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USB: usbserial: mos7720: cleanup, consolidation, replace send_mos_cmd with {read,write}_mos_reg

Browse source 
No functionality added or bugs fixed, just improved code consistency and
(hopefully) readability by replacing send_mos_cmd with the register read & write
functions that were used for parallel port registers.  Also shortens overall
file length.

Thoroughly tested, with emphasis on regression testing the serial port.

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mike Dunn 2010-04-15 17:02:09 -04:00 committed by Greg Kroah-Hartman
parent b69578df7e
commit 63b917678f
1 changed files with 123 additions and 267 deletions
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390
drivers/usb/serial/mos7720.c
View file

@ -39,16 +39,13 @@
/* /*
* Version Information * Version Information
*/ */
#define DRIVER_VERSION "2.0" #define DRIVER_VERSION "2.1"
#define DRIVER_AUTHOR "Aspire Communications pvt Ltd." #define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
#define DRIVER_DESC "Moschip USB Serial Driver" #define DRIVER_DESC "Moschip USB Serial Driver"
/* default urb timeout */ /* default urb timeout */
#define MOS_WDR_TIMEOUT (HZ * 5) #define MOS_WDR_TIMEOUT (HZ * 5)
#define MOS_PORT1 0x0200
#define MOS_PORT2 0x0300
#define MOS_VENREG 0x0000
#define MOS_MAX_PORT 0x02 #define MOS_MAX_PORT 0x02
#define MOS_WRITE 0x0E #define MOS_WRITE 0x0E
#define MOS_READ 0x0D #define MOS_READ 0x0D
@ -126,6 +123,10 @@ struct mos7715_parport {
/* lock guards against dereferencing NULL ptr in parport ops callbacks */ /* lock guards against dereferencing NULL ptr in parport ops callbacks */
static DEFINE_SPINLOCK(release_lock); static DEFINE_SPINLOCK(release_lock);
#endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
static const unsigned int dummy; /* for clarity in register access fns */
enum mos_regs { enum mos_regs {
THR, /* serial port regs */ THR, /* serial port regs */
RHR, RHR,
@ -184,32 +185,35 @@ static inline __u16 get_reg_index(enum mos_regs reg)
* Return the correct value for the upper byte of the Wvalue field of * Return the correct value for the upper byte of the Wvalue field of
* the setup packet for a control endpoint message. * the setup packet for a control endpoint message.
*/ */
static inline __u16 get_reg_value(enum mos_regs reg) static inline __u16 get_reg_value(enum mos_regs reg,
unsigned int serial_portnum)
{ {
if (reg >= SP1_REG) /* control reg */ if (reg >= SP1_REG) /* control reg */
return 0x0000; return 0x0000;
else /* parallel port reg (7715 only) */
else if (reg >= DPR) /* parallel port reg (7715 only) */
return 0x0100; return 0x0100;
else /* serial port reg */
return (serial_portnum + 2) << 8;
} }
/* /*
* Write data byte to the specified device register. The data is embedded in * Write data byte to the specified device register. The data is embedded in
* the value field of the setup packet. * the value field of the setup packet. serial_portnum is ignored for registers
* not specific to a particular serial port.
*/ */
static int write_parport_reg(struct mos7715_parport *mos_parport, static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
enum mos_regs reg, __u8 data) enum mos_regs reg, __u8 data)
{ {
struct usb_serial *serial = mos_parport->serial;
struct usb_device *usbdev = serial->dev; struct usb_device *usbdev = serial->dev;
unsigned int pipe = usb_sndctrlpipe(usbdev, 0); unsigned int pipe = usb_sndctrlpipe(usbdev, 0);
__u8 request = (__u8)0x0e; __u8 request = (__u8)0x0e;
__u8 requesttype = (__u8)0x40; __u8 requesttype = (__u8)0x40;
__u16 value = get_reg_value(reg) + data;
__u16 index = get_reg_index(reg); __u16 index = get_reg_index(reg);
__u16 size = 0; __u16 value = get_reg_value(reg, serial_portnum) + data;
int status; int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
status = usb_control_msg(usbdev, pipe, request, requesttype, value, index, NULL, 0, MOS_WDR_TIMEOUT);
index, NULL, size, MOS_WDR_TIMEOUT);
if (status < 0) if (status < 0)
dev_err(&usbdev->dev, dev_err(&usbdev->dev,
"mos7720: usb_control_msg() failed: %d", status); "mos7720: usb_control_msg() failed: %d", status);
@ -218,31 +222,33 @@ static int write_parport_reg(struct mos7715_parport *mos_parport,
/* /*
* Read data byte from the specified device register. The data returned by the * Read data byte from the specified device register. The data returned by the
* device is embedded in the value field of the setup packet. * device is embedded in the value field of the setup packet. serial_portnum is
* ignored for registers that are not specific to a particular serial port.
*/ */
static int read_parport_reg(struct mos7715_parport *mos_parport, static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
enum mos_regs reg, __u8 *data) enum mos_regs reg, __u8 *data)
{ {
struct usb_device *usbdev = mos_parport->serial->dev; struct usb_device *usbdev = serial->dev;
unsigned int pipe = usb_rcvctrlpipe(usbdev, 0); unsigned int pipe = usb_rcvctrlpipe(usbdev, 0);
__u8 request = (__u8)0x0d; __u8 request = (__u8)0x0d;
__u8 requesttype = (__u8)0xc0; __u8 requesttype = (__u8)0xc0;
__u16 value = get_reg_value(reg);
__u16 index = get_reg_index(reg); __u16 index = get_reg_index(reg);
__u16 size = 1; __u16 value = get_reg_value(reg, serial_portnum);
int status = usb_control_msg(usbdev, pipe, request, requesttype, value, int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
index, data, size, MOS_WDR_TIMEOUT); index, data, 1, MOS_WDR_TIMEOUT);
if (status < 0) if (status < 0)
dev_err(&usbdev->dev, dev_err(&usbdev->dev,
"mos7720: usb_control_msg() failed: %d", status); "mos7720: usb_control_msg() failed: %d", status);
return status; return status;
} }
#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
static inline int mos7715_change_mode(struct mos7715_parport *mos_parport, static inline int mos7715_change_mode(struct mos7715_parport *mos_parport,
enum mos7715_pp_modes mode) enum mos7715_pp_modes mode)
{ {
mos_parport->shadowECR = mode; mos_parport->shadowECR = mode;
write_parport_reg(mos_parport, ECR, mos_parport->shadowECR); write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR);
return 0; return 0;
} }
@ -367,7 +373,7 @@ static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport,
} }
setup.bRequestType = (__u8)0x40; setup.bRequestType = (__u8)0x40;
setup.bRequest = (__u8)0x0e; setup.bRequest = (__u8)0x0e;
setup.wValue = get_reg_value(reg); setup.wValue = get_reg_value(reg, dummy);
setup.wIndex = get_reg_index(reg); setup.wIndex = get_reg_index(reg);
setup.wLength = 0; setup.wLength = 0;
usb_fill_control_urb(urbtrack->urb, usbdev, usb_fill_control_urb(urbtrack->urb, usbdev,
@ -474,7 +480,7 @@ static void parport_mos7715_write_data(struct parport *pp, unsigned char d)
if (parport_prologue(pp) < 0) if (parport_prologue(pp) < 0)
return; return;
mos7715_change_mode(mos_parport, SPP); mos7715_change_mode(mos_parport, SPP);
write_parport_reg(mos_parport, DPR, (__u8)d); write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d);
parport_epilogue(pp); parport_epilogue(pp);
} }
@ -485,7 +491,7 @@ static unsigned char parport_mos7715_read_data(struct parport *pp)
dbg("%s called", __func__); dbg("%s called", __func__);
if (parport_prologue(pp) < 0) if (parport_prologue(pp) < 0)
return 0; return 0;
read_parport_reg(mos_parport, DPR, &d); read_mos_reg(mos_parport->serial, dummy, DPR, &d);
parport_epilogue(pp); parport_epilogue(pp);
return d; return d;
} }
@ -498,7 +504,7 @@ static void parport_mos7715_write_control(struct parport *pp, unsigned char d)
if (parport_prologue(pp) < 0) if (parport_prologue(pp) < 0)
return; return;
data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0); data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0);
write_parport_reg(mos_parport, DCR, data); write_mos_reg(mos_parport->serial, dummy, DCR, data);
mos_parport->shadowDCR = data; mos_parport->shadowDCR = data;
parport_epilogue(pp); parport_epilogue(pp);
} }
@ -531,7 +537,7 @@ static unsigned char parport_mos7715_frob_control(struct parport *pp,
if (parport_prologue(pp) < 0) if (parport_prologue(pp) < 0)
return 0; return 0;
mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val; mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val;
write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
dcr = mos_parport->shadowDCR & 0x0f; dcr = mos_parport->shadowDCR & 0x0f;
parport_epilogue(pp); parport_epilogue(pp);
return dcr; return dcr;
@ -570,7 +576,7 @@ static void parport_mos7715_data_forward(struct parport *pp)
return; return;
mos7715_change_mode(mos_parport, PS2); mos7715_change_mode(mos_parport, PS2);
mos_parport->shadowDCR &= ~0x20; mos_parport->shadowDCR &= ~0x20;
