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authorAlan Cox <alan@linux.intel.com>2009-10-09 07:56:41 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 18:18:03 -0500
commitf53a2ade0bb9f2a81f473e6469155172a96b7c38 (patch)
tree860c15fa2bcedb8ecb646bd64144770a8e2618ff
parent1cceefd3a28e54c0777fe544e1fd32253b2a1de5 (diff)
tty: esp: remove broken driver
The ESP driver has been marked broken for years. It's an old ISA device that clearly nobody cares about any more. Remove it Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat
-rw-r--r--Documentation/serial/hayes-esp.txt154
-rw-r--r--drivers/char/Kconfig13
-rw-r--r--drivers/char/Makefile1
-rw-r--r--drivers/char/esp.c2533
-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/hayesesp.h114
6 files changed, 0 insertions, 2816 deletions
diff --git a/Documentation/serial/hayes-esp.txt b/Documentation/serial/hayes-esp.txt
deleted file mode 100644
index 09b5d5856758..000000000000
--- a/Documentation/serial/hayes-esp.txt
+++ /dev/null
@@ -1,154 +0,0 @@
1HAYES ESP DRIVER VERSION 2.1
2
3A big thanks to the people at Hayes, especially Alan Adamson. Their support
4has enabled me to provide enhancements to the driver.
5
6Please report your experiences with this driver to me (arobinso@nyx.net). I
7am looking for both positive and negative feedback.
8
9*** IMPORTANT CHANGES FOR 2.1 ***
10Support for PIO mode. Five situations will cause PIO mode to be used:
111) A multiport card is detected. PIO mode will always be used. (8 port cards
12do not support DMA).
132) The DMA channel is set to an invalid value (anything other than 1 or 3).
143) The DMA buffer/channel could not be allocated. The port will revert to PIO
15mode until it is reopened.
164) Less than a specified number of bytes need to be transferred to/from the
17FIFOs. PIO mode will be used for that transfer only.
185) A port needs to do a DMA transfer and another port is already using the
19DMA channel. PIO mode will be used for that transfer only.
20
21Since the Hayes ESP seems to conflict with other cards (notably sound cards)
22when using DMA, DMA is turned off by default. To use DMA, it must be turned
23on explicitly, either with the "dma=" option described below or with
24setserial. A multiport card can be forced into DMA mode by using setserial;
25however, most multiport cards don't support DMA.
26
27The latest version of setserial allows the enhanced configuration of the ESP
28card to be viewed and modified.
29***
30
31This package contains the files needed to compile a module to support the Hayes
32ESP card. The drivers are basically a modified version of the serial drivers.
33
34Features:
35
36- Uses the enhanced mode of the ESP card, allowing a wider range of
37 interrupts and features than compatibility mode
38- Uses DMA and 16 bit PIO mode to transfer data to and from the ESP's FIFOs,
39 reducing CPU load
40- Supports primary and secondary ports
41
42
43If the driver is compiled as a module, the IRQs to use can be specified by
44using the irq= option. The format is:
45
46irq=[0x100],[0x140],[0x180],[0x200],[0x240],[0x280],[0x300],[0x380]
47
48The address in brackets is the base address of the card. The IRQ of
49nonexistent cards can be set to 0. If an IRQ of a card that does exist is set
50to 0, the driver will attempt to guess at the correct IRQ. For example, to set
51the IRQ of the card at address 0x300 to 12, the insmod command would be:
52
53insmod esp irq=0,0,0,0,0,0,12,0
54
55The custom divisor can be set by using the divisor= option. The format is the
56same as for the irq= option. Each divisor value is a series of hex digits,
57with each digit representing the divisor to use for a corresponding port. The
58divisor value is constructed RIGHT TO LEFT. Specifying a nonzero divisor value
59will automatically set the spd_cust flag. To calculate the divisor to use for
60a certain baud rate, divide the port's base baud (generally 921600) by the
61desired rate. For example, to set the divisor of the primary port at 0x300 to
624 and the divisor of the secondary port at 0x308 to 8, the insmod command would
63be:
64
65insmod esp divisor=0,0,0,0,0,0,0x84,0
66
67The dma= option can be used to set the DMA channel. The channel can be either
681 or 3. Specifying any other value will force the driver to use PIO mode.
69For example, to set the DMA channel to 3, the insmod command would be:
70
71insmod esp dma=3
72
73The rx_trigger= and tx_trigger= options can be used to set the FIFO trigger
74levels. They specify when the ESP card should send an interrupt. Larger
75values will decrease the number of interrupts; however, a value too high may
76result in data loss. Valid values are 1 through 1023, with 768 being the
77default. For example, to set the receive trigger level to 512 bytes and the
78transmit trigger level to 700 bytes, the insmod command would be:
79
80insmod esp rx_trigger=512 tx_trigger=700
81
82The flow_off= and flow_on= options can be used to set the hardware flow off/
83flow on levels. The flow on level must be lower than the flow off level, and
84the flow off level should be higher than rx_trigger. Valid values are 1
85through 1023, with 1016 being the default flow off level and 944 being the
86default flow on level. For example, to set the flow off level to 1000 bytes
87and the flow on level to 935 bytes, the insmod command would be:
88
89insmod esp flow_off=1000 flow_on=935
90
91The rx_timeout= option can be used to set the receive timeout value. This
92value indicates how long after receiving the last character that the ESP card
93should wait before signalling an interrupt. Valid values are 0 though 255,
94with 128 being the default. A value too high will increase latency, and a
95value too low will cause unnecessary interrupts. For example, to set the
96receive timeout to 255, the insmod command would be:
97
98insmod esp rx_timeout=255
99
100The pio_threshold= option sets the threshold (in number of characters) for
101using PIO mode instead of DMA mode. For example, if this value is 32,
102transfers of 32 bytes or less will always use PIO mode.
103
104insmod esp pio_threshold=32
105
106Multiple options can be listed on the insmod command line by separating each
107option with a space. For example:
108
109insmod esp dma=3 trigger=512
110
111The esp module can be automatically loaded when needed. To cause this to
112happen, add the following lines to /etc/modprobe.conf (replacing the last line
113with options for your configuration):
114
115alias char-major-57 esp
116alias char-major-58 esp
117options esp irq=0,0,0,0,0,0,3,0 divisor=0,0,0,0,0,0,0x4,0
118
119You may also need to run 'depmod -a'.
120
121Devices must be created manually. To create the devices, note the output from
122the module after it is inserted. The output will appear in the location where
123kernel messages usually appear (usually /var/adm/messages). Create two devices
124for each 'tty' mentioned, one with major of 57 and the other with major of 58.
125The minor number should be the same as the tty number reported. The commands
126would be (replace ? with the tty number):
127
128mknod /dev/ttyP? c 57 ?
129mknod /dev/cup? c 58 ?
130
131For example, if the following line appears:
132
133Oct 24 18:17:23 techno kernel: ttyP8 at 0x0140 (irq = 3) is an ESP primary port
134
135...two devices should be created:
136
137mknod /dev/ttyP8 c 57 8
138mknod /dev/cup8 c 58 8
139
140You may need to set the permissions on the devices:
141
142chmod 666 /dev/ttyP*
143chmod 666 /dev/cup*
144
145The ESP module and the serial module should not conflict (they can be used at
146the same time). After the ESP module has been loaded the ports on the ESP card
147will no longer be accessible by the serial driver.
148
149If I/O errors are experienced when accessing the port, check for IRQ and DMA
150conflicts ('cat /proc/interrupts' and 'cat /proc/dma' for a list of IRQs and
151DMAs currently in use).
152
153Enjoy!
154Andrew J. Robinson <arobinso@nyx.net>
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 6aad99ec4e0f..6f31c9472100 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -201,19 +201,6 @@ config DIGIEPCA
201 To compile this driver as a module, choose M here: the 201 To compile this driver as a module, choose M here: the
202 module will be called epca. 202 module will be called epca.
203 203
204config ESPSERIAL
205 tristate "Hayes ESP serial port support"
206 depends on SERIAL_NONSTANDARD && ISA && ISA_DMA_API && BROKEN
207 help
208 This is a driver which supports Hayes ESP serial ports. Both single
209 port cards and multiport cards are supported. Make sure to read
210 <file:Documentation/hayes-esp.txt>.
