/* * USB FTDI SIO driver * * Copyright (C) 1999 - 2001 * Greg Kroah-Hartman (greg@kroah.com) * Bill Ryder (bryder@sgi.com) * Copyright (C) 2002 * Kuba Ober (kuba@mareimbrium.org) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * See Documentation/usb/usb-serial.txt for more information on using this driver * * See http://ftdi-usb-sio.sourceforge.net for upto date testing info * and extra documentation * * Change entries from 2004 and earlier can be found in versions of this * file in kernel versions prior to the 2.6.24 release. * */ /* Bill Ryder - bryder@sgi.com - wrote the FTDI_SIO implementation */ /* Thanx to FTDI for so kindly providing details of the protocol required */ /* to talk to the device */ /* Thanx to gkh and the rest of the usb dev group for all code I have assimilated :-) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ftdi_sio.h" /* * Version Information */ #define DRIVER_VERSION "v1.4.3" #define DRIVER_AUTHOR "Greg Kroah-Hartman , Bill Ryder , Kuba Ober " #define DRIVER_DESC "USB FTDI Serial Converters Driver" static int debug; static __u16 vendor = FTDI_VID; static __u16 product; struct ftdi_private { ftdi_chip_type_t chip_type; /* type of the device, either SIO or FT8U232AM */ int baud_base; /* baud base clock for divisor setting */ int custom_divisor; /* custom_divisor kludge, this is for baud_base (different from what goes to the chip!) */ __u16 last_set_data_urb_value ; /* the last data state set - needed for doing a break */ int write_offset; /* This is the offset in the usb data block to write the serial data - * it is different between devices */ int flags; /* some ASYNC_xxxx flags are supported */ unsigned long last_dtr_rts; /* saved modem control outputs */ wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ char prev_status, diff_status; /* Used for TIOCMIWAIT */ __u8 rx_flags; /* receive state flags (throttling) */ spinlock_t rx_lock; /* spinlock for receive state */ struct delayed_work rx_work; struct usb_serial_port *port; int rx_processed; unsigned long rx_bytes; __u16 interface; /* FT2232C port interface (0 for FT232/245) */ speed_t force_baud; /* if non-zero, force the baud rate to this value */ int force_rtscts; /* if non-zero, force RTS-CTS to always be enabled */ spinlock_t tx_lock; /* spinlock for transmit state */ unsigned long tx_bytes; unsigned long tx_outstanding_bytes; unsigned long tx_outstanding_urbs; }; /* struct ftdi_sio_quirk is used by devices requiring special attention. */ struct ftdi_sio_quirk { int (*probe)(struct usb_serial *); void (*port_probe)(struct ftdi_private *); /* Special settings for probed ports. */ }; static int ftdi_jtag_probe (struct usb_serial *serial); static int ftdi_mtxorb_hack_setup (struct usb_serial *serial); static void ftdi_USB_UIRT_setup (struct ftdi_private *priv); static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv); static struct ftdi_sio_quirk ftdi_jtag_quirk = { .probe = ftdi_jtag_probe, }; static struct ftdi_sio_quirk ftdi_mtxorb_hack_quirk = { .probe = ftdi_mtxorb_hack_setup, }; static struct ftdi_sio_quirk ftdi_USB_UIRT_quirk = { .port_probe = ftdi_USB_UIRT_setup, }; static struct ftdi_sio_quirk ftdi_HE_TIRA1_quirk = { .port_probe = ftdi_HE_TIRA1_setup, }; /* * The 8U232AM has the same API as the sio except for: * - it can support MUCH higher baudrates; up to: * o 921600 for RS232 and 2000000 for RS422/485 at 48MHz * o 230400 at 12MHz * so .. 8U232AM's baudrate setting codes are different * - it has a two byte status code. * - it returns characters every 16ms (the FTDI does it every 40ms) * * the bcdDevice value is used to differentiate FT232BM and FT245BM from * the earlier FT8U232AM and FT8U232BM. For now, include all known VID/PID * combinations in both tables. * FIXME: perhaps bcdDevice can also identify 12MHz FT8U232AM devices, * but I don't know if those ever went into mass production. [Ian Abbott] */ static struct usb_device_id id_table_combined [] = { { USB_DEVICE(FTDI_VID, FTDI_AMC232_PID) }, { USB_DEVICE(FTDI_VID, FTDI_CANUSB_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ACTZWAVE_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IRTRANS_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IPLUS_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IPLUS2_PID) }, { USB_DEVICE(FTDI_VID, FTDI_DMX4ALL) }, { USB_DEVICE(FTDI_VID, FTDI_SIO_PID) }, { USB_DEVICE(FTDI_VID, FTDI_8U232AM_PID) }, { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) }, { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) }, { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) }, { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) }, { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) }, { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_IOBOARD_PID) }, { USB_DEVICE(INTERBIOMETRICS_VID, INTERBIOMETRICS_MINI_IOBOARD_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_632_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_634_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_547_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_633_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_631_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_635_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_640_PID) }, { USB_DEVICE(FTDI_VID, FTDI_XF_642_PID) }, { USB_DEVICE(FTDI_VID, FTDI_DSS20_PID) }, { USB_DEVICE(FTDI_NF_RIC_VID, FTDI_NF_RIC_PID) }, { USB_DEVICE(FTDI_VID, FTDI_VNHCPCUSB_D_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_0_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_1_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_2_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_3_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_4_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_5_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) }, { USB_DEVICE(MTXORB_VK_VID, MTXORB_VK_PID), .driver_info = (kernel_ulong_t)&ftdi_mtxorb_hack_quirk }, { USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) }, { USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) }, { USB_DEVICE(FTDI_VID, FTDI_USBX_707_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2104_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2106_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2201_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2202_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2203_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_3_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2401_4_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_3_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2402_4_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_3_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2403_4_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_3_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_4_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_5_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_6_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_7_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2801_8_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_3_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_4_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_5_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_6_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_7_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2802_8_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_1_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_2_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_3_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_4_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_5_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_6_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_7_PID) }, { USB_DEVICE(SEALEVEL_VID, SEALEVEL_2803_8_PID) }, { USB_DEVICE(IDTECH_VID, IDTECH_IDT1221U_PID) }, { USB_DEVICE(OCT_VID, OCT_US101_PID) }, { USB_DEVICE(FTDI_VID, FTDI_HE_TIRA1_PID), .driver_info = (kernel_ulong_t)&ftdi_HE_TIRA1_quirk }, { USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID), .driver_info = (kernel_ulong_t)&ftdi_USB_UIRT_quirk }, { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_1) }, { USB_DEVICE(FTDI_VID, PROTEGO_R2X0) }, { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_3) }, { USB_DEVICE(FTDI_VID, PROTEGO_SPECIAL_4) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E808_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E809_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80A_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80B_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80C_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80D_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80E_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E80F_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E888_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E889_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88A_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88B_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88C_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88D_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88E_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GUDEADS_E88F_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UO100_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UM100_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UR100_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_ALC8500_PID) }, { USB_DEVICE(FTDI_VID, FTDI_PYRAMID_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1000PC_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_US485_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_PICPRO_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_PCMCIA_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_PK1_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_RS232MON_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_APP70_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_PEDO_PID) }, { USB_DEVICE(FTDI_VID, FTDI_IBS_PROD_PID) }, /* * Due to many user requests for multiple ELV devices we enable * them by default. */ { USB_DEVICE(FTDI_VID, FTDI_ELV_CLI7000_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_PPS7330_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_TFM100_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UDF77_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UIO88_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UAD8_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_UDA7_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_USI2_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_T1100_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_PCD200_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_ULA200_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_CSI8_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_EM1000DL_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_PCK100_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_RFP500_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_FS20SIG_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_WS300PC_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_FHZ1300PC_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELV_WS500_PID) }, { USB_DEVICE(FTDI_VID, LINX_SDMUSBQSS_PID) }, { USB_DEVICE(FTDI_VID, LINX_MASTERDEVEL2_PID) }, { USB_DEVICE(FTDI_VID, LINX_FUTURE_0_PID) }, { USB_DEVICE(FTDI_VID, LINX_FUTURE_1_PID) }, { USB_DEVICE(FTDI_VID, LINX_FUTURE_2_PID) }, { USB_DEVICE(FTDI_VID, FTDI_CCSICDU20_0_PID) }, { USB_DEVICE(FTDI_VID, FTDI_CCSICDU40_1_PID) }, { USB_DEVICE(FTDI_VID, FTDI_CCSMACHX_2_PID) }, { USB_DEVICE(FTDI_VID, INSIDE_ACCESSO) }, { USB_DEVICE(INTREPID_VID, INTREPID_VALUECAN_PID) }, { USB_DEVICE(INTREPID_VID, INTREPID_NEOVI_PID) }, { USB_DEVICE(FALCOM_VID, FALCOM_TWIST_PID) }, { USB_DEVICE(FALCOM_VID, FALCOM_SAMBA_PID) }, { USB_DEVICE(FTDI_VID, FTDI_SUUNTO_SPORTS_PID) }, { USB_DEVICE(TTI_VID, TTI_QL355P_PID) }, { USB_DEVICE(FTDI_VID, FTDI_RM_CANVIEW_PID) }, { USB_DEVICE(BANDB_VID, BANDB_USOTL4_PID) }, { USB_DEVICE(BANDB_VID, BANDB_USTL4_PID) }, { USB_DEVICE(BANDB_VID, BANDB_USO9ML2_PID) }, { USB_DEVICE(FTDI_VID, EVER_ECO_PRO_CDS) }, { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_1_PID) }, { USB_DEVICE(FTDI_VID, FTDI_4N_GALAXY_DE_2_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_0_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_1_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_2_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_3_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_4_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_5_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_6_PID) }, { USB_DEVICE(FTDI_VID, XSENS_CONVERTER_7_PID) }, { USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ACTIVE_ROBOTS_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_KW_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_YS_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y6_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y8_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_IC_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_DB9_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_RS232_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MHAM_Y9_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_VCP_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TERATRONIK_D2XX_PID) }, { USB_DEVICE(EVOLUTION_VID, EVOLUTION_ER1_PID) }, { USB_DEVICE(EVOLUTION_VID, EVO_HYBRID_PID) }, { USB_DEVICE(EVOLUTION_VID, EVO_RCM4_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ARTEMIS_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16C_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HR_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16HRC_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ATIK_ATK16IC_PID) }, { USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) }, { USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) }, { USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ECLO_COM_1WIRE_PID) }, { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_777_PID) }, { USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) }, { USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) }, { USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) }, { USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) }, { USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ACG_HFDUAL_PID) }, { USB_DEVICE(FTDI_VID, FTDI_YEI_SERVOCENTER31_PID) }, { USB_DEVICE(FTDI_VID, FTDI_THORLABS_PID) }, { USB_DEVICE(TESTO_VID, TESTO_USB_INTERFACE_PID) }, { USB_DEVICE(FTDI_VID, FTDI_GAMMA_SCOUT_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13M_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13S_PID) }, { USB_DEVICE(FTDI_VID, FTDI_TACTRIX_OPENPORT_13U_PID) }, { USB_DEVICE(ELEKTOR_VID, ELEKTOR_FT323R_PID) }, { USB_DEVICE(TELLDUS_VID, TELLDUS_TELLSTICK_PID) }, { USB_DEVICE(FTDI_VID, FTDI_MAXSTREAM_PID) }, { USB_DEVICE(TML_VID, TML_USB_SERIAL_PID) }, { USB_DEVICE(FTDI_VID, FTDI_ELSTER_UNICOM_PID) }, { USB_DEVICE(OLIMEX_VID, OLIMEX_ARM_USB_OCD_PID), .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk }, { USB_DEVICE(FIC_VID, FIC_NEO1973_DEBUG_PID), .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk }, { USB_DEVICE(FTDI_VID, FTDI_OOCDLINK_PID), .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk }, { }, /* Optional parameter entry */ { } /* Terminating entry */ }; MODULE_DEVICE_TABLE (usb, id_table_combined); static struct usb_driver ftdi_driver = { .name = "ftdi_sio", .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table_combined, .no_dynamic_id = 1, }; static const char *ftdi_chip_name[] = { [SIO] = "SIO", /* the serial part of FT8U100AX */ [FT8U232AM] = "FT8U232AM", [FT232BM] = "FT232BM", [FT2232C] = "FT2232C", [FT232RL] = "FT232RL", }; /* Constants for read urb and write urb */ #define BUFSZ 512 #define PKTSZ 64 /* rx_flags */ #define THROTTLED 0x01 #define ACTUALLY_THROTTLED 0x02 /* Used for TIOCMIWAIT */ #define FTDI_STATUS_B0_MASK (FTDI_RS0_CTS | FTDI_RS0_DSR | FTDI_RS0_RI | FTDI_RS0_RLSD) #define FTDI_STATUS_B1_MASK (FTDI_RS_BI) /* End TIOCMIWAIT */ #define FTDI_IMPL_ASYNC_FLAGS = (ASYNC_SPD_HI | ASYNC_SPD_VHI \ | ASYNC_SPD_CUST | ASYNC_SPD_SHI | ASYNC_SPD_WARP) /* function prototypes for a FTDI serial converter */ static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id); static void ftdi_shutdown (struct usb_serial *serial); static int ftdi_sio_port_probe (struct usb_serial_port *port); static int ftdi_sio_port_remove (struct usb_serial_port *port); static int ftdi_open (struct usb_serial_port *port, struct file *filp); static void ftdi_close (struct usb_serial_port *port, struct file *filp); static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count); static int ftdi_write_room (struct usb_serial_port *port); static int ftdi_chars_in_buffer (struct usb_serial_port *port); static void ftdi_write_bulk_callback (struct urb *urb); static void ftdi_read_bulk_callback (struct urb *urb); static void ftdi_process_read (struct work_struct *work); static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios * old); static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file); static int ftdi_tiocmset (struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear); static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); static void ftdi_break_ctl (struct usb_serial_port *port, int break_state ); static void ftdi_throttle (struct usb_serial_port *port); static void ftdi_unthrottle (struct usb_serial_port *port); static unsigned short int ftdi_232am_baud_base_to_divisor (int baud, int base); static unsigned short int ftdi_232am_baud_to_divisor (int baud); static __u32 ftdi_232bm_baud_base_to_divisor (int baud, int base); static __u32 ftdi_232bm_baud_to_divisor (int baud); static struct usb_serial_driver ftdi_sio_device = { .driver = { .owner = THIS_MODULE, .name = "ftdi_sio", }, .description = "FTDI USB Serial Device", .usb_driver = &ftdi_driver , .id_table = id_table_combined, .num_interrupt_in = 0, .num_bulk_in = 1, .num_bulk_out = 1, .num_ports = 1, .probe = ftdi_sio_probe, .port_probe = ftdi_sio_port_probe, .port_remove = ftdi_sio_port_remove, .open = ftdi_open, .close = ftdi_close, .throttle = ftdi_throttle, .unthrottle = ftdi_unthrottle, .write = ftdi_write, .write_room = ftdi_write_room, .chars_in_buffer = ftdi_chars_in_buffer, .read_bulk_callback = ftdi_read_bulk_callback, .write_bulk_callback = ftdi_write_bulk_callback, .tiocmget = ftdi_tiocmget, .tiocmset = ftdi_tiocmset, .ioctl = ftdi_ioctl, .set_termios = ftdi_set_termios, .break_ctl = ftdi_break_ctl, .shutdown = ftdi_shutdown, }; #define WDR_TIMEOUT 5000 /* default urb timeout */ #define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */ /* High and low are for DTR, RTS etc etc */ #define HIGH 1 #define LOW 0 /* number of outstanding urbs to prevent userspace DoS from happening */ #define URB_UPPER_LIMIT 42 /* * *************************************************************************** * Utility functions * *************************************************************************** */ static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base) { unsigned short int divisor; int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left if ((divisor3 & 0x7) == 7) divisor3 ++; // round x.7/8 up to x+1 divisor = divisor3 >> 3; divisor3 &= 0x7; if (divisor3 == 1) divisor |= 0xc000; else // 0.125 if (divisor3 >= 4) divisor |= 0x4000; else // 0.5 if (divisor3 != 0) divisor |= 0x8000; // 0.25 if (divisor == 1) divisor = 0; /* special case for maximum baud rate */ return divisor; } static unsigned short int ftdi_232am_baud_to_divisor(int baud) { return(ftdi_232am_baud_base_to_divisor(baud, 48000000)); } static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base) { static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; __u32 divisor; int divisor3 = base / 2 / baud; // divisor shifted 3 bits to the left divisor = divisor3 >> 3; divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; /* Deal with special cases for highest baud rates. */ if (divisor == 1) divisor = 0; else // 1.0 if (divisor == 0x4001) divisor = 1; // 1.5 return divisor; } static __u32 ftdi_232bm_baud_to_divisor(int baud) { return(ftdi_232bm_baud_base_to_divisor(baud, 48000000)); } #define set_mctrl(port, set) update_mctrl((port), (set), 0) #define clear_mctrl(port, clear) update_mctrl((port), 0, (clear)) static int update_mctrl(struct usb_serial_port *port, unsigned int set, unsigned int clear) { struct ftdi_private *priv = usb_get_serial_port_data(port); char *buf; unsigned urb_value; int rv; if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) { dbg("%s - DTR|RTS not being set|cleared", __FUNCTION__); return 0; /* no change */ } buf = kmalloc(1, GFP_NOIO); if (!buf) { return -ENOMEM; } clear &= ~set; /* 'set' takes precedence over 'clear' */ urb_value = 0; if (clear & TIOCM_DTR) urb_value |= FTDI_SIO_SET_DTR_LOW; if (clear & TIOCM_RTS) urb_value |= FTDI_SIO_SET_RTS_LOW; if (set & TIOCM_DTR) urb_value |= FTDI_SIO_SET_DTR_HIGH; if (set & TIOCM_RTS) urb_value |= FTDI_SIO_SET_RTS_HIGH; rv = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_MODEM_CTRL_REQUEST, FTDI_SIO_SET_MODEM_CTRL_REQUEST_TYPE, urb_value, priv->interface, buf, 0, WDR_TIMEOUT); kfree(buf); if (rv < 0) { err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s", __FUNCTION__, (set & TIOCM_DTR) ? "HIGH" : (clear & TIOCM_DTR) ? "LOW" : "unchanged", (set & TIOCM_RTS) ? "HIGH" : (clear & TIOCM_RTS) ? "LOW" : "unchanged"); } else { dbg("%s - DTR %s, RTS %s", __FUNCTION__, (set & TIOCM_DTR) ? "HIGH" : (clear & TIOCM_DTR) ? "LOW" : "unchanged", (set & TIOCM_RTS) ? "HIGH" : (clear & TIOCM_RTS) ? "LOW" : "unchanged"); priv->last_dtr_rts = (priv->last_dtr_rts & ~clear) | set; } return rv; } static __u32 get_ftdi_divisor(struct usb_serial_port * port); static int change_speed(struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); char *buf; __u16 urb_value; __u16 urb_index; __u32 urb_index_value; int rv; buf = kmalloc(1, GFP_NOIO); if (!buf) return -ENOMEM; urb_index_value = get_ftdi_divisor(port); urb_value = (__u16)urb_index_value; urb_index = (__u16)(urb_index_value >> 16); if (priv->interface) { /* FT2232C */ urb_index = (__u16)((urb_index << 8) | priv->interface); } rv = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_BAUDRATE_REQUEST, FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE, urb_value, urb_index, buf, 0, WDR_SHORT_TIMEOUT); kfree(buf); return rv; } static __u32 get_ftdi_divisor(struct usb_serial_port * port) { /* get_ftdi_divisor */ struct ftdi_private *priv = usb_get_serial_port_data(port); __u32 div_value = 0; int div_okay = 1; int baud; /* * The logic involved in setting the baudrate can be cleanly split in 3 steps. * Obtaining the actual baud rate is a little tricky since unix traditionally * somehow ignored the possibility to set non-standard baud rates. * 1. Standard baud rates are set in tty->termios->c_cflag * 2. If these are not enough, you can set any speed using alt_speed as follows: * - set tty->termios->c_cflag speed to B38400 * - set your real speed in tty->alt_speed; it gets ignored when * alt_speed==0, (or) * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: * flags & ASYNC_SPD_MASK == ASYNC_SPD_[HI, VHI, SHI, WARP], this just * sets alt_speed to (HI: 57600, VHI: 115200, SHI: 230400, WARP: 460800) * ** Steps 1, 2 are done courtesy of tty_get_baud_rate * 3. You can also set baud rate by setting custom divisor as follows * - set tty->termios->c_cflag speed to B38400 * - call TIOCSSERIAL ioctl with (struct serial_struct) set as follows: * o flags & ASYNC_SPD_MASK == ASYNC_SPD_CUST * o custom_divisor set to baud_base / your_new_baudrate * ** Step 3 is done courtesy of code borrowed from