write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
parport_epilogue(pp); parport_epilogue(pp);
} }
@ -582,7 +588,7 @@ static void parport_mos7715_data_reverse(struct parport *pp)
return; return;
mos7715_change_mode(mos_parport, PS2); mos7715_change_mode(mos_parport, PS2);
mos_parport->shadowDCR |= 0x20; mos_parport->shadowDCR |= 0x20;
write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
parport_epilogue(pp); parport_epilogue(pp);
} }
@ -705,14 +711,14 @@ static int mos7715_parport_init(struct usb_serial *serial)
init_completion(&mos_parport->syncmsg_compl); init_completion(&mos_parport->syncmsg_compl);
/* cycle parallel port reset bit */ /* cycle parallel port reset bit */
write_parport_reg(mos_parport, PP_REG, (__u8)0x80); write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80);
write_parport_reg(mos_parport, PP_REG, (__u8)0x00); write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00);
/* initialize device registers */ /* initialize device registers */
mos_parport->shadowDCR = DCR_INIT_VAL; mos_parport->shadowDCR = DCR_INIT_VAL;
write_parport_reg(mos_parport, DCR, mos_parport->shadowDCR); write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
mos_parport->shadowECR = ECR_INIT_VAL; mos_parport->shadowECR = ECR_INIT_VAL;
write_parport_reg(mos_parport, ECR, mos_parport->shadowECR); write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR);
/* register with parport core */ /* register with parport core */
mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE, mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE,
@ -754,7 +760,6 @@ static void mos7720_interrupt_callback(struct urb *urb)
case -ECONNRESET: case -ECONNRESET:
case -ENOENT: case -ENOENT:
case -ESHUTDOWN: case -ESHUTDOWN:
case -ENODEV:
/* this urb is terminated, clean up */ /* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d", __func__, dbg("%s - urb shutting down with status: %d", __func__,
status); status);
@ -980,56 +985,6 @@ static void mos7720_bulk_out_data_callback(struct urb *urb)
tty_kref_put(tty); tty_kref_put(tty);
} }
/*
* send_mos_cmd
* this function will be used for sending command to device
*/
static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
__u16 index, u8 *data)
{
int status;
u8 *buf;
u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
if (value < MOS_MAX_PORT) {
if (product == MOSCHIP_DEVICE_ID_7715)
value = 0x0200; /* identifies the 7715's serial port */
else
value = value*0x100+0x200;
} else {
value = 0x0000;
if ((product == MOSCHIP_DEVICE_ID_7715) &&
(index != 0x08)) {
dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
/* index = 0x01 ; */
}
}
if (request == MOS_WRITE) {
value = value + *data;
status = usb_control_msg(serial->dev,
usb_sndctrlpipe(serial->dev, 0), MOS_WRITE,
0x40, value, index, NULL, 0, MOS_WDR_TIMEOUT);
} else {
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
status = -ENOMEM;
goto out;
}
status = usb_control_msg(serial->dev,
usb_rcvctrlpipe(serial->dev, 0), MOS_READ,
0xc0, value, index, buf, 1, MOS_WDR_TIMEOUT);
*data = *buf;
kfree(buf);
}
out:
if (status < 0)
dbg("Command Write failed Value %x index %x", value, index);
return status;
}
/* /*
* mos77xx_probe * mos77xx_probe
* this function installs the appropriate read interrupt endpoint callback * this function installs the appropriate read interrupt endpoint callback
@ -1066,7 +1021,7 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
struct moschip_port *mos7720_port; struct moschip_port *mos7720_port;
int response; int response;
int port_number; int port_number;
char data; __u8 data;
int allocated_urbs = 0; int allocated_urbs = 0;
int j; int j;
@ -1122,65 +1077,35 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
* 0x08 : SP1/2 Control Reg * 0x08 : SP1/2 Control Reg
*/ */
port_number = port->number - port->serial->minor; port_number = port->number - port->serial->minor;
send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data); read_mos_reg(serial, port_number, LSR, &data);
dbg("SS::%p LSR:%x", mos7720_port, data); dbg("SS::%p LSR:%x", mos7720_port, data);
dbg("Check:Sending Command .........."); dbg("Check:Sending Command ..........");
data = 0x02; write_mos_reg(serial, dummy, SP1_REG, 0x02);
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data); write_mos_reg(serial, dummy, SP2_REG, 0x02);
data = 0x02;
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
data = 0x00; write_mos_reg(serial, port_number, IER, 0x00);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); write_mos_reg(serial, port_number, FCR, 0x00);
data = 0x00;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
data = 0xCF; write_mos_reg(serial, port_number, FCR, 0xcf);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); mos7720_port->shadowLCR = 0x03;
data = 0x03; write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
mos7720_port->shadowLCR = data; mos7720_port->shadowMCR = 0x0b;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
data = 0x0b;
mos7720_port->shadowMCR = data;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
data = 0x0b;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
data = 0x00;
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
data = 0x00;
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
/* data = 0x00;
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
data = 0x03;
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
data = 0x00;
send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT,
port_number + 1, &data);
*/
data = 0x00;
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00);
read_mos_reg(serial, dummy, SP_CONTROL_REG, &data);
data = data | (port->number - port->serial->minor + 1); data = data | (port->number - port->serial->minor + 1);
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); write_mos_reg(serial, dummy, SP_CONTROL_REG, data);
mos7720_port->shadowLCR = 0x83;
data = 0x83; write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
mos7720_port->shadowLCR = data; write_mos_reg(serial, port_number, THR, 0x0c);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); write_mos_reg(serial, port_number, IER, 0x00);
data = 0x0c; mos7720_port->shadowLCR = 0x03;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
data = 0x00; write_mos_reg(serial, port_number, IER, 0x0c);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
data = 0x03;
mos7720_port->shadowLCR = data;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
data = 0x0c;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
data = 0x0c;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
response = usb_submit_urb(port->read_urb, GFP_KERNEL); response = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (response) if (response)
@ -1236,7 +1161,6 @@ static void mos7720_close(struct usb_serial_port *port)
{ {
struct usb_serial *serial; struct usb_serial *serial;
struct moschip_port *mos7720_port; struct moschip_port *mos7720_port;
char data;
int j; int j;
dbg("mos7720_close:entering..."); dbg("mos7720_close:entering...");
@ -1269,13 +1193,10 @@ static void mos7720_close(struct usb_serial_port *port)
/* these commands must not be issued if the device has /* these commands must not be issued if the device has
* been disconnected */ * been disconnected */
if (!serial->disconnected) { if (!serial->disconnected) {
data = 0x00; write_mos_reg(serial, port->number - port->serial->minor,
send_mos_cmd(serial, MOS_WRITE, MCR, 0x00);
port->number - port->serial->minor, 0x04, &data); write_mos_reg(serial, port->number - port->serial->minor,
IER, 0x00);
data = 0x00;
send_mos_cmd(serial, MOS_WRITE,
port->number - port->serial->minor, 0x01, &data);
} }
mutex_unlock(&serial->disc_mutex); mutex_unlock(&serial->disc_mutex);
mos7720_port->open = 0; mos7720_port->open = 0;
@ -1304,8 +1225,8 @@ static void mos7720_break(struct tty_struct *tty, int break_state)
data = mos7720_port->shadowLCR & ~UART_LCR_SBC; data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
mos7720_port->shadowLCR = data; mos7720_port->shadowLCR = data;
send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, write_mos_reg(serial, port->number - port->serial->minor,
0x03, &data); LCR, mos7720_port->shadowLCR);
