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linux-loongson/drivers/usb/serial/io_ti.c
Matthew Wilcox d3135846f6 drivers: Remove unnecessary inclusions of asm/semaphore.h 
None of these files use any of the functionality promised by
asm/semaphore.h.  It's possible that they rely on it dragging in some
unrelated header file, but I can't build all these files, so we'll have
fix any build failures as they come up.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
2008-04-18 22:16:32 -04:00

3140 lines
85 KiB
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Raw Blame History

/*
* Edgeport USB Serial Converter driver
*
* Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
* Copyright (C) 2001-2002 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, or
* (at your option) any later version.
*
* Supports the following devices:
* EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
*
* For questions or problems with this driver, contact Inside Out
* Networks technical support, or Peter Berger <pberger@brimson.com>,
* or Al Borchers <alborchers@steinerpoint.com>.
*
* Version history:
*
* July 11, 2002 Removed 4 port device structure since all TI UMP
* chips have only 2 ports
* David Iacovelli (davidi@ionetworks.com)
*
*/
#include <linux/kernel.h>
#include <linux/jiffies.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/mutex.h>
#include <linux/serial.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include "io_16654.h"
#include "io_usbvend.h"
#include "io_ti.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v0.7mode043006"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
#define DRIVER_DESC "Edgeport USB Serial Driver"
/* firmware image code */
#define IMAGE_VERSION_NAME PagableOperationalCodeImageVersion
#define IMAGE_ARRAY_NAME PagableOperationalCodeImage
#define IMAGE_SIZE PagableOperationalCodeSize
#include "io_fw_down3.h" /* Define array OperationalCodeImage[] */
#define EPROM_PAGE_SIZE 64
struct edgeport_uart_buf_desc {
__u32 count; // Number of bytes currently in buffer
};
/* different hardware types */
#define HARDWARE_TYPE_930 0
#define HARDWARE_TYPE_TIUMP 1
// IOCTL_PRIVATE_TI_GET_MODE Definitions
#define TI_MODE_CONFIGURING 0 // Device has not entered start device
#define TI_MODE_BOOT 1 // Staying in boot mode
#define TI_MODE_DOWNLOAD 2 // Made it to download mode
#define TI_MODE_TRANSITIONING 3 // Currently in boot mode but transitioning to download mode
/* read urb state */
#define EDGE_READ_URB_RUNNING 0
#define EDGE_READ_URB_STOPPING 1
#define EDGE_READ_URB_STOPPED 2
#define EDGE_LOW_LATENCY 1
#define EDGE_CLOSING_WAIT 4000 /* in .01 sec */
#define EDGE_OUT_BUF_SIZE 1024
/* Product information read from the Edgeport */
struct product_info
{
int TiMode; // Current TI Mode
__u8 hardware_type; // Type of hardware
} __attribute__((packed));
/* circular buffer */
struct edge_buf {
unsigned int buf_size;
char *buf_buf;
char *buf_get;
char *buf_put;
};
struct edgeport_port {
__u16 uart_base;
__u16 dma_address;
__u8 shadow_msr;
__u8 shadow_mcr;
__u8 shadow_lsr;
__u8 lsr_mask;
__u32 ump_read_timeout; /* Number of miliseconds the UMP will
wait without data before completing
a read short */
int baud_rate;
int close_pending;
int lsr_event;
struct edgeport_uart_buf_desc tx;
struct async_icount icount;
wait_queue_head_t delta_msr_wait; /* for handling sleeping while
waiting for msr change to
happen */
struct edgeport_serial *edge_serial;
struct usb_serial_port *port;
__u8 bUartMode; /* Port type, 0: RS232, etc. */
spinlock_t ep_lock;
int ep_read_urb_state;
int ep_write_urb_in_use;
struct edge_buf *ep_out_buf;
};
struct edgeport_serial {
struct product_info product_info;
u8 TI_I2C_Type; // Type of I2C in UMP
u8 TiReadI2C; // Set to TRUE if we have read the I2c in Boot Mode
struct mutex es_lock;
int num_ports_open;
struct usb_serial *serial;
};
/* Devices that this driver supports */
static struct usb_device_id edgeport_1port_id_table [] = {
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
{ }
};
static struct usb_device_id edgeport_2port_id_table [] = {
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
/* The 4, 8 and 16 port devices show up as multiple 2 port devices */
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
{ }
};
/* Devices that this driver supports */
static struct usb_device_id id_table_combined [] = {
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
{ }
};
MODULE_DEVICE_TABLE (usb, id_table_combined);
static struct usb_driver io_driver = {
.name = "io_ti",
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table_combined,
.no_dynamic_id = 1,
};
static struct EDGE_FIRMWARE_VERSION_INFO OperationalCodeImageVersion;
static int debug;
static int TIStayInBootMode = 0;
static int low_latency = EDGE_LOW_LATENCY;
static int closing_wait = EDGE_CLOSING_WAIT;
static int ignore_cpu_rev = 0;
static int default_uart_mode = 0; /* RS232 */
static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
static void stop_read(struct edgeport_port *edge_port);
static int restart_read(struct edgeport_port *edge_port);
static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
static void edge_send(struct usb_serial_port *port);
/* sysfs attributes */
static int edge_create_sysfs_attrs(struct usb_serial_port *port);
static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
/* circular buffer */
static struct edge_buf *edge_buf_alloc(unsigned int size);
static void edge_buf_free(struct edge_buf *eb);
static void edge_buf_clear(struct edge_buf *eb);
static unsigned int edge_buf_data_avail(struct edge_buf *eb);
static unsigned int edge_buf_space_avail(struct edge_buf *eb);
static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
unsigned int count);
static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
unsigned int count);
static int TIReadVendorRequestSync (struct usb_device *dev,
__u8 request,
__u16 value,
__u16 index,
u8 *data,
int size)
{
int status;
status = usb_control_msg (dev,
usb_rcvctrlpipe(dev, 0),
request,
(USB_TYPE_VENDOR |
USB_RECIP_DEVICE |
USB_DIR_IN),
value,
index,
data,
size,
1000);
if (status < 0)
return status;
if (status != size) {
dbg ("%s - wanted to write %d, but only wrote %d",
__FUNCTION__, size, status);
return -ECOMM;
}
return 0;
}
static int TISendVendorRequestSync (struct usb_device *dev,
__u8 request,
__u16 value,
__u16 index,
u8 *data,
int size)
{
int status;
status = usb_control_msg (dev,
usb_sndctrlpipe(dev, 0),
request,
(USB_TYPE_VENDOR |
USB_RECIP_DEVICE |
USB_DIR_OUT),
value,
index,
data,
size,
1000);
if (status < 0)
return status;
if (status != size) {
dbg ("%s - wanted to write %d, but only wrote %d",
__FUNCTION__, size, status);
return -ECOMM;
}
return 0;
}
static int TIWriteCommandSync (struct usb_device *dev, __u8 command,
__u8 moduleid, __u16 value, u8 *data,
int size)
{
return TISendVendorRequestSync (dev,
command, // Request
value, // wValue
moduleid, // wIndex
data, // TransferBuffer
size); // TransferBufferLength
}
/* clear tx/rx buffers and fifo in TI UMP */
static int TIPurgeDataSync (struct usb_serial_port *port, __u16 mask)
{
int port_number = port->number - port->serial->minor;
dbg ("%s - port %d, mask %x", __FUNCTION__, port_number, mask);
return TIWriteCommandSync (port->serial->dev,
UMPC_PURGE_PORT,
(__u8)(UMPM_UART1_PORT + port_number),
mask,
NULL,
0);
}
/**
* TIReadDownloadMemory - Read edgeport memory from TI chip
* @dev: usb device pointer
* @start_address: Device CPU address at which to read
* @length: Length of above data
* @address_type: Can read both XDATA and I2C
* @buffer: pointer to input data buffer
*/
static int TIReadDownloadMemory(struct usb_device *dev, int start_address,
int length, __u8 address_type, __u8 *buffer)
{
int status = 0;
__u8 read_length;
__be16 be_start_address;
dbg ("%s - @ %x for %d", __FUNCTION__, start_address, length);
/* Read in blocks of 64 bytes
* (TI firmware can't handle more than 64 byte reads)
*/
while (length) {
if (length > 64)
read_length= 64;
else
read_length = (__u8)length;
if (read_length > 1) {
dbg ("%s - @ %x for %d", __FUNCTION__,
start_address, read_length);
}
be_start_address = cpu_to_be16 (start_address);
status = TIReadVendorRequestSync (dev,
UMPC_MEMORY_READ, // Request
(__u16)address_type, // wValue (Address type)
(__force __u16)be_start_address, // wIndex (Address to read)
buffer, // TransferBuffer
read_length); // TransferBufferLength
if (status) {
dbg ("%s - ERROR %x", __FUNCTION__, status);
return status;
}
if (read_length > 1) {
usb_serial_debug_data(debug, &dev->dev, __FUNCTION__,
read_length, buffer);
}
/* Update pointers/length */
start_address += read_length;
buffer += read_length;
length -= read_length;
}
return status;
}
static int TIReadRam (struct usb_device *dev, int start_address, int length, __u8 *buffer)
{
return TIReadDownloadMemory (dev,
start_address,
length,
DTK_ADDR_SPACE_XDATA,
buffer);
}
/* Read edgeport memory to a given block */
static int TIReadBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 * buffer)
{
int status = 0;
int i;
for (i=0; i< length; i++) {
status = TIReadVendorRequestSync (serial->serial->dev,
UMPC_MEMORY_READ, // Request
serial->TI_I2C_Type, // wValue (Address type)
(__u16)(start_address+i), // wIndex
&buffer[i], // TransferBuffer
0x01); // TransferBufferLength
if (status) {
dbg ("%s - ERROR %x", __FUNCTION__, status);
return status;
}
}
dbg ("%s - start_address = %x, length = %d", __FUNCTION__, start_address, length);
usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);
serial->TiReadI2C = 1;
return status;
}
/* Write given block to TI EPROM memory */
static int TIWriteBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
{
int status = 0;
int i;
