| /* |
| * Edgeport USB Serial Converter driver |
| * |
| * Copyright (C) 2000 Inside Out Networks, All rights reserved. |
| * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> |
| * |
| * 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. |
| * |
| * Supports the following devices: |
| * Edgeport/4 |
| * Edgeport/4t |
| * Edgeport/2 |
| * Edgeport/4i |
| * Edgeport/2i |
| * Edgeport/421 |
| * Edgeport/21 |
| * Rapidport/4 |
| * Edgeport/8 |
| * Edgeport/2D8 |
| * Edgeport/4D8 |
| * Edgeport/8i |
| * |
| * For questions or problems with this driver, contact Inside Out |
| * Networks technical support, or Peter Berger <pberger@brimson.com>, |
| * or Al Borchers <alborchers@steinerpoint.com>. |
| * |
| * Version history: |
| * |
| * 2003_04_03 al borchers |
| * - fixed a bug (that shows up with dosemu) where the tty struct is |
| * used in a callback after it has been freed |
| * |
| * 2.3 2002_03_08 greg kroah-hartman |
| * - fixed bug when multiple devices were attached at the same time. |
| * |
| * 2.2 2001_11_14 greg kroah-hartman |
| * - fixed bug in edge_close that kept the port from being used more |
| * than once. |
| * - fixed memory leak on device removal. |
| * - fixed potential double free of memory when command urb submitting |
| * failed. |
| * - other small cleanups when the device is removed |
| * |
| * 2.1 2001_07_09 greg kroah-hartman |
| * - added support for TIOCMBIS and TIOCMBIC. |
| * |
| * (04/08/2001) gb |
| * - Identify version on module load. |
| * |
| * 2.0 2001_03_05 greg kroah-hartman |
| * - reworked entire driver to fit properly in with the other usb-serial |
| * drivers. Occasional oopses still happen, but it's a good start. |
| * |
| * 1.2.3 (02/23/2001) greg kroah-hartman |
| * - changed device table to work properly for 2.4.x final format. |
| * - fixed problem with dropping data at high data rates. |
| * |
| * 1.2.2 (11/27/2000) greg kroah-hartman |
| * - cleaned up more NTisms. |
| * - Added device table for 2.4.0-test11 |
| * |
| * 1.2.1 (11/08/2000) greg kroah-hartman |
| * - Started to clean up NTisms. |
| * - Fixed problem with dev field of urb for kernels >= 2.4.0-test9 |
| * |
| * 1.2 (10/17/2000) David Iacovelli |
| * Remove all EPIC code and GPL source |
| * Fix RELEVANT_IFLAG macro to include flow control |
| * changes port configuration changes. |
| * Fix redefinition of SERIAL_MAGIC |
| * Change all timeout values to 5 seconds |
| * Tried to fix the UHCI multiple urb submission, but failed miserably. |
| * it seems to work fine with OHCI. |
| * ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must |
| * find a way to work arount this UHCI bug ) |
| * |
| * 1.1 (10/11/2000) David Iacovelli |
| * Fix XON/XOFF flow control to support both IXON and IXOFF |
| * |
| * 0.9.27 (06/30/2000) David Iacovelli |
| * Added transmit queue and now allocate urb for command writes. |
| * |
| * 0.9.26 (06/29/2000) David Iacovelli |
| * Add support for 80251 based edgeport |
| * |
| * 0.9.25 (06/27/2000) David Iacovelli |
| * Do not close the port if it has multiple opens. |
| * |
| * 0.9.24 (05/26/2000) David Iacovelli |
| * Add IOCTLs to support RXTX and JAVA POS |
| * and first cut at running BlackBox Demo |
| * |
| * 0.9.23 (05/24/2000) David Iacovelli |
| * Add IOCTLs to support RXTX and JAVA POS |
| * |
| * 0.9.22 (05/23/2000) David Iacovelli |
| * fixed bug in enumeration. If epconfig turns on mapping by |
| * path after a device is already plugged in, we now update |
| * the mapping correctly |
| * |
| * 0.9.21 (05/16/2000) David Iacovelli |
| * Added BlockUntilChaseResp() to also wait for txcredits |
| * Updated the way we allocate and handle write URBs |
| * Add debug code to dump buffers |
| * |
| * 0.9.20 (05/01/2000) David Iacovelli |
| * change driver to use usb/tts/ |
| * |
| * 0.9.19 (05/01/2000) David Iacovelli |
| * Update code to compile if DEBUG is off |
| * |
| * 0.9.18 (04/28/2000) David Iacovelli |
| * cleanup and test tty_register with devfs |
| * |
| * 0.9.17 (04/27/2000) greg kroah-hartman |
| * changed tty_register around to be like the way it |
| * was before, but now it works properly with devfs. |
| * |
| * 0.9.16 (04/26/2000) david iacovelli |
| * Fixed bug in GetProductInfo() |
| * |
| * 0.9.15 (04/25/2000) david iacovelli |
| * Updated enumeration |
| * |
| * 0.9.14 (04/24/2000) david iacovelli |
| * Removed all config/status IOCTLS and |
| * converted to using /proc/edgeport |
| * still playing with devfs |
| * |
| * 0.9.13 (04/24/2000) david iacovelli |
| * Removed configuration based on ttyUSB0 |
| * Added support for configuration using /prod/edgeport |
| * first attempt at using devfs (not working yet!) |
| * Added IOCTL to GetProductInfo() |
| * Added support for custom baud rates |
| * Add support for random port numbers |
| * |
| * 0.9.12 (04/18/2000) david iacovelli |
| * added additional configuration IOCTLs |
| * use ttyUSB0 for configuration |
| * |
| * 0.9.11 (04/17/2000) greg kroah-hartman |
| * fixed module initialization race conditions. |
| * made all urbs dynamically allocated. |
| * made driver devfs compatible. now it only registers the tty device |
| * when the device is actually plugged in. |
| * |
| * 0.9.10 (04/13/2000) greg kroah-hartman |
| * added proc interface framework. |
| * |
| * 0.9.9 (04/13/2000) david iacovelli |
| * added enumeration code and ioctls to configure the device |
| * |
| * 0.9.8 (04/12/2000) david iacovelli |
| * Change interrupt read start when device is plugged in |
| * and stop when device is removed |
| * process interrupt reads when all ports are closed |
| * (keep value of rxBytesAvail consistent with the edgeport) |
| * set the USB_BULK_QUEUE flag so that we can shove a bunch |
| * of urbs at once down the pipe |
| * |
| * 0.9.7 (04/10/2000) david iacovelli |
| * start to add enumeration code. |
| * generate serial number for epic devices |
| * add support for kdb |
| * |
| * 0.9.6 (03/30/2000) david iacovelli |
| * add IOCTL to get string, manufacture, and boot descriptors |
| * |
| * 0.9.5 (03/14/2000) greg kroah-hartman |
| * more error checking added to SerialOpen to try to fix UHCI open problem |
| * |
| * 0.9.4 (03/09/2000) greg kroah-hartman |
| * added more error checking to handle oops when data is hanging |
| * around and tty is abruptly closed. |
| * |
| * 0.9.3 (03/09/2000) david iacovelli |
| * Add epic support for xon/xoff chars |
| * play with performance |
| * |
| * 0.9.2 (03/08/2000) greg kroah-hartman |
| * changed most "info" calls to "dbg" |
| * implemented flow control properly in the termios call |
| * |
| * 0.9.1 (03/08/2000) david iacovelli |
| * added EPIC support |
| * enabled bootloader update |
| * |
| * 0.9 (03/08/2000) greg kroah-hartman |
| * Release to IO networks. |
| * Integrated changes that David made |
| * made getting urbs for writing SMP safe |
| * |
| * 0.8 (03/07/2000) greg kroah-hartman |
| * Release to IO networks. |
| * Fixed problems that were seen in code by David. |
| * Now both Edgeport/4 and Edgeport/2 works properly. |
| * Changed most of the functions to use port instead of serial. |
| * |
| * 0.7 (02/27/2000) greg kroah-hartman |
| * Milestone 3 release. |
| * Release to IO Networks |
| * ioctl for waiting on line change implemented. |
| * ioctl for getting statistics implemented. |
| * multiport support working. |
| * lsr and msr registers are now handled properly. |
| * change break now hooked up and working. |
| * support for all known Edgeport devices. |
| * |
| * 0.6 (02/22/2000) greg kroah-hartman |
| * Release to IO networks. |
| * CHASE is implemented correctly when port is closed. |
| * SerialOpen now blocks correctly until port is fully opened. |
| * |
| * 0.5 (02/20/2000) greg kroah-hartman |
| * Release to IO networks. |
| * Known problems: |
| * modem status register changes are not sent on to the user |
| * CHASE is not implemented when the port is closed. |
| * |
| * 0.4 (02/16/2000) greg kroah-hartman |
| * Second cut at the CeBit demo. |
| * Doesn't leak memory on every write to the port |
| * Still small leaks on startup. |
| * Added support for Edgeport/2 and Edgeport/8 |
| * |
| * 0.3 (02/15/2000) greg kroah-hartman |
| * CeBit demo release. |
| * Force the line settings to 4800, 8, 1, e for the demo. |
| * Warning! This version leaks memory like crazy! |
| * |
| * 0.2 (01/30/2000) greg kroah-hartman |
| * Milestone 1 release. |
| * Device is found by USB subsystem, enumerated, fimware is downloaded |
| * and the descriptors are printed to the debug log, config is set, and |
| * green light starts to blink. Open port works, and data can be sent |
| * and received at the default settings of the UART. Loopback connector |
| * and debug log confirms this. |
| * |
| * 0.1 (01/23/2000) greg kroah-hartman |
| * Initial release to help IO Networks try to set up their test system. |
| * Edgeport4 is recognized, firmware is downloaded, config is set so |
| * device blinks green light every 3 sec. Port is bound, but opening, |
| * closing, and sending data do not work properly. |
| * |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/jiffies.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/serial.h> |
| #include <linux/ioctl.h> |
| #include <linux/wait.h> |
| #include <asm/uaccess.h> |
| #include <linux/usb.h> |
| #include "usb-serial.h" |
| #include "io_edgeport.h" |
| #include "io_ionsp.h" /* info for the iosp messages */ |
| #include "io_16654.h" /* 16654 UART defines */ |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_VERSION "v2.7" |
| #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" |
| #define DRIVER_DESC "Edgeport USB Serial Driver" |
| |
| /* First, the latest boot code - for first generation edgeports */ |
| #define IMAGE_ARRAY_NAME BootCodeImage_GEN1 |
| #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN1 |
| #include "io_fw_boot.h" /* the bootloader firmware to download to a device, if it needs it */ |
| |
| /* for second generation edgeports */ |
| #define IMAGE_ARRAY_NAME BootCodeImage_GEN2 |
| #define IMAGE_VERSION_NAME BootCodeImageVersion_GEN2 |
| #include "io_fw_boot2.h" /* the bootloader firmware to download to a device, if it needs it */ |
| |
| /* Then finally the main run-time operational code - for first generation edgeports */ |
| #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN1 |
| #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN1 |
| #include "io_fw_down.h" /* Define array OperationalCodeImage[] */ |
| |
| /* for second generation edgeports */ |
| #define IMAGE_ARRAY_NAME OperationalCodeImage_GEN2 |
| #define IMAGE_VERSION_NAME OperationalCodeImageVersion_GEN2 |
| #include "io_fw_down2.h" /* Define array OperationalCodeImage[] */ |
| |
| #define MAX_NAME_LEN 64 |
| |
| #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ |
| #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ |
| #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ |
| |
| /* receive port state */ |
| enum RXSTATE { |
| EXPECT_HDR1 = 0, /* Expect header byte 1 */ |
| EXPECT_HDR2 = 1, /* Expect header byte 2 */ |
| EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ |
| EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ |
| }; |
| |
| |
| /* Transmit Fifo |
| * This Transmit queue is an extension of the edgeport Rx buffer. |
| * The maximum amount of data buffered in both the edgeport |
| * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. |
| */ |
| struct TxFifo { |
| unsigned int head; /* index to head pointer (write) */ |
| unsigned int tail; /* index to tail pointer (read) */ |
| unsigned int count; /* Bytes in queue */ |
| unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ |
| unsigned char *fifo; /* allocated Buffer */ |
| }; |
| |
| /* This structure holds all of the local port information */ |
| struct edgeport_port { |
| __u16 txCredits; /* our current credits for this port */ |
| __u16 maxTxCredits; /* the max size of the port */ |
| |
| struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ |
| struct urb *write_urb; /* write URB for this port */ |
| char write_in_progress; /* TRUE while a write URB is outstanding */ |
| spinlock_t ep_lock; |
| |
| __u8 shadowLCR; /* last LCR value received */ |
| __u8 shadowMCR; /* last MCR value received */ |
| __u8 shadowMSR; /* last MSR value received */ |
| __u8 shadowLSR; /* last LSR value received */ |
| __u8 shadowXonChar; /* last value set as XON char in Edgeport */ |
| __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ |
| __u8 validDataMask; |
| __u32 baudRate; |
| |
| char open; |
| char openPending; |
| char commandPending; |
