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linux/drivers/usb/serial/io_edgeport.c
Oliver Neukum 2400a2bfbd USB: removal of tty->low_latency hack dating back to the old serial code 
This removes tty->low_latency from all USB serial drivers that push
data into the tty layer at hard interrupt context. It's no longer needed
and actually harmful.

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-04-23 14:15:29 -07:00

3297 lines
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/*
* 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>.
*
*/
#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 <linux/firmware.h>
#include <linux/ihex.h>
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/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"
#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 */
bool 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;
bool open;
bool openPending;
bool commandPending;
bool closePending;
bool 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+2]; /* 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 */
struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */
int is_epic; /* flag if EPiC device or not */
__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 */
bool 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 const 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 atomic_t CmdUrbs; /* Number of outstanding Command Write Urbs */
/* local function prototypes */
/* function prototypes for all URB callbacks */
static void edge_interrupt_callback(struct urb *urb);
static void edge_bulk_in_callback(struct urb *urb);
static void edge_bulk_out_data_callback(struct urb *urb);
static void edge_bulk_out_cmd_callback(struct urb *urb);
/* function prototypes for the usbserial callbacks */
static int edge_open(struct tty_struct *tty, struct usb_serial_port *port,
struct file *filp);
static void edge_close(struct tty_struct *tty, struct usb_serial_port *port,
struct file *filp);
static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
const unsigned char *buf, int count);
static int edge_write_room(struct tty_struct *tty);
static int edge_chars_in_buffer(struct tty_struct *tty);
static void edge_throttle(struct tty_struct *tty);
static void edge_unthrottle(struct tty_struct *tty);
static void edge_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
struct ktermios *old_termios);
static int edge_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
static void edge_break(struct tty_struct *tty, int break_state);
static int edge_tiocmget(struct tty_struct *tty, struct file *file);
static int edge_tiocmset(struct tty_struct *tty, 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 */
/* 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 tty_struct *tty,
struct edgeport_port *edge_port,
struct ktermios *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, const __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, const __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, int buflen,
__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;
__u16 BootBuildNumber;
__u32 Bootaddr;
const struct ihex_binrec *rec;
const struct firmware *fw;
const char *fw_name;
int response;
switch (edge_serial->product_info.iDownloadFile) {
case EDGE_DOWNLOAD_FILE_I930:
fw_name = "edgeport/boot.fw";
break;
case EDGE_DOWNLOAD_FILE_80251:
fw_name = "edgeport/boot2.fw";
break;
default:
return;
}
response = request_ihex_firmware(&fw, fw_name,
&edge_serial->serial->dev->dev);
if (response) {
printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
fw_name, response);
return;
}
rec = (const struct ihex_binrec *)fw->data;
BootMajorVersion = rec->data[0];
BootMinorVersion = rec->data[1];
BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
/* 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) +
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, BootBuildNumber);
dbg("Downloading new Boot Image");
for (rec = ihex_next_binrec(rec); rec;
rec = ihex_next_binrec(rec)) {
Bootaddr = be32_to_cpu(rec->addr);
response = rom_write(edge_serial->serial,
Bootaddr >> 16,
Bootaddr & 0xFFFF,
be16_to_cpu(rec->len),
&rec->data[0]);
if (response < 0) {
dev_err(&edge_serial->serial->dev->dev,
"rom_write failed (%x, %x, %d)\n",
Bootaddr >> 16, Bootaddr & 0xFFFF,
be16_to_cpu(rec->len));
break;
}
}
} else {
dbg("Boot Image -- already up to date");
}
release_firmware(fw);
}
/************************************************************************
* *
* Get string descriptor from device *
* *
************************************************************************/
static int get_string(struct usb_device *dev, int Id, char *string, int buflen)
{
struct usb_string_descriptor StringDesc;
struct usb_string_descriptor *pStringDesc;
dbg("%s - USB String ID = %d", __func__, 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, buflen,
pStringDesc->wData, pStringDesc->bLength/2);
kfree(pStringDesc);
dbg("%s - USB String %s", __func__, string);