serial.c - I should really * spend some time and separate+move this common code to serial.c, it is * replicated in nearly every serial driver you see. */ /* 1. Get the baud rate from the tty settings, this observes alt_speed hack */ baud = tty_get_baud_rate(port->tty); dbg("%s - tty_get_baud_rate reports speed %d", __FUNCTION__, baud); /* 2. Observe async-compatible custom_divisor hack, update baudrate if needed */ if (baud == 38400 && ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && (priv->custom_divisor)) { baud = priv->baud_base / priv->custom_divisor; dbg("%s - custom divisor %d sets baud rate to %d", __FUNCTION__, priv->custom_divisor, baud); } /* 3. Convert baudrate to device-specific divisor */ if (!baud) baud = 9600; switch(priv->chip_type) { case SIO: /* SIO chip */ switch(baud) { case 300: div_value = ftdi_sio_b300; break; case 600: div_value = ftdi_sio_b600; break; case 1200: div_value = ftdi_sio_b1200; break; case 2400: div_value = ftdi_sio_b2400; break; case 4800: div_value = ftdi_sio_b4800; break; case 9600: div_value = ftdi_sio_b9600; break; case 19200: div_value = ftdi_sio_b19200; break; case 38400: div_value = ftdi_sio_b38400; break; case 57600: div_value = ftdi_sio_b57600; break; case 115200: div_value = ftdi_sio_b115200; break; } /* baud */ if (div_value == 0) { dbg("%s - Baudrate (%d) requested is not supported", __FUNCTION__, baud); div_value = ftdi_sio_b9600; baud = 9600; div_okay = 0; } break; case FT8U232AM: /* 8U232AM chip */ if (baud <= 3000000) { div_value = ftdi_232am_baud_to_divisor(baud); } else { dbg("%s - Baud rate too high!", __FUNCTION__); baud = 9600; div_value = ftdi_232am_baud_to_divisor(9600); div_okay = 0; } break; case FT232BM: /* FT232BM chip */ case FT2232C: /* FT2232C chip */ case FT232RL: if (baud <= 3000000) { div_value = ftdi_232bm_baud_to_divisor(baud); } else { dbg("%s - Baud rate too high!", __FUNCTION__); div_value = ftdi_232bm_baud_to_divisor(9600); div_okay = 0; baud = 9600; } break; } /* priv->chip_type */ if (div_okay) { dbg("%s - Baud rate set to %d (divisor 0x%lX) on chip %s", __FUNCTION__, baud, (unsigned long)div_value, ftdi_chip_name[priv->chip_type]); } tty_encode_baud_rate(port->tty, baud, baud); return(div_value); } static int get_serial_info(struct usb_serial_port * port, struct serial_struct __user * retinfo) { struct ftdi_private *priv = usb_get_serial_port_data(port); struct serial_struct tmp; if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.flags = priv->flags; tmp.baud_base = priv->baud_base; tmp.custom_divisor = priv->custom_divisor; if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) return -EFAULT; return 0; } /* get_serial_info */ static int set_serial_info(struct usb_serial_port * port, struct serial_struct __user * newinfo) { /* set_serial_info */ struct ftdi_private *priv = usb_get_serial_port_data(port); struct serial_struct new_serial; struct ftdi_private old_priv; if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) return -EFAULT; old_priv = * priv; /* Do error checking and permission checking */ if (!capable(CAP_SYS_ADMIN)) { if (((new_serial.flags & ~ASYNC_USR_MASK) != (priv->flags & ~ASYNC_USR_MASK))) return -EPERM; priv->flags = ((priv->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK)); priv->custom_divisor = new_serial.custom_divisor; goto check_and_exit; } if ((new_serial.baud_base != priv->baud_base) && (new_serial.baud_base < 9600)) return -EINVAL; /* Make the changes - these are privileged changes! */ priv->flags = ((priv->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS)); priv->custom_divisor = new_serial.custom_divisor; port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; check_and_exit: if ((old_priv.flags & ASYNC_SPD_MASK) != (priv->flags & ASYNC_SPD_MASK)) { if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) port->tty->alt_speed = 57600; else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) port->tty->alt_speed = 115200; else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) port->tty->alt_speed = 230400; else if ((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) port->tty->alt_speed = 460800; else port->tty->alt_speed = 0; } if (((old_priv.flags & ASYNC_SPD_MASK) != (priv->flags & ASYNC_SPD_MASK)) || (((priv->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) && (old_priv.custom_divisor != priv->custom_divisor))) { change_speed(port); } return (0); } /* set_serial_info */ /* Determine type of FTDI chip based on USB config and descriptor. */ static void ftdi_determine_type(struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); struct usb_serial *serial = port->serial; struct usb_device *udev = serial->dev; unsigned version; unsigned interfaces; /* Assume it is not the original SIO device for now. */ priv->baud_base = 48000000 / 2; priv->write_offset = 0; version = le16_to_cpu(udev->descriptor.bcdDevice); interfaces = udev->actconfig->desc.bNumInterfaces; dbg("%s: bcdDevice = 0x%x, bNumInterfaces = %u", __FUNCTION__, version, interfaces); if (interfaces > 1) { int inter; /* Multiple interfaces. Assume FT2232C. */ priv->chip_type = FT2232C; /* Determine interface code. */ inter = serial->interface->altsetting->desc.bInterfaceNumber; if (inter == 0) { priv->interface = PIT_SIOA; } else { priv->interface = PIT_SIOB; } /* BM-type devices have a bug where bcdDevice gets set * to 0x200 when iSerialNumber is 0. */ if (version < 0x500) { dbg("%s: something fishy - bcdDevice too low for multi-interface device", __FUNCTION__); } } else if (version < 0x200) { /* Old device. Assume its the original SIO. */ priv->chip_type = SIO; priv->baud_base = 12000000 / 16; priv->write_offset = 1; } else if (version < 0x400) { /* Assume its an FT8U232AM (or FT8U245AM) */ /* (It might be a BM because of the iSerialNumber bug, * but it will still work as an AM device.) */ priv->chip_type = FT8U232AM; } else if (version < 0x600) { /* Assume its an FT232BM (or FT245BM) */ priv->chip_type = FT232BM; } else { /* Assume its an FT232R */ priv->chip_type = FT232RL; } info("Detected %s", ftdi_chip_name[priv->chip_type]); } /* * *************************************************************************** * Sysfs Attribute * *************************************************************************** */ static ssize_t show_latency_timer(struct device *dev, struct device_attribute *attr, char *buf) { struct usb_serial_port *port = to_usb_serial_port(dev); struct ftdi_private *priv = usb_get_serial_port_data(port); struct usb_device *udev = port->serial->dev; unsigned short latency = 0; int rv = 0; dbg("%s",__FUNCTION__); rv = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), FTDI_SIO_GET_LATENCY_TIMER_REQUEST, FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE, 0, priv->interface, (char*) &latency, 1, WDR_TIMEOUT); if (rv < 0) { dev_err(dev, "Unable to read latency timer: %i\n", rv); return -EIO; } return sprintf(buf, "%i\n", latency); } /* Write a new value of the latency timer, in units of milliseconds. */ static ssize_t store_latency_timer(struct device *dev, struct device_attribute *attr, const char *valbuf, size_t count) { struct usb_serial_port *port = to_usb_serial_port(dev); struct ftdi_private *priv = usb_get_serial_port_data(port); struct usb_device *udev = port->serial->dev; char buf[1]; int v = simple_strtoul(valbuf, NULL, 10); int rv = 0; dbg("%s: setting latency timer = %i", __FUNCTION__, v); rv = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), FTDI_SIO_SET_LATENCY_TIMER_REQUEST, FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE, v, priv->interface, buf, 0, WDR_TIMEOUT); if (rv < 0) { dev_err(dev, "Unable to write latency timer: %i\n", rv); return -EIO; } return count; } /* Write an event character directly to the FTDI register. The ASCII value is in the low 8 bits, with the enable bit in the 9th bit. */ static ssize_t store_event_char(struct device *dev, struct device_attribute *attr, const char *valbuf, size_t count) { struct usb_serial_port *port = to_usb_serial_port(dev); struct ftdi_private *priv = usb_get_serial_port_data(port); struct usb_device *udev = port->serial->dev; char buf[1]; int v = simple_strtoul(valbuf, NULL, 10); int rv = 0; dbg("%s: setting event char = %i", __FUNCTION__, v); rv = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), FTDI_SIO_SET_EVENT_CHAR_REQUEST, FTDI_SIO_SET_EVENT_CHAR_REQUEST_TYPE, v, priv->interface, buf, 0, WDR_TIMEOUT); if (rv < 0) { dbg("Unable to write event character: %i", rv); return -EIO; } return count; } static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer, store_latency_timer); static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char); static int create_sysfs_attrs(struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); int retval = 0; dbg("%s",__FUNCTION__); /* XXX I've no idea if the original SIO supports the event_char * sysfs parameter, so I'm playing it safe. */ if (priv->chip_type != SIO) { dbg("sysfs attributes for %s", ftdi_chip_name[priv->chip_type]); retval = device_create_file(&port->dev, &dev_attr_event_char); if ((!retval) && (priv->chip_type == FT232BM || priv->chip_type == FT2232C || priv->chip_type == FT232RL)) { retval = device_create_file(&port->dev, &dev_attr_latency_timer); } } return retval; } static void remove_sysfs_attrs(struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); dbg("%s",__FUNCTION__); /* XXX see create_sysfs_attrs */ if (priv->chip_type != SIO) { device_remove_file(&port->dev, &dev_attr_event_char); if (priv->chip_type == FT232BM || priv->chip_type == FT2232C || priv->chip_type == FT232RL) { device_remove_file(&port->dev, &dev_attr_latency_timer); } } } /* * *************************************************************************** * FTDI driver specific functions * *************************************************************************** */ /* Probe function to check for special devices */ static int ftdi_sio_probe (struct usb_serial *serial, const struct usb_device_id *id) { struct ftdi_sio_quirk *quirk = (struct ftdi_sio_quirk *)id->driver_info; if (quirk && quirk->probe) { int ret = quirk->probe(serial); if (ret != 0) return ret; } usb_set_serial_data(serial, (void *)id->driver_info); return 0; } static int ftdi_sio_port_probe(struct usb_serial_port *port) { struct ftdi_private *priv; struct ftdi_sio_quirk *quirk = usb_get_serial_data(port->serial); dbg("%s",__FUNCTION__); priv = kzalloc(sizeof(struct ftdi_private), GFP_KERNEL); if (!priv){ err("%s- kmalloc(%Zd) failed.", __FUNCTION__, sizeof(struct ftdi_private)); return -ENOMEM; } spin_lock_init(&priv->rx_lock); spin_lock_init(&priv->tx_lock); init_waitqueue_head(&priv->delta_msr_wait); /* This will push the characters through immediately rather than queue a task to deliver them */ priv->flags = ASYNC_LOW_LATENCY; if (quirk && quirk->port_probe) quirk->port_probe(priv); /* Increase the size of read buffers */ kfree(port->bulk_in_buffer); port->bulk_in_buffer = kmalloc (BUFSZ, GFP_KERNEL); if (!port->bulk_in_buffer) { kfree (priv); return -ENOMEM; } if (port->read_urb) { port->read_urb->transfer_buffer = port->bulk_in_buffer; port->read_urb->transfer_buffer_length = BUFSZ; } INIT_DELAYED_WORK(&priv->rx_work, ftdi_process_read); priv->port = port; /* Free port's existing write urb and transfer buffer. */ if (port->write_urb) { usb_free_urb (port->write_urb); port->write_urb = NULL; } kfree(port->bulk_out_buffer); port->bulk_out_buffer = NULL; usb_set_serial_port_data(port, priv); ftdi_determine_type (port); create_sysfs_attrs(port); return 0; } /* Setup for the USB-UIRT device, which requires hardwired * baudrate (38400 gets mapped to 312500) */ /* Called from usbserial:serial_probe */ static void ftdi_USB_UIRT_setup (struct ftdi_private *priv) { dbg("%s",__FUNCTION__); priv->flags |= ASYNC_SPD_CUST; priv->custom_divisor = 77; priv->force_baud = 38400; } /* ftdi_USB_UIRT_setup */ /* Setup for the HE-TIRA1 device, which requires hardwired * baudrate (38400 gets mapped to 100000) and RTS-CTS enabled. */ static void ftdi_HE_TIRA1_setup (struct ftdi_private *priv) { dbg("%s",__FUNCTION__); priv->flags |= ASYNC_SPD_CUST; priv->custom_divisor = 240; priv->force_baud = 38400; priv->force_rtscts = 1; } /* ftdi_HE_TIRA1_setup */ /* * First port on JTAG adaptors such as Olimex arm-usb-ocd or the FIC/OpenMoko * Neo1973 Debug Board is reserved for JTAG interface and can be accessed from * userspace using openocd. */ static int ftdi_jtag_probe(struct usb_serial *serial) { struct usb_device *udev = serial->dev; struct usb_interface *interface = serial->interface; dbg("%s",__FUNCTION__); if (interface == udev->actconfig->interface[0]) { info("Ignoring serial port reserved for JTAG"); return -ENODEV; } return 0; } /* * The Matrix Orbital VK204-25-USB has an invalid IN endpoint. * We have to correct it if we want to read from it. */ static int ftdi_mtxorb_hack_setup(struct usb_serial *serial) { struct usb_host_endpoint *ep = serial->dev->ep_in[1]; struct usb_endpoint_descriptor *ep_desc = &ep->desc; if (ep->enabled && ep_desc->wMaxPacketSize == 0) { ep_desc->wMaxPacketSize = 0x40; info("Fixing invalid wMaxPacketSize on read pipe"); } return 0; } /* ftdi_shutdown is called from usbserial:usb_serial_disconnect * it is called when the usb device is disconnected * * usbserial:usb_serial_disconnect * calls __serial_close for each open of the port * shutdown is called then (ie ftdi_shutdown) */ static void ftdi_shutdown (struct usb_serial *serial) { dbg("%s", __FUNCTION__); } static int ftdi_sio_port_remove(struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); dbg("%s", __FUNCTION__); remove_sysfs_attrs(port); /* all open ports are closed at this point * (by usbserial.c:__serial_close, which calls ftdi_close) */ if (priv) { usb_set_serial_port_data(port, NULL); kfree(priv); } return 0; } static int ftdi_open (struct usb_serial_port *port, struct file *filp) { /* ftdi_open */ struct usb_device *dev = port->serial->dev; struct ftdi_private *priv = usb_get_serial_port_data(port); unsigned long flags; int result = 0; char buf[1]; /* Needed for the usb_control_msg I think */ dbg("%s", __FUNCTION__); spin_lock_irqsave(&priv->tx_lock, flags); priv->tx_bytes = 0; spin_unlock_irqrestore(&priv->tx_lock, flags); spin_lock_irqsave(&priv->rx_lock, flags); priv->rx_bytes = 0; spin_unlock_irqrestore(&priv->rx_lock, flags); if (port->tty) port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0; /* No error checking for this (will get errors later anyway) */ /* See ftdi_sio.h for description of what is reset */ usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_RESET_REQUEST, FTDI_SIO_RESET_REQUEST_TYPE, FTDI_SIO_RESET_SIO, priv->interface, buf, 0, WDR_TIMEOUT); /* Termios defaults are set by usb_serial_init. We don't change port->tty->termios - this would loose speed settings, etc. This is same behaviour as serial.c/rs_open() - Kuba */ /* ftdi_set_termios will send usb control messages */ if (port->tty) ftdi_set_termios(port, port->tty->termios); /* FIXME: Flow control might be enabled, so it should be checked - we have no control of defaults! */ /* Turn on RTS and DTR since we are not flow controlling by default */ set_mctrl(port, TIOCM_DTR | TIOCM_RTS); /* Not throttled */ spin_lock_irqsave(&priv->rx_lock, flags); priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); spin_unlock_irqrestore(&priv->rx_lock, flags); /* Start reading from the device */ priv->rx_processed = 0; usb_fill_bulk_urb(port->read_urb, dev, usb_rcvbulkpipe(dev, port->bulk_in_endpointAddress), port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, ftdi_read_bulk_callback, port); result = usb_submit_urb(port->read_urb, GFP_KERNEL); if (result) err("%s - failed submitting read urb, error %d", __FUNCTION__, result); return result; } /* ftdi_open */ /* * usbserial:__serial_close only calls ftdi_close if the point is open * * This only gets called when it is the last close * * */ static void ftdi_close (struct