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mos7840: remove loads of bogus assignments to status 

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-07-22 11:16:12 +01:00 committed by Linus Torvalds
parent 4944d40054
commit 880af9db2c
1 changed files with 164 additions and 236 deletions
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400
drivers/usb/serial/mos7840.c
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@ -33,7 +33,7 @@
#include <linux/serial.h> #include <linux/serial.h>
#include <linux/usb.h> #include <linux/usb.h>
#include <linux/usb/serial.h> #include <linux/usb/serial.h>
#include <asm/uaccess.h> #include <linux/uaccess.h>
/* /*
* Version Information * Version Information
@ -82,8 +82,8 @@
* Defines used for sending commands to port * Defines used for sending commands to port
*/ */
#define WAIT_FOR_EVER (HZ * 0 ) /* timeout urb is wait for ever */ #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
#define MOS_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */ #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
#define MOS_PORT1 0x0200 #define MOS_PORT1 0x0200
#define MOS_PORT2 0x0300 #define MOS_PORT2 0x0300
@ -102,8 +102,8 @@
#define MAX_NAME_LEN 64 #define MAX_NAME_LEN 64
#define ZLP_REG1 0x3A //Zero_Flag_Reg1 58 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
#define ZLP_REG5 0x3E //Zero_Flag_Reg5 62 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
/* For higher baud Rates use TIOCEXBAUD */ /* For higher baud Rates use TIOCEXBAUD */
#define TIOCEXBAUD 0x5462 #define TIOCEXBAUD 0x5462
@ -142,7 +142,7 @@
#define MOS_MSR_DELTA_RI 0x40 #define MOS_MSR_DELTA_RI 0x40
#define MOS_MSR_DELTA_CD 0x80 #define MOS_MSR_DELTA_CD 0x80
// Serial Port register Address /* Serial Port register Address */
#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
#define FIFO_CONTROL_REGISTER ((__u16)(0x02)) #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
#define LINE_CONTROL_REGISTER ((__u16)(0x03)) #define LINE_CONTROL_REGISTER ((__u16)(0x03))
@ -201,11 +201,11 @@ struct moschip_port {
struct async_icount icount; struct async_icount icount;
struct usb_serial_port *port; /* loop back to the owner of this object */ struct usb_serial_port *port; /* loop back to the owner of this object */
/*Offsets */ /* Offsets */
__u8 SpRegOffset; __u8 SpRegOffset;
__u8 ControlRegOffset; __u8 ControlRegOffset;
__u8 DcrRegOffset; __u8 DcrRegOffset;
//for processing control URBS in interrupt context /* for processing control URBS in interrupt context */
struct urb *control_urb; struct urb *control_urb;
struct usb_ctrlrequest *dr; struct usb_ctrlrequest *dr;
char *ctrl_buf; char *ctrl_buf;
@ -244,7 +244,7 @@ static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
*/ */
static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
__u16 * val) __u16 *val)
{ {
struct usb_device *dev = port->serial->dev; struct usb_device *dev = port->serial->dev;
int ret = 0; int ret = 0;
@ -269,16 +269,15 @@ static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
struct usb_device *dev = port->serial->dev; struct usb_device *dev = port->serial->dev;
val = val & 0x00ff; val = val & 0x00ff;
// For the UART control registers, the application number need to be Or'ed /* For the UART control registers, the application number need
to be Or'ed */
if (port->serial->num_ports == 4) { if (port->serial->num_ports == 4) {
val |= val |= (((__u16) port->number -
(((__u16) port->number - (__u16) (port->serial->minor)) + (__u16) (port->serial->minor)) + 1) << 8;
1) << 8;
dbg("mos7840_set_uart_reg application number is %x\n", val); dbg("mos7840_set_uart_reg application number is %x\n", val);
} else { } else {
if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
val |= val |= (((__u16) port->number -
(((__u16) port->number -
(__u16) (port->serial->minor)) + 1) << 8; (__u16) (port->serial->minor)) + 1) << 8;
dbg("mos7840_set_uart_reg application number is %x\n", dbg("mos7840_set_uart_reg application number is %x\n",
val); val);
@ -302,14 +301,15 @@ static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
* by passing usb_rcvctrlpipe function as parameter. * by passing usb_rcvctrlpipe function as parameter.
