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- /*
- * 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/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>
- #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 MOS_WDR_TIMEOUT 5000 /* 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
- #define MOSCHIP_DEVICE_ID_7810 0x7810
- /* 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 id_table.
- */
- #define USB_VENDOR_ID_BANDB 0x0856
- #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
- #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
- #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
- #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
- #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
- #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
- #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
- #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
- #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
- #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
- #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
- #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
- #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
- /* This driver also supports
- * ATEN UC2324 device using Moschip MCS7840
- * ATEN UC2322 device using Moschip MCS7820
- */
- #define USB_VENDOR_ID_ATENINTL 0x0557
- #define ATENINTL_DEVICE_ID_UC2324 0x2011
- #define ATENINTL_DEVICE_ID_UC2322 0x7820
- /* 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 GPIO_REGISTER ((__u16)(0x07))
- #define SERIAL_LCR_DLAB ((__u16)(0x0080))
- /*
- * URB POOL related defines
- */
- #define NUM_URBS 16 /* URB Count */
- #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
- /* LED on/off milliseconds*/
- #define LED_ON_MS 500
- #define LED_OFF_MS 500
- enum mos7840_flag {
- MOS7840_FLAG_CTRL_BUSY,
- MOS7840_FLAG_LED_BUSY,
- };
- static const struct usb_device_id 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_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
- {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
- {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
- {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
- {} /* terminating entry */
- };
- MODULE_DEVICE_TABLE(usb, id_table);
- /* 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 */
- __u8 shadowLCR; /* last LCR value received */
- __u8 shadowMCR; /* last MCR value received */
- char open;
- char open_ports;
- 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];
- bool read_urb_busy;
- /* For device(s) with LED indicator */
- bool has_led;
- struct timer_list led_timer1; /* Timer for LED on */
- struct timer_list led_timer2; /* Timer for LED off */
- struct urb *led_urb;
- struct usb_ctrlrequest *led_dr;
- unsigned long flags;
- };
- /*
- * 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;
- dev_dbg(&port->dev, "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;
- u8 *buf;
- buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
- MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
- MOS_WDR_TIMEOUT);
- if (ret < VENDOR_READ_LENGTH) {
- if (ret >= 0)
- ret = -EIO;
- goto out;
- }
- *val = buf[0];
- dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
- out:
- kfree(buf);
- 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->port_number + 1) << 8;
- } else {
- if (port->port_number == 0) {
- val |= ((__u16)port->port_number + 1) << 8;
- } else {
- val |= ((__u16)port->port_number + 2) << 8;
- }
- }
- dev_dbg(&port->dev, "%s application number is %x\n", __func__, 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;
- u8 *buf;
- buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- /* Wval is same as application number */
- if (port->serial->num_ports == 4) {
- Wval = ((__u16)port->port_number + 1) << 8;
- } else {
- if (port->port_number == 0) {
- Wval = ((__u16)port->port_number + 1) << 8;
- } else {
- Wval = ((__u16)port->port_number + 2) << 8;
- }
- }
- dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
- ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
- MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
- MOS_WDR_TIMEOUT);
- if (ret < VENDOR_READ_LENGTH) {
- if (ret >= 0)
- ret = -EIO;
- goto out;
- }
- *val = buf[0];
- out:
- kfree(buf);
- return ret;
- }
- static void mos7840_dump_serial_port(struct usb_serial_port *port,
- struct moschip_port *mos7840_port)
- {
- dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
- dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
- dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
- }
- /************************************************************************/
- /************************************************************************/
- /* 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;
- if (new_msr &
- (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
- MOS_MSR_DELTA_CD)) {
- icount = &mos7840_port->port->icount;
- /* update input line counters */
- if (new_msr & MOS_MSR_DELTA_CTS)
- icount->cts++;
- if (new_msr & MOS_MSR_DELTA_DSR)
- icount->dsr++;
- if (new_msr & MOS_MSR_DELTA_CD)
- icount->dcd++;
- if (new_msr & MOS_MSR_DELTA_RI)
- icount->rng++;
- wake_up_interruptible(&port->port->port.delta_msr_wait);
- }
- }
- static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
- {
- struct async_icount *icount;
- 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->port->icount;
- if (new_lsr & SERIAL_LSR_BI)
- icount->brk++;
- if (new_lsr & SERIAL_LSR_OE)
- icount->overrun++;
- if (new_lsr & SERIAL_LSR_PE)
- icount->parity++;
- if (new_lsr & SERIAL_LSR_FE)
- icount->frame++;
- }
- /************************************************************************/
- /************************************************************************/
- /* 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;
- struct device *dev = &urb->dev->dev;
- __u8 regval = 0x0;
- 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 */
- dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
- goto out;
- default:
- dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
- goto out;
- }
- dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
- if (urb->actual_length < 1)
- goto out;
- dev_dbg(dev, "%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];
- dev_dbg(dev, "%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);
- out:
- clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
- }
- 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;
- if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
- return -EBUSY;
- 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);
- if (ret)
- clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
- return ret;
- }
- static void mos7840_set_led_callback(struct urb *urb)
- {
- switch (urb->status) {
- case 0:
- /* Success */
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- /* This urb is terminated, clean up */
- dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n",
- __func__, urb->status);
- break;
- default:
- dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n",
- __func__, urb->status);
- }
- }
- static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
- __u16 reg)
- {
- struct usb_device *dev = mcs->port->serial->dev;
- struct usb_ctrlrequest *dr = mcs->led_dr;
- dr->bRequestType = MCS_WR_RTYPE;
- dr->bRequest = MCS_WRREQ;
- dr->wValue = cpu_to_le16(wval);
- dr->wIndex = cpu_to_le16(reg);
- dr->wLength = cpu_to_le16(0);
- usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
- (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
- usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
- }
- static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
- __u16 val)
- {
- struct usb_device *dev = port->serial->dev;
- usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
- val, reg, NULL, 0, MOS_WDR_TIMEOUT);
- }
- static void mos7840_led_off(unsigned long arg)
- {
- struct moschip_port *mcs = (struct moschip_port *) arg;
- /* Turn off LED */
- mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
- mod_timer(&mcs->led_timer2,
- jiffies + msecs_to_jiffies(LED_OFF_MS));
- }
- static void mos7840_led_flag_off(unsigned long arg)
- {
- struct moschip_port *mcs = (struct moschip_port *) arg;
- clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
- }
- static void mos7840_led_activity(struct usb_serial_port *port)
- {
- struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
- if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
- return;
- mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
- mod_timer(&mos7840_port->led_timer1,
- jiffies + msecs_to_jiffies(LED_ON_MS));
- }
- /*****************************************************************************
- * 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;
- switch (status) {
- case 0:
- /* success */
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- /* this urb is terminated, clean up */
- dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
- __func__, status);
- return;
- default:
- dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
- __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) {
- dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
- 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]->port_number + 1) << 8;
- if (mos7840_port->open) {
- if (sp[i] & 0x01) {
- dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
- } else {
- switch (sp[i] & 0x0f) {
- case SERIAL_IIR_RLS:
- dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
- dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
- mos7840_port->MsrLsr = 1;
- wreg = LINE_STATUS_REGISTER;
- break;
- case SERIAL_IIR_MS:
- dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
- mos7840_port->MsrLsr = 0;
- wreg = MODEM_STATUS_REGISTER;
- break;
- }
- rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
- }
- }
- }
- 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) {
- pr_debug("%s - port == NULL\n", function);
- return -1;
- }
- if (!port->serial) {
- pr_debug("%s - port->serial == NULL\n", 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) {
- pr_debug("%s - serial == NULL\n", function);
- return -1;
- }
- if (!serial->type) {
- pr_debug("%s - serial->type == NULL!\n", 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;
- int status = urb->status;
- mos7840_port = urb->context;
- if (!mos7840_port)
- return;
- if (status) {
- dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
- mos7840_port->read_urb_busy = false;
- return;
- }
- port = mos7840_port->port;
- if (mos7840_port_paranoia_check(port, __func__)) {
- mos7840_port->read_urb_busy = false;
- return;
- }
- serial = mos7840_get_usb_serial(port, __func__);
- if (!serial) {
- mos7840_port->read_urb_busy = false;
- return;
- }
- data = urb->transfer_buffer;
- usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
- if (urb->actual_length) {
- struct tty_port *tport = &mos7840_port->port->port;
- tty_insert_flip_string(tport, data, urb->actual_length);
- tty_flip_buffer_push(tport);
- port->icount.rx += urb->actual_length;
- dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
- }
- if (!mos7840_port->read_urb) {
- dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
- mos7840_port->read_urb_busy = false;
- return;
- }
- if (mos7840_port->has_led)
- mos7840_led_activity(port);
- mos7840_port->read_urb_busy = true;
- retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
- if (retval) {
- dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
- mos7840_port->read_urb_busy = false;
- }
- }
- /*****************************************************************************
- * 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 usb_serial_port *port;
- int status = urb->status;
- int i;
- mos7840_port = urb->context;
- port = mos7840_port->port;
- 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) {
- dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
- return;
- }
- if (mos7840_port_paranoia_check(port, __func__))
- return;
- if (mos7840_port->open)
- tty_port_tty_wakeup(&port->port);
- }
- /************************************************************************/
- /* 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 */
- /************************************************************************/
- /*****************************************************************************
- * 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)
- {
- 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__))
- return -ENODEV;
- serial = port->serial;
- if (mos7840_serial_paranoia_check(serial, __func__))
- 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)
- 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;
- 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) {
- dev_dbg(&port->dev, "Reading Spreg failed\n");
- goto err;
- }
- Data |= 0x80;
- status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "writing Spreg failed\n");
- goto err;
- }
- Data &= ~0x80;
- status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "writing Spreg failed\n");
- goto err;
- }
- /* End of block to be checked */
- Data = 0x0;
- status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
- &Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Reading Controlreg failed\n");
- goto err;
- }
- Data |= 0x08; /* Driver done bit */
- Data |= 0x20; /* rx_disable */
- status = mos7840_set_reg_sync(port,
- mos7840_port->ControlRegOffset, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "writing Controlreg failed\n");
- goto err;
- }
- /* 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) {
- dev_dbg(&port->dev, "disabling interrupts failed\n");
- goto err;
- }
- /* Set FIFO_CONTROL_REGISTER to the default value */
- Data = 0x00;
- status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
- goto err;
- }
- Data = 0xcf;
- status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
- goto err;
- }
- 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);
- /* 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) {
- /* FIXME: Buffer never NULL, so URB is not submitted. */
- 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) {
- dev_err(&port->dev, "%s - Error %d submitting "
- "interrupt urb\n", __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.) */
- dev_dbg(&port->dev, "port number is %d\n", port->port_number);
- dev_dbg(&port->dev, "minor number is %d\n", port->minor);
- dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
- dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
- dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
- dev_dbg(&port->dev, "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 */
- if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
- usb_fill_bulk_urb(mos7840_port->read_urb,
- serial->dev,
- usb_rcvbulkpipe(serial->dev,
- (port->bulk_in_endpointAddress) + 2),
- port->bulk_in_buffer,
- mos7840_port->read_urb->transfer_buffer_length,
- mos7840_bulk_in_callback, mos7840_port);
- } else {
- 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);
- }
- dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
- mos7840_port->read_urb_busy = true;
- response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
- if (response) {
- dev_err(&port->dev, "%s - Error %d submitting control urb\n",
- __func__, response);
- mos7840_port->read_urb_busy = false;
- }
- /* 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); */
- return 0;
- err:
- for (j = 0; j < NUM_URBS; ++j) {
- urb = mos7840_port->write_urb_pool[j];
- if (!urb)
- continue;
- kfree(urb->transfer_buffer);
- usb_free_urb(urb);
- }
- return status;
- }
- /*****************************************************************************
- * 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;
- if (mos7840_port_paranoia_check(port, __func__))
- return 0;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- return 0;
- spin_lock_irqsave(&mos7840_port->pool_lock, flags);
- for (i = 0; i < NUM_URBS; ++i) {
- if (mos7840_port->busy[i]) {
- struct urb *urb = mos7840_port->write_urb_pool[i];
- chars += urb->transfer_buffer_length;
- }
- }
- spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
- dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
- return chars;
- }
- /*****************************************************************************
- * mos7840_close
- * this function is called by the tty driver when a port is closed
- *****************************************************************************/
- static void mos7840_close(struct usb_serial_port *port)
- {
- struct usb_serial *serial;
- struct moschip_port *mos7840_port;
- struct moschip_port *port0;
- int j;
- __u16 Data;
- if (mos7840_port_paranoia_check(port, __func__))
- return;
- serial = mos7840_get_usb_serial(port, __func__);
- if (!serial)
- 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]) {
- kfree(mos7840_port->write_urb_pool[j]->transfer_buffer);
- usb_free_urb(mos7840_port->write_urb_pool[j]);
- }
- }
- usb_kill_urb(mos7840_port->write_urb);
- usb_kill_urb(mos7840_port->read_urb);
- mos7840_port->read_urb_busy = false;
- port0->open_ports--;
- dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
- if (port0->open_ports == 0) {
- if (serial->port[0]->interrupt_in_urb) {
- dev_dbg(&port->dev, "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 */
- 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;
- }
- /*****************************************************************************
- * 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;
- if (mos7840_port_paranoia_check(port, __func__))
- return;
- serial = mos7840_get_usb_serial(port, __func__);
- if (!serial)
- return;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- return;
- if (break_state == -1)
- data = mos7840_port->shadowLCR | LCR_SET_BREAK;
- else
- data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
- /* FIXME: no locking on shadowLCR anywhere in driver */
- mos7840_port->shadowLCR = data;
- dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
- mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
- mos7840_port->shadowLCR);
- }
- /*****************************************************************************
- * 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;
- if (mos7840_port_paranoia_check(port, __func__))
- return -1;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- 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;
- dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __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;
- if (mos7840_port_paranoia_check(port, __func__))
- return -1;
- serial = port->serial;
- if (mos7840_serial_paranoia_check(serial, __func__))
- return -1;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- 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];
- dev_dbg(&port->dev, "URB:%d\n", i);
- break;
- }
- }
- spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
- if (urb == NULL) {
- dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
- goto exit;
- }
- if (urb->transfer_buffer == NULL) {
- urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
- GFP_ATOMIC);
- if (!urb->transfer_buffer)
- goto exit;
- }
- transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
- memcpy(urb->transfer_buffer, current_position, transfer_size);
- /* fill urb with data and submit */
- if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
- usb_fill_bulk_urb(urb,
- serial->dev,
- usb_sndbulkpipe(serial->dev,
- (port->bulk_out_endpointAddress) + 2),
- urb->transfer_buffer,
- transfer_size,
- mos7840_bulk_out_data_callback, mos7840_port);
- } else {
- 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;
- dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
- if (mos7840_port->has_led)
- mos7840_led_activity(port);
- /* send it down the pipe */
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status) {
- mos7840_port->busy[i] = 0;
- dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
- "with status = %d\n", __func__, status);
- bytes_sent = status;
- goto exit;
- }
- bytes_sent = transfer_size;
- port->icount.tx += transfer_size;
- dev_dbg(&port->dev, "icount.tx is %d:\n", 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__))
- return;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- return;
- if (!mos7840_port->open) {
- dev_dbg(&port->dev, "%s", "port not opened\n");
- return;
- }
- /* 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;
- }
- }
- /*****************************************************************************
- * 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__))
- return;
- if (mos7840_port == NULL)
- return;
- if (!mos7840_port->open) {
- dev_dbg(&port->dev, "%s - port not opened\n", __func__);
- return;
- }
- /* 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 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);
- if (mos7840_port == NULL)
- return -ENODEV;
- status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
- if (status < 0)
- return -EIO;
- status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
- if (status < 0)
- return -EIO;
- 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);
- dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
- return result;
- }
- static int mos7840_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
- {
- struct usb_serial_port *port = tty->driver_data;
- struct moschip_port *mos7840_port;
- unsigned int mcr;
- int status;
- 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) {
- dev_dbg(&port->dev, "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(struct usb_serial_port *port,
- int baudRate, int *divisor,
- __u16 *clk_sel_val)
- {
- dev_dbg(&port->dev, "%s - %d\n", __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;
- }
- /*****************************************************************************
- * 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 = mos7840_port->port;
- if (mos7840_port_paranoia_check(port, __func__))
- return -1;
- if (mos7840_serial_paranoia_check(port->serial, __func__))
- return -1;
- number = mos7840_port->port->port_number;
- dev_dbg(&port->dev, "%s - baud = %d\n", __func__, 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) {
- dev_dbg(&port->dev, "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) {
- dev_dbg(&port->dev, "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(port, baudRate, &divisor,
- &clk_sel_val);
- status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
- &Data);
- if (status < 0) {
- dev_dbg(&port->dev, "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) {
- dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
- return -1;
- }
- /* Calculate the Divisor */
- if (status) {
- dev_err(&port->dev, "%s - bad baud rate\n", __func__);
- 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);
- dev_dbg(&port->dev, "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);
- dev_dbg(&port->dev, "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 = mos7840_port->port;
- if (mos7840_port_paranoia_check(port, __func__))
- return;
- if (mos7840_serial_paranoia_check(port->serial, __func__))
- return;
- serial = port->serial;
- if (!mos7840_port->open) {
- dev_dbg(&port->dev, "%s - port not opened\n", __func__);
- return;
- }
- 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 */
- 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;
- dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
- } else {
- lParity = LCR_PAR_EVEN;
- dev_dbg(&port->dev, "%s - parity = even\n", __func__);
- }
- } else {
- dev_dbg(&port->dev, "%s - parity = none\n", __func__);
- }
- if (cflag & CMSPAR)
- lParity = lParity | 0x20;
- /* Change the Stop bit */
- if (cflag & CSTOPB) {
- lStop = LCR_STOP_2;
- dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
- } else {
- lStop = LCR_STOP_1;
- dev_dbg(&port->dev, "%s - stop bits = 1\n", __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);
- dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
- 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... */
- dev_dbg(&port->dev, "%s", "Picked default baud...\n");
- baud = 9600;
- }
- dev_dbg(&port->dev, "%s - baud rate = %d\n", __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_busy == false) {
- mos7840_port->read_urb_busy = true;
- status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
- if (status) {
- dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
- status);
- mos7840_port->read_urb_busy = false;
- }
- }
- dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
- mos7840_port->shadowLCR);
- }
- /*****************************************************************************
- * 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;
- if (mos7840_port_paranoia_check(port, __func__))
- return;
- serial = port->serial;
- if (mos7840_serial_paranoia_check(serial, __func__))
- return;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- return;
- if (!mos7840_port->open) {
- dev_dbg(&port->dev, "%s - port not opened\n", __func__);
- return;
- }
- dev_dbg(&port->dev, "%s", "setting termios - \n");
- cflag = tty->termios.c_cflag;
- dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
- tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
- dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
- old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
- /* change the port settings to the new ones specified */
- mos7840_change_port_settings(tty, mos7840_port, old_termios);
- if (!mos7840_port->read_urb) {
- dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
- return;
- }
- if (mos7840_port->read_urb_busy == false) {
- mos7840_port->read_urb_busy = true;
- status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
- if (status) {
- dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
- status);
- mos7840_port->read_urb_busy = false;
- }
- }
- }
- /*****************************************************************************
- * 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)
- result = TIOCSER_TEMT;
- 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->minor;
- tmp.port = mos7840_port->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,
- 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;
- if (mos7840_port_paranoia_check(port, __func__))
- return -1;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port == NULL)
- return -1;
- switch (cmd) {
- /* return number of bytes available */
- case TIOCSERGETLSR:
- dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
- return mos7840_get_lsr_info(tty, argp);
- case TIOCGSERIAL:
- dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
- return mos7840_get_serial_info(mos7840_port, argp);
- case TIOCSSERIAL:
- dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
- break;
- default:
- break;
- }
- return -ENOIOCTLCMD;
- }
- static int mos7810_check(struct usb_serial *serial)
- {
- int i, pass_count = 0;
- u8 *buf;
- __u16 data = 0, mcr_data = 0;
- __u16 test_pattern = 0x55AA;
- int res;
- buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
- if (!buf)
- return 0; /* failed to identify 7810 */
- /* Store MCR setting */
- res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
- buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
- if (res == VENDOR_READ_LENGTH)
- mcr_data = *buf;
- for (i = 0; i < 16; i++) {
- /* Send the 1-bit test pattern out to MCS7810 test pin */
- usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- MCS_WRREQ, MCS_WR_RTYPE,
- (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
- MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
- /* Read the test pattern back */
- res = usb_control_msg(serial->dev,
- usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
- MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
- VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
- if (res == VENDOR_READ_LENGTH)
- data = *buf;
- /* If this is a MCS7810 device, both test patterns must match */
- if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
- break;
- pass_count++;
- }
- /* Restore MCR setting */
- usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
- MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
- 0, MOS_WDR_TIMEOUT);
- kfree(buf);
- if (pass_count == 16)
- return 1;
- return 0;
- }
- static int mos7840_probe(struct usb_serial *serial,
- const struct usb_device_id *id)
- {
- u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
- u8 *buf;
- int device_type;
- if (product == MOSCHIP_DEVICE_ID_7810 ||
- product == MOSCHIP_DEVICE_ID_7820) {
- device_type = product;
- goto out;
- }
- buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
- VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
- /* For a MCS7840 device GPIO0 must be set to 1 */
- if (buf[0] & 0x01)
- device_type = MOSCHIP_DEVICE_ID_7840;
- else if (mos7810_check(serial))
- device_type = MOSCHIP_DEVICE_ID_7810;
- else
- device_type = MOSCHIP_DEVICE_ID_7820;
- kfree(buf);
- out:
- usb_set_serial_data(serial, (void *)(unsigned long)device_type);
- return 0;
- }
- static int mos7840_calc_num_ports(struct usb_serial *serial)
- {
- int device_type = (unsigned long)usb_get_serial_data(serial);
- int mos7840_num_ports;
- mos7840_num_ports = (device_type >> 4) & 0x000F;
- return mos7840_num_ports;
- }
- static int mos7840_attach(struct usb_serial *serial)
- {
- if (serial->num_bulk_in < serial->num_ports ||
- serial->num_bulk_out < serial->num_ports ||
- serial->num_interrupt_in < 1) {
- dev_err(&serial->interface->dev, "missing endpoints\n");
- return -ENODEV;
- }
- return 0;
- }
- static int mos7840_port_probe(struct usb_serial_port *port)
- {
- struct usb_serial *serial = port->serial;
- int device_type = (unsigned long)usb_get_serial_data(serial);
- struct moschip_port *mos7840_port;
- int status;
- int pnum;
- __u16 Data;
- /* we set up the pointers to the endpoints in the mos7840_open *
- * function, as the structures aren't created yet. */
- pnum = port->port_number;
- dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
- mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
- if (!mos7840_port)
- return -ENOMEM;
- /* 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 = port;
- mos7840_set_port_private(port, mos7840_port);
- spin_lock_init(&mos7840_port->pool_lock);
- /* minor is not initialised until later by
- * usb-serial.c:get_free_serial() and cannot therefore be used
- * to index device instances */
- mos7840_port->port_num = pnum + 1;
- dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
- dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
- 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(port, mos7840_port);
- mos7840_set_port_private(port, mos7840_port);
- /* enable rx_disable bit in control register */
- status = mos7840_get_reg_sync(port,
- mos7840_port->ControlRegOffset, &Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "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(port,
- mos7840_port->ControlRegOffset, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "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(port,
- (__u16) (mos7840_port->DcrRegOffset + 0), Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
- Data = 0x05;
- status = mos7840_set_reg_sync(port,
- (__u16) (mos7840_port->DcrRegOffset + 1), Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
- Data = 0x24;
- status = mos7840_set_reg_sync(port,
- (__u16) (mos7840_port->DcrRegOffset + 2), Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
- /* write values in clkstart0x0 and clkmulti 0x20 */
- Data = 0x0;
- status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
- Data = 0x20;
- status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
- goto error;
- } else
- dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
- /* write value 0x0 to scratchpad register */
- Data = 0x00;
- status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
- goto out;
- } else
- dev_dbg(&port->dev, "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(port,
- (__u16) (ZLP_REG1 +
- ((__u16)mos7840_port->port_num)), Data);
- dev_dbg(&port->dev, "ZLIP offset %x\n",
- (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
- if (status < 0) {
- dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
- goto out;
- } else
- dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
- } else {
- Data = 0xff;
- status = mos7840_set_reg_sync(port,
- (__u16) (ZLP_REG1 +
- ((__u16)mos7840_port->port_num) - 0x1), Data);
- dev_dbg(&port->dev, "ZLIP offset %x\n",
- (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
- if (status < 0) {
- dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
- goto out;
- } else
- dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 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;
- }
- mos7840_port->has_led = false;
- /* Initialize LED timers */
- if (device_type == MOSCHIP_DEVICE_ID_7810) {
- mos7840_port->has_led = true;
- mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
- mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
- GFP_KERNEL);
- if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
- status = -ENOMEM;
- goto error;
- }
- setup_timer(&mos7840_port->led_timer1, mos7840_led_off,
- (unsigned long)mos7840_port);
- mos7840_port->led_timer1.expires =
- jiffies + msecs_to_jiffies(LED_ON_MS);
- setup_timer(&mos7840_port->led_timer2, mos7840_led_flag_off,
- (unsigned long)mos7840_port);
- mos7840_port->led_timer2.expires =
- jiffies + msecs_to_jiffies(LED_OFF_MS);
- /* Turn off LED */
- mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
- }
- out:
- if (pnum == serial->num_ports - 1) {
- /* Zero Length flag enable */
- Data = 0x0f;
- status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
- if (status < 0) {
- dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
- goto error;
- } else
- dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
- /* setting configuration feature to one */
- usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
- MOS_WDR_TIMEOUT);
- }
- return 0;
- error:
- kfree(mos7840_port->led_dr);
- usb_free_urb(mos7840_port->led_urb);
- kfree(mos7840_port->dr);
- kfree(mos7840_port->ctrl_buf);
- usb_free_urb(mos7840_port->control_urb);
- kfree(mos7840_port);
- return status;
- }
- static int mos7840_port_remove(struct usb_serial_port *port)
- {
- struct moschip_port *mos7840_port;
- mos7840_port = mos7840_get_port_private(port);
- if (mos7840_port->has_led) {
- /* Turn off LED */
- mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
- del_timer_sync(&mos7840_port->led_timer1);
- del_timer_sync(&mos7840_port->led_timer2);
- usb_kill_urb(mos7840_port->led_urb);
- usb_free_urb(mos7840_port->led_urb);
- kfree(mos7840_port->led_dr);
- }
- usb_kill_urb(mos7840_port->control_urb);
- usb_free_urb(mos7840_port->control_urb);
- kfree(mos7840_port->ctrl_buf);
- kfree(mos7840_port->dr);
- kfree(mos7840_port);
- return 0;
- }
- static struct usb_serial_driver moschip7840_4port_device = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "mos7840",
- },
- .description = DRIVER_DESC,
- .id_table = 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,
- .probe = mos7840_probe,
- .ioctl = mos7840_ioctl,
- .set_termios = mos7840_set_termios,
- .break_ctl = mos7840_break,
- .tiocmget = mos7840_tiocmget,
- .tiocmset = mos7840_tiocmset,
- .tiocmiwait = usb_serial_generic_tiocmiwait,
- .get_icount = usb_serial_generic_get_icount,
- .attach = mos7840_attach,
- .port_probe = mos7840_port_probe,
- .port_remove = mos7840_port_remove,
- .read_bulk_callback = mos7840_bulk_in_callback,
- .read_int_callback = mos7840_interrupt_callback,
- };
- static struct usb_serial_driver * const serial_drivers[] = {
- &moschip7840_4port_device, NULL
- };
- module_usb_serial_driver(serial_drivers, id_table);
- MODULE_DESCRIPTION(DRIVER_DESC);
- MODULE_LICENSE("GPL");
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