__u8 temp;
/* Must do a read before write */
if (!serial->TiReadI2C) {
status = TIReadBootMemory(serial, 0, 1, &temp);
if (status)
return status;
}
for (i=0; i < length; ++i) {
status = TISendVendorRequestSync (serial->serial->dev,
UMPC_MEMORY_WRITE, // Request
buffer[i], // wValue
(__u16)(i+start_address), // wIndex
NULL, // TransferBuffer
0); // TransferBufferLength
if (status)
return status;
}
dbg ("%s - start_sddr = %x, length = %d", __FUNCTION__, start_address, length);
usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);
return status;
}
/* Write edgeport I2C memory to TI chip */
static int TIWriteDownloadI2C (struct edgeport_serial *serial, int start_address, int length, __u8 address_type, __u8 *buffer)
{
int status = 0;
int write_length;
__be16 be_start_address;
/* We can only send a maximum of 1 aligned byte page at a time */
/* calulate the number of bytes left in the first page */
write_length = EPROM_PAGE_SIZE - (start_address & (EPROM_PAGE_SIZE - 1));
if (write_length > length)
write_length = length;
dbg ("%s - BytesInFirstPage Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);
/* Write first page */
be_start_address = cpu_to_be16 (start_address);
status = TISendVendorRequestSync (serial->serial->dev,
UMPC_MEMORY_WRITE, // Request
(__u16)address_type, // wValue
(__force __u16)be_start_address, // wIndex
buffer, // TransferBuffer
write_length);
if (status) {
dbg ("%s - ERROR %d", __FUNCTION__, status);
return status;
}
length -= write_length;
start_address += write_length;
buffer += write_length;
/* We should be aligned now -- can write max page size bytes at a time */
while (length) {
if (length > EPROM_PAGE_SIZE)
write_length = EPROM_PAGE_SIZE;
else
write_length = length;
dbg ("%s - Page Write Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);
/* Write next page */
be_start_address = cpu_to_be16 (start_address);
status = TISendVendorRequestSync (serial->serial->dev,
UMPC_MEMORY_WRITE, // Request
(__u16)address_type, // wValue
(__force __u16)be_start_address, // wIndex
buffer, // TransferBuffer
write_length); // TransferBufferLength
if (status) {
dev_err (&serial->serial->dev->dev, "%s - ERROR %d\n", __FUNCTION__, status);
return status;
}
length -= write_length;
start_address += write_length;
buffer += write_length;
}
return status;
}
/* Examine the UMP DMA registers and LSR
*
* Check the MSBit of the X and Y DMA byte count registers.
* A zero in this bit indicates that the TX DMA buffers are empty
* then check the TX Empty bit in the UART.
*/
static int TIIsTxActive (struct edgeport_port *port)
{
int status;
struct out_endpoint_desc_block *oedb;
__u8 *lsr;
int bytes_left = 0;
oedb = kmalloc (sizeof (* oedb), GFP_KERNEL);
if (!oedb) {
dev_err (&port->port->dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
lsr = kmalloc (1, GFP_KERNEL); /* Sigh, that's right, just one byte,
as not all platforms can do DMA
from stack */
if (!lsr) {
kfree(oedb);
return -ENOMEM;
}
/* Read the DMA Count Registers */
status = TIReadRam (port->port->serial->dev,
port->dma_address,
sizeof( *oedb),
(void *)oedb);
if (status)
goto exit_is_tx_active;
dbg ("%s - XByteCount 0x%X", __FUNCTION__, oedb->XByteCount);
/* and the LSR */
status = TIReadRam (port->port->serial->dev,
port->uart_base + UMPMEM_OFFS_UART_LSR,
1,
lsr);
if (status)
goto exit_is_tx_active;
dbg ("%s - LSR = 0x%X", __FUNCTION__, *lsr);
/* If either buffer has data or we are transmitting then return TRUE */
if ((oedb->XByteCount & 0x80 ) != 0 )
bytes_left += 64;
if ((*lsr & UMP_UART_LSR_TX_MASK ) == 0 )
bytes_left += 1;
/* We return Not Active if we get any kind of error */
exit_is_tx_active:
dbg ("%s - return %d", __FUNCTION__, bytes_left );
kfree(lsr);
kfree(oedb);
return bytes_left;
}
static void TIChasePort(struct edgeport_port *port, unsigned long timeout, int flush)
{
int baud_rate;
struct tty_struct *tty = port->port->tty;
wait_queue_t wait;
unsigned long flags;
if (!timeout)
timeout = (HZ*EDGE_CLOSING_WAIT)/100;
/* wait for data to drain from the buffer */
spin_lock_irqsave(&port->ep_lock, flags);
init_waitqueue_entry(&wait, current);
add_wait_queue(&tty->write_wait, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
if (edge_buf_data_avail(port->ep_out_buf) == 0
|| timeout == 0 || signal_pending(current)
|| !usb_get_intfdata(port->port->serial->interface)) /* disconnect */
break;
spin_unlock_irqrestore(&port->ep_lock, flags);
timeout = schedule_timeout(timeout);
spin_lock_irqsave(&port->ep_lock, flags);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&tty->write_wait, &wait);
if (flush)
edge_buf_clear(port->ep_out_buf);
spin_unlock_irqrestore(&port->ep_lock, flags);
/* wait for data to drain from the device */
timeout += jiffies;
while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
&& usb_get_intfdata(port->port->serial->interface)) { /* not disconnected */
if (!TIIsTxActive(port))
break;
msleep(10);
}
/* disconnected */
if (!usb_get_intfdata(port->port->serial->interface))
return;
/* wait one more character time, based on baud rate */
/* (TIIsTxActive doesn't seem to wait for the last byte) */
if ((baud_rate=port->baud_rate) == 0)
baud_rate = 50;
msleep(max(1,(10000+baud_rate-1)/baud_rate));
}
static int TIChooseConfiguration (struct usb_device *dev)
{
// There may be multiple configurations on this device, in which case
// we would need to read and parse all of them to find out which one
// we want. However, we just support one config at this point,
// configuration # 1, which is Config Descriptor 0.
dbg ("%s - Number of Interfaces = %d", __FUNCTION__, dev->config->desc.bNumInterfaces);
dbg ("%s - MAX Power = %d", __FUNCTION__, dev->config->desc.bMaxPower*2);
if (dev->config->desc.bNumInterfaces != 1) {
dev_err (&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __FUNCTION__);
return -ENODEV;
}
return 0;
}
static int TIReadRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
{
int status;
if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
status = TIReadDownloadMemory (serial->serial->dev,
start_address,
length,
serial->TI_I2C_Type,
buffer);
} else {
status = TIReadBootMemory (serial,
start_address,
length,
buffer);
}
return status;
}
static int TIWriteRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
{
if (serial->product_info.TiMode == TI_MODE_BOOT)
return TIWriteBootMemory (serial,
start_address,
length,
buffer);
if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
return TIWriteDownloadI2C (serial,
start_address,
length,
serial->TI_I2C_Type,
buffer);
return -EINVAL;
}
/* Read a descriptor header from I2C based on type */
static int TIGetDescriptorAddress (struct edgeport_serial *serial, int desc_type, struct ti_i2c_desc *rom_desc)
{
int start_address;
int status;
/* Search for requested descriptor in I2C */
start_address = 2;
do {
status = TIReadRom (serial,
start_address,
sizeof(struct ti_i2c_desc),
(__u8 *)rom_desc );
if (status)
return 0;
if (rom_desc->Type == desc_type)
return start_address;
start_address = start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size;
} while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
return 0;
}
/* Validate descriptor checksum */
static int ValidChecksum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
{
__u16 i;
__u8 cs = 0;
for (i=0; i < rom_desc->Size; i++) {
cs = (__u8)(cs + buffer[i]);
}
if (cs != rom_desc->CheckSum) {
dbg ("%s - Mismatch %x - %x", __FUNCTION__, rom_desc->CheckSum, cs);
return -EINVAL;
}
return 0;
}
/* Make sure that the I2C image is good */
static int TiValidateI2cImage (struct edgeport_serial *serial)
{
struct device *dev = &serial->serial->dev->dev;
int status = 0;
struct ti_i2c_desc *rom_desc;
int start_address = 2;
__u8 *buffer;
__u16 ttype;
rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
if (!rom_desc) {
dev_err (dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
buffer = kmalloc (TI_MAX_I2C_SIZE, GFP_KERNEL);
if (!buffer) {
dev_err (dev, "%s - out of memory when allocating buffer\n", __FUNCTION__);
kfree (rom_desc);
return -ENOMEM;
}
// Read the first byte (Signature0) must be 0x52 or 0x10
status = TIReadRom (serial, 0, 1, buffer);
if (status)
goto ExitTiValidateI2cImage;
if (*buffer != UMP5152 && *buffer != UMP3410) {
dev_err (dev, "%s - invalid buffer signature\n", __FUNCTION__);
status = -ENODEV;
goto ExitTiValidateI2cImage;
}
do {
// Validate the I2C
status = TIReadRom (serial,
start_address,
sizeof(struct ti_i2c_desc),
(__u8 *)rom_desc);
if (status)
break;
if ((start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size) > TI_MAX_I2C_SIZE) {
status = -ENODEV;
dbg ("%s - structure too big, erroring out.", __FUNCTION__);
break;
}
dbg ("%s Type = 0x%x", __FUNCTION__, rom_desc->Type);
// Skip type 2 record
ttype = rom_desc->Type & 0x0f;
if ( ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
&& ttype != I2C_DESC_TYPE_FIRMWARE_AUTO ) {
// Read the descriptor data
status = TIReadRom(serial,
start_address+sizeof(struct ti_i2c_desc),
rom_desc->Size,
buffer);
if (status)
break;
status = ValidChecksum(rom_desc, buffer);
if (status)
break;
}
start_address = start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size;
} while ((rom_desc->Type != I2C_DESC_TYPE_ION) && (start_address < TI_MAX_I2C_SIZE));
if ((rom_desc->Type != I2C_DESC_TYPE_ION) || (start_address > TI_MAX_I2C_SIZE))
status = -ENODEV;
ExitTiValidateI2cImage:
kfree (buffer);
kfree (rom_desc);
return status;
}
static int TIReadManufDescriptor (struct edgeport_serial *serial, __u8 *buffer)
{
int status;
int start_address;
struct ti_i2c_desc *rom_desc;
struct edge_ti_manuf_descriptor *desc;
rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
if (!rom_desc) {