*/ */
static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
__u16 * val) __u16 *val)
{ {
struct usb_device *dev = port->serial->dev; struct usb_device *dev = port->serial->dev;
int ret = 0; int ret = 0;
__u16 Wval; __u16 Wval;
//dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); /* dbg("application number is %4x \n",
/*Wval is same as application number */ (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
/* Wval is same as application number */
if (port->serial->num_ports == 4) { if (port->serial->num_ports == 4) {
Wval = Wval =
(((__u16) port->number - (__u16) (port->serial->minor)) + (((__u16) port->number - (__u16) (port->serial->minor)) +
@ -317,14 +317,12 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
dbg("mos7840_get_uart_reg application number is %x\n", Wval); dbg("mos7840_get_uart_reg application number is %x\n", Wval);
} else { } else {
if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
Wval = Wval = (((__u16) port->number -
(((__u16) port->number -
(__u16) (port->serial->minor)) + 1) << 8; (__u16) (port->serial->minor)) + 1) << 8;
dbg("mos7840_get_uart_reg application number is %x\n", dbg("mos7840_get_uart_reg application number is %x\n",
Wval); Wval);
} else { } else {
Wval = Wval = (((__u16) port->number -
(((__u16) port->number -
(__u16) (port->serial->minor)) + 2) << 8; (__u16) (port->serial->minor)) + 2) << 8;
dbg("mos7840_get_uart_reg application number is %x\n", dbg("mos7840_get_uart_reg application number is %x\n",
Wval); Wval);
@ -406,11 +404,11 @@ static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
dbg("%s - %02x", __func__, new_lsr); dbg("%s - %02x", __func__, new_lsr);
if (new_lsr & SERIAL_LSR_BI) { if (new_lsr & SERIAL_LSR_BI) {
// /*
// Parity and Framing errors only count if they * Parity and Framing errors only count if they
// occur exclusive of a break being * occur exclusive of a break being
// received. * received.
// */
new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
} }
@ -492,7 +490,7 @@ exit:
} }
static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
__u16 * val) __u16 *val)
{ {
struct usb_device *dev = mcs->port->serial->dev; struct usb_device *dev = mcs->port->serial->dev;
struct usb_ctrlrequest *dr = mcs->dr; struct usb_ctrlrequest *dr = mcs->dr;
@ -501,7 +499,7 @@ static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
dr->bRequestType = MCS_RD_RTYPE; dr->bRequestType = MCS_RD_RTYPE;
dr->bRequest = MCS_RDREQ; dr->bRequest = MCS_RDREQ;
dr->wValue = cpu_to_le16(Wval); //0; dr->wValue = cpu_to_le16(Wval); /* 0 */
dr->wIndex = cpu_to_le16(reg); dr->wIndex = cpu_to_le16(reg);
dr->wLength = cpu_to_le16(2); dr->wLength = cpu_to_le16(2);
@ -607,7 +605,8 @@ static void mos7840_interrupt_callback(struct urb *urb)
} }
} }
} }
if (!(rv < 0)) /* the completion handler for the control urb will resubmit */ if (!(rv < 0))
/* the completion handler for the control urb will resubmit */
return; return;
exit: exit:
result = usb_submit_urb(urb, GFP_ATOMIC); result = usb_submit_urb(urb, GFP_ATOMIC);
@ -656,8 +655,8 @@ static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
if (!port || if (!port ||
mos7840_port_paranoia_check(port, function) || mos7840_port_paranoia_check(port, function) ||
mos7840_serial_paranoia_check(port->serial, function)) { mos7840_serial_paranoia_check(port->serial, function)) {
/* then say that we don't have a valid usb_serial thing, which will /* then say that we don't have a valid usb_serial thing,
* end up genrating -ENODEV return values */ * which will end up genrating -ENODEV return values */
return NULL; return NULL;
} }
@ -741,8 +740,8 @@ static void mos7840_bulk_in_callback(struct urb *urb)
/***************************************************************************** /*****************************************************************************
* mos7840_bulk_out_data_callback * mos7840_bulk_out_data_callback
* this is the callback function for when we have finished sending serial data * this is the callback function for when we have finished sending
* on the bulk out endpoint. * serial data on the bulk out endpoint.
*****************************************************************************/ *****************************************************************************/
static void mos7840_bulk_out_data_callback(struct urb *urb) static void mos7840_bulk_out_data_callback(struct urb *urb)
@ -848,7 +847,8 @@ static int mos7840_open(struct tty_struct *tty,
continue; continue;
} }
urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
GFP_KERNEL);
if (!urb->transfer_buffer) { if (!urb->transfer_buffer) {
usb_free_urb(urb); usb_free_urb(urb);
mos7840_port->write_urb_pool[j] = NULL; mos7840_port->write_urb_pool[j] = NULL;
@ -869,9 +869,8 @@ static int mos7840_open(struct tty_struct *tty,
* 0x08 : SP1/2 Control Reg * 0x08 : SP1/2 Control Reg
*****************************************************************************/ *****************************************************************************/
//NEED to check the following Block /* NEED to check the following Block */
status = 0;
Data = 0x0; Data = 0x0;
status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
if (status < 0) { if (status < 0) {
@ -891,36 +890,35 @@ static int mos7840_open(struct tty_struct *tty,
dbg("writing Spreg failed\n"); dbg("writing Spreg failed\n");
return -1; return -1;
} }
//End of block to be checked /* End of block to be checked */
status = 0;
Data = 0x0; Data = 0x0;
status = status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); &Data);
if (status < 0) { if (status < 0) {
dbg("Reading Controlreg failed\n"); dbg("Reading Controlreg failed\n");
return -1; return -1;
} }
Data |= 0x08; //Driver done bit Data |= 0x08; /* Driver done bit */
Data |= 0x20; //rx_disable Data |= 0x20; /* rx_disable */
status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); status = mos7840_set_reg_sync(port,
mos7840_port->ControlRegOffset, Data);
if (status < 0) { if (status < 0) {
dbg("writing Controlreg failed\n"); dbg("writing Controlreg failed\n");
return -1; return -1;
} }
//do register settings here /* do register settings here */
// Set all regs to the device default values. /* Set all regs to the device default values. */
//////////////////////////////////// /***********************************
// First Disable all interrupts. * First Disable all interrupts.
