[SERIAL] add TP560 data/fax/modem support

Patch from Bjorn Helgaas

Claim Topic TP560 data/fax/voice modem.  This device reports as class 0x0780,
so we don't claim it by default:

        00:0d.0 Class 0780: 151f:0000
                Subsystem: 151f:0000
                Interrupt: pin A routed to IRQ 11
                Region 0: I/O ports at a400 [size=8]
        00: 1f 15 00 00 01 00 00 02 00 00 80 07 00 00 00 00
        10: 01 a4 00 00 00 00 00 00 00 00 00 00 00 00 00 00
        20: 00 00 00 00 00 00 00 00 00 00 00 00 1f 15 00 00
        30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 01 00 00

Some rc.serial scripts extract IRQ and I/O port information from
/proc/pci and stuff it into an unused port using setserial.  That
doesn't work reliably anymore because pci_enable_device() is never
called, so the IRQ may not be enabled.

Thanks to Evan Clarke for reporting and helping debug this problem.

Signed-off-by: Bjorn Helgaas

drivers/serial/8250_pci.c

@@ -2211,6 +2211,13 @@ static struct pci_device_id serial_pci_tbl[] = {
 		0,
 		0, pbn_exar_XR17C158 },
 
+	/*
+	 * Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke)
+	 */
+	{	PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_b0_1_115200 },
+
 	/*
 	 * These entries match devices with class COMMUNICATION_SERIAL,
 	 * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL

include/linux/pci_ids.h

@@ -1972,6 +1972,9 @@
 #define PCI_DEVICE_ID_BCM4401		0x4401
 #define PCI_DEVICE_ID_BCM4401B0		0x4402
 
+#define PCI_VENDOR_ID_TOPIC		0x151f
+#define PCI_DEVICE_ID_TOPIC_TP560	0x0000
+
 #define PCI_VENDOR_ID_ENE		0x1524
 #define PCI_DEVICE_ID_ENE_1211		0x1211
 #define PCI_DEVICE_ID_ENE_1225		0x1225