From mboxrd@z Thu Jan 1 00:00:00 1970 From: simon.guinot@sequanux.org (Simon Guinot) Date: Tue, 14 Jan 2014 15:50:06 +0100 Subject: [PATCH v2 2/3] ata: sata_mv: fix disk hotplug for Armada 370/XP SoCs In-Reply-To: <1389711007-7239-1-git-send-email-simon.guinot@sequanux.org> References: <1389711007-7239-1-git-send-email-simon.guinot@sequanux.org> Message-ID: <1389711007-7239-3-git-send-email-simon.guinot@sequanux.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Lior Amsalem On Armada 370/XP SoCs, once a disk is removed from a SATA port, then the re-plug events are not detected by the sata_mv driver. This patch fixes the issue by updating the PHY speed in the LP_PHY_CTL register (0x58) according to the SControl speed. Note that this fix is only applied if the compatible string "marvell,armada-370-xp-sata" is found in the SATA DT node. Signed-off-by: Lior Amsalem Signed-off-by: Nadav Haklai Signed-off-by: Simon Guinot Cc: Thomas Petazzoni Cc: Jason Cooper Cc: Andrew Lunn Cc: Gregory Clement Cc: Sebastian Hesselbarth Cc: stable at vger.kernel.org --- Changes since v1: - Only fix the LP_PHY_CTL register (0x58) if the compatible string "marvell,armada-370-xp-sata" is found in the SATA DT node. - Update the commit message. drivers/ata/sata_mv.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index df35c521a141..780bcc808b51 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -304,6 +304,7 @@ enum { MV5_LTMODE = 0x30, MV5_PHY_CTL = 0x0C, SATA_IFCFG = 0x050, + LP_PHY_CTL = 0x058, MV_M2_PREAMP_MASK = 0x7e0, @@ -431,6 +432,7 @@ enum { MV_HP_CUT_THROUGH = (1 << 10), /* can use EDMA cut-through */ MV_HP_FLAG_SOC = (1 << 11), /* SystemOnChip, no PCI */ MV_HP_QUIRK_LED_BLINK_EN = (1 << 12), /* is led blinking enabled? */ + MV_HP_FIX_LP_PHY_CTL = (1 << 13), /* fix speed in LP_PHY_CTL ? */ /* Port private flags (pp_flags) */ MV_PP_FLAG_EDMA_EN = (1 << 0), /* is EDMA engine enabled? */ @@ -1358,6 +1360,7 @@ static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) if (ofs != 0xffffffffU) { void __iomem *addr = mv_ap_base(link->ap) + ofs; + struct mv_host_priv *hpriv = link->ap->host->private_data; if (sc_reg_in == SCR_CONTROL) { /* * Workaround for 88SX60x1 FEr SATA#26: @@ -1374,6 +1377,18 @@ static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val) */ if ((val & 0xf) == 1 || (readl(addr) & 0xf) == 1) val |= 0xf000; + + if (hpriv->hp_flags & MV_HP_FIX_LP_PHY_CTL) { + void __iomem *lp_phy_addr = + mv_ap_base(link->ap) + LP_PHY_CTL; + /* + * Set PHY speed according to SControl speed. + */ + if ((val & 0xf0) == 0x10) + writelfl(0x7, lp_phy_addr); + else + writelfl(0x227, lp_phy_addr); + } } writelfl(val, addr); return 0; @@ -4110,6 +4125,15 @@ static int mv_platform_probe(struct platform_device *pdev) if (rc) goto err; + /* + * To allow disk hotplug on Armada 370/XP SoCs, the PHY speed must be + * updated in the LP_PHY_CTL register. + */ + if (pdev->dev.of_node && + of_device_is_compatible(pdev->dev.of_node, + "marvell,armada-370-xp-sata")) + hpriv->hp_flags |= MV_HP_FIX_LP_PHY_CTL; + /* initialize adapter */ rc = mv_init_host(host); if (rc) -- 1.8.5.2