//////////////////////////////////// ***********************************/
Data = 0x00; Data = 0x00;
status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
if (status < 0) { if (status < 0) {
dbg("disableing interrupts failed\n"); dbg("disableing interrupts failed\n");
return -1; return -1;
} }
// Set FIFO_CONTROL_REGISTER to the default value /* Set FIFO_CONTROL_REGISTER to the default value */
Data = 0x00; Data = 0x00;
status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
if (status < 0) { if (status < 0) {
@ -947,90 +945,73 @@ static int mos7840_open(struct tty_struct *tty,
status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
mos7840_port->shadowLCR = Data; mos7840_port->shadowLCR = Data;
Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
Data = 0x0c; Data = 0x0c;
status = 0;
status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
Data = 0x0; Data = 0x0;
status = 0;
status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
Data = 0x00; Data = 0x00;
status = 0;
status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
Data = Data & ~SERIAL_LCR_DLAB; Data = Data & ~SERIAL_LCR_DLAB;
status = 0;
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
mos7840_port->shadowLCR = Data; mos7840_port->shadowLCR = Data;
//clearing Bulkin and Bulkout Fifo /* clearing Bulkin and Bulkout Fifo */
Data = 0x0; Data = 0x0;
status = 0;
status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
Data = Data | 0x0c; Data = Data | 0x0c;
status = 0;
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
Data = Data & ~0x0c; Data = Data & ~0x0c;
status = 0;
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
//Finally enable all interrupts /* Finally enable all interrupts */
Data = 0x0;
Data = 0x0c; Data = 0x0c;
status = 0;
status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
//clearing rx_disable /* clearing rx_disable */
Data = 0x0; Data = 0x0;
status = 0; status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
status = &Data);
mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
Data = Data & ~0x20; Data = Data & ~0x20;
status = 0; status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
status = Data);
mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
// rx_negate /* rx_negate */
Data = 0x0; Data = 0x0;
status = 0; status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
status = &Data);
mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
Data = Data | 0x10; Data = Data | 0x10;
status = 0; status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
status = Data);
mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
/* force low_latency on so that our tty_push actually forces * /* force low_latency on so that our tty_push actually forces *
* the data through,otherwise it is scheduled, and with * * the data through,otherwise it is scheduled, and with *
* high data rates (like with OHCI) data can get lost. */ * high data rates (like with OHCI) data can get lost. */
if (tty) if (tty)
tty->low_latency = 1; tty->low_latency = 1;
/* Check to see if we've set up our endpoint info yet *
* (can't set it up in mos7840_startup as the structures * /* Check to see if we've set up our endpoint info yet *
* were not set up at that time.) */ * (can't set it up in mos7840_startup as the structures *
* were not set up at that time.) */
if (port0->open_ports == 1) { if (port0->open_ports == 1) {
if (serial->port[0]->interrupt_in_buffer == NULL) { if (serial->port[0]->interrupt_in_buffer == NULL) {
/* set up interrupt urb */ /* set up interrupt urb */
usb_fill_int_urb(serial->port[0]->interrupt_in_urb, usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
serial->dev, serial->dev,
usb_rcvintpipe(serial->dev, usb_rcvintpipe(serial->dev,
serial->port[0]-> serial->port[0]->interrupt_in_endpointAddress),
interrupt_in_endpointAddress), serial->port[0]->interrupt_in_buffer,
serial->port[0]->interrupt_in_buffer, serial->port[0]->interrupt_in_urb->
serial->port[0]->interrupt_in_urb-> transfer_buffer_length,
transfer_buffer_length, mos7840_interrupt_callback,
mos7840_interrupt_callback, serial,
serial, serial->port[0]->interrupt_in_urb->interval);
serial->port[0]->interrupt_in_urb->
interval);
/* start interrupt read for mos7840 * /* start interrupt read for mos7840 *
* will continue as long as mos7840 is connected */ * will continue as long as mos7840 is connected */
@ -1085,14 +1066,16 @@ static int mos7840_open(struct tty_struct *tty,
memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
/* initialize our port settings */ /* initialize our port settings */
mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */ /* Must set to enable ints! */
mos7840_port->shadowMCR = MCR_MASTER_IE;
/* send a open port command */ /* send a open port command */
mos7840_port->open = 1; mos7840_port->open = 1;
//mos7840_change_port_settings(mos7840_port,old_termios); /* mos7840_change_port_settings(mos7840_port,old_termios); */
mos7840_port->icount.tx = 0; mos7840_port->icount.tx = 0;
mos7840_port->icount.rx = 0; mos7840_port->icount.rx = 0;
dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial, mos7840_port, port); dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
serial, mos7840_port, port);
return 0; return 0;
@ -1129,11 +1112,11 @@ static int mos7840_chars_in_buffer(struct tty_struct *tty)
return 0; return 0;
} }
spin_lock_irqsave(&mos7840_port->pool_lock,flags); spin_lock_irqsave(&mos7840_port->pool_lock, flags);
for (i = 0; i < NUM_URBS; ++i) for (i = 0; i < NUM_URBS; ++i)
if (mos7840_port->busy[i]) if (mos7840_port->busy[i])
chars += URB_TRANSFER_BUFFER_SIZE; chars += URB_TRANSFER_BUFFER_SIZE;
spin_unlock_irqrestore(&mos7840_port->pool_lock,flags); spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
dbg("%s - returns %d", __func__, chars); dbg("%s - returns %d", __func__, chars);
return chars; return chars;
@ -1161,9 +1144,8 @@ static void mos7840_block_until_tx_empty(struct tty_struct *tty,
count = mos7840_chars_in_buffer(tty); count = mos7840_chars_in_buffer(tty);
/* Check for Buffer status */ /* Check for Buffer status */
if (count <= 0) { if (count <= 0)
return; return;
}
/* Block the thread for a while */ /* Block the thread for a while */
interruptible_sleep_on_timeout(&mos7840_port->wait_chase, interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
@ -1245,11 +1227,11 @@ static void mos7840_close(struct tty_struct *tty,
} }
if ((&mos7840_port->control_urb)) { if ((&mos7840_port->control_urb)) {
dbg("%s", "Shutdown control read\n"); dbg("%s", "Shutdown control read\n");
// usb_kill_urb (mos7840_port->control_urb); /*/ usb_kill_urb (mos7840_port->control_urb); */
} }
} }
// if(mos7840_port->ctrl_buf != NULL) /* if(mos7840_port->ctrl_buf != NULL) */
// kfree(mos7840_port->ctrl_buf); /* kfree(mos7840_port->ctrl_buf); */
port0->open_ports--; port0->open_ports--;
dbg("mos7840_num_open_ports in close%d:in port%d\n", dbg("mos7840_num_open_ports in close%d:in port%d\n",
port0->open_ports, port->number); port0->open_ports, port->number);
@ -1262,10 +1244,8 @@ static void mos7840_close(struct tty_struct *tty,
if (mos7840_port->write_urb) { if (mos7840_port->write_urb) {
/* if this urb had a transfer buffer already (old tx) free it */ /* if this urb had a transfer buffer already (old tx) free it */
if (mos7840_port->write_urb->transfer_buffer != NULL)
if (mos7840_port->write_urb->transfer_buffer != NULL) {
kfree(mos7840_port->write_urb->transfer_buffer); kfree(mos7840_port->write_urb->transfer_buffer);
}
usb_free_urb(mos7840_port->write_urb); usb_free_urb(mos7840_port->write_urb);
} }
@ -1302,9 +1282,8 @@ static void mos7840_block_until_chase_response(struct tty_struct *tty,
count = mos7840_chars_in_buffer(tty); count = mos7840_chars_in_buffer(tty);
/* Check for Buffer status */ /* Check for Buffer status */
if (count <= 0) { if (count <= 0)
return; return;
}
/* Block the thread for a while */ /* Block the thread for a while */
interruptible_sleep_on_timeout(&mos7840_port->wait_chase, interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
@ -1349,9 +1328,8 @@ static void mos7840_break(struct tty_struct *tty, int break_state)
mos7840_port = mos7840_get_port_private(port); mos7840_port = mos7840_get_port_private(port);
if (mos7840_port == NULL) { if (mos7840_port == NULL)
return; return;
}
if (serial->dev) if (serial->dev)
/* flush and block until tx is empty */ /* flush and block until tx is empty */
@ -1403,9 +1381,8 @@ static int mos7840_write_room(struct tty_struct *tty)
spin_lock_irqsave(&mos7840_port->pool_lock, flags); spin_lock_irqsave(&mos7840_port->pool_lock, flags);
for (i = 0; i < NUM_URBS; ++i) { for (i = 0; i < NUM_URBS; ++i) {
if (!mos7840_port->busy[i]) { if (!mos7840_port->busy[i])
room += URB_TRANSFER_BUFFER_SIZE; room += URB_TRANSFER_BUFFER_SIZE;
