1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
5 * Written by: Ulf Jakobsson,
9 * Maintained by: Paul Hardwick (p.hardwick@option.com)
12 * Locking code changes for Vodafone by Sphere Systems Ltd,
13 * Andrew Bird (ajb@spheresystems.co.uk )
16 * Source has been ported from an implementation made by Filip Aben @ Option
18 * --------------------------------------------------------------------------
20 * Copyright (c) 2005,2006 Option Wireless Sweden AB
21 * Copyright (c) 2006 Sphere Systems Ltd
22 * Copyright (c) 2006 Option Wireless n/v
23 * All rights Reserved.
25 * --------------------------------------------------------------------------
28 /* Enable this to have a lot of debug printouts */
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/pci.h>
34 #include <linux/ioport.h>
35 #include <linux/tty.h>
36 #include <linux/tty_driver.h>
37 #include <linux/tty_flip.h>
38 #include <linux/sched.h>
39 #include <linux/serial.h>
40 #include <linux/interrupt.h>
41 #include <linux/kmod.h>
42 #include <linux/init.h>
43 #include <linux/kfifo.h>
44 #include <linux/uaccess.h>
45 #include <linux/slab.h>
46 #include <asm/byteorder.h>
48 #include <linux/delay.h>
51 #define VERSION_STRING DRIVER_DESC " 2.1d"
53 /* Default debug printout level */
54 #define NOZOMI_DEBUG_LEVEL 0x00
55 static int debug
= NOZOMI_DEBUG_LEVEL
;
56 module_param(debug
, int, S_IRUGO
| S_IWUSR
);
58 /* Macros definitions */
59 #define DBG_(lvl, fmt, args...) \
62 pr_debug("[%d] %s(): " fmt "\n", \
63 __LINE__, __func__, ##args); \
66 #define DBG1(args...) DBG_(0x01, ##args)
67 #define DBG2(args...) DBG_(0x02, ##args)
68 #define DBG3(args...) DBG_(0x04, ##args)
69 #define DBG4(args...) DBG_(0x08, ##args)
71 /* TODO: rewrite to optimize macros... */
73 #define TMP_BUF_MAX 256
75 #define DUMP(buf__,len__) \
77 char tbuf[TMP_BUF_MAX] = {0};\
79 snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
80 if (tbuf[len__-2] == '\r') {\
83 DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
85 DBG1("SENDING: '%s' (%d)", tbuf, len__);\
90 #define NOZOMI_NAME "nozomi"
91 #define NOZOMI_NAME_TTY "nozomi_tty"
92 #define DRIVER_DESC "Nozomi driver"
94 #define NTTY_TTY_MAXMINORS 256
95 #define NTTY_FIFO_BUFFER_SIZE 8192
97 /* Must be power of 2 */
98 #define FIFO_BUFFER_SIZE_UL 8192
100 /* Size of tmp send buffer to card */
101 #define SEND_BUF_MAX 1024
102 #define RECEIVE_BUF_MAX 4
105 #define R_IIR 0x0000 /* Interrupt Identity Register */
106 #define R_FCR 0x0000 /* Flow Control Register */
107 #define R_IER 0x0004 /* Interrupt Enable Register */
109 #define NOZOMI_CONFIG_MAGIC 0xEFEFFEFE
110 #define TOGGLE_VALID 0x0000
112 /* Definition of interrupt tokens */
113 #define MDM_DL1 0x0001
114 #define MDM_UL1 0x0002
115 #define MDM_DL2 0x0004
116 #define MDM_UL2 0x0008
117 #define DIAG_DL1 0x0010
118 #define DIAG_DL2 0x0020
119 #define DIAG_UL 0x0040
120 #define APP1_DL 0x0080
121 #define APP1_UL 0x0100
122 #define APP2_DL 0x0200
123 #define APP2_UL 0x0400
124 #define CTRL_DL 0x0800
125 #define CTRL_UL 0x1000
128 #define MDM_DL (MDM_DL1 | MDM_DL2)
129 #define MDM_UL (MDM_UL1 | MDM_UL2)
130 #define DIAG_DL (DIAG_DL1 | DIAG_DL2)
132 /* modem signal definition */
133 #define CTRL_DSR 0x0001
134 #define CTRL_DCD 0x0002
135 #define CTRL_RI 0x0004
136 #define CTRL_CTS 0x0008
138 #define CTRL_DTR 0x0001
139 #define CTRL_RTS 0x0002
142 #define NOZOMI_MAX_PORTS 5
143 #define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
145 /* Type definitions */
148 * There are two types of nozomi cards,
149 * one with 2048 memory and with 8192 memory
152 F32_2
= 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
153 F32_8
= 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
156 /* Initialization states a card can be in */
158 NOZOMI_STATE_UKNOWN
= 0,
159 NOZOMI_STATE_ENABLED
= 1, /* pci device enabled */
160 NOZOMI_STATE_ALLOCATED
= 2, /* config setup done */
161 NOZOMI_STATE_READY
= 3, /* flowcontrols received */
164 /* Two different toggle channels exist */
170 /* Port definition for the card regarding flow control */
171 enum ctrl_port_type
{
180 /* Ports that the nozomi has */
194 unsigned int enabled
:5; /*
195 * Toggle fields are valid if enabled is 0,
196 * else A-channels must always be used.
198 unsigned int diag_dl
:1;
199 unsigned int mdm_dl
:1;
200 unsigned int mdm_ul
:1;
201 } __attribute__ ((packed
));
203 /* Configuration table to read at startup of card */
204 /* Is for now only needed during initialization phase */
205 struct config_table
{
207 u16 product_information
;
210 struct toggles toggle
;
213 * If this is 64, it can hold
214 * 60 bytes + 4 that is length field
220 * If this is 64, it can hold
221 * 60 bytes + 4 that is length field
236 } __attribute__ ((packed
));
238 /* This stores all control downlink flags */
241 unsigned int reserved
:4;
246 } __attribute__ ((packed
));
248 /* This stores all control uplink flags */
251 unsigned int reserved
:6;
254 } __attribute__ ((packed
));
259 /* This represents the toggle information */
261 unsigned int mdm_ul
:1;
262 unsigned int mdm_dl
:1;
263 unsigned int diag_dl
:1;
264 unsigned int enabled
:5; /*
265 * Toggle fields are valid if enabled is 0,
266 * else A-channels must always be used.
268 } __attribute__ ((packed
));
270 /* Configuration table to read at startup of card */
271 struct config_table
{
274 u16 product_information
;
275 struct toggles toggle
;
279 * If this is 64, it can hold
280 * 60 bytes + 4 that is length field
296 } __attribute__ ((packed
));
298 /* This stores all control downlink flags */
304 unsigned int reserverd
:4;
306 } __attribute__ ((packed
));
308 /* This stores all control uplink flags */
312 unsigned int reserved
:6;
314 } __attribute__ ((packed
));
317 /* This holds all information that is needed regarding a port */
319 struct tty_port port
;
320 u8 update_flow_control
;
321 struct ctrl_ul ctrl_ul
;
322 struct ctrl_dl ctrl_dl
;
323 struct kfifo fifo_ul
;
324 void __iomem
*dl_addr
[2];
327 void __iomem
*ul_addr
[2];
332 wait_queue_head_t tty_wait
;
333 struct async_icount tty_icount
;
338 /* Private data one for each card in the system */
340 void __iomem
*base_addr
;
343 /* Pointers to registers */
344 void __iomem
*reg_iir
;
345 void __iomem
*reg_fcr
;
346 void __iomem
*reg_ier
;
349 enum card_type card_type
;
350 struct config_table config_table
; /* Configuration table */
351 struct pci_dev
*pdev
;
352 struct port port
[NOZOMI_MAX_PORTS
];
355 spinlock_t spin_mutex
; /* secures access to registers and tty */
357 unsigned int index_start
;
358 enum card_state state
;
362 /* This is a data packet that is read or written to/from card */
364 u32 size
; /* size is the length of the data buffer */
366 } __attribute__ ((packed
));
368 /* Global variables */
369 static const struct pci_device_id nozomi_pci_tbl
[] = {
370 {PCI_DEVICE(0x1931, 0x000c)}, /* Nozomi HSDPA */
374 MODULE_DEVICE_TABLE(pci
, nozomi_pci_tbl
);
376 static struct nozomi
*ndevs
[NOZOMI_MAX_CARDS
];
377 static struct tty_driver
*ntty_driver
;
379 static const struct tty_port_operations noz_tty_port_ops
;
382 * find card by tty_index
384 static inline struct nozomi
*get_dc_by_tty(const struct tty_struct
*tty
)
386 return tty
? ndevs
[tty
->index
/ MAX_PORT
] : NULL
;
389 static inline struct port
*get_port_by_tty(const struct tty_struct
*tty
)
391 struct nozomi
*ndev
= get_dc_by_tty(tty
);
392 return ndev
? &ndev
->port
[tty
->index
% MAX_PORT
] : NULL
;
401 static void read_mem32(u32
*buf
, const void __iomem
*mem_addr_start
,
405 const u32 __iomem
*ptr
= mem_addr_start
;
408 if (unlikely(!ptr
|| !buf
))
411 /* shortcut for extremely often used cases */
412 switch (size_bytes
) {
413 case 2: /* 2 bytes */
415 *buf16
= __le16_to_cpu(readw(ptr
));
418 case 4: /* 4 bytes */
419 *(buf
) = __le32_to_cpu(readl(ptr
));
424 while (i
< size_bytes
) {
425 if (size_bytes
- i
== 2) {
426 /* Handle 2 bytes in the end */
428 *(buf16
) = __le16_to_cpu(readw(ptr
));
432 *(buf
) = __le32_to_cpu(readl(ptr
));
447 static u32
write_mem32(void __iomem
*mem_addr_start
, const u32
*buf
,
451 u32 __iomem
*ptr
= mem_addr_start
;
454 if (unlikely(!ptr
|| !buf
))
457 /* shortcut for extremely often used cases */
458 switch (size_bytes
) {
459 case 2: /* 2 bytes */
460 buf16
= (const u16
*)buf
;
461 writew(__cpu_to_le16(*buf16
), ptr
);
465 * also needs to write 4 bytes in this case
466 * so falling through..
468 case 4: /* 4 bytes */
469 writel(__cpu_to_le32(*buf
), ptr
);
474 while (i
< size_bytes
) {
475 if (size_bytes
- i
== 2) {
477 buf16
= (const u16
*)buf
;
478 writew(__cpu_to_le16(*buf16
), ptr
);
482 writel(__cpu_to_le32(*buf
), ptr
);
491 /* Setup pointers to different channels and also setup buffer sizes. */
492 static void nozomi_setup_memory(struct nozomi
*dc
)
494 void __iomem
*offset
= dc
->base_addr
+ dc
->config_table
.dl_start
;
495 /* The length reported is including the length field of 4 bytes,
496 * hence subtract with 4.
498 const u16 buff_offset
= 4;
500 /* Modem port dl configuration */
501 dc
->port
[PORT_MDM
].dl_addr
[CH_A
] = offset
;
502 dc
->port
[PORT_MDM
].dl_addr
[CH_B
] =
503 (offset
+= dc
->config_table
.dl_mdm_len1
);
504 dc
->port
[PORT_MDM
].dl_size
[CH_A
] =
505 dc
->config_table
.dl_mdm_len1
- buff_offset
;
506 dc
->port
[PORT_MDM
].dl_size
[CH_B
] =
507 dc
->config_table
.dl_mdm_len2
- buff_offset
;
509 /* Diag port dl configuration */
510 dc
->port
[PORT_DIAG
].dl_addr
[CH_A
] =
511 (offset
+= dc
->config_table
.dl_mdm_len2
);
512 dc
->port
[PORT_DIAG
].dl_size
[CH_A
] =
513 dc
->config_table
.dl_diag_len1
- buff_offset
;
514 dc
->port
[PORT_DIAG
].dl_addr
[CH_B
] =
515 (offset
+= dc
->config_table
.dl_diag_len1
);
516 dc
->port
[PORT_DIAG
].dl_size
[CH_B
] =
517 dc
->config_table
.dl_diag_len2
- buff_offset
;
519 /* App1 port dl configuration */
520 dc
->port
[PORT_APP1
].dl_addr
[CH_A
] =
521 (offset
+= dc
->config_table
.dl_diag_len2
);
522 dc
->port
[PORT_APP1
].dl_size
[CH_A
] =
523 dc
->config_table
.dl_app1_len
- buff_offset
;
525 /* App2 port dl configuration */
526 dc
->port
[PORT_APP2
].dl_addr
[CH_A
] =
527 (offset
+= dc
->config_table
.dl_app1_len
);
528 dc
->port
[PORT_APP2
].dl_size
[CH_A
] =
529 dc
->config_table
.dl_app2_len
- buff_offset
;
531 /* Ctrl dl configuration */
532 dc
->port
[PORT_CTRL
].dl_addr
[CH_A
] =
533 (offset
+= dc
->config_table
.dl_app2_len
);
534 dc
->port
[PORT_CTRL
].dl_size
[CH_A
] =
535 dc
->config_table
.dl_ctrl_len
- buff_offset
;
537 offset
= dc
->base_addr
+ dc
->config_table
.ul_start
;
539 /* Modem Port ul configuration */
540 dc
->port
[PORT_MDM
].ul_addr
[CH_A
] = offset
;
541 dc
->port
[PORT_MDM
].ul_size
[CH_A
] =
542 dc
->config_table
.ul_mdm_len1
- buff_offset
;
543 dc
->port
[PORT_MDM
].ul_addr
[CH_B
] =
544 (offset
+= dc
->config_table
.ul_mdm_len1
);
545 dc
->port
[PORT_MDM
].ul_size
[CH_B
] =
546 dc
->config_table
.ul_mdm_len2
- buff_offset
;
548 /* Diag port ul configuration */
549 dc
->port
[PORT_DIAG
].ul_addr
[CH_A
] =
550 (offset
+= dc
->config_table
.ul_mdm_len2
);
551 dc
->port
[PORT_DIAG
].ul_size
[CH_A
] =
552 dc
->config_table
.ul_diag_len
- buff_offset
;
554 /* App1 port ul configuration */
555 dc
->port
[PORT_APP1
].ul_addr
[CH_A
] =
556 (offset
+= dc
->config_table
.ul_diag_len
);
557 dc
->port
[PORT_APP1
].ul_size
[CH_A
] =
558 dc
->config_table
.ul_app1_len
- buff_offset
;
560 /* App2 port ul configuration */
561 dc
->port
[PORT_APP2
].ul_addr
[CH_A
] =
562 (offset
+= dc
->config_table
.ul_app1_len
);
563 dc
->port
[PORT_APP2
].ul_size
[CH_A
] =
564 dc
->config_table
.ul_app2_len
- buff_offset
;
566 /* Ctrl ul configuration */
567 dc
->port
[PORT_CTRL
].ul_addr
[CH_A
] =
568 (offset
+= dc
->config_table
.ul_app2_len
);
569 dc
->port
[PORT_CTRL
].ul_size
[CH_A
] =
570 dc
->config_table
.ul_ctrl_len
- buff_offset
;
573 /* Dump config table under initalization phase */
575 static void dump_table(const struct nozomi
*dc
)
577 DBG3("signature: 0x%08X", dc
->config_table
.signature
);
578 DBG3("version: 0x%04X", dc
->config_table
.version
);
579 DBG3("product_information: 0x%04X", \
580 dc
->config_table
.product_information
);
581 DBG3("toggle enabled: %d", dc
->config_table
.toggle
.enabled
);
582 DBG3("toggle up_mdm: %d", dc
->config_table
.toggle
.mdm_ul
);
583 DBG3("toggle dl_mdm: %d", dc
->config_table
.toggle
.mdm_dl
);
584 DBG3("toggle dl_dbg: %d", dc
->config_table
.toggle
.diag_dl
);
586 DBG3("dl_start: 0x%04X", dc
->config_table
.dl_start
);
587 DBG3("dl_mdm_len0: 0x%04X, %d", dc
->config_table
.dl_mdm_len1
,
588 dc
->config_table
.dl_mdm_len1
);
589 DBG3("dl_mdm_len1: 0x%04X, %d", dc
->config_table
.dl_mdm_len2
,
590 dc
->config_table
.dl_mdm_len2
);
591 DBG3("dl_diag_len0: 0x%04X, %d", dc
->config_table
.dl_diag_len1
,
592 dc
->config_table
.dl_diag_len1
);
593 DBG3("dl_diag_len1: 0x%04X, %d", dc
->config_table
.dl_diag_len2
,
594 dc
->config_table
.dl_diag_len2
);
595 DBG3("dl_app1_len: 0x%04X, %d", dc
->config_table
.dl_app1_len
,
596 dc
->config_table
.dl_app1_len
);
597 DBG3("dl_app2_len: 0x%04X, %d", dc
->config_table
.dl_app2_len
,
598 dc
->config_table
.dl_app2_len
);
599 DBG3("dl_ctrl_len: 0x%04X, %d", dc
->config_table
.dl_ctrl_len
,
600 dc
->config_table
.dl_ctrl_len
);
601 DBG3("ul_start: 0x%04X, %d", dc
->config_table
.ul_start
,
602 dc
->config_table
.ul_start
);
603 DBG3("ul_mdm_len[0]: 0x%04X, %d", dc
->config_table
.ul_mdm_len1
,
604 dc
->config_table
.ul_mdm_len1
);
605 DBG3("ul_mdm_len[1]: 0x%04X, %d", dc
->config_table
.ul_mdm_len2
,
606 dc
->config_table
.ul_mdm_len2
);
607 DBG3("ul_diag_len: 0x%04X, %d", dc
->config_table
.ul_diag_len
,
608 dc
->config_table
.ul_diag_len
);
609 DBG3("ul_app1_len: 0x%04X, %d", dc
->config_table
.ul_app1_len
,
610 dc
->config_table
.ul_app1_len
);
611 DBG3("ul_app2_len: 0x%04X, %d", dc
->config_table
.ul_app2_len
,
612 dc
->config_table
.ul_app2_len
);
613 DBG3("ul_ctrl_len: 0x%04X, %d", dc
->config_table
.ul_ctrl_len
,
614 dc
->config_table
.ul_ctrl_len
);
617 static inline void dump_table(const struct nozomi
*dc
) { }
621 * Read configuration table from card under intalization phase
622 * Returns 1 if ok, else 0
624 static int nozomi_read_config_table(struct nozomi
*dc
)
626 read_mem32((u32
*) &dc
->config_table
, dc
->base_addr
+ 0,
627 sizeof(struct config_table
));
629 if (dc
->config_table
.signature
!= NOZOMI_CONFIG_MAGIC
) {
630 dev_err(&dc
->pdev
->dev
, "ConfigTable Bad! 0x%08X != 0x%08X\n",
631 dc
->config_table
.signature
, NOZOMI_CONFIG_MAGIC
);
635 if ((dc
->config_table
.version
== 0)
636 || (dc
->config_table
.toggle
.enabled
== TOGGLE_VALID
)) {
638 DBG1("Second phase, configuring card");
640 nozomi_setup_memory(dc
);
642 dc
->port
[PORT_MDM
].toggle_ul
= dc
->config_table
.toggle
.mdm_ul
;
643 dc
->port
[PORT_MDM
].toggle_dl
= dc
->config_table
.toggle
.mdm_dl
;
644 dc
->port
[PORT_DIAG
].toggle_dl
= dc
->config_table
.toggle
.diag_dl
;
645 DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
646 dc
->port
[PORT_MDM
].toggle_ul
,
647 dc
->port
[PORT_MDM
].toggle_dl
, dc
->port
[PORT_DIAG
].toggle_dl
);
651 for (i
= PORT_MDM
; i
< MAX_PORT
; i
++) {
652 memset(&dc
->port
[i
].ctrl_dl
, 0, sizeof(struct ctrl_dl
));
653 memset(&dc
->port
[i
].ctrl_ul
, 0, sizeof(struct ctrl_ul
));
656 /* Enable control channel */
657 dc
->last_ier
= dc
->last_ier
| CTRL_DL
;
658 writew(dc
->last_ier
, dc
->reg_ier
);
660 dc
->state
= NOZOMI_STATE_ALLOCATED
;
661 dev_info(&dc
->pdev
->dev
, "Initialization OK!\n");
665 if ((dc
->config_table
.version
> 0)
666 && (dc
->config_table
.toggle
.enabled
!= TOGGLE_VALID
)) {
668 DBG1("First phase: pushing upload buffers, clearing download");
670 dev_info(&dc
->pdev
->dev
, "Version of card: %d\n",
671 dc
->config_table
.version
);
673 /* Here we should disable all I/O over F32. */
674 nozomi_setup_memory(dc
);
677 * We should send ALL channel pair tokens back along
681 /* push upload modem buffers */
682 write_mem32(dc
->port
[PORT_MDM
].ul_addr
[CH_A
],
684 write_mem32(dc
->port
[PORT_MDM
].ul_addr
[CH_B
],
687 writew(MDM_UL
| DIAG_DL
| MDM_DL
, dc
->reg_fcr
);
689 DBG1("First phase done");
695 /* Enable uplink interrupts */
696 static void enable_transmit_ul(enum port_type port
, struct nozomi
*dc
)
698 static const u16 mask
[] = {MDM_UL
, DIAG_UL
, APP1_UL
, APP2_UL
, CTRL_UL
};
700 if (port
< NOZOMI_MAX_PORTS
) {
701 dc
->last_ier
|= mask
[port
];
702 writew(dc
->last_ier
, dc
->reg_ier
);
704 dev_err(&dc
->pdev
->dev
, "Called with wrong port?\n");
708 /* Disable uplink interrupts */
709 static void disable_transmit_ul(enum port_type port
, struct nozomi
*dc
)
711 static const u16 mask
[] =
712 {~MDM_UL
, ~DIAG_UL
, ~APP1_UL
, ~APP2_UL
, ~CTRL_UL
};
714 if (port
< NOZOMI_MAX_PORTS
) {
715 dc
->last_ier
&= mask
[port
];
716 writew(dc
->last_ier
, dc
->reg_ier
);
718 dev_err(&dc
->pdev
->dev
, "Called with wrong port?\n");
722 /* Enable downlink interrupts */
723 static void enable_transmit_dl(enum port_type port
, struct nozomi
*dc
)
725 static const u16 mask
[] = {MDM_DL
, DIAG_DL
, APP1_DL
, APP2_DL
, CTRL_DL
};
727 if (port
< NOZOMI_MAX_PORTS
) {
728 dc
->last_ier
|= mask
[port
];
729 writew(dc
->last_ier
, dc
->reg_ier
);
731 dev_err(&dc
->pdev
->dev
, "Called with wrong port?\n");
735 /* Disable downlink interrupts */
736 static void disable_transmit_dl(enum port_type port
, struct nozomi
*dc
)
738 static const u16 mask
[] =
739 {~MDM_DL
, ~DIAG_DL
, ~APP1_DL
, ~APP2_DL
, ~CTRL_DL
};
741 if (port
< NOZOMI_MAX_PORTS
) {
742 dc
->last_ier
&= mask
[port
];
743 writew(dc
->last_ier
, dc
->reg_ier
);
745 dev_err(&dc
->pdev
->dev
, "Called with wrong port?\n");
750 * Return 1 - send buffer to card and ack.
751 * Return 0 - don't ack, don't send buffer to card.
753 static int send_data(enum port_type index
, struct nozomi
*dc
)
756 struct port
*port
= &dc
->port
[index
];
757 const u8 toggle
= port
->toggle_ul
;
758 void __iomem
*addr
= port
->ul_addr
[toggle
];
759 const u32 ul_size
= port
->ul_size
[toggle
];
761 /* Get data from tty and place in buf for now */
762 size
= kfifo_out(&port
->fifo_ul
, dc
->send_buf
,
763 ul_size
< SEND_BUF_MAX
? ul_size
: SEND_BUF_MAX
);
766 DBG4("No more data to send, disable link:");
770 /* DUMP(buf, size); */
772 /* Write length + data */
773 write_mem32(addr
, (u32
*) &size
, 4);
774 write_mem32(addr
+ 4, (u32
*) dc
->send_buf
, size
);
776 tty_port_tty_wakeup(&port
->port
);
781 /* If all data has been read, return 1, else 0 */
782 static int receive_data(enum port_type index
, struct nozomi
*dc
)
784 u8 buf
[RECEIVE_BUF_MAX
] = { 0 };
787 struct port
*port
= &dc
->port
[index
];
788 void __iomem
*addr
= port
->dl_addr
[port
->toggle_dl
];
789 struct tty_struct
*tty
= tty_port_tty_get(&port
->port
);
792 size
= __le32_to_cpu(readl(addr
));
793 /* DBG1( "%d bytes port: %d", size, index); */
795 if (tty
&& tty_throttled(tty
)) {
796 DBG1("No room in tty, don't read data, don't ack interrupt, "
797 "disable interrupt");
799 /* disable interrupt in downlink... */
800 disable_transmit_dl(index
, dc
);
805 if (unlikely(size
== 0)) {
806 dev_err(&dc
->pdev
->dev
, "size == 0?\n");
812 read_mem32((u32
*) buf
, addr
+ offset
, RECEIVE_BUF_MAX
);
815 tty_insert_flip_char(&port
->port
, buf
[0], TTY_NORMAL
);
817 } else if (size
< RECEIVE_BUF_MAX
) {
818 size
-= tty_insert_flip_string(&port
->port
,
821 i
= tty_insert_flip_string(&port
->port
,
822 (char *)buf
, RECEIVE_BUF_MAX
);
828 set_bit(index
, &dc
->flip
);
835 /* Debug for interrupts */
837 static char *interrupt2str(u16 interrupt
)
839 static char buf
[TMP_BUF_MAX
];
842 interrupt
& MDM_DL1
? p
+= snprintf(p
, TMP_BUF_MAX
, "MDM_DL1 ") : NULL
;
843 interrupt
& MDM_DL2
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
846 interrupt
& MDM_UL1
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
848 interrupt
& MDM_UL2
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
851 interrupt
& DIAG_DL1
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
853 interrupt
& DIAG_DL2
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
856 interrupt
& DIAG_UL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
859 interrupt
& APP1_DL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
861 interrupt
& APP2_DL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
864 interrupt
& APP1_UL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
866 interrupt
& APP2_UL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
869 interrupt
& CTRL_DL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
871 interrupt
& CTRL_UL
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
874 interrupt
& RESET
? p
+= snprintf(p
, TMP_BUF_MAX
- (p
- buf
),
882 * Receive flow control
883 * Return 1 - If ok, else 0
885 static int receive_flow_control(struct nozomi
*dc
)
887 enum port_type port
= PORT_MDM
;
888 struct ctrl_dl ctrl_dl
;
889 struct ctrl_dl old_ctrl
;
892 read_mem32((u32
*) &ctrl_dl
, dc
->port
[PORT_CTRL
].dl_addr
[CH_A
], 2);
894 switch (ctrl_dl
.port
) {
896 DBG1("The Base Band sends this value as a response to a "
897 "request for IMSI detach sent over the control "
898 "channel uplink (see section 7.6.1).");
906 enable_ier
= DIAG_DL
;
910 enable_ier
= APP1_DL
;
914 enable_ier
= APP2_DL
;
915 if (dc
->state
== NOZOMI_STATE_ALLOCATED
) {
917 * After card initialization the flow control
918 * received for APP2 is always the last
920 dc
->state
= NOZOMI_STATE_READY
;
921 dev_info(&dc
->pdev
->dev
, "Device READY!\n");
925 dev_err(&dc
->pdev
->dev
,
926 "ERROR: flow control received for non-existing port\n");
930 DBG1("0x%04X->0x%04X", *((u16
*)&dc
->port
[port
].ctrl_dl
),
933 old_ctrl
= dc
->port
[port
].ctrl_dl
;
934 dc
->port
[port
].ctrl_dl
= ctrl_dl
;
936 if (old_ctrl
.CTS
== 1 && ctrl_dl
.CTS
== 0) {
937 DBG1("Disable interrupt (0x%04X) on port: %d",
939 disable_transmit_ul(port
, dc
);
941 } else if (old_ctrl
.CTS
== 0 && ctrl_dl
.CTS
== 1) {
943 if (kfifo_len(&dc
->port
[port
].fifo_ul
)) {
944 DBG1("Enable interrupt (0x%04X) on port: %d",
946 DBG1("Data in buffer [%d], enable transmit! ",
947 kfifo_len(&dc
->port
[port
].fifo_ul
));
948 enable_transmit_ul(port
, dc
);
950 DBG1("No data in buffer...");
954 if (*(u16
*)&old_ctrl
== *(u16
*)&ctrl_dl
) {
955 DBG1(" No change in mctrl");
958 /* Update statistics */
959 if (old_ctrl
.CTS
!= ctrl_dl
.CTS
)
960 dc
->port
[port
].tty_icount
.cts
++;
961 if (old_ctrl
.DSR
!= ctrl_dl
.DSR
)
962 dc
->port
[port
].tty_icount
.dsr
++;
963 if (old_ctrl
.RI
!= ctrl_dl
.RI
)
964 dc
->port
[port
].tty_icount
.rng
++;
965 if (old_ctrl
.DCD
!= ctrl_dl
.DCD
)
966 dc
->port
[port
].tty_icount
.dcd
++;
968 wake_up_interruptible(&dc
->port
[port
].tty_wait
);
970 DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
972 dc
->port
[port
].tty_icount
.dcd
, dc
->port
[port
].tty_icount
.cts
,
973 dc
->port
[port
].tty_icount
.rng
, dc
->port
[port
].tty_icount
.dsr
);
978 static enum ctrl_port_type
port2ctrl(enum port_type port
,
979 const struct nozomi
*dc
)
991 dev_err(&dc
->pdev
->dev
,
992 "ERROR: send flow control " \
993 "received for non-existing port\n");
999 * Send flow control, can only update one channel at a time
1000 * Return 0 - If we have updated all flow control
1001 * Return 1 - If we need to update more flow control, ack current enable more
1003 static int send_flow_control(struct nozomi
*dc
)
1005 u32 i
, more_flow_control_to_be_updated
= 0;
1008 for (i
= PORT_MDM
; i
< MAX_PORT
; i
++) {
1009 if (dc
->port
[i
].update_flow_control
) {
1010 if (more_flow_control_to_be_updated
) {
1011 /* We have more flow control to be updated */
1014 dc
->port
[i
].ctrl_ul
.port
= port2ctrl(i
, dc
);
1015 ctrl
= (u16
*)&dc
->port
[i
].ctrl_ul
;
1016 write_mem32(dc
->port
[PORT_CTRL
].ul_addr
[0], \
1018 dc
->port
[i
].update_flow_control
= 0;
1019 more_flow_control_to_be_updated
= 1;
1026 * Handle downlink data, ports that are handled are modem and diagnostics
1028 * Return 0 - toggle fields are out of sync
1030 static int handle_data_dl(struct nozomi
*dc
, enum port_type port
, u8
*toggle
,
1031 u16 read_iir
, u16 mask1
, u16 mask2
)
1033 if (*toggle
== 0 && read_iir
& mask1
) {
1034 if (receive_data(port
, dc
)) {
1035 writew(mask1
, dc
->reg_fcr
);
1036 *toggle
= !(*toggle
);
1039 if (read_iir
& mask2
) {
1040 if (receive_data(port
, dc
)) {
1041 writew(mask2
, dc
->reg_fcr
);
1042 *toggle
= !(*toggle
);
1045 } else if (*toggle
== 1 && read_iir
& mask2
) {
1046 if (receive_data(port
, dc
)) {
1047 writew(mask2
, dc
->reg_fcr
);
1048 *toggle
= !(*toggle
);
1051 if (read_iir
& mask1
) {
1052 if (receive_data(port
, dc
)) {
1053 writew(mask1
, dc
->reg_fcr
);
1054 *toggle
= !(*toggle
);
1058 dev_err(&dc
->pdev
->dev
, "port out of sync!, toggle:%d\n",
1066 * Handle uplink data, this is currently for the modem port
1068 * Return 0 - toggle field are out of sync
1070 static int handle_data_ul(struct nozomi
*dc
, enum port_type port
, u16 read_iir
)
1072 u8
*toggle
= &(dc
->port
[port
].toggle_ul
);
1074 if (*toggle
== 0 && read_iir
& MDM_UL1
) {
1075 dc
->last_ier
&= ~MDM_UL
;
1076 writew(dc
->last_ier
, dc
->reg_ier
);
1077 if (send_data(port
, dc
)) {
1078 writew(MDM_UL1
, dc
->reg_fcr
);
1079 dc
->last_ier
= dc
->last_ier
| MDM_UL
;
1080 writew(dc
->last_ier
, dc
->reg_ier
);
1084 if (read_iir
& MDM_UL2
) {
1085 dc
->last_ier
&= ~MDM_UL
;
1086 writew(dc
->last_ier
, dc
->reg_ier
);
1087 if (send_data(port
, dc
)) {
1088 writew(MDM_UL2
, dc
->reg_fcr
);
1089 dc
->last_ier
= dc
->last_ier
| MDM_UL
;
1090 writew(dc
->last_ier
, dc
->reg_ier
);
1095 } else if (*toggle
== 1 && read_iir
& MDM_UL2
) {
1096 dc
->last_ier
&= ~MDM_UL
;
1097 writew(dc
->last_ier
, dc
->reg_ier
);
1098 if (send_data(port
, dc
)) {
1099 writew(MDM_UL2
, dc
->reg_fcr
);
1100 dc
->last_ier
= dc
->last_ier
| MDM_UL
;
1101 writew(dc
->last_ier
, dc
->reg_ier
);
1105 if (read_iir
& MDM_UL1
) {
1106 dc
->last_ier
&= ~MDM_UL
;
1107 writew(dc
->last_ier
, dc
->reg_ier
);
1108 if (send_data(port
, dc
)) {
1109 writew(MDM_UL1
, dc
->reg_fcr
);
1110 dc
->last_ier
= dc
->last_ier
| MDM_UL
;
1111 writew(dc
->last_ier
, dc
->reg_ier
);
1116 writew(read_iir
& MDM_UL
, dc
->reg_fcr
);
1117 dev_err(&dc
->pdev
->dev
, "port out of sync!\n");
1123 static irqreturn_t
interrupt_handler(int irq
, void *dev_id
)
1125 struct nozomi
*dc
= dev_id
;
1132 spin_lock(&dc
->spin_mutex
);
1133 read_iir
= readw(dc
->reg_iir
);
1136 if (read_iir
== (u16
)-1)
1139 * Just handle interrupt enabled in IER
1140 * (by masking with dc->last_ier)
1142 read_iir
&= dc
->last_ier
;
1148 DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir
), read_iir
,
1151 if (read_iir
& RESET
) {
1152 if (unlikely(!nozomi_read_config_table(dc
))) {
1154 writew(dc
->last_ier
, dc
->reg_ier
);
1155 dev_err(&dc
->pdev
->dev
, "Could not read status from "
1156 "card, we should disable interface\n");
1158 writew(RESET
, dc
->reg_fcr
);
1160 /* No more useful info if this was the reset interrupt. */
1163 if (read_iir
& CTRL_UL
) {
1165 dc
->last_ier
&= ~CTRL_UL
;
1166 writew(dc
->last_ier
, dc
->reg_ier
);
1167 if (send_flow_control(dc
)) {
1168 writew(CTRL_UL
, dc
->reg_fcr
);
1169 dc
->last_ier
= dc
->last_ier
| CTRL_UL
;
1170 writew(dc
->last_ier
, dc
->reg_ier
);
1173 if (read_iir
& CTRL_DL
) {
1174 receive_flow_control(dc
);
1175 writew(CTRL_DL
, dc
->reg_fcr
);
1177 if (read_iir
& MDM_DL
) {
1178 if (!handle_data_dl(dc
, PORT_MDM
,
1179 &(dc
->port
[PORT_MDM
].toggle_dl
), read_iir
,
1180 MDM_DL1
, MDM_DL2
)) {
1181 dev_err(&dc
->pdev
->dev
, "MDM_DL out of sync!\n");
1185 if (read_iir
& MDM_UL
) {
1186 if (!handle_data_ul(dc
, PORT_MDM
, read_iir
)) {
1187 dev_err(&dc
->pdev
->dev
, "MDM_UL out of sync!\n");
1191 if (read_iir
& DIAG_DL
) {
1192 if (!handle_data_dl(dc
, PORT_DIAG
,
1193 &(dc
->port
[PORT_DIAG
].toggle_dl
), read_iir
,
1194 DIAG_DL1
, DIAG_DL2
)) {
1195 dev_err(&dc
->pdev
->dev
, "DIAG_DL out of sync!\n");
1199 if (read_iir
& DIAG_UL
) {
1200 dc
->last_ier
&= ~DIAG_UL
;
1201 writew(dc
->last_ier
, dc
->reg_ier
);
1202 if (send_data(PORT_DIAG
, dc
)) {
1203 writew(DIAG_UL
, dc
->reg_fcr
);
1204 dc
->last_ier
= dc
->last_ier
| DIAG_UL
;
1205 writew(dc
->last_ier
, dc
->reg_ier
);
1208 if (read_iir
& APP1_DL
) {
1209 if (receive_data(PORT_APP1
, dc
))
1210 writew(APP1_DL
, dc
->reg_fcr
);
1212 if (read_iir
& APP1_UL
) {
1213 dc
->last_ier
&= ~APP1_UL
;
1214 writew(dc
->last_ier
, dc
->reg_ier
);
1215 if (send_data(PORT_APP1
, dc
)) {
1216 writew(APP1_UL
, dc
->reg_fcr
);
1217 dc
->last_ier
= dc
->last_ier
| APP1_UL
;
1218 writew(dc
->last_ier
, dc
->reg_ier
);
1221 if (read_iir
& APP2_DL
) {
1222 if (receive_data(PORT_APP2
, dc
))
1223 writew(APP2_DL
, dc
->reg_fcr
);
1225 if (read_iir
& APP2_UL
) {
1226 dc
->last_ier
&= ~APP2_UL
;
1227 writew(dc
->last_ier
, dc
->reg_ier
);
1228 if (send_data(PORT_APP2
, dc
)) {
1229 writew(APP2_UL
, dc
->reg_fcr
);
1230 dc
->last_ier
= dc
->last_ier
| APP2_UL
;
1231 writew(dc
->last_ier
, dc
->reg_ier
);
1236 spin_unlock(&dc
->spin_mutex
);
1238 for (a
= 0; a
< NOZOMI_MAX_PORTS
; a
++)
1239 if (test_and_clear_bit(a
, &dc
->flip
))
1240 tty_flip_buffer_push(&dc
->port
[a
].port
);
1244 spin_unlock(&dc
->spin_mutex
);
1248 static void nozomi_get_card_type(struct nozomi
*dc
)
1253 for (i
= 0; i
< 6; i
++)
1254 size
+= pci_resource_len(dc
->pdev
, i
);
1256 /* Assume card type F32_8 if no match */
1257 dc
->card_type
= size
== 2048 ? F32_2
: F32_8
;
1259 dev_info(&dc
->pdev
->dev
, "Card type is: %d\n", dc
->card_type
);
1262 static void nozomi_setup_private_data(struct nozomi
*dc
)
1264 void __iomem
*offset
= dc
->base_addr
+ dc
->card_type
/ 2;
1267 dc
->reg_fcr
= (void __iomem
*)(offset
+ R_FCR
);
1268 dc
->reg_iir
= (void __iomem
*)(offset
+ R_IIR
);
1269 dc
->reg_ier
= (void __iomem
*)(offset
+ R_IER
);
1273 dc
->port
[PORT_MDM
].token_dl
= MDM_DL
;
1274 dc
->port
[PORT_DIAG
].token_dl
= DIAG_DL
;
1275 dc
->port
[PORT_APP1
].token_dl
= APP1_DL
;
1276 dc
->port
[PORT_APP2
].token_dl
= APP2_DL
;
1278 for (i
= 0; i
< MAX_PORT
; i
++)
1279 init_waitqueue_head(&dc
->port
[i
].tty_wait
);
1282 static ssize_t
card_type_show(struct device
*dev
, struct device_attribute
*attr
,
1285 const struct nozomi
*dc
= pci_get_drvdata(to_pci_dev(dev
));
1287 return sprintf(buf
, "%d\n", dc
->card_type
);
1289 static DEVICE_ATTR_RO(card_type
);
1291 static ssize_t
open_ttys_show(struct device
*dev
, struct device_attribute
*attr
,
1294 const struct nozomi
*dc
= pci_get_drvdata(to_pci_dev(dev
));
1296 return sprintf(buf
, "%u\n", dc
->open_ttys
);
1298 static DEVICE_ATTR_RO(open_ttys
);
1300 static void make_sysfs_files(struct nozomi
*dc
)
1302 if (device_create_file(&dc
->pdev
->dev
, &dev_attr_card_type
))
1303 dev_err(&dc
->pdev
->dev
,
1304 "Could not create sysfs file for card_type\n");
1305 if (device_create_file(&dc
->pdev
->dev
, &dev_attr_open_ttys
))
1306 dev_err(&dc
->pdev
->dev
,
1307 "Could not create sysfs file for open_ttys\n");
1310 static void remove_sysfs_files(struct nozomi
*dc
)
1312 device_remove_file(&dc
->pdev
->dev
, &dev_attr_card_type
);
1313 device_remove_file(&dc
->pdev
->dev
, &dev_attr_open_ttys
);
1316 /* Allocate memory for one device */
1317 static int nozomi_card_init(struct pci_dev
*pdev
,
1318 const struct pci_device_id
*ent
)
1320 resource_size_t start
;
1322 struct nozomi
*dc
= NULL
;
1326 dev_dbg(&pdev
->dev
, "Init, new card found\n");
1328 for (ndev_idx
= 0; ndev_idx
< ARRAY_SIZE(ndevs
); ndev_idx
++)
1329 if (!ndevs
[ndev_idx
])
1332 if (ndev_idx
>= ARRAY_SIZE(ndevs
)) {
1333 dev_err(&pdev
->dev
, "no free tty range for this card left\n");
1338 dc
= kzalloc(sizeof(struct nozomi
), GFP_KERNEL
);
1339 if (unlikely(!dc
)) {
1340 dev_err(&pdev
->dev
, "Could not allocate memory\n");
1347 ret
= pci_enable_device(dc
->pdev
);
1349 dev_err(&pdev
->dev
, "Failed to enable PCI Device\n");
1353 ret
= pci_request_regions(dc
->pdev
, NOZOMI_NAME
);
1355 dev_err(&pdev
->dev
, "I/O address 0x%04x already in use\n",
1356 (int) /* nozomi_private.io_addr */ 0);
1357 goto err_disable_device
;
1360 start
= pci_resource_start(dc
->pdev
, 0);
1362 dev_err(&pdev
->dev
, "No I/O address for card detected\n");
1367 /* Find out what card type it is */
1368 nozomi_get_card_type(dc
);
1370 dc
->base_addr
= ioremap_nocache(start
, dc
->card_type
);
1371 if (!dc
->base_addr
) {
1372 dev_err(&pdev
->dev
, "Unable to map card MMIO\n");
1377 dc
->send_buf
= kmalloc(SEND_BUF_MAX
, GFP_KERNEL
);
1378 if (!dc
->send_buf
) {
1379 dev_err(&pdev
->dev
, "Could not allocate send buffer?\n");
1384 for (i
= PORT_MDM
; i
< MAX_PORT
; i
++) {
1385 if (kfifo_alloc(&dc
->port
[i
].fifo_ul
, FIFO_BUFFER_SIZE_UL
,
1388 "Could not allocate kfifo buffer\n");
1390 goto err_free_kfifo
;
1394 spin_lock_init(&dc
->spin_mutex
);
1396 nozomi_setup_private_data(dc
);
1398 /* Disable all interrupts */
1400 writew(dc
->last_ier
, dc
->reg_ier
);
1402 ret
= request_irq(pdev
->irq
, &interrupt_handler
, IRQF_SHARED
,
1404 if (unlikely(ret
)) {
1405 dev_err(&pdev
->dev
, "can't request irq %d\n", pdev
->irq
);
1406 goto err_free_kfifo
;
1409 DBG1("base_addr: %p", dc
->base_addr
);
1411 make_sysfs_files(dc
);
1413 dc
->index_start
= ndev_idx
* MAX_PORT
;
1414 ndevs
[ndev_idx
] = dc
;
1416 pci_set_drvdata(pdev
, dc
);
1418 /* Enable RESET interrupt */
1419 dc
->last_ier
= RESET
;
1420 iowrite16(dc
->last_ier
, dc
->reg_ier
);
1422 dc
->state
= NOZOMI_STATE_ENABLED
;
1424 for (i
= 0; i
< MAX_PORT
; i
++) {
1425 struct device
*tty_dev
;
1426 struct port
*port
= &dc
->port
[i
];
1428 tty_port_init(&port
->port
);
1429 port
->port
.ops
= &noz_tty_port_ops
;
1430 tty_dev
= tty_port_register_device(&port
->port
, ntty_driver
,
1431 dc
->index_start
+ i
, &pdev
->dev
);
1433 if (IS_ERR(tty_dev
)) {
1434 ret
= PTR_ERR(tty_dev
);
1435 dev_err(&pdev
->dev
, "Could not allocate tty?\n");
1436 tty_port_destroy(&port
->port
);
1444 for (i
= 0; i
< MAX_PORT
; ++i
) {
1445 tty_unregister_device(ntty_driver
, dc
->index_start
+ i
);
1446 tty_port_destroy(&dc
->port
[i
].port
);
1449 for (i
= 0; i
< MAX_PORT
; i
++)
1450 kfifo_free(&dc
->port
[i
].fifo_ul
);
1452 kfree(dc
->send_buf
);
1453 iounmap(dc
->base_addr
);
1455 pci_release_regions(pdev
);
1457 pci_disable_device(pdev
);
1464 static void tty_exit(struct nozomi
*dc
)
1470 for (i
= 0; i
< MAX_PORT
; ++i
)
1471 tty_port_tty_hangup(&dc
->port
[i
].port
, false);
1473 /* Racy below - surely should wait for scheduled work to be done or
1474 complete off a hangup method ? */
1475 while (dc
->open_ttys
)
1477 for (i
= 0; i
< MAX_PORT
; ++i
) {
1478 tty_unregister_device(ntty_driver
, dc
->index_start
+ i
);
1479 tty_port_destroy(&dc
->port
[i
].port
);
1483 /* Deallocate memory for one device */
1484 static void nozomi_card_exit(struct pci_dev
*pdev
)
1487 struct ctrl_ul ctrl
;
1488 struct nozomi
*dc
= pci_get_drvdata(pdev
);
1490 /* Disable all interrupts */
1492 writew(dc
->last_ier
, dc
->reg_ier
);
1496 /* Send 0x0001, command card to resend the reset token. */
1497 /* This is to get the reset when the module is reloaded. */
1502 DBG1("sending flow control 0x%04X", *((u16
*)&ctrl
));
1504 /* Setup dc->reg addresses to we can use defines here */
1505 write_mem32(dc
->port
[PORT_CTRL
].ul_addr
[0], (u32
*)&ctrl
, 2);
1506 writew(CTRL_UL
, dc
->reg_fcr
); /* push the token to the card. */
1508 remove_sysfs_files(dc
);
1510 free_irq(pdev
->irq
, dc
);
1512 for (i
= 0; i
< MAX_PORT
; i
++)
1513 kfifo_free(&dc
->port
[i
].fifo_ul
);
1515 kfree(dc
->send_buf
);
1517 iounmap(dc
->base_addr
);
1519 pci_release_regions(pdev
);
1521 pci_disable_device(pdev
);
1523 ndevs
[dc
->index_start
/ MAX_PORT
] = NULL
;
1528 static void set_rts(const struct tty_struct
*tty
, int rts
)
1530 struct port
*port
= get_port_by_tty(tty
);
1532 port
->ctrl_ul
.RTS
= rts
;
1533 port
->update_flow_control
= 1;
1534 enable_transmit_ul(PORT_CTRL
, get_dc_by_tty(tty
));
1537 static void set_dtr(const struct tty_struct
*tty
, int dtr
)
1539 struct port
*port
= get_port_by_tty(tty
);
1541 DBG1("SETTING DTR index: %d, dtr: %d", tty
->index
, dtr
);
1543 port
->ctrl_ul
.DTR
= dtr
;
1544 port
->update_flow_control
= 1;
1545 enable_transmit_ul(PORT_CTRL
, get_dc_by_tty(tty
));
1549 * ----------------------------------------------------------------------------
1551 * ----------------------------------------------------------------------------
1554 static int ntty_install(struct tty_driver
*driver
, struct tty_struct
*tty
)
1556 struct port
*port
= get_port_by_tty(tty
);
1557 struct nozomi
*dc
= get_dc_by_tty(tty
);
1559 if (!port
|| !dc
|| dc
->state
!= NOZOMI_STATE_READY
)
1561 ret
= tty_standard_install(driver
, tty
);
1563 tty
->driver_data
= port
;
1567 static void ntty_cleanup(struct tty_struct
*tty
)
1569 tty
->driver_data
= NULL
;
1572 static int ntty_activate(struct tty_port
*tport
, struct tty_struct
*tty
)
1574 struct port
*port
= container_of(tport
, struct port
, port
);
1575 struct nozomi
*dc
= port
->dc
;
1576 unsigned long flags
;
1578 DBG1("open: %d", port
->token_dl
);
1579 spin_lock_irqsave(&dc
->spin_mutex
, flags
);
1580 dc
->last_ier
= dc
->last_ier
| port
->token_dl
;
1581 writew(dc
->last_ier
, dc
->reg_ier
);
1583 spin_unlock_irqrestore(&dc
->spin_mutex
, flags
);
1584 printk("noz: activated %d: %p\n", tty
->index
, tport
);
1588 static int ntty_open(struct tty_struct
*tty
, struct file
*filp
)
1590 struct port
*port
= tty
->driver_data
;
1591 return tty_port_open(&port
->port
, tty
, filp
);
1594 static void ntty_shutdown(struct tty_port
*tport
)
1596 struct port
*port
= container_of(tport
, struct port
, port
);
1597 struct nozomi
*dc
= port
->dc
;
1598 unsigned long flags
;
1600 DBG1("close: %d", port
->token_dl
);
1601 spin_lock_irqsave(&dc
->spin_mutex
, flags
);
1602 dc
->last_ier
&= ~(port
->token_dl
);
1603 writew(dc
->last_ier
, dc
->reg_ier
);
1605 spin_unlock_irqrestore(&dc
->spin_mutex
, flags
);
1606 printk("noz: shutdown %p\n", tport
);
1609 static void ntty_close(struct tty_struct
*tty
, struct file
*filp
)
1611 struct port
*port
= tty
->driver_data
;
1613 tty_port_close(&port
->port
, tty
, filp
);
1616 static void ntty_hangup(struct tty_struct
*tty
)
1618 struct port
*port
= tty
->driver_data
;
1619 tty_port_hangup(&port
->port
);
1623 * called when the userspace process writes to the tty (/dev/noz*).
1624 * Data is inserted into a fifo, which is then read and transferred to the modem.
1626 static int ntty_write(struct tty_struct
*tty
, const unsigned char *buffer
,
1630 struct nozomi
*dc
= get_dc_by_tty(tty
);
1631 struct port
*port
= tty
->driver_data
;
1632 unsigned long flags
;
1634 /* DBG1( "WRITEx: %d, index = %d", count, index); */
1639 rval
= kfifo_in(&port
->fifo_ul
, (unsigned char *)buffer
, count
);
1641 spin_lock_irqsave(&dc
->spin_mutex
, flags
);
1642 /* CTS is only valid on the modem channel */
1643 if (port
== &(dc
->port
[PORT_MDM
])) {
1644 if (port
->ctrl_dl
.CTS
) {
1645 DBG4("Enable interrupt");
1646 enable_transmit_ul(tty
->index
% MAX_PORT
, dc
);
1648 dev_err(&dc
->pdev
->dev
,
1649 "CTS not active on modem port?\n");
1652 enable_transmit_ul(tty
->index
% MAX_PORT
, dc
);
1654 spin_unlock_irqrestore(&dc
->spin_mutex
, flags
);
1660 * Calculate how much is left in device
1661 * This method is called by the upper tty layer.
1662 * #according to sources N_TTY.c it expects a value >= 0 and
1663 * does not check for negative values.
1665 * If the port is unplugged report lots of room and let the bits
1666 * dribble away so we don't block anything.