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", __func__, 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 dump_product_info(struct edgeport_product_info *product_info)
{
/* 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);
dbg(" EpicVer %d", product_info->EpicVer);
}
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->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
else
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(product_info);
}
static int get_epic_descriptor(struct edgeport_serial *ep)
{
int result;
struct usb_serial *serial = ep->serial;
struct edgeport_product_info *product_info = &ep->product_info;
struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
struct edge_compatibility_bits *bits;
ep->is_epic = 0;
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
USB_REQUEST_ION_GET_EPIC_DESC,
0xC0, 0x00, 0x00,
&ep->epic_descriptor,
sizeof(struct edge_compatibility_descriptor),
300);
dbg("%s result = %d", __func__, result);
if (result > 0) {
ep->is_epic = 1;
memset(product_info, 0, sizeof(struct edgeport_product_info));
product_info->NumPorts = epic->NumPorts;
product_info->ProdInfoVer = 0;
product_info->FirmwareMajorVersion = epic->MajorVersion;
product_info->FirmwareMinorVersion = epic->MinorVersion;
product_info->FirmwareBuildNumber = epic->BuildNumber;
product_info->iDownloadFile = epic->iDownloadFile;
product_info->EpicVer = epic->EpicVer;
product_info->Epic = epic->Supports;
product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
dump_product_info(product_info);
bits = &ep->epic_descriptor.Supports;
dbg("**EPIC descriptor:");
dbg(" VendEnableSuspend: %s", bits->VendEnableSuspend ? "TRUE": "FALSE");
dbg(" IOSPOpen : %s", bits->IOSPOpen ? "TRUE": "FALSE");
dbg(" IOSPClose : %s", bits->IOSPClose ? "TRUE": "FALSE");
dbg(" IOSPChase : %s", bits->IOSPChase ? "TRUE": "FALSE");
dbg(" IOSPSetRxFlow : %s", bits->IOSPSetRxFlow ? "TRUE": "FALSE");
dbg(" IOSPSetTxFlow : %s", bits->IOSPSetTxFlow ? "TRUE": "FALSE");
dbg(" IOSPSetXChar : %s", bits->IOSPSetXChar ? "TRUE": "FALSE");
dbg(" IOSPRxCheck : %s", bits->IOSPRxCheck ? "TRUE": "FALSE");
dbg(" IOSPSetClrBreak : %s", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
dbg(" IOSPWriteMCR : %s", bits->IOSPWriteMCR ? "TRUE": "FALSE");
dbg(" IOSPWriteLCR : %s", bits->IOSPWriteLCR ? "TRUE": "FALSE");
dbg(" IOSPSetBaudRate : %s", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
dbg(" TrueEdgeport : %s", bits->TrueEdgeport ? "TRUE": "FALSE");
}
return result;
}
/************************************************************************/
/************************************************************************/
/* 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 edgeport_serial *edge_serial = urb->context;
struct edgeport_port *edge_port;
struct usb_serial_port *port;
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
int length = urb->actual_length;
int bytes_avail;
int position;
int txCredits;
int portNumber;
int result;
int status = urb->status;
dbg("%s", __func__);
switch (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",
__func__, status);
return;
default:
dbg("%s - nonzero urb status received: %d", __func__, 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,
__func__, 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", __func__, 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", __func__);
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", __func__, 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",
__func__, portNumber,
edge_port->txCredits);
/* tell the tty driver that something
has changed */
tty = tty_port_tty_get(
&edge_port->port->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(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",
__func__, 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 edgeport_serial *edge_serial = urb->context;
unsigned char *data = urb->transfer_buffer;
int retval;
__u16 raw_data_length;
int status = urb->status;
dbg("%s", __func__);
if (status) {
dbg("%s - nonzero read bulk status received: %d",
__func__, status);
edge_serial->read_in_progress = false;
return;
}
if (urb->actual_length == 0) {
dbg("%s - read bulk callback with no data", __func__);
edge_serial->read_in_progress = false;
return;
}
raw_data_length = urb->actual_length;
usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
__func__, 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", __func__,
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", __func__);
edge_serial->read_urb->dev = edge_serial->serial->dev;
retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
if (retval) {
dev_err(&urb->dev->dev,
"%s - usb_submit_urb(read bulk) failed, "
"retval = %d\n", __func__, retval);
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 edgeport_port *edge_port = urb->context;
struct tty_struct *tty;
int status = urb->status;
dbg("%s", __func__);
if (status) {
dbg("%s - nonzero write bulk status received: %d",
__func__, status);
}
tty = tty_port_tty_get(&edge_port->port->port);
if (tty && edge_port->open) {
/* let the tty driver wakeup if it has a special
