From foo@baz Tue Apr 9 12:12:43 2002 Date: Thu, 24 Aug 2006 01:25:46 -0700 To: Greg KH From: Greg Kroah-Hartman Subject: Add nozomi driver to the tree This is a driver to control the cardbus wireless data card that works on 3g networks. It still needs a lot of cleanup, but is getting there... at least it builds with no warnings on i386 now... Thanks to Arnaud Patard for help with bugfixing. Thanks to Alan Cox for a lot of tty fixes. Thanks to Satyam Sharma for fixing buildbreakage. Thanks to Frank Seidel for a lot of bugfixes and rewriting to make it a sane Linux driver Signed-off-by: Greg Kroah-Hartman Signed-off-by: Frank Seidel --- drivers/char/Kconfig | 10 drivers/char/Makefile | 1 drivers/char/nozomi.c | 2348 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 2359 insertions(+) --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -373,6 +373,16 @@ config ISTALLION To compile this driver as a module, choose M here: the module will be called istallion. +config NOZOMI + tristate "HSDPA Broadband Wireless Data Card - Globe Trotter" + depends on PCI && EXPERIMENTAL + help + If you have a HSDPA driver Broadband Wireless Data Card - + Globe Trotter PCMCIA card, say Y here. + + To compile this driver as a module, choose M here, the module + will be called nozomi. + config A2232 tristate "Commodore A2232 serial support (EXPERIMENTAL)" depends on EXPERIMENTAL && ZORRO && BROKEN_ON_SMP --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -26,6 +26,7 @@ obj-$(CONFIG_SERIAL167) += serial167.o obj-$(CONFIG_CYCLADES) += cyclades.o obj-$(CONFIG_STALLION) += stallion.o obj-$(CONFIG_ISTALLION) += istallion.o +obj-$(CONFIG_NOZOMI) += nozomi.o obj-$(CONFIG_DIGIEPCA) += epca.o obj-$(CONFIG_SPECIALIX) += specialix.o obj-$(CONFIG_MOXA_INTELLIO) += moxa.o --- /dev/null +++ b/drivers/char/nozomi.c @@ -0,0 +1,2348 @@ +/* + * 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 2.1b + * 07-August-2007 Frank Seidel + * - Minor cleanups + * - theoretical multicard support + * + * Version 2.1 + * 03-July-2006 Paul Hardwick + * + * - Stability Improvements. Incorporated spinlock wraps patch. + * - Updated for newer 2.6.14+ kernels (tty_buffer_request_room) + * - using __devexit macro for tty + * + * + * Version 2.0 + * 08-feb-2006 15:34:10:Ulf + * + * -Fixed issue when not waking up line disipine layer, could probably result + * in better uplink performance for 2.4. + * + * -Fixed issue with big endian during initalization, now proper toggle flags + * are handled between preloader and maincode. + * + * -Fixed flow control issue. + * + * -Added support for setting DTR. + * + * -For 2.4 kernels, removing temporary buffer that's not needed. + * + * -Reading CTS only for modem port (only port that supports it). + * + * -Return 0 in write_room instead of netative value, it's not handled in + * upper layer. + * + * -------------------------------------------------------------------------- + * Version 1.0 + * + * First version of driver, only tested with card of type F32_2. + * Works fine with 2.4 and 2.6 kernels. + * Driver also support big endian architecture. + */ + +/* Enable this to have a lot of debug printouts */ +#define DEBUG + + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + + +#define VERSION_STRING DRIVER_DESC " 2.1b (build date: " \ + __DATE__ " " __TIME__ ")" + +/* Macros definitions */ + +/* Default debug printout level */ +#define NOZOMI_DEBUG_LEVEL 0x00 + +#define P_BUF_SIZE 128 +#define NFO(_err_flag_, args...) \ +do { \ + char tmp[P_BUF_SIZE]; \ + snprintf(tmp, sizeof(tmp), ##args); \ + printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \ + __FUNCTION__, tmp); \ +} while (0) + +#define DBG1(args...) D_(0x01, ##args) +#define DBG2(args...) D_(0x02, ##args) +#define DBG3(args...) D_(0x04, ##args) +#define DBG4(args...) D_(0x08, ##args) +#define DBG5(args...) D_(0x10, ##args) +#define DBG6(args...) D_(0x20, ##args) +#define DBG7(args...) D_(0x40, ##args) +#define DBG8(args...) D_(0x80, ##args) + +#ifdef DEBUG +/* Do we need this settable at runtime? */ +static int debug = NOZOMI_DEBUG_LEVEL; + +#define D(lvl, args...) do {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \ + while (0) +#define D_(lvl, args...) D(lvl, ##args) + +/* These printouts are always printed */ + +#else +static int debug; +#define D_(lvl, args...) +#endif + +/* TODO: rewrite to optimize macros... */ + +#define TMP_BUF_MAX 256 + +#define DUMP(buf__,len__) \ + do { \ + char tbuf[TMP_BUF_MAX] = {0};\ + if (len__ > 1) {\ + snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\ + if (tbuf[len__-2] == '\r') {\ + tbuf[len__-2] = 'r';\ + } \ + DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\ + } else {\ + DBG1("SENDING: '%s' (%d)", tbuf, len__);\ + } \ +} while (0) + +/* Defines */ +#define NOZOMI_NAME "nozomi" +#define NOZOMI_NAME_TTY "nozomi_tty" +#define DRIVER_DESC "Nozomi driver" + +#define NTTY_TTY_MAJOR 241 +#define NTTY_TTY_MINORS MAX_PORT +#define NTTY_FIFO_BUFFER_SIZE 8192 + +/* Must be power of 2 */ +#define FIFO_BUFFER_SIZE_UL 8192 + +/* Size of tmp send buffer to card */ +#define SEND_BUF_MAX 1024 +#define RECEIVE_BUF_MAX 4 + + +/* Define all types of vendors and devices to support */ +#define VENDOR1 0x1931 /* Vendor Option */ +#define DEVICE1 0x000c /* HSDPA card */ + +#define R_IIR 0x0000 /* Interrupt Identity Register */ +#define R_FCR 0x0000 /* Flow Control Register */ +#define R_IER 0x0004 /* Interrupt Enable Register */ + +#define CONFIG_MAGIC 0xEFEFFEFE +#define TOGGLE_VALID 0x0000 + +/* Definition of interrupt tokens */ +#define MDM_DL1 0x0001 +#define MDM_UL1 0x0002 +#define MDM_DL2 0x0004 +#define MDM_UL2 0x0008 +#define DIAG_DL1 0x0010 +#define DIAG_DL2 0x0020 +#define DIAG_UL 0x0040 +#define APP1_DL 0x0080 +#define APP1_UL 0x0100 +#define APP2_DL 0x0200 +#define APP2_UL 0x0400 +#define CTRL_DL 0x0800 +#define CTRL_UL 0x1000 +#define RESET 0x8000 + +#define MDM_DL (MDM_DL1 | MDM_DL2) +#define MDM_UL (MDM_UL1 | MDM_UL2) +#define DIAG_DL (DIAG_DL1 | DIAG_DL2) + +/* modem signal definition */ +#define CTRL_DSR 0x0001 +#define CTRL_DCD 0x0002 +#define CTRL_RI 0x0004 +#define CTRL_CTS 0x0008 + +#define CTRL_DTR 0x0001 +#define CTRL_RTS 0x0002 + +#define MAX_PORT 4 +#define NOZOMI_MAX_PORTS 5 + +/* Type definitions */ + +/* + * There are two types of nozomi cards, + * one with 2048 memory and with 8192 memory + */ +enum card_type { + F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */ + F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */ +}; + +/* Two different toggle channels exist */ +enum channel_type { + CH_A = 0, + CH_B = 1, +}; + +/* Port definition for the card regarding flow control */ +enum ctrl_port_type { + CTRL_CMD = 0, + CTRL_MDM = 1, + CTRL_DIAG = 2, + CTRL_APP1 = 3, + CTRL_APP2 = 4, + CTRL_ERROR = -1, +}; + +/* Ports that the nozomi has */ +enum port_type { + PORT_MDM = 0, + PORT_DIAG = 1, + PORT_APP1 = 2, + PORT_APP2 = 3, + PORT_CTRL = 4, + PORT_ERROR = -1, +}; + +#ifdef __ARMEB__ +/* Big endian */ + +struct toggles { + unsigned enabled:5; /* + * Toggle fields are valid if enabled is 0, + * else A-channels must always be used. + */ + unsigned diag_dl:1; + unsigned mdm_dl:1; + unsigned mdm_ul:1; +} __attribute__ ((packed)); + +/* Configuration table to read at startup of card */ +/* Is for now only needed during initialization phase */ +struct config_table { + u32 signature; + u16 product_information; + u16 version; + u8 pad3[3]; + struct toggles toggle; + u8 pad1[4]; + u16 dl_mdm_len1; /* + * If this is 64, it can hold + * 60 bytes + 4 that is length field + */ + u16 dl_start; + + u16 dl_diag_len1; + u16 dl_mdm_len2; /* + * If this is 64, it can hold + * 60 bytes + 4 that is length field + */ + u16 dl_app1_len; + + u16 dl_diag_len2; + u16 dl_ctrl_len; + u16 dl_app2_len; + u8 pad2[16]; + u16 ul_mdm_len1; + u16 ul_start; + u16 ul_diag_len; + u16 ul_mdm_len2; + u16 ul_app1_len; + u16 ul_app2_len; + u16 ul_ctrl_len; +} __attribute__ ((packed)); + +/* This stores all control downlink flags */ +struct ctrl_dl { + u8 port; + unsigned reserved:4; + unsigned CTS:1; + unsigned RI:1; + unsigned DCD:1; + unsigned DSR:1; +} __attribute__ ((packed)); + +/* This stores all control uplink flags */ +struct ctrl_ul { + u8 port; + unsigned reserved:6; + unsigned RTS:1; + unsigned DTR:1; +} __attribute__ ((packed)); + +#else +/* Little endian */ + +/* This represents the toggle information */ +struct toggles { + unsigned mdm_ul:1; + unsigned mdm_dl:1; + unsigned diag_dl:1; + unsigned enabled:5; /* + * Toggle fields are valid if enabled is 0, + * else A-channels must always be used. + */ +} __attribute__ ((packed)); + +/* Configuration table to read at startup of card */ +struct config_table { + u32 signature; + u16 version; + u16 product_information; + struct toggles toggle; + u8 pad1[7]; + u16 dl_start; + u16 dl_mdm_len1; /* + * If this is 64, it can hold + * 60 bytes + 4 that is length field + */ + u16 dl_mdm_len2; + u16 dl_diag_len1; + u16 dl_diag_len2; + u16 dl_app1_len; + u16 dl_app2_len; + u16 dl_ctrl_len; + u8 pad2[16]; + u16 ul_start; + u16 ul_mdm_len2; + u16 ul_mdm_len1; + u16 ul_diag_len; + u16 ul_app1_len; + u16 ul_app2_len; + u16 ul_ctrl_len; +} __attribute__ ((packed)); + +/* This stores all control downlink flags */ +struct ctrl_dl { + unsigned DSR:1; + unsigned DCD:1; + unsigned RI:1; + unsigned CTS:1; + unsigned reserverd:4; + u8 port; +} __attribute__ ((packed)); + +/* This stores all control uplink flags */ +struct ctrl_ul { + unsigned DTR:1; + unsigned RTS:1; + unsigned reserved:6; + u8 port; +} __attribute__ ((packed)); +#endif + +/* This holds all information that is needed regarding a port */ +struct port { + u8 update_flow_control; + struct ctrl_ul ctrl_ul; + struct ctrl_dl ctrl_dl; + struct kfifo *fifo_ul; + void __iomem *dl_addr[2]; + u32 dl_size[2]; + u8 toggle_dl; + void __iomem *ul_addr[2]; + u32 ul_size[2]; + u8 toggle_ul; + u16 token_dl; + + struct tty_struct *tty; + int tty_open_count; + struct semaphore tty_sem; + wait_queue_head_t tty_wait; + struct async_icount tty_icount; + int tty_index; + u32 rx_data, tx_data; + u8 tty_dont_flip; + +}; + +/* Private data one for each card in the system */ +struct nozomi { + void __iomem *base_addr; + u8 closing; + + /* Pointers to registers */ + void __iomem *reg_iir; + void __iomem *reg_fcr; + void __iomem *reg_ier; + + u16 last_ier; + enum card_type card_type; + struct config_table config_table; /* Configuration table */ + struct pci_dev *pdev; + struct port port[NOZOMI_MAX_PORTS]; + u8 *send_buf; + + struct tty_driver *tty_driver; + + struct workqueue_struct *tty_flip_wq; + struct work_struct tty_flip_wq_struct; + + struct ktermios *tty_termios[NTTY_TTY_MINORS]; + struct ktermios *tty_termios_locked[NTTY_TTY_MINORS]; + spinlock_t spin_mutex; /* secures access to registers and tty */ + + u32 open_ttys; +}; + +/* This is a data packet that is read or written to/from card */ +struct buffer { + u32 size; /* size is the length of the data buffer */ + u8 *data; +} __attribute__ ((packed)); + +/* Function declarations */ +static int ntty_tty_init(struct nozomi *dc); + +/* Global variables */ +static struct pci_device_id nozomi_pci_tbl[] = { + {PCI_DEVICE(VENDOR1, DEVICE1)}, + {}, +}; + +MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl); + +/* Used to store interrupt variables */ +struct irq { + u16 read_iir; /* Holds current interrupt tokens */ +}; + +/* Representing the pci device of interest */ +struct nozomi_devices { + struct list_head list; + struct nozomi *my_dev; + struct irq my_irq; + int index_start; +}; +static atomic_t cards_found = ATOMIC_INIT(0); +static LIST_HEAD(my_devices); + +/* + * find card by tty_index + */ +static struct nozomi *get_dc_by_index(s32 index) +{ + struct list_head *p; + struct nozomi_devices *curdev; + int devidx; + + if (likely(atomic_read(&cards_found) == 1)) { + curdev = list_first_entry(&my_devices, + struct nozomi_devices, list); + return curdev->my_dev; + } else { + devidx = index - (index % NTTY_TTY_MINORS); + + list_for_each(p, &my_devices) { + curdev = list_entry(p, struct nozomi_devices, list); + if (curdev->index_start == devidx) + return curdev->my_dev; + } + } + + printk(KERN_ALERT "Fatal error: could not find device" \ + " for tty-index %d\n", index); + + return NULL; +} + +static struct port *get_port_by_tty(const struct tty_struct *tty) +{ + struct nozomi *ndev = get_dc_by_index(tty->index); + return ndev ? &ndev->port[tty->index] : NULL; +} + +static struct nozomi *get_dc_by_tty(const struct tty_struct *tty) +{ + return get_dc_by_index(tty->index); +} + +/* + * TODO: + * -Optimize + * -Rewrite cleaner + */ +static void read_mem32(u32 *buf, const void __iomem *mem_addr_start, + u32 size_bytes) +{ + u32 i = 0; +#ifdef __ARMEB__ + const u32 *ptr = (u32 *) mem_addr_start; +#else + const u32 *ptr = (__force u32 *) mem_addr_start; +#endif + u16 *buf16; + + if (unlikely(!ptr || !buf)) + goto out; + + /* shortcut for extremely often used cases */ + switch (size_bytes) { + case 2: /* 2 bytes */ + buf16 = (u16 *) buf; +#ifdef __ARMEB__ + *buf16 = __le16_to_cpu(readw(ptr)); +#else + *buf16 = readw((void __iomem *)ptr); +#endif + goto out; + break; + case 4: /* 4 bytes */ +#ifdef __ARMEB__ + *(buf) = __le32_to_cpu(readl(ptr)); +#else + *(buf) = readl((void __iomem *)ptr); +#endif + goto out; + break; + } + + while (i < size_bytes) { + if (size_bytes - i == 2) { + /* Handle 2 bytes in the end */ + buf16 = (u16 *) buf; +#ifdef __ARMEB__ + *(buf16) = __le16_to_cpu(readw(ptr)); +#else + *(buf16) = readw((void __iomem *)ptr); +#endif + i += 2; + } else { + /* Read 4 bytes */ +#ifdef __ARMEB__ + *(buf) = __le32_to_cpu(readl(ptr)); +#else + *(buf) = readl((void __iomem *)ptr); +#endif + i += 4; + } + buf++; + ptr++; + } +out: + return; +} + +/* + * TODO: + * -Optimize + * -Rewrite cleaner + */ +static u32 write_mem32(void __iomem *mem_addr_start, u32 *buf, + u32 size_bytes) +{ + u32 i = 0; +#ifdef __ARMEB__ + u32 *ptr = (u32 *) mem_addr_start; +#else + u32 *ptr = (__force u32 *) mem_addr_start; +#endif + u16 *buf16; + + if (unlikely(!ptr || !buf)) + return 0; + + /* shortcut for extremely often used cases */ + switch (size_bytes) { + case 2: /* 2 bytes */ + buf16 = (u16 *) buf; +#ifdef __ARMEB__ + writew(__le16_to_cpu(*buf16), ptr); +#else + writew(*buf16, (void __iomem *)ptr); +#endif + return 2; + break; + case 4: /* 4 bytes */ +#ifdef __ARMEB__ + writel(__cpu_to_le32(*buf), ptr); +#else + writel(*buf, (void __iomem *)ptr); +#endif + return 4; + break; + } + + while (i < size_bytes) { + if (size_bytes - i == 2) { + /* 2 bytes */ + buf16 = (u16 *) buf; +#ifdef __ARMEB__ + writew(__le16_to_cpu(*buf16), ptr); +#else + writew(*buf16, (void __iomem *)ptr); +#endif + i += 2; + } else { + /* 4 bytes */ +#ifdef __ARMEB__ + writel(__cpu_to_le32(*buf), ptr); +#else + writel(*buf, (void __iomem *)ptr); +#endif + i += 4; + } + buf++; + ptr++; + } + return i; +} + +/* Setup pointers to different channels and also setup buffer sizes. */ +static void setup_memory(struct nozomi *dc) +{ + void __iomem *offset = dc->base_addr + dc->config_table.dl_start; + /* The length reported is including the length field of 4 bytes, + * hence subtract with 4. + */ + const u16 buff_offset = 4; + + /* Modem port dl configuration */ + dc->port[PORT_MDM].dl_addr[CH_A] = offset; + dc->port[PORT_MDM].dl_addr[CH_B] = + (offset += dc->config_table.dl_mdm_len1); + dc->port[PORT_MDM].dl_size[CH_A] = + dc->config_table.dl_mdm_len1 - buff_offset; + dc->port[PORT_MDM].dl_size[CH_B] = + dc->config_table.dl_mdm_len2 - buff_offset; + + /* Diag port dl configuration */ + dc->port[PORT_DIAG].dl_addr[CH_A] = + (offset += dc->config_table.dl_mdm_len2); + dc->port[PORT_DIAG].dl_size[CH_A] = + dc->config_table.dl_diag_len1 - buff_offset; + dc->port[PORT_DIAG].dl_addr[CH_B] = + (offset += dc->config_table.dl_diag_len1); + dc->port[PORT_DIAG].dl_size[CH_B] = + dc->config_table.dl_diag_len2 - buff_offset; + + /* App1 port dl configuration */ + dc->port[PORT_APP1].dl_addr[CH_A] = + (offset += dc->config_table.dl_diag_len2); + dc->port[PORT_APP1].dl_size[CH_A] = + dc->config_table.dl_app1_len - buff_offset; + + /* App2 port dl configuration */ + dc->port[PORT_APP2].dl_addr[CH_A] = + (offset += dc->config_table.dl_app1_len); + dc->port[PORT_APP2].dl_size[CH_A] = + dc->config_table.dl_app2_len - buff_offset; + + /* Ctrl dl configuration */ + dc->port[PORT_CTRL].dl_addr[CH_A] = + (offset += dc->config_table.dl_app2_len); + dc->port[PORT_CTRL].dl_size[CH_A] = + dc->config_table.dl_ctrl_len - buff_offset; + + offset = dc->base_addr + dc->config_table.ul_start; + + /* Modem Port ul configuration */ + dc->port[PORT_MDM].ul_addr[CH_A] = offset; + dc->port[PORT_MDM].ul_size[CH_A] = + dc->config_table.ul_mdm_len1 - buff_offset; + dc->port[PORT_MDM].ul_addr[CH_B] = + (offset += dc->config_table.ul_mdm_len1); + dc->port[PORT_MDM].ul_size[CH_B] = + dc->config_table.ul_mdm_len2 - buff_offset; + + /* Diag port ul configuration */ + dc->port[PORT_DIAG].ul_addr[CH_A] = + (offset += dc->config_table.ul_mdm_len2); + dc->port[PORT_DIAG].ul_size[CH_A] = + dc->config_table.ul_diag_len - buff_offset; + + /* App1 port ul configuration */ + dc->port[PORT_APP1].ul_addr[CH_A] = + (offset += dc->config_table.ul_diag_len); + dc->port[PORT_APP1].ul_size[CH_A] = + dc->config_table.ul_app1_len - buff_offset; + + /* App2 port ul configuration */ + dc->port[PORT_APP2].ul_addr[CH_A] = + (offset += dc->config_table.ul_app1_len); + dc->port[PORT_APP2].ul_size[CH_A] = + dc->config_table.ul_app2_len - buff_offset; + + /* Ctrl ul configuration */ + dc->port[PORT_CTRL].ul_addr[CH_A] = + (offset += dc->config_table.ul_app2_len); + dc->port[PORT_CTRL].ul_size[CH_A] = + dc->config_table.ul_ctrl_len - buff_offset; +} + +/* Dump config table under initalization phase */ +#ifdef DEBUG +static void dump_table(const struct nozomi *dc) +{ + DBG3("signature: 0x%08X", dc->config_table.signature); + DBG3("version: 0x%04X", dc->config_table.version); + DBG3("product_information: 0x%04X", \ + dc->config_table.product_information); + DBG3("toggle enabled: %d", dc->config_table.toggle.enabled); + DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul); + DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl); + DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl); + + DBG3("dl_start: 0x%04X", dc->config_table.dl_start); + DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1, + dc->config_table.dl_mdm_len1); + DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2, + dc->config_table.dl_mdm_len2); + DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1, + dc->config_table.dl_diag_len1); + DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2, + dc->config_table.dl_diag_len2); + DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len, + dc->config_table.dl_app1_len); + DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len, + dc->config_table.dl_app2_len); + DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len, + dc->config_table.dl_ctrl_len); + DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start, + dc->config_table.ul_start); + DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1, + dc->config_table.ul_mdm_len1); + DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2, + dc->config_table.ul_mdm_len2); + DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len, + dc->config_table.ul_diag_len); + DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len, + dc->config_table.ul_app1_len); + DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len, + dc->config_table.ul_app2_len); + DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len, + dc->config_table.ul_ctrl_len); +} +#else +static __inline__ void dump_table(const struct nozomi *dc) { } +#endif + +/* + * Read configuration table from card under intalization phase + * Returns 1 if ok, else 0 + */ +static int nozomi_read_config_table(struct nozomi *dc) +{ + read_mem32((u32 *) &dc->config_table, dc->base_addr + 0, + sizeof(struct config_table)); + + if (dc->config_table.signature != CONFIG_MAGIC) { + dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n", + dc->config_table.signature, CONFIG_MAGIC); + return 0; + } + + if ((dc->config_table.version == 0) + || (dc->config_table.toggle.enabled == TOGGLE_VALID)) { + int i; + DBG1("Second phase, configuring card"); + + setup_memory(dc); + + dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul; + dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl; + dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl; + DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d", + dc->port[PORT_MDM].toggle_ul, + dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl); + + dump_table(dc); + + for (i = PORT_MDM; i < MAX_PORT; i++) { + dc->port[i].fifo_ul = + kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL); + memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl)); + memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul)); + } + + /* Enable control channel */ + dc->last_ier = (dc->last_ier & ~CTRL_DL) | CTRL_DL; + writew(dc->last_ier, dc->reg_ier); + + dev_info(&dc->pdev->dev, "Initialization OK!\n"); + return 1; + } + + if ((dc->config_table.version > 0) + && (dc->config_table.toggle.enabled != TOGGLE_VALID)) { + u32 offset = 0; + DBG1("First phase: pushing upload buffers, clearing download"); + + dev_info(&dc->pdev->dev, "Version of card: %d\n", + dc->config_table.version); + + /* Here we should disable all I/O over F32. */ + setup_memory(dc); + + /* + * We should send ALL channel pair tokens back along + * with reset token + */ + + /* push upload modem buffers */ + write_mem32(dc->port[PORT_MDM].ul_addr[CH_A], + (u32 *) &offset, 4); + write_mem32(dc->port[PORT_MDM].ul_addr[CH_B], + (u32 *) &offset, 4); + + writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr); + + DBG1("First phase done"); + } + + return 1; +} + +/* Enable uplink interrupts */ +static void enable_transmit_ul(enum port_type port, struct nozomi *dc) +{ + switch (port) { + case PORT_MDM: + dc->last_ier = (dc->last_ier & ~MDM_UL) | MDM_UL; + break; + case PORT_DIAG: + dc->last_ier = (dc->last_ier & ~DIAG_UL) | DIAG_UL; + break; + case PORT_APP1: + dc->last_ier = (dc->last_ier & ~APP1_UL) | APP1_UL; + break; + case PORT_APP2: + dc->last_ier = (dc->last_ier & ~APP2_UL) | APP2_UL; + break; + case PORT_CTRL: + dc->last_ier = (dc->last_ier & ~CTRL_UL) | CTRL_UL; + break; + default: + dev_err(&dc->pdev->dev, "Called with wrong port?\n"); + return; + break; + }; + + writew(dc->last_ier, dc->reg_ier); +} + +/* Disable uplink interrupts */ +static void disable_transmit_ul(enum port_type port, struct nozomi *dc) +{ + switch (port) { + case PORT_MDM: + dc->last_ier &= ~MDM_UL; + break; + case PORT_DIAG: + dc->last_ier &= ~DIAG_UL; + break; + case PORT_APP1: + dc->last_ier &= ~APP1_UL; + break; + case PORT_APP2: + dc->last_ier &= ~APP2_UL; + break; + case PORT_CTRL: + dc->last_ier &= ~CTRL_UL; + break; + default: + dev_err(&dc->pdev->dev, "Called with wrong port?\n"); + return; + break; + }; + + writew(dc->last_ier, dc->reg_ier); +} + +/* Enable downlink interrupts */ +static void enable_transmit_dl(enum port_type port, struct nozomi *dc) +{ + switch (port) { + case PORT_MDM: + dc->last_ier = (dc->last_ier & ~MDM_DL) | MDM_DL; + break; + case PORT_DIAG: + dc->last_ier = (dc->last_ier & ~DIAG_DL) | DIAG_DL; + break; + case PORT_APP1: + dc->last_ier = (dc->last_ier & ~APP1_DL) | APP1_DL; + break; + case PORT_APP2: + dc->last_ier = (dc->last_ier & ~APP2_DL) | APP2_DL; + break; + case PORT_CTRL: + dc->last_ier = (dc->last_ier & ~CTRL_DL) | CTRL_DL; + break; + default: + dev_err(&dc->pdev->dev, "Called with wrong port?\n"); + return; + break; + }; + + writew(dc->last_ier, dc->reg_ier); +} + +/* Disable downlink interrupts */ +static void disable_transmit_dl(enum port_type port, struct nozomi *dc) +{ + switch (port) { + case PORT_MDM: + dc->last_ier &= ~MDM_DL; + break; + case PORT_DIAG: + dc->last_ier &= ~DIAG_DL; + break; + case PORT_APP1: + dc->last_ier &= ~APP1_DL; + break; + case PORT_APP2: + dc->last_ier &= ~APP2_DL; + break; + case PORT_CTRL: + dc->last_ier &= ~CTRL_DL; + break; + default: + dev_err(&dc->pdev->dev, "Called with wrong port?\n"); + return; + break; + }; + + writew(dc->last_ier, dc->reg_ier); +} + +/* + * Return 1 - send buffer to card and ack. + * Return 0 - don't ack, don't send buffer to card. + */ +static int send_data(enum port_type index, struct nozomi *dc) +{ + u32 size = 0; + struct port *port = &dc->port[index]; + u8 toggle = port->toggle_ul; + void __iomem *addr = port->ul_addr[toggle]; + u32 ul_size = port->ul_size[toggle]; + struct tty_struct *tty = port->tty; + + /* Get data from tty and place in buf for now */ + size = __kfifo_get(port->fifo_ul, dc->send_buf, + ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX); + + if (size == 0) { + DBG4("No more data to send, disable link:"); + return 0; + } + + port->tx_data += size; + + /* DUMP(buf, size); */ + + /* Write length + data */ + write_mem32(addr, (u32 *) &size, 4); + write_mem32(addr + 4, (u32 *) dc->send_buf, size); + + if (tty) + tty_wakeup(tty); + + return 1; +} + +/* If all data has been read, return 1, else 0 */ +static int receive_data(enum port_type index, struct nozomi *dc) +{ + u8 buf[RECEIVE_BUF_MAX] = { 0 }; + int size; + u32 offset = 4; + struct port *port = &dc->port[index]; + void __iomem *addr = port->dl_addr[port->toggle_dl]; + struct tty_struct *tty = port->tty; + int i; + + if (unlikely(!tty)) { + DBG1("tty not open for port: %d?", index); + return 1; + } + + read_mem32((u32 *) &size, addr, 4); + /* DBG1( "%d bytes port: %d", size, index); */ + + if (test_bit(TTY_THROTTLED, &tty->flags)) { + DBG1("No room in tty, don't read data, don't ack interrupt, " + "disable interrupt"); + + /* disable interrupt in downlink... */ + disable_transmit_dl(index, dc); + return 0; + } + + if (unlikely(size == 0)) { + dev_err(&dc->pdev->dev, "size == 0?\n"); + return 1; + } + + port->rx_data += size; + + tty_buffer_request_room(tty, size); + + while (size > 0) { + read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX); + + if (size == 1) { + tty_insert_flip_char(tty, buf[0], TTY_NORMAL); + size = 0; + } else if (size < RECEIVE_BUF_MAX) { + size -= tty_insert_flip_string(tty, (char *) buf, size); + } else { + i = tty_insert_flip_string(tty, \ + (char *) buf, RECEIVE_BUF_MAX); + size -= i; + offset += i; + } + } + + tty_flip_buffer_push(tty); + + return 1; +} + +/* Debug for interrupts */ +#ifdef DEBUG +static char *interrupt2str(u16 interrupt) +{ + static char buf[TMP_BUF_MAX]; + char *p = buf; + + interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL; + interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL2 ") : NULL; + + interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_UL1 ") : NULL; + interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX, "MDM_UL2 ") : NULL; + + interrupt & DIAG_DL1 ? p += snprintf(p, \ + TMP_BUF_MAX, "DIAG_DL1 ") : NULL; + interrupt & DIAG_DL2 ? p += snprintf(p, \ + TMP_BUF_MAX, "DIAG_DL2 ") : NULL; + + interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX, "DIAG_UL ") : NULL; + + interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX, "APP1_DL ") : NULL; + interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX, "APP2_DL ") : NULL; + + interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX, "APP1_UL ") : NULL; + interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX, "APP2_UL ") : NULL; + + interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX, "CTRL_DL ") : NULL; + interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX, "CTRL_UL ") : NULL; + + interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX, "RESET ") : NULL; + + return buf; +} +#endif + +/* + * Receive flow control + * Return 1 - If ok, else 0 + */ +static int receive_flow_control(struct nozomi *dc, struct irq *m) +{ + enum port_type port = PORT_MDM; + struct ctrl_dl ctrl_dl; + struct ctrl_dl old_ctrl; + u16 enable_ier = 0; + + read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2); + + switch (ctrl_dl.port) { + case CTRL_CMD: + DBG1("The Base Band sends this value as a response to a " + "request for IMSI detach sent over the control " + "channel uplink (see section 7.6.1)."); + break; + case CTRL_MDM: + port = PORT_MDM; + enable_ier = MDM_DL; + break; + case CTRL_DIAG: + port = PORT_DIAG; + enable_ier = DIAG_DL; + break; + case CTRL_APP1: + port = PORT_APP1; + enable_ier = APP1_DL; + break; + case CTRL_APP2: + port = PORT_APP2; + enable_ier = APP2_DL; + break; + default: + dev_err(&dc->pdev->dev, + "ERROR: flow control received for non-existing port\n"); + return 0; + }; + + DBG1("0x%04X->0x%04X", *((u16 *) & dc->port[port].ctrl_dl), + *((u16 *) & ctrl_dl)); + + old_ctrl = dc->port[port].ctrl_dl; + dc->port[port].ctrl_dl = ctrl_dl; + + if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) { + DBG1("Disable interrupt (0x%04X) on port: %d", + enable_ier, port); + disable_transmit_ul(port, dc); + + } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) { + + if (__kfifo_len(dc->port[port].fifo_ul)) { + DBG1("Enable interrupt (0x%04X) on port: %d", + enable_ier, port); + DBG1("Data in buffer [%d], enable transmit! ", + __kfifo_len(dc->port[port].fifo_ul)); + enable_transmit_ul(port, dc); + } else { + DBG1("No data in buffer..."); + } + } + + if (*(u16 *) & old_ctrl == *(u16 *) & ctrl_dl) { + DBG1(" No change in mctrl"); + return 1; + } + /* Update statistics */ + if (old_ctrl.CTS != ctrl_dl.CTS) + dc->port[port].tty_icount.cts++; + if (old_ctrl.DSR != ctrl_dl.DSR) + dc->port[port].tty_icount.dsr++; + if (old_ctrl.RI != ctrl_dl.RI) + dc->port[port].tty_icount.rng++; + if (old_ctrl.DCD != ctrl_dl.DCD) + dc->port[port].tty_icount.dcd++; + DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)", + port, + dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts, + dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr); + + return 1; +} + +static enum ctrl_port_type port2ctrl(enum port_type port, + const struct nozomi *dc) +{ + switch (port) { + case PORT_MDM: + return CTRL_MDM; + case PORT_DIAG: + return CTRL_DIAG; + case PORT_APP1: + return CTRL_APP1; + case PORT_APP2: + return CTRL_APP2; + default: + dev_err(&dc->pdev->dev, + "ERROR: send flow control " \ + "received for non-existing port\n"); + }; + return CTRL_ERROR; +} + +/* + * Send flow control, can only update one channel at a time + * Return 0 - If we have updated all flow control + * Return 1 - If we need to update more flow control, ack current enable more + */ +static int send_flow_control(struct nozomi *dc) +{ + u32 i, more_flow_control_to_be_updated = 0; + u16 *ctrl; + + for (i = PORT_MDM; i < MAX_PORT; i++) { + if (dc->port[i].update_flow_control) { + if (more_flow_control_to_be_updated) { + /* We have more flow control to be updated */ + return 1; + } + dc->port[i].ctrl_ul.port = port2ctrl(i, dc); + ctrl = (u16 *) & dc->port[i].ctrl_ul; + write_mem32(dc->port[PORT_CTRL].ul_addr[0], \ + (u32 *) ctrl, 2); + dc->port[i].update_flow_control = 0; + more_flow_control_to_be_updated = 1; + } + } + return 0; +} + +/* + * Handle donlink data, ports that are handled are modem and diagnostics + * Return 1 - ok + * Return 0 - toggle fields are out of sync + */ +static int handle_data_dl(struct nozomi *dc, struct irq *m, enum port_type port, + u8 *toggle, u16 mask1, u16 mask2) +{ + if (*toggle == 0 && m->read_iir & mask1) { + if (receive_data(port, dc)) { + writew(mask1, dc->reg_fcr); + *toggle = !(*toggle); + } + + if (m->read_iir & mask2) { + if (receive_data(port, dc)) { + writew(mask2, dc->reg_fcr); + *toggle = !(*toggle); + } + } + } else if (*toggle == 1 && m->read_iir & mask2) { + if (receive_data(port, dc)) { + writew(mask2, dc->reg_fcr); + *toggle = !(*toggle); + } + + if (m->read_iir & mask1) { + if (receive_data(port, dc)) { + writew(mask1, dc->reg_fcr); + *toggle = !(*toggle); + } + } + } else { + dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n", + *toggle); + return 0; + } + return 1; +} + +/* + * Handle uplink data, this is currently for the modem port + * Return 1 - ok + * Return 0 - toggle field are out of sync + */ +static int handle_data_ul(struct nozomi *dc, struct irq *m, enum port_type port) +{ + u8 *toggle = &(dc->port[port].toggle_ul); + + if (*toggle == 0 && m->read_iir & MDM_UL1) { + dc->last_ier &= ~MDM_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(port, dc)) { + writew(MDM_UL1, dc->reg_fcr); + dc->last_ier = (dc->last_ier & ~MDM_UL) | MDM_UL; + writew(dc->last_ier, dc->reg_ier); + *toggle = !*toggle; + } + + if (m->read_iir & MDM_UL2) { + dc->last_ier &= ~MDM_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(port, dc)) { + writew(MDM_UL2, dc->reg_fcr); + dc->last_ier = \ + (dc->last_ier & ~MDM_UL) | MDM_UL; + writew(dc->last_ier, dc->reg_ier); + *toggle = !*toggle; + } + } + + } else if (*toggle == 1 && m->read_iir & MDM_UL2) { + dc->last_ier &= ~MDM_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(port, dc)) { + writew(MDM_UL2, dc->reg_fcr); + dc->last_ier = (dc->last_ier & ~MDM_UL) | MDM_UL; + writew(dc->last_ier, dc->reg_ier); + *toggle = !*toggle; + } + + if (m->read_iir & MDM_UL1) { + dc->last_ier &= ~MDM_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(port, dc)) { + writew(MDM_UL1, dc->reg_fcr); + dc->last_ier = \ + (dc->last_ier & ~MDM_UL) | MDM_UL; + writew(dc->last_ier, dc->reg_ier); + *toggle = !*toggle; + } + } + } else { + writew(m->read_iir & MDM_UL, dc->reg_fcr); + dev_err(&dc->pdev->dev, "port out of sync!\n"); + return 0; + } + return 1; +} + +static irqreturn_t interrupt_handler(int irq, void *dev_id) +{ + struct nozomi_devices *ndev = dev_id; + struct nozomi *dc; + struct irq *m; + + if (!ndev) + return IRQ_NONE; + + dc = ndev->my_dev; + m = &ndev->my_irq; + + spin_lock(&dc->spin_mutex); + m->read_iir = readw(dc->reg_iir); + + /* Card removed */ + if (m->read_iir == (u16)-1) + goto none; + /* + * Just handle interrupt enabled in IER + * (by masking with dc->last_ier) + */ + m->read_iir &= dc->last_ier; + + if (m->read_iir == 0) + goto none; + + + DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(m->read_iir), + m->read_iir, dc->last_ier); + + if (m->read_iir & RESET) { + if (unlikely(!nozomi_read_config_table(dc))) { + dc->last_ier = 0x0; + writew(dc->last_ier, dc->reg_ier); + dev_err(&dc->pdev->dev, "Could not read status from " + "card, we should disable interface\n"); + } else { + writew(RESET, dc->reg_fcr); + } + /* No more useful info if this was the reset interrupt. */ + goto exit_handler; + } + if (m->read_iir & CTRL_UL) { + DBG1("CTRL_UL"); + dc->last_ier &= ~CTRL_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_flow_control(dc)) { + writew(CTRL_UL, dc->reg_fcr); + dc->last_ier = (dc->last_ier & ~CTRL_UL) | CTRL_UL; + writew(dc->last_ier, dc->reg_ier); + } + } + if (m->read_iir & CTRL_DL) { + receive_flow_control(dc, m); + writew(CTRL_DL, dc->reg_fcr); + } + if (m->read_iir & MDM_DL) { + if (!handle_data_dl(dc, m, PORT_MDM, + &(dc->port[PORT_MDM].toggle_dl), MDM_DL1, + MDM_DL2)) { + dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n"); + goto exit_handler; + } + } + if (m->read_iir & MDM_UL) { + if (!handle_data_ul(dc, m, PORT_MDM)) { + dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n"); + goto exit_handler; + } + } + if (m->read_iir & DIAG_DL) { + if (!handle_data_dl(dc, m, PORT_DIAG, + &(dc->port[PORT_DIAG].toggle_dl), DIAG_DL1, + DIAG_DL2)) { + dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n"); + goto exit_handler; + } + } + if (m->read_iir & DIAG_UL) { + dc->last_ier &= ~DIAG_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(PORT_DIAG, dc)) { + writew(DIAG_UL, dc->reg_fcr); + dc->last_ier = (dc->last_ier & ~DIAG_UL) | DIAG_UL; + writew(dc->last_ier, dc->reg_ier); + } + } + if (m->read_iir & APP1_DL) { + if (receive_data(PORT_APP1, dc)) + writew(APP1_DL, dc->reg_fcr); + } + if (m->read_iir & APP1_UL) { + dc->last_ier &= ~APP1_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(PORT_APP1, dc)) { + writew(APP1_UL, dc->reg_fcr); + dc->last_ier = (dc->last_ier & ~APP1_UL) | APP1_UL; + writew(dc->last_ier, dc->reg_ier); + } + } + if (m->read_iir & APP2_DL) { + if (receive_data(PORT_APP2, dc)) + writew(APP2_DL, dc->reg_fcr); + } + if (m->read_iir & APP2_UL) { + dc->last_ier &= ~APP2_UL; + writew(dc->last_ier, dc->reg_ier); + if (send_data(PORT_APP2, dc)) { + writew(APP2_UL, dc->reg_fcr); + dc->last_ier = (dc->last_ier & ~APP2_UL) | APP2_UL; + writew(dc->last_ier, dc->reg_ier); + } + } + +exit_handler: + spin_unlock(&dc->spin_mutex); + return IRQ_HANDLED; +none: + spin_unlock(&dc->spin_mutex); + return IRQ_NONE; +} + +/* Request a shared IRQ from system */ +static int nozomi_setup_interrupt(struct nozomi_devices *ndev) +{ + int rval; + + rval = request_irq(ndev->my_dev->pdev->irq, &interrupt_handler, + IRQF_SHARED, NOZOMI_NAME, ndev); + if (unlikely(rval)) + dev_err(&ndev->my_dev->pdev->dev, "Cannot open because IRQ %d " + "is already in use.\n", ndev->my_dev->pdev->irq); + + return rval; +} + +static void nozomi_get_card_type(struct nozomi *dc) +{ + int i; + u32 size = 0; + + for (i = 0; i < 6; i++) + size += pci_resource_len(dc->pdev, i); + + /* Assume card type F32_8 if no match */ + dc->card_type = size == 2048 ? F32_2 : F32_8; + + dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type); +} + +static void nozomi_setup_private_data(struct nozomi *dc) +{ + void __iomem *offset = dc->base_addr + dc->card_type / 2; + int i; + + dc->reg_fcr = (void __iomem *)(offset + R_FCR); + dc->reg_iir = (void __iomem *)(offset + R_IIR); + dc->reg_ier = (void __iomem *)(offset + R_IER); + dc->last_ier = 0; + dc->closing = 0; + + dc->port[PORT_MDM].token_dl = MDM_DL; + dc->port[PORT_DIAG].token_dl = DIAG_DL; + dc->port[PORT_APP1].token_dl = APP1_DL; + dc->port[PORT_APP2].token_dl = APP2_DL; + + for (i = PORT_MDM; i < MAX_PORT; ++i) { + dc->port[i].rx_data = 0; + dc->port[i].tx_data = 0; + dc->port[i].tty_dont_flip = 0; + } +} + +static void tty_flip_queue_function(struct work_struct *work) +{ + struct nozomi *dc = container_of(work, struct nozomi, + tty_flip_wq_struct); + int i; + unsigned long flags; + + /* Enable interrupt for that port */ + for (i = 0; i < MAX_PORT; i++) { + if (dc->port[i].tty_dont_flip) { + DBG6("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 ssize_t card_type_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct nozomi_devices *deventry = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", deventry->my_dev->card_type); +} +static DEVICE_ATTR(card_type, 0444, card_type_show, NULL); + +static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct nozomi_devices *deventry = pci_get_drvdata(pdev); + + return sprintf(buf, "%u\n", deventry->my_dev->open_ttys); +} +static DEVICE_ATTR(open_ttys, 0444, open_ttys_show, NULL); + +static void make_sysfs_files(struct nozomi *dc) +{ + if (device_create_file(&dc->pdev->dev, &dev_attr_card_type)) + dev_err(&dc->pdev->dev, + "Could not create sysfs file for card_type\n"); + if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys)) + dev_err(&dc->pdev->dev, + "Could not create sysfs file for open_ttys\n"); +} + +static void remove_sysfs_files(struct nozomi *dc) +{ + device_remove_file(&dc->pdev->dev, &dev_attr_card_type); + device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys); +} + +/* Allocate memory for one device */ +static int __devinit nozomi_card_init(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + resource_size_t start; + int ret = -EIO; + struct nozomi *dc = NULL; + struct nozomi_devices *newdev = NULL; + int i; + + atomic_inc(&cards_found); + dev_dbg(&pdev->dev, "Init, cards_found: %d\n", + atomic_read(&cards_found)); + + dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL); + if (unlikely(!dc)) { + dev_err(&pdev->dev, "Could not allocate memory\n"); + return -ENOMEM; + } + newdev = kzalloc(sizeof(struct nozomi_devices), GFP_KERNEL); + if (unlikely(!newdev)) { + dev_err(&pdev->dev, "Could not allocate memory\n"); + kfree(dc); + return -ENOMEM; + } + dc->pdev = pdev; + pci_set_drvdata(pdev, dc); + + newdev->my_dev = dc; + + /* 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"); + kfree(dc); + kfree(newdev); + return -ENODEV; + } + + start = pci_resource_start(dc->pdev, 0); + if (start == 0x0000) { + dev_err(&pdev->dev, "No I/O-Address for card detected\n"); + ret = -ENODEV; + goto err_disable_device; + } + + dc->base_addr = ioremap(start, dc->card_type); + if (!dc->base_addr) { + dev_err(&pdev->dev, "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 */ + dc->last_ier = 0; + writew(dc->last_ier, dc->reg_ier); + + /* Setup interrupt handler */ + if (nozomi_setup_interrupt(newdev)) { + ret = -EIO; + goto err_disable_regions; + } + + DBG1("base_addr: %p", dc->base_addr); + + dc->tty_flip_wq = create_singlethread_workqueue(NOZOMI_NAME); + if (!dc->tty_flip_wq) { + dev_err(&dc->pdev->dev, "Could not create workqueue?\n"); + return -ENOMEM; + } + INIT_WORK(&dc->tty_flip_wq_struct, tty_flip_queue_function); + + spin_lock_init(&dc->spin_mutex); + + make_sysfs_files(dc); + + if (atomic_read(&cards_found) == 1) { + ntty_tty_init(dc); + newdev->index_start = 0; + } else { + dc->tty_driver->num += NTTY_TTY_MINORS; + for (i = 0; i < NTTY_TTY_MINORS; i++) { + init_MUTEX(&dc->port[i].tty_sem); + dc->port[i].tty_open_count = 0; + dc->port[i].tty = NULL; + tty_register_device(dc->tty_driver, + i + (atomic_read(&cards_found) + * NTTY_TTY_MINORS), + &dc->pdev->dev); + } + newdev->index_start = + atomic_read(&cards_found) * NTTY_TTY_MINORS; + } + + /* Enable RESET interrupt. */ + dc->last_ier = RESET; + writew(dc->last_ier, dc->reg_ier); + + INIT_LIST_HEAD(&newdev->list); + list_add_tail(&newdev->list, &my_devices); + + pci_set_drvdata(pdev, newdev); + + return 0; + +err_disable_regions: + pci_release_regions(pdev); + iounmap(dc->base_addr); + dc->base_addr = NULL; + +err_disable_device: + pci_disable_device(pdev); + kfree(dc); + kfree(newdev); + return ret; +} + +static void tty_do_close(struct nozomi *dc, struct port *port) +{ + unsigned long flags; + + if (!dc || !port) + return; + + if (down_interruptible(&port->tty_sem)) + return; + + if (!port->tty_open_count) + goto exit; + + dc->open_ttys--; + port->tty_open_count--; + + if (port->tty_open_count == 0) { + DBG1("close: %d", port->token_dl); + spin_lock_irqsave(&dc->spin_mutex, flags); + dc->last_ier &= ~(port->token_dl); + writew(dc->last_ier, dc->reg_ier); + spin_unlock_irqrestore(&dc->spin_mutex, flags); + } + +exit: + up(&port->tty_sem); +} + +static void __devexit tty_exit(struct nozomi_devices *ndev) +{ + struct nozomi *dc = ndev->my_dev; + int i, ret; + + DBG1(" "); + + flush_scheduled_work(); + + for (i = ndev->index_start; i < ndev->index_start + NTTY_TTY_MINORS; \ + ++i) + if (dc->port[i].tty && \ + list_empty(&dc->port[i].tty->hangup_work.entry)) + tty_hangup(dc->port[i].tty); + + while (dc->open_ttys) + msleep_interruptible(1); + + for (i = ndev->index_start; i < ndev->index_start + NTTY_TTY_MINORS; \ + ++i) + tty_unregister_device(dc->tty_driver, i); + + ret = tty_unregister_driver(dc->tty_driver); + if (ret) + printk(KERN_ERR "Unable to unregister the tty driver !" + " (%d)\n", ret); + put_tty_driver(dc->tty_driver); +} + +/* Deallocate memory for one device */ +static void __devexit nozomi_card_exit(struct pci_dev *pdev) +{ + int i; + struct ctrl_ul ctrl; + struct nozomi_devices *deventry = pci_get_drvdata(pdev); + struct nozomi *dc = deventry->my_dev; + + /* Disable all interrupts */ + dc->last_ier = 0; + writew(dc->last_ier, dc->reg_ier); + + tty_exit(deventry); + + /* Send 0x0001, command card to resend the reset token. */ + /* This is to get the reset when the module is reloaded. */ + ctrl.port = 0x00; + ctrl.reserved = 0; + ctrl.RTS = 0; + ctrl.DTR = 1; + DBG1("sending flow control 0x%04X", *((u16 *) & ctrl)); + + /* Setup dc->reg addresses to we can use defines here */ + nozomi_setup_private_data(dc); + write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *) & ctrl, 2); + writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */ + + DBG1("pci_release_regions"); + pci_release_regions(pdev); + + if (dc->base_addr) + iounmap(dc->base_addr); + + DBG1("pci_disable_device"); + pci_disable_device(pdev); + + free_irq(pdev->irq, deventry); + + for (i = PORT_MDM; i < MAX_PORT; i++) + kfree(dc->port[i].fifo_ul); + + kfree(dc->send_buf); + + remove_sysfs_files(dc); + + destroy_workqueue(dc->tty_flip_wq); + + kfree(dc); + deventry->my_dev = 0; + + list_del(&deventry->list); + kfree(deventry); + + atomic_dec(&cards_found); +} + +static void set_rts(int index, int rts) +{ + struct nozomi *dc = get_dc_by_index(index); + + 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) +{ + struct nozomi *dc = get_dc_by_index(index); + + DBG1("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) +{ + struct port *port = get_port_by_tty(tty); + struct nozomi *dc = get_dc_by_tty(tty); + unsigned long flags; + + if (down_interruptible(&port->tty_sem)) + return -ERESTARTSYS; + + port->tty_open_count++; + dc->open_ttys++; + + /* Enable interrupt downlink for channel */ + if (port->tty_open_count == 1) { + tty->low_latency = 1; + tty->driver_data = port; + port->tty = tty; + port->tty_index = tty->index; + port->rx_data = 0; + port->tx_data = 0; + DBG1("open: %d", port->token_dl); + spin_lock_irqsave(&dc->spin_mutex, flags); + dc->last_ier = + (dc->last_ier & ~(port->token_dl)) | port->token_dl; + writew(dc->last_ier, dc->reg_ier); + spin_unlock_irqrestore(&dc->spin_mutex, flags); + } + + up(&port->tty_sem); + + return 0; +} + +/* Called when the userspace process close the tty, /dev/noz*. */ +static void ntty_close(struct tty_struct *tty, struct file *file) +{ + struct nozomi *dc = get_dc_by_tty(tty); + tty_do_close(dc, (struct port *)tty->driver_data); +} + +/* + * called when the userspace process writes to the tty (/dev/noz*). + * Data is inserted into a fifo, which is then read and transfered to the modem. + */ +static int ntty_write(struct tty_struct *tty, const unsigned char *buffer, + int count) +{ + int rval = -EINVAL; + struct nozomi *dc = get_dc_by_tty(tty); + struct port *port = (struct port *)tty->driver_data; + unsigned long flags; + + /* DBG1( "WRITEx: %d, index = %d", count, index); */ + + if (!dc || !port) + return -ENODEV; + + if (unlikely(down_trylock(&port->tty_sem))) { + /* + * must test lock as tty layer wraps calls + * to this function with BKL + */ + dev_err(&dc->pdev->dev, "Would have deadlocked - " + "return ERESTARTSYS\n"); + return -ERESTARTSYS; + } + + if (unlikely(!port->tty_open_count)) { + DBG1(" "); + goto exit; + } + + rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count); + + /* notify card */ + if (unlikely(dc == NULL)) { + DBG1("No device context?"); + goto exit; + } + + spin_lock_irqsave(&dc->spin_mutex, flags); + /* CTS is only valid on the modem channel */ + if (port == &(dc->port[PORT_MDM])) { + if (port->ctrl_dl.CTS) { + DBG4("Enable interrupt"); + enable_transmit_ul(port->tty_index, dc); + } else { + dev_err(&dc->pdev->dev, + "CTS not active on modem port?\n"); + } + } 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; + struct nozomi *dc = get_dc_by_tty(tty); + + if (!dc || !port) + return 0; + if (down_trylock(&port->tty_sem)) + return 0; + + if (!port->tty_open_count) + goto exit; + + room = port->fifo_ul->size - __kfifo_len(port->fifo_ul); + +exit: + up(&port->tty_sem); + return room; +} + +/* Sets termios flags, called by the tty layer. */ +static void ntty_set_termios(struct tty_struct *tty, + struct ktermios *old_termios) +{ + unsigned int cflag; + + cflag = tty->termios->c_cflag; + + /* get the byte size */ + switch (cflag & CSIZE) { + case CS5: + DBG1(" - data bits = 5"); + break; + case CS6: + DBG1(" - data bits = 6"); + break; + case CS7: + DBG1(" - data bits = 7"); + break; + default: + case CS8: + DBG1(" - data bits = 8"); + break; + } + + /* determine the parity */ + if (cflag & PARENB) { + if (cflag & PARODD) { + DBG1(" - parity = odd"); + } else { + DBG1(" - parity = even"); + } + } else { + DBG1(" - parity = none"); + } + + /* figure out the stop bits requested */ + if (cflag & CSTOPB) { + DBG1(" - stop bits = 2"); + } else { + DBG1(" - stop bits = 1"); + } + + /* figure out the hardware flow control settings */ + if (cflag & CRTSCTS) { + DBG1(" - RTS/CTS is enabled"); + } else { + DBG1(" - 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)) { + /* if we are implementing INBOUND XON/XOFF */ + if (I_IXOFF(tty)) + DBG1(" - INBOUND XON/XOFF is enabled, " + "XON = %2x, XOFF = %2x", + START_CHAR(tty), STOP_CHAR(tty)); + else + DBG1(" - INBOUND XON/XOFF is disabled"); + + /* if we are implementing OUTBOUND XON/XOFF */ + if (I_IXON(tty)) + DBG1(" - OUTBOUND XON/XOFF is enabled, " + "XON = %2x, XOFF = %2x", + START_CHAR(tty), STOP_CHAR(tty)); + else + DBG1(" - OUTBOUND XON/XOFF is disabled"); + } + + return; +} + +/* Gets io control parameters */ +static int ntty_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct port *port = tty->driver_data; + struct ctrl_dl *ctrl_dl = &port->ctrl_dl; + struct ctrl_ul *ctrl_ul = &port->ctrl_ul; + + return 0 | (ctrl_ul->RTS ? TIOCM_RTS : 0) + | (ctrl_ul->DTR ? TIOCM_DTR : 0) + | (ctrl_dl->DCD ? TIOCM_CAR : 0) + | (ctrl_dl->RI ? TIOCM_RNG : 0) + | (ctrl_dl->DSR ? TIOCM_DSR : 0) + | (ctrl_dl->CTS ? TIOCM_CTS : 0); +} + +/* Sets io controls parameters */ +static int ntty_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct port *port = (struct port *)tty->driver_data; + + if (set & TIOCM_RTS) + set_rts(port->tty_index, 1); + else if (clear & TIOCM_RTS) + set_rts(port->tty_index, 0); + + if (set & TIOCM_DTR) + set_dtr(port->tty_index, 1); + else if (clear & TIOCM_DTR) + set_dtr(port->tty_index, 0); + + return 0; +} + +static int ntty_ioctl_tiocmiwait(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct port *port = (struct port *)tty->driver_data; + + if (cmd == TIOCMIWAIT) { + DECLARE_WAITQUEUE(wait, current); + struct async_icount cnow; + struct async_icount cprev; + + cprev = port->tty_icount; + while (1) { + add_wait_queue(&port->tty_wait, &wait); + set_current_state(TASK_INTERRUPTIBLE); + schedule(); + remove_wait_queue(&port->tty_wait, &wait); + + /* see if a signal woke us up */ + if (signal_pending(current)) + return -ERESTARTSYS; + + cnow = port->tty_icount; + if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && + cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) + return -EIO; /* no change => error */ + if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || + ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || + ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || + ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) + return 0; + + cprev = cnow; + } + + } + return -ENOIOCTLCMD; +} + +static int ntty_ioctl_tiocgicount(struct tty_struct *tty, struct file *file, + unsigned int cmd, void __user *arg) +{ + struct port *port = (struct port *)tty->driver_data; + + if (cmd == TIOCGICOUNT) { + struct async_icount cnow = port->tty_icount; + struct serial_icounter_struct icount; + + icount.cts = cnow.cts; + icount.dsr = cnow.dsr; + icount.rng = cnow.rng; + icount.dcd = cnow.dcd; + icount.rx = cnow.rx; + icount.tx = cnow.tx; + icount.frame = cnow.frame; + icount.overrun = cnow.overrun; + icount.parity = cnow.parity; + icount.brk = cnow.brk; + icount.buf_overrun = cnow.buf_overrun; + + if (copy_to_user(arg, &icount, sizeof(icount))) + return -EFAULT; + return 0; + } + return -ENOIOCTLCMD; +} + +static int ntty_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct port *port = tty->driver_data; + struct nozomi *dc = get_dc_by_tty(tty); + unsigned long flags; + int mask; + int rval = -ENOIOCTLCMD; + + DBG1("******** IOCTL, cmd: %d", cmd); + + switch (cmd) { + case TCGETS: + DBG1("IOCTL TCGETS ..."); + rval = -ENOIOCTLCMD; + break; + case TCSETS: + DBG1("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, ~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: + DBG1("IOCTL TCFLSH ..."); + rval = -ENOIOCTLCMD; + break; + + default: + DBG1("ERR: 0x%08X, %d", cmd, cmd); + break; + }; + + return rval; +} + +/* + * Called by the upper tty layer when tty buffers are ready + * to receive data again after a call to throttle. + */ +static void ntty_unthrottle(struct tty_struct *tty) +{ + struct port *port = (struct port *)tty->driver_data; + struct nozomi *dc = get_dc_by_tty(tty); + unsigned long flags; + + DBG1("UNTHROTTLE"); + spin_lock_irqsave(&dc->spin_mutex, flags); + enable_transmit_dl(port->tty_index, dc); + set_rts(port->tty_index, 1); + + spin_unlock_irqrestore(&dc->spin_mutex, flags); +} + +/* + * Called by the upper tty layer when the tty buffers are almost full. + * The driver should stop send more data. + */ +static void ntty_throttle(struct tty_struct *tty) +{ + struct port *port = (struct port *)tty->driver_data; + struct nozomi *dc = get_dc_by_tty(tty); + unsigned long flags; + + DBG1("THROTTLE"); + spin_lock_irqsave(&dc->spin_mutex, flags); + set_rts(port->tty_index, 0); + spin_unlock_irqrestore(&dc->spin_mutex, flags); +} + +/* just to discard single character writes */ +static void ntty_put_char(struct tty_struct *tty, unsigned char c) +{ + DBG2("PUT CHAR Function: %c", c); +} + +/* Returns number of chars in buffer, called by tty layer */ +static s32 ntty_chars_in_buffer(struct tty_struct *tty) +{ + struct port *port = (struct port *)tty->driver_data; + struct nozomi *dc = get_dc_by_tty(tty); + s32 rval; + + if (unlikely(!dc || !port)) { + rval = -ENODEV; + goto exit_in_buffer; + } + + if (unlikely(!port->tty_open_count)) { + dev_err(&dc->pdev->dev, "No tty open?\n"); + rval = -ENODEV; + goto exit_in_buffer; + } + + rval = __kfifo_len(port->fifo_ul); + +exit_in_buffer: + return rval; +} + +static struct tty_operations tty_ops = { + .ioctl = ntty_ioctl, + .open = ntty_open, + .close = ntty_close, + .write = ntty_write, + .write_room = ntty_write_room, + .unthrottle = ntty_unthrottle, + .throttle = ntty_throttle, + .set_termios = ntty_set_termios, + .chars_in_buffer = ntty_chars_in_buffer, + .put_char = ntty_put_char, + .tiocmset = ntty_tiocmset, +}; + +/* Initializes the tty */ +static int ntty_tty_init(struct nozomi *dc) +{ + struct tty_driver *td; + int rval; + 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; + td->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + td->init_termios = tty_std_termios; + td->init_termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL; + + td->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; + tty_register_device(td, i, &dc->pdev->dev); + } + + dev_info(&dc->pdev->dev, DRIVER_DESC " " NOZOMI_NAME_TTY "\n"); + return rval; +} + +/* Module initialization */ +static struct pci_driver nozomi_driver = { + .name = NOZOMI_NAME, + .id_table = nozomi_pci_tbl, + .probe = nozomi_card_init, + .remove = __devexit_p(nozomi_card_exit), +}; + +static __init int nozomi_init(void) +{ + printk(KERN_INFO "Initializing %s\n", VERSION_STRING); + return pci_register_driver(&nozomi_driver); +} + +static __exit void nozomi_exit(void) +{ + printk(KERN_INFO "Unloading %s\n", DRIVER_DESC); + pci_unregister_driver(&nozomi_driver); +} + +module_init(nozomi_init); +module_exit(nozomi_exit); + +module_param(debug, int, S_IRUGO | S_IWUSR); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION(DRIVER_DESC);