211
212 To compile this driver as a module, choose M here: the
213 module will be called esp.
214
215 If unsure, say N.
216
217config MOXA_INTELLIO 204config MOXA_INTELLIO
218 tristate "Moxa Intellio support" 205 tristate "Moxa Intellio support"
219 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI) 206 depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 19a79dd79eee..f957edf7e45d 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -18,7 +18,6 @@ obj-$(CONFIG_CONSOLE_TRANSLATIONS) += consolemap.o consolemap_deftbl.o
18obj-$(CONFIG_HW_CONSOLE) += vt.o defkeymap.o 18obj-$(CONFIG_HW_CONSOLE) += vt.o defkeymap.o
19obj-$(CONFIG_AUDIT) += tty_audit.o 19obj-$(CONFIG_AUDIT) += tty_audit.o
20obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o 20obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o
21obj-$(CONFIG_ESPSERIAL) += esp.o
22obj-$(CONFIG_MVME147_SCC) += generic_serial.o vme_scc.o 21obj-$(CONFIG_MVME147_SCC) += generic_serial.o vme_scc.o
23obj-$(CONFIG_MVME162_SCC) += generic_serial.o vme_scc.o 22obj-$(CONFIG_MVME162_SCC) += generic_serial.o vme_scc.o
24obj-$(CONFIG_BVME6000_SCC) += generic_serial.o vme_scc.o 23obj-$(CONFIG_BVME6000_SCC) += generic_serial.o vme_scc.o
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
deleted file mode 100644
index b19d43cd9542..000000000000
--- a/drivers/char/esp.c
+++ /dev/null
@@ -1,2533 +0,0 @@
1/*
2 * esp.c - driver for Hayes ESP serial cards
3 *
4 * --- Notices from serial.c, upon which this driver is based ---
5 *
6 * Copyright (C) 1991, 1992 Linus Torvalds
7 *
8 * Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92. Now
9 * much more extensible to support other serial cards based on the
10 * 16450/16550A UART's. Added support for the AST FourPort and the
11 * Accent Async board.
12 *
13 * set_serial_info fixed to set the flags, custom divisor, and uart
14 * type fields. Fix suggested by Michael K. Johnson 12/12/92.
15 *
16 * 11/95: TIOCMIWAIT, TIOCGICOUNT by Angelo Haritsis <ah@doc.ic.ac.uk>
17 *
18 * 03/96: Modularised by Angelo Haritsis <ah@doc.ic.ac.uk>
19 *
20 * rs_set_termios fixed to look also for changes of the input
21 * flags INPCK, BRKINT, PARMRK, IGNPAR and IGNBRK.
22 * Bernd Anhäupl 05/17/96.
23 *
24 * --- End of notices from serial.c ---
25 *
26 * Support for the ESP serial card by Andrew J. Robinson
27 * <arobinso@nyx.net> (Card detection routine taken from a patch
28 * by Dennis J. Boylan). Patches to allow use with 2.1.x contributed
29 * by Chris Faylor.
30 *
31 * Most recent changes: (Andrew J. Robinson)
32 * Support for PIO mode. This allows the driver to work properly with
33 * multiport cards.
34 *
35 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> -
36 * several cleanups, use module_init/module_exit, etc
37 *
38 * This module exports the following rs232 io functions:
39 *
40 * int espserial_init(void);
41 */
42
43#include <linux/module.h>
44#include <linux/errno.h>
45#include <linux/signal.h>
46#include <linux/sched.h>
47#include <linux/interrupt.h>
48#include <linux/tty.h>
49#include <linux/tty_flip.h>
50#include <linux/serial.h>
51#include <linux/serialP.h>
52#include <linux/serial_reg.h>
53#include <linux/major.h>
54#include <linux/string.h>
55#include <linux/fcntl.h>
56#include <linux/ptrace.h>
57#include <linux/ioport.h>
58#include <linux/mm.h>
59#include <linux/init.h>
60#include <linux/delay.h>
61#include <linux/bitops.h>
62
63#include <asm/system.h>
64#include <linux/io.h>
65
66#include <asm/dma.h>
67#include <linux/slab.h>
68#include <linux/uaccess.h>
69
70#include <linux/hayesesp.h>
71
72#define NR_PORTS 64 /* maximum number of ports */
73#define NR_PRIMARY 8 /* maximum number of primary ports */
74#define REGION_SIZE 8 /* size of io region to request */
75
76/* The following variables can be set by giving module options */
77static int irq[NR_PRIMARY]; /* IRQ for each base port */
78static unsigned int divisor[NR_PRIMARY]; /* custom divisor for each port */
79static unsigned int dma = ESP_DMA_CHANNEL; /* DMA channel */
80static unsigned int rx_trigger = ESP_RX_TRIGGER;
81static unsigned int tx_trigger = ESP_TX_TRIGGER;
82static unsigned int flow_off = ESP_FLOW_OFF;
83static unsigned int flow_on = ESP_FLOW_ON;
84static unsigned int rx_timeout = ESP_RX_TMOUT;
85static unsigned int pio_threshold = ESP_PIO_THRESHOLD;
86
87MODULE_LICENSE("GPL");
88
89module_param_array(irq, int, NULL, 0);
90module_param_array(divisor, uint, NULL, 0);
91module_param(dma, uint, 0);
92module_param(rx_trigger, uint, 0);
93module_param(tx_trigger, uint, 0);
94module_param(flow_off, uint, 0);
95module_param(flow_on, uint, 0);
96module_param(rx_timeout, uint, 0);
97module_param(pio_threshold, uint, 0);
98
99/* END */
100
101static char *dma_buffer;
102static int dma_bytes;
103static struct esp_pio_buffer *free_pio_buf;
104
105#define DMA_BUFFER_SZ 1024
106
107#define WAKEUP_CHARS 1024
108
109static char serial_name[] __initdata = "ESP serial driver";
110static char serial_version[] __initdata = "2.2";
111
112static struct tty_driver *esp_driver;
113
114/*
115 * Serial driver configuration section. Here are the various options:
116 *
117 * SERIAL_PARANOIA_CHECK
118 * Check the magic number for the esp_structure where
119 * ever possible.
120 */
121
122#undef SERIAL_PARANOIA_CHECK
123#define SERIAL_DO_RESTART
124
125#undef SERIAL_DEBUG_INTR
126#undef SERIAL_DEBUG_OPEN
127#undef SERIAL_DEBUG_FLOW
128
129#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
130#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
131 tty->name, info->port.flags, \
132 serial_driver.refcount, \
133 info->port.count, tty->count, s)
134#else
135#define DBG_CNT(s)
136#endif
137
138static struct esp_struct *ports;
139
140static void change_speed(struct esp_struct *info);
141static void rs_wait_until_sent(struct tty_struct *, int);
142
143/*
144 * The ESP card has a clock rate of 14.7456 MHz (that is, 2**ESPC_SCALE
145 * times the normal 1.8432 Mhz clock of most serial boards).
146 */
147#define BASE_BAUD ((1843200 / 16) * (1 << ESPC_SCALE))
148
149/* Standard COM flags (except for COM4, because of the 8514 problem) */
150#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
151
152static inline int serial_paranoia_check(struct esp_struct *info,
153 char *name, const char *routine)
154{
155#ifdef SERIAL_PARANOIA_CHECK
156 static const char badmagic[] = KERN_WARNING
157 "Warning: bad magic number for serial struct (%s) in %s\n";
158 static const char badinfo[] = KERN_WARNING
159 "Warning: null esp_struct for (%s) in %s\n";
160
161 if (!info) {
162 printk(badinfo, name, routine);
163 return 1;
164 }
165 if (info->magic != ESP_MAGIC) {
166 printk(badmagic, name, routine);
167 return 1;
168 }
169#endif
170 return 0;
171}
172
173static inline unsigned int serial_in(struct esp_struct *info, int offset)
174{
175 return inb(info->io_port + offset);
176}
177
178static inline void serial_out(struct esp_struct *info, int offset,
179 unsigned char value)
180{
181 outb(value, info->io_port+offset);
182}
183
184/*
185 * ------------------------------------------------------------
186 * rs_stop() and rs_start()
187 *
188 * This routines are called before setting or resetting tty->stopped.
189 * They enable or disable transmitter interrupts, as necessary.
