(struct platform_device *child)
{
struct device *parent = child->dev.parent;
struct platform_device *op;
struct quattro *qp;
op = to_platform_device(parent);
qp = platform_get_drvdata(op);
if (qp)
return qp;
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
if (!qp)
return NULL;
qp->quattro_dev = child;
qp->next = qfe_sbus_list;
qfe_sbus_list = qp;
platform_set_drvdata(op, qp);
return qp;
}
/* After all quattro cards have been probed, we call these functions
* to register the IRQ handlers for the cards that have been
* successfully probed and skip the cards that failed to initialize
*/
static int __init quattro_sbus_register_irqs(void)
{
struct quattro *qp;
for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
struct platform_device *op = qp->quattro_dev;
int err, qfe_slot, skip = 0;
for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
if (!qp->happy_meals[qfe_slot])
skip = 1;
}
if (skip)
continue;
err = request_irq(op->archdata.irqs[0],
quattro_sbus_interrupt,
IRQF_SHARED, "Quattro",
qp);
if (err != 0) {
dev_err(&op->dev,
"Quattro HME: IRQ registration error %d.\n",
err);
return err;
}
}
return 0;
}
static void quattro_sbus_free_irqs(void)
{
struct quattro *qp;
for (qp = qfe_sbus_list; qp != NULL; qp = qp->next) {
struct platform_device *op = qp->quattro_dev;
int qfe_slot, skip = 0;
for (qfe_slot = 0; qfe_slot < 4; qfe_slot++) {
if (!qp->happy_meals[qfe_slot])
skip = 1;
}
if (skip)
continue;
free_irq(op->archdata.irqs[0], qp);
}
}
#endif /* CONFIG_SBUS */
#ifdef CONFIG_PCI
static struct quattro *quattro_pci_find(struct pci_dev *pdev)
{
int i;
struct pci_dev *bdev = pdev->bus->self;
struct quattro *qp;
if (!bdev)
return ERR_PTR(-ENODEV);
for (qp = qfe_pci_list; qp != NULL; qp = qp->next) {
struct pci_dev *qpdev = qp->quattro_dev;
if (qpdev == bdev)
return qp;
}
qp = kmalloc(sizeof(struct quattro), GFP_KERNEL);
if (!qp)
return ERR_PTR(-ENOMEM);
for (i = 0; i < 4; i++)
qp->happy_meals[i] = NULL;
qp->quattro_dev = bdev;
qp->next = qfe_pci_list;
qfe_pci_list = qp;
/* No range tricks necessary on PCI. */
qp->nranges = 0;
return qp;
}
#endif /* CONFIG_PCI */
static const struct net_device_ops hme_netdev_ops = {
.ndo_open = happy_meal_open,
.ndo_stop = happy_meal_close,
.ndo_start_xmit = happy_meal_start_xmit,
.ndo_tx_timeout = happy_meal_tx_timeout,
.ndo_get_stats = happy_meal_get_stats,
.ndo_set_rx_mode = happy_meal_set_multicast,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
#ifdef CONFIG_SBUS
static int happy_meal_sbus_probe_one(struct platform_device *op, int is_qfe)
{
struct device_node *dp = op->dev.of_node, *sbus_dp;
struct quattro *qp = NULL;
struct happy_meal *hp;
struct net_device *dev;
int i, qfe_slot = -1;
u8 addr[ETH_ALEN];
int err = -ENODEV;
sbus_dp = op->dev.parent->of_node;
/* We can match PCI devices too, do not accept those here. */
if (!of_node_name_eq(sbus_dp, "sbus") && !of_node_name_eq(sbus_dp, "sbi"))
return err;
if (is_qfe) {
qp = quattro_sbus_find(op);
if (qp == NULL)
goto err_out;
for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
if (qp->happy_meals[qfe_slot] == NULL)
break;
if (qfe_slot == 4)
goto err_out;
}
err = -ENOMEM;
dev = alloc_etherdev(sizeof(struct happy_meal));
if (!dev)
goto err_out;
SET_NETDEV_DEV(dev, &op->dev);
/* If user did not specify a MAC address specifically, use
* the Quattro local-mac-address property...
