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-rw-r--r--drivers/ata/Kconfig29
-rw-r--r--drivers/ata/Makefile4
-rw-r--r--drivers/ata/ahci.c2
-rw-r--r--drivers/ata/ahci_platform.c26
-rw-r--r--drivers/ata/ata_generic.c4
-rw-r--r--drivers/ata/ata_piix.c8
-rw-r--r--drivers/ata/libata-core.c181
-rw-r--r--drivers/ata/libata-eh.c5
-rw-r--r--drivers/ata/libata-scsi.c14
-rw-r--r--drivers/ata/libata-sff.c9
-rw-r--r--drivers/ata/libata.h1
-rw-r--r--drivers/ata/pata_pcmcia.c38
-rw-r--r--drivers/ata/pata_pxa.c411
-rw-r--r--drivers/ata/pata_samsung_cf.c683
-rw-r--r--drivers/ata/pata_scc.c3
-rw-r--r--drivers/ata/sata_dwc_460ex.c1756
-rw-r--r--drivers/ata/sata_fsl.c20
-rw-r--r--drivers/ata/sata_mv.c47
-rw-r--r--drivers/ata/sata_nv.c32
19 files changed, 3064 insertions, 209 deletions
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index aa85a98d3a4f..65e3e2708371 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -187,6 +187,15 @@ config ATA_PIIX
If unsure, say N.
+config SATA_DWC
+ tristate "DesignWare Cores SATA support"
+ depends on 460EX
+ help
+ This option enables support for the on-chip SATA controller of the
+ AppliedMicro processor 460EX.
+
+ If unsure, say N.
+
config SATA_MV
tristate "Marvell SATA support"
help
@@ -642,6 +651,17 @@ config PATA_VIA
If unsure, say N.
+config PATA_PXA
+ tristate "PXA DMA-capable PATA support"
+ depends on ARCH_PXA
+ help
+ This option enables support for harddrive attached to PXA CPU's bus.
+
+ NOTE: This driver utilizes PXA DMA controller, in case your hardware
+ is not capable of doing MWDMA, use pata_platform instead.
+
+ If unsure, say N.
+
config PATA_WINBOND
tristate "Winbond SL82C105 PATA support"
depends on PCI
@@ -796,6 +816,15 @@ config PATA_RZ1000
If unsure, say N.
+config PATA_SAMSUNG_CF
+ tristate "Samsung SoC PATA support"
+ depends on SAMSUNG_DEV_IDE
+ help
+ This option enables basic support for Samsung's S3C/S5P board
+ PATA controllers via the new ATA layer
+
+ If unsure, say N.
+
config PATA_WINBOND_VLB
tristate "Winbond W83759A VLB PATA support (Experimental)"
depends on ISA && EXPERIMENTAL
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index 7ef89d73df63..158eaa961b1e 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o
obj-$(CONFIG_SATA_FSL) += sata_fsl.o
obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
+obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
# SFF w/ custom DMA
obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
@@ -87,8 +88,11 @@ obj-$(CONFIG_PATA_OF_PLATFORM) += pata_of_platform.o
obj-$(CONFIG_PATA_QDI) += pata_qdi.o
obj-$(CONFIG_PATA_RB532) += pata_rb532_cf.o
obj-$(CONFIG_PATA_RZ1000) += pata_rz1000.o
+obj-$(CONFIG_PATA_SAMSUNG_CF) += pata_samsung_cf.o
obj-$(CONFIG_PATA_WINBOND_VLB) += pata_winbond.o
+obj-$(CONFIG_PATA_PXA) += pata_pxa.o
+
# Should be last but two libata driver
obj-$(CONFIG_PATA_ACPI) += pata_acpi.o
# Should be last but one libata driver
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index f2522534ae63..fe75d8befc3a 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1042,7 +1042,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
VPRINTK("ENTER\n");
- WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
+ WARN_ON((int)ATA_MAX_QUEUE > AHCI_MAX_CMDS);
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 5e11b160f247..4e97f33cca44 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -54,19 +54,13 @@ static int __init ahci_probe(struct platform_device *pdev)
return -EINVAL;
}
- if (pdata && pdata->init) {
- rc = pdata->init(dev);
- if (rc)
- return rc;
- }
-
if (pdata && pdata->ata_port_info)
pi = *pdata->ata_port_info;
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv) {
- rc = -ENOMEM;
- goto err0;
+ dev_err(dev, "can't alloc ahci_host_priv\n");
+ return -ENOMEM;
}
hpriv->flags |= (unsigned long)pi.private_data;
@@ -74,8 +68,19 @@ static int __init ahci_probe(struct platform_device *pdev)
hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
if (!hpriv->mmio) {
dev_err(dev, "can't map %pR\n", mem);
- rc = -ENOMEM;
- goto err0;
+ return -ENOMEM;
+ }
+
+ /*
+ * Some platforms might need to prepare for mmio region access,
+ * which could be done in the following init call. So, the mmio
+ * region shouldn't be accessed before init (if provided) has
+ * returned successfully.
+ */
+ if (pdata && pdata->init) {
+ rc = pdata->init(dev, hpriv->mmio);
+ if (rc)
+ return rc;
}
ahci_save_initial_config(dev, hpriv,
@@ -166,7 +171,6 @@ static int __devexit ahci_remove(struct platform_device *pdev)
}
static struct platform_driver ahci_driver = {
- .probe = ahci_probe,
.remove = __devexit_p(ahci_remove),
.driver = {
.name = "ahci",
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 7107a6929deb..cc5f7726bde7 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -54,7 +54,6 @@ static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
const struct pci_device_id *id = ap->host->private_data;
int dma_enabled = 0;
struct ata_device *dev;
- struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (id->driver_data & ATA_GEN_FORCE_DMA) {
dma_enabled = 0xff;
@@ -63,9 +62,6 @@ static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
}
- if (pdev->vendor == PCI_VENDOR_ID_CENATEK)
- dma_enabled = 0xFF;
-
ata_for_each_dev(dev, link, ENABLED) {
/* We don't really care */
dev->pio_mode = XFER_PIO_0;
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 7409f98d2ae6..3971bc0a4838 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -158,6 +158,7 @@ struct piix_map_db {
struct piix_host_priv {
const int *map;
u32 saved_iocfg;
+ spinlock_t sidpr_lock; /* FIXME: remove once locking in EH is fixed */
void __iomem *sidpr;
};
@@ -951,12 +952,15 @@ static int piix_sidpr_scr_read(struct ata_link *link,
unsigned int reg, u32 *val)
{
struct piix_host_priv *hpriv = link->ap->host->private_data;
+ unsigned long flags;
if (reg >= ARRAY_SIZE(piix_sidx_map))
return -EINVAL;
+ spin_lock_irqsave(&hpriv->sidpr_lock, flags);
piix_sidpr_sel(link, reg);
*val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
+ spin_unlock_irqrestore(&hpriv->sidpr_lock, flags);
return 0;
}
@@ -964,12 +968,15 @@ static int piix_sidpr_scr_write(struct ata_link *link,
unsigned int reg, u32 val)
{
struct piix_host_priv *hpriv = link->ap->host->private_data;
+ unsigned long flags;
if (reg >= ARRAY_SIZE(piix_sidx_map))
return -EINVAL;
+ spin_lock_irqsave(&hpriv->sidpr_lock, flags);
piix_sidpr_sel(link, reg);
iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
+ spin_unlock_irqrestore(&hpriv->sidpr_lock, flags);
return 0;
}
@@ -1566,6 +1573,7 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv)
return -ENOMEM;
+ spin_lock_init(&hpriv->sidpr_lock);
/* Save IOCFG, this will be used for cable detection, quirk
* detection and restoration on detach. This is necessary
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index ddf8e4862787..7ef7c4f216fa 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -98,8 +98,6 @@ static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
unsigned int ata_print_id = 1;
-struct workqueue_struct *ata_aux_wq;
-
struct ata_force_param {
const char *name;
unsigned int cbl;
@@ -4167,15 +4165,13 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
{ "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
{ "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
- { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
- { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
+ { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
{ "CRD-84", NULL, ATA_HORKAGE_NODMA },
{ "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
{ "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
{ "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
{ "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
- { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
- { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
+ { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
{ "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
{ "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
{ "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
@@ -4211,70 +4207,16 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
/* Seagate NCQ + FLUSH CACHE firmware bug */
- { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
-
- { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
-
- { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ |
+ { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ |
+ { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ |
+ { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ |
- ATA_HORKAGE_FIRMWARE_WARN },
- { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ |
+ { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
ATA_HORKAGE_FIRMWARE_WARN },
/* Blacklist entries taken from Silicon Image 3124/3132
@@ -4303,12 +4245,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
/* Devices which get the IVB wrong */
{ "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
/* Maybe we should just blacklist TSSTcorp... */
- { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
- { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
- { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
- { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
- { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
- { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
+ { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB, },
/* Devices that do not need bridging limits applied */
{ "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
@@ -4326,29 +4263,73 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ }
};
-static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
+/**
+ * glob_match - match a text string against a glob-style pattern
+ * @text: the string to be examined
+ * @pattern: the glob-style pattern to be matched against
+ *
+ * Either/both of text and pattern can be empty strings.
+ *
+ * Match text against a glob-style pattern, with wildcards and simple sets:
+ *
+ * ? matches any single character.
+ * * matches any run of characters.
+ * [xyz] matches a single character from the set: x, y, or z.
+ * [a-d] matches a single character from the range: a, b, c, or d.
+ * [a-d0-9] matches a single character from either range.
+ *
+ * The special characters ?, [, -, or *, can be matched using a set, eg. [*]
+ * Behaviour with malformed patterns is undefined, though generally reasonable.
+ *
+ * Sample patterns: "SD1?", "SD1[0-5]", "*R0", "SD*1?[012]*xx"
+ *
+ * This function uses one level of recursion per '*' in pattern.
+ * Since it calls _nothing_ else, and has _no_ explicit local variables,
+ * this will not cause stack problems for any reasonable use here.
+ *
+ * RETURNS:
+ * 0 on match, 1 otherwise.
+ */
+static int glob_match (const char *text, const char *pattern)
{
- const char *p;
- int len;
-
- /*
- * check for trailing wildcard: *\0
- */
- p = strchr(patt, wildchar);
- if (p && ((*(p + 1)) == 0))
- len = p - patt;
- else {
- len = strlen(name);
- if (!len) {
- if (!*patt)
- return 0;
- return -1;
+ do {
+ /* Match single character or a '?' wildcard */
+ if (*text == *pattern || *pattern == '?') {
+ if (!*pattern++)
+ return 0; /* End of both strings: match */
+ } else {
+ /* Match single char against a '[' bracketed ']' pattern set */
+ if (!*text || *pattern != '[')
+ break; /* Not a pattern set */
+ while (*++pattern && *pattern != ']' && *text != *pattern) {
+ if (*pattern == '-' && *(pattern - 1) != '[')
+ if (*text > *(pattern - 1) && *text < *(pattern + 1)) {
+ ++pattern;
+ break;
+ }
+ }
+ if (!*pattern || *pattern == ']')
+ return 1; /* No match */
+ while (*pattern && *pattern++ != ']');
+ }
+ } while (*++text && *pattern);
+
+ /* Match any run of chars against a '*' wildcard */
+ if (*pattern == '*') {
+ if (!*++pattern)
+ return 0; /* Match: avoid recursion at end of pattern */
+ /* Loop to handle additional pattern chars after the wildcard */
+ while (*text) {
+ if (glob_match(text, pattern) == 0)
+ return 0; /* Remainder matched */
+ ++text; /* Absorb (match) this char and try again */
}
}
-
- return strncmp(patt, name, len);
+ if (!*text && !*pattern)
+ return 0; /* End of both strings: match */
+ return 1; /* No match */
}
-
+
static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
{
unsigned char model_num[ATA_ID_PROD_LEN + 1];
@@ -4359,10 +4340,10 @@ static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
while (ad->model_num) {
- if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
+ if (!glob_match(model_num, ad->model_num)) {
if (ad->model_rev == NULL)
return ad->horkage;
- if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
+ if (!glob_match(model_rev, ad->model_rev))
return ad->horkage;
}
ad++;
@@ -5611,6 +5592,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
#endif
+ mutex_init(&ap->scsi_scan_mutex);
INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
INIT_LIST_HEAD(&ap->eh_done_q);
@@ -6549,29 +6531,20 @@ static int __init ata_init(void)
ata_parse_force_param();
- ata_aux_wq = create_singlethread_workqueue("ata_aux");
- if (!ata_aux_wq)
- goto fail;
-
rc = ata_sff_init();
- if (rc)
- goto fail;
+ if (rc) {
+ kfree(ata_force_tbl);
+ return rc;
+ }
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
return 0;
-
-fail:
- kfree(ata_force_tbl);
- if (ata_aux_wq)
- destroy_workqueue(ata_aux_wq);
- return rc;
}
static void __exit ata_exit(void)
{
ata_sff_exit();
kfree(ata_force_tbl);
- destroy_workqueue(ata_aux_wq);
}
subsys_initcall(ata_init);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index f77a67303f8b..c9ae299b8342 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -727,7 +727,7 @@ void ata_scsi_error(struct Scsi_Host *host)
if (ap->pflags & ATA_PFLAG_LOADING)
ap->pflags &= ~ATA_PFLAG_LOADING;
else if (ap->pflags & ATA_PFLAG_SCSI_HOTPLUG)
- queue_delayed_work(ata_aux_wq, &ap->hotplug_task, 0);
+ schedule_delayed_work(&ap->hotplug_task, 0);
if (ap->pflags & ATA_PFLAG_RECOVERED)
ata_port_printk(ap, KERN_INFO, "EH complete\n");
@@ -2214,6 +2214,7 @@ const char *ata_get_cmd_descript(u8 command)
{ ATA_CMD_SMART, "SMART" },
{ ATA_CMD_MEDIA_LOCK, "DOOR LOCK" },
{ ATA_CMD_MEDIA_UNLOCK, "DOOR UNLOCK" },
+ { ATA_CMD_DSM, "DATA SET MANAGEMENT" },
{ ATA_CMD_CHK_MED_CRD_TYP, "CHECK MEDIA CARD TYPE" },
{ ATA_CMD_CFA_REQ_EXT_ERR, "CFA REQUEST EXTENDED ERROR" },
{ ATA_CMD_CFA_WRITE_NE, "CFA WRITE SECTORS WITHOUT ERASE" },
@@ -2944,7 +2945,7 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link,
ehc->i.flags |= ATA_EHI_SETMODE;
/* schedule the scsi_rescan_device() here */
- queue_work(ata_aux_wq, &(ap->scsi_rescan_task));
+ schedule_work(&(ap->scsi_rescan_task));
} else if (dev->class == ATA_DEV_UNKNOWN &&
ehc->tries[dev->devno] &&
ata_class_enabled(ehc->classes[dev->devno])) {
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a54273d2c3c6..a89172c100f5 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -1111,10 +1111,10 @@ static void ata_scsi_sdev_config(struct scsi_device *sdev)
*/
static int atapi_drain_needed(struct request *rq)
{
- if (likely(!blk_pc_request(rq)))
+ if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
return 0;
- if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_RW))
+ if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
return 0;
return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
@@ -3435,7 +3435,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
" switching to async\n");
}
- queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
+ queue_delayed_work(system_long_wq, &ap->hotplug_task,
round_jiffies_relative(HZ));
}
@@ -3582,6 +3582,7 @@ void ata_scsi_hotplug(struct work_struct *work)
}
DPRINTK("ENTER\n");
+ mutex_lock(&ap->scsi_scan_mutex);
/* Unplug detached devices. We cannot use link iterator here
* because PMP links have to be scanned even if PMP is
@@ -3595,6 +3596,7 @@ void ata_scsi_hotplug(struct work_struct *work)
/* scan for new ones */
ata_scsi_scan_host(ap, 0);
+ mutex_unlock(&ap->scsi_scan_mutex);
DPRINTK("EXIT\n");
}
@@ -3673,9 +3675,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
* @work: Pointer to ATA port to perform scsi_rescan_device()
*
* After ATA pass thru (SAT) commands are executed successfully,
- * libata need to propagate the changes to SCSI layer. This
- * function must be executed from ata_aux_wq such that sdev
- * attach/detach don't race with rescan.
+ * libata need to propagate the changes to SCSI layer.
*
* LOCKING:
* Kernel thread context (may sleep).