190 * ------------------------------------------------------------
191 */
192static void rs_stop(struct tty_struct *tty)
193{
194 struct esp_struct *info = tty->driver_data;
195 unsigned long flags;
196
197 if (serial_paranoia_check(info, tty->name, "rs_stop"))
198 return;
199
200 spin_lock_irqsave(&info->lock, flags);
201 if (info->IER & UART_IER_THRI) {
202 info->IER &= ~UART_IER_THRI;
203 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
204 serial_out(info, UART_ESI_CMD2, info->IER);
205 }
206 spin_unlock_irqrestore(&info->lock, flags);
207}
208
209static void rs_start(struct tty_struct *tty)
210{
211 struct esp_struct *info = tty->driver_data;
212 unsigned long flags;
213
214 if (serial_paranoia_check(info, tty->name, "rs_start"))
215 return;
216
217 spin_lock_irqsave(&info->lock, flags);
218 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
219 info->IER |= UART_IER_THRI;
220 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
221 serial_out(info, UART_ESI_CMD2, info->IER);
222 }
223 spin_unlock_irqrestore(&info->lock, flags);
224}
225
226/*
227 * ----------------------------------------------------------------------
228 *
229 * Here starts the interrupt handling routines. All of the following
230 * subroutines are declared as inline and are folded into
231 * rs_interrupt(). They were separated out for readability's sake.
232 *
233 * Note: rs_interrupt() is a "fast" interrupt, which means that it
234 * runs with interrupts turned off. People who may want to modify
235 * rs_interrupt() should try to keep the interrupt handler as fast as
236 * possible. After you are done making modifications, it is not a bad
237 * idea to do:
238 *
239 * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
240 *
241 * and look at the resulting assemble code in serial.s.
242 *
243 * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
244 * -----------------------------------------------------------------------
245 */
246
247static DEFINE_SPINLOCK(pio_lock);
248
249static inline struct esp_pio_buffer *get_pio_buffer(void)
250{
251 struct esp_pio_buffer *buf;
252 unsigned long flags;
253
254 spin_lock_irqsave(&pio_lock, flags);
255 if (free_pio_buf) {
256 buf = free_pio_buf;
257 free_pio_buf = buf->next;
258 } else {
259 buf = kmalloc(sizeof(struct esp_pio_buffer), GFP_ATOMIC);
260 }
261 spin_unlock_irqrestore(&pio_lock, flags);
262 return buf;
263}
264
265static inline void release_pio_buffer(struct esp_pio_buffer *buf)
266{
267 unsigned long flags;
268 spin_lock_irqsave(&pio_lock, flags);
269 buf->next = free_pio_buf;
270 free_pio_buf = buf;
271 spin_unlock_irqrestore(&pio_lock, flags);
272}
273
274static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
275{
276 struct tty_struct *tty = info->port.tty;
277 int i;
278 struct esp_pio_buffer *pio_buf;
279 struct esp_pio_buffer *err_buf;
280 unsigned char status_mask;
281
282 pio_buf = get_pio_buffer();
283
284 if (!pio_buf)
285 return;
286
287 err_buf = get_pio_buffer();
288
289 if (!err_buf) {
290 release_pio_buffer(pio_buf);
291 return;
292 }
293
294 status_mask = (info->read_status_mask >> 2) & 0x07;
295
296 for (i = 0; i < num_bytes - 1; i += 2) {
297 *((unsigned short *)(pio_buf->data + i)) =
298 inw(info->io_port + UART_ESI_RX);
299 err_buf->data[i] = serial_in(info, UART_ESI_RWS);
300 err_buf->data[i + 1] = (err_buf->data[i] >> 3) & status_mask;
301 err_buf->data[i] &= status_mask;
302 }
303
304 if (num_bytes & 0x0001) {
305 pio_buf->data[num_bytes - 1] = serial_in(info, UART_ESI_RX);
306 err_buf->data[num_bytes - 1] =
307 (serial_in(info, UART_ESI_RWS) >> 3) & status_mask;
308 }
309
310 /* make sure everything is still ok since interrupts were enabled */
311 tty = info->port.tty;
312
313 if (!tty) {
314 release_pio_buffer(pio_buf);
315 release_pio_buffer(err_buf);
316 info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
317 return;
318 }
319
320 status_mask = (info->ignore_status_mask >> 2) & 0x07;
321
322 for (i = 0; i < num_bytes; i++) {
323 if (!(err_buf->data[i] & status_mask)) {
324 int flag = 0;
325
326 if (err_buf->data[i] & 0x04) {
327 flag = TTY_BREAK;
328 if (info->port.flags & ASYNC_SAK)
329 do_SAK(tty);
330 } else if (err_buf->data[i] & 0x02)
331 flag = TTY_FRAME;
332 else if (err_buf->data[i] & 0x01)
333 flag = TTY_PARITY;
334 tty_insert_flip_char(tty, pio_buf->data[i], flag);
335 }
336 }
337
338 tty_schedule_flip(tty);
339
340 info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
341 release_pio_buffer(pio_buf);
342 release_pio_buffer(err_buf);
343}
344
345static void program_isa_dma(int dma, int dir, unsigned long addr, int len)
346{
347 unsigned long flags;
348
349 flags = claim_dma_lock();
350 disable_dma(dma);
351 clear_dma_ff(dma);
352 set_dma_mode(dma, dir);
353 set_dma_addr(dma, addr);
354 set_dma_count(dma, len);
355 enable_dma(dma);
356 release_dma_lock(flags);
357}
358
359static void receive_chars_dma(struct esp_struct *info, int num_bytes)
360{
361 info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
362 dma_bytes = num_bytes;
363 info->stat_flags |= ESP_STAT_DMA_RX;
364
365 program_isa_dma(dma, DMA_MODE_READ, isa_virt_to_bus(dma_buffer),
366 dma_bytes);
367 serial_out(info, UART_ESI_CMD1, ESI_START_DMA_RX);
368}
369
370static inline void receive_chars_dma_done(struct esp_struct *info,
371 int status)
372{
373 struct tty_struct *tty = info->port.tty;
374 int num_bytes;
375 unsigned long flags;
376
377 flags = claim_dma_lock();
378 disable_dma(dma);
379 clear_dma_ff(dma);
380
381 info->stat_flags &= ~ESP_STAT_DMA_RX;
382 num_bytes = dma_bytes - get_dma_residue(dma);
383 release_dma_lock(flags);
384
385 info->icount.rx += num_bytes;
386
387 if (num_bytes > 0) {
388 tty_insert_flip_string(tty, dma_buffer, num_bytes - 1);
389
390 status &= (0x1c & info->read_status_mask);
391
392 /* Is the status significant or do we throw the last byte ? */
393 if (!(status & info->ignore_status_mask)) {
394 int statflag = 0;
395
396 if (status & 0x10) {
397 statflag = TTY_BREAK;
398 (info->icount.brk)++;
399 if (info->port.flags & ASYNC_SAK)
400 do_SAK(tty);
401 } else if (status & 0x08) {
402 statflag = TTY_FRAME;
403 info->icount.frame++;
404 } else if (status & 0x04) {
405 statflag = TTY_PARITY;
406 info->icount.parity++;
407 }
408 tty_insert_flip_char(tty, dma_buffer[num_bytes - 1],
409 statflag);
410 }
411 tty_schedule_flip(tty);
412 }
413
414 if (dma_bytes != num_bytes) {
415 num_bytes = dma_bytes - num_bytes;
416 dma_bytes = 0;
417 receive_chars_dma(info, num_bytes);
418 } else
419 dma_bytes = 0;
420}
421
422/* Caller must hold info->lock */
423
424static inline void transmit_chars_pio(struct esp_struct *info,
425 int space_avail)
426{
427 int i;
428 struct esp_pio_buffer *pio_buf;
429
430 pio_buf = get_pio_buffer();
431
432 if (!pio_buf)
433 return;
434
435 while (space_avail && info->xmit_cnt) {
436 if (info->xmit_tail + space_avail <= ESP_XMIT_SIZE) {
437 memcpy(pio_buf->data,
438 &(info->xmit_buf[info->xmit_tail]),
439 space_avail);
440 } else {
441 i = ESP_XMIT_SIZE - info->xmit_tail;
442 memcpy(pio_buf->data,
443 &(info->xmit_buf[info->xmit_tail]), i);
444 memcpy(&(pio_buf->data[i]), info->xmit_buf,
445 space_avail - i);