}
} }
spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
@ -1435,45 +1412,41 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
struct moschip_port *mos7840_port; struct moschip_port *mos7840_port;
struct usb_serial *serial; struct usb_serial *serial;
struct urb *urb; struct urb *urb;
//__u16 Data; /* __u16 Data; */
const unsigned char *current_position = data; const unsigned char *current_position = data;
unsigned char *data1; unsigned char *data1;
dbg("%s \n", "entering ..........."); dbg("%s \n", "entering ...........");
//dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR); /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
mos7840_port->shadowLCR); */
#ifdef NOTMOS7840 #ifdef NOTMOS7840
Data = 0x00; Data = 0x00;
status = 0;
status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
mos7840_port->shadowLCR = Data; mos7840_port->shadowLCR = Data;
dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
mos7840_port->shadowLCR); mos7840_port->shadowLCR);
//Data = 0x03; /* Data = 0x03; */
//status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
//mos7840_port->shadowLCR=Data;//Need to add later /* mos7840_port->shadowLCR=Data;//Need to add later */
Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
status = 0;
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
//Data = 0x0c; /* Data = 0x0c; */
//status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
Data = 0x00; Data = 0x00;
status = 0;
status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
dbg("mos7840_write:DLL value is %x\n", Data); dbg("mos7840_write:DLL value is %x\n", Data);
Data = 0x0; Data = 0x0;
status = 0;
status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
dbg("mos7840_write:DLM value is %x\n", Data); dbg("mos7840_write:DLM value is %x\n", Data);
Data = Data & ~SERIAL_LCR_DLAB; Data = Data & ~SERIAL_LCR_DLAB;
dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
mos7840_port->shadowLCR); mos7840_port->shadowLCR);
status = 0;
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
#endif #endif
@ -1598,7 +1571,6 @@ static void mos7840_throttle(struct tty_struct *tty)
/* if we are implementing RTS/CTS, toggle that line */ /* if we are implementing RTS/CTS, toggle that line */
if (tty->termios->c_cflag & CRTSCTS) { if (tty->termios->c_cflag & CRTSCTS) {
mos7840_port->shadowMCR &= ~MCR_RTS; mos7840_port->shadowMCR &= ~MCR_RTS;
status = 0;
status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
mos7840_port->shadowMCR); mos7840_port->shadowMCR);
if (status < 0) if (status < 0)
@ -1610,8 +1582,9 @@ static void mos7840_throttle(struct tty_struct *tty)
/***************************************************************************** /*****************************************************************************
* mos7840_unthrottle * mos7840_unthrottle
* this function is called by the tty driver when it wants to resume the data * this function is called by the tty driver when it wants to resume
* being read from the port (called after SerialThrottle is called) * the data being read from the port (called after mos7840_throttle is
* called)
*****************************************************************************/ *****************************************************************************/
static void mos7840_unthrottle(struct tty_struct *tty) static void mos7840_unthrottle(struct tty_struct *tty)
{ {
@ -1645,7 +1618,6 @@ static void mos7840_unthrottle(struct tty_struct *tty)
/* if we are implementing RTS/CTS, toggle that line */ /* if we are implementing RTS/CTS, toggle that line */
if (tty->termios->c_cflag & CRTSCTS) { if (tty->termios->c_cflag & CRTSCTS) {
mos7840_port->shadowMCR |= MCR_RTS; mos7840_port->shadowMCR |= MCR_RTS;
status = 0;
status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
mos7840_port->shadowMCR); mos7840_port->shadowMCR);
if (status < 0) if (status < 0)
@ -1660,7 +1632,7 @@ static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
unsigned int result; unsigned int result;
__u16 msr; __u16 msr;
__u16 mcr; __u16 mcr;
int status = 0; int status;
mos7840_port = mos7840_get_port_private(port); mos7840_port = mos7840_get_port_private(port);
dbg("%s - port %d", __func__, port->number); dbg("%s - port %d", __func__, port->number);
@ -1731,7 +1703,7 @@ static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
* baud rate. * baud rate.
