| /* |
| * 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. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * Clean ups from Moschip version and a few ioctl implementations by: |
| * Paul B Schroeder <pschroeder "at" uplogix "dot" com> |
| * |
| * Originally based on drivers/usb/serial/io_edgeport.c which is: |
| * Copyright (C) 2000 Inside Out Networks, All rights reserved. |
| * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> |
| * |
| */ |
| |
| #include <linux/kernel.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/serial.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| #include <linux/uaccess.h> |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_VERSION "1.3.1" |
| #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" |
| |
| /* |
| * 16C50 UART register defines |
| */ |
| |
| #define LCR_BITS_5 0x00 /* 5 bits/char */ |
| #define LCR_BITS_6 0x01 /* 6 bits/char */ |
| #define LCR_BITS_7 0x02 /* 7 bits/char */ |
| #define LCR_BITS_8 0x03 /* 8 bits/char */ |
| #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ |
| |
| #define LCR_STOP_1 0x00 /* 1 stop bit */ |
| #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ |
| #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ |
| #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ |
| |
| #define LCR_PAR_NONE 0x00 /* No parity */ |
| #define LCR_PAR_ODD 0x08 /* Odd parity */ |
| #define LCR_PAR_EVEN 0x18 /* Even parity */ |
| #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ |
| #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ |
| #define LCR_PAR_MASK 0x38 /* Mask for parity field */ |
| |
| #define LCR_SET_BREAK 0x40 /* Set Break condition */ |
| #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ |
| |
| #define MCR_DTR 0x01 /* Assert DTR */ |
| #define MCR_RTS 0x02 /* Assert RTS */ |
| #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ |
| #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ |
| #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ |
| #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ |
| |
| #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ |
| #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ |
| #define MOS7840_MSR_RI 0x40 /* Current state of RI */ |
| #define MOS7840_MSR_CD 0x80 /* Current state of CD */ |
| |
| /* |
| * Defines used for sending commands to port |
| */ |
| |
| #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */ |
| #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */ |
| |
| #define MOS_PORT1 0x0200 |
| #define MOS_PORT2 0x0300 |
| #define MOS_VENREG 0x0000 |
| #define MOS_MAX_PORT 0x02 |
| #define MOS_WRITE 0x0E |
| #define MOS_READ 0x0D |
| |
| /* Requests */ |
| #define MCS_RD_RTYPE 0xC0 |
| #define MCS_WR_RTYPE 0x40 |
| #define MCS_RDREQ 0x0D |
| #define MCS_WRREQ 0x0E |
| #define MCS_CTRL_TIMEOUT 500 |
| #define VENDOR_READ_LENGTH (0x01) |
| |
| #define MAX_NAME_LEN 64 |
| |
| #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ |
| #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ |
| |
| /* For higher baud Rates use TIOCEXBAUD */ |
| #define TIOCEXBAUD 0x5462 |
| |
| /* vendor id and device id defines */ |
| |
| /* The native mos7840/7820 component */ |
| #define USB_VENDOR_ID_MOSCHIP 0x9710 |
| #define MOSCHIP_DEVICE_ID_7840 0x7840 |
| #define MOSCHIP_DEVICE_ID_7820 0x7820 |
| /* The native component can have its vendor/device id's overridden |
| * in vendor-specific implementations. Such devices can be handled |
| * by making a change here, in moschip_port_id_table, and in |
| * moschip_id_table_combined |
| */ |
| #define USB_VENDOR_ID_BANDB 0x0856 |
| #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 |
| #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 |
| |
| /* Interrupt Routine Defines */ |
| |
| #define SERIAL_IIR_RLS 0x06 |
| #define SERIAL_IIR_MS 0x00 |
| |
| /* |
| * Emulation of the bit mask on the LINE STATUS REGISTER. |
| */ |
| #define SERIAL_LSR_DR 0x0001 |
| #define SERIAL_LSR_OE 0x0002 |
| #define SERIAL_LSR_PE 0x0004 |
| #define SERIAL_LSR_FE 0x0008 |
| #define SERIAL_LSR_BI 0x0010 |
| |
| #define MOS_MSR_DELTA_CTS 0x10 |
| #define MOS_MSR_DELTA_DSR 0x20 |
| #define MOS_MSR_DELTA_RI 0x40 |
| #define MOS_MSR_DELTA_CD 0x80 |
| |
| /* Serial Port register Address */ |
| #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) |
| #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) |
| #define LINE_CONTROL_REGISTER ((__u16)(0x03)) |
| #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) |
| #define LINE_STATUS_REGISTER ((__u16)(0x05)) |
| #define MODEM_STATUS_REGISTER ((__u16)(0x06)) |
| #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) |
| #define DIVISOR_LATCH_LSB ((__u16)(0x00)) |
| #define DIVISOR_LATCH_MSB ((__u16)(0x01)) |
| |
| #define CLK_MULTI_REGISTER ((__u16)(0x02)) |
| #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) |
| |
| #define SERIAL_LCR_DLAB ((__u16)(0x0080)) |
| |
| /* |
| * URB POOL related defines |
| */ |
| #define NUM_URBS 16 /* URB Count */ |
| #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ |
| |
| |
| static struct usb_device_id moschip_port_id_table[] = { |
| {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
| {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, |
| {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
| {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
| {} /* terminating entry */ |
| }; |
| |
| static __devinitdata struct usb_device_id moschip_id_table_combined[] = { |
| {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, |
| {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, |
| {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, |
| {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, |
| {} /* terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, moschip_id_table_combined); |
| |
| /* This structure holds all of the local port information */ |
| |
| struct moschip_port { |
| int port_num; /*Actual port number in the device(1,2,etc) */ |
| struct urb *write_urb; /* write URB for this port */ |
| struct urb *read_urb; /* read URB for this port */ |
| struct urb *int_urb; |
| __u8 shadowLCR; /* last LCR value received */ |
| __u8 shadowMCR; /* last MCR value received */ |
| char open; |
| char open_ports; |
| char zombie; |
| wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
| wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ |
| int delta_msr_cond; |
| struct async_icount icount; |
| struct usb_serial_port *port; /* loop back to the owner of this object */ |
| |
| /* Offsets */ |
| __u8 SpRegOffset; |
| __u8 ControlRegOffset; |
| __u8 DcrRegOffset; |
| /* for processing control URBS in interrupt context */ |
| struct urb *control_urb; |
| struct usb_ctrlrequest *dr; |
| char *ctrl_buf; |
| int MsrLsr; |
| |
| spinlock_t pool_lock; |
| struct urb *write_urb_pool[NUM_URBS]; |
| char busy[NUM_URBS]; |
| }; |
| |
| |
| static int debug; |
| |
| /* |
| * mos7840_set_reg_sync |
| * To set the Control register by calling usb_fill_control_urb function |
| * by passing usb_sndctrlpipe function as parameter. |
| */ |
| |
| static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, |
| __u16 val) |
| { |
| struct usb_device *dev = port->serial->dev; |
| val = val & 0x00ff; |
| dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val); |
| |
| return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
| MCS_WR_RTYPE, val, reg, NULL, 0, |
| MOS_WDR_TIMEOUT); |
| } |
| |
| /* |
| * mos7840_get_reg_sync |
| * To set the Uart register by calling usb_fill_control_urb function by |
| * passing usb_rcvctrlpipe function as parameter. |
| */ |
| |
| static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, |
| __u16 *val) |
| { |
| struct usb_device *dev = port->serial->dev; |
| int ret = 0; |
| |
| ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
| MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH, |
| MOS_WDR_TIMEOUT); |
| dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val); |
| *val = (*val) & 0x00ff; |
| return ret; |
| } |
| |
| /* |
| * mos7840_set_uart_reg |
| * To set the Uart register by calling usb_fill_control_urb function by |
| * passing usb_sndctrlpipe function as parameter. |
| */ |
| |
| static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, |
| __u16 val) |
| { |
| |
| struct usb_device *dev = port->serial->dev; |
| val = val & 0x00ff; |
| /* For the UART control registers, the application number need |
| to be Or'ed */ |
| if (port->serial->num_ports == 4) { |
| val |= (((__u16) port->number - |
| (__u16) (port->serial->minor)) + 1) << 8; |
| dbg("mos7840_set_uart_reg application number is %x\n", val); |
| } else { |
| if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { |
| val |= (((__u16) port->number - |
| (__u16) (port->serial->minor)) + 1) << 8; |
| dbg("mos7840_set_uart_reg application number is %x\n", |
| val); |
| } else { |
| val |= |
| (((__u16) port->number - |
| (__u16) (port->serial->minor)) + 2) << 8; |
| dbg("mos7840_set_uart_reg application number is %x\n", |
| val); |
| } |
| } |
| return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, |
| MCS_WR_RTYPE, val, reg, NULL, 0, |
| MOS_WDR_TIMEOUT); |
| |
| } |
| |
| /* |
| * mos7840_get_uart_reg |
| * To set the Control register by calling usb_fill_control_urb function |
| * by passing usb_rcvctrlpipe function as parameter. |
| */ |
| static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, |
| __u16 *val) |
| { |
| struct usb_device *dev = port->serial->dev; |
| int ret = 0; |
| __u16 Wval; |
| |
| /* dbg("application number is %4x \n", |
| (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */ |
| /* Wval is same as application number */ |