@@ -3688,6 +3688,7 @@ void ata_scsi_dev_rescan(struct work_struct *work)
struct ata_device *dev;
unsigned long flags;
+ mutex_lock(&ap->scsi_scan_mutex);
spin_lock_irqsave(ap->lock, flags);
ata_for_each_link(link, ap, EDGE) {
@@ -3707,6 +3708,7 @@ void ata_scsi_dev_rescan(struct work_struct *work)
}
spin_unlock_irqrestore(ap->lock, flags);
+ mutex_unlock(&ap->scsi_scan_mutex);
}
/**
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index efa4a18cfb9d..674c1436491f 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -3318,14 +3318,7 @@ void ata_sff_port_init(struct ata_port *ap)
int __init ata_sff_init(void)
{
- /*
- * FIXME: In UP case, there is only one workqueue thread and if you
- * have more than one PIO device, latency is bloody awful, with
- * occasional multi-second "hiccups" as one PIO device waits for
- * another. It's an ugly wart that users DO occasionally complain
- * about; luckily most users have at most one PIO polled device.
- */
- ata_sff_wq = create_workqueue("ata_sff");
+ ata_sff_wq = alloc_workqueue("ata_sff", WQ_RESCUER, WQ_MAX_ACTIVE);
if (!ata_sff_wq)
return -ENOMEM;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 4b84ed60324a..9ce1ecc63e39 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -54,7 +54,6 @@ enum {
};
extern unsigned int ata_print_id;
-extern struct workqueue_struct *ata_aux_wq;
extern int atapi_passthru16;
extern int libata_fua;
extern int libata_noacpi;
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 118c28e8abaf..e944aa0c5517 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -34,7 +34,6 @@
#include <linux/ata.h>
#include <linux/libata.h>
-#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
@@ -201,23 +200,25 @@ static int pcmcia_check_one_config(struct pcmcia_device *pdev,
if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
- pdev->io.BasePort1 = io->win[0].base;
- pdev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
- if (!(io->flags & CISTPL_IO_16BIT))
- pdev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+ pdev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
+ pdev->resource[0]->start = io->win[0].base;
+ if (!(io->flags & CISTPL_IO_16BIT)) {
+ pdev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+ pdev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
+ }
if (io->nwin == 2) {
- pdev->io.NumPorts1 = 8;
- pdev->io.BasePort2 = io->win[1].base;
- pdev->io.NumPorts2 = (stk->is_kme) ? 2 : 1;
- if (pcmcia_request_io(pdev, &pdev->io) != 0)
+ pdev->resource[0]->end = 8;
+ pdev->resource[1]->start = io->win[1].base;
+ pdev->resource[1]->end = (stk->is_kme) ? 2 : 1;
+ if (pcmcia_request_io(pdev) != 0)
return -ENODEV;
- stk->ctl_base = pdev->io.BasePort2;
+ stk->ctl_base = pdev->resource[1]->start;
} else if ((io->nwin == 1) && (io->win[0].len >= 16)) {
- pdev->io.NumPorts1 = io->win[0].len;
- pdev->io.NumPorts2 = 0;
- if (pcmcia_request_io(pdev, &pdev->io) != 0)
+ pdev->resource[0]->end = io->win[0].len;
+ pdev->resource[1]->end = 0;
+ if (pcmcia_request_io(pdev) != 0)
return -ENODEV;
- stk->ctl_base = pdev->io.BasePort1 + 0x0e;
+ stk->ctl_base = pdev->resource[0]->start + 0x0e;
} else
return -ENODEV;
/* If we've got this far, we're done */
@@ -246,9 +247,8 @@ static int pcmcia_init_one(struct pcmcia_device *pdev)
struct ata_port_operations *ops = &pcmcia_port_ops;
/* Set up attributes in order to probe card and get resources */
- pdev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
- pdev->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
- pdev->io.IOAddrLines = 3;
+ pdev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
+ pdev->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
pdev->conf.Attributes = CONF_ENABLE_IRQ;
pdev->conf.IntType = INT_MEMORY_AND_IO;
@@ -271,7 +271,7 @@ static int pcmcia_init_one(struct pcmcia_device *pdev)
if (pcmcia_loop_config(pdev, pcmcia_check_one_config, stk))
goto failed; /* No suitable config found */
}
- io_base = pdev->io.BasePort1;
+ io_base = pdev->resource[0]->start;
ctl_base = stk->ctl_base;
if (!pdev->irq)
goto failed;
@@ -294,7 +294,7 @@ static int pcmcia_init_one(struct pcmcia_device *pdev)
/* FIXME: Could be more ports at base + 0x10 but we only deal with
one right now */
- if (pdev->io.NumPorts1 >= 0x20)
+ if (resource_size(pdev->resource[0]) >= 0x20)
n_ports = 2;
if (pdev->manf_id == 0x0097 && pdev->card_id == 0x1620)
diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
new file mode 100644
index 000000000000..1898c6ed4b4e
--- /dev/null
+++ b/drivers/ata/pata_pxa.c
@@ -0,0 +1,411 @@
+/*
+ * Generic PXA PATA driver
+ *
+ * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/ata.h>
+#include <linux/libata.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+
+#include <scsi/scsi_host.h>
+
+#include <mach/pxa2xx-regs.h>
+#include <mach/pata_pxa.h>
+#include <mach/dma.h>
+
+#define DRV_NAME "pata_pxa"
+#define DRV_VERSION "0.1"
+
+struct pata_pxa_data {
+ uint32_t dma_channel;
+ struct pxa_dma_desc *dma_desc;
+ dma_addr_t dma_desc_addr;
+ uint32_t dma_desc_id;
+
+ /* DMA IO physical address */
+ uint32_t dma_io_addr;
+ /* PXA DREQ<0:2> pin selector */
+ uint32_t dma_dreq;
+ /* DMA DCSR register value */
+ uint32_t dma_dcsr;
+
+ struct completion dma_done;
+};
+
+/*
+ * Setup the DMA descriptors. The size is transfer capped at 4k per descriptor,
+ * if the transfer is longer, it is split into multiple chained descriptors.
+ */
+static void pxa_load_dmac(struct scatterlist *sg, struct ata_queued_cmd *qc)
+{
+ struct pata_pxa_data *pd = qc->ap->private_data;
+
+ uint32_t cpu_len, seg_len;
+ dma_addr_t cpu_addr;
+
+ cpu_addr = sg_dma_address(sg);
+ cpu_len = sg_dma_len(sg);
+
+ do {
+ seg_len = (cpu_len > 0x1000) ? 0x1000 : cpu_len;
+
+ pd->dma_desc[pd->dma_desc_id].ddadr = pd->dma_desc_addr +
+ ((pd->dma_desc_id + 1) * sizeof(struct pxa_dma_desc));
+
+ pd->dma_desc[pd->dma_desc_id].dcmd = DCMD_BURST32 |
+ DCMD_WIDTH2 | (DCMD_LENGTH & seg_len);
+
+ if (qc->tf.flags & ATA_TFLAG_WRITE) {
+ pd->dma_desc[pd->dma_desc_id].dsadr = cpu_addr;
+ pd->dma_desc[pd->dma_desc_id].dtadr = pd->dma_io_addr;
+ pd->dma_desc[pd->dma_desc_id].dcmd |= DCMD_INCSRCADDR |
+ DCMD_FLOWTRG;
+ } else {
+ pd->dma_desc[pd->dma_desc_id].dsadr = pd->dma_io_addr;
+ pd->dma_desc[pd->dma_desc_id].dtadr = cpu_addr;
+ pd->dma_desc[pd->dma_desc_id].dcmd |= DCMD_INCTRGADDR |
+ DCMD_FLOWSRC;
+ }
+
+ cpu_len -= seg_len;
+ cpu_addr += seg_len;
+ pd->dma_desc_id++;
+
+ } while (cpu_len);
+
+ /* Should not happen */
+ if (seg_len & 0x1f)
+ DALGN |= (1 << pd->dma_dreq);
+}
+
+/*
+ * Prepare taskfile for submission.
+ */
+static void pxa_qc_prep(struct ata_queued_cmd *qc)
+{
+ struct pata_pxa_data *pd = qc->ap->private_data;
+ int si = 0;
+ struct scatterlist *sg;
+
+ if (!(qc->flags & ATA_QCFLAG_DMAMAP))
+ return;
+
+ pd->dma_desc_id = 0;
+
+ DCSR(pd->dma_channel) = 0;
+ DALGN &= ~(1 << pd->dma_dreq);
+
+ for_each_sg(qc->sg, sg, qc->n_elem, si)
+ pxa_load_dmac(sg, qc);
+
+ pd->dma_desc[pd->dma_desc_id - 1].ddadr = DDADR_STOP;
+
+ /* Fire IRQ only at the end of last block */
+ pd->dma_desc[pd->dma_desc_id - 1].dcmd |= DCMD_ENDIRQEN;
+
+ DDADR(pd->dma_channel) = pd->dma_desc_addr;
+ DRCMR(pd->dma_dreq) = DRCMR_MAPVLD | pd->dma_channel;
+
+}
+
+/*
+ * Configure the DMA controller, load the DMA descriptors, but don't start the
+ * DMA controller yet. Only issue the ATA command.
+ */
+static void pxa_bmdma_setup(struct ata_queued_cmd *qc)
+{
+ qc->ap->ops->sff_exec_command(qc->ap, &qc->tf);
+}
+
+/*
+ * Execute the DMA transfer.
+ */
+static void pxa_bmdma_start(struct ata_queued_cmd *qc)
+{
+ struct pata_pxa_data *pd = qc->ap->private_data;
+ init_completion(&pd->dma_done);
+ DCSR(pd->dma_channel) = DCSR_RUN;
+}
+
+/*
+ * Wait until the DMA transfer completes, then stop the DMA controller.
+ */
+static void pxa_bmdma_stop(struct ata_queued_cmd *qc)
+{
+ struct pata_pxa_data *pd = qc->ap->private_data;
+
+ if ((DCSR(pd->dma_channel) & DCSR_RUN) &&
+ wait_for_completion_timeout(&pd->dma_done, HZ))
+ dev_err(qc->ap->dev, "Timeout waiting for DMA completion!");
+
+ DCSR(pd->dma_channel) = 0;
+}
+
+/*
+ * Read DMA status. The bmdma_stop() will take care of properly finishing the
+ * DMA transfer so we always have DMA-complete interrupt here.
+ */
+static unsigned char pxa_bmdma_status(struct ata_port *ap)
+{
+ struct pata_pxa_data *pd = ap->private_data;
+ unsigned char ret = ATA_DMA_INTR;
+
+ if (pd->dma_dcsr & DCSR_BUSERR)
+ ret |= ATA_DMA_ERR;
+
+ return ret;
+}
+
+/*
+ * No IRQ register present so we do nothing.
+ */
+static void pxa_irq_clear(struct ata_port *ap)
+{
+}
+
+/*
+ * Check for ATAPI DMA. ATAPI DMA is unsupported by this driver. It's still
+ * unclear why ATAPI has DMA issues.
+ */
+static int pxa_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+ return -EOPNOTSUPP;
+}
+
+static struct scsi_host_template pxa_ata_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations pxa_ata_port_ops = {
+ .inherits = &ata_bmdma_port_ops,
+ .cable_detect = ata_cable_40wire,
+
+ .bmdma_setup = pxa_bmdma_setup,
+ .bmdma_start = pxa_bmdma_start,
+ .bmdma_stop = pxa_bmdma_stop,
+ .bmdma_status = pxa_bmdma_status,
+
+ .check_atapi_dma = pxa_check_atapi_dma,
+
+ .sff_irq_clear = pxa_irq_clear,
+
+ .qc_prep = pxa_qc_prep,
+};
+
+/*
+ * DMA interrupt handler.
+ */
+static void pxa_ata_dma_irq(int dma, void *port)
+{
+ struct ata_port *ap = port;
+ struct pata_pxa_data *pd = ap->private_data;
+
+ pd->dma_dcsr = DCSR(dma);
+ DCSR(dma) = pd->dma_dcsr;
+
+ if (pd->dma_dcsr & DCSR_STOPSTATE)
+ complete(&pd->dma_done);
+}
+
+static int __devinit pxa_ata_probe(struct platform_device *pdev)
+{
+ struct ata_host *host;
+ struct ata_port *ap;
+ struct pata_pxa_data *data;
+ struct resource *cmd_res;
+ struct resource *ctl_res;
+ struct resource *dma_res;
+ struct resource *irq_res;
+ struct pata_pxa_pdata *pdata = pdev->dev.platform_data;
+ int ret = 0;
+
+ /*
+ * Resource validation, three resources are needed:
+ * - CMD port base address
+ * - CTL port base address
+ * - DMA port base address
+ * - IRQ pin
+ */
+ if (pdev->num_resources != 4) {
+ dev_err(&pdev->dev, "invalid number of resources\n");
+ return -EINVAL;
+ }
+
+ /*
+ * CMD port base address
+ */
+ cmd_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (unlikely(cmd_res == NULL))
+ return -EINVAL;
+
+ /*
+ * CTL port base address
+ */
+ ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (unlikely(ctl_res == NULL))
+ return -EINVAL;
+
+ /*
+ * DMA port base address
+ */
+ dma_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (unlikely(dma_res == NULL))
+ return -EINVAL;
+
+ /*
+ * IRQ pin
+ */
+ irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (unlikely(irq_res == NULL))
+ return -EINVAL;
+
+ /*
+ * Allocate the host
+ */
+ host = ata_host_alloc(&pdev->dev, 1);
+ if (!host)
+ return -ENOMEM;
+
+ ap = host->ports[0];
+ ap->ops = &pxa_ata_port_ops;
+ ap->pio_mask = ATA_PIO4;
+ ap->mwdma_mask = ATA_MWDMA2;
+ ap->flags = ATA_FLAG_MMIO;
+
+ ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, cmd_res->start,
+ resource_size(cmd_res));
+ ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
+ resource_size(ctl_res));
+ ap->ioaddr.bmdma_addr = devm_ioremap(&pdev->dev, dma_res->start,
+ resource_size(dma_res));
+
+ /*
+ * Adjust register offsets
+ */
+ ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
+ ap->ioaddr.data_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_DATA << pdata->reg_shift);
+ ap->ioaddr.error_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_ERR << pdata->reg_shift);
+ ap->ioaddr.feature_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_FEATURE << pdata->reg_shift);
+ ap->ioaddr.nsect_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_NSECT << pdata->reg_shift);
+ ap->ioaddr.lbal_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_LBAL << pdata->reg_shift);
+ ap->ioaddr.lbam_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_LBAM << pdata->reg_shift);
+ ap->ioaddr.lbah_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_LBAH << pdata->reg_shift);
+ ap->ioaddr.device_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_DEVICE << pdata->reg_shift);
+ ap->ioaddr.status_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_STATUS << pdata->reg_shift);
+ ap->ioaddr.command_addr = ap->ioaddr.cmd_addr +
+ (ATA_REG_CMD << pdata->reg_shift);
+
+ /*
+ * Allocate and load driver's internal data structure
+ */
+ data = devm_kzalloc(&pdev->dev, sizeof(struct pata_pxa_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ ap->private_data = data;
+ data->dma_dreq = pdata->dma_dreq;
+ data->dma_io_addr = dma_res->start;
+
+ /*
+ * Allocate space for the DMA descriptors
+ */
+ data->dma_desc = dmam_alloc_coherent(&pdev->dev, PAGE_SIZE,
+ &data->dma_desc_addr, GFP_KERNEL);
+ if (!data->dma_desc)
+ return -EINVAL;
+
+ /*
+ * Request the DMA channel
+ */
+ data->dma_channel = pxa_request_dma(DRV_NAME, DMA_PRIO_LOW,
+ pxa_ata_dma_irq, ap);
+ if (data->dma_channel < 0)
+ return -EBUSY;
+
+ /*
+ * Stop and clear the DMA channel
+ */
+ DCSR(data->dma_channel) = 0;
+
+ /*
+ * Activate the ATA host
+ */
+ ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
+ pdata->irq_flags, &pxa_ata_sht);
+ if (ret)
+ pxa_free_dma(data->dma_channel);
+
+ return ret;
+}
+
+static int __devexit pxa_ata_remove(struct platform_device *pdev)
+{
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ struct pata_pxa_data *data = host->ports[0]->private_data;
+
+ pxa_free_dma(data->dma_channel);
+
+ ata_host_detach(host);
+
+ return 0;
+}
+
+static struct platform_driver pxa_ata_driver = {
+ .probe = pxa_ata_probe,
+ .remove = __devexit_p(pxa_ata_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init pxa_ata_init(void)
+{
+ return platform_driver_register(&pxa_ata_driver);
+}
+
+static void __exit pxa_ata_exit(void)
+{
+ platform_driver_unregister(&pxa_ata_driver);
+}
+
+module_init(pxa_ata_init);
+module_exit(pxa_ata_exit);
+
+MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
+MODULE_DESCRIPTION("DMA-capable driver for PATA on PXA CPU");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/ata/pata_samsung_cf.c b/drivers/ata/pata_samsung_cf.c
new file mode 100644
index 000000000000..6f9cfb24b751
--- /dev/null
+++ b/drivers/ata/pata_samsung_cf.c
@@ -0,0 +1,683 @@
+/*
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * PATA driver for Samsung SoCs.
+ * Supports CF Interface in True IDE mode. Currently only PIO mode has been
+ * implemented; UDMA support has to be added.
+ *
+ * Based on:
+ * PATA driver for AT91SAM9260 Static Memory Controller
+ * PATA driver for Toshiba SCC controller
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/libata.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <plat/ata.h>
+#include <plat/regs-ata.h>
+
+#define DRV_NAME "pata_samsung_cf"
+#define DRV_VERSION "0.1"
+
+enum s3c_cpu_type {
+ TYPE_S3C64XX,
+ TYPE_S5PC100,
+ TYPE_S5PV210,
+};
+
+/*
+ * struct s3c_ide_info - S3C PATA instance.
+ * @clk: The clock resource for this controller.
+ * @ide_addr: The area mapped for the hardware registers.
+ * @sfr_addr: The area mapped for the special function registers.
+ * @irq: The IRQ number we are using.
+ * @cpu_type: The exact type of this controller.
+ * @fifo_status_reg: The ATA_FIFO_STATUS register offset.
+ */
+struct s3c_ide_info {
+ struct clk *clk;
+ void __iomem *ide_addr;
+ void __iomem *sfr_addr;
+ unsigned int irq;
+ enum s3c_cpu_type cpu_type;
+ unsigned int fifo_status_reg;
+};
+
+static void pata_s3c_set_endian(void __iomem *s3c_ide_regbase, u8 mode)
+{
+ u32 reg = readl(s3c_ide_regbase + S3C_ATA_CFG);
+ reg = mode ? (reg & ~S3C_ATA_CFG_SWAP) : (reg | S3C_ATA_CFG_SWAP);
+ writel(reg, s3c_ide_regbase + S3C_ATA_CFG);
+}
+
+static void pata_s3c_cfg_mode(void __iomem *s3c_ide_sfrbase)
+{
+ /* Select true-ide as the internal operating mode */
+ writel(readl(s3c_ide_sfrbase + S3C_CFATA_MUX) | S3C_CFATA_MUX_TRUEIDE,
+ s3c_ide_sfrbase + S3C_CFATA_MUX);
+}
+
+static unsigned long
+pata_s3c_setup_timing(struct s3c_ide_info *info, const struct ata_timing *ata)
+{
+ int t1 = ata->setup;
+ int t2 = ata->act8b;
+ int t2i = ata->rec8b;
+ ulong piotime;
+
+ piotime = ((t2i & 0xff) << 12) | ((t2 & 0xff) << 4) | (t1 & 0xf);
+
+ return piotime;
+}
+
+static void pata_s3c_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct s3c_ide_info *info = ap->host->private_data;
+ struct ata_timing timing;
+ int cycle_time;
+ ulong ata_cfg = readl(info->ide_addr + S3C_ATA_CFG);
+ ulong piotime;
+
+ /* Enables IORDY if mode requires it */
+ if (ata_pio_need_iordy(adev))
+ ata_cfg |= S3C_ATA_CFG_IORDYEN;
+ else
+ ata_cfg &= ~S3C_ATA_CFG_IORDYEN;
+
+ cycle_time = (int)(1000000000UL / clk_get_rate(info->clk));
+
+ ata_timing_compute(adev, adev->pio_mode, &timing,
+ cycle_time * 1000, 0);
+
+ piotime = pata_s3c_setup_timing(info, &timing);
+
+ writel(ata_cfg, info->ide_addr + S3C_ATA_CFG);
+ writel(piotime, info->ide_addr + S3C_ATA_PIO_TIME);
+}
+
+/*
+ * Waits until the IDE controller is able to perform next read/write
+ * operation to the disk. Needed for 64XX series boards only.
+ */
+static int wait_for_host_ready(struct s3c_ide_info *info)
+{
+ ulong timeout;
+ void __iomem *fifo_reg = info->ide_addr + info->fifo_status_reg;
+
+ /* wait for maximum of 20 msec */
+ timeout = jiffies + msecs_to_jiffies(20);
+ while (time_before(jiffies, timeout)) {
+ if ((readl(fifo_reg) >> 28) == 0)
+ return 0;
+ }
+ return -EBUSY;
+}
+
+/*
+ * Writes to one of the task file registers.
+ */
+static void ata_outb(struct ata_host *host, u8 addr, void __iomem *reg)
+{
+ struct s3c_ide_info *info = host->private_data;
+
+ wait_for_host_ready(info);
+ writeb(addr, reg);
+}
+
+/*
+ * Reads from one of the task file registers.
+ */
+static u8 ata_inb(struct ata_host *host, void __iomem *reg)
+{
+ struct s3c_ide_info *info = host->private_data;
+ u8 temp;
+
+ wait_for_host_ready(info);
+ (void) readb(reg);
+ wait_for_host_ready(info);
+ temp = readb(info->ide_addr + S3C_ATA_PIO_RDATA);
+ return temp;
+}
+
+/*
+ * pata_s3c_tf_load - send taskfile registers to host controller
+ */
+static void pata_s3c_tf_load(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
+
+ if (tf->ctl != ap->last_ctl) {
+ ata_outb(ap->host, tf->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = tf->ctl;
+ ata_wait_idle(ap);
+ }
+
+ if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
+ ata_outb(ap->host, tf->hob_feature, ioaddr->feature_addr);
+ ata_outb(ap->host, tf->hob_nsect, ioaddr->nsect_addr);
+ ata_outb(ap->host, tf->hob_lbal, ioaddr->lbal_addr);
+ ata_outb(ap->host, tf->hob_lbam, ioaddr->lbam_addr);
+ ata_outb(ap->host, tf->hob_lbah, ioaddr->lbah_addr);
+ }
+
+ if (is_addr) {
+ ata_outb(ap->host, tf->feature, ioaddr->feature_addr);
+ ata_outb(ap->host, tf->nsect, ioaddr->nsect_addr);
+ ata_outb(ap->host, tf->lbal, ioaddr->lbal_addr);
+ ata_outb(ap->host, tf->lbam, ioaddr->lbam_addr);
+ ata_outb(ap->host, tf->lbah, ioaddr->lbah_addr);
+ }
+
+ if (tf->flags & ATA_TFLAG_DEVICE)
+ ata_outb(ap->host, tf->device, ioaddr->device_addr);
+
+ ata_wait_idle(ap);
+}
+
+/*
+ * pata_s3c_tf_read - input device's ATA taskfile shadow registers
+ */
+static void pata_s3c_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+
+ tf->feature = ata_inb(ap->host, ioaddr->error_addr);
+ tf->nsect = ata_inb(ap->host, ioaddr->nsect_addr);
+ tf->lbal = ata_inb(ap->host, ioaddr->lbal_addr);
+ tf->lbam = ata_inb(ap->host, ioaddr->lbam_addr);
+ tf->lbah = ata_inb(ap->host, ioaddr->lbah_addr);
+ tf->device = ata_inb(ap->host, ioaddr->device_addr);
+
+ if (tf->flags & ATA_TFLAG_LBA48) {
+ ata_outb(ap->host, tf->ctl | ATA_HOB, ioaddr->ctl_addr);
+ tf->hob_feature = ata_inb(ap->host, ioaddr->error_addr);
+ tf->hob_nsect = ata_inb(ap->host, ioaddr->nsect_addr);
+ tf->hob_lbal = ata_inb(ap->host, ioaddr->lbal_addr);
+ tf->hob_lbam = ata_inb(ap->host, ioaddr->lbam_addr);
+ tf->hob_lbah = ata_inb(ap->host, ioaddr->lbah_addr);
+ ata_outb(ap->host, tf->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = tf->ctl;
+ }
+}
+
+/*
+ * pata_s3c_exec_command - issue ATA command to host controller
+ */
+static void pata_s3c_exec_command(struct ata_port *ap,
+ const struct ata_taskfile *tf)
+{
+ ata_outb(ap->host, tf->command, ap->ioaddr.command_addr);
+ ata_sff_pause(ap);
+}
+
+/*
+ * pata_s3c_check_status - Read device status register
+ */
+static u8 pata_s3c_check_status(struct ata_port *ap)
+{
+ return ata_inb(ap->host, ap->ioaddr.status_addr);
+}
+
+/*
+ * pata_s3c_check_altstatus - Read alternate device status register
+ */
+static u8 pata_s3c_check_altstatus(struct ata_port *ap)
+{
+ return ata_inb(ap->host, ap->ioaddr.altstatus_addr);
+}
+
+/*
+ * pata_s3c_data_xfer - Transfer data by PIO
+ */
+unsigned int pata_s3c_data_xfer(struct ata_device *dev, unsigned char *buf,
+ unsigned int buflen, int rw)
+{
+ struct ata_port *ap = dev->link->ap;
+ struct s3c_ide_info *info = ap->host->private_data;
+ void __iomem *data_addr = ap->ioaddr.data_addr;
+ unsigned int words = buflen >> 1, i;
+ u16 *data_ptr = (u16 *)buf;
+
+ /* Requires wait same as in ata_inb/ata_outb */
+ if (rw == READ)
+ for (i = 0; i < words; i++, data_ptr++) {
+ wait_for_host_ready(info);
+ (void) readw(data_addr);
+ wait_for_host_ready(info);
+ *data_ptr = readw(info->ide_addr
+ + S3C_ATA_PIO_RDATA);
+ }
+ else
+ for (i = 0; i < words; i++, data_ptr++) {
+ wait_for_host_ready(info);
+ writew(*data_ptr, data_addr);
+ }
+
+ if (buflen & 0x01)
+ dev_err(ap->dev, "unexpected trailing data\n");
+
+ return words << 1;
+}
+
+/*
+ * pata_s3c_dev_select - Select device on ATA bus
+ */
+static void pata_s3c_dev_select(struct ata_port *ap, unsigned int device)
+{
+ u8 tmp = ATA_DEVICE_OBS;
+
+ if (device != 0)
+ tmp |= ATA_DEV1;
+
+ ata_outb(ap->host, tmp, ap->ioaddr.device_addr);
+ ata_sff_pause(ap);
+}
+
+/*
+ * pata_s3c_devchk - PATA device presence detection
+ */
+static unsigned int pata_s3c_devchk(struct ata_port *ap,
+ unsigned int device)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+ u8 nsect, lbal;
+
+ pata_s3c_dev_select(ap, device);
+
+ ata_outb(ap->host, 0x55, ioaddr->nsect_addr);
+ ata_outb(ap->host, 0xaa, ioaddr->lbal_addr);
+
+ ata_outb(ap->host, 0xaa, ioaddr->nsect_addr);
+ ata_outb(ap->host, 0x55, ioaddr->lbal_addr);
+
+ ata_outb(ap->host, 0x55, ioaddr->nsect_addr);
+ ata_outb(ap->host, 0xaa, ioaddr->lbal_addr);
+
+ nsect = ata_inb(ap->host, ioaddr->nsect_addr);
+ lbal = ata_inb(ap->host, ioaddr->lbal_addr);
+
+ if ((nsect == 0x55) && (lbal == 0xaa))
+ return 1; /* we found a device */
+
+ return 0; /* nothing found */
+}
+
+/*
+ * pata_s3c_wait_after_reset - wait for devices to become ready after reset
+ */
+static int pata_s3c_wait_after_reset(struct ata_link *link,
+ unsigned long deadline)
+{
+ int rc;
+
+ msleep(ATA_WAIT_AFTER_RESET);
+
+ /* always check readiness of the master device */
+ rc = ata_sff_wait_ready(link, deadline);
+ /* -ENODEV means the odd clown forgot the D7 pulldown resistor
+ * and TF status is 0xff, bail out on it too.
+ */
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+/*
+ * pata_s3c_bus_softreset - PATA device software reset
+ */
+static unsigned int pata_s3c_bus_softreset(struct ata_port *ap,
+ unsigned long deadline)
+{
+ struct ata_ioports *ioaddr = &ap->ioaddr;
+
+ /* software reset. causes dev0 to be selected */
+ ata_outb(ap->host, ap->ctl, ioaddr->ctl_addr);
+ udelay(20);
+ ata_outb(ap->host, ap->ctl | ATA_SRST, ioaddr->ctl_addr);
+ udelay(20);
+ ata_outb(ap->host, ap->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = ap->ctl;
+
+ return pata_s3c_wait_after_reset(&ap->link, deadline);
+}
+
+/*
+ * pata_s3c_softreset - reset host port via ATA SRST
+ */
+static int pata_s3c_softreset(struct ata_link *link, unsigned int *classes,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ unsigned int devmask = 0;
+ int rc;
+ u8 err;
+
+ /* determine if device 0 is present */
+ if (pata_s3c_devchk(ap, 0))
+ devmask |= (1 << 0);
+
+ /* select device 0 again */
+ pata_s3c_dev_select(ap, 0);
+
+ /* issue bus reset */
+ rc = pata_s3c_bus_softreset(ap, deadline);
+ /* if link is occupied, -ENODEV too is an error */
+ if (rc && rc != -ENODEV) {
+ ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc);
+ return rc;
+ }
+
+ /* determine by signature whether we have ATA or ATAPI devices */
+ classes[0] = ata_sff_dev_classify(&ap->link.device[0],
+ devmask & (1 << 0), &err);
+
+ return 0;
+}
+
+/*
+ * pata_s3c_set_devctl - Write device control register
+ */
+static void pata_s3c_set_devctl(struct ata_port *ap, u8 ctl)
+{
+ ata_outb(ap->host, ctl, ap->ioaddr.ctl_addr);
+}
+
+static struct scsi_host_template pata_s3c_sht = {
+ ATA_PIO_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations pata_s3c_port_ops = {
+ .inherits = &ata_sff_port_ops,
+ .sff_check_status = pata_s3c_check_status,
+ .sff_check_altstatus = pata_s3c_check_altstatus,
+ .sff_tf_load = pata_s3c_tf_load,
+ .sff_tf_read = pata_s3c_tf_read,
+ .sff_data_xfer = pata_s3c_data_xfer,
+ .sff_exec_command = pata_s3c_exec_command,
+ .sff_dev_select = pata_s3c_dev_select,
+ .sff_set_devctl = pata_s3c_set_devctl,
+ .softreset = pata_s3c_softreset,
+ .set_piomode = pata_s3c_set_piomode,
+};
+
+static struct ata_port_operations pata_s5p_port_ops = {
+ .inherits = &ata_sff_port_ops,
+ .set_piomode = pata_s3c_set_piomode,
+};
+
+static void pata_s3c_enable(void *s3c_ide_regbase, bool state)
+{
+ u32 temp = readl(s3c_ide_regbase + S3C_ATA_CTRL);
+ temp = state ? (temp | 1) : (temp & ~1);
+ writel(temp, s3c_ide_regbase + S3C_ATA_CTRL);
+}
+
+static irqreturn_t pata_s3c_irq(int irq, void *dev_instance)
+{
+ struct ata_host *host = dev_instance;
+ struct s3c_ide_info *info = host->private_data;
+ u32 reg;
+
+ reg = readl(info->ide_addr + S3C_ATA_IRQ);
+ writel(reg, info->ide_addr + S3C_ATA_IRQ);
+
+ return ata_sff_interrupt(irq, dev_instance);
+}
+
+static void pata_s3c_hwinit(struct s3c_ide_info *info,
+ struct s3c_ide_platdata *pdata)
+{
+ switch (info->cpu_type) {
+ case TYPE_S3C64XX:
+ /* Configure as big endian */
+ pata_s3c_cfg_mode(info->sfr_addr);