dev_err (&serial->serial->dev->dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_ION, rom_desc);
if (!start_address) {
dbg ("%s - Edge Descriptor not found in I2C", __FUNCTION__);
status = -ENODEV;
goto exit;
}
// Read the descriptor data
status = TIReadRom (serial,
start_address+sizeof(struct ti_i2c_desc),
rom_desc->Size,
buffer);
if (status)
goto exit;
status = ValidChecksum(rom_desc, buffer);
desc = (struct edge_ti_manuf_descriptor *)buffer;
dbg ( "%s - IonConfig 0x%x", __FUNCTION__, desc->IonConfig );
dbg ( "%s - Version %d", __FUNCTION__, desc->Version );
dbg ( "%s - Cpu/Board 0x%x", __FUNCTION__, desc->CpuRev_BoardRev );
dbg ( "%s - NumPorts %d", __FUNCTION__, desc->NumPorts );
dbg ( "%s - NumVirtualPorts %d", __FUNCTION__, desc->NumVirtualPorts );
dbg ( "%s - TotalPorts %d", __FUNCTION__, desc->TotalPorts );
exit:
kfree (rom_desc);
return status;
}
/* Build firmware header used for firmware update */
static int BuildI2CFirmwareHeader (__u8 *header, struct device *dev)
{
__u8 *buffer;
int buffer_size;
int i;
__u8 cs = 0;
struct ti_i2c_desc *i2c_header;
struct ti_i2c_image_header *img_header;
struct ti_i2c_firmware_rec *firmware_rec;
// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
// This will force the UMP to come up in Boot Mode. Then while in boot mode, the driver
// will download the latest firmware (padded to 15.5k) into the UMP ram.
// And finally when the device comes back up in download mode the driver will cause
// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
// the record type from 0xf2 to 0x02.
// Allocate a 15.5k buffer + 2 bytes for version number (Firmware Record)
buffer_size = (((1024 * 16) - 512 )+ sizeof(struct ti_i2c_firmware_rec));
buffer = kmalloc (buffer_size, GFP_KERNEL);
if (!buffer) {
dev_err (dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
// Set entire image of 0xffs
memset (buffer, 0xff, buffer_size);
// Copy version number into firmware record
firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
firmware_rec->Ver_Major = OperationalCodeImageVersion.MajorVersion;
firmware_rec->Ver_Minor = OperationalCodeImageVersion.MinorVersion;
// Pointer to fw_down memory image
img_header = (struct ti_i2c_image_header *)&PagableOperationalCodeImage[0];
memcpy (buffer + sizeof(struct ti_i2c_firmware_rec),
&PagableOperationalCodeImage[sizeof(struct ti_i2c_image_header)],
le16_to_cpu(img_header->Length));
for (i=0; i < buffer_size; i++) {
cs = (__u8)(cs + buffer[i]);
}
kfree (buffer);
// Build new header
i2c_header = (struct ti_i2c_desc *)header;
firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
i2c_header->Size = (__u16)buffer_size;
i2c_header->CheckSum = cs;
firmware_rec->Ver_Major = OperationalCodeImageVersion.MajorVersion;
firmware_rec->Ver_Minor = OperationalCodeImageVersion.MinorVersion;
return 0;
}
/* Try to figure out what type of I2c we have */
static int TIGetI2cTypeInBootMode (struct edgeport_serial *serial)
{
int status;
__u8 data;
// Try to read type 2
status = TIReadVendorRequestSync (serial->serial->dev,
UMPC_MEMORY_READ, // Request
DTK_ADDR_SPACE_I2C_TYPE_II, // wValue (Address type)
0, // wIndex
&data, // TransferBuffer
0x01); // TransferBufferLength
if (status)
dbg ("%s - read 2 status error = %d", __FUNCTION__, status);
else
dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
if ((!status) && (data == UMP5152 || data == UMP3410)) {
dbg ("%s - ROM_TYPE_II", __FUNCTION__);
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
return 0;
}
// Try to read type 3
status = TIReadVendorRequestSync (serial->serial->dev,
UMPC_MEMORY_READ, // Request
DTK_ADDR_SPACE_I2C_TYPE_III, // wValue (Address type)
0, // wIndex
&data, // TransferBuffer
0x01); // TransferBufferLength
if (status)
dbg ("%s - read 3 status error = %d", __FUNCTION__, status);
else
dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
if ((!status) && (data == UMP5152 || data == UMP3410)) {
dbg ("%s - ROM_TYPE_III", __FUNCTION__);
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
return 0;
}
dbg ("%s - Unknown", __FUNCTION__);
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
return -ENODEV;
}
static int TISendBulkTransferSync (struct usb_serial *serial, void *buffer, int length, int *num_sent)
{
int status;
status = usb_bulk_msg (serial->dev,
usb_sndbulkpipe(serial->dev,
serial->port[0]->bulk_out_endpointAddress),
buffer,
length,
num_sent,
1000);
return status;
}
/* Download given firmware image to the device (IN BOOT MODE) */
static int TIDownloadCodeImage (struct edgeport_serial *serial, __u8 *image, int image_length)
{
int status = 0;
int pos;
int transfer;
int done;
// Transfer firmware image
for (pos = 0; pos < image_length; ) {
// Read the next buffer from file
transfer = image_length - pos;
if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
// Transfer data
status = TISendBulkTransferSync (serial->serial, &image[pos], transfer, &done);
if (status)
break;
// Advance buffer pointer
pos += done;
}
return status;
}
// FIXME!!!
static int TIConfigureBootDevice (struct usb_device *dev)
{
return 0;
}
/**
* DownloadTIFirmware - Download run-time operating firmware to the TI5052
*
* This routine downloads the main operating code into the TI5052, using the
* boot code already burned into E2PROM or ROM.
*/
static int TIDownloadFirmware (struct edgeport_serial *serial)
{
struct device *dev = &serial->serial->dev->dev;
int status = 0;
int start_address;
struct edge_ti_manuf_descriptor *ti_manuf_desc;
struct usb_interface_descriptor *interface;
int download_cur_ver;
int download_new_ver;
/* This routine is entered by both the BOOT mode and the Download mode
* We can determine which code is running by the reading the config
* descriptor and if we have only one bulk pipe it is in boot mode
*/
serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
/* Default to type 2 i2c */
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
status = TIChooseConfiguration (serial->serial->dev);
if (status)
return status;
interface = &serial->serial->interface->cur_altsetting->desc;
if (!interface) {
dev_err (dev, "%s - no interface set, error!\n", __FUNCTION__);
return -ENODEV;
}
// Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
// if we have more than one endpoint we are definitely in download mode
if (interface->bNumEndpoints > 1)
serial->product_info.TiMode = TI_MODE_DOWNLOAD;
else
// Otherwise we will remain in configuring mode
serial->product_info.TiMode = TI_MODE_CONFIGURING;
// Save Download Version Number
OperationalCodeImageVersion.MajorVersion = PagableOperationalCodeImageVersion.MajorVersion;
OperationalCodeImageVersion.MinorVersion = PagableOperationalCodeImageVersion.MinorVersion;
OperationalCodeImageVersion.BuildNumber = PagableOperationalCodeImageVersion.BuildNumber;
/********************************************************************/
/* Download Mode */
/********************************************************************/
if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
struct ti_i2c_desc *rom_desc;
dbg ("%s - <<<<<<<<<<<<<<<RUNNING IN DOWNLOAD MODE>>>>>>>>>>", __FUNCTION__);
status = TiValidateI2cImage (serial);
if (status) {
dbg ("%s - <<<<<<<<<<<<<<<DOWNLOAD MODE -- BAD I2C >>>>>>>>>>",
__FUNCTION__);
return status;
}
/* Validate Hardware version number
* Read Manufacturing Descriptor from TI Based Edgeport
*/
ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
if (!ti_manuf_desc) {
dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
return -ENOMEM;
}
status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
if (status) {
kfree (ti_manuf_desc);
return status;
}
// Check version number of ION descriptor
if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
dbg ( "%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
kfree (ti_manuf_desc);
return -EINVAL;
}
rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
if (!rom_desc) {
dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
kfree (ti_manuf_desc);
return -ENOMEM;
}
// Search for type 2 record (firmware record)
if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc)) != 0) {
struct ti_i2c_firmware_rec *firmware_version;
__u8 record;
dbg ("%s - Found Type FIRMWARE (Type 2) record", __FUNCTION__);
firmware_version = kmalloc (sizeof (*firmware_version), GFP_KERNEL);
if (!firmware_version) {
dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
kfree (rom_desc);
kfree (ti_manuf_desc);
return -ENOMEM;
}
// Validate version number
// Read the descriptor data
status = TIReadRom (serial,
start_address+sizeof(struct ti_i2c_desc),
sizeof(struct ti_i2c_firmware_rec),
(__u8 *)firmware_version);
if (status) {
kfree (firmware_version);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
// Check version number of download with current version in I2c
download_cur_ver = (firmware_version->Ver_Major << 8) +
(firmware_version->Ver_Minor);
download_new_ver = (OperationalCodeImageVersion.MajorVersion << 8) +
(OperationalCodeImageVersion.MinorVersion);
dbg ("%s - >>>Firmware Versions Device %d.%d Driver %d.%d",
__FUNCTION__,
firmware_version->Ver_Major,
firmware_version->Ver_Minor,
OperationalCodeImageVersion.MajorVersion,
OperationalCodeImageVersion.MinorVersion);
// Check if we have an old version in the I2C and update if necessary
if (download_cur_ver != download_new_ver) {
dbg ("%s - Update I2C Download from %d.%d to %d.%d",
__FUNCTION__,
firmware_version->Ver_Major,
firmware_version->Ver_Minor,
OperationalCodeImageVersion.MajorVersion,
OperationalCodeImageVersion.MinorVersion);
// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
// This will force the UMP to come up in Boot Mode. Then while in boot mode, the driver
// will download the latest firmware (padded to 15.5k) into the UMP ram.
// And finally when the device comes back up in download mode the driver will cause
// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
// the record type from 0xf2 to 0x02.
record = I2C_DESC_TYPE_FIRMWARE_BLANK;
// Change the I2C Firmware record type to 0xf2 to trigger an update
status = TIWriteRom (serial,
start_address,
sizeof(record),
&record);
if (status) {
kfree (firmware_version);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
// verify the write -- must do this in order for write to
// complete before we do the hardware reset
status = TIReadRom (serial,
start_address,
sizeof(record),
&record);
if (status) {
kfree (firmware_version);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
dev_err (dev, "%s - error resetting device\n", __FUNCTION__);
kfree (firmware_version);
kfree (rom_desc);
kfree (ti_manuf_desc);
return -ENODEV;
}
dbg ("%s - HARDWARE RESET", __FUNCTION__);
// Reset UMP -- Back to BOOT MODE
status = TISendVendorRequestSync (serial->serial->dev,
UMPC_HARDWARE_RESET, // Request
0, // wValue
0, // wIndex
NULL, // TransferBuffer
0); // TransferBufferLength
dbg ( "%s - HARDWARE RESET return %d", __FUNCTION__, status);
/* return an error on purpose. */
kfree (firmware_version);
kfree (rom_desc);
kfree (ti_manuf_desc);
return -ENODEV;
}
kfree (firmware_version);
}
// Search for type 0xF2 record (firmware blank record)
else if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
#define HEADER_SIZE (sizeof(struct ti_i2c_desc) + sizeof(struct ti_i2c_firmware_rec))
__u8 *header;
__u8 *vheader;
header = kmalloc (HEADER_SIZE, GFP_KERNEL);
if (!header) {
dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
kfree (rom_desc);
kfree (ti_manuf_desc);
return -ENOMEM;
}
vheader = kmalloc (HEADER_SIZE, GFP_KERNEL);
if (!vheader) {
dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
kfree (header);
kfree (rom_desc);
kfree (ti_manuf_desc);
return -ENOMEM;
}
dbg ("%s - Found Type BLANK FIRMWARE (Type F2) record", __FUNCTION__);
// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
// This will force the UMP to come up in Boot Mode. Then while in boot mode, the driver
// will download the latest firmware (padded to 15.5k) into the UMP ram.
// And finally when the device comes back up in download mode the driver will cause
// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
// the record type from 0xf2 to 0x02.
status = BuildI2CFirmwareHeader(header, dev);
if (status) {
kfree (vheader);
kfree (header);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
// Update I2C with type 0xf2 record with correct size and checksum
status = TIWriteRom (serial,
start_address,
HEADER_SIZE,
header);
if (status) {
kfree (vheader);
kfree (header);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
// verify the write -- must do this in order for write to
// complete before we do the hardware reset
status = TIReadRom (serial,
start_address,
HEADER_SIZE,
vheader);
if (status) {
dbg ("%s - can't read header back", __FUNCTION__);
kfree (vheader);
kfree (header);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
if (memcmp(vheader, header, HEADER_SIZE)) {
dbg ("%s - write download record failed", __FUNCTION__);
kfree (vheader);
kfree (header);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
kfree (vheader);
kfree (header);
dbg ("%s - Start firmware update", __FUNCTION__);
// Tell firmware to copy download image into I2C
status = TISendVendorRequestSync (serial->serial->dev,
UMPC_COPY_DNLD_TO_I2C, // Request
0, // wValue
0, // wIndex
NULL, // TransferBuffer
0); // TransferBufferLength
dbg ("%s - Update complete 0x%x", __FUNCTION__, status);
if (status) {
dev_err (dev, "%s - UMPC_COPY_DNLD_TO_I2C failed\n", __FUNCTION__);
kfree (rom_desc);
kfree (ti_manuf_desc);
return status;
}
}
// The device is running the download code
kfree (rom_desc);
kfree (ti_manuf_desc);
return 0;
}
/********************************************************************/
/* Boot Mode */
/********************************************************************/
dbg ("%s - <<<<<<<<<<<<<<<RUNNING IN BOOT MODE>>>>>>>>>>>>>>>",
__FUNCTION__);
// Configure the TI device so we can use the BULK pipes for download
status = TIConfigureBootDevice (serial->serial->dev);
if (status)
return status;
if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) != USB_VENDOR_ID_ION) {
dbg ("%s - VID = 0x%x", __FUNCTION__,
le16_to_cpu(serial->serial->dev->descriptor.idVendor));
serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
goto StayInBootMode;
}
// We have an ION device (I2c Must be programmed)
// Determine I2C image type
if (TIGetI2cTypeInBootMode(serial)) {
goto StayInBootMode;
}
// Registry variable set?
if (TIStayInBootMode) {
dbg ("%s - TIStayInBootMode", __FUNCTION__);
goto StayInBootMode;
}
// Check for ION Vendor ID and that the I2C is valid
if (!TiValidateI2cImage(serial)) {
struct ti_i2c_image_header *header;
int i;
__u8 cs = 0;
__u8 *buffer;
int buffer_size;
/* Validate Hardware version number
* Read Manufacturing Descriptor from TI Based Edgeport
*/
ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
if (!ti_manuf_desc) {
dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
return -ENOMEM;
}
status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
if (status) {
kfree (ti_manuf_desc);
goto StayInBootMode;
}
// Check for version 2
if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
dbg ("%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
kfree (ti_manuf_desc);
goto StayInBootMode;
}
kfree (ti_manuf_desc);
// In order to update the I2C firmware we must change the type 2 record to type 0xF2.
// This will force the UMP to come up in Boot Mode. Then while in boot mode, the driver
// will download the latest firmware (padded to 15.5k) into the UMP ram.
// And finally when the device comes back up in download mode the driver will cause
// the new firmware to be copied from the UMP Ram to I2C and the firmware will update
// the record type from 0xf2 to 0x02.
/*
* Do we really have to copy the whole firmware image,
* or could we do this in place!
*/
// Allocate a 15.5k buffer + 3 byte header
buffer_size = (((1024 * 16) - 512) + sizeof(struct ti_i2c_image_header));
buffer = kmalloc (buffer_size, GFP_KERNEL);
if (!buffer) {
dev_err (dev, "%s - out of memory\n", __FUNCTION__);
return -ENOMEM;
}
// Initialize the buffer to 0xff (pad the buffer)
memset (buffer, 0xff, buffer_size);
memcpy (buffer, &PagableOperationalCodeImage[0], PagableOperationalCodeSize);
for(i = sizeof(struct ti_i2c_image_header); i < buffer_size; i++) {
cs = (__u8)(cs + buffer[i]);
}
header = (struct ti_i2c_image_header *)buffer;
// update length and checksum after padding
header->Length = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_i2c_image_header)));
header->CheckSum = cs;
// Download the operational code
dbg ("%s - Downloading operational code image (TI UMP)", __FUNCTION__);
status = TIDownloadCodeImage (serial, buffer, buffer_size);
kfree (buffer);
if (status) {
dbg ("%s - Error downloading operational code image", __FUNCTION__);
return status;
}
// Device will reboot
serial->product_info.TiMode = TI_MODE_TRANSITIONING;
dbg ("%s - Download successful -- Device rebooting...", __FUNCTION__);
/* return an error on purpose */
return -ENODEV;
}
StayInBootMode:
// Eprom is invalid or blank stay in boot mode
dbg ("%s - <<<<<<<<<<<<<<<STAYING IN BOOT MODE>>>>>>>>>>>>", __FUNCTION__);
serial->product_info.TiMode = TI_MODE_BOOT;
return 0;
}
static int TISetDtr (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
port->shadow_mcr |= MCR_DTR;
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_DTR,
(__u8)(UMPM_UART1_PORT + port_number),
1, /* set */
NULL,
0);
}
static int TIClearDtr (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
port->shadow_mcr &= ~MCR_DTR;
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_DTR,
(__u8)(UMPM_UART1_PORT + port_number),
0, /* clear */
NULL,
0);
}
static int TISetRts (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
port->shadow_mcr |= MCR_RTS;
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_RTS,
(__u8)(UMPM_UART1_PORT + port_number),
1, /* set */
NULL,
0);
}
static int TIClearRts (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
port->shadow_mcr &= ~MCR_RTS;
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_RTS,
(__u8)(UMPM_UART1_PORT + port_number),
0, /* clear */
NULL,
0);
}
static int TISetLoopBack (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_LOOPBACK,
(__u8)(UMPM_UART1_PORT + port_number),
1, /* set */
NULL,
0);
}
static int TIClearLoopBack (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_LOOPBACK,
(__u8)(UMPM_UART1_PORT + port_number),
0, /* clear */
NULL,
0);
}
static int TISetBreak (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_BREAK,
(__u8)(UMPM_UART1_PORT + port_number),
1, /* set */
NULL,
0);
}
static int TIClearBreak (struct edgeport_port *port)
{
int port_number = port->port->number - port->port->serial->minor;
dbg ("%s", __FUNCTION__);
return TIWriteCommandSync (port->port->serial->dev,
UMPC_SET_CLR_BREAK,
(__u8)(UMPM_UART1_PORT + port_number),
0, /* clear */
NULL,
0);
}
static int TIRestoreMCR (struct edgeport_port *port, __u8 mcr)
{
int status = 0;
dbg ("%s - %x", __FUNCTION__, mcr);
if (mcr & MCR_DTR)
status = TISetDtr (port);
else
status = TIClearDtr (port);
if (status)
return status;
if (mcr & MCR_RTS)
status = TISetRts (port);
else
status = TIClearRts (port);
if (status)
return status;
if (mcr & MCR_LOOPBACK)
status = TISetLoopBack (port);
else
status = TIClearLoopBack (port);
return status;
}
/* Convert TI LSR to standard UART flags */
static __u8 MapLineStatus (__u8 ti_lsr)
{
__u8 lsr = 0;
#define MAP_FLAG(flagUmp, flagUart) \
if (ti_lsr & flagUmp) \
lsr |= flagUart;
MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* receive data available */
MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* transmit holding register empty */
#undef MAP_FLAG
return lsr;
}
static void handle_new_msr (struct edgeport_port *edge_port, __u8 msr)
{
struct async_icount *icount;
struct tty_struct *tty;
dbg ("%s - %02x", __FUNCTION__, msr);
if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
icount = &edge_port->icount;
/* update input line counters */
if (msr & EDGEPORT_MSR_DELTA_CTS)
icount->cts++;
if (msr & EDGEPORT_MSR_DELTA_DSR)
icount->dsr++;
if (msr & EDGEPORT_MSR_DELTA_CD)
icount->dcd++;
if (msr & EDGEPORT_MSR_DELTA_RI)
icount->rng++;
wake_up_interruptible (&edge_port->delta_msr_wait);
}
/* Save the new modem status */
edge_port->shadow_msr = msr & 0xf0;
tty = edge_port->port->tty;
/* handle CTS flow control */
if (tty && C_CRTSCTS(tty)) {
if (msr & EDGEPORT_MSR_CTS) {
tty->hw_stopped = 0;
tty_wakeup(tty);
} else {
tty->hw_stopped = 1;
}
}
return;
}
static void handle_new_lsr (struct edgeport_port *edge_port, int lsr_data, __u8 lsr, __u8 data)
{
struct async_icount *icount;
__u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
dbg ("%s - %02x", __FUNCTION__, new_lsr);
edge_port->shadow_lsr = lsr;
if (new_lsr & LSR_BREAK) {
/*
* Parity and Framing errors only count if they
* occur exclusive of a break being received.
*/
new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
}
/* Place LSR data byte into Rx buffer */
if (lsr_data && edge_port->port->tty)
edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
/* update input line counters */
icount = &edge_port->icount;
if (new_lsr & LSR_BREAK)
icount->brk++;
if (new_lsr & LSR_OVER_ERR)
icount->overrun++;
if (new_lsr & LSR_PAR_ERR)
icount->parity++;
if (new_lsr & LSR_FRM_ERR)
icount->frame++;
}
static void edge_interrupt_callback (struct urb *urb)
{
struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
struct usb_serial_port *port;
struct edgeport_port *edge_port;
unsigned char *data = urb->transfer_buffer;
int length = urb->actual_length;
int port_number;
int function;
int retval;
__u8 lsr;
__u8 msr;
int status = urb->status;
dbg("%s", __FUNCTION__);
switch (status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__FUNCTION__, status);
return;
default:
dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
"%d\n", __FUNCTION__, status);
goto exit;
}
if (!length) {
dbg ("%s - no data in urb", __FUNCTION__);
goto exit;
}
usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
if (length != 2) {
dbg ("%s - expecting packet of size 2, got %d", __FUNCTION__, length);
goto exit;
}
port_number = TIUMP_GET_PORT_FROM_CODE (data[0]);
function = TIUMP_GET_FUNC_FROM_CODE (data[0]);
dbg ("%s - port_number %d, function %d, info 0x%x",
__FUNCTION__, port_number, function, data[1]);
port = edge_serial->serial->port[port_number];
edge_port = usb_get_serial_port_data(port);
if (!edge_port) {
dbg ("%s - edge_port not found", __FUNCTION__);
return;
}
switch (function) {
case TIUMP_INTERRUPT_CODE_LSR:
lsr = MapLineStatus(data[1]);
if (lsr & UMP_UART_LSR_DATA_MASK) {
/* Save the LSR event for bulk read completion routine */
dbg ("%s - LSR Event Port %u LSR Status = %02x",
__FUNCTION__, port_number, lsr);
edge_port->lsr_event = 1;
edge_port->lsr_mask = lsr;
} else {
dbg ("%s - ===== Port %d LSR Status = %02x ======",
__FUNCTION__, port_number, lsr);
handle_new_lsr (edge_port, 0, lsr, 0);
}
break;
case TIUMP_INTERRUPT_CODE_MSR: // MSR
/* Copy MSR from UMP */
msr = data[1];
dbg ("%s - ===== Port %u MSR Status = %02x ======\n",
__FUNCTION__, port_number, msr);
handle_new_msr (edge_port, msr);
break;
default:
dev_err (&urb->dev->dev, "%s - Unknown Interrupt code from UMP %x\n",
__FUNCTION__, data[1]);
break;
}
exit:
retval = usb_submit_urb (urb, GFP_ATOMIC);
if (retval)
dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
__FUNCTION__, retval);
}
static void edge_bulk_in_callback (struct urb *urb)
{
struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
unsigned char *data = urb->transfer_buffer;
struct tty_struct *tty;
int retval = 0;
int port_number;
int status = urb->status;
dbg("%s", __FUNCTION__);
switch (status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__FUNCTION__, status);
return;
default:
dev_err (&urb->dev->dev,"%s - nonzero read bulk status received: %d\n",
__FUNCTION__, status);
}
if (status == -EPIPE)
goto exit;
if (status) {
dev_err(&urb->dev->dev,"%s - stopping read!\n", __FUNCTION__);
return;
}
port_number = edge_port->port->number - edge_port->port->serial->minor;
if (edge_port->lsr_event) {
edge_port->lsr_event = 0;
dbg ("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
__FUNCTION__, port_number, edge_port->lsr_mask, *data);
handle_new_lsr (edge_port, 1, edge_port->lsr_mask, *data);
/* Adjust buffer length/pointer */
--urb->actual_length;
++data;
}
tty = edge_port->port->tty;
if (tty && urb->actual_length) {
usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, urb->actual_length, data);
if (edge_port->close_pending) {
dbg ("%s - close is pending, dropping data on the floor.", __FUNCTION__);
} else {
edge_tty_recv(&edge_port->port->dev, tty, data, urb->actual_length);
}
edge_port->icount.rx += urb->actual_length;
}
exit:
/* continue read unless stopped */
spin_lock(&edge_port->ep_lock);
if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
urb->dev = edge_port->port->serial->dev;
retval = usb_submit_urb(urb, GFP_ATOMIC);
} else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
}
spin_unlock(&edge_port->ep_lock);
if (retval)
dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
__FUNCTION__, retval);
}
static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
{
int cnt;
do {
cnt = tty_buffer_request_room(tty, length);
if (cnt < length) {
dev_err(dev, "%s - dropping data, %d bytes lost\n",
__FUNCTION__, length - cnt);
if(cnt == 0)
break;
}
tty_insert_flip_string(tty, data, cnt);
data += cnt;
length -= cnt;
} while (length > 0);
tty_flip_buffer_push(tty);
}
static void edge_bulk_out_callback (struct urb *urb)
{
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int status = urb->status;
dbg ("%s - port %d", __FUNCTION__, port->number);
edge_port->ep_write_urb_in_use = 0;
switch (status) {
case 0:
/* success */
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__FUNCTION__, status);
return;
default:
dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
"received: %d\n", __FUNCTION__, status);
}
/* send any buffered data */
edge_send(port);
}
static int edge_open (struct usb_serial_port *port, struct file * filp)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct edgeport_serial *edge_serial;
struct usb_device *dev;
struct urb *urb;
int port_number;
int status;
u16 open_settings;
u8 transaction_timeout;
dbg("%s - port %d", __FUNCTION__, port->number);
if (edge_port == NULL)
return -ENODEV;
if (port->tty)
port->tty->low_latency = low_latency;
port_number = port->number - port->serial->minor;
switch (port_number) {
case 0:
edge_port->uart_base = UMPMEM_BASE_UART1;
edge_port->dma_address = UMPD_OEDB1_ADDRESS;
break;
case 1:
edge_port->uart_base = UMPMEM_BASE_UART2;
edge_port->dma_address = UMPD_OEDB2_ADDRESS;
break;
default:
dev_err (&port->dev, "Unknown port number!!!\n");
return -ENODEV;
}
dbg ("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
__FUNCTION__, port_number, edge_port->uart_base, edge_port->dma_address);
dev = port->serial->dev;
memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
init_waitqueue_head (&edge_port->delta_msr_wait);
/* turn off loopback */
status = TIClearLoopBack (edge_port);
if (status) {
dev_err(&port->dev,"%s - cannot send clear loopback command, %d\n",
__FUNCTION__, status);
return status;
}
/* set up the port settings */
edge_set_termios (port, port->tty->termios);
/* open up the port */
/* milliseconds to timeout for DMA transfer */
transaction_timeout = 2;
edge_port->ump_read_timeout = max (20, ((transaction_timeout * 3) / 2) );
// milliseconds to timeout for DMA transfer
open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
UMP_PIPE_TRANS_TIMEOUT_ENA |
(transaction_timeout << 2));
dbg ("%s - Sending UMPC_OPEN_PORT", __FUNCTION__);
/* Tell TI to open and start the port */
status = TIWriteCommandSync (dev,
UMPC_OPEN_PORT,
(u8)(UMPM_UART1_PORT + port_number),
open_settings,
NULL,
0);
if (status) {
dev_err(&port->dev,"%s - cannot send open command, %d\n", __FUNCTION__, status);
return status;
}
/* Start the DMA? */
status = TIWriteCommandSync (dev,
UMPC_START_PORT,
(u8)(UMPM_UART1_PORT + port_number),
0,
NULL,
0);
if (status) {
dev_err(&port->dev,"%s - cannot send start DMA command, %d\n", __FUNCTION__, status);
return status;
}
/* Clear TX and RX buffers in UMP */
status = TIPurgeDataSync (port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
if (status) {
dev_err(&port->dev,"%s - cannot send clear buffers command, %d\n", __FUNCTION__, status);
return status;
}
/* Read Initial MSR */
status = TIReadVendorRequestSync (dev,
UMPC_READ_MSR, // Request
0, // wValue
(__u16)(UMPM_UART1_PORT + port_number), // wIndex (Address)
&edge_port->shadow_msr, // TransferBuffer
1); // TransferBufferLength
if (status) {
dev_err(&port->dev,"%s - cannot send read MSR command, %d\n", __FUNCTION__, status);
return status;
}
dbg ("ShadowMSR 0x%X", edge_port->shadow_msr);
/* Set Initial MCR */
edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
dbg ("ShadowMCR 0x%X", edge_port->shadow_mcr);
edge_serial = edge_port->edge_serial;
if (mutex_lock_interruptible(&edge_serial->es_lock))
return -ERESTARTSYS;
if (edge_serial->num_ports_open == 0) {
/* we are the first port to be opened, let's post the interrupt urb */
urb = edge_serial->serial->port[0]->interrupt_in_urb;
if (!urb) {
dev_err (&port->dev, "%s - no interrupt urb present, exiting\n", __FUNCTION__);
status = -EINVAL;
goto release_es_lock;
}
urb->complete = edge_interrupt_callback;
urb->context = edge_serial;
urb->dev = dev;
status = usb_submit_urb (urb, GFP_KERNEL);
if (status) {
dev_err (&port->dev, "%s - usb_submit_urb failed with value %d\n", __FUNCTION__, status);
goto release_es_lock;
}
}
/*
* reset the data toggle on the bulk endpoints to work around bug in
* host controllers where things get out of sync some times
*/
usb_clear_halt (dev, port->write_urb->pipe);
usb_clear_halt (dev, port->read_urb->pipe);
/* start up our bulk read urb */
urb = port->read_urb;
if (!urb) {
dev_err (&port->dev, "%s - no read urb present, exiting\n", __FUNCTION__);
status = -EINVAL;
goto unlink_int_urb;
}
edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
urb->complete = edge_bulk_in_callback;
urb->context = edge_port;
urb->dev = dev;
status = usb_submit_urb (urb, GFP_KERNEL);
if (status) {
dev_err (&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
goto unlink_int_urb;
}
++edge_serial->num_ports_open;
dbg("%s - exited", __FUNCTION__);
goto release_es_lock;
unlink_int_urb:
if (edge_port->edge_serial->num_ports_open == 0)
usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
release_es_lock:
mutex_unlock(&edge_serial->es_lock);
return status;
}
static void edge_close (struct usb_serial_port *port, struct file *filp)
{
struct edgeport_serial *edge_serial;
struct edgeport_port *edge_port;
int port_number;
int status;
dbg("%s - port %d", __FUNCTION__, port->number);
edge_serial = usb_get_serial_data(port->serial);
edge_port = usb_get_serial_port_data(port);
if ((edge_serial == NULL) || (edge_port == NULL))
return;
/* The bulkreadcompletion routine will check
* this flag and dump add read data */
edge_port->close_pending = 1;
/* chase the port close and flush */
TIChasePort (edge_port, (HZ*closing_wait)/100, 1);
usb_kill_urb(port->read_urb);
usb_kill_urb(port->write_urb);
edge_port->ep_write_urb_in_use = 0;
/* assuming we can still talk to the device,
* send a close port command to it */
dbg("%s - send umpc_close_port", __FUNCTION__);
port_number = port->number - port->serial->minor;
status = TIWriteCommandSync (port->serial->dev,
UMPC_CLOSE_PORT,
(__u8)(UMPM_UART1_PORT + port_number),
0,
NULL,
0);
mutex_lock(&edge_serial->es_lock);
--edge_port->edge_serial->num_ports_open;
if (edge_port->edge_serial->num_ports_open <= 0) {
/* last port is now closed, let's shut down our interrupt urb */
usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
edge_port->edge_serial->num_ports_open = 0;
}
mutex_unlock(&edge_serial->es_lock);
edge_port->close_pending = 0;
dbg("%s - exited", __FUNCTION__);
}
static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
if (count == 0) {
dbg("%s - write request of 0 bytes", __FUNCTION__);
return 0;
}
if (edge_port == NULL)
return -ENODEV;
if (edge_port->close_pending == 1)
return -ENODEV;
spin_lock_irqsave(&edge_port->ep_lock, flags);
count = edge_buf_put(edge_port->ep_out_buf, data, count);
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
edge_send(port);
return count;
}
static void edge_send(struct usb_serial_port *port)
{
int count, result;
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct tty_struct *tty = port->tty;
unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
spin_lock_irqsave(&edge_port->ep_lock, flags);
if (edge_port->ep_write_urb_in_use) {
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
return;
}
count = edge_buf_get(edge_port->ep_out_buf,
port->write_urb->transfer_buffer,
port->bulk_out_size);
if (count == 0) {
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
return;
}
edge_port->ep_write_urb_in_use = 1;
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
/* set up our urb */
usb_fill_bulk_urb (port->write_urb, port->serial->dev,
usb_sndbulkpipe (port->serial->dev,
port->bulk_out_endpointAddress),
port->write_urb->transfer_buffer, count,
edge_bulk_out_callback,
port);
/* send the data out the bulk port */
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
if (result) {
dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
edge_port->ep_write_urb_in_use = 0;
// TODO: reschedule edge_send
} else {
edge_port->icount.tx += count;
}
/* wakeup any process waiting for writes to complete */
/* there is now more room in the buffer for new writes */
if (tty) {
/* let the tty driver wakeup if it has a special write_wakeup function */
tty_wakeup(tty);
}
}
static int edge_write_room (struct usb_serial_port *port)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int room = 0;
unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
if (edge_port == NULL)
return -ENODEV;
if (edge_port->close_pending == 1)
return -ENODEV;
spin_lock_irqsave(&edge_port->ep_lock, flags);
room = edge_buf_space_avail(edge_port->ep_out_buf);
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
dbg("%s - returns %d", __FUNCTION__, room);
return room;
}
static int edge_chars_in_buffer (struct usb_serial_port *port)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int chars = 0;
unsigned long flags;
dbg("%s - port %d", __FUNCTION__, port->number);
if (edge_port == NULL)
return -ENODEV;
if (edge_port->close_pending == 1)
return -ENODEV;
spin_lock_irqsave(&edge_port->ep_lock, flags);
chars = edge_buf_data_avail(edge_port->ep_out_buf);
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
dbg ("%s - returns %d", __FUNCTION__, chars);
return chars;
}
static void edge_throttle (struct usb_serial_port *port)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct tty_struct *tty;
int status;
dbg("%s - port %d", __FUNCTION__, port->number);
if (edge_port == NULL)
return;
tty = port->tty;
if (!tty) {
dbg ("%s - no tty available", __FUNCTION__);
return;
}
/* if we are implementing XON/XOFF, send the stop character */
if (I_IXOFF(tty)) {
unsigned char stop_char = STOP_CHAR(tty);
status = edge_write (port, &stop_char, 1);
if (status <= 0) {
dev_err(&port->dev, "%s - failed to write stop character, %d\n", __FUNCTION__, status);
}
}
/* if we are implementing RTS/CTS, stop reads */
/* and the Edgeport will clear the RTS line */
if (C_CRTSCTS(tty))
stop_read(edge_port);
}
static void edge_unthrottle (struct usb_serial_port *port)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct tty_struct *tty;
int status;
dbg("%s - port %d", __FUNCTION__, port->number);
if (edge_port == NULL)
return;
tty = port->tty;
if (!tty) {
dbg ("%s - no tty available", __FUNCTION__);
return;
}
/* if we are implementing XON/XOFF, send the start character */
if (I_IXOFF(tty)) {
unsigned char start_char = START_CHAR(tty);
status = edge_write (port, &start_char, 1);
if (status <= 0) {
dev_err(&port->dev, "%s - failed to write start character, %d\n", __FUNCTION__, status);
}
}
/* if we are implementing RTS/CTS, restart reads */
/* are the Edgeport will assert the RTS line */
if (C_CRTSCTS(tty)) {
status = restart_read(edge_port);
if (status)
dev_err(&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
}
}
static void stop_read(struct edgeport_port *edge_port)
{
unsigned long flags;
spin_lock_irqsave(&edge_port->ep_lock, flags);
if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
edge_port->shadow_mcr &= ~MCR_RTS;
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
}
static int restart_read(struct edgeport_port *edge_port)
{
struct urb *urb;
int status = 0;
unsigned long flags;
spin_lock_irqsave(&edge_port->ep_lock, flags);
if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
urb = edge_port->port->read_urb;
urb->complete = edge_bulk_in_callback;
urb->context = edge_port;
urb->dev = edge_port->port->serial->dev;
status = usb_submit_urb(urb, GFP_ATOMIC);
}
edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
edge_port->shadow_mcr |= MCR_RTS;
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
return status;
}
static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
{
struct ump_uart_config *config;
struct tty_struct *tty;
int baud;
unsigned cflag;
int status;
int port_number = edge_port->port->number - edge_port->port->serial->minor;
dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
tty = edge_port->port->tty;
config = kmalloc (sizeof (*config), GFP_KERNEL);
if (!config) {
dev_err (&edge_port->port->dev, "%s - out of memory\n", __FUNCTION__);
return;
}
cflag = tty->termios->c_cflag;
config->wFlags = 0;
/* These flags must be set */
config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
config->bUartMode = (__u8)(edge_port->bUartMode);
switch (cflag & CSIZE) {
case CS5:
config->bDataBits = UMP_UART_CHAR5BITS;
dbg ("%s - data bits = 5", __FUNCTION__);
break;
case CS6:
config->bDataBits = UMP_UART_CHAR6BITS;
dbg ("%s - data bits = 6", __FUNCTION__);
break;
case CS7:
config->bDataBits = UMP_UART_CHAR7BITS;
dbg ("%s - data bits = 7", __FUNCTION__);
break;
default:
case CS8:
config->bDataBits = UMP_UART_CHAR8BITS;
dbg ("%s - data bits = 8", __FUNCTION__);
break;
}
if (cflag & PARENB) {
if (cflag & PARODD) {
config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
config->bParity = UMP_UART_ODDPARITY;
dbg("%s - parity = odd", __FUNCTION__);
} else {
config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
config->bParity = UMP_UART_EVENPARITY;
dbg("%s - parity = even", __FUNCTION__);
}
} else {
config->bParity = UMP_UART_NOPARITY;
dbg("%s - parity = none", __FUNCTION__);
}
if (cflag & CSTOPB) {
config->bStopBits = UMP_UART_STOPBIT2;
dbg("%s - stop bits = 2", __FUNCTION__);
} else {
config->bStopBits = UMP_UART_STOPBIT1;
dbg("%s - stop bits = 1", __FUNCTION__);
}
/* figure out the flow control settings */
if (cflag & CRTSCTS) {
config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
dbg("%s - RTS/CTS is enabled", __FUNCTION__);
} else {
dbg("%s - RTS/CTS is disabled", __FUNCTION__);
tty->hw_stopped = 0;
restart_read(edge_port);
}
/* if we are implementing XON/XOFF, set the start and stop character in the device */
if (I_IXOFF(tty) || I_IXON(tty)) {
config->cXon = START_CHAR(tty);
config->cXoff = STOP_CHAR(tty);
/* if we are implementing INBOUND XON/XOFF */
if (I_IXOFF(tty)) {
config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
dbg ("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
__FUNCTION__, config->cXon, config->cXoff);
} else {
dbg ("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
}
/* if we are implementing OUTBOUND XON/XOFF */
if (I_IXON(tty)) {
config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
dbg ("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
__FUNCTION__, config->cXon, config->cXoff);
} else {
dbg ("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
}
}
tty->termios->c_cflag &= ~CMSPAR;
/* Round the baud rate */
baud = tty_get_baud_rate(tty);
if (!baud) {
/* pick a default, any default... */
baud = 9600;
} else
tty_encode_baud_rate(tty, baud, baud);
edge_port->baud_rate = baud;
config->wBaudRate = (__u16)((461550L + baud/2) / baud);
/* FIXME: Recompute actual baud from divisor here */
dbg ("%s - baud rate = %d, wBaudRate = %d", __FUNCTION__, baud, config->wBaudRate);
dbg ("wBaudRate: %d", (int)(461550L / config->wBaudRate));
dbg ("wFlags: 0x%x", config->wFlags);
dbg ("bDataBits: %d", config->bDataBits);
dbg ("bParity: %d", config->bParity);
dbg ("bStopBits: %d", config->bStopBits);
dbg ("cXon: %d", config->cXon);
dbg ("cXoff: %d", config->cXoff);
dbg ("bUartMode: %d", config->bUartMode);
/* move the word values into big endian mode */
cpu_to_be16s (&config->wFlags);
cpu_to_be16s (&config->wBaudRate);
status = TIWriteCommandSync (edge_port->port->serial->dev,
UMPC_SET_CONFIG,
(__u8)(UMPM_UART1_PORT + port_number),
0,
(__u8 *)config,
sizeof(*config));
if (status) {
dbg ("%s - error %d when trying to write config to device",
__FUNCTION__, status);
}
kfree (config);
return;
}
static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct tty_struct *tty = port->tty;
unsigned int cflag;
cflag = tty->termios->c_cflag;
dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
tty->termios->c_cflag, tty->termios->c_iflag);
dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
old_termios->c_cflag, old_termios->c_iflag);
dbg("%s - port %d", __FUNCTION__, port->number);
if (edge_port == NULL)
return;
/* change the port settings to the new ones specified */
change_port_settings (edge_port, old_termios);
return;
}
static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
unsigned int mcr;
dbg("%s - port %d", __FUNCTION__, port->number);
mcr = edge_port->shadow_mcr;
if (set & TIOCM_RTS)
mcr |= MCR_RTS;
if (set & TIOCM_DTR)
mcr |= MCR_DTR;
if (set & TIOCM_LOOP)
mcr |= MCR_LOOPBACK;
if (clear & TIOCM_RTS)
mcr &= ~MCR_RTS;
if (clear & TIOCM_DTR)
mcr &= ~MCR_DTR;
if (clear & TIOCM_LOOP)
mcr &= ~MCR_LOOPBACK;
edge_port->shadow_mcr = mcr;
TIRestoreMCR (edge_port, mcr);
return 0;
}
static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
unsigned int result = 0;
unsigned int msr;
unsigned int mcr;
dbg("%s - port %d", __FUNCTION__, port->number);
msr = edge_port->shadow_msr;
mcr = edge_port->shadow_mcr;
result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
| ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
| ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
| ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
| ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
| ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
dbg("%s -- %x", __FUNCTION__, result);
return result;
}
static int get_serial_info (struct edgeport_port *edge_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 = edge_port->port->serial->minor;
tmp.port = edge_port->port->number;
tmp.irq = 0;
tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
tmp.baud_base = 9600;
tmp.close_delay = 5*HZ;
tmp.closing_wait = closing_wait;
// tmp.custom_divisor = state->custom_divisor;
// tmp.hub6 = state->hub6;
// tmp.io_type = state->io_type;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
}
static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
struct async_icount cnow;
struct async_icount cprev;
dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
switch (cmd) {
case TIOCINQ:
dbg("%s - (%d) TIOCINQ", __FUNCTION__, port->number);
// return get_number_bytes_avail(edge_port, (unsigned int *) arg);
break;
case TIOCSERGETLSR:
dbg("%s - (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
// return get_lsr_info(edge_port, (unsigned int *) arg);
break;
case TIOCGSERIAL:
dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
return get_serial_info(edge_port, (struct serial_struct __user *) arg);
break;
case TIOCSSERIAL:
dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
break;
case TIOCMIWAIT:
dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
cprev = edge_port->icount;
while (1) {
interruptible_sleep_on(&edge_port->delta_msr_wait);
/* see if a signal did it */
if (signal_pending(current))
return -ERESTARTSYS;
cnow = edge_port->icount;
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
return -EIO; /* no change => error */
if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
return 0;