| if (port->serial->num_ports == 4) { |
| Wval = |
| (((__u16) port->number - (__u16) (port->serial->minor)) + |
| 1) << 8; |
| dbg("mos7840_get_uart_reg application number is %x\n", Wval); |
| } else { |
| if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { |
| Wval = (((__u16) port->number - |
| (__u16) (port->serial->minor)) + 1) << 8; |
| dbg("mos7840_get_uart_reg application number is %x\n", |
| Wval); |
| } else { |
| Wval = (((__u16) port->number - |
| (__u16) (port->serial->minor)) + 2) << 8; |
| dbg("mos7840_get_uart_reg application number is %x\n", |
| Wval); |
| } |
| } |
| ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, |
| MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH, |
| MOS_WDR_TIMEOUT); |
| *val = (*val) & 0x00ff; |
| return ret; |
| } |
| |
| static void mos7840_dump_serial_port(struct moschip_port *mos7840_port) |
| { |
| |
| dbg("***************************************\n"); |
| dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset); |
| dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset); |
| dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset); |
| dbg("***************************************\n"); |
| |
| } |
| |
| /************************************************************************/ |
| /************************************************************************/ |
| /* I N T E R F A C E F U N C T I O N S */ |
| /* I N T E R F A C E F U N C T I O N S */ |
| /************************************************************************/ |
| /************************************************************************/ |
| |
| static inline void mos7840_set_port_private(struct usb_serial_port *port, |
| struct moschip_port *data) |
| { |
| usb_set_serial_port_data(port, (void *)data); |
| } |
| |
| static inline struct moschip_port *mos7840_get_port_private(struct |
| usb_serial_port |
| *port) |
| { |
| return (struct moschip_port *)usb_get_serial_port_data(port); |
| } |
| |
| static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) |
| { |
| struct moschip_port *mos7840_port; |
| struct async_icount *icount; |
| mos7840_port = port; |
| icount = &mos7840_port->icount; |
| if (new_msr & |
| (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | |
| MOS_MSR_DELTA_CD)) { |
| icount = &mos7840_port->icount; |
| |
| /* update input line counters */ |
| if (new_msr & MOS_MSR_DELTA_CTS) { |
| icount->cts++; |
| smp_wmb(); |
| } |
| if (new_msr & MOS_MSR_DELTA_DSR) { |
| icount->dsr++; |
| smp_wmb(); |
| } |
| if (new_msr & MOS_MSR_DELTA_CD) { |
| icount->dcd++; |
| smp_wmb(); |
| } |
| if (new_msr & MOS_MSR_DELTA_RI) { |
| icount->rng++; |
| smp_wmb(); |
| } |
| } |
| } |
| |
| static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) |
| { |
| struct async_icount *icount; |
| |
| dbg("%s - %02x", __func__, new_lsr); |
| |
| if (new_lsr & SERIAL_LSR_BI) { |
| /* |
| * Parity and Framing errors only count if they |
| * occur exclusive of a break being |
| * received. |
| */ |
| new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); |
| } |
| |
| /* update input line counters */ |
| icount = &port->icount; |
| if (new_lsr & SERIAL_LSR_BI) { |
| icount->brk++; |
| smp_wmb(); |
| } |
| if (new_lsr & SERIAL_LSR_OE) { |
| icount->overrun++; |
| smp_wmb(); |
| } |
| if (new_lsr & SERIAL_LSR_PE) { |
| icount->parity++; |
| smp_wmb(); |
| } |
| if (new_lsr & SERIAL_LSR_FE) { |
| icount->frame++; |
| smp_wmb(); |
| } |
| } |
| |
| /************************************************************************/ |
| /************************************************************************/ |
| /* 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 */ |
| /************************************************************************/ |
| /************************************************************************/ |
| |
| static void mos7840_control_callback(struct urb *urb) |
| { |
| unsigned char *data; |
| struct moschip_port *mos7840_port; |
| __u8 regval = 0x0; |
| int result = 0; |
| int status = urb->status; |
| |
| mos7840_port = urb->context; |
| |
| 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; |
| } |
| |
| dbg("%s urb buffer size is %d\n", __func__, urb->actual_length); |
| dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__, |
| mos7840_port->MsrLsr, mos7840_port->port_num); |
| data = urb->transfer_buffer; |
| regval = (__u8) data[0]; |
| dbg("%s data is %x\n", __func__, regval); |
| if (mos7840_port->MsrLsr == 0) |
| mos7840_handle_new_msr(mos7840_port, regval); |
| else if (mos7840_port->MsrLsr == 1) |
| mos7840_handle_new_lsr(mos7840_port, regval); |
| |
| exit: |
| spin_lock(&mos7840_port->pool_lock); |
| if (!mos7840_port->zombie) |
| result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); |
| spin_unlock(&mos7840_port->pool_lock); |
| if (result) { |
| dev_err(&urb->dev->dev, |
| "%s - Error %d submitting interrupt urb\n", |
| __func__, result); |
| } |
| } |
| |
| static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, |
| __u16 *val) |
| { |
| struct usb_device *dev = mcs->port->serial->dev; |
| struct usb_ctrlrequest *dr = mcs->dr; |
| unsigned char *buffer = mcs->ctrl_buf; |
| int ret; |
| |
| dr->bRequestType = MCS_RD_RTYPE; |
| dr->bRequest = MCS_RDREQ; |
| dr->wValue = cpu_to_le16(Wval); /* 0 */ |
| dr->wIndex = cpu_to_le16(reg); |
| dr->wLength = cpu_to_le16(2); |
| |
| usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), |
| (unsigned char *)dr, buffer, 2, |
| mos7840_control_callback, mcs); |
| mcs->control_urb->transfer_buffer_length = 2; |
| ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); |
| return ret; |
| } |
| |
| /***************************************************************************** |
| * mos7840_interrupt_callback |
| * this is the callback function for when we have received data on the |
| * interrupt endpoint. |
| *****************************************************************************/ |
| |
| static void mos7840_interrupt_callback(struct urb *urb) |
| { |
| int result; |
| int length; |
| struct moschip_port *mos7840_port; |
| struct usb_serial *serial; |
| __u16 Data; |
| unsigned char *data; |
| __u8 sp[5], st; |
| int i, rv = 0; |
| __u16 wval, wreg = 0; |
| int status = urb->status; |
| |
| dbg("%s", " : Entering\n"); |
| |
| 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; |
| } |
| |
| length = urb->actual_length; |
| data = urb->transfer_buffer; |
| |
| serial = urb->context; |
| |
| /* Moschip get 5 bytes |
| * Byte 1 IIR Port 1 (port.number is 0) |
| * Byte 2 IIR Port 2 (port.number is 1) |
| * Byte 3 IIR Port 3 (port.number is 2) |
| * Byte 4 IIR Port 4 (port.number is 3) |
| * Byte 5 FIFO status for both */ |
| |
| if (length && length > 5) { |
| dbg("%s \n", "Wrong data !!!"); |
| return; |
| } |
| |
| sp[0] = (__u8) data[0]; |
| sp[1] = (__u8) data[1]; |
| sp[2] = (__u8) data[2]; |
| sp[3] = (__u8) data[3]; |
| st = (__u8) data[4]; |
| |
| for (i = 0; i < serial->num_ports; i++) { |
| mos7840_port = mos7840_get_port_private(serial->port[i]); |
| wval = |
| (((__u16) serial->port[i]->number - |
| (__u16) (serial->minor)) + 1) << 8; |
| if (mos7840_port->open) { |
| if (sp[i] & 0x01) { |
| dbg("SP%d No Interrupt !!!\n", i); |
| } else { |
| switch (sp[i] & 0x0f) { |
| case SERIAL_IIR_RLS: |
| dbg("Serial Port %d: Receiver status error or ", i); |
| dbg("address bit detected in 9-bit mode\n"); |
| mos7840_port->MsrLsr = 1; |
| wreg = LINE_STATUS_REGISTER; |
| break; |
| case SERIAL_IIR_MS: |
| dbg("Serial Port %d: Modem status change\n", i); |
| mos7840_port->MsrLsr = 0; |
| wreg = MODEM_STATUS_REGISTER; |
| break; |
| } |
| spin_lock(&mos7840_port->pool_lock); |
| if (!mos7840_port->zombie) { |
| rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); |
| } else { |
| spin_unlock(&mos7840_port->pool_lock); |
| return; |
| } |
| spin_unlock(&mos7840_port->pool_lock); |
| } |
| } |
| } |
| if (!(rv < 0)) |
| /* the completion handler for the control urb will resubmit */ |
| return; |
| exit: |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(&urb->dev->dev, |
| "%s - Error %d submitting interrupt urb\n", |
| __func__, result); |
| } |
| } |
| |
| static int mos7840_port_paranoia_check(struct usb_serial_port *port, |
| const char *function) |
| { |
| if (!port) { |
| dbg("%s - port == NULL", function); |
| return -1; |
| } |
| if (!port->serial) { |
| dbg("%s - port->serial == NULL", function); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /* Inline functions to check the sanity of a pointer that is passed to us */ |
| static int mos7840_serial_paranoia_check(struct usb_serial *serial, |
| const char *function) |
| { |
| if (!serial) { |
| dbg("%s - serial == NULL", function); |
| return -1; |
| } |
| if (!serial->type) { |
| dbg("%s - serial->type == NULL!", function); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, |
| const char *function) |
| { |
| /* if no port was specified, or it fails a paranoia check */ |
| if (!port || |
| mos7840_port_paranoia_check(port, function) || |
| mos7840_serial_paranoia_check(port->serial, function)) { |
| /* then say that we don't have a valid usb_serial thing, |
| * which will end up genrating -ENODEV return values */ |
| return NULL; |
| } |
| |
| return port->serial; |
| } |
| |
| /***************************************************************************** |
| * mos7840_bulk_in_callback |
| * this is the callback function for when we have received data on the |
| * bulk in endpoint. |
| *****************************************************************************/ |
| |
| static void mos7840_bulk_in_callback(struct urb *urb) |
| { |
| int retval; |
| unsigned char *data; |
| struct usb_serial *serial; |
