2
* nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
4
* Written by: Ulf Jakobsson,
8
* Maintained by: Paul Hardwick (p.hardwick@option.com)
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* Locking code changes for Vodafone by Sphere Systems Ltd,
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* Andrew Bird (ajb@spheresystems.co.uk )
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* Source has been ported from an implementation made by Filip Aben @ Option
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* --------------------------------------------------------------------------
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* Copyright (c) 2005,2006 Option Wireless Sweden AB
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* Copyright (c) 2006 Sphere Systems Ltd
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* Copyright (c) 2006 Option Wireless n/v
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* All rights Reserved.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
35
* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* --------------------------------------------------------------------------
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/* Enable this to have a lot of debug printouts */
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/sched.h>
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#include <linux/serial.h>
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#include <linux/interrupt.h>
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#include <linux/kmod.h>
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#include <linux/init.h>
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#include <linux/kfifo.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include <asm/byteorder.h>
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#include <linux/delay.h>
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#define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
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__DATE__ " " __TIME__ ")"
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/* Macros definitions */
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/* Default debug printout level */
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#define NOZOMI_DEBUG_LEVEL 0x00
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#define P_BUF_SIZE 128
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#define NFO(_err_flag_, args...) \
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char tmp[P_BUF_SIZE]; \
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snprintf(tmp, sizeof(tmp), ##args); \
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printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
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#define DBG1(args...) D_(0x01, ##args)
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#define DBG2(args...) D_(0x02, ##args)
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#define DBG3(args...) D_(0x04, ##args)
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#define DBG4(args...) D_(0x08, ##args)
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#define DBG5(args...) D_(0x10, ##args)
86
#define DBG6(args...) D_(0x20, ##args)
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#define DBG7(args...) D_(0x40, ##args)
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#define DBG8(args...) D_(0x80, ##args)
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/* Do we need this settable at runtime? */
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static int debug = NOZOMI_DEBUG_LEVEL;
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#define D(lvl, args...) do \
95
{if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
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#define D_(lvl, args...) D(lvl, ##args)
99
/* These printouts are always printed */
103
#define D_(lvl, args...)
106
/* TODO: rewrite to optimize macros... */
108
#define TMP_BUF_MAX 256
110
#define DUMP(buf__,len__) \
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char tbuf[TMP_BUF_MAX] = {0};\
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snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
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if (tbuf[len__-2] == '\r') {\
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tbuf[len__-2] = 'r';\
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DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
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DBG1("SENDING: '%s' (%d)", tbuf, len__);\
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#define NOZOMI_NAME "nozomi"
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#define NOZOMI_NAME_TTY "nozomi_tty"
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#define DRIVER_DESC "Nozomi driver"
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#define NTTY_TTY_MAXMINORS 256
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#define NTTY_FIFO_BUFFER_SIZE 8192
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/* Must be power of 2 */
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#define FIFO_BUFFER_SIZE_UL 8192
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/* Size of tmp send buffer to card */
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#define SEND_BUF_MAX 1024
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#define RECEIVE_BUF_MAX 4
140
#define R_IIR 0x0000 /* Interrupt Identity Register */
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#define R_FCR 0x0000 /* Flow Control Register */
142
#define R_IER 0x0004 /* Interrupt Enable Register */
144
#define CONFIG_MAGIC 0xEFEFFEFE
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#define TOGGLE_VALID 0x0000
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/* Definition of interrupt tokens */
148
#define MDM_DL1 0x0001
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#define MDM_UL1 0x0002
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#define MDM_DL2 0x0004
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#define MDM_UL2 0x0008
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#define DIAG_DL1 0x0010
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#define DIAG_DL2 0x0020
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#define DIAG_UL 0x0040
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#define APP1_DL 0x0080
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#define APP1_UL 0x0100
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#define APP2_DL 0x0200
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#define APP2_UL 0x0400
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#define CTRL_DL 0x0800
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#define CTRL_UL 0x1000
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#define MDM_DL (MDM_DL1 | MDM_DL2)
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#define MDM_UL (MDM_UL1 | MDM_UL2)
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#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
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/* modem signal definition */
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#define CTRL_DSR 0x0001
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#define CTRL_DCD 0x0002
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#define CTRL_RI 0x0004
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#define CTRL_CTS 0x0008
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#define CTRL_DTR 0x0001
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#define CTRL_RTS 0x0002
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#define NOZOMI_MAX_PORTS 5
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#define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
180
/* Type definitions */
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* There are two types of nozomi cards,
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* one with 2048 memory and with 8192 memory
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F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
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F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
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/* Initialization states a card can be in */
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NOZOMI_STATE_UKNOWN = 0,
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NOZOMI_STATE_ENABLED = 1, /* pci device enabled */
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NOZOMI_STATE_ALLOCATED = 2, /* config setup done */
196
NOZOMI_STATE_READY = 3, /* flowcontrols received */
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/* Two different toggle channels exist */
205
/* Port definition for the card regarding flow control */
206
enum ctrl_port_type {
215
/* Ports that the nozomi has */
229
unsigned int enabled:5; /*
230
* Toggle fields are valid if enabled is 0,
231
* else A-channels must always be used.
233
unsigned int diag_dl:1;
234
unsigned int mdm_dl:1;
235
unsigned int mdm_ul:1;
236
} __attribute__ ((packed));
238
/* Configuration table to read at startup of card */
239
/* Is for now only needed during initialization phase */
240
struct config_table {
242
u16 product_information;
245
struct toggles toggle;
248
* If this is 64, it can hold
249
* 60 bytes + 4 that is length field
255
* If this is 64, it can hold
256
* 60 bytes + 4 that is length field
271
} __attribute__ ((packed));
273
/* This stores all control downlink flags */
276
unsigned int reserved:4;
281
} __attribute__ ((packed));
283
/* This stores all control uplink flags */
286
unsigned int reserved:6;
289
} __attribute__ ((packed));
294
/* This represents the toggle information */
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unsigned int mdm_ul:1;
297
unsigned int mdm_dl:1;
298
unsigned int diag_dl:1;
299
unsigned int enabled:5; /*
300
* Toggle fields are valid if enabled is 0,
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* else A-channels must always be used.
303
} __attribute__ ((packed));
305
/* Configuration table to read at startup of card */
306
struct config_table {
309
u16 product_information;
310
struct toggles toggle;
314
* If this is 64, it can hold
315
* 60 bytes + 4 that is length field
331
} __attribute__ ((packed));
333
/* This stores all control downlink flags */
339
unsigned int reserverd:4;
341
} __attribute__ ((packed));
343
/* This stores all control uplink flags */
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unsigned int reserved:6;
349
} __attribute__ ((packed));
352
/* This holds all information that is needed regarding a port */
354
struct tty_port port;
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u8 update_flow_control;
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struct ctrl_ul ctrl_ul;
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struct ctrl_dl ctrl_dl;
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struct kfifo fifo_ul;
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void __iomem *dl_addr[2];
362
void __iomem *ul_addr[2];
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/* mutex to ensure one access patch to this port */
368
struct mutex tty_sem;
369
wait_queue_head_t tty_wait;
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struct async_icount tty_icount;
375
/* Private data one for each card in the system */
377
void __iomem *base_addr;
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/* Pointers to registers */
381
void __iomem *reg_iir;
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void __iomem *reg_fcr;
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void __iomem *reg_ier;
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enum card_type card_type;
387
struct config_table config_table; /* Configuration table */
388
struct pci_dev *pdev;
389
struct port port[NOZOMI_MAX_PORTS];
392
spinlock_t spin_mutex; /* secures access to registers and tty */
394
unsigned int index_start;
395
enum card_state state;
399
/* This is a data packet that is read or written to/from card */
401
u32 size; /* size is the length of the data buffer */
403
} __attribute__ ((packed));
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/* Global variables */
406
static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
407
{PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */
411
MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
413
static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
414
static struct tty_driver *ntty_driver;
416
static const struct tty_port_operations noz_tty_port_ops;
419
* find card by tty_index
421
static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
423
return tty ? ndevs[tty->index / MAX_PORT] : NULL;
426
static inline struct port *get_port_by_tty(const struct tty_struct *tty)
428
struct nozomi *ndev = get_dc_by_tty(tty);
429
return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
438
static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
442
const u32 __iomem *ptr = mem_addr_start;
445
if (unlikely(!ptr || !buf))
448
/* shortcut for extremely often used cases */
449
switch (size_bytes) {
450
case 2: /* 2 bytes */
452
*buf16 = __le16_to_cpu(readw(ptr));
455
case 4: /* 4 bytes */
456
*(buf) = __le32_to_cpu(readl(ptr));
461
while (i < size_bytes) {
462
if (size_bytes - i == 2) {
463
/* Handle 2 bytes in the end */
465
*(buf16) = __le16_to_cpu(readw(ptr));
469
*(buf) = __le32_to_cpu(readl(ptr));
484
static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
488
u32 __iomem *ptr = mem_addr_start;
491
if (unlikely(!ptr || !buf))
494
/* shortcut for extremely often used cases */
495
switch (size_bytes) {
496
case 2: /* 2 bytes */
497
buf16 = (const u16 *)buf;
498
writew(__cpu_to_le16(*buf16), ptr);
502
* also needs to write 4 bytes in this case
503
* so falling through..
505
case 4: /* 4 bytes */
506
writel(__cpu_to_le32(*buf), ptr);
511
while (i < size_bytes) {
512
if (size_bytes - i == 2) {
514
buf16 = (const u16 *)buf;
515
writew(__cpu_to_le16(*buf16), ptr);
519
writel(__cpu_to_le32(*buf), ptr);
528
/* Setup pointers to different channels and also setup buffer sizes. */
529
static void setup_memory(struct nozomi *dc)
531
void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
532
/* The length reported is including the length field of 4 bytes,
533
* hence subtract with 4.
535
const u16 buff_offset = 4;
537
/* Modem port dl configuration */
538
dc->port[PORT_MDM].dl_addr[CH_A] = offset;
539
dc->port[PORT_MDM].dl_addr[CH_B] =
540
(offset += dc->config_table.dl_mdm_len1);
541
dc->port[PORT_MDM].dl_size[CH_A] =
542
dc->config_table.dl_mdm_len1 - buff_offset;
543
dc->port[PORT_MDM].dl_size[CH_B] =
544
dc->config_table.dl_mdm_len2 - buff_offset;
546
/* Diag port dl configuration */
547
dc->port[PORT_DIAG].dl_addr[CH_A] =
548
(offset += dc->config_table.dl_mdm_len2);
549
dc->port[PORT_DIAG].dl_size[CH_A] =
550
dc->config_table.dl_diag_len1 - buff_offset;
551
dc->port[PORT_DIAG].dl_addr[CH_B] =
552
(offset += dc->config_table.dl_diag_len1);
553
dc->port[PORT_DIAG].dl_size[CH_B] =
554
dc->config_table.dl_diag_len2 - buff_offset;
556
/* App1 port dl configuration */
557
dc->port[PORT_APP1].dl_addr[CH_A] =
558
(offset += dc->config_table.dl_diag_len2);
559
dc->port[PORT_APP1].dl_size[CH_A] =
560
dc->config_table.dl_app1_len - buff_offset;
562
/* App2 port dl configuration */
563
dc->port[PORT_APP2].dl_addr[CH_A] =
564
(offset += dc->config_table.dl_app1_len);
565
dc->port[PORT_APP2].dl_size[CH_A] =
566
dc->config_table.dl_app2_len - buff_offset;
568
/* Ctrl dl configuration */
569
dc->port[PORT_CTRL].dl_addr[CH_A] =
570
(offset += dc->config_table.dl_app2_len);
571
dc->port[PORT_CTRL].dl_size[CH_A] =
572
dc->config_table.dl_ctrl_len - buff_offset;
574
offset = dc->base_addr + dc->config_table.ul_start;
576
/* Modem Port ul configuration */
577
dc->port[PORT_MDM].ul_addr[CH_A] = offset;
578
dc->port[PORT_MDM].ul_size[CH_A] =
579
dc->config_table.ul_mdm_len1 - buff_offset;
580
dc->port[PORT_MDM].ul_addr[CH_B] =
581
(offset += dc->config_table.ul_mdm_len1);
582
dc->port[PORT_MDM].ul_size[CH_B] =
583
dc->config_table.ul_mdm_len2 - buff_offset;
585
/* Diag port ul configuration */
586
dc->port[PORT_DIAG].ul_addr[CH_A] =
587
(offset += dc->config_table.ul_mdm_len2);
588
dc->port[PORT_DIAG].ul_size[CH_A] =
589
dc->config_table.ul_diag_len - buff_offset;
591
/* App1 port ul configuration */
592
dc->port[PORT_APP1].ul_addr[CH_A] =
593
(offset += dc->config_table.ul_diag_len);
594
dc->port[PORT_APP1].ul_size[CH_A] =
595
dc->config_table.ul_app1_len - buff_offset;
597
/* App2 port ul configuration */
598
dc->port[PORT_APP2].ul_addr[CH_A] =
599
(offset += dc->config_table.ul_app1_len);
600
dc->port[PORT_APP2].ul_size[CH_A] =
601
dc->config_table.ul_app2_len - buff_offset;
603
/* Ctrl ul configuration */
604
dc->port[PORT_CTRL].ul_addr[CH_A] =
605
(offset += dc->config_table.ul_app2_len);
606
dc->port[PORT_CTRL].ul_size[CH_A] =
607
dc->config_table.ul_ctrl_len - buff_offset;
610
/* Dump config table under initalization phase */
612
static void dump_table(const struct nozomi *dc)
614
DBG3("signature: 0x%08X", dc->config_table.signature);
615
DBG3("version: 0x%04X", dc->config_table.version);
616
DBG3("product_information: 0x%04X", \
617
dc->config_table.product_information);
618
DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
619
DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
620
DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
621
DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
623
DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
624
DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
625
dc->config_table.dl_mdm_len1);
626
DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
627
dc->config_table.dl_mdm_len2);
628
DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
629
dc->config_table.dl_diag_len1);
630
DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
631
dc->config_table.dl_diag_len2);
632
DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
633
dc->config_table.dl_app1_len);
634
DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
635
dc->config_table.dl_app2_len);
636
DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
637
dc->config_table.dl_ctrl_len);
638
DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
639
dc->config_table.ul_start);
640
DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
641
dc->config_table.ul_mdm_len1);
642
DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
643
dc->config_table.ul_mdm_len2);
644
DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
645
dc->config_table.ul_diag_len);
646
DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
647
dc->config_table.ul_app1_len);
648
DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
649
dc->config_table.ul_app2_len);
650
DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
651
dc->config_table.ul_ctrl_len);
654
static inline void dump_table(const struct nozomi *dc) { }
658
* Read configuration table from card under intalization phase
659
* Returns 1 if ok, else 0
661
static int nozomi_read_config_table(struct nozomi *dc)
663
read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
664
sizeof(struct config_table));
666
if (dc->config_table.signature != CONFIG_MAGIC) {
667
dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
668
dc->config_table.signature, CONFIG_MAGIC);
672
if ((dc->config_table.version == 0)
673
|| (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
675
DBG1("Second phase, configuring card");
679
dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
680
dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
681
dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
682
DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
683
dc->port[PORT_MDM].toggle_ul,
684
dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
688
for (i = PORT_MDM; i < MAX_PORT; i++) {
689
memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
690
memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
693
/* Enable control channel */
694
dc->last_ier = dc->last_ier | CTRL_DL;
695
writew(dc->last_ier, dc->reg_ier);
697
dc->state = NOZOMI_STATE_ALLOCATED;
698
dev_info(&dc->pdev->dev, "Initialization OK!\n");
702
if ((dc->config_table.version > 0)
703
&& (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
705
DBG1("First phase: pushing upload buffers, clearing download");
707
dev_info(&dc->pdev->dev, "Version of card: %d\n",
708
dc->config_table.version);
710
/* Here we should disable all I/O over F32. */
714
* We should send ALL channel pair tokens back along
718
/* push upload modem buffers */
719
write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
721
write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
724
writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
726
DBG1("First phase done");
732
/* Enable uplink interrupts */
733
static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
735
static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
737
if (port < NOZOMI_MAX_PORTS) {
738
dc->last_ier |= mask[port];
739
writew(dc->last_ier, dc->reg_ier);
741
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
745
/* Disable uplink interrupts */
746
static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
748
static const u16 mask[] =
749
{~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
751
if (port < NOZOMI_MAX_PORTS) {
752
dc->last_ier &= mask[port];
753
writew(dc->last_ier, dc->reg_ier);
755
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
759
/* Enable downlink interrupts */
760
static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
762
static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
764
if (port < NOZOMI_MAX_PORTS) {
765
dc->last_ier |= mask[port];
766
writew(dc->last_ier, dc->reg_ier);
768
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
772
/* Disable downlink interrupts */
773
static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
775
static const u16 mask[] =
776
{~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
778
if (port < NOZOMI_MAX_PORTS) {
779
dc->last_ier &= mask[port];
780
writew(dc->last_ier, dc->reg_ier);
782
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
787
* Return 1 - send buffer to card and ack.
788
* Return 0 - don't ack, don't send buffer to card.
790
static int send_data(enum port_type index, struct nozomi *dc)
793
struct port *port = &dc->port[index];
794
const u8 toggle = port->toggle_ul;
795
void __iomem *addr = port->ul_addr[toggle];
796
const u32 ul_size = port->ul_size[toggle];
797
struct tty_struct *tty = tty_port_tty_get(&port->port);
799
/* Get data from tty and place in buf for now */
800
size = kfifo_out(&port->fifo_ul, dc->send_buf,
801
ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
804
DBG4("No more data to send, disable link:");
809
/* DUMP(buf, size); */
811
/* Write length + data */
812
write_mem32(addr, (u32 *) &size, 4);
813
write_mem32(addr + 4, (u32 *) dc->send_buf, size);
822
/* If all data has been read, return 1, else 0 */
823
static int receive_data(enum port_type index, struct nozomi *dc)
825
u8 buf[RECEIVE_BUF_MAX] = { 0 };
828
struct port *port = &dc->port[index];
829
void __iomem *addr = port->dl_addr[port->toggle_dl];
830
struct tty_struct *tty = tty_port_tty_get(&port->port);
833
if (unlikely(!tty)) {
834
DBG1("tty not open for port: %d?", index);
838
read_mem32((u32 *) &size, addr, 4);
839
/* DBG1( "%d bytes port: %d", size, index); */
841
if (test_bit(TTY_THROTTLED, &tty->flags)) {
842
DBG1("No room in tty, don't read data, don't ack interrupt, "
843
"disable interrupt");
845
/* disable interrupt in downlink... */
846
disable_transmit_dl(index, dc);
851
if (unlikely(size == 0)) {
852
dev_err(&dc->pdev->dev, "size == 0?\n");
858
read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
861
tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
863
} else if (size < RECEIVE_BUF_MAX) {
864
size -= tty_insert_flip_string(tty, (char *) buf, size);
866
i = tty_insert_flip_string(tty, \
867
(char *) buf, RECEIVE_BUF_MAX);
873
set_bit(index, &dc->flip);
880
/* Debug for interrupts */
882
static char *interrupt2str(u16 interrupt)
884
static char buf[TMP_BUF_MAX];
887
interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
888
interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
891
interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
893
interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
896
interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
898
interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
901
interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
904
interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
906
interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
909
interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
911
interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
914
interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
916
interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
919
interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
927
* Receive flow control
928
* Return 1 - If ok, else 0
930
static int receive_flow_control(struct nozomi *dc)
932
enum port_type port = PORT_MDM;
933
struct ctrl_dl ctrl_dl;
934
struct ctrl_dl old_ctrl;
937
read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
939
switch (ctrl_dl.port) {
941
DBG1("The Base Band sends this value as a response to a "
942
"request for IMSI detach sent over the control "
943
"channel uplink (see section 7.6.1).");
951
enable_ier = DIAG_DL;
955
enable_ier = APP1_DL;
959
enable_ier = APP2_DL;
960
if (dc->state == NOZOMI_STATE_ALLOCATED) {
962
* After card initialization the flow control
963
* received for APP2 is always the last
965
dc->state = NOZOMI_STATE_READY;
966
dev_info(&dc->pdev->dev, "Device READY!\n");
970
dev_err(&dc->pdev->dev,
971
"ERROR: flow control received for non-existing port\n");
975
DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
978
old_ctrl = dc->port[port].ctrl_dl;
979
dc->port[port].ctrl_dl = ctrl_dl;
981
if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
982
DBG1("Disable interrupt (0x%04X) on port: %d",
984
disable_transmit_ul(port, dc);
986
} else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
988
if (kfifo_len(&dc->port[port].fifo_ul)) {
989
DBG1("Enable interrupt (0x%04X) on port: %d",
991
DBG1("Data in buffer [%d], enable transmit! ",
992
kfifo_len(&dc->port[port].fifo_ul));
993
enable_transmit_ul(port, dc);
995
DBG1("No data in buffer...");
999
if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
1000
DBG1(" No change in mctrl");
1003
/* Update statistics */
1004
if (old_ctrl.CTS != ctrl_dl.CTS)
1005
dc->port[port].tty_icount.cts++;
1006
if (old_ctrl.DSR != ctrl_dl.DSR)
1007
dc->port[port].tty_icount.dsr++;
1008
if (old_ctrl.RI != ctrl_dl.RI)
1009
dc->port[port].tty_icount.rng++;
1010
if (old_ctrl.DCD != ctrl_dl.DCD)
1011
dc->port[port].tty_icount.dcd++;
1013
wake_up_interruptible(&dc->port[port].tty_wait);
1015
DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
1017
dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
1018
dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
1023
static enum ctrl_port_type port2ctrl(enum port_type port,
1024
const struct nozomi *dc)
1036
dev_err(&dc->pdev->dev,
1037
"ERROR: send flow control " \
1038
"received for non-existing port\n");
1044
* Send flow control, can only update one channel at a time
1045
* Return 0 - If we have updated all flow control
1046
* Return 1 - If we need to update more flow control, ack current enable more
1048
static int send_flow_control(struct nozomi *dc)
1050
u32 i, more_flow_control_to_be_updated = 0;
1053
for (i = PORT_MDM; i < MAX_PORT; i++) {
1054
if (dc->port[i].update_flow_control) {
1055
if (more_flow_control_to_be_updated) {
1056
/* We have more flow control to be updated */
1059
dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1060
ctrl = (u16 *)&dc->port[i].ctrl_ul;
1061
write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1063
dc->port[i].update_flow_control = 0;
1064
more_flow_control_to_be_updated = 1;
1071
* Handle downlink data, ports that are handled are modem and diagnostics
1073
* Return 0 - toggle fields are out of sync
1075
static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1076
u16 read_iir, u16 mask1, u16 mask2)
1078
if (*toggle == 0 && read_iir & mask1) {
1079
if (receive_data(port, dc)) {
1080
writew(mask1, dc->reg_fcr);
1081
*toggle = !(*toggle);
1084
if (read_iir & mask2) {
1085
if (receive_data(port, dc)) {
1086
writew(mask2, dc->reg_fcr);
1087
*toggle = !(*toggle);
1090
} else if (*toggle == 1 && read_iir & mask2) {
1091
if (receive_data(port, dc)) {
1092
writew(mask2, dc->reg_fcr);
1093
*toggle = !(*toggle);
1096
if (read_iir & mask1) {
1097
if (receive_data(port, dc)) {
1098
writew(mask1, dc->reg_fcr);
1099
*toggle = !(*toggle);
1103
dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1111
* Handle uplink data, this is currently for the modem port
1113
* Return 0 - toggle field are out of sync
1115
static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1117
u8 *toggle = &(dc->port[port].toggle_ul);
1119
if (*toggle == 0 && read_iir & MDM_UL1) {
1120
dc->last_ier &= ~MDM_UL;
1121
writew(dc->last_ier, dc->reg_ier);
1122
if (send_data(port, dc)) {
1123
writew(MDM_UL1, dc->reg_fcr);
1124
dc->last_ier = dc->last_ier | MDM_UL;
1125
writew(dc->last_ier, dc->reg_ier);
1129
if (read_iir & MDM_UL2) {
1130
dc->last_ier &= ~MDM_UL;
1131
writew(dc->last_ier, dc->reg_ier);
1132
if (send_data(port, dc)) {
1133
writew(MDM_UL2, dc->reg_fcr);
1134
dc->last_ier = dc->last_ier | MDM_UL;
1135
writew(dc->last_ier, dc->reg_ier);
1140
} else if (*toggle == 1 && read_iir & MDM_UL2) {
1141
dc->last_ier &= ~MDM_UL;
1142
writew(dc->last_ier, dc->reg_ier);
1143
if (send_data(port, dc)) {
1144
writew(MDM_UL2, dc->reg_fcr);
1145
dc->last_ier = dc->last_ier | MDM_UL;
1146
writew(dc->last_ier, dc->reg_ier);
1150
if (read_iir & MDM_UL1) {
1151
dc->last_ier &= ~MDM_UL;
1152
writew(dc->last_ier, dc->reg_ier);
1153
if (send_data(port, dc)) {
1154
writew(MDM_UL1, dc->reg_fcr);
1155
dc->last_ier = dc->last_ier | MDM_UL;
1156
writew(dc->last_ier, dc->reg_ier);
1161
writew(read_iir & MDM_UL, dc->reg_fcr);
1162
dev_err(&dc->pdev->dev, "port out of sync!\n");
1168
static irqreturn_t interrupt_handler(int irq, void *dev_id)
1170
struct nozomi *dc = dev_id;
1177
spin_lock(&dc->spin_mutex);
1178
read_iir = readw(dc->reg_iir);
1181
if (read_iir == (u16)-1)
1184
* Just handle interrupt enabled in IER
1185
* (by masking with dc->last_ier)
1187
read_iir &= dc->last_ier;
1193
DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1196
if (read_iir & RESET) {
1197
if (unlikely(!nozomi_read_config_table(dc))) {
1199
writew(dc->last_ier, dc->reg_ier);
1200
dev_err(&dc->pdev->dev, "Could not read status from "
1201
"card, we should disable interface\n");
1203
writew(RESET, dc->reg_fcr);
1205
/* No more useful info if this was the reset interrupt. */
1208
if (read_iir & CTRL_UL) {
1210
dc->last_ier &= ~CTRL_UL;
1211
writew(dc->last_ier, dc->reg_ier);
1212
if (send_flow_control(dc)) {
1213
writew(CTRL_UL, dc->reg_fcr);
1214
dc->last_ier = dc->last_ier | CTRL_UL;
1215
writew(dc->last_ier, dc->reg_ier);
1218
if (read_iir & CTRL_DL) {
1219
receive_flow_control(dc);
1220
writew(CTRL_DL, dc->reg_fcr);
1222
if (read_iir & MDM_DL) {
1223
if (!handle_data_dl(dc, PORT_MDM,
1224
&(dc->port[PORT_MDM].toggle_dl), read_iir,
1225
MDM_DL1, MDM_DL2)) {
1226
dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1230
if (read_iir & MDM_UL) {
1231
if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1232
dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1236
if (read_iir & DIAG_DL) {
1237
if (!handle_data_dl(dc, PORT_DIAG,
1238
&(dc->port[PORT_DIAG].toggle_dl), read_iir,
1239
DIAG_DL1, DIAG_DL2)) {
1240
dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1244
if (read_iir & DIAG_UL) {
1245
dc->last_ier &= ~DIAG_UL;
1246
writew(dc->last_ier, dc->reg_ier);
1247
if (send_data(PORT_DIAG, dc)) {
1248
writew(DIAG_UL, dc->reg_fcr);
1249
dc->last_ier = dc->last_ier | DIAG_UL;
1250
writew(dc->last_ier, dc->reg_ier);
1253
if (read_iir & APP1_DL) {
1254
if (receive_data(PORT_APP1, dc))
1255
writew(APP1_DL, dc->reg_fcr);
1257
if (read_iir & APP1_UL) {
1258
dc->last_ier &= ~APP1_UL;
1259
writew(dc->last_ier, dc->reg_ier);
1260
if (send_data(PORT_APP1, dc)) {
1261
writew(APP1_UL, dc->reg_fcr);
1262
dc->last_ier = dc->last_ier | APP1_UL;
1263
writew(dc->last_ier, dc->reg_ier);
1266
if (read_iir & APP2_DL) {
1267
if (receive_data(PORT_APP2, dc))
1268
writew(APP2_DL, dc->reg_fcr);
1270
if (read_iir & APP2_UL) {
1271
dc->last_ier &= ~APP2_UL;
1272
writew(dc->last_ier, dc->reg_ier);
1273
if (send_data(PORT_APP2, dc)) {
1274
writew(APP2_UL, dc->reg_fcr);
1275
dc->last_ier = dc->last_ier | APP2_UL;
1276
writew(dc->last_ier, dc->reg_ier);
1281
spin_unlock(&dc->spin_mutex);
1282
for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
1283
struct tty_struct *tty;
1284
if (test_and_clear_bit(a, &dc->flip)) {
1285
tty = tty_port_tty_get(&dc->port[a].port);
1287
tty_flip_buffer_push(tty);
1293
spin_unlock(&dc->spin_mutex);
1297
static void nozomi_get_card_type(struct nozomi *dc)
1302
for (i = 0; i < 6; i++)
1303
size += pci_resource_len(dc->pdev, i);
1305
/* Assume card type F32_8 if no match */
1306
dc->card_type = size == 2048 ? F32_2 : F32_8;
1308
dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1311
static void nozomi_setup_private_data(struct nozomi *dc)
1313
void __iomem *offset = dc->base_addr + dc->card_type / 2;
1316
dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1317
dc->reg_iir = (void __iomem *)(offset + R_IIR);
1318
dc->reg_ier = (void __iomem *)(offset + R_IER);
1322
dc->port[PORT_MDM].token_dl = MDM_DL;
1323
dc->port[PORT_DIAG].token_dl = DIAG_DL;
1324
dc->port[PORT_APP1].token_dl = APP1_DL;
1325
dc->port[PORT_APP2].token_dl = APP2_DL;
1327
for (i = 0; i < MAX_PORT; i++)
1328
init_waitqueue_head(&dc->port[i].tty_wait);
1331
static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1334
const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1336
return sprintf(buf, "%d\n", dc->card_type);
1338
static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
1340
static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1343
const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1345
return sprintf(buf, "%u\n", dc->open_ttys);
1347
static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
1349
static void make_sysfs_files(struct nozomi *dc)
1351
if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1352
dev_err(&dc->pdev->dev,
1353
"Could not create sysfs file for card_type\n");
1354
if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1355
dev_err(&dc->pdev->dev,
1356
"Could not create sysfs file for open_ttys\n");
1359
static void remove_sysfs_files(struct nozomi *dc)
1361
device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1362
device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1365
/* Allocate memory for one device */
1366
static int __devinit nozomi_card_init(struct pci_dev *pdev,
1367
const struct pci_device_id *ent)
1369
resource_size_t start;
1371
struct nozomi *dc = NULL;
1375
dev_dbg(&pdev->dev, "Init, new card found\n");
1377
for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1378
if (!ndevs[ndev_idx])
1381
if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1382
dev_err(&pdev->dev, "no free tty range for this card left\n");
1387
dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1388
if (unlikely(!dc)) {
1389
dev_err(&pdev->dev, "Could not allocate memory\n");
1396
ret = pci_enable_device(dc->pdev);
1398
dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1402
ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1404
dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1405
(int) /* nozomi_private.io_addr */ 0);
1406
goto err_disable_device;
1409
start = pci_resource_start(dc->pdev, 0);
1411
dev_err(&pdev->dev, "No I/O address for card detected\n");
1416
/* Find out what card type it is */
1417
nozomi_get_card_type(dc);
1419
dc->base_addr = ioremap_nocache(start, dc->card_type);
1420
if (!dc->base_addr) {
1421
dev_err(&pdev->dev, "Unable to map card MMIO\n");
1426
dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1427
if (!dc->send_buf) {
1428
dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1433
for (i = PORT_MDM; i < MAX_PORT; i++) {
1434
if (kfifo_alloc(&dc->port[i].fifo_ul,
1435
FIFO_BUFFER_SIZE_UL, GFP_ATOMIC)) {
1437
"Could not allocate kfifo buffer\n");
1439
goto err_free_kfifo;
1443
spin_lock_init(&dc->spin_mutex);
1445
nozomi_setup_private_data(dc);
1447
/* Disable all interrupts */
1449
writew(dc->last_ier, dc->reg_ier);
1451
ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1453
if (unlikely(ret)) {
1454
dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1455
goto err_free_kfifo;
1458
DBG1("base_addr: %p", dc->base_addr);
1460
make_sysfs_files(dc);
1462
dc->index_start = ndev_idx * MAX_PORT;
1463
ndevs[ndev_idx] = dc;
1465
pci_set_drvdata(pdev, dc);
1467
/* Enable RESET interrupt */
1468
dc->last_ier = RESET;
1469
iowrite16(dc->last_ier, dc->reg_ier);
1471
dc->state = NOZOMI_STATE_ENABLED;
1473
for (i = 0; i < MAX_PORT; i++) {
1474
struct device *tty_dev;
1475
struct port *port = &dc->port[i];
1477
mutex_init(&port->tty_sem);
1478
tty_port_init(&port->port);
1479
port->port.ops = &noz_tty_port_ops;
1480
tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
1483
if (IS_ERR(tty_dev)) {
1484
ret = PTR_ERR(tty_dev);
1485
dev_err(&pdev->dev, "Could not allocate tty?\n");
1493
for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1494
tty_unregister_device(ntty_driver, i);
1496
for (i = 0; i < MAX_PORT; i++)
1497
kfifo_free(&dc->port[i].fifo_ul);
1499
kfree(dc->send_buf);
1500
iounmap(dc->base_addr);
1502
pci_release_regions(pdev);
1504
pci_disable_device(pdev);
1511
static void __devexit tty_exit(struct nozomi *dc)
1517
for (i = 0; i < MAX_PORT; ++i) {
1518
struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
1519
if (tty && list_empty(&tty->hangup_work.entry))
1523
/* Racy below - surely should wait for scheduled work to be done or
1524
complete off a hangup method ? */
1525
while (dc->open_ttys)
1527
for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1528
tty_unregister_device(ntty_driver, i);
1531
/* Deallocate memory for one device */
1532
static void __devexit nozomi_card_exit(struct pci_dev *pdev)
1535
struct ctrl_ul ctrl;
1536
struct nozomi *dc = pci_get_drvdata(pdev);
1538
/* Disable all interrupts */
1540
writew(dc->last_ier, dc->reg_ier);
1544
/* Send 0x0001, command card to resend the reset token. */
1545
/* This is to get the reset when the module is reloaded. */
1550
DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1552
/* Setup dc->reg addresses to we can use defines here */
1553
write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1554
writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
1556
remove_sysfs_files(dc);
1558
free_irq(pdev->irq, dc);
1560
for (i = 0; i < MAX_PORT; i++)
1561
kfifo_free(&dc->port[i].fifo_ul);
1563
kfree(dc->send_buf);
1565
iounmap(dc->base_addr);
1567
pci_release_regions(pdev);
1569
pci_disable_device(pdev);
1571
ndevs[dc->index_start / MAX_PORT] = NULL;
1576
static void set_rts(const struct tty_struct *tty, int rts)
1578
struct port *port = get_port_by_tty(tty);
1580
port->ctrl_ul.RTS = rts;
1581
port->update_flow_control = 1;
1582
enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1585
static void set_dtr(const struct tty_struct *tty, int dtr)
1587
struct port *port = get_port_by_tty(tty);
1589
DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1591
port->ctrl_ul.DTR = dtr;
1592
port->update_flow_control = 1;
1593
enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1597
* ----------------------------------------------------------------------------
1599
* ----------------------------------------------------------------------------
1602
static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
1604
struct port *port = get_port_by_tty(tty);
1605
struct nozomi *dc = get_dc_by_tty(tty);
1607
if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1609
ret = tty_init_termios(tty);
1611
tty_driver_kref_get(driver);
1613
tty->driver_data = port;
1614
driver->ttys[tty->index] = tty;
1619
static void ntty_cleanup(struct tty_struct *tty)
1621
tty->driver_data = NULL;
1624
static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
1626
struct port *port = container_of(tport, struct port, port);
1627
struct nozomi *dc = port->dc;
1628
unsigned long flags;
1630
DBG1("open: %d", port->token_dl);
1631
spin_lock_irqsave(&dc->spin_mutex, flags);
1632
dc->last_ier = dc->last_ier | port->token_dl;
1633
writew(dc->last_ier, dc->reg_ier);
1635
spin_unlock_irqrestore(&dc->spin_mutex, flags);
1636
printk("noz: activated %d: %p\n", tty->index, tport);
1640
static int ntty_open(struct tty_struct *tty, struct file *filp)
1642
struct port *port = tty->driver_data;
1643
return tty_port_open(&port->port, tty, filp);
1646
static void ntty_shutdown(struct tty_port *tport)
1648
struct port *port = container_of(tport, struct port, port);
1649
struct nozomi *dc = port->dc;
1650
unsigned long flags;
1652
DBG1("close: %d", port->token_dl);
1653
spin_lock_irqsave(&dc->spin_mutex, flags);
1654
dc->last_ier &= ~(port->token_dl);
1655
writew(dc->last_ier, dc->reg_ier);
1657
spin_unlock_irqrestore(&dc->spin_mutex, flags);
1658
printk("noz: shutdown %p\n", tport);
1661
static void ntty_close(struct tty_struct *tty, struct file *filp)
1663
struct port *port = tty->driver_data;
1665
tty_port_close(&port->port, tty, filp);
1668
static void ntty_hangup(struct tty_struct *tty)
1670
struct port *port = tty->driver_data;
1671
tty_port_hangup(&port->port);
1675
* called when the userspace process writes to the tty (/dev/noz*).
1676
* Data is inserted into a fifo, which is then read and transferred to the modem.
1678
static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1682
struct nozomi *dc = get_dc_by_tty(tty);
1683
struct port *port = tty->driver_data;
1684
unsigned long flags;
1686
/* DBG1( "WRITEx: %d, index = %d", count, index); */
1691
mutex_lock(&port->tty_sem);
1693
if (unlikely(!port->port.count)) {
1698
rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
1701
if (unlikely(dc == NULL)) {
1702
DBG1("No device context?");
1706
spin_lock_irqsave(&dc->spin_mutex, flags);
1707
/* CTS is only valid on the modem channel */
1708
if (port == &(dc->port[PORT_MDM])) {
1709
if (port->ctrl_dl.CTS) {
1710
DBG4("Enable interrupt");
1711
enable_transmit_ul(tty->index % MAX_PORT, dc);
1713
dev_err(&dc->pdev->dev,
1714
"CTS not active on modem port?\n");
1717
enable_transmit_ul(tty->index % MAX_PORT, dc);
1719
spin_unlock_irqrestore(&dc->spin_mutex, flags);
1722
mutex_unlock(&port->tty_sem);
1727
* Calculate how much is left in device
1728
* This method is called by the upper tty layer.
1729
* #according to sources N_TTY.c it expects a value >= 0 and
1730
* does not check for negative values.
1732
* If the port is unplugged report lots of room and let the bits
1733
* dribble away so we don't block anything.
1735
static int ntty_write_room(struct tty_struct *tty)
1737
struct port *port = tty->driver_data;
1739
const struct nozomi *dc = get_dc_by_tty(tty);
1742
mutex_lock(&port->tty_sem);
1743
if (port->port.count)
1744
room = kfifo_avail(&port->fifo_ul);
1745
mutex_unlock(&port->tty_sem);
1750
/* Gets io control parameters */
1751
static int ntty_tiocmget(struct tty_struct *tty)
1753
const struct port *port = tty->driver_data;
1754
const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1755
const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1757
/* Note: these could change under us but it is not clear this
1759
return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1760
(ctrl_ul->DTR ? TIOCM_DTR : 0) |
1761
(ctrl_dl->DCD ? TIOCM_CAR : 0) |
1762
(ctrl_dl->RI ? TIOCM_RNG : 0) |
1763
(ctrl_dl->DSR ? TIOCM_DSR : 0) |
1764
(ctrl_dl->CTS ? TIOCM_CTS : 0);
1767
/* Sets io controls parameters */
1768
static int ntty_tiocmset(struct tty_struct *tty,
1769
unsigned int set, unsigned int clear)
1771
struct nozomi *dc = get_dc_by_tty(tty);
1772
unsigned long flags;
1774
spin_lock_irqsave(&dc->spin_mutex, flags);
1775
if (set & TIOCM_RTS)
1777
else if (clear & TIOCM_RTS)
1780
if (set & TIOCM_DTR)
1782
else if (clear & TIOCM_DTR)
1784
spin_unlock_irqrestore(&dc->spin_mutex, flags);
1789
static int ntty_cflags_changed(struct port *port, unsigned long flags,
1790
struct async_icount *cprev)
1792
const struct async_icount cnow = port->tty_icount;
1795
ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1796
((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1797
((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1798
((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1805
static int ntty_tiocgicount(struct tty_struct *tty,
1806
struct serial_icounter_struct *icount)
1808
struct port *port = tty->driver_data;
1809
const struct async_icount cnow = port->tty_icount;
1811
icount->cts = cnow.cts;
1812
icount->dsr = cnow.dsr;
1813
icount->rng = cnow.rng;
1814
icount->dcd = cnow.dcd;
1815
icount->rx = cnow.rx;
1816
icount->tx = cnow.tx;
1817
icount->frame = cnow.frame;
1818
icount->overrun = cnow.overrun;
1819
icount->parity = cnow.parity;
1820
icount->brk = cnow.brk;
1821
icount->buf_overrun = cnow.buf_overrun;
1825
static int ntty_ioctl(struct tty_struct *tty,
1826
unsigned int cmd, unsigned long arg)
1828
struct port *port = tty->driver_data;
1829
int rval = -ENOIOCTLCMD;
1831
DBG1("******** IOCTL, cmd: %d", cmd);
1835
struct async_icount cprev = port->tty_icount;
1837
rval = wait_event_interruptible(port->tty_wait,
1838
ntty_cflags_changed(port, arg, &cprev));
1842
DBG1("ERR: 0x%08X, %d", cmd, cmd);
1850
* Called by the upper tty layer when tty buffers are ready
1851
* to receive data again after a call to throttle.
1853
static void ntty_unthrottle(struct tty_struct *tty)
1855
struct nozomi *dc = get_dc_by_tty(tty);
1856
unsigned long flags;
1859
spin_lock_irqsave(&dc->spin_mutex, flags);
1860
enable_transmit_dl(tty->index % MAX_PORT, dc);
1863
spin_unlock_irqrestore(&dc->spin_mutex, flags);
1867
* Called by the upper tty layer when the tty buffers are almost full.
1868
* The driver should stop send more data.
1870
static void ntty_throttle(struct tty_struct *tty)
1872
struct nozomi *dc = get_dc_by_tty(tty);
1873
unsigned long flags;
1876
spin_lock_irqsave(&dc->spin_mutex, flags);
1878
spin_unlock_irqrestore(&dc->spin_mutex, flags);
1881
/* Returns number of chars in buffer, called by tty layer */
1882
static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1884
struct port *port = tty->driver_data;
1885
struct nozomi *dc = get_dc_by_tty(tty);
1888
if (unlikely(!dc || !port)) {
1889
goto exit_in_buffer;
1892
if (unlikely(!port->port.count)) {
1893
dev_err(&dc->pdev->dev, "No tty open?\n");
1894
goto exit_in_buffer;
1897
rval = kfifo_len(&port->fifo_ul);
1903
static const struct tty_port_operations noz_tty_port_ops = {
1904
.activate = ntty_activate,
1905
.shutdown = ntty_shutdown,
1908
static const struct tty_operations tty_ops = {
1909
.ioctl = ntty_ioctl,
1911
.close = ntty_close,
1912
.hangup = ntty_hangup,
1913
.write = ntty_write,
1914
.write_room = ntty_write_room,
1915
.unthrottle = ntty_unthrottle,
1916
.throttle = ntty_throttle,
1917
.chars_in_buffer = ntty_chars_in_buffer,
1918
.tiocmget = ntty_tiocmget,
1919
.tiocmset = ntty_tiocmset,
1920
.get_icount = ntty_tiocgicount,
1921
.install = ntty_install,
1922
.cleanup = ntty_cleanup,
1925
/* Module initialization */
1926
static struct pci_driver nozomi_driver = {
1927
.name = NOZOMI_NAME,
1928
.id_table = nozomi_pci_tbl,
1929
.probe = nozomi_card_init,
1930
.remove = __devexit_p(nozomi_card_exit),
1933
static __init int nozomi_init(void)
1937
printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1939
ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1943
ntty_driver->owner = THIS_MODULE;
1944
ntty_driver->driver_name = NOZOMI_NAME_TTY;
1945
ntty_driver->name = "noz";
1946
ntty_driver->major = 0;
1947
ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1948
ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1949
ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1950
ntty_driver->init_termios = tty_std_termios;
1951
ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1953
ntty_driver->init_termios.c_ispeed = 115200;
1954
ntty_driver->init_termios.c_ospeed = 115200;
1955
tty_set_operations(ntty_driver, &tty_ops);
1957
ret = tty_register_driver(ntty_driver);
1959
printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1963
ret = pci_register_driver(&nozomi_driver);
1965
printk(KERN_ERR "Nozomi: can't register pci driver\n");
1971
tty_unregister_driver(ntty_driver);
1973
put_tty_driver(ntty_driver);
1977
static __exit void nozomi_exit(void)
1979
printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1980
pci_unregister_driver(&nozomi_driver);
1981
tty_unregister_driver(ntty_driver);
1982
put_tty_driver(ntty_driver);
1985
module_init(nozomi_init);
1986
module_exit(nozomi_exit);
1988
module_param(debug, int, S_IRUGO | S_IWUSR);
1990
MODULE_LICENSE("Dual BSD/GPL");
1991
MODULE_DESCRIPTION(DRIVER_DESC);
added
removed
drivers/tty/nozomi.c
