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Date:   Sat, 29 Aug 2020 11:05:39 +0200
From:   Aleksander Morgado <aleksander@...ksander.es>
To:     johan@...nel.org
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Aleksander Morgado <aleksander@...ksander.es>
Subject: [PATCH] USB: serial: option: add support for SIM7070/SIM7080/SIM7090 modules

These modules have 2 different USB layouts:

The default layout with PID 0x9205 (AT+CUSBSELNV=1) exposes 4 TTYs and
an ECM interface:

  T:  Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  6 Spd=480 MxCh= 0
  D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
  P:  Vendor=1e0e ProdID=9205 Rev=00.00
  S:  Manufacturer=SimTech, Incorporated
  S:  Product=SimTech SIM7080
  S:  SerialNumber=1234567890ABCDEF
  C:  #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
  I:  If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
  I:  If#=0x5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether

The purpose of each TTY is as follows:
 * ttyUSB0: DIAG/QCDM port.
 * ttyUSB1: GNSS data.
 * ttyUSB2: AT-capable port (control).
 * ttyUSB3: AT-capable port (data).

In the secondary layout with PID=0x9206 (AT+CUSBSELNV=86) the module
exposes 6 TTY ports:

  T:  Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  8 Spd=480 MxCh= 0
  D:  Ver= 2.00 Cls=02(commc) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
  P:  Vendor=1e0e ProdID=9206 Rev=00.00
  S:  Manufacturer=SimTech, Incorporated
  S:  Product=SimTech SIM7080
  S:  SerialNumber=1234567890ABCDEF
  C:  #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
  I:  If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option

The purpose of each TTY is as follows:
 * ttyUSB0: DIAG/QCDM port.
 * ttyUSB1: GNSS data.
 * ttyUSB2: AT-capable port (control).
 * ttyUSB3: QFLOG interface.
 * ttyUSB4: DAM interface.
 * ttyUSB5: AT-capable port (data).

Signed-off-by: Aleksander Morgado <aleksander@...ksander.es>
---
 drivers/usb/serial/option.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 89b3192af326..01c5b452c6ea 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1819,6 +1819,8 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },	/* Simcom SIM7500/SIM7600 MBIM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),	/* Simcom SIM7500/SIM7600 RNDIS mode */
 	  .driver_info = RSVD(7) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
 	  .driver_info = NCTRL(0) | NCTRL(1) | RSVD(4) },
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X220_X500D),
-- 
2.28.0

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