| struct usb_serial_port *port; |
| struct moschip_port *mos7840_port; |
| struct tty_struct *tty; |
| int status = urb->status; |
| |
| if (status) { |
| dbg("nonzero read bulk status received: %d", status); |
| return; |
| } |
| |
| mos7840_port = urb->context; |
| if (!mos7840_port) { |
| dbg("%s", "NULL mos7840_port pointer \n"); |
| return; |
| } |
| |
| port = (struct usb_serial_port *)mos7840_port->port; |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Port Paranoia failed \n"); |
| return; |
| } |
| |
| serial = mos7840_get_usb_serial(port, __func__); |
| if (!serial) { |
| dbg("%s\n", "Bad serial pointer "); |
| return; |
| } |
| |
| dbg("%s\n", "Entering... \n"); |
| |
| data = urb->transfer_buffer; |
| |
| dbg("%s", "Entering ........... \n"); |
| |
| if (urb->actual_length) { |
| tty = tty_port_tty_get(&mos7840_port->port->port); |
| if (tty) { |
| tty_buffer_request_room(tty, urb->actual_length); |
| tty_insert_flip_string(tty, data, urb->actual_length); |
| dbg(" %s \n", data); |
| tty_flip_buffer_push(tty); |
| tty_kref_put(tty); |
| } |
| mos7840_port->icount.rx += urb->actual_length; |
| smp_wmb(); |
| dbg("mos7840_port->icount.rx is %d:\n", |
| mos7840_port->icount.rx); |
| } |
| |
| if (!mos7840_port->read_urb) { |
| dbg("%s", "URB KILLED !!!\n"); |
| return; |
| } |
| |
| |
| mos7840_port->read_urb->dev = serial->dev; |
| |
| retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
| |
| if (retval) { |
| dbg(" usb_submit_urb(read bulk) failed, retval = %d", |
| retval); |
| } |
| } |
| |
| /***************************************************************************** |
| * mos7840_bulk_out_data_callback |
| * this is the callback function for when we have finished sending |
| * serial data on the bulk out endpoint. |
| *****************************************************************************/ |
| |
| static void mos7840_bulk_out_data_callback(struct urb *urb) |
| { |
| struct moschip_port *mos7840_port; |
| struct tty_struct *tty; |
| int status = urb->status; |
| int i; |
| |
| mos7840_port = urb->context; |
| spin_lock(&mos7840_port->pool_lock); |
| for (i = 0; i < NUM_URBS; i++) { |
| if (urb == mos7840_port->write_urb_pool[i]) { |
| mos7840_port->busy[i] = 0; |
| break; |
| } |
| } |
| spin_unlock(&mos7840_port->pool_lock); |
| |
| if (status) { |
| dbg("nonzero write bulk status received:%d\n", status); |
| return; |
| } |
| |
| if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) { |
| dbg("%s", "Port Paranoia failed \n"); |
| return; |
| } |
| |
| dbg("%s \n", "Entering ........."); |
| |
| tty = tty_port_tty_get(&mos7840_port->port->port); |
| if (tty && mos7840_port->open) |
| tty_wakeup(tty); |
| tty_kref_put(tty); |
| |
| } |
| |
| /************************************************************************/ |
| /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ |
| /************************************************************************/ |
| #ifdef MCSSerialProbe |
| static int mos7840_serial_probe(struct usb_serial *serial, |
| const struct usb_device_id *id) |
| { |
| |
| /*need to implement the mode_reg reading and updating\ |
| structures usb_serial_ device_type\ |
| (i.e num_ports, num_bulkin,bulkout etc) */ |
| /* Also we can update the changes attach */ |
| return 1; |
| } |
| #endif |
| |
| /***************************************************************************** |
| * mos7840_open |
| * 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 mos7840_open(struct tty_struct *tty, |
| struct usb_serial_port *port, struct file *filp) |
| { |
| int response; |
| int j; |
| struct usb_serial *serial; |
| struct urb *urb; |
| __u16 Data; |
| int status; |
| struct moschip_port *mos7840_port; |
| struct moschip_port *port0; |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Port Paranoia failed \n"); |
| return -ENODEV; |
| } |
| |
| serial = port->serial; |
| |
| if (mos7840_serial_paranoia_check(serial, __func__)) { |
| dbg("%s", "Serial Paranoia failed \n"); |
| return -ENODEV; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| port0 = mos7840_get_port_private(serial->port[0]); |
| |
| if (mos7840_port == NULL || port0 == NULL) |
| return -ENODEV; |
| |
| usb_clear_halt(serial->dev, port->write_urb->pipe); |
| usb_clear_halt(serial->dev, port->read_urb->pipe); |
| port0->open_ports++; |
| |
| /* Initialising the write urb pool */ |
| for (j = 0; j < NUM_URBS; ++j) { |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| mos7840_port->write_urb_pool[j] = urb; |
| |
| if (urb == NULL) { |
| err("No more urbs???"); |
| continue; |
| } |
| |
| urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, |
| GFP_KERNEL); |
| if (!urb->transfer_buffer) { |
| usb_free_urb(urb); |
| mos7840_port->write_urb_pool[j] = NULL; |
| err("%s-out of memory for urb buffers.", __func__); |
| continue; |
| } |
| } |
| |
| /***************************************************************************** |
| * Initialize MCS7840 -- Write Init values to corresponding Registers |
| * |
| * Register Index |
| * 1 : IER |
| * 2 : FCR |
| * 3 : LCR |
| * 4 : MCR |
| * |
| * 0x08 : SP1/2 Control Reg |
| *****************************************************************************/ |
| |
| /* NEED to check the following Block */ |
| |
| Data = 0x0; |
| status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
| if (status < 0) { |
| dbg("Reading Spreg failed\n"); |
| return -1; |
| } |
| Data |= 0x80; |
| status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| if (status < 0) { |
| dbg("writing Spreg failed\n"); |
| return -1; |
| } |
| |
| Data &= ~0x80; |
| status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| if (status < 0) { |
| dbg("writing Spreg failed\n"); |
| return -1; |
| } |
| /* End of block to be checked */ |
| |
| Data = 0x0; |
| status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
| &Data); |
| if (status < 0) { |
| dbg("Reading Controlreg failed\n"); |
| return -1; |
| } |
| Data |= 0x08; /* Driver done bit */ |
| Data |= 0x20; /* rx_disable */ |
| status = mos7840_set_reg_sync(port, |
| mos7840_port->ControlRegOffset, Data); |
| if (status < 0) { |
| dbg("writing Controlreg failed\n"); |
| return -1; |
| } |
| /* do register settings here */ |
| /* Set all regs to the device default values. */ |
| /*********************************** |
| * First Disable all interrupts. |
| ***********************************/ |
| Data = 0x00; |
| status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| if (status < 0) { |
| dbg("disableing interrupts failed\n"); |
| return -1; |
| } |
| /* Set FIFO_CONTROL_REGISTER to the default value */ |
| Data = 0x00; |
| status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| if (status < 0) { |
| dbg("Writing FIFO_CONTROL_REGISTER failed\n"); |
| return -1; |
| } |
| |
| Data = 0xcf; |
| status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| if (status < 0) { |
| dbg("Writing FIFO_CONTROL_REGISTER failed\n"); |
| return -1; |
| } |
| |
| Data = 0x03; |
| status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| mos7840_port->shadowLCR = Data; |
| |
| Data = 0x0b; |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| mos7840_port->shadowMCR = Data; |
| |
| Data = 0x00; |
| status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
| mos7840_port->shadowLCR = Data; |
| |
| Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
| status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| |
| Data = 0x0c; |
| status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
| |
| Data = 0x0; |
| status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
| |
| Data = 0x00; |
| status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
| |
| Data = Data & ~SERIAL_LCR_DLAB; |
| status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| mos7840_port->shadowLCR = Data; |
| |
| /* clearing Bulkin and Bulkout Fifo */ |
| Data = 0x0; |
| status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); |
| |
| Data = Data | 0x0c; |
| status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| |
| Data = Data & ~0x0c; |
| status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); |
| /* Finally enable all interrupts */ |
| Data = 0x0c; |
| status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| |
| /* clearing rx_disable */ |
| Data = 0x0; |
| status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
| &Data); |
| Data = Data & ~0x20; |
| status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
| Data); |
| |
| /* rx_negate */ |
| Data = 0x0; |
| status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, |
| &Data); |
| Data = Data | 0x10; |
| status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, |
| Data); |
| |
| /* force low_latency on so that our tty_push actually forces * |
| * the data through,otherwise it is scheduled, and with * |
| * high data rates (like with OHCI) data can get lost. */ |
| if (tty) |
| 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 * |
| * were not set up at that time.) */ |
| if (port0->open_ports == 1) { |
| if (serial->port[0]->interrupt_in_buffer == NULL) { |
| /* set up interrupt urb */ |
| usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
| serial->dev, |
| usb_rcvintpipe(serial->dev, |
| serial->port[0]->interrupt_in_endpointAddress), |
| serial->port[0]->interrupt_in_buffer, |
| serial->port[0]->interrupt_in_urb-> |
| transfer_buffer_length, |
| mos7840_interrupt_callback, |
| serial, |
| serial->port[0]->interrupt_in_urb->interval); |
| |
| /* start interrupt read for mos7840 * |
| * will continue as long as mos7840 is connected */ |
| |
| response = |
| usb_submit_urb(serial->port[0]->interrupt_in_urb, |
| GFP_KERNEL); |
