serial: 8250_pci: add Pericom PCIe Serial board Support (12d8:7952/4/8) - Chip PI7C9X7952/4/8

Signed-off-by: Angelo Butti <buttiangelo@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 4ea45c15388c..4697a514b80a 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1307,6 +1307,29 @@ static int pci_default_setup(struct serial_private *priv,
         return setup_port(priv, port, bar, offset, board->reg_shift);
 }
 
+static int pci_pericom_setup(struct serial_private *priv,
+                  const struct pciserial_board *board,
+                  struct uart_8250_port *port, int idx)
+{
+        unsigned int bar, offset = board->first_offset, maxnr;
+
+        bar = FL_GET_BASE(board->flags);
+        if (board->flags & FL_BASE_BARS)
+                bar += idx;
+        else
+                offset += idx * board->uart_offset;
+
+        maxnr = (pci_resource_len(priv->dev, bar) - board->first_offset) >>
+                (board->reg_shift + 3);
+
+        if (board->flags & FL_REGION_SZ_CAP && idx >= maxnr)
+                return 1;
+
+        port->port.uartclk = 14745600;
+
+        return setup_port(priv, port, bar, offset, board->reg_shift);
+}
+
 static int
 ce4100_serial_setup(struct serial_private *priv,
                   const struct pciserial_board *board,
@@ -2016,6 +2039,31 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .exit           = pci_plx9050_exit,
         },
         /*
+         * Pericom
+         */
+        {
+                .vendor         = 0x12d8,
+                .device         = 0x7952,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_pericom_setup,
+        },
+        {
+                .vendor         = 0x12d8,
+                .device         = 0x7954,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_pericom_setup,
+        },
+        {
+                .vendor         = 0x12d8,
+                .device         = 0x7958,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_pericom_setup,
+        },
+
+        /*
          * PLX
          */
         {