1668 static int ntty_write_room(struct tty_struct
*tty
)
1670 struct port
*port
= tty
->driver_data
;
1672 const struct nozomi
*dc
= get_dc_by_tty(tty
);
1675 room
= kfifo_avail(&port
->fifo_ul
);
1680 /* Gets io control parameters */
1681 static int ntty_tiocmget(struct tty_struct
*tty
)
1683 const struct port
*port
= tty
->driver_data
;
1684 const struct ctrl_dl
*ctrl_dl
= &port
->ctrl_dl
;
1685 const struct ctrl_ul
*ctrl_ul
= &port
->ctrl_ul
;
1687 /* Note: these could change under us but it is not clear this
1689 return (ctrl_ul
->RTS
? TIOCM_RTS
: 0) |
1690 (ctrl_ul
->DTR
? TIOCM_DTR
: 0) |
1691 (ctrl_dl
->DCD
? TIOCM_CAR
: 0) |
1692 (ctrl_dl
->RI
? TIOCM_RNG
: 0) |
1693 (ctrl_dl
->DSR
? TIOCM_DSR
: 0) |
1694 (ctrl_dl
->CTS
? TIOCM_CTS
: 0);
1697 /* Sets io controls parameters */
1698 static int ntty_tiocmset(struct tty_struct
*tty
,
1699 unsigned int set
, unsigned int clear
)
1701 struct nozomi
*dc
= get_dc_by_tty(tty
);
1702 unsigned long flags
;
1704 spin_lock_irqsave(&dc
->spin_mutex
, flags
);
1705 if (set
& TIOCM_RTS
)
1707 else if (clear
& TIOCM_RTS
)
1710 if (set
& TIOCM_DTR
)
1712 else if (clear
& TIOCM_DTR
)
1714 spin_unlock_irqrestore(&dc
->spin_mutex
, flags
);
1719 static int ntty_cflags_changed(struct port
*port
, unsigned long flags
,
1720 struct async_icount
*cprev
)
1722 const struct async_icount cnow
= port
->tty_icount
;
1725 ret
= ((flags
& TIOCM_RNG
) && (cnow
.rng
!= cprev
->rng
)) ||
1726 ((flags
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
->dsr
)) ||
1727 ((flags
& TIOCM_CD
) && (cnow
.dcd
!= cprev
->dcd
)) ||
1728 ((flags
& TIOCM_CTS
) && (cnow
.cts
!= cprev
->cts
));
1735 static int ntty_tiocgicount(struct tty_struct
*tty
,
1736 struct serial_icounter_struct
*icount
)
1738 struct port
*port
= tty
->driver_data
;
1739 const struct async_icount cnow
= port
->tty_icount
;
1741 icount
->cts
= cnow
.cts
;
1742 icount
->dsr
= cnow
.dsr
;
1743 icount
->rng
= cnow
.rng
;
1744 icount
->dcd
= cnow
.dcd
;
1745 icount
->rx
= cnow
.rx
;
1746 icount
->tx
= cnow
.tx
;
1747 icount
->frame
= cnow
.frame
;
1748 icount
->overrun
= cnow
.overrun
;
1749 icount
->parity
= cnow
.parity
;
1750 icount
->brk
= cnow
.brk
;
1751 icount
->buf_overrun
= cnow
.buf_overrun
;
1755 static int ntty_ioctl(struct tty_struct
*tty
,
1756 unsigned int cmd
, unsigned long arg
)
1758 struct port
*port
= tty
->driver_data
;
1759 int rval
= -ENOIOCTLCMD
;
1761 DBG1("******** IOCTL, cmd: %d", cmd
);
1765 struct async_icount cprev
= port
->tty_icount
;
1767 rval
= wait_event_interruptible(port
->tty_wait
,
1768 ntty_cflags_changed(port
, arg
, &cprev
));
1772 DBG1("ERR: 0x%08X, %d", cmd
, cmd
);
1780 * Called by the upper tty layer when tty buffers are ready
1781 * to receive data again after a call to throttle.
1783 static void ntty_unthrottle(struct tty_struct
*tty
)
1785 struct nozomi
*dc
= get_dc_by_tty(tty
);
1786 unsigned long flags
;
1789 spin_lock_irqsave(&dc
->spin_mutex
, flags
);
1790 enable_transmit_dl(tty
->index
% MAX_PORT
, dc
);
1793 spin_unlock_irqrestore(&dc
->spin_mutex
, flags
);
1797 * Called by the upper tty layer when the tty buffers are almost full.
1798 * The driver should stop send more data.
1800 static void ntty_throttle(struct tty_struct
*tty
)
1802 struct nozomi
*dc
= get_dc_by_tty(tty
);
1803 unsigned long flags
;
1806 spin_lock_irqsave(&dc
->spin_mutex
, flags
);
1808 spin_unlock_irqrestore(&dc
->spin_mutex
, flags
);
1811 /* Returns number of chars in buffer, called by tty layer */
1812 static s32
ntty_chars_in_buffer(struct tty_struct
*tty
)
1814 struct port
*port
= tty
->driver_data
;
1815 struct nozomi
*dc
= get_dc_by_tty(tty
);
1818 if (unlikely(!dc
|| !port
)) {
1819 goto exit_in_buffer
;
1822 rval
= kfifo_len(&port
->fifo_ul
);
1828 static const struct tty_port_operations noz_tty_port_ops
= {
1829 .activate
= ntty_activate
,
1830 .shutdown
= ntty_shutdown
,
1833 static const struct tty_operations tty_ops
= {
1834 .ioctl
= ntty_ioctl
,
1836 .close
= ntty_close
,
1837 .hangup
= ntty_hangup
,
1838 .write
= ntty_write
,
1839 .write_room
= ntty_write_room
,
1840 .unthrottle
= ntty_unthrottle
,
1841 .throttle
= ntty_throttle
,
1842 .chars_in_buffer
= ntty_chars_in_buffer
,
1843 .tiocmget
= ntty_tiocmget
,
1844 .tiocmset
= ntty_tiocmset
,
1845 .get_icount
= ntty_tiocgicount
,
1846 .install
= ntty_install
,
1847 .cleanup
= ntty_cleanup
,
1850 /* Module initialization */
1851 static struct pci_driver nozomi_driver
= {
1852 .name
= NOZOMI_NAME
,
1853 .id_table
= nozomi_pci_tbl
,
1854 .probe
= nozomi_card_init
,
1855 .remove
= nozomi_card_exit
,
1858 static __init
int nozomi_init(void)
1862 printk(KERN_INFO
"Initializing %s\n", VERSION_STRING
);
1864 ntty_driver
= alloc_tty_driver(NTTY_TTY_MAXMINORS
);
1868 ntty_driver
->driver_name
= NOZOMI_NAME_TTY
;
1869 ntty_driver
->name
= "noz";
1870 ntty_driver
->major
= 0;
1871 ntty_driver
->type
= TTY_DRIVER_TYPE_SERIAL
;
1872 ntty_driver
->subtype
= SERIAL_TYPE_NORMAL
;
1873 ntty_driver
->flags
= TTY_DRIVER_REAL_RAW
| TTY_DRIVER_DYNAMIC_DEV
;
1874 ntty_driver
->init_termios
= tty_std_termios
;
1875 ntty_driver
->init_termios
.c_cflag
= B115200
| CS8
| CREAD
| \
1877 ntty_driver
->init_termios
.c_ispeed
= 115200;
1878 ntty_driver
->init_termios
.c_ospeed
= 115200;
1879 tty_set_operations(ntty_driver
, &tty_ops
);
1881 ret
= tty_register_driver(ntty_driver
);
1883 printk(KERN_ERR
"Nozomi: failed to register ntty driver\n");
1887 ret
= pci_register_driver(&nozomi_driver
);
1889 printk(KERN_ERR
"Nozomi: can't register pci driver\n");
1895 tty_unregister_driver(ntty_driver
);
1897 put_tty_driver(ntty_driver
);
1901 static __exit
void nozomi_exit(void)
1903 printk(KERN_INFO
"Unloading %s\n", DRIVER_DESC
);
1904 pci_unregister_driver(&nozomi_driver
);
1905 tty_unregister_driver(ntty_driver
);
1906 put_tty_driver(ntty_driver
);
1909 module_init(nozomi_init
);
1910 module_exit(nozomi_exit
);
1912 MODULE_LICENSE("Dual BSD/GPL");
1913 MODULE_DESCRIPTION(DRIVER_DESC
);