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Subject[PATCH 2/3] mv-ahci: Add Marvell PATA support
commit b789e972e23509ab27312b9cf7273b611feb25cb
Author: Jeff Garzik <jeff@garzik.org>
Date: Thu Apr 16 22:13:27 2009 -0400

[libata] mv-ahci: Add Marvell PATA support

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/ahci.h | 12
drivers/ata/libahci.c | 92 ++----
drivers/ata/mv-ahci.c | 748 +++++++++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 782 insertions(+), 70 deletions(-)
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index cf5b9d8..57c792a 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -129,7 +129,6 @@ enum {
AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
- AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
AHCI_HFLAG_NO_HOTPLUG = (1 << 7), /* ignore PxSERR.DIAG.N */
@@ -149,6 +148,8 @@ enum {
EM_CTL_RST = (1 << 9), /* Reset */
EM_CTL_TM = (1 << 8), /* Transmit Message */
EM_CTL_ALHD = (1 << 26), /* Activity LED */
+
+ AHCI_FLAG_MV_PATA = (1 << 30),
};

enum {
@@ -211,6 +212,9 @@ struct ahci_port_priv {
unsigned int ncq_saw_dmas:1;
unsigned int ncq_saw_sdb:1;
u32 intr_mask; /* interrupts to enable */
+
+ int mvp_selected;
+
struct ahci_em_priv em_priv[AHCI_MAX_SLOTS];
/* enclosure management info per PM slot */
};
@@ -273,6 +277,12 @@ extern ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
extern ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
extern void ahci_print_info(struct ata_host *host);
extern void ahci_port_intr(struct ata_port *ap);
+extern void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, u32 opts);
+extern unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
+extern int ahci_deinit_port(struct ata_port *ap, const char **emsg);
+extern void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
+ int port_no, void __iomem *mmio,
+ void __iomem *port_mmio);

#ifdef CONFIG_PM
extern int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 929d555..280638a 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -13,8 +13,6 @@ static int ahci_skip_host_reset;
static void ahci_init_sw_activity(struct ata_link *link);
static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
ssize_t size);
-static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
- u32 opts);
static void ahci_enable_ahci(void __iomem *mmio);

module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
@@ -190,12 +188,7 @@ static void ahci_start_fis_rx(struct ata_port *ap)
struct ahci_port_priv *pp = ap->private_data;
u32 tmp;

- /* set FIS registers */
- if (hpriv->cap & HOST_CAP_64)
- writel((pp->cmd_slot_dma >> 16) >> 16,
- port_mmio + PORT_LST_ADDR_HI);
- writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
-
+ /* program DMA data structures address */
if (hpriv->cap & HOST_CAP_64)
writel((pp->rx_fis_dma >> 16) >> 16,
port_mmio + PORT_FIS_ADDR_HI);
@@ -231,14 +224,23 @@ static int ahci_stop_fis_rx(struct ata_port *ap)

static void ahci_start_port(struct ata_port *ap)
{
+ struct ahci_host_priv *hpriv = ap->host->private_data;
struct ahci_port_priv *pp = ap->private_data;
+ void __iomem *port_mmio = ahci_port_base(ap);
struct ata_link *link;
struct ahci_em_priv *emp;
ssize_t rc;
int i;

+ /* program command list DMA data structure addresses */
+ if (hpriv->cap & HOST_CAP_64)
+ writel((pp->cmd_slot_dma >> 16) >> 16,
+ port_mmio + PORT_LST_ADDR_HI);
+ writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
+
/* enable FIS reception */
- ahci_start_fis_rx(ap);
+ if (!(ap->flags & AHCI_FLAG_MV_PATA))
+ ahci_start_fis_rx(ap);

/* enable DMA */
ahci_start_engine(ap);
@@ -267,7 +269,7 @@ static void ahci_start_port(struct ata_port *ap)

}

-static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
+int ahci_deinit_port(struct ata_port *ap, const char **emsg)
{
int rc;

@@ -279,16 +281,19 @@ static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
}

/* disable FIS reception */
- rc = ahci_stop_fis_rx(ap);
- if (rc) {
- *emsg = "failed stop FIS RX";
- return rc;
+ if (!(ap->flags & AHCI_FLAG_MV_PATA)) {
+ rc = ahci_stop_fis_rx(ap);
+ if (rc) {
+ *emsg = "failed stop FIS RX";
+ return rc;
+ }
}

return 0;
}
+EXPORT_SYMBOL_GPL(ahci_deinit_port);

-static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
+void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
int port_no, void __iomem *mmio,
void __iomem *port_mmio)
{
@@ -309,12 +314,14 @@ static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,

/* clear port IRQ */
tmp = readl(port_mmio + PORT_IRQ_STAT);
- VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
- if (tmp)
+ if (tmp) {
+ VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
writel(tmp, port_mmio + PORT_IRQ_STAT);
+ }

writel(1 << port_no, mmio + HOST_IRQ_STAT);
}
+EXPORT_SYMBOL_GPL(ahci_port_init);

int ahci_port_start(struct ata_port *ap)
{
@@ -419,29 +426,11 @@ EXPORT_SYMBOL_GPL(ahci_configure_dma_masks);

void ahci_init_controller(struct ata_host *host)
{
- struct ahci_host_priv *hpriv = host->private_data;
struct pci_dev *pdev = to_pci_dev(host->dev);
void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
int i;
void __iomem *port_mmio;
u32 tmp;
- int mv;
-
- if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
- if (pdev->device == 0x6121)
- mv = 2;
- else
- mv = 4;
- port_mmio = __ahci_port_base(host, mv);
-
- writel(0, port_mmio + PORT_IRQ_MASK);
-
- /* clear port IRQ */
- tmp = readl(port_mmio + PORT_IRQ_STAT);
- VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
- if (tmp)
- writel(tmp, port_mmio + PORT_IRQ_STAT);
- }

for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];
@@ -482,7 +471,6 @@ void ahci_save_initial_config(struct pci_dev *pdev,
void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
u32 cap, port_map;
int i;
- int mv;

/* make sure AHCI mode is enabled before accessing CAP */
ahci_enable_ahci(mmio);
@@ -526,26 +514,6 @@ void ahci_save_initial_config(struct pci_dev *pdev,
port_map = 1;
}

- /*
- * Temporary Marvell 6145 hack: PATA port presence
- * is asserted through the standard AHCI port
- * presence register, as bit 4 (counting from 0)
- */
- if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
- if (pdev->device == 0x6121)
- mv = 0x3;
- else
- mv = 0xf;
- dev_printk(KERN_ERR, &pdev->dev,
- "MV_AHCI HACK: port_map %x -> %x\n",
- port_map,
- port_map & mv);
- dev_printk(KERN_ERR, &pdev->dev,
- "Disabling your PATA port. Use the boot option 'ahci.marvell_enable=0' to avoid this.\n");
-
- port_map &= mv;
- }
-
/* cross check port_map and cap.n_ports */
if (port_map) {
int map_ports = 0;
@@ -693,6 +661,9 @@ static void ahci_power_up(struct ata_port *ap)
void __iomem *port_mmio = ahci_port_base(ap);
u32 cmd;

+ if (ap->flags & AHCI_FLAG_MV_PATA)
+ return;
+
cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;

/* spin up device */
@@ -712,6 +683,8 @@ static void ahci_power_down(struct ata_port *ap)
void __iomem *port_mmio = ahci_port_base(ap);
u32 cmd, scontrol;

+ if (ap->flags & AHCI_FLAG_MV_PATA)
+ return;
if (!(hpriv->cap & HOST_CAP_SSS))
return;

@@ -1173,8 +1146,7 @@ static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
return size;
}

-static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
- u32 opts)
+void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, u32 opts)
{
dma_addr_t cmd_tbl_dma;

@@ -1185,8 +1157,9 @@ static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
}
+EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);

-static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
+unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
{
struct scatterlist *sg;
struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
@@ -1208,6 +1181,7 @@ static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)

return si;
}
+EXPORT_SYMBOL_GPL(ahci_fill_sg);

void ahci_qc_prep(struct ata_queued_cmd *qc)
{
diff --git a/drivers/ata/mv-ahci.c b/drivers/ata/mv-ahci.c
index 0a3ac6c..a19b979 100644
--- a/drivers/ata/mv-ahci.c
+++ b/drivers/ata/mv-ahci.c
@@ -55,6 +55,69 @@ enum {
board_ahci_mv = 0,
};

