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From 95d698869b404772cc8b72560df71548491c10bc Mon Sep 17 00:00:00 2001
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From: Andrew Davis <afd@ti.com>
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Date: Thu, 20 Apr 2023 11:02:09 -0500
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Subject: [PATCH] serial: 8250_exar: Add support for USR298x PCI Modems
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Git-commit: 95d698869b404772cc8b72560df71548491c10bc
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Patch-mainline: v6.4-rc3
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References: git-fixes
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Possibly the last PCI controller-based (i.e. not a soft/winmodem)
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dial-up modem one can still buy.
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Looks to have a stock XR17C154 PCI UART chip for communication, but for
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some reason when provisioning the PCI IDs they swapped the vendor and
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subvendor IDs. Otherwise this card would have worked out of the box.
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Searching online, some folks seem to not have this issue and others do,
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so it is possible only some batches of cards have this error.
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Create a new macro to handle the switched IDs and add support here.
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Signed-off-by: Andrew Davis <afd@ti.com>
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Cc: stable <stable@kernel.org>
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Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Link: https://lore.kernel.org/r/20230420160209.28221-1-afd@ti.com
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Acked-by: Takashi Iwai <tiwai@suse.de>
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---
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drivers/tty/serial/8250/8250_exar.c | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
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index 64770c62bbec..b406cba10b0e 100644
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--- a/drivers/tty/serial/8250/8250_exar.c
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+++ b/drivers/tty/serial/8250/8250_exar.c
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@@ -40,9 +40,13 @@
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#define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020
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#define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021
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#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0022
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+
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#define PCI_DEVICE_ID_EXAR_XR17V4358 0x4358
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#define PCI_DEVICE_ID_EXAR_XR17V8358 0x8358
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+#define PCI_SUBDEVICE_ID_USR_2980 0x0128
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+#define PCI_SUBDEVICE_ID_USR_2981 0x0129
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+
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#define PCI_DEVICE_ID_SEALEVEL_710xC 0x1001
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#define PCI_DEVICE_ID_SEALEVEL_720xC 0x1002
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#define PCI_DEVICE_ID_SEALEVEL_740xC 0x1004
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@@ -829,6 +833,15 @@ static const struct exar8250_board pbn_exar_XR17V8358 = {
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(kernel_ulong_t)&bd \
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}
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+#define USR_DEVICE(devid, sdevid, bd) { \
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+ PCI_DEVICE_SUB( \
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+ PCI_VENDOR_ID_USR, \
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+ PCI_DEVICE_ID_EXAR_##devid, \
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+ PCI_VENDOR_ID_EXAR, \
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+ PCI_SUBDEVICE_ID_USR_##sdevid), 0, 0, \
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+ (kernel_ulong_t)&bd \
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+ }
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+
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static const struct pci_device_id exar_pci_tbl[] = {
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EXAR_DEVICE(ACCESSIO, COM_2S, pbn_exar_XR17C15x),
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EXAR_DEVICE(ACCESSIO, COM_4S, pbn_exar_XR17C15x),
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@@ -853,6 +866,10 @@ static const struct pci_device_id exar_pci_tbl[] = {
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IBM_DEVICE(XR17C152, SATURN_SERIAL_ONE_PORT, pbn_exar_ibm_saturn),
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+ /* USRobotics USR298x-OEM PCI Modems */
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+ USR_DEVICE(XR17C152, 2980, pbn_exar_XR17C15x),
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+ USR_DEVICE(XR17C152, 2981, pbn_exar_XR17C15x),
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+
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/* Exar Corp. XR17C15[248] Dual/Quad/Octal UART */
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EXAR_DEVICE(EXAR, XR17C152, pbn_exar_XR17C15x),
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EXAR_DEVICE(EXAR, XR17C154, pbn_exar_XR17C15x),
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--
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2.35.3
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