serial: 8250_pci: Add WCH384_8S 8 port serial device

Add PCI id for WCH384_8S 8 port PCI-E serial card.
because this card has so many ports, you may have
to check these two options before use it:
  CONFIG_SERIAL_8250_RUNTIME_UARTS
  CONFIG_SERIAL_8250_NR_UARTS

Signed-off-by: Du Huanpeng <u74147@gmail.com>
Link: https://lore.kernel.org/r/1598060848-27807-1-git-send-email-u74147@gmail.com
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 1a74d511b02a580bbbdf033e7d9269e78c602def..d8f43f23b5b00554635e80e43b20935ed4516e46 100644 (file)
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1776,6 +1776,39 @@ pci_wch_ch38x_setup(struct serial_private *priv,
        return pci_default_setup(priv, board, port, idx);
 }
 
+
+#define CH384_XINT_ENABLE_REG   0xEB
+#define CH384_XINT_ENABLE_BIT   0x02
+
+static int pci_wch_ch38x_init(struct pci_dev *dev)
+{
+       int max_port;
+       unsigned long iobase;
+
+
+       switch (dev->device) {
+       case 0x3853: /* 8 ports */
+               max_port = 8;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       iobase = pci_resource_start(dev, 0);
+       outb(CH384_XINT_ENABLE_BIT, iobase + CH384_XINT_ENABLE_REG);
+
+       return max_port;
+}
+
+static void pci_wch_ch38x_exit(struct pci_dev *dev)
+{
+       unsigned long iobase;
+
+       iobase = pci_resource_start(dev, 0);
+       outb(0x0, iobase + CH384_XINT_ENABLE_REG);
+}
+
+
 static int
 pci_sunix_setup(struct serial_private *priv,
                const struct pciserial_board *board,
@@ -1867,6 +1900,7 @@ pci_moxa_setup(struct serial_private *priv,
 #define PCIE_VENDOR_ID_WCH             0x1c00
 #define PCIE_DEVICE_ID_WCH_CH382_2S1P  0x3250
 #define PCIE_DEVICE_ID_WCH_CH384_4S    0x3470
+#define PCIE_DEVICE_ID_WCH_CH384_8S    0x3853
 #define PCIE_DEVICE_ID_WCH_CH382_2S    0x3253
 
 #define PCI_VENDOR_ID_ACCESIO                  0x494f
@@ -2642,6 +2676,16 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                .subdevice      = PCI_ANY_ID,
                .setup          = pci_wch_ch38x_setup,
        },
+       /* WCH CH384 8S card (16850 clone) */
+       {
+               .vendor         = PCIE_VENDOR_ID_WCH,
+               .device         = PCIE_DEVICE_ID_WCH_CH384_8S,
+               .subvendor      = PCI_ANY_ID,
+               .subdevice      = PCI_ANY_ID,
+               .init           = pci_wch_ch38x_init,
+               .exit           = pci_wch_ch38x_exit,
+               .setup          = pci_wch_ch38x_setup,
+       },
        /*
         * ASIX devices with FIFO bug
         */
@@ -2913,6 +2957,7 @@ enum pci_board_num_t {
        pbn_fintek_F81512A,
        pbn_wch382_2,
        pbn_wch384_4,
+       pbn_wch384_8,
        pbn_pericom_PI7C9X7951,
        pbn_pericom_PI7C9X7952,
        pbn_pericom_PI7C9X7954,
@@ -3650,6 +3695,13 @@ static struct pciserial_board pci_boards[] = {
                .uart_offset    = 8,
                .first_offset   = 0xC0,
        },
+       [pbn_wch384_8] = {
+               .flags          = FL_BASE0,
+               .num_ports      = 8,
+               .base_baud      = 115200,
+               .uart_offset    = 8,
+               .first_offset   = 0x00,
+       },
        /*
         * Pericom PI7C9X795[1248] Uno/Dual/Quad/Octal UART
         */
@@ -5566,6 +5618,10 @@ static const struct pci_device_id serial_pci_tbl[] = {
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0, pbn_wch384_4 },
 
+       {       PCIE_VENDOR_ID_WCH, PCIE_DEVICE_ID_WCH_CH384_8S,
+               PCI_ANY_ID, PCI_ANY_ID,
+               0, 0, pbn_wch384_8 },
+
        /* Fintek PCI serial cards */
        { PCI_DEVICE(0x1c29, 0x1104), .driver_data = pbn_fintek_4 },
        { PCI_DEVICE(0x1c29, 0x1108), .driver_data = pbn_fintek_8 },