+ pata_s3c_set_endian(info->ide_addr, 1);
+ pata_s3c_enable(info->ide_addr, true);
+ msleep(100);
+
+ /* Remove IRQ Status */
+ writel(0x1f, info->ide_addr + S3C_ATA_IRQ);
+ writel(0x1b, info->ide_addr + S3C_ATA_IRQ_MSK);
+ break;
+
+ case TYPE_S5PC100:
+ pata_s3c_cfg_mode(info->sfr_addr);
+ /* FALLTHROUGH */
+
+ case TYPE_S5PV210:
+ /* Configure as little endian */
+ pata_s3c_set_endian(info->ide_addr, 0);
+ pata_s3c_enable(info->ide_addr, true);
+ msleep(100);
+
+ /* Remove IRQ Status */
+ writel(0x3f, info->ide_addr + S3C_ATA_IRQ);
+ writel(0x3f, info->ide_addr + S3C_ATA_IRQ_MSK);
+ break;
+
+ default:
+ BUG();
+ }
+}
+
+static int __init pata_s3c_probe(struct platform_device *pdev)
+{
+ struct s3c_ide_platdata *pdata = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct s3c_ide_info *info;
+ struct resource *res;
+ struct ata_port *ap;
+ struct ata_host *host;
+ enum s3c_cpu_type cpu_type;
+ int ret;
+
+ cpu_type = platform_get_device_id(pdev)->driver_data;
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ dev_err(dev, "failed to allocate memory for device data\n");
+ return -ENOMEM;
+ }
+
+ info->irq = platform_get_irq(pdev, 0);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(dev, "failed to get mem resource\n");
+ return -EINVAL;
+ }
+
+ if (!devm_request_mem_region(dev, res->start,
+ resource_size(res), DRV_NAME)) {
+ dev_err(dev, "error requesting register region\n");
+ return -EBUSY;
+ }
+
+ info->ide_addr = devm_ioremap(dev, res->start, resource_size(res));
+ if (!info->ide_addr) {
+ dev_err(dev, "failed to map IO base address\n");
+ return -ENOMEM;
+ }
+
+ info->clk = clk_get(&pdev->dev, "cfcon");
+ if (IS_ERR(info->clk)) {
+ dev_err(dev, "failed to get access to cf controller clock\n");
+ ret = PTR_ERR(info->clk);
+ info->clk = NULL;
+ return ret;
+ }
+
+ clk_enable(info->clk);
+
+ /* init ata host */
+ host = ata_host_alloc(dev, 1);
+ if (!host) {
+ dev_err(dev, "failed to allocate ide host\n");
+ ret = -ENOMEM;
+ goto stop_clk;
+ }
+
+ ap = host->ports[0];
+ ap->flags |= ATA_FLAG_MMIO;
+ ap->pio_mask = ATA_PIO4;
+
+ if (cpu_type == TYPE_S3C64XX) {
+ ap->ops = &pata_s3c_port_ops;
+ info->sfr_addr = info->ide_addr + 0x1800;
+ info->ide_addr += 0x1900;
+ info->fifo_status_reg = 0x94;
+ } else if (cpu_type == TYPE_S5PC100) {
+ ap->ops = &pata_s5p_port_ops;
+ info->sfr_addr = info->ide_addr + 0x1800;
+ info->ide_addr += 0x1900;
+ info->fifo_status_reg = 0x84;
+ } else {
+ ap->ops = &pata_s5p_port_ops;
+ info->fifo_status_reg = 0x84;
+ }
+
+ info->cpu_type = cpu_type;
+
+ if (info->irq <= 0) {
+ ap->flags |= ATA_FLAG_PIO_POLLING;
+ info->irq = 0;
+ ata_port_desc(ap, "no IRQ, using PIO polling\n");
+ }
+
+ ap->ioaddr.cmd_addr = info->ide_addr + S3C_ATA_CMD;
+ ap->ioaddr.data_addr = info->ide_addr + S3C_ATA_PIO_DTR;
+ ap->ioaddr.error_addr = info->ide_addr + S3C_ATA_PIO_FED;
+ ap->ioaddr.feature_addr = info->ide_addr + S3C_ATA_PIO_FED;
+ ap->ioaddr.nsect_addr = info->ide_addr + S3C_ATA_PIO_SCR;
+ ap->ioaddr.lbal_addr = info->ide_addr + S3C_ATA_PIO_LLR;
+ ap->ioaddr.lbam_addr = info->ide_addr + S3C_ATA_PIO_LMR;
+ ap->ioaddr.lbah_addr = info->ide_addr + S3C_ATA_PIO_LHR;
+ ap->ioaddr.device_addr = info->ide_addr + S3C_ATA_PIO_DVR;
+ ap->ioaddr.status_addr = info->ide_addr + S3C_ATA_PIO_CSD;
+ ap->ioaddr.command_addr = info->ide_addr + S3C_ATA_PIO_CSD;
+ ap->ioaddr.altstatus_addr = info->ide_addr + S3C_ATA_PIO_DAD;
+ ap->ioaddr.ctl_addr = info->ide_addr + S3C_ATA_PIO_DAD;
+
+ ata_port_desc(ap, "mmio cmd 0x%llx ",
+ (unsigned long long)res->start);
+
+ host->private_data = info;
+
+ if (pdata && pdata->setup_gpio)
+ pdata->setup_gpio();
+
+ /* Set endianness and enable the interface */
+ pata_s3c_hwinit(info, pdata);
+
+ platform_set_drvdata(pdev, host);
+
+ return ata_host_activate(host, info->irq,
+ info->irq ? pata_s3c_irq : NULL,
+ 0, &pata_s3c_sht);
+
+stop_clk:
+ clk_disable(info->clk);
+ clk_put(info->clk);
+ return ret;
+}
+
+static int __exit pata_s3c_remove(struct platform_device *pdev)
+{
+ struct ata_host *host = platform_get_drvdata(pdev);
+ struct s3c_ide_info *info = host->private_data;
+
+ ata_host_detach(host);
+
+ clk_disable(info->clk);
+ clk_put(info->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int pata_s3c_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct ata_host *host = platform_get_drvdata(pdev);
+
+ return ata_host_suspend(host, PMSG_SUSPEND);
+}
+
+static int pata_s3c_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct ata_host *host = platform_get_drvdata(pdev);
+ struct s3c_ide_platdata *pdata = pdev->dev.platform_data;
+ struct s3c_ide_info *info = host->private_data;
+
+ pata_s3c_hwinit(info, pdata);
+ ata_host_resume(host);
+
+ return 0;
+}
+
+static const struct dev_pm_ops pata_s3c_pm_ops = {
+ .suspend = pata_s3c_suspend,
+ .resume = pata_s3c_resume,
+};
+#endif
+
+/* driver device registration */
+static struct platform_device_id pata_s3c_driver_ids[] = {
+ {
+ .name = "s3c64xx-pata",
+ .driver_data = TYPE_S3C64XX,
+ }, {
+ .name = "s5pc100-pata",
+ .driver_data = TYPE_S5PC100,
+ }, {
+ .name = "s5pv210-pata",
+ .driver_data = TYPE_S5PV210,
+ },
+ { }
+};
+
+MODULE_DEVICE_TABLE(platform, pata_s3c_driver_ids);
+
+static struct platform_driver pata_s3c_driver = {
+ .remove = __exit_p(pata_s3c_remove),
+ .id_table = pata_s3c_driver_ids,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &pata_s3c_pm_ops,
+#endif
+ },
+};
+
+static int __init pata_s3c_init(void)
+{
+ return platform_driver_probe(&pata_s3c_driver, pata_s3c_probe);
+}
+
+static void __exit pata_s3c_exit(void)
+{
+ platform_driver_unregister(&pata_s3c_driver);
+}
+
+module_init(pata_s3c_init);
+module_exit(pata_s3c_exit);
+
+MODULE_AUTHOR("Abhilash Kesavan, <a.kesavan@samsung.com>");
+MODULE_DESCRIPTION("low-level driver for Samsung PATA controller");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index d9db3f8d60ef..fe36966f7e34 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -168,8 +168,7 @@ static const unsigned long JCACTSELtbl[2][7] = {
};
static const struct pci_device_id scc_pci_tbl[] = {
- {PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA), 0},
{ } /* terminate list */
};
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
new file mode 100644
index 000000000000..ea24c1e51be2
--- /dev/null
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -0,0 +1,1756 @@
+/*
+ * drivers/ata/sata_dwc_460ex.c
+ *
+ * Synopsys DesignWare Cores (DWC) SATA host driver
+ *
+ * Author: Mark Miesfeld <mmiesfeld@amcc.com>
+ *
+ * Ported from 2.6.19.2 to 2.6.25/26 by Stefan Roese <sr@denx.de>
+ * Copyright 2008 DENX Software Engineering
+ *
+ * Based on versions provided by AMCC and Synopsys which are:
+ * Copyright 2006 Applied Micro Circuits Corporation
+ * COPYRIGHT (C) 2005 SYNOPSYS, INC. ALL RIGHTS RESERVED
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifdef CONFIG_SATA_DWC_DEBUG
+#define DEBUG
+#endif
+
+#ifdef CONFIG_SATA_DWC_VDEBUG
+#define VERBOSE_DEBUG
+#define DEBUG_NCQ
+#endif
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/libata.h>
+#include <linux/slab.h>
+#include "libata.h"
+
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+
+#define DRV_NAME "sata-dwc"
+#define DRV_VERSION "1.0"
+
+/* SATA DMA driver Globals */
+#define DMA_NUM_CHANS 1
+#define DMA_NUM_CHAN_REGS 8
+
+/* SATA DMA Register definitions */
+#define AHB_DMA_BRST_DFLT 64 /* 16 data items burst length*/
+
+struct dmareg {
+ u32 low; /* Low bits 0-31 */
+ u32 high; /* High bits 32-63 */
+};
+
+/* DMA Per Channel registers */
+struct dma_chan_regs {
+ struct dmareg sar; /* Source Address */
+ struct dmareg dar; /* Destination address */
+ struct dmareg llp; /* Linked List Pointer */
+ struct dmareg ctl; /* Control */
+ struct dmareg sstat; /* Source Status not implemented in core */
+ struct dmareg dstat; /* Destination Status not implemented in core*/
+ struct dmareg sstatar; /* Source Status Address not impl in core */
+ struct dmareg dstatar; /* Destination Status Address not implemente */
+ struct dmareg cfg; /* Config */
+ struct dmareg sgr; /* Source Gather */
+ struct dmareg dsr; /* Destination Scatter */
+};
+
+/* Generic Interrupt Registers */
+struct dma_interrupt_regs {
+ struct dmareg tfr; /* Transfer Interrupt */
+ struct dmareg block; /* Block Interrupt */
+ struct dmareg srctran; /* Source Transfer Interrupt */
+ struct dmareg dsttran; /* Dest Transfer Interrupt */
+ struct dmareg error; /* Error */
+};
+
+struct ahb_dma_regs {
+ struct dma_chan_regs chan_regs[DMA_NUM_CHAN_REGS];
+ struct dma_interrupt_regs interrupt_raw; /* Raw Interrupt */
+ struct dma_interrupt_regs interrupt_status; /* Interrupt Status */
+ struct dma_interrupt_regs interrupt_mask; /* Interrupt Mask */
+ struct dma_interrupt_regs interrupt_clear; /* Interrupt Clear */
+ struct dmareg statusInt; /* Interrupt combined*/
+ struct dmareg rq_srcreg; /* Src Trans Req */
+ struct dmareg rq_dstreg; /* Dst Trans Req */
+ struct dmareg rq_sgl_srcreg; /* Sngl Src Trans Req*/
+ struct dmareg rq_sgl_dstreg; /* Sngl Dst Trans Req*/
+ struct dmareg rq_lst_srcreg; /* Last Src Trans Req*/
+ struct dmareg rq_lst_dstreg; /* Last Dst Trans Req*/
+ struct dmareg dma_cfg; /* DMA Config */
+ struct dmareg dma_chan_en; /* DMA Channel Enable*/
+ struct dmareg dma_id; /* DMA ID */
+ struct dmareg dma_test; /* DMA Test */
+ struct dmareg res1; /* reserved */
+ struct dmareg res2; /* reserved */
+ /*
+ * DMA Comp Params
+ * Param 6 = dma_param[0], Param 5 = dma_param[1],
+ * Param 4 = dma_param[2] ...
+ */
+ struct dmareg dma_params[6];
+};
+
+/* Data structure for linked list item */
+struct lli {
+ u32 sar; /* Source Address */
+ u32 dar; /* Destination address */
+ u32 llp; /* Linked List Pointer */
+ struct dmareg ctl; /* Control */
+ struct dmareg dstat; /* Destination Status */
+};
+
+enum {
+ SATA_DWC_DMAC_LLI_SZ = (sizeof(struct lli)),
+ SATA_DWC_DMAC_LLI_NUM = 256,
+ SATA_DWC_DMAC_LLI_TBL_SZ = (SATA_DWC_DMAC_LLI_SZ * \
+ SATA_DWC_DMAC_LLI_NUM),
+ SATA_DWC_DMAC_TWIDTH_BYTES = 4,
+ SATA_DWC_DMAC_CTRL_TSIZE_MAX = (0x00000800 * \
+ SATA_DWC_DMAC_TWIDTH_BYTES),
+};
+
+/* DMA Register Operation Bits */
+enum {
+ DMA_EN = 0x00000001, /* Enable AHB DMA */
+ DMA_CTL_LLP_SRCEN = 0x10000000, /* Blk chain enable Src */
+ DMA_CTL_LLP_DSTEN = 0x08000000, /* Blk chain enable Dst */
+};
+
+#define DMA_CTL_BLK_TS(size) ((size) & 0x000000FFF) /* Blk Transfer size */
+#define DMA_CHANNEL(ch) (0x00000001 << (ch)) /* Select channel */
+ /* Enable channel */
+#define DMA_ENABLE_CHAN(ch) ((0x00000001 << (ch)) | \
+ ((0x000000001 << (ch)) << 8))
+ /* Disable channel */
+#define DMA_DISABLE_CHAN(ch) (0x00000000 | ((0x000000001 << (ch)) << 8))
+ /* Transfer Type & Flow Controller */
+#define DMA_CTL_TTFC(type) (((type) & 0x7) << 20)
+#define DMA_CTL_SMS(num) (((num) & 0x3) << 25) /* Src Master Select */
+#define DMA_CTL_DMS(num) (((num) & 0x3) << 23)/* Dst Master Select */
+ /* Src Burst Transaction Length */
+#define DMA_CTL_SRC_MSIZE(size) (((size) & 0x7) << 14)
+ /* Dst Burst Transaction Length */
+#define DMA_CTL_DST_MSIZE(size) (((size) & 0x7) << 11)
+ /* Source Transfer Width */
+#define DMA_CTL_SRC_TRWID(size) (((size) & 0x7) << 4)
+ /* Destination Transfer Width */
+#define DMA_CTL_DST_TRWID(size) (((size) & 0x7) << 1)
+
+/* Assign HW handshaking interface (x) to destination / source peripheral */
+#define DMA_CFG_HW_HS_DEST(int_num) (((int_num) & 0xF) << 11)
+#define DMA_CFG_HW_HS_SRC(int_num) (((int_num) & 0xF) << 7)
+#define DMA_LLP_LMS(addr, master) (((addr) & 0xfffffffc) | (master))
+
+/*
+ * This define is used to set block chaining disabled in the control low
+ * register. It is already in little endian format so it can be &'d dirctly.
