[SERIAL] support the Exsys EX-4055 4S four-port card

Tested by Wolfgang Denk with this device:

    00:0f.0 Network controller: PLX Technology, Inc. PCI <-> IOBus Bridge (rev 01)
        Subsystem: Exsys EX-4055 4S(16C550) RS-232
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Interrupt: pin A routed to IRQ 10
        Region 0: Memory at 80100000 (32-bit, non-prefetchable) [size=128]
        Region 1: I/O ports at 7080 [size=128]
        Region 2: I/O ports at 7400 [size=32]

    00:0f.0 Class 0280: 10b5:9050 (rev 01)
        Subsystem: d84d:4055

Results with this patch:

    Serial: 8250/16550 driver $Revision: 1.90 $ 32 ports, IRQ sharing enabled
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    PCI: Found IRQ 10 for device 0000:00:0f.0
    ttyS4 at I/O 0x7400 (irq = 10) is a 16550A
    ttyS5 at I/O 0x7408 (irq = 10) is a 16550A
    ttyS6 at I/O 0x7410 (irq = 10) is a 16550A
    ttyS7 at I/O 0x7418 (irq = 10) is a 16550A

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 25 insertions, 1 deletions

diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 0e21f583690e..5da61ebbac88 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -226,8 +226,10 @@ static int __devinit pci_plx9050_init(struct pci_dev *dev)
         }
 
         irq_config = 0x41;
-        if (dev->vendor == PCI_VENDOR_ID_PANACOM)
+        if (dev->vendor == PCI_VENDOR_ID_PANACOM ||
+            dev->subsystem_vendor == PCI_SUBVENDOR_ID_EXSYS) {
                 irq_config = 0x43;
+        }
         if ((dev->vendor == PCI_VENDOR_ID_PLX) &&
             (dev->device == PCI_DEVICE_ID_PLX_ROMULUS)) {
                 /*
@@ -664,6 +666,15 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
         {
                 .vendor         = PCI_VENDOR_ID_PLX,
                 .device         = PCI_DEVICE_ID_PLX_9050,
+                .subvendor      = PCI_SUBVENDOR_ID_EXSYS,
+                .subdevice      = PCI_SUBDEVICE_ID_EXSYS_4055,
+                .init           = pci_plx9050_init,
+                .setup          = pci_default_setup,
+                .exit           = __devexit_p(pci_plx9050_exit),
+        },
+        {
+                .vendor         = PCI_VENDOR_ID_PLX,
+                .device         = PCI_DEVICE_ID_PLX_9050,
                 .subvendor      = PCI_SUBVENDOR_ID_KEYSPAN,
                 .subdevice      = PCI_SUBDEVICE_ID_KEYSPAN_SX2,
                 .init           = pci_plx9050_init,
@@ -927,6 +938,7 @@ enum pci_board_num_t {
         pbn_panacom,
         pbn_panacom2,
         pbn_panacom4,
+        pbn_exsys_4055,
         pbn_plx_romulus,
         pbn_oxsemi,
         pbn_intel_i960,
@@ -1292,6 +1304,13 @@ static struct pciserial_board pci_boards[] __devinitdata = {
                 .reg_shift      = 7,
         },
 
+        [pbn_exsys_4055] = {
+                .flags          = FL_BASE2,
+                .num_ports      = 4,
+                .base_baud      = 115200,
+                .uart_offset    = 8,
+        },
+
         /* I think this entry is broken - the first_offset looks wrong --rmk */
         [pbn_plx_romulus] = {
                 .flags          = FL_BASE2,
@@ -1853,6 +1872,10 @@ static struct pci_device_id serial_pci_tbl[] = {
                 PCI_SUBVENDOR_ID_CHASE_PCIRAS,
                 PCI_SUBDEVICE_ID_CHASE_PCIRAS8, 0, 0, 
                 pbn_b2_8_460800 },
+        {       PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
+                PCI_SUBVENDOR_ID_EXSYS,
+                PCI_SUBDEVICE_ID_EXSYS_4055, 0, 0,
+                pbn_exsys_4055 },
         /*
          * Megawolf Romulus PCI Serial Card, from Mike Hudson
          * (Exoray@isys.ca)
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index f74ed9462475..ca0691c319ab 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2696,6 +2696,7 @@
 
 #define PCI_SUBVENDOR_ID_EXSYS          0xd84d
 #define PCI_SUBDEVICE_ID_EXSYS_4014     0x4014
+#define PCI_SUBDEVICE_ID_EXSYS_4055     0x4055
 
 #define PCI_VENDOR_ID_TIGERJET          0xe159
 #define PCI_DEVICE_ID_TIGERJET_300      0x0001