446 }
447
448 info->xmit_cnt -= space_avail;
449 info->xmit_tail = (info->xmit_tail + space_avail) &
450 (ESP_XMIT_SIZE - 1);
451
452 for (i = 0; i < space_avail - 1; i += 2) {
453 outw(*((unsigned short *)(pio_buf->data + i)),
454 info->io_port + UART_ESI_TX);
455 }
456
457 if (space_avail & 0x0001)
458 serial_out(info, UART_ESI_TX,
459 pio_buf->data[space_avail - 1]);
460
461 if (info->xmit_cnt) {
462 serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
463 serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
464 space_avail = serial_in(info, UART_ESI_STAT1) << 8;
465 space_avail |= serial_in(info, UART_ESI_STAT2);
466
467 if (space_avail > info->xmit_cnt)
468 space_avail = info->xmit_cnt;
469 }
470 }
471
472 if (info->xmit_cnt < WAKEUP_CHARS) {
473 if (info->port.tty)
474 tty_wakeup(info->port.tty);
475
476#ifdef SERIAL_DEBUG_INTR
477 printk("THRE...");
478#endif
479
480 if (info->xmit_cnt <= 0) {
481 info->IER &= ~UART_IER_THRI;
482 serial_out(info, UART_ESI_CMD1,
483 ESI_SET_SRV_MASK);
484 serial_out(info, UART_ESI_CMD2, info->IER);
485 }
486 }
487
488 release_pio_buffer(pio_buf);
489}
490
491/* Caller must hold info->lock */
492static inline void transmit_chars_dma(struct esp_struct *info, int num_bytes)
493{
494 dma_bytes = num_bytes;
495
496 if (info->xmit_tail + dma_bytes <= ESP_XMIT_SIZE) {
497 memcpy(dma_buffer, &(info->xmit_buf[info->xmit_tail]),
498 dma_bytes);
499 } else {
500 int i = ESP_XMIT_SIZE - info->xmit_tail;
501 memcpy(dma_buffer, &(info->xmit_buf[info->xmit_tail]),
502 i);
503 memcpy(&(dma_buffer[i]), info->xmit_buf, dma_bytes - i);
504 }
505
506 info->xmit_cnt -= dma_bytes;
507 info->xmit_tail = (info->xmit_tail + dma_bytes) & (ESP_XMIT_SIZE - 1);
508
509 if (info->xmit_cnt < WAKEUP_CHARS) {
510 if (info->port.tty)
511 tty_wakeup(info->port.tty);
512
513#ifdef SERIAL_DEBUG_INTR
514 printk("THRE...");
515#endif
516
517 if (info->xmit_cnt <= 0) {
518 info->IER &= ~UART_IER_THRI;
519 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
520 serial_out(info, UART_ESI_CMD2, info->IER);
521 }
522 }
523
524 info->stat_flags |= ESP_STAT_DMA_TX;
525
526 program_isa_dma(dma, DMA_MODE_WRITE, isa_virt_to_bus(dma_buffer),
527 dma_bytes);
528 serial_out(info, UART_ESI_CMD1, ESI_START_DMA_TX);
529}
530
531static inline void transmit_chars_dma_done(struct esp_struct *info)
532{
533 int num_bytes;
534 unsigned long flags;
535
536 flags = claim_dma_lock();
537 disable_dma(dma);
538 clear_dma_ff(dma);
539
540 num_bytes = dma_bytes - get_dma_residue(dma);
541 info->icount.tx += dma_bytes;
542 release_dma_lock(flags);
543
544 if (dma_bytes != num_bytes) {
545 dma_bytes -= num_bytes;
546 memmove(dma_buffer, dma_buffer + num_bytes, dma_bytes);
547
548 program_isa_dma(dma, DMA_MODE_WRITE,
549 isa_virt_to_bus(dma_buffer), dma_bytes);
550
551 serial_out(info, UART_ESI_CMD1, ESI_START_DMA_TX);
552 } else {
553 dma_bytes = 0;
554 info->stat_flags &= ~ESP_STAT_DMA_TX;
555 }
556}
557
558static void check_modem_status(struct esp_struct *info)
559{
560 int status;
561
562 serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
563 status = serial_in(info, UART_ESI_STAT2);
564
565 if (status & UART_MSR_ANY_DELTA) {
566 /* update input line counters */
567 if (status & UART_MSR_TERI)
568 info->icount.rng++;
569 if (status & UART_MSR_DDSR)
570 info->icount.dsr++;
571 if (status & UART_MSR_DDCD)
572 info->icount.dcd++;
573 if (status & UART_MSR_DCTS)
574 info->icount.cts++;
575 wake_up_interruptible(&info->port.delta_msr_wait);
576 }
577
578 if ((info->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
579#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
580 printk("ttys%d CD now %s...", info->line,
581 (status & UART_MSR_DCD) ? "on" : "off");
582#endif
583 if (status & UART_MSR_DCD)
584 wake_up_interruptible(&info->port.open_wait);
585 else {
586#ifdef SERIAL_DEBUG_OPEN
587 printk("scheduling hangup...");
588#endif
589 tty_hangup(info->port.tty);
590 }
591 }
592}
593
594/*
595 * This is the serial driver's interrupt routine
596 */
597static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
598{
599 struct esp_struct *info;
600 unsigned err_status;
601 unsigned int scratch;
602
603#ifdef SERIAL_DEBUG_INTR
604 printk("rs_interrupt_single(%d)...", irq);
605#endif
606 info = (struct esp_struct *)dev_id;
607 err_status = 0;
608 scratch = serial_in(info, UART_ESI_SID);
609
610 spin_lock(&info->lock);
611
612 if (!info->port.tty) {
613 spin_unlock(&info->lock);
614 return IRQ_NONE;
615 }
616
617 if (scratch & 0x04) { /* error */
618 serial_out(info, UART_ESI_CMD1, ESI_GET_ERR_STAT);
619 err_status = serial_in(info, UART_ESI_STAT1);
620 serial_in(info, UART_ESI_STAT2);
621
622 if (err_status & 0x01)
623 info->stat_flags |= ESP_STAT_RX_TIMEOUT;
624
625 if (err_status & 0x20) /* UART status */
626 check_modem_status(info);
627
628 if (err_status & 0x80) /* Start break */
629 wake_up_interruptible(&info->break_wait);
630 }
631
632 if ((scratch & 0x88) || /* DMA completed or timed out */
633 (err_status & 0x1c) /* receive error */) {
634 if (info->stat_flags & ESP_STAT_DMA_RX)
635 receive_chars_dma_done(info, err_status);
636 else if (info->stat_flags & ESP_STAT_DMA_TX)
637 transmit_chars_dma_done(info);
638 }
639
640 if (!(info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) &&
641 ((scratch & 0x01) || (info->stat_flags & ESP_STAT_RX_TIMEOUT)) &&
642 (info->IER & UART_IER_RDI)) {
643 int num_bytes;
644
645 serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
646 serial_out(info, UART_ESI_CMD1, ESI_GET_RX_AVAIL);
647 num_bytes = serial_in(info, UART_ESI_STAT1) << 8;
648 num_bytes |= serial_in(info, UART_ESI_STAT2);
649
650 num_bytes = tty_buffer_request_room(info->port.tty, num_bytes);
651
652 if (num_bytes) {
653 if (dma_bytes ||
654 (info->stat_flags & ESP_STAT_USE_PIO) ||
655 (num_bytes <= info->config.pio_threshold))
656 receive_chars_pio(info, num_bytes);
657 else
658 receive_chars_dma(info, num_bytes);
659 }
660 }
661
662 if (!(info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) &&
663 (scratch & 0x02) && (info->IER & UART_IER_THRI)) {
664 if ((info->xmit_cnt <= 0) || info->port.tty->stopped) {
665 info->IER &= ~UART_IER_THRI;
666 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
667 serial_out(info, UART_ESI_CMD2, info->IER);
668 } else {
669 int num_bytes;
670
671 serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
672 serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
673 num_bytes = serial_in(info, UART_ESI_STAT1) << 8;
674 num_bytes |= serial_in(info, UART_ESI_STAT2);
675
676 if (num_bytes > info->xmit_cnt)
677 num_bytes = info->xmit_cnt;
678
679 if (num_bytes) {
680 if (dma_bytes ||
681 (info->stat_flags & ESP_STAT_USE_PIO) ||
682 (num_bytes <= info->config.pio_threshold))
683 transmit_chars_pio(info, num_bytes);
684 else
685 transmit_chars_dma(info, num_bytes);
686 }
687 }
688 }
689
690 info->last_active = jiffies;
691
692#ifdef SERIAL_DEBUG_INTR
693 printk("end.\n");
694#endif
695 spin_unlock(&info->lock);
696 return IRQ_HANDLED;
697}
698
699/*
700 * -------------------------------------------------------------------
701 * Here ends the serial interrupt routines.