| char closePending; |
| char chaseResponsePending; |
| |
| wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
| wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ |
| wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ |
| wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ |
| |
| struct async_icount icount; |
| struct usb_serial_port *port; /* loop back to the owner of this object */ |
| }; |
| |
| |
| /* This structure holds all of the individual device information */ |
| struct edgeport_serial { |
| char name[MAX_NAME_LEN+1]; /* string name of this device */ |
| |
| struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ |
| struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ |
| struct edgeport_product_info product_info; /* Product Info */ |
| |
| __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ |
| unsigned char * interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ |
| struct urb * interrupt_read_urb; /* our interrupt urb */ |
| |
| __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ |
| unsigned char * bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ |
| struct urb * read_urb; /* our bulk read urb */ |
| int read_in_progress; |
| spinlock_t es_lock; |
| |
| __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ |
| |
| __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ |
| |
| enum RXSTATE rxState; /* the current state of the bulk receive processor */ |
| __u8 rxHeader1; /* receive header byte 1 */ |
| __u8 rxHeader2; /* receive header byte 2 */ |
| __u8 rxHeader3; /* receive header byte 3 */ |
| __u8 rxPort; /* the port that we are currently receiving data for */ |
| __u8 rxStatusCode; /* the receive status code */ |
| __u8 rxStatusParam; /* the receive status paramater */ |
| __s16 rxBytesRemaining; /* the number of port bytes left to read */ |
| struct usb_serial *serial; /* loop back to the owner of this object */ |
| }; |
| |
| /* baud rate information */ |
| struct divisor_table_entry { |
| __u32 BaudRate; |
| __u16 Divisor; |
| }; |
| |
| // |
| // Define table of divisors for Rev A EdgePort/4 hardware |
| // These assume a 3.6864MHz crystal, the standard /16, and |
| // MCR.7 = 0. |
| // |
| static struct divisor_table_entry divisor_table[] = { |
| { 50, 4608}, |
| { 75, 3072}, |
| { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ |
| { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ |
| { 150, 1536}, |
| { 300, 768}, |
| { 600, 384}, |
| { 1200, 192}, |
| { 1800, 128}, |
| { 2400, 96}, |
| { 4800, 48}, |
| { 7200, 32}, |
| { 9600, 24}, |
| { 14400, 16}, |
| { 19200, 12}, |
| { 38400, 6}, |
| { 57600, 4}, |
| { 115200, 2}, |
| { 230400, 1}, |
| }; |
| |
| /* local variables */ |
| static int debug; |
| |
| static int low_latency = 1; /* tty low latency flag, on by default */ |
| |
| static int CmdUrbs = 0; /* Number of outstanding Command Write Urbs */ |
| |
| |
| /* local function prototypes */ |
| |
| /* function prototypes for all URB callbacks */ |
| static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs); |
| static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs); |
| static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs); |
| static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs); |
| |
| /* function prototypes for the usbserial callbacks */ |
| static int edge_open (struct usb_serial_port *port, struct file *filp); |
| static void edge_close (struct usb_serial_port *port, struct file *filp); |
| static int edge_write (struct usb_serial_port *port, const unsigned char *buf, int count); |
| static int edge_write_room (struct usb_serial_port *port); |
| static int edge_chars_in_buffer (struct usb_serial_port *port); |
| static void edge_throttle (struct usb_serial_port *port); |
| static void edge_unthrottle (struct usb_serial_port *port); |
| static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios); |
| static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); |
| static void edge_break (struct usb_serial_port *port, int break_state); |
| static int edge_tiocmget (struct usb_serial_port *port, struct file *file); |
| static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); |
| static int edge_startup (struct usb_serial *serial); |
| static void edge_shutdown (struct usb_serial *serial); |
| |
| |
| #include "io_tables.h" /* all of the devices that this driver supports */ |
| |
| static struct usb_driver io_driver = { |
| .owner = THIS_MODULE, |
| .name = "io_edgeport", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = id_table_combined, |
| }; |
| |
| /* function prototypes for all of our local functions */ |
| static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength); |
| static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3); |
| static void edge_tty_recv (struct device *dev, struct tty_struct *tty, unsigned char *data, int length); |
| static void handle_new_msr (struct edgeport_port *edge_port, __u8 newMsr); |
| static void handle_new_lsr (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data); |
| static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param); |
| static int calc_baud_rate_divisor (int baud_rate, int *divisor); |
| static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate); |
| static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios); |
| static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue); |
| static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength); |
| static void send_more_port_data (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port); |
| |
| static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); |
| static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); |
| static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data); |
| static void get_manufacturing_desc (struct edgeport_serial *edge_serial); |
| static void get_boot_desc (struct edgeport_serial *edge_serial); |
| static void load_application_firmware (struct edgeport_serial *edge_serial); |
| |
| static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size); |
| |
| |
| // ************************************************************************ |
| // ************************************************************************ |
| // ************************************************************************ |
| // ************************************************************************ |
| |
| /************************************************************************ |
| * * |
| * update_edgeport_E2PROM() Compare current versions of * |
| * Boot ROM and Manufacture * |
| * Descriptors with versions * |
| * embedded in this driver * |
| * * |
| ************************************************************************/ |
| static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial) |
| { |
| __u32 BootCurVer; |
| __u32 BootNewVer; |
| __u8 BootMajorVersion; |
| __u8 BootMinorVersion; |
| __le16 BootBuildNumber; |
| __u8 *BootImage; |
| __u32 BootSize; |
| struct edge_firmware_image_record *record; |
| unsigned char *firmware; |
| int response; |
| |
| |
| switch (edge_serial->product_info.iDownloadFile) { |
| case EDGE_DOWNLOAD_FILE_I930: |
| BootMajorVersion = BootCodeImageVersion_GEN1.MajorVersion; |
| BootMinorVersion = BootCodeImageVersion_GEN1.MinorVersion; |
| BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber); |
| BootImage = &BootCodeImage_GEN1[0]; |
| BootSize = sizeof( BootCodeImage_GEN1 ); |
| break; |
| |
| case EDGE_DOWNLOAD_FILE_80251: |
| BootMajorVersion = BootCodeImageVersion_GEN2.MajorVersion; |
| BootMinorVersion = BootCodeImageVersion_GEN2.MinorVersion; |
| BootBuildNumber = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber); |
| BootImage = &BootCodeImage_GEN2[0]; |
| BootSize = sizeof( BootCodeImage_GEN2 ); |
| break; |
| |
| default: |
| return; |
| } |
| |
| // Check Boot Image Version |
| BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + |
| (edge_serial->boot_descriptor.MinorVersion << 16) + |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); |
| |
| BootNewVer = (BootMajorVersion << 24) + |
| (BootMinorVersion << 16) + |
| le16_to_cpu(BootBuildNumber); |
| |
| dbg("Current Boot Image version %d.%d.%d", |
| edge_serial->boot_descriptor.MajorVersion, |
| edge_serial->boot_descriptor.MinorVersion, |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); |
| |
| |
| if (BootNewVer > BootCurVer) { |
| dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d", |
| edge_serial->boot_descriptor.MajorVersion, |
| edge_serial->boot_descriptor.MinorVersion, |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), |
| BootMajorVersion, |
| BootMinorVersion, |
| le16_to_cpu(BootBuildNumber)); |
| |
| |
| dbg("Downloading new Boot Image"); |
| |
| firmware = BootImage; |
| |
| for (;;) { |
| record = (struct edge_firmware_image_record *)firmware; |
| response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); |
| if (response < 0) { |
| dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); |
| break; |
| } |
| firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); |
| if (firmware >= &BootImage[BootSize]) { |
| break; |
| } |
| } |
| } else { |
| dbg("Boot Image -- already up to date"); |
| } |
| } |
| |
| |
| /************************************************************************ |
| * * |
| * Get string descriptor from device * |
| * * |
| ************************************************************************/ |
| static int get_string (struct usb_device *dev, int Id, char *string) |
| { |
| struct usb_string_descriptor StringDesc; |
| struct usb_string_descriptor *pStringDesc; |
| |
| dbg("%s - USB String ID = %d", __FUNCTION__, Id ); |
| |
| if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { |
| return 0; |
| } |
| |
| pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); |
| |
| if (!pStringDesc) { |
| return 0; |
| } |
| |
| if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { |
| kfree(pStringDesc); |
| return 0; |
| } |
| |
| unicode_to_ascii(string, pStringDesc->wData, pStringDesc->bLength/2-1); |
| |
| kfree(pStringDesc); |
| return strlen(string); |
| } |
| |
| |
| #if 0 |
| /************************************************************************ |
| * |
| * Get string descriptor from device |
| * |
| ************************************************************************/ |
| static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc) |
| { |
| struct usb_string_descriptor StringDesc; |
| struct usb_string_descriptor *pStringDesc; |
| |
| dbg("%s - USB String ID = %d", __FUNCTION__, Id ); |
| |
| if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) { |
| return 0; |
| } |
| |
| pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL); |
| |
| if (!pStringDesc) { |
| return -1; |
| } |
| |
| if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) { |
| kfree(pStringDesc); |
| return -1; |
| } |
| |
| *pRetDesc = pStringDesc; |
| return 0; |
| } |
| #endif |
| |
| static void get_product_info(struct edgeport_serial *edge_serial) |
| { |
| struct edgeport_product_info *product_info = &edge_serial->product_info; |
| |
| memset (product_info, 0, sizeof(struct edgeport_product_info)); |
| |
| product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); |
| product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; |
| product_info->ProdInfoVer = 0; |
| |
| product_info->RomSize = edge_serial->manuf_descriptor.RomSize; |
| product_info->RamSize = edge_serial->manuf_descriptor.RamSize; |
| product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; |
| product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; |
| |
| product_info->BootMajorVersion = edge_serial->boot_descriptor.MajorVersion; |
| product_info->BootMinorVersion = edge_serial->boot_descriptor.MinorVersion; |
| product_info->BootBuildNumber = edge_serial->boot_descriptor.BuildNumber; |
| |
| memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate)); |
| |
| // check if this is 2nd generation hardware |
| if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) { |
| product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN2.MajorVersion; |
| product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN2.MinorVersion; |
| product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber); |
| product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; |
| } else { |
| product_info->FirmwareMajorVersion = OperationalCodeImageVersion_GEN1.MajorVersion; |
| product_info->FirmwareMinorVersion = OperationalCodeImageVersion_GEN1.MinorVersion; |