usb_serial_port *port, struct file *filp) { /* ftdi_close */ unsigned int c_cflag = port->tty->termios->c_cflag; struct ftdi_private *priv = usb_get_serial_port_data(port); char buf[1]; dbg("%s", __FUNCTION__); mutex_lock(&port->serial->disc_mutex); if (c_cflag & HUPCL && !port->serial->disconnected){ /* Disable flow control */ if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_FLOW_CTRL_REQUEST, FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 0, priv->interface, buf, 0, WDR_TIMEOUT) < 0) { err("error from flowcontrol urb"); } /* drop RTS and DTR */ clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); } /* Note change no line if hupcl is off */ mutex_unlock(&port->serial->disc_mutex); /* cancel any scheduled reading */ cancel_delayed_work(&priv->rx_work); flush_scheduled_work(); /* shutdown our bulk read */ usb_kill_urb(port->read_urb); } /* ftdi_close */ /* The SIO requires the first byte to have: * B0 1 * B1 0 * B2..7 length of message excluding byte 0 * * The new devices do not require this byte */ static int ftdi_write (struct usb_serial_port *port, const unsigned char *buf, int count) { /* ftdi_write */ struct ftdi_private *priv = usb_get_serial_port_data(port); struct urb *urb; unsigned char *buffer; int data_offset ; /* will be 1 for the SIO and 0 otherwise */ int status; int transfer_size; unsigned long flags; dbg("%s port %d, %d bytes", __FUNCTION__, port->number, count); if (count == 0) { dbg("write request of 0 bytes"); return 0; } spin_lock_irqsave(&priv->tx_lock, flags); if (priv->tx_outstanding_urbs > URB_UPPER_LIMIT) { spin_unlock_irqrestore(&priv->tx_lock, flags); dbg("%s - write limit hit\n", __FUNCTION__); return 0; } priv->tx_outstanding_urbs++; spin_unlock_irqrestore(&priv->tx_lock, flags); data_offset = priv->write_offset; dbg("data_offset set to %d",data_offset); /* Determine total transfer size */ transfer_size = count; if (data_offset > 0) { /* Original sio needs control bytes too... */ transfer_size += (data_offset * ((count + (PKTSZ - 1 - data_offset)) / (PKTSZ - data_offset))); } buffer = kmalloc (transfer_size, GFP_ATOMIC); if (!buffer) { err("%s ran out of kernel memory for urb ...", __FUNCTION__); count = -ENOMEM; goto error_no_buffer; } urb = usb_alloc_urb(0, GFP_ATOMIC); if (!urb) { err("%s - no more free urbs", __FUNCTION__); count = -ENOMEM; goto error_no_urb; } /* Copy data */ if (data_offset > 0) { /* Original sio requires control byte at start of each packet. */ int user_pktsz = PKTSZ - data_offset; int todo = count; unsigned char *first_byte = buffer; const unsigned char *current_position = buf; while (todo > 0) { if (user_pktsz > todo) { user_pktsz = todo; } /* Write the control byte at the front of the packet*/ *first_byte = 1 | ((user_pktsz) << 2); /* Copy data for packet */ memcpy (first_byte + data_offset, current_position, user_pktsz); first_byte += user_pktsz + data_offset; current_position += user_pktsz; todo -= user_pktsz; } } else { /* No control byte required. */ /* Copy in the data to send */ memcpy (buffer, buf, count); } usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, buffer); /* fill the buffer and send it */ usb_fill_bulk_urb(urb, port->serial->dev, usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), buffer, transfer_size, ftdi_write_bulk_callback, port); status = usb_submit_urb(urb, GFP_ATOMIC); if (status) { err("%s - failed submitting write urb, error %d", __FUNCTION__, status); count = status; goto error; } else { spin_lock_irqsave(&priv->tx_lock, flags); priv->tx_outstanding_bytes += count; priv->tx_bytes += count; spin_unlock_irqrestore(&priv->tx_lock, flags); } /* we are done with this urb, so let the host driver * really free it when it is finished with it */ usb_free_urb(urb); dbg("%s write returning: %d", __FUNCTION__, count); return count; error: usb_free_urb(urb); error_no_urb: kfree (buffer); error_no_buffer: spin_lock_irqsave(&priv->tx_lock, flags); priv->tx_outstanding_urbs--; spin_unlock_irqrestore(&priv->tx_lock, flags); return count; } /* ftdi_write */ /* This function may get called when the device is closed */ static void ftdi_write_bulk_callback (struct urb *urb) { unsigned long flags; struct usb_serial_port *port = (struct usb_serial_port *)urb->context; struct ftdi_private *priv; int data_offset; /* will be 1 for the SIO and 0 otherwise */ unsigned long countback; int status = urb->status; /* free up the transfer buffer, as usb_free_urb() does not do this */ kfree (urb->transfer_buffer); dbg("%s - port %d", __FUNCTION__, port->number); if (status) { dbg("nonzero write bulk status received: %d", status); return; } priv = usb_get_serial_port_data(port); if (!priv) { dbg("%s - bad port private data pointer - exiting", __FUNCTION__); return; } /* account for transferred data */ countback = urb->actual_length; data_offset = priv->write_offset; if (data_offset > 0) { /* Subtract the control bytes */ countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ)); } spin_lock_irqsave(&priv->tx_lock, flags); --priv->tx_outstanding_urbs; priv->tx_outstanding_bytes -= countback; spin_unlock_irqrestore(&priv->tx_lock, flags); usb_serial_port_softint(port); } /* ftdi_write_bulk_callback */ static int ftdi_write_room( struct usb_serial_port *port ) { struct ftdi_private *priv = usb_get_serial_port_data(port); int room; unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); spin_lock_irqsave(&priv->tx_lock, flags); if (priv->tx_outstanding_urbs < URB_UPPER_LIMIT) { /* * We really can take anything the user throws at us * but let's pick a nice big number to tell the tty * layer that we have lots of free space */ room = 2048; } else { room = 0; } spin_unlock_irqrestore(&priv->tx_lock, flags); return room; } /* ftdi_write_room */ static int ftdi_chars_in_buffer (struct usb_serial_port *port) { /* ftdi_chars_in_buffer */ struct ftdi_private *priv = usb_get_serial_port_data(port); int buffered; unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); spin_lock_irqsave(&priv->tx_lock, flags); buffered = (int)priv->tx_outstanding_bytes; spin_unlock_irqrestore(&priv->tx_lock, flags); if (buffered < 0) { err("%s outstanding tx bytes is negative!", __FUNCTION__); buffered = 0; } return buffered; } /* ftdi_chars_in_buffer */ static void ftdi_read_bulk_callback (struct urb *urb) { /* ftdi_read_bulk_callback */ struct usb_serial_port *port = (struct usb_serial_port *)urb->context; struct tty_struct *tty; struct ftdi_private *priv; unsigned long countread; unsigned long flags; int status = urb->status; if (urb->number_of_packets > 0) { err("%s transfer_buffer_length %d actual_length %d number of packets %d",__FUNCTION__, urb->transfer_buffer_length, urb->actual_length, urb->number_of_packets ); err("%s transfer_flags %x ", __FUNCTION__,urb->transfer_flags ); } dbg("%s - port %d", __FUNCTION__, port->number); if (port->open_count <= 0) return; tty = port->tty; if (!tty) { dbg("%s - bad tty pointer - exiting",__FUNCTION__); return; } priv = usb_get_serial_port_data(port); if (!priv) { dbg("%s - bad port private data pointer - exiting", __FUNCTION__); return; } if (urb != port->read_urb) { err("%s - Not my urb!", __FUNCTION__); } if (status) { /* This will happen at close every time so it is a dbg not an err */ dbg("(this is ok on close) nonzero read bulk status received: " "%d", status); return; } /* count data bytes, but not status bytes */ countread = urb->actual_length; countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ); spin_lock_irqsave(&priv->rx_lock, flags); priv->rx_bytes += countread; spin_unlock_irqrestore(&priv->rx_lock, flags); ftdi_process_read(&priv->rx_work.work); } /* ftdi_read_bulk_callback */ static void ftdi_process_read (struct work_struct *work) { /* ftdi_process_read */ struct ftdi_private *priv = container_of(work, struct ftdi_private, rx_work.work); struct usb_serial_port *port = priv->port; struct urb *urb; struct tty_struct *tty; char error_flag; unsigned char *data; int i; int result; int