*/
for (i = 0; i < 6; i++) {
if (macaddr[i] != 0)
break;
}
if (i < 6) { /* a mac address was given */
for (i = 0; i < 6; i++)
addr[i] = macaddr[i];
eth_hw_addr_set(dev, addr);
macaddr[5]++;
} else {
const unsigned char *addr;
int len;
addr = of_get_property(dp, "local-mac-address", &len);
if (qfe_slot != -1 && addr && len == ETH_ALEN)
eth_hw_addr_set(dev, addr);
else
eth_hw_addr_set(dev, idprom->id_ethaddr);
}
hp = netdev_priv(dev);
hp->happy_dev = op;
hp->dma_dev = &op->dev;
spin_lock_init(&hp->happy_lock);
err = -ENODEV;
if (qp != NULL) {
hp->qfe_parent = qp;
hp->qfe_ent = qfe_slot;
qp->happy_meals[qfe_slot] = dev;
}
hp->gregs = of_ioremap(&op->resource[0], 0,
GREG_REG_SIZE, "HME Global Regs");
if (!hp->gregs) {
dev_err(&op->dev, "Cannot map global registers.\n");
goto err_out_free_netdev;
}
hp->etxregs = of_ioremap(&op->resource[1], 0,
ETX_REG_SIZE, "HME TX Regs");
if (!hp->etxregs) {
dev_err(&op->dev, "Cannot map MAC TX registers.\n");
goto err_out_iounmap;
}
hp->erxregs = of_ioremap(&op->resource[2], 0,
ERX_REG_SIZE, "HME RX Regs");
if (!hp->erxregs) {
dev_err(&op->dev, "Cannot map MAC RX registers.\n");
goto err_out_iounmap;
}
hp->bigmacregs = of_ioremap(&op->resource[3], 0,
BMAC_REG_SIZE, "HME BIGMAC Regs");
if (!hp->bigmacregs) {
dev_err(&op->dev, "Cannot map BIGMAC registers.\n");
goto err_out_iounmap;
}
hp->tcvregs = of_ioremap(&op->resource[4], 0,
TCVR_REG_SIZE, "HME Tranceiver Regs");
if (!hp->tcvregs) {
dev_err(&op->dev, "Cannot map TCVR registers.\n");
goto err_out_iounmap;
}
hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
if (hp->hm_revision == 0xff)
hp->hm_revision = 0xa0;
/* Now enable the feature flags we can. */
if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
hp->happy_flags = HFLAG_20_21;
else if (hp->hm_revision != 0xa0)
hp->happy_flags = HFLAG_NOT_A0;
if (qp != NULL)
hp->happy_flags |= HFLAG_QUATTRO;
/* Get the supported DVMA burst sizes from our Happy SBUS. */
hp->happy_bursts = of_getintprop_default(sbus_dp,
"burst-sizes", 0x00);
hp->happy_block = dma_alloc_coherent(hp->dma_dev,
PAGE_SIZE,
&hp->hblock_dvma,
GFP_ATOMIC);
err = -ENOMEM;
if (!hp->happy_block)
goto err_out_iounmap;
/* Force check of the link first time we are brought up. */
hp->linkcheck = 0;
/* Force timer state to 'asleep' with count of zero. */
hp->timer_state = asleep;
hp->timer_ticks = 0;
timer_setup(&hp->happy_timer, happy_meal_timer, 0);
hp->dev = dev;
dev->netdev_ops = &hme_netdev_ops;
dev->watchdog_timeo = 5*HZ;
dev->ethtool_ops = &hme_ethtool_ops;
/* Happy Meal can do it all... */
dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
dev->features |= dev->hw_features | NETIF_F_RXCSUM;
hp->irq = op->archdata.irqs[0];
#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
/* Hook up SBUS register/descriptor accessors. */
hp->read_desc32 = sbus_hme_read_desc32;
hp->write_txd = sbus_hme_write_txd;
hp->write_rxd = sbus_hme_write_rxd;
hp->read32 = sbus_hme_read32;
hp->write32 = sbus_hme_write32;
#endif
/* Grrr, Happy Meal comes up by default not advertising
* full duplex 100baseT capabilities, fix this.
*/
spin_lock_irq(&hp->happy_lock);
happy_meal_set_initial_advertisement(hp);
spin_unlock_irq(&hp->happy_lock);
err = register_netdev(hp->dev);
if (err) {
dev_err(&op->dev, "Cannot register net device, aborting.\n");
goto err_out_free_coherent;
}
platform_set_drvdata(op, hp);
if (qfe_slot != -1)
netdev_info(dev,
"Quattro HME slot %d (SBUS) 10/100baseT Ethernet %pM\n",
qfe_slot, dev->dev_addr);
else
netdev_info(dev, "HAPPY MEAL (SBUS) 10/100baseT Ethernet %pM\n",
dev->dev_addr);
return 0;
err_out_free_coherent:
dma_free_coherent(hp->dma_dev,
PAGE_SIZE,
hp->happy_block,
hp->hblock_dvma);
err_out_iounmap:
if (hp->gregs)
of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
if (hp->etxregs)
of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
if (hp->erxregs)
of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
if (hp->bigmacregs)
of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
if (hp->tcvregs)
of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
if (qp)
qp->happy_meals[qfe_slot] = NULL;
err_out_free_netdev:
free_netdev(dev);
err_out:
return err;
}
#endif
#ifdef CONFIG_PCI
#ifndef CONFIG_SPARC
static int is_quattro_p(struct pci_dev *pdev)
{
struct pci_dev *busdev = pdev->bus->self;
struct pci_dev *this_pdev;
int n_hmes;
if (busdev == NULL ||
busdev->vendor != PCI_VENDOR_ID_DEC ||
busdev->device != PCI_DEVICE_ID_DEC_21153)
return 0;
n_hmes = 0;
list_for_each_entry(this_pdev, &pdev->bus->devices, bus_list) {
if (this_pdev->vendor == PCI_VENDOR_ID_SUN &&
this_pdev->device == PCI_DEVICE_ID_SUN_HAPPYMEAL)
n_hmes++;
}
if (n_hmes != 4)
return 0;
return 1;
}
/* Fetch MAC address from vital product data of PCI ROM. */
static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, int index, unsigned char *dev_addr)
{
int this_offset;
for (this_offset = 0x20; this_offset < len; this_offset++) {
void __iomem *p = rom_base + this_offset;
if (readb(p + 0) != 0x90 ||
readb(p + 1) != 0x00 ||
readb(p + 2) != 0x09 ||
readb(p + 3) != 0x4e ||
readb(p + 4) != 0x41 ||
readb(p + 5) != 0x06)
continue;
this_offset += 6;
p += 6;
if (index == 0) {
int i;
for (i = 0; i < 6; i++)
dev_addr[i] = readb(p + i);
return 1;
}
index--;
}
return 0;
}
static void get_hme_mac_nonsparc(struct pci_dev *pdev, unsigned char *dev_addr)
{
size_t size;
void __iomem *p = pci_map_rom(pdev, &size);
if (p) {
int index = 0;
int found;
if (is_quattro_p(pdev))
index = PCI_SLOT(pdev->devfn);
found = readb(p) == 0x55 &&
readb(p + 1) == 0xaa &&
find_eth_addr_in_vpd(p, (64 * 1024), index, dev_addr);
pci_unmap_rom(pdev, p);
if (found)
return;
}
/* Sun MAC prefix then 3 random bytes. */
dev_addr[0] = 0x08;
dev_addr[1] = 0x00;
dev_addr[2] = 0x20;
get_random_bytes(&dev_addr[3], 3);
}
#endif /* !(CONFIG_SPARC) */
static int happy_meal_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct quattro *qp = NULL;
#ifdef CONFIG_SPARC
struct device_node *dp;
#endif
struct happy_meal *hp;
struct net_device *dev;
void __iomem *hpreg_base;
struct resource *hpreg_res;
int i, qfe_slot = -1;
char prom_name[64];
u8 addr[ETH_ALEN];
int err = -ENODEV;
/* Now make sure pci_dev cookie is there. */
#ifdef CONFIG_SPARC
dp = pci_device_to_OF_node(pdev);
snprintf(prom_name, sizeof(prom_name), "%pOFn", dp);
#else
if (is_quattro_p(pdev))
strcpy(prom_name, "SUNW,qfe");
else
strcpy(prom_name, "SUNW,hme");
#endif
err = pcim_enable_device(pdev);
if (err)
goto err_out;
pci_set_master(pdev);
if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
qp = quattro_pci_find(pdev);
if (IS_ERR(qp)) {
err = PTR_ERR(qp);
goto err_out;
}
for (qfe_slot = 0; qfe_slot < 4; qfe_slot++)
if (!qp->happy_meals[qfe_slot])
break;
if (qfe_slot == 4)
goto err_out;
}
dev = devm_alloc_etherdev(&pdev->dev, sizeof(struct happy_meal));
if (!dev) {
err = -ENOMEM;
goto err_out;
}
SET_NETDEV_DEV(dev, &pdev->dev);
hp = netdev_priv(dev);
hp->happy_dev = pdev;
hp->dma_dev = &pdev->dev;
spin_lock_init(&hp->happy_lock);
if (qp != NULL) {
hp->qfe_parent = qp;
hp->qfe_ent = qfe_slot;
qp->happy_meals[qfe_slot] = dev;
}
err = -EINVAL;
if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
dev_err(&pdev->dev,
"Cannot find proper PCI device base address.\n");
goto err_out_clear_quattro;
}
hpreg_res = devm_request_mem_region(&pdev->dev,
pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0),
DRV_NAME);
if (!hpreg_res) {
err = -EBUSY;
dev_err(&pdev->dev, "Cannot obtain PCI resources, aborting.\n");
goto err_out_clear_quattro;
}
hpreg_base = pcim_iomap(pdev, 0, 0x8000);
if (!hpreg_base) {
err = -ENOMEM;
dev_err(&pdev->dev, "Unable to remap card memory.\n");
goto err_out_clear_quattro;
}
for (i = 0; i < 6; i++) {
if (macaddr[i] != 0)
break;
}
if (i < 6) { /* a mac address was given */
for (i = 0; i < 6; i++)
addr[i] = macaddr[i];
eth_hw_addr_set(dev, addr);
macaddr[5]++;
} else {
#ifdef CONFIG_SPARC
const unsigned char *addr;
int len;
if (qfe_slot != -1 &&
(addr = of_get_property(dp, "local-mac-address", &len))
!= NULL &&
len == 6) {
eth_hw_addr_set(dev, addr);
} else {
eth_hw_addr_set(dev, idprom->id_ethaddr);
}
#else
u8 addr[ETH_ALEN];
get_hme_mac_nonsparc(pdev, addr);
eth_hw_addr_set(dev, addr);
#endif
}
/* Layout registers. */
hp->gregs = (hpreg_base + 0x0000UL);
hp->etxregs = (hpreg_base + 0x2000UL);
hp->erxregs = (hpreg_base + 0x4000UL);
hp->bigmacregs = (hpreg_base + 0x6000UL);
hp->tcvregs = (hpreg_base + 0x7000UL);
#ifdef CONFIG_SPARC
hp->hm_revision = of_getintprop_default(dp, "hm-rev", 0xff);
if (hp->hm_revision == 0xff)
hp->hm_revision = 0xc0 | (pdev->revision & 0x0f);
#else
/* works with this on non-sparc hosts */
hp->hm_revision = 0x20;
#endif
/* Now enable the feature flags we can. */
if (hp->hm_revision == 0x20 || hp->hm_revision == 0x21)
hp->happy_flags = HFLAG_20_21;
else if (hp->hm_revision != 0xa0 && hp->hm_revision != 0xc0)
hp->happy_flags = HFLAG_NOT_A0;
if (qp != NULL)
hp->happy_flags |= HFLAG_QUATTRO;
/* And of course, indicate this is PCI. */
hp->happy_flags |= HFLAG_PCI;
#ifdef CONFIG_SPARC
/* Assume PCI happy meals can handle all burst sizes. */
hp->happy_bursts = DMA_BURSTBITS;
#endif
hp->happy_block = dmam_alloc_coherent(&pdev->dev, PAGE_SIZE,
&hp->hblock_dvma, GFP_KERNEL);
if (!hp->happy_block) {
err = -ENOMEM;
goto err_out_clear_quattro;
}
hp->linkcheck = 0;
hp->timer_state = asleep;
hp->timer_ticks = 0;
timer_setup(&hp->happy_timer, happy_meal_timer, 0);
hp->irq = pdev->irq;
hp->dev = dev;
dev->netdev_ops = &hme_netdev_ops;
dev->watchdog_timeo = 5*HZ;
dev->ethtool_ops = &hme_ethtool_ops;
/* Happy Meal can do it all... */
dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM;
dev->features |= dev->hw_features | NETIF_F_RXCSUM;
#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
/* Hook up PCI register/descriptor accessors. */
hp->read_desc32 = pci_hme_read_desc32;
hp->write_txd = pci_hme_write_txd;
hp->write_rxd = pci_hme_write_rxd;
hp->read32 = pci_hme_read32;
hp->write32 = pci_hme_write32;
#endif
/* Grrr, Happy Meal comes up by default not advertising
* full duplex 100baseT capabilities, fix this.
