sata_svw: Add support for HT1100 SATA controller

This patch adds support (including ATAPI DMA) for HT1100 (aka BCM11000) SATA controller.

Signed-off-by: Anantha Subramanyam <ananth@broadcom.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 63 insertions, 14 deletions

diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 69f651e0bc98..840d1c4a7850 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -45,6 +45,8 @@
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi.h>
 #include <linux/libata.h>
 
 #ifdef CONFIG_PPC_OF
@@ -59,6 +61,7 @@ enum {
         /* ap->flags bits */
         K2_FLAG_SATA_8_PORTS            = (1 << 24),
         K2_FLAG_NO_ATAPI_DMA            = (1 << 25),
+        K2_FLAG_BAR_POS_3                       = (1 << 26),
 
         /* Taskfile registers offsets */
         K2_SATA_TF_CMD_OFFSET           = 0x00,
@@ -88,8 +91,10 @@ enum {
         /* Port stride */
         K2_SATA_PORT_OFFSET             = 0x100,
 
-        board_svw4                      = 0,
-        board_svw8                      = 1,
+        chip_svw4                       = 0,
+        chip_svw8                       = 1,
+        chip_svw42                      = 2,    /* bar 3 */
+        chip_svw43                      = 3,    /* bar 5 */
 };
 
 static u8 k2_stat_check_status(struct ata_port *ap);
@@ -97,10 +102,25 @@ static u8 k2_stat_check_status(struct ata_port *ap);
 
 static int k2_sata_check_atapi_dma(struct ata_queued_cmd *qc)
 {
+        u8 cmnd = qc->scsicmd->cmnd[0];
+
         if (qc->ap->flags & K2_FLAG_NO_ATAPI_DMA)
                 return -1;      /* ATAPI DMA not supported */
+        else {
+                switch (cmnd) {
+                case READ_10:
+                case READ_12:
+                case READ_16:
+                case WRITE_10:
+                case WRITE_12:
+                case WRITE_16:
+                        return 0;
+
+                default:
+                        return -1;
+                }
 
-        return 0;
+        }
 }
 
 static int k2_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
@@ -354,7 +374,7 @@ static const struct ata_port_operations k2_sata_ops = {
 };
 
 static const struct ata_port_info k2_port_info[] = {
-        /* board_svw4 */
+        /* chip_svw4 */
         {
                 .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                   ATA_FLAG_MMIO | K2_FLAG_NO_ATAPI_DMA,
@@ -363,7 +383,7 @@ static const struct ata_port_info k2_port_info[] = {
                 .udma_mask      = ATA_UDMA6,
                 .port_ops       = &k2_sata_ops,
         },
-        /* board_svw8 */
+        /* chip_svw8 */
         {
                 .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
                                   ATA_FLAG_MMIO | K2_FLAG_NO_ATAPI_DMA |
@@ -373,6 +393,24 @@ static const struct ata_port_info k2_port_info[] = {
                 .udma_mask      = ATA_UDMA6,
                 .port_ops       = &k2_sata_ops,
         },
+        /* chip_svw42 */
+        {
+                .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
+                                  ATA_FLAG_MMIO | K2_FLAG_BAR_POS_3,
+                .pio_mask       = 0x1f,
+                .mwdma_mask     = 0x07,
+                .udma_mask      = ATA_UDMA6,
+                .port_ops       = &k2_sata_ops,
+        },
+        /* chip_svw43 */
+        {
+                .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
+                                  ATA_FLAG_MMIO,
+                .pio_mask       = 0x1f,
+                .mwdma_mask     = 0x07,
+                .udma_mask      = ATA_UDMA6,
+                .port_ops       = &k2_sata_ops,
+        },
 };
 
 static void k2_sata_setup_port(struct ata_ioports *port, void __iomem *base)
@@ -402,7 +440,7 @@ static int k2_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *en
                 { &k2_port_info[ent->driver_data], NULL };
         struct ata_host *host;
         void __iomem *mmio_base;
-        int n_ports, i, rc;
+        int n_ports, i, rc, bar_pos;
 
         if (!printed_version++)
                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
@@ -416,6 +454,9 @@ static int k2_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *en
         if (!host)
                 return -ENOMEM;
 
+        bar_pos = 5;
+        if (ppi[0]->flags & K2_FLAG_BAR_POS_3)
+                bar_pos = 3;
         /*
          * If this driver happens to only be useful on Apple's K2, then
          * we should check that here as it has a normal Serverworks ID
@@ -428,17 +469,23 @@ static int k2_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *en
          * Check if we have resources mapped at all (second function may
          * have been disabled by firmware)
          */
-        if (pci_resource_len(pdev, 5) == 0)
+        if (pci_resource_len(pdev, bar_pos) == 0) {
+                /* In IDE mode we need to pin the device to ensure that
+                        pcim_release does not clear the busmaster bit in config
+                        space, clearing causes busmaster DMA to fail on
+                        ports 3 & 4 */
+                pcim_pin_device(pdev);
                 return -ENODEV;
+        }
 
         /* Request and iomap PCI regions */
-        rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
+        rc = pcim_iomap_regions(pdev, 1 << bar_pos, DRV_NAME);
         if (rc == -EBUSY)
                 pcim_pin_device(pdev);
         if (rc)
                 return rc;
         host->iomap = pcim_iomap_table(pdev);
-        mmio_base = host->iomap[5];
+        mmio_base = host->iomap[bar_pos];
 
         /* different controllers have different number of ports - currently 4 or 8 */
         /* All ports are on the same function. Multi-function device is no
@@ -483,11 +530,13 @@ static int k2_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *en
  * controller
  * */
 static const struct pci_device_id k2_sata_pci_tbl[] = {
-        { PCI_VDEVICE(SERVERWORKS, 0x0240), board_svw4 },
-        { PCI_VDEVICE(SERVERWORKS, 0x0241), board_svw4 },
-        { PCI_VDEVICE(SERVERWORKS, 0x0242), board_svw8 },
-        { PCI_VDEVICE(SERVERWORKS, 0x024a), board_svw4 },
-        { PCI_VDEVICE(SERVERWORKS, 0x024b), board_svw4 },
+        { PCI_VDEVICE(SERVERWORKS, 0x0240), chip_svw4 },
+        { PCI_VDEVICE(SERVERWORKS, 0x0241), chip_svw4 },
+        { PCI_VDEVICE(SERVERWORKS, 0x0242), chip_svw8 },
+        { PCI_VDEVICE(SERVERWORKS, 0x024a), chip_svw4 },
+        { PCI_VDEVICE(SERVERWORKS, 0x024b), chip_svw4 },
+        { PCI_VDEVICE(SERVERWORKS, 0x0410), chip_svw42 },
+        { PCI_VDEVICE(SERVERWORKS, 0x0411), chip_svw43 },
 
         { }
 };