write_wakeup function */
tty_wakeup(tty);
}
tty_kref_put(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 edgeport_port *edge_port = urb->context;
struct tty_struct *tty;
int status = urb->status;
dbg("%s", __func__);
atomic_dec(&CmdUrbs);
dbg("%s - FREE URB %p (outstanding %d)", __func__,
urb, atomic_read(&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",
__func__, status);
return;
}
/* Get pointer to tty */
tty = tty_port_tty_get(&edge_port->port->port);
/* tell the tty driver that something has changed */
if (tty && edge_port->open)
tty_wakeup(tty);
tty_kref_put(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 tty_struct *tty,
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", __func__, port->number);
if (edge_port == NULL)
return -ENODEV;
/* 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",
__func__, 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 */
/* Must always set this bit to enable ints! */
edge_port->shadowMCR = MCR_MASTER_IE;
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",
__func__);
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,
OPEN_TIMEOUT);
if (!edge_port->open) {
/* open timed out */
dbg("%s - open timedout", __func__);
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", __func__);
edge_close(tty, 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", __func__);
edge_close(tty, port, filp);
return -ENOMEM;
}
dbg("%s(%d) - Initialize TX fifo to %d bytes",
__func__, port->number, edge_port->maxTxCredits);
dbg("%s exited", __func__);
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 timeout 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) {
dbg("%s - Got Chase Response", __func__);
/* did we get all of our credit back? */
if (edge_port->txCredits == edge_port->maxTxCredits) {
dbg("%s - Got all credits", __func__);
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", __func__);
return;
}
} else {
/* Reset timeout value back to 10 seconds */
dbg("%s - Last %d, Current %d", __func__,
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 timeout 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", __func__);
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", __func__);
if (lastCount == fifo->count) {
/* No activity.. count down. */
loop--;
if (loop == 0) {
dbg("%s - TIMEOUT", __func__);
return;
}
} else {
/* Reset timeout 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 tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
struct edgeport_serial *edge_serial;
struct edgeport_port *edge_port;
int status;
dbg("%s - port %d", __func__, 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;
if ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPChase))) {
/* flush and chase */
edge_port->chaseResponsePending = true;
dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
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 ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPClose))) {
/* close the port */
dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
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;
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", __func__);
}
/*****************************************************************************
* 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 tty_struct *tty, 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", __func__, 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",
__func__, 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", __func__);
goto finish_write;
}
/* queue the data
* since we can never overflow the buffer we do not have to check for a
* 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 ", __func__,
firsthalf, bytesleft);
/* now copy our data */
memcpy(&fifo->fifo[fifo->head], data, firsthalf);
usb_serial_debug_data(debug, &port->dev, __func__,
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", __func__, secondhalf);
memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
usb_serial_debug_data(debug, &port->dev, __func__,
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
* the 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", __func__,
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)", __func__, 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",
__func__, 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",
__func__, 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", __func__);
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,
__func__, 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",
__func__, 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",
__func__, 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 tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int room;
unsigned long flags;
dbg("%s", __func__);
if (edge_port == NULL)
return 0;
if (edge_port->closePending)
return 0;
dbg("%s - port %d", __func__, port->number);
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
return 0;
}
/* 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", __func__, 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 tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int num_chars;