+enum mvp_specific_registers {
+ MVP_D0_TF0 = 0x20, /* dev0 taskfile part 1 */
+ MVP_D0_TF1 = 0x24, /* dev0 taskfile part 2 */
+ MVP_D0_TF2 = 0x28, /* dev0 taskfile part 3 */
+ MVP_D1_TF0 = 0x2C, /* dev1 taskfile part 1 */
+ MVP_D1_TF1 = 0x30, /* dev1 taskfile part 2 */
+ MVP_D1_TF2 = 0x3C, /* dev1 taskfile part 3 */
+};
+
+enum mvp_specific_bits {
+ /* PORT_CMD register */
+ MVP_CMD_CDB_LEN = 24, /* CDB length offset (5 bits) */
+ MVP_CMD_HW_RST = (1 << 3), /* Generate H_RESET_N to
+ * attached devices.
+ * Self de-asserting.
+ */
+ MVP_CMD_DMA_STAT_CK = (1 << 2), /* chk status after DMA cmd */
+ MVP_CMD_DEV_INT_EN = (1 << 1), /* device interrupt enabled */
+
+ /* PORT_IRQ_[STAT,MASK] register bits */
+ MVP_IRQ_D0_INTRQ = (1 << 0), /* dev0 INTRQ line */
+ MVP_IRQ_D0_ERR = (1 << 1), /* ERR in dev0 Status reg */
+ MVP_IRQ_D1_INTRQ = (1 << 2), /* dev1 INTRQ line */
+ MVP_IRQ_D1_ERR = (1 << 3), /* ERR in dev1 Status reg */
+ MVP_IRQ_ERROR = MVP_IRQ_D0_ERR | MVP_IRQ_D1_ERR,
+ DEF_MVP_IRQ = MVP_IRQ_ERROR |
+ MVP_IRQ_D0_INTRQ | MVP_IRQ_D1_INTRQ,
+
+ /* command slot options */
+ MVP_CMD_DEV1 = (1 << 15), /* dev0 == 0, dev1 == 1 */
+ MVP_CMD_ATAPI_RST = (1 << 14), /* cmd==ATA_CMD_DEV_RESET */
+ MVP_CMD_EDD = (1 << 13), /* cmd==ATA_CMD_EDD */
+ MVP_CMD_LBA48 = (1 << 12), /* is an LBA48 cmd */
+ MVP_CMD_PIO_SECT = (1 << 11), /* PIO single/mult sector cmd */
+ MVP_CMD_NODATA = (1 << 10), /* is a non-data cmd */
+ MVP_CMD_READ = (1 << 9), /* data-in (dev->host) */
+ MVP_CMD_DMA = (1 << 8), /* ATA or ATAPI DMA */
+ MVP_CMD_ATAPI = (1 << 7), /* is a PACKET cmd */
+ MVP_CMD_TCQ = (1 << 6), /* is a legacy TCQ cmd */
+ MVP_CMD_CONTROLLER = (1 << 5), /* PATA controller command */
+
+ MVATA_REG_DATA = ATA_REG_DATA + 0x08,
+ MVATA_REG_ERR = ATA_REG_ERR + 0x08,
+ MVATA_REG_NSECT = ATA_REG_NSECT + 0x08,
+ MVATA_REG_LBAL = ATA_REG_LBAL + 0x08,
+ MVATA_REG_LBAM = ATA_REG_LBAM + 0x08,
+ MVATA_REG_LBAH = ATA_REG_LBAH + 0x08,
+ MVATA_REG_DEVICE = ATA_REG_DEVICE + 0x08,
+ MVATA_REG_STATUS = ATA_REG_STATUS + 0x08,
+ MVATA_REG_DEVCTL = 0x16,
+ MVATA_REG_ALTSTATUS = MVATA_REG_DEVCTL,
+};
+
+static void mvp_dev_select(struct ata_port *ap, unsigned int device);
+static u8 mvp_check_status(struct ata_port *ap);
+static void mvp_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
+static void mvp_qc_prep(struct ata_queued_cmd *qc);
+static int mvp_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
+static int mvp_softreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
+static int mvp_port_start(struct ata_port *ap);
+
static struct device_attribute *mv_ahci_shost_attrs[] = {
&dev_attr_link_power_management_policy,
&dev_attr_em_message_type,
@@ -77,7 +140,7 @@ static struct scsi_host_template mv_ahci_sht = {
.sdev_attrs = mv_ahci_sdev_attrs,
};

-static struct ata_port_operations mv_ahci_ops = {
+static struct ata_port_operations mv_sata_ops = {
.inherits = &sata_pmp_port_ops,

.qc_defer = sata_pmp_qc_defer_cmd_switch,
@@ -113,16 +176,41 @@ static struct ata_port_operations mv_ahci_ops = {
.port_stop = ahci_port_stop,
};

+static struct ata_port_operations mv_pata_ops = {
+ .inherits = &ata_sff_port_ops,
+
+ .qc_prep = mvp_qc_prep,
+ .qc_issue = ahci_qc_issue,
+
+ .freeze = ahci_freeze,
+ .thaw = ahci_thaw,
+ .hardreset = mvp_hardreset,
+ .softreset = mvp_softreset,
+ .error_handler = ahci_error_handler,
+ .post_internal_cmd = ahci_post_internal_cmd,
+
+ .sff_dev_select = mvp_dev_select,
+ .sff_check_status = mvp_check_status,
+ .sff_check_altstatus = mvp_check_status,
+ .sff_tf_read = mvp_tf_read,
+
+#ifdef CONFIG_PM
+ .port_suspend = ahci_port_suspend,
+ .port_resume = ahci_port_resume,
+#endif
+ .port_start = mvp_port_start,
+ .port_stop = ahci_port_stop,
+};
+
static const struct ata_port_info mv_ahci_port_info[] = {
[board_ahci_mv] =
{
- AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI |
- AHCI_HFLAG_MV_PATA | AHCI_HFLAG_NO_PMP),
+ AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI),
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
.pio_mask = ATA_PIO4,
.udma_mask = ATA_UDMA6,
- .port_ops = &mv_ahci_ops,
+ .port_ops = &mv_sata_ops,
},
};

