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USB: serial: mos7840: clean up device-type handling
The current device-type detection is fragile and can't really be relied upon. Instead of sprinkling device-id conditionals throughout the driver, let's use the device-id table to encode the number of ports and whether the device has a driver-controlled activity LED (MCS7810). Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold
parent
92fe35fb9c
commit
375cb533c0
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@ -89,17 +89,10 @@
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/* For higher baud Rates use TIOCEXBAUD */
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#define TIOCEXBAUD 0x5462
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/* vendor id and device id defines */
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/* The native mos7840/7820 component */
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#define USB_VENDOR_ID_MOSCHIP 0x9710
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#define MOSCHIP_DEVICE_ID_7840 0x7840
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#define MOSCHIP_DEVICE_ID_7843 0x7843
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#define MOSCHIP_DEVICE_ID_7820 0x7820
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#define MOSCHIP_DEVICE_ID_7810 0x7810
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/* The native component can have its vendor/device id's overridden
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* in vendor-specific implementations. Such devices can be handled
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* by making a change here, in id_table.
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/*
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* Vendor id and device id defines
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*
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* NOTE: Do not add new defines, add entries directly to the id_table instead.
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*/
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#define USB_VENDOR_ID_BANDB 0x0856
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#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
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@ -116,18 +109,6 @@
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#define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
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#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
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/* This driver also supports
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* ATEN UC2324 device using Moschip MCS7840
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* ATEN UC2322 device using Moschip MCS7820
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* MOXA UPort 2210 device using Moschip MCS7820
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*/
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#define USB_VENDOR_ID_ATENINTL 0x0557
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#define ATENINTL_DEVICE_ID_UC2324 0x2011
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#define ATENINTL_DEVICE_ID_UC2322 0x7820
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#define USB_VENDOR_ID_MOXA 0x110a
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#define MOXA_DEVICE_ID_2210 0x2210
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/* Interrupt Routine Defines */
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#define SERIAL_IIR_RLS 0x06
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@ -179,27 +160,34 @@ enum mos7840_flag {
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MOS7840_FLAG_LED_BUSY,
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};
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#define MCS_PORT_MASK GENMASK(2, 0)
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#define MCS_PORTS(nr) ((nr) & MCS_PORT_MASK)
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#define MCS_LED BIT(3)
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#define MCS_DEVICE(vid, pid, flags) \
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USB_DEVICE((vid), (pid)), .driver_info = (flags)
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static const struct usb_device_id id_table[] = {
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7843)},
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
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{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
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{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
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{USB_DEVICE(USB_VENDOR_ID_MOXA, MOXA_DEVICE_ID_2210)},
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{ MCS_DEVICE(0x0557, 0x2011, MCS_PORTS(4)) }, /* ATEN UC2324 */
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{ MCS_DEVICE(0x0557, 0x7820, MCS_PORTS(2)) }, /* ATEN UC2322 */
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{ MCS_DEVICE(0x110a, 0x2210, MCS_PORTS(2)) }, /* Moxa UPort 2210 */
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{ MCS_DEVICE(0x9710, 0x7810, MCS_PORTS(1) | MCS_LED) }, /* ASIX MCS7810 */
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{ MCS_DEVICE(0x9710, 0x7820, MCS_PORTS(2)) }, /* MosChip MCS7820 */
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{ MCS_DEVICE(0x9710, 0x7840, MCS_PORTS(4)) }, /* MosChip MCS7840 */
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{ MCS_DEVICE(0x9710, 0x7843, MCS_PORTS(3)) }, /* ASIX MCS7840 3 port */
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P) },
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{ USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4) },
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{} /* terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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@ -2024,22 +2012,12 @@ static int mos7810_check(struct usb_serial *serial)
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static int mos7840_probe(struct usb_serial *serial,
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const struct usb_device_id *id)
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{
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u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
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u16 vid = le16_to_cpu(serial->dev->descriptor.idVendor);
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unsigned long device_flags = id->driver_info;
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u8 *buf;
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int device_type;
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if (product == MOSCHIP_DEVICE_ID_7810 ||
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product == MOSCHIP_DEVICE_ID_7820 ||
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product == MOSCHIP_DEVICE_ID_7843) {
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device_type = product;
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/* Skip device-type detection if we already have device flags. */
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if (device_flags)
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goto out;
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}
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if (vid == USB_VENDOR_ID_MOXA && product == MOXA_DEVICE_ID_2210) {
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device_type = MOSCHIP_DEVICE_ID_7820;
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goto out;
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}
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buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
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if (!buf)
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@ -2051,15 +2029,15 @@ static int mos7840_probe(struct usb_serial *serial,
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/* For a MCS7840 device GPIO0 must be set to 1 */
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if (buf[0] & 0x01)
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device_type = MOSCHIP_DEVICE_ID_7840;
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device_flags = MCS_PORTS(4);
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else if (mos7810_check(serial))
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device_type = MOSCHIP_DEVICE_ID_7810;
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device_flags = MCS_PORTS(1) | MCS_LED;
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else
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device_type = MOSCHIP_DEVICE_ID_7820;
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device_flags = MCS_PORTS(2);
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kfree(buf);
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out:
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usb_set_serial_data(serial, (void *)(unsigned long)device_type);
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usb_set_serial_data(serial, (void *)device_flags);
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return 0;
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}
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@ -2067,19 +2045,10 @@ static int mos7840_probe(struct usb_serial *serial,
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static int mos7840_calc_num_ports(struct usb_serial *serial,
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struct usb_serial_endpoints *epds)
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{
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int device_type = (unsigned long)usb_get_serial_data(serial);
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int num_ports;
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unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
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int num_ports = MCS_PORTS(device_flags);
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if (device_type == MOSCHIP_DEVICE_ID_7843)
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num_ports = 3;
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else
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num_ports = (device_type >> 4) & 0x000F;
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/*
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* num_ports is currently never zero as device_type is one of
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* MOSCHIP_DEVICE_ID_78{1,2,4}0.
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*/
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if (num_ports == 0)
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if (num_ports == 0 || num_ports > 4)
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return -ENODEV;
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if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) {
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@ -2093,7 +2062,7 @@ static int mos7840_calc_num_ports(struct usb_serial *serial,
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static int mos7840_port_probe(struct usb_serial_port *port)
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{
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struct usb_serial *serial = port->serial;
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int device_type = (unsigned long)usb_get_serial_data(serial);
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unsigned long device_flags = (unsigned long)usb_get_serial_data(serial);
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struct moschip_port *mos7840_port;
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int status;
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int pnum;
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@ -2255,12 +2224,10 @@ static int mos7840_port_probe(struct usb_serial_port *port)
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goto error;
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}
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mos7840_port->has_led = false;
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mos7840_port->has_led = device_flags & MCS_LED;
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/* Initialize LED timers */
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if (device_type == MOSCHIP_DEVICE_ID_7810) {
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mos7840_port->has_led = true;
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if (mos7840_port->has_led) {
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mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
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mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
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GFP_KERNEL);
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