+ * It is essentially: cpu_to_le32(~(DMA_CTL_LLP_SRCEN | DMA_CTL_LLP_DSTEN))
+ */
+enum {
+ DMA_CTL_LLP_DISABLE_LE32 = 0xffffffe7,
+ DMA_CTL_TTFC_P2M_DMAC = 0x00000002, /* Per to mem, DMAC cntr */
+ DMA_CTL_TTFC_M2P_PER = 0x00000003, /* Mem to per, peripheral cntr */
+ DMA_CTL_SINC_INC = 0x00000000, /* Source Address Increment */
+ DMA_CTL_SINC_DEC = 0x00000200,
+ DMA_CTL_SINC_NOCHANGE = 0x00000400,
+ DMA_CTL_DINC_INC = 0x00000000, /* Destination Address Increment */
+ DMA_CTL_DINC_DEC = 0x00000080,
+ DMA_CTL_DINC_NOCHANGE = 0x00000100,
+ DMA_CTL_INT_EN = 0x00000001, /* Interrupt Enable */
+
+/* Channel Configuration Register high bits */
+ DMA_CFG_FCMOD_REQ = 0x00000001, /* Flow Control - request based */
+ DMA_CFG_PROTCTL = (0x00000003 << 2),/* Protection Control */
+
+/* Channel Configuration Register low bits */
+ DMA_CFG_RELD_DST = 0x80000000, /* Reload Dest / Src Addr */
+ DMA_CFG_RELD_SRC = 0x40000000,
+ DMA_CFG_HS_SELSRC = 0x00000800, /* Software handshake Src/ Dest */
+ DMA_CFG_HS_SELDST = 0x00000400,
+ DMA_CFG_FIFOEMPTY = (0x00000001 << 9), /* FIFO Empty bit */
+
+/* Channel Linked List Pointer Register */
+ DMA_LLP_AHBMASTER1 = 0, /* List Master Select */
+ DMA_LLP_AHBMASTER2 = 1,
+
+ SATA_DWC_MAX_PORTS = 1,
+
+ SATA_DWC_SCR_OFFSET = 0x24,
+ SATA_DWC_REG_OFFSET = 0x64,
+};
+
+/* DWC SATA Registers */
+struct sata_dwc_regs {
+ u32 fptagr; /* 1st party DMA tag */
+ u32 fpbor; /* 1st party DMA buffer offset */
+ u32 fptcr; /* 1st party DMA Xfr count */
+ u32 dmacr; /* DMA Control */
+ u32 dbtsr; /* DMA Burst Transac size */
+ u32 intpr; /* Interrupt Pending */
+ u32 intmr; /* Interrupt Mask */
+ u32 errmr; /* Error Mask */
+ u32 llcr; /* Link Layer Control */
+ u32 phycr; /* PHY Control */
+ u32 physr; /* PHY Status */
+ u32 rxbistpd; /* Recvd BIST pattern def register */
+ u32 rxbistpd1; /* Recvd BIST data dword1 */
+ u32 rxbistpd2; /* Recvd BIST pattern data dword2 */
+ u32 txbistpd; /* Trans BIST pattern def register */
+ u32 txbistpd1; /* Trans BIST data dword1 */
+ u32 txbistpd2; /* Trans BIST data dword2 */
+ u32 bistcr; /* BIST Control Register */
+ u32 bistfctr; /* BIST FIS Count Register */
+ u32 bistsr; /* BIST Status Register */
+ u32 bistdecr; /* BIST Dword Error count register */
+ u32 res[15]; /* Reserved locations */
+ u32 testr; /* Test Register */
+ u32 versionr; /* Version Register */
+ u32 idr; /* ID Register */
+ u32 unimpl[192]; /* Unimplemented */
+ u32 dmadr[256]; /* FIFO Locations in DMA Mode */
+};
+
+enum {
+ SCR_SCONTROL_DET_ENABLE = 0x00000001,
+ SCR_SSTATUS_DET_PRESENT = 0x00000001,
+ SCR_SERROR_DIAG_X = 0x04000000,
+/* DWC SATA Register Operations */
+ SATA_DWC_TXFIFO_DEPTH = 0x01FF,
+ SATA_DWC_RXFIFO_DEPTH = 0x01FF,
+ SATA_DWC_DMACR_TMOD_TXCHEN = 0x00000004,
+ SATA_DWC_DMACR_TXCHEN = (0x00000001 | SATA_DWC_DMACR_TMOD_TXCHEN),
+ SATA_DWC_DMACR_RXCHEN = (0x00000002 | SATA_DWC_DMACR_TMOD_TXCHEN),
+ SATA_DWC_DMACR_TXRXCH_CLEAR = SATA_DWC_DMACR_TMOD_TXCHEN,
+ SATA_DWC_INTPR_DMAT = 0x00000001,
+ SATA_DWC_INTPR_NEWFP = 0x00000002,
+ SATA_DWC_INTPR_PMABRT = 0x00000004,
+ SATA_DWC_INTPR_ERR = 0x00000008,
+ SATA_DWC_INTPR_NEWBIST = 0x00000010,
+ SATA_DWC_INTPR_IPF = 0x10000000,
+ SATA_DWC_INTMR_DMATM = 0x00000001,
+ SATA_DWC_INTMR_NEWFPM = 0x00000002,
+ SATA_DWC_INTMR_PMABRTM = 0x00000004,
+ SATA_DWC_INTMR_ERRM = 0x00000008,
+ SATA_DWC_INTMR_NEWBISTM = 0x00000010,
+ SATA_DWC_LLCR_SCRAMEN = 0x00000001,
+ SATA_DWC_LLCR_DESCRAMEN = 0x00000002,
+ SATA_DWC_LLCR_RPDEN = 0x00000004,
+/* This is all error bits, zero's are reserved fields. */
+ SATA_DWC_SERROR_ERR_BITS = 0x0FFF0F03
+};
+
+#define SATA_DWC_SCR0_SPD_GET(v) (((v) >> 4) & 0x0000000F)
+#define SATA_DWC_DMACR_TX_CLEAR(v) (((v) & ~SATA_DWC_DMACR_TXCHEN) |\
+ SATA_DWC_DMACR_TMOD_TXCHEN)
+#define SATA_DWC_DMACR_RX_CLEAR(v) (((v) & ~SATA_DWC_DMACR_RXCHEN) |\
+ SATA_DWC_DMACR_TMOD_TXCHEN)
+#define SATA_DWC_DBTSR_MWR(size) (((size)/4) & SATA_DWC_TXFIFO_DEPTH)
+#define SATA_DWC_DBTSR_MRD(size) ((((size)/4) & SATA_DWC_RXFIFO_DEPTH)\
+ << 16)
+struct sata_dwc_device {
+ struct device *dev; /* generic device struct */
+ struct ata_probe_ent *pe; /* ptr to probe-ent */
+ struct ata_host *host;
+ u8 *reg_base;
+ struct sata_dwc_regs *sata_dwc_regs; /* DW Synopsys SATA specific */
+ int irq_dma;
+};
+
+#define SATA_DWC_QCMD_MAX 32
+
+struct sata_dwc_device_port {
+ struct sata_dwc_device *hsdev;
+ int cmd_issued[SATA_DWC_QCMD_MAX];
+ struct lli *llit[SATA_DWC_QCMD_MAX]; /* DMA LLI table */
+ dma_addr_t llit_dma[SATA_DWC_QCMD_MAX];
+ u32 dma_chan[SATA_DWC_QCMD_MAX];
+ int dma_pending[SATA_DWC_QCMD_MAX];
+};
+
+/*
+ * Commonly used DWC SATA driver Macros
+ */
+#define HSDEV_FROM_HOST(host) ((struct sata_dwc_device *)\
+ (host)->private_data)
+#define HSDEV_FROM_AP(ap) ((struct sata_dwc_device *)\
+ (ap)->host->private_data)
+#define HSDEVP_FROM_AP(ap) ((struct sata_dwc_device_port *)\
+ (ap)->private_data)
+#define HSDEV_FROM_QC(qc) ((struct sata_dwc_device *)\
+ (qc)->ap->host->private_data)
+#define HSDEV_FROM_HSDEVP(p) ((struct sata_dwc_device *)\
+ (hsdevp)->hsdev)
+
+enum {
+ SATA_DWC_CMD_ISSUED_NOT = 0,
+ SATA_DWC_CMD_ISSUED_PEND = 1,
+ SATA_DWC_CMD_ISSUED_EXEC = 2,
+ SATA_DWC_CMD_ISSUED_NODATA = 3,
+
+ SATA_DWC_DMA_PENDING_NONE = 0,
+ SATA_DWC_DMA_PENDING_TX = 1,
+ SATA_DWC_DMA_PENDING_RX = 2,
+};
+
+struct sata_dwc_host_priv {
+ void __iomem *scr_addr_sstatus;
+ u32 sata_dwc_sactive_issued ;
+ u32 sata_dwc_sactive_queued ;
+ u32 dma_interrupt_count;
+ struct ahb_dma_regs *sata_dma_regs;
+ struct device *dwc_dev;
+};
+struct sata_dwc_host_priv host_pvt;
+/*
+ * Prototypes
+ */
+static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag);
+static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
+ u32 check_status);
+static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status);
+static void sata_dwc_port_stop(struct ata_port *ap);
+static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag);
+static int dma_dwc_init(struct sata_dwc_device *hsdev, int irq);
+static void dma_dwc_exit(struct sata_dwc_device *hsdev);
+static int dma_dwc_xfer_setup(struct scatterlist *sg, int num_elems,
+ struct lli *lli, dma_addr_t dma_lli,
+ void __iomem *addr, int dir);
+static void dma_dwc_xfer_start(int dma_ch);
+
+static void sata_dwc_tf_dump(struct ata_taskfile *tf)
+{
+ dev_vdbg(host_pvt.dwc_dev, "taskfile cmd: 0x%02x protocol: %s flags:"
+ "0x%lx device: %x\n", tf->command, ata_get_cmd_descript\
+ (tf->protocol), tf->flags, tf->device);
+ dev_vdbg(host_pvt.dwc_dev, "feature: 0x%02x nsect: 0x%x lbal: 0x%x "
+ "lbam: 0x%x lbah: 0x%x\n", tf->feature, tf->nsect, tf->lbal,
+ tf->lbam, tf->lbah);
+ dev_vdbg(host_pvt.dwc_dev, "hob_feature: 0x%02x hob_nsect: 0x%x "
+ "hob_lbal: 0x%x hob_lbam: 0x%x hob_lbah: 0x%x\n",
+ tf->hob_feature, tf->hob_nsect, tf->hob_lbal, tf->hob_lbam,
+ tf->hob_lbah);
+}
+
+/*
+ * Function: get_burst_length_encode
+ * arguments: datalength: length in bytes of data
+ * returns value to be programmed in register corrresponding to data length
+ * This value is effectively the log(base 2) of the length
+ */
+static int get_burst_length_encode(int datalength)
+{
+ int items = datalength >> 2; /* div by 4 to get lword count */
+
+ if (items >= 64)
+ return 5;
+
+ if (items >= 32)
+ return 4;
+
+ if (items >= 16)
+ return 3;
+
+ if (items >= 8)
+ return 2;
+
+ if (items >= 4)
+ return 1;
+
+ return 0;
+}
+
+static void clear_chan_interrupts(int c)
+{
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.tfr.low),
+ DMA_CHANNEL(c));
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.block.low),
+ DMA_CHANNEL(c));
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.srctran.low),
+ DMA_CHANNEL(c));
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.dsttran.low),
+ DMA_CHANNEL(c));
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear.error.low),
+ DMA_CHANNEL(c));
+}
+
+/*
+ * Function: dma_request_channel
+ * arguments: None
+ * returns channel number if available else -1
+ * This function assigns the next available DMA channel from the list to the
+ * requester
+ */
+static int dma_request_channel(void)
+{
+ int i;
+
+ for (i = 0; i < DMA_NUM_CHANS; i++) {
+ if (!(in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)) &\
+ DMA_CHANNEL(i)))
+ return i;
+ }
+ dev_err(host_pvt.dwc_dev, "%s NO channel chan_en: 0x%08x\n", __func__,
+ in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)));
+ return -1;
+}
+
+/*
+ * Function: dma_dwc_interrupt
+ * arguments: irq, dev_id, pt_regs
+ * returns channel number if available else -1
+ * Interrupt Handler for DW AHB SATA DMA
+ */
+static irqreturn_t dma_dwc_interrupt(int irq, void *hsdev_instance)
+{
+ int chan;
+ u32 tfr_reg, err_reg;
+ unsigned long flags;
+ struct sata_dwc_device *hsdev =
+ (struct sata_dwc_device *)hsdev_instance;
+ struct ata_host *host = (struct ata_host *)hsdev->host;
+ struct ata_port *ap;
+ struct sata_dwc_device_port *hsdevp;
+ u8 tag = 0;
+ unsigned int port = 0;
+
+ spin_lock_irqsave(&host->lock, flags);
+ ap = host->ports[port];
+ hsdevp = HSDEVP_FROM_AP(ap);
+ tag = ap->link.active_tag;
+
+ tfr_reg = in_le32(&(host_pvt.sata_dma_regs->interrupt_status.tfr\
+ .low));
+ err_reg = in_le32(&(host_pvt.sata_dma_regs->interrupt_status.error\
+ .low));
+
+ dev_dbg(ap->dev, "eot=0x%08x err=0x%08x pending=%d active port=%d\n",
+ tfr_reg, err_reg, hsdevp->dma_pending[tag], port);
+
+ for (chan = 0; chan < DMA_NUM_CHANS; chan++) {
+ /* Check for end-of-transfer interrupt. */
+ if (tfr_reg & DMA_CHANNEL(chan)) {
+ /*
+ * Each DMA command produces 2 interrupts. Only
+ * complete the command after both interrupts have been
+ * seen. (See sata_dwc_isr())
+ */
+ host_pvt.dma_interrupt_count++;
+ sata_dwc_clear_dmacr(hsdevp, tag);
+
+ if (hsdevp->dma_pending[tag] ==
+ SATA_DWC_DMA_PENDING_NONE) {
+ dev_err(ap->dev, "DMA not pending eot=0x%08x "
+ "err=0x%08x tag=0x%02x pending=%d\n",
+ tfr_reg, err_reg, tag,
+ hsdevp->dma_pending[tag]);
+ }
+
+ if ((host_pvt.dma_interrupt_count % 2) == 0)
+ sata_dwc_dma_xfer_complete(ap, 1);
+
+ /* Clear the interrupt */
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear\
+ .tfr.low),
+ DMA_CHANNEL(chan));
+ }
+
+ /* Check for error interrupt. */
+ if (err_reg & DMA_CHANNEL(chan)) {
+ /* TODO Need error handler ! */
+ dev_err(ap->dev, "error interrupt err_reg=0x%08x\n",
+ err_reg);
+
+ /* Clear the interrupt. */
+ out_le32(&(host_pvt.sata_dma_regs->interrupt_clear\
+ .error.low),
+ DMA_CHANNEL(chan));
+ }
+ }
+ spin_unlock_irqrestore(&host->lock, flags);
+ return IRQ_HANDLED;
+}
+
+/*
+ * Function: dma_request_interrupts
+ * arguments: hsdev
+ * returns status
+ * This function registers ISR for a particular DMA channel interrupt
+ */
+static int dma_request_interrupts(struct sata_dwc_device *hsdev, int irq)
+{
+ int retval = 0;
+ int chan;
+
+ for (chan = 0; chan < DMA_NUM_CHANS; chan++) {
+ /* Unmask error interrupt */
+ out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.error.low,
+ DMA_ENABLE_CHAN(chan));
+
+ /* Unmask end-of-transfer interrupt */
+ out_le32(&(host_pvt.sata_dma_regs)->interrupt_mask.tfr.low,
+ DMA_ENABLE_CHAN(chan));
+ }
+
+ retval = request_irq(irq, dma_dwc_interrupt, 0, "SATA DMA", hsdev);
+ if (retval) {
+ dev_err(host_pvt.dwc_dev, "%s: could not get IRQ %d\n",
+ __func__, irq);
+ return -ENODEV;
+ }
+
+ /* Mark this interrupt as requested */
+ hsdev->irq_dma = irq;
+ return 0;
+}
+
+/*
+ * Function: map_sg_to_lli
+ * The Synopsis driver has a comment proposing that better performance
+ * is possible by only enabling interrupts on the last item in the linked list.
+ * However, it seems that could be a problem if an error happened on one of the
+ * first items. The transfer would halt, but no error interrupt would occur.
+ * Currently this function sets interrupts enabled for each linked list item:
+ * DMA_CTL_INT_EN.
+ */
+static int map_sg_to_lli(struct scatterlist *sg, int num_elems,
+ struct lli *lli, dma_addr_t dma_lli,
+ void __iomem *dmadr_addr, int dir)
+{
+ int i, idx = 0;
+ int fis_len = 0;
+ dma_addr_t next_llp;
+ int bl;
+
+ dev_dbg(host_pvt.dwc_dev, "%s: sg=%p nelem=%d lli=%p dma_lli=0x%08x"
+ " dmadr=0x%08x\n", __func__, sg, num_elems, lli, (u32)dma_lli,
+ (u32)dmadr_addr);
+
+ bl = get_burst_length_encode(AHB_DMA_BRST_DFLT);
+
+ for (i = 0; i < num_elems; i++, sg++) {
+ u32 addr, offset;
+ u32 sg_len, len;
+
+ addr = (u32) sg_dma_address(sg);
+ sg_len = sg_dma_len(sg);
+
+ dev_dbg(host_pvt.dwc_dev, "%s: elem=%d sg_addr=0x%x sg_len"
+ "=%d\n", __func__, i, addr, sg_len);
+
+ while (sg_len) {
+ if (idx >= SATA_DWC_DMAC_LLI_NUM) {
+ /* The LLI table is not large enough. */
+ dev_err(host_pvt.dwc_dev, "LLI table overrun "
+ "(idx=%d)\n", idx);
+ break;
+ }
+ len = (sg_len > SATA_DWC_DMAC_CTRL_TSIZE_MAX) ?
+ SATA_DWC_DMAC_CTRL_TSIZE_MAX : sg_len;
+
+ offset = addr & 0xffff;
+ if ((offset + sg_len) > 0x10000)
+ len = 0x10000 - offset;
+
+ /*
+ * Make sure a LLI block is not created that will span
+ * 8K max FIS boundary. If the block spans such a FIS
+ * boundary, there is a chance that a DMA burst will
+ * cross that boundary -- this results in an error in
+ * the host controller.
+ */
+ if (fis_len + len > 8192) {
+ dev_dbg(host_pvt.dwc_dev, "SPLITTING: fis_len="
+ "%d(0x%x) len=%d(0x%x)\n", fis_len,
+ fis_len, len, len);
+ len = 8192 - fis_len;
+ fis_len = 0;
+ } else {
+ fis_len += len;
+ }
+ if (fis_len == 8192)
+ fis_len = 0;
+
+ /*
+ * Set DMA addresses and lower half of control register
+ * based on direction.