@@ -151,6 +239,590 @@ module_param(ahci_em_messages, int, 0444);
MODULE_PARM_DESC(ahci_em_messages,
"Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");

+/* WARNING: the following doesn't clear the interrupt, it's
+ * a read-only view of the device's ATA shadow registers
+ */
+static u8 mvp_check_status(struct ata_port *ap)
+{
+ void __iomem *mmio = ahci_port_base(ap);
+ struct ahci_port_priv *pp = ap->private_data;
+
+ if (pp->mvp_selected == 0)
+ mmio += MVP_D0_TF0;
+ else
+ mmio += MVP_D1_TF0;
+
+ return readl(mmio); /* lower 8 bits are Status */
+}
+
+static void ahci_dump_port_common(struct ata_port *ap)
+{
+ void __iomem *mmio = ahci_port_base(ap);
+
+ printk(KERN_ERR
+ "%s %x, "
+ "%s %x, "
+ "%s %x, "
+ "%s %x, "
+ "%s %x, "
+ "%s %x, "
+ "%s %x\n"
+ ,
+ "PORT_LST_ADDR", readl(mmio + PORT_LST_ADDR),
+ "PORT_LST_ADDR_HI", readl(mmio + PORT_LST_ADDR_HI),
+ "PORT_IRQ_STAT", readl(mmio + PORT_IRQ_STAT),
+ "PORT_IRQ_MASK", readl(mmio + PORT_IRQ_MASK),
+ "PORT_CMD", readl(mmio + PORT_CMD),
+ "PORT_CMD_ISSUE",readl(mmio + PORT_CMD_ISSUE),
+ "PORT_SIG", readl(mmio + PORT_SIG));
+}
+
+static void mvp_dump_port(struct ata_port *ap)
+{
+ void __iomem *mmio = ahci_port_base(ap);
+
+ printk(KERN_ERR
+ "TF dev0 %x %x %x, dev1 %x %x %x\n",
+ readl(mmio + MVP_D0_TF0),
+ readl(mmio + MVP_D0_TF1),
+ readl(mmio + MVP_D0_TF2),
+
+ readl(mmio + MVP_D1_TF0),
+ readl(mmio + MVP_D1_TF1),
+ readl(mmio + MVP_D1_TF2)
+
+ );
+}
+
+static void ahci_dump_port_sata(struct ata_port *ap)
+{
+ void __iomem *mmio = ahci_port_base(ap);
+
+ printk(KERN_ERR
+ "%s %x, "
+ "%s %x, "
+ "%s %x, "
+ "%s %x, "
+ "%s %x\n"
+ ,
+ "PORT_SCR_STAT",
+ readl(mmio + PORT_SCR_STAT),
+ "PORT_SCR_CTL",
+ readl(mmio + PORT_SCR_CTL),
+ "PORT_SCR_ERR",
+ readl(mmio + PORT_SCR_ERR),
+ "PORT_SCR_ACT",
+ readl(mmio + PORT_SCR_ACT),
+ "PORT_SCR_NTF",
+ readl(mmio + PORT_SCR_NTF)
+ );
+}
+
+static void mv_ahci_dump_port(struct ata_port *ap)
+{
+ ahci_dump_port_common(ap);
+
+ if (ap->flags & AHCI_FLAG_MV_PATA) {
+ mvp_dump_port(ap);
+ } else {
+ ahci_dump_port_sata(ap);
+ }
+}
+
+/* WARNING: the following doesn't clear the interrupt, it's
+ * a read-only view of the device's ATA shadow registers
+ */
+static void mvp_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+ void __iomem *mmio = ahci_port_base(ap);
+ struct ahci_port_priv *pp = ap->private_data;
+ u32 val;
+
+ if (pp->mvp_selected == 0)
+ val = readl(mmio + MVP_D0_TF0);
+ else
+ val = readl(mmio + MVP_D1_TF0);
+ tf->feature = val >> 24;
+ tf->device = val >> 8;
+ tf->command = val;
+
+ if (pp->mvp_selected == 0)
+ val = readl(mmio + MVP_D0_TF1);
+ else
+ val = readl(mmio + MVP_D1_TF1);
+ tf->nsect = val >> 24;
+ tf->hob_nsect = val >> 16;
+ tf->lbal = val >> 8;
+ tf->hob_lbal = val;
+
+ if (pp->mvp_selected == 0)
+ val = readl(mmio + MVP_D0_TF2);
+ else
+ val = readl(mmio + MVP_D1_TF2);
+ tf->lbam = val >> 24;
+ tf->hob_lbam = val >> 16;
+ tf->lbah = val >> 8;
+ tf->hob_lbah = val;
+}
+
+static void mvp_qc_prep(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ int is_atapi = ata_is_atapi(qc->tf.protocol);
+ void *cmd_tbl;
+ u32 *cmd_block;
+ u32 opts;
+ unsigned int n_elem;
+
+ /*
+ * Fill in command table information. First, the header,
+ * a SATA Register - Host to Device command FIS.
+ */
+ cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
+
+ cmd_block = cmd_tbl;
+ cmd_block[0] = cpu_to_le32(
+ ((u32)qc->tf.feature) |
+ (((u32)qc->tf.hob_feature) << 8) |
+ (((u32)qc->tf.nsect) << 16) |