*****************************************************************************/ *****************************************************************************/
static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
__u16 * clk_sel_val) __u16 *clk_sel_val)
{ {
dbg("%s - %d", __func__, baudRate); dbg("%s - %d", __func__, baudRate);
@ -1783,9 +1755,8 @@ static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
/* Check for round off */ /* Check for round off */
round1 = (__u16) (2304000L / baudrate); round1 = (__u16) (2304000L / baudrate);
round = (__u16) (round1 - (custom * 10)); round = (__u16) (round1 - (custom * 10));
if (round > 4) { if (round > 4)
custom++; custom++;
}
*divisor = custom; *divisor = custom;
dbg(" Baud %d = %d\n", baudrate, custom); dbg(" Baud %d = %d\n", baudrate, custom);
@ -1833,16 +1804,15 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
dbg("%s - port = %d, baud = %d", __func__, dbg("%s - port = %d, baud = %d", __func__,
mos7840_port->port->number, baudRate); mos7840_port->port->number, baudRate);
//reset clk_uart_sel in spregOffset /* reset clk_uart_sel in spregOffset */
if (baudRate > 115200) { if (baudRate > 115200) {
#ifdef HW_flow_control #ifdef HW_flow_control
//NOTE: need to see the pther register to modify /* NOTE: need to see the pther register to modify */
//setting h/w flow control bit to 1; /* setting h/w flow control bit to 1 */
status = 0;
Data = 0x2b; Data = 0x2b;
mos7840_port->shadowMCR = Data; mos7840_port->shadowMCR = Data;
status = status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); Data);
if (status < 0) { if (status < 0) {
dbg("Writing spreg failed in set_serial_baud\n"); dbg("Writing spreg failed in set_serial_baud\n");
return -1; return -1;
@ -1851,12 +1821,11 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
} else { } else {
#ifdef HW_flow_control #ifdef HW_flow_control
//setting h/w flow control bit to 0; / *setting h/w flow control bit to 0 */
status = 0;
Data = 0xb; Data = 0xb;
mos7840_port->shadowMCR = Data; mos7840_port->shadowMCR = Data;
status = status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); Data);
if (status < 0) { if (status < 0) {
dbg("Writing spreg failed in set_serial_baud\n"); dbg("Writing spreg failed in set_serial_baud\n");
return -1; return -1;
@ -1865,25 +1834,20 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
} }
if (1) //baudRate <= 115200) if (1) { /* baudRate <= 115200) */
{
clk_sel_val = 0x0; clk_sel_val = 0x0;
Data = 0x0; Data = 0x0;
status = 0; status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
status =
mos7840_calc_baud_rate_divisor(baudRate, &divisor,
&clk_sel_val); &clk_sel_val);
status = status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
&Data);
if (status < 0) { if (status < 0) {
dbg("reading spreg failed in set_serial_baud\n"); dbg("reading spreg failed in set_serial_baud\n");
return -1; return -1;
} }
Data = (Data & 0x8f) | clk_sel_val; Data = (Data & 0x8f) | clk_sel_val;
status = 0; status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
status = Data);
mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
if (status < 0) { if (status < 0) {
dbg("Writing spreg failed in set_serial_baud\n"); dbg("Writing spreg failed in set_serial_baud\n");
return -1; return -1;
@ -1915,7 +1879,6 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
} }
return status; return status;
} }
@ -2006,9 +1969,8 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
dbg("%s - parity = none", __func__); dbg("%s - parity = none", __func__);
} }
if (cflag & CMSPAR) { if (cflag & CMSPAR)
lParity = lParity | 0x20; lParity = lParity | 0x20;
}
/* Change the Stop bit */ /* Change the Stop bit */
if (cflag & CSTOPB) { if (cflag & CSTOPB) {
@ -2050,16 +2012,13 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
/* set up the MCR register and send it to the mos7840 */ /* set up the MCR register and send it to the mos7840 */
mos7840_port->shadowMCR = MCR_MASTER_IE; mos7840_port->shadowMCR = MCR_MASTER_IE;
if (cflag & CBAUD) { if (cflag & CBAUD)
mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
}
if (cflag & CRTSCTS) { if (cflag & CRTSCTS)
mos7840_port->shadowMCR |= (MCR_XON_ANY); mos7840_port->shadowMCR |= (MCR_XON_ANY);
else
} else {
mos7840_port->shadowMCR &= ~(MCR_XON_ANY); mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
}
Data = mos7840_port->shadowMCR; Data = mos7840_port->shadowMCR;
mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
@ -2255,7 +2214,6 @@ static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
mos7840_port->shadowMCR = mcr; mos7840_port->shadowMCR = mcr;
Data = mos7840_port->shadowMCR; Data = mos7840_port->shadowMCR;
status = 0;
status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
if (status < 0) { if (status < 0) {