unsigned long flags;
dbg("%s", __func__);
if (edge_port == NULL)
return 0;
if (edge_port->closePending)
return 0;
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
return 0;
}
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", __func__,
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 tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int status;
dbg("%s - port %d", __func__, port->number);
if (edge_port == NULL)
return;
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
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(tty, 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 tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int status;
dbg("%s - port %d", __func__, port->number);
if (edge_port == NULL)
return;
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
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(tty, 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;
send_cmd_write_uart_register(edge_port, MCR,
edge_port->shadowMCR);
}
}
/*****************************************************************************
* SerialSetTermios
* this function is called by the tty driver when it wants to change
* the termios structure
*****************************************************************************/
static void edge_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
unsigned int cflag;
cflag = tty->termios->c_cflag;
dbg("%s - clfag %08x iflag %08x", __func__,
tty->termios->c_cflag, tty->termios->c_iflag);
dbg("%s - old clfag %08x old iflag %08x", __func__,
old_termios->c_cflag, old_termios->c_iflag);
dbg("%s - port %d", __func__, port->number);
if (edge_port == NULL)
return;
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
return;
}
/* change the port settings to the new ones specified */
change_port_settings(tty, edge_port, old_termios);
}
/*****************************************************************************
* 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", __func__);
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 edge_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
struct usb_serial_port *port = tty->driver_data;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
unsigned int mcr;
dbg("%s - port %d", __func__, 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 tty_struct *tty, struct file *file)
{
struct usb_serial_port *port = tty->driver_data;
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", __func__, 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", __func__, 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;
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 tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct usb_serial_port *port = tty->driver_data;
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", __func__, port->number, cmd);
switch (cmd) {
case TIOCSERGETLSR:
dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
return get_lsr_info(edge_port, (unsigned int __user *) arg);
case TIOCGSERIAL:
dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
return get_serial_info(edge_port, (struct serial_struct __user *) arg);
case TIOCMIWAIT:
dbg("%s (%d) TIOCMIWAIT", __func__, 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",
__func__, 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 tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
int status;
if ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPChase))) {
/* flush and chase */
edge_port->chaseResponsePending = true;
dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
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 ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
if (break_state == -1) {
dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
status = send_iosp_ext_cmd(edge_port,
IOSP_CMD_SET_BREAK, 0);
} else {
dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
status = send_iosp_ext_cmd(edge_port,
IOSP_CMD_CLEAR_BREAK, 0);
}
if (status)
dbg("%s - error sending break set/clear command.",
__func__);
}
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", __func__);
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.", __func__);
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", __func__,
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 go to
* EXPECT_HDR1 (if we can process the status
* with only 2 bytes), or go to 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",
__func__,
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;
/* Expect data to start next buffer */
edge_serial->rxState = EXPECT_DATA;
} else {
/* BufLen >= RxBytesRemaining */
rxLen = edge_serial->rxBytesRemaining;
/* Start another header next time */
edge_serial->rxState = EXPECT_HDR1;
}
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 = tty_port_tty_get(
&edge_port->port->port);
if (tty) {
dbg("%s - Sending %d bytes to TTY for port %d",
__func__, rxLen, edge_serial->rxPort);
edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
tty_kref_put(tty);
