diff options
| author | Florian Fainelli <f.fainelli@gmail.com> | 2015-02-05 22:40:42 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-08 09:38:40 +0300 |
| commit | 9af197a8f6ecab8c22e4ad0167616151fce5a4cb (patch) | |
| tree | 95f757336beda2400a803524c21a5ea2e2207119 /drivers/net/dsa | |
| parent | b083668c93e5bf889e6ec4761540be1accc3f1b1 (diff) | |
| download | linux-9af197a8f6ecab8c22e4ad0167616151fce5a4cb.tar.xz | |
net: dsa: bcm_sf2: implement GPHY power down
Implement the power on/off recommended procedure for the Single GPHY we
have on our Starfighter 2 switch. In order to make sure we get proper
LED link/activity signaling during suspend, switch the link indication
from the Switch/MAC to the PHY.
Finally, since the GPHY needs to be reset to be put in low power mode,
we will loose any context applied to it: workarounds, EEE etc.. so we
need to call phy_init_hw() to get our fixups re-applied successfully.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/bcm_sf2.c | 50 | ||||
| -rw-r--r-- | drivers/net/dsa/bcm_sf2_regs.h | 4 |
2 files changed, 45 insertions, 9 deletions
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index 45c0e2b97f5f..4daffb284931 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -238,17 +238,28 @@ static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable) struct bcm_sf2_priv *priv = ds_to_priv(ds); u32 reg; - if (!enable) - return; - - reg = reg_readl(priv, REG_SPHY_CNTRL); - reg |= PHY_RESET; - reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS); - reg_writel(priv, reg, REG_SPHY_CNTRL); - udelay(21); reg = reg_readl(priv, REG_SPHY_CNTRL); - reg &= ~PHY_RESET; + if (enable) { + reg |= PHY_RESET; + reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | CK25_DIS); + reg_writel(priv, reg, REG_SPHY_CNTRL); + udelay(21); + reg = reg_readl(priv, REG_SPHY_CNTRL); + reg &= ~PHY_RESET; + } else { + reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET; + reg_writel(priv, reg, REG_SPHY_CNTRL); + mdelay(1); + reg |= CK25_DIS; + } reg_writel(priv, reg, REG_SPHY_CNTRL); + + /* Use PHY-driven LED signaling */ + if (!enable) { + reg = reg_readl(priv, REG_LED_CNTRL(0)); + reg |= SPDLNK_SRC_SEL; + reg_writel(priv, reg, REG_LED_CNTRL(0)); + } } static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, @@ -266,6 +277,24 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, /* Clear the Rx and Tx disable bits and set to no spanning tree */ core_writel(priv, 0, CORE_G_PCTL_PORT(port)); + /* Re-enable the GPHY and re-apply workarounds */ + if (port == 0 && priv->hw_params.num_gphy == 1) { + bcm_sf2_gphy_enable_set(ds, true); + if (phy) { + /* if phy_stop() has been called before, phy + * will be in halted state, and phy_start() + * will call resume. + * + * the resume path does not configure back + * autoneg settings, and since we hard reset + * the phy manually here, we need to reset the + * state machine also. + */ + phy->state = PHY_READY; + phy_init_hw(phy); + } + } + /* Enable port 7 interrupts to get notified */ if (port == 7) intrl2_1_mask_clear(priv, P_IRQ_MASK(P7_IRQ_OFF)); @@ -299,6 +328,9 @@ static void bcm_sf2_port_disable(struct dsa_switch *ds, int port, intrl2_1_writel(priv, P_IRQ_MASK(P7_IRQ_OFF), INTRL2_CPU_CLEAR); } + if (port == 0 && priv->hw_params.num_gphy == 1) + bcm_sf2_gphy_enable_set(ds, false); + if (dsa_is_cpu_port(ds, port)) off = CORE_IMP_CTL; else diff --git a/drivers/net/dsa/bcm_sf2_regs.h b/drivers/net/dsa/bcm_sf2_regs.h index 1bb49cb699ab..cabdfa5e217a 100644 --- a/drivers/net/dsa/bcm_sf2_regs.h +++ b/drivers/net/dsa/bcm_sf2_regs.h @@ -61,6 +61,10 @@ #define LPI_COUNT_SHIFT 9 #define LPI_COUNT_MASK 0x3F +#define REG_LED_CNTRL_BASE 0x90 +#define REG_LED_CNTRL(x) (REG_LED_CNTRL_BASE + (x) * 4) +#define SPDLNK_SRC_SEL (1 << 24) + /* Register set relative to 'INTRL2_0' and 'INTRL2_1' */ #define INTRL2_CPU_STATUS 0x00 #define INTRL2_CPU_SET 0x04 |