diff options
Diffstat (limited to 'drivers/usb/serial/io_ti.c')
| -rw-r--r-- | drivers/usb/serial/io_ti.c | 3091 |
1 files changed, 3091 insertions, 0 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c new file mode 100644 index 000000000000..6c96fdaec36e --- /dev/null +++ b/drivers/usb/serial/io_ti.c @@ -0,0 +1,3091 @@ +/* + * 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/config.h> +#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/serial.h> +#include <linux/ioctl.h> +#include <asm/uaccess.h> +#include <asm/semaphore.h> +#include <linux/usb.h> + +#include "usb-serial.h" +#include "io_16654.h" +#include "io_usbvend.h" +#include "io_ti.h" + +/* + * Version Information + */ +#define DRIVER_VERSION "v0.7" +#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 semaphore es_sem; + 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-port shows up as two 2-port devices + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, + { } +}; + +/* 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) }, + { } +}; + +MODULE_DEVICE_TABLE (usb, id_table_combined); + +static struct usb_driver io_driver = { + .owner = THIS_MODULE, + .name = "io_ti", + .probe = usb_serial_probe, + .disconnect = usb_serial_disconnect, + .id_table = id_table_combined, +}; + + +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 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 termios *old_termios); +static void edge_send(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 pt_regs *regs) +{ + 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 status; + __u8 lsr; + __u8 msr; + + dbg("%s", __FUNCTION__); + + 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: + dev_err(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __FUNCTION__, urb->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: + status = usb_submit_urb (urb, GFP_ATOMIC); + if (status) + dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", + __FUNCTION__, status); +} + +static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs) +{ + struct edgeport_port *edge_port = (struct edgeport_port *)urb->context; + unsigned char *data = urb->transfer_buffer; + struct tty_struct *tty; + int status = 0; + int port_number; + + dbg("%s", __FUNCTION__); + + 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: + dev_err (&urb->dev->dev,"%s - nonzero read bulk status received: %d\n", + __FUNCTION__, urb->status ); + } + + if (urb->status == -EPIPE) + goto exit; + + if (urb->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; + status = 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 (status) + dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", + __FUNCTION__, status); +} + +static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length) +{ + int cnt; + + do { + if (tty->flip.count >= TTY_FLIPBUF_SIZE) { + tty_flip_buffer_push(tty); + if (tty->flip.count >= TTY_FLIPBUF_SIZE) { + dev_err(dev, "%s - dropping data, %d bytes lost\n", + __FUNCTION__, length); + return; + } + } + cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count); + memcpy(tty->flip.char_buf_ptr, data, cnt); + memset(tty->flip.flag_buf_ptr, 0, cnt); + tty->flip.char_buf_ptr += cnt; + tty->flip.flag_buf_ptr += cnt; + tty->flip.count += cnt; + data += cnt; + length -= cnt; + } while (length > 0); + + tty_flip_buffer_push(tty); +} + +static void edge_bulk_out_callback (struct urb *urb, struct pt_regs *regs) +{ + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + dbg ("%s - port %d", __FUNCTION__, port->number); + + edge_port->ep_write_urb_in_use = 0; + + 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: + dev_err (&urb->dev->dev,"%s - nonzero write bulk status received: %d\n", + __FUNCTION__, urb->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, NULL); + + /* 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 (down_interruptible(&edge_serial->es_sem)) + 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 up_es_sem; + } + 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 up_es_sem; + } + } + + /* + * 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 up_es_sem; + +unlink_int_urb: + if (edge_port->edge_serial->num_ports_open == 0) + usb_kill_urb(port->serial->port[0]->interrupt_in_urb); +up_es_sem: + up(&edge_serial->es_sem); + 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); + down(&edge_serial->es_sem); + --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; + } + up(&edge_serial->es_sem); + 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_KERNEL); + } + 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 termios *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; + if ((!tty) || + (!tty->termios)) { + dbg("%s - no tty structures", __FUNCTION__); + return; + } + + 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__); + } + } + + /* Round the baud rate */ + baud = tty_get_baud_rate(tty); + if (!baud) { + /* pick a default, any default... */ + baud = 9600; + } + edge_port->baud_rate = baud; + config->wBaudRate = (__u16)((461550L + baud/2) / baud); + + 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 termios *old_termios) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + struct tty_struct *tty = port->tty; + unsigned int cflag; + + if (!port->tty || !port->tty->termios) { + dbg ("%s - no tty or termios", __FUNCTION__); + return; + } + + cflag = tty->termios->c_cflag; + /* check that they really want us to change something */ + if (old_termios) { + if (cflag == old_termios->c_cflag && + tty->termios->c_iflag == old_termios->c_iflag) { + dbg ("%s - nothing to change", __FUNCTION__); + return; + } + } + + dbg("%s - clfag %08x iflag %08x", __FUNCTION__, + tty->termios->c_cflag, tty->termios->c_iflag); + if (old_termios) { + 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 = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL); + if (edge_serial == NULL) { + dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); + return -ENOMEM; + } + memset (edge_serial, 0, sizeof(struct edgeport_serial)); + sema_init(&edge_serial->es_sem, 1); + 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 = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL); + if (edge_port == NULL) { + dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__); + goto cleanup; + } + memset (edge_port, 0, sizeof(struct edgeport_port)); + 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 = 0; /* Default is RS232 */ + } + + 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]); + if (edge_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); +} + + +/* 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 = (struct edge_buf *)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. + */ + +void edge_buf_free(struct edge_buf *eb) +{ + if (eb != NULL) { + if (eb->buf_buf != NULL) + 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_device_type edgeport_1port_device = { + .owner = THIS_MODULE, + .name = "Edgeport TI 1 port adapter", + .short_name = "edgeport_ti_1", + .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, + .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_device_type edgeport_2port_device = { + .owner = THIS_MODULE, + .name = "Edgeport TI 2 port adapter", + .short_name = "edgeport_ti_2", + .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, + .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"); + |