| product_info->FirmwareBuildNumber = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber); |
| product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; |
| } |
| |
| // Determine Product type and set appropriate flags |
| switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { |
| case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: |
| case ION_DEVICE_ID_EDGEPORT_4T: |
| case ION_DEVICE_ID_EDGEPORT_4: |
| case ION_DEVICE_ID_EDGEPORT_2: |
| case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: |
| case ION_DEVICE_ID_EDGEPORT_8: |
| case ION_DEVICE_ID_EDGEPORT_421: |
| case ION_DEVICE_ID_EDGEPORT_21: |
| case ION_DEVICE_ID_EDGEPORT_2_DIN: |
| case ION_DEVICE_ID_EDGEPORT_4_DIN: |
| case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: |
| product_info->IsRS232 = 1; |
| break; |
| |
| case ION_DEVICE_ID_EDGEPORT_2I: // Edgeport/2 RS422/RS485 |
| product_info->IsRS422 = 1; |
| product_info->IsRS485 = 1; |
| break; |
| |
| case ION_DEVICE_ID_EDGEPORT_8I: // Edgeport/4 RS422 |
| case ION_DEVICE_ID_EDGEPORT_4I: // Edgeport/4 RS422 |
| product_info->IsRS422 = 1; |
| break; |
| } |
| |
| // Dump Product Info structure |
| dbg("**Product Information:"); |
| dbg(" ProductId %x", product_info->ProductId ); |
| dbg(" NumPorts %d", product_info->NumPorts ); |
| dbg(" ProdInfoVer %d", product_info->ProdInfoVer ); |
| dbg(" IsServer %d", product_info->IsServer); |
| dbg(" IsRS232 %d", product_info->IsRS232 ); |
| dbg(" IsRS422 %d", product_info->IsRS422 ); |
| dbg(" IsRS485 %d", product_info->IsRS485 ); |
| dbg(" RomSize %d", product_info->RomSize ); |
| dbg(" RamSize %d", product_info->RamSize ); |
| dbg(" CpuRev %x", product_info->CpuRev ); |
| dbg(" BoardRev %x", product_info->BoardRev); |
| dbg(" BootMajorVersion %d.%d.%d", product_info->BootMajorVersion, |
| product_info->BootMinorVersion, |
| le16_to_cpu(product_info->BootBuildNumber)); |
| dbg(" FirmwareMajorVersion %d.%d.%d", product_info->FirmwareMajorVersion, |
| product_info->FirmwareMinorVersion, |
| le16_to_cpu(product_info->FirmwareBuildNumber)); |
| dbg(" ManufactureDescDate %d/%d/%d", product_info->ManufactureDescDate[0], |
| product_info->ManufactureDescDate[1], |
| product_info->ManufactureDescDate[2]+1900); |
| dbg(" iDownloadFile 0x%x", product_info->iDownloadFile); |
| |
| } |
| |
| |
| /************************************************************************/ |
| /************************************************************************/ |
| /* U S B C A L L B A C K F U N C T I O N S */ |
| /* U S B C A L L B A C K F U N C T I O N S */ |
| /************************************************************************/ |
| /************************************************************************/ |
| |
| /***************************************************************************** |
| * edge_interrupt_callback |
| * this is the callback function for when we have received data on the |
| * interrupt endpoint. |
| *****************************************************************************/ |
| static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs) |
| { |
| struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; |
| struct edgeport_port *edge_port; |
| struct usb_serial_port *port; |
| unsigned char *data = urb->transfer_buffer; |
| int length = urb->actual_length; |
| int bytes_avail; |
| int position; |
| int txCredits; |
| int portNumber; |
| int result; |
| |
| dbg("%s", __FUNCTION__); |
| |
| switch (urb->status) { |
| case 0: |
| /* success */ |
| break; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| /* this urb is terminated, clean up */ |
| dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
| return; |
| default: |
| dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
| goto exit; |
| } |
| |
| // process this interrupt-read even if there are no ports open |
| if (length) { |
| usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data); |
| |
| if (length > 1) { |
| bytes_avail = data[0] | (data[1] << 8); |
| if (bytes_avail) { |
| spin_lock(&edge_serial->es_lock); |
| edge_serial->rxBytesAvail += bytes_avail; |
| dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress); |
| |
| if (edge_serial->rxBytesAvail > 0 && |
| !edge_serial->read_in_progress) { |
| dbg("%s - posting a read", __FUNCTION__); |
| edge_serial->read_in_progress = TRUE; |
| |
| /* we have pending bytes on the bulk in pipe, send a request */ |
| edge_serial->read_urb->dev = edge_serial->serial->dev; |
| result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result); |
| edge_serial->read_in_progress = FALSE; |
| } |
| } |
| spin_unlock(&edge_serial->es_lock); |
| } |
| } |
| /* grab the txcredits for the ports if available */ |
| position = 2; |
| portNumber = 0; |
| while ((position < length) && (portNumber < edge_serial->serial->num_ports)) { |
| txCredits = data[position] | (data[position+1] << 8); |
| if (txCredits) { |
| port = edge_serial->serial->port[portNumber]; |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_port->open) { |
| spin_lock(&edge_port->ep_lock); |
| edge_port->txCredits += txCredits; |
| spin_unlock(&edge_port->ep_lock); |
| dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits); |
| |
| /* tell the tty driver that something has changed */ |
| if (edge_port->port->tty) |
| tty_wakeup(edge_port->port->tty); |
| |
| // Since we have more credit, check if more data can be sent |
| send_more_port_data(edge_serial, edge_port); |
| } |
| } |
| position += 2; |
| ++portNumber; |
| } |
| } |
| |
| exit: |
| result = usb_submit_urb (urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result); |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * edge_bulk_in_callback |
| * this is the callback function for when we have received data on the |
| * bulk in endpoint. |
| *****************************************************************************/ |
| static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs) |
| { |
| struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context; |
| unsigned char *data = urb->transfer_buffer; |
| int status; |
| __u16 raw_data_length; |
| |
| dbg("%s", __FUNCTION__); |
| |
| if (urb->status) { |
| dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status); |
| edge_serial->read_in_progress = FALSE; |
| return; |
| } |
| |
| if (urb->actual_length == 0) { |
| dbg("%s - read bulk callback with no data", __FUNCTION__); |
| edge_serial->read_in_progress = FALSE; |
| return; |
| } |
| |
| raw_data_length = urb->actual_length; |
| |
| usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data); |
| |
| spin_lock(&edge_serial->es_lock); |
| |
| /* decrement our rxBytes available by the number that we just got */ |
| edge_serial->rxBytesAvail -= raw_data_length; |
| |
| dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail); |
| |
| process_rcvd_data (edge_serial, data, urb->actual_length); |
| |
| /* check to see if there's any more data for us to read */ |
| if (edge_serial->rxBytesAvail > 0) { |
| dbg("%s - posting a read", __FUNCTION__); |
| edge_serial->read_urb->dev = edge_serial->serial->dev; |
| status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); |
| if (status) { |
| dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status); |
| edge_serial->read_in_progress = FALSE; |
| } |
| } else { |
| edge_serial->read_in_progress = FALSE; |
| } |
| |
| spin_unlock(&edge_serial->es_lock); |
| } |
| |
| |
| /***************************************************************************** |
| * edge_bulk_out_data_callback |
| * this is the callback function for when we have finished sending serial data |
| * on the bulk out endpoint. |
| *****************************************************************************/ |
| static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs) |
| { |
| struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; |
| struct tty_struct *tty; |
| |
| dbg("%s", __FUNCTION__); |
| |
| if (urb->status) { |
| dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
| } |
| |
| tty = edge_port->port->tty; |
| |
| if (tty && edge_port->open) { |
| /* let the tty driver wakeup if it has a special write_wakeup function */ |
| tty_wakeup(tty); |
| } |
| |
| // Release the Write URB |
| edge_port->write_in_progress = FALSE; |
| |
| // Check if more data needs to be sent |
| send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port); |
| } |
| |
| |
| /***************************************************************************** |
| * BulkOutCmdCallback |
| * this is the callback function for when we have finished sending a command |
| * on the bulk out endpoint. |
| *****************************************************************************/ |
| static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs) |
| { |
| struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; |
| struct tty_struct *tty; |
| int status = urb->status; |
| |
| dbg("%s", __FUNCTION__); |
| |
| CmdUrbs--; |
| dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); |
| |
| |
| /* clean up the transfer buffer */ |
| kfree(urb->transfer_buffer); |
| |
| /* Free the command urb */ |
| usb_free_urb (urb); |
| |
| if (status) { |
| dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status); |
| return; |
| } |
| |
| /* Get pointer to tty */ |
| tty = edge_port->port->tty; |
| |
| /* tell the tty driver that something has changed */ |
| if (tty && edge_port->open) |
| tty_wakeup(tty); |
| |
| /* we have completed the command */ |
| edge_port->commandPending = FALSE; |
| wake_up(&edge_port->wait_command); |
| } |
| |
| |
| /***************************************************************************** |
| * Driver tty interface functions |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| * SerialOpen |
| * this function is called by the tty driver when a port is opened |
| * If successful, we return 0 |
| * Otherwise we return a negative error number. |
| *****************************************************************************/ |
| static int edge_open (struct usb_serial_port *port, struct file * filp) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct usb_serial *serial; |
| struct edgeport_serial *edge_serial; |
| int response; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (edge_port == NULL) |
| return -ENODEV; |
| |
| if (port->tty) |
| port->tty->low_latency = low_latency; |
| |
| /* see if we've set up our endpoint info yet (can't set it up in edge_startup |
| as the structures were not set up at that time.) */ |
| serial = port->serial; |
| edge_serial = usb_get_serial_data(serial); |
| if (edge_serial == NULL) { |
| return -ENODEV; |
| } |
| if (edge_serial->interrupt_in_buffer == NULL) { |
| struct usb_serial_port *port0 = serial->port[0]; |
| |
| /* not set up yet, so do it now */ |
| edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer; |
| edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress; |
| edge_serial->interrupt_read_urb = port0->interrupt_in_urb; |
| edge_serial->bulk_in_buffer = port0->bulk_in_buffer; |
| edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress; |
| edge_serial->read_urb = port0->read_urb; |
| edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress; |
| |
| /* set up our interrupt urb */ |
| usb_fill_int_urb(edge_serial->interrupt_read_urb, |
| serial->dev, |
| usb_rcvintpipe(serial->dev, |
| port0->interrupt_in_endpointAddress), |
| port0->interrupt_in_buffer, |
| edge_serial->interrupt_read_urb->transfer_buffer_length, |
| edge_interrupt_callback, edge_serial, |
| edge_serial->interrupt_read_urb->interval); |
| |
| /* set up our bulk in urb */ |
| usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, |
| usb_rcvbulkpipe(serial->dev, |
| port0->bulk_in_endpointAddress), |
| port0->bulk_in_buffer, |
| edge_serial->read_urb->transfer_buffer_length, |
| edge_bulk_in_callback, edge_serial); |
| edge_serial->read_in_progress = FALSE; |
| |
| /* start interrupt read for this edgeport |
| * this interrupt will continue as long as the edgeport is connected */ |
| response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL); |
| if (response) { |
| dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response); |
| } |
| } |
| |
| /* initialize our wait queues */ |
| init_waitqueue_head(&edge_port->wait_open); |
| init_waitqueue_head(&edge_port->wait_chase); |
| init_waitqueue_head(&edge_port->delta_msr_wait); |
| init_waitqueue_head(&edge_port->wait_command); |
| |
| /* initialize our icount structure */ |
| memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount)); |
| |
| /* initialize our port settings */ |