return; return;
} }
@ -1450,9 +1371,8 @@ static void mos7720_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) {
mos7720_port->shadowMCR &= ~UART_MCR_RTS; mos7720_port->shadowMCR &= ~UART_MCR_RTS;
status = send_mos_cmd(port->serial, MOS_WRITE, write_mos_reg(port->serial, port->number - port->serial->minor,
port->number - port->serial->minor, MCR, mos7720_port->shadowMCR);
UART_MCR, &mos7720_port->shadowMCR);
if (status != 0) if (status != 0)
return; return;
} }
@ -1485,9 +1405,8 @@ static void mos7720_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) {
mos7720_port->shadowMCR |= UART_MCR_RTS; mos7720_port->shadowMCR |= UART_MCR_RTS;
status = send_mos_cmd(port->serial, MOS_WRITE, write_mos_reg(port->serial, port->number - port->serial->minor,
port->number - port->serial->minor, MCR, mos7720_port->shadowMCR);
UART_MCR, &mos7720_port->shadowMCR);
if (status != 0) if (status != 0)
return; return;
} }
@ -1497,11 +1416,10 @@ static void mos7720_unthrottle(struct tty_struct *tty)
static int set_higher_rates(struct moschip_port *mos7720_port, static int set_higher_rates(struct moschip_port *mos7720_port,
unsigned int baud) unsigned int baud)
{ {
unsigned char data;
struct usb_serial_port *port; struct usb_serial_port *port;
struct usb_serial *serial; struct usb_serial *serial;
int port_number; int port_number;
enum mos_regs sp_reg;
if (mos7720_port == NULL) if (mos7720_port == NULL)
return -EINVAL; return -EINVAL;
@ -1514,59 +1432,35 @@ static int set_higher_rates(struct moschip_port *mos7720_port,
dbg("Sending Setting Commands .........."); dbg("Sending Setting Commands ..........");
port_number = port->number - port->serial->minor; port_number = port->number - port->serial->minor;
data = 0x000; write_mos_reg(serial, port_number, IER, 0x00);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); write_mos_reg(serial, port_number, FCR, 0x00);
data = 0x000; write_mos_reg(serial, port_number, FCR, 0xcf);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); mos7720_port->shadowMCR = 0x0b;
data = 0x0CF; write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data); write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00);
data = 0x00b;
mos7720_port->shadowMCR = data;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
data = 0x00b;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
data = 0x000;
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
data = 0x000;
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
/*********************************************** /***********************************************
* Set for higher rates * * Set for higher rates *
***********************************************/ ***********************************************/
/* writing baud rate verbatum into uart clock field clearly not right */ /* writing baud rate verbatum into uart clock field clearly not right */
data = baud * 0x10; if (port_number == 0)
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); sp_reg = SP1_REG;
else
data = 0x003; sp_reg = SP2_REG;
send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); write_mos_reg(serial, dummy, sp_reg, baud * 0x10);
data = 0x003; write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03);
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); mos7720_port->shadowMCR = 0x2b;
write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
data = 0x02b;
mos7720_port->shadowMCR = data;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
data = 0x02b;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
/*********************************************** /***********************************************
* Set DLL/DLM * Set DLL/DLM
***********************************************/ ***********************************************/
mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB;
data = mos7720_port->shadowLCR | UART_LCR_DLAB; write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
mos7720_port->shadowLCR = data; write_mos_reg(serial, port_number, DLL, 0x01);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); write_mos_reg(serial, port_number, DLM, 0x00);
mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
data = 0x001; /* DLL */ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
data = 0x000; /* DLM */
send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
mos7720_port->shadowLCR = data;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
return 0; return 0;
} }
@ -1654,7 +1548,6 @@ static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
struct usb_serial *serial; struct usb_serial *serial;
int divisor; int divisor;
int status; int status;
unsigned char data;
unsigned char number; unsigned char number;
if (mos7720_port == NULL) if (mos7720_port == NULL)
@ -1676,21 +1569,16 @@ static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
} }
/* Enable access to divisor latch */ /* Enable access to divisor latch */
data = mos7720_port->shadowLCR | UART_LCR_DLAB; mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB;
mos7720_port->shadowLCR = data; write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR);
send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
/* Write the divisor */ /* Write the divisor */
data = ((unsigned char)(divisor & 0xff)); write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff));
send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data); write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8));
data = ((unsigned char)((divisor & 0xff00) >> 8));
send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
/* Disable access to divisor latch */ /* Disable access to divisor latch */
data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
mos7720_port->shadowLCR = data; write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR);
send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
return status; return status;
} }
@ -1715,7 +1603,6 @@ static void change_port_settings(struct tty_struct *tty,
__u8 lStop; __u8 lStop;
int status; int status;
int port_number; int port_number;
char data;
if (mos7720_port == NULL) if (mos7720_port == NULL)
return ; return ;
@ -1794,30 +1681,19 @@ static void change_port_settings(struct tty_struct *tty,
/* Update the LCR with the correct value */ /* Update the LCR with the correct value */
mos7720_port->shadowLCR &= mos7720_port->shadowLCR &=
~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
mos7720_port->shadowLCR |= (lData | lParity | lStop); mos7720_port->shadowLCR |= (lData | lParity | lStop);
/* Disable Interrupts */ /* Disable Interrupts */
data = 0x00; write_mos_reg(serial, port_number, IER, 0x00);
send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, write_mos_reg(serial, port_number, FCR, 0x00);
UART_IER, &data); write_mos_reg(serial, port_number, FCR, 0xcf);
data = 0x00;
send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
data = 0xcf;
send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
/* Send the updated LCR value to the mos7720 */ /* Send the updated LCR value to the mos7720 */
data = mos7720_port->shadowLCR; write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data); mos7720_port->shadowMCR = 0x0b;
write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
data = 0x00b;
mos7720_port->shadowMCR = data;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
data = 0x00b;
send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
/* set up the MCR register and send it to the mos7720 */ /* set up the MCR register and send it to the mos7720 */
mos7720_port->shadowMCR = UART_MCR_OUT2; mos7720_port->shadowMCR = UART_MCR_OUT2;
@ -1828,21 +1704,15 @@ static void change_port_settings(struct tty_struct *tty,
mos7720_port->shadowMCR |= (UART_MCR_XONANY); mos7720_port->shadowMCR |= (UART_MCR_XONANY);
/* To set hardware flow control to the specified * /* To set hardware flow control to the specified *
* serial port, in SP1/2_CONTROL_REG */ * serial port, in SP1/2_CONTROL_REG */
if (port->number) { if (port->number)
data = 0x001; write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01);
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, else
0x08, &data); write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02);
} else {