need_flip; int packet_offset; unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); if (port->open_count <= 0) return; tty = port->tty; if (!tty) { dbg("%s - bad tty pointer - exiting",__FUNCTION__); return; } priv = usb_get_serial_port_data(port); if (!priv) { dbg("%s - bad port private data pointer - exiting", __FUNCTION__); return; } urb = port->read_urb; if (!urb) { dbg("%s - bad read_urb pointer - exiting", __FUNCTION__); return; } data = urb->transfer_buffer; if (priv->rx_processed) { dbg("%s - already processed: %d bytes, %d remain", __FUNCTION__, priv->rx_processed, urb->actual_length - priv->rx_processed); } else { /* The first two bytes of every read packet are status */ if (urb->actual_length > 2) { usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); } else { dbg("Status only: %03oo %03oo",data[0],data[1]); } } /* TO DO -- check for hung up line and handle appropriately: */ /* send hangup */ /* See acm.c - you do a tty_hangup - eg tty_hangup(tty) */ /* if CD is dropped and the line is not CLOCAL then we should hangup */ need_flip = 0; for (packet_offset = priv->rx_processed; packet_offset < urb->actual_length; packet_offset += PKTSZ) { int length; /* Compare new line status to the old one, signal if different */ /* N.B. packet may be processed more than once, but differences * are only processed once. */ if (priv != NULL) { char new_status = data[packet_offset+0] & FTDI_STATUS_B0_MASK; if (new_status != priv->prev_status) { priv->diff_status |= new_status ^ priv->prev_status; wake_up_interruptible(&priv->delta_msr_wait); priv->prev_status = new_status; } } length = min(PKTSZ, urb->actual_length-packet_offset)-2; if (length < 0) { err("%s - bad packet length: %d", __FUNCTION__, length+2); length = 0; } if (priv->rx_flags & THROTTLED) { dbg("%s - throttled", __FUNCTION__); break; } if (tty_buffer_request_room(tty, length) < length) { /* break out & wait for throttling/unthrottling to happen */ dbg("%s - receive room low", __FUNCTION__); break; } /* Handle errors and break */ error_flag = TTY_NORMAL; /* Although the device uses a bitmask and hence can have multiple */ /* errors on a packet - the order here sets the priority the */ /* error is returned to the tty layer */ if ( data[packet_offset+1] & FTDI_RS_OE ) { error_flag = TTY_OVERRUN; dbg("OVERRRUN error"); } if ( data[packet_offset+1] & FTDI_RS_BI ) { error_flag = TTY_BREAK; dbg("BREAK received"); } if ( data[packet_offset+1] & FTDI_RS_PE ) { error_flag = TTY_PARITY; dbg("PARITY error"); } if ( data[packet_offset+1] & FTDI_RS_FE ) { error_flag = TTY_FRAME; dbg("FRAMING error"); } if (length > 0) { for (i = 2; i < length+2; i++) { /* Note that the error flag is duplicated for every character received since we don't know which character it applied to */ tty_insert_flip_char(tty, data[packet_offset+i], error_flag); } need_flip = 1; } #ifdef NOT_CORRECT_BUT_KEEPING_IT_FOR_NOW /* if a parity error is detected you get status packets forever until a character is sent without a parity error. This doesn't work well since the application receives a never ending stream of bad data - even though new data hasn't been sent. Therefore I (bill) have taken this out. However - this might make sense for framing errors and so on so I am leaving the code in for now. */ else { if (error_flag != TTY_NORMAL){ dbg("error_flag is not normal"); /* In this case it is just status - if that is an error send a bad character */ if(tty->flip.count >= TTY_FLIPBUF_SIZE) { tty_flip_buffer_push(tty); } tty_insert_flip_char(tty, 0xff, error_flag); need_flip = 1; } } #endif } /* "for(packet_offset=0..." */ /* Low latency */ if (need_flip) { tty_flip_buffer_push(tty); } if (packet_offset < urb->actual_length) { /* not completely processed - record progress */ priv->rx_processed = packet_offset; dbg("%s - incomplete, %d bytes processed, %d remain", __FUNCTION__, packet_offset, urb->actual_length - packet_offset); /* check if we were throttled while processing */ spin_lock_irqsave(&priv->rx_lock, flags); if (priv->rx_flags & THROTTLED) { priv->rx_flags |= ACTUALLY_THROTTLED; spin_unlock_irqrestore(&priv->rx_lock, flags); dbg("%s - deferring remainder until unthrottled", __FUNCTION__); return; } spin_unlock_irqrestore(&priv->rx_lock, flags); /* if the port is closed stop trying to read */ if (port->open_count > 0){ /* delay processing of remainder */ schedule_delayed_work(&priv->rx_work, 1); } else { dbg("%s - port is closed", __FUNCTION__); } return; } /* urb is completely processed */ priv->rx_processed = 0; /* if the port is closed stop trying to read */ if (port->open_count > 0){ /* Continue trying to always read */ usb_fill_bulk_urb(port->read_urb, port->serial->dev, usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress), port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, ftdi_read_bulk_callback, port); result = usb_submit_urb(port->read_urb, GFP_ATOMIC); if (result) err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result); } return; } /* ftdi_process_read */ static void ftdi_break_ctl( struct usb_serial_port *port, int break_state ) { struct ftdi_private *priv = usb_get_serial_port_data(port); __u16 urb_value = 0; char buf[1]; /* break_state = -1 to turn on break, and 0 to turn off break */ /* see drivers/char/tty_io.c to see it used */ /* last_set_data_urb_value NEVER has the break bit set in it */ if (break_state) { urb_value = priv->last_set_data_urb_value | FTDI_SIO_SET_BREAK; } else { urb_value = priv->last_set_data_urb_value; } if (usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), FTDI_SIO_SET_DATA_REQUEST, FTDI_SIO_SET_DATA_REQUEST_TYPE, urb_value , priv->interface, buf, 0, WDR_TIMEOUT) < 0) { err("%s FAILED to enable/disable break state (state was %d)", __FUNCTION__,break_state); } dbg("%s break state is %d - urb is %d", __FUNCTION__,break_state, urb_value); } /* old_termios contains the original termios settings and tty->termios contains * the new setting to be used * WARNING: set_termios calls this with old_termios in kernel space */ static void ftdi_set_termios (struct usb_serial_port *port, struct ktermios *old_termios) { /* ftdi_termios */ struct usb_device *dev = port->serial->dev; struct ftdi_private *priv = usb_get_serial_port_data(port); struct ktermios *termios = port->tty->termios; unsigned int cflag = termios->c_cflag; __u16 urb_value; /* will hold the new flags */ char buf[1]; /* Perhaps I should dynamically alloc this? */ // Added for xon/xoff support unsigned int iflag = termios->c_iflag; unsigned char vstop; unsigned char vstart; dbg("%s", __FUNCTION__); /* Force baud rate if this device requires it, unless it is set to B0. */ if (priv->force_baud && ((termios->c_cflag & CBAUD) != B0)) { dbg("%s: forcing baud rate for this device", __FUNCTION__); tty_encode_baud_rate(port->tty, priv->force_baud, priv->force_baud); } /* Force RTS-CTS if this device requires it. */ if (priv->force_rtscts) { dbg("%s: forcing rtscts for this device", __FUNCTION__); termios->c_cflag |= CRTSCTS; } cflag = termios->c_cflag; /* FIXME -For this cut I don't care if the line is really changing or not - so just do the change regardless - should be able to compare old_termios and tty->termios */ /* NOTE These routines can get interrupted by ftdi_sio_read_bulk_callback - need to examine what this means - don't see any problems yet */ /* Set number of data bits, parity, stop bits */ termios->c_cflag &= ~CMSPAR; urb_value = 0; urb_value |= (cflag & CSTOPB ? FTDI_SIO_SET_DATA_STOP_BITS_2 : FTDI_SIO_SET_DATA_STOP_BITS_1); urb_value |= (cflag & PARENB ? (cflag & PARODD ? FTDI_SIO_SET_DATA_PARITY_ODD : FTDI_SIO_SET_DATA_PARITY_EVEN) : FTDI_SIO_SET_DATA_PARITY_NONE); if (cflag & CSIZE) { switch (cflag & CSIZE) { case CS5: urb_value |= 5; dbg("Setting CS5"); break; case CS6: urb_value |= 6; dbg("Setting CS6"); break; case CS7: urb_value |= 7; dbg("Setting CS7"); break; case CS8: urb_value |= 8; dbg("Setting CS8"); break; default: err("CSIZE was set