+ */
+ if (dir == DMA_FROM_DEVICE) {
+ lli[idx].dar = cpu_to_le32(addr);
+ lli[idx].sar = cpu_to_le32((u32)dmadr_addr);
+
+ lli[idx].ctl.low = cpu_to_le32(
+ DMA_CTL_TTFC(DMA_CTL_TTFC_P2M_DMAC) |
+ DMA_CTL_SMS(0) |
+ DMA_CTL_DMS(1) |
+ DMA_CTL_SRC_MSIZE(bl) |
+ DMA_CTL_DST_MSIZE(bl) |
+ DMA_CTL_SINC_NOCHANGE |
+ DMA_CTL_SRC_TRWID(2) |
+ DMA_CTL_DST_TRWID(2) |
+ DMA_CTL_INT_EN |
+ DMA_CTL_LLP_SRCEN |
+ DMA_CTL_LLP_DSTEN);
+ } else { /* DMA_TO_DEVICE */
+ lli[idx].sar = cpu_to_le32(addr);
+ lli[idx].dar = cpu_to_le32((u32)dmadr_addr);
+
+ lli[idx].ctl.low = cpu_to_le32(
+ DMA_CTL_TTFC(DMA_CTL_TTFC_M2P_PER) |
+ DMA_CTL_SMS(1) |
+ DMA_CTL_DMS(0) |
+ DMA_CTL_SRC_MSIZE(bl) |
+ DMA_CTL_DST_MSIZE(bl) |
+ DMA_CTL_DINC_NOCHANGE |
+ DMA_CTL_SRC_TRWID(2) |
+ DMA_CTL_DST_TRWID(2) |
+ DMA_CTL_INT_EN |
+ DMA_CTL_LLP_SRCEN |
+ DMA_CTL_LLP_DSTEN);
+ }
+
+ dev_dbg(host_pvt.dwc_dev, "%s setting ctl.high len: "
+ "0x%08x val: 0x%08x\n", __func__,
+ len, DMA_CTL_BLK_TS(len / 4));
+
+ /* Program the LLI CTL high register */
+ lli[idx].ctl.high = cpu_to_le32(DMA_CTL_BLK_TS\
+ (len / 4));
+
+ /* Program the next pointer. The next pointer must be
+ * the physical address, not the virtual address.
+ */
+ next_llp = (dma_lli + ((idx + 1) * sizeof(struct \
+ lli)));
+
+ /* The last 2 bits encode the list master select. */
+ next_llp = DMA_LLP_LMS(next_llp, DMA_LLP_AHBMASTER2);
+
+ lli[idx].llp = cpu_to_le32(next_llp);
+ idx++;
+ sg_len -= len;
+ addr += len;
+ }
+ }
+
+ /*
+ * The last next ptr has to be zero and the last control low register
+ * has to have LLP_SRC_EN and LLP_DST_EN (linked list pointer source
+ * and destination enable) set back to 0 (disabled.) This is what tells
+ * the core that this is the last item in the linked list.
+ */
+ if (idx) {
+ lli[idx-1].llp = 0x00000000;
+ lli[idx-1].ctl.low &= DMA_CTL_LLP_DISABLE_LE32;
+
+ /* Flush cache to memory */
+ dma_cache_sync(NULL, lli, (sizeof(struct lli) * idx),
+ DMA_BIDIRECTIONAL);
+ }
+
+ return idx;
+}
+
+/*
+ * Function: dma_dwc_xfer_start
+ * arguments: Channel number
+ * Return : None
+ * Enables the DMA channel
+ */
+static void dma_dwc_xfer_start(int dma_ch)
+{
+ /* Enable the DMA channel */
+ out_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low),
+ in_le32(&(host_pvt.sata_dma_regs->dma_chan_en.low)) |
+ DMA_ENABLE_CHAN(dma_ch));
+}
+
+static int dma_dwc_xfer_setup(struct scatterlist *sg, int num_elems,
+ struct lli *lli, dma_addr_t dma_lli,
+ void __iomem *addr, int dir)
+{
+ int dma_ch;
+ int num_lli;
+ /* Acquire DMA channel */
+ dma_ch = dma_request_channel();
+ if (dma_ch == -1) {
+ dev_err(host_pvt.dwc_dev, "%s: dma channel unavailable\n",
+ __func__);
+ return -EAGAIN;
+ }
+
+ /* Convert SG list to linked list of items (LLIs) for AHB DMA */
+ num_lli = map_sg_to_lli(sg, num_elems, lli, dma_lli, addr, dir);
+
+ dev_dbg(host_pvt.dwc_dev, "%s sg: 0x%p, count: %d lli: %p dma_lli:"
+ " 0x%0xlx addr: %p lli count: %d\n", __func__, sg, num_elems,
+ lli, (u32)dma_lli, addr, num_lli);
+
+ clear_chan_interrupts(dma_ch);
+
+ /* Program the CFG register. */
+ out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.high),
+ DMA_CFG_PROTCTL | DMA_CFG_FCMOD_REQ);
+ out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.low), 0);
+
+ /* Program the address of the linked list */
+ out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].llp.low),
+ DMA_LLP_LMS(dma_lli, DMA_LLP_AHBMASTER2));
+
+ /* Program the CTL register with src enable / dst enable */
+ out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].ctl.low),
+ DMA_CTL_LLP_SRCEN | DMA_CTL_LLP_DSTEN);
+ return 0;
+}
+
+/*
+ * Function: dma_dwc_exit
+ * arguments: None
+ * returns status
+ * This function exits the SATA DMA driver
+ */
+static void dma_dwc_exit(struct sata_dwc_device *hsdev)
+{
+ dev_dbg(host_pvt.dwc_dev, "%s:\n", __func__);
+ if (host_pvt.sata_dma_regs)
+ iounmap(host_pvt.sata_dma_regs);
+
+ if (hsdev->irq_dma)
+ free_irq(hsdev->irq_dma, hsdev);
+}
+
+/*
+ * Function: dma_dwc_init
+ * arguments: hsdev
+ * returns status
+ * This function initializes the SATA DMA driver
+ */
+static int dma_dwc_init(struct sata_dwc_device *hsdev, int irq)
+{
+ int err;
+
+ err = dma_request_interrupts(hsdev, irq);
+ if (err) {
+ dev_err(host_pvt.dwc_dev, "%s: dma_request_interrupts returns"
+ " %d\n", __func__, err);
+ goto error_out;
+ }
+
+ /* Enabe DMA */
+ out_le32(&(host_pvt.sata_dma_regs->dma_cfg.low), DMA_EN);
+
+ dev_notice(host_pvt.dwc_dev, "DMA initialized\n");
+ dev_dbg(host_pvt.dwc_dev, "SATA DMA registers=0x%p\n", host_pvt.\
+ sata_dma_regs);
+
+ return 0;
+
+error_out:
+ dma_dwc_exit(hsdev);
+
+ return err;
+}
+
+static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
+{
+ if (scr > SCR_NOTIFICATION) {
+ dev_err(link->ap->dev, "%s: Incorrect SCR offset 0x%02x\n",
+ __func__, scr);
+ return -EINVAL;
+ }
+
+ *val = in_le32((void *)link->ap->ioaddr.scr_addr + (scr * 4));
+ dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=val=0x%08x\n",
+ __func__, link->ap->print_id, scr, *val);
+
+ return 0;
+}
+
+static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val)
+{
+ dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=val=0x%08x\n",
+ __func__, link->ap->print_id, scr, val);
+ if (scr > SCR_NOTIFICATION) {
+ dev_err(link->ap->dev, "%s: Incorrect SCR offset 0x%02x\n",
+ __func__, scr);
+ return -EINVAL;
+ }
+ out_le32((void *)link->ap->ioaddr.scr_addr + (scr * 4), val);
+
+ return 0;
+}
+
+static u32 core_scr_read(unsigned int scr)
+{
+ return in_le32((void __iomem *)(host_pvt.scr_addr_sstatus) +\
+ (scr * 4));
+}
+
+static void core_scr_write(unsigned int scr, u32 val)
+{
+ out_le32((void __iomem *)(host_pvt.scr_addr_sstatus) + (scr * 4),
+ val);
+}
+
+static void clear_serror(void)
+{
+ u32 val;
+ val = core_scr_read(SCR_ERROR);
+ core_scr_write(SCR_ERROR, val);
+
+}
+
+static void clear_interrupt_bit(struct sata_dwc_device *hsdev, u32 bit)
+{
+ out_le32(&hsdev->sata_dwc_regs->intpr,
+ in_le32(&hsdev->sata_dwc_regs->intpr));
+}
+
+static u32 qcmd_tag_to_mask(u8 tag)
+{
+ return 0x00000001 << (tag & 0x1f);
+}
+
+/* See ahci.c */
+static void sata_dwc_error_intr(struct ata_port *ap,
+ struct sata_dwc_device *hsdev, uint intpr)
+{
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ struct ata_eh_info *ehi = &ap->link.eh_info;
+ unsigned int err_mask = 0, action = 0;
+ struct ata_queued_cmd *qc;
+ u32 serror;
+ u8 status, tag;
+ u32 err_reg;
+
+ ata_ehi_clear_desc(ehi);
+
+ serror = core_scr_read(SCR_ERROR);
+ status = ap->ops->sff_check_status(ap);
+
+ err_reg = in_le32(&(host_pvt.sata_dma_regs->interrupt_status.error.\
+ low));
+ tag = ap->link.active_tag;
+
+ dev_err(ap->dev, "%s SCR_ERROR=0x%08x intpr=0x%08x status=0x%08x "
+ "dma_intp=%d pending=%d issued=%d dma_err_status=0x%08x\n",
+ __func__, serror, intpr, status, host_pvt.dma_interrupt_count,
+ hsdevp->dma_pending[tag], hsdevp->cmd_issued[tag], err_reg);
+
+ /* Clear error register and interrupt bit */
+ clear_serror();
+ clear_interrupt_bit(hsdev, SATA_DWC_INTPR_ERR);
+
+ /* This is the only error happening now. TODO check for exact error */
+
+ err_mask |= AC_ERR_HOST_BUS;
+ action |= ATA_EH_RESET;
+
+ /* Pass this on to EH */
+ ehi->serror |= serror;
+ ehi->action |= action;
+
+ qc = ata_qc_from_tag(ap, tag);
+ if (qc)
+ qc->err_mask |= err_mask;
+ else
+ ehi->err_mask |= err_mask;
+
+ ata_port_abort(ap);
+}
+
+/*
+ * Function : sata_dwc_isr
+ * arguments : irq, void *dev_instance, struct pt_regs *regs
+ * Return value : irqreturn_t - status of IRQ
+ * This Interrupt handler called via port ops registered function.
+ * .irq_handler = sata_dwc_isr
+ */
+static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
+{
+ struct ata_host *host = (struct ata_host *)dev_instance;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_HOST(host);
+ struct ata_port *ap;
+ struct ata_queued_cmd *qc;
+ unsigned long flags;
+ u8 status, tag;
+ int handled, num_processed, port = 0;
+ uint intpr, sactive, sactive2, tag_mask;
+ struct sata_dwc_device_port *hsdevp;
+ host_pvt.sata_dwc_sactive_issued = 0;
+
+ spin_lock_irqsave(&host->lock, flags);
+
+ /* Read the interrupt register */
+ intpr = in_le32(&hsdev->sata_dwc_regs->intpr);
+
+ ap = host->ports[port];
+ hsdevp = HSDEVP_FROM_AP(ap);
+
+ dev_dbg(ap->dev, "%s intpr=0x%08x active_tag=%d\n", __func__, intpr,
+ ap->link.active_tag);
+
+ /* Check for error interrupt */
+ if (intpr & SATA_DWC_INTPR_ERR) {
+ sata_dwc_error_intr(ap, hsdev, intpr);
+ handled = 1;
+ goto DONE;
+ }
+
+ /* Check for DMA SETUP FIS (FP DMA) interrupt */
+ if (intpr & SATA_DWC_INTPR_NEWFP) {
+ clear_interrupt_bit(hsdev, SATA_DWC_INTPR_NEWFP);
+
+ tag = (u8)(in_le32(&hsdev->sata_dwc_regs->fptagr));
+ dev_dbg(ap->dev, "%s: NEWFP tag=%d\n", __func__, tag);
+ if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_PEND)
+ dev_warn(ap->dev, "CMD tag=%d not pending?\n", tag);
+
+ host_pvt.sata_dwc_sactive_issued |= qcmd_tag_to_mask(tag);
+
+ qc = ata_qc_from_tag(ap, tag);
+ /*
+ * Start FP DMA for NCQ command. At this point the tag is the
+ * active tag. It is the tag that matches the command about to
+ * be completed.
+ */
+ qc->ap->link.active_tag = tag;
+ sata_dwc_bmdma_start_by_tag(qc, tag);
+
+ handled = 1;
+ goto DONE;
+ }
+ sactive = core_scr_read(SCR_ACTIVE);
+ tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive;
+
+ /* If no sactive issued and tag_mask is zero then this is not NCQ */
+ if (host_pvt.sata_dwc_sactive_issued == 0 && tag_mask == 0) {
+ if (ap->link.active_tag == ATA_TAG_POISON)
+ tag = 0;
+ else
+ tag = ap->link.active_tag;
+ qc = ata_qc_from_tag(ap, tag);
+
+ /* DEV interrupt w/ no active qc? */
+ if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) {
+ dev_err(ap->dev, "%s interrupt with no active qc "
+ "qc=%p\n", __func__, qc);
+ ap->ops->sff_check_status(ap);
+ handled = 1;
+ goto DONE;
+ }
+ status = ap->ops->sff_check_status(ap);
+
+ qc->ap->link.active_tag = tag;
+ hsdevp->cmd_issued[tag] = SATA_DWC_CMD_ISSUED_NOT;
+
+ if (status & ATA_ERR) {
+ dev_dbg(ap->dev, "interrupt ATA_ERR (0x%x)\n", status);
+ sata_dwc_qc_complete(ap, qc, 1);
+ handled = 1;
+ goto DONE;
+ }
+
+ dev_dbg(ap->dev, "%s non-NCQ cmd interrupt, protocol: %s\n",
+ __func__, ata_get_cmd_descript(qc->tf.protocol));
+DRVSTILLBUSY:
+ if (ata_is_dma(qc->tf.protocol)) {
+ /*
+ * Each DMA transaction produces 2 interrupts. The DMAC
+ * transfer complete interrupt and the SATA controller
+ * operation done interrupt. The command should be
+ * completed only after both interrupts are seen.
+ */
+ host_pvt.dma_interrupt_count++;
+ if (hsdevp->dma_pending[tag] == \
+ SATA_DWC_DMA_PENDING_NONE) {
+ dev_err(ap->dev, "%s: DMA not pending "
+ "intpr=0x%08x status=0x%08x pending"
+ "=%d\n", __func__, intpr, status,
+ hsdevp->dma_pending[tag]);
+ }
+
+ if ((host_pvt.dma_interrupt_count % 2) == 0)
+ sata_dwc_dma_xfer_complete(ap, 1);
+ } else if (ata_is_pio(qc->tf.protocol)) {
+ ata_sff_hsm_move(ap, qc, status, 0);
+ handled = 1;
+ goto DONE;
+ } else {
+ if (unlikely(sata_dwc_qc_complete(ap, qc, 1)))
+ goto DRVSTILLBUSY;
+ }
+
+ handled = 1;
+ goto DONE;
+ }
+
+ /*
+ * This is a NCQ command. At this point we need to figure out for which
+ * tags we have gotten a completion interrupt. One interrupt may serve
+ * as completion for more than one operation when commands are queued
+ * (NCQ). We need to process each completed command.
+ */
+
+ /* process completed commands */
+ sactive = core_scr_read(SCR_ACTIVE);
+ tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive;
+
+ if (sactive != 0 || (host_pvt.sata_dwc_sactive_issued) > 1 || \
+ tag_mask > 1) {
+ dev_dbg(ap->dev, "%s NCQ:sactive=0x%08x sactive_issued=0x%08x"
+ "tag_mask=0x%08x\n", __func__, sactive,
+ host_pvt.sata_dwc_sactive_issued, tag_mask);
+ }
+
+ if ((tag_mask | (host_pvt.sata_dwc_sactive_issued)) != \
+ (host_pvt.sata_dwc_sactive_issued)) {
+ dev_warn(ap->dev, "Bad tag mask? sactive=0x%08x "
+ "(host_pvt.sata_dwc_sactive_issued)=0x%08x tag_mask"
+ "=0x%08x\n", sactive, host_pvt.sata_dwc_sactive_issued,
+ tag_mask);
+ }
+
+ /* read just to clear ... not bad if currently still busy */
+ status = ap->ops->sff_check_status(ap);
+ dev_dbg(ap->dev, "%s ATA status register=0x%x\n", __func__, status);
+
+ tag = 0;
+ num_processed = 0;
+ while (tag_mask) {
+ num_processed++;
+ while (!(tag_mask & 0x00000001)) {
+ tag++;
+ tag_mask <<= 1;
+ }
+
+ tag_mask &= (~0x00000001);
+ qc = ata_qc_from_tag(ap, tag);
+
+ /* To be picked up by completion functions */
+ qc->ap->link.active_tag = tag;
+ hsdevp->cmd_issued[tag] = SATA_DWC_CMD_ISSUED_NOT;
+
+ /* Let libata/scsi layers handle error */
+ if (status & ATA_ERR) {
+ dev_dbg(ap->dev, "%s ATA_ERR (0x%x)\n", __func__,
+ status);
+ sata_dwc_qc_complete(ap, qc, 1);
+ handled = 1;
+ goto DONE;
+ }
+
+ /* Process completed command */
+ dev_dbg(ap->dev, "%s NCQ command, protocol: %s\n", __func__,
+ ata_get_cmd_descript(qc->tf.protocol));
+ if (ata_is_dma(qc->tf.protocol)) {
+ host_pvt.dma_interrupt_count++;
+ if (hsdevp->dma_pending[tag] == \
+ SATA_DWC_DMA_PENDING_NONE)
+ dev_warn(ap->dev, "%s: DMA not pending?\n",
+ __func__);
+ if ((host_pvt.dma_interrupt_count % 2) == 0)
+ sata_dwc_dma_xfer_complete(ap, 1);
+ } else {
+ if (unlikely(sata_dwc_qc_complete(ap, qc, 1)))
+ goto STILLBUSY;
+ }
+ continue;
+
+STILLBUSY:
+ ap->stats.idle_irq++;
+ dev_warn(ap->dev, "STILL BUSY IRQ ata%d: irq trap\n",
+ ap->print_id);
+ } /* while tag_mask */
+
+ /*
+ * Check to see if any commands completed while we were processing our
+ * initial set of completed commands (read status clears interrupts,
+ * so we might miss a completed command interrupt if one came in while
+ * we were processing --we read status as part of processing a completed
+ * command).