+ (((u32)qc->tf.hob_nsect) << 24));
+ cmd_block[1] = cpu_to_le32(
+ ((u32)qc->tf.lbal) |
+ (((u32)qc->tf.hob_lbal) << 8) |
+ (((u32)qc->tf.lbam) << 16) |
+ (((u32)qc->tf.hob_lbam) << 24));
+ cmd_block[2] = cpu_to_le32(
+ ((u32)qc->tf.command) |
+ (((u32)qc->tf.device) << 8) |
+ (((u32)qc->tf.lbah) << 16) |
+ (((u32)qc->tf.hob_lbah) << 24));
+
+ if (is_atapi) {
+ memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
+ memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
+ }
+
+ n_elem = 0;
+ if (qc->flags & ATA_QCFLAG_DMAMAP)
+ n_elem = ahci_fill_sg(qc, cmd_tbl);
+
+ /*
+ * Fill in command slot information.
+ */
+ opts = n_elem << 16;
+ if (qc->dev->devno == 1)
+ opts |= MVP_CMD_DEV1;
+
+ if (qc->tf.command == ATA_CMD_DEV_RESET)
+ opts |= MVP_CMD_ATAPI_RST;
+ else if (qc->tf.command == ATA_CMD_EDD)
+ opts |= MVP_CMD_EDD;
+
+ if (qc->tf.flags & ATA_TFLAG_LBA48)
+ opts |= MVP_CMD_LBA48;
+ if (qc->tf.protocol == ATA_PROT_PIO)
+ opts |= MVP_CMD_PIO_SECT;
+ if (ata_is_nodata(qc->tf.protocol))
+ opts |= MVP_CMD_NODATA;
+ if (!(qc->tf.flags & ATA_TFLAG_WRITE))
+ opts |= MVP_CMD_READ;
+ if (ata_is_dma(qc->tf.protocol))
+ opts |= MVP_CMD_DMA;
+ if (is_atapi)
+ opts |= MVP_CMD_ATAPI;
+
+ if (is_multi_taskfile(&qc->tf))
+ opts |= (qc->dev->multi_count & 0x1f);
+ else
+ opts |= 1;
+
+ ahci_fill_cmd_slot(pp, qc->tag, opts);
+}
+
+static void mvp_error_intr(struct ata_port *ap, u32 irq_stat)
+{
+ struct ata_queued_cmd *qc;
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ unsigned int err_mask = 0, action = 0;
+
+ DPRINTK("ENTER\n");
+
+ ata_ehi_clear_desc(ehi);
+
+ /* analyze @irq_stat */
+ ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
+
+ if (irq_stat & (MVP_IRQ_D0_ERR | MVP_IRQ_D1_ERR))
+ err_mask |= AC_ERR_DEV;
+
+ ehi->action |= action;
+
+ qc = ata_qc_from_tag(ap, ap->link.active_tag);
+ if (qc)
+ qc->err_mask |= err_mask;
+ else
+ ehi->err_mask |= err_mask;
+
+ ata_port_abort(ap);
+}
+
+static void mvp_port_intr(struct ata_port *ap)
+{
+ void __iomem *port_mmio = ahci_port_base(ap);
+ u32 status, qc_active;
+ int rc;
+
+ VPRINTK("ENTER, port == %u\n", ap->port_no);
+
+ status = readl(port_mmio + PORT_IRQ_STAT);
+ writel(status, port_mmio + PORT_IRQ_STAT);
+
+ if (unlikely(status & MVP_IRQ_ERROR)) {
+ mvp_error_intr(ap, status);
+ return;
+ }
+
+ qc_active = readl(port_mmio + PORT_CMD_ISSUE);
+
+ rc = ata_qc_complete_multiple(ap, qc_active);
+ if (rc > 0)
+ return;
+ if (rc < 0) {
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ ehi->err_mask |= AC_ERR_HSM;
+ ehi->action |= ATA_EH_SOFTRESET;
+ ata_port_freeze(ap);
+ return;
+ }
+
+ /* if we get here... spurious interrupt? */
+}
+
+static int mvp_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ void __iomem *port_mmio = ahci_port_base(ap);
+ u32 tmp;
+
+ DPRINTK("ENTER\n");
+
+#if 0
+ ahci_stop_engine(ap);
+#endif
+
+ tmp = readl(port_mmio + PORT_CMD);
+ tmp |= MVP_CMD_HW_RST;
+ writel(tmp, port_mmio + PORT_CMD);
+ readl(port_mmio + PORT_CMD); /* flush */
+
+ udelay(20); /* paranoia - give bit time to assert? */
+
+ tmp = ata_wait_register(port_mmio + PORT_CMD,
+ MVP_CMD_HW_RST, MVP_CMD_HW_RST, 1, 500);
+ if (tmp & MVP_CMD_HW_RST) {
+ ata_port_printk(ap, KERN_ERR,
+ "hard reset timed out (errno=%d)\n", -EIO);
+ return -EIO;
+ }
+
+ msleep(2);
+
+#if 0
+ ahci_start_engine(ap);
+#endif
+
+ mv_ahci_dump_port(ap);
+
+ DPRINTK("EXIT EAGAIN (force softreset)\n");
+ return -EAGAIN;
+}
+
+static void mvp_mk_ctrl_cmd(void *cmd_block, int cmd_idx, bool read_tf,