}
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;
struct tty_struct *tty;
__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",
__func__, edge_serial->rxPort);
return;
}
dbg("%s - port %d", __func__, 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",
__func__, 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", __func__, 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", __func__, 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 */
tty = tty_port_tty_get(&edge_port->port->port);
if (tty) {
change_port_settings(tty,
edge_port, tty->termios);
tty_kref_put(tty);
}
/* 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",
__func__, 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",
__func__, 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",
* __func__, edge_serial->rxPort, byte2, byte3);
* break;
*/
case IOSP_STATUS_MSR:
dbg("%s - Port %u MSR Status = %02x",
__func__, 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", __func__, 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 {
cnt = tty_buffer_request_room(tty, length);
if (cnt < length) {
dev_err(dev, "%s - dropping data, %d bytes lost\n",
__func__, length - cnt);
if (cnt == 0)
break;
}
tty_insert_flip_string(tty, data, 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", __func__, 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", __func__, 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) {
struct tty_struct *tty =
tty_port_tty_get(&edge_port->port->port);
if (tty) {
edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
tty_kref_put(tty);
}
}
/* 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, const __u8 *data)
{
int result;
__u16 current_length;
unsigned char *transfer_buffer;
dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
transfer_buffer = kmalloc(64, GFP_KERNEL);
if (!transfer_buffer) {
dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
__func__, 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", __func__,
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, const __u8 *data)
{
int result;
__u16 current_length;
unsigned char *transfer_buffer;
/* dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
transfer_buffer = kmalloc(64, GFP_KERNEL);
if (!transfer_buffer) {
dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
__func__, 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", __func__,
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", __func__, extAddr, addr, length);
transfer_buffer = kmalloc(64, GFP_KERNEL);
if (!transfer_buffer) {
dev_err(&serial->dev->dev,
"%s - kmalloc(%d) failed.\n", __func__, 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", __func__,
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", __func__, command, param);
buffer = kmalloc(10, GFP_ATOMIC);
if (!buffer) {
dev_err(&edge_port->port->dev,
"%s - kmalloc(%d) failed.\n", __func__, 10);
return -ENOMEM;
}
currentCommand = buffer;
MAKE_CMD_EXT_CMD(&currentCommand, &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,
__func__, length, buffer);
/* Allocate our next urb */
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb)
return -ENOMEM;
atomic_inc(&CmdUrbs);
dbg("%s - ALLOCATE URB %p (outstanding %d)",
__func__, urb, atomic_read(&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",
__func__, status);
usb_kill_urb(urb);
usb_free_urb(urb);
atomic_dec(&CmdUrbs);
return status;
}
/* wait for command to finish */
timeout = COMMAND_TIMEOUT;
#if 0
wait_event(&edge_port->wait_command, !edge_port->commandPending);
if (edge_port->commandPending) {
/* command timed out */
dbg("%s - command timed out", __func__);
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)
{
struct edgeport_serial *edge_serial =
usb_get_serial_data(edge_port->port->serial);
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;
if (edge_serial->is_epic &&
!edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
edge_port->port->number, baudRate);
return 0;
}
dbg("%s - port = %d, baud = %d", __func__,
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",
__func__);
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", __func__, 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", __func__, baudrate);
for (i = 0; i < ARRAY_SIZE(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", __func__, 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)
{
struct edgeport_serial *edge_serial =
usb_get_serial_data(edge_port->port->serial);
unsigned char *cmdBuffer;
unsigned char *currCmd;
unsigned long cmdLen = 0;
int status;
dbg("%s - write to %s register 0x%02x",
(regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
if (edge_serial->is_epic &&
!edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
regNum == MCR) {
dbg("SendCmdWriteUartReg - Not writing to MCR Register");
return 0;
}
if (edge_serial->is_epic &&
!edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
regNum == LCR) {
dbg("SendCmdWriteUartReg - Not writing to LCR Register");
return 0;
}
/* 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.