| if (response) { |
| err("%s - Error %d submitting interrupt urb", |
| __func__, response); |
| } |
| |
| } |
| |
| } |
| |
| /* see if we've set up our endpoint info yet * |
| * (can't set it up in mos7840_startup as the * |
| * structures were not set up at that time.) */ |
| |
| dbg("port number is %d \n", port->number); |
| dbg("serial number is %d \n", port->serial->minor); |
| dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); |
| dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); |
| dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); |
| dbg("port's number in the device is %d\n", mos7840_port->port_num); |
| mos7840_port->read_urb = port->read_urb; |
| |
| /* set up our bulk in urb */ |
| |
| usb_fill_bulk_urb(mos7840_port->read_urb, |
| serial->dev, |
| usb_rcvbulkpipe(serial->dev, |
| port->bulk_in_endpointAddress), |
| port->bulk_in_buffer, |
| mos7840_port->read_urb->transfer_buffer_length, |
| mos7840_bulk_in_callback, mos7840_port); |
| |
| dbg("mos7840_open: bulkin endpoint is %d\n", |
| port->bulk_in_endpointAddress); |
| response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); |
| if (response) { |
| err("%s - Error %d submitting control urb", __func__, |
| response); |
| } |
| |
| /* initialize our wait queues */ |
| init_waitqueue_head(&mos7840_port->wait_chase); |
| init_waitqueue_head(&mos7840_port->delta_msr_wait); |
| |
| /* initialize our icount structure */ |
| memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); |
| |
| /* initialize our port settings */ |
| /* Must set to enable ints! */ |
| mos7840_port->shadowMCR = MCR_MASTER_IE; |
| /* send a open port command */ |
| mos7840_port->open = 1; |
| /* mos7840_change_port_settings(mos7840_port,old_termios); */ |
| mos7840_port->icount.tx = 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); |
| |
| return 0; |
| |
| } |
| |
| /***************************************************************************** |
| * mos7840_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 zero. |
| *****************************************************************************/ |
| |
| static int mos7840_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| int i; |
| int chars = 0; |
| unsigned long flags; |
| struct moschip_port *mos7840_port; |
| |
| dbg("%s \n", " mos7840_chars_in_buffer:entering ..........."); |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return 0; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| if (mos7840_port == NULL) { |
| dbg("%s \n", "mos7840_break:leaving ..........."); |
| return 0; |
| } |
| |
| spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
| for (i = 0; i < NUM_URBS; ++i) |
| if (mos7840_port->busy[i]) |
| chars += URB_TRANSFER_BUFFER_SIZE; |
| spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
| dbg("%s - returns %d", __func__, chars); |
| return chars; |
| |
| } |
| |
| /************************************************************************ |
| * |
| * mos7840_block_until_tx_empty |
| * |
| * This function will block the close until one of the following: |
| * 1. TX count are 0 |
| * 2. The mos7840 has stopped |
| * 3. A timeout of 3 seconds without activity has expired |
| * |
| ************************************************************************/ |
| static void mos7840_block_until_tx_empty(struct tty_struct *tty, |
| struct moschip_port *mos7840_port) |
| { |
| int timeout = HZ / 10; |
| int wait = 30; |
| int count; |
| |
| while (1) { |
| |
| count = mos7840_chars_in_buffer(tty); |
| |
| /* Check for Buffer status */ |
| if (count <= 0) |
| return; |
| |
| /* Block the thread for a while */ |
| interruptible_sleep_on_timeout(&mos7840_port->wait_chase, |
| timeout); |
| |
| /* No activity.. count down section */ |
| wait--; |
| if (wait == 0) { |
| dbg("%s - TIMEOUT", __func__); |
| return; |
| } else { |
| /* Reset timeout value back to seconds */ |
| wait = 30; |
| } |
| } |
| } |
| |
| /***************************************************************************** |
| * mos7840_close |
| * this function is called by the tty driver when a port is closed |
| *****************************************************************************/ |
| |
| static void mos7840_close(struct tty_struct *tty, |
| struct usb_serial_port *port, struct file *filp) |
| { |
| struct usb_serial *serial; |
| struct moschip_port *mos7840_port; |
| struct moschip_port *port0; |
| int j; |
| __u16 Data; |
| |
| dbg("%s\n", "mos7840_close:entering..."); |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Port Paranoia failed \n"); |
| return; |
| } |
| |
| serial = mos7840_get_usb_serial(port, __func__); |
| if (!serial) { |
| dbg("%s", "Serial Paranoia failed \n"); |
| return; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| port0 = mos7840_get_port_private(serial->port[0]); |
| |
| if (mos7840_port == NULL || port0 == NULL) |
| return; |
| |
| for (j = 0; j < NUM_URBS; ++j) |
| usb_kill_urb(mos7840_port->write_urb_pool[j]); |
| |
| /* Freeing Write URBs */ |
| for (j = 0; j < NUM_URBS; ++j) { |
| if (mos7840_port->write_urb_pool[j]) { |
| if (mos7840_port->write_urb_pool[j]->transfer_buffer) |
| kfree(mos7840_port->write_urb_pool[j]-> |
| transfer_buffer); |
| |
| usb_free_urb(mos7840_port->write_urb_pool[j]); |
| } |
| } |
| |
| if (serial->dev) |
| /* flush and block until tx is empty */ |
| mos7840_block_until_tx_empty(tty, mos7840_port); |
| |
| /* While closing port, shutdown all bulk read, write * |
| * and interrupt read if they exists */ |
| if (serial->dev) { |
| if (mos7840_port->write_urb) { |
| dbg("%s", "Shutdown bulk write\n"); |
| usb_kill_urb(mos7840_port->write_urb); |
| } |
| if (mos7840_port->read_urb) { |
| dbg("%s", "Shutdown bulk read\n"); |
| usb_kill_urb(mos7840_port->read_urb); |
| } |
| if ((&mos7840_port->control_urb)) { |
| dbg("%s", "Shutdown control read\n"); |
| /*/ usb_kill_urb (mos7840_port->control_urb); */ |
| } |
| } |
| /* if(mos7840_port->ctrl_buf != NULL) */ |
| /* kfree(mos7840_port->ctrl_buf); */ |
| port0->open_ports--; |
| dbg("mos7840_num_open_ports in close%d:in port%d\n", |
| port0->open_ports, port->number); |
| if (port0->open_ports == 0) { |
| if (serial->port[0]->interrupt_in_urb) { |
| dbg("%s", "Shutdown interrupt_in_urb\n"); |
| usb_kill_urb(serial->port[0]->interrupt_in_urb); |
| } |
| } |
| |
| if (mos7840_port->write_urb) { |
| /* if this urb had a transfer buffer already (old tx) free it */ |
| if (mos7840_port->write_urb->transfer_buffer != NULL) |
| kfree(mos7840_port->write_urb->transfer_buffer); |
| usb_free_urb(mos7840_port->write_urb); |
| } |
| |
| Data = 0x0; |
| mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| |
| Data = 0x00; |
| mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| |
| mos7840_port->open = 0; |
| |
| dbg("%s \n", "Leaving ............"); |
| } |
| |
| /************************************************************************ |
| * |
| * mos7840_block_until_chase_response |
| * |
| * This function will block the close until one of the following: |
| * 1. Response to our Chase comes from mos7840 |
| * 2. A timeout of 10 seconds without activity has expired |
| * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) |
| * |
| ************************************************************************/ |
| |
| static void mos7840_block_until_chase_response(struct tty_struct *tty, |
| struct moschip_port *mos7840_port) |
| { |
| int timeout = 1 * HZ; |
| int wait = 10; |
| int count; |
| |
| while (1) { |
| count = mos7840_chars_in_buffer(tty); |
| |
| /* Check for Buffer status */ |
| if (count <= 0) |
| return; |
| |
| /* Block the thread for a while */ |
| interruptible_sleep_on_timeout(&mos7840_port->wait_chase, |
| timeout); |
| /* No activity.. count down section */ |
| wait--; |
| if (wait == 0) { |
| dbg("%s - TIMEOUT", __func__); |
| return; |
| } else { |
| /* Reset timeout value back to seconds */ |
| wait = 10; |
| } |
| } |
| |
| } |
| |
| /***************************************************************************** |
| * mos7840_break |
| * this function sends a break to the port |
| *****************************************************************************/ |
| static void mos7840_break(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| unsigned char data; |
| struct usb_serial *serial; |
| struct moschip_port *mos7840_port; |
| |
| dbg("%s \n", "Entering ..........."); |
| dbg("mos7840_break: Start\n"); |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Port Paranoia failed \n"); |
| return; |
| } |
| |
| serial = mos7840_get_usb_serial(port, __func__); |
| if (!serial) { |
| dbg("%s", "Serial Paranoia failed \n"); |
| return; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| |
| if (mos7840_port == NULL) |
| return; |
| |
| if (serial->dev) |
| /* flush and block until tx is empty */ |
| mos7840_block_until_chase_response(tty, mos7840_port); |
| |
| if (break_state == -1) |
| data = mos7840_port->shadowLCR | LCR_SET_BREAK; |
| else |
| data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; |
| |
| mos7840_port->shadowLCR = data; |
| dbg("mcs7840_break mos7840_port->shadowLCR is %x\n", |
| mos7840_port->shadowLCR); |
| mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, |
| mos7840_port->shadowLCR); |
| |
| return; |
| } |
| |
| /***************************************************************************** |
| * mos7840_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 |
| * Otherwise we return a negative error number. |
| *****************************************************************************/ |
| |
| static int mos7840_write_room(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| int i; |
| int room = 0; |
| unsigned long flags; |
| struct moschip_port *mos7840_port; |
| |
| dbg("%s \n", " mos7840_write_room:entering ..........."); |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| dbg("%s \n", " mos7840_write_room:leaving ..........."); |
| return -1; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| if (mos7840_port == NULL) { |
| dbg("%s \n", "mos7840_break:leaving ..........."); |
| return -1; |
| } |
| |
| spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
| for (i = 0; i < NUM_URBS; ++i) { |
| if (!mos7840_port->busy[i]) |
| room += URB_TRANSFER_BUFFER_SIZE; |
| } |
| spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
| |
| room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; |
| dbg("%s - returns %d", __func__, room); |
| return room; |
| |
| } |
| |
| /***************************************************************************** |
| * mos7840_write |
| * 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 mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, |
| const unsigned char *data, int count) |
| { |
| int status; |
| int i; |
| int bytes_sent = 0; |
| int transfer_size; |
| unsigned long flags; |
| |
| struct moschip_port *mos7840_port; |
| struct usb_serial *serial; |
| struct urb *urb; |
| /* __u16 Data; */ |
| const unsigned char *current_position = data; |
| unsigned char *data1; |
| dbg("%s \n", "entering ..........."); |
| /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", |
| mos7840_port->shadowLCR); */ |
| |
| #ifdef NOTMOS7840 |
| Data = 0x00; |
| status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); |
| mos7840_port->shadowLCR = Data; |
| dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data); |
| dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", |
| mos7840_port->shadowLCR); |
| |
| /* Data = 0x03; */ |
| /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ |
| /* mos7840_port->shadowLCR=Data;//Need to add later */ |
| |
| Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ |
| status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| |
| /* Data = 0x0c; */ |
| /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ |
| Data = 0x00; |
| status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); |
| dbg("mos7840_write:DLL value is %x\n", Data); |
| |
| Data = 0x0; |
| status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); |
| dbg("mos7840_write:DLM value is %x\n", Data); |
| |
| Data = Data & ~SERIAL_LCR_DLAB; |
| dbg("mos7840_write: mos7840_port->shadowLCR is %x\n", |
| mos7840_port->shadowLCR); |
| status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| #endif |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Port Paranoia failed \n"); |
| return -1; |
| } |
| |
| serial = port->serial; |
| if (mos7840_serial_paranoia_check(serial, __func__)) { |
| dbg("%s", "Serial Paranoia failed \n"); |
| return -1; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| if (mos7840_port == NULL) { |
| dbg("%s", "mos7840_port is NULL\n"); |
| return -1; |
| } |
| |
| /* try to find a free urb in the list */ |
| urb = NULL; |
| |
| spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
| for (i = 0; i < NUM_URBS; ++i) { |
| if (!mos7840_port->busy[i]) { |
| mos7840_port->busy[i] = 1; |
| urb = mos7840_port->write_urb_pool[i]; |
| dbg("\nURB:%d", i); |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
| |
| if (urb == NULL) { |
| dbg("%s - no more free urbs", __func__); |
| goto exit; |
| } |
| |
| if (urb->transfer_buffer == NULL) { |
| urb->transfer_buffer = |
| kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); |
| |
| if (urb->transfer_buffer == NULL) { |
| err("%s no more kernel memory...", __func__); |
| goto exit; |
| } |
| } |
| transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); |
| |
| memcpy(urb->transfer_buffer, current_position, transfer_size); |
| |
| /* fill urb with data and submit */ |
| usb_fill_bulk_urb(urb, |
| serial->dev, |
| usb_sndbulkpipe(serial->dev, |
| port->bulk_out_endpointAddress), |
| urb->transfer_buffer, |
| transfer_size, |
| mos7840_bulk_out_data_callback, mos7840_port); |
| |
| data1 = urb->transfer_buffer; |
| dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress); |
| |
| /* send it down the pipe */ |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| |
| if (status) { |
| mos7840_port->busy[i] = 0; |
| err("%s - usb_submit_urb(write bulk) failed with status = %d", |
| __func__, status); |
| bytes_sent = status; |
| goto exit; |
| } |
| bytes_sent = transfer_size; |
| mos7840_port->icount.tx += transfer_size; |
| smp_wmb(); |
| dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); |
| exit: |
| return bytes_sent; |
| |
| } |
| |
| /***************************************************************************** |
| * mos7840_throttle |
| * this function is called by the tty driver when it wants to stop the data |
| * being read from the port. |
| *****************************************************************************/ |
| |
| static void mos7840_throttle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7840_port; |
| int status; |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return; |
| } |
| |
| dbg("- port %d\n", port->number); |
| |
| mos7840_port = mos7840_get_port_private(port); |
| |
| if (mos7840_port == NULL) |
| return; |
| |
| if (!mos7840_port->open) { |
| dbg("%s\n", "port not opened"); |
| return; |
| } |
| |
| dbg("%s", "Entering .......... \n"); |
| |
| /* if we are implementing XON/XOFF, send the stop character */ |
| if (I_IXOFF(tty)) { |
| unsigned char stop_char = STOP_CHAR(tty); |
| status = mos7840_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) { |
| mos7840_port->shadowMCR &= ~MCR_RTS; |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
| mos7840_port->shadowMCR); |
| if (status < 0) |
| return; |
| } |
| |
| return; |
| } |
| |
| /***************************************************************************** |
| * mos7840_unthrottle |
| * this function is called by the tty driver when it wants to resume |
| * the data being read from the port (called after mos7840_throttle is |
| * called) |
| *****************************************************************************/ |
| static void mos7840_unthrottle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| int status; |
| struct moschip_port *mos7840_port = mos7840_get_port_private(port); |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return; |
| } |
| |
| if (mos7840_port == NULL) |
| return; |
| |
| if (!mos7840_port->open) { |
| dbg("%s - port not opened", __func__); |
| return; |
| } |
| |
| dbg("%s", "Entering .......... \n"); |
| |
| /* if we are implementing XON/XOFF, send the start character */ |
| if (I_IXOFF(tty)) { |
| unsigned char start_char = START_CHAR(tty); |
| status = mos7840_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) { |
| mos7840_port->shadowMCR |= MCR_RTS; |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
| mos7840_port->shadowMCR); |
| if (status < 0) |
| return; |
| } |
| } |
| |
| static int mos7840_tiocmget(struct tty_struct *tty, struct file *file) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7840_port; |
| unsigned int result; |
| __u16 msr; |
| __u16 mcr; |
| int status; |
| mos7840_port = mos7840_get_port_private(port); |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (mos7840_port == NULL) |
| return -ENODEV; |
| |
| status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); |
| status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); |
| result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) |
| | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) |
| | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) |
| | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) |
| | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) |
| | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) |
| | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); |
| |
| dbg("%s - 0x%04X", __func__, result); |
| |
| return result; |
| } |
| |
| static int mos7840_tiocmset(struct tty_struct *tty, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct moschip_port *mos7840_port; |
| unsigned int mcr; |
| int status; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| mos7840_port = mos7840_get_port_private(port); |
| |
| if (mos7840_port == NULL) |
| return -ENODEV; |
| |
| /* FIXME: What locks the port registers ? */ |
| mcr = mos7840_port->shadowMCR; |
| if (clear & TIOCM_RTS) |
| mcr &= ~MCR_RTS; |
| if (clear & TIOCM_DTR) |
| mcr &= ~MCR_DTR; |
| if (clear & TIOCM_LOOP) |
| mcr &= ~MCR_LOOPBACK; |
| |
| if (set & TIOCM_RTS) |
| mcr |= MCR_RTS; |
| if (set & TIOCM_DTR) |
| mcr |= MCR_DTR; |
| if (set & TIOCM_LOOP) |
| mcr |= MCR_LOOPBACK; |
| |
| mos7840_port->shadowMCR = mcr; |
| |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); |
| if (status < 0) { |
| dbg("setting MODEM_CONTROL_REGISTER Failed\n"); |
| return status; |
| } |
| |
| return 0; |
| } |
| |
| /***************************************************************************** |
| * mos7840_calc_baud_rate_divisor |
| * this function calculates the proper baud rate divisor for the specified |
| * baud rate. |
| *****************************************************************************/ |
| static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor, |
| __u16 *clk_sel_val) |
| { |
| |
| dbg("%s - %d", __func__, baudRate); |
| |
| if (baudRate <= 115200) { |
| *divisor = 115200 / baudRate; |
| *clk_sel_val = 0x0; |
| } |
| if ((baudRate > 115200) && (baudRate <= 230400)) { |
| *divisor = 230400 / baudRate; |
| *clk_sel_val = 0x10; |
| } else if ((baudRate > 230400) && (baudRate <= 403200)) { |
| *divisor = 403200 / baudRate; |
| *clk_sel_val = 0x20; |
| } else if ((baudRate > 403200) && (baudRate <= 460800)) { |
| *divisor = 460800 / baudRate; |
| *clk_sel_val = 0x30; |
| } else if ((baudRate > 460800) && (baudRate <= 806400)) { |
| *divisor = 806400 / baudRate; |
| *clk_sel_val = 0x40; |
| } else if ((baudRate > 806400) && (baudRate <= 921600)) { |
| *divisor = 921600 / baudRate; |
| *clk_sel_val = 0x50; |
| } else if ((baudRate > 921600) && (baudRate <= 1572864)) { |
| *divisor = 1572864 / baudRate; |
| *clk_sel_val = 0x60; |
| } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { |
| *divisor = 3145728 / baudRate; |
| *clk_sel_val = 0x70; |
| } |
| return 0; |
| |
| #ifdef NOTMCS7840 |
| |
| for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { |
| if (mos7840_divisor_table[i].BaudRate == baudrate) { |
| *divisor = mos7840_divisor_table[i].Divisor; |
| return 0; |
| } |
| } |
| |
| /* After trying for all the standard baud rates * |
| * Try calculating the divisor for this baud rate */ |
| |
| if (baudrate > 75 && baudrate < 230400) { |
| /* get the divisor */ |
| custom = (__u16) (230400L / baudrate); |
| |
| /* Check for round off */ |
| round1 = (__u16) (2304000L / baudrate); |
| round = (__u16) (round1 - (custom * 10)); |
| if (round > 4) |
| custom++; |
| *divisor = custom; |
| |
| dbg(" Baud %d = %d\n", baudrate, custom); |
| return 0; |
| } |
| |
| dbg("%s\n", " Baud calculation Failed..."); |
| return -1; |
| #endif |
| } |
| |
| /***************************************************************************** |
| * mos7840_send_cmd_write_baud_rate |
| * this function sends the proper command to change the baud rate of the |
| * specified port. |
| *****************************************************************************/ |
| |
| static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, |
| int baudRate) |
| { |
| int divisor = 0; |
| int status; |
| __u16 Data; |
| unsigned char number; |
| __u16 clk_sel_val; |
| struct usb_serial_port *port; |
| |
| if (mos7840_port == NULL) |
| return -1; |
| |
| port = (struct usb_serial_port *)mos7840_port->port; |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return -1; |
| } |
| |
| if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
| dbg("%s", "Invalid Serial \n"); |
| return -1; |
| } |
| |
| dbg("%s", "Entering .......... \n"); |
| |
| number = mos7840_port->port->number - mos7840_port->port->serial->minor; |
| |
| dbg("%s - port = %d, baud = %d", __func__, |
| mos7840_port->port->number, baudRate); |
| /* reset clk_uart_sel in spregOffset */ |
| if (baudRate > 115200) { |
| #ifdef HW_flow_control |
| /* NOTE: need to see the pther register to modify */ |
| /* setting h/w flow control bit to 1 */ |
| Data = 0x2b; |
| mos7840_port->shadowMCR = Data; |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
| Data); |
| if (status < 0) { |
| dbg("Writing spreg failed in set_serial_baud\n"); |
| return -1; |
| } |
| #endif |
| |
| } else { |
| #ifdef HW_flow_control |
| / *setting h/w flow control bit to 0 */ |
| Data = 0xb; |
| mos7840_port->shadowMCR = Data; |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, |
| Data); |
| if (status < 0) { |
| dbg("Writing spreg failed in set_serial_baud\n"); |
| return -1; |
| } |
| #endif |
| |
| } |
| |
| if (1) { /* baudRate <= 115200) */ |
| clk_sel_val = 0x0; |
| Data = 0x0; |
| status = mos7840_calc_baud_rate_divisor(baudRate, &divisor, |
| &clk_sel_val); |
| status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, |
| &Data); |
| if (status < 0) { |
| dbg("reading spreg failed in set_serial_baud\n"); |
| return -1; |
| } |
| Data = (Data & 0x8f) | clk_sel_val; |
| status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, |
| Data); |
| if (status < 0) { |
| dbg("Writing spreg failed in set_serial_baud\n"); |
| return -1; |
| } |
| /* Calculate the Divisor */ |
| |
| if (status) { |
| err("%s - bad baud rate", __func__); |
| dbg("%s\n", "bad baud rate"); |
| return status; |
| } |
| /* Enable access to divisor latch */ |
| Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; |
| mos7840_port->shadowLCR = Data; |
| mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| |
| /* Write the divisor */ |
| Data = (unsigned char)(divisor & 0xff); |
| dbg("set_serial_baud Value to write DLL is %x\n", Data); |
| mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); |
| |
| Data = (unsigned char)((divisor & 0xff00) >> 8); |
| dbg("set_serial_baud Value to write DLM is %x\n", Data); |
| mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); |
| |
| /* Disable access to divisor latch */ |
| Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; |
| mos7840_port->shadowLCR = Data; |
| mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| |
| } |
| return status; |
| } |
| |
| /***************************************************************************** |
| * mos7840_change_port_settings |
| * This routine is called to set the UART on the device to match |
| * the specified new settings. |
| *****************************************************************************/ |
| |
| static void mos7840_change_port_settings(struct tty_struct *tty, |
| struct moschip_port *mos7840_port, struct ktermios *old_termios) |
| { |
| int baud; |
| unsigned cflag; |
| unsigned iflag; |
| __u8 lData; |
| __u8 lParity; |
| __u8 lStop; |
| int status; |
| __u16 Data; |
| struct usb_serial_port *port; |
| struct usb_serial *serial; |
| |
| if (mos7840_port == NULL) |
| return; |
| |
| port = (struct usb_serial_port *)mos7840_port->port; |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return; |
| } |
| |
| if (mos7840_serial_paranoia_check(port->serial, __func__)) { |
| dbg("%s", "Invalid Serial \n"); |
| return; |
| } |
| |
| serial = port->serial; |
| |
| dbg("%s - port %d", __func__, mos7840_port->port->number); |
| |
| if (!mos7840_port->open) { |
| dbg("%s - port not opened", __func__); |
| return; |
| } |
| |
| dbg("%s", "Entering .......... \n"); |
| |
| lData = LCR_BITS_8; |
| lStop = LCR_STOP_1; |
| lParity = LCR_PAR_NONE; |
| |
| cflag = tty->termios->c_cflag; |
| iflag = tty->termios->c_iflag; |
| |
| /* Change the number of bits */ |
| if (cflag & CSIZE) { |
| switch (cflag & CSIZE) { |
| case CS5: |
| lData = LCR_BITS_5; |
| break; |
| |
| case CS6: |
| lData = LCR_BITS_6; |
| break; |
| |
| case CS7: |
| lData = LCR_BITS_7; |
| break; |
| default: |
| case CS8: |
| lData = LCR_BITS_8; |
| break; |
| } |
| } |
| /* Change the Parity bit */ |
| if (cflag & PARENB) { |
| 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 & CMSPAR) |
| lParity = lParity | 0x20; |
| |
| /* Change the Stop bit */ |
| if (cflag & CSTOPB) { |
| lStop = LCR_STOP_2; |
| dbg("%s - stop bits = 2", __func__); |
| } else { |
| lStop = LCR_STOP_1; |
| dbg("%s - stop bits = 1", __func__); |
| } |
| |
| /* Update the LCR with the correct value */ |
| mos7840_port->shadowLCR &= |
| ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
| mos7840_port->shadowLCR |= (lData | lParity | lStop); |
| |
| dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n", |
| mos7840_port->shadowLCR); |
| /* Disable Interrupts */ |
| Data = 0x00; |
| mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| |
| Data = 0x00; |
| mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| |
| Data = 0xcf; |
| mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); |
| |
| /* Send the updated LCR value to the mos7840 */ |
| Data = mos7840_port->shadowLCR; |
| |
| mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); |
| |
| Data = 0x00b; |
| mos7840_port->shadowMCR = Data; |
| mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| Data = 0x00b; |
| mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| |
| /* set up the MCR register and send it to the mos7840 */ |
| |
| mos7840_port->shadowMCR = MCR_MASTER_IE; |
| if (cflag & CBAUD) |
| mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
| |
| if (cflag & CRTSCTS) |
| mos7840_port->shadowMCR |= (MCR_XON_ANY); |
| else |
| mos7840_port->shadowMCR &= ~(MCR_XON_ANY); |
| |
| Data = mos7840_port->shadowMCR; |
| mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| |
| /* Determine divisor based on baud rate */ |
| baud = tty_get_baud_rate(tty); |
| |
| if (!baud) { |
| /* pick a default, any default... */ |
| dbg("%s\n", "Picked default baud..."); |
| baud = 9600; |
| } |
| |
| dbg("%s - baud rate = %d", __func__, baud); |
| status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); |
| |
| /* Enable Interrupts */ |
| Data = 0x0c; |
| mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); |
| |
| if (mos7840_port->read_urb->status != -EINPROGRESS) { |
| mos7840_port->read_urb->dev = serial->dev; |
| |
| status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
| |
| if (status) { |
| dbg(" usb_submit_urb(read bulk) failed, status = %d", |
| status); |
| } |
| } |
| wake_up(&mos7840_port->delta_msr_wait); |
| mos7840_port->delta_msr_cond = 1; |
| dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n", |
| mos7840_port->shadowLCR); |
| |
| return; |
| } |
| |
| /***************************************************************************** |
| * mos7840_set_termios |
| * this function is called by the tty driver when it wants to change |
| * the termios structure |
| *****************************************************************************/ |
| |
| static void mos7840_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, |
| struct ktermios *old_termios) |
| { |
| int status; |
| unsigned int cflag; |
| struct usb_serial *serial; |
| struct moschip_port *mos7840_port; |
| dbg("mos7840_set_termios: START\n"); |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return; |
| } |
| |
| serial = port->serial; |
| |
| if (mos7840_serial_paranoia_check(serial, __func__)) { |
| dbg("%s", "Invalid Serial \n"); |
| return; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| |
| if (mos7840_port == NULL) |
| return; |
| |
| if (!mos7840_port->open) { |
| dbg("%s - port not opened", __func__); |
| return; |
| } |
| |
| dbg("%s\n", "setting termios - "); |
| |
| cflag = tty->termios->c_cflag; |
| |
| dbg("%s - clfag %08x iflag %08x", __func__, |
| tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); |
| dbg("%s - old clfag %08x old iflag %08x", __func__, |
| old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); |
| dbg("%s - port %d", __func__, port->number); |
| |
| /* change the port settings to the new ones specified */ |
| |
| mos7840_change_port_settings(tty, mos7840_port, old_termios); |
| |
| if (!mos7840_port->read_urb) { |
| dbg("%s", "URB KILLED !!!!!\n"); |
| return; |
| } |
| |
| if (mos7840_port->read_urb->status != -EINPROGRESS) { |
| mos7840_port->read_urb->dev = serial->dev; |
| status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); |
| if (status) { |
| dbg(" usb_submit_urb(read bulk) failed, status = %d", |
| status); |
| } |
| } |
| return; |
| } |
| |
| /***************************************************************************** |
| * mos7840_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 mos7840_get_lsr_info(struct tty_struct *tty, |
| unsigned int __user *value) |
| { |
| int count; |
| unsigned int result = 0; |
| |
| count = mos7840_chars_in_buffer(tty); |
| if (count == 0) { |
| dbg("%s -- Empty", __func__); |
| result = TIOCSER_TEMT; |
| } |
| |
| if (copy_to_user(value, &result, sizeof(int))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /***************************************************************************** |
| * mos7840_set_modem_info |
| * function to set modem info |
| *****************************************************************************/ |
| |
| /* FIXME: Should be using the model control hooks */ |
| |
| static int mos7840_set_modem_info(struct moschip_port *mos7840_port, |
| unsigned int cmd, unsigned int __user *value) |
| { |
| unsigned int mcr; |
| unsigned int arg; |
| __u16 Data; |
| int status; |
| struct usb_serial_port *port; |
| |
| if (mos7840_port == NULL) |
| return -1; |
| |
| port = (struct usb_serial_port *)mos7840_port->port; |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return -1; |
| } |
| |
| mcr = mos7840_port->shadowMCR; |
| |
| if (copy_from_user(&arg, value, sizeof(int))) |
| return -EFAULT; |
| |
| switch (cmd) { |
| case TIOCMBIS: |
| if (arg & TIOCM_RTS) |
| mcr |= MCR_RTS; |
| if (arg & TIOCM_DTR) |
| mcr |= MCR_RTS; |
| if (arg & TIOCM_LOOP) |
| mcr |= MCR_LOOPBACK; |
| break; |
| |
| case TIOCMBIC: |
| if (arg & TIOCM_RTS) |
| mcr &= ~MCR_RTS; |
| if (arg & TIOCM_DTR) |
| mcr &= ~MCR_RTS; |
| if (arg & TIOCM_LOOP) |
| mcr &= ~MCR_LOOPBACK; |
| break; |
| |
| case TIOCMSET: |
| /* turn off the RTS and DTR and LOOPBACK |
| * and then only turn on what was asked to */ |
| mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK); |
| mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0); |
| mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0); |
| mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0); |
| break; |
| } |
| |
| mos7840_port->shadowMCR = mcr; |
| |
| Data = mos7840_port->shadowMCR; |
| status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); |
| if (status < 0) { |
| dbg("setting MODEM_CONTROL_REGISTER Failed\n"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /***************************************************************************** |
| * mos7840_get_modem_info |
| * function to get modem info |
| *****************************************************************************/ |
| |
| static int mos7840_get_modem_info(struct moschip_port *mos7840_port, |
| unsigned int __user *value) |
| { |
| unsigned int result = 0; |
| __u16 msr; |
| unsigned int mcr = mos7840_port->shadowMCR; |
| mos7840_get_uart_reg(mos7840_port->port, |
| MODEM_STATUS_REGISTER, &msr); |
| result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */ |
| |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */ |
| |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */ |
| |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */ |
| |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */ |
| |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */ |
| |
| dbg("%s -- %x", __func__, result); |
| |
| if (copy_to_user(value, &result, sizeof(int))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /***************************************************************************** |
| * mos7840_get_serial_info |
| * function to get information about serial port |
| *****************************************************************************/ |
| |
| static int mos7840_get_serial_info(struct moschip_port *mos7840_port, |
| struct serial_struct __user *retinfo) |
| { |
| struct serial_struct tmp; |
| |
| if (mos7840_port == NULL) |
| return -1; |
| |
| if (!retinfo) |
| return -EFAULT; |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| tmp.type = PORT_16550A; |
| tmp.line = mos7840_port->port->serial->minor; |
| tmp.port = mos7840_port->port->number; |
| tmp.irq = 0; |
| tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; |
| 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 mos7840_ioctl(struct tty_struct *tty, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| void __user *argp = (void __user *)arg; |
| struct moschip_port *mos7840_port; |
| |
| struct async_icount cnow; |
| struct async_icount cprev; |
| struct serial_icounter_struct icount; |
| int mosret = 0; |
| |
| if (mos7840_port_paranoia_check(port, __func__)) { |
| dbg("%s", "Invalid port \n"); |
| return -1; |
| } |
| |
| mos7840_port = mos7840_get_port_private(port); |
| |
| if (mos7840_port == NULL) |
| return -1; |
| |
| dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); |
| |
| switch (cmd) { |
| /* return number of bytes available */ |
| |
| case TIOCSERGETLSR: |
| dbg("%s (%d) TIOCSERGETLSR", __func__, port->number); |
| return mos7840_get_lsr_info(tty, argp); |
| return 0; |
| |
| /* FIXME: use the modem hooks and remove this */ |
| case TIOCMBIS: |
| case TIOCMBIC: |
| case TIOCMSET: |
| dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__, |
| port->number); |
| mosret = |
| mos7840_set_modem_info(mos7840_port, cmd, argp); |
| return mosret; |
| |
| case TIOCMGET: |
| dbg("%s (%d) TIOCMGET", __func__, port->number); |
| return mos7840_get_modem_info(mos7840_port, argp); |
| |
| case TIOCGSERIAL: |
| dbg("%s (%d) TIOCGSERIAL", __func__, port->number); |
| return mos7840_get_serial_info(mos7840_port, argp); |
| |
| case TIOCSSERIAL: |
| dbg("%s (%d) TIOCSSERIAL", __func__, port->number); |
| break; |
| |
| case TIOCMIWAIT: |
| dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
| cprev = mos7840_port->icount; |
| while (1) { |
| /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ |
| mos7840_port->delta_msr_cond = 0; |
| wait_event_interruptible(mos7840_port->delta_msr_wait, |
| (mos7840_port-> |
| delta_msr_cond == 1)); |
| |
| /* see if a signal did it */ |
| if (signal_pending(current)) |
| return -ERESTARTSYS; |
| cnow = mos7840_port->icount; |
| smp_rmb(); |
| 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 = mos7840_port->icount; |
| smp_rmb(); |
| 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(argp, &icount, sizeof(icount))) |
| return -EFAULT; |
| return 0; |
| default: |
| break; |
| } |
| return -ENOIOCTLCMD; |
| } |
| |
| static int mos7840_calc_num_ports(struct usb_serial *serial) |
| { |
| int mos7840_num_ports = 0; |
| |
| dbg("numberofendpoints: %d \n", |
| (int)serial->interface->cur_altsetting->desc.bNumEndpoints); |
| dbg("numberofendpoints: %d \n", |
| (int)serial->interface->altsetting->desc.bNumEndpoints); |
| if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) { |
| mos7840_num_ports = serial->num_ports = 2; |
| } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) { |
| serial->num_bulk_in = 4; |
| serial->num_bulk_out = 4; |
| mos7840_num_ports = serial->num_ports = 4; |
| } |
| |
| return mos7840_num_ports; |
| } |
| |
| /**************************************************************************** |
| * mos7840_startup |
| ****************************************************************************/ |
| |
| static int mos7840_startup(struct usb_serial *serial) |
| { |
| struct moschip_port *mos7840_port; |
| struct usb_device *dev; |
| int i, status; |
| |
| __u16 Data; |
| dbg("%s \n", " mos7840_startup :entering.........."); |
| |
| if (!serial) { |
| dbg("%s\n", "Invalid Handler"); |
| return -1; |
| } |
| |
| dev = serial->dev; |
| |
| dbg("%s\n", "Entering..."); |
| |
| /* we set up the pointers to the endpoints in the mos7840_open * |
| * function, as the structures aren't created yet. */ |
| |
| /* set up port private structures */ |
| for (i = 0; i < serial->num_ports; ++i) { |
| mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); |
| if (mos7840_port == NULL) { |
| err("%s - Out of memory", __func__); |
| status = -ENOMEM; |
| i--; /* don't follow NULL pointer cleaning up */ |
| goto error; |
| } |
| |
| /* Initialize all port interrupt end point to port 0 int |
| * endpoint. Our device has only one interrupt end point |
| * common to all port */ |
| |
| mos7840_port->port = serial->port[i]; |
| mos7840_set_port_private(serial->port[i], mos7840_port); |
| spin_lock_init(&mos7840_port->pool_lock); |
| |
| mos7840_port->port_num = ((serial->port[i]->number - |
| (serial->port[i]->serial->minor)) + |
| 1); |
| |
| if (mos7840_port->port_num == 1) { |
| mos7840_port->SpRegOffset = 0x0; |
| mos7840_port->ControlRegOffset = 0x1; |
| mos7840_port->DcrRegOffset = 0x4; |
| } else if ((mos7840_port->port_num == 2) |
| && (serial->num_ports == 4)) { |
| mos7840_port->SpRegOffset = 0x8; |
| mos7840_port->ControlRegOffset = 0x9; |
| mos7840_port->DcrRegOffset = 0x16; |
| } else if ((mos7840_port->port_num == 2) |
| && (serial->num_ports == 2)) { |
| mos7840_port->SpRegOffset = 0xa; |
| mos7840_port->ControlRegOffset = 0xb; |
| mos7840_port->DcrRegOffset = 0x19; |
| } else if ((mos7840_port->port_num == 3) |
| && (serial->num_ports == 4)) { |
| mos7840_port->SpRegOffset = 0xa; |
| mos7840_port->ControlRegOffset = 0xb; |
| mos7840_port->DcrRegOffset = 0x19; |
| } else if ((mos7840_port->port_num == 4) |
| && (serial->num_ports == 4)) { |
| mos7840_port->SpRegOffset = 0xc; |
| mos7840_port->ControlRegOffset = 0xd; |
| mos7840_port->DcrRegOffset = 0x1c; |
| } |
| mos7840_dump_serial_port(mos7840_port); |
| mos7840_set_port_private(serial->port[i], mos7840_port); |
| |
| /* enable rx_disable bit in control register */ |
| status = mos7840_get_reg_sync(serial->port[i], |
| mos7840_port->ControlRegOffset, &Data); |
| if (status < 0) { |
| dbg("Reading ControlReg failed status-0x%x\n", status); |
| break; |
| } else |
| dbg("ControlReg Reading success val is %x, status%d\n", |
| Data, status); |
| Data |= 0x08; /* setting driver done bit */ |
| Data |= 0x04; /* sp1_bit to have cts change reflect in |
| modem status reg */ |
| |
| /* Data |= 0x20; //rx_disable bit */ |
| status = mos7840_set_reg_sync(serial->port[i], |
| mos7840_port->ControlRegOffset, Data); |
| if (status < 0) { |
| dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status); |
| break; |
| } else |
| dbg("ControlReg Writing success(rx_disable) status%d\n", |
| status); |
| |
| /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 |
| and 0x24 in DCR3 */ |
| Data = 0x01; |
| status = mos7840_set_reg_sync(serial->port[i], |
| (__u16) (mos7840_port->DcrRegOffset + 0), Data); |
| if (status < 0) { |
| dbg("Writing DCR0 failed status-0x%x\n", status); |
| break; |
| } else |
| dbg("DCR0 Writing success status%d\n", status); |
| |
| Data = 0x05; |
| status = mos7840_set_reg_sync(serial->port[i], |
| (__u16) (mos7840_port->DcrRegOffset + 1), Data); |
| if (status < 0) { |
| dbg("Writing DCR1 failed status-0x%x\n", status); |
| break; |
| } else |
| dbg("DCR1 Writing success status%d\n", status); |
| |
| Data = 0x24; |
| status = mos7840_set_reg_sync(serial->port[i], |
| (__u16) (mos7840_port->DcrRegOffset + 2), Data); |
| if (status < 0) { |
| dbg("Writing DCR2 failed status-0x%x\n", status); |
| break; |
| } else |
| dbg("DCR2 Writing success status%d\n", status); |
| |
| /* write values in clkstart0x0 and clkmulti 0x20 */ |
| Data = 0x0; |
| status = mos7840_set_reg_sync(serial->port[i], |
| CLK_START_VALUE_REGISTER, Data); |
| if (status < 0) { |
| dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); |
| break; |
| } else |
| dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status); |
| |
| Data = 0x20; |
| status = mos7840_set_reg_sync(serial->port[i], |
| CLK_MULTI_REGISTER, Data); |
| if (status < 0) { |
| dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n", |
| status); |
| goto error; |
| } else |
| dbg("CLK_MULTI_REGISTER Writing success status%d\n", |
| status); |
| |
| /* write value 0x0 to scratchpad register */ |
| Data = 0x00; |
| status = mos7840_set_uart_reg(serial->port[i], |
| SCRATCH_PAD_REGISTER, Data); |
| if (status < 0) { |
| dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", |
| status); |
| break; |
| } else |
| dbg("SCRATCH_PAD_REGISTER Writing success status%d\n", |
| status); |
| |
| /* Zero Length flag register */ |
| if ((mos7840_port->port_num != 1) |
| && (serial->num_ports == 2)) { |
| |
| Data = 0xff; |
| status = mos7840_set_reg_sync(serial->port[i], |
| (__u16) (ZLP_REG1 + |
| ((__u16)mos7840_port->port_num)), Data); |
| dbg("ZLIP offset%x\n", |
| (__u16) (ZLP_REG1 + |
| ((__u16) mos7840_port->port_num))); |
| if (status < 0) { |
| dbg("Writing ZLP_REG%d failed status-0x%x\n", |
| i + 2, status); |
| break; |
| } else |
| dbg("ZLP_REG%d Writing success status%d\n", |
| i + 2, status); |
| } else { |
| Data = 0xff; |
| status = mos7840_set_reg_sync(serial->port[i], |
| (__u16) (ZLP_REG1 + |
| ((__u16)mos7840_port->port_num) - 0x1), Data); |
| dbg("ZLIP offset%x\n", |
| (__u16) (ZLP_REG1 + |
| ((__u16) mos7840_port->port_num) - 0x1)); |
| if (status < 0) { |
| dbg("Writing ZLP_REG%d failed status-0x%x\n", |
| i + 1, status); |
| break; |
| } else |
| dbg("ZLP_REG%d Writing success status%d\n", |
| i + 1, status); |
| |
| } |
| mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); |
| mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); |
| mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), |
| GFP_KERNEL); |
| if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || |
| !mos7840_port->dr) { |
| status = -ENOMEM; |
| goto error; |
| } |
| } |
| |
| /* Zero Length flag enable */ |
| Data = 0x0f; |
| status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); |
| if (status < 0) { |
| dbg("Writing ZLP_REG5 failed status-0x%x\n", status); |
| goto error; |
| } else |
| dbg("ZLP_REG5 Writing success status%d\n", status); |
| |
| /* setting configuration feature to one */ |
| usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ); |
| return 0; |
| error: |
| for (/* nothing */; i >= 0; i--) { |
| mos7840_port = mos7840_get_port_private(serial->port[i]); |
| |
| kfree(mos7840_port->dr); |
| kfree(mos7840_port->ctrl_buf); |
| usb_free_urb(mos7840_port->control_urb); |
| kfree(mos7840_port); |
| serial->port[i] = NULL; |
| } |
| return status; |
| } |
| |
| /**************************************************************************** |
| * mos7840_shutdown |
| * This function is called whenever the device is removed from the usb bus. |
| ****************************************************************************/ |
| |
| static void mos7840_shutdown(struct usb_serial *serial) |
| { |
| int i; |
| unsigned long flags; |
| struct moschip_port *mos7840_port; |
| dbg("%s \n", " shutdown :entering.........."); |
| |
| if (!serial) { |
| dbg("%s", "Invalid Handler \n"); |
| return; |
| } |
| |
| /* check for the ports to be closed,close the ports and disconnect */ |
| |
| /* free private structure allocated for serial port * |
| * stop reads and writes on all ports */ |
| |
| for (i = 0; i < serial->num_ports; ++i) { |
| mos7840_port = mos7840_get_port_private(serial->port[i]); |
| spin_lock_irqsave(&mos7840_port->pool_lock, flags); |
| mos7840_port->zombie = 1; |
| spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); |
| usb_kill_urb(mos7840_port->control_urb); |
| kfree(mos7840_port->ctrl_buf); |
| kfree(mos7840_port->dr); |
| kfree(mos7840_port); |
| mos7840_set_port_private(serial->port[i], NULL); |
| } |
| |
| dbg("%s\n", "Thank u :: "); |
| |
| } |
| |
| static struct usb_driver io_driver = { |
| .name = "mos7840", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = moschip_id_table_combined, |
| .no_dynamic_id = 1, |
| }; |
| |
| static struct usb_serial_driver moschip7840_4port_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "mos7840", |
| }, |
| .description = DRIVER_DESC, |
| .usb_driver = &io_driver, |
| .id_table = moschip_port_id_table, |
| .num_ports = 4, |
| .open = mos7840_open, |
| .close = mos7840_close, |
| .write = mos7840_write, |
| .write_room = mos7840_write_room, |
| .chars_in_buffer = mos7840_chars_in_buffer, |
| .throttle = mos7840_throttle, |
| .unthrottle = mos7840_unthrottle, |
| .calc_num_ports = mos7840_calc_num_ports, |
| #ifdef MCSSerialProbe |
| .probe = mos7840_serial_probe, |
| #endif |
| .ioctl = mos7840_ioctl, |
| .set_termios = mos7840_set_termios, |
| .break_ctl = mos7840_break, |
| .tiocmget = mos7840_tiocmget, |
| .tiocmset = mos7840_tiocmset, |
| .attach = mos7840_startup, |
| .shutdown = mos7840_shutdown, |
| .read_bulk_callback = mos7840_bulk_in_callback, |
| .read_int_callback = mos7840_interrupt_callback, |
| }; |
| |
| /**************************************************************************** |
| * moschip7840_init |
| * This is called by the module subsystem, or on startup to initialize us |
| ****************************************************************************/ |
| static int __init moschip7840_init(void) |
| { |
| int retval; |
| |
| dbg("%s \n", " mos7840_init :entering.........."); |
| |
| /* Register with the usb serial */ |
| retval = usb_serial_register(&moschip7840_4port_device); |
| |
| if (retval) |
| goto failed_port_device_register; |
| |
| dbg("%s\n", "Entring..."); |
| info(DRIVER_DESC " " DRIVER_VERSION); |
| |
| /* Register with the usb */ |
| retval = usb_register(&io_driver); |
| if (retval == 0) { |
| dbg("%s\n", "Leaving..."); |
| return 0; |
| } |
| usb_serial_deregister(&moschip7840_4port_device); |
| failed_port_device_register: |
| return retval; |
| } |
| |
| /**************************************************************************** |
| * moschip7840_exit |
| * Called when the driver is about to be unloaded. |
| ****************************************************************************/ |
| static void __exit moschip7840_exit(void) |
| { |
| |
| dbg("%s \n", " mos7840_exit :entering.........."); |
| |
| usb_deregister(&io_driver); |
| |
| usb_serial_deregister(&moschip7840_4port_device); |
| |
| dbg("%s\n", "Entring..."); |
| } |
| |
| module_init(moschip7840_init); |
| module_exit(moschip7840_exit); |
| |
| /* Module information */ |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |