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android_kernel_xiaomi_sm8350/drivers/usb/serial/visor.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* USB HandSpring Visor, Palm m50x, and Sony Clie driver
* (supports all of the Palm OS USB devices)
*
* Copyright (C) 1999 - 2004
* Greg Kroah-Hartman (greg@kroah.com)
*
* 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.
*
* See Documentation/usb/usb-serial.txt for more information on using this driver
*
*/
#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/moduleparam.h>
#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include "visor.h"
/*
* Version Information
*/
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
#define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"
/* function prototypes for a handspring visor */
static int visor_open (struct usb_serial_port *port, struct file *filp);
static void visor_close (struct usb_serial_port *port, struct file *filp);
static int visor_write (struct usb_serial_port *port, const unsigned char *buf, int count);
static int visor_write_room (struct usb_serial_port *port);
static int visor_chars_in_buffer (struct usb_serial_port *port);
static void visor_throttle (struct usb_serial_port *port);
static void visor_unthrottle (struct usb_serial_port *port);
static int visor_probe (struct usb_serial *serial, const struct usb_device_id *id);
static int visor_calc_num_ports(struct usb_serial *serial);
static void visor_shutdown (struct usb_serial *serial);
static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios);
static void visor_write_bulk_callback (struct urb *urb);
static void visor_read_bulk_callback (struct urb *urb);
static void visor_read_int_callback (struct urb *urb);
static int clie_3_5_startup (struct usb_serial *serial);
static int treo_attach (struct usb_serial *serial);
static int clie_5_attach (struct usb_serial *serial);
static int palm_os_3_probe (struct usb_serial *serial, const struct usb_device_id *id);
static int palm_os_4_probe (struct usb_serial *serial, const struct usb_device_id *id);
/* Parameters that may be passed into the module. */
static int debug;
static __u16 vendor;
static __u16 product;
static struct usb_device_id id_table [] = {
{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
.driver_info = (kernel_ulong_t)&palm_os_3_probe },
{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ }, /* optional parameter entry */
{ } /* Terminating entry */
};
static struct usb_device_id clie_id_5_table [] = {
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
.driver_info = (kernel_ulong_t)&palm_os_4_probe },
{ }, /* optional parameter entry */
{ } /* Terminating entry */
};
static struct usb_device_id clie_id_3_5_table [] = {
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
{ } /* Terminating entry */
};
static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
{ USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
{ USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE31_ID) },
{ USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
{ USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
{ USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
{ USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
{ USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
{ USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
{ USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
{ }, /* optional parameter entry */
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, id_table_combined);
static struct usb_driver visor_driver = {
.name = "visor",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table_combined,
.no_dynamic_id = 1,
};
/* All of the device info needed for the Handspring Visor, and Palm 4.0 devices */
static struct usb_serial_driver handspring_device = {
.driver = {
.owner = THIS_MODULE,
.name = "visor",
},
.description = "Handspring Visor / Palm OS",
.id_table = id_table,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = 2,
.num_bulk_out = 2,
.num_ports = 2,
.open = visor_open,
.close = visor_close,
.throttle = visor_throttle,
.unthrottle = visor_unthrottle,
.attach = treo_attach,
.probe = visor_probe,
.calc_num_ports = visor_calc_num_ports,
.shutdown = visor_shutdown,
.ioctl = visor_ioctl,
.set_termios = visor_set_termios,
.write = visor_write,
.write_room = visor_write_room,
.chars_in_buffer = visor_chars_in_buffer,
.write_bulk_callback = visor_write_bulk_callback,
.read_bulk_callback = visor_read_bulk_callback,
.read_int_callback = visor_read_int_callback,
};
/* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
static struct usb_serial_driver clie_5_device = {
.driver = {
.owner = THIS_MODULE,
.name = "clie_5",
},
.description = "Sony Clie 5.0",
.id_table = clie_id_5_table,
.num_interrupt_in = NUM_DONT_CARE,
.num_bulk_in = 2,
.num_bulk_out = 2,
.num_ports = 2,
.open = visor_open,
.close = visor_close,
.throttle = visor_throttle,
.unthrottle = visor_unthrottle,
.attach = clie_5_attach,
.probe = visor_probe,
.calc_num_ports = visor_calc_num_ports,
.shutdown = visor_shutdown,
.ioctl = visor_ioctl,
.set_termios = visor_set_termios,
.write = visor_write,
.write_room = visor_write_room,
.chars_in_buffer = visor_chars_in_buffer,
.write_bulk_callback = visor_write_bulk_callback,
.read_bulk_callback = visor_read_bulk_callback,
.read_int_callback = visor_read_int_callback,
};
/* device info for the Sony Clie OS version 3.5 */
static struct usb_serial_driver clie_3_5_device = {
.driver = {
.owner = THIS_MODULE,
.name = "clie_3.5",
},
.description = "Sony Clie 3.5",
.id_table = clie_id_3_5_table,
.num_interrupt_in = 0,
.num_bulk_in = 1,
.num_bulk_out = 1,
.num_ports = 1,
.open = visor_open,
.close = visor_close,
.throttle = visor_throttle,
.unthrottle = visor_unthrottle,
.attach = clie_3_5_startup,
.ioctl = visor_ioctl,
.set_termios = visor_set_termios,
.write = visor_write,
.write_room = visor_write_room,
.chars_in_buffer = visor_chars_in_buffer,
.write_bulk_callback = visor_write_bulk_callback,
.read_bulk_callback = visor_read_bulk_callback,
};
struct visor_private {
spinlock_t lock;
int bytes_in;
int bytes_out;
int outstanding_urbs;
int throttled;
};
/* number of outstanding urbs to prevent userspace DoS from happening */
#define URB_UPPER_LIMIT 42
static int stats;
/******************************************************************************
* Handspring Visor specific driver functions
******************************************************************************/
static int visor_open (struct usb_serial_port *port, struct file *filp)
{
struct usb_serial *serial = port->serial;
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
int result = 0;
dbg("%s - port %d", __FUNCTION__, port->number);
if (!port->read_urb) {
/* this is needed for some brain dead Sony devices */
dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
return -ENODEV;
}
spin_lock_irqsave(&priv->lock, flags);
priv->bytes_in = 0;
priv->bytes_out = 0;
priv->throttled = 0;
spin_unlock_irqrestore(&priv->lock, flags);
/*
* Force low_latency on so that our tty_push actually forces the data
* through, otherwise it is scheduled, and with high data rates (like
* with OHCI) data can get lost.
*/
if (port->tty)
port->tty->low_latency = 1;
/* Start reading from the device */
usb_fill_bulk_urb (port->read_urb, serial->dev,
usb_rcvbulkpipe (serial->dev,
port->bulk_in_endpointAddress),
port->read_urb->transfer_buffer,
port->read_urb->transfer_buffer_length,
visor_read_bulk_callback, port);
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (result) {
dev_err(&port->dev, "%s - failed submitting read urb, error %d\n",
__FUNCTION__, result);
goto exit;
}
if (port->interrupt_in_urb) {
dbg("%s - adding interrupt input for treo", __FUNCTION__);
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
if (result)
dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n",
__FUNCTION__, result);
}
exit:
return result;
}
static void visor_close (struct usb_serial_port *port, struct file * filp)
{
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned char *transfer_buffer;
dbg("%s - port %d", __FUNCTION__, port->number);
/* shutdown our urbs */
usb_kill_urb(port->read_urb);
if (port->interrupt_in_urb)
usb_kill_urb(port->interrupt_in_urb);
/* Try to send shutdown message, if the device is gone, this will just fail. */
transfer_buffer = kmalloc (0x12, GFP_KERNEL);
if (transfer_buffer) {
usb_control_msg (port->serial->dev,
usb_rcvctrlpipe(port->serial->dev, 0),
VISOR_CLOSE_NOTIFICATION, 0xc2,
0x0000, 0x0000,
transfer_buffer, 0x12, 300);
kfree (transfer_buffer);
}
if (stats)
dev_info(&port->dev, "Bytes In = %d Bytes Out = %d\n",
priv->bytes_in, priv->bytes_out);
}
static int visor_write (struct usb_serial_port *port, const unsigned char *buf, int count)
{
struct visor_private *priv = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
struct urb *urb;
unsigned char *buffer;
unsigned long flags;
int status;
dbg("%s - port %d", __FUNCTION__, port->number);
spin_lock_irqsave(&priv->lock, flags);
if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
spin_unlock_irqrestore(&priv->lock, flags);
dbg("%s - write limit hit\n", __FUNCTION__);
return 0;
}
spin_unlock_irqrestore(&priv->lock, flags);
buffer = kmalloc (count, GFP_ATOMIC);
if (!buffer) {
dev_err(&port->dev, "out of memory\n");
return -ENOMEM;
}
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
dev_err(&port->dev, "no more free urbs\n");
kfree (buffer);
return -ENOMEM;
}
memcpy (buffer, buf, count);
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer);
usb_fill_bulk_urb (urb, serial->dev,
usb_sndbulkpipe (serial->dev,
port->bulk_out_endpointAddress),
buffer, count,
visor_write_bulk_callback, port);
/* send it down the pipe */
status = usb_submit_urb(urb, GFP_ATOMIC);
if (status) {
dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n",
__FUNCTION__, status);
count = status;
kfree (buffer);
} else {
spin_lock_irqsave(&priv->lock, flags);
++priv->outstanding_urbs;
priv->bytes_out += count;
spin_unlock_irqrestore(&priv->lock, flags);
}
/* we are done with this urb, so let the host driver
* really free it when it is finished with it */
usb_free_urb (urb);
return count;
}
static int visor_write_room (struct usb_serial_port *port)
{
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
/*
* We really can take anything the user throws at us
* but let's pick a nice big number to tell the tty
* layer that we have lots of free space, unless we don't.
*/
spin_lock_irqsave(&priv->lock, flags);
if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
spin_unlock_irqrestore(&priv->lock, flags);
dbg("%s - write limit hit\n", __FUNCTION__);
return 0;
}
spin_unlock_irqrestore(&priv->lock, flags);
return 2048;
}
static int visor_chars_in_buffer (struct usb_serial_port *port)
{
dbg("%s - port %d", __FUNCTION__, port->number);
/*
* We can't really account for how much data we
* have sent out, but hasn't made it through to the
* device, so just tell the tty layer that everything
* is flushed.
*/
return 0;
}
static void visor_write_bulk_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
/* free up the transfer buffer, as usb_free_urb() does not do this */
kfree (urb->transfer_buffer);
dbg("%s - port %d", __FUNCTION__, port->number);
if (urb->status)
dbg("%s - nonzero write bulk status received: %d",
__FUNCTION__, urb->status);
spin_lock_irqsave(&priv->lock, flags);
--priv->outstanding_urbs;
spin_unlock_irqrestore(&priv->lock, flags);
usb_serial_port_softint(port);
}
static void visor_read_bulk_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned char *data = urb->transfer_buffer;
struct tty_struct *tty;
unsigned long flags;
int throttled;
int result;
dbg("%s - port %d", __FUNCTION__, port->number);
if (urb->status) {
dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
return;
}
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
tty = port->tty;
if (tty && urb->actual_length) {
tty_buffer_request_room(tty, urb->actual_length);
tty_insert_flip_string(tty, data, urb->actual_length);
tty_flip_buffer_push(tty);
}
spin_lock_irqsave(&priv->lock, flags);
priv->bytes_in += urb->actual_length;
throttled = priv->throttled;
spin_unlock_irqrestore(&priv->lock, flags);
/* Continue trying to always read if we should */
if (!throttled) {
usb_fill_bulk_urb (port->read_urb, port->serial->dev,
usb_rcvbulkpipe(port->serial->dev,
port->bulk_in_endpointAddress),
port->read_urb->transfer_buffer,
port->read_urb->transfer_buffer_length,
visor_read_bulk_callback, port);
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
if (result)
dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
}
return;
}
static void visor_read_int_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
int result;
switch (urb->status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__FUNCTION__, urb->status);
return;
default:
dbg("%s - nonzero urb status received: %d",
__FUNCTION__, urb->status);
goto exit;
}
/*
* This information is still unknown what it can be used for.
* If anyone has an idea, please let the author know...
*
* Rumor has it this endpoint is used to notify when data
* is ready to be read from the bulk ones.
*/
usb_serial_debug_data(debug, &port->dev, __FUNCTION__,
urb->actual_length, urb->transfer_buffer);
exit:
result = usb_submit_urb (urb, GFP_ATOMIC);
if (result)
dev_err(&urb->dev->dev, "%s - Error %d submitting interrupt urb\n",
__FUNCTION__, result);
}
static void visor_throttle (struct usb_serial_port *port)
{
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
spin_lock_irqsave(&priv->lock, flags);
priv->throttled = 1;
spin_unlock_irqrestore(&priv->lock, flags);
}
static void visor_unthrottle (struct usb_serial_port *port)
{
struct visor_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
int result;
dbg("%s - port %d", __FUNCTION__, port->number);
spin_lock_irqsave(&priv->lock, flags);
priv->throttled = 0;
spin_unlock_irqrestore(&priv->lock, flags);
port->read_urb->dev = port->serial->dev;
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
if (result)
dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
}
static int palm_os_3_probe (struct usb_serial *serial, const struct usb_device_id *id)
{
struct device *dev = &serial->dev->dev;
struct visor_connection_info *connection_info;
unsigned char *transfer_buffer;
char *string;
int retval = 0;
int i;
int num_ports = 0;
dbg("%s", __FUNCTION__);
transfer_buffer = kmalloc (sizeof (*connection_info), GFP_KERNEL);
if (!transfer_buffer) {
dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __FUNCTION__,
sizeof(*connection_info));
return -ENOMEM;
}
/* send a get connection info request */
retval = usb_control_msg (serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
VISOR_GET_CONNECTION_INFORMATION,
0xc2, 0x0000, 0x0000, transfer_buffer,
sizeof(*connection_info), 300);
if (retval < 0) {
dev_err(dev, "%s - error %d getting connection information\n",
__FUNCTION__, retval);
goto exit;
}
if (retval == sizeof(*connection_info)) {
connection_info = (struct visor_connection_info *)transfer_buffer;
num_ports = le16_to_cpu(connection_info->num_ports);
for (i = 0; i < num_ports; ++i) {
switch (connection_info->connections[i].port_function_id) {
case VISOR_FUNCTION_GENERIC:
string = "Generic";
break;
case VISOR_FUNCTION_DEBUGGER:
string = "Debugger";
break;
case VISOR_FUNCTION_HOTSYNC:
string = "HotSync";
break;
case VISOR_FUNCTION_CONSOLE:
string = "Console";
break;
case VISOR_FUNCTION_REMOTE_FILE_SYS:
string = "Remote File System";
break;
default:
string = "unknown";
break;
}
dev_info(dev, "%s: port %d, is for %s use\n",
serial->type->description,
connection_info->connections[i].port, string);
}
}
/*
* Handle devices that report invalid stuff here.
*/
if (num_ports == 0 || num_ports > 2) {
dev_warn (dev, "%s: No valid connect info available\n",
serial->type->description);
num_ports = 2;
}
dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
num_ports);
/*
* save off our num_ports info so that we can use it in the
* calc_num_ports callback
*/
usb_set_serial_data(serial, (void *)(long)num_ports);
/* ask for the number of bytes available, but ignore the response as it is broken */
retval = usb_control_msg (serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
VISOR_REQUEST_BYTES_AVAILABLE,
0xc2, 0x0000, 0x0005, transfer_buffer,
0x02, 300);
if (retval < 0)
dev_err(dev, "%s - error %d getting bytes available request\n",
__FUNCTION__, retval);
retval = 0;
exit:
kfree (transfer_buffer);
return retval;
}
static int palm_os_4_probe (struct usb_serial *serial, const struct usb_device_id *id)
{
struct device *dev = &serial->dev->dev;
struct palm_ext_connection_info *connection_info;
unsigned char *transfer_buffer;
int retval;
dbg("%s", __FUNCTION__);
transfer_buffer = kmalloc (sizeof (*connection_info), GFP_KERNEL);
if (!transfer_buffer) {
dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __FUNCTION__,
sizeof(*connection_info));
return -ENOMEM;
}
retval = usb_control_msg (serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
PALM_GET_EXT_CONNECTION_INFORMATION,
0xc2, 0x0000, 0x0000, transfer_buffer,
sizeof (*connection_info), 300);
if (retval < 0)
dev_err(dev, "%s - error %d getting connection info\n",
__FUNCTION__, retval);
else
usb_serial_debug_data(debug, &serial->dev->dev, __FUNCTION__,
retval, transfer_buffer);
kfree (transfer_buffer);
return 0;
}
static int visor_probe (struct usb_serial *serial, const struct usb_device_id *id)
{
int retval = 0;
int (*startup) (struct usb_serial *serial, const struct usb_device_id *id);
dbg("%s", __FUNCTION__);
if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
err("active config #%d != 1 ??",
serial->dev->actconfig->desc.bConfigurationValue);
return -ENODEV;
}
if (id->driver_info) {
startup = (void *)id->driver_info;
retval = startup(serial, id);
}
return retval;
}
static int visor_calc_num_ports (struct usb_serial *serial)
{
int num_ports = (int)(long)(usb_get_serial_data(serial));
if (num_ports)
usb_set_serial_data(serial, NULL);
return num_ports;
}
static int generic_startup(struct usb_serial *serial)
{
struct usb_serial_port **ports = serial->port;
struct visor_private *priv;
int i;
for (i = 0; i < serial->num_ports; ++i) {
priv = kzalloc (sizeof(*priv), GFP_KERNEL);
if (!priv) {
while (i-- != 0) {
priv = usb_get_serial_port_data(ports[i]);
usb_set_serial_port_data(ports[i], NULL);
kfree(priv);
}
return -ENOMEM;
}
spin_lock_init(&priv->lock);
usb_set_serial_port_data(ports[i], priv);
}
return 0;
}
static int clie_3_5_startup (struct usb_serial *serial)
{
struct device *dev = &serial->dev->dev;
int result;
u8 data;
dbg("%s", __FUNCTION__);
/*
* Note that PEG-300 series devices expect the following two calls.
*/
/* get the config number */
result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0),
USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
0, 0, &data, 1, 3000);
if (result < 0) {
dev_err(dev, "%s: get config number failed: %d\n", __FUNCTION__, result);
return result;
}
if (result != 1) {
dev_err(dev, "%s: get config number bad return length: %d\n", __FUNCTION__, result);
return -EIO;
}
/* get the interface number */
result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0),
USB_REQ_GET_INTERFACE,
USB_DIR_IN | USB_RECIP_INTERFACE,
0, 0, &data, 1, 3000);
if (result < 0) {
dev_err(dev, "%s: get interface number failed: %d\n", __FUNCTION__, result);
return result;
}
if (result != 1) {
dev_err(dev, "%s: get interface number bad return length: %d\n", __FUNCTION__, result);
return -EIO;
}
return generic_startup(serial);
}
static int treo_attach (struct usb_serial *serial)
{
struct usb_serial_port *swap_port;
/* Only do this endpoint hack for the Handspring devices with
* interrupt in endpoints, which for now are the Treo devices. */
if (!((le16_to_cpu(serial->dev->descriptor.idVendor) == HANDSPRING_VENDOR_ID) ||
(le16_to_cpu(serial->dev->descriptor.idVendor) == KYOCERA_VENDOR_ID)) ||
(serial->num_interrupt_in == 0))
goto generic_startup;
dbg("%s", __FUNCTION__);
/*
* It appears that Treos and Kyoceras want to use the
* 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
* so let's swap the 1st and 2nd bulk in and interrupt endpoints.
* Note that swapping the bulk out endpoints would break lots of
* apps that want to communicate on the second port.
*/
#define COPY_PORT(dest, src) \
dest->read_urb = src->read_urb; \
dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress; \
dest->bulk_in_buffer = src->bulk_in_buffer; \
dest->interrupt_in_urb = src->interrupt_in_urb; \
dest->interrupt_in_endpointAddress = src->interrupt_in_endpointAddress; \
dest->interrupt_in_buffer = src->interrupt_in_buffer;
swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
if (!swap_port)
return -ENOMEM;
COPY_PORT(swap_port, serial->port[0]);
COPY_PORT(serial->port[0], serial->port[1]);
COPY_PORT(serial->port[1], swap_port);
kfree(swap_port);
generic_startup:
return generic_startup(serial);
}
static int clie_5_attach (struct usb_serial *serial)
{
dbg("%s", __FUNCTION__);
/* TH55 registers 2 ports.
Communication in from the UX50/TH55 uses bulk_in_endpointAddress from port 0
Communication out to the UX50/TH55 uses bulk_out_endpointAddress from port 1
Lets do a quick and dirty mapping
*/
/* some sanity check */
if (serial->num_ports < 2)
return -1;
/* port 0 now uses the modified endpoint Address */
serial->port[0]->bulk_out_endpointAddress = serial->port[1]->bulk_out_endpointAddress;
return generic_startup(serial);
}
static void visor_shutdown (struct usb_serial *serial)
{
struct visor_private *priv;
int i;
dbg("%s", __FUNCTION__);
for (i = 0; i < serial->num_ports; i++) {
priv = usb_get_serial_port_data(serial->port[i]);
if (priv) {
usb_set_serial_port_data(serial->port[i], NULL);
kfree(priv);
}
}
}
static int visor_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
{
dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
return -ENOIOCTLCMD;
}
/* This function is all nice and good, but we don't change anything based on it :) */
static void visor_set_termios (struct usb_serial_port *port, struct termios *old_termios)
{
unsigned int cflag;
dbg("%s - port %d", __FUNCTION__, port->number);
if ((!port->tty) || (!port->tty->termios)) {
dbg("%s - no tty structures", __FUNCTION__);
return;
}
cflag = port->tty->termios->c_cflag;
/* check that they really want us to change something */
if (old_termios) {
if ((cflag == old_termios->c_cflag) &&
(RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
dbg("%s - nothing to change...", __FUNCTION__);
return;
}
}
/* get the byte size */
switch (cflag & CSIZE) {
case CS5: dbg("%s - data bits = 5", __FUNCTION__); break;
case CS6: dbg("%s - data bits = 6", __FUNCTION__); break;
case CS7: dbg("%s - data bits = 7", __FUNCTION__); break;
default:
case CS8: dbg("%s - data bits = 8", __FUNCTION__); break;
}
/* determine the parity */
if (cflag & PARENB)
if (cflag & PARODD)
dbg("%s - parity = odd", __FUNCTION__);
else
dbg("%s - parity = even", __FUNCTION__);
else
dbg("%s - parity = none", __FUNCTION__);
/* figure out the stop bits requested */
if (cflag & CSTOPB)
dbg("%s - stop bits = 2", __FUNCTION__);
else
dbg("%s - stop bits = 1", __FUNCTION__);
/* figure out the flow control settings */
if (cflag & CRTSCTS)
dbg("%s - RTS/CTS is enabled", __FUNCTION__);
else
dbg("%s - RTS/CTS is disabled", __FUNCTION__);
/* determine software flow control */
if (I_IXOFF(port->tty))
dbg("%s - XON/XOFF is enabled, XON = %2x, XOFF = %2x",
__FUNCTION__, START_CHAR(port->tty), STOP_CHAR(port->tty));
else
dbg("%s - XON/XOFF is disabled", __FUNCTION__);
/* get the baud rate wanted */
dbg("%s - baud rate = %d", __FUNCTION__, tty_get_baud_rate(port->tty));
return;
}
static int __init visor_init (void)
{
int i, retval;
/* Only if parameters were passed to us */
if ((vendor>0) && (product>0)) {
struct usb_device_id usb_dev_temp[]=
{{USB_DEVICE(vendor, product),
.driver_info = (kernel_ulong_t)&palm_os_4_probe }};
/* Find the last entry in id_table */
for (i=0; ; i++) {
if (id_table[i].idVendor==0) {
id_table[i] = usb_dev_temp[0];
break;
}
}
/* Find the last entry in id_table_combined */
for (i=0; ; i++) {
if (id_table_combined[i].idVendor==0) {
id_table_combined[i] = usb_dev_temp[0];
break;
}
}
info("Untested USB device specified at time of module insertion");
info("Warning: This is not guaranteed to work");
info("Using a newer kernel is preferred to this method");
info("Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x",
vendor, product);
}
retval = usb_serial_register(&handspring_device);
if (retval)
goto failed_handspring_register;
retval = usb_serial_register(&clie_3_5_device);
if (retval)
goto failed_clie_3_5_register;
retval = usb_serial_register(&clie_5_device);
if (retval)
goto failed_clie_5_register;
retval = usb_register(&visor_driver);
if (retval)
goto failed_usb_register;
info(DRIVER_DESC);
return 0;
failed_usb_register:
usb_serial_deregister(&clie_5_device);
failed_clie_5_register:
usb_serial_deregister(&clie_3_5_device);
failed_clie_3_5_register:
usb_serial_deregister(&handspring_device);
failed_handspring_register:
return retval;
}
static void __exit visor_exit (void)
{
usb_deregister (&visor_driver);
usb_serial_deregister (&handspring_device);
usb_serial_deregister (&clie_3_5_device);
usb_serial_deregister (&clie_5_device);
}
module_init(visor_init);
module_exit(visor_exit);
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
module_param(stats, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(stats, "Enables statistics or not");
module_param(vendor, ushort, 0);
MODULE_PARM_DESC(vendor, "User specified vendor ID");
module_param(product, ushort, 0);
MODULE_PARM_DESC(product, "User specified product ID");
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