| edge_port->txCredits = 0; /* Can't send any data yet */ |
| edge_port->shadowMCR = MCR_MASTER_IE; /* Must always set this bit to enable ints! */ |
| edge_port->chaseResponsePending = FALSE; |
| |
| /* send a open port command */ |
| edge_port->openPending = TRUE; |
| edge_port->open = FALSE; |
| response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0); |
| |
| if (response < 0) { |
| dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__); |
| edge_port->openPending = FALSE; |
| return -ENODEV; |
| } |
| |
| /* now wait for the port to be completely opened */ |
| wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT); |
| |
| if (edge_port->open == FALSE) { |
| /* open timed out */ |
| dbg("%s - open timedout", __FUNCTION__); |
| edge_port->openPending = FALSE; |
| return -ENODEV; |
| } |
| |
| /* create the txfifo */ |
| edge_port->txfifo.head = 0; |
| edge_port->txfifo.tail = 0; |
| edge_port->txfifo.count = 0; |
| edge_port->txfifo.size = edge_port->maxTxCredits; |
| edge_port->txfifo.fifo = kmalloc (edge_port->maxTxCredits, GFP_KERNEL); |
| |
| if (!edge_port->txfifo.fifo) { |
| dbg("%s - no memory", __FUNCTION__); |
| edge_close (port, filp); |
| return -ENOMEM; |
| } |
| |
| /* Allocate a URB for the write */ |
| edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL); |
| edge_port->write_in_progress = FALSE; |
| |
| if (!edge_port->write_urb) { |
| dbg("%s - no memory", __FUNCTION__); |
| edge_close (port, filp); |
| return -ENOMEM; |
| } |
| |
| dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits); |
| |
| dbg("%s exited", __FUNCTION__); |
| |
| return 0; |
| } |
| |
| |
| /************************************************************************ |
| * |
| * block_until_chase_response |
| * |
| * This function will block the close until one of the following: |
| * 1. Response to our Chase comes from Edgeport |
| * 2. A timout of 10 seconds without activity has expired |
| * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) |
| * |
| ************************************************************************/ |
| static void block_until_chase_response(struct edgeport_port *edge_port) |
| { |
| DEFINE_WAIT(wait); |
| __u16 lastCredits; |
| int timeout = 1*HZ; |
| int loop = 10; |
| |
| while (1) { |
| // Save Last credits |
| lastCredits = edge_port->txCredits; |
| |
| // Did we get our Chase response |
| if (edge_port->chaseResponsePending == FALSE) { |
| dbg("%s - Got Chase Response", __FUNCTION__); |
| |
| // did we get all of our credit back? |
| if (edge_port->txCredits == edge_port->maxTxCredits ) { |
| dbg("%s - Got all credits", __FUNCTION__); |
| return; |
| } |
| } |
| |
| // Block the thread for a while |
| prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); |
| schedule_timeout(timeout); |
| finish_wait(&edge_port->wait_chase, &wait); |
| |
| if (lastCredits == edge_port->txCredits) { |
| // No activity.. count down. |
| loop--; |
| if (loop == 0) { |
| edge_port->chaseResponsePending = FALSE; |
| dbg("%s - Chase TIMEOUT", __FUNCTION__); |
| return; |
| } |
| } else { |
| // Reset timout value back to 10 seconds |
| dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits); |
| loop = 10; |
| } |
| } |
| } |
| |
| |
| /************************************************************************ |
| * |
| * block_until_tx_empty |
| * |
| * This function will block the close until one of the following: |
| * 1. TX count are 0 |
| * 2. The edgeport has stopped |
| * 3. A timout of 3 seconds without activity has expired |
| * |
| ************************************************************************/ |
| static void block_until_tx_empty (struct edgeport_port *edge_port) |
| { |
| DEFINE_WAIT(wait); |
| struct TxFifo *fifo = &edge_port->txfifo; |
| __u32 lastCount; |
| int timeout = HZ/10; |
| int loop = 30; |
| |
| while (1) { |
| // Save Last count |
| lastCount = fifo->count; |
| |
| // Is the Edgeport Buffer empty? |
| if (lastCount == 0) { |
| dbg("%s - TX Buffer Empty", __FUNCTION__); |
| return; |
| } |
| |
| // Block the thread for a while |
| prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE); |
| schedule_timeout(timeout); |
| finish_wait(&edge_port->wait_chase, &wait); |
| |
| dbg("%s wait", __FUNCTION__); |
| |
| if (lastCount == fifo->count) { |
| // No activity.. count down. |
| loop--; |
| if (loop == 0) { |
| dbg("%s - TIMEOUT", __FUNCTION__); |
| return; |
| } |
| } else { |
| // Reset timout value back to seconds |
| loop = 30; |
| } |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * edge_close |
| * this function is called by the tty driver when a port is closed |
| *****************************************************************************/ |
| static void edge_close (struct usb_serial_port *port, struct file * filp) |
| { |
| struct edgeport_serial *edge_serial; |
| struct edgeport_port *edge_port; |
| int status; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| edge_serial = usb_get_serial_data(port->serial); |
| edge_port = usb_get_serial_port_data(port); |
| if ((edge_serial == NULL) || (edge_port == NULL)) |
| return; |
| |
| // block until tx is empty |
| block_until_tx_empty(edge_port); |
| |
| edge_port->closePending = TRUE; |
| |
| /* flush and chase */ |
| edge_port->chaseResponsePending = TRUE; |
| |
| dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); |
| status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); |
| if (status == 0) { |
| // block until chase finished |
| block_until_chase_response(edge_port); |
| } else { |
| edge_port->chaseResponsePending = FALSE; |
| } |
| |
| /* close the port */ |
| dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__); |
| send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0); |
| |
| //port->close = TRUE; |
| edge_port->closePending = FALSE; |
| edge_port->open = FALSE; |
| edge_port->openPending = FALSE; |
| |
| if (edge_port->write_urb) { |
| usb_kill_urb(edge_port->write_urb); |
| } |
| |
| if (edge_port->write_urb) { |
| /* if this urb had a transfer buffer already (old transfer) free it */ |
| kfree(edge_port->write_urb->transfer_buffer); |
| usb_free_urb(edge_port->write_urb); |
| edge_port->write_urb = NULL; |
| } |
| kfree(edge_port->txfifo.fifo); |
| edge_port->txfifo.fifo = NULL; |
| |
| dbg("%s exited", __FUNCTION__); |
| } |
| |
| /***************************************************************************** |
| * SerialWrite |
| * this function is called by the tty driver when data should be written to |
| * the port. |
| * If successful, we return the number of bytes written, otherwise we return |
| * a negative error number. |
| *****************************************************************************/ |
| static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct TxFifo *fifo; |
| int copySize; |
| int bytesleft; |
| int firsthalf; |
| int secondhalf; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (edge_port == NULL) |
| return -ENODEV; |
| |
| // get a pointer to the Tx fifo |
| fifo = &edge_port->txfifo; |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| |
| // calculate number of bytes to put in fifo |
| copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count)); |
| |
| dbg("%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes", __FUNCTION__, |
| port->number, count, edge_port->txCredits - fifo->count, copySize); |
| |
| /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */ |
| if (copySize == 0) { |
| dbg("%s - copySize = Zero", __FUNCTION__); |
| goto finish_write; |
| } |
| |
| // queue the data |
| // since we can never overflow the buffer we do not have to check for full condition |
| |
| // the copy is done is two parts -- first fill to the end of the buffer |
| // then copy the reset from the start of the buffer |
| |
| bytesleft = fifo->size - fifo->head; |
| firsthalf = min (bytesleft, copySize); |
| dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft); |
| |
| /* now copy our data */ |
| memcpy(&fifo->fifo[fifo->head], data, firsthalf); |
| usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]); |
| |
| // update the index and size |
| fifo->head += firsthalf; |
| fifo->count += firsthalf; |
| |
| // wrap the index |
| if (fifo->head == fifo->size) { |
| fifo->head = 0; |
| } |
| |
| secondhalf = copySize-firsthalf; |
| |
| if (secondhalf) { |
| dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf); |
| memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); |
| usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]); |
| // update the index and size |
| fifo->count += secondhalf; |
| fifo->head += secondhalf; |
| // No need to check for wrap since we can not get to end of fifo in this part |
| } |
| |
| finish_write: |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| |
| send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port); |
| |
| dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count); |
| |
| return copySize; |
| } |
| |
| |
| /************************************************************************ |
| * |
| * send_more_port_data() |
| * |
| * This routine attempts to write additional UART transmit data |
| * to a port over the USB bulk pipe. It is called (1) when new |
| * data has been written to a port's TxBuffer from higher layers |
| * (2) when the peripheral sends us additional TxCredits indicating |
| * that it can accept more Tx data for a given port; and (3) when |
| * a bulk write completes successfully and we want to see if we |
| * can transmit more. |
| * |
| ************************************************************************/ |
| static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port) |
| { |
| struct TxFifo *fifo = &edge_port->txfifo; |
| struct urb *urb; |
| unsigned char *buffer; |
| int status; |
| int count; |
| int bytesleft; |
| int firsthalf; |
| int secondhalf; |
| unsigned long flags; |
| |
| dbg("%s(%d)", __FUNCTION__, edge_port->port->number); |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| |
| if (edge_port->write_in_progress || |
| !edge_port->open || |
| (fifo->count == 0)) { |
| dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress); |
| goto exit_send; |
| } |
| |
| // since the amount of data in the fifo will always fit into the |
| // edgeport buffer we do not need to check the write length |
| |
| // Do we have enough credits for this port to make it worthwhile |
| // to bother queueing a write. If it's too small, say a few bytes, |
| // it's better to wait for more credits so we can do a larger |
| // write. |
| if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) { |
| dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits ); |
| goto exit_send; |
| } |
| |
| // lock this write |
| edge_port->write_in_progress = TRUE; |
| |
| // get a pointer to the write_urb |
| urb = edge_port->write_urb; |
| |
| /* make sure transfer buffer is freed */ |
| kfree(urb->transfer_buffer); |
| urb->transfer_buffer = NULL; |
| |
| /* build the data header for the buffer and port that we are about to send out */ |
| count = fifo->count; |
| buffer = kmalloc (count+2, GFP_ATOMIC); |
| if (buffer == NULL) { |
| dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__); |
| edge_port->write_in_progress = FALSE; |
| goto exit_send; |
| } |
| buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count); |
| buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count); |
| |
| /* now copy our data */ |
| bytesleft = fifo->size - fifo->tail; |
| firsthalf = min (bytesleft, count); |
| memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); |
| fifo->tail += firsthalf; |
| fifo->count -= firsthalf; |
| if (fifo->tail == fifo->size) { |
| fifo->tail = 0; |
| } |
| |
| secondhalf = count-firsthalf; |
| if (secondhalf) { |
| memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf); |
| fifo->tail += secondhalf; |
| fifo->count -= secondhalf; |
| } |
| |
| if (count) |
| usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]); |
| |
| /* fill up the urb with all of our data and submit it */ |
| usb_fill_bulk_urb (urb, edge_serial->serial->dev, |
| usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), |
| buffer, count+2, edge_bulk_out_data_callback, edge_port); |
| |
| /* decrement the number of credits we have by the number we just sent */ |
| edge_port->txCredits -= count; |
| edge_port->icount.tx += count; |
| |
| urb->dev = edge_serial->serial->dev; |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (status) { |
| /* something went wrong */ |
| dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status); |
| edge_port->write_in_progress = FALSE; |
| |
| /* revert the credits as something bad happened. */ |
| edge_port->txCredits += count; |
| edge_port->icount.tx -= count; |
| } |
| dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count); |
| |
| exit_send: |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| } |
| |
| |
| /***************************************************************************** |
| * edge_write_room |
| * this function is called by the tty driver when it wants to know how many |
| * bytes of data we can accept for a specific port. |
| * If successful, we return the amount of room that we have for this port |
| * (the txCredits), |
| * Otherwise we return a negative error number. |
| *****************************************************************************/ |
| static int edge_write_room (struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int room; |
| unsigned long flags; |
| |
| dbg("%s", __FUNCTION__); |
| |
| if (edge_port == NULL) |
| return -ENODEV; |
| if (edge_port->closePending == TRUE) |
| return -ENODEV; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (!edge_port->open) { |
| dbg("%s - port not opened", __FUNCTION__); |
| return -EINVAL; |
| } |
| |
| // total of both buffers is still txCredit |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| room = edge_port->txCredits - edge_port->txfifo.count; |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| |
| dbg("%s - returns %d", __FUNCTION__, room); |
| return room; |
| } |
| |
| |
| /***************************************************************************** |
| * edge_chars_in_buffer |
| * this function is called by the tty driver when it wants to know how many |
| * bytes of data we currently have outstanding in the port (data that has |
| * been written, but hasn't made it out the port yet) |
| * If successful, we return the number of bytes left to be written in the |
| * system, |
| * Otherwise we return a negative error number. |
| *****************************************************************************/ |
| static int edge_chars_in_buffer (struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int num_chars; |
| unsigned long flags; |
| |
| dbg("%s", __FUNCTION__); |
| |
| if (edge_port == NULL) |
| return -ENODEV; |
| if (edge_port->closePending == TRUE) |
| return -ENODEV; |
| |
| if (!edge_port->open) { |
| dbg("%s - port not opened", __FUNCTION__); |
| return -EINVAL; |
| } |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count; |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| if (num_chars) { |
| dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars); |
| } |
| |
| return num_chars; |
| } |
| |
| |
| /***************************************************************************** |
| * SerialThrottle |
| * this function is called by the tty driver when it wants to stop the data |
| * being read from the port. |
| *****************************************************************************/ |
| static void edge_throttle (struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct tty_struct *tty; |
| int status; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (edge_port == NULL) |
| return; |
| |
| if (!edge_port->open) { |
| dbg("%s - port not opened", __FUNCTION__); |
| return; |
| } |
| |
| tty = port->tty; |
| if (!tty) { |
| dbg ("%s - no tty available", __FUNCTION__); |
| return; |
| } |
| |
| /* if we are implementing XON/XOFF, send the stop character */ |
| if (I_IXOFF(tty)) { |
| unsigned char stop_char = STOP_CHAR(tty); |
| status = edge_write (port, &stop_char, 1); |
| if (status <= 0) { |
| return; |
| } |
| } |
| |
| /* if we are implementing RTS/CTS, toggle that line */ |
| if (tty->termios->c_cflag & CRTSCTS) { |
| edge_port->shadowMCR &= ~MCR_RTS; |
| status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); |
| if (status != 0) { |
| return; |
| } |
| } |
| |
| return; |
| } |
| |
| |
| /***************************************************************************** |
| * edge_unthrottle |
| * this function is called by the tty driver when it wants to resume the data |
| * being read from the port (called after SerialThrottle is called) |
| *****************************************************************************/ |
| static void edge_unthrottle (struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct tty_struct *tty; |
| int status; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (edge_port == NULL) |
| return; |
| |
| if (!edge_port->open) { |
| dbg("%s - port not opened", __FUNCTION__); |
| return; |
| } |
| |
| tty = port->tty; |
| if (!tty) { |
| dbg ("%s - no tty available", __FUNCTION__); |
| return; |
| } |
| |
| /* if we are implementing XON/XOFF, send the start character */ |
| if (I_IXOFF(tty)) { |
| unsigned char start_char = START_CHAR(tty); |
| status = edge_write (port, &start_char, 1); |
| if (status <= 0) { |
| return; |
| } |
| } |
| |
| /* if we are implementing RTS/CTS, toggle that line */ |
| if (tty->termios->c_cflag & CRTSCTS) { |
| edge_port->shadowMCR |= MCR_RTS; |
| status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); |
| if (status != 0) { |
| return; |
| } |
| } |
| |
| return; |
| } |
| |
| |
| /***************************************************************************** |
| * SerialSetTermios |
| * this function is called by the tty driver when it wants to change the termios structure |
| *****************************************************************************/ |
| static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct tty_struct *tty = port->tty; |
| unsigned int cflag; |
| |
| if (!port->tty || !port->tty->termios) { |
| dbg ("%s - no tty or termios", __FUNCTION__); |
| return; |
| } |
| |
| cflag = tty->termios->c_cflag; |
| /* check that they really want us to change something */ |
| if (old_termios) { |
| if (cflag == old_termios->c_cflag && |
| tty->termios->c_iflag == old_termios->c_iflag) { |
| dbg("%s - nothing to change", __FUNCTION__); |
| return; |
| } |
| } |
| |
| dbg("%s - clfag %08x iflag %08x", __FUNCTION__, |
| tty->termios->c_cflag, tty->termios->c_iflag); |
| if (old_termios) { |
| dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, |
| old_termios->c_cflag, old_termios->c_iflag); |
| } |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| if (edge_port == NULL) |
| return; |
| |
| if (!edge_port->open) { |
| dbg("%s - port not opened", __FUNCTION__); |
| return; |
| } |
| |
| /* change the port settings to the new ones specified */ |
| change_port_settings (edge_port, old_termios); |
| |
| return; |
| } |
| |
| |
| /***************************************************************************** |
| * get_lsr_info - get line status register info |
| * |
| * Purpose: Let user call ioctl() to get info when the UART physically |
| * is emptied. On bus types like RS485, the transmitter must |
| * release the bus after transmitting. This must be done when |
| * the transmit shift register is empty, not be done when the |
| * transmit holding register is empty. This functionality |
| * allows an RS485 driver to be written in user space. |
| *****************************************************************************/ |
| static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value) |
| { |
| unsigned int result = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| if (edge_port->maxTxCredits == edge_port->txCredits && |
| edge_port->txfifo.count == 0) { |
| dbg("%s -- Empty", __FUNCTION__); |
| result = TIOCSER_TEMT; |
| } |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| |
| if (copy_to_user(value, &result, sizeof(int))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value) |
| { |
| unsigned int result = 0; |
| struct tty_struct *tty = edge_port->port->tty; |
| |
| if (!tty) |
| return -ENOIOCTLCMD; |
| |
| result = tty->read_cnt; |
| |
| dbg("%s(%d) = %d", __FUNCTION__, edge_port->port->number, result); |
| if (copy_to_user(value, &result, sizeof(int))) |
| return -EFAULT; |
| //return 0; |
| return -ENOIOCTLCMD; |
| } |
| |
| static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| unsigned int mcr; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| mcr = edge_port->shadowMCR; |
| if (set & TIOCM_RTS) |
| mcr |= MCR_RTS; |
| if (set & TIOCM_DTR) |
| mcr |= MCR_DTR; |
| if (set & TIOCM_LOOP) |
| mcr |= MCR_LOOPBACK; |
| |
| if (clear & TIOCM_RTS) |
| mcr &= ~MCR_RTS; |
| if (clear & TIOCM_DTR) |
| mcr &= ~MCR_DTR; |
| if (clear & TIOCM_LOOP) |
| mcr &= ~MCR_LOOPBACK; |
| |
| edge_port->shadowMCR = mcr; |
| |
| send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); |
| |
| return 0; |
| } |
| |
| static int edge_tiocmget(struct usb_serial_port *port, struct file *file) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| unsigned int result = 0; |
| unsigned int msr; |
| unsigned int mcr; |
| |
| dbg("%s - port %d", __FUNCTION__, port->number); |
| |
| msr = edge_port->shadowMSR; |
| mcr = edge_port->shadowMCR; |
| result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ |
| | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ |
| | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ |
| | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ |
| | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ |
| | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ |
| |
| |
| dbg("%s -- %x", __FUNCTION__, result); |
| |
| return result; |
| } |
| |
| static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo) |
| { |
| struct serial_struct tmp; |
| |
| if (!retinfo) |
| return -EFAULT; |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| tmp.type = PORT_16550A; |
| tmp.line = edge_port->port->serial->minor; |
| tmp.port = edge_port->port->number; |
| tmp.irq = 0; |
| tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| tmp.xmit_fifo_size = edge_port->maxTxCredits; |
| tmp.baud_base = 9600; |
| tmp.close_delay = 5*HZ; |
| tmp.closing_wait = 30*HZ; |
| // tmp.custom_divisor = state->custom_divisor; |
| // tmp.hub6 = state->hub6; |
| // tmp.io_type = state->io_type; |
| |
| if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| |
| /***************************************************************************** |
| * SerialIoctl |
| * this function handles any ioctl calls to the driver |
| *****************************************************************************/ |
| static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| DEFINE_WAIT(wait); |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct async_icount cnow; |
| struct async_icount cprev; |
| struct serial_icounter_struct icount; |
| |
| dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); |
| |
| switch (cmd) { |
| // return number of bytes available |
| case TIOCINQ: |
| dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); |
| return get_number_bytes_avail(edge_port, (unsigned int __user *) arg); |
| break; |
| |
| case TIOCSERGETLSR: |
| dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); |
| return get_lsr_info(edge_port, (unsigned int __user *) arg); |
| return 0; |
| |
| case TIOCGSERIAL: |
| dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); |
| return get_serial_info(edge_port, (struct serial_struct __user *) arg); |
| |
| case TIOCSSERIAL: |
| dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); |
| break; |
| |
| case TIOCMIWAIT: |
| dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); |
| cprev = edge_port->icount; |
| while (1) { |
| prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE); |
| schedule(); |
| finish_wait(&edge_port->delta_msr_wait, &wait); |
| /* see if a signal did it */ |
| if (signal_pending(current)) |
| return -ERESTARTSYS; |
| cnow = edge_port->icount; |
| if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) |
| return -EIO; /* no change => error */ |
| if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || |
| ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || |
| ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || |
| ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { |
| return 0; |
| } |
| cprev = cnow; |
| } |
| /* NOTREACHED */ |
| break; |
| |
| case TIOCGICOUNT: |
| cnow = edge_port->icount; |
| memset(&icount, 0, sizeof(icount)); |
| icount.cts = cnow.cts; |
| icount.dsr = cnow.dsr; |
| icount.rng = cnow.rng; |
| icount.dcd = cnow.dcd; |
| icount.rx = cnow.rx; |
| icount.tx = cnow.tx; |
| icount.frame = cnow.frame; |
| icount.overrun = cnow.overrun; |
| icount.parity = cnow.parity; |
| icount.brk = cnow.brk; |
| icount.buf_overrun = cnow.buf_overrun; |
| |
| dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, icount.rx, icount.tx ); |
