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jme: Safer MAC processor reset sequence

Browse source 
Adding control to clk_rx, and makes the control of clk_{rx|tx|tcp}
with safer sequence.
This sequence is provided by JMicron.

Signed-off-by: Guo-Fu Tseng <cooldavid@cooldavid.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Guo-Fu Tseng 2011-02-13 18:27:39 +00:00 committed by David S. Miller
parent 3903c02357
commit 854a2e7c33
2 changed files with 126 additions and 42 deletions
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152
drivers/net/jme.c
View file

@ -160,6 +160,67 @@ jme_setup_wakeup_frame(struct jme_adapter *jme,
}
}
static inline void
jme_mac_rxclk_off(struct jme_adapter *jme)
{
jme->reg_gpreg1 |= GPREG1_RXCLKOFF;
jwrite32f(jme, JME_GPREG1, jme->reg_gpreg1);
}
static inline void
jme_mac_rxclk_on(struct jme_adapter *jme)
{
jme->reg_gpreg1 &= ~GPREG1_RXCLKOFF;
jwrite32f(jme, JME_GPREG1, jme->reg_gpreg1);
}
static inline void
jme_mac_txclk_off(struct jme_adapter *jme)
{
jme->reg_ghc &= ~(GHC_TO_CLK_SRC | GHC_TXMAC_CLK_SRC);
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_mac_txclk_on(struct jme_adapter *jme)
{
u32 speed = jme->reg_ghc & GHC_SPEED;
if (speed == GHC_SPEED_1000M)
jme->reg_ghc |= GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
else
jme->reg_ghc |= GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_reset_ghc_speed(struct jme_adapter *jme)
{
jme->reg_ghc &= ~(GHC_SPEED | GHC_DPX);
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_reset_250A2_workaround(struct jme_adapter *jme)
{
jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
GPREG1_RSSPATCH);
jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
}
static inline void
jme_assert_ghc_reset(struct jme_adapter *jme)
{
jme->reg_ghc |= GHC_SWRST;
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_clear_ghc_reset(struct jme_adapter *jme)
{
jme->reg_ghc &= ~GHC_SWRST;
jwrite32f(jme, JME_GHC, jme->reg_ghc);
}
static inline void
jme_reset_mac_processor(struct jme_adapter *jme)
{
@ -168,9 +229,24 @@ jme_reset_mac_processor(struct jme_adapter *jme)
u32 gpreg0;
int i;
jwrite32(jme, JME_GHC, jme->reg_ghc | GHC_SWRST);
udelay(2);
jwrite32(jme, JME_GHC, jme->reg_ghc);
jme_reset_ghc_speed(jme);
jme_reset_250A2_workaround(jme);
jme_mac_rxclk_on(jme);
jme_mac_txclk_on(jme);
udelay(1);
jme_assert_ghc_reset(jme);
udelay(1);
jme_mac_rxclk_off(jme);
jme_mac_txclk_off(jme);
udelay(1);
jme_clear_ghc_reset(jme);
udelay(1);
jme_mac_rxclk_on(jme);
jme_mac_txclk_on(jme);
udelay(1);
jme_mac_rxclk_off(jme);
jme_mac_txclk_off(jme);
jwrite32(jme, JME_RXDBA_LO, 0x00000000);
jwrite32(jme, JME_RXDBA_HI, 0x00000000);
@ -190,14 +266,6 @@ jme_reset_mac_processor(struct jme_adapter *jme)
else
gpreg0 = GPREG0_DEFAULT;
jwrite32(jme, JME_GPREG0, gpreg0);
jwrite32(jme, JME_GPREG1, GPREG1_DEFAULT);
}
static inline void
jme_reset_ghc_speed(struct jme_adapter *jme)
{
jme->reg_ghc &= ~(GHC_SPEED_1000M | GHC_DPX);
jwrite32(jme, JME_GHC, jme->reg_ghc);
}
static inline void
@ -351,7 +419,7 @@ static int
jme_check_link(struct net_device *netdev, int testonly)
{
struct jme_adapter *jme = netdev_priv(netdev);
u32 phylink, ghc, cnt = JME_SPDRSV_TIMEOUT, bmcr, gpreg1;
u32 phylink, cnt = JME_SPDRSV_TIMEOUT, bmcr;
char linkmsg[64];
int rc = 0;
@ -414,23 +482,21 @@ jme_check_link(struct net_device *netdev, int testonly)
jme->phylink = phylink;
ghc = jme->reg_ghc & ~(GHC_SPEED | GHC_DPX |
GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE |
GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY);
/*
* The speed/duplex setting of jme->reg_ghc already cleared
* by jme_reset_mac_processor()
*/
switch (phylink & PHY_LINK_SPEED_MASK) {
case PHY_LINK_SPEED_10M:
ghc |= GHC_SPEED_10M |
GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
jme->reg_ghc |= GHC_SPEED_10M;
strcat(linkmsg, "10 Mbps, ");
break;
case PHY_LINK_SPEED_100M:
ghc |= GHC_SPEED_100M |
GHC_TO_CLK_PCIE | GHC_TXMAC_CLK_PCIE;
jme->reg_ghc |= GHC_SPEED_100M;
strcat(linkmsg, "100 Mbps, ");
break;
case PHY_LINK_SPEED_1000M:
ghc |= GHC_SPEED_1000M |
GHC_TO_CLK_GPHY | GHC_TXMAC_CLK_GPHY;
jme->reg_ghc |= GHC_SPEED_1000M;
strcat(linkmsg, "1000 Mbps, ");
break;
default:
@ -440,7 +506,7 @@ jme_check_link(struct net_device *netdev, int testonly)
if (phylink & PHY_LINK_DUPLEX) {
jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT);
jwrite32(jme, JME_TXTRHD, TXTRHD_FULLDUPLEX);
ghc |= GHC_DPX;
jme->reg_ghc |= GHC_DPX;
} else {
jwrite32(jme, JME_TXMCS, TXMCS_DEFAULT |
TXMCS_BACKOFF |
@ -449,18 +515,21 @@ jme_check_link(struct net_device *netdev, int testonly)
jwrite32(jme, JME_TXTRHD, TXTRHD_HALFDUPLEX);
}
gpreg1 = GPREG1_DEFAULT;
jwrite32(jme, JME_GHC, jme->reg_ghc);
if (is_buggy250(jme->pdev->device, jme->chiprev)) {
jme->reg_gpreg1 &= ~(GPREG1_HALFMODEPATCH |
GPREG1_RSSPATCH);
if (!(phylink & PHY_LINK_DUPLEX))
gpreg1 |= GPREG1_HALFMODEPATCH;
jme->reg_gpreg1 |= GPREG1_HALFMODEPATCH;
switch (phylink & PHY_LINK_SPEED_MASK) {
case PHY_LINK_SPEED_10M:
jme_set_phyfifo_8level(jme);
gpreg1 |= GPREG1_RSSPATCH;
jme->reg_gpreg1 |= GPREG1_RSSPATCH;
break;
case PHY_LINK_SPEED_100M:
jme_set_phyfifo_5level(jme);
gpreg1 |= GPREG1_RSSPATCH;
jme->reg_gpreg1 |= GPREG1_RSSPATCH;
break;
case PHY_LINK_SPEED_1000M:
jme_set_phyfifo_8level(jme);
@ -469,10 +538,7 @@ jme_check_link(struct net_device *netdev, int testonly)
break;
}
}
jwrite32(jme, JME_GPREG1, gpreg1);
jwrite32(jme, JME_GHC, ghc);
jme->reg_ghc = ghc;
jwrite32(jme, JME_GPREG1, jme->reg_gpreg1);
strcat(linkmsg, (phylink & PHY_LINK_DUPLEX) ?
"Full-Duplex, " :
@ -611,10 +677,14 @@ jme_enable_tx_engine(struct jme_adapter *jme)
* Enable TX Engine
*/
wmb();
jwrite32(jme, JME_TXCS, jme->reg_txcs |
jwrite32f(jme, JME_TXCS, jme->reg_txcs |
TXCS_SELECT_QUEUE0 |
TXCS_ENABLE);
/*
* Start clock for TX MAC Processor
*/
jme_mac_txclk_on(jme);
}
static inline void
@ -649,6 +719,11 @@ jme_disable_tx_engine(struct jme_adapter *jme)
if (!i)
pr_err("Disable TX engine timeout\n");
/*
* Stop clock for TX MAC Processor
*/
jme_mac_txclk_off(jme);
}
static void
@ -829,10 +904,15 @@ jme_enable_rx_engine(struct jme_adapter *jme)
* Enable RX Engine
*/
wmb();
jwrite32(jme, JME_RXCS, jme->reg_rxcs |
jwrite32f(jme, JME_RXCS, jme->reg_rxcs |
RXCS_QUEUESEL_Q0 |
RXCS_ENABLE |
RXCS_QST);
/*
* Start clock for RX MAC Processor
*/
jme_mac_rxclk_on(jme);
}
static inline void
@ -869,6 +949,10 @@ jme_disable_rx_engine(struct jme_adapter *jme)
if (!i)
pr_err("Disable RX engine timeout\n");
/*
* Stop clock for RX MAC Processor
*/
jme_mac_rxclk_off(jme);
}
static int
@ -1205,7 +1289,6 @@ jme_link_change_tasklet(unsigned long arg)
tasklet_disable(&jme->rxempty_task);
if (netif_carrier_ok(netdev)) {
jme_reset_ghc_speed(jme);
jme_disable_rx_engine(jme);
jme_disable_tx_engine(jme);
jme_reset_mac_processor(jme);
@ -1735,7 +1818,6 @@ jme_close(struct net_device *netdev)
tasklet_disable(&jme->rxclean_task);
tasklet_disable(&jme->rxempty_task);
jme_reset_ghc_speed(jme);
jme_disable_rx_engine(jme);
jme_disable_tx_engine(jme);
jme_reset_mac_processor(jme);
@ -2921,6 +3003,7 @@ jme_init_one(struct pci_dev *pdev,
jme->reg_rxmcs = RXMCS_DEFAULT;
jme->reg_txpfc = 0;
jme->reg_pmcs = PMCS_MFEN;
jme->reg_gpreg1 = GPREG1_DEFAULT;
set_bit(JME_FLAG_TXCSUM, &jme->flags);
set_bit(JME_FLAG_TSO, &jme->flags);
@ -3076,7 +3159,6 @@ jme_suspend(struct pci_dev *pdev, pm_message_t state)
jme_polling_mode(jme);
jme_stop_pcc_timer(jme);
jme_reset_ghc_speed(jme);
jme_disable_rx_engine(jme);
jme_disable_tx_engine(jme);
jme_reset_mac_processor(jme);

16
drivers/net/jme.h
View file

@ -434,6 +434,7 @@ struct jme_adapter {
u32 reg_rxmcs;
u32 reg_ghc;
u32 reg_pmcs;
u32 reg_gpreg1;
u32 phylink;
u32 tx_ring_size;
u32 tx_ring_mask;
@ -821,6 +822,8 @@ static inline u32 smi_phy_addr(int x)
*/
enum jme_ghc_bit_mask {
GHC_SWRST = 0x40000000,
GHC_TO_CLK_SRC = 0x00C00000,
GHC_TXMAC_CLK_SRC = 0x00300000,
GHC_DPX = 0x00000040,
GHC_SPEED = 0x00000030,
GHC_LINK_POLL = 0x00000001,
@ -999,18 +1002,17 @@ enum jme_gpreg0_vals {
/*
* General Purpose REG-1
* Note: All theses bits defined here are for
* Chip mode revision 0x11 only
*/
enum jme_gpreg1_masks {
enum jme_gpreg1_bit_masks {
GPREG1_RXCLKOFF = 0x04000000,
GPREG1_PCREQN = 0x00020000,
GPREG1_HALFMODEPATCH = 0x00000040, /* For Chip revision 0x11 only */
GPREG1_RSSPATCH = 0x00000020, /* For Chip revision 0x11 only */
GPREG1_INTRDELAYUNIT = 0x00000018,
GPREG1_INTRDELAYENABLE = 0x00000007,
};
enum jme_gpreg1_vals {
GPREG1_HALFMODEPATCH = 0x00000040,
GPREG1_RSSPATCH = 0x00000020,
GPREG1_INTDLYUNIT_16NS = 0x00000000,
GPREG1_INTDLYUNIT_256NS = 0x00000008,
GPREG1_INTDLYUNIT_1US = 0x00000010,
@ -1024,7 +1026,7 @@ enum jme_gpreg1_vals {
GPREG1_INTDLYEN_6U = 0x00000006,
GPREG1_INTDLYEN_7U = 0x00000007,
GPREG1_DEFAULT = 0x00000000,
GPREG1_DEFAULT = GPREG1_PCREQN,
};
/*