diff options
Diffstat (limited to 'drivers/ata/ahci_qoriq.c')
| -rw-r--r-- | drivers/ata/ahci_qoriq.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c index 6cd61842ad48..76700045dea6 100644 --- a/drivers/ata/ahci_qoriq.c +++ b/drivers/ata/ahci_qoriq.c @@ -48,6 +48,27 @@ #define ECC_DIS_ARMV8_CH2 0x80000000 #define ECC_DIS_LS1088A 0x40000000 +/* errata for lx2160 */ +#define RCWSR29_BASE 0x1E00170 +#define SERDES2_BASE 0x1EB0000 +#define DEVICE_CONFIG_REG_BASE 0x1E00000 +#define SERDES2_LNAX_RX_CR(x) (0x840 + (0x100 * (x))) +#define SERDES2_LNAX_RX_CBR(x) (0x8C0 + (0x100 * (x))) +#define SYS_VER_REG 0xA4 +#define LN_RX_RST 0x80000010 +#define LN_RX_RST_DONE 0x3 +#define LN_RX_MASK 0xf +#define LX2160A_VER1 0x1 + +#define SERDES2_LNAA 0 +#define SERDES2_LNAB 1 +#define SERDES2_LNAC 2 +#define SERDES2_LNAD 3 +#define SERDES2_LNAE 4 +#define SERDES2_LNAF 5 +#define SERDES2_LNAG 6 +#define SERDES2_LNAH 7 + enum ahci_qoriq_type { AHCI_LS1021A, AHCI_LS1028A, @@ -87,6 +108,126 @@ static const struct acpi_device_id ahci_qoriq_acpi_match[] = { }; MODULE_DEVICE_TABLE(acpi, ahci_qoriq_acpi_match); +static void fsl_sata_errata_379364(bool select) +{ + int val = 0; + void __iomem *rcw_base = NULL; + void __iomem *serdes_base = NULL; + void __iomem *dev_con_base = NULL; + + if (select) { + dev_con_base = ioremap(DEVICE_CONFIG_REG_BASE, PAGE_SIZE); + if (!dev_con_base) + return; + + val = (readl(dev_con_base + SYS_VER_REG) & GENMASK(7, 4)) >> 4; + if (val != LX2160A_VER1) + goto dev_unmap; + + /* + * Add few msec delay. + * Check for corresponding serdes lane RST_DONE . + * apply lane reset. + */ + + serdes_base = ioremap(SERDES2_BASE, PAGE_SIZE); + if (!serdes_base) + goto dev_unmap; + + rcw_base = ioremap(RCWSR29_BASE, PAGE_SIZE); + if (!rcw_base) + goto serdes_unmap; + + msleep(20); + + val = (readl(rcw_base) & GENMASK(25, 21)) >> 21; + + switch (val) { + case 1: + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAC)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAC)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAD)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAD)); + break; + + case 4: + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAG)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAG)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAH)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAH)); + break; + + case 5: + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAE)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAE)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAF)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAF)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAG)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAG)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAH)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAH)); + break; + + case 8: + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAC)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAC)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAD)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAD)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAE)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAE)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAF)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAF)); + break; + + case 12: + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAG)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAG)); + if ((readl(serdes_base + SERDES2_LNAX_RX_CBR(SERDES2_LNAH)) & + LN_RX_MASK) != LN_RX_RST_DONE) + writel(LN_RX_RST, serdes_base + + SERDES2_LNAX_RX_CR(SERDES2_LNAH)); + break; + + default: + break; + } + } else { + return; + } + + iounmap(rcw_base); +serdes_unmap: + iounmap(serdes_base); +dev_unmap: + iounmap(dev_con_base); +} + static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { @@ -102,6 +243,7 @@ static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class, bool online; int rc; bool ls1021a_workaround = (qoriq_priv->type == AHCI_LS1021A); + bool lx2160a_workaround = (qoriq_priv->type == AHCI_LX2160A); hpriv->stop_engine(ap); @@ -126,6 +268,8 @@ static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class, tf.status = ATA_BUSY; ata_tf_to_fis(&tf, 0, 0, d2h_fis); + fsl_sata_errata_379364(lx2160a_workaround); + rc = sata_link_hardreset(link, timing, deadline, &online, ahci_check_ready); |