702 * -------------------------------------------------------------------
703 */
704
705/*
706 * ---------------------------------------------------------------
707 * Low level utility subroutines for the serial driver: routines to
708 * figure out the appropriate timeout for an interrupt chain, routines
709 * to initialize and startup a serial port, and routines to shutdown a
710 * serial port. Useful stuff like that.
711 *
712 * Caller should hold lock
713 * ---------------------------------------------------------------
714 */
715
716static void esp_basic_init(struct esp_struct *info)
717{
718 /* put ESPC in enhanced mode */
719 serial_out(info, UART_ESI_CMD1, ESI_SET_MODE);
720
721 if (info->stat_flags & ESP_STAT_NEVER_DMA)
722 serial_out(info, UART_ESI_CMD2, 0x01);
723 else
724 serial_out(info, UART_ESI_CMD2, 0x31);
725
726 /* disable interrupts for now */
727 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
728 serial_out(info, UART_ESI_CMD2, 0x00);
729
730 /* set interrupt and DMA channel */
731 serial_out(info, UART_ESI_CMD1, ESI_SET_IRQ);
732
733 if (info->stat_flags & ESP_STAT_NEVER_DMA)
734 serial_out(info, UART_ESI_CMD2, 0x01);
735 else
736 serial_out(info, UART_ESI_CMD2, (dma << 4) | 0x01);
737
738 serial_out(info, UART_ESI_CMD1, ESI_SET_ENH_IRQ);
739
740 if (info->line % 8) /* secondary port */
741 serial_out(info, UART_ESI_CMD2, 0x0d); /* shared */
742 else if (info->irq == 9)
743 serial_out(info, UART_ESI_CMD2, 0x02);
744 else
745 serial_out(info, UART_ESI_CMD2, info->irq);
746
747 /* set error status mask (check this) */
748 serial_out(info, UART_ESI_CMD1, ESI_SET_ERR_MASK);
749
750 if (info->stat_flags & ESP_STAT_NEVER_DMA)
751 serial_out(info, UART_ESI_CMD2, 0xa1);
752 else
753 serial_out(info, UART_ESI_CMD2, 0xbd);
754
755 serial_out(info, UART_ESI_CMD2, 0x00);
756
757 /* set DMA timeout */
758 serial_out(info, UART_ESI_CMD1, ESI_SET_DMA_TMOUT);
759 serial_out(info, UART_ESI_CMD2, 0xff);
760
761 /* set FIFO trigger levels */
762 serial_out(info, UART_ESI_CMD1, ESI_SET_TRIGGER);
763 serial_out(info, UART_ESI_CMD2, info->config.rx_trigger >> 8);
764 serial_out(info, UART_ESI_CMD2, info->config.rx_trigger);
765 serial_out(info, UART_ESI_CMD2, info->config.tx_trigger >> 8);
766 serial_out(info, UART_ESI_CMD2, info->config.tx_trigger);
767
768 /* Set clock scaling and wait states */
769 serial_out(info, UART_ESI_CMD1, ESI_SET_PRESCALAR);
770 serial_out(info, UART_ESI_CMD2, 0x04 | ESPC_SCALE);
771
772 /* set reinterrupt pacing */
773 serial_out(info, UART_ESI_CMD1, ESI_SET_REINTR);
774 serial_out(info, UART_ESI_CMD2, 0xff);
775}
776
777static int startup(struct esp_struct *info)
778{
779 unsigned long flags;
780 int retval = 0;
781 unsigned int num_chars;
782
783 spin_lock_irqsave(&info->lock, flags);
784
785 if (info->port.flags & ASYNC_INITIALIZED)
786 goto out;
787
788 if (!info->xmit_buf) {
789 info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_ATOMIC);
790 retval = -ENOMEM;
791 if (!info->xmit_buf)
792 goto out;
793 }
794
795#ifdef SERIAL_DEBUG_OPEN
796 printk(KERN_DEBUG "starting up ttys%d (irq %d)...",
797 info->line, info->irq);
798#endif
799
800 /* Flush the RX buffer. Using the ESI flush command may cause */
801 /* wild interrupts, so read all the data instead. */
802
803 serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
804 serial_out(info, UART_ESI_CMD1, ESI_GET_RX_AVAIL);
805 num_chars = serial_in(info, UART_ESI_STAT1) << 8;
806 num_chars |= serial_in(info, UART_ESI_STAT2);
807
808 while (num_chars > 1) {
809 inw(info->io_port + UART_ESI_RX);
810 num_chars -= 2;
811 }
812
813 if (num_chars)
814 serial_in(info, UART_ESI_RX);
815
816 /* set receive character timeout */
817 serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
818 serial_out(info, UART_ESI_CMD2, info->config.rx_timeout);
819
820 /* clear all flags except the "never DMA" flag */
821 info->stat_flags &= ESP_STAT_NEVER_DMA;
822
823 if (info->stat_flags & ESP_STAT_NEVER_DMA)
824 info->stat_flags |= ESP_STAT_USE_PIO;
825
826 spin_unlock_irqrestore(&info->lock, flags);
827
828 /*
829 * Allocate the IRQ
830 */
831
832 retval = request_irq(info->irq, rs_interrupt_single, IRQF_SHARED,
833 "esp serial", info);
834
835 if (retval) {
836 if (capable(CAP_SYS_ADMIN)) {
837 if (info->port.tty)
838 set_bit(TTY_IO_ERROR,
839 &info->port.tty->flags);
840 retval = 0;
841 }
842 goto out_unlocked;
843 }
844
845 if (!(info->stat_flags & ESP_STAT_USE_PIO) && !dma_buffer) {
846 dma_buffer = (char *)__get_dma_pages(
847 GFP_KERNEL, get_order(DMA_BUFFER_SZ));
848
849 /* use PIO mode if DMA buf/chan cannot be allocated */
850 if (!dma_buffer)
851 info->stat_flags |= ESP_STAT_USE_PIO;
852 else if (request_dma(dma, "esp serial")) {
853 free_pages((unsigned long)dma_buffer,
854 get_order(DMA_BUFFER_SZ));
855 dma_buffer = NULL;
856 info->stat_flags |= ESP_STAT_USE_PIO;
857 }
858
859 }
860
861 info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
862
863 spin_lock_irqsave(&info->lock, flags);
864 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
865 serial_out(info, UART_ESI_CMD2, UART_MCR);
866 serial_out(info, UART_ESI_CMD2, info->MCR);
867
868 /*
869 * Finally, enable interrupts
870 */
871 /* info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; */
872 info->IER = UART_IER_RLSI | UART_IER_RDI | UART_IER_DMA_TMOUT |
873 UART_IER_DMA_TC;
874 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
875 serial_out(info, UART_ESI_CMD2, info->IER);
876
877 if (info->port.tty)
878 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
879 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
880 spin_unlock_irqrestore(&info->lock, flags);
881
882 /*
883 * Set up the tty->alt_speed kludge
884 */
885 if (info->port.tty) {
886 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
887 info->port.tty->alt_speed = 57600;
888 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
889 info->port.tty->alt_speed = 115200;
890 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
891 info->port.tty->alt_speed = 230400;
892 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
893 info->port.tty->alt_speed = 460800;
894 }
895
896 /*
897 * set the speed of the serial port
898 */
899 change_speed(info);
900 info->port.flags |= ASYNC_INITIALIZED;
901 return 0;
902
903out:
904 spin_unlock_irqrestore(&info->lock, flags);
905out_unlocked:
906 return retval;
907}
908
909/*
910 * This routine will shutdown a serial port; interrupts are disabled, and
911 * DTR is dropped if the hangup on close termio flag is on.