+ */
+ sactive2 = core_scr_read(SCR_ACTIVE);
+ if (sactive2 != sactive) {
+ dev_dbg(ap->dev, "More completed - sactive=0x%x sactive2"
+ "=0x%x\n", sactive, sactive2);
+ }
+ handled = 1;
+
+DONE:
+ spin_unlock_irqrestore(&host->lock, flags);
+ return IRQ_RETVAL(handled);
+}
+
+static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag)
+{
+ struct sata_dwc_device *hsdev = HSDEV_FROM_HSDEVP(hsdevp);
+
+ if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_RX) {
+ out_le32(&(hsdev->sata_dwc_regs->dmacr),
+ SATA_DWC_DMACR_RX_CLEAR(
+ in_le32(&(hsdev->sata_dwc_regs->dmacr))));
+ } else if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX) {
+ out_le32(&(hsdev->sata_dwc_regs->dmacr),
+ SATA_DWC_DMACR_TX_CLEAR(
+ in_le32(&(hsdev->sata_dwc_regs->dmacr))));
+ } else {
+ /*
+ * This should not happen, it indicates the driver is out of
+ * sync. If it does happen, clear dmacr anyway.
+ */
+ dev_err(host_pvt.dwc_dev, "%s DMA protocol RX and"
+ "TX DMA not pending tag=0x%02x pending=%d"
+ " dmacr: 0x%08x\n", __func__, tag,
+ hsdevp->dma_pending[tag],
+ in_le32(&(hsdev->sata_dwc_regs->dmacr)));
+ out_le32(&(hsdev->sata_dwc_regs->dmacr),
+ SATA_DWC_DMACR_TXRXCH_CLEAR);
+ }
+}
+
+static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status)
+{
+ struct ata_queued_cmd *qc;
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+ u8 tag = 0;
+
+ tag = ap->link.active_tag;
+ qc = ata_qc_from_tag(ap, tag);
+ if (!qc) {
+ dev_err(ap->dev, "failed to get qc");
+ return;
+ }
+
+#ifdef DEBUG_NCQ
+ if (tag > 0) {
+ dev_info(ap->dev, "%s tag=%u cmd=0x%02x dma dir=%s proto=%s "
+ "dmacr=0x%08x\n", __func__, qc->tag, qc->tf.command,
+ ata_get_cmd_descript(qc->dma_dir),
+ ata_get_cmd_descript(qc->tf.protocol),
+ in_le32(&(hsdev->sata_dwc_regs->dmacr)));
+ }
+#endif
+
+ if (ata_is_dma(qc->tf.protocol)) {
+ if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_NONE) {
+ dev_err(ap->dev, "%s DMA protocol RX and TX DMA not "
+ "pending dmacr: 0x%08x\n", __func__,
+ in_le32(&(hsdev->sata_dwc_regs->dmacr)));
+ }
+
+ hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_NONE;
+ sata_dwc_qc_complete(ap, qc, check_status);
+ ap->link.active_tag = ATA_TAG_POISON;
+ } else {
+ sata_dwc_qc_complete(ap, qc, check_status);
+ }
+}
+
+static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
+ u32 check_status)
+{
+ u8 status = 0;
+ u32 mask = 0x0;
+ u8 tag = qc->tag;
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ host_pvt.sata_dwc_sactive_queued = 0;
+ dev_dbg(ap->dev, "%s checkstatus? %x\n", __func__, check_status);
+
+ if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX)
+ dev_err(ap->dev, "TX DMA PENDING\n");
+ else if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_RX)
+ dev_err(ap->dev, "RX DMA PENDING\n");
+ dev_dbg(ap->dev, "QC complete cmd=0x%02x status=0x%02x ata%u:"
+ " protocol=%d\n", qc->tf.command, status, ap->print_id,
+ qc->tf.protocol);
+
+ /* clear active bit */
+ mask = (~(qcmd_tag_to_mask(tag)));
+ host_pvt.sata_dwc_sactive_queued = (host_pvt.sata_dwc_sactive_queued) \
+ & mask;
+ host_pvt.sata_dwc_sactive_issued = (host_pvt.sata_dwc_sactive_issued) \
+ & mask;
+ ata_qc_complete(qc);
+ return 0;
+}
+
+static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev)
+{
+ /* Enable selective interrupts by setting the interrupt maskregister*/
+ out_le32(&hsdev->sata_dwc_regs->intmr,
+ SATA_DWC_INTMR_ERRM |
+ SATA_DWC_INTMR_NEWFPM |
+ SATA_DWC_INTMR_PMABRTM |
+ SATA_DWC_INTMR_DMATM);
+ /*
+ * Unmask the error bits that should trigger an error interrupt by
+ * setting the error mask register.
+ */
+ out_le32(&hsdev->sata_dwc_regs->errmr, SATA_DWC_SERROR_ERR_BITS);
+
+ dev_dbg(host_pvt.dwc_dev, "%s: INTMR = 0x%08x, ERRMR = 0x%08x\n",
+ __func__, in_le32(&hsdev->sata_dwc_regs->intmr),
+ in_le32(&hsdev->sata_dwc_regs->errmr));
+}
+
+static void sata_dwc_setup_port(struct ata_ioports *port, unsigned long base)
+{
+ port->cmd_addr = (void *)base + 0x00;
+ port->data_addr = (void *)base + 0x00;
+
+ port->error_addr = (void *)base + 0x04;
+ port->feature_addr = (void *)base + 0x04;
+
+ port->nsect_addr = (void *)base + 0x08;
+
+ port->lbal_addr = (void *)base + 0x0c;
+ port->lbam_addr = (void *)base + 0x10;
+ port->lbah_addr = (void *)base + 0x14;
+
+ port->device_addr = (void *)base + 0x18;
+ port->command_addr = (void *)base + 0x1c;
+ port->status_addr = (void *)base + 0x1c;
+
+ port->altstatus_addr = (void *)base + 0x20;
+ port->ctl_addr = (void *)base + 0x20;
+}
+
+/*
+ * Function : sata_dwc_port_start
+ * arguments : struct ata_ioports *port
+ * Return value : returns 0 if success, error code otherwise
+ * This function allocates the scatter gather LLI table for AHB DMA
+ */
+static int sata_dwc_port_start(struct ata_port *ap)
+{
+ int err = 0;
+ struct sata_dwc_device *hsdev;
+ struct sata_dwc_device_port *hsdevp = NULL;
+ struct device *pdev;
+ int i;
+
+ hsdev = HSDEV_FROM_AP(ap);
+
+ dev_dbg(ap->dev, "%s: port_no=%d\n", __func__, ap->port_no);
+
+ hsdev->host = ap->host;
+ pdev = ap->host->dev;
+ if (!pdev) {
+ dev_err(ap->dev, "%s: no ap->host->dev\n", __func__);
+ err = -ENODEV;
+ goto CLEANUP;
+ }
+
+ /* Allocate Port Struct */
+ hsdevp = kzalloc(sizeof(*hsdevp), GFP_KERNEL);
+ if (!hsdevp) {
+ dev_err(ap->dev, "%s: kmalloc failed for hsdevp\n", __func__);
+ err = -ENOMEM;
+ goto CLEANUP;
+ }
+ hsdevp->hsdev = hsdev;
+
+ for (i = 0; i < SATA_DWC_QCMD_MAX; i++)
+ hsdevp->cmd_issued[i] = SATA_DWC_CMD_ISSUED_NOT;
+
+ ap->bmdma_prd = 0; /* set these so libata doesn't use them */
+ ap->bmdma_prd_dma = 0;
+
+ /*
+ * DMA - Assign scatter gather LLI table. We can't use the libata
+ * version since it's PRD is IDE PCI specific.
+ */
+ for (i = 0; i < SATA_DWC_QCMD_MAX; i++) {
+ hsdevp->llit[i] = dma_alloc_coherent(pdev,
+ SATA_DWC_DMAC_LLI_TBL_SZ,
+ &(hsdevp->llit_dma[i]),
+ GFP_ATOMIC);
+ if (!hsdevp->llit[i]) {
+ dev_err(ap->dev, "%s: dma_alloc_coherent failed\n",
+ __func__);
+ err = -ENOMEM;
+ goto CLEANUP;
+ }
+ }
+
+ if (ap->port_no == 0) {
+ dev_dbg(ap->dev, "%s: clearing TXCHEN, RXCHEN in DMAC\n",
+ __func__);
+ out_le32(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_TXRXCH_CLEAR);
+
+ dev_dbg(ap->dev, "%s: setting burst size in DBTSR\n",
+ __func__);
+ out_le32(&hsdev->sata_dwc_regs->dbtsr,
+ (SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) |
+ SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT)));
+ }
+
+ /* Clear any error bits before libata starts issuing commands */
+ clear_serror();
+ ap->private_data = hsdevp;
+
+CLEANUP:
+ if (err) {
+ sata_dwc_port_stop(ap);
+ dev_dbg(ap->dev, "%s: fail\n", __func__);
+ } else {
+ dev_dbg(ap->dev, "%s: done\n", __func__);
+ }
+
+ return err;
+}
+
+static void sata_dwc_port_stop(struct ata_port *ap)
+{
+ int i;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+
+ dev_dbg(ap->dev, "%s: ap->id = %d\n", __func__, ap->print_id);
+
+ if (hsdevp && hsdev) {
+ /* deallocate LLI table */
+ for (i = 0; i < SATA_DWC_QCMD_MAX; i++) {
+ dma_free_coherent(ap->host->dev,
+ SATA_DWC_DMAC_LLI_TBL_SZ,
+ hsdevp->llit[i], hsdevp->llit_dma[i]);
+ }
+
+ kfree(hsdevp);
+ }
+ ap->private_data = NULL;
+}
+
+/*
+ * Function : sata_dwc_exec_command_by_tag
+ * arguments : ata_port *ap, ata_taskfile *tf, u8 tag, u32 cmd_issued
+ * Return value : None
+ * This function keeps track of individual command tag ids and calls
+ * ata_exec_command in libata
+ */
+static void sata_dwc_exec_command_by_tag(struct ata_port *ap,
+ struct ata_taskfile *tf,
+ u8 tag, u32 cmd_issued)
+{
+ unsigned long flags;
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+
+ dev_dbg(ap->dev, "%s cmd(0x%02x): %s tag=%d\n", __func__, tf->command,
+ ata_get_cmd_descript(tf), tag);
+
+ spin_lock_irqsave(&ap->host->lock, flags);
+ hsdevp->cmd_issued[tag] = cmd_issued;
+ spin_unlock_irqrestore(&ap->host->lock, flags);
+ /*
+ * Clear SError before executing a new command.
+ * sata_dwc_scr_write and read can not be used here. Clearing the PM
+ * managed SError register for the disk needs to be done before the
+ * task file is loaded.
+ */
+ clear_serror();
+ ata_sff_exec_command(ap, tf);
+}
+
+static void sata_dwc_bmdma_setup_by_tag(struct ata_queued_cmd *qc, u8 tag)
+{
+ sata_dwc_exec_command_by_tag(qc->ap, &qc->tf, tag,
+ SATA_DWC_CMD_ISSUED_PEND);
+}
+
+static void sata_dwc_bmdma_setup(struct ata_queued_cmd *qc)
+{
+ u8 tag = qc->tag;
+
+ if (ata_is_ncq(qc->tf.protocol)) {
+ dev_dbg(qc->ap->dev, "%s: ap->link.sactive=0x%08x tag=%d\n",
+ __func__, qc->ap->link.sactive, tag);
+ } else {
+ tag = 0;
+ }
+ sata_dwc_bmdma_setup_by_tag(qc, tag);
+}
+
+static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag)
+{
+ int start_dma;
+ u32 reg, dma_chan;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_QC(qc);
+ struct ata_port *ap = qc->ap;
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ int dir = qc->dma_dir;
+ dma_chan = hsdevp->dma_chan[tag];
+
+ if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_NOT) {
+ start_dma = 1;
+ if (dir == DMA_TO_DEVICE)
+ hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_TX;
+ else
+ hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_RX;
+ } else {
+ dev_err(ap->dev, "%s: Command not pending cmd_issued=%d "
+ "(tag=%d) DMA NOT started\n", __func__,
+ hsdevp->cmd_issued[tag], tag);
+ start_dma = 0;
+ }
+
+ dev_dbg(ap->dev, "%s qc=%p tag: %x cmd: 0x%02x dma_dir: %s "
+ "start_dma? %x\n", __func__, qc, tag, qc->tf.command,
+ ata_get_cmd_descript(qc->dma_dir), start_dma);
+ sata_dwc_tf_dump(&(qc->tf));
+
+ if (start_dma) {
+ reg = core_scr_read(SCR_ERROR);
+ if (reg & SATA_DWC_SERROR_ERR_BITS) {
+ dev_err(ap->dev, "%s: ****** SError=0x%08x ******\n",
+ __func__, reg);
+ }
+
+ if (dir == DMA_TO_DEVICE)
+ out_le32(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_TXCHEN);
+ else
+ out_le32(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_RXCHEN);
+
+ /* Enable AHB DMA transfer on the specified channel */
+ dma_dwc_xfer_start(dma_chan);
+ }
+}
+
+static void sata_dwc_bmdma_start(struct ata_queued_cmd *qc)
+{
+ u8 tag = qc->tag;
+
+ if (ata_is_ncq(qc->tf.protocol)) {
+ dev_dbg(qc->ap->dev, "%s: ap->link.sactive=0x%08x tag=%d\n",
+ __func__, qc->ap->link.sactive, tag);
+ } else {
+ tag = 0;
+ }
+ dev_dbg(qc->ap->dev, "%s\n", __func__);
+ sata_dwc_bmdma_start_by_tag(qc, tag);
+}
+
+/*
+ * Function : sata_dwc_qc_prep_by_tag
+ * arguments : ata_queued_cmd *qc, u8 tag
+ * Return value : None
+ * qc_prep for a particular queued command based on tag
+ */
+static void sata_dwc_qc_prep_by_tag(struct ata_queued_cmd *qc, u8 tag)
+{
+ struct scatterlist *sg = qc->sg;
+ struct ata_port *ap = qc->ap;
+ u32 dma_chan;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ int err;
+
+ dev_dbg(ap->dev, "%s: port=%d dma dir=%s n_elem=%d\n",
+ __func__, ap->port_no, ata_get_cmd_descript(qc->dma_dir),
+ qc->n_elem);
+
+ dma_chan = dma_dwc_xfer_setup(sg, qc->n_elem, hsdevp->llit[tag],
+ hsdevp->llit_dma[tag],
+ (void *__iomem)(&hsdev->sata_dwc_regs->\
+ dmadr), qc->dma_dir);
+ if (dma_chan < 0) {
+ dev_err(ap->dev, "%s: dma_dwc_xfer_setup returns err %d\n",
+ __func__, err);
+ return;
+ }
+ hsdevp->dma_chan[tag] = dma_chan;
+}
+
+static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc)
+{
+ u32 sactive;
+ u8 tag = qc->tag;
+ struct ata_port *ap = qc->ap;
+
+#ifdef DEBUG_NCQ
+ if (qc->tag > 0 || ap->link.sactive > 1)
+ dev_info(ap->dev, "%s ap id=%d cmd(0x%02x)=%s qc tag=%d "
+ "prot=%s ap active_tag=0x%08x ap sactive=0x%08x\n",
+ __func__, ap->print_id, qc->tf.command,
+ ata_get_cmd_descript(&qc->tf),
+ qc->tag, ata_get_cmd_descript(qc->tf.protocol),
+ ap->link.active_tag, ap->link.sactive);
+#endif
+
+ if (!ata_is_ncq(qc->tf.protocol))
+ tag = 0;
+ sata_dwc_qc_prep_by_tag(qc, tag);
+
+ if (ata_is_ncq(qc->tf.protocol)) {
+ sactive = core_scr_read(SCR_ACTIVE);
+ sactive |= (0x00000001 << tag);
+ core_scr_write(SCR_ACTIVE, sactive);
+
+ dev_dbg(qc->ap->dev, "%s: tag=%d ap->link.sactive = 0x%08x "
+ "sactive=0x%08x\n", __func__, tag, qc->ap->link.sactive,
+ sactive);
+
+ ap->ops->sff_tf_load(ap, &qc->tf);
+ sata_dwc_exec_command_by_tag(ap, &qc->tf, qc->tag,
+ SATA_DWC_CMD_ISSUED_PEND);
+ } else {
+ ata_sff_qc_issue(qc);
+ }
+ return 0;
+}
+
+/*
+ * Function : sata_dwc_qc_prep
+ * arguments : ata_queued_cmd *qc
+ * Return value : None
+ * qc_prep for a particular queued command
+ */
+
+static void sata_dwc_qc_prep(struct ata_queued_cmd *qc)
+{
+ if ((qc->dma_dir == DMA_NONE) || (qc->tf.protocol == ATA_PROT_PIO))
+ return;
+
+#ifdef DEBUG_NCQ
+ if (qc->tag > 0)
+ dev_info(qc->ap->dev, "%s: qc->tag=%d ap->active_tag=0x%08x\n",
+ __func__, tag, qc->ap->link.active_tag);
+
+ return ;
+#endif
+}
+
+static void sata_dwc_error_handler(struct ata_port *ap)
+{
+ ap->link.flags |= ATA_LFLAG_NO_HRST;
+ ata_sff_error_handler(ap);
+}
+
+/*
+ * scsi mid-layer and libata interface structures
+ */
+static struct scsi_host_template sata_dwc_sht = {
+ ATA_NCQ_SHT(DRV_NAME),
+ /*
+ * test-only: Currently this driver doesn't handle NCQ
+ * correctly. We enable NCQ but set the queue depth to a
+ * max of 1. This will get fixed in in a future release.
+ */
+ .sg_tablesize = LIBATA_MAX_PRD,
+ .can_queue = ATA_DEF_QUEUE, /* ATA_MAX_QUEUE */
+ .dma_boundary = ATA_DMA_BOUNDARY,
+};
+
+static struct ata_port_operations sata_dwc_ops = {
+ .inherits = &ata_sff_port_ops,
+
+ .error_handler = sata_dwc_error_handler,
+
+ .qc_prep = sata_dwc_qc_prep,
+ .qc_issue = sata_dwc_qc_issue,
+
+ .scr_read = sata_dwc_scr_read,
+ .scr_write = sata_dwc_scr_write,
+
+ .port_start = sata_dwc_port_start,
+ .port_stop = sata_dwc_port_stop,
+
+ .bmdma_setup = sata_dwc_bmdma_setup,
+ .bmdma_start = sata_dwc_bmdma_start,
+};
+
+static const struct ata_port_info sata_dwc_port_info[] = {
+ {
+ .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
+ ATA_FLAG_MMIO | ATA_FLAG_NCQ,
+ .pio_mask = 0x1f, /* pio 0-4 */
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &sata_dwc_ops,
+ },
+};
+
+static int sata_dwc_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct sata_dwc_device *hsdev;
+ u32 idr, versionr;
+ char *ver = (char *)&versionr;
+ u8 *base = NULL;
+ int err = 0;
+ int irq, rc;
+ struct ata_host *host;
+ struct ata_port_info pi = sata_dwc_port_info[0];
+ const struct ata_port_info *ppi[] = { &pi, NULL };
+
+ /* Allocate DWC SATA device */
+ hsdev = kmalloc(sizeof(*hsdev), GFP_KERNEL);
+ if (hsdev == NULL) {
+ dev_err(&ofdev->dev, "kmalloc failed for hsdev\n");
+ err = -ENOMEM;
+ goto error_out;
+ }
+ memset(hsdev, 0, sizeof(*hsdev));
+
+ /* Ioremap SATA registers */
+ base = of_iomap(ofdev->dev.of_node, 0);
+ if (!base) {
+ dev_err(&ofdev->dev, "ioremap failed for SATA register"
+ " address\n");
+ err = -ENODEV;
+ goto error_out;
+ }
+ hsdev->reg_base = base;
+ dev_dbg(&ofdev->dev, "ioremap done for SATA register address\n");
+
+ /* Synopsys DWC SATA specific Registers */
+ hsdev->sata_dwc_regs = (void *__iomem)(base + SATA_DWC_REG_OFFSET);
+
+ /* Allocate and fill host */
+ host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_DWC_MAX_PORTS);
+ if (!host) {
+ dev_err(&ofdev->dev, "ata_host_alloc_pinfo failed\n");
+ err = -ENOMEM;
+ goto error_out;
+ }
+
+ host->private_data = hsdev;
+
+ /* Setup port */
+ host->ports[0]->ioaddr.cmd_addr = base;
+ host->ports[0]->ioaddr.scr_addr = base + SATA_DWC_SCR_OFFSET;
+ host_pvt.scr_addr_sstatus = base + SATA_DWC_SCR_OFFSET;
+ sata_dwc_setup_port(&host->ports[0]->ioaddr, (unsigned long)base);
+
+ /* Read the ID and Version Registers */
+ idr = in_le32(&hsdev->sata_dwc_regs->idr);
+ versionr = in_le32(&hsdev->sata_dwc_regs->versionr);
+ dev_notice(&ofdev->dev, "id %d, controller version %c.%c%c\n",
+ idr, ver[0], ver[1], ver[2]);
+
+ /* Get SATA DMA interrupt number */
+ irq = irq_of_parse_and_map(ofdev->dev.of_node, 1);
+ if (irq == NO_IRQ) {
+ dev_err(&ofdev->dev, "no SATA DMA irq\n");
+ err = -ENODEV;
+ goto error_out;
+ }
+
+ /* Get physical SATA DMA register base address */
+ host_pvt.sata_dma_regs = of_iomap(ofdev->dev.of_node, 1);
+ if (!(host_pvt.sata_dma_regs)) {
+ dev_err(&ofdev->dev, "ioremap failed for AHBDMA register"
+ " address\n");
+ err = -ENODEV;
+ goto error_out;
+ }
+
+ /* Save dev for later use in dev_xxx() routines */
+ host_pvt.dwc_dev = &ofdev->dev;
+
+ /* Initialize AHB DMAC */
+ dma_dwc_init(hsdev, irq);
+
+ /* Enable SATA Interrupts */
+ sata_dwc_enable_interrupts(hsdev);
+
+ /* Get SATA interrupt number */
+ irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
+ if (irq == NO_IRQ) {
+ dev_err(&ofdev->dev, "no SATA DMA irq\n");
+ err = -ENODEV;
+ goto error_out;
+ }
+
+ /*
+ * Now, register with libATA core, this will also initiate the
+ * device discovery process, invoking our port_start() handler &
+ * error_handler() to execute a dummy Softreset EH session
+ */
+ rc = ata_host_activate(host, irq, sata_dwc_isr, 0, &sata_dwc_sht);
+
+ if (rc != 0)
+ dev_err(&ofdev->dev, "failed to activate host");
+
+ dev_set_drvdata(&ofdev->dev, host);
+ return 0;
+
+error_out:
+ /* Free SATA DMA resources */
+ dma_dwc_exit(hsdev);
+
+ if (base)
+ iounmap(base);
+ return err;
+}
+
+static int sata_dwc_remove(struct of_device *ofdev)
+{
+ struct device *dev = &ofdev->dev;
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct sata_dwc_device *hsdev = host->private_data;
+
+ ata_host_detach(host);
+ dev_set_drvdata(dev, NULL);
+
+ /* Free SATA DMA resources */
+ dma_dwc_exit(hsdev);
+
+ iounmap(hsdev->reg_base);
+ kfree(hsdev);
+ kfree(host);
+ dev_dbg(&ofdev->dev, "done\n");
+ return 0;
+}
+
+static const struct of_device_id sata_dwc_match[] = {
+ { .compatible = "amcc,sata-460ex", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, sata_dwc_match);
+
+static struct of_platform_driver sata_dwc_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = sata_dwc_match,
+ },
+ .probe = sata_dwc_probe,
+ .remove = sata_dwc_remove,
+};
+
+static int __init sata_dwc_init(void)
+{
+ return of_register_platform_driver(&sata_dwc_driver);
+}
+
+static void __exit sata_dwc_exit(void)
+{
+ of_unregister_platform_driver(&sata_dwc_driver);
+}
+
+module_init(sata_dwc_init);
+module_exit(sata_dwc_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mark Miesfeld <mmiesfeld@amcc.com>");
+MODULE_DESCRIPTION("DesignWare Cores SATA controller low lever driver");
+MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 4e4d42f1186a..7325f77480dc 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -1096,7 +1096,7 @@ static void sata_fsl_host_intr(struct ata_port *ap)
{
struct sata_fsl_host_priv *host_priv = ap->host->private_data;
void __iomem *hcr_base = host_priv->hcr_base;
- u32 hstatus, qc_active = 0;
+ u32 hstatus, done_mask = 0;
struct ata_queued_cmd *qc;
u32 SError;
@@ -1116,28 +1116,28 @@ static void sata_fsl_host_intr(struct ata_port *ap)
}
/* Read command completed register */
- qc_active = ioread32(hcr_base + CC);
+ done_mask = ioread32(hcr_base + CC);
VPRINTK("Status of all queues :\n");
- VPRINTK("qc_active/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n",
- qc_active,
+ VPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x,CQ=0x%x,apqa=0x%x\n",
+ done_mask,
ioread32(hcr_base + CA),
ioread32(hcr_base + CE),
ioread32(hcr_base + CQ),
ap->qc_active);
- if (qc_active & ap->qc_active) {
+ if (done_mask & ap->qc_active) {
int i;
/* clear CC bit, this will also complete the interrupt */
- iowrite32(qc_active, hcr_base + CC);
+ iowrite32(done_mask, hcr_base + CC);
DPRINTK("Status of all queues :\n");
- DPRINTK("qc_active/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
- qc_active, ioread32(hcr_base + CA),
+ DPRINTK("done_mask/CC = 0x%x, CA = 0x%x, CE=0x%x\n",
+ done_mask, ioread32(hcr_base + CA),
ioread32(hcr_base + CE));
for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
- if (qc_active & (1 << i)) {
+ if (done_mask & (1 << i)) {
qc = ata_qc_from_tag(ap, i);
if (qc) {
ata_qc_complete(qc);
@@ -1164,7 +1164,7 @@ static void sata_fsl_host_intr(struct ata_port *ap)
/* Spurious Interrupt!! */
DPRINTK("spurious interrupt!!, CC = 0x%x\n",
ioread32(hcr_base + CC));
- iowrite32(qc_active, hcr_base + CC);
+ iowrite32(done_mask, hcr_base + CC);
return;
}
}
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index a476cd99b95d..9463c71dd38e 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2716,34 +2716,35 @@ static void mv_err_intr(struct ata_port *ap)
static void mv_process_crpb_response(struct ata_port *ap,
struct mv_crpb *response, unsigned int tag, int ncq_enabled)
{
+ u8 ata_status;
+ u16 edma_status = le16_to_cpu(response->flags);
struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag);
- if (qc) {
- u8 ata_status;
- u16 edma_status = le16_to_cpu(response->flags);
- /*
- * edma_status from a response queue entry:
- * LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only).
- * MSB is saved ATA status from command completion.
- */
- if (!ncq_enabled) {
- u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV;
- if (err_cause) {
- /*
- * Error will be seen/handled by mv_err_intr().
- * So do nothing at all here.
- */
- return;
- }
- }
- ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
- if (!ac_err_mask(ata_status))
- ata_qc_complete(qc);
- /* else: leave it for mv_err_intr() */
- } else {
+ if (unlikely(!qc)) {
ata_port_printk(ap, KERN_ERR, "%s: no qc for tag=%d\n",
__func__, tag);
+ return;
+ }
+
+ /*
+ * edma_status from a response queue entry:
+ * LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only).
+ * MSB is saved ATA status from command completion.
+ */
+ if (!ncq_enabled) {
+ u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV;
+ if (err_cause) {
+ /*
+ * Error will be seen/handled by
+ * mv_err_intr(). So do nothing at all here.
+ */
+ return;
+ }
}
+ ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
+ if (!ac_err_mask(ata_status))
+ ata_qc_complete(qc);
+ /* else: leave it for mv_err_intr() */
}
static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp)
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 21161136cad0..cb89ef8d99d9 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1018,7 +1018,7 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
NV_ADMA_STAT_CPBERR |
NV_ADMA_STAT_CMD_COMPLETE)) {
u32 check_commands = notifier_clears[i];
- int pos, error = 0;
+ int pos, rc;
if (status & NV_ADMA_STAT_CPBERR) {
/* check all active commands */
@@ -1030,10 +1030,12 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
}
/* check CPBs for completed commands */
- while ((pos = ffs(check_commands)) && !error) {
+ while ((pos = ffs(check_commands))) {
pos--;
- error = nv_adma_check_cpb(ap, pos,
+ rc = nv_adma_check_cpb(ap, pos,
notifier_error & (1 << pos));
+ if (unlikely(rc))
+ check_commands = 0;
check_commands &= ~(1 << pos);
}
}
@@ -2129,7 +2131,6 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
struct nv_swncq_port_priv *pp = ap->private_data;
struct ata_eh_info *ehi = &ap->link.eh_info;
u32 sactive;
- int nr_done = 0;
u32 done_mask;
int i;
u8 host_stat;
@@ -2170,22 +2171,21 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
pp->dhfis_bits &= ~(1 << i);
pp->dmafis_bits &= ~(1 << i);
pp->sdbfis_bits |= (1 << i);
- nr_done++;
}
}
if (!ap->qc_active) {
DPRINTK("over\n");
nv_swncq_pp_reinit(ap);
- return nr_done;
+ return 0;
}
if (pp->qc_active & pp->dhfis_bits)
- return nr_done;
+ return 0;
if ((pp->ncq_flags & ncq_saw_backout) ||
(pp->qc_active ^ pp->dhfis_bits))
- /* if the controller cann't get a device to host register FIS,
+ /* if the controller can't get a device to host register FIS,
* The driver needs to reissue the new command.
*/
lack_dhfis = 1;
@@ -2202,7 +2202,7 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
if (lack_dhfis) {
qc = ata_qc_from_tag(ap, pp->last_issue_tag);
nv_swncq_issue_atacmd(ap, qc);
- return nr_done;
+ return 0;
}
if (pp->defer_queue.defer_bits) {
@@ -2212,7 +2212,7 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
nv_swncq_issue_atacmd(ap, qc);
}
- return nr_done;
+ return 0;
}
static inline u32 nv_swncq_tag(struct ata_port *ap)
@@ -2224,7 +2224,7 @@ static inline u32 nv_swncq_tag(struct ata_port *ap)
return (tag & 0x1f);
}
-static int nv_swncq_dmafis(struct ata_port *ap)
+static void nv_swncq_dmafis(struct ata_port *ap)
{
struct ata_queued_cmd *qc;
unsigned int rw;
@@ -2239,7 +2239,7 @@ static int nv_swncq_dmafis(struct ata_port *ap)
qc = ata_qc_from_tag(ap, tag);
if (unlikely(!qc))
- return 0;
+ return;
rw = qc->tf.flags & ATA_TFLAG_WRITE;
@@ -2254,8 +2254,6 @@ static int nv_swncq_dmafis(struct ata_port *ap)
dmactl |= ATA_DMA_WR;
iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-
- return 1;
}
static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
@@ -2265,7 +2263,6 @@ static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
struct ata_eh_info *ehi = &ap->link.eh_info;
u32 serror;
u8 ata_stat;
- int rc = 0;
ata_stat = ap->ops->sff_check_status(ap);
nv_swncq_irq_clear(ap, fis);
@@ -2310,8 +2307,7 @@ static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
"dhfis 0x%X dmafis 0x%X sactive 0x%X\n",
ap->print_id, pp->qc_active, pp->dhfis_bits,
pp->dmafis_bits, readl(pp->sactive_block));
- rc = nv_swncq_sdbfis(ap);
- if (rc < 0)
+ if (nv_swncq_sdbfis(ap) < 0)
goto irq_error;
}
@@ -2348,7 +2344,7 @@ static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
*/
pp->dmafis_bits |= (0x1 << nv_swncq_tag(ap));
pp->ncq_flags |= ncq_saw_dmas;
- rc = nv_swncq_dmafis(ap);
+ nv_swncq_dmafis(ap);
}
irq_exit:
generated by cgit v1.2.3 (git 2.0.4) at 2024-10-30 03:31:18 +0000