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-rw-r--r--drivers/ata/pata_pcmcia.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/ata/pata_pcmcia.c b/drivers/ata/pata_pcmcia.c
index 820332a7ec7..171da0aeb65 100644
--- a/drivers/ata/pata_pcmcia.c
+++ b/drivers/ata/pata_pcmcia.c
@@ -54,6 +54,39 @@ struct ata_pcmcia_info {
dev_node_t node;
};
+/**
+ * pcmcia_set_mode - PCMCIA specific mode setup
+ * @ap: Port
+ * @r_failed_dev: Return pointer for failed device
+ *
+ * Perform the tuning and setup of the devices and timings, which
+ * for PCMCIA is the same as any other controller. We wrap it however
+ * as we need to spot hardware with incorrect or missing master/slave
+ * decode, which alas is embarrassingly common in the PC world
+ */
+
+static int pcmcia_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev)
+{
+ struct ata_device *master = &ap->device[0];
+ struct ata_device *slave = &ap->device[1];
+
+ if (!ata_dev_enabled(master) || !ata_dev_enabled(slave))
+ return ata_do_set_mode(ap, r_failed_dev);
+
+ if (memcmp(master->id + ATA_ID_FW_REV, slave->id + ATA_ID_FW_REV,
+ ATA_ID_FW_REV_LEN + ATA_ID_PROD_LEN) == 0)
+ {
+ /* Suspicious match, but could be two cards from
+ the same vendor - check serial */
+ if (memcmp(master->id + ATA_ID_SERNO, slave->id + ATA_ID_SERNO,
+ ATA_ID_SERNO_LEN) == 0 && master->id[ATA_ID_SERNO] >> 8) {
+ ata_dev_printk(slave, KERN_WARNING, "is a ghost device, ignoring.\n");
+ ata_dev_disable(slave);
+ }
+ }
+ return ata_do_set_mode(ap, r_failed_dev);
+}
+
static struct scsi_host_template pcmcia_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
@@ -73,6 +106,7 @@ static struct scsi_host_template pcmcia_sht = {
};
static struct ata_port_operations pcmcia_port_ops = {
+ .set_mode = pcmcia_set_mode,
.port_disable = ata_port_disable,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,