From: thierry Date: Thu, 3 May 2007 13:13:51 +0000 (+0000) Subject: initial import X-Git-Tag: 2.21alpha_060917~2 X-Git-Url: http://git.onelab.eu/?p=nozomi.git;a=commitdiff_plain;h=03dd20706752e9fb20ad9464789ae45abde516db initial import --- 03dd20706752e9fb20ad9464789ae45abde516db diff --git a/CHANGELOG b/CHANGELOG new file mode 100755 index 0000000..adc01b1 --- /dev/null +++ b/CHANGELOG @@ -0,0 +1,32 @@ +/* + * Version 2.1 + * Changelog moved to head of nozomi.c + * 03-Jul-2006 : Paul Hardwick + * + * 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. + */ diff --git a/Makefile b/Makefile new file mode 100755 index 0000000..2a98557 --- /dev/null +++ b/Makefile @@ -0,0 +1,52 @@ +# if HW is PC_24 or PC_26 it compiles for kernel 2.4 resp 2.6 +HW=PC_26 + +#---------- FOR PC 2.6 kernel ----------------------------------- +ifeq ($(HW),PC_26) +ifneq ($(KERNELRELEASE),) +obj-m += nozomi.o +else +KDIR:=/lib/modules/$(shell uname -r)/build +INSTALLDIR:=/lib/modules/$(shell uname -r)/kernel/drivers/pci/hotplug +PWD := $(shell pwd) + +default: + @echo "Warning: Compiling for 2.6: $(FOR26)" + $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules +endif +endif +#---------- FOR PC 2.4 kernel ----------------------------------- +ifeq ($(HW),PC_24) +#CC = gcc-2.95 +CC = gcc-3.3 +KERNELDIR = -I/usr/src/kernel-headers-2.4.27-2-686/include/ +CFLAGS = -Wall $(KERNELDIR) -O3 -D__KERNEL__ -DMODULE -c -DPC_KERNEL_24 +PWD := $(shell pwd) + +default: + @echo "Warning: Compiling for 2.4: $(FOR26)" + $(CC) $(CFLAGS) nozomi.c -c + $(CC) $(CFLAGS) kfifo.c -c + ld -r -o noz.o nozomi.o kfifo.o +endif +#---------------------------------------------------------------- + +c: clean +clean: + $(RM) *.o *.ko *.mod.* .*.o.cmd .*.mod.* .*.ko.cmd + $(RM) .tmp_versions -rf +#---------------------------------------------------------------- +t: tags +tags: ctags +ctags: + ctags-exuberant -e *.c + +ser: ser.c + $(CC) ser.c -o ser + +i: install +install: + -modprobe -r nozomi + cp -f nozomi.ko $(INSTALLDIR) + depmod +#------------------------------------------------ \ No newline at end of file diff --git a/copying b/copying new file mode 100755 index 0000000..3912109 --- /dev/null +++ b/copying @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/kfifo.c b/kfifo.c new file mode 100755 index 0000000..d586368 --- /dev/null +++ b/kfifo.c @@ -0,0 +1,189 @@ +/* + * A simple kernel FIFO implementation. + * + * Copyright (C) 2004 Stelian Pop + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include +#include +#include +#include +#include "kfifo.h" + + +/** + * kfifo_init - allocates a new FIFO using a preallocated buffer + * @buffer: the preallocated buffer to be used. + * @size: the size of the internal buffer, this have to be a power of 2. + * @gfp_mask: get_free_pages mask, passed to kmalloc() + * @lock: the lock to be used to protect the fifo buffer + * + * Do NOT pass the kfifo to kfifo_free() after use ! Simply free the + * struct kfifo with kfree(). + */ +struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size, + unsigned int gfp_mask, void *lock) +{ + struct kfifo *fifo; + + /* size must be a power of 2 */ + BUG_ON(size & (size - 1)); + + fifo = kmalloc(sizeof(struct kfifo), gfp_mask); + if (!fifo) + return ERR_PTR(-ENOMEM); + + fifo->buffer = buffer; + fifo->size = size; + fifo->in = fifo->out = 0; + + return fifo; +} + +/** + * kfifo_alloc - allocates a new FIFO and its internal buffer + * @size: the size of the internal buffer to be allocated. + * @gfp_mask: get_free_pages mask, passed to kmalloc() + * @lock: the lock to be used to protect the fifo buffer + * + * The size will be rounded-up to a power of 2. + */ +struct kfifo *kfifo_alloc(unsigned int size, unsigned int gfp_mask, void *lock) +{ + unsigned char *buffer; + struct kfifo *ret; + + /* + * round up to the next power of 2, since our 'let the indices + * wrap' tachnique works only in this case. + */ + if (size & (size - 1)) { + BUG_ON(size > 0x80000000); + printk("Do not support no power of two!\n"); + //size = roundup_pow_of_two(size); + } + + buffer = kmalloc(size, gfp_mask); + if (!buffer) + return ERR_PTR(-ENOMEM); + + ret = kfifo_init(buffer, size, gfp_mask, lock); + + if (IS_ERR(ret)) + kfree(buffer); + + return ret; +} + +/** + * kfifo_free - frees the FIFO + * @fifo: the fifo to be freed. + */ +void kfifo_free(struct kfifo *fifo) +{ + kfree(fifo->buffer); + kfree(fifo); +} + +/** + * __kfifo_put - puts some data into the FIFO, no locking version + * @fifo: the fifo to be used. + * @buffer: the data to be added. + * @len: the length of the data to be added. + * + * This function copies at most 'len' bytes from the 'buffer' into + * the FIFO depending on the free space, and returns the number of + * bytes copied. + * + * Note that with only one concurrent reader and one concurrent + * writer, you don't need extra locking to use these functions. + */ +unsigned int __kfifo_put(struct kfifo *fifo, + unsigned char *buffer, unsigned int len) +{ + unsigned int l; + + len = min(len, fifo->size - fifo->in + fifo->out); + + /* first put the data starting from fifo->in to buffer end */ + l = min(len, fifo->size - (fifo->in & (fifo->size - 1))); + memcpy(fifo->buffer + (fifo->in & (fifo->size - 1)), buffer, l); + + /* then put the rest (if any) at the beginning of the buffer */ + memcpy(fifo->buffer, buffer + l, len - l); + + fifo->in += len; + + return len; +} + +/** __kfifio_put_user works like __kfifo_put, but copies data from + * user space. + */ + +unsigned int __kfifo_put_user(struct kfifo *fifo, + unsigned char *buffer, unsigned int len) +{ + unsigned int l; + + len = min(len, fifo->size - fifo->in + fifo->out); + + /* first put the data starting from fifo->in to buffer end */ + l = min(len, fifo->size - (fifo->in & (fifo->size - 1))); + copy_from_user(fifo->buffer + (fifo->in & (fifo->size - 1)), buffer, l); + + /* then put the rest (if any) at the beginning of the buffer */ + copy_from_user(fifo->buffer, buffer + l, len - l); + + fifo->in += len; + + return len; +} + + + +/** + * __kfifo_get - gets some data from the FIFO, no locking version + * @fifo: the fifo to be used. + * @buffer: where the data must be copied. + * @len: the size of the destination buffer. + * + * This function copies at most 'len' bytes from the FIFO into the + * 'buffer' and returns the number of copied bytes. + * + * Note that with only one concurrent reader and one concurrent + * writer, you don't need extra locking to use these functions. + */ +unsigned int __kfifo_get(struct kfifo *fifo, + unsigned char *buffer, unsigned int len) +{ + unsigned int l; + + len = min(len, fifo->in - fifo->out); + + /* first get the data from fifo->out until the end of the buffer */ + l = min(len, fifo->size - (fifo->out & (fifo->size - 1))); + memcpy(buffer, fifo->buffer + (fifo->out & (fifo->size - 1)), l); + + /* then get the rest (if any) from the beginning of the buffer */ + memcpy(buffer + l, fifo->buffer, len - l); + + fifo->out += len; + + return len; +} diff --git a/kfifo.h b/kfifo.h new file mode 100755 index 0000000..76a027f --- /dev/null +++ b/kfifo.h @@ -0,0 +1,67 @@ +/* + * A simple kernel FIFO implementation. + * + * Copyright (C) 2004 Stelian Pop + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ +#ifndef _LINUX_KFIFO_H +#define _LINUX_KFIFO_H + +#ifdef __KERNEL__ + +#include + +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0) +#warning "Don't include this header in 2.6, use header supplied with kernel" +#endif + +struct kfifo { + unsigned char *buffer; /* the buffer holding the data */ + unsigned int size; /* the size of the allocated buffer */ + unsigned int in; /* data is added at offset (in % size) */ + unsigned int out; /* data is extracted from off. (out % size) */ +}; + +extern struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size, unsigned int gfp_mask, void *lock); +extern struct kfifo *kfifo_alloc(unsigned int size, unsigned int gfp_mask, void *lock); +extern void kfifo_free(struct kfifo *fifo); +extern unsigned int __kfifo_put(struct kfifo *fifo, unsigned char *buffer, unsigned int len); +extern unsigned int __kfifo_put_user(struct kfifo *fifo, unsigned char *buffer, unsigned int len); +extern unsigned int __kfifo_get(struct kfifo *fifo, unsigned char *buffer, unsigned int len); + +/** + * __kfifo_reset - removes the entire FIFO contents, no locking version + * @fifo: the fifo to be emptied. + */ +static inline void __kfifo_reset(struct kfifo *fifo) +{ + fifo->in = fifo->out = 0; +} + +/** + * __kfifo_len - returns the number of bytes available in the FIFO, no locking version + * @fifo: the fifo to be used. + */ +static inline unsigned int __kfifo_len(struct kfifo *fifo) +{ + return fifo->in - fifo->out; +} + +#else +#warning "don't include kernel headers in userspace" +#endif /* __KERNEL__ */ +#endif diff --git a/nozomi.c b/nozomi.c new file mode 100644 index 0000000..af41bb9 --- /dev/null +++ b/nozomi.c @@ -0,0 +1,2415 @@ +/* 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 + +#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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef KERNEL_2_6 +#include +#else +#include "kfifo.h" +#endif +#include + +#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); diff --git a/readme b/readme new file mode 100755 index 0000000..10998c0 --- /dev/null +++ b/readme @@ -0,0 +1,26 @@ +To build this driver for your kernel, please check: + +For kernel 2.6 +--------------- +Check the Makefile and run 'make'. + +'make install' will copy the nozomi.ko module to the +/lib/modules/KERNEL_VERSION/kernel/drivers/pci/hotplug +directory and runs 'insmod' + +For kernel 2.4 +---------- +make HW=PC_24 + + + +Device Nodes +------------- +If this is the first time, you will need to run the following commands: +mknod /dev/noz0 c 241 0; mknod /dev/noz1 c 241 1; +mknod /dev/noz2 c 241 2; mknod /dev/noz3 c 241 3 + +If you have troubles: +--------------------- +1) Have proper kernel headers/source as your running kernel. +2) Make sure this variable in Makefile is correct KERNELDIR = -I/path/to/kernel diff --git a/todo b/todo new file mode 100755 index 0000000..2989752 --- /dev/null +++ b/todo @@ -0,0 +1,6 @@ +* When having a noz* open and rmmod module or removing card, + the driver core dumps. + +* Does not yet support multiple cards. + +* Add a helpful description.