+/* 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 2.21alpha
+* 17-Sept-2006 paul Hardwick
+* -Fixed unseen! bug in termio settings
+* -Removed more compile warnings
+* Version 2.2alpha
+* 10-Sept-2006 Paul Hardwick
+*
+* - A 2.6 kernel support version incorporating patches by GregKH
+* - changes include:
+* - module reference counting
+* - improved device exit code
+* - greater compliance to kernel guidelines
+*
+* - 2.4 kernels untested but included
+* - Still supports 2.6.14 for Ubunto users.
+* - Finally fixed compiler warnings
+*
+* 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.
+*/
+
+/* TODO
+*
+* See TODO file in this package
+*/
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,14)
+#define KERNEL_2_6_14
+#endif
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)
+#define KERNEL_2_6_18
+#endif
+
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+#define KERNEL_2_6
+#elif LINUX_VERSION_CODE > KERNEL_VERSION(2,4,0)
+#define KERNEL_2_4
+#endif
+
+#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/proc_fs.h>
+#include <linux/init.h>
+#ifdef KERNEL_2_6
+#include <linux/kfifo.h>
+#else
+#include "kfifo.h"
+#endif
+#include <asm/uaccess.h>
+
+#ifdef KERNEL_2_4
+
+#ifndef IRQ_NONE
+#define IRQ_NONE
+#endif
+
+#ifndef IRQ_HANDLED
+#define IRQ_HANDLED
+typedef void irqreturn_t;
+#endif
+
+#endif
+
+#ifndef CONFIG_PCI
+#error "This driver needs PCI support to be available"
+#endif
+
+#define VERSION_STRING DRIVER_DESC " 2.21alpha (build date: " __DATE__ " " __TIME__ ")"
+
+/* Macros definitions */
+
+/* Enable this to have a lot of debug printouts */
+/* #define NOZOMI_DEBUG */
+
+/* Default debug printout level */
+#define NOZOMI_DEBUG_LEVEL 0x1
+
+#define P_BUF_SIZE 128
+#define NFO( _err_flag_, args...) \
+ do{ \
+ char t_m_p_[P_BUF_SIZE]; \
+ snprintf(t_m_p_, sizeof(t_m_p_), ##args); \
+ printk( _err_flag_ "[%d] %s(): %s\n", __LINE__, __FUNCTION__, t_m_p_); \
+} while(0)
+
+#define ERR(args...) NFO( KERN_ERR, ##args)
+
+#define D1(args...) D_(0x01, ##args)
+#define D2(args...) D_(0x02, ##args)
+#define D3(args...) D_(0x04, ##args)
+#define D4(args...) D_(0x08, ##args)
+#define D5(args...) D_(0x10, ##args)
+#define D6(args...) D_(0x20, ##args)
+#define D7(args...) D_(0x40, ##args)
+#define D8(args...) D_(0x80, ##args)
+
+#ifdef NOZOMI_DEBUG
+#define D_(lvl, args...) D(lvl, ##args)
+ /* Do we need this settable at runtime? */
+static int nzdebug = NOZOMI_DEBUG_LEVEL;
+
+#define D(lvl, args...) do{if(lvl & nzdebug) NFO(KERN_DEBUG, ##args );}while(0)
+#define D_(lvl, args...) D(lvl, ##args)
+
+/* These printouts are always printed */
+
+#else
+static const int nzdebug = 0;
+#define D_(lvl, args...)
+#endif
+
+/* TODO: rewrite to optimize macros... */
+#define SET_FCR(value__) \
+ do { \
+ writew((value__), (dc->REG_FCR )); \
+} while(0)
+
+#define SET_IER(value__, mask__) \
+ do { \
+ dc->ier_last_written = (dc->ier_last_written & ~mask__) | (value__ & mask__ );\
+ writew( dc->ier_last_written, (dc->REG_IER));\
+} while(0)
+
+#define GET_IER(read_val__) \
+ do { \
+ (read_val__) = readw((dc->REG_IER));\
+} while(0)
+
+#define GET_IIR(read_val__) \
+ do { \
+ (read_val__) = readw( (dc->REG_IIR));\
+} while(0)
+
+#define GET_MEM(value__, addr__, length__) \
+ do { \
+/* read_mem32( (u32*) (value__), (u32) (addr__), (length__)); */\
+ read_mem32( (u32*) (value__), (addr__), (length__));\
+} while(0)
+
+#define GET_MEM_BUF(value__, addr__, length__) \
+ do { \
+/* read_mem32_buf( (u32*) (value__), (u32) (addr__), (length__)); */\
+ read_mem32_buf( (u32*) (value__), (addr__), (length__));\
+} while(0)
+
+#define SET_MEM(addr__, value__, length__) \
+ do { \
+ write_mem32( (addr__), (u32*) (value__), (length__));\
+} while(0)
+
+#define SET_MEM_BUF(addr__, value__, length__) \
+ do { \
+ write_mem32_buf( (addr__), (u32*) (value__), (length__));\
+} while(0)
+
+#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';\
+ }\
+ D1( "SENDING: '%s' (%d+n)", tbuf, len__);\
+ } else {\
+ D1( "SENDING: '%s' (%d)", tbuf, len__);\
+ }\
+} while(0)
+
+#define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+/* 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_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
+
+/* Our fake UART values */
+#define MCR_DTR 0x01
+#define MCR_RTS 0x02
+#define MCR_LOOP 0x04
+#define MSR_CTS 0x08
+#define MSR_CD 0x10
+#define MSR_RI 0x20
+#define MSR_DSR 0x40
+
+/* 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, /* Has 512 bytes downlink and uplink * 2 -> 2048 */
+ F32_8 = 8192, /* Has 3072 bytes downlink and 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 = 0x00,
+ CTRL_MDM = 0x01,
+ CTRL_DIAG = 0x02,
+ CTRL_APP1 = 0x03,
+ CTRL_APP2 = 0x04,
+ 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 */
+
+typedef struct {
+ 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)) toggles_t;
+
+/* Configuration table to read at startup of card */
+/* Is for now only needed during initialization phase */
+typedef struct {
+ u32 signature;
+ u16 product_information;
+ u16 version;
+ u8 pad3[3];
+ toggles_t 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)) config_table_t;
+
+/* This stores all control downlink flags */
+typedef struct {
+ u8 port;
+ unsigned reserved:4;
+ unsigned CTS:1;
+ unsigned RI:1;
+ unsigned DCD:1;
+ unsigned DSR:1;
+} __attribute__ ((packed)) ctrl_dl_t;
+
+/* This stores all control uplink flags */
+typedef struct {
+ u8 port;
+ unsigned reserved:6;
+ unsigned RTS:1;
+ unsigned DTR:1;
+} __attribute__ ((packed)) ctrl_ul_t;
+
+#else
+/* Little endian */
+
+/* This represents the toggle information */
+typedef struct {
+ 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)) toggles_t;
+
+/* Configuration table to read at startup of card */
+typedef struct {
+ u32 signature;
+ u16 version;
+ u16 product_information;
+ toggles_t 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)) config_table_t;
+
+/* This stores all control downlink flags */
+typedef struct {
+ unsigned DSR:1;
+ unsigned DCD:1;
+ unsigned RI:1;
+ unsigned CTS:1;
+ unsigned reserverd:4;
+ u8 port;
+} __attribute__ ((packed)) ctrl_dl_t;
+
+/* This stores all control uplink flags */
+typedef struct {
+ unsigned DTR:1;
+ unsigned RTS:1;
+ unsigned reserved:6;
+ u8 port;
+} __attribute__ ((packed)) ctrl_ul_t;
+#endif
+
+/* This holds all information that is needed regarding a port */
+struct port {
+ u8 update_flow_control;
+ ctrl_ul_t ctrl_ul;
+ ctrl_dl_t 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;
+ u8 tty_dont_flip;
+
+};
+
+/* Private data one for each card in the system */
+typedef struct {
+ void __iomem *base_addr;
+ u8 closing;
+
+ /* Pointers to registers */
+ void __iomem *REG_IIR;
+ void __iomem *REG_FCR;
+ void __iomem *REG_IER;
+
+ u16 ier_last_written;
+ enum card_type card_type;
+ config_table_t config_table; /* Configuration table */
+ struct pci_dev *pdev;
+ struct port port[NOZOMI_MAX_PORTS];
+ u8 *send_buf;
+
+ struct tty_driver *tty_driver;
+
+#ifdef KERNEL_2_4
+ struct tty_struct *tty_table[NTTY_TTY_MINORS];
+ struct tq_struct tty_flip_queue;
+ s32 tty_refcount;
+#endif
+#ifdef KERNEL_2_6
+ struct workqueue_struct *tty_flip_wq;
+ struct work_struct tty_flip_wq_struct;
+#endif
+
+ struct termios *tty_termios[NTTY_TTY_MINORS];
+ struct termios *tty_termios_locked[NTTY_TTY_MINORS];
+ spinlock_t spin_mutex;
+
+ u32 open_ttys;
+ struct proc_dir_entry *proc_entry;
+
+} dc_t;
+
+/* This is a data packet that is read or written to/from card */
+typedef struct {
+ u32 size; /* size is the length of the data buffer */
+ u8 *data;
+} __attribute__ ((packed)) buf_t;
+
+/* Function declarations */
+static int ntty_tty_init(dc_t * dc);
+static void tty_flip_queue_function(void *tmp_dc);
+
+/* Global variables */
+static struct pci_device_id nozomi_pci_tbl[] = {
+ {VENDOR1, DEVICE1},
+ {0,}
+};
+
+/* Used to store interrupt variables */
+typedef struct {
+ u16 read_iir; /* Holds current interrupt tokens */
+} irq_t;
+
+MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
+
+/* Representing the pci device of interest */
+static int cards_found;
+static dc_t *my_dev = NULL;
+static irq_t my_irq;
+
+static inline dc_t *get_dc_by_pdev(struct pci_dev *pdev)
+{
+ return my_dev;
+}
+
+static inline dc_t *get_dc_by_index(s32 index)
+{
+ return my_dev;
+}
+
+static inline s32 get_index(struct tty_struct *tty)
+{
+#ifdef KERNEL_2_6
+ return tty->index;
+#else
+ return MINOR(tty->device) - tty->driver.minor_start;
+#endif
+
+}
+
+static inline struct port *get_port_by_tty(struct tty_struct *tty)
+{
+ return &my_dev->port[get_index(tty)];
+}
+
+static inline dc_t *get_dc_by_tty(struct tty_struct *tty)
+{
+ return my_dev;
+}
+
+/* TODO: */
+/* -Optimize */
+/* -Rewrite cleaner */
+//static void read_mem32(u32 *buf, u32 mem_addr_start, u32 size_bytes) {
+static void read_mem32(u32 * buf, void __iomem * mem_addr_start, u32 size_bytes)
+{
+ u32 i = 0;
+ u32 *ptr = (__force u32 *) mem_addr_start;
+ u16 *buf16;
+
+ /* 2 bytes */
+ if (size_bytes == 2) {
+ buf16 = (u16 *) buf;
+ *buf16 = readw((void __iomem *)ptr);
+ return;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* Handle 2 bytes in the end */
+ buf16 = (u16 *) buf;
+ *(buf16) = readw((void __iomem *)ptr);
+ i += 2;
+ } else {
+ /* Read 4 bytes */
+ *(buf) = readl((void __iomem *)ptr);
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+}
+
+/* TODO: */
+/* - Rewrite cleaner */
+/* - merge with read_mem32() */
+//static void read_mem32_buf(u32 *buf, u32 mem_addr_start, u32 size_bytes) {
+static void read_mem32_buf(u32 * buf, void __iomem * mem_addr_start,
+ u32 size_bytes)
+{
+#ifdef __ARMEB__
+ u32 i = 0;
+ u32 *ptr = (u32 *) mem_addr_start;
+ u16 *buf16;
+
+ /* 2 bytes */
+ if (size_bytes == 2) {
+ buf16 = (u16 *) buf;
+ *buf16 = __le16_to_cpu(readw(ptr));
+ return;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* Handle 2 bytes in the end */
+ buf16 = (u16 *) buf;
+ *(buf16) = __le16_to_cpu(readw(ptr));
+ i += 2;
+ } else {
+ /* Read 4 bytes */
+ *(buf) = __le32_to_cpu(readl(ptr));
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+#else
+ read_mem32(buf, mem_addr_start, size_bytes);
+#endif
+}
+
+/* TODO: */
+/* -Optimize */
+/* -Rewrite cleaner */
+//static u32 write_mem32(u32 mem_addr_start, u32 *buf, u32 size_bytes) {
+static u32 write_mem32(void __iomem * mem_addr_start, u32 * buf, u32 size_bytes)
+{
+ u32 i = 0;
+ u32 *ptr = (__force u32 *) mem_addr_start;
+ u16 *buf16;
+
+ /* 2 bytes */
+ if (size_bytes == 2) {
+ buf16 = (u16 *) buf;
+ writew(*buf16, (void __iomem *)ptr);
+ return 2;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* 2 bytes */
+ buf16 = (u16 *) buf;
+ writew(*buf16, (void __iomem *)ptr);
+ i += 2;
+ } else {
+ /* 4 bytes */
+ writel(*buf, (void __iomem *)ptr);
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+ return size_bytes;
+}
+
+/* Todo: */
+/* - Merge with write_mem32() */
+//static u32 write_mem32_buf(u32 mem_addr_start, u32 *buf, u32 size_bytes) {
+static u32 write_mem32_buf(void __iomem * mem_addr_start, u32 * buf,
+ u32 size_bytes)
+{
+#ifdef __ARMEB__
+ u32 i = 0;
+ u32 *ptr = (u32 *) mem_addr_start;
+ u16 *buf16;
+
+ /* 2 bytes */
+ if (size_bytes == 2) {
+ buf16 = (u16 *) buf;
+ writew(__le16_to_cpu(*buf16), ptr);
+ return 2;
+ }
+
+ while (i < size_bytes) {
+ if (size_bytes - i == 2) {
+ /* 2 bytes */
+ buf16 = (u16 *) buf;
+ writew(__le16_to_cpu(*buf16), ptr);
+ i += 2;
+ } else {
+ /* 4 bytes */
+ writel(__cpu_to_le32(*buf), ptr);
+ i += 4;
+ }
+ buf++;
+ ptr++;
+ }
+ return size_bytes;
+#else
+ return write_mem32(mem_addr_start, buf, size_bytes);
+#endif
+}
+
+/* Setup pointers to different channels and also setup buffer sizes. */
+static void setup_memory(dc_t * 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. */
+ 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;
+
+ /* Modem Port ul configuration */
+ dc->port[PORT_MDM].ul_addr[CH_A] = (offset =
+ dc->base_addr +
+ dc->config_table.ul_start);
+ 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;
+// offset = dc->config_table.ul_start;
+}
+
+/* Dump config table under initalization phase */
+#ifdef NOZOMI_DEBUG
+static void dump_table(dc_t * dc)
+{
+ D3("signature: 0x%08X", dc->config_table.signature);
+ D3("version: 0x%04X", dc->config_table.version);
+ D3("product_information: 0x%04X", dc->config_table.product_information);
+ D3("toggle enabled: %d", dc->config_table.toggle.enabled);
+ D3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
+ D3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
+ D3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
+
+ D3("dl_start: 0x%04X", dc->config_table.dl_start);
+ D3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
+ dc->config_table.dl_mdm_len1);
+ D3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
+ dc->config_table.dl_mdm_len2);
+ D3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
+ dc->config_table.dl_diag_len1);
+ D3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
+ dc->config_table.dl_diag_len2);
+ D3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
+ dc->config_table.dl_app1_len);
+ D3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
+ dc->config_table.dl_app2_len);
+ D3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
+ dc->config_table.dl_ctrl_len);
+ D3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
+ dc->config_table.ul_start);
+ D3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
+ dc->config_table.ul_mdm_len1);
+ D3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
+ dc->config_table.ul_mdm_len2);
+ D3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
+ dc->config_table.ul_diag_len);
+ D3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
+ dc->config_table.ul_app1_len);
+ D3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
+ dc->config_table.ul_app2_len);
+ D3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
+ dc->config_table.ul_ctrl_len);
+}
+#endif
+
+/* Read configuration table from card under intalization phase */
+/* Returns 1 if ok, else 0 */
+static int nozomi_read_config_table(dc_t * dc)
+{
+
+ GET_MEM(&dc->config_table, dc->base_addr + 0, sizeof(config_table_t));
+
+ /* D1( "0x%08X == 0x%08X ", dc->config_table.signature, CONFIG_MAGIC); */
+
+ 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;
+ D1("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;
+ D1("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);
+
+#ifdef NOZOMI_DEBUG
+ dump_table(dc);
+#endif
+ 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(ctrl_dl_t));
+ memset(&dc->port[i].ctrl_ul, 0, sizeof(ctrl_ul_t));
+ }
+
+ /* Enable control channel */
+ SET_IER(CTRL_DL, CTRL_DL);
+
+ 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;
+ D1("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 */
+ SET_MEM(dc->port[PORT_MDM].ul_addr[CH_A], &offset, 4);
+ SET_MEM(dc->port[PORT_MDM].ul_addr[CH_B], &offset, 4);
+
+ SET_FCR(MDM_UL | DIAG_DL | MDM_DL);
+
+ D1("First phase done");
+ }
+
+ return 1;
+}
+
+/* Enable uplink interrupts */
+static void enable_transmit_ul(enum port_type port, dc_t * dc)
+{
+
+ switch (port) {
+ case PORT_MDM:
+ SET_IER(MDM_UL, MDM_UL);
+ break;
+ case PORT_DIAG:
+ SET_IER(DIAG_UL, DIAG_UL);
+ break;
+ case PORT_APP1:
+ SET_IER(APP1_UL, APP1_UL);
+ break;
+ case PORT_APP2:
+ SET_IER(APP2_UL, APP2_UL);
+ break;
+ case PORT_CTRL:
+ SET_IER(CTRL_UL, CTRL_UL);
+ break;
+ default:
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ break;
+ };
+}
+
+/* Disable uplink interrupts */
+static void disable_transmit_ul(enum port_type port, dc_t * dc)
+{
+ switch (port) {
+ case PORT_MDM:
+ SET_IER(0, MDM_UL);
+ break;
+ case PORT_DIAG:
+ SET_IER(0, DIAG_UL);
+ break;
+ case PORT_APP1:
+ SET_IER(0, APP1_UL);
+ break;
+ case PORT_APP2:
+ SET_IER(0, APP2_UL);
+ break;
+ case PORT_CTRL:
+ SET_IER(0, CTRL_UL);
+ break;
+ default:
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ break;
+ };
+}
+
+/* Enable downlink interrupts */
+static void enable_transmit_dl(enum port_type port, dc_t * dc)
+{
+ switch (port) {
+ case PORT_MDM:
+ SET_IER(MDM_DL, MDM_DL);
+ break;
+ case PORT_DIAG:
+ SET_IER(DIAG_DL, DIAG_DL);
+ break;
+ case PORT_APP1:
+ SET_IER(APP1_DL, APP1_DL);
+ break;
+ case PORT_APP2:
+ SET_IER(APP2_DL, APP2_DL);
+ break;
+ case PORT_CTRL:
+ SET_IER(CTRL_DL, CTRL_DL);
+ break;
+ default:
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ break;
+ };
+}
+
+/* Disable downlink interrupts */
+static void disable_transmit_dl(enum port_type port, dc_t * dc)
+{
+ switch (port) {
+ case PORT_MDM:
+ SET_IER(0, MDM_DL);
+ break;
+ case PORT_DIAG:
+ SET_IER(0, DIAG_DL);
+ break;
+ case PORT_APP1:
+ SET_IER(0, APP1_DL);
+ break;
+ case PORT_APP2:
+ SET_IER(0, APP2_DL);
+ break;
+ case PORT_CTRL:
+ SET_IER(0, CTRL_DL);
+ break;
+ default:
+ dev_err(&dc->pdev->dev, "Called with wrong port?\n");
+ break;
+ };
+}
+
+/* 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, dc_t * 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;
+
+ if (index >= NTTY_TTY_MINORS) {
+ dev_err(&dc->pdev->dev, "Called with wrong index?\n");
+ return 0;
+ }
+
+ /* 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) {
+ D4("No more data to send, disable link:");
+ return 0;
+ }
+
+ port->tx_data += size;
+
+ /* DUMP(buf, size); */
+
+ /* Write length + data */
+ SET_MEM(addr, &size, 4);
+ SET_MEM_BUF(addr + 4, dc->send_buf, size);
+
+ if (port->tty) {
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
+ && tty->ldisc.write_wakeup) {
+ tty->ldisc.write_wakeup(tty);
+ }
+ wake_up_interruptible(&tty->write_wait);
+ }
+
+ return 1;
+}
+
+/* If all data has been read, return 1, else 0 */
+static int receive_data(enum port_type index, dc_t * dc)
+{
+ u8 buf[RECEIVE_BUF_MAX] = { 0 };
+ int size;
+ u32 offset = 4;
+ struct port *port = &dc->port[index];
+ u8 toggle = port->toggle_dl;
+ void __iomem *addr = port->dl_addr[toggle];
+ struct tty_struct *tty = port->tty;
+ int i;
+
+ if (!tty) {
+ D1("tty not open for port: %d?", index);
+ return 1;
+ }
+
+ GET_MEM(&size, addr, 4);
+ /* D1( "%d bytes port: %d", size, index); */
+
+ if (test_bit(TTY_THROTTLED, &tty->flags)) {
+ D1("No room in tty, don't read data, don't ack interrupt, disable interrupt");
+
+ /* disable interrupt in downlink... */
+ disable_transmit_dl(index, dc);
+#ifdef KERNEL_2_4
+ schedule_task(&dc->tty_flip_queue);
+#endif
+ return 0;
+ }
+
+ if (size == 0) {
+ dev_err(&dc->pdev->dev, "size == 0?\n");
+ return 1;
+ }
+
+ while (size > 0) {
+ GET_MEM_BUF(buf, addr + offset, 4);
+
+ i = 0;
+ while (i < 4 && size > 0) {
+#ifdef KERNEL_2_6_14
+ if (tty_buffer_request_room(tty, 1) < 1)
+#else
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) //pre 2.6.14 kernels*/
+#endif
+ {
+ tty_flip_buffer_push(tty);
+ }
+ tty_insert_flip_char(tty, buf[i], TTY_NORMAL);
+ port->rx_data++;
+ i++;
+ size--;
+ }
+
+ offset += 4;
+ }
+
+ tty_flip_buffer_push(tty);
+
+ return 1;
+}
+
+/* Debug for interrupts */
+#ifdef NOZOMI_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 ") : 0;
+ interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL2 ") : 0;
+
+ interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_UL1 ") : 0;
+ interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX, "MDM_UL2 ") : 0;
+
+ interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX, "DIAG_DL1 ") : 0;
+ interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX, "DIAG_DL2 ") : 0;
+
+ interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX, "DIAG_UL ") : 0;
+
+ interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX, "APP1_DL ") : 0;
+ interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX, "APP2_DL ") : 0;
+
+ interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX, "APP1_UL ") : 0;
+ interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX, "APP2_UL ") : 0;
+
+ interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX, "CTRL_DL ") : 0;
+ interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX, "CTRL_UL ") : 0;
+
+ interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX, "RESET ") : 0;
+
+ return buf;
+}
+#endif
+
+/* Receive flow control */
+/* Return 1 - If ok, else 0 */
+static int receive_flow_control(dc_t * dc, irq_t * m)
+{
+ enum port_type port = PORT_MDM;
+ ctrl_dl_t ctrl_dl;
+ ctrl_dl_t old_ctrl;
+ u16 enable_ier = 0;
+
+ GET_MEM(&ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
+
+ switch (ctrl_dl.port) {
+ case CTRL_CMD:
+ D1("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;
+ };
+
+ D1("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) {
+ D1("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)) {
+ D1("Enable interrupt (0x%04X) on port: %d", enable_ier,
+ port);
+ D1("Data in buffer [%d], enable transmit! ",
+ __kfifo_len(dc->port[port].fifo_ul));
+ enable_transmit_ul(port, dc);
+ } else {
+ D1("No data in buffer...");
+ }
+ }
+
+ if (*(u16 *) & old_ctrl == *(u16 *) & ctrl_dl) {
+ D1(" 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++;
+ }
+ D1("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;
+}
+
+/* TODO: */
+/* - return enum ctrl_port_type */
+static u8 port2ctrl(enum port_type port, dc_t * 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 -1;
+}
+
+/* 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(dc_t * 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;
+ /* D1( "sending flow control 0x%04X for port %d, %d", (u16) *ctrl, i, dc->port[i].ctrl_ul.port ); */
+ SET_MEM(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(dc_t * dc, irq_t * m, enum port_type port,
+ u8 * toggle, u16 mask1, u16 mask2)
+{
+
+ if (*toggle == 0 && m->read_iir & mask1) {
+ if (receive_data(port, dc)) {
+ SET_FCR(mask1);
+ *toggle = !(*toggle);
+ }
+
+ if (m->read_iir & mask2) {
+ if (receive_data(port, dc)) {
+ SET_FCR(mask2);
+ *toggle = !(*toggle);
+ }
+ }
+ } else if (*toggle == 1 && m->read_iir & mask2) {
+ if (receive_data(port, dc)) {
+ SET_FCR(mask2);
+ *toggle = !(*toggle);
+ }
+
+ if (m->read_iir & mask1) {
+ if (receive_data(port, dc)) {
+ SET_FCR(mask1);
+ *toggle = !(*toggle);
+ }
+ }
+ } else {
+ ERR("port out of sync!, toggle:%d", *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(dc_t * dc, irq_t * m, enum port_type port)
+{
+
+ u8 *toggle = &(dc->port[port].toggle_ul);
+
+ if (*toggle == 0 && m->read_iir & MDM_UL1) {
+ SET_IER(0, MDM_UL);
+ if (send_data(port, dc)) {
+ SET_FCR(MDM_UL1);
+ SET_IER(MDM_UL, MDM_UL);
+ *toggle = !*toggle;
+ }
+
+ if (m->read_iir & MDM_UL2) {
+ SET_IER(0, MDM_UL);
+ if (send_data(port, dc)) {
+ SET_FCR(MDM_UL2);
+ SET_IER(MDM_UL, MDM_UL);
+ *toggle = !*toggle;
+ }
+ }
+
+ } else if (*toggle == 1 && m->read_iir & MDM_UL2) {
+ SET_IER(0, MDM_UL);
+ if (send_data(port, dc)) {
+ SET_FCR(MDM_UL2);
+ SET_IER(MDM_UL, MDM_UL);
+ *toggle = !*toggle;
+ }
+
+ if (m->read_iir & MDM_UL1) {
+ SET_IER(0, MDM_UL);
+ if (send_data(port, dc)) {
+ SET_FCR(MDM_UL1);
+ SET_IER(MDM_UL, MDM_UL);
+ *toggle = !*toggle;
+ }
+ }
+ } else {
+ SET_FCR(m->read_iir & MDM_UL);
+ ERR("port out of sync!");
+ return 0;
+ }
+ return 1;
+}
+
+static irqreturn_t interrupt_handler(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ dc_t *dc = NULL;
+ irq_t *m = &my_irq;
+
+ if (my_dev && my_dev->pdev != dev_id) {
+ return IRQ_NONE;
+ }
+
+ if (!(dc = get_dc_by_pdev(dev_id))) {
+ ERR("Could not find device context from pci_dev: %Xu",
+ (u32) dev_id);
+ return IRQ_NONE;
+ }
+
+ GET_IIR(m->read_iir);
+
+ /* Just handle interrupt enabled in IER (by masking with dc->ier_last_written) */
+ m->read_iir &= dc->ier_last_written;
+
+ if (m->read_iir == 0) {
+ return IRQ_NONE;
+ }
+
+ if (dc == NULL) {
+ ERR("ERROR!!");
+ return IRQ_NONE;
+ }
+
+ spin_lock(&dc->spin_mutex);
+
+ D4("%s irq:0x%04X, prev:0x%04X", interrupt2str(m->read_iir),
+ m->read_iir, dc->ier_last_written);
+
+ if (m->read_iir & RESET) {
+ if (!nozomi_read_config_table(dc)) {
+ SET_IER(0, 0xFFFF);
+ ERR("ERR: Could not read status from card, we should disable interface");
+ } else {
+ SET_FCR(RESET);
+ }
+ goto exit_handler; /* No more useful info if this was the reset interrupt. */
+ }
+ if (m->read_iir & CTRL_UL) {
+ D1("CTRL_UL");
+ SET_IER(0, CTRL_UL);
+ if (send_flow_control(dc)) {
+ SET_FCR(CTRL_UL);
+ SET_IER(CTRL_UL, CTRL_UL);
+ }
+ }
+ if (m->read_iir & CTRL_DL) {
+ receive_flow_control(dc, m);
+ SET_FCR(CTRL_DL);
+ }
+ if (m->read_iir & MDM_DL) {
+ if (!
+ (handle_data_dl
+ (dc, m, PORT_MDM, &(dc->port[PORT_MDM].toggle_dl), MDM_DL1,
+ MDM_DL2))) {
+ ERR("MDM_DL out of sync!");
+ goto exit_handler;
+ }
+ }
+ if (m->read_iir & MDM_UL) {
+ if (!handle_data_ul(dc, m, PORT_MDM)) {
+ ERR("MDM_UL out of sync!");
+ 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))) {
+ ERR("DIAG_DL out of sync!");
+ goto exit_handler;
+ }
+ }
+ if (m->read_iir & DIAG_UL) {
+ SET_IER(0, DIAG_UL);
+ if (send_data(PORT_DIAG, dc)) {
+ SET_FCR(DIAG_UL);
+ SET_IER(DIAG_UL, DIAG_UL);
+ }
+ }
+ if (m->read_iir & APP1_DL) {
+ if (receive_data(PORT_APP1, dc)) {
+ SET_FCR(APP1_DL);
+ }
+ }
+ if (m->read_iir & APP1_UL) {
+ SET_IER(0, APP1_UL);
+ if (send_data(PORT_APP1, dc)) {
+ SET_FCR(APP1_UL);
+ SET_IER(APP1_UL, APP1_UL);
+ }
+ }
+ if (m->read_iir & APP2_DL) {
+ if (receive_data(PORT_APP2, dc)) {
+ SET_FCR(APP2_DL);
+ }
+ }
+ if (m->read_iir & APP2_UL) {
+ SET_IER(0, APP2_UL);
+ if (send_data(PORT_APP2, dc)) {
+ SET_FCR(APP2_UL);
+ SET_IER(APP2_UL, APP2_UL);
+ }
+ }
+
+ exit_handler:
+ spin_unlock(&dc->spin_mutex);
+ return IRQ_HANDLED;
+}
+
+/* Request a shared IRQ from system */
+static int nozomi_setup_interrupt(struct pci_dev *pdev)
+{
+
+ int rval = 0;
+
+ if ((rval =
+ request_irq(pdev->irq, &interrupt_handler, SA_SHIRQ, NOZOMI_NAME,
+ pdev))) {
+ ERR("Cannot open because IRQ %d is already in use.", pdev->irq);
+ return rval;
+ }
+
+ return rval;
+}
+
+static void nozomi_get_card_type(dc_t * 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(dc_t * 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->ier_last_written = 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 = dc->port[i].tx_data = 0;
+ dc->port[i].tty_dont_flip = 0;
+ }
+}
+
+static void tty_flip_queue_function(void *tmp_dc)
+{
+ dc_t *dc = (dc_t *) tmp_dc;
+ int i;
+ unsigned long flags;
+
+ /* Enable interrupt for that port */
+ for (i = 0; i < MAX_PORT; i++) {
+ if (dc->port[i].tty_dont_flip) {
+ D6("Enable for port: %d", i);
+ dc->port[i].tty_dont_flip = 0;
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ enable_transmit_dl(dc->port[i].tty_index, dc);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ }
+ }
+}
+
+static int read_proc_card_type(char *buf, char **start, off_t offset, int len)
+{
+ dc_t *dc = get_dc_by_index(0);
+ len = 0;
+
+ len += sprintf(buf + len, "%d\n", dc->card_type);
+ return len;
+}
+
+static int read_proc_open_ttys(char *buf, char **start, off_t offset, int len)
+{
+ dc_t *dc = get_dc_by_index(0);
+ len = 0;
+
+ len += sprintf(buf + len, "%d\n", dc->open_ttys);
+ return len;
+}
+
+static int read_proc_version(char *buf, char **start, off_t offset, int len)
+{
+ len = 0;
+
+ len += sprintf(buf + len, "%s\n", VERSION_STRING);
+ return len;
+}
+
+static int read_proc_rtx(char *buf, char **start, off_t offset, int len)
+{
+ dc_t *dc = get_dc_by_index(0);
+ int i;
+
+ len = 0;
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ len +=
+ sprintf(buf + len, "noz%d rx: %d, tx: %d\n", i,
+ dc->port[i].rx_data, dc->port[i].tx_data);
+ }
+ return len;
+}
+
+static void make_proc_dirs(void)
+{
+ dc_t *dc = get_dc_by_index(0);
+ dc->proc_entry = proc_mkdir("nozomi", &proc_root);
+
+ /* Register the read_proc */
+ if (!create_proc_info_entry
+ ("card_type", 0, dc->proc_entry, read_proc_card_type)) {
+ ERR("ERROR: failed to register read_procmem");
+ }
+ if (!create_proc_info_entry
+ ("open_ttys", 0, dc->proc_entry, read_proc_open_ttys)) {
+ ERR("ERROR: failed to register read_procmem");
+ }
+ if (!create_proc_info_entry("rtx", 0, dc->proc_entry, read_proc_rtx)) {
+ ERR("ERROR: failed to register read_procmem");
+ }
+ if (!create_proc_info_entry
+ ("version", 0, dc->proc_entry, read_proc_version)) {
+ ERR("ERROR: failed to register read_procmem");
+ }
+}
+
+static void remove_proc_dirs(void)
+{
+ dc_t *dc = get_dc_by_index(0);
+
+ remove_proc_entry("card_type", dc->proc_entry);
+ remove_proc_entry("open_ttys", dc->proc_entry);
+ remove_proc_entry("rtx", dc->proc_entry);
+ remove_proc_entry("version", dc->proc_entry);
+ remove_proc_entry("nozomi", &proc_root);
+}
+
+/* Allocate memory for one device */
+static int __devinit nozomi_card_init(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int ret = -EIO;
+ dc_t *dc = NULL;
+
+ cards_found++;
+ dev_info(&pdev->dev, "Init, cards_found: %d\n", cards_found);
+
+ if (!(my_dev = kmalloc(sizeof(dc_t), GFP_KERNEL))) {
+ D1("Could not allocate memory");
+ return -EIO;
+ }
+
+ memset(my_dev, 0, sizeof(dc_t));
+
+ if (cards_found > 1) {
+ dev_err(&pdev->dev, "This driver only supports 1 device\n");
+ return -ENODEV;
+ }
+
+ my_dev->pdev = pdev;
+ dc = my_dev;
+
+ /* Find out what card type it is */
+ nozomi_get_card_type(dc);
+
+ if (pci_enable_device(dc->pdev)) {
+ dev_err(&pdev->dev, "Not possible to enable PCI Device\n");
+ return -ENODEV;
+ }
+ dc->base_addr = (void *)pci_resource_start(dc->pdev, 0);
+ if (dc->base_addr == 0x0000) {
+ dev_err(&pdev->dev, "No I/O-Address for card detected\n");
+ ret = -ENODEV;
+ goto err_disable_device;
+ }
+ dc->base_addr = (void *)ioremap((int)dc->base_addr, dc->card_type);
+ if (!dc->base_addr) {
+ dev_err(&pdev->dev, "No I/O-Address for card detected\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 */
+ SET_IER(0, 0xFFFF);
+
+ /* Setup interrupt handler */
+ if (nozomi_setup_interrupt(dc->pdev)) {
+ ret = -EIO;
+ goto err_disable_regions;
+ }
+
+ D1("base_addr: 0x%08X", dc->base_addr);
+#ifdef KERNEL_2_4
+ dc->tty_flip_queue.list.next = NULL;
+ dc->tty_flip_queue.list.prev = NULL;
+ dc->tty_flip_queue.sync = 0;
+ dc->tty_flip_queue.data = dc;
+ dc->tty_flip_queue.routine = tty_flip_queue_function;
+#endif
+#ifdef KERNEL_2_6
+ if (!(dc->tty_flip_wq = create_singlethread_workqueue(NOZOMI_NAME))) {
+ ERR("Could not create workqueue?");
+ BUG_ON(!dc->tty_flip_wq);
+ return -ENOMEM;
+ }
+ INIT_WORK(&dc->tty_flip_wq_struct, tty_flip_queue_function, dc);
+#endif
+ spin_lock_init(&dc->spin_mutex);
+ make_proc_dirs();
+ ntty_tty_init(dc);
+ /* Enable RESET interrupt. */
+ SET_IER(RESET, 0xFFFF);
+ 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(my_dev);
+ return ret;
+}
+
+static void tty_do_close(dc_t * dc, struct port *port)
+{
+
+ unsigned long flags;
+
+ if (down_interruptible(&port->tty_sem)) {
+ return;
+ }
+ if (port->tty_open_count) {
+ dc->open_ttys--;
+ port->tty_open_count--;
+ #ifdef KERNEL_2_4
+ MOD_DEC_USE_COUNT;
+ #endif
+ if (port->tty_open_count == 0) {
+ D1("close: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ SET_IER(0, port->token_dl);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+ }
+ }
+ up(&port->tty_sem);
+}
+
+static void __devexit tty_exit(void)
+{
+ dc_t *dc = my_dev;
+ int i;
+
+ D1(" ");
+ for (i = 0; i < NTTY_TTY_MINORS; i++) {
+ while (dc->port[i].tty_open_count)
+ tty_do_close(dc, &dc->port[i]);
+ dc->port[i].tty = NULL;
+ }
+#ifdef KERNEL_2_6
+ for (i = 0; i < NTTY_TTY_MINORS; ++i){
+ D1("Unregistering device");
+ tty_unregister_device(dc->tty_driver, i);
+ }
+#endif
+ D1("Unregistering driver");
+ tty_unregister_driver(dc->tty_driver);
+ put_tty_driver(dc->tty_driver);
+}
+
+/* Deallocate memory for one device */
+static void __devexit nozomi_card_exit(struct pci_dev *pdev)
+{
+ int i;
+ ctrl_ul_t ctrl;
+ dc_t *dc = get_dc_by_pdev(pdev);
+
+ /* Disable all interrupts */
+ SET_IER(0, 0xFFFF);
+
+ /* 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;
+ D1("sending flow control 0x%04X", *((u16 *) & ctrl));
+
+ /* Setup dc->reg addresses to we can use defines here */
+ nozomi_setup_private_data(dc);
+ SET_MEM(dc->port[PORT_CTRL].ul_addr[0], (u32 *) & ctrl, 2);
+ SET_FCR(CTRL_UL); /* push the token to the card. */
+
+ D1("pci_release_regions");
+ pci_release_regions(pdev);
+
+ if (dc->base_addr)
+ iounmap(dc->base_addr);
+
+ D1("pci_disable_device");
+ pci_disable_device(pdev);
+
+ free_irq(pdev->irq, pdev);
+
+ for (i = PORT_MDM; i < MAX_PORT; i++) {
+ kfree(dc->port[i].fifo_ul);
+ }
+
+ kfree(dc->send_buf);
+
+ tty_exit();
+
+ remove_proc_dirs();
+
+#ifdef KERNEL_2_6
+ destroy_workqueue(dc->tty_flip_wq);
+#endif
+ if (my_dev) {
+ kfree(my_dev);
+ }
+
+ cards_found--;
+}
+
+static void set_rts(int index, int rts)
+{
+ dc_t *dc = get_dc_by_index(index);
+ dc->port[index].ctrl_ul.RTS = rts;
+ dc->port[index].update_flow_control = 1;
+ enable_transmit_ul(PORT_CTRL, dc);
+}
+
+static void set_dtr(int index, int dtr)
+{
+ dc_t *dc = get_dc_by_index(index);
+ D1("SETTING DTR index: %d, dtr: %d", index, dtr);
+ dc->port[index].ctrl_ul.DTR = dtr;
+ dc->port[index].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)
+{
+
+ s32 index = get_index(tty);
+ struct port *port = get_port_by_tty(tty);
+ dc_t *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ if (down_interruptible(&port->tty_sem)) {
+ return -ERESTARTSYS;
+ }
+
+ tty->low_latency = 1;
+ tty->driver_data = port;
+ port->tty = tty;
+ port->tty_index = index;
+ port->tty_open_count++;
+ dc->open_ttys++;
+#ifdef KERNEL_2_4
+ MOD_INC_USE_COUNT;
+#endif
+ /* Enable interrupt downlink for channel */
+ if (port->tty_open_count == 1) {
+ port->rx_data = port->tx_data = 0;
+ D1("open: %d", port->token_dl);
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ SET_IER(port->token_dl, port->token_dl);
+ 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)
+{
+ dc_t *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. */
+#ifdef KERNEL_2_6
+static int ntty_write(struct tty_struct *tty, const u8 *buffer,
+ int count)
+{
+#else
+static s32 ntty_write(struct tty_struct *tty, s32 from_user, const u8 * buffer,
+ s32 count)
+{
+#endif
+ int rval = -EINVAL;
+ dc_t *dc = get_dc_by_tty(tty);
+ struct port *port = (struct port *)tty->driver_data;
+ unsigned long flags;
+
+ /* D1( "WRITEx: %d, index = %d", count, index); */
+
+ if (!port) {
+ return -ENODEV;
+ }
+
+ if (down_trylock(&port->tty_sem)) { // must test lock as tty layer wraps calls to this function with BKL
+ ERR("Would have deadlocked - return ERESTARTSYS");
+ return -ERESTARTSYS;
+ }
+
+ if (!port->tty_open_count) {
+ D1(" ");
+ goto exit;
+ }
+#ifdef KERNEL_2_4
+ if (from_user) {
+ rval =
+ __kfifo_put_user(port->fifo_ul, (unsigned char *)buffer,
+ count);
+ } else {
+ rval =
+ __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
+ }
+#else
+ rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
+#endif
+
+ /* notify card */
+ if (dc == NULL) {
+ D1("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) {
+ D4("Enable interrupt");
+ enable_transmit_ul(port->tty_index, dc);
+ } else {
+ ERR("CTS not active on modem port?");
+ }
+ } else {
+ enable_transmit_ul(port->tty_index, 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;
+ if (!port) {
+ return 0;
+ }
+ if (down_trylock(&port->tty_sem)) {
+ return 0;
+ }
+ if (port->tty_open_count) {
+ room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
+ }
+ up(&port->tty_sem);
+ return room;
+}
+
+/* Sets termios flags, called by the tty layer. */
+static void ntty_set_termios(struct tty_struct *tty,
+ struct termios *old_termios)
+{
+ unsigned int cflag;
+
+ cflag = tty->termios->c_cflag;
+
+ if (old_termios) {
+ if ((cflag == old_termios->c_cflag) &&
+ (RELEVANT_IFLAG(tty->termios->c_iflag) ==
+ RELEVANT_IFLAG(old_termios->c_iflag))) {
+ D1(" - nothing to change...");
+ goto exit_termios;
+ }
+ }
+
+ /* get the byte size */
+ switch (cflag & CSIZE) {
+ case CS5:
+ D1(" - data bits = 5");
+ break;
+ case CS6:
+ D1(" - data bits = 6");
+ break;
+ case CS7:
+ D1(" - data bits = 7");
+ break;
+ default:
+ case CS8:
+ D1(" - data bits = 8");
+ break;
+ }
+
+ /* determine the parity */
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ D1(" - parity = odd");
+ } else {
+ D1(" - parity = even");
+ }
+ } else {
+ D1(" - parity = none");
+ }
+
+ /* figure out the stop bits requested */
+ if (cflag & CSTOPB) {
+ D1(" - stop bits = 2");
+ } else {
+ D1(" - stop bits = 1");
+ }
+
+ /* figure out the hardware flow control settings */
+ if (cflag & CRTSCTS) {
+ D1(" - RTS/CTS is enabled");
+ } else {
+ D1(" - RTS/CTS is disabled");
+ }
+
+ /* determine software flow control */
+ /* if we are implementing XON/XOFF, set the start and
+ * stop character in the device */
+ if (I_IXOFF(tty) || I_IXON(tty)) {
+#ifdef NOZOMI_DEBUG
+ unsigned char stop_char = STOP_CHAR(tty);
+ unsigned char start_char = START_CHAR(tty);
+#endif
+ /* if we are implementing INBOUND XON/XOFF */
+ if (I_IXOFF(tty)) {
+ D1(" - INBOUND XON/XOFF is enabled, "
+ "XON = %2x, XOFF = %2x", start_char, stop_char);
+ } else {
+ D1(" - INBOUND XON/XOFF is disabled");
+ }
+
+ /* if we are implementing OUTBOUND XON/XOFF */
+ if (I_IXON(tty)) {
+ D1(" - OUTBOUND XON/XOFF is enabled, "
+ "XON = %2x, XOFF = %2x", start_char, stop_char);
+ } else {
+ D1(" - OUTBOUND XON/XOFF is disabled");
+ }
+ }
+
+ exit_termios:
+ return;
+}
+
+/* Gets io control parameters */
+static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct port *port = tty->driver_data;
+ ctrl_dl_t *ctrl_dl = &port->ctrl_dl;
+ ctrl_ul_t *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, u32 arg)
+{
+ struct port *port = (struct port *)tty->driver_data;
+
+ set_rts(port->tty_index, (arg & TIOCM_RTS) ? 1 : 0);
+ set_dtr(port->tty_index, (arg & TIOCM_DTR) ? 1 : 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;
+ dc_t *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+ int mask;
+ int rval = -ENOIOCTLCMD;
+
+ D1("******** IOCTL, cmd: %d", cmd);
+
+ switch (cmd) {
+ case TCGETS:
+ D1("IOCTL TCGETS ...");
+ rval = -ENOIOCTLCMD;
+ break;
+ case TCSETS:
+ D1("IOCTL TCSETS ...");
+ rval = -ENOIOCTLCMD;
+ break;
+ 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);
+ 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;
+ case TCFLSH:
+ D1("IOCTL TCFLSH ...");
+ rval = -ENOIOCTLCMD;
+ break;
+
+ default:
+ D1("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;
+ dc_t *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ D1("UNTHROTTLE");
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ enable_transmit_dl(port->tty_index, 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;
+ dc_t *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ D1("THROTTLE");
+ spin_lock_irqsave(&dc->spin_mutex, flags);
+ set_rts(port->tty_index, 0);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
+}
+
+static void ntty_put_char(struct tty_struct *tty, unsigned char c)
+{
+ D2("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;
+ s32 rval;
+
+ if (!port) {
+ rval = -ENODEV;
+ goto exit_in_buffer;
+ }
+
+ if (!port->tty_open_count) {
+ ERR("No tty open?");
+ 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,
+ .set_termios = ntty_set_termios,
+ .chars_in_buffer = ntty_chars_in_buffer,
+ .put_char = ntty_put_char,
+};
+
+/* Initializes the tty */
+static int ntty_tty_init(dc_t * dc)
+{
+ struct tty_driver *td;
+ int rval;
+ int i;
+
+ dc->tty_driver = alloc_tty_driver(NTTY_TTY_MINORS);
+ 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;
+#ifdef KERNEL_2_6_18
+ td->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+#else
+ td->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+#endif
+ td->init_termios = tty_std_termios;
+ td->init_termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
+
+#ifdef KERNEL_2_4
+ td->table = dc->tty_table;
+ td->refcount = &dc->tty_refcount;
+#endif
+
+ 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;
+ }
+
+ 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;
+#ifdef KERNEL_2_6
+ tty_register_device(td, i, &dc->pdev->dev);
+#endif
+ }
+
+ 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)
+{
+ int rval = 0;
+
+ rval = pci_module_init(&nozomi_driver);
+ printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
+ return rval;
+}
+
+static __exit void nozomi_exit(void)
+{
+ printk(KERN_INFO "Unloading %s", DRIVER_DESC);
+ pci_unregister_driver(&nozomi_driver);
+}
+
+module_init(nozomi_init);
+module_exit(nozomi_exit);
+
+#ifdef NOZOMI_DEBUG
+MODULE_PARM(nzdebug, "i");
+#endif
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
git://git.onelab.eu / nozomi.git / commitdiff