| if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| return -ENOIOCTLCMD; |
| } |
| |
| |
| /***************************************************************************** |
| * SerialBreak |
| * this function sends a break to the port |
| *****************************************************************************/ |
| static void edge_break (struct usb_serial_port *port, int break_state) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int status; |
| |
| /* flush and chase */ |
| edge_port->chaseResponsePending = TRUE; |
| |
| dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__); |
| status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0); |
| if (status == 0) { |
| // block until chase finished |
| block_until_chase_response(edge_port); |
| } else { |
| edge_port->chaseResponsePending = FALSE; |
| } |
| |
| if (break_state == -1) { |
| dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__); |
| status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0); |
| } else { |
| dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__); |
| status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0); |
| } |
| if (status) { |
| dbg("%s - error sending break set/clear command.", __FUNCTION__); |
| } |
| |
| return; |
| } |
| |
| |
| /***************************************************************************** |
| * process_rcvd_data |
| * this function handles the data received on the bulk in pipe. |
| *****************************************************************************/ |
| static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength) |
| { |
| struct usb_serial_port *port; |
| struct edgeport_port *edge_port; |
| struct tty_struct *tty; |
| __u16 lastBufferLength; |
| __u16 rxLen; |
| |
| dbg("%s", __FUNCTION__); |
| |
| lastBufferLength = bufferLength + 1; |
| |
| while (bufferLength > 0) { |
| /* failsafe incase we get a message that we don't understand */ |
| if (lastBufferLength == bufferLength) { |
| dbg("%s - stuck in loop, exiting it.", __FUNCTION__); |
| break; |
| } |
| lastBufferLength = bufferLength; |
| |
| switch (edge_serial->rxState) { |
| case EXPECT_HDR1: |
| edge_serial->rxHeader1 = *buffer; |
| ++buffer; |
| --bufferLength; |
| |
| if (bufferLength == 0) { |
| edge_serial->rxState = EXPECT_HDR2; |
| break; |
| } |
| /* otherwise, drop on through */ |
| |
| case EXPECT_HDR2: |
| edge_serial->rxHeader2 = *buffer; |
| ++buffer; |
| --bufferLength; |
| |
| dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2); |
| |
| // Process depending on whether this header is |
| // data or status |
| |
| if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { |
| // Decode this status header and goto EXPECT_HDR1 (if we |
| // can process the status with only 2 bytes), or goto |
| // EXPECT_HDR3 to get the third byte. |
| |
| edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); |
| edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1); |
| |
| if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) { |
| // This status needs additional bytes. Save what we have |
| // and then wait for more data. |
| edge_serial->rxStatusParam = edge_serial->rxHeader2; |
| |
| edge_serial->rxState = EXPECT_HDR3; |
| break; |
| } |
| |
| // We have all the header bytes, process the status now |
| process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0); |
| edge_serial->rxState = EXPECT_HDR1; |
| break; |
| } else { |
| edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); |
| edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2); |
| |
| dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining); |
| |
| //ASSERT( DevExt->RxPort < DevExt->NumPorts ); |
| //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH ); |
| |
| if (bufferLength == 0 ) { |
| edge_serial->rxState = EXPECT_DATA; |
| break; |
| } |
| // Else, drop through |
| } |
| |
| case EXPECT_DATA: // Expect data |
| |
| if (bufferLength < edge_serial->rxBytesRemaining) { |
| rxLen = bufferLength; |
| edge_serial->rxState = EXPECT_DATA; // Expect data to start next buffer |
| } else { |
| // BufLen >= RxBytesRemaining |
| rxLen = edge_serial->rxBytesRemaining; |
| edge_serial->rxState = EXPECT_HDR1; // Start another header next time |
| } |
| |
| bufferLength -= rxLen; |
| edge_serial->rxBytesRemaining -= rxLen; |
| |
| /* spit this data back into the tty driver if this port is open */ |
| if (rxLen) { |
| port = edge_serial->serial->port[edge_serial->rxPort]; |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_port->open) { |
| tty = edge_port->port->tty; |
| if (tty) { |
| dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort); |
| edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen); |
| } |
| edge_port->icount.rx += rxLen; |
| } |
| buffer += rxLen; |
| } |
| |
| break; |
| |
| case EXPECT_HDR3: // Expect 3rd byte of status header |
| edge_serial->rxHeader3 = *buffer; |
| ++buffer; |
| --bufferLength; |
| |
| // We have all the header bytes, process the status now |
| process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3); |
| edge_serial->rxState = EXPECT_HDR1; |
| break; |
| |
| } |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * process_rcvd_status |
| * this function handles the any status messages received on the bulk in pipe. |
| *****************************************************************************/ |
| static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3) |
| { |
| struct usb_serial_port *port; |
| struct edgeport_port *edge_port; |
| __u8 code = edge_serial->rxStatusCode; |
| |
| /* switch the port pointer to the one being currently talked about */ |
| port = edge_serial->serial->port[edge_serial->rxPort]; |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_port == NULL) { |
| dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort); |
| return; |
| } |
| |
| dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort); |
| |
| if (code == IOSP_EXT_STATUS) { |
| switch (byte2) { |
| case IOSP_EXT_STATUS_CHASE_RSP: |
| // we want to do EXT status regardless of port open/closed |
| dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 ); |
| // Currently, the only EXT_STATUS is Chase, so process here instead of one more call |
| // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do. |
| // Also, we currently clear flag and close the port regardless of content of above's Byte3. |
| // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport, |
| // like wait longer in block_until_chase_response, but for now we don't. |
| edge_port->chaseResponsePending = FALSE; |
| wake_up (&edge_port->wait_chase); |
| return; |
| |
| case IOSP_EXT_STATUS_RX_CHECK_RSP: |
| dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 ); |
| //Port->RxCheckRsp = TRUE; |
| return; |
| } |
| } |
| |
| if (code == IOSP_STATUS_OPEN_RSP) { |
| edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); |
| edge_port->maxTxCredits = edge_port->txCredits; |
| dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits); |
| handle_new_msr (edge_port, byte2); |
| |
| /* send the current line settings to the port so we are in sync with any further termios calls */ |
| if (edge_port->port->tty) |
| change_port_settings (edge_port, edge_port->port->tty->termios); |
| |
| /* we have completed the open */ |
| edge_port->openPending = FALSE; |
| edge_port->open = TRUE; |
| wake_up(&edge_port->wait_open); |
| return; |
| } |
| |
| // If port is closed, silently discard all rcvd status. We can |
| // have cases where buffered status is received AFTER the close |
| // port command is sent to the Edgeport. |
| if ((!edge_port->open ) || (edge_port->closePending)) { |
| return; |
| } |
| |
| switch (code) { |
| // Not currently sent by Edgeport |
| case IOSP_STATUS_LSR: |
| dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); |
| handle_new_lsr (edge_port, FALSE, byte2, 0); |
| break; |
| |
| case IOSP_STATUS_LSR_DATA: |
| dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); |
| // byte2 is LSR Register |
| // byte3 is broken data byte |
| handle_new_lsr (edge_port, TRUE, byte2, byte3); |
| break; |
| // |
| // case IOSP_EXT_4_STATUS: |
| // dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3); |
| // break; |
| // |
| case IOSP_STATUS_MSR: |
| dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2); |
| |
| // Process this new modem status and generate appropriate |
| // events, etc, based on the new status. This routine |
| // also saves the MSR in Port->ShadowMsr. |
| handle_new_msr(edge_port, byte2); |
| break; |
| |
| default: |
| dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code); |
| break; |
| } |
| |
| return; |
| } |
| |
| |
| /***************************************************************************** |
| * edge_tty_recv |
| * this function passes data on to the tty flip buffer |
| *****************************************************************************/ |
| static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length) |
| { |
| int cnt; |
| |
| do { |
| if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
| tty_flip_buffer_push(tty); |
| if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
| dev_err(dev, "%s - dropping data, %d bytes lost\n", |
| __FUNCTION__, length); |
| return; |
| } |
| } |
| cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count); |
| memcpy(tty->flip.char_buf_ptr, data, cnt); |
| memset(tty->flip.flag_buf_ptr, 0, cnt); |
| tty->flip.char_buf_ptr += cnt; |
| tty->flip.flag_buf_ptr += cnt; |
| tty->flip.count += cnt; |
| data += cnt; |
| length -= cnt; |
| } while (length > 0); |
| |
| tty_flip_buffer_push(tty); |
| } |
| |
| |
| /***************************************************************************** |
| * handle_new_msr |
| * this function handles any change to the msr register for a port. |
| *****************************************************************************/ |
| static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) |
| { |
| struct async_icount *icount; |
| |
| dbg("%s %02x", __FUNCTION__, newMsr); |
| |
| if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { |
| icount = &edge_port->icount; |
| |
| /* update input line counters */ |
| if (newMsr & EDGEPORT_MSR_DELTA_CTS) { |
| icount->cts++; |
| } |
| if (newMsr & EDGEPORT_MSR_DELTA_DSR) { |
| icount->dsr++; |
| } |
| if (newMsr & EDGEPORT_MSR_DELTA_CD) { |
| icount->dcd++; |
| } |
| if (newMsr & EDGEPORT_MSR_DELTA_RI) { |
| icount->rng++; |
| } |
| wake_up_interruptible(&edge_port->delta_msr_wait); |
| } |
| |
| /* Save the new modem status */ |
| edge_port->shadowMSR = newMsr & 0xf0; |
| |
| return; |
| } |
| |
| |
| /***************************************************************************** |
| * handle_new_lsr |
| * this function handles any change to the lsr register for a port. |
| *****************************************************************************/ |
| static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data) |
| { |
| __u8 newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); |
| struct async_icount *icount; |
| |
| dbg("%s - %02x", __FUNCTION__, newLsr); |
| |
| edge_port->shadowLSR = lsr; |
| |
| if (newLsr & LSR_BREAK) { |
| // |
| // Parity and Framing errors only count if they |
| // occur exclusive of a break being |
| // received. |
| // |
| newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); |
| } |
| |
| /* Place LSR data byte into Rx buffer */ |
| if (lsrData && edge_port->port->tty) |
| edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1); |
| |
| /* update input line counters */ |
| icount = &edge_port->icount; |
| if (newLsr & LSR_BREAK) { |
| icount->brk++; |
| } |
| if (newLsr & LSR_OVER_ERR) { |
| icount->overrun++; |
| } |
| if (newLsr & LSR_PAR_ERR) { |
| icount->parity++; |
| } |
| if (newLsr & LSR_FRM_ERR) { |
| icount->frame++; |
| } |
| |
| return; |
| } |
| |
| |
| /**************************************************************************** |
| * sram_write |
| * writes a number of bytes to the Edgeport device's sram starting at the |
| * given address. |
| * If successful returns the number of bytes written, otherwise it returns |
| * a negative error number of the problem. |
| ****************************************************************************/ |
| static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) |
| { |
| int result; |
| __u16 current_length; |
| unsigned char *transfer_buffer; |
| |
| dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); |
| |
| transfer_buffer = kmalloc (64, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); |
| return -ENOMEM; |
| } |
| |
| /* need to split these writes up into 64 byte chunks */ |
| result = 0; |
| while (length > 0) { |
| if (length > 64) { |
| current_length = 64; |
| } else { |
| current_length = length; |
| } |
| // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); |
| memcpy (transfer_buffer, data, current_length); |
| result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM, |
| 0x40, addr, extAddr, transfer_buffer, current_length, 300); |
| if (result < 0) |
| break; |
| length -= current_length; |
| addr += current_length; |
| data += current_length; |
| } |
| |
| kfree (transfer_buffer); |
| return result; |
| } |
| |
| |
| /**************************************************************************** |
| * rom_write |
| * writes a number of bytes to the Edgeport device's ROM starting at the |
| * given address. |
| * If successful returns the number of bytes written, otherwise it returns |
| * a negative error number of the problem. |
| ****************************************************************************/ |
| static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) |
| { |
| int result; |
| __u16 current_length; |
| unsigned char *transfer_buffer; |
| |
| // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); |
| |
| transfer_buffer = kmalloc (64, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); |
| return -ENOMEM; |
| } |
| |
| /* need to split these writes up into 64 byte chunks */ |
| result = 0; |
| while (length > 0) { |
| if (length > 64) { |
| current_length = 64; |
| } else { |
| current_length = length; |
| } |
| // dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); |
| memcpy (transfer_buffer, data, current_length); |
| result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM, |
| 0x40, addr, extAddr, transfer_buffer, current_length, 300); |
| if (result < 0) |
| break; |
| length -= current_length; |
| addr += current_length; |
| data += current_length; |
| } |
| |
| kfree (transfer_buffer); |
| return result; |
| } |
| |
| |
| /**************************************************************************** |
| * rom_read |
| * reads a number of bytes from the Edgeport device starting at the given |
| * address. |
| * If successful returns the number of bytes read, otherwise it returns |
| * a negative error number of the problem. |
| ****************************************************************************/ |
| static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data) |
| { |
| int result; |
| __u16 current_length; |
| unsigned char *transfer_buffer; |
| |
| dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length); |
| |
| transfer_buffer = kmalloc (64, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64); |
| return -ENOMEM; |
| } |
| |
| /* need to split these reads up into 64 byte chunks */ |
| result = 0; |
| while (length > 0) { |
| if (length > 64) { |
| current_length = 64; |
| } else { |
| current_length = length; |
| } |
| // dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length); |
| result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM, |
| 0xC0, addr, extAddr, transfer_buffer, current_length, 300); |
| if (result < 0) |
| break; |
| memcpy (data, transfer_buffer, current_length); |
| length -= current_length; |
| addr += current_length; |
| data += current_length; |
| } |
| |
| kfree (transfer_buffer); |
| return result; |
| } |
| |
| |
| /**************************************************************************** |
| * send_iosp_ext_cmd |
| * Is used to send a IOSP message to the Edgeport device |
| ****************************************************************************/ |
| static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param) |
| { |
| unsigned char *buffer; |
| unsigned char *currentCommand; |
| int length = 0; |
| int status = 0; |
| |
| dbg("%s - %d, %d", __FUNCTION__, command, param); |
| |
| buffer = kmalloc (10, GFP_ATOMIC); |
| if (!buffer) { |
| dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10); |
| return -ENOMEM; |
| } |
| |
| currentCommand = buffer; |
| |
| MAKE_CMD_EXT_CMD (¤tCommand, &length, |
| edge_port->port->number - edge_port->port->serial->minor, |
| command, param); |
| |
| status = write_cmd_usb (edge_port, buffer, length); |
| if (status) { |
| /* something bad happened, let's free up the memory */ |
| kfree(buffer); |
| } |
| |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * write_cmd_usb |
| * this function writes the given buffer out to the bulk write endpoint. |
| *****************************************************************************/ |
| static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length) |
| { |
| struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial); |
| int status = 0; |
| struct urb *urb; |
| int timeout; |
| |
| usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer); |
| |
| /* Allocate our next urb */ |
| urb = usb_alloc_urb (0, GFP_ATOMIC); |
| if (!urb) |
| return -ENOMEM; |
| |
| CmdUrbs++; |
| dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs); |
| |
| usb_fill_bulk_urb (urb, edge_serial->serial->dev, |
| usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint), |
| buffer, length, edge_bulk_out_cmd_callback, edge_port); |
| |
| edge_port->commandPending = TRUE; |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| |
| if (status) { |
| /* something went wrong */ |
| dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status); |
| usb_kill_urb(urb); |
| usb_free_urb(urb); |
| CmdUrbs--; |
| return status; |
| } |
| |
| // wait for command to finish |
| timeout = COMMAND_TIMEOUT; |
| #if 0 |
| wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE)); |
| |
| if (edge_port->commandPending == TRUE) { |
| /* command timed out */ |
| dbg("%s - command timed out", __FUNCTION__); |
| status = -EINVAL; |
| } |
| #endif |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * send_cmd_write_baud_rate |
| * this function sends the proper command to change the baud rate of the |
| * specified port. |
| *****************************************************************************/ |
| static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate) |
| { |
| unsigned char *cmdBuffer; |
| unsigned char *currCmd; |
| int cmdLen = 0; |
| int divisor; |
| int status; |
| unsigned char number = edge_port->port->number - edge_port->port->serial->minor; |
| |
| dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate); |
| |
| status = calc_baud_rate_divisor (baudRate, &divisor); |
| if (status) { |
| dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__); |
| return status; |
| } |
| |
| // Alloc memory for the string of commands. |
| cmdBuffer = kmalloc (0x100, GFP_ATOMIC); |
| if (!cmdBuffer) { |
| dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100); |
| return -ENOMEM; |
| } |
| currCmd = cmdBuffer; |
| |
| // Enable access to divisor latch |
| MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE ); |
| |
| // Write the divisor itself |
| MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) ); |
| MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) ); |
| |
| // Restore original value to disable access to divisor latch |
| MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR); |
| |
| status = write_cmd_usb(edge_port, cmdBuffer, cmdLen ); |
| if (status) { |
| /* something bad happened, let's free up the memory */ |
| kfree (cmdBuffer); |
| } |
| |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * calc_baud_rate_divisor |
| * this function calculates the proper baud rate divisor for the specified |
| * baud rate. |
| *****************************************************************************/ |
| static int calc_baud_rate_divisor (int baudrate, int *divisor) |
| { |
| int i; |
| __u16 custom; |
| |
| |
| dbg("%s - %d", __FUNCTION__, baudrate); |
| |
| for (i = 0; i < NUM_ENTRIES(divisor_table); i++) { |
| if ( divisor_table[i].BaudRate == baudrate ) { |
| *divisor = divisor_table[i].Divisor; |
| return 0; |
| } |
| } |
| |
| // We have tried all of the standard baud rates |
| // lets try to calculate the divisor for this baud rate |
| // Make sure the baud rate is reasonable |
| if (baudrate > 50 && baudrate < 230400) { |
| // get divisor |
| custom = (__u16)((230400L + baudrate/2) / baudrate); |
| |
| *divisor = custom; |
| |
| dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom); |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| |
| /***************************************************************************** |
| * send_cmd_write_uart_register |
| * this function builds up a uart register message and sends to to the device. |
| *****************************************************************************/ |
| static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue) |
| { |
| unsigned char *cmdBuffer; |
| unsigned char *currCmd; |
| unsigned long cmdLen = 0; |
| int status; |
| |
| dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue); |
| |
| // Alloc memory for the string of commands. |
| cmdBuffer = kmalloc (0x10, GFP_ATOMIC); |
| if (cmdBuffer == NULL ) { |
| return -ENOMEM; |
| } |
| |
| currCmd = cmdBuffer; |
| |
| // Build a cmd in the buffer to write the given register |
| MAKE_CMD_WRITE_REG (&currCmd, &cmdLen, |
| edge_port->port->number - edge_port->port->serial->minor, |
| regNum, regValue); |
| |
| status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); |
| if (status) { |
| /* something bad happened, let's free up the memory */ |
| kfree (cmdBuffer); |
| } |
| |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * change_port_settings |
| * This routine is called to set the UART on the device to match the specified |
| * new settings. |
| *****************************************************************************/ |
| #ifndef CMSPAR |
| #define CMSPAR 0 |
| #endif |
| static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios) |
| { |
| struct tty_struct *tty; |
| int baud; |
| unsigned cflag; |
| __u8 mask = 0xff; |
| __u8 lData; |
| __u8 lParity; |
| __u8 lStop; |
| __u8 rxFlow; |
| __u8 txFlow; |
| int status; |
| |
| dbg("%s - port %d", __FUNCTION__, edge_port->port->number); |
| |
| if ((!edge_port->open) && |
| (!edge_port->openPending)) { |
| dbg("%s - port not opened", __FUNCTION__); |
| return; |
| } |
| |
| tty = edge_port->port->tty; |
| if ((!tty) || |
| (!tty->termios)) { |
| dbg("%s - no tty structures", __FUNCTION__); |
| return; |
| } |
| |
| cflag = tty->termios->c_cflag; |
| |
| switch (cflag & CSIZE) { |
| case CS5: lData = LCR_BITS_5; mask = 0x1f; dbg("%s - data bits = 5", __FUNCTION__); break; |
| case CS6: lData = LCR_BITS_6; mask = 0x3f; dbg("%s - data bits = 6", __FUNCTION__); break; |
| case CS7: lData = LCR_BITS_7; mask = 0x7f; dbg("%s - data bits = 7", __FUNCTION__); break; |
| default: |
| case CS8: lData = LCR_BITS_8; dbg("%s - data bits = 8", __FUNCTION__); break; |
| } |
| |
| lParity = LCR_PAR_NONE; |
| if (cflag & PARENB) { |
| if (cflag & CMSPAR) { |
| if (cflag & PARODD) { |
| lParity = LCR_PAR_MARK; |
| dbg("%s - parity = mark", __FUNCTION__); |
| } else { |
| lParity = LCR_PAR_SPACE; |
| dbg("%s - parity = space", __FUNCTION__); |
| } |
| } else if (cflag & PARODD) { |
| lParity = LCR_PAR_ODD; |
| dbg("%s - parity = odd", __FUNCTION__); |
| } else { |
| lParity = LCR_PAR_EVEN; |
| dbg("%s - parity = even", __FUNCTION__); |
| } |
| } else { |
| dbg("%s - parity = none", __FUNCTION__); |
| } |
| |
| if (cflag & CSTOPB) { |
| lStop = LCR_STOP_2; |
| dbg("%s - stop bits = 2", __FUNCTION__); |
| } else { |
| lStop = LCR_STOP_1; |
| dbg("%s - stop bits = 1", __FUNCTION__); |
| } |
| |
| /* figure out the flow control settings */ |
| rxFlow = txFlow = 0x00; |
| if (cflag & CRTSCTS) { |
| rxFlow |= IOSP_RX_FLOW_RTS; |
| txFlow |= IOSP_TX_FLOW_CTS; |
| dbg("%s - RTS/CTS is enabled", __FUNCTION__); |
| } else { |
| dbg("%s - RTS/CTS is disabled", __FUNCTION__); |
| } |
| |
| /* if we are implementing XON/XOFF, set the start and stop character in the device */ |
| if (I_IXOFF(tty) || I_IXON(tty)) { |
| unsigned char stop_char = STOP_CHAR(tty); |
| unsigned char start_char = START_CHAR(tty); |
| |
| send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char); |
| send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char); |
| |
| /* if we are implementing INBOUND XON/XOFF */ |
| if (I_IXOFF(tty)) { |
| rxFlow |= IOSP_RX_FLOW_XON_XOFF; |
| dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); |
| } else { |
| dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__); |
| } |
| |
| /* if we are implementing OUTBOUND XON/XOFF */ |
| if (I_IXON(tty)) { |
| txFlow |= IOSP_TX_FLOW_XON_XOFF; |
| dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char); |
| } else { |
| dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__); |
| } |
| } |
| |
| /* Set flow control to the configured value */ |
| send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); |
| send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); |
| |
| |
| edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
| edge_port->shadowLCR |= (lData | lParity | lStop); |
| |
| edge_port->validDataMask = mask; |
| |
| /* Send the updated LCR value to the EdgePort */ |
| status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR); |
| if (status != 0) { |
| return; |
| } |
| |
| /* set up the MCR register and send it to the EdgePort */ |
| edge_port->shadowMCR = MCR_MASTER_IE; |
| if (cflag & CBAUD) { |
| edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
| } |
| status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); |
| if (status != 0) { |
| return; |
| } |
| |
| /* Determine divisor based on baud rate */ |
| baud = tty_get_baud_rate(tty); |
| if (!baud) { |
| /* pick a default, any default... */ |
| baud = 9600; |
| } |
| |
| dbg("%s - baud rate = %d", __FUNCTION__, baud); |
| status = send_cmd_write_baud_rate (edge_port, baud); |
| |
| return; |
| } |
| |
| |
| /**************************************************************************** |
| * unicode_to_ascii |
| * Turns a string from Unicode into ASCII. |
| * Doesn't do a good job with any characters that are outside the normal |
| * ASCII range, but it's only for debugging... |
| * NOTE: expects the unicode in LE format |
| ****************************************************************************/ |
| static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size) |
| { |
| int i; |
| |
| if (unicode_size <= 0) |
| return; |
| |
| for (i = 0; i < unicode_size; ++i) |
| string[i] = (char)(le16_to_cpu(unicode[i])); |
| string[unicode_size] = 0x00; |
| } |
| |
| |
| /**************************************************************************** |
| * get_manufacturing_desc |
| * reads in the manufacturing descriptor and stores it into the serial |
| * structure. |
| ****************************************************************************/ |
| static void get_manufacturing_desc (struct edgeport_serial *edge_serial) |
| { |
| int response; |
| |
| dbg("getting manufacturer descriptor"); |
| |
| response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, |
| (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN, |
| (__u8 *)(&edge_serial->manuf_descriptor)); |
| |
| if (response < 1) { |
| dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n"); |
| } else { |
| char string[30]; |
| dbg("**Manufacturer Descriptor"); |
| dbg(" RomSize: %dK", edge_serial->manuf_descriptor.RomSize); |
| dbg(" RamSize: %dK", edge_serial->manuf_descriptor.RamSize); |
| dbg(" CpuRev: %d", edge_serial->manuf_descriptor.CpuRev); |
| dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); |
| dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); |
| dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); |
| unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1); |
| dbg(" SerialNumber: %s", string); |
| unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1); |
| dbg(" AssemblyNumber: %s", string); |
| unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1); |
| dbg(" OemAssyNumber: %s", string); |
| dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); |
| dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); |
| dbg(" IonConfig: %d", edge_serial->manuf_descriptor.IonConfig); |
| } |
| } |
| |
| |
| /**************************************************************************** |
| * get_boot_desc |
| * reads in the bootloader descriptor and stores it into the serial |
| * structure. |
| ****************************************************************************/ |
| static void get_boot_desc (struct edgeport_serial *edge_serial) |
| { |
| int response; |
| |
| dbg("getting boot descriptor"); |
| |
| response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, |
| (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN, |
| (__u8 *)(&edge_serial->boot_descriptor)); |
| |
| if (response < 1) { |
| dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n"); |
| } else { |
| dbg("**Boot Descriptor:"); |
| dbg(" BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); |
| dbg(" MajorVersion: %d", edge_serial->boot_descriptor.MajorVersion); |
| dbg(" MinorVersion: %d", edge_serial->boot_descriptor.MinorVersion); |
| dbg(" BuildNumber: %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); |
| dbg(" Capabilities: 0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); |
| dbg(" UConfig0: %d", edge_serial->boot_descriptor.UConfig0); |
| dbg(" UConfig1: %d", edge_serial->boot_descriptor.UConfig1); |
| } |
| } |
| |
| |
| /**************************************************************************** |
| * load_application_firmware |
| * This is called to load the application firmware to the device |
| ****************************************************************************/ |
| static void load_application_firmware (struct edgeport_serial *edge_serial) |
| { |
| struct edge_firmware_image_record *record; |
| unsigned char *firmware; |
| unsigned char *FirmwareImage; |
| int ImageSize; |
| int response; |
| |
| |
| switch (edge_serial->product_info.iDownloadFile) { |
| case EDGE_DOWNLOAD_FILE_I930: |
| dbg("downloading firmware version (930) %d.%d.%d", |
| OperationalCodeImageVersion_GEN1.MajorVersion, |
| OperationalCodeImageVersion_GEN1.MinorVersion, |
| OperationalCodeImageVersion_GEN1.BuildNumber); |
| firmware = &OperationalCodeImage_GEN1[0]; |
| FirmwareImage = &OperationalCodeImage_GEN1[0]; |
| ImageSize = sizeof(OperationalCodeImage_GEN1); |
| break; |
| |
| case EDGE_DOWNLOAD_FILE_80251: |
| dbg("downloading firmware version (80251) %d.%d.%d", |
| OperationalCodeImageVersion_GEN2.MajorVersion, |
| OperationalCodeImageVersion_GEN2.MinorVersion, |
| OperationalCodeImageVersion_GEN2.BuildNumber); |
| firmware = &OperationalCodeImage_GEN2[0]; |
| FirmwareImage = &OperationalCodeImage_GEN2[0]; |
| ImageSize = sizeof(OperationalCodeImage_GEN2); |
| break; |
| |
| case EDGE_DOWNLOAD_FILE_NONE: |
| dbg ("No download file specified, skipping download\n"); |
| return; |
| |
| default: |
| return; |
| } |
| |
| |
| for (;;) { |
| record = (struct edge_firmware_image_record *)firmware; |
| response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]); |
| if (response < 0) { |
| dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len)); |
| break; |
| } |
| firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len); |
| if (firmware >= &FirmwareImage[ImageSize]) { |
| break; |
| } |
| } |
| |
| dbg("sending exec_dl_code"); |
| response = usb_control_msg (edge_serial->serial->dev, |
| usb_sndctrlpipe(edge_serial->serial->dev, 0), |
| USB_REQUEST_ION_EXEC_DL_CODE, |
| 0x40, 0x4000, 0x0001, NULL, 0, 3000); |
| |
| return; |
| } |
| |
| |
| /**************************************************************************** |
| * edge_startup |
| ****************************************************************************/ |
| static int edge_startup (struct usb_serial *serial) |
| { |
| struct edgeport_serial *edge_serial; |
| struct edgeport_port *edge_port; |
| struct usb_device *dev; |
| int i; |
| |
| dev = serial->dev; |
| |
| /* create our private serial structure */ |
| edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL); |
| if (edge_serial == NULL) { |
| dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); |
| return -ENOMEM; |
| } |
| memset (edge_serial, 0, sizeof(struct edgeport_serial)); |
| spin_lock_init(&edge_serial->es_lock); |
| edge_serial->serial = serial; |
| usb_set_serial_data(serial, edge_serial); |
| |
| /* get the name for the device from the device */ |
| if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) { |
| edge_serial->name[i-1] = ' '; |
| } |
| |
| get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]); |
| |
| dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); |
| |
| /* get the manufacturing descriptor for this device */ |
| get_manufacturing_desc (edge_serial); |
| |
| /* get the boot descriptor */ |
| get_boot_desc (edge_serial); |
| |
| get_product_info(edge_serial); |
| |
| /* set the number of ports from the manufacturing description */ |
| /* serial->num_ports = serial->product_info.NumPorts; */ |
| if (edge_serial->product_info.NumPorts != serial->num_ports) { |
| warn("%s - Device Reported %d serial ports vs core " |
| "thinking we have %d ports, email greg@kroah.com this info.", |
| __FUNCTION__, edge_serial->product_info.NumPorts, |
| serial->num_ports); |
| } |
| |
| dbg("%s - time 1 %ld", __FUNCTION__, jiffies); |
| |
| /* now load the application firmware into this device */ |
| load_application_firmware (edge_serial); |
| |
| dbg("%s - time 2 %ld", __FUNCTION__, jiffies); |
| |
| /* Check current Edgeport EEPROM and update if necessary */ |
| update_edgeport_E2PROM (edge_serial); |
| |
| dbg("%s - time 3 %ld", __FUNCTION__, jiffies); |
| |
| /* set the configuration to use #1 */ |
| // dbg("set_configuration 1"); |
| // usb_set_configuration (dev, 1); |
| |
| /* we set up the pointers to the endpoints in the edge_open function, |
| * as the structures aren't created yet. */ |
| |
| /* set up our port private structures */ |
| for (i = 0; i < serial->num_ports; ++i) { |
| edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); |
| if (edge_port == NULL) { |
| dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); |
| usb_set_serial_data(serial, NULL); |
| kfree(edge_serial); |
| return -ENOMEM; |
| } |
| memset (edge_port, 0, sizeof(struct edgeport_port)); |
| spin_lock_init(&edge_port->ep_lock); |
| edge_port->port = serial->port[i]; |
| usb_set_serial_port_data(serial->port[i], edge_port); |
| } |
| |
| return 0; |
| } |
| |
| |
| /**************************************************************************** |
| * edge_shutdown |
| * This function is called whenever the device is removed from the usb bus. |
| ****************************************************************************/ |
| static void edge_shutdown (struct usb_serial *serial) |
| { |
| int i; |
| |
| dbg("%s", __FUNCTION__); |
| |
| /* stop reads and writes on all ports */ |
| for (i=0; i < serial->num_ports; ++i) { |
| kfree (usb_get_serial_port_data(serial->port[i])); |
| usb_set_serial_port_data(serial->port[i], NULL); |
| } |
| kfree (usb_get_serial_data(serial)); |
| usb_set_serial_data(serial, NULL); |
| } |
| |
| |
| /**************************************************************************** |
| * edgeport_init |
| * This is called by the module subsystem, or on startup to initialize us |
| ****************************************************************************/ |
| static int __init edgeport_init(void) |
| { |
| int retval; |
| |
| retval = usb_serial_register(&edgeport_2port_device); |
| if (retval) |
| goto failed_2port_device_register; |
| retval = usb_serial_register(&edgeport_4port_device); |
| if (retval) |
| goto failed_4port_device_register; |
| retval = usb_serial_register(&edgeport_8port_device); |
| if (retval) |
| goto failed_8port_device_register; |
| retval = usb_register(&io_driver); |
| if (retval) |
| goto failed_usb_register; |
| info(DRIVER_DESC " " DRIVER_VERSION); |
| return 0; |
| |
| failed_usb_register: |
| usb_serial_deregister(&edgeport_8port_device); |
| failed_8port_device_register: |
| usb_serial_deregister(&edgeport_4port_device); |
| failed_4port_device_register: |
| usb_serial_deregister(&edgeport_2port_device); |
| failed_2port_device_register: |
| return retval; |
| } |
| |
| |
| /**************************************************************************** |
| * edgeport_exit |
| * Called when the driver is about to be unloaded. |
| ****************************************************************************/ |
| static void __exit edgeport_exit (void) |
| { |
| usb_deregister (&io_driver); |
| usb_serial_deregister (&edgeport_2port_device); |
| usb_serial_deregister (&edgeport_4port_device); |
| usb_serial_deregister (&edgeport_8port_device); |
| } |
| |
| module_init(edgeport_init); |
| module_exit(edgeport_exit); |
| |
| /* Module information */ |
| 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(low_latency, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); |