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    SubjectRe: nozomi version 2.1c for review
    Date
    On Freitag 09 November 2007 15:25:00, you (Alan Cox) wrote:
    > > + switch (port) {
    > > + case PORT_MDM:
    > > + dc->last_ier = (dc->last_ier & ~MDM_UL) | MDM_UL;
    > > + break;
    >
    > The & ~xxx is unneeded if you then set it again always
    >
    > Could also clean up to be
    >
    > u8 mask[NR_PORTS] = { DIAG_UGL, APP1_UL, ... }
    > dc->last_ier |= mask[port];
    >
    > instead of the switch - ditto disable transmit_ul etc

    Thank you very much for your feedback. This is exactly what i
    hoped for.

    This now incorporates your suggestions (even though IMHO the mask arrays
    should be of type u16 - at least I think so), I reviewed the output of
    sparse from nozomi.c and removed cause for a warning, and rebased the
    patch on latest version of Gregs git repository (now for 2.6.24-rc2).

    I really appreciated any feedback or hint were to dig further or what
    should be done and fixed.

    Thanks,
    Frank
    ---
    From foo@baz Tue Apr 9 12:12:43 2002
    Date: Thu, 24 Aug 2006 01:25:46 -0700
    To: Greg KH <greg@kroah.com>
    From: Greg Kroah-Hartman <gregkh@suse.de>
    Subject: Add nozomi driver to the tree

    This is a driver to control the cardbus wireless data card that works on
    3g networks.

    It still needs a lot of cleanup, but is getting there...
    at least it builds with no warnings on i386 now...

    Thanks to Arnaud Patard <apatard@mandriva.com> for help with bugfixing.
    Thanks to Alan Cox for a lot of tty fixes.
    Thanks to Satyam Sharma <satyam@infradead.org> for fixing buildbreakage.
    Thanks to Frank Seidel <fseidel@suse.de> for a lot of bugfixes and
    rewriting to make it a sane Linux driver

    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    Signed-off-by: Frank Seidel <fseidel@suse.de>

    ---
    drivers/char/Kconfig | 10
    drivers/char/Makefile | 1
    drivers/char/nozomi.c | 2230 ++++++++++++++++++++++++++++++++++++++++++++++++++
    3 files changed, 2241 insertions(+)

    Index: linux-2.6.24-rc2/drivers/char/Kconfig
    ===================================================================
    --- linux-2.6.24-rc2.orig/drivers/char/Kconfig
    +++ linux-2.6.24-rc2/drivers/char/Kconfig
    @@ -373,6 +373,16 @@ config ISTALLION
    To compile this driver as a module, choose M here: the
    module will be called istallion.

    +config NOZOMI
    + tristate "HSDPA Broadband Wireless Data Card - Globe Trotter"
    + depends on PCI && EXPERIMENTAL
    + help
    + If you have a HSDPA driver Broadband Wireless Data Card -
    + Globe Trotter PCMCIA card, say Y here.
    +
    + To compile this driver as a module, choose M here, the module
    + will be called nozomi.
    +
    config A2232
    tristate "Commodore A2232 serial support (EXPERIMENTAL)"
    depends on EXPERIMENTAL && ZORRO && BROKEN_ON_SMP
    Index: linux-2.6.24-rc2/drivers/char/Makefile
    ===================================================================
    --- linux-2.6.24-rc2.orig/drivers/char/Makefile
    +++ linux-2.6.24-rc2/drivers/char/Makefile
    @@ -26,6 +26,7 @@ obj-$(CONFIG_SERIAL167) += serial167.o
    obj-$(CONFIG_CYCLADES) += cyclades.o
    obj-$(CONFIG_STALLION) += stallion.o
    obj-$(CONFIG_ISTALLION) += istallion.o
    +obj-$(CONFIG_NOZOMI) += nozomi.o
    obj-$(CONFIG_DIGIEPCA) += epca.o
    obj-$(CONFIG_SPECIALIX) += specialix.o
    obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
    Index: linux-2.6.24-rc2/drivers/char/nozomi.c
    ===================================================================
    --- /dev/null
    +++ linux-2.6.24-rc2/drivers/char/nozomi.c
    @@ -0,0 +1,2221 @@
    +/*
    + * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
    + *
    + * Written by: Ulf Jakobsson,
    + * Jan �erfeldt,
    + * Stefan Thomasson,
    + *
    + * Maintained by: Paul Hardwick (p.hardwick@option.com)
    + *
    + * Patches:
    + * Locking code changes for Vodafone by Sphere Systems Ltd,
    + * Andrew Bird (ajb@spheresystems.co.uk )
    + * & Phil Sanderson
    + *
    + * Source has been ported from an implementation made by Filip Aben @ Option
    + *
    + * --------------------------------------------------------------------------
    + *
    + * Copyright (c) 2005,2006 Option Wireless Sweden AB
    + * Copyright (c) 2006 Sphere Systems Ltd
    + * Copyright (c) 2006 Option Wireless n/v
    + * All rights Reserved.
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License as published by
    + * the Free Software Foundation; either version 2 of the License, or
    + * (at your option) any later version.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
    + *
    + * --------------------------------------------------------------------------
    + */
    +
    +/*
    + * CHANGELOG
    + * Version 2.1c
    + * 30-October-2007 Frank Seidel
    + * - Completed multicard support
    + * - Minor cleanups
    + *
    + * Version 2.1b
    + * 07-August-2007 Frank Seidel
    + * - Minor cleanups
    + * - theoretical multicard support
    + *
    + * Version 2.1
    + * 03-July-2006 Paul Hardwick
    + *
    + * - Stability Improvements. Incorporated spinlock wraps patch.
    + * - Updated for newer 2.6.14+ kernels (tty_buffer_request_room)
    + * - using __devexit macro for tty
    + *
    + *
    + * Version 2.0
    + * 08-feb-2006 15:34:10:Ulf
    + *
    + * -Fixed issue when not waking up line disipine layer, could probably result
    + * in better uplink performance for 2.4.
    + *
    + * -Fixed issue with big endian during initalization, now proper toggle flags
    + * are handled between preloader and maincode.
    + *
    + * -Fixed flow control issue.
    + *
    + * -Added support for setting DTR.
    + *
    + * -For 2.4 kernels, removing temporary buffer that's not needed.
    + *
    + * -Reading CTS only for modem port (only port that supports it).
    + *
    + * -Return 0 in write_room instead of netative value, it's not handled in
    + * upper layer.
    + *
    + * --------------------------------------------------------------------------
    + * Version 1.0
    + *
    + * First version of driver, only tested with card of type F32_2.
    + * Works fine with 2.4 and 2.6 kernels.
    + * Driver also support big endian architecture.
    + */
    +
    +/* Enable this to have a lot of debug printouts */
    +#define DEBUG
    +
    +#include <linux/kernel.h>
    +#include <linux/module.h>
    +#include <linux/pci.h>
    +#include <linux/ioport.h>
    +#include <linux/tty.h>
    +#include <linux/tty_driver.h>
    +#include <linux/tty_flip.h>
    +#include <linux/serial.h>
    +#include <linux/interrupt.h>
    +#include <linux/kmod.h>
    +#include <linux/init.h>
    +#include <linux/kfifo.h>
    +#include <linux/list.h>
    +#include <linux/uaccess.h>
    +#include <asm/atomic.h>
    +
    +#include <linux/delay.h>
    +
    +
    +#define VERSION_STRING DRIVER_DESC " 2.1c (build date: " \
    + __DATE__ " " __TIME__ ")"
    +
    +/* Macros definitions */
    +
    +/* Default debug printout level */
    +#define NOZOMI_DEBUG_LEVEL 0x00
    +
    +#define P_BUF_SIZE 128
    +#define NFO(_err_flag_, args...) \
    +do { \
    + char tmp[P_BUF_SIZE]; \
    + snprintf(tmp, sizeof(tmp), ##args); \
    + printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
    + __FUNCTION__, tmp); \
    +} while (0)
    +
    +#define DBG1(args...) D_(0x01, ##args)
    +#define DBG2(args...) D_(0x02, ##args)
    +#define DBG3(args...) D_(0x04, ##args)
    +#define DBG4(args...) D_(0x08, ##args)
    +#define DBG5(args...) D_(0x10, ##args)
    +#define DBG6(args...) D_(0x20, ##args)
    +#define DBG7(args...) D_(0x40, ##args)
    +#define DBG8(args...) D_(0x80, ##args)
    +
    +#ifdef DEBUG
    +/* Do we need this settable at runtime? */
    +static int debug = NOZOMI_DEBUG_LEVEL;
    +
    +#define D(lvl, args...) do {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
    + while (0)
    +#define D_(lvl, args...) D(lvl, ##args)
    +
    +/* These printouts are always printed */
    +
    +#else
    +static int debug;
    +#define D_(lvl, args...)
    +#endif
    +
    +/* TODO: rewrite to optimize macros... */
    +
    +#define TMP_BUF_MAX 256
    +
    +#define DUMP(buf__,len__) \
    + do { \
    + char tbuf[TMP_BUF_MAX] = {0};\
    + if (len__ > 1) {\
    + snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
    + if (tbuf[len__-2] == '\r') {\
    + tbuf[len__-2] = 'r';\
    + } \
    + DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
    + } else {\
    + DBG1("SENDING: '%s' (%d)", tbuf, len__);\
    + } \
    +} while (0)
    +
    +/* Defines */
    +#define NOZOMI_NAME "nozomi"
    +#define NOZOMI_NAME_TTY "nozomi_tty"
    +#define DRIVER_DESC "Nozomi driver"
    +
    +#define NTTY_TTY_MAJOR 241
    +#define NTTY_TTY_MINORS MAX_PORT
    +#define NTTY_TTY_MAXMINORS 256
    +#define NTTY_FIFO_BUFFER_SIZE 8192
    +
    +/* Must be power of 2 */
    +#define FIFO_BUFFER_SIZE_UL 8192
    +
    +/* Size of tmp send buffer to card */
    +#define SEND_BUF_MAX 1024
    +#define RECEIVE_BUF_MAX 4
    +
    +
    +/* Define all types of vendors and devices to support */
    +#define VENDOR1 0x1931 /* Vendor Option */
    +#define DEVICE1 0x000c /* HSDPA card */
    +
    +#define R_IIR 0x0000 /* Interrupt Identity Register */
    +#define R_FCR 0x0000 /* Flow Control Register */
    +#define R_IER 0x0004 /* Interrupt Enable Register */
    +
    +#define CONFIG_MAGIC 0xEFEFFEFE
    +#define TOGGLE_VALID 0x0000
    +
    +/* Definition of interrupt tokens */
    +#define MDM_DL1 0x0001
    +#define MDM_UL1 0x0002
    +#define MDM_DL2 0x0004
    +#define MDM_UL2 0x0008
    +#define DIAG_DL1 0x0010
    +#define DIAG_DL2 0x0020
    +#define DIAG_UL 0x0040
    +#define APP1_DL 0x0080
    +#define APP1_UL 0x0100
    +#define APP2_DL 0x0200
    +#define APP2_UL 0x0400
    +#define CTRL_DL 0x0800
    +#define CTRL_UL 0x1000
    +#define RESET 0x8000
    +
    +#define MDM_DL (MDM_DL1 | MDM_DL2)
    +#define MDM_UL (MDM_UL1 | MDM_UL2)
    +#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
    +
    +/* modem signal definition */
    +#define CTRL_DSR 0x0001
    +#define CTRL_DCD 0x0002
    +#define CTRL_RI 0x0004
    +#define CTRL_CTS 0x0008
    +
    +#define CTRL_DTR 0x0001
    +#define CTRL_RTS 0x0002
    +
    +#define MAX_PORT 4
    +#define NOZOMI_MAX_PORTS 5
    +
    +/* Type definitions */
    +
    +/*
    + * There are two types of nozomi cards,
    + * one with 2048 memory and with 8192 memory
    + */
    +enum card_type {
    + F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
    + F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
    +};
    +
    +/* Two different toggle channels exist */
    +enum channel_type {
    + CH_A = 0,
    + CH_B = 1,
    +};
    +
    +/* Port definition for the card regarding flow control */
    +enum ctrl_port_type {
    + CTRL_CMD = 0,
    + CTRL_MDM = 1,
    + CTRL_DIAG = 2,
    + CTRL_APP1 = 3,
    + CTRL_APP2 = 4,
    + CTRL_ERROR = -1,
    +};
    +
    +/* Ports that the nozomi has */
    +enum port_type {
    + PORT_MDM = 0,
    + PORT_DIAG = 1,
    + PORT_APP1 = 2,
    + PORT_APP2 = 3,
    + PORT_CTRL = 4,
    + PORT_ERROR = -1,
    +};
    +
    +#ifdef __ARMEB__
    +/* Big endian */
    +
    +struct toggles {
    + unsigned enabled:5; /*
    + * Toggle fields are valid if enabled is 0,
    + * else A-channels must always be used.
    + */
    + unsigned diag_dl:1;
    + unsigned mdm_dl:1;
    + unsigned mdm_ul:1;
    +} __attribute__ ((packed));
    +
    +/* Configuration table to read at startup of card */
    +/* Is for now only needed during initialization phase */
    +struct config_table {
    + u32 signature;
    + u16 product_information;
    + u16 version;
    + u8 pad3[3];
    + struct toggles toggle;
    + u8 pad1[4];
    + u16 dl_mdm_len1; /*
    + * If this is 64, it can hold
    + * 60 bytes + 4 that is length field
    + */
    + u16 dl_start;
    +
    + u16 dl_diag_len1;
    + u16 dl_mdm_len2; /*
    + * If this is 64, it can hold
    + * 60 bytes + 4 that is length field
    + */
    + u16 dl_app1_len;
    +
    + u16 dl_diag_len2;
    + u16 dl_ctrl_len;
    + u16 dl_app2_len;
    + u8 pad2[16];
    + u16 ul_mdm_len1;
    + u16 ul_start;
    + u16 ul_diag_len;
    + u16 ul_mdm_len2;
    + u16 ul_app1_len;
    + u16 ul_app2_len;
    + u16 ul_ctrl_len;
    +} __attribute__ ((packed));
    +
    +/* This stores all control downlink flags */
    +struct ctrl_dl {
    + u8 port;
    + unsigned reserved:4;
    + unsigned CTS:1;
    + unsigned RI:1;
    + unsigned DCD:1;
    + unsigned DSR:1;
    +} __attribute__ ((packed));
    +
    +/* This stores all control uplink flags */
    +struct ctrl_ul {
    + u8 port;
    + unsigned reserved:6;
    + unsigned RTS:1;
    + unsigned DTR:1;
    +} __attribute__ ((packed));
    +
    +#else
    +/* Little endian */
    +
    +/* This represents the toggle information */
    +struct toggles {
    + unsigned mdm_ul:1;
    + unsigned mdm_dl:1;
    + unsigned diag_dl:1;
    + unsigned enabled:5; /*
    + * Toggle fields are valid if enabled is 0,
    + * else A-channels must always be used.
    + */
    +} __attribute__ ((packed));
    +
    +/* Configuration table to read at startup of card */
    +struct config_table {
    + u32 signature;
    + u16 version;
    + u16 product_information;
    + struct toggles toggle;
    + u8 pad1[7];
    + u16 dl_start;
    + u16 dl_mdm_len1; /*
    + * If this is 64, it can hold
    + * 60 bytes + 4 that is length field
    + */
    + u16 dl_mdm_len2;
    + u16 dl_diag_len1;
    + u16 dl_diag_len2;
    + u16 dl_app1_len;
    + u16 dl_app2_len;
    + u16 dl_ctrl_len;
    + u8 pad2[16];
    + u16 ul_start;
    + u16 ul_mdm_len2;
    + u16 ul_mdm_len1;
    + u16 ul_diag_len;
    + u16 ul_app1_len;
    + u16 ul_app2_len;
    + u16 ul_ctrl_len;
    +} __attribute__ ((packed));
    +
    +/* This stores all control downlink flags */
    +struct ctrl_dl {
    + unsigned DSR:1;
    + unsigned DCD:1;
    + unsigned RI:1;
    + unsigned CTS:1;
    + unsigned reserverd:4;
    + u8 port;
    +} __attribute__ ((packed));
    +
    +/* This stores all control uplink flags */
    +struct ctrl_ul {
    + unsigned DTR:1;
    + unsigned RTS:1;
    + unsigned reserved:6;
    + u8 port;
    +} __attribute__ ((packed));
    +#endif
    +
    +/* This holds all information that is needed regarding a port */
    +struct port {
    + u8 update_flow_control;
    + struct ctrl_ul ctrl_ul;
    + struct ctrl_dl ctrl_dl;
    + struct kfifo *fifo_ul;
    + void __iomem *dl_addr[2];
    + u32 dl_size[2];
    + u8 toggle_dl;
    + void __iomem *ul_addr[2];
    + u32 ul_size[2];
    + u8 toggle_ul;
    + u16 token_dl;
    +
    + struct tty_struct *tty;
    + int tty_open_count;
    + struct semaphore tty_sem;
    + wait_queue_head_t tty_wait;
    + struct async_icount tty_icount;
    + int tty_index;
    + u32 rx_data, tx_data;
    +
    +};
    +
    +/* Private data one for each card in the system */
    +struct nozomi {
    + void __iomem *base_addr;
    + u8 closing;
    +
    + /* Pointers to registers */
    + void __iomem *reg_iir;
    + void __iomem *reg_fcr;
    + void __iomem *reg_ier;
    +
    + u16 last_ier;
    + enum card_type card_type;
    + struct config_table config_table; /* Configuration table */
    + struct pci_dev *pdev;
    + struct port port[NOZOMI_MAX_PORTS];
    + u8 *send_buf;
    +
    + struct tty_driver *tty_driver;
    +
    + struct ktermios *tty_termios[NTTY_TTY_MINORS];
    + struct ktermios *tty_termios_locked[NTTY_TTY_MINORS];
    + spinlock_t spin_mutex; /* secures access to registers and tty */
    +
    + u32 open_ttys;
    +};
    +
    +/* This is a data packet that is read or written to/from card */
    +struct buffer {
    + u32 size; /* size is the length of the data buffer */
    + u8 *data;
    +} __attribute__ ((packed));
    +
    +/* Function declarations */
    +static int ntty_tty_init(struct nozomi *dc);
    +
    +/* Global variables */
    +static struct pci_device_id nozomi_pci_tbl[] = {
    + {PCI_DEVICE(VENDOR1, DEVICE1)},
    + {},
    +};
    +
    +MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
    +
    +/* Used to store interrupt variables */
    +struct irq {
    + u16 read_iir; /* Holds current interrupt tokens */
    +};
    +
    +/* Representing the pci device of interest */
    +struct nozomi_devices {
    + struct list_head list;
    + struct nozomi *my_dev;
    + struct irq my_irq;
    + int index_start;
    +};
    +static atomic_t cards_found = ATOMIC_INIT(0);
    +static LIST_HEAD(my_devices);
    +
    +/*
    + * find card by tty_index
    + */
    +static struct nozomi *get_dc_by_index(s32 index)
    +{
    + struct list_head *p;
    + struct nozomi_devices *curdev;
    + int devidx;
    +
    + if (likely(atomic_read(&cards_found) == 1)) {
    + curdev = list_first_entry(&my_devices,
    + struct nozomi_devices, list);
    + return curdev->my_dev;
    + } else {
    + devidx = index - (index % NTTY_TTY_MINORS);
    +
    + list_for_each(p, &my_devices) {
    + curdev = list_entry(p, struct nozomi_devices, list);
    + if (curdev->index_start == devidx)
    + return curdev->my_dev;
    + }
    + }
    +
    + printk(KERN_ALERT "Fatal error: could not find device" \
    + " for tty-index %d\n", index);
    +
    + return NULL;
    +}
    +
    +static struct port *get_port_by_tty(const struct tty_struct *tty)
    +{
    + struct nozomi *ndev = get_dc_by_index(tty->index);
    + return ndev ? &ndev->port[tty->index % NTTY_TTY_MINORS] : NULL;
    +}
    +
    +static struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
    +{
    + return get_dc_by_index(tty->index);
    +}
    +
    +static int get_free_index(void)
    +{
    + struct list_head *p;
    + struct nozomi_devices *curdev;
    + u8 busy;
    + int new_index;
    +
    + for (new_index = 0; new_index < NTTY_TTY_MAXMINORS; new_index += 4) {
    + busy = 0;
    + list_for_each(p, &my_devices) {
    + curdev = list_entry(p, struct nozomi_devices, list);
    + if (curdev->index_start == new_index) {
    + ++busy;
    + break;
    + }
    + }
    +
    + if (!busy)
    + break;
    + }
    +
    + if (new_index >= NTTY_TTY_MAXMINORS)
    + return -ENODEV;
    +
    + return new_index;
    +}
    +
    +/*
    + * TODO:
    + * -Optimize
    + * -Rewrite cleaner
    + */
    +
    +static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
    + u32 size_bytes)
    +{
    + u32 i = 0;
    +#ifdef __ARMEB__
    + const u32 *ptr = (u32 *) mem_addr_start;
    +#else
    + const u32 *ptr = (__force u32 *) mem_addr_start;
    +#endif
    + u16 *buf16;
    +
    + if (unlikely(!ptr || !buf))
    + goto out;
    +
    + /* shortcut for extremely often used cases */
    + switch (size_bytes) {
    + case 2: /* 2 bytes */
    + buf16 = (u16 *) buf;
    +#ifdef __ARMEB__
    + *buf16 = __le16_to_cpu(readw(ptr));
    +#else
    + *buf16 = readw((void __iomem *)ptr);
    +#endif
    + goto out;
    + break;
    + case 4: /* 4 bytes */
    +#ifdef __ARMEB__
    + *(buf) = __le32_to_cpu(readl(ptr));
    +#else
    + *(buf) = readl((void __iomem *)ptr);
    +#endif
    + goto out;
    + break;
    + }
    +
    + while (i < size_bytes) {
    + if (size_bytes - i == 2) {
    + /* Handle 2 bytes in the end */
    + buf16 = (u16 *) buf;
    +#ifdef __ARMEB__
    + *(buf16) = __le16_to_cpu(readw(ptr));
    +#else
    + *(buf16) = readw((void __iomem *)ptr);
    +#endif
    + i += 2;
    + } else {
    + /* Read 4 bytes */
    +#ifdef __ARMEB__
    + *(buf) = __le32_to_cpu(readl(ptr));
    +#else
    + *(buf) = readl((void __iomem *)ptr);
    +#endif
    + i += 4;
    + }
    + buf++;
    + ptr++;
    + }
    +out:
    + return;
    +}
    +
    +/*
    + * TODO:
    + * -Optimize
    + * -Rewrite cleaner
    + */
    +static u32 write_mem32(void __iomem *mem_addr_start, u32 *buf,
    + u32 size_bytes)
    +{
    + u32 i = 0;
    +#ifdef __ARMEB__
    + u32 *ptr = (u32 *) mem_addr_start;
    +#else
    + u32 *ptr = (__force u32 *) mem_addr_start;
    +#endif
    + u16 *buf16;
    +
    + if (unlikely(!ptr || !buf))
    + return 0;
    +
    + /* shortcut for extremely often used cases */
    + switch (size_bytes) {
    + case 2: /* 2 bytes */
    + buf16 = (u16 *) buf;
    +#ifdef __ARMEB__
    + writew(__le16_to_cpu(*buf16), ptr);
    +#else
    + writew(*buf16, (void __iomem *)ptr);
    +#endif
    + return 2;
    + break;
    + case 4: /* 4 bytes */
    +#ifdef __ARMEB__
    + writel(__cpu_to_le32(*buf), ptr);
    +#else
    + writel(*buf, (void __iomem *)ptr);
    +#endif
    + return 4;
    + break;
    + }
    +
    + while (i < size_bytes) {
    + if (size_bytes - i == 2) {
    + /* 2 bytes */
    + buf16 = (u16 *) buf;
    +#ifdef __ARMEB__
    + writew(__le16_to_cpu(*buf16), ptr);
    +#else
    + writew(*buf16, (void __iomem *)ptr);
    +#endif
    + i += 2;
    + } else {
    + /* 4 bytes */
    +#ifdef __ARMEB__
    + writel(__cpu_to_le32(*buf), ptr);
    +#else
    + writel(*buf, (void __iomem *)ptr);
    +#endif
    + i += 4;
    + }
    + buf++;
    + ptr++;
    + }
    + return i;
    +}
    +
    +/* Setup pointers to different channels and also setup buffer sizes. */
    +static void setup_memory(struct nozomi *dc)
    +{
    + void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
    + /* The length reported is including the length field of 4 bytes,
    + * hence subtract with 4.
    + */
    + const u16 buff_offset = 4;
    +
    + /* Modem port dl configuration */
    + dc->port[PORT_MDM].dl_addr[CH_A] = offset;
    + dc->port[PORT_MDM].dl_addr[CH_B] =
    + (offset += dc->config_table.dl_mdm_len1);
    + dc->port[PORT_MDM].dl_size[CH_A] =
    + dc->config_table.dl_mdm_len1 - buff_offset;
    + dc->port[PORT_MDM].dl_size[CH_B] =
    + dc->config_table.dl_mdm_len2 - buff_offset;
    +
    + /* Diag port dl configuration */
    + dc->port[PORT_DIAG].dl_addr[CH_A] =
    + (offset += dc->config_table.dl_mdm_len2);
    + dc->port[PORT_DIAG].dl_size[CH_A] =
    + dc->config_table.dl_diag_len1 - buff_offset;
    + dc->port[PORT_DIAG].dl_addr[CH_B] =
    + (offset += dc->config_table.dl_diag_len1);
    + dc->port[PORT_DIAG].dl_size[CH_B] =
    + dc->config_table.dl_diag_len2 - buff_offset;
    +
    + /* App1 port dl configuration */
    + dc->port[PORT_APP1].dl_addr[CH_A] =
    + (offset += dc->config_table.dl_diag_len2);
    + dc->port[PORT_APP1].dl_size[CH_A] =
    + dc->config_table.dl_app1_len - buff_offset;
    +
    + /* App2 port dl configuration */
    + dc->port[PORT_APP2].dl_addr[CH_A] =
    + (offset += dc->config_table.dl_app1_len);
    + dc->port[PORT_APP2].dl_size[CH_A] =
    + dc->config_table.dl_app2_len - buff_offset;
    +
    + /* Ctrl dl configuration */
    + dc->port[PORT_CTRL].dl_addr[CH_A] =
    + (offset += dc->config_table.dl_app2_len);
    + dc->port[PORT_CTRL].dl_size[CH_A] =
    + dc->config_table.dl_ctrl_len - buff_offset;
    +
    + offset = dc->base_addr + dc->config_table.ul_start;
    +
    + /* Modem Port ul configuration */
    + dc->port[PORT_MDM].ul_addr[CH_A] = offset;
    + dc->port[PORT_MDM].ul_size[CH_A] =
    + dc->config_table.ul_mdm_len1 - buff_offset;
    + dc->port[PORT_MDM].ul_addr[CH_B] =
    + (offset += dc->config_table.ul_mdm_len1);
    + dc->port[PORT_MDM].ul_size[CH_B] =
    + dc->config_table.ul_mdm_len2 - buff_offset;
    +
    + /* Diag port ul configuration */
    + dc->port[PORT_DIAG].ul_addr[CH_A] =
    + (offset += dc->config_table.ul_mdm_len2);
    + dc->port[PORT_DIAG].ul_size[CH_A] =
    + dc->config_table.ul_diag_len - buff_offset;
    +
    + /* App1 port ul configuration */
    + dc->port[PORT_APP1].ul_addr[CH_A] =
    + (offset += dc->config_table.ul_diag_len);
    + dc->port[PORT_APP1].ul_size[CH_A] =
    + dc->config_table.ul_app1_len - buff_offset;
    +
    + /* App2 port ul configuration */
    + dc->port[PORT_APP2].ul_addr[CH_A] =
    + (offset += dc->config_table.ul_app1_len);
    + dc->port[PORT_APP2].ul_size[CH_A] =
    + dc->config_table.ul_app2_len - buff_offset;
    +
    + /* Ctrl ul configuration */
    + dc->port[PORT_CTRL].ul_addr[CH_A] =
    + (offset += dc->config_table.ul_app2_len);
    + dc->port[PORT_CTRL].ul_size[CH_A] =
    + dc->config_table.ul_ctrl_len - buff_offset;
    +}
    +
    +/* Dump config table under initalization phase */
    +#ifdef DEBUG
    +static void dump_table(const struct nozomi *dc)
    +{
    + DBG3("signature: 0x%08X", dc->config_table.signature);
    + DBG3("version: 0x%04X", dc->config_table.version);
    + DBG3("product_information: 0x%04X", \
    + dc->config_table.product_information);
    + DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
    + DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
    + DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
    + DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
    +
    + DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
    + DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
    + dc->config_table.dl_mdm_len1);
    + DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
    + dc->config_table.dl_mdm_len2);
    + DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
    + dc->config_table.dl_diag_len1);
    + DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
    + dc->config_table.dl_diag_len2);
    + DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
    + dc->config_table.dl_app1_len);
    + DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
    + dc->config_table.dl_app2_len);
    + DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
    + dc->config_table.dl_ctrl_len);
    + DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
    + dc->config_table.ul_start);
    + DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
    + dc->config_table.ul_mdm_len1);
    + DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
    + dc->config_table.ul_mdm_len2);
    + DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
    + dc->config_table.ul_diag_len);
    + DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
    + dc->config_table.ul_app1_len);
    + DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
    + dc->config_table.ul_app2_len);
    + DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
    + dc->config_table.ul_ctrl_len);
    +}
    +#else
    +static __inline__ void dump_table(const struct nozomi *dc) { }
    +#endif
    +
    +/*
    + * Read configuration table from card under intalization phase
    + * Returns 1 if ok, else 0
    + */
    +static int nozomi_read_config_table(struct nozomi *dc)
    +{
    + read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
    + sizeof(struct config_table));
    +
    + if (dc->config_table.signature != CONFIG_MAGIC) {
    + dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
    + dc->config_table.signature, CONFIG_MAGIC);
    + return 0;
    + }
    +
    + if ((dc->config_table.version == 0)
    + || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
    + int i;
    + DBG1("Second phase, configuring card");
    +
    + setup_memory(dc);
    +
    + dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
    + dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
    + dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
    + DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
    + dc->port[PORT_MDM].toggle_ul,
    + dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
    +
    + dump_table(dc);
    +
    + for (i = PORT_MDM; i < MAX_PORT; i++) {
    + dc->port[i].fifo_ul =
    + kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
    + memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
    + memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
    + }
    +
    + /* Enable control channel */
    + dc->last_ier = dc->last_ier | CTRL_DL;
    + writew(dc->last_ier, dc->reg_ier);
    +
    + dev_info(&dc->pdev->dev, "Initialization OK!\n");
    + return 1;
    + }
    +
    + if ((dc->config_table.version > 0)
    + && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
    + u32 offset = 0;
    + DBG1("First phase: pushing upload buffers, clearing download");
    +
    + dev_info(&dc->pdev->dev, "Version of card: %d\n",
    + dc->config_table.version);
    +
    + /* Here we should disable all I/O over F32. */
    + setup_memory(dc);
    +
    + /*
    + * We should send ALL channel pair tokens back along
    + * with reset token
    + */
    +
    + /* push upload modem buffers */
    + write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
    + (u32 *) &offset, 4);
    + write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
    + (u32 *) &offset, 4);
    +
    + writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
    +
    + DBG1("First phase done");
    + }
    +
    + return 1;
    +}
    +
    +/* Enable uplink interrupts */
    +static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
    +{
    + u16 mask[NOZOMI_MAX_PORTS] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
    +
    + if (port < NOZOMI_MAX_PORTS) {
    + dc->last_ier |= mask[port];
    + writew(dc->last_ier, dc->reg_ier);
    + } else {
    + dev_err(&dc->pdev->dev, "Called with wrong port?\n");
    + }
    +}
    +
    +/* Disable uplink interrupts */
    +static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
    +{
    + u16 mask[NOZOMI_MAX_PORTS] = \
    + {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
    +
    + if (port < NOZOMI_MAX_PORTS) {
    + dc->last_ier &= mask[port];
    + writew(dc->last_ier, dc->reg_ier);
    + } else {
    + dev_err(&dc->pdev->dev, "Called with wrong port?\n");
    + }
    +}
    +
    +/* Enable downlink interrupts */
    +static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
    +{
    + u16 mask[NOZOMI_MAX_PORTS] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
    +
    + if (port < NOZOMI_MAX_PORTS) {
    + dc->last_ier |= mask[port];
    + writew(dc->last_ier, dc->reg_ier);
    + } else {
    + dev_err(&dc->pdev->dev, "Called with wrong port?\n");
    + }
    +}
    +
    +/* Disable downlink interrupts */
    +static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
    +{
    + u16 mask[NOZOMI_MAX_PORTS] = \
    + {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
    +
    + if (port < NOZOMI_MAX_PORTS) {
    + dc->last_ier &= mask[port];
    + writew(dc->last_ier, dc->reg_ier);
    + } else {
    + dev_err(&dc->pdev->dev, "Called with wrong port?\n");
    + }
    +}
    +
    +/*
    + * Return 1 - send buffer to card and ack.
    + * Return 0 - don't ack, don't send buffer to card.
    + */
    +static int send_data(enum port_type index, struct nozomi *dc)
    +{
    + u32 size = 0;
    + struct port *port = &dc->port[index];
    + u8 toggle = port->toggle_ul;
    + void __iomem *addr = port->ul_addr[toggle];
    + u32 ul_size = port->ul_size[toggle];
    + struct tty_struct *tty = port->tty;
    +
    + /* Get data from tty and place in buf for now */
    + size = __kfifo_get(port->fifo_ul, dc->send_buf,
    + ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
    +
    + if (size == 0) {
    + DBG4("No more data to send, disable link:");
    + return 0;
    + }
    +
    + port->tx_data += size;
    +
    + /* DUMP(buf, size); */
    +
    + /* Write length + data */
    + write_mem32(addr, (u32 *) &size, 4);
    + write_mem32(addr + 4, (u32 *) dc->send_buf, size);
    +
    + if (tty)
    + tty_wakeup(tty);
    +
    + return 1;
    +}
    +
    +/* If all data has been read, return 1, else 0 */
    +static int receive_data(enum port_type index, struct nozomi *dc)
    +{
    + u8 buf[RECEIVE_BUF_MAX] = { 0 };
    + int size;
    + u32 offset = 4;
    + struct port *port = &dc->port[index];
    + void __iomem *addr = port->dl_addr[port->toggle_dl];
    + struct tty_struct *tty = port->tty;
    + int i;
    +
    + if (unlikely(!tty)) {
    + DBG1("tty not open for port: %d?", index);
    + return 1;
    + }
    +
    + read_mem32((u32 *) &size, addr, 4);
    + /* DBG1( "%d bytes port: %d", size, index); */
    +
    + if (test_bit(TTY_THROTTLED, &tty->flags)) {
    + DBG1("No room in tty, don't read data, don't ack interrupt, "
    + "disable interrupt");
    +
    + /* disable interrupt in downlink... */
    + disable_transmit_dl(index, dc);
    + return 0;
    + }
    +
    + if (unlikely(size == 0)) {
    + dev_err(&dc->pdev->dev, "size == 0?\n");
    + return 1;
    + }
    +
    + port->rx_data += size;
    +
    + tty_buffer_request_room(tty, size);
    +
    + while (size > 0) {
    + read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
    +
    + if (size == 1) {
    + tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
    + size = 0;
    + } else if (size < RECEIVE_BUF_MAX) {
    + size -= tty_insert_flip_string(tty, (char *) buf, size);
    + } else {
    + i = tty_insert_flip_string(tty, \
    + (char *) buf, RECEIVE_BUF_MAX);
    + size -= i;
    + offset += i;
    + }
    + }
    +
    + tty_flip_buffer_push(tty);
    +
    + return 1;
    +}
    +
    +/* Debug for interrupts */
    +#ifdef DEBUG
    +static char *interrupt2str(u16 interrupt)
    +{
    + static char buf[TMP_BUF_MAX];
    + char *p = buf;
    +
    + interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
    + interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "MDM_DL2 ") : NULL;
    +
    + interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "MDM_UL1 ") : NULL;
    + interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "MDM_UL2 ") : NULL;
    +
    + interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "DIAG_DL1 ") : NULL;
    + interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "DIAG_DL2 ") : NULL;
    +
    + interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "DIAG_UL ") : NULL;
    +
    + interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "APP1_DL ") : NULL;
    + interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "APP2_DL ") : NULL;
    +
    + interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "APP1_UL ") : NULL;
    + interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "APP2_UL ") : NULL;
    +
    + interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "CTRL_DL ") : NULL;
    + interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "CTRL_UL ") : NULL;
    +
    + interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
    + "RESET ") : NULL;
    +
    + return buf;
    +}
    +#endif
    +
    +/*
    + * Receive flow control
    + * Return 1 - If ok, else 0
    + */
    +static int receive_flow_control(struct nozomi *dc, struct irq *m)
    +{
    + enum port_type port = PORT_MDM;
    + struct ctrl_dl ctrl_dl;
    + struct ctrl_dl old_ctrl;
    + u16 enable_ier = 0;
    +
    + read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
    +
    + switch (ctrl_dl.port) {
    + case CTRL_CMD:
    + DBG1("The Base Band sends this value as a response to a "
    + "request for IMSI detach sent over the control "
    + "channel uplink (see section 7.6.1).");
    + break;
    + case CTRL_MDM:
    + port = PORT_MDM;
    + enable_ier = MDM_DL;
    + break;
    + case CTRL_DIAG:
    + port = PORT_DIAG;
    + enable_ier = DIAG_DL;
    + break;
    + case CTRL_APP1:
    + port = PORT_APP1;
    + enable_ier = APP1_DL;
    + break;
    + case CTRL_APP2:
    + port = PORT_APP2;
    + enable_ier = APP2_DL;
    + break;
    + default:
    + dev_err(&dc->pdev->dev,
    + "ERROR: flow control received for non-existing port\n");
    + return 0;
    + };
    +
    + DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
    + *((u16 *)&ctrl_dl));
    +
    + old_ctrl = dc->port[port].ctrl_dl;
    + dc->port[port].ctrl_dl = ctrl_dl;
    +
    + if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
    + DBG1("Disable interrupt (0x%04X) on port: %d",
    + enable_ier, port);
    + disable_transmit_ul(port, dc);
    +
    + } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
    +
    + if (__kfifo_len(dc->port[port].fifo_ul)) {
    + DBG1("Enable interrupt (0x%04X) on port: %d",
    + enable_ier, port);
    + DBG1("Data in buffer [%d], enable transmit! ",
    + __kfifo_len(dc->port[port].fifo_ul));
    + enable_transmit_ul(port, dc);
    + } else {
    + DBG1("No data in buffer...");
    + }
    + }
    +
    + if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
    + DBG1(" No change in mctrl");
    + return 1;
    + }
    + /* Update statistics */
    + if (old_ctrl.CTS != ctrl_dl.CTS)
    + dc->port[port].tty_icount.cts++;
    + if (old_ctrl.DSR != ctrl_dl.DSR)
    + dc->port[port].tty_icount.dsr++;
    + if (old_ctrl.RI != ctrl_dl.RI)
    + dc->port[port].tty_icount.rng++;
    + if (old_ctrl.DCD != ctrl_dl.DCD)
    + dc->port[port].tty_icount.dcd++;
    + DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
    + port,
    + dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
    + dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
    +
    + return 1;
    +}
    +
    +static enum ctrl_port_type port2ctrl(enum port_type port,
    + const struct nozomi *dc)
    +{
    + switch (port) {
    + case PORT_MDM:
    + return CTRL_MDM;
    + case PORT_DIAG:
    + return CTRL_DIAG;
    + case PORT_APP1:
    + return CTRL_APP1;
    + case PORT_APP2:
    + return CTRL_APP2;
    + default:
    + dev_err(&dc->pdev->dev,
    + "ERROR: send flow control " \
    + "received for non-existing port\n");
    + };
    + return CTRL_ERROR;
    +}
    +
    +/*
    + * Send flow control, can only update one channel at a time
    + * Return 0 - If we have updated all flow control
    + * Return 1 - If we need to update more flow control, ack current enable more
    + */
    +static int send_flow_control(struct nozomi *dc)
    +{
    + u32 i, more_flow_control_to_be_updated = 0;
    + u16 *ctrl;
    +
    + for (i = PORT_MDM; i < MAX_PORT; i++) {
    + if (dc->port[i].update_flow_control) {
    + if (more_flow_control_to_be_updated) {
    + /* We have more flow control to be updated */
    + return 1;
    + }
    + dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
    + ctrl = (u16 *)&dc->port[i].ctrl_ul;
    + write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
    + (u32 *) ctrl, 2);
    + dc->port[i].update_flow_control = 0;
    + more_flow_control_to_be_updated = 1;
    + }
    + }
    + return 0;
    +}
    +
    +/*
    + * Handle donlink data, ports that are handled are modem and diagnostics
    + * Return 1 - ok
    + * Return 0 - toggle fields are out of sync
    + */
    +static int handle_data_dl(struct nozomi *dc, struct irq *m, enum port_type port,
    + u8 *toggle, u16 mask1, u16 mask2)
    +{
    + if (*toggle == 0 && m->read_iir & mask1) {
    + if (receive_data(port, dc)) {
    + writew(mask1, dc->reg_fcr);
    + *toggle = !(*toggle);
    + }
    +
    + if (m->read_iir & mask2) {
    + if (receive_data(port, dc)) {
    + writew(mask2, dc->reg_fcr);
    + *toggle = !(*toggle);
    + }
    + }
    + } else if (*toggle == 1 && m->read_iir & mask2) {
    + if (receive_data(port, dc)) {
    + writew(mask2, dc->reg_fcr);
    + *toggle = !(*toggle);
    + }
    +
    + if (m->read_iir & mask1) {
    + if (receive_data(port, dc)) {
    + writew(mask1, dc->reg_fcr);
    + *toggle = !(*toggle);
    + }
    + }
    + } else {
    + dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
    + *toggle);
    + return 0;
    + }
    + return 1;
    +}
    +
    +/*
    + * Handle uplink data, this is currently for the modem port
    + * Return 1 - ok
    + * Return 0 - toggle field are out of sync
    + */
    +static int handle_data_ul(struct nozomi *dc, struct irq *m, enum port_type port)
    +{
    + u8 *toggle = &(dc->port[port].toggle_ul);
    +
    + if (*toggle == 0 && m->read_iir & MDM_UL1) {
    + dc->last_ier &= ~MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(port, dc)) {
    + writew(MDM_UL1, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + *toggle = !*toggle;
    + }
    +
    + if (m->read_iir & MDM_UL2) {
    + dc->last_ier &= ~MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(port, dc)) {
    + writew(MDM_UL2, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + *toggle = !*toggle;
    + }
    + }
    +
    + } else if (*toggle == 1 && m->read_iir & MDM_UL2) {
    + dc->last_ier &= ~MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(port, dc)) {
    + writew(MDM_UL2, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + *toggle = !*toggle;
    + }
    +
    + if (m->read_iir & MDM_UL1) {
    + dc->last_ier &= ~MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(port, dc)) {
    + writew(MDM_UL1, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | MDM_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + *toggle = !*toggle;
    + }
    + }
    + } else {
    + writew(m->read_iir & MDM_UL, dc->reg_fcr);
    + dev_err(&dc->pdev->dev, "port out of sync!\n");
    + return 0;
    + }
    + return 1;
    +}
    +
    +static irqreturn_t interrupt_handler(int irq, void *dev_id)
    +{
    + struct nozomi_devices *ndev = dev_id;
    + struct nozomi *dc;
    + struct irq *m;
    +
    + if (!ndev)
    + return IRQ_NONE;
    +
    + dc = ndev->my_dev;
    + m = &ndev->my_irq;
    +
    + spin_lock(&dc->spin_mutex);
    + m->read_iir = readw(dc->reg_iir);
    +
    + /* Card removed */
    + if (m->read_iir == (u16)-1)
    + goto none;
    + /*
    + * Just handle interrupt enabled in IER
    + * (by masking with dc->last_ier)
    + */
    + m->read_iir &= dc->last_ier;
    +
    + if (m->read_iir == 0)
    + goto none;
    +
    +
    + DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(m->read_iir),
    + m->read_iir, dc->last_ier);
    +
    + if (m->read_iir & RESET) {
    + if (unlikely(!nozomi_read_config_table(dc))) {
    + dc->last_ier = 0x0;
    + writew(dc->last_ier, dc->reg_ier);
    + dev_err(&dc->pdev->dev, "Could not read status from "
    + "card, we should disable interface\n");
    + } else {
    + writew(RESET, dc->reg_fcr);
    + }
    + /* No more useful info if this was the reset interrupt. */
    + goto exit_handler;
    + }
    + if (m->read_iir & CTRL_UL) {
    + DBG1("CTRL_UL");
    + dc->last_ier &= ~CTRL_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_flow_control(dc)) {
    + writew(CTRL_UL, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | CTRL_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + }
    + }
    + if (m->read_iir & CTRL_DL) {
    + receive_flow_control(dc, m);
    + writew(CTRL_DL, dc->reg_fcr);
    + }
    + if (m->read_iir & MDM_DL) {
    + if (!handle_data_dl(dc, m, PORT_MDM,
    + &(dc->port[PORT_MDM].toggle_dl), MDM_DL1,
    + MDM_DL2)) {
    + dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
    + goto exit_handler;
    + }
    + }
    + if (m->read_iir & MDM_UL) {
    + if (!handle_data_ul(dc, m, PORT_MDM)) {
    + dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
    + goto exit_handler;
    + }
    + }
    + if (m->read_iir & DIAG_DL) {
    + if (!handle_data_dl(dc, m, PORT_DIAG,
    + &(dc->port[PORT_DIAG].toggle_dl), DIAG_DL1,
    + DIAG_DL2)) {
    + dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
    + goto exit_handler;
    + }
    + }
    + if (m->read_iir & DIAG_UL) {
    + dc->last_ier &= ~DIAG_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(PORT_DIAG, dc)) {
    + writew(DIAG_UL, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | DIAG_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + }
    + }
    + if (m->read_iir & APP1_DL) {
    + if (receive_data(PORT_APP1, dc))
    + writew(APP1_DL, dc->reg_fcr);
    + }
    + if (m->read_iir & APP1_UL) {
    + dc->last_ier &= ~APP1_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(PORT_APP1, dc)) {
    + writew(APP1_UL, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | APP1_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + }
    + }
    + if (m->read_iir & APP2_DL) {
    + if (receive_data(PORT_APP2, dc))
    + writew(APP2_DL, dc->reg_fcr);
    + }
    + if (m->read_iir & APP2_UL) {
    + dc->last_ier &= ~APP2_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + if (send_data(PORT_APP2, dc)) {
    + writew(APP2_UL, dc->reg_fcr);
    + dc->last_ier = dc->last_ier | APP2_UL;
    + writew(dc->last_ier, dc->reg_ier);
    + }
    + }
    +
    +exit_handler:
    + spin_unlock(&dc->spin_mutex);
    + return IRQ_HANDLED;
    +none:
    + spin_unlock(&dc->spin_mutex);
    + return IRQ_NONE;
    +}
    +
    +/* Request a shared IRQ from system */
    +static int nozomi_setup_interrupt(struct nozomi_devices *ndev)
    +{
    + int rval;
    +
    + rval = request_irq(ndev->my_dev->pdev->irq, &interrupt_handler,
    + IRQF_SHARED, NOZOMI_NAME, ndev);
    + if (unlikely(rval))
    + dev_err(&ndev->my_dev->pdev->dev, "Cannot open because IRQ %d "
    + "is already in use.\n", ndev->my_dev->pdev->irq);
    +
    + return rval;
    +}
    +
    +static void nozomi_get_card_type(struct nozomi *dc)
    +{
    + int i;
    + u32 size = 0;
    +
    + for (i = 0; i < 6; i++)
    + size += pci_resource_len(dc->pdev, i);
    +
    + /* Assume card type F32_8 if no match */
    + dc->card_type = size == 2048 ? F32_2 : F32_8;
    +
    + dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
    +}
    +
    +static void nozomi_setup_private_data(struct nozomi *dc)
    +{
    + void __iomem *offset = dc->base_addr + dc->card_type / 2;
    + int i;
    +
    + dc->reg_fcr = (void __iomem *)(offset + R_FCR);
    + dc->reg_iir = (void __iomem *)(offset + R_IIR);
    + dc->reg_ier = (void __iomem *)(offset + R_IER);
    + dc->last_ier = 0;
    + dc->closing = 0;
    +
    + dc->port[PORT_MDM].token_dl = MDM_DL;
    + dc->port[PORT_DIAG].token_dl = DIAG_DL;
    + dc->port[PORT_APP1].token_dl = APP1_DL;
    + dc->port[PORT_APP2].token_dl = APP2_DL;
    +
    + for (i = PORT_MDM; i < MAX_PORT; ++i) {
    + dc->port[i].rx_data = 0;
    + dc->port[i].tx_data = 0;
    + }
    +}
    +
    +static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
    + char *buf)
    +{
    + struct pci_dev *pdev = to_pci_dev(dev);
    + struct nozomi_devices *deventry = pci_get_drvdata(pdev);
    +
    + return sprintf(buf, "%d\n", deventry->my_dev->card_type);
    +}
    +static DEVICE_ATTR(card_type, 0444, card_type_show, NULL);
    +
    +static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
    + char *buf)
    +{
    + struct pci_dev *pdev = to_pci_dev(dev);
    + struct nozomi_devices *deventry = pci_get_drvdata(pdev);
    +
    + return sprintf(buf, "%u\n", deventry->my_dev->open_ttys);
    +}
    +static DEVICE_ATTR(open_ttys, 0444, open_ttys_show, NULL);
    +
    +static void make_sysfs_files(struct nozomi *dc)
    +{
    + if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
    + dev_err(&dc->pdev->dev,
    + "Could not create sysfs file for card_type\n");
    + if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
    + dev_err(&dc->pdev->dev,
    + "Could not create sysfs file for open_ttys\n");
    +}
    +
    +static void remove_sysfs_files(struct nozomi *dc)
    +{
    + device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
    + device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
    +}
    +
    +/* Allocate memory for one device */
    +static int __devinit nozomi_card_init(struct pci_dev *pdev,
    + const struct pci_device_id *ent)
    +{
    + resource_size_t start;
    + int ret = -EIO;
    + struct nozomi *dc = NULL;
    + struct nozomi_devices *newdev = NULL;
    + struct nozomi_devices *first = NULL;
    + int new_index;
    + int i;
    +
    + atomic_inc(&cards_found);
    + dev_dbg(&pdev->dev, "Init, cards_found: %d\n",
    + atomic_read(&cards_found));
    +
    + dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
    + if (unlikely(!dc)) {
    + dev_err(&pdev->dev, "Could not allocate memory\n");
    + return -ENOMEM;
    + }
    + newdev = kzalloc(sizeof(struct nozomi_devices), GFP_KERNEL);
    + if (unlikely(!newdev)) {
    + dev_err(&pdev->dev, "Could not allocate memory\n");
    + kfree(dc);
    + return -ENOMEM;
    + }
    +
    + dc->pdev = pdev;
    + newdev->my_dev = dc;
    + pci_set_drvdata(pdev, newdev);
    +
    + /* Find out what card type it is */
    + nozomi_get_card_type(dc);
    +
    + if (pci_enable_device(dc->pdev)) {
    + dev_err(&pdev->dev, "Failed to enable PCI Device\n");
    + kfree(dc);
    + kfree(newdev);
    + return -ENODEV;
    + }
    +
    + start = pci_resource_start(dc->pdev, 0);
    + if (start == 0) {
    + dev_err(&pdev->dev, "No I/O address for card detected\n");
    + ret = -ENODEV;
    + goto err_disable_device;
    + }
    +
    + dc->base_addr = ioremap(start, dc->card_type);
    + if (!dc->base_addr) {
    + dev_err(&pdev->dev, "Unable to map card MMIO\n");
    + ret = -ENODEV;
    + goto err_disable_device;
    + }
    +
    + dc->open_ttys = 0;
    +
    + nozomi_setup_private_data(dc);
    +
    + if (pci_request_regions(dc->pdev, NOZOMI_NAME)) {
    + dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
    + (int) /* nozomi_private.io_addr */ 0);
    + ret = -EIO;
    + goto err_disable_regions;
    + }
    +
    + dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
    + if (!dc->send_buf) {
    + dev_err(&pdev->dev, "Could not allocate send buffer?\n");
    + goto err_disable_regions;
    + }
    +
    + /* Disable all interrupts */
    + dc->last_ier = 0;
    + writew(dc->last_ier, dc->reg_ier);
    +
    + /* Setup interrupt handler */
    + if (nozomi_setup_interrupt(newdev)) {
    + ret = -EIO;
    + goto err_disable_regions;
    + }
    +
    + DBG1("base_addr: %p", dc->base_addr);
    +
    + spin_lock_init(&dc->spin_mutex);
    +
    + new_index = get_free_index();
    + if (new_index < 0) {
    + dev_err(&pdev->dev, "already reached maximum card count.\n");
    + ret = -EIO;
    + goto err_disable_regions;
    + }
    +
    + make_sysfs_files(dc);
    +
    + if (atomic_read(&cards_found) == 1) {
    + ntty_tty_init(dc);
    + } else {
    + first = list_first_entry(&my_devices, struct nozomi_devices,
    + list);
    + dc->tty_driver = first->my_dev->tty_driver;
    + }
    +
    + for (i = 0; i < NTTY_TTY_MINORS; i++) {
    + init_MUTEX(&dc->port[i].tty_sem);
    + dc->port[i].tty_open_count = 0;
    + dc->port[i].tty = NULL;
    + tty_register_device(dc->tty_driver, new_index + i,
    + &dc->pdev->dev);
    + }
    + newdev->index_start = new_index;
    +
    + /* Enable RESET interrupt. */
    + dc->last_ier = RESET;
    + writew(dc->last_ier, dc->reg_ier);
    +
    + INIT_LIST_HEAD(&newdev->list);
    + list_add_tail(&newdev->list, &my_devices);
    +
    + pci_set_drvdata(pdev, newdev);
    +
    + return 0;
    +
    +err_disable_regions:
    + pci_release_regions(pdev);
    + iounmap(dc->base_addr);
    + dc->base_addr = NULL;
    +
    +err_disable_device:
    + pci_disable_device(pdev);
    + kfree(dc);
    + kfree(newdev);
    + return ret;
    +}
    +
    +static void tty_do_close(struct nozomi *dc, struct port *port)
    +{
    + unsigned long flags;
    +
    + if (!dc || !port)
    + return;
    +
    + if (down_interruptible(&port->tty_sem))
    + return;
    +
    + if (!port->tty_open_count)
    + goto exit;
    +
    + dc->open_ttys--;
    + port->tty_open_count--;
    +
    + if (port->tty_open_count == 0) {
    + DBG1("close: %d", port->token_dl);
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + dc->last_ier &= ~(port->token_dl);
    + writew(dc->last_ier, dc->reg_ier);
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    + }
    +
    +exit:
    + up(&port->tty_sem);
    +}
    +
    +static void __devexit tty_exit(struct nozomi_devices *ndev)
    +{
    + struct nozomi *dc = ndev->my_dev;
    + int i, ret;
    +
    + DBG1(" ");
    +
    + flush_scheduled_work();
    +
    + for (i = 0; i < NTTY_TTY_MINORS; ++i)
    + if (dc->port[i].tty && \
    + list_empty(&dc->port[i].tty->hangup_work.entry))
    + tty_hangup(dc->port[i].tty);
    +
    + while (dc->open_ttys)
    + msleep(1);
    +
    + for (i = ndev->index_start; i < ndev->index_start + NTTY_TTY_MINORS; \
    + ++i)
    + tty_unregister_device(dc->tty_driver, i);
    +
    + /* only unregister ttydriver if its the last card available */
    + if (atomic_read(&cards_found) == 1) {
    + ret = tty_unregister_driver(dc->tty_driver);
    + if (ret)
    + printk(KERN_ERR "Unable to unregister the tty driver !"
    + " (%d)\n", ret);
    + put_tty_driver(dc->tty_driver);
    + }
    +}
    +
    +/* Deallocate memory for one device */
    +static void __devexit nozomi_card_exit(struct pci_dev *pdev)
    +{
    + int i;
    + struct ctrl_ul ctrl;
    + struct nozomi_devices *deventry = pci_get_drvdata(pdev);
    + struct nozomi *dc = deventry->my_dev;
    +
    + /* Disable all interrupts */
    + dc->last_ier = 0;
    + writew(dc->last_ier, dc->reg_ier);
    +
    + tty_exit(deventry);
    +
    + /* Send 0x0001, command card to resend the reset token. */
    + /* This is to get the reset when the module is reloaded. */
    + ctrl.port = 0x00;
    + ctrl.reserved = 0;
    + ctrl.RTS = 0;
    + ctrl.DTR = 1;
    + DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
    +
    + /* Setup dc->reg addresses to we can use defines here */
    + nozomi_setup_private_data(dc);
    + write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
    + writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
    +
    + DBG1("pci_release_regions");
    + pci_release_regions(pdev);
    +
    + if (dc->base_addr)
    + iounmap(dc->base_addr);
    +
    + DBG1("pci_disable_device");
    + pci_disable_device(pdev);
    +
    + free_irq(pdev->irq, deventry);
    +
    + for (i = PORT_MDM; i < MAX_PORT; i++)
    + kfree(dc->port[i].fifo_ul);
    +
    + kfree(dc->send_buf);
    +
    + remove_sysfs_files(dc);
    +
    + kfree(dc);
    + deventry->my_dev = NULL;
    +
    + list_del(&deventry->list);
    + kfree(deventry);
    +
    + atomic_dec(&cards_found);
    +}
    +
    +static void set_rts(int index, int rts)
    +{
    + struct nozomi *dc = get_dc_by_index(index);
    + int devindex = index % NTTY_TTY_MINORS;
    +
    + dc->port[devindex].ctrl_ul.RTS = rts;
    + dc->port[devindex].update_flow_control = 1;
    + enable_transmit_ul(PORT_CTRL, dc);
    +}
    +
    +static void set_dtr(int index, int dtr)
    +{
    + struct nozomi *dc = get_dc_by_index(index);
    + int devindex = index % NTTY_TTY_MINORS;
    +
    + DBG1("SETTING DTR index: %d, dtr: %d", index, dtr);
    +
    + dc->port[devindex].ctrl_ul.DTR = dtr;
    + dc->port[devindex].update_flow_control = 1;
    + enable_transmit_ul(PORT_CTRL, dc);
    +}
    +
    +/*
    + * ----------------------------------------------------------------------------
    + * TTY code
    + * ----------------------------------------------------------------------------
    + */
    +
    +/* Called when the userspace process opens the tty, /dev/noz*. */
    +static int ntty_open(struct tty_struct *tty, struct file *file)
    +{
    + struct port *port = get_port_by_tty(tty);
    + struct nozomi *dc = get_dc_by_tty(tty);
    + unsigned long flags;
    +
    + if (!port || !dc)
    + return -ENODEV;
    +
    + if (down_interruptible(&port->tty_sem))
    + return -ERESTARTSYS;
    +
    + port->tty_open_count++;
    + dc->open_ttys++;
    +
    + /* Enable interrupt downlink for channel */
    + if (port->tty_open_count == 1) {
    + tty->low_latency = 1;
    + tty->driver_data = port;
    + port->tty = tty;
    + port->tty_index = tty->index;
    + port->rx_data = 0;
    + port->tx_data = 0;
    + DBG1("open: %d", port->token_dl);
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + dc->last_ier = dc->last_ier | port->token_dl;
    + writew(dc->last_ier, dc->reg_ier);
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    + }
    +
    + up(&port->tty_sem);
    +
    + return 0;
    +}
    +
    +/* Called when the userspace process close the tty, /dev/noz*. */
    +static void ntty_close(struct tty_struct *tty, struct file *file)
    +{
    + struct nozomi *dc = get_dc_by_tty(tty);
    + tty_do_close(dc, (struct port *)tty->driver_data);
    +}
    +
    +/*
    + * called when the userspace process writes to the tty (/dev/noz*).
    + * Data is inserted into a fifo, which is then read and transfered to the modem.
    + */
    +static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
    + int count)
    +{
    + int rval = -EINVAL;
    + struct nozomi *dc = get_dc_by_tty(tty);
    + struct port *port = (struct port *)tty->driver_data;
    + unsigned long flags;
    +
    + /* DBG1( "WRITEx: %d, index = %d", count, index); */
    +
    + if (!dc || !port)
    + return -ENODEV;
    +
    + if (unlikely(down_trylock(&port->tty_sem))) {
    + /*
    + * must test lock as tty layer wraps calls
    + * to this function with BKL
    + */
    + dev_err(&dc->pdev->dev, "Would have deadlocked - "
    + "return ERESTARTSYS\n");
    + return -ERESTARTSYS;
    + }
    +
    + if (unlikely(!port->tty_open_count)) {
    + DBG1(" ");
    + goto exit;
    + }
    +
    + rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
    +
    + /* notify card */
    + if (unlikely(dc == NULL)) {
    + DBG1("No device context?");
    + goto exit;
    + }
    +
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + /* CTS is only valid on the modem channel */
    + if (port == &(dc->port[PORT_MDM])) {
    + if (port->ctrl_dl.CTS) {
    + DBG4("Enable interrupt");
    + enable_transmit_ul(port->tty_index % NTTY_TTY_MINORS,
    + dc);
    + } else {
    + dev_err(&dc->pdev->dev,
    + "CTS not active on modem port?\n");
    + }
    + } else {
    + enable_transmit_ul(port->tty_index % NTTY_TTY_MINORS, dc);
    + }
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    +
    +exit:
    + up(&port->tty_sem);
    + return rval;
    +}
    +
    +/*
    + * Calculate how much is left in device
    + * This method is called by the upper tty layer.
    + * #according to sources N_TTY.c it expects a value >= 0 and
    + * does not check for negative values.
    + */
    +static int ntty_write_room(struct tty_struct *tty)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    + int room = 0;
    + struct nozomi *dc = get_dc_by_tty(tty);
    +
    + if (!dc || !port)
    + return 0;
    + if (down_trylock(&port->tty_sem))
    + return 0;
    +
    + if (!port->tty_open_count)
    + goto exit;
    +
    + room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
    +
    +exit:
    + up(&port->tty_sem);
    + return room;
    +}
    +
    +/* Gets io control parameters */
    +static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
    +{
    + struct port *port = tty->driver_data;
    + struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
    + struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
    +
    + return 0 | (ctrl_ul->RTS ? TIOCM_RTS : 0)
    + | (ctrl_ul->DTR ? TIOCM_DTR : 0)
    + | (ctrl_dl->DCD ? TIOCM_CAR : 0)
    + | (ctrl_dl->RI ? TIOCM_RNG : 0)
    + | (ctrl_dl->DSR ? TIOCM_DSR : 0)
    + | (ctrl_dl->CTS ? TIOCM_CTS : 0);
    +}
    +
    +/* Sets io controls parameters */
    +static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
    + unsigned int set, unsigned int clear)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    +
    + if (set & TIOCM_RTS)
    + set_rts(port->tty_index, 1);
    + else if (clear & TIOCM_RTS)
    + set_rts(port->tty_index, 0);
    +
    + if (set & TIOCM_DTR)
    + set_dtr(port->tty_index, 1);
    + else if (clear & TIOCM_DTR)
    + set_dtr(port->tty_index, 0);
    +
    + return 0;
    +}
    +
    +static int ntty_ioctl_tiocmiwait(struct tty_struct *tty, struct file *file,
    + unsigned int cmd, unsigned long arg)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    +
    + if (cmd == TIOCMIWAIT) {
    + DECLARE_WAITQUEUE(wait, current);
    + struct async_icount cnow;
    + struct async_icount cprev;
    +
    + cprev = port->tty_icount;
    + while (1) {
    + add_wait_queue(&port->tty_wait, &wait);
    + set_current_state(TASK_INTERRUPTIBLE);
    + schedule();
    + remove_wait_queue(&port->tty_wait, &wait);
    +
    + /* see if a signal woke us up */
    + if (signal_pending(current))
    + return -ERESTARTSYS;
    +
    + cnow = port->tty_icount;
    + if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
    + cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
    + return -EIO; /* no change => error */
    + if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
    + ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
    + ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
    + ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
    + return 0;
    +
    + cprev = cnow;
    + }
    +
    + }
    + return -ENOIOCTLCMD;
    +}
    +
    +static int ntty_ioctl_tiocgicount(struct tty_struct *tty, struct file *file,
    + unsigned int cmd, void __user *arg)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    +
    + if (cmd == TIOCGICOUNT) {
    + struct async_icount cnow = port->tty_icount;
    + struct serial_icounter_struct icount;
    +
    + icount.cts = cnow.cts;
    + icount.dsr = cnow.dsr;
    + icount.rng = cnow.rng;
    + icount.dcd = cnow.dcd;
    + icount.rx = cnow.rx;
    + icount.tx = cnow.tx;
    + icount.frame = cnow.frame;
    + icount.overrun = cnow.overrun;
    + icount.parity = cnow.parity;
    + icount.brk = cnow.brk;
    + icount.buf_overrun = cnow.buf_overrun;
    +
    + if (copy_to_user(arg, &icount, sizeof(icount)))
    + return -EFAULT;
    + return 0;
    + }
    + return -ENOIOCTLCMD;
    +}
    +
    +static int ntty_ioctl(struct tty_struct *tty, struct file *file,
    + unsigned int cmd, unsigned long arg)
    +{
    + struct port *port = tty->driver_data;
    + struct nozomi *dc = get_dc_by_tty(tty);
    + unsigned long flags;
    + int mask;
    + int rval = -ENOIOCTLCMD;
    +
    + DBG1("******** IOCTL, cmd: %d", cmd);
    +
    + switch (cmd) {
    + case TIOCMIWAIT:
    + rval = ntty_ioctl_tiocmiwait(tty, file, cmd, arg);
    + break;
    + case TIOCGICOUNT:
    + rval =
    + ntty_ioctl_tiocgicount(tty, file, cmd, (void __user *)arg);
    + break;
    + case TIOCMGET:
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + rval = ntty_tiocmget(tty, file);
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    + break;
    + case TIOCMSET:
    + rval = ntty_tiocmset(tty, file, arg, ~arg);
    + break;
    + case TIOCMBIC:
    + if (get_user(mask, (unsigned long __user *)arg))
    + return -EFAULT;
    +
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + if (mask & TIOCM_RTS)
    + set_rts(port->tty_index, 0);
    + if (mask & TIOCM_DTR)
    + set_dtr(port->tty_index, 0);
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    + rval = 0;
    + break;
    + case TIOCMBIS:
    + if (get_user(mask, (unsigned long __user *)arg))
    + return -EFAULT;
    +
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + if (mask & TIOCM_RTS)
    + set_rts(port->tty_index, 1);
    + if (mask & TIOCM_DTR)
    + set_dtr(port->tty_index, 1);
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    + rval = 0;
    + break;
    + default:
    + DBG1("ERR: 0x%08X, %d", cmd, cmd);
    + break;
    + };
    +
    + return rval;
    +}
    +
    +/*
    + * Called by the upper tty layer when tty buffers are ready
    + * to receive data again after a call to throttle.
    + */
    +static void ntty_unthrottle(struct tty_struct *tty)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    + struct nozomi *dc = get_dc_by_tty(tty);
    + unsigned long flags;
    +
    + DBG1("UNTHROTTLE");
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + enable_transmit_dl(port->tty_index % NTTY_TTY_MINORS, dc);
    + set_rts(port->tty_index, 1);
    +
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    +}
    +
    +/*
    + * Called by the upper tty layer when the tty buffers are almost full.
    + * The driver should stop send more data.
    + */
    +static void ntty_throttle(struct tty_struct *tty)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    + struct nozomi *dc = get_dc_by_tty(tty);
    + unsigned long flags;
    +
    + DBG1("THROTTLE");
    + spin_lock_irqsave(&dc->spin_mutex, flags);
    + set_rts(port->tty_index, 0);
    + spin_unlock_irqrestore(&dc->spin_mutex, flags);
    +}
    +
    +/* just to discard single character writes */
    +static void ntty_put_char(struct tty_struct *tty, unsigned char c)
    +{
    + /* FIXME !!! */
    + DBG2("PUT CHAR Function: %c", c);
    +}
    +
    +/* Returns number of chars in buffer, called by tty layer */
    +static s32 ntty_chars_in_buffer(struct tty_struct *tty)
    +{
    + struct port *port = (struct port *)tty->driver_data;
    + struct nozomi *dc = get_dc_by_tty(tty);
    + s32 rval;
    +
    + if (unlikely(!dc || !port)) {
    + rval = -ENODEV;
    + goto exit_in_buffer;
    + }
    +
    + if (unlikely(!port->tty_open_count)) {
    + dev_err(&dc->pdev->dev, "No tty open?\n");
    + rval = -ENODEV;
    + goto exit_in_buffer;
    + }
    +
    + rval = __kfifo_len(port->fifo_ul);
    +
    +exit_in_buffer:
    + return rval;
    +}
    +
    +static struct tty_operations tty_ops = {
    + .ioctl = ntty_ioctl,
    + .open = ntty_open,
    + .close = ntty_close,
    + .write = ntty_write,
    + .write_room = ntty_write_room,
    + .unthrottle = ntty_unthrottle,
    + .throttle = ntty_throttle,
    + .chars_in_buffer = ntty_chars_in_buffer,
    + .put_char = ntty_put_char,
    + .tiocmset = ntty_tiocmset,
    +};
    +
    +/* Initializes the tty */
    +static int ntty_tty_init(struct nozomi *dc)
    +{
    + struct tty_driver *td;
    + int rval;
    +
    + dc->tty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
    + if (!dc->tty_driver)
    + return -ENOMEM;
    + td = dc->tty_driver;
    + td->owner = THIS_MODULE;
    + td->driver_name = NOZOMI_NAME_TTY;
    + td->name = "noz";
    + td->major = NTTY_TTY_MAJOR;
    + td->type = TTY_DRIVER_TYPE_SERIAL;
    + td->subtype = SERIAL_TYPE_NORMAL;
    + td->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
    + td->init_termios = tty_std_termios;
    + td->init_termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
    + td->init_termios.c_ispeed = 115200;
    + td->init_termios.c_ospeed = 115200;
    + td->termios = dc->tty_termios;
    + td->termios_locked = dc->tty_termios_locked;
    + tty_set_operations(dc->tty_driver, &tty_ops);
    +
    + rval = tty_register_driver(td);
    + if (rval) {
    + dev_err(&dc->pdev->dev, "failed to register ntty tty driver\n");
    + return rval;
    + }
    +
    + dev_info(&dc->pdev->dev, DRIVER_DESC " " NOZOMI_NAME_TTY "\n");
    + return rval;
    +}
    +
    +/* Module initialization */
    +static struct pci_driver nozomi_driver = {
    + .name = NOZOMI_NAME,
    + .id_table = nozomi_pci_tbl,
    + .probe = nozomi_card_init,
    + .remove = __devexit_p(nozomi_card_exit),
    +};
    +
    +static __init int nozomi_init(void)
    +{
    + printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
    + return pci_register_driver(&nozomi_driver);
    +}
    +
    +static __exit void nozomi_exit(void)
    +{
    + printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
    + pci_unregister_driver(&nozomi_driver);
    +}
    +
    +module_init(nozomi_init);
    +module_exit(nozomi_exit);
    +
    +module_param(debug, int, S_IRUGO | S_IWUSR);
    +
    +MODULE_LICENSE("Dual BSD/GPL");
    +MODULE_DESCRIPTION(DRIVER_DESC);
    -
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      Last update: 2007-11-10 00:29    [W:0.272 / U:0.036 seconds]
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