--- /dev/null
+/*
+ * mos7720.c
+ * Controls the Moschip 7720 usb to dual port serial converter
+ *
+ * Copyright 2006 Moschip Semiconductor Tech. Ltd.
+ *
+ * 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, version 2 of the License.
+ *
+ * Developed by:
+ * Vijaya Kumar <vijaykumar.gn@gmail.com>
+ * Ajay Kumar <naanuajay@yahoo.com>
+ * Gurudeva <ngurudeva@yahoo.com>
+ *
+ * Cleaned up from the original by:
+ * Greg Kroah-Hartman <gregkh@suse.de>
+ *
+ * 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/spinlock.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include <linux/uaccess.h>
+#include <linux/parport.h>
+
+#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
+#define DRIVER_DESC "Moschip USB Serial Driver"
+
+/* default urb timeout */
+#define MOS_WDR_TIMEOUT 5000
+
+#define MOS_MAX_PORT 0x02
+#define MOS_WRITE 0x0E
+#define MOS_READ 0x0D
+
+/* Interrupt Routines Defines */
+#define SERIAL_IIR_RLS 0x06
+#define SERIAL_IIR_RDA 0x04
+#define SERIAL_IIR_CTI 0x0c
+#define SERIAL_IIR_THR 0x02
+#define SERIAL_IIR_MS 0x00
+
+#define NUM_URBS 16 /* URB Count */
+#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
+
+/* This structure holds all of the local serial port information */
+struct moschip_port {
+ __u8 shadowLCR; /* last LCR value received */
+ __u8 shadowMCR; /* last MCR value received */
+ __u8 shadowMSR; /* last MSR value received */
+ char open;
+ struct usb_serial_port *port; /* loop back to the owner */
+ struct urb *write_urb_pool[NUM_URBS];
+};
+
+static struct usb_serial_driver moschip7720_2port_driver;
+
+#define USB_VENDOR_ID_MOSCHIP 0x9710
+#define MOSCHIP_DEVICE_ID_7720 0x7720
+#define MOSCHIP_DEVICE_ID_7715 0x7715
+
+static const struct usb_device_id id_table[] = {
+ { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) },
+ { USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7715) },
+ { } /* terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
+
+/* initial values for parport regs */
+#define DCR_INIT_VAL 0x0c /* SLCTIN, nINIT */
+#define ECR_INIT_VAL 0x00 /* SPP mode */
+
+struct urbtracker {
+ struct mos7715_parport *mos_parport;
+ struct list_head urblist_entry;
+ struct kref ref_count;
+ struct urb *urb;
+ struct usb_ctrlrequest *setup;
+};
+
+enum mos7715_pp_modes {
+ SPP = 0<<5,
+ PS2 = 1<<5, /* moschip calls this 'NIBBLE' mode */
+ PPF = 2<<5, /* moschip calls this 'CB-FIFO mode */
+};
+
+struct mos7715_parport {
+ struct parport *pp; /* back to containing struct */
+ struct kref ref_count; /* to instance of this struct */
+ struct list_head deferred_urbs; /* list deferred async urbs */
+ struct list_head active_urbs; /* list async urbs in flight */
+ spinlock_t listlock; /* protects list access */
+ bool msg_pending; /* usb sync call pending */
+ struct completion syncmsg_compl; /* usb sync call completed */
+ struct tasklet_struct urb_tasklet; /* for sending deferred urbs */
+ struct usb_serial *serial; /* back to containing struct */
+ __u8 shadowECR; /* parallel port regs... */
+ __u8 shadowDCR;
+ atomic_t shadowDSR; /* updated in int-in callback */
+};
+
+/* lock guards against dereferencing NULL ptr in parport ops callbacks */
+static DEFINE_SPINLOCK(release_lock);
+
+#endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
+
+static const unsigned int dummy; /* for clarity in register access fns */
+
+enum mos_regs {
+ THR, /* serial port regs */
+ RHR,
+ IER,
+ FCR,
+ ISR,
+ LCR,
+ MCR,
+ LSR,
+ MSR,
+ SPR,
+ DLL,
+ DLM,
+ DPR, /* parallel port regs */
+ DSR,
+ DCR,
+ ECR,
+ SP1_REG, /* device control regs */
+ SP2_REG, /* serial port 2 (7720 only) */
+ PP_REG,
+ SP_CONTROL_REG,
+};
+
+/*
+ * Return the correct value for the Windex field of the setup packet
+ * for a control endpoint message. See the 7715 datasheet.
+ */
+static inline __u16 get_reg_index(enum mos_regs reg)
+{
+ static const __u16 mos7715_index_lookup_table[] = {
+ 0x00, /* THR */
+ 0x00, /* RHR */
+ 0x01, /* IER */
+ 0x02, /* FCR */
+ 0x02, /* ISR */
+ 0x03, /* LCR */
+ 0x04, /* MCR */
+ 0x05, /* LSR */
+ 0x06, /* MSR */
+ 0x07, /* SPR */
+ 0x00, /* DLL */
+ 0x01, /* DLM */
+ 0x00, /* DPR */
+ 0x01, /* DSR */
+ 0x02, /* DCR */
+ 0x0a, /* ECR */
+ 0x01, /* SP1_REG */
+ 0x02, /* SP2_REG (7720 only) */
+ 0x04, /* PP_REG (7715 only) */
+ 0x08, /* SP_CONTROL_REG */
+ };
+ return mos7715_index_lookup_table[reg];
+}
+
+/*
+ * Return the correct value for the upper byte of the Wvalue field of
+ * the setup packet for a control endpoint message.
+ */
+static inline __u16 get_reg_value(enum mos_regs reg,
+ unsigned int serial_portnum)
+{
+ if (reg >= SP1_REG) /* control reg */
+ return 0x0000;
+
+ else if (reg >= DPR) /* parallel port reg (7715 only) */
+ return 0x0100;
+
+ else /* serial port reg */
+ return (serial_portnum + 2) << 8;
+}
+
+/*
+ * Write data byte to the specified device register. The data is embedded in
+ * the value field of the setup packet. serial_portnum is ignored for registers
+ * not specific to a particular serial port.
+ */
+static int write_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
+ enum mos_regs reg, __u8 data)
+{
+ struct usb_device *usbdev = serial->dev;
+ unsigned int pipe = usb_sndctrlpipe(usbdev, 0);
+ __u8 request = (__u8)0x0e;
+ __u8 requesttype = (__u8)0x40;
+ __u16 index = get_reg_index(reg);
+ __u16 value = get_reg_value(reg, serial_portnum) + data;
+ int status = usb_control_msg(usbdev, pipe, request, requesttype, value,
+ index, NULL, 0, MOS_WDR_TIMEOUT);
+ if (status < 0)
+ dev_err(&usbdev->dev,
+ "mos7720: usb_control_msg() failed: %d\n", status);
+ return status;
+}
+
+/*
+ * Read data byte from the specified device register. The data returned by the
+ * device is embedded in the value field of the setup packet. serial_portnum is
+ * ignored for registers that are not specific to a particular serial port.
+ */
+static int read_mos_reg(struct usb_serial *serial, unsigned int serial_portnum,
+ enum mos_regs reg, __u8 *data)
+{
+ struct usb_device *usbdev = serial->dev;
+ unsigned int pipe = usb_rcvctrlpipe(usbdev, 0);
+ __u8 request = (__u8)0x0d;
+ __u8 requesttype = (__u8)0xc0;
+ __u16 index = get_reg_index(reg);
+ __u16 value = get_reg_value(reg, serial_portnum);
+ u8 *buf;
+ int status;
+
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ status = usb_control_msg(usbdev, pipe, request, requesttype, value,
+ index, buf, 1, MOS_WDR_TIMEOUT);
+ if (status == 1)
+ *data = *buf;
+ else if (status < 0)
+ dev_err(&usbdev->dev,
+ "mos7720: usb_control_msg() failed: %d\n", status);
+ kfree(buf);
+
+ return status;
+}
+
+#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
+
+static inline int mos7715_change_mode(struct mos7715_parport *mos_parport,
+ enum mos7715_pp_modes mode)
+{
+ mos_parport->shadowECR = mode;
+ write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR);
+ return 0;
+}
+
+static void destroy_mos_parport(struct kref *kref)
+{
+ struct mos7715_parport *mos_parport =
+ container_of(kref, struct mos7715_parport, ref_count);
+
+ kfree(mos_parport);
+}
+
+static void destroy_urbtracker(struct kref *kref)
+{
+ struct urbtracker *urbtrack =
+ container_of(kref, struct urbtracker, ref_count);
+ struct mos7715_parport *mos_parport = urbtrack->mos_parport;
+
+ usb_free_urb(urbtrack->urb);
+ kfree(urbtrack->setup);
+ kfree(urbtrack);
+ kref_put(&mos_parport->ref_count, destroy_mos_parport);
+}
+
+/*
+ * This runs as a tasklet when sending an urb in a non-blocking parallel
+ * port callback had to be deferred because the disconnect mutex could not be
+ * obtained at the time.
+ */
+static void send_deferred_urbs(unsigned long _mos_parport)
+{
+ int ret_val;
+ unsigned long flags;
+ struct mos7715_parport *mos_parport = (void *)_mos_parport;
+ struct urbtracker *urbtrack, *tmp;
+ struct list_head *cursor, *next;
+ struct device *dev;
+
+ /* if release function ran, game over */
+ if (unlikely(mos_parport->serial == NULL))
+ return;
+
+ dev = &mos_parport->serial->dev->dev;
+
+ /* try again to get the mutex */
+ if (!mutex_trylock(&mos_parport->serial->disc_mutex)) {
+ dev_dbg(dev, "%s: rescheduling tasklet\n", __func__);
+ tasklet_schedule(&mos_parport->urb_tasklet);
+ return;
+ }
+
+ /* if device disconnected, game over */
+ if (unlikely(mos_parport->serial->disconnected)) {
+ mutex_unlock(&mos_parport->serial->disc_mutex);
+ return;
+ }
+
+ spin_lock_irqsave(&mos_parport->listlock, flags);
+ if (list_empty(&mos_parport->deferred_urbs)) {
+ spin_unlock_irqrestore(&mos_parport->listlock, flags);
+ mutex_unlock(&mos_parport->serial->disc_mutex);
+ dev_dbg(dev, "%s: deferred_urbs list empty\n", __func__);
+ return;
+ }
+
+ /* move contents of deferred_urbs list to active_urbs list and submit */
+ list_for_each_safe(cursor, next, &mos_parport->deferred_urbs)
+ list_move_tail(cursor, &mos_parport->active_urbs);
+ list_for_each_entry_safe(urbtrack, tmp, &mos_parport->active_urbs,
+ urblist_entry) {
+ ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC);
+ dev_dbg(dev, "%s: urb submitted\n", __func__);
+ if (ret_val) {
+ dev_err(dev, "usb_submit_urb() failed: %d\n", ret_val);
+ list_del(&urbtrack->urblist_entry);
+ kref_put(&urbtrack->ref_count, destroy_urbtracker);
+ }
+ }
+ spin_unlock_irqrestore(&mos_parport->listlock, flags);
+ mutex_unlock(&mos_parport->serial->disc_mutex);
+}
+
+/* callback for parallel port control urbs submitted asynchronously */
+static void async_complete(struct urb *urb)
+{
+ struct urbtracker *urbtrack = urb->context;
+ int status = urb->status;
+
+ if (unlikely(status))
+ dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
+
+ /* remove the urbtracker from the active_urbs list */
+ spin_lock(&urbtrack->mos_parport->listlock);
+ list_del(&urbtrack->urblist_entry);
+ spin_unlock(&urbtrack->mos_parport->listlock);
+ kref_put(&urbtrack->ref_count, destroy_urbtracker);
+}
+
+static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport,
+ enum mos_regs reg, __u8 data)
+{
+ struct urbtracker *urbtrack;
+ int ret_val;
+ unsigned long flags;
+ struct usb_serial *serial = mos_parport->serial;
+ struct usb_device *usbdev = serial->dev;
+
+ /* create and initialize the control urb and containing urbtracker */
+ urbtrack = kmalloc(sizeof(struct urbtracker), GFP_ATOMIC);
+ if (!urbtrack)
+ return -ENOMEM;
+
+ kref_get(&mos_parport->ref_count);
+ urbtrack->mos_parport = mos_parport;
+ urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urbtrack->urb) {
+ kfree(urbtrack);
+ return -ENOMEM;
+ }
+ urbtrack->setup = kmalloc(sizeof(*urbtrack->setup), GFP_ATOMIC);
+ if (!urbtrack->setup) {
+ usb_free_urb(urbtrack->urb);
+ kfree(urbtrack);
+ return -ENOMEM;
+ }
+ urbtrack->setup->bRequestType = (__u8)0x40;
+ urbtrack->setup->bRequest = (__u8)0x0e;
+ urbtrack->setup->wValue = cpu_to_le16(get_reg_value(reg, dummy));
+ urbtrack->setup->wIndex = cpu_to_le16(get_reg_index(reg));
+ urbtrack->setup->wLength = 0;
+ usb_fill_control_urb(urbtrack->urb, usbdev,
+ usb_sndctrlpipe(usbdev, 0),
+ (unsigned char *)urbtrack->setup,
+ NULL, 0, async_complete, urbtrack);
+ kref_init(&urbtrack->ref_count);
+ INIT_LIST_HEAD(&urbtrack->urblist_entry);
+
+ /*
+ * get the disconnect mutex, or add tracker to the deferred_urbs list
+ * and schedule a tasklet to try again later
+ */
+ if (!mutex_trylock(&serial->disc_mutex)) {
+ spin_lock_irqsave(&mos_parport->listlock, flags);
+ list_add_tail(&urbtrack->urblist_entry,
+ &mos_parport->deferred_urbs);
+ spin_unlock_irqrestore(&mos_parport->listlock, flags);
+ tasklet_schedule(&mos_parport->urb_tasklet);
+ dev_dbg(&usbdev->dev, "tasklet scheduled\n");
+ return 0;
+ }
+
+ /* bail if device disconnected */
+ if (serial->disconnected) {
+ kref_put(&urbtrack->ref_count, destroy_urbtracker);
+ mutex_unlock(&serial->disc_mutex);
+ return -ENODEV;
+ }
+
+ /* add the tracker to the active_urbs list and submit */
+ spin_lock_irqsave(&mos_parport->listlock, flags);
+ list_add_tail(&urbtrack->urblist_entry, &mos_parport->active_urbs);
+ spin_unlock_irqrestore(&mos_parport->listlock, flags);
+ ret_val = usb_submit_urb(urbtrack->urb, GFP_ATOMIC);
+ mutex_unlock(&serial->disc_mutex);
+ if (ret_val) {
+ dev_err(&usbdev->dev,
+ "%s: submit_urb() failed: %d\n", __func__, ret_val);
+ spin_lock_irqsave(&mos_parport->listlock, flags);
+ list_del(&urbtrack->urblist_entry);
+ spin_unlock_irqrestore(&mos_parport->listlock, flags);
+ kref_put(&urbtrack->ref_count, destroy_urbtracker);
+ return ret_val;
+ }
+ return 0;
+}
+
+/*
+ * This is the the common top part of all parallel port callback operations that
+ * send synchronous messages to the device. This implements convoluted locking
+ * that avoids two scenarios: (1) a port operation is called after usbserial
+ * has called our release function, at which point struct mos7715_parport has
+ * been destroyed, and (2) the device has been disconnected, but usbserial has
+ * not called the release function yet because someone has a serial port open.
+ * The shared release_lock prevents the first, and the mutex and disconnected
+ * flag maintained by usbserial covers the second. We also use the msg_pending
+ * flag to ensure that all synchronous usb message calls have completed before
+ * our release function can return.
+ */
+static int parport_prologue(struct parport *pp)
+{
+ struct mos7715_parport *mos_parport;
+
+ spin_lock(&release_lock);
+ mos_parport = pp->private_data;
+ if (unlikely(mos_parport == NULL)) {
+ /* release fn called, port struct destroyed */
+ spin_unlock(&release_lock);
+ return -1;
+ }
+ mos_parport->msg_pending = true; /* synch usb call pending */
+ reinit_completion(&mos_parport->syncmsg_compl);
+ spin_unlock(&release_lock);
+
+ mutex_lock(&mos_parport->serial->disc_mutex);
+ if (mos_parport->serial->disconnected) {
+ /* device disconnected */
+ mutex_unlock(&mos_parport->serial->disc_mutex);
+ mos_parport->msg_pending = false;
+ complete(&mos_parport->syncmsg_compl);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * This is the common bottom part of all parallel port functions that send
+ * synchronous messages to the device.
+ */
+static inline void parport_epilogue(struct parport *pp)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+ mutex_unlock(&mos_parport->serial->disc_mutex);
+ mos_parport->msg_pending = false;
+ complete(&mos_parport->syncmsg_compl);
+}
+
+static void parport_mos7715_write_data(struct parport *pp, unsigned char d)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+
+ if (parport_prologue(pp) < 0)
+ return;
+ mos7715_change_mode(mos_parport, SPP);
+ write_mos_reg(mos_parport->serial, dummy, DPR, (__u8)d);
+ parport_epilogue(pp);
+}
+
+static unsigned char parport_mos7715_read_data(struct parport *pp)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+ unsigned char d;
+
+ if (parport_prologue(pp) < 0)
+ return 0;
+ read_mos_reg(mos_parport->serial, dummy, DPR, &d);
+ parport_epilogue(pp);
+ return d;
+}
+
+static void parport_mos7715_write_control(struct parport *pp, unsigned char d)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+ __u8 data;
+
+ if (parport_prologue(pp) < 0)
+ return;
+ data = ((__u8)d & 0x0f) | (mos_parport->shadowDCR & 0xf0);
+ write_mos_reg(mos_parport->serial, dummy, DCR, data);
+ mos_parport->shadowDCR = data;
+ parport_epilogue(pp);
+}
+
+static unsigned char parport_mos7715_read_control(struct parport *pp)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+ __u8 dcr;
+
+ spin_lock(&release_lock);
+ mos_parport = pp->private_data;
+ if (unlikely(mos_parport == NULL)) {
+ spin_unlock(&release_lock);
+ return 0;
+ }
+ dcr = mos_parport->shadowDCR & 0x0f;
+ spin_unlock(&release_lock);
+ return dcr;
+}
+
+static unsigned char parport_mos7715_frob_control(struct parport *pp,
+ unsigned char mask,
+ unsigned char val)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+ __u8 dcr;
+
+ mask &= 0x0f;
+ val &= 0x0f;
+ if (parport_prologue(pp) < 0)
+ return 0;
+ mos_parport->shadowDCR = (mos_parport->shadowDCR & (~mask)) ^ val;
+ write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
+ dcr = mos_parport->shadowDCR & 0x0f;
+ parport_epilogue(pp);
+ return dcr;
+}
+
+static unsigned char parport_mos7715_read_status(struct parport *pp)
+{
+ unsigned char status;
+ struct mos7715_parport *mos_parport = pp->private_data;
+
+ spin_lock(&release_lock);
+ mos_parport = pp->private_data;
+ if (unlikely(mos_parport == NULL)) { /* release called */
+ spin_unlock(&release_lock);
+ return 0;
+ }
+ status = atomic_read(&mos_parport->shadowDSR) & 0xf8;
+ spin_unlock(&release_lock);
+ return status;
+}
+
+static void parport_mos7715_enable_irq(struct parport *pp)
+{
+}
+
+static void parport_mos7715_disable_irq(struct parport *pp)
+{
+}
+
+static void parport_mos7715_data_forward(struct parport *pp)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+
+ if (parport_prologue(pp) < 0)
+ return;
+ mos7715_change_mode(mos_parport, PS2);
+ mos_parport->shadowDCR &= ~0x20;
+ write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
+ parport_epilogue(pp);
+}
+
+static void parport_mos7715_data_reverse(struct parport *pp)
+{
+ struct mos7715_parport *mos_parport = pp->private_data;
+
+ if (parport_prologue(pp) < 0)
+ return;
+ mos7715_change_mode(mos_parport, PS2);
+ mos_parport->shadowDCR |= 0x20;
+ write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
+ parport_epilogue(pp);
+}
+
+static void parport_mos7715_init_state(struct pardevice *dev,
+ struct parport_state *s)
+{
+ s->u.pc.ctr = DCR_INIT_VAL;
+ s->u.pc.ecr = ECR_INIT_VAL;
+}
+
+/* N.B. Parport core code requires that this function not block */
+static void parport_mos7715_save_state(struct parport *pp,
+ struct parport_state *s)
+{
+ struct mos7715_parport *mos_parport;
+
+ spin_lock(&release_lock);
+ mos_parport = pp->private_data;
+ if (unlikely(mos_parport == NULL)) { /* release called */
+ spin_unlock(&release_lock);
+ return;
+ }
+ s->u.pc.ctr = mos_parport->shadowDCR;
+ s->u.pc.ecr = mos_parport->shadowECR;
+ spin_unlock(&release_lock);
+}
+
+/* N.B. Parport core code requires that this function not block */
+static void parport_mos7715_restore_state(struct parport *pp,
+ struct parport_state *s)
+{
+ struct mos7715_parport *mos_parport;
+
+ spin_lock(&release_lock);
+ mos_parport = pp->private_data;
+ if (unlikely(mos_parport == NULL)) { /* release called */
+ spin_unlock(&release_lock);
+ return;
+ }
+ write_parport_reg_nonblock(mos_parport, DCR, mos_parport->shadowDCR);
+ write_parport_reg_nonblock(mos_parport, ECR, mos_parport->shadowECR);
+ spin_unlock(&release_lock);
+}
+
+static size_t parport_mos7715_write_compat(struct parport *pp,
+ const void *buffer,
+ size_t len, int flags)
+{
+ int retval;
+ struct mos7715_parport *mos_parport = pp->private_data;
+ int actual_len;
+
+ if (parport_prologue(pp) < 0)
+ return 0;
+ mos7715_change_mode(mos_parport, PPF);
+ retval = usb_bulk_msg(mos_parport->serial->dev,
+ usb_sndbulkpipe(mos_parport->serial->dev, 2),
+ (void *)buffer, len, &actual_len,
+ MOS_WDR_TIMEOUT);
+ parport_epilogue(pp);
+ if (retval) {
+ dev_err(&mos_parport->serial->dev->dev,
+ "mos7720: usb_bulk_msg() failed: %d\n", retval);
+ return 0;
+ }
+ return actual_len;
+}
+
+static struct parport_operations parport_mos7715_ops = {
+ .owner = THIS_MODULE,
+ .write_data = parport_mos7715_write_data,
+ .read_data = parport_mos7715_read_data,
+
+ .write_control = parport_mos7715_write_control,
+ .read_control = parport_mos7715_read_control,
+ .frob_control = parport_mos7715_frob_control,
+
+ .read_status = parport_mos7715_read_status,
+
+ .enable_irq = parport_mos7715_enable_irq,
+ .disable_irq = parport_mos7715_disable_irq,
+
+ .data_forward = parport_mos7715_data_forward,
+ .data_reverse = parport_mos7715_data_reverse,
+
+ .init_state = parport_mos7715_init_state,
+ .save_state = parport_mos7715_save_state,
+ .restore_state = parport_mos7715_restore_state,
+
+ .compat_write_data = parport_mos7715_write_compat,
+
+ .nibble_read_data = parport_ieee1284_read_nibble,
+ .byte_read_data = parport_ieee1284_read_byte,
+};
+
+/*
+ * Allocate and initialize parallel port control struct, initialize
+ * the parallel port hardware device, and register with the parport subsystem.