but not CS5-CS8"); } } /* This is needed by the break command since it uses the same command - but is * or'ed with this value */ priv->last_set_data_urb_value = urb_value; if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_DATA_REQUEST, FTDI_SIO_SET_DATA_REQUEST_TYPE, urb_value , priv->interface, buf, 0, WDR_SHORT_TIMEOUT) < 0) { err("%s FAILED to set databits/stopbits/parity", __FUNCTION__); } /* Now do the baudrate */ if ((cflag & CBAUD) == B0 ) { /* Disable flow control */ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_FLOW_CTRL_REQUEST, FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 0, priv->interface, buf, 0, WDR_TIMEOUT) < 0) { err("%s error from disable flowcontrol urb", __FUNCTION__); } /* Drop RTS and DTR */ clear_mctrl(port, TIOCM_DTR | TIOCM_RTS); } else { /* set the baudrate determined before */ if (change_speed(port)) { err("%s urb failed to set baudrate", __FUNCTION__); } /* Ensure RTS and DTR are raised when baudrate changed from 0 */ if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) { set_mctrl(port, TIOCM_DTR | TIOCM_RTS); } } /* Set flow control */ /* Note device also supports DTR/CD (ugh) and Xon/Xoff in hardware */ if (cflag & CRTSCTS) { dbg("%s Setting to CRTSCTS flow control", __FUNCTION__); if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_FLOW_CTRL_REQUEST, FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 0 , (FTDI_SIO_RTS_CTS_HS | priv->interface), buf, 0, WDR_TIMEOUT) < 0) { err("urb failed to set to rts/cts flow control"); } } else { /* * Xon/Xoff code * * Check the IXOFF status in the iflag component of the termios structure * if IXOFF is not set, the pre-xon/xoff code is executed. */ if (iflag & IXOFF) { dbg("%s request to enable xonxoff iflag=%04x",__FUNCTION__,iflag); // Try to enable the XON/XOFF on the ftdi_sio // Set the vstart and vstop -- could have been done up above where // a lot of other dereferencing is done but that would be very // inefficient as vstart and vstop are not always needed vstart = termios->c_cc[VSTART]; vstop = termios->c_cc[VSTOP]; urb_value=(vstop << 8) | (vstart); if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_FLOW_CTRL_REQUEST, FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, urb_value , (FTDI_SIO_XON_XOFF_HS | priv->interface), buf, 0, WDR_TIMEOUT) < 0) { err("urb failed to set to xon/xoff flow control"); } } else { /* else clause to only run if cfag ! CRTSCTS and iflag ! XOFF */ /* CHECKME Assuming XON/XOFF handled by tty stack - not by device */ dbg("%s Turning off hardware flow control", __FUNCTION__); if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), FTDI_SIO_SET_FLOW_CTRL_REQUEST, FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE, 0, priv->interface, buf, 0, WDR_TIMEOUT) < 0) { err("urb failed to clear flow control"); } } } return; } /* ftdi_termios */ static int ftdi_tiocmget (struct usb_serial_port *port, struct file *file) { struct ftdi_private *priv = usb_get_serial_port_data(port); unsigned char buf[2]; int ret; dbg("%s TIOCMGET", __FUNCTION__); switch (priv->chip_type) { case SIO: /* Request the status from the device */ if ((ret = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), FTDI_SIO_GET_MODEM_STATUS_REQUEST, FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 0, 0, buf, 1, WDR_TIMEOUT)) < 0 ) { err("%s Could not get modem status of device - err: %d", __FUNCTION__, ret); return(ret); } break; case FT8U232AM: case FT232BM: case FT2232C: case FT232RL: /* the 8U232AM returns a two byte value (the sio is a 1 byte value) - in the same format as the data returned from the in point */ if ((ret = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), FTDI_SIO_GET_MODEM_STATUS_REQUEST, FTDI_SIO_GET_MODEM_STATUS_REQUEST_TYPE, 0, priv->interface, buf, 2, WDR_TIMEOUT)) < 0 ) { err("%s Could not get modem status of device - err: %d", __FUNCTION__, ret); return(ret); } break; default: return -EFAULT; break; } return (buf[0] & FTDI_SIO_DSR_MASK ? TIOCM_DSR : 0) | (buf[0] & FTDI_SIO_CTS_MASK ? TIOCM_CTS : 0) | (buf[0] & FTDI_SIO_RI_MASK ? TIOCM_RI : 0) | (buf[0] & FTDI_SIO_RLSD_MASK ? TIOCM_CD : 0) | priv->last_dtr_rts; } static int ftdi_tiocmset(struct usb_serial_port *port, struct file * file, unsigned int set, unsigned int clear) { dbg("%s TIOCMSET", __FUNCTION__); return update_mctrl(port, set, clear); } static int ftdi_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) { struct ftdi_private *priv = usb_get_serial_port_data(port); dbg("%s cmd 0x%04x", __FUNCTION__, cmd); /* Based on code from acm.c and others */ switch (cmd) { case TIOCGSERIAL: /* gets serial port data */ return get_serial_info(port, (struct serial_struct __user *) arg); case TIOCSSERIAL: /* sets serial port data */ return set_serial_info(port, (struct serial_struct __user *) arg); /* * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change * - mask passed in arg for lines of interest * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) * Caller should use TIOCGICOUNT to see which one it was. * * This code is borrowed from linux/drivers/char/serial.c */ case TIOCMIWAIT: while (priv != NULL) { interruptible_sleep_on(&priv->delta_msr_wait); /* see if a signal did it */ if (signal_pending(current)) return -ERESTARTSYS; else { char diff = priv->diff_status; if (diff == 0) { return -EIO; /* no change => error */ } /* Consume all events */ priv->diff_status = 0; /* Return 0 if caller wanted to know about these bits */ if ( ((arg & TIOCM_RNG) && (diff & FTDI_RS0_RI)) || ((arg & TIOCM_DSR) && (diff & FTDI_RS0_DSR)) || ((arg & TIOCM_CD) && (diff & FTDI_RS0_RLSD)) || ((arg & TIOCM_CTS) && (diff & FTDI_RS0_CTS)) ) { return 0; } /* * Otherwise caller can't care less about what happened, * and so we continue to wait for more events. */ } } return(0); break; default: break; } /* This is not necessarily an error - turns out the higher layers will do * some ioctls itself (see comment above) */ dbg("%s arg not supported - it was 0x%04x - check /usr/include/asm/ioctls.h", __FUNCTION__, cmd); return(-ENOIOCTLCMD); } /* ftdi_ioctl */ static void ftdi_throttle (struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); spin_lock_irqsave(&priv->rx_lock, flags); priv->rx_flags |= THROTTLED; spin_unlock_irqrestore(&priv->rx_lock, flags); } static void ftdi_unthrottle (struct usb_serial_port *port) { struct ftdi_private *priv = usb_get_serial_port_data(port); int actually_throttled; unsigned long flags; dbg("%s - port %d", __FUNCTION__, port->number); spin_lock_irqsave(&priv->rx_lock, flags); actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED); spin_unlock_irqrestore(&priv->rx_lock, flags); if (actually_throttled) schedule_delayed_work(&priv->rx_work, 0); } static int __init ftdi_init (void) { int retval; dbg("%s", __FUNCTION__); if (vendor > 0 && product > 0) { /* Add user specified VID/PID to reserved element of table. */ int i; for (i = 0; id_table_combined[i].idVendor; i++) ; id_table_combined[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE; id_table_combined[i].idVendor = vendor; id_table_combined[i].idProduct = product; } retval = usb_serial_register(&ftdi_sio_device); if (retval) goto failed_sio_register; retval = usb_register(&ftdi_driver); if (retval) goto failed_usb_register; info(DRIVER_VERSION ":" DRIVER_DESC); return 0; failed_usb_register: usb_serial_deregister(&ftdi_sio_device); failed_sio_register: return retval; } static void __exit ftdi_exit (void) { dbg("%s", __FUNCTION__); usb_deregister (&ftdi_driver); usb_serial_deregister (&ftdi_sio_device); } module_init(ftdi_init); module_exit(ftdi_exit); MODULE_AUTHOR( DRIVER_AUTHOR ); MODULE_DESCRIPTION( DRIVER_DESC ); MODULE_LICENSE("GPL"); module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Debug enabled or not"); module_param(vendor, ushort, 0); MODULE_PARM_DESC(vendor, "User specified vendor ID (default=" __MODULE_STRING(FTDI_VID)")"); module_param(product, ushort, 0); MODULE_PARM_DESC(vendor, "User specified product ID");