}
cprev = cnow;
}
/* not reached */
break;
case TIOCGICOUNT:
dbg ("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
port->number, edge_port->icount.rx, edge_port->icount.tx);
if (copy_to_user((void __user *)arg, &edge_port->icount, sizeof(edge_port->icount)))
return -EFAULT;
return 0;
}
return -ENOIOCTLCMD;
}
static void edge_break (struct usb_serial_port *port, int break_state)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int status;
dbg ("%s - state = %d", __FUNCTION__, break_state);
/* chase the port close */
TIChasePort (edge_port, 0, 0);
if (break_state == -1) {
status = TISetBreak (edge_port);
} else {
status = TIClearBreak (edge_port);
}
if (status) {
dbg ("%s - error %d sending break set/clear command.",
__FUNCTION__, status);
}
}
static int edge_startup (struct usb_serial *serial)
{
struct edgeport_serial *edge_serial;
struct edgeport_port *edge_port;
struct usb_device *dev;
int status;
int i;
dev = serial->dev;
/* create our private serial structure */
edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
if (edge_serial == NULL) {
dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
return -ENOMEM;
}
mutex_init(&edge_serial->es_lock);
edge_serial->serial = serial;
usb_set_serial_data(serial, edge_serial);
status = TIDownloadFirmware (edge_serial);
if (status) {
kfree (edge_serial);
return status;
}
/* set up our port private structures */
for (i = 0; i < serial->num_ports; ++i) {
edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
if (edge_port == NULL) {
dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
goto cleanup;
}
spin_lock_init(&edge_port->ep_lock);
edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
if (edge_port->ep_out_buf == NULL) {
dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
kfree(edge_port);
goto cleanup;
}
edge_port->port = serial->port[i];
edge_port->edge_serial = edge_serial;
usb_set_serial_port_data(serial->port[i], edge_port);
edge_port->bUartMode = default_uart_mode;
}
return 0;
cleanup:
for (--i; i>=0; --i) {
edge_port = usb_get_serial_port_data(serial->port[i]);
edge_buf_free(edge_port->ep_out_buf);
kfree(edge_port);
usb_set_serial_port_data(serial->port[i], NULL);
}
kfree (edge_serial);
usb_set_serial_data(serial, NULL);
return -ENOMEM;
}
static void edge_shutdown (struct usb_serial *serial)
{
int i;
struct edgeport_port *edge_port;
dbg ("%s", __FUNCTION__);
for (i = 0; i < serial->num_ports; ++i) {
edge_port = usb_get_serial_port_data(serial->port[i]);
edge_remove_sysfs_attrs(edge_port->port);
edge_buf_free(edge_port->ep_out_buf);
kfree(edge_port);
usb_set_serial_port_data(serial->port[i], NULL);
}
kfree(usb_get_serial_data(serial));
usb_set_serial_data(serial, NULL);
}
/* Sysfs Attributes */
static ssize_t show_uart_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_serial_port *port = to_usb_serial_port(dev);
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
return sprintf(buf, "%d\n", edge_port->bUartMode);
}
static ssize_t store_uart_mode(struct device *dev,
struct device_attribute *attr, const char *valbuf, size_t count)
{
struct usb_serial_port *port = to_usb_serial_port(dev);
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
unsigned int v = simple_strtoul(valbuf, NULL, 0);
dbg("%s: setting uart_mode = %d", __FUNCTION__, v);
if (v < 256)
edge_port->bUartMode = v;
else
dev_err(dev, "%s - uart_mode %d is invalid\n", __FUNCTION__, v);
return count;
}
static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode, store_uart_mode);
static int edge_create_sysfs_attrs(struct usb_serial_port *port)
{
return device_create_file(&port->dev, &dev_attr_uart_mode);
}
static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
{
device_remove_file(&port->dev, &dev_attr_uart_mode);
return 0;
}
/* Circular Buffer */
/*
* edge_buf_alloc
*
* Allocate a circular buffer and all associated memory.
*/
static struct edge_buf *edge_buf_alloc(unsigned int size)
{
struct edge_buf *eb;
if (size == 0)
return NULL;
eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
if (eb == NULL)
return NULL;
eb->buf_buf = kmalloc(size, GFP_KERNEL);
if (eb->buf_buf == NULL) {
kfree(eb);
return NULL;
}
eb->buf_size = size;
eb->buf_get = eb->buf_put = eb->buf_buf;
return eb;
}
/*
* edge_buf_free
*
* Free the buffer and all associated memory.
*/
static void edge_buf_free(struct edge_buf *eb)
{
if (eb) {
kfree(eb->buf_buf);
kfree(eb);
}
}
/*
* edge_buf_clear
*
* Clear out all data in the circular buffer.
*/
static void edge_buf_clear(struct edge_buf *eb)
{
if (eb != NULL)
eb->buf_get = eb->buf_put;
/* equivalent to a get of all data available */
}
/*
* edge_buf_data_avail
*
* Return the number of bytes of data available in the circular
* buffer.
*/
static unsigned int edge_buf_data_avail(struct edge_buf *eb)
{
if (eb != NULL)
return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
else
return 0;
}
/*
* edge_buf_space_avail
*
* Return the number of bytes of space available in the circular
* buffer.
*/
static unsigned int edge_buf_space_avail(struct edge_buf *eb)
{
if (eb != NULL)
return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
else
return 0;
}
/*
* edge_buf_put
*
* Copy data data from a user buffer and put it into the circular buffer.
* Restrict to the amount of space available.
*
* Return the number of bytes copied.
*/
static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
unsigned int count)
{
unsigned int len;
if (eb == NULL)
return 0;
len = edge_buf_space_avail(eb);
if (count > len)
count = len;
if (count == 0)
return 0;
len = eb->buf_buf + eb->buf_size - eb->buf_put;
if (count > len) {
memcpy(eb->buf_put, buf, len);
memcpy(eb->buf_buf, buf+len, count - len);
eb->buf_put = eb->buf_buf + count - len;
} else {
memcpy(eb->buf_put, buf, count);
if (count < len)
eb->buf_put += count;
else /* count == len */
eb->buf_put = eb->buf_buf;
}
return count;
}
/*
* edge_buf_get
*
* Get data from the circular buffer and copy to the given buffer.
* Restrict to the amount of data available.
*
* Return the number of bytes copied.
*/
static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
unsigned int count)
{
unsigned int len;
if (eb == NULL)
return 0;
len = edge_buf_data_avail(eb);
if (count > len)
count = len;
if (count == 0)
return 0;
len = eb->buf_buf + eb->buf_size - eb->buf_get;
if (count > len) {
memcpy(buf, eb->buf_get, len);
memcpy(buf+len, eb->buf_buf, count - len);
eb->buf_get = eb->buf_buf + count - len;
} else {
memcpy(buf, eb->buf_get, count);
if (count < len)
eb->buf_get += count;
else /* count == len */
eb->buf_get = eb->buf_buf;
}
return count;
}
static struct usb_serial_driver edgeport_1port_device = {
.driver = {
.owner = THIS_MODULE,
.name = "edgeport_ti_1",
},
.description = "Edgeport TI 1 port adapter",
.usb_driver = &io_driver,
.id_table = edgeport_1port_id_table,
.num_interrupt_in = 1,
.num_bulk_in = 1,
.num_bulk_out = 1,
.num_ports = 1,
.open = edge_open,
.close = edge_close,
.throttle = edge_throttle,
.unthrottle = edge_unthrottle,
.attach = edge_startup,
.shutdown = edge_shutdown,
.port_probe = edge_create_sysfs_attrs,
.ioctl = edge_ioctl,
.set_termios = edge_set_termios,
.tiocmget = edge_tiocmget,
.tiocmset = edge_tiocmset,
.write = edge_write,
.write_room = edge_write_room,
.chars_in_buffer = edge_chars_in_buffer,
.break_ctl = edge_break,
.read_int_callback = edge_interrupt_callback,
.read_bulk_callback = edge_bulk_in_callback,
.write_bulk_callback = edge_bulk_out_callback,
};
static struct usb_serial_driver edgeport_2port_device = {
.driver = {
.owner = THIS_MODULE,
.name = "edgeport_ti_2",
},
.description = "Edgeport TI 2 port adapter",
.usb_driver = &io_driver,
.id_table = edgeport_2port_id_table,
.num_interrupt_in = 1,
.num_bulk_in = 2,
.num_bulk_out = 2,
.num_ports = 2,
.open = edge_open,
.close = edge_close,
.throttle = edge_throttle,
.unthrottle = edge_unthrottle,
.attach = edge_startup,
.shutdown = edge_shutdown,
.port_probe = edge_create_sysfs_attrs,
.ioctl = edge_ioctl,
.set_termios = edge_set_termios,
.tiocmget = edge_tiocmget,
.tiocmset = edge_tiocmset,
.write = edge_write,
.write_room = edge_write_room,
.chars_in_buffer = edge_chars_in_buffer,
.break_ctl = edge_break,
.read_int_callback = edge_interrupt_callback,
.read_bulk_callback = edge_bulk_in_callback,
.write_bulk_callback = edge_bulk_out_callback,
};
static int __init edgeport_init(void)
{
int retval;
retval = usb_serial_register(&edgeport_1port_device);
if (retval)
goto failed_1port_device_register;
retval = usb_serial_register(&edgeport_2port_device);
if (retval)
goto failed_2port_device_register;
retval = usb_register(&io_driver);
if (retval)
goto failed_usb_register;
info(DRIVER_DESC " " DRIVER_VERSION);
return 0;
failed_usb_register:
usb_serial_deregister(&edgeport_2port_device);
failed_2port_device_register:
usb_serial_deregister(&edgeport_1port_device);
failed_1port_device_register:
return retval;
}
static void __exit edgeport_exit (void)
{
usb_deregister (&io_driver);
usb_serial_deregister (&edgeport_1port_device);
usb_serial_deregister (&edgeport_2port_device);
}
module_init(edgeport_init);
module_exit(edgeport_exit);
/* Module information */
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(low_latency, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
module_param(closing_wait, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ignore_cpu_rev, "Ignore the cpu revision when connecting to a device");
module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
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