+ */
+static int mos7715_parport_init(struct usb_serial *serial)
+{
+ struct mos7715_parport *mos_parport;
+
+ /* allocate and initialize parallel port control struct */
+ mos_parport = kzalloc(sizeof(struct mos7715_parport), GFP_KERNEL);
+ if (!mos_parport)
+ return -ENOMEM;
+
+ mos_parport->msg_pending = false;
+ kref_init(&mos_parport->ref_count);
+ spin_lock_init(&mos_parport->listlock);
+ INIT_LIST_HEAD(&mos_parport->active_urbs);
+ INIT_LIST_HEAD(&mos_parport->deferred_urbs);
+ usb_set_serial_data(serial, mos_parport); /* hijack private pointer */
+ mos_parport->serial = serial;
+ tasklet_init(&mos_parport->urb_tasklet, send_deferred_urbs,
+ (unsigned long) mos_parport);
+ init_completion(&mos_parport->syncmsg_compl);
+
+ /* cycle parallel port reset bit */
+ write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x80);
+ write_mos_reg(mos_parport->serial, dummy, PP_REG, (__u8)0x00);
+
+ /* initialize device registers */
+ mos_parport->shadowDCR = DCR_INIT_VAL;
+ write_mos_reg(mos_parport->serial, dummy, DCR, mos_parport->shadowDCR);
+ mos_parport->shadowECR = ECR_INIT_VAL;
+ write_mos_reg(mos_parport->serial, dummy, ECR, mos_parport->shadowECR);
+
+ /* register with parport core */
+ mos_parport->pp = parport_register_port(0, PARPORT_IRQ_NONE,
+ PARPORT_DMA_NONE,
+ &parport_mos7715_ops);
+ if (mos_parport->pp == NULL) {
+ dev_err(&serial->interface->dev,
+ "Could not register parport\n");
+ kref_put(&mos_parport->ref_count, destroy_mos_parport);
+ return -EIO;
+ }
+ mos_parport->pp->private_data = mos_parport;
+ mos_parport->pp->modes = PARPORT_MODE_COMPAT | PARPORT_MODE_PCSPP;
+ mos_parport->pp->dev = &serial->interface->dev;
+ parport_announce_port(mos_parport->pp);
+
+ return 0;
+}
+#endif /* CONFIG_USB_SERIAL_MOS7715_PARPORT */
+
+/*
+ * mos7720_interrupt_callback
+ * this is the callback function for when we have received data on the
+ * interrupt endpoint.
+ */
+static void mos7720_interrupt_callback(struct urb *urb)
+{
+ int result;
+ int length;
+ int status = urb->status;
+ struct device *dev = &urb->dev->dev;
+ __u8 *data;
+ __u8 sp1;
+ __u8 sp2;
+
+ 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);
+ return;
+ default:
+ dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
+ goto exit;
+ }
+
+ length = urb->actual_length;
+ data = urb->transfer_buffer;
+
+ /* Moschip get 4 bytes
+ * Byte 1 IIR Port 1 (port.number is 0)
+ * Byte 2 IIR Port 2 (port.number is 1)
+ * Byte 3 --------------
+ * Byte 4 FIFO status for both */
+
+ /* the above description is inverted
+ * oneukum 2007-03-14 */
+
+ if (unlikely(length != 4)) {
+ dev_dbg(dev, "Wrong data !!!\n");
+ return;
+ }
+
+ sp1 = data[3];
+ sp2 = data[2];
+
+ if ((sp1 | sp2) & 0x01) {
+ /* No Interrupt Pending in both the ports */
+ dev_dbg(dev, "No Interrupt !!!\n");
+ } else {
+ switch (sp1 & 0x0f) {
+ case SERIAL_IIR_RLS:
+ dev_dbg(dev, "Serial Port 1: Receiver status error or address bit detected in 9-bit mode\n");
+ break;
+ case SERIAL_IIR_CTI:
+ dev_dbg(dev, "Serial Port 1: Receiver time out\n");
+ break;
+ case SERIAL_IIR_MS:
+ /* dev_dbg(dev, "Serial Port 1: Modem status change\n"); */
+ break;
+ }
+
+ switch (sp2 & 0x0f) {
+ case SERIAL_IIR_RLS:
+ dev_dbg(dev, "Serial Port 2: Receiver status error or address bit detected in 9-bit mode\n");
+ break;
+ case SERIAL_IIR_CTI:
+ dev_dbg(dev, "Serial Port 2: Receiver time out\n");
+ break;
+ case SERIAL_IIR_MS:
+ /* dev_dbg(dev, "Serial Port 2: Modem status change\n"); */
+ break;
+ }
+ }
+
+exit:
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result);
+}
+
+/*
+ * mos7715_interrupt_callback
+ * this is the 7715's callback function for when we have received data on
+ * the interrupt endpoint.
+ */
+static void mos7715_interrupt_callback(struct urb *urb)
+{
+ int result;
+ int length;
+ int status = urb->status;
+ struct device *dev = &urb->dev->dev;
+ __u8 *data;
+ __u8 iir;
+
+ switch (status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ case -ENODEV:
+ /* this urb is terminated, clean up */
+ dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
+ return;
+ default:
+ dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
+ goto exit;
+ }
+
+ length = urb->actual_length;
+ data = urb->transfer_buffer;
+
+ /* Structure of data from 7715 device:
+ * Byte 1: IIR serial Port
+ * Byte 2: unused
+ * Byte 2: DSR parallel port
+ * Byte 4: FIFO status for both */
+
+ if (unlikely(length != 4)) {
+ dev_dbg(dev, "Wrong data !!!\n");
+ return;
+ }
+
+ iir = data[0];
+ if (!(iir & 0x01)) { /* serial port interrupt pending */
+ switch (iir & 0x0f) {
+ case SERIAL_IIR_RLS:
+ dev_dbg(dev, "Serial Port: Receiver status error or address bit detected in 9-bit mode\n");
+ break;
+ case SERIAL_IIR_CTI:
+ dev_dbg(dev, "Serial Port: Receiver time out\n");
+ break;
+ case SERIAL_IIR_MS:
+ /* dev_dbg(dev, "Serial Port: Modem status change\n"); */
+ break;
+ }
+ }
+
+#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
+ { /* update local copy of DSR reg */
+ struct usb_serial_port *port = urb->context;
+ struct mos7715_parport *mos_parport = port->serial->private;
+ if (unlikely(mos_parport == NULL))
+ return;
+ atomic_set(&mos_parport->shadowDSR, data[2]);
+ }
+#endif
+
+exit:
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_err(dev, "%s - Error %d submitting control urb\n", __func__, result);
+}
+
+/*
+ * mos7720_bulk_in_callback
+ * this is the callback function for when we have received data on the
+ * bulk in endpoint.
+ */
+static void mos7720_bulk_in_callback(struct urb *urb)
+{
+ int retval;
+ unsigned char *data ;
+ struct usb_serial_port *port;
+ int status = urb->status;
+
+ if (status) {
+ dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
+ return;
+ }
+
+ port = urb->context;
+
+ dev_dbg(&port->dev, "Entering...%s\n", __func__);
+
+ data = urb->transfer_buffer;
+
+ if (urb->actual_length) {
+ tty_insert_flip_string(&port->port, data, urb->actual_length);
+ tty_flip_buffer_push(&port->port);
+ }
+
+ if (port->read_urb->status != -EINPROGRESS) {
+ retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (retval)
+ dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
+ }
+}
+
+/*
+ * mos7720_bulk_out_data_callback
+ * this is the callback function for when we have finished sending serial
+ * data on the bulk out endpoint.
+ */
+static void mos7720_bulk_out_data_callback(struct urb *urb)
+{
+ struct moschip_port *mos7720_port;
+ int status = urb->status;
+
+ if (status) {
+ dev_dbg(&urb->dev->dev, "nonzero write bulk status received:%d\n", status);
+ return;
+ }
+
+ mos7720_port = urb->context;
+ if (!mos7720_port) {
+ dev_dbg(&urb->dev->dev, "NULL mos7720_port pointer\n");
+ return ;
+ }
+
+ if (mos7720_port->open)
+ tty_port_tty_wakeup(&mos7720_port->port->port);
+}
+
+/*
+ * mos77xx_probe
+ * this function installs the appropriate read interrupt endpoint callback
+ * depending on whether the device is a 7720 or 7715, thus avoiding costly
+ * run-time checks in the high-frequency callback routine itself.
+ */
+static int mos77xx_probe(struct usb_serial *serial,
+ const struct usb_device_id *id)
+{
+ if (id->idProduct == MOSCHIP_DEVICE_ID_7715)
+ moschip7720_2port_driver.read_int_callback =
+ mos7715_interrupt_callback;
+ else
+ moschip7720_2port_driver.read_int_callback =
+ mos7720_interrupt_callback;
+
+ return 0;
+}
+
+static int mos77xx_calc_num_ports(struct usb_serial *serial)
+{
+ u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
+ if (product == MOSCHIP_DEVICE_ID_7715)
+ return 1;
+
+ return 2;
+}
+
+static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+ struct usb_serial *serial;
+ struct urb *urb;
+ struct moschip_port *mos7720_port;
+ int response;
+ int port_number;
+ __u8 data;
+ int allocated_urbs = 0;
+ int j;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return -ENODEV;
+
+ usb_clear_halt(serial->dev, port->write_urb->pipe);
+ usb_clear_halt(serial->dev, port->read_urb->pipe);
+
+ /* Initialising the write urb pool */
+ for (j = 0; j < NUM_URBS; ++j) {
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ mos7720_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(mos7720_port->write_urb_pool[j]);
+ mos7720_port->write_urb_pool[j] = NULL;
+ continue;
+ }
+ allocated_urbs++;
+ }
+
+ if (!allocated_urbs)
+ return -ENOMEM;
+
+ /* Initialize MCS7720 -- Write Init values to corresponding Registers
+ *
+ * Register Index
+ * 0 : THR/RHR
+ * 1 : IER
+ * 2 : FCR
+ * 3 : LCR
+ * 4 : MCR
+ * 5 : LSR
+ * 6 : MSR
+ * 7 : SPR
+ *
+ * 0x08 : SP1/2 Control Reg
+ */
+ port_number = port->port_number;
+ read_mos_reg(serial, port_number, LSR, &data);
+
+ dev_dbg(&port->dev, "SS::%p LSR:%x\n", mos7720_port, data);
+
+ write_mos_reg(serial, dummy, SP1_REG, 0x02);
+ write_mos_reg(serial, dummy, SP2_REG, 0x02);
+
+ write_mos_reg(serial, port_number, IER, 0x00);
+ write_mos_reg(serial, port_number, FCR, 0x00);
+
+ write_mos_reg(serial, port_number, FCR, 0xcf);
+ mos7720_port->shadowLCR = 0x03;
+ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
+ mos7720_port->shadowMCR = 0x0b;
+ write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
+
+ write_mos_reg(serial, port_number, SP_CONTROL_REG, 0x00);
+ read_mos_reg(serial, dummy, SP_CONTROL_REG, &data);
+ data = data | (port->port_number + 1);
+ write_mos_reg(serial, dummy, SP_CONTROL_REG, data);
+ mos7720_port->shadowLCR = 0x83;
+ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
+ write_mos_reg(serial, port_number, THR, 0x0c);
+ write_mos_reg(serial, port_number, IER, 0x00);
+ mos7720_port->shadowLCR = 0x03;
+ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
+ write_mos_reg(serial, port_number, IER, 0x0c);
+
+ response = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (response)
+ dev_err(&port->dev, "%s - Error %d submitting read urb\n",
+ __func__, response);
+
+ /* initialize our port settings */
+ mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
+
+ /* send a open port command */
+ mos7720_port->open = 1;
+
+ return 0;
+}
+
+/*
+ * mos7720_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 a negative error number.
+ */
+static int mos7720_chars_in_buffer(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ int i;
+ int chars = 0;
+ struct moschip_port *mos7720_port;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return 0;
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7720_port->write_urb_pool[i] &&
+ mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
+ chars += URB_TRANSFER_BUFFER_SIZE;
+ }
+ dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
+ return chars;
+}
+
+static void mos7720_close(struct usb_serial_port *port)
+{
+ struct usb_serial *serial;
+ struct moschip_port *mos7720_port;
+ int j;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return;
+
+ for (j = 0; j < NUM_URBS; ++j)
+ usb_kill_urb(mos7720_port->write_urb_pool[j]);
+
+ /* Freeing Write URBs */
+ for (j = 0; j < NUM_URBS; ++j) {
+ if (mos7720_port->write_urb_pool[j]) {
+ kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
+ usb_free_urb(mos7720_port->write_urb_pool[j]);
+ }
+ }
+
+ /* While closing port, shutdown all bulk read, write *
+ * and interrupt read if they exists, otherwise nop */
+ usb_kill_urb(port->write_urb);
+ usb_kill_urb(port->read_urb);
+
+ write_mos_reg(serial, port->port_number, MCR, 0x00);
+ write_mos_reg(serial, port->port_number, IER, 0x00);
+
+ mos7720_port->open = 0;
+}
+
+static void mos7720_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 *mos7720_port;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return;
+
+ if (break_state == -1)
+ data = mos7720_port->shadowLCR | UART_LCR_SBC;
+ else
+ data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
+
+ mos7720_port->shadowLCR = data;
+ write_mos_reg(serial, port->port_number, LCR, mos7720_port->shadowLCR);
+}
+
+/*
+ * mos7720_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 mos7720_write_room(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port;
+ int room = 0;
+ int i;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return -ENODEV;
+
+ /* FIXME: Locking */
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7720_port->write_urb_pool[i] &&
+ mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
+ room += URB_TRANSFER_BUFFER_SIZE;
+ }
+
+ dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+ return room;
+}
+
+static int mos7720_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;
+
+ struct moschip_port *mos7720_port;
+ struct usb_serial *serial;
+ struct urb *urb;
+ const unsigned char *current_position = data;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return -ENODEV;
+
+ /* try to find a free urb in the list */
+ urb = NULL;
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7720_port->write_urb_pool[i] &&
+ mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
+ urb = mos7720_port->write_urb_pool[i];
+ dev_dbg(&port->dev, "URB:%d\n", i);
+ break;
+ }
+ }
+
+ 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_KERNEL);
+ if (!urb->transfer_buffer)
+ goto exit;
+ }
+ transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
+
+ memcpy(urb->transfer_buffer, current_position, transfer_size);
+ usb_serial_debug_data(&port->dev, __func__, transfer_size,
+ urb->transfer_buffer);
+
+ /* fill urb with data and submit */
+ usb_fill_bulk_urb(urb, serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port->bulk_out_endpointAddress),
+ urb->transfer_buffer, transfer_size,
+ mos7720_bulk_out_data_callback, mos7720_port);
+
+ /* send it down the pipe */
+ status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (status) {
+ 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;
+
+exit:
+ return bytes_sent;
+}
+
+static void mos7720_throttle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port;
+ int status;
+
+ mos7720_port = usb_get_serial_port_data(port);
+
+ if (mos7720_port == NULL)
+ return;
+
+ if (!mos7720_port->open) {
+ dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+ return;
+ }
+
+ /* if we are implementing XON/XOFF, send the stop character */
+ if (I_IXOFF(tty)) {
+ unsigned char stop_char = STOP_CHAR(tty);
+ status = mos7720_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) {
+ mos7720_port->shadowMCR &= ~UART_MCR_RTS;
+ write_mos_reg(port->serial, port->port_number, MCR,
+ mos7720_port->shadowMCR);
+ }
+}
+
+static void mos7720_unthrottle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
+ int status;
+
+ if (mos7720_port == NULL)
+ return;
+
+ if (!mos7720_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 = mos7720_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) {
+ mos7720_port->shadowMCR |= UART_MCR_RTS;
+ write_mos_reg(port->serial, port->port_number, MCR,
+ mos7720_port->shadowMCR);
+ }
+}
+
+/* FIXME: this function does not work */
+static int set_higher_rates(struct moschip_port *mos7720_port,
+ unsigned int baud)
+{
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+ int port_number;
+ enum mos_regs sp_reg;
+ if (mos7720_port == NULL)
+ return -EINVAL;
+
+ port = mos7720_port->port;
+ serial = port->serial;
+
+ /***********************************************
+ * Init Sequence for higher rates
+ ***********************************************/
+ dev_dbg(&port->dev, "Sending Setting Commands ..........\n");
+ port_number = port->port_number;
+
+ write_mos_reg(serial, port_number, IER, 0x00);
+ write_mos_reg(serial, port_number, FCR, 0x00);
+ write_mos_reg(serial, port_number, FCR, 0xcf);
+ mos7720_port->shadowMCR = 0x0b;
+ write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
+ write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x00);
+
+ /***********************************************
+ * Set for higher rates *
+ ***********************************************/
+ /* writing baud rate verbatum into uart clock field clearly not right */
+ if (port_number == 0)
+ sp_reg = SP1_REG;
+ else
+ sp_reg = SP2_REG;
+ write_mos_reg(serial, dummy, sp_reg, baud * 0x10);
+ write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x03);
+ mos7720_port->shadowMCR = 0x2b;
+ write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
+
+ /***********************************************
+ * Set DLL/DLM
+ ***********************************************/
+ mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB;
+ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
+ write_mos_reg(serial, port_number, DLL, 0x01);
+ write_mos_reg(serial, port_number, DLM, 0x00);
+ mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
+ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
+
+ return 0;
+}
+
+/* baud rate information */
+struct divisor_table_entry {
+ __u32 baudrate;
+ __u16 divisor;
+};
+
+/* Define table of divisors for moschip 7720 hardware *
+ * These assume a 3.6864MHz crystal, the standard /16, and *
+ * MCR.7 = 0. */
+static struct divisor_table_entry divisor_table[] = {
+ { 50, 2304},
+ { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
+ { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
+ { 150, 768},
+ { 300, 384},
+ { 600, 192},
+ { 1200, 96},
+ { 1800, 64},
+ { 2400, 48},
+ { 4800, 24},
+ { 7200, 16},
+ { 9600, 12},
+ { 19200, 6},
+ { 38400, 3},
+ { 57600, 2},
+ { 115200, 1},
+};
+
+/*****************************************************************************
+ * calc_baud_rate_divisor
+ * this function calculates the proper baud rate divisor for the specified
+ * baud rate.
+ *****************************************************************************/
+static int calc_baud_rate_divisor(struct usb_serial_port *port, int baudrate, int *divisor)
+{
+ int i;
+ __u16 custom;
+ __u16 round1;
+ __u16 round;
+
+
+ dev_dbg(&port->dev, "%s - %d\n", __func__, baudrate);
+
+ for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
+ if (divisor_table[i].baudrate == baudrate) {
+ *divisor = divisor_table[i].divisor;
+ return 0;
+ }
+ }
+
+ /* After trying for all the standard baud rates *
+ * Try calculating the divisor for this baud rate */
+ if (baudrate > 75 && baudrate < 230400) {
+ /* get the divisor */
+ custom = (__u16)(230400L / baudrate);
+
+ /* Check for round off */
+ round1 = (__u16)(2304000L / baudrate);
+ round = (__u16)(round1 - (custom * 10));
+ if (round > 4)
+ custom++;
+ *divisor = custom;
+
+ dev_dbg(&port->dev, "Baud %d = %d\n", baudrate, custom);
+ return 0;
+ }
+
+ dev_dbg(&port->dev, "Baud calculation Failed...\n");
+ return -EINVAL;
+}
+
+/*
+ * send_cmd_write_baud_rate
+ * this function sends the proper command to change the baud rate of the
+ * specified port.
+ */
+static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
+ int baudrate)
+{
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+ int divisor;
+ int status;
+ unsigned char number;
+
+ if (mos7720_port == NULL)
+ return -1;
+
+ port = mos7720_port->port;
+ serial = port->serial;
+
+ number = port->port_number;
+ dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudrate);
+
+ /* Calculate the Divisor */
+ status = calc_baud_rate_divisor(port, baudrate, &divisor);
+ if (status) {
+ dev_err(&port->dev, "%s - bad baud rate\n", __func__);
+ return status;
+ }
+
+ /* Enable access to divisor latch */
+ mos7720_port->shadowLCR = mos7720_port->shadowLCR | UART_LCR_DLAB;
+ write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR);
+
+ /* Write the divisor */
+ write_mos_reg(serial, number, DLL, (__u8)(divisor & 0xff));
+ write_mos_reg(serial, number, DLM, (__u8)((divisor & 0xff00) >> 8));
+
+ /* Disable access to divisor latch */
+ mos7720_port->shadowLCR = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
+ write_mos_reg(serial, number, LCR, mos7720_port->shadowLCR);
+
+ return status;
+}
+
+/*
+ * change_port_settings
+ * This routine is called to set the UART on the device to match
+ * the specified new settings.
+ */
+static void change_port_settings(struct tty_struct *tty,
+ struct moschip_port *mos7720_port,
+ struct ktermios *old_termios)
+{
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+ int baud;
+ unsigned cflag;
+ unsigned iflag;
+ __u8 mask = 0xff;
+ __u8 lData;
+ __u8 lParity;
+ __u8 lStop;
+ int status;
+ int port_number;
+
+ if (mos7720_port == NULL)
+ return ;
+
+ port = mos7720_port->port;
+ serial = port->serial;
+ port_number = port->port_number;
+
+ if (!mos7720_port->open) {
+ dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+ return;
+ }
+
+ lData = UART_LCR_WLEN8;
+ lStop = 0x00; /* 1 stop bit */
+ lParity = 0x00; /* No parity */
+
+ cflag = tty->termios.c_cflag;
+ iflag = tty->termios.c_iflag;
+
+ /* Change the number of bits */
+ switch (cflag & CSIZE) {
+ case CS5:
+ lData = UART_LCR_WLEN5;
+ mask = 0x1f;
+ break;
+
+ case CS6:
+ lData = UART_LCR_WLEN6;
+ mask = 0x3f;
+ break;
+
+ case CS7:
+ lData = UART_LCR_WLEN7;
+ mask = 0x7f;
+ break;
+ default:
+ case CS8:
+ lData = UART_LCR_WLEN8;
+ break;
+ }
+
+ /* Change the Parity bit */
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ lParity = UART_LCR_PARITY;
+ dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
+ } else {
+ lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
+ 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 = UART_LCR_STOP;
+ dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
+ } else {
+ lStop = 0x00;
+ dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
+ }
+
+#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
+#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
+#define LCR_PAR_MASK 0x38 /* Mask for parity field */
+
+ /* Update the LCR with the correct value */
+ mos7720_port->shadowLCR &=
+ ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
+ mos7720_port->shadowLCR |= (lData | lParity | lStop);
+
+
+ /* Disable Interrupts */
+ write_mos_reg(serial, port_number, IER, 0x00);
+ write_mos_reg(serial, port_number, FCR, 0x00);
+ write_mos_reg(serial, port_number, FCR, 0xcf);
+
+ /* Send the updated LCR value to the mos7720 */
+ write_mos_reg(serial, port_number, LCR, mos7720_port->shadowLCR);
+ mos7720_port->shadowMCR = 0x0b;
+ write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
+
+ /* set up the MCR register and send it to the mos7720 */
+ mos7720_port->shadowMCR = UART_MCR_OUT2;
+ if (cflag & CBAUD)
+ mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
+
+ if (cflag & CRTSCTS) {
+ mos7720_port->shadowMCR |= (UART_MCR_XONANY);
+ /* To set hardware flow control to the specified *
+ * serial port, in SP1/2_CONTROL_REG */
+ if (port_number)
+ write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x01);
+ else
+ write_mos_reg(serial, dummy, SP_CONTROL_REG, 0x02);
+
+ } else
+ mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
+
+ write_mos_reg(serial, port_number, MCR, mos7720_port->shadowMCR);
+
+ /* Determine divisor based on baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (!baud) {
+ /* pick a default, any default... */
+ dev_dbg(&port->dev, "Picked default baud...\n");
+ baud = 9600;
+ }
+
+ if (baud >= 230400) {
+ set_higher_rates(mos7720_port, baud);
+ /* Enable Interrupts */
+ write_mos_reg(serial, port_number, IER, 0x0c);
+ return;
+ }
+
+ dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
+ status = send_cmd_write_baud_rate(mos7720_port, baud);
+ /* FIXME: needs to write actual resulting baud back not just
+ blindly do so */
+ if (cflag & CBAUD)
+ tty_encode_baud_rate(tty, baud, baud);
+ /* Enable Interrupts */
+ write_mos_reg(serial, port_number, IER, 0x0c);
+
+ if (port->read_urb->status != -EINPROGRESS) {
+ status = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (status)
+ dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status);
+ }
+}
+
+/*
+ * mos7720_set_termios
+ * this function is called by the tty driver when it wants to change the
+ * termios structure.
+ */
+static void mos7720_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 *mos7720_port;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+
+ if (mos7720_port == NULL)
+ return;
+
+ if (!mos7720_port->open) {
+ dev_dbg(&port->dev, "%s - port not opened\n", __func__);
+ return;
+ }
+
+ dev_dbg(&port->dev, "setting termios - ASPIRE\n");
+
+ cflag = tty->termios.c_cflag;
+
+ dev_dbg(&port->dev, "%s - cflag %08x iflag %08x\n", __func__,
+ tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
+
+ dev_dbg(&port->dev, "%s - old cflag %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 */
+ change_port_settings(tty, mos7720_port, old_termios);
+
+ if (port->read_urb->status != -EINPROGRESS) {
+ status = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (status)
+ dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status);
+ }
+}
+
+/*
+ * 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 get_lsr_info(struct tty_struct *tty,
+ struct moschip_port *mos7720_port, unsigned int __user *value)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ unsigned int result = 0;
+ unsigned char data = 0;
+ int port_number = port->port_number;
+ int count;
+
+ count = mos7720_chars_in_buffer(tty);
+ if (count == 0) {
+ read_mos_reg(port->serial, port_number, LSR, &data);
+ if ((data & (UART_LSR_TEMT | UART_LSR_THRE))
+ == (UART_LSR_TEMT | UART_LSR_THRE)) {
+ dev_dbg(&port->dev, "%s -- Empty\n", __func__);
+ result = TIOCSER_TEMT;
+ }
+ }
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+static int mos7720_tiocmget(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
+ unsigned int result = 0;
+ unsigned int mcr ;
+ unsigned int msr ;
+
+ mcr = mos7720_port->shadowMCR;
+ msr = mos7720_port->shadowMSR;
+
+ result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
+ | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
+ | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
+ | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */
+ | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
+ | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
+
+ return result;
+}
+
+static int mos7720_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
+ unsigned int mcr ;
+
+ mcr = mos7720_port->shadowMCR;
+
+ if (set & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (set & TIOCM_DTR)
+ mcr |= UART_MCR_DTR;
+ if (set & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+
+ if (clear & TIOCM_RTS)
+ mcr &= ~UART_MCR_RTS;
+ if (clear & TIOCM_DTR)
+ mcr &= ~UART_MCR_DTR;
+ if (clear & TIOCM_LOOP)
+ mcr &= ~UART_MCR_LOOP;
+
+ mos7720_port->shadowMCR = mcr;
+ write_mos_reg(port->serial, port->port_number, MCR,
+ mos7720_port->shadowMCR);
+
+ return 0;
+}
+
+static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
+ unsigned int __user *value)
+{
+ unsigned int mcr;
+ unsigned int arg;
+
+ struct usb_serial_port *port;
+
+ if (mos7720_port == NULL)
+ return -1;
+
+ port = (struct usb_serial_port *)mos7720_port->port;
+ mcr = mos7720_port->shadowMCR;
+
+ if (copy_from_user(&arg, value, sizeof(int)))
+ return -EFAULT;
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (arg & TIOCM_DTR)
+ mcr |= UART_MCR_RTS;
+ if (arg & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+ break;
+
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS)
+ mcr &= ~UART_MCR_RTS;
+ if (arg & TIOCM_DTR)
+ mcr &= ~UART_MCR_RTS;
+ if (arg & TIOCM_LOOP)
+ mcr &= ~UART_MCR_LOOP;
+ break;
+
+ }
+
+ mos7720_port->shadowMCR = mcr;
+ write_mos_reg(port->serial, port->port_number, MCR,
+ mos7720_port->shadowMCR);
+
+ return 0;
+}
+
+static int get_serial_info(struct moschip_port *mos7720_port,
+ struct serial_struct __user *retinfo)
+{
+ struct serial_struct tmp;
+
+ if (!retinfo)
+ return -EFAULT;
+
+ memset(&tmp, 0, sizeof(tmp));
+
+ tmp.type = PORT_16550A;
+ tmp.line = mos7720_port->port->minor;
+ tmp.port = mos7720_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;
+}
+
+static int mos7720_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return -ENODEV;
+
+ switch (cmd) {
+ case TIOCSERGETLSR:
+ dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
+ return get_lsr_info(tty, mos7720_port,
+ (unsigned int __user *)arg);
+
+ /* FIXME: These should be using the mode methods */
+ case TIOCMBIS:
+ case TIOCMBIC:
+ dev_dbg(&port->dev, "%s TIOCMSET/TIOCMBIC/TIOCMSET\n", __func__);
+ return set_modem_info(mos7720_port, cmd,
+ (unsigned int __user *)arg);
+
+ case TIOCGSERIAL:
+ dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
+ return get_serial_info(mos7720_port,
+ (struct serial_struct __user *)arg);
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static int mos7720_startup(struct usb_serial *serial)
+{
+ struct usb_device *dev;
+ char data;
+ u16 product;
+ int ret_val;
+
+ product = le16_to_cpu(serial->dev->descriptor.idProduct);
+ dev = serial->dev;
+
+ /*
+ * The 7715 uses the first bulk in/out endpoint pair for the parallel
+ * port, and the second for the serial port. Because the usbserial core
+ * assumes both pairs are serial ports, we must engage in a bit of
+ * subterfuge and swap the pointers for ports 0 and 1 in order to make
+ * port 0 point to the serial port. However, both moschip devices use a
+ * single interrupt-in endpoint for both ports (as mentioned a little
+ * further down), and this endpoint was assigned to port 0. So after
+ * the swap, we must copy the interrupt endpoint elements from port 1
+ * (as newly assigned) to port 0, and null out port 1 pointers.
+ */
+ if (product == MOSCHIP_DEVICE_ID_7715) {
+ struct usb_serial_port *tmp = serial->port[0];
+ serial->port[0] = serial->port[1];
+ serial->port[1] = tmp;
+ serial->port[0]->interrupt_in_urb = tmp->interrupt_in_urb;
+ serial->port[0]->interrupt_in_buffer = tmp->interrupt_in_buffer;
+ serial->port[0]->interrupt_in_endpointAddress =
+ tmp->interrupt_in_endpointAddress;
+ serial->port[1]->interrupt_in_urb = NULL;
+ serial->port[1]->interrupt_in_buffer = NULL;
+ }
+
+ /* setting configuration feature to one */
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ (__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000);
+
+ /* start the interrupt urb */
+ ret_val = usb_submit_urb(serial->port[0]->interrupt_in_urb, GFP_KERNEL);
+ if (ret_val)
+ dev_err(&dev->dev,
+ "%s - Error %d submitting control urb\n",
+ __func__, ret_val);
+
+#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
+ if (product == MOSCHIP_DEVICE_ID_7715) {
+ ret_val = mos7715_parport_init(serial);
+ if (ret_val < 0)
+ return ret_val;
+ }
+#endif
+ /* LSR For Port 1 */
+ read_mos_reg(serial, 0, LSR, &data);
+ dev_dbg(&dev->dev, "LSR:%x\n", data);
+
+ return 0;
+}
+
+static void mos7720_release(struct usb_serial *serial)
+{
+#ifdef CONFIG_USB_SERIAL_MOS7715_PARPORT
+ /* close the parallel port */
+
+ if (le16_to_cpu(serial->dev->descriptor.idProduct)
+ == MOSCHIP_DEVICE_ID_7715) {
+ struct urbtracker *urbtrack;
+ unsigned long flags;
+ struct mos7715_parport *mos_parport =
+ usb_get_serial_data(serial);
+
+ /* prevent NULL ptr dereference in port callbacks */
+ spin_lock(&release_lock);
+ mos_parport->pp->private_data = NULL;
+ spin_unlock(&release_lock);
+
+ /* wait for synchronous usb calls to return */
+ if (mos_parport->msg_pending)
+ wait_for_completion_timeout(&mos_parport->syncmsg_compl,
+ msecs_to_jiffies(MOS_WDR_TIMEOUT));
+
+ parport_remove_port(mos_parport->pp);
+ usb_set_serial_data(serial, NULL);
+ mos_parport->serial = NULL;
+
+ /* if tasklet currently scheduled, wait for it to complete */
+ tasklet_kill(&mos_parport->urb_tasklet);
+
+ /* unlink any urbs sent by the tasklet */
+ spin_lock_irqsave(&mos_parport->listlock, flags);
+ list_for_each_entry(urbtrack,
+ &mos_parport->active_urbs,
+ urblist_entry)
+ usb_unlink_urb(urbtrack->urb);
+ spin_unlock_irqrestore(&mos_parport->listlock, flags);
+
+ kref_put(&mos_parport->ref_count, destroy_mos_parport);
+ }
+#endif
+}
+
+static int mos7720_port_probe(struct usb_serial_port *port)
+{
+ struct moschip_port *mos7720_port;
+
+ mos7720_port = kzalloc(sizeof(*mos7720_port), GFP_KERNEL);
+ if (!mos7720_port)
+ return -ENOMEM;
+
+ /* Initialize all port interrupt end point to port 0 int endpoint.
+ * Our device has only one interrupt endpoint common to all ports.
+ */
+ port->interrupt_in_endpointAddress =
+ port->serial->port[0]->interrupt_in_endpointAddress;
+ mos7720_port->port = port;
+
+ usb_set_serial_port_data(port, mos7720_port);
+
+ return 0;
+}
+
+static int mos7720_port_remove(struct usb_serial_port *port)
+{
+ struct moschip_port *mos7720_port;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ kfree(mos7720_port);
+
+ return 0;
+}
+
+static struct usb_serial_driver moschip7720_2port_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "moschip7720",
+ },
+ .description = "Moschip 2 port adapter",
+ .id_table = id_table,
+ .calc_num_ports = mos77xx_calc_num_ports,
+ .open = mos7720_open,
+ .close = mos7720_close,
+ .throttle = mos7720_throttle,
+ .unthrottle = mos7720_unthrottle,
+ .probe = mos77xx_probe,
+ .attach = mos7720_startup,
+ .release = mos7720_release,
+ .port_probe = mos7720_port_probe,
+ .port_remove = mos7720_port_remove,
+ .ioctl = mos7720_ioctl,
+ .tiocmget = mos7720_tiocmget,
+ .tiocmset = mos7720_tiocmset,
+ .set_termios = mos7720_set_termios,
+ .write = mos7720_write,
+ .write_room = mos7720_write_room,
+ .chars_in_buffer = mos7720_chars_in_buffer,
+ .break_ctl = mos7720_break,
+ .read_bulk_callback = mos7720_bulk_in_callback,
+ .read_int_callback = NULL /* dynamically assigned in probe() */
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+ &moschip7720_2port_driver, NULL
+};
+
+module_usb_serial_driver(serial_drivers, id_table);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff