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path: root/drivers/usb/serial/io_edgeport.c
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Diffstat (limited to 'drivers/usb/serial/io_edgeport.c')
-rw-r--r--drivers/usb/serial/io_edgeport.c3130
1 files changed, 3130 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..3a4c0febf
--- /dev/null
+++ b/drivers/usb/serial/io_edgeport.c
@@ -0,0 +1,3130 @@
+// 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 parameter */
+ __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);
+
+
+/* function prototypes */
+
+static void edge_close(struct usb_serial_port *port);
+
+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 void change_port_settings(struct tty_struct *tty,
+ struct edgeport_port *edge_port,
+ const 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 rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
+ __u16 length, const __u8 *data);
+
+/* ************************************************************************ */
+/* ************************************************************************ */
+/* ************************************************************************ */
+/* ************************************************************************ */
+
+/************************************************************************
+ * *
+ * 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);
+}
+
+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 timeout\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.
+ *****************************************************************************/
+static unsigned 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);
+ unsigned int room;
+ unsigned long flags;
+
+ /* 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 %u\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)
+ *****************************************************************************/
+static unsigned 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);
+ unsigned int num_chars;
+ unsigned long flags;
+
+ 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 %u\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,
+ const 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;
+}
+
+/*****************************************************************************
+ * 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(&currentCommand, &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, const 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 void edge_port_remove(struct usb_serial_port *port)
+{
+ struct edgeport_port *edge_port;
+
+ edge_port = usb_get_serial_port_data(port);
+ kfree(edge_port);
+}
+
+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,
+ .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,
+ .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,
+ .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,
+ .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");