dbg("setting MODEM_CONTROL_REGISTER Failed\n"); dbg("setting MODEM_CONTROL_REGISTER Failed\n");
@ -2276,8 +2234,7 @@ static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
unsigned int result = 0; unsigned int result = 0;
__u16 msr; __u16 msr;
unsigned int mcr = mos7840_port->shadowMCR; unsigned int mcr = mos7840_port->shadowMCR;
int status = 0; mos7840_get_uart_reg(mos7840_port->port,
status = mos7840_get_uart_reg(mos7840_port->port,
MODEM_STATUS_REGISTER, &msr); MODEM_STATUS_REGISTER, &msr);
result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
|((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
@ -2389,7 +2346,7 @@ static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
dbg("%s (%d) TIOCMIWAIT", __func__, port->number); dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
cprev = mos7840_port->icount; cprev = mos7840_port->icount;
while (1) { while (1) {
//interruptible_sleep_on(&mos7840_port->delta_msr_wait); /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
mos7840_port->delta_msr_cond = 0; mos7840_port->delta_msr_cond = 0;
wait_event_interruptible(mos7840_port->delta_msr_wait, wait_event_interruptible(mos7840_port->delta_msr_wait,
(mos7840_port-> (mos7840_port->
@ -2494,8 +2451,9 @@ static int mos7840_startup(struct usb_serial *serial)
goto error; goto error;
} }
/* Initialize all port interrupt end point to port 0 int endpoint * /* Initialize all port interrupt end point to port 0 int
* Our device has only one interrupt end point comman to all port */ * endpoint. Our device has only one interrupt end point
* common to all port */
mos7840_port->port = serial->port[i]; mos7840_port->port = serial->port[i];
mos7840_set_port_private(serial->port[i], mos7840_port); mos7840_set_port_private(serial->port[i], mos7840_port);
@ -2531,27 +2489,23 @@ static int mos7840_startup(struct usb_serial *serial)
mos7840_port->DcrRegOffset = 0x1c; mos7840_port->DcrRegOffset = 0x1c;
} }
mos7840_dump_serial_port(mos7840_port); mos7840_dump_serial_port(mos7840_port);
mos7840_set_port_private(serial->port[i], mos7840_port); mos7840_set_port_private(serial->port[i], mos7840_port);
//enable rx_disable bit in control register /* enable rx_disable bit in control register */
status = mos7840_get_reg_sync(serial->port[i],
status = mos7840_port->ControlRegOffset, &Data);
mos7840_get_reg_sync(serial->port[i],
mos7840_port->ControlRegOffset, &Data);
if (status < 0) { if (status < 0) {
dbg("Reading ControlReg failed status-0x%x\n", status); dbg("Reading ControlReg failed status-0x%x\n", status);
break; break;
} else } else
dbg("ControlReg Reading success val is %x, status%d\n", dbg("ControlReg Reading success val is %x, status%d\n",
Data, status); Data, status);
Data |= 0x08; //setting driver done bit Data |= 0x08; /* setting driver done bit */
Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg Data |= 0x04; /* sp1_bit to have cts change reflect in
modem status reg */
//Data |= 0x20; //rx_disable bit /* Data |= 0x20; //rx_disable bit */
status = 0; status = mos7840_set_reg_sync(serial->port[i],
status =
mos7840_set_reg_sync(serial->port[i],
mos7840_port->ControlRegOffset, Data); mos7840_port->ControlRegOffset, Data);
if (status < 0) { if (status < 0) {
dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
@ -2560,13 +2514,11 @@ static int mos7840_startup(struct usb_serial *serial)
dbg("ControlReg Writing success(rx_disable) status%d\n", dbg("ControlReg Writing success(rx_disable) status%d\n",
status); status);
//Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
and 0x24 in DCR3 */
Data = 0x01; Data = 0x01;
status = 0; status = mos7840_set_reg_sync(serial->port[i],
status = (__u16) (mos7840_port->DcrRegOffset + 0), Data);
mos7840_set_reg_sync(serial->port[i],
(__u16) (mos7840_port->DcrRegOffset +
0), Data);
if (status < 0) { if (status < 0) {
dbg("Writing DCR0 failed status-0x%x\n", status); dbg("Writing DCR0 failed status-0x%x\n", status);
break; break;
@ -2574,11 +2526,8 @@ static int mos7840_startup(struct usb_serial *serial)
dbg("DCR0 Writing success status%d\n", status); dbg("DCR0 Writing success status%d\n", status);
Data = 0x05; Data = 0x05;
status = 0; status = mos7840_set_reg_sync(serial->port[i],
status = (__u16) (mos7840_port->DcrRegOffset + 1), Data);
mos7840_set_reg_sync(serial->port[i],
(__u16) (mos7840_port->DcrRegOffset +
1), Data);
if (status < 0) { if (status < 0) {
dbg("Writing DCR1 failed status-0x%x\n", status); dbg("Writing DCR1 failed status-0x%x\n", status);
break; break;
@ -2586,22 +2535,17 @@ static int mos7840_startup(struct usb_serial *serial)
dbg("DCR1 Writing success status%d\n", status); dbg("DCR1 Writing success status%d\n", status);
Data = 0x24; Data = 0x24;
status = 0; status = mos7840_set_reg_sync(serial->port[i],
status = (__u16) (mos7840_port->DcrRegOffset + 2), Data);
mos7840_set_reg_sync(serial->port[i],
(__u16) (mos7840_port->DcrRegOffset +
2), Data);
if (status < 0) { if (status < 0) {
dbg("Writing DCR2 failed status-0x%x\n", status); dbg("Writing DCR2 failed status-0x%x\n", status);
break; break;
} else } else
dbg("DCR2 Writing success status%d\n", status); dbg("DCR2 Writing success status%d\n", status);
// write values in clkstart0x0 and clkmulti 0x20 /* write values in clkstart0x0 and clkmulti 0x20 */
Data = 0x0; Data = 0x0;
status = 0; status = mos7840_set_reg_sync(serial->port[i],
status =
mos7840_set_reg_sync(serial->port[i],
CLK_START_VALUE_REGISTER, Data); CLK_START_VALUE_REGISTER, Data);
if (status < 0) { if (status < 0) {
dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
@ -2610,9 +2554,8 @@ static int mos7840_startup(struct usb_serial *serial)
dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
Data = 0x20; Data = 0x20;
status = status = mos7840_set_reg_sync(serial->port[i],
mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER, CLK_MULTI_REGISTER, Data);
Data);
if (status < 0) { if (status < 0) {
dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
status); status);
@ -2621,11 +2564,10 @@ static int mos7840_startup(struct usb_serial *serial)
dbg("CLK_MULTI_REGISTER Writing success status%d\n", dbg("CLK_MULTI_REGISTER Writing success status%d\n",
status); status);
//write value 0x0 to scratchpad register /* write value 0x0 to scratchpad register */
Data = 0x00; Data = 0x00;
status = status = mos7840_set_uart_reg(serial->port[i],
mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER, SCRATCH_PAD_REGISTER, Data);
Data);
if (status < 0) { if (status < 0) {
dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
status); status);
@ -2634,21 +2576,17 @@ static int mos7840_startup(struct usb_serial *serial)
dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
status); status);
//Zero Length flag register /* Zero Length flag register */
if ((mos7840_port->port_num != 1) if ((mos7840_port->port_num != 1)
&& (serial->num_ports == 2)) { && (serial->num_ports == 2)) {
Data = 0xff; Data = 0xff;
status = 0;
status = mos7840_set_reg_sync(serial->port[i], status = mos7840_set_reg_sync(serial->port[i],
(__u16) (ZLP_REG1 + (__u16) (ZLP_REG1 +
((__u16) ((__u16)mos7840_port->port_num)), Data);
mos7840_port->
port_num)),
Data);
dbg("ZLIP offset%x\n", dbg("ZLIP offset%x\n",
(__u16) (ZLP_REG1 + (__u16) (ZLP_REG1 +
((__u16) mos7840_port->port_num))); ((__u16) mos7840_port->port_num)));
if (status < 0) { if (status < 0) {
dbg("Writing ZLP_REG%d failed status-0x%x\n", dbg("Writing ZLP_REG%d failed status-0x%x\n",
i + 2, status); i + 2, status);
@ -2658,13 +2596,9 @@ static int mos7840_startup(struct usb_serial *serial)
i + 2, status); i + 2, status);
} else { } else {
Data = 0xff; Data = 0xff;
status = 0;
status = mos7840_set_reg_sync(serial->port[i], status = mos7840_set_reg_sync(serial->port[i],
(__u16) (ZLP_REG1 + (__u16) (ZLP_REG1 +
((__u16) ((__u16)mos7840_port->port_num) - 0x1), Data);
mos7840_port->
port_num) -
0x1), Data);
dbg("ZLIP offset%x\n", dbg("ZLIP offset%x\n",
(__u16) (ZLP_REG1 + (__u16) (ZLP_REG1 +
((__u16) mos7840_port->port_num) - 0x1)); ((__u16) mos7840_port->port_num) - 0x1));
@ -2679,14 +2613,16 @@ static int mos7840_startup(struct usb_serial *serial)
} }
mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || !mos7840_port->dr) { GFP_KERNEL);
if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
!mos7840_port->dr) {
status = -ENOMEM; status = -ENOMEM;
goto error; goto error;
} }
} }
//Zero Length flag enable /* Zero Length flag enable */
Data = 0x0f; Data = 0x0f;
status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
if (status < 0) { if (status < 0) {
@ -2729,7 +2665,7 @@ static void mos7840_shutdown(struct usb_serial *serial)
return; return;
} }
/* check for the ports to be closed,close the ports and disconnect */ /* check for the ports to be closed,close the ports and disconnect */
/* free private structure allocated for serial port * /* free private structure allocated for serial port *
* stop reads and writes on all ports */ * stop reads and writes on all ports */
@ -2810,20 +2746,12 @@ static int __init moschip7840_init(void)
/* Register with the usb */ /* Register with the usb */
retval = usb_register(&io_driver); retval = usb_register(&io_driver);
if (retval)
goto failed_usb_register;
if (retval == 0) { if (retval == 0) {
dbg("%s\n", "Leaving..."); dbg("%s\n", "Leaving...");
return 0; return 0;
} }
failed_usb_register:
usb_serial_deregister(&moschip7840_4port_device); usb_serial_deregister(&moschip7840_4port_device);
failed_port_device_register:
failed_port_device_register:
return retval; return retval;
} }