*****************************************************************************/
static void change_port_settings(struct tty_struct *tty,
struct edgeport_port *edge_port, struct ktermios *old_termios)
{
struct edgeport_serial *edge_serial =
usb_get_serial_data(edge_port->port->serial);
int baud;
unsigned cflag;
__u8 mask = 0xff;
__u8 lData;
__u8 lParity;
__u8 lStop;
__u8 rxFlow;
__u8 txFlow;
int status;
dbg("%s - port %d", __func__, edge_port->port->number);
if (!edge_port->open &&
!edge_port->openPending) {
dbg("%s - port not opened", __func__);
return;
}
cflag = tty->termios->c_cflag;
switch (cflag & CSIZE) {
case CS5:
lData = LCR_BITS_5; mask = 0x1f;
dbg("%s - data bits = 5", __func__);
break;
case CS6:
lData = LCR_BITS_6; mask = 0x3f;
dbg("%s - data bits = 6", __func__);
break;
case CS7:
lData = LCR_BITS_7; mask = 0x7f;
dbg("%s - data bits = 7", __func__);
break;
default:
case CS8:
lData = LCR_BITS_8;
dbg("%s - data bits = 8", __func__);
break;
}
lParity = LCR_PAR_NONE;
if (cflag & PARENB) {
if (cflag & CMSPAR) {
if (cflag & PARODD) {
lParity = LCR_PAR_MARK;
dbg("%s - parity = mark", __func__);
} else {
lParity = LCR_PAR_SPACE;
dbg("%s - parity = space", __func__);
}
} else if (cflag & PARODD) {
lParity = LCR_PAR_ODD;
dbg("%s - parity = odd", __func__);
} else {
lParity = LCR_PAR_EVEN;
dbg("%s - parity = even", __func__);
}
} else {
dbg("%s - parity = none", __func__);
}
if (cflag & CSTOPB) {
lStop = LCR_STOP_2;
dbg("%s - stop bits = 2", __func__);
} else {
lStop = LCR_STOP_1;
dbg("%s - stop bits = 1", __func__);
}
/* 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", __func__);
} else {
dbg("%s - RTS/CTS is disabled", __func__);
}
/* 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);
if ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
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",
__func__, start_char, stop_char);
} else {
dbg("%s - INBOUND XON/XOFF is disabled", __func__);
}
/* 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",
__func__, start_char, stop_char);
} else {
dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
}
}
/* Set flow control to the configured value */
if ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
if ((!edge_serial->is_epic) ||
((edge_serial->is_epic) &&
(edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
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", __func__, baud);
status = send_cmd_write_baud_rate(edge_port, baud);
if (status == -1) {
/* Speed change was not possible - put back the old speed */
baud = tty_termios_baud_rate(old_termios);
tty_encode_baud_rate(tty, baud, 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, int buflen,
__le16 *unicode, int unicode_size)
{
int i;
if (buflen <= 0) /* never happens, but... */
return;
--buflen; /* space for nul */
for (i = 0; i < unicode_size; i++) {
if (i >= buflen)
break;
string[i] = (char)(le16_to_cpu(unicode[i]));
}
string[i] = 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, sizeof(string),
edge_serial->manuf_descriptor.SerialNumber,
edge_serial->manuf_descriptor.SerNumLength/2);
dbg(" SerialNumber: %s", string);
unicode_to_ascii(string, sizeof(string),
edge_serial->manuf_descriptor.AssemblyNumber,
edge_serial->manuf_descriptor.AssemblyNumLength/2);
dbg(" AssemblyNumber: %s", string);
unicode_to_ascii(string, sizeof(string),
edge_serial->manuf_descriptor.OemAssyNumber,
edge_serial->manuf_descriptor.OemAssyNumLength/2);
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)
{
const struct ihex_binrec *rec;
const struct firmware *fw;
const char *fw_name;
const char *fw_info;
int response;
__u32 Operaddr;
__u16 build;
switch (edge_serial->product_info.iDownloadFile) {
case EDGE_DOWNLOAD_FILE_I930:
fw_info = "downloading firmware version (930)";
fw_name = "edgeport/down.fw";
break;
case EDGE_DOWNLOAD_FILE_80251:
fw_info = "downloading firmware version (80251)";
fw_name = "edgeport/down2.fw";
break;
case EDGE_DOWNLOAD_FILE_NONE:
dbg ("No download file specified, skipping download\n");
return;
default:
return;
}
response = request_ihex_firmware(&fw, fw_name,
&edge_serial->serial->dev->dev);
if (response) {
printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
fw_name, response);
return;
}
rec = (const struct ihex_binrec *)fw->data;
build = (rec->data[2] << 8) | rec->data[3];
dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
edge_serial->product_info.FirmwareMajorVersion = fw->data[0];
edge_serial->product_info.FirmwareMinorVersion = fw->data[1];
edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
for (rec = ihex_next_binrec(rec); rec;
rec = ihex_next_binrec(rec)) {
Operaddr = be32_to_cpu(rec->addr);
response = sram_write(edge_serial->serial,
Operaddr >> 16,
Operaddr & 0xFFFF,
be16_to_cpu(rec->len),
&rec->data[0]);
if (response < 0) {
dev_err(&edge_serial->serial->dev->dev,
"sram_write failed (%x, %x, %d)\n",
Operaddr >> 16, Operaddr & 0xFFFF,
be16_to_cpu(rec->len));
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);
release_firmware(fw);
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, j;
int response;
bool interrupt_in_found;
bool bulk_in_found;
bool bulk_out_found;
static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0,
EDGE_COMPATIBILITY_MASK1,
EDGE_COMPATIBILITY_MASK2 };
dev = serial->dev;
/* create our private serial structure */
edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
if (edge_serial == NULL) {
dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
return -ENOMEM;
}
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 */
i = get_string(dev, dev->descriptor.iManufacturer,
&edge_serial->name[0], MAX_NAME_LEN+1);
edge_serial->name[i++] = ' ';
get_string(dev, dev->descriptor.iProduct,
&edge_serial->name[i], MAX_NAME_LEN+2 - i);
dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
/* Read the epic descriptor */
if (get_epic_descriptor(edge_serial) <= 0) {
/* memcpy descriptor to Supports structures */
memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
sizeof(struct edge_compatibility_bits));
/* 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->is_epic) &&
(edge_serial->product_info.NumPorts != serial->num_ports)) {
dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
"vs. core thinking we have %d ports, email "
"greg@kroah.com this information.\n",
edge_serial->product_info.NumPorts,
serial->num_ports);
}
dbg("%s - time 1 %ld", __func__, jiffies);
/* If not an EPiC device */
if (!edge_serial->is_epic) {
/* now load the application firmware into this device */
load_application_firmware(edge_serial);
dbg("%s - time 2 %ld", __func__, jiffies);
/* Check current Edgeport EEPROM and update if necessary */
update_edgeport_E2PROM(edge_serial);
dbg("%s - time 3 %ld", __func__, jiffies);
/* set the configuration to use #1 */
/* dbg("set_configuration 1"); */
/* usb_set_configuration (dev, 1); */
}
dbg(" FirmwareMajorVersion %d.%d.%d",
edge_serial->product_info.FirmwareMajorVersion,
edge_serial->product_info.FirmwareMinorVersion,
le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
/* 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",
__func__);
for (j = 0; j < i; ++j) {
kfree(usb_get_serial_port_data(serial->port[j]));
usb_set_serial_port_data(serial->port[j],
NULL);
}
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);
}
response = 0;
if (edge_serial->is_epic) {
/* EPIC thing, set up our interrupt polling now and our read
* urb, so that the device knows it really is connected. */
interrupt_in_found = bulk_in_found = bulk_out_found = false;
for (i = 0; i < serial->interface->altsetting[0]
.desc.bNumEndpoints; ++i) {
struct usb_endpoint_descriptor *endpoint;
int buffer_size;
endpoint = &serial->interface->altsetting[0].
endpoint[i].desc;
buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
if (!interrupt_in_found &&
(usb_endpoint_is_int_in(endpoint))) {
/* we found a interrupt in endpoint */
dbg("found interrupt in");
/* not set up yet, so do it now */
edge_serial->interrupt_read_urb =
usb_alloc_urb(0, GFP_KERNEL);
if (!edge_serial->interrupt_read_urb) {
dev_err(&dev->dev, "out of memory\n");
return -ENOMEM;
}
edge_serial->interrupt_in_buffer =
kmalloc(buffer_size, GFP_KERNEL);
if (!edge_serial->interrupt_in_buffer) {
dev_err(&dev->dev, "out of memory\n");
usb_free_urb(edge_serial->interrupt_read_urb);
return -ENOMEM;
}
edge_serial->interrupt_in_endpoint =
endpoint->bEndpointAddress;
/* set up our interrupt urb */
usb_fill_int_urb(
edge_serial->interrupt_read_urb,
dev,
usb_rcvintpipe(dev,
endpoint->bEndpointAddress),
edge_serial->interrupt_in_buffer,
buffer_size,
edge_interrupt_callback,
edge_serial,
endpoint->bInterval);
interrupt_in_found = true;
}
if (!bulk_in_found &&
(usb_endpoint_is_bulk_in(endpoint))) {
/* we found a bulk in endpoint */
dbg("found bulk in");
/* not set up yet, so do it now */
edge_serial->read_urb =
usb_alloc_urb(0, GFP_KERNEL);
if (!edge_serial->read_urb) {
dev_err(&dev->dev, "out of memory\n");
return -ENOMEM;
}
edge_serial->bulk_in_buffer =
kmalloc(buffer_size, GFP_KERNEL);
if (!edge_serial->bulk_in_buffer) {
dev_err(&dev->dev, "out of memory\n");
usb_free_urb(edge_serial->read_urb);
return -ENOMEM;
}
edge_serial->bulk_in_endpoint =
endpoint->bEndpointAddress;
/* set up our bulk in urb */
usb_fill_bulk_urb(edge_serial->read_urb, dev,
usb_rcvbulkpipe(dev,
endpoint->bEndpointAddress),
edge_serial->bulk_in_buffer,
le16_to_cpu(endpoint->wMaxPacketSize),
edge_bulk_in_callback,
edge_serial);
bulk_in_found = true;
}
if (!bulk_out_found &&
(usb_endpoint_is_bulk_out(endpoint))) {
/* we found a bulk out endpoint */
dbg("found bulk out");
edge_serial->bulk_out_endpoint =
endpoint->bEndpointAddress;
bulk_out_found = true;
}
}
if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
dev_err(&dev->dev, "Error - the proper endpoints "
"were not found!\n");
return -ENODEV;
}
/* 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(&dev->dev,
"%s - Error %d submitting control urb\n",
__func__, response);
}
return response;
}
/****************************************************************************
* edge_shutdown
* This function is called whenever the device is removed from the usb bus.
****************************************************************************/
static void edge_shutdown(struct usb_serial *serial)
{
struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
int i;
dbg("%s", __func__);
/* 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);
}
/* free up our endpoint stuff */
if (edge_serial->is_epic) {
usb_kill_urb(edge_serial->interrupt_read_urb);
usb_free_urb(edge_serial->interrupt_read_urb);
kfree(edge_serial->interrupt_in_buffer);
usb_kill_urb(edge_serial->read_urb);
usb_free_urb(edge_serial->read_urb);
kfree(edge_serial->bulk_in_buffer);
}
kfree(edge_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_serial_register(&epic_device);
if (retval)
goto failed_epic_device_register;
retval = usb_register(&io_driver);
if (retval)
goto failed_usb_register;
atomic_set(&CmdUrbs, 0);
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
DRIVER_DESC "\n");
return 0;
failed_usb_register:
usb_serial_deregister(&epic_device);
failed_epic_device_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);
usb_serial_deregister(&epic_device);
}
module_init(edgeport_init);
module_exit(edgeport_exit);
/* Module information */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("edgeport/boot.fw");
MODULE_FIRMWARE("edgeport/boot2.fw");
MODULE_FIRMWARE("edgeport/down.fw");
MODULE_FIRMWARE("edgeport/down2.fw");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
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