data = 0x002;
send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
0x08, &data);
}
} else {
mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
}
data = mos7720_port->shadowMCR; } else
send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data); mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
/* Determine divisor based on baud rate */ /* Determine divisor based on baud rate */
baud = tty_get_baud_rate(tty); baud = tty_get_baud_rate(tty);
@ -1855,8 +1725,7 @@ static void change_port_settings(struct tty_struct *tty,
if (baud >= 230400) { if (baud >= 230400) {
set_higher_rates(mos7720_port, baud); set_higher_rates(mos7720_port, baud);
/* Enable Interrupts */ /* Enable Interrupts */
data = 0x0c; write_mos_reg(serial, port_number, IER, 0x0c);
send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
return; return;
} }
@ -1867,8 +1736,7 @@ static void change_port_settings(struct tty_struct *tty,
if (cflag & CBAUD) if (cflag & CBAUD)
tty_encode_baud_rate(tty, baud, baud); tty_encode_baud_rate(tty, baud, baud);
/* Enable Interrupts */ /* Enable Interrupts */
data = 0x0c; write_mos_reg(serial, port_number, IER, 0x0c);
send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
if (port->read_urb->status != -EINPROGRESS) { if (port->read_urb->status != -EINPROGRESS) {
port->read_urb->dev = serial->dev; port->read_urb->dev = serial->dev;
@ -1959,8 +1827,7 @@ static int get_lsr_info(struct tty_struct *tty,
count = mos7720_chars_in_buffer(tty); count = mos7720_chars_in_buffer(tty);
if (count == 0) { if (count == 0) {
send_mos_cmd(port->serial, MOS_READ, port_number, read_mos_reg(port->serial, port_number, LSR, &data);
UART_LSR, &data);
if ((data & (UART_LSR_TEMT | UART_LSR_THRE)) if ((data & (UART_LSR_TEMT | UART_LSR_THRE))
== (UART_LSR_TEMT | UART_LSR_THRE)) { == (UART_LSR_TEMT | UART_LSR_THRE)) {
dbg("%s -- Empty", __func__); dbg("%s -- Empty", __func__);
@ -1998,13 +1865,11 @@ static int mos7720_tiocmget(struct tty_struct *tty, struct file *file)
} }
static int mos7720_tiocmset(struct tty_struct *tty, struct file *file, static int mos7720_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear) unsigned int set, unsigned int clear)
{ {
struct usb_serial_port *port = tty->driver_data; struct usb_serial_port *port = tty->driver_data;
struct moschip_port *mos7720_port = usb_get_serial_port_data(port); struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
unsigned int mcr ; unsigned int mcr ;
unsigned char lmcr;
dbg("%s - port %d", __func__, port->number); dbg("%s - port %d", __func__, port->number);
dbg("he was at tiocmget"); dbg("he was at tiocmget");
@ -2025,10 +1890,8 @@ static int mos7720_tiocmset(struct tty_struct *tty, struct file *file,
mcr &= ~UART_MCR_LOOP; mcr &= ~UART_MCR_LOOP;
mos7720_port->shadowMCR = mcr; mos7720_port->shadowMCR = mcr;
lmcr = mos7720_port->shadowMCR; write_mos_reg(port->serial, port->number - port->serial->minor,
MCR, mos7720_port->shadowMCR);
send_mos_cmd(port->serial, MOS_WRITE,
port->number - port->serial->minor, UART_MCR, &lmcr);
return 0; return 0;
} }
@ -2038,7 +1901,6 @@ static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
{ {
unsigned int mcr ; unsigned int mcr ;
unsigned int arg; unsigned int arg;
unsigned char data;
struct usb_serial_port *port; struct usb_serial_port *port;
@ -2073,10 +1935,8 @@ static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
} }
mos7720_port->shadowMCR = mcr; mos7720_port->shadowMCR = mcr;
write_mos_reg(port->serial, port->number - port->serial->minor,
data = mos7720_port->shadowMCR; MCR, mos7720_port->shadowMCR);
send_mos_cmd(port->serial, MOS_WRITE,
port->number - port->serial->minor, UART_MCR, &data);
return 0; return 0;
} }
@ -2269,11 +2129,7 @@ static int mos7720_startup(struct usb_serial *serial)
} }
#endif #endif
/* LSR For Port 1 */ /* LSR For Port 1 */
send_mos_cmd(serial, MOS_READ, 0x00, UART_LSR, &data); read_mos_reg(serial, 0, LSR, &data);
dbg("LSR:%x", data);
/* LSR For Port 2 */
send_mos_cmd(serial, MOS_READ, 0x01, UART_LSR, &data);
dbg("LSR:%x", data); dbg("LSR:%x", data);
return 0; return 0;