+ bool is_slave, u8 tf_addr, u8 tf_data)
+{
+ int dw_idx = cmd_idx / 2;
+ u32 tmp, *dw;
+ u32 new_val = 0, tmp_mask = 0xffff0000;
+
+ /* initialize 16-bit controller command */
+ if (read_tf)
+ new_val |= (1 << 14); /* 0=write tf, 1=read tf */
+ if (is_slave)
+ new_val |= (1 << 13); /* 0=master, 1=slave */
+ new_val |= ((tf_addr & 0x1f) << 8); /* TF register address */
+ new_val |= tf_data; /* TF register data */
+
+ /* determine if value is stored in upper or lower 16 bits */
+ if (cmd_idx & 1) {
+ new_val <<= 16;
+ tmp_mask = 0x0000ffff;
+ }
+
+ /* store in command block */
+ dw = cmd_block;
+ tmp = le32_to_cpu(dw[dw_idx]);
+ tmp = (tmp & tmp_mask) | new_val;
+ dw[dw_idx] = cpu_to_le32(tmp);
+}
+
+static bool mvp_ctrl_cmd(struct ata_port *ap, struct ahci_port_priv *pp,
+ void __iomem *mmio, void __iomem *port_mmio,
+ bool is_slave, u8 tf_addr, u8 tf_data,
+ unsigned long timeout_msecs)
+{
+ void *cmd_tbl;
+ u32 opts, tmp;
+ void __iomem *poll_mmio = port_mmio;
+ int i;
+
+ cmd_tbl = pp->cmd_tbl + (0 * AHCI_CMD_TBL_SZ);
+ opts = MVP_CMD_CONTROLLER | 1;
+
+ /* fill in controller cmd #0, in slot #0 */
+ mvp_mk_ctrl_cmd(cmd_tbl, 0, false, is_slave, tf_addr, tf_data);
+ ahci_fill_cmd_slot(pp, 0, opts);
+
+ /* issue PATA controller command */
+ writel(1, port_mmio + PORT_CMD_ISSUE);
+ readl(port_mmio + PORT_CMD_ISSUE); /* flush */
+
+ /* wait for bit 0 to clear */
+ tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
+ 1, timeout_msecs);
+ if (tmp) {
+ ata_port_printk(ap, KERN_WARNING,
+ "PATA ctrl cmd issue timeout (%x, %s)\n",
+ tmp,
+ is_slave ? "slave" : "master");
+
+ return false;
+ }
+
+ tmp = readl(port_mmio + PORT_IRQ_STAT);
+ writel(tmp, port_mmio + PORT_IRQ_STAT);
+ writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
+
+ if (is_slave)
+ poll_mmio += MVP_D1_TF0;
+ else
+ poll_mmio += MVP_D0_TF0;
+
+ for (i = 0; i < 1000; i++) {
+ tmp = readl(poll_mmio) & 0xff;
+ if ((tmp & ATA_BUSY) == 0)
+ return true;
+
+ msleep(1);
+ }
+
+ ata_port_printk(ap, KERN_INFO, "PATA ctrl cmd BSY timeout (%x, %s)\n",
+ tmp,
+ is_slave ? "slave" : "master");
+
+ /* if any bits remain set, the operation has not completed (fail) */
+ return false;
+}
+
+static int mvp_softreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ struct ahci_port_priv *pp = ap->private_data;
+ void __iomem *port_mmio = ahci_port_base(ap);
+ void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
+#if 0
+ const char *reason = NULL;
+ int rc;
+#endif
+ unsigned long now, msecs;
+ int i, j;
+ u8 err = 0;
+ bool is_slave;
+
+ DPRINTK("ENTER\n");
+
+#if 0
+ /* prepare for SRST (AHCI-1.1 10.4.1) */
+ rc = ahci_kick_engine(ap, 1);
+ if (rc && rc != -EOPNOTSUPP)
+ ata_link_printk(link, KERN_WARNING,
+ "failed to reset engine (errno=%d)\n", rc);
+#endif
+
+ msecs = 0;
+ now = jiffies;
+ if (time_after(now, deadline))
+ msecs = jiffies_to_msecs(deadline - now);
+ else
+ msecs = 1000;
+
+ /* issue SRST=1 */
+ mvp_ctrl_cmd(ap, pp, mmio, port_mmio, false, MVATA_REG_DEVCTL, ATA_SRST,
+ msecs);
+ udelay(20);
+
+ /* issue SRST=0 */
+ mvp_ctrl_cmd(ap, pp, mmio, port_mmio, false, MVATA_REG_DEVCTL, 0,
+ msecs);
+ msleep(150);
+
+ is_slave = false;
+ for (i = 0; i < 2; i++) {
+ bool ccrc;
+
+ for (j = 0; j < 5; j++) {
+ ccrc = mvp_ctrl_cmd(ap, pp, mmio, port_mmio, is_slave,
+ MVATA_REG_DEVICE,
+ ATA_DEVICE_OBS | (is_slave ? ATA_DEV1 : 0),
+ 1000);
+ if (ccrc)
+ break;
+ }
+
+ is_slave = true;
+ }
+
+ mv_ahci_dump_port(ap);
+
+ class[0] = ata_sff_dev_classify(&link->device[0], 1, &err);
