serial: 8250_pci: Add MKS Tenta SCOM-0800 and SCOM-0801 cards

The MKS Instruments SCOM-0800 and SCOM-0801 cards (originally by Tenta
Technologies) are 3U CompactPCI serial cards with 4 and 8 serial ports,
respectively.  The first 4 ports are implemented by an OX16PCI954 chip,
and the second 4 ports are implemented by an OX16C954 chip on a local
bus, bridged by the second PCI function of the OX16PCI954.  The ports
are jumper-selectable as RS-232 and RS-422/485, and the UARTs use a
non-standard oscillator frequency of 20 MHz (base_baud = 1250000).

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 3eb638c35ba1b00cb25847f6d2a736c13c6802a2..0b63109d8750a181de78ba4ec14ff8c02368e2d4 100644 (file)
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -2577,6 +2577,8 @@ enum pci_board_num_t {
        pbn_b0_4_1152000_200,
        pbn_b0_8_1152000_200,
 
+       pbn_b0_4_1250000,
+
        pbn_b0_2_1843200,
        pbn_b0_4_1843200,
 
@@ -2799,6 +2801,13 @@ static struct pciserial_board pci_boards[] = {
                .uart_offset    = 0x200,
        },
 
+       [pbn_b0_4_1250000] = {
+               .flags          = FL_BASE0,
+               .num_ports      = 4,
+               .base_baud      = 1250000,
+               .uart_offset    = 8,
+       },
+
        [pbn_b0_2_1843200] = {
                .flags          = FL_BASE0,
                .num_ports      = 2,
@@ -5264,6 +5273,10 @@ static struct pci_device_id serial_pci_tbl[] = {
        { PCI_DEVICE(0x1c29, 0x1108), .driver_data = pbn_fintek_8 },
        { PCI_DEVICE(0x1c29, 0x1112), .driver_data = pbn_fintek_12 },
 
+       /* MKS Tenta SCOM-080x serial cards */
+       { PCI_DEVICE(0x1601, 0x0800), .driver_data = pbn_b0_4_1250000 },
+       { PCI_DEVICE(0x1601, 0xa801), .driver_data = pbn_b0_4_1250000 },
+
        /*
         * These entries match devices with class COMMUNICATION_SERIAL,
         * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL