--- /dev/null
+/*
+ * spcp8x5 USB to serial adaptor driver
+ *
+ * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
+ * Copyright (C) 2006 S1 Corp.
+ *
+ * Original driver for 2.6.10 pl2303 driver by
+ * Greg Kroah-Hartman (greg@kroah.com)
+ * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
+ *
+ * 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.
+ *
+ *
+ */
+#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/spinlock.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+
+
+/* Version Information */
+#define DRIVER_VERSION "v0.04"
+#define DRIVER_DESC "SPCP8x5 USB to serial adaptor driver"
+
+static int debug;
+
+#define SPCP8x5_007_VID 0x04FC
+#define SPCP8x5_007_PID 0x0201
+#define SPCP8x5_008_VID 0x04fc
+#define SPCP8x5_008_PID 0x0235
+#define SPCP8x5_PHILIPS_VID 0x0471
+#define SPCP8x5_PHILIPS_PID 0x081e
+#define SPCP8x5_INTERMATIC_VID 0x04FC
+#define SPCP8x5_INTERMATIC_PID 0x0204
+#define SPCP8x5_835_VID 0x04fc
+#define SPCP8x5_835_PID 0x0231
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
+ { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
+ { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
+ { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
+ { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID)},
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+struct spcp8x5_usb_ctrl_arg {
+ u8 type;
+ u8 cmd;
+ u8 cmd_type;
+ u16 value;
+ u16 index;
+ u16 length;
+};
+
+/* wait 30s before close */
+#define SPCP8x5_CLOSING_WAIT (30*HZ)
+
+#define SPCP8x5_BUF_SIZE 1024
+
+
+/* spcp8x5 spec register define */
+#define MCR_CONTROL_LINE_RTS 0x02
+#define MCR_CONTROL_LINE_DTR 0x01
+#define MCR_DTR 0x01
+#define MCR_RTS 0x02
+
+#define MSR_STATUS_LINE_DCD 0x80
+#define MSR_STATUS_LINE_RI 0x40
+#define MSR_STATUS_LINE_DSR 0x20
+#define MSR_STATUS_LINE_CTS 0x10
+
+/* verdor command here , we should define myself */
+#define SET_DEFAULT 0x40
+#define SET_DEFAULT_TYPE 0x20
+
+#define SET_UART_FORMAT 0x40
+#define SET_UART_FORMAT_TYPE 0x21
+#define SET_UART_FORMAT_SIZE_5 0x00
+#define SET_UART_FORMAT_SIZE_6 0x01
+#define SET_UART_FORMAT_SIZE_7 0x02
+#define SET_UART_FORMAT_SIZE_8 0x03
+#define SET_UART_FORMAT_STOP_1 0x00
+#define SET_UART_FORMAT_STOP_2 0x04
+#define SET_UART_FORMAT_PAR_NONE 0x00
+#define SET_UART_FORMAT_PAR_ODD 0x10
+#define SET_UART_FORMAT_PAR_EVEN 0x30
+#define SET_UART_FORMAT_PAR_MASK 0xD0
+#define SET_UART_FORMAT_PAR_SPACE 0x90
+
+#define GET_UART_STATUS_TYPE 0xc0
+#define GET_UART_STATUS 0x22
+#define GET_UART_STATUS_MSR 0x06
+
+#define SET_UART_STATUS 0x40
+#define SET_UART_STATUS_TYPE 0x23
+#define SET_UART_STATUS_MCR 0x0004
+#define SET_UART_STATUS_MCR_DTR 0x01
+#define SET_UART_STATUS_MCR_RTS 0x02
+#define SET_UART_STATUS_MCR_LOOP 0x10
+
+#define SET_WORKING_MODE 0x40
+#define SET_WORKING_MODE_TYPE 0x24
+#define SET_WORKING_MODE_U2C 0x00
+#define SET_WORKING_MODE_RS485 0x01
+#define SET_WORKING_MODE_PDMA 0x02
+#define SET_WORKING_MODE_SPP 0x03
+
+#define SET_FLOWCTL_CHAR 0x40
+#define SET_FLOWCTL_CHAR_TYPE 0x25
+
+#define GET_VERSION 0xc0
+#define GET_VERSION_TYPE 0x26
+
+#define SET_REGISTER 0x40
+#define SET_REGISTER_TYPE 0x27
+
+#define GET_REGISTER 0xc0
+#define GET_REGISTER_TYPE 0x28
+
+#define SET_RAM 0x40
+#define SET_RAM_TYPE 0x31
+
+#define GET_RAM 0xc0
+#define GET_RAM_TYPE 0x32
+
+/* how come ??? */
+#define UART_STATE 0x08
+#define UART_STATE_TRANSIENT_MASK 0x74
+#define UART_DCD 0x01
+#define UART_DSR 0x02
+#define UART_BREAK_ERROR 0x04
+#define UART_RING 0x08
+#define UART_FRAME_ERROR 0x10
+#define UART_PARITY_ERROR 0x20
+#define UART_OVERRUN_ERROR 0x40
+#define UART_CTS 0x80
+
+enum spcp8x5_type {
+ SPCP825_007_TYPE,
+ SPCP825_008_TYPE,
+ SPCP825_PHILIP_TYPE,
+ SPCP825_INTERMATIC_TYPE,
+ SPCP835_TYPE,
+};
+
+/* 1st in 1st out buffer 4 driver */
+struct ringbuf {
+ unsigned int buf_size;
+ char *buf_buf;
+ char *buf_get;
+ char *buf_put;
+};
+
+/* alloc the ring buf and alloc the buffer itself */
+static inline struct ringbuf *alloc_ringbuf(unsigned int size)
+{
+ struct ringbuf *pb;
+
+ if (size == 0)
+ return NULL;
+
+ pb = kmalloc(sizeof(*pb), GFP_KERNEL);
+ if (pb == NULL)
+ return NULL;
+
+ pb->buf_buf = kmalloc(size, GFP_KERNEL);
+ if (pb->buf_buf == NULL) {
+ kfree(pb);
+ return NULL;
+ }
+
+ pb->buf_size = size;
+ pb->buf_get = pb->buf_put = pb->buf_buf;
+
+ return pb;
+}
+
+/* free the ring buf and the buffer itself */
+static inline void free_ringbuf(struct ringbuf *pb)
+{
+ if (pb != NULL) {
+ kfree(pb->buf_buf);
+ kfree(pb);
+ }
+}
+
+/* clear pipo , juest repoint the pointer here */
+static inline void clear_ringbuf(struct ringbuf *pb)
+{
+ if (pb != NULL)
+ pb->buf_get = pb->buf_put;
+}
+
+/* get the number of data in the pipo */
+static inline unsigned int ringbuf_avail_data(struct ringbuf *pb)
+{
+ if (pb == NULL)
+ return 0;
+ return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
+}
+
+/* get the number of space in the pipo */
+static inline unsigned int ringbuf_avail_space(struct ringbuf *pb)
+{
+ if (pb == NULL)
+ return 0;
+ return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
+}
+
+/* put count data into pipo */
+static unsigned int put_ringbuf(struct ringbuf *pb, const char *buf,
+ unsigned int count)
+{
+ unsigned int len;
+
+ if (pb == NULL)
+ return 0;
+
+ len = ringbuf_avail_space(pb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = pb->buf_buf + pb->buf_size - pb->buf_put;
+ if (count > len) {
+ memcpy(pb->buf_put, buf, len);
+ memcpy(pb->buf_buf, buf+len, count - len);
+ pb->buf_put = pb->buf_buf + count - len;
+ } else {
+ memcpy(pb->buf_put, buf, count);
+ if (count < len)
+ pb->buf_put += count;
+ else /* count == len */
+ pb->buf_put = pb->buf_buf;
+ }
+ return count;
+}
+
+/* get count data from pipo */
+static unsigned int get_ringbuf(struct ringbuf *pb, char *buf,
+ unsigned int count)
+{
+ unsigned int len;
+
+ if (pb == NULL || buf == NULL)
+ return 0;
+
+ len = ringbuf_avail_data(pb);
+ if (count > len)
+ count = len;
+
+ if (count == 0)
+ return 0;
+
+ len = pb->buf_buf + pb->buf_size - pb->buf_get;
+ if (count > len) {
+ memcpy(buf, pb->buf_get, len);
+ memcpy(buf+len, pb->buf_buf, count - len);
+ pb->buf_get = pb->buf_buf + count - len;
+ } else {
+ memcpy(buf, pb->buf_get, count);
+ if (count < len)
+ pb->buf_get += count;
+ else /* count == len */
+ pb->buf_get = pb->buf_buf;
+ }
+
+ return count;
+}
+
+static struct usb_driver spcp8x5_driver = {
+ .name = "spcp8x5",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table,
+ .no_dynamic_id = 1,
+};
+
+
+struct spcp8x5_private {
+ spinlock_t lock;
+ struct ringbuf *buf;
+ int write_urb_in_use;
+ enum spcp8x5_type type;
+ wait_queue_head_t delta_msr_wait;
+ u8 line_control;
+ u8 line_status;
+ u8 termios_initialized;
+};
+
+/* desc : when device plug in,this function would be called.
+ * thanks to usb_serial subsystem,then do almost every things for us. And what
+ * we should do just alloc the buffer */
+static int spcp8x5_startup(struct usb_serial *serial)
+{
+ struct spcp8x5_private *priv;
+ int i;
+ enum spcp8x5_type type = SPCP825_007_TYPE;
+
+ if (serial->dev->descriptor.idProduct == 0x0201)
+ type = SPCP825_007_TYPE;
+ else if (serial->dev->descriptor.idProduct == 0x0231)
+ type = SPCP835_TYPE;
+ else if (serial->dev->descriptor.idProduct == 0x0235)
+ type = SPCP825_008_TYPE;
+ else if (serial->dev->descriptor.idProduct == 0x0204)
+ type = SPCP825_INTERMATIC_TYPE;
+ else if (serial->dev->descriptor.idProduct == 0x0471 &&
+ serial->dev->descriptor.idVendor == 0x081e)
+ type = SPCP825_PHILIP_TYPE;
+ dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ priv = kzalloc(sizeof(struct spcp8x5_private), GFP_KERNEL);
+ if (!priv)
+ goto cleanup;
+
+ spin_lock_init(&priv->lock);
+ priv->buf = alloc_ringbuf(SPCP8x5_BUF_SIZE);
+ if (priv->buf == NULL)
+ goto cleanup2;
+
+ init_waitqueue_head(&priv->delta_msr_wait);
+ priv->type = type;
+ usb_set_serial_port_data(serial->port[i] , priv);
+
+ }
+
+ return 0;
+
+cleanup2:
+ kfree(priv);
+cleanup:
+ for (--i; i >= 0; --i) {
+ priv = usb_get_serial_port_data(serial->port[i]);
+ free_ringbuf(priv->buf);
+ kfree(priv);
+ usb_set_serial_port_data(serial->port[i] , NULL);
+ }
+ return -ENOMEM;
+}
+
+/* call when the device plug out. free all the memory alloced by probe */
+static void spcp8x5_shutdown(struct usb_serial *serial)
+{
+ int i;
+ struct spcp8x5_private *priv;
+
+ for (i = 0; i < serial->num_ports; i++) {
+ priv = usb_get_serial_port_data(serial->port[i]);
+ if (priv) {
+ free_ringbuf(priv->buf);
+ kfree(priv);
+ usb_set_serial_port_data(serial->port[i] , NULL);
+ }
+ }
+}
+
+/* set the modem control line of the device.
+ * NOTE spcp825-007 not supported this */
+static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
+ enum spcp8x5_type type)
+{
+ int retval;
+ u8 mcr = 0 ;
+
+ if (type == SPCP825_007_TYPE)
+ return -EPERM;
+
+ mcr = (unsigned short)value;
+ retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ SET_UART_STATUS_TYPE, SET_UART_STATUS,
+ mcr, 0x04, NULL, 0, 100);
+ if (retval != 0)
+ dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
+ return retval;
+}
+
+/* get the modem status register of the device
+ * NOTE spcp825-007 not supported this */
+static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
+ enum spcp8x5_type type)
+{
+ u8 *status_buffer;
+ int ret;
+
+ /* I return Permited not support here but seem inval device
+ * is more fix */
+ if (type == SPCP825_007_TYPE)
+ return -EPERM;
+ if (status == NULL)
+ return -EINVAL;
+
+ status_buffer = kmalloc(1, GFP_KERNEL);
+ if (!status_buffer)
+ return -ENOMEM;
+ status_buffer[0] = status[0];
+
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ GET_UART_STATUS, GET_UART_STATUS_TYPE,
+ 0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
+ if (ret < 0)
+ dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
+ status_buffer, ret);
+
+ dev_dbg(&dev->dev, "0xc0:0x22:0:6 %d - 0x%p ", ret, status_buffer);
+ status[0] = status_buffer[0];
+ kfree(status_buffer);
+
+ return ret;
+}
+
+/* select the work mode.
+ * NOTE this function not supported by spcp825-007 */
+static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
+ u16 index, enum spcp8x5_type type)
+{
+ int ret;
+
+ /* I return Permited not support here but seem inval device
+ * is more fix */
+ if (type == SPCP825_007_TYPE)
+ return;
+
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
+ value, index, NULL, 0, 100);
+ dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
+ if (ret < 0)
+ dev_dbg(&dev->dev,
+ "RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
+}
+
+/* close the serial port. We should wait for data sending to device 1st and
+ * then kill all urb. */
+static void spcp8x5_close(struct usb_serial_port *port, struct file *filp)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int c_cflag;
+ int bps;
+ long timeout;
+ wait_queue_t wait;
+ int result;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ /* wait for data to drain from the buffer */
+ spin_lock_irqsave(&priv->lock, flags);
+ timeout = SPCP8x5_CLOSING_WAIT;
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&port->tty->write_wait, &wait);
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (ringbuf_avail_data(priv->buf) == 0 ||
+ timeout == 0 || signal_pending(current))
+ break;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ timeout = schedule_timeout(timeout);
+ spin_lock_irqsave(&priv->lock, flags);
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->tty->write_wait, &wait);
+
+ /* clear out any remaining data in the buffer */
+ clear_ringbuf(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ /* wait for characters to drain from the device (this is long enough
+ * for the entire all byte spcp8x5 hardware buffer to drain with no
+ * flow control for data rates of 1200 bps or more, for lower rates we
+ * should really know how much data is in the buffer to compute a delay
+ * that is not unnecessarily long) */
+ bps = tty_get_baud_rate(port->tty);
+ if (bps > 1200)
+ timeout = max((HZ*2560) / bps, HZ/10);
+ else
+ timeout = 2*HZ;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(timeout);
+
+ /* clear control lines */
+ if (port->tty) {
+ c_cflag = port->tty->termios->c_cflag;
+ if (c_cflag & HUPCL) {
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->line_control = 0;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ spcp8x5_set_ctrlLine(port->serial->dev, 0 , priv->type);
+ }
+ }
+
+ /* kill urb */
+ if (port->write_urb != NULL) {
+ result = usb_unlink_urb(port->write_urb);
+ if (result)
+ dev_dbg(&port->dev,
+ "usb_unlink_urb(write_urb) = %d\n", result);
+ }
+ result = usb_unlink_urb(port->read_urb);
+ if (result)
+ dev_dbg(&port->dev, "usb_unlink_urb(read_urb) = %d\n", result);
+}
+
+/* set the serial param for transfer. we should check if we really need to
+ * transfer. then if be set flow contorl we should do this too. */
+static void spcp8x5_set_termios(struct usb_serial_port *port,
+ struct ktermios *old_termios)
+{
+ struct usb_serial *serial = port->serial;
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int cflag = port->tty->termios->c_cflag;
+ unsigned int old_cflag = old_termios->c_cflag;
+ unsigned short uartdata;
+ unsigned char buf[2] = {0, 0};
+ int baud;
+ int i;
+ u8 control;
+
+ if ((!port->tty) || (!port->tty->termios))
+ return;
+
+ /* for the 1st time call this function */
+ spin_lock_irqsave(&priv->lock, flags);
+ if (!priv->termios_initialized) {
+ *(port->tty->termios) = tty_std_termios;
+ port->tty->termios->c_cflag = B115200 | CS8 | CREAD |
+ HUPCL | CLOCAL;
+ priv->termios_initialized = 1;
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ /* check that they really want us to change something */
+ if (!tty_termios_hw_change(port->tty->termios, old_termios))
+ return;
+
+ /* set DTR/RTS active */
+ spin_lock_irqsave(&priv->lock, flags);
+ control = priv->line_control;
+ if ((old_cflag & CBAUD) == B0) {
+ priv->line_control |= MCR_DTR;
+ if (!(old_cflag & CRTSCTS))
+ priv->line_control |= MCR_RTS;
+ }
+ if (control != priv->line_control) {
+ control = priv->line_control;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
+ } else {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+
+ /* Set Baud Rate */
+ baud = tty_get_baud_rate(port->tty);;
+ switch (baud) {
+ case 300: buf[0] = 0x00; break;
+ case 600: buf[0] = 0x01; break;
+ case 1200: buf[0] = 0x02; break;
+ case 2400: buf[0] = 0x03; break;
+ case 4800: buf[0] = 0x04; break;
+ case 9600: buf[0] = 0x05; break;
+ case 19200: buf[0] = 0x07; break;
+ case 38400: buf[0] = 0x09; break;
+ case 57600: buf[0] = 0x0a; break;
+ case 115200: buf[0] = 0x0b; break;
+ case 230400: buf[0] = 0x0c; break;
+ case 460800: buf[0] = 0x0d; break;
+ case 921600: buf[0] = 0x0e; break;
+/* case 1200000: buf[0] = 0x0f; break; */
+/* case 2400000: buf[0] = 0x10; break; */
+ case 3000000: buf[0] = 0x11; break;
+/* case 6000000: buf[0] = 0x12; break; */
+ case 0:
+ case 1000000:
+ buf[0] = 0x0b; break;
+ default:
+ err("spcp825 driver does not support the baudrate "
+ "requested, using default of 9600.");
+ }
+
+ /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
+ if (cflag & CSIZE) {
+ switch (cflag & CSIZE) {
+ case CS5:
+ buf[1] |= SET_UART_FORMAT_SIZE_5;
+ break;
+ case CS6:
+ buf[1] |= SET_UART_FORMAT_SIZE_6;
+ break;
+ case CS7:
+ buf[1] |= SET_UART_FORMAT_SIZE_7;
+ break;
+ default:
+ case CS8:
+ buf[1] |= SET_UART_FORMAT_SIZE_8;
+ break;
+ }
+ }
+
+ /* Set Stop bit2 : 0:1bit 1:2bit */
+ buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
+ SET_UART_FORMAT_STOP_1;
+
+ /* Set Parity bit3-4 01:Odd 11:Even */
+ if (cflag & PARENB) {
+ buf[1] |= (cflag & PARODD) ?
+ SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
+ } else
+ buf[1] |= SET_UART_FORMAT_PAR_NONE;
+
+ uartdata = buf[0] | buf[1]<<8;
+
+ i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
+ uartdata, 0, NULL, 0, 100);
+ if (i < 0)
+ err("Set UART format %#x failed (error = %d)", uartdata, i);
+ dbg("0x21:0x40:0:0 %d\n", i);
+
+ if (cflag & CRTSCTS) {
+ /* enable hardware flow control */
+ spcp8x5_set_workMode(serial->dev, 0x000a,
+ SET_WORKING_MODE_U2C, priv->type);
+ }
+ return;
+}
+
+/* open the serial port. do some usb system call. set termios and get the line
+ * status of the device. then submit the read urb */
+static int spcp8x5_open(struct usb_serial_port *port, struct file *filp)
+{
+ struct ktermios tmp_termios;
+ struct usb_serial *serial = port->serial;
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ int ret;
+ unsigned long flags;
+ u8 status = 0x30;
+ /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
+
+ dbg("%s - port %d", __func__, port->number);
+
+ usb_clear_halt(serial->dev, port->write_urb->pipe);
+ usb_clear_halt(serial->dev, port->read_urb->pipe);
+
+ ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ 0x09, 0x00,
+ 0x01, 0x00, NULL, 0x00, 100);
+ if (ret)
+ return ret;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (port->tty->termios->c_cflag & CBAUD)
+ priv->line_control = MCR_DTR | MCR_RTS;
+ else
+ priv->line_control = 0;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
+
+ /* Setup termios */
+ if (port->tty)
+ spcp8x5_set_termios(port, &tmp_termios);
+
+ spcp8x5_get_msr(serial->dev, &status, priv->type);
+
+ /* may be we should update uart status here but now we did not do */
+ spin_lock_irqsave(&priv->lock, flags);
+ priv->line_status = status & 0xf0 ;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ /* FIXME: need to assert RTS and DTR if CRTSCTS off */
+
+ dbg("%s - submitting read urb", __func__);
+ port->read_urb->dev = serial->dev;
+ ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (ret) {
+ spcp8x5_close(port, NULL);
+ return -EPROTO;
+ }
+ return 0;
+}
+
+/* bulk read call back function. check the status of the urb. if transfer
+ * failed return. then update the status and the tty send data to tty subsys.
+ * submit urb again.
+ */
+static void spcp8x5_read_bulk_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ struct tty_struct *tty;
+ unsigned char *data = urb->transfer_buffer;
+ unsigned long flags;
+ int i;
+ int result;
+ u8 status = 0;
+ char tty_flag;
+
+ dev_dbg(&port->dev, "start, urb->status = %d, "
+ "urb->actual_length = %d\n,", urb->status, urb->actual_length);
+
+ /* check the urb status */
+ if (urb->status) {
+ if (!port->open_count)
+ return;
+ if (urb->status == -EPROTO) {
+ /* spcp8x5 mysteriously fails with -EPROTO */
+ /* reschedule the read */
+ urb->status = 0;
+ urb->dev = port->serial->dev;
+ result = usb_submit_urb(urb , GFP_ATOMIC);
+ if (result)
+ dev_dbg(&port->dev,
+ "failed submitting read urb %d\n",
+ result);
+ return;
+ }
+ dev_dbg(&port->dev, "unable to handle the error, exiting.\n");
+ return;
+ }
+
+ /* get tty_flag from status */
+ tty_flag = TTY_NORMAL;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ status = priv->line_status;
+ priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
+ spin_unlock_irqrestore(&priv->lock, flags);
+ /* wake up the wait for termios */
+ wake_up_interruptible(&priv->delta_msr_wait);
+
+ /* break takes precedence over parity, which takes precedence over
+ * framing errors */
+ if (status & UART_BREAK_ERROR)
+ tty_flag = TTY_BREAK;
+ else if (status & UART_PARITY_ERROR)
+ tty_flag = TTY_PARITY;
+ else if (status & UART_FRAME_ERROR)
+ tty_flag = TTY_FRAME;
+ dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
+
+ tty = port->tty;
+ if (tty && urb->actual_length) {
+ tty_buffer_request_room(tty, urb->actual_length + 1);
+ /* overrun is special, not associated with a char */
+ if (status & UART_OVERRUN_ERROR)
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ for (i = 0; i < urb->actual_length; ++i)
+ tty_insert_flip_char(tty, data[i], tty_flag);
+ tty_flip_buffer_push(tty);
+ }
+
+ /* Schedule the next read _if_ we are still open */
+ if (port->open_count) {
+ urb->dev = port->serial->dev;
+ result = usb_submit_urb(urb , GFP_ATOMIC);
+ if (result)
+ dev_dbg(&port->dev, "failed submitting read urb %d\n",
+ result);
+ }
+
+ return;
+}
+
+/* get data from ring buffer and then write to usb bus */
+static void spcp8x5_send(struct usb_serial_port *port)
+{
+ int count, result;
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (priv->write_urb_in_use) {
+ dev_dbg(&port->dev, "write urb still used\n");
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return;
+ }
+
+ /* send the 1st urb for writting */
+ memset(port->write_urb->transfer_buffer , 0x00 , port->bulk_out_size);
+ count = get_ringbuf(priv->buf, port->write_urb->transfer_buffer,
+ port->bulk_out_size);
+
+ if (count == 0) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return;
+ }
+
+ /* update the urb status */
+ priv->write_urb_in_use = 1;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ port->write_urb->transfer_buffer_length = count;
+ port->write_urb->dev = port->serial->dev;
+
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (result) {
+ dev_dbg(&port->dev, "failed submitting write urb, error %d\n",
+ result);
+ priv->write_urb_in_use = 0;
+ /* TODO: reschedule spcp8x5_send */
+ }
+
+
+ schedule_work(&port->work);
+}
+
+/* this is the call back function for write urb. NOTE we should not sleep in
+ * this routine. check the urb return code and then submit the write urb again
+ * to hold the write loop */
+static void spcp8x5_write_bulk_callback(struct urb *urb)
+{
+ struct usb_serial_port *port = urb->context;
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ int result;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dev_dbg(&port->dev, "urb shutting down with status: %d\n",
+ urb->status);
+ priv->write_urb_in_use = 0;
+ return;
+ default:
+ /* error in the urb, so we have to resubmit it */
+ dbg("%s - Overflow in write", __func__);
+ dbg("%s - nonzero write bulk status received: %d",
+ __func__, urb->status);
+ port->write_urb->transfer_buffer_length = 1;
+ port->write_urb->dev = port->serial->dev;
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (result)
+ dev_dbg(&port->dev,
+ "failed resubmitting write urb %d\n", result);
+ else
+ return;
+ }
+
+ priv->write_urb_in_use = 0;
+
+ /* send any buffered data */
+ spcp8x5_send(port);
+}
+
+/* write data to ring buffer. and then start the write transfer */
+static int spcp8x5_write(struct usb_serial_port *port,
+ const unsigned char *buf, int count)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+
+ dev_dbg(&port->dev, "%d bytes\n", count);
+
+ if (!count)
+ return count;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ count = put_ringbuf(priv->buf, buf, count);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ spcp8x5_send(port);
+
+ return count;
+}
+
+static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
+ unsigned int arg)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int prevstatus;
+ unsigned int status;
+ unsigned int changed;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ prevstatus = priv->line_status;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ while (1) {
+ /* wake up in bulk read */
+ interruptible_sleep_on(&priv->delta_msr_wait);
+
+ /* see if a signal did it */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ status = priv->line_status;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ changed = prevstatus^status;
+
+ if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
+ ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
+ ((arg & TIOCM_CD) && (changed & MSR_STATUS_LINE_DCD)) ||
+ ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
+ return 0;
+
+ prevstatus = status;
+ }
+ /* NOTREACHED */
+ return 0;
+}
+
+static int spcp8x5_ioctl(struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
+
+ switch (cmd) {
+ case TIOCMIWAIT:
+ dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
+ return spcp8x5_wait_modem_info(port, arg);
+
+ default:
+ dbg("%s not supported = 0x%04x", __func__, cmd);
+ break;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static int spcp8x5_tiocmset(struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ u8 control;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (set & TIOCM_RTS)
+ priv->line_control |= MCR_RTS;
+ if (set & TIOCM_DTR)
+ priv->line_control |= MCR_DTR;
+ if (clear & TIOCM_RTS)
+ priv->line_control &= ~MCR_RTS;
+ if (clear & TIOCM_DTR)
+ priv->line_control &= ~MCR_DTR;
+ control = priv->line_control;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
+}
+
+static int spcp8x5_tiocmget(struct usb_serial_port *port, struct file *file)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ unsigned long flags;
+ unsigned int mcr;
+ unsigned int status;
+ unsigned int result;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ mcr = priv->line_control;
+ status = priv->line_status;
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
+ | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
+ | ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0)
+ | ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0)
+ | ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0)
+ | ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0);
+
+ return result;
+}
+
+/* get the avail space room in ring buffer */
+static int spcp8x5_write_room(struct usb_serial_port *port)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ int room = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ room = ringbuf_avail_space(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return room;
+}
+
+/* get the number of avail data in write ring buffer */
+static int spcp8x5_chars_in_buffer(struct usb_serial_port *port)
+{
+ struct spcp8x5_private *priv = usb_get_serial_port_data(port);
+ int chars = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ chars = ringbuf_avail_data(priv->buf);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return chars;
+}
+
+/* All of the device info needed for the spcp8x5 SIO serial converter */
+static struct usb_serial_driver spcp8x5_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "SPCP8x5",
+ },
+ .id_table = id_table,
+ .num_interrupt_in = NUM_DONT_CARE,
+ .num_bulk_in = 1,
+ .num_bulk_out = 1,
+ .num_ports = 1,
+ .open = spcp8x5_open,
+ .close = spcp8x5_close,
+ .write = spcp8x5_write,
+ .set_termios = spcp8x5_set_termios,
+ .ioctl = spcp8x5_ioctl,
+ .tiocmget = spcp8x5_tiocmget,
+ .tiocmset = spcp8x5_tiocmset,
+ .write_room = spcp8x5_write_room,
+ .read_bulk_callback = spcp8x5_read_bulk_callback,
+ .write_bulk_callback = spcp8x5_write_bulk_callback,
+ .chars_in_buffer = spcp8x5_chars_in_buffer,
+ .attach = spcp8x5_startup,
+ .shutdown = spcp8x5_shutdown,
+};
+
+static int __init spcp8x5_init(void)
+{
+ int retval;
+ retval = usb_serial_register(&spcp8x5_device);
+ if (retval)
+ goto failed_usb_serial_register;
+ retval = usb_register(&spcp8x5_driver);
+ if (retval)
+ goto failed_usb_register;
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ return 0;
+failed_usb_register:
+ usb_serial_deregister(&spcp8x5_device);
+failed_usb_serial_register:
+ return retval;
+}
+
+static void __exit spcp8x5_exit(void)
+{
+ usb_deregister(&spcp8x5_driver);
+ usb_serial_deregister(&spcp8x5_device);
+}
+
+module_init(spcp8x5_init);
+module_exit(spcp8x5_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff