[PATCH 02/11] ahci: Factor out PCI specifics from ahci_save_initial_config()

Anton Vorontsov
2010-03-03T17:19:53Z

Make ahci_save_initial_config() a bit more generic by introducing
force_port_map and mask_port_map arguments.

Move PCI stuff into ahci_pci_save_initial_config().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/ata/ahci.c | 66 +++++++++++++++++++++++++++++++++-------------------
1 files changed, 42 insertions(+), 24 deletions(-)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index fcf00ca..98c9c6a 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -826,6 +826,8 @@ static ssize_t ahci_show_port_cmd(struct device *dev,
* ahci_save_initial_config - Save and fixup initial config values
* @pdev: target PCI device
* @hpriv: host private area to store config values
+ * @force_port_map: force port map to a specified value
+ * @mask_port_map: mask out particular bits from port map
*
* Some registers containing configuration info might be setup by
* BIOS and might be cleared on reset. This function saves the
@@ -838,12 +840,13 @@ static ssize_t ahci_show_port_cmd(struct device *dev,
* None.
*/
static void ahci_save_initial_config(struct pci_dev *pdev,
- struct ahci_host_priv *hpriv)
+ struct ahci_host_priv *hpriv,
+ unsigned int force_port_map,
+ unsigned int mask_port_map)
{
void __iomem *mmio = hpriv->mmio;
u32 cap, cap2, vers, port_map;
int i;
- int mv;

/* make sure AHCI mode is enabled before accessing CAP */
ahci_enable_ahci(mmio);
@@ -893,32 +896,19 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
cap &= ~HOST_CAP_SNTF;
}

- if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361 &&
- port_map != 1) {
+ if (force_port_map && port_map != force_port_map) {
dev_printk(KERN_INFO, &pdev->dev,
- "JMB361 has only one port, port_map 0x%x -> 0x%x\n",
- port_map, 1);
- port_map = 1;
+ "forcing port_map 0x%x -> 0x%x\n",
+ port_map, force_port_map);
+ port_map = force_port_map;
}

- /*
- * Temporary Marvell 6145 hack: PATA port presence
- * is asserted through the standard AHCI port
- * presence register, as bit 4 (counting from 0)
- */
- if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
- if (pdev->device == 0x6121)
- mv = 0x3;
- else
- mv = 0xf;
+ if (mask_port_map) {
dev_printk(KERN_ERR, &pdev->dev,
- "MV_AHCI HACK: port_map %x -> %x\n",
+ "masking port_map 0x%x -> 0x%x\n",
port_map,
- port_map & mv);
- dev_printk(KERN_ERR, &pdev->dev,
- "Disabling your PATA port. Use the boot option 'ahci.marvell_enable=0' to avoid this.\n");
-
- port_map &= mv;
+ port_map & mask_port_map);
+ port_map &= mask_port_map;
}

/* cross check port_map and cap.n_ports */
@@ -957,6 +947,34 @@ static void ahci_save_initial_config(struct pci_dev *pdev,
hpriv->port_map = port_map;
}

+static void ahci_pci_save_initial_config(struct pci_dev *pdev,
+ struct ahci_host_priv *hpriv)
+{
+ unsigned int force_port_map = 0;
+ unsigned int mask_port_map = 0;
+
+ if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361) {
+ dev_info(&pdev->dev, "JMB361 has only one port\n");
+ force_port_map = 1;
+ }
+
+ /*
+ * Temporary Marvell 6145 hack: PATA port presence
+ * is asserted through the standard AHCI port
+ * presence register, as bit 4 (counting from 0)
+ */
+ if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
+ if (pdev->device == 0x6121)
+ mask_port_map = 0x3;
+ else
+ mask_port_map = 0xf;
+ dev_info(&pdev->dev,
+ "Disabling your PATA port. Use the boot option 'ahci.marvell_enable=0' to avoid this.\n");
+ }
+
+ ahci_save_initial_config(pdev, hpriv, force_port_map, mask_port_map);
+}
+
/**
* ahci_restore_initial_config - Restore initial config
* @host: target ATA host
@@ -3277,7 +3295,7 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
hpriv->mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];

/* save initial config */
- ahci_save_initial_config(pdev, hpriv);
+ ahci_pci_save_initial_config(pdev, hpriv);

/* prepare host */
if (hpriv->cap & HOST_CAP_NCQ) {
--
1.7.0