*/
spin_lock_irq(&hp->happy_lock);
happy_meal_set_initial_advertisement(hp);
spin_unlock_irq(&hp->happy_lock);
err = devm_register_netdev(&pdev->dev, dev);
if (err) {
dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
goto err_out_clear_quattro;
}
pci_set_drvdata(pdev, hp);
if (!qfe_slot) {
struct pci_dev *qpdev = qp->quattro_dev;
prom_name[0] = 0;
if (!strncmp(dev->name, "eth", 3)) {
int i = simple_strtoul(dev->name + 3, NULL, 10);
sprintf(prom_name, "-%d", i + 3);
}
netdev_info(dev,
"%s: Quattro HME (PCI/CheerIO) 10/100baseT Ethernet bridge %04x.%04x\n",
prom_name, qpdev->vendor, qpdev->device);
}
if (qfe_slot != -1)
netdev_info(dev,
"Quattro HME slot %d (PCI/CheerIO) 10/100baseT Ethernet %pM\n",
qfe_slot, dev->dev_addr);
else
netdev_info(dev,
"HAPPY MEAL (PCI/CheerIO) 10/100BaseT Ethernet %pM\n",
dev->dev_addr);
return 0;
err_out_clear_quattro:
if (qp != NULL)
qp->happy_meals[qfe_slot] = NULL;
err_out:
return err;
}
static const struct pci_device_id happymeal_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_HAPPYMEAL) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, happymeal_pci_ids);
static struct pci_driver hme_pci_driver = {
.name = "hme",
.id_table = happymeal_pci_ids,
.probe = happy_meal_pci_probe,
};
static int __init happy_meal_pci_init(void)
{
return pci_register_driver(&hme_pci_driver);
}
static void happy_meal_pci_exit(void)
{
pci_unregister_driver(&hme_pci_driver);
while (qfe_pci_list) {
struct quattro *qfe = qfe_pci_list;
struct quattro *next = qfe->next;
kfree(qfe);
qfe_pci_list = next;
}
}
#endif
#ifdef CONFIG_SBUS
static const struct of_device_id hme_sbus_match[];
static int hme_sbus_probe(struct platform_device *op)
{
const struct of_device_id *match;
struct device_node *dp = op->dev.of_node;
const char *model = of_get_property(dp, "model", NULL);
int is_qfe;
match = of_match_device(hme_sbus_match, &op->dev);
if (!match)
return -EINVAL;
is_qfe = (match->data != NULL);
if (!is_qfe && model && !strcmp(model, "SUNW,sbus-qfe"))
is_qfe = 1;
return happy_meal_sbus_probe_one(op, is_qfe);
}
static int hme_sbus_remove(struct platform_device *op)
{
struct happy_meal *hp = platform_get_drvdata(op);
struct net_device *net_dev = hp->dev;
unregister_netdev(net_dev);
/* XXX qfe parent interrupt... */
of_iounmap(&op->resource[0], hp->gregs, GREG_REG_SIZE);
of_iounmap(&op->resource[1], hp->etxregs, ETX_REG_SIZE);
of_iounmap(&op->resource[2], hp->erxregs, ERX_REG_SIZE);
of_iounmap(&op->resource[3], hp->bigmacregs, BMAC_REG_SIZE);
of_iounmap(&op->resource[4], hp->tcvregs, TCVR_REG_SIZE);
dma_free_coherent(hp->dma_dev,
PAGE_SIZE,
hp->happy_block,
hp->hblock_dvma);
free_netdev(net_dev);
return 0;
}
static const struct of_device_id hme_sbus_match[] = {
{
.name = "SUNW,hme",
},
{
.name = "SUNW,qfe",
.data = (void *) 1,
},
{
.name = "qfe",
.data = (void *) 1,
},
{},
};
MODULE_DEVICE_TABLE(of, hme_sbus_match);
static struct platform_driver hme_sbus_driver = {
.driver = {
.name = "hme",
.of_match_table = hme_sbus_match,
},
.probe = hme_sbus_probe,
.remove = hme_sbus_remove,
};
static int __init happy_meal_sbus_init(void)
{
int err;
err = platform_driver_register(&hme_sbus_driver);
if (!err)
err = quattro_sbus_register_irqs();
return err;
}
static void happy_meal_sbus_exit(void)
{
platform_driver_unregister(&hme_sbus_driver);
quattro_sbus_free_irqs();
while (qfe_sbus_list) {
struct quattro *qfe = qfe_sbus_list;
struct quattro *next = qfe->next;
kfree(qfe);
qfe_sbus_list = next;
}
}
#endif
static int __init happy_meal_probe(void)
{
int err = 0;
#ifdef CONFIG_SBUS
err = happy_meal_sbus_init();
#endif
#ifdef CONFIG_PCI
if (!err) {
err = happy_meal_pci_init();
#ifdef CONFIG_SBUS
if (err)
happy_meal_sbus_exit();
#endif
}
#endif
return err;
}
static void __exit happy_meal_exit(void)
{
#ifdef CONFIG_SBUS
happy_meal_sbus_exit();
#endif
#ifdef CONFIG_PCI
happy_meal_pci_exit();
#endif
}
module_init(happy_meal_probe);
module_exit(happy_meal_exit);