[libata sata_mv] implement a bunch of errata workarounds
Based largely on the GPL'd Marvell vendor driver.
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index 26e9d51..b1696e3 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -50,6 +50,8 @@
MV_PCI_REG_BASE = 0,
MV_IRQ_COAL_REG_BASE = 0x18000, /* 6xxx part only */
MV_SATAHC0_REG_BASE = 0x20000,
+ MV_GPIO_PORT_CTL = 0x104f0,
+ MV_RESET_CFG = 0x180d8,
MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
@@ -148,6 +150,11 @@
/* SATA registers */
SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
SATA_ACTIVE_OFS = 0x350,
+ PHY_MODE4 = 0x314,
+ PHY_MODE2 = 0x330,
+ SATA_INTERFACE_CTL = 0x050,
+
+ MV_M2_PREAMP_MASK = 0x7e0,
/* Port registers */
EDMA_CFG_OFS = 0,
@@ -201,14 +208,26 @@
EDMA_DS = (1 << 1),
ATA_RST = (1 << 2),
+ EDMA_ARB_CFG = 0x38,
+ EDMA_NO_SNOOP = (1 << 6),
+
/* Host private flags (hp_flags) */
MV_HP_FLAG_MSI = (1 << 0),
+ MV_HP_ERRATA_60X1A1 = (1 << 1),
+ MV_HP_ERRATA_60X1B0 = (1 << 2),
+ MV_HP_ERRATA_50XXB0 = (1 << 3),
+ MV_HP_ERRATA_50XXB1 = (1 << 4),
+ MV_HP_ERRATA_50XXB2 = (1 << 5),
+ MV_HP_50XX = (1 << 6),
/* Port private flags (pp_flags) */
MV_PP_FLAG_EDMA_EN = (1 << 0),
MV_PP_FLAG_EDMA_DS_ACT = (1 << 1),
};
+#define IS_50XX(hpriv) ((hpriv)->hp_flags & MV_HP_50XX)
+#define IS_60XX(hpriv) (((hpriv)->hp_flags & MV_HP_50XX) == 0)
+
enum {
/* Our DMA boundary is determined by an ePRD being unable to handle
* anything larger than 64KB
@@ -256,8 +275,14 @@
u32 pp_flags;
};
+struct mv_port_signal {
+ u32 amps;
+ u32 pre;
+};
+
struct mv_host_priv {
u32 hp_flags;
+ struct mv_port_signal signal[8];
};
static void mv_irq_clear(struct ata_port *ap);
@@ -354,10 +379,12 @@
};
static const struct pci_device_id mv_pci_tbl[] = {
+#if 0 /* unusably broken right now */
{PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5040), 0, 0, chip_504x},
{PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5041), 0, 0, chip_504x},
{PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5080), 0, 0, chip_508x},
{PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5081), 0, 0, chip_508x},
+#endif
{PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6040), 0, 0, chip_604x},
{PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6041), 0, 0, chip_604x},
@@ -402,9 +429,9 @@
return mv_port_base(ap->host_set->mmio_base, ap->port_no);
}
-static inline int mv_get_hc_count(unsigned long hp_flags)
+static inline int mv_get_hc_count(unsigned long host_flags)
{
- return ((hp_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
+ return ((host_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
}
static void mv_irq_clear(struct ata_port *ap)
@@ -694,6 +721,7 @@
static int mv_port_start(struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
+ struct mv_host_priv *hpriv = ap->host_set->private_data;
struct mv_port_priv *pp;
void __iomem *port_mmio = mv_ap_base(ap);
void *mem;
@@ -751,6 +779,15 @@
writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
+ if (hpriv->hp_flags & MV_HP_ERRATA_60X1A1) {
+ u32 new_tmp, tmp;
+
+ new_tmp = tmp = readl(port_mmio + EDMA_ARB_CFG);
+ new_tmp &= ~EDMA_NO_SNOOP;
+ if (new_tmp != tmp)
+ writel(new_tmp, port_mmio + EDMA_ARB_CFG);
+ }
+
pp->req_producer = pp->rsp_consumer = 0;
/* Don't turn on EDMA here...do it before DMA commands only. Else
@@ -1206,6 +1243,52 @@
return IRQ_RETVAL(handled);
}
+static void mv_phy_errata5(struct ata_port *ap)
+{
+ /* FIXME */
+}
+
+static void mv_phy_errata6(struct ata_port *ap)
+{
+ struct mv_host_priv *hpriv = ap->host_set->private_data;
+ u32 hp_flags = hpriv->hp_flags;
+ void __iomem *port_mmio = mv_ap_base(ap);
+ int fix_phy_mode4 =
+ hp_flags & (MV_HP_ERRATA_60X1A1 | MV_HP_ERRATA_60X1B0);
+ u32 m2;
+
+ if (fix_phy_mode4) {
+ u32 tmp, m4;
+
+ m4 = readl(port_mmio + PHY_MODE4);
+ tmp = readl(port_mmio + 0x310);
+
+ m4 = (m4 & ~(1 << 1)) | (1 << 0);
+
+ writel(m4, port_mmio + PHY_MODE4);
+ writel(tmp, port_mmio + 0x310);
+ }
+
+ /* Revert values of pre-emphasis and signal amps to the saved ones */
+ m2 = readl(port_mmio + PHY_MODE2);
+
+ m2 &= ~MV_M2_PREAMP_MASK;
+ m2 |= hpriv->signal[ap->port_no].amps;
+ m2 |= hpriv->signal[ap->port_no].pre;
+
+ writel(m2, port_mmio + PHY_MODE2);
+}
+
+static void mv_phy_errata(struct ata_port *ap)
+{
+ struct mv_host_priv *hpriv = ap->host_set->private_data;
+
+ if (IS_50XX(hpriv))
+ mv_phy_errata5(ap);
+ else
+ mv_phy_errata6(ap);
+}
+
/**
* mv_phy_reset - Perform eDMA reset followed by COMRESET
* @ap: ATA channel to manipulate
@@ -1220,6 +1303,7 @@
static void mv_phy_reset(struct ata_port *ap)
{
struct mv_port_priv *pp = ap->private_data;
+ struct mv_host_priv *hpriv = ap->host_set->private_data;
void __iomem *port_mmio = mv_ap_base(ap);
struct ata_taskfile tf;
struct ata_device *dev = &ap->device[0];
@@ -1230,6 +1314,13 @@
mv_stop_dma(ap);
writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
+
+ if (IS_60XX(hpriv)) {
+ u32 ifctl = readl(port_mmio + SATA_INTERFACE_CTL);
+ ifctl |= (1 << 12) | (1 << 7);
+ writelfl(ifctl, port_mmio + SATA_INTERFACE_CTL);
+ }
+
udelay(25); /* allow reset propagation */
/* Spec never mentions clearing the bit. Marvell's driver does
@@ -1237,6 +1328,8 @@
*/
writelfl(0, port_mmio + EDMA_CMD_OFS);
+ mv_phy_errata(ap);
+
DPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
"SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
@@ -1283,7 +1376,7 @@
pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
- printk("EXIT\n");
+ VPRINTK("EXIT\n");
}
/**
@@ -1380,8 +1473,152 @@
readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
}
+static void mv_enable_leds5(struct mv_host_priv *hpriv, void __iomem *mmio)
+{
+ /* FIXME */
+}
+
+static void mv_enable_leds6(struct mv_host_priv *hpriv, void __iomem *mmio)
+{
+ if (hpriv->hp_flags & MV_HP_ERRATA_60X1A1)
+ writel(0x00020060, mmio + MV_GPIO_PORT_CTL);
+
+ else if (hpriv->hp_flags & MV_HP_ERRATA_60X1B0)
+ writel(0x00000060, mmio + MV_GPIO_PORT_CTL);
+}
+
+static void mv_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
+{
+ if (IS_50XX(hpriv))
+ mv_enable_leds5(hpriv, mmio);
+ else
+ mv_enable_leds6(hpriv, mmio);
+}
+
+static void mv_cfg_signal5(struct mv_host_priv *hpriv, int idx,
+ void __iomem *mmio)
+{
+ /* FIXME */
+}
+
+static void mv_cfg_signal6(struct mv_host_priv *hpriv, int idx,
+ void __iomem *mmio)
+{
+ void __iomem *port_mmio;
+ u32 tmp;
+
+ if (hpriv->hp_flags & MV_HP_ERRATA_60X1A1) {
+ hpriv->signal[idx].amps = 0x5 << 8;
+ hpriv->signal[idx].pre = 0x3 << 5;
+ return;
+ }
+
+ assert (hpriv->hp_flags & MV_HP_ERRATA_60X1B0);
+
+ tmp = readl(mmio + MV_RESET_CFG);
+ if ((tmp & (1 << 0)) == 0) {
+ hpriv->signal[idx].amps = 0x4 << 8;
+ hpriv->signal[idx].pre = 0x1 << 5;
+ return;
+ }
+
+ port_mmio = mv_port_base(mmio, idx);
+ tmp = readl(port_mmio + PHY_MODE2);
+
+ hpriv->signal[idx].amps = tmp & 0x700; /* bits 10:8 */
+ hpriv->signal[idx].pre = tmp & 0xe0; /* bits 7:5 */
+}
+
+static int mv_cfg_errata(struct pci_dev *pdev, struct mv_host_priv *hpriv,
+ unsigned int board_idx)
+{
+ u8 rev_id;
+ u32 hp_flags = hpriv->hp_flags;
+
+ pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
+
+ switch(board_idx) {
+ case chip_504x:
+ case chip_508x:
+ hp_flags |= MV_HP_50XX;
+
+ if (pdev->device == 0x5080) {
+ switch (rev_id) {
+ case 0x0:
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "Applying B0 workarounds to unknown rev 0\n");
+ /* fall through */
+ case 0x1:
+ hp_flags |= MV_HP_ERRATA_50XXB0;
+ break;
+ case 0x2:
+ hp_flags |= MV_HP_ERRATA_50XXB1;
+ break;
+ case 0x3:
+ hp_flags |= MV_HP_ERRATA_50XXB2;
+ break;
+ default:
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "Applying B2 workarounds to future rev\n");
+ hp_flags |= MV_HP_ERRATA_50XXB2;
+ break;
+ }
+ } else {
+ switch (rev_id) {
+ case 0x0:
+ hp_flags |= MV_HP_ERRATA_50XXB0;
+ break;
+ case 0x1:
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "Applying B1 workarounds to unknown rev 1\n");
+ /* fall through */
+ case 0x2:
+ hp_flags |= MV_HP_ERRATA_50XXB1;
+ break;
+ default:
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "Applying B2 workarounds to future rev\n");
+ /* fall through */
+ case 0x3:
+ hp_flags |= MV_HP_ERRATA_50XXB2;
+ break;
+ }
+ }
+ break;
+
+ case chip_604x:
+ case chip_608x:
+ switch (rev_id) {
+ case 0x0:
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "Applying A1 workarounds to unknown rev 0\n");
+ /* fall through */
+ case 0x1:
+ hp_flags |= MV_HP_ERRATA_60X1A1;
+ break;
+ default:
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "Applying B0 workarounds to future rev\n");
+ /* fall through */
+ case 0x2:
+ hp_flags |= MV_HP_ERRATA_60X1B0;
+ break;
+ }
+ break;
+
+ default:
+ printk(KERN_ERR DRV_NAME ": BUG: invalid board index %u\n", board_idx);
+ return 1;
+ }
+
+ hpriv->hp_flags = hp_flags;
+
+ return 0;
+}
+
/**
* mv_host_init - Perform some early initialization of the host.
+ * @pdev: host PCI device
* @probe_ent: early data struct representing the host
*
* If possible, do an early global reset of the host. Then do
@@ -1390,11 +1627,28 @@
* LOCKING:
* Inherited from caller.
*/
-static int mv_host_init(struct ata_probe_ent *probe_ent)
+static int mv_host_init(struct pci_dev *pdev, struct ata_probe_ent *probe_ent,
+ unsigned int board_idx)
{
int rc = 0, n_hc, port, hc;
void __iomem *mmio = probe_ent->mmio_base;
void __iomem *port_mmio;
+ struct mv_host_priv *hpriv = probe_ent->private_data;
+
+ rc = mv_cfg_errata(pdev, hpriv, board_idx);
+ if (rc)
+ goto done;
+
+ n_hc = mv_get_hc_count(probe_ent->host_flags);
+ probe_ent->n_ports = MV_PORTS_PER_HC * n_hc;
+
+ if (IS_50XX(hpriv)) {
+ for (port = 0; port < probe_ent->n_ports; port++)
+ mv_cfg_signal5(hpriv, port, mmio);
+ } else {
+ for (port = 0; port < probe_ent->n_ports; port++)
+ mv_cfg_signal6(hpriv, port, mmio);
+ }
if ((MV_FLAG_GLBL_SFT_RST & probe_ent->host_flags) &&
mv_global_soft_reset(probe_ent->mmio_base)) {
@@ -1402,8 +1656,7 @@
goto done;
}
- n_hc = mv_get_hc_count(probe_ent->host_flags);
- probe_ent->n_ports = MV_PORTS_PER_HC * n_hc;
+ mv_enable_leds(hpriv, mmio);
for (port = 0; port < probe_ent->n_ports; port++) {
port_mmio = mv_port_base(mmio, port);
@@ -1435,6 +1688,7 @@
readl(mmio + HC_MAIN_IRQ_MASK_OFS),
readl(mmio + PCI_IRQ_CAUSE_OFS),
readl(mmio + PCI_IRQ_MASK_OFS));
+
done:
return rc;
}
@@ -1540,7 +1794,7 @@
probe_ent->private_data = hpriv;
/* initialize adapter */
- rc = mv_host_init(probe_ent);
+ rc = mv_host_init(pdev, probe_ent, board_idx);
if (rc) {
goto err_out_hpriv;
}