912 */
913static void shutdown(struct esp_struct *info)
914{
915 unsigned long flags, f;
916
917 if (!(info->port.flags & ASYNC_INITIALIZED))
918 return;
919
920#ifdef SERIAL_DEBUG_OPEN
921 printk("Shutting down serial port %d (irq %d)....", info->line,
922 info->irq);
923#endif
924
925 spin_lock_irqsave(&info->lock, flags);
926 /*
927 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
928 * here so the queue might never be waken up
929 */
930 wake_up_interruptible(&info->port.delta_msr_wait);
931 wake_up_interruptible(&info->break_wait);
932
933 /* stop a DMA transfer on the port being closed */
934 /* DMA lock is higher priority always */
935 if (info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) {
936 f = claim_dma_lock();
937 disable_dma(dma);
938 clear_dma_ff(dma);
939 release_dma_lock(f);
940
941 dma_bytes = 0;
942 }
943
944 /*
945 * Free the IRQ
946 */
947 free_irq(info->irq, info);
948
949 if (dma_buffer) {
950 struct esp_struct *current_port = ports;
951
952 while (current_port) {
953 if ((current_port != info) &&
954 (current_port->port.flags & ASYNC_INITIALIZED))
955 break;
956
957 current_port = current_port->next_port;
958 }
959
960 if (!current_port) {
961 free_dma(dma);
962 free_pages((unsigned long)dma_buffer,
963 get_order(DMA_BUFFER_SZ));
964 dma_buffer = NULL;
965 }
966 }
967
968 if (info->xmit_buf) {
969 free_page((unsigned long) info->xmit_buf);
970 info->xmit_buf = NULL;
971 }
972
973 info->IER = 0;
974 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
975 serial_out(info, UART_ESI_CMD2, 0x00);
976
977 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
978 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
979
980 info->MCR &= ~UART_MCR_OUT2;
981 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
982 serial_out(info, UART_ESI_CMD2, UART_MCR);
983 serial_out(info, UART_ESI_CMD2, info->MCR);
984
985 if (info->port.tty)
986 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
987
988 info->port.flags &= ~ASYNC_INITIALIZED;
989 spin_unlock_irqrestore(&info->lock, flags);
990}
991
992/*
993 * This routine is called to set the UART divisor registers to match
994 * the specified baud rate for a serial port.
995 */
996static void change_speed(struct esp_struct *info)
997{
998 unsigned short port;
999 int quot = 0;
1000 unsigned cflag, cval;
1001 int baud, bits;
1002 unsigned char flow1 = 0, flow2 = 0;
1003 unsigned long flags;
1004
1005 if (!info->port.tty || !info->port.tty->termios)
1006 return;
1007 cflag = info->port.tty->termios->c_cflag;
1008 port = info->io_port;
1009
1010 /* byte size and parity */
1011 switch (cflag & CSIZE) {
1012 case CS5: cval = 0x00; bits = 7; break;
1013 case CS6: cval = 0x01; bits = 8; break;
1014 case CS7: cval = 0x02; bits = 9; break;
1015 case CS8: cval = 0x03; bits = 10; break;
1016 default: cval = 0x00; bits = 7; break;
1017 }
1018 if (cflag & CSTOPB) {
1019 cval |= 0x04;
1020 bits++;
1021 }
1022 if (cflag & PARENB) {
1023 cval |= UART_LCR_PARITY;
1024 bits++;
1025 }
1026 if (!(cflag & PARODD))
1027 cval |= UART_LCR_EPAR;
1028#ifdef CMSPAR
1029 if (cflag & CMSPAR)
1030 cval |= UART_LCR_SPAR;
1031#endif
1032 baud = tty_get_baud_rate(info->port.tty);
1033 if (baud == 38400 &&
1034 ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
1035 quot = info->custom_divisor;
1036 else {
1037 if (baud == 134) /* Special case since 134 is really 134.5 */
1038 quot = (2*BASE_BAUD / 269);
1039 else if (baud)
1040 quot = BASE_BAUD / baud;
1041 }
1042 /* If the quotient is ever zero, default to 9600 bps */
1043 if (!quot)
1044 quot = BASE_BAUD / 9600;
1045
1046 if (baud) {
1047 /* Actual rate */
1048 baud = BASE_BAUD/quot;
1049 tty_encode_baud_rate(info->port.tty, baud, baud);
1050 }
1051 info->timeout = ((1024 * HZ * bits * quot) / BASE_BAUD) + (HZ / 50);
1052
1053 /* CTS flow control flag and modem status interrupts */
1054 /* info->IER &= ~UART_IER_MSI; */
1055 if (cflag & CRTSCTS) {
1056 info->port.flags |= ASYNC_CTS_FLOW;
1057 /* info->IER |= UART_IER_MSI; */
1058 flow1 = 0x04;
1059 flow2 = 0x10;
1060 } else
1061 info->port.flags &= ~ASYNC_CTS_FLOW;
1062 if (cflag & CLOCAL)
1063 info->port.flags &= ~ASYNC_CHECK_CD;
1064 else
1065 info->port.flags |= ASYNC_CHECK_CD;
1066
1067 /*
1068 * Set up parity check flag
1069 */
1070 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
1071 if (I_INPCK(info->port.tty))
1072 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
1073 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
1074 info->read_status_mask |= UART_LSR_BI;
1075
1076 info->ignore_status_mask = 0;
1077#if 0
1078 /* This should be safe, but for some broken bits of hardware... */
1079 if (I_IGNPAR(info->port.tty)) {
1080 info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
1081 info->read_status_mask |= UART_LSR_PE | UART_LSR_FE;
1082 }
1083#endif
1084 if (I_IGNBRK(info->port.tty)) {
1085 info->ignore_status_mask |= UART_LSR_BI;
1086 info->read_status_mask |= UART_LSR_BI;
1087 /*
1088 * If we're ignore parity and break indicators, ignore
1089 * overruns too. (For real raw support).
1090 */
1091 if (I_IGNPAR(info->port.tty)) {
1092 info->ignore_status_mask |= UART_LSR_OE | \
1093 UART_LSR_PE | UART_LSR_FE;
1094 info->read_status_mask |= UART_LSR_OE | \
1095 UART_LSR_PE | UART_LSR_FE;
1096 }
1097 }
1098
1099 if (I_IXOFF(info->port.tty))
1100 flow1 |= 0x81;
1101
1102 spin_lock_irqsave(&info->lock, flags);
1103 /* set baud */
1104 serial_out(info, UART_ESI_CMD1, ESI_SET_BAUD);
1105 serial_out(info, UART_ESI_CMD2, quot >> 8);
1106 serial_out(info, UART_ESI_CMD2, quot & 0xff);
1107
1108 /* set data bits, parity, etc. */
1109 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
1110 serial_out(info, UART_ESI_CMD2, UART_LCR);
1111 serial_out(info, UART_ESI_CMD2, cval);
1112
1113 /* Enable flow control */
1114 serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_CNTL);
1115 serial_out(info, UART_ESI_CMD2, flow1);
1116 serial_out(info, UART_ESI_CMD2, flow2);
1117
1118 /* set flow control characters (XON/XOFF only) */
1119 if (I_IXOFF(info->port.tty)) {
1120 serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_CHARS);
1121 serial_out(info, UART_ESI_CMD2, START_CHAR(info->port.tty));
1122 serial_out(info, UART_ESI_CMD2, STOP_CHAR(info->port.tty));
1123 serial_out(info, UART_ESI_CMD2, 0x10);
1124 serial_out(info, UART_ESI_CMD2, 0x21);
1125 switch (cflag & CSIZE) {
1126 case CS5:
1127 serial_out(info, UART_ESI_CMD2, 0x1f);
1128 break;
1129 case CS6:
1130 serial_out(info, UART_ESI_CMD2, 0x3f);
1131 break;
1132 case CS7:
1133 case CS8:
1134 serial_out(info, UART_ESI_CMD2, 0x7f);
1135 break;
1136 default:
1137 serial_out(info, UART_ESI_CMD2, 0xff);
1138 break;
1139 }
1140 }
1141
1142 /* Set high/low water */
1143 serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_LVL);
1144 serial_out(info, UART_ESI_CMD2, info->config.flow_off >> 8);
1145 serial_out(info, UART_ESI_CMD2, info->config.flow_off);
1146 serial_out(info, UART_ESI_CMD2, info->config.flow_on >> 8);
1147 serial_out(info, UART_ESI_CMD2, info->config.flow_on);
1148
1149 spin_unlock_irqrestore(&info->lock, flags);
1150}
1151
1152static int rs_put_char(struct tty_struct *tty, unsigned char ch)
1153{
1154 struct esp_struct *info = tty->driver_data;
1155 unsigned long flags;
1156 int ret = 0;
1157
1158 if (serial_paranoia_check(info, tty->name, "rs_put_char"))
1159 return 0;
1160
1161 if (!info->xmit_buf)
1162 return 0;
1163
1164 spin_lock_irqsave(&info->lock, flags);
1165 if (info->xmit_cnt < ESP_XMIT_SIZE - 1) {
1166 info->xmit_buf[info->xmit_head++] = ch;
1167 info->xmit_head &= ESP_XMIT_SIZE-1;
1168 info->xmit_cnt++;
1169 ret = 1;
1170 }
1171 spin_unlock_irqrestore(&info->lock, flags);
1172 return ret;
1173}
1174
1175static void rs_flush_chars(struct tty_struct *tty)
1176{
1177 struct esp_struct *info = tty->driver_data;
1178 unsigned long flags;
1179
1180 if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
1181 return;
1182
1183 spin_lock_irqsave(&info->lock, flags);
1184
1185 if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf)
1186 goto out;
1187
1188 if (!(info->IER & UART_IER_THRI)) {
1189 info->IER |= UART_IER_THRI;
1190 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
1191 serial_out(info, UART_ESI_CMD2, info->IER);
1192 }
1193out:
1194 spin_unlock_irqrestore(&info->lock, flags);
1195}
1196
1197static int rs_write(struct tty_struct *tty,
1198 const unsigned char *buf, int count)
1199{
1200 int c, t, ret = 0;
1201 struct esp_struct *info = tty->driver_data;
1202 unsigned long flags;
1203
1204 if (serial_paranoia_check(info, tty->name, "rs_write"))
1205 return 0;
1206
1207 if (!info->xmit_buf)
1208 return 0;
1209
1210 while (1) {
1211 /* Thanks to R. Wolff for suggesting how to do this with */
1212 /* interrupts enabled */
1213
1214 c = count;
1215 t = ESP_XMIT_SIZE - info->xmit_cnt - 1;
1216
1217 if (t < c)
1218 c = t;
1219
1220 t = ESP_XMIT_SIZE - info->xmit_head;
1221
1222 if (t < c)
1223 c = t;
1224
1225 if (c <= 0)
1226 break;
1227
1228 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1229
1230 info->xmit_head = (info->xmit_head + c) & (ESP_XMIT_SIZE-1);
1231 info->xmit_cnt += c;
1232 buf += c;
1233 count -= c;
1234 ret += c;
1235 }
1236
1237 spin_lock_irqsave(&info->lock, flags);
1238
1239 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1240 info->IER |= UART_IER_THRI;
1241 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
1242 serial_out(info, UART_ESI_CMD2, info->IER);
1243 }
1244
1245 spin_unlock_irqrestore(&info->lock, flags);
1246 return ret;
1247}
1248
1249static int rs_write_room(struct tty_struct *tty)
1250{
1251 struct esp_struct *info = tty->driver_data;
1252 int ret;
1253 unsigned long flags;
1254
1255 if (serial_paranoia_check(info, tty->name, "rs_write_room"))
1256 return 0;
1257
1258 spin_lock_irqsave(&info->lock, flags);
1259
1260 ret = ESP_XMIT_SIZE - info->xmit_cnt - 1;
1261 if (ret < 0)
1262 ret = 0;
1263 spin_unlock_irqrestore(&info->lock, flags);
1264 return ret;
1265}
1266
1267static int rs_chars_in_buffer(struct tty_struct *tty)
1268{
1269 struct esp_struct *info = tty->driver_data;
1270
1271 if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
1272 return 0;
1273 return info->xmit_cnt;
1274}
1275
1276static void rs_flush_buffer(struct tty_struct *tty)
1277{
1278 struct esp_struct *info = tty->driver_data;
1279 unsigned long flags;
1280
1281 if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
1282 return;
1283 spin_lock_irqsave(&info->lock, flags);
1284 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1285 spin_unlock_irqrestore(&info->lock, flags);
1286 tty_wakeup(tty);
1287}
1288
1289/*
1290 * ------------------------------------------------------------
1291 * rs_throttle()
1292 *
1293 * This routine is called by the upper-layer tty layer to signal that
1294 * incoming characters should be throttled.
1295 * ------------------------------------------------------------
1296 */
1297static void rs_throttle(struct tty_struct *tty)
1298{
1299 struct esp_struct *info = tty->driver_data;
1300 unsigned long flags;
1301#ifdef SERIAL_DEBUG_THROTTLE
1302 char buf[64];
1303
1304 printk("throttle %s: %d....\n", tty_name(tty, buf),
1305 tty_chars_in_buffer(tty));
1306#endif
1307
1308 if (serial_paranoia_check(info, tty->name, "rs_throttle"))
1309 return;
1310
1311 spin_lock_irqsave(&info->lock, flags);
1312 info->IER &= ~UART_IER_RDI;
1313 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
1314 serial_out(info, UART_ESI_CMD2, info->IER);
1315 serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
1316 serial_out(info, UART_ESI_CMD2, 0x00);
1317 spin_unlock_irqrestore(&info->lock, flags);
1318}
1319
1320static void rs_unthrottle(struct tty_struct *tty)
1321{
1322 struct esp_struct *info = tty->driver_data;
1323 unsigned long flags;
1324#ifdef SERIAL_DEBUG_THROTTLE
1325 char buf[64];
1326
1327 printk(KERN_DEBUG "unthrottle %s: %d....\n", tty_name(tty, buf),
1328 tty_chars_in_buffer(tty));
1329#endif
1330
1331 if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
1332 return;
1333
1334 spin_lock_irqsave(&info->lock, flags);
1335 info->IER |= UART_IER_RDI;
1336 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
1337 serial_out(info, UART_ESI_CMD2, info->IER);
1338 serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
1339 serial_out(info, UART_ESI_CMD2, info->config.rx_timeout);
1340 spin_unlock_irqrestore(&info->lock, flags);
1341}
1342
1343/*
1344 * ------------------------------------------------------------
1345 * rs_ioctl() and friends
1346 * ------------------------------------------------------------
1347 */
1348
1349static int get_serial_info(struct esp_struct *info,
1350 struct serial_struct __user *retinfo)
1351{
1352 struct serial_struct tmp;
1353
1354 lock_kernel();
1355 memset(&tmp, 0, sizeof(tmp));
1356 tmp.type = PORT_16550A;
1357 tmp.line = info->line;
1358 tmp.port = info->io_port;
1359 tmp.irq = info->irq;
1360 tmp.flags = info->port.flags;
1361 tmp.xmit_fifo_size = 1024;
1362 tmp.baud_base = BASE_BAUD;
1363 tmp.close_delay = info->close_delay;
1364 tmp.closing_wait = info->closing_wait;
1365 tmp.custom_divisor = info->custom_divisor;
1366 tmp.hub6 = 0;
1367 unlock_kernel();
1368 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1369 return -EFAULT;
1370 return 0;
1371}
1372
1373static int get_esp_config(struct esp_struct *info,
1374 struct hayes_esp_config __user *retinfo)
1375{
1376 struct hayes_esp_config tmp;
1377
1378 if (!retinfo)
1379 return -EFAULT;
1380
1381 memset(&tmp, 0, sizeof(tmp));
1382 lock_kernel();
1383 tmp.rx_timeout = info->config.rx_timeout;
1384 tmp.rx_trigger = info->config.rx_trigger;
1385 tmp.tx_trigger = info->config.tx_trigger;
1386 tmp.flow_off = info->config.flow_off;
1387 tmp.flow_on = info->config.flow_on;
1388 tmp.pio_threshold = info->config.pio_threshold;
1389 tmp.dma_channel = (info->stat_flags & ESP_STAT_NEVER_DMA ? 0 : dma);
1390 unlock_kernel();
1391
1392 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1393}
1394
1395static int set_serial_info(struct esp_struct *info,
1396 struct serial_struct __user *new_info)
1397{
1398 struct serial_struct new_serial;
1399 struct esp_struct old_info;
1400 unsigned int change_irq;
1401 int retval = 0;
1402 struct esp_struct *current_async;
1403
1404 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1405 return -EFAULT;
1406 old_info = *info;
1407
1408 if ((new_serial.type != PORT_16550A) ||
1409 (new_serial.hub6) ||
1410 (info->io_port != new_serial.port) ||
1411 (new_serial.baud_base != BASE_BAUD) ||
1412 (new_serial.irq > 15) ||
1413 (new_serial.irq < 2) ||
1414 (new_serial.irq == 6) ||
1415 (new_serial.irq == 8) ||
1416 (new_serial.irq == 13))
1417 return -EINVAL;
1418
1419 change_irq = new_serial.irq != info->irq;
1420
1421 if (change_irq && (info->line % 8))
1422 return -EINVAL;
1423
1424 if (!capable(CAP_SYS_ADMIN)) {
1425 if (change_irq ||
1426 (new_serial.close_delay != info->close_delay) ||
1427 ((new_serial.flags & ~ASYNC_USR_MASK) !=
1428 (info->port.flags & ~ASYNC_USR_MASK)))
1429 return -EPERM;
1430 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1431 (new_serial.flags & ASYNC_USR_MASK));
1432 info->custom_divisor = new_serial.custom_divisor;
1433 } else {
1434 if (new_serial.irq == 2)
1435 new_serial.irq = 9;
1436
1437 if (change_irq) {
1438 current_async = ports;
1439
1440 while (current_async) {
1441 if ((current_async->line >= info->line) &&
1442 (current_async->line < (info->line + 8))) {
1443 if (current_async == info) {
1444 if (current_async->port.count > 1)
1445 return -EBUSY;
1446 } else if (current_async->port.count)
1447 return -EBUSY;
1448 }
1449
1450 current_async = current_async->next_port;
1451 }
1452 }
1453
1454 /*
1455 * OK, past this point, all the error checking has been done.
1456 * At this point, we start making changes.....
1457 */
1458
1459 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1460 (new_serial.flags & ASYNC_FLAGS));
1461 info->custom_divisor = new_serial.custom_divisor;
1462 info->close_delay = new_serial.close_delay * HZ/100;
1463 info->closing_wait = new_serial.closing_wait * HZ/100;
1464
1465 if (change_irq) {
1466 /*
1467 * We need to shutdown the serial port at the old
1468 * port/irq combination.
1469 */
1470 shutdown(info);
1471
1472 current_async = ports;
1473
1474 while (current_async) {
1475 if ((current_async->line >= info->line) &&
1476 (current_async->line < (info->line + 8)))
1477 current_async->irq = new_serial.irq;
1478
1479 current_async = current_async->next_port;
1480 }
1481
1482 serial_out(info, UART_ESI_CMD1, ESI_SET_ENH_IRQ);
1483 if (info->irq == 9)
1484 serial_out(info, UART_ESI_CMD2, 0x02);
1485 else
1486 serial_out(info, UART_ESI_CMD2, info->irq);
1487 }
1488 }
1489
1490 if (info->port.flags & ASYNC_INITIALIZED) {
1491 if (((old_info.port.flags & ASYNC_SPD_MASK) !=
1492 (info->port.flags & ASYNC_SPD_MASK)) ||
1493 (old_info.custom_divisor != info->custom_divisor)) {
1494 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
1495 info->port.tty->alt_speed = 57600;
1496 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
1497 info->port.tty->alt_speed = 115200;
1498 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
1499 info->port.tty->alt_speed = 230400;
1500 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
1501 info->port.tty->alt_speed = 460800;
1502 change_speed(info);
1503 }
1504 } else
1505 retval = startup(info);
1506
1507 return retval;
1508}
1509
1510static int set_esp_config(struct esp_struct *info,
1511 struct hayes_esp_config __user *new_info)
1512{
1513 struct hayes_esp_config new_config;
1514 unsigned int change_dma;
1515 int retval = 0;
1516 struct esp_struct *current_async;
1517 unsigned long flags;
1518
1519 /* Perhaps a non-sysadmin user should be able to do some of these */
1520 /* operations. I haven't decided yet. */
1521
1522 if (!capable(CAP_SYS_ADMIN))
1523 return -EPERM;
1524
1525 if (copy_from_user(&new_config, new_info, sizeof(new_config)))
1526 return -EFAULT;
1527
1528 if ((new_config.flow_on >= new_config.flow_off) ||
1529 (new_config.rx_trigger < 1) ||
1530 (new_config.tx_trigger < 1) ||
1531 (new_config.flow_off < 1) ||
1532 (new_config.flow_on < 1) ||
1533 (new_config.rx_trigger > 1023) ||
1534 (new_config.tx_trigger > 1023) ||
1535 (new_config.flow_off > 1023) ||
1536 (new_config.flow_on > 1023) ||
1537 (new_config.pio_threshold < 0) ||
1538 (new_config.pio_threshold > 1024))
1539 return -EINVAL;
1540
1541 if ((new_config.dma_channel != 1) && (new_config.dma_channel != 3))
1542 new_config.dma_channel = 0;
1543
1544 if (info->stat_flags & ESP_STAT_NEVER_DMA)
1545 change_dma = new_config.dma_channel;
1546 else
1547 change_dma = (new_config.dma_channel != dma);
1548
1549 if (change_dma) {
1550 if (new_config.dma_channel) {
1551 /* PIO mode to DMA mode transition OR */
1552 /* change current DMA channel */
1553 current_async = ports;
1554
1555 while (current_async) {
1556 if (current_async == info) {
1557 if (current_async->port.count > 1)
1558 return -EBUSY;
1559 } else if (current_async->port.count)
1560 return -EBUSY;
1561
1562 current_async = current_async->next_port;
1563 }
1564
1565 shutdown(info);
1566 dma = new_config.dma_channel;
1567 info->stat_flags &= ~ESP_STAT_NEVER_DMA;
1568
1569 /* all ports must use the same DMA channel */
1570
1571 spin_lock_irqsave(&info->lock, flags);
1572 current_async = ports;
1573
1574 while (current_async) {
1575 esp_basic_init(current_async);
1576 current_async = current_async->next_port;
1577 }
1578 spin_unlock_irqrestore(&info->lock, flags);
1579 } else {
1580 /* DMA mode to PIO mode only */
1581 if (info->port.count > 1)
1582 return -EBUSY;
1583
1584 shutdown(info);
1585 spin_lock_irqsave(&info->lock, flags);
1586 info->stat_flags |= ESP_STAT_NEVER_DMA;
1587 esp_basic_init(info);
1588 spin_unlock_irqrestore(&info->lock, flags);
1589 }
1590 }
1591
1592 info->config.pio_threshold = new_config.pio_threshold;
1593
1594 if ((new_config.flow_off != info->config.flow_off) ||
1595 (new_config.flow_on != info->config.flow_on)) {
1596 info->config.flow_off = new_config.flow_off;
1597 info->config.flow_on = new_config.flow_on;
1598
1599 spin_lock_irqsave(&info->lock, flags);
1600 serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_LVL);
1601 serial_out(info, UART_ESI_CMD2, new_config.flow_off >> 8);
1602 serial_out(info, UART_ESI_CMD2, new_config.flow_off);
1603 serial_out(info, UART_ESI_CMD2, new_config.flow_on >> 8);
1604 serial_out(info, UART_ESI_CMD2, new_config.flow_on);
1605 spin_unlock_irqrestore(&info->lock, flags);
1606 }
1607
1608 if ((new_config.rx_trigger != info->config.rx_trigger) ||
1609 (new_config.tx_trigger != info->config.tx_trigger)) {
1610 info->config.rx_trigger = new_config.rx_trigger;
1611 info->config.tx_trigger = new_config.tx_trigger;
1612 spin_lock_irqsave(&info->lock, flags);
1613 serial_out(info, UART_ESI_CMD1, ESI_SET_TRIGGER);
1614 serial_out(info, UART_