Serial boards made by RTD using the Exar XR17V358 chip rely on the extra capabilities of the Exar-provided driver to allow configuration of the board. When support for the Exar chip was added to the kernel 8250_pci driver, this then prevented easy use of the board by customers for anything other than standard serial usage in RS232 mode.
This patch prevents RTD sub-vendor boards from being bound by the 8250_pci driver, if it uses the XR17V358 chip. Other RTD boards using Exar chips are not affected. Signed-off-by Rob Groner <[email protected]> --- drivers/tty/serial/8250/8250_pci.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 68042dd..89baf7f 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -359,6 +359,16 @@ static void pci_ni8430_exit(struct pci_dev *dev) iounmap(p); } +/* + * RTD Embedded Technologies, Inc. boards + * Prevent from being bound to 8250 driver + */ +static int +pci_xr17v35x_rtd_probe(struct pci_dev *dev) +{ + return -ENODEV; +} + /* SBS Technologies Inc. PMC-OCTPRO and P-OCTAL cards */ static int sbs_setup(struct serial_private *priv, const struct pciserial_board *board, @@ -2105,6 +2115,8 @@ pci_wch_ch38x_setup(struct serial_private *priv, #define PCI_DEVICE_ID_PERICOM_PI7C9X7954 0x7954 #define PCI_DEVICE_ID_PERICOM_PI7C9X7958 0x7958 +#define PCI_SUBVENDOR_ID_RTD 0x1435 + /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 #define PCI_SUBDEVICE_ID_UNKNOWN_0x1588 0x1588 @@ -2608,6 +2620,14 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { { .vendor = PCI_VENDOR_ID_EXAR, .device = PCI_DEVICE_ID_EXAR_XR17V358, + .subvendor = PCI_SUBVENDOR_ID_RTD, + .subdevice = PCI_ANY_ID, + .probe = pci_xr17v35x_rtd_probe, + .setup = pci_xr17v35x_setup, + }, + { + .vendor = PCI_VENDOR_ID_EXAR, + .device = PCI_DEVICE_ID_EXAR_XR17V358, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .setup = pci_xr17v35x_setup, -- 1.9.1 _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
