diff options
Diffstat (limited to 'drivers/usb/serial/io_edgeport.c')
| -rw-r--r-- | drivers/usb/serial/io_edgeport.c | 3254 |
1 files changed, 3254 insertions, 0 deletions
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c new file mode 100644 index 000000000..4b48ef4ad --- /dev/null +++ b/drivers/usb/serial/io_edgeport.c @@ -0,0 +1,3254 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Edgeport USB Serial Converter driver + * + * Copyright (C) 2000 Inside Out Networks, All rights reserved. + * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> + * + * Supports the following devices: + * Edgeport/4 + * Edgeport/4t + * Edgeport/2 + * Edgeport/4i + * Edgeport/2i + * Edgeport/421 + * Edgeport/21 + * Rapidport/4 + * Edgeport/8 + * Edgeport/2D8 + * Edgeport/4D8 + * Edgeport/8i + * + * 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>. + * + */ + +#include <linux/kernel.h> +#include <linux/jiffies.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/spinlock.h> +#include <linux/serial.h> +#include <linux/ioctl.h> +#include <linux/wait.h> +#include <linux/firmware.h> +#include <linux/ihex.h> +#include <linux/uaccess.h> +#include <linux/usb.h> +#include <linux/usb/serial.h> +#include "io_edgeport.h" +#include "io_ionsp.h" /* info for the iosp messages */ +#include "io_16654.h" /* 16654 UART defines */ + +#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" +#define DRIVER_DESC "Edgeport USB Serial Driver" + +#define MAX_NAME_LEN 64 + +#define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ + +static const struct usb_device_id edgeport_2port_id_table[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) }, + { } +}; + +static const struct usb_device_id edgeport_4port_id_table[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) }, + { } +}; + +static const struct usb_device_id edgeport_8port_id_table[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) }, + { } +}; + +static const struct usb_device_id Epic_port_id_table[] = { + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) }, + { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) }, + { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) }, + { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) }, + { } +}; + +/* Devices that this driver supports */ +static const struct usb_device_id id_table_combined[] = { + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) }, + { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) }, + { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) }, + { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) }, + { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) }, + { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(usb, id_table_combined); + + +/* receive port state */ +enum RXSTATE { + EXPECT_HDR1 = 0, /* Expect header byte 1 */ + EXPECT_HDR2 = 1, /* Expect header byte 2 */ + EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ + EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ +}; + + +/* Transmit Fifo + * This Transmit queue is an extension of the edgeport Rx buffer. + * The maximum amount of data buffered in both the edgeport + * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. + */ +struct TxFifo { + unsigned int head; /* index to head pointer (write) */ + unsigned int tail; /* index to tail pointer (read) */ + unsigned int count; /* Bytes in queue */ + unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ + unsigned char *fifo; /* allocated Buffer */ +}; + +/* This structure holds all of the local port information */ +struct edgeport_port { + __u16 txCredits; /* our current credits for this port */ + __u16 maxTxCredits; /* the max size of the port */ + + struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ + struct urb *write_urb; /* write URB for this port */ + bool write_in_progress; /* 'true' while a write URB is outstanding */ + spinlock_t ep_lock; + + __u8 shadowLCR; /* last LCR value received */ + __u8 shadowMCR; /* last MCR value received */ + __u8 shadowMSR; /* last MSR value received */ + __u8 shadowLSR; /* last LSR value received */ + __u8 shadowXonChar; /* last value set as XON char in Edgeport */ + __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ + __u8 validDataMask; + __u32 baudRate; + + bool open; + bool openPending; + bool commandPending; + bool closePending; + bool chaseResponsePending; + + wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ + wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ + wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ + + struct usb_serial_port *port; /* loop back to the owner of this object */ +}; + + +/* This structure holds all of the individual device information */ +struct edgeport_serial { + char name[MAX_NAME_LEN+2]; /* string name of this device */ + + struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ + struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ + struct edgeport_product_info product_info; /* Product Info */ + struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ + int is_epic; /* flag if EPiC device or not */ + + __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ + unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ + struct urb *interrupt_read_urb; /* our interrupt urb */ + + __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ + unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ + struct urb *read_urb; /* our bulk read urb */ + bool read_in_progress; + spinlock_t es_lock; + + __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ + + __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ + + enum RXSTATE rxState; /* the current state of the bulk receive processor */ + __u8 rxHeader1; /* receive header byte 1 */ + __u8 rxHeader2; /* receive header byte 2 */ + __u8 rxHeader3; /* receive header byte 3 */ + __u8 rxPort; /* the port that we are currently receiving data for */ + __u8 rxStatusCode; /* the receive status code */ + __u8 rxStatusParam; /* the receive status paramater */ + __s16 rxBytesRemaining; /* the number of port bytes left to read */ + struct usb_serial *serial; /* loop back to the owner of this object */ +}; + +/* baud rate information */ +struct divisor_table_entry { + __u32 BaudRate; + __u16 Divisor; +}; + +/* + * Define table of divisors for Rev A EdgePort/4 hardware + * These assume a 3.6864MHz crystal, the standard /16, and + * MCR.7 = 0. + */ + +static const struct divisor_table_entry divisor_table[] = { + { 50, 4608}, + { 75, 3072}, + { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ + { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ + { 150, 1536}, + { 300, 768}, + { 600, 384}, + { 1200, 192}, + { 1800, 128}, + { 2400, 96}, + { 4800, 48}, + { 7200, 32}, + { 9600, 24}, + { 14400, 16}, + { 19200, 12}, + { 38400, 6}, + { 57600, 4}, + { 115200, 2}, + { 230400, 1}, +}; + +/* Number of outstanding Command Write Urbs */ +static atomic_t CmdUrbs = ATOMIC_INIT(0); + + +/* local function prototypes */ + +/* function prototypes for all URB callbacks */ +static void edge_interrupt_callback(struct urb *urb); +static void edge_bulk_in_callback(struct urb *urb); +static void edge_bulk_out_data_callback(struct urb *urb); +static void edge_bulk_out_cmd_callback(struct urb *urb); + +/* function prototypes for the usbserial callbacks */ +static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); +static void edge_close(struct usb_serial_port *port); +static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, + const unsigned char *buf, int count); +static int edge_write_room(struct tty_struct *tty); +static int edge_chars_in_buffer(struct tty_struct *tty); +static void edge_throttle(struct tty_struct *tty); +static void edge_unthrottle(struct tty_struct *tty); +static void edge_set_termios(struct tty_struct *tty, + struct usb_serial_port *port, + struct ktermios *old_termios); +static int edge_ioctl(struct tty_struct *tty, + unsigned int cmd, unsigned long arg); +static void edge_break(struct tty_struct *tty, int break_state); +static int edge_tiocmget(struct tty_struct *tty); +static int edge_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear); +static int edge_startup(struct usb_serial *serial); +static void edge_disconnect(struct usb_serial *serial); +static void edge_release(struct usb_serial *serial); +static int edge_port_probe(struct usb_serial_port *port); +static int edge_port_remove(struct usb_serial_port *port); + +/* function prototypes for all of our local functions */ + +static void process_rcvd_data(struct edgeport_serial *edge_serial, + unsigned char *buffer, __u16 bufferLength); +static void process_rcvd_status(struct edgeport_serial *edge_serial, + __u8 byte2, __u8 byte3); +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length); +static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); +static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, + __u8 lsr, __u8 data); +static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, + __u8 param); +static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor); +static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, + int baudRate); +static void change_port_settings(struct tty_struct *tty, + struct edgeport_port *edge_port, + struct ktermios *old_termios); +static int send_cmd_write_uart_register(struct edgeport_port *edge_port, + __u8 regNum, __u8 regValue); +static int write_cmd_usb(struct edgeport_port *edge_port, + unsigned char *buffer, int writeLength); +static void send_more_port_data(struct edgeport_serial *edge_serial, + struct edgeport_port *edge_port); + +static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, + __u16 length, const __u8 *data); +static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, + __u16 length, __u8 *data); +static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, + __u16 length, const __u8 *data); +static void get_manufacturing_desc(struct edgeport_serial *edge_serial); +static void get_boot_desc(struct edgeport_serial *edge_serial); +static void load_application_firmware(struct edgeport_serial *edge_serial); + +static void unicode_to_ascii(char *string, int buflen, + __le16 *unicode, int unicode_size); + + +/* ************************************************************************ */ +/* ************************************************************************ */ +/* ************************************************************************ */ +/* ************************************************************************ */ + +/************************************************************************ + * * + * update_edgeport_E2PROM() Compare current versions of * + * Boot ROM and Manufacture * + * Descriptors with versions * + * embedded in this driver * + * * + ************************************************************************/ +static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) +{ + struct device *dev = &edge_serial->serial->dev->dev; + __u32 BootCurVer; + __u32 BootNewVer; + __u8 BootMajorVersion; + __u8 BootMinorVersion; + __u16 BootBuildNumber; + __u32 Bootaddr; + const struct ihex_binrec *rec; + const struct firmware *fw; + const char *fw_name; + int response; + + switch (edge_serial->product_info.iDownloadFile) { + case EDGE_DOWNLOAD_FILE_I930: + fw_name = "edgeport/boot.fw"; + break; + case EDGE_DOWNLOAD_FILE_80251: + fw_name = "edgeport/boot2.fw"; + break; + default: + return; + } + + response = request_ihex_firmware(&fw, fw_name, + &edge_serial->serial->dev->dev); + if (response) { + dev_err(dev, "Failed to load image \"%s\" err %d\n", + fw_name, response); + return; + } + + rec = (const struct ihex_binrec *)fw->data; + BootMajorVersion = rec->data[0]; + BootMinorVersion = rec->data[1]; + BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; + + /* Check Boot Image Version */ + BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + + (edge_serial->boot_descriptor.MinorVersion << 16) + + le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); + + BootNewVer = (BootMajorVersion << 24) + + (BootMinorVersion << 16) + + BootBuildNumber; + + dev_dbg(dev, "Current Boot Image version %d.%d.%d\n", + edge_serial->boot_descriptor.MajorVersion, + edge_serial->boot_descriptor.MinorVersion, + le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); + + + if (BootNewVer > BootCurVer) { + dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n", + edge_serial->boot_descriptor.MajorVersion, + edge_serial->boot_descriptor.MinorVersion, + le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), + BootMajorVersion, BootMinorVersion, BootBuildNumber); + + dev_dbg(dev, "Downloading new Boot Image\n"); + + for (rec = ihex_next_binrec(rec); rec; + rec = ihex_next_binrec(rec)) { + Bootaddr = be32_to_cpu(rec->addr); + response = rom_write(edge_serial->serial, + Bootaddr >> 16, + Bootaddr & 0xFFFF, + be16_to_cpu(rec->len), + &rec->data[0]); + if (response < 0) { + dev_err(&edge_serial->serial->dev->dev, + "rom_write failed (%x, %x, %d)\n", + Bootaddr >> 16, Bootaddr & 0xFFFF, + be16_to_cpu(rec->len)); + break; + } + } + } else { + dev_dbg(dev, "Boot Image -- already up to date\n"); + } + release_firmware(fw); +} + +#if 0 +/************************************************************************ + * + * Get string descriptor from device + * + ************************************************************************/ +static int get_string_desc(struct usb_device *dev, int Id, + struct usb_string_descriptor **pRetDesc) +{ + struct usb_string_descriptor StringDesc; + struct usb_string_descriptor *pStringDesc; + + dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id); + + if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, + sizeof(StringDesc))) + return 0; + + pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); + if (!pStringDesc) + return -1; + + if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, + StringDesc.bLength)) { + kfree(pStringDesc); + return -1; + } + + *pRetDesc = pStringDesc; + return 0; +} +#endif + +static void dump_product_info(struct edgeport_serial *edge_serial, + struct edgeport_product_info *product_info) +{ + struct device *dev = &edge_serial->serial->dev->dev; + + /* Dump Product Info structure */ + dev_dbg(dev, "**Product Information:\n"); + dev_dbg(dev, " ProductId %x\n", product_info->ProductId); + dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts); + dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer); + dev_dbg(dev, " IsServer %d\n", product_info->IsServer); + dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232); + dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422); + dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485); + dev_dbg(dev, " RomSize %d\n", product_info->RomSize); + dev_dbg(dev, " RamSize %d\n", product_info->RamSize); + dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev); + dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev); + dev_dbg(dev, " BootMajorVersion %d.%d.%d\n", + product_info->BootMajorVersion, + product_info->BootMinorVersion, + le16_to_cpu(product_info->BootBuildNumber)); + dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n", + product_info->FirmwareMajorVersion, + product_info->FirmwareMinorVersion, + le16_to_cpu(product_info->FirmwareBuildNumber)); + dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n", + product_info->ManufactureDescDate[0], + product_info->ManufactureDescDate[1], + product_info->ManufactureDescDate[2]+1900); + dev_dbg(dev, " iDownloadFile 0x%x\n", + product_info->iDownloadFile); + dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer); +} + +static void get_product_info(struct edgeport_serial *edge_serial) +{ + struct edgeport_product_info *product_info = &edge_serial->product_info; + + memset(product_info, 0, sizeof(struct edgeport_product_info)); + + product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); + product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; + product_info->ProdInfoVer = 0; + + product_info->RomSize = edge_serial->manuf_descriptor.RomSize; + product_info->RamSize = edge_serial->manuf_descriptor.RamSize; + product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; + product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; + + product_info->BootMajorVersion = + edge_serial->boot_descriptor.MajorVersion; + product_info->BootMinorVersion = + edge_serial->boot_descriptor.MinorVersion; + product_info->BootBuildNumber = + edge_serial->boot_descriptor.BuildNumber; + + memcpy(product_info->ManufactureDescDate, + edge_serial->manuf_descriptor.DescDate, + sizeof(edge_serial->manuf_descriptor.DescDate)); + + /* check if this is 2nd generation hardware */ + if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) + & ION_DEVICE_ID_80251_NETCHIP) + product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; + else + product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; + + /* Determine Product type and set appropriate flags */ + switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { + case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: + case ION_DEVICE_ID_EDGEPORT_4T: + case ION_DEVICE_ID_EDGEPORT_4: + case ION_DEVICE_ID_EDGEPORT_2: + case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: + case ION_DEVICE_ID_EDGEPORT_8: + case ION_DEVICE_ID_EDGEPORT_421: + case ION_DEVICE_ID_EDGEPORT_21: + case ION_DEVICE_ID_EDGEPORT_2_DIN: + case ION_DEVICE_ID_EDGEPORT_4_DIN: + case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: + product_info->IsRS232 = 1; + break; + + case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ + product_info->IsRS422 = 1; + product_info->IsRS485 = 1; + break; + + case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ + case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ + product_info->IsRS422 = 1; + break; + } + + dump_product_info(edge_serial, product_info); +} + +static int get_epic_descriptor(struct edgeport_serial *ep) +{ + int result; + struct usb_serial *serial = ep->serial; + struct edgeport_product_info *product_info = &ep->product_info; + struct edge_compatibility_descriptor *epic; + struct edge_compatibility_bits *bits; + struct device *dev = &serial->dev->dev; + + ep->is_epic = 0; + + epic = kmalloc(sizeof(*epic), GFP_KERNEL); + if (!epic) + return -ENOMEM; + + result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), + USB_REQUEST_ION_GET_EPIC_DESC, + 0xC0, 0x00, 0x00, + epic, sizeof(*epic), + 300); + if (result == sizeof(*epic)) { + ep->is_epic = 1; + memcpy(&ep->epic_descriptor, epic, sizeof(*epic)); + memset(product_info, 0, sizeof(struct edgeport_product_info)); + + product_info->NumPorts = epic->NumPorts; + product_info->ProdInfoVer = 0; + product_info->FirmwareMajorVersion = epic->MajorVersion; + product_info->FirmwareMinorVersion = epic->MinorVersion; + product_info->FirmwareBuildNumber = epic->BuildNumber; + product_info->iDownloadFile = epic->iDownloadFile; + product_info->EpicVer = epic->EpicVer; + product_info->Epic = epic->Supports; + product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; + dump_product_info(ep, product_info); + + bits = &ep->epic_descriptor.Supports; + dev_dbg(dev, "**EPIC descriptor:\n"); + dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE"); + dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); + dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE"); + + result = 0; + } else if (result >= 0) { + dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n", + result); + result = -EIO; + } + + kfree(epic); + + return result; +} + + +/************************************************************************/ +/************************************************************************/ +/* U S B C A L L B A C K F U N C T I O N S */ +/* U S B C A L L B A C K F U N C T I O N S */ +/************************************************************************/ +/************************************************************************/ + +/***************************************************************************** + * edge_interrupt_callback + * this is the callback function for when we have received data on the + * interrupt endpoint. + *****************************************************************************/ +static void edge_interrupt_callback(struct urb *urb) +{ + struct edgeport_serial *edge_serial = urb->context; + struct device *dev; + struct edgeport_port *edge_port; + struct usb_serial_port *port; + unsigned char *data = urb->transfer_buffer; + int length = urb->actual_length; + unsigned long flags; + int bytes_avail; + int position; + int txCredits; + int portNumber; + int result; + int status = urb->status; + + switch (status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); + return; + default: + dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); + goto exit; + } + + dev = &edge_serial->serial->dev->dev; + + /* process this interrupt-read even if there are no ports open */ + if (length) { + usb_serial_debug_data(dev, __func__, length, data); + + if (length > 1) { + bytes_avail = data[0] | (data[1] << 8); + if (bytes_avail) { + spin_lock_irqsave(&edge_serial->es_lock, flags); + edge_serial->rxBytesAvail += bytes_avail; + dev_dbg(dev, + "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n", + __func__, bytes_avail, + edge_serial->rxBytesAvail, + edge_serial->read_in_progress); + + if (edge_serial->rxBytesAvail > 0 && + !edge_serial->read_in_progress) { + dev_dbg(dev, "%s - posting a read\n", __func__); + edge_serial->read_in_progress = true; + + /* we have pending bytes on the + bulk in pipe, send a request */ + result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); + if (result) { + dev_err(dev, + "%s - usb_submit_urb(read bulk) failed with result = %d\n", + __func__, result); + edge_serial->read_in_progress = false; + } + } + spin_unlock_irqrestore(&edge_serial->es_lock, + flags); + } + } + /* grab the txcredits for the ports if available */ + position = 2; + portNumber = 0; + while ((position < length - 1) && + (portNumber < edge_serial->serial->num_ports)) { + txCredits = data[position] | (data[position+1] << 8); + if (txCredits) { + port = edge_serial->serial->port[portNumber]; + edge_port = usb_get_serial_port_data(port); + if (edge_port && edge_port->open) { + spin_lock_irqsave(&edge_port->ep_lock, + flags); + edge_port->txCredits += txCredits; + spin_unlock_irqrestore(&edge_port->ep_lock, + flags); + dev_dbg(dev, "%s - txcredits for port%d = %d\n", + __func__, portNumber, + edge_port->txCredits); + + /* tell the tty driver that something + has changed */ + tty_port_tty_wakeup(&edge_port->port->port); + /* Since we have more credit, check + if more data can be sent */ + send_more_port_data(edge_serial, + edge_port); + } + } + position += 2; + ++portNumber; + } + } + +exit: + result = usb_submit_urb(urb, GFP_ATOMIC); + if (result) + dev_err(&urb->dev->dev, + "%s - Error %d submitting control urb\n", + __func__, result); +} + + +/***************************************************************************** + * edge_bulk_in_callback + * this is the callback function for when we have received data on the + * bulk in endpoint. + *****************************************************************************/ +static void edge_bulk_in_callback(struct urb *urb) +{ + struct edgeport_serial *edge_serial = urb->context; + struct device *dev; + unsigned char *data = urb->transfer_buffer; + int retval; + __u16 raw_data_length; + int status = urb->status; + unsigned long flags; + + if (status) { + dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", + __func__, status); + edge_serial->read_in_progress = false; + return; + } + + if (urb->actual_length == 0) { + dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__); + edge_serial->read_in_progress = false; + return; + } + + dev = &edge_serial->serial->dev->dev; + raw_data_length = urb->actual_length; + + usb_serial_debug_data(dev, __func__, raw_data_length, data); + + spin_lock_irqsave(&edge_serial->es_lock, flags); + + /* decrement our rxBytes available by the number that we just got */ + edge_serial->rxBytesAvail -= raw_data_length; + + dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__, + raw_data_length, edge_serial->rxBytesAvail); + + process_rcvd_data(edge_serial, data, urb->actual_length); + + /* check to see if there's any more data for us to read */ + if (edge_serial->rxBytesAvail > 0) { + dev_dbg(dev, "%s - posting a read\n", __func__); + retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); + if (retval) { + dev_err(dev, + "%s - usb_submit_urb(read bulk) failed, retval = %d\n", + __func__, retval); + edge_serial->read_in_progress = false; + } + } else { + edge_serial->read_in_progress = false; + } + + spin_unlock_irqrestore(&edge_serial->es_lock, flags); +} + + +/***************************************************************************** + * edge_bulk_out_data_callback + * this is the callback function for when we have finished sending + * serial data on the bulk out endpoint. + *****************************************************************************/ +static void edge_bulk_out_data_callback(struct urb *urb) +{ + struct edgeport_port *edge_port = urb->context; + int status = urb->status; + + if (status) { + dev_dbg(&urb->dev->dev, + "%s - nonzero write bulk status received: %d\n", + __func__, status); + } + + if (edge_port->open) + tty_port_tty_wakeup(&edge_port->port->port); + + /* Release the Write URB */ + edge_port->write_in_progress = false; + + /* Check if more data needs to be sent */ + send_more_port_data((struct edgeport_serial *) + (usb_get_serial_data(edge_port->port->serial)), edge_port); +} + + +/***************************************************************************** + * BulkOutCmdCallback + * this is the callback function for when we have finished sending a + * command on the bulk out endpoint. + *****************************************************************************/ +static void edge_bulk_out_cmd_callback(struct urb *urb) +{ + struct edgeport_port *edge_port = urb->context; + int status = urb->status; + + atomic_dec(&CmdUrbs); + dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n", + __func__, urb, atomic_read(&CmdUrbs)); + + + /* clean up the transfer buffer */ + kfree(urb->transfer_buffer); + + /* Free the command urb */ + usb_free_urb(urb); + + if (status) { + dev_dbg(&urb->dev->dev, + "%s - nonzero write bulk status received: %d\n", + __func__, status); + return; + } + + /* tell the tty driver that something has changed */ + if (edge_port->open) + tty_port_tty_wakeup(&edge_port->port->port); + + /* we have completed the command */ + edge_port->commandPending = false; + wake_up(&edge_port->wait_command); +} + + +/***************************************************************************** + * Driver tty interface functions + *****************************************************************************/ + +/***************************************************************************** + * SerialOpen + * this function is called by the tty driver when a port is opened + * If successful, we return 0 + * Otherwise we return a negative error number. + *****************************************************************************/ +static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + struct device *dev = &port->dev; + struct usb_serial *serial; + struct edgeport_serial *edge_serial; + int response; + + if (edge_port == NULL) + return -ENODEV; + + /* see if we've set up our endpoint info yet (can't set it up + in edge_startup as the structures were not set up at that time.) */ + serial = port->serial; + edge_serial = usb_get_serial_data(serial); + if (edge_serial == NULL) + return -ENODEV; + if (edge_serial->interrupt_in_buffer == NULL) { + struct usb_serial_port *port0 = serial->port[0]; + + /* not set up yet, so do it now */ + edge_serial->interrupt_in_buffer = + port0->interrupt_in_buffer; + edge_serial->interrupt_in_endpoint = + port0->interrupt_in_endpointAddress; + edge_serial->interrupt_read_urb = port0->interrupt_in_urb; + edge_serial->bulk_in_buffer = port0->bulk_in_buffer; + edge_serial->bulk_in_endpoint = + port0->bulk_in_endpointAddress; + edge_serial->read_urb = port0->read_urb; + edge_serial->bulk_out_endpoint = + port0->bulk_out_endpointAddress; + + /* set up our interrupt urb */ + usb_fill_int_urb(edge_serial->interrupt_read_urb, + serial->dev, + usb_rcvintpipe(serial->dev, + port0->interrupt_in_endpointAddress), + port0->interrupt_in_buffer, + edge_serial->interrupt_read_urb->transfer_buffer_length, + edge_interrupt_callback, edge_serial, + edge_serial->interrupt_read_urb->interval); + + /* set up our bulk in urb */ + usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, + usb_rcvbulkpipe(serial->dev, + port0->bulk_in_endpointAddress), + port0->bulk_in_buffer, + edge_serial->read_urb->transfer_buffer_length, + edge_bulk_in_callback, edge_serial); + edge_serial->read_in_progress = false; + + /* start interrupt read for this edgeport + * this interrupt will continue as long + * as the edgeport is connected */ + response = usb_submit_urb(edge_serial->interrupt_read_urb, + GFP_KERNEL); + if (response) { + dev_err(dev, "%s - Error %d submitting control urb\n", + __func__, response); + } + } + + /* initialize our wait queues */ + init_waitqueue_head(&edge_port->wait_open); + init_waitqueue_head(&edge_port->wait_chase); + init_waitqueue_head(&edge_port->wait_command); + + /* initialize our port settings */ + edge_port->txCredits = 0; /* Can't send any data yet */ + /* Must always set this bit to enable ints! */ + edge_port->shadowMCR = MCR_MASTER_IE; + edge_port->chaseResponsePending = false; + + /* send a open port command */ + edge_port->openPending = true; + edge_port->open = false; + response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); + + if (response < 0) { + dev_err(dev, "%s - error sending open port command\n", __func__); + edge_port->openPending = false; + return -ENODEV; + } + + /* now wait for the port to be completely opened */ + wait_event_timeout(edge_port->wait_open, !edge_port->openPending, + OPEN_TIMEOUT); + + if (!edge_port->open) { + /* open timed out */ + dev_dbg(dev, "%s - open timedout\n", __func__); + edge_port->openPending = false; + return -ENODEV; + } + + /* create the txfifo */ + edge_port->txfifo.head = 0; + edge_port->txfifo.tail = 0; + edge_port->txfifo.count = 0; + edge_port->txfifo.size = edge_port->maxTxCredits; + edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); + + if (!edge_port->txfifo.fifo) { + edge_close(port); + return -ENOMEM; + } + + /* Allocate a URB for the write */ + edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); + edge_port->write_in_progress = false; + + if (!edge_port->write_urb) { + edge_close(port); + return -ENOMEM; + } + + dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n", + __func__, edge_port->maxTxCredits); + + return 0; +} + + +/************************************************************************ + * + * block_until_chase_response + * + * This function will block the close until one of the following: + * 1. Response to our Chase comes from Edgeport + * 2. A timeout of 10 seconds without activity has expired + * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) + * + ************************************************************************/ +static void block_until_chase_response(struct edgeport_port *edge_port) +{ + struct device *dev = &edge_port->port->dev; + DEFINE_WAIT(wait); + __u16 lastCredits; + int timeout = 1*HZ; + int loop = 10; + + while (1) { + /* Save Last credits */ + lastCredits = edge_port->txCredits; + + /* Did we get our Chase response */ + if (!edge_port->chaseResponsePending) { + dev_dbg(dev, "%s - Got Chase Response\n", __func__); + + /* did we get all of our credit back? */ + if (edge_port->txCredits == edge_port->maxTxCredits) { + dev_dbg(dev, "%s - Got all credits\n", __func__); + return; + } + } + + /* Block the thread for a while */ + prepare_to_wait(&edge_port->wait_chase, &wait, + TASK_UNINTERRUPTIBLE); + schedule_timeout(timeout); + finish_wait(&edge_port->wait_chase, &wait); + + if (lastCredits == edge_port->txCredits) { + /* No activity.. count down. */ + loop--; + if (loop == 0) { + edge_port->chaseResponsePending = false; + dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__); + return; + } + } else { + /* Reset timeout value back to 10 seconds */ + dev_dbg(dev, "%s - Last %d, Current %d\n", __func__, + lastCredits, edge_port->txCredits); + loop = 10; + } + } +} + + +/************************************************************************ + * + * block_until_tx_empty + * + * This function will block the close until one of the following: + * 1. TX count are 0 + * 2. The edgeport has stopped + * 3. A timeout of 3 seconds without activity has expired + * + ************************************************************************/ +static void block_until_tx_empty(struct edgeport_port *edge_port) +{ + struct device *dev = &edge_port->port->dev; + DEFINE_WAIT(wait); + struct TxFifo *fifo = &edge_port->txfifo; + __u32 lastCount; + int timeout = HZ/10; + int loop = 30; + + while (1) { + /* Save Last count */ + lastCount = fifo->count; + + /* Is the Edgeport Buffer empty? */ + if (lastCount == 0) { + dev_dbg(dev, "%s - TX Buffer Empty\n", __func__); + return; + } + + /* Block the thread for a while */ + prepare_to_wait(&edge_port->wait_chase, &wait, + TASK_UNINTERRUPTIBLE); + schedule_timeout(timeout); + finish_wait(&edge_port->wait_chase, &wait); + + dev_dbg(dev, "%s wait\n", __func__); + + if (lastCount == fifo->count) { + /* No activity.. count down. */ + loop--; + if (loop == 0) { + dev_dbg(dev, "%s - TIMEOUT\n", __func__); + return; + } + } else { + /* Reset timeout value back to seconds */ + loop = 30; + } + } +} + + +/***************************************************************************** + * edge_close + * this function is called by the tty driver when a port is closed + *****************************************************************************/ +static void edge_close(struct usb_serial_port *port) +{ + struct edgeport_serial *edge_serial; + struct edgeport_port *edge_port; + int status; + + edge_serial = usb_get_serial_data(port->serial); + edge_port = usb_get_serial_port_data(port); + if (edge_serial == NULL || edge_port == NULL) + return; + + /* block until tx is empty */ + block_until_tx_empty(edge_port); + + edge_port->closePending = true; + + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPChase) { + /* flush and chase */ + edge_port->chaseResponsePending = true; + + dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); + status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); + if (status == 0) + /* block until chase finished */ + block_until_chase_response(edge_port); + else + edge_port->chaseResponsePending = false; + } + + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPClose) { + /* close the port */ + dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__); + send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); + } + + /* port->close = true; */ + edge_port->closePending = false; + edge_port->open = false; + edge_port->openPending = false; + + usb_kill_urb(edge_port->write_urb); + + if (edge_port->write_urb) { + /* if this urb had a transfer buffer already + (old transfer) free it */ + kfree(edge_port->write_urb->transfer_buffer); + usb_free_urb(edge_port->write_urb); + edge_port->write_urb = NULL; + } + kfree(edge_port->txfifo.fifo); + edge_port->txfifo.fifo = NULL; +} + +/***************************************************************************** + * SerialWrite + * this function is called by the tty driver when data should be written + * to the port. + * If successful, we return the number of bytes written, otherwise we + * return a negative error number. + *****************************************************************************/ +static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, + const unsigned char *data, int count) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + struct TxFifo *fifo; + int copySize; + int bytesleft; + int firsthalf; + int secondhalf; + unsigned long flags; + + if (edge_port == NULL) + return -ENODEV; + + /* get a pointer to the Tx fifo */ + fifo = &edge_port->txfifo; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + + /* calculate number of bytes to put in fifo */ + copySize = min((unsigned int)count, + (edge_port->txCredits - fifo->count)); + + dev_dbg(&port->dev, "%s of %d byte(s) Fifo room %d -- will copy %d bytes\n", + __func__, count, edge_port->txCredits - fifo->count, copySize); + + /* catch writes of 0 bytes which the tty driver likes to give us, + and when txCredits is empty */ + if (copySize == 0) { + dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__); + goto finish_write; + } + + /* queue the data + * since we can never overflow the buffer we do not have to check for a + * full condition + * + * the copy is done is two parts -- first fill to the end of the buffer + * then copy the reset from the start of the buffer + */ + bytesleft = fifo->size - fifo->head; + firsthalf = min(bytesleft, copySize); + dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__, + firsthalf, bytesleft); + + /* now copy our data */ + memcpy(&fifo->fifo[fifo->head], data, firsthalf); + usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]); + + /* update the index and size */ + fifo->head += firsthalf; + fifo->count += firsthalf; + + /* wrap the index */ + if (fifo->head == fifo->size) + fifo->head = 0; + + secondhalf = copySize-firsthalf; + + if (secondhalf) { + dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf); + memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); + usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]); + /* update the index and size */ + fifo->count += secondhalf; + fifo->head += secondhalf; + /* No need to check for wrap since we can not get to end of + * the fifo in this part + */ + } + +finish_write: + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + send_more_port_data((struct edgeport_serial *) + usb_get_serial_data(port->serial), edge_port); + + dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n", + __func__, copySize, edge_port->txCredits, fifo->count); + + return copySize; +} + + +/************************************************************************ + * + * send_more_port_data() + * + * This routine attempts to write additional UART transmit data + * to a port over the USB bulk pipe. It is called (1) when new + * data has been written to a port's TxBuffer from higher layers + * (2) when the peripheral sends us additional TxCredits indicating + * that it can accept more Tx data for a given port; and (3) when + * a bulk write completes successfully and we want to see if we + * can transmit more. + * + ************************************************************************/ +static void send_more_port_data(struct edgeport_serial *edge_serial, + struct edgeport_port *edge_port) +{ + struct TxFifo *fifo = &edge_port->txfifo; + struct device *dev = &edge_port->port->dev; + struct urb *urb; + unsigned char *buffer; + int status; + int count; + int bytesleft; + int firsthalf; + int secondhalf; + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + + if (edge_port->write_in_progress || + !edge_port->open || + (fifo->count == 0)) { + dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n", + __func__, fifo->count, edge_port->write_in_progress); + goto exit_send; + } + + /* since the amount of data in the fifo will always fit into the + * edgeport buffer we do not need to check the write length + * + * Do we have enough credits for this port to make it worthwhile + * to bother queueing a write. If it's too small, say a few bytes, + * it's better to wait for more credits so we can do a larger write. + */ + if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { + dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n", + __func__, fifo->count, edge_port->txCredits); + goto exit_send; + } + + /* lock this write */ + edge_port->write_in_progress = true; + + /* get a pointer to the write_urb */ + urb = edge_port->write_urb; + + /* make sure transfer buffer is freed */ + kfree(urb->transfer_buffer); + urb->transfer_buffer = NULL; + + /* build the data header for the buffer and port that we are about + to send out */ + count = fifo->count; + buffer = kmalloc(count+2, GFP_ATOMIC); + if (!buffer) { + edge_port->write_in_progress = false; + goto exit_send; + } + buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count); + buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count); + + /* now copy our data */ + bytesleft = fifo->size - fifo->tail; + firsthalf = min(bytesleft, count); + memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); + fifo->tail += firsthalf; + fifo->count -= firsthalf; + if (fifo->tail == fifo->size) + fifo->tail = 0; + + secondhalf = count-firsthalf; + if (secondhalf) { + memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], + secondhalf); + fifo->tail += secondhalf; + fifo->count -= secondhalf; + } + + if (count) + usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]); + + /* fill up the urb with all of our data and submit it */ + usb_fill_bulk_urb(urb, edge_serial->serial->dev, + usb_sndbulkpipe(edge_serial->serial->dev, + edge_serial->bulk_out_endpoint), + buffer, count+2, + edge_bulk_out_data_callback, edge_port); + + /* decrement the number of credits we have by the number we just sent */ + edge_port->txCredits -= count; + edge_port->port->icount.tx += count; + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status) { + /* something went wrong */ + dev_err_console(edge_port->port, + "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", + __func__, status); + edge_port->write_in_progress = false; + + /* revert the credits as something bad happened. */ + edge_port->txCredits += count; + edge_port->port->icount.tx -= count; + } + dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n", + __func__, count, edge_port->txCredits, fifo->count); + +exit_send: + spin_unlock_irqrestore(&edge_port->ep_lock, flags); +} + + +/***************************************************************************** + * edge_write_room + * this function is called by the tty driver when it wants to know how + * many bytes of data we can accept for a specific port. If successful, + * we return the amount of room that we have for this port (the txCredits) + * otherwise we return a negative error number. + *****************************************************************************/ +static int edge_write_room(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int room; + unsigned long flags; + + if (edge_port == NULL) + return 0; + if (edge_port->closePending) + return 0; + + if (!edge_port->open) { + dev_dbg(&port->dev, "%s - port not opened\n", __func__); + return 0; + } + + /* total of both buffers is still txCredit */ + spin_lock_irqsave(&edge_port->ep_lock, flags); + room = edge_port->txCredits - edge_port->txfifo.count; + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); + return room; +} + + +/***************************************************************************** + * edge_chars_in_buffer + * this function is called by the tty driver when it wants to know how + * many bytes of data we currently have outstanding in the port (data that + * has been written, but hasn't made it out the port yet) + * If successful, we return the number of bytes left to be written in the + * system, + * Otherwise we return a negative error number. + *****************************************************************************/ +static int edge_chars_in_buffer(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int num_chars; + unsigned long flags; + + if (edge_port == NULL) + return 0; + if (edge_port->closePending) + return 0; + + if (!edge_port->open) { + dev_dbg(&port->dev, "%s - port not opened\n", __func__); + return 0; + } + + spin_lock_irqsave(&edge_port->ep_lock, flags); + num_chars = edge_port->maxTxCredits - edge_port->txCredits + + edge_port->txfifo.count; + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + if (num_chars) { + dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars); + } + + return num_chars; +} + + +/***************************************************************************** + * SerialThrottle + * this function is called by the tty driver when it wants to stop the data + * being read from the port. + *****************************************************************************/ +static void edge_throttle(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int status; + + if (edge_port == NULL) + return; + + if (!edge_port->open) { + dev_dbg(&port->dev, "%s - port not opened\n", __func__); + return; + } + + /* if we are implementing XON/XOFF, send the stop character */ + if (I_IXOFF(tty)) { + unsigned char stop_char = STOP_CHAR(tty); + status = edge_write(tty, port, &stop_char, 1); + if (status <= 0) + return; + } + + /* if we are implementing RTS/CTS, toggle that line */ + if (C_CRTSCTS(tty)) { + edge_port->shadowMCR &= ~MCR_RTS; + status = send_cmd_write_uart_register(edge_port, MCR, + edge_port->shadowMCR); + if (status != 0) + return; + } +} + + +/***************************************************************************** + * edge_unthrottle + * this function is called by the tty driver when it wants to resume the + * data being read from the port (called after SerialThrottle is called) + *****************************************************************************/ +static void edge_unthrottle(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + int status; + + if (edge_port == NULL) + return; + + if (!edge_port->open) { + dev_dbg(&port->dev, "%s - port not opened\n", __func__); + return; + } + + /* if we are implementing XON/XOFF, send the start character */ + if (I_IXOFF(tty)) { + unsigned char start_char = START_CHAR(tty); + status = edge_write(tty, port, &start_char, 1); + if (status <= 0) + return; + } + /* if we are implementing RTS/CTS, toggle that line */ + if (C_CRTSCTS(tty)) { + edge_port->shadowMCR |= MCR_RTS; + send_cmd_write_uart_register(edge_port, MCR, + edge_port->shadowMCR); + } +} + + +/***************************************************************************** + * SerialSetTermios + * this function is called by the tty driver when it wants to change + * the termios structure + *****************************************************************************/ +static void edge_set_termios(struct tty_struct *tty, + struct usb_serial_port *port, struct ktermios *old_termios) +{ + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + if (edge_port == NULL) + return; + + if (!edge_port->open) { + dev_dbg(&port->dev, "%s - port not opened\n", __func__); + return; + } + + /* change the port settings to the new ones specified */ + change_port_settings(tty, edge_port, old_termios); +} + + +/***************************************************************************** + * get_lsr_info - get line status register info + * + * Purpose: Let user call ioctl() to get info when the UART physically + * is emptied. On bus types like RS485, the transmitter must + * release the bus after transmitting. This must be done when + * the transmit shift register is empty, not be done when the + * transmit holding register is empty. This functionality + * allows an RS485 driver to be written in user space. + *****************************************************************************/ +static int get_lsr_info(struct edgeport_port *edge_port, + unsigned int __user *value) +{ + unsigned int result = 0; + unsigned long flags; + + spin_lock_irqsave(&edge_port->ep_lock, flags); + if (edge_port->maxTxCredits == edge_port->txCredits && + edge_port->txfifo.count == 0) { + dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__); + result = TIOCSER_TEMT; + } + spin_unlock_irqrestore(&edge_port->ep_lock, flags); + + if (copy_to_user(value, &result, sizeof(int))) + return -EFAULT; + return 0; +} + +static int edge_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned int mcr; + + mcr = edge_port->shadowMCR; + 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->shadowMCR = mcr; + + send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); + + return 0; +} + +static int edge_tiocmget(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + unsigned int result = 0; + unsigned int msr; + unsigned int mcr; + + msr = edge_port->shadowMSR; + mcr = edge_port->shadowMCR; + 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 */ + + return result; +} + +static int get_serial_info(struct tty_struct *tty, + struct serial_struct *ss) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + ss->type = PORT_16550A; + ss->line = edge_port->port->minor; + ss->port = edge_port->port->port_number; + ss->irq = 0; + ss->xmit_fifo_size = edge_port->maxTxCredits; + ss->baud_base = 9600; + ss->close_delay = 5*HZ; + ss->closing_wait = 30*HZ; + return 0; +} + + +/***************************************************************************** + * SerialIoctl + * this function handles any ioctl calls to the driver + *****************************************************************************/ +static int edge_ioctl(struct tty_struct *tty, + unsigned int cmd, unsigned long arg) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + + switch (cmd) { + case TIOCSERGETLSR: + dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); + return get_lsr_info(edge_port, (unsigned int __user *) arg); + } + return -ENOIOCTLCMD; +} + + +/***************************************************************************** + * SerialBreak + * this function sends a break to the port + *****************************************************************************/ +static void edge_break(struct tty_struct *tty, int break_state) +{ + struct usb_serial_port *port = tty->driver_data; + struct edgeport_port *edge_port = usb_get_serial_port_data(port); + struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); + int status; + + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPChase) { + /* flush and chase */ + edge_port->chaseResponsePending = true; + + dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); + status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); + if (status == 0) { + /* block until chase finished */ + block_until_chase_response(edge_port); + } else { + edge_port->chaseResponsePending = false; + } + } + + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) { + if (break_state == -1) { + dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__); + status = send_iosp_ext_cmd(edge_port, + IOSP_CMD_SET_BREAK, 0); + } else { + dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__); + status = send_iosp_ext_cmd(edge_port, + IOSP_CMD_CLEAR_BREAK, 0); + } + if (status) + dev_dbg(&port->dev, "%s - error sending break set/clear command.\n", + __func__); + } +} + + +/***************************************************************************** + * process_rcvd_data + * this function handles the data received on the bulk in pipe. + *****************************************************************************/ +static void process_rcvd_data(struct edgeport_serial *edge_serial, + unsigned char *buffer, __u16 bufferLength) +{ + struct usb_serial *serial = edge_serial->serial; + struct device *dev = &serial->dev->dev; + struct usb_serial_port *port; + struct edgeport_port *edge_port; + __u16 lastBufferLength; + __u16 rxLen; + + lastBufferLength = bufferLength + 1; + + while (bufferLength > 0) { + /* failsafe incase we get a message that we don't understand */ + if (lastBufferLength == bufferLength) { + dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__); + break; + } + lastBufferLength = bufferLength; + + switch (edge_serial->rxState) { + case EXPECT_HDR1: + edge_serial->rxHeader1 = *buffer; + ++buffer; + --bufferLength; + + if (bufferLength == 0) { + edge_serial->rxState = EXPECT_HDR2; + break; + } + fallthrough; + case EXPECT_HDR2: + edge_serial->rxHeader2 = *buffer; + ++buffer; + --bufferLength; + + dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__, + edge_serial->rxHeader1, edge_serial->rxHeader2); + /* Process depending on whether this header is + * data or status */ + + if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { + /* Decode this status header and go to + * EXPECT_HDR1 (if we can process the status + * with only 2 bytes), or go to EXPECT_HDR3 to + * get the third byte. */ + edge_serial->rxPort = + IOSP_GET_HDR_PORT(edge_serial->rxHeader1); + edge_serial->rxStatusCode = + IOSP_GET_STATUS_CODE( + edge_serial->rxHeader1); + + if (!IOSP_STATUS_IS_2BYTE( + edge_serial->rxStatusCode)) { + /* This status needs additional bytes. + * Save what we have and then wait for + * more data. + */ + edge_serial->rxStatusParam + = edge_serial->rxHeader2; + edge_serial->rxState = EXPECT_HDR3; + break; + } + /* We have all the header bytes, process the + status now */ + process_rcvd_status(edge_serial, + edge_serial->rxHeader2, 0); + edge_serial->rxState = EXPECT_HDR1; + break; + } + + edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1); + edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, + edge_serial->rxHeader2); + dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__, + edge_serial->rxPort, + edge_serial->rxBytesRemaining); + + if (bufferLength == 0) { + edge_serial->rxState = EXPECT_DATA; + break; + } + fallthrough; + case EXPECT_DATA: /* Expect data */ + if (bufferLength < edge_serial->rxBytesRemaining) { + rxLen = bufferLength; + /* Expect data to start next buffer */ + edge_serial->rxState = EXPECT_DATA; + } else { + /* BufLen >= RxBytesRemaining */ + rxLen = edge_serial->rxBytesRemaining; + /* Start another header next time */ + edge_serial->rxState = EXPECT_HDR1; + } + + bufferLength -= rxLen; + edge_serial->rxBytesRemaining -= rxLen; + + /* spit this data back into the tty driver if this + port is open */ + if (rxLen && edge_serial->rxPort < serial->num_ports) { + port = serial->port[edge_serial->rxPort]; + edge_port = usb_get_serial_port_data(port); + if (edge_port && edge_port->open) { + dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", + __func__, rxLen, + edge_serial->rxPort); + edge_tty_recv(edge_port->port, buffer, + rxLen); + edge_port->port->icount.rx += rxLen; + } + } + buffer += rxLen; + break; + + case EXPECT_HDR3: /* Expect 3rd byte of status header */ + edge_serial->rxHeader3 = *buffer; + ++buffer; + --bufferLength; + + /* We have all the header bytes, process the + status now */ + process_rcvd_status(edge_serial, + edge_serial->rxStatusParam, + edge_serial->rxHeader3); + edge_serial->rxState = EXPECT_HDR1; + break; + } + } +} + + +/***************************************************************************** + * process_rcvd_status + * this function handles the any status messages received on the + * bulk in pipe. + *****************************************************************************/ +static void process_rcvd_status(struct edgeport_serial *edge_serial, + __u8 byte2, __u8 byte3) +{ + struct usb_serial_port *port; + struct edgeport_port *edge_port; + struct tty_struct *tty; + struct device *dev; + __u8 code = edge_serial->rxStatusCode; + + /* switch the port pointer to the one being currently talked about */ + if (edge_serial->rxPort >= edge_serial->serial->num_ports) + return; + port = edge_serial->serial->port[edge_serial->rxPort]; + edge_port = usb_get_serial_port_data(port); + if (edge_port == NULL) { + dev_err(&edge_serial->serial->dev->dev, + "%s - edge_port == NULL for port %d\n", + __func__, edge_serial->rxPort); + return; + } + dev = &port->dev; + + if (code == IOSP_EXT_STATUS) { + switch (byte2) { + case IOSP_EXT_STATUS_CHASE_RSP: + /* we want to do EXT status regardless of port + * open/closed */ + dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n", + __func__, edge_serial->rxPort, byte3); + /* Currently, the only EXT_STATUS is Chase, so process + * here instead of one more call to one more subroutine + * If/when more EXT_STATUS, there'll be more work to do + * Also, we currently clear flag and close the port + * regardless of content of above's Byte3. + * We could choose to do something else when Byte3 says + * Timeout on Chase from Edgeport, like wait longer in + * block_until_chase_response, but for now we don't. + */ + edge_port->chaseResponsePending = false; + wake_up(&edge_port->wait_chase); + return; + + case IOSP_EXT_STATUS_RX_CHECK_RSP: + dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", + __func__, edge_serial->rxPort, byte3); + /* Port->RxCheckRsp = true; */ + return; + } + } + + if (code == IOSP_STATUS_OPEN_RSP) { + edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); + edge_port->maxTxCredits = edge_port->txCredits; + dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n", + __func__, edge_serial->rxPort, byte2, edge_port->txCredits); + handle_new_msr(edge_port, byte2); + + /* send the current line settings to the port so we are + in sync with any further termios calls */ + tty = tty_port_tty_get(&edge_port->port->port); + if (tty) { + change_port_settings(tty, + edge_port, &tty->termios); + tty_kref_put(tty); + } + + /* we have completed the open */ + edge_port->openPending = false; + edge_port->open = true; + wake_up(&edge_port->wait_open); + return; + } + + /* If port is closed, silently discard all rcvd status. We can + * have cases where buffered status is received AFTER the close + * port command is sent to the Edgeport. + */ + if (!edge_port->open || edge_port->closePending) + return; + + switch (code) { + /* Not currently sent by Edgeport */ + case IOSP_STATUS_LSR: + dev_dbg(dev, "%s - Port %u LSR Status = %02x\n", + __func__, edge_serial->rxPort, byte2); + handle_new_lsr(edge_port, false, byte2, 0); + break; + + case IOSP_STATUS_LSR_DATA: + dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n", + __func__, edge_serial->rxPort, byte2, byte3); + /* byte2 is LSR Register */ + /* byte3 is broken data byte */ + handle_new_lsr(edge_port, true, byte2, byte3); + break; + /* + * case IOSP_EXT_4_STATUS: + * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n", + * __func__, edge_serial->rxPort, byte2, byte3); + * break; + */ + case IOSP_STATUS_MSR: + dev_dbg(dev, "%s - Port %u MSR Status = %02x\n", + __func__, edge_serial->rxPort, byte2); + /* + * Process this new modem status and generate appropriate + * events, etc, based on the new status. This routine + * also saves the MSR in Port->ShadowMsr. + */ + handle_new_msr(edge_port, byte2); + break; + + default: + dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code); + break; + } +} + + +/***************************************************************************** + * edge_tty_recv + * this function passes data on to the tty flip buffer + *****************************************************************************/ +static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, + int length) +{ + int cnt; + + cnt = tty_insert_flip_string(&port->port, data, length); + if (cnt < length) { + dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", + __func__, length - cnt); + } + data += cnt; + length -= cnt; + + tty_flip_buffer_push(&port->port); +} + + +/***************************************************************************** + * handle_new_msr + * this function handles any change to the msr register for a port. + *****************************************************************************/ +static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) +{ + struct async_icount *icount; + + if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | + EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { + icount = &edge_port->port->icount; + + /* update input line counters */ + if (newMsr & EDGEPORT_MSR_DELTA_CTS) + icount->cts++; + if (newMsr & EDGEPORT_MSR_DELTA_DSR) + icount->dsr++; + if (newMsr & EDGEPORT_MSR_DELTA_CD) + icount->dcd++; + if (newMsr & EDGEPORT_MSR_DELTA_RI) + icount->rng++; + wake_up_interruptible(&edge_port->port->port.delta_msr_wait); + } + + /* Save the new modem status */ + edge_port->shadowMSR = newMsr & 0xf0; +} + + +/***************************************************************************** + * handle_new_lsr + * this function handles any change to the lsr register for a port. + *****************************************************************************/ +static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, + __u8 lsr, __u8 data) +{ + __u8 newLsr = (__u8) (lsr & (__u8) + (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); + struct async_icount *icount; + + edge_port->shadowLSR = lsr; + + if (newLsr & LSR_BREAK) { + /* + * Parity and Framing errors only count if they + * occur exclusive of a break being + * received. + */ + newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); + } + + /* Place LSR data byte into Rx buffer */ + if (lsrData) + edge_tty_recv(edge_port->port, &data, 1); + + /* update input line counters */ + icount = &edge_port->port->icount; + if (newLsr & LSR_BREAK) + icount->brk++; + if (newLsr & LSR_OVER_ERR) + icount->overrun++; + if (newLsr & LSR_PAR_ERR) + icount->parity++; + if (newLsr & LSR_FRM_ERR) + icount->frame++; +} + + +/**************************************************************************** + * sram_write + * writes a number of bytes to the Edgeport device's sram starting at the + * given address. + * If successful returns the number of bytes written, otherwise it returns + * a negative error number of the problem. + ****************************************************************************/ +static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, + __u16 length, const __u8 *data) +{ + int result; + __u16 current_length; + unsigned char *transfer_buffer; + + dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length); + + transfer_buffer = kmalloc(64, GFP_KERNEL); + if (!transfer_buffer) + return -ENOMEM; + + /* need to split these writes up into 64 byte chunks */ + result = 0; + while (length > 0) { + if (length > 64) + current_length = 64; + else + current_length = length; + +/* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */ + memcpy(transfer_buffer, data, current_length); + result = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + USB_REQUEST_ION_WRITE_RAM, + 0x40, addr, extAddr, transfer_buffer, + current_length, 300); + if (result < 0) + break; + length -= current_length; + addr += current_length; + data += current_length; + } + + kfree(transfer_buffer); + return result; +} + + +/**************************************************************************** + * rom_write + * writes a number of bytes to the Edgeport device's ROM starting at the + * given address. + * If successful returns the number of bytes written, otherwise it returns + * a negative error number of the problem. + ****************************************************************************/ +static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, + __u16 length, const __u8 *data) +{ + int result; + __u16 current_length; + unsigned char *transfer_buffer; + + transfer_buffer = kmalloc(64, GFP_KERNEL); + if (!transfer_buffer) + return -ENOMEM; + + /* need to split these writes up into 64 byte chunks */ + result = 0; + while (length > 0) { + if (length > 64) + current_length = 64; + else + current_length = length; + memcpy(transfer_buffer, data, current_length); + result = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), + USB_REQUEST_ION_WRITE_ROM, 0x40, + addr, extAddr, + transfer_buffer, current_length, 300); + if (result < 0) + break; + length -= current_length; + addr += current_length; + data += current_length; + } + + kfree(transfer_buffer); + return result; +} + + +/**************************************************************************** + * rom_read + * reads a number of bytes from the Edgeport device starting at the given + * address. + * Returns zero on success or a negative error number. + ****************************************************************************/ +static int rom_read(struct usb_serial *serial, __u16 extAddr, + __u16 addr, __u16 length, __u8 *data) +{ + int result; + __u16 current_length; + unsigned char *transfer_buffer; + + transfer_buffer = kmalloc(64, GFP_KERNEL); + if (!transfer_buffer) + return -ENOMEM; + + /* need to split these reads up into 64 byte chunks */ + result = 0; + while (length > 0) { + if (length > 64) + current_length = 64; + else + current_length = length; + result = usb_control_msg(serial->dev, + usb_rcvctrlpipe(serial->dev, 0), + USB_REQUEST_ION_READ_ROM, + 0xC0, addr, extAddr, transfer_buffer, + current_length, 300); + if (result < current_length) { + if (result >= 0) + result = -EIO; + break; + } + memcpy(data, transfer_buffer, current_length); + length -= current_length; + addr += current_length; + data += current_length; + + result = 0; + } + + kfree(transfer_buffer); + return result; +} + + +/**************************************************************************** + * send_iosp_ext_cmd + * Is used to send a IOSP message to the Edgeport device + ****************************************************************************/ +static int send_iosp_ext_cmd(struct edgeport_port *edge_port, + __u8 command, __u8 param) +{ + unsigned char *buffer; + unsigned char *currentCommand; + int length = 0; + int status = 0; + + buffer = kmalloc(10, GFP_ATOMIC); + if (!buffer) + return -ENOMEM; + + currentCommand = buffer; + + MAKE_CMD_EXT_CMD(¤tCommand, &length, edge_port->port->port_number, + command, param); + + status = write_cmd_usb(edge_port, buffer, length); + if (status) { + /* something bad happened, let's free up the memory */ + kfree(buffer); + } + + return status; +} + + +/***************************************************************************** + * write_cmd_usb + * this function writes the given buffer out to the bulk write endpoint. + *****************************************************************************/ +static int write_cmd_usb(struct edgeport_port *edge_port, + unsigned char *buffer, int length) +{ + struct edgeport_serial *edge_serial = + usb_get_serial_data(edge_port->port->serial); + struct device *dev = &edge_port->port->dev; + int status = 0; + struct urb *urb; + + usb_serial_debug_data(dev, __func__, length, buffer); + + /* Allocate our next urb */ + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) + return -ENOMEM; + + atomic_inc(&CmdUrbs); + dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n", + __func__, urb, atomic_read(&CmdUrbs)); + + usb_fill_bulk_urb(urb, edge_serial->serial->dev, + usb_sndbulkpipe(edge_serial->serial->dev, + edge_serial->bulk_out_endpoint), + buffer, length, edge_bulk_out_cmd_callback, edge_port); + + edge_port->commandPending = true; + status = usb_submit_urb(urb, GFP_ATOMIC); + + if (status) { + /* something went wrong */ + dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n", + __func__, status); + usb_free_urb(urb); + atomic_dec(&CmdUrbs); + return status; + } + +#if 0 + wait_event(&edge_port->wait_command, !edge_port->commandPending); + + if (edge_port->commandPending) { + /* command timed out */ + dev_dbg(dev, "%s - command timed out\n", __func__); + status = -EINVAL; + } +#endif + return status; +} + + +/***************************************************************************** + * send_cmd_write_baud_rate + * this function sends the proper command to change the baud rate of the + * specified port. + *****************************************************************************/ +static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, + int baudRate) +{ + struct edgeport_serial *edge_serial = + usb_get_serial_data(edge_port->port->serial); + struct device *dev = &edge_port->port->dev; + unsigned char *cmdBuffer; + unsigned char *currCmd; + int cmdLen = 0; + int divisor; + int status; + u32 number = edge_port->port->port_number; + + if (edge_serial->is_epic && + !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { + dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n", + baudRate); + return 0; + } + + dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate); + + status = calc_baud_rate_divisor(dev, baudRate, &divisor); + if (status) { + dev_err(dev, "%s - bad baud rate\n", __func__); + return status; + } + + /* Alloc memory for the string of commands. */ + cmdBuffer = kmalloc(0x100, GFP_ATOMIC); + if (!cmdBuffer) + return -ENOMEM; + + currCmd = cmdBuffer; + + /* Enable access to divisor latch */ + MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); + + /* Write the divisor itself */ + MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); + MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); + + /* Restore original value to disable access to divisor latch */ + MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, + edge_port->shadowLCR); + + status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); + if (status) { + /* something bad happened, let's free up the memory */ + kfree(cmdBuffer); + } + + return status; +} + + +/***************************************************************************** + * calc_baud_rate_divisor + * this function calculates the proper baud rate divisor for the specified + * baud rate. + *****************************************************************************/ +static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor) +{ + int i; + __u16 custom; + + for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { + if (divisor_table[i].BaudRate == baudrate) { + *divisor = divisor_table[i].Divisor; + return 0; + } + } + + /* We have tried all of the standard baud rates + * lets try to calculate the divisor for this baud rate + * Make sure the baud rate is reasonable */ + if (baudrate > 50 && baudrate < 230400) { + /* get divisor */ + custom = (__u16)((230400L + baudrate/2) / baudrate); + + *divisor = custom; + + dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom); + return 0; + } + + return -1; +} + + +/***************************************************************************** + * send_cmd_write_uart_register + * this function builds up a uart register message and sends to the device. + *****************************************************************************/ +static int send_cmd_write_uart_register(struct edgeport_port *edge_port, + __u8 regNum, __u8 regValue) +{ + struct edgeport_serial *edge_serial = + usb_get_serial_data(edge_port->port->serial); + struct device *dev = &edge_port->port->dev; + unsigned char *cmdBuffer; + unsigned char *currCmd; + unsigned long cmdLen = 0; + int status; + + dev_dbg(dev, "%s - write to %s register 0x%02x\n", + (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); + + if (edge_serial->is_epic && + !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && + regNum == MCR) { + dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n"); + return 0; + } + + if (edge_serial->is_epic && + !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && + regNum == LCR) { + dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n"); + return 0; + } + + /* Alloc memory for the string of commands. */ + cmdBuffer = kmalloc(0x10, GFP_ATOMIC); + if (cmdBuffer == NULL) + return -ENOMEM; + + currCmd = cmdBuffer; + + /* Build a cmd in the buffer to write the given register */ + MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number, + regNum, regValue); + + status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); + if (status) { + /* something bad happened, let's free up the memory */ + kfree(cmdBuffer); + } + + return status; +} + + +/***************************************************************************** + * change_port_settings + * This routine is called to set the UART on the device to match the + * specified new settings. + *****************************************************************************/ + +static void change_port_settings(struct tty_struct *tty, + struct edgeport_port *edge_port, struct ktermios *old_termios) +{ + struct device *dev = &edge_port->port->dev; + struct edgeport_serial *edge_serial = + usb_get_serial_data(edge_port->port->serial); + int baud; + unsigned cflag; + __u8 mask = 0xff; + __u8 lData; + __u8 lParity; + __u8 lStop; + __u8 rxFlow; + __u8 txFlow; + int status; + + if (!edge_port->open && + !edge_port->openPending) { + dev_dbg(dev, "%s - port not opened\n", __func__); + return; + } + + cflag = tty->termios.c_cflag; + + switch (cflag & CSIZE) { + case CS5: + lData = LCR_BITS_5; mask = 0x1f; + dev_dbg(dev, "%s - data bits = 5\n", __func__); + break; + case CS6: + lData = LCR_BITS_6; mask = 0x3f; + dev_dbg(dev, "%s - data bits = 6\n", __func__); + break; + case CS7: + lData = LCR_BITS_7; mask = 0x7f; + dev_dbg(dev, "%s - data bits = 7\n", __func__); + break; + default: + case CS8: + lData = LCR_BITS_8; + dev_dbg(dev, "%s - data bits = 8\n", __func__); + break; + } + + lParity = LCR_PAR_NONE; + if (cflag & PARENB) { + if (cflag & CMSPAR) { + if (cflag & PARODD) { + lParity = LCR_PAR_MARK; + dev_dbg(dev, "%s - parity = mark\n", __func__); + } else { + lParity = LCR_PAR_SPACE; + dev_dbg(dev, "%s - parity = space\n", __func__); + } + } else if (cflag & PARODD) { + lParity = LCR_PAR_ODD; + dev_dbg(dev, "%s - parity = odd\n", __func__); + } else { + lParity = LCR_PAR_EVEN; + dev_dbg(dev, "%s - parity = even\n", __func__); + } + } else { + dev_dbg(dev, "%s - parity = none\n", __func__); + } + + if (cflag & CSTOPB) { + lStop = LCR_STOP_2; + dev_dbg(dev, "%s - stop bits = 2\n", __func__); + } else { + lStop = LCR_STOP_1; + dev_dbg(dev, "%s - stop bits = 1\n", __func__); + } + + /* figure out the flow control settings */ + rxFlow = txFlow = 0x00; + if (cflag & CRTSCTS) { + rxFlow |= IOSP_RX_FLOW_RTS; + txFlow |= IOSP_TX_FLOW_CTS; + dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); + } else { + dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); + } + + /* if we are implementing XON/XOFF, set the start and stop character + in the device */ + if (I_IXOFF(tty) || I_IXON(tty)) { + unsigned char stop_char = STOP_CHAR(tty); + unsigned char start_char = START_CHAR(tty); + + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPSetXChar) { + send_iosp_ext_cmd(edge_port, + IOSP_CMD_SET_XON_CHAR, start_char); + send_iosp_ext_cmd(edge_port, + IOSP_CMD_SET_XOFF_CHAR, stop_char); + } + + /* if we are implementing INBOUND XON/XOFF */ + if (I_IXOFF(tty)) { + rxFlow |= IOSP_RX_FLOW_XON_XOFF; + dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", + __func__, start_char, stop_char); + } else { + dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); + } + + /* if we are implementing OUTBOUND XON/XOFF */ + if (I_IXON(tty)) { + txFlow |= IOSP_TX_FLOW_XON_XOFF; + dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", + __func__, start_char, stop_char); + } else { + dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); + } + } + + /* Set flow control to the configured value */ + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPSetRxFlow) + send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); + if (!edge_serial->is_epic || + edge_serial->epic_descriptor.Supports.IOSPSetTxFlow) + send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); + + + edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); + edge_port->shadowLCR |= (lData | lParity | lStop); + + edge_port->validDataMask = mask; + + /* Send the updated LCR value to the EdgePort */ + status = send_cmd_write_uart_register(edge_port, LCR, + edge_port->shadowLCR); + if (status != 0) + return; + + /* set up the MCR register and send it to the EdgePort */ + edge_port->shadowMCR = MCR_MASTER_IE; + if (cflag & CBAUD) + edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); + + status = send_cmd_write_uart_register(edge_port, MCR, + edge_port->shadowMCR); + if (status != 0) + return; + + /* Determine divisor based on baud rate */ + baud = tty_get_baud_rate(tty); + if (!baud) { + /* pick a default, any default... */ + baud = 9600; + } + + dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); + status = send_cmd_write_baud_rate(edge_port, baud); + if (status == -1) { + /* Speed change was not possible - put back the old speed */ + baud = tty_termios_baud_rate(old_termios); + tty_encode_baud_rate(tty, baud, baud); + } +} + + +/**************************************************************************** + * unicode_to_ascii + * Turns a string from Unicode into ASCII. + * Doesn't do a good job with any characters that are outside the normal + * ASCII range, but it's only for debugging... + * NOTE: expects the unicode in LE format + ****************************************************************************/ +static void unicode_to_ascii(char *string, int buflen, + __le16 *unicode, int unicode_size) +{ + int i; + + if (buflen <= 0) /* never happens, but... */ + return; + --buflen; /* space for nul */ + + for (i = 0; i < unicode_size; i++) { + if (i >= buflen) + break; + string[i] = (char)(le16_to_cpu(unicode[i])); + } + string[i] = 0x00; +} + + +/**************************************************************************** + * get_manufacturing_desc + * reads in the manufacturing descriptor and stores it into the serial + * structure. + ****************************************************************************/ +static void get_manufacturing_desc(struct edgeport_serial *edge_serial) +{ + struct device *dev = &edge_serial->serial->dev->dev; + int response; + + dev_dbg(dev, "getting manufacturer descriptor\n"); + + response = rom_read(edge_serial->serial, + (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, + (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), + EDGE_MANUF_DESC_LEN, + (__u8 *)(&edge_serial->manuf_descriptor)); + + if (response < 0) { + dev_err(dev, "error in getting manufacturer descriptor: %d\n", + response); + } else { + char string[30]; + dev_dbg(dev, "**Manufacturer Descriptor\n"); + dev_dbg(dev, " RomSize: %dK\n", + edge_serial->manuf_descriptor.RomSize); + dev_dbg(dev, " RamSize: %dK\n", + edge_serial->manuf_descriptor.RamSize); + dev_dbg(dev, " CpuRev: %d\n", + edge_serial->manuf_descriptor.CpuRev); + dev_dbg(dev, " BoardRev: %d\n", + edge_serial->manuf_descriptor.BoardRev); + dev_dbg(dev, " NumPorts: %d\n", + edge_serial->manuf_descriptor.NumPorts); + dev_dbg(dev, " DescDate: %d/%d/%d\n", + edge_serial->manuf_descriptor.DescDate[0], + edge_serial->manuf_descriptor.DescDate[1], + edge_serial->manuf_descriptor.DescDate[2]+1900); + unicode_to_ascii(string, sizeof(string), + edge_serial->manuf_descriptor.SerialNumber, + edge_serial->manuf_descriptor.SerNumLength/2); + dev_dbg(dev, " SerialNumber: %s\n", string); + unicode_to_ascii(string, sizeof(string), + edge_serial->manuf_descriptor.AssemblyNumber, + edge_serial->manuf_descriptor.AssemblyNumLength/2); + dev_dbg(dev, " AssemblyNumber: %s\n", string); + unicode_to_ascii(string, sizeof(string), + edge_serial->manuf_descriptor.OemAssyNumber, + edge_serial->manuf_descriptor.OemAssyNumLength/2); + dev_dbg(dev, " OemAssyNumber: %s\n", string); + dev_dbg(dev, " UartType: %d\n", + edge_serial->manuf_descriptor.UartType); + dev_dbg(dev, " IonPid: %d\n", + edge_serial->manuf_descriptor.IonPid); + dev_dbg(dev, " IonConfig: %d\n", + edge_serial->manuf_descriptor.IonConfig); + } +} + + +/**************************************************************************** + * get_boot_desc + * reads in the bootloader descriptor and stores it into the serial + * structure. + ****************************************************************************/ +static void get_boot_desc(struct edgeport_serial *edge_serial) +{ + struct device *dev = &edge_serial->serial->dev->dev; + int response; + + dev_dbg(dev, "getting boot descriptor\n"); + + response = rom_read(edge_serial->serial, + (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, + (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), + EDGE_BOOT_DESC_LEN, + (__u8 *)(&edge_serial->boot_descriptor)); + + if (response < 0) { + dev_err(dev, "error in getting boot descriptor: %d\n", + response); + } else { + dev_dbg(dev, "**Boot Descriptor:\n"); + dev_dbg(dev, " BootCodeLength: %d\n", + le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); + dev_dbg(dev, " MajorVersion: %d\n", + edge_serial->boot_descriptor.MajorVersion); + dev_dbg(dev, " MinorVersion: %d\n", + edge_serial->boot_descriptor.MinorVersion); + dev_dbg(dev, " BuildNumber: %d\n", + le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); + dev_dbg(dev, " Capabilities: 0x%x\n", + le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); + dev_dbg(dev, " UConfig0: %d\n", + edge_serial->boot_descriptor.UConfig0); + dev_dbg(dev, " UConfig1: %d\n", + edge_serial->boot_descriptor.UConfig1); + } +} + + +/**************************************************************************** + * load_application_firmware + * This is called to load the application firmware to the device + ****************************************************************************/ +static void load_application_firmware(struct edgeport_serial *edge_serial) +{ + struct device *dev = &edge_serial->serial->dev->dev; + const struct ihex_binrec *rec; + const struct firmware *fw; + const char *fw_name; + const char *fw_info; + int response; + __u32 Operaddr; + __u16 build; + + switch (edge_serial->product_info.iDownloadFile) { + case EDGE_DOWNLOAD_FILE_I930: + fw_info = "downloading firmware version (930)"; + fw_name = "edgeport/down.fw"; + break; + + case EDGE_DOWNLOAD_FILE_80251: + fw_info = "downloading firmware version (80251)"; + fw_name = "edgeport/down2.fw"; + break; + + case EDGE_DOWNLOAD_FILE_NONE: + dev_dbg(dev, "No download file specified, skipping download\n"); + return; + + default: + return; + } + + response = request_ihex_firmware(&fw, fw_name, + &edge_serial->serial->dev->dev); + if (response) { + dev_err(dev, "Failed to load image \"%s\" err %d\n", + fw_name, response); + return; + } + + rec = (const struct ihex_binrec *)fw->data; + build = (rec->data[2] << 8) | rec->data[3]; + + dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build); + + edge_serial->product_info.FirmwareMajorVersion = rec->data[0]; + edge_serial->product_info.FirmwareMinorVersion = rec->data[1]; + edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); + + for (rec = ihex_next_binrec(rec); rec; + rec = ihex_next_binrec(rec)) { + Operaddr = be32_to_cpu(rec->addr); + response = sram_write(edge_serial->serial, + Operaddr >> 16, + Operaddr & 0xFFFF, + be16_to_cpu(rec->len), + &rec->data[0]); + if (response < 0) { + dev_err(&edge_serial->serial->dev->dev, + "sram_write failed (%x, %x, %d)\n", + Operaddr >> 16, Operaddr & 0xFFFF, + be16_to_cpu(rec->len)); + break; + } + } + + dev_dbg(dev, "sending exec_dl_code\n"); + response = usb_control_msg (edge_serial->serial->dev, + usb_sndctrlpipe(edge_serial->serial->dev, 0), + USB_REQUEST_ION_EXEC_DL_CODE, + 0x40, 0x4000, 0x0001, NULL, 0, 3000); + + release_firmware(fw); +} + + +/**************************************************************************** + * edge_startup + ****************************************************************************/ +static int edge_startup(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial; + struct usb_device *dev; + struct device *ddev = &serial->dev->dev; + int i; + int response; + bool interrupt_in_found; + bool bulk_in_found; + bool bulk_out_found; + static const __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, + EDGE_COMPATIBILITY_MASK1, + EDGE_COMPATIBILITY_MASK2 }; + + dev = serial->dev; + + /* create our private serial structure */ + edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); + if (!edge_serial) + return -ENOMEM; + + spin_lock_init(&edge_serial->es_lock); + edge_serial->serial = serial; + usb_set_serial_data(serial, edge_serial); + + /* get the name for the device from the device */ + i = usb_string(dev, dev->descriptor.iManufacturer, + &edge_serial->name[0], MAX_NAME_LEN+1); + if (i < 0) + i = 0; + edge_serial->name[i++] = ' '; + usb_string(dev, dev->descriptor.iProduct, + &edge_serial->name[i], MAX_NAME_LEN+2 - i); + + dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); + + /* Read the epic descriptor */ + if (get_epic_descriptor(edge_serial) < 0) { + /* memcpy descriptor to Supports structures */ + memcpy(&edge_serial->epic_descriptor.Supports, descriptor, + sizeof(struct edge_compatibility_bits)); + + /* get the manufacturing descriptor for this device */ + get_manufacturing_desc(edge_serial); + + /* get the boot descriptor */ + get_boot_desc(edge_serial); + + get_product_info(edge_serial); + } + + /* set the number of ports from the manufacturing description */ + /* serial->num_ports = serial->product_info.NumPorts; */ + if ((!edge_serial->is_epic) && + (edge_serial->product_info.NumPorts != serial->num_ports)) { + dev_warn(ddev, + "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n", + edge_serial->product_info.NumPorts, + serial->num_ports); + } + + dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies); + + /* If not an EPiC device */ + if (!edge_serial->is_epic) { + /* now load the application firmware into this device */ + load_application_firmware(edge_serial); + + dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies); + + /* Check current Edgeport EEPROM and update if necessary */ + update_edgeport_E2PROM(edge_serial); + + dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies); + + /* set the configuration to use #1 */ +/* dev_dbg(ddev, "set_configuration 1\n"); */ +/* usb_set_configuration (dev, 1); */ + } + dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n", + edge_serial->product_info.FirmwareMajorVersion, + edge_serial->product_info.FirmwareMinorVersion, + le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); + + /* we set up the pointers to the endpoints in the edge_open function, + * as the structures aren't created yet. */ + + response = 0; + + if (edge_serial->is_epic) { + struct usb_host_interface *alt; + + alt = serial->interface->cur_altsetting; + + /* EPIC thing, set up our interrupt polling now and our read + * urb, so that the device knows it really is connected. */ + interrupt_in_found = bulk_in_found = bulk_out_found = false; + for (i = 0; i < alt->desc.bNumEndpoints; ++i) { + struct usb_endpoint_descriptor *endpoint; + int buffer_size; + + endpoint = &alt->endpoint[i].desc; + buffer_size = usb_endpoint_maxp(endpoint); + if (!interrupt_in_found && + (usb_endpoint_is_int_in(endpoint))) { + /* we found a interrupt in endpoint */ + dev_dbg(ddev, "found interrupt in\n"); + + /* not set up yet, so do it now */ + edge_serial->interrupt_read_urb = + usb_alloc_urb(0, GFP_KERNEL); + if (!edge_serial->interrupt_read_urb) { + response = -ENOMEM; + break; + } + + edge_serial->interrupt_in_buffer = + kmalloc(buffer_size, GFP_KERNEL); + if (!edge_serial->interrupt_in_buffer) { + response = -ENOMEM; + break; + } + edge_serial->interrupt_in_endpoint = + endpoint->bEndpointAddress; + + /* set up our interrupt urb */ + usb_fill_int_urb( + edge_serial->interrupt_read_urb, + dev, + usb_rcvintpipe(dev, + endpoint->bEndpointAddress), + edge_serial->interrupt_in_buffer, + buffer_size, + edge_interrupt_callback, + edge_serial, + endpoint->bInterval); + + interrupt_in_found = true; + } + + if (!bulk_in_found && + (usb_endpoint_is_bulk_in(endpoint))) { + /* we found a bulk in endpoint */ + dev_dbg(ddev, "found bulk in\n"); + + /* not set up yet, so do it now */ + edge_serial->read_urb = + usb_alloc_urb(0, GFP_KERNEL); + if (!edge_serial->read_urb) { + response = -ENOMEM; + break; + } + + edge_serial->bulk_in_buffer = + kmalloc(buffer_size, GFP_KERNEL); + if (!edge_serial->bulk_in_buffer) { + response = -ENOMEM; + break; + } + edge_serial->bulk_in_endpoint = + endpoint->bEndpointAddress; + + /* set up our bulk in urb */ + usb_fill_bulk_urb(edge_serial->read_urb, dev, + usb_rcvbulkpipe(dev, + endpoint->bEndpointAddress), + edge_serial->bulk_in_buffer, + usb_endpoint_maxp(endpoint), + edge_bulk_in_callback, + edge_serial); + bulk_in_found = true; + } + + if (!bulk_out_found && + (usb_endpoint_is_bulk_out(endpoint))) { + /* we found a bulk out endpoint */ + dev_dbg(ddev, "found bulk out\n"); + edge_serial->bulk_out_endpoint = + endpoint->bEndpointAddress; + bulk_out_found = true; + } + } + + if (response || !interrupt_in_found || !bulk_in_found || + !bulk_out_found) { + if (!response) { + dev_err(ddev, "expected endpoints not found\n"); + response = -ENODEV; + } + + goto error; + } + + /* start interrupt read for this edgeport this interrupt will + * continue as long as the edgeport is connected */ + response = usb_submit_urb(edge_serial->interrupt_read_urb, + GFP_KERNEL); + if (response) { + dev_err(ddev, "%s - Error %d submitting control urb\n", + __func__, response); + + goto error; + } + } + return response; + +error: + usb_free_urb(edge_serial->interrupt_read_urb); + kfree(edge_serial->interrupt_in_buffer); + + usb_free_urb(edge_serial->read_urb); + kfree(edge_serial->bulk_in_buffer); + + kfree(edge_serial); + + return response; +} + + +/**************************************************************************** + * edge_disconnect + * This function is called whenever the device is removed from the usb bus. + ****************************************************************************/ +static void edge_disconnect(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial = usb_get_serial_data(serial); + + if (edge_serial->is_epic) { + usb_kill_urb(edge_serial->interrupt_read_urb); + usb_kill_urb(edge_serial->read_urb); + } +} + + +/**************************************************************************** + * edge_release + * This function is called when the device structure is deallocated. + ****************************************************************************/ +static void edge_release(struct usb_serial *serial) +{ + struct edgeport_serial *edge_serial = usb_get_serial_data(serial); + + if (edge_serial->is_epic) { + usb_kill_urb(edge_serial->interrupt_read_urb); + usb_free_urb(edge_serial->interrupt_read_urb); + kfree(edge_serial->interrupt_in_buffer); + + usb_kill_urb(edge_serial->read_urb); + usb_free_urb(edge_serial->read_urb); + kfree(edge_serial->bulk_in_buffer); + } + + kfree(edge_serial); +} + +static int edge_port_probe(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + + edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); + if (!edge_port) + return -ENOMEM; + + spin_lock_init(&edge_port->ep_lock); + edge_port->port = port; + + usb_set_serial_port_data(port, edge_port); + + return 0; +} + +static int edge_port_remove(struct usb_serial_port *port) +{ + struct edgeport_port *edge_port; + + edge_port = usb_get_serial_port_data(port); + kfree(edge_port); + + return 0; +} + +static struct usb_serial_driver edgeport_2port_device = { + .driver = { + .owner = THIS_MODULE, + .name = "edgeport_2", + }, + .description = "Edgeport 2 port adapter", + .id_table = edgeport_2port_id_table, + .num_ports = 2, + .num_bulk_in = 1, + .num_bulk_out = 1, + .num_interrupt_in = 1, + .open = edge_open, + .close = edge_close, + .throttle = edge_throttle, + .unthrottle = edge_unthrottle, + .attach = edge_startup, + .disconnect = edge_disconnect, + .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, + .ioctl = edge_ioctl, + .set_termios = edge_set_termios, + .tiocmget = edge_tiocmget, + .tiocmset = edge_tiocmset, + .get_serial = get_serial_info, + .tiocmiwait = usb_serial_generic_tiocmiwait, + .get_icount = usb_serial_generic_get_icount, + .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_data_callback, +}; + +static struct usb_serial_driver edgeport_4port_device = { + .driver = { + .owner = THIS_MODULE, + .name = "edgeport_4", + }, + .description = "Edgeport 4 port adapter", + .id_table = edgeport_4port_id_table, + .num_ports = 4, + .num_bulk_in = 1, + .num_bulk_out = 1, + .num_interrupt_in = 1, + .open = edge_open, + .close = edge_close, + .throttle = edge_throttle, + .unthrottle = edge_unthrottle, + .attach = edge_startup, + .disconnect = edge_disconnect, + .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, + .ioctl = edge_ioctl, + .set_termios = edge_set_termios, + .tiocmget = edge_tiocmget, + .tiocmset = edge_tiocmset, + .get_serial = get_serial_info, + .tiocmiwait = usb_serial_generic_tiocmiwait, + .get_icount = usb_serial_generic_get_icount, + .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_data_callback, +}; + +static struct usb_serial_driver edgeport_8port_device = { + .driver = { + .owner = THIS_MODULE, + .name = "edgeport_8", + }, + .description = "Edgeport 8 port adapter", + .id_table = edgeport_8port_id_table, + .num_ports = 8, + .num_bulk_in = 1, + .num_bulk_out = 1, + .num_interrupt_in = 1, + .open = edge_open, + .close = edge_close, + .throttle = edge_throttle, + .unthrottle = edge_unthrottle, + .attach = edge_startup, + .disconnect = edge_disconnect, + .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, + .ioctl = edge_ioctl, + .set_termios = edge_set_termios, + .tiocmget = edge_tiocmget, + .tiocmset = edge_tiocmset, + .get_serial = get_serial_info, + .tiocmiwait = usb_serial_generic_tiocmiwait, + .get_icount = usb_serial_generic_get_icount, + .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_data_callback, +}; + +static struct usb_serial_driver epic_device = { + .driver = { + .owner = THIS_MODULE, + .name = "epic", + }, + .description = "EPiC device", + .id_table = Epic_port_id_table, + .num_ports = 1, + .num_bulk_in = 1, + .num_bulk_out = 1, + .num_interrupt_in = 1, + .open = edge_open, + .close = edge_close, + .throttle = edge_throttle, + .unthrottle = edge_unthrottle, + .attach = edge_startup, + .disconnect = edge_disconnect, + .release = edge_release, + .port_probe = edge_port_probe, + .port_remove = edge_port_remove, + .ioctl = edge_ioctl, + .set_termios = edge_set_termios, + .tiocmget = edge_tiocmget, + .tiocmset = edge_tiocmset, + .get_serial = get_serial_info, + .tiocmiwait = usb_serial_generic_tiocmiwait, + .get_icount = usb_serial_generic_get_icount, + .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_data_callback, +}; + +static struct usb_serial_driver * const serial_drivers[] = { + &edgeport_2port_device, &edgeport_4port_device, + &edgeport_8port_device, &epic_device, NULL +}; + +module_usb_serial_driver(serial_drivers, id_table_combined); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_FIRMWARE("edgeport/boot.fw"); +MODULE_FIRMWARE("edgeport/boot2.fw"); +MODULE_FIRMWARE("edgeport/down.fw"); +MODULE_FIRMWARE("edgeport/down2.fw"); |