+ if (err != 0x81)
+ class[1] = ata_sff_dev_classify(&link->device[1], 1, &err);
+
+ DPRINTK("EXIT success, class=%u,%u\n", class[0], class[1]);
+ return 0;
+
+#if 0
+ fail:
+ ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
+ return rc;
+#endif
+}
+
+static void mvp_dev_select(struct ata_port *ap, unsigned int device)
+{
+ struct ahci_port_priv *pp = ap->private_data;
+ void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
+ void __iomem *port_mmio = ahci_port_base(ap);
+ bool ccrc;
+
+ DPRINTK("ENTER\n");
+
+ pp->mvp_selected = device;
+
+ ccrc = mvp_ctrl_cmd(ap, pp, mmio, port_mmio, device ? true : false,
+ MVATA_REG_DEVICE,
+ ATA_DEVICE_OBS | (device ? ATA_DEV1 : 0),
+ 500);
+ if (!ccrc)
+ ata_port_printk(ap, KERN_ERR, "mvp_dev_select dev%u "
+ "failed\n", device);
+}
+
+static void mvp_port_init(struct pci_dev *pdev, struct ata_port *ap,
+ int port_no, void __iomem *mmio,
+ void __iomem *port_mmio)
+{
+ int rc;
+ u32 tmp;
+ const char *emsg = NULL;
+
+ VPRINTK("ENTER, port_no == %d\n", port_no);
+
+ /* make sure port is not active */
+ rc = ahci_deinit_port(ap, &emsg);
+ if (rc)
+ dev_printk(KERN_WARNING, &pdev->dev,
+ "%s (%d)\n", emsg, rc);
+
+ /* clear port IRQ */
+ tmp = readl(port_mmio + PORT_IRQ_STAT);
+ if (tmp) {
+ VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
+ writel(tmp, port_mmio + PORT_IRQ_STAT);
+ }
+
+ writel(1 << port_no, mmio + HOST_IRQ_STAT);
+
+ /* select the IRQ events we're interested in */
+ writel(DEF_MVP_IRQ, port_mmio + PORT_IRQ_MASK);
+
+ /* init PATA port setup */
+ tmp = MVP_CMD_DEV_INT_EN;
+ tmp |= (12 << MVP_CMD_CDB_LEN); /* TODO: un-hardcode cdb len */
+ writel(tmp, port_mmio + PORT_CMD);
+
+ msleep(100); /* Marvell driver does this after writing PORT_CMD */
+}
+
+static int mvp_port_start(struct ata_port *ap)
+{
+ struct device *dev = ap->host->dev;
+ struct ahci_port_priv *pp;
+ void __iomem *port_mmio = ahci_port_base(ap);
+ void *mem;
+ dma_addr_t mem_dma;
+
+ DPRINTK("ENTER\n");
+
+ pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
+ if (!pp)
+ return -ENOMEM;
+
+ mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
+ GFP_KERNEL);
+ if (!mem)
+ return -ENOMEM;
+ memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
+
+ /*
+ * First item in chunk of DMA memory: 32-slot command table,
+ * 32 bytes each in size
+ */
+ pp->cmd_slot = mem;
+ pp->cmd_slot_dma = mem_dma;
+
+ mem += AHCI_CMD_SLOT_SZ;
+ mem_dma += AHCI_CMD_SLOT_SZ;
+
+ /*
+ * Second item: Received-FIS area
+ */
+ pp->rx_fis = mem;
+ pp->rx_fis_dma = mem_dma;
+
+ mem += AHCI_RX_FIS_SZ;
+ mem_dma += AHCI_RX_FIS_SZ;
+
+ /*
+ * Third item: data area for storing a single command
+ * and its scatter-gather table
+ */
+ pp->cmd_tbl = mem;
+ pp->cmd_tbl_dma = mem_dma;
+
+ /*
+ * Save off initial list of interrupts to be enabled.
+ * This could be changed later
+ */
+ pp->intr_mask = DEF_MVP_IRQ;
+
+ ap->private_data = pp;
+
+ /* program command list DMA data structure addresses */
+ writel((pp->cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
+ writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
+
+ /* enable DMA */
+ ahci_start_engine(ap);
+
+ msleep(100); /* Marvell driver does this after writing PORT_CMD */
+
+ DPRINTK("EXIT(0)\n");
+ return 0;
+}
+
static irqreturn_t mv_ahci_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
@@ -159,8 +831,6 @@ static irqreturn_t mv_ahci_interrupt(int irq, void *dev_instance)
void __iomem *mmio;
u32 irq_stat, irq_masked;

- VPRINTK("ENTER\n");
-
hpriv = host->private_data;
mmio = host->iomap[AHCI_PCI_BAR];

@@ -169,6 +839,8 @@ static irqreturn_t mv_ahci_interrupt(int irq, void *dev_instance)
if (!irq_stat)
return IRQ_NONE;

+ VPRINTK("ENTER, irq_stat 0x%x\n", irq_stat);
+
irq_masked = irq_stat & hpriv->port_map;

spin_lock(&host->lock);
@@ -181,7 +853,10 @@ static irqreturn_t mv_ahci_interrupt(int irq, void *dev_instance)

ap = host->ports[i];
if (ap) {
- ahci_port_intr(ap);
+ if (ap->flags & AHCI_FLAG_MV_PATA)
+ mvp_port_intr(ap);
+ else
+ ahci_port_intr(ap);
VPRINTK("port %u\n", i);
} else {
VPRINTK("port %u (no irq)\n", i);
@@ -211,6 +886,34 @@ static irqreturn_t mv_ahci_interrupt(int irq, void *dev_instance)
return IRQ_RETVAL(handled);
}

+static void mv_ahci_init_controller(struct ata_host *host)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+ void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
+ int i;
+ void __iomem *port_mmio;
+ u32 tmp;
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+
+ port_mmio = ahci_port_base(ap);
+ if (ata_port_is_dummy(ap))
+ continue;
+
+ if (ap->flags & AHCI_FLAG_MV_PATA)
+ mvp_port_init(pdev, ap, i, mmio, port_mmio);
+ else
+ ahci_port_init(pdev, ap, i, mmio, port_mmio);
+ }
+
+ tmp = readl(mmio + HOST_CTL);
+ VPRINTK("HOST_CTL 0x%x\n", tmp);
+ writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
+ tmp = readl(mmio + HOST_CTL);
+ VPRINTK("HOST_CTL 0x%x\n", tmp);
+}
+
static int mv_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
@@ -220,7 +923,7 @@ static int mv_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *en
struct device *dev = &pdev->dev;
struct ahci_host_priv *hpriv;
struct ata_host *host;
- int n_ports, i, rc;
+ int n_ports, i, rc, mvp_port;

VPRINTK("ENTER\n");

@@ -306,6 +1009,15 @@ static int mv_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *en
if (pi.flags & ATA_FLAG_EM)
ahci_reset_em(host);

+ switch (pdev->device) {
+ case 0x6121:
+ mvp_port = 2; /* count starts from zero */
+ break;
+ default:
+ mvp_port = 4; /* count starts from zero */
+ break;
+ }
+
for (i = 0; i < host->n_ports; i++) {
struct ata_port *ap = host->ports[i];

@@ -320,10 +1032,26 @@ static int mv_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *en
if (ap->flags & ATA_FLAG_EM)
ap->em_message_type = ahci_em_messages;

+ /* switch to Marvell PATA port operations, flags */
+ if ((i == mvp_port) && (hpriv->port_map & (1 << i))) {
+ ap->flags = ATA_FLAG_SLAVE_POSS |
+ ATA_FLAG_NO_LEGACY |
+ ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
+ AHCI_FLAG_MV_PATA;
+ ap->ops = &mv_pata_ops;
+
+ VPRINTK("set up PATA port %d\n", i);
+ }

/* disabled/not-implemented port */
- if (!(hpriv->port_map & (1 << i)))
+ else if (!(hpriv->port_map & (1 << i))) {
ap->ops = &ata_dummy_port_ops;
+ VPRINTK("set up dummy port %d\n", i);
+ }
+
+ else {
+ VPRINTK("set up SATA port %d\n", i);
+ }
}

/* initialize adapter */
@@ -335,7 +1063,7 @@ static int mv_ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *en
if (rc)
return rc;

- ahci_init_controller(host);
+ mv_ahci_init_controller(host);
ahci_print_info(host);

pci_set_master(pdev);

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  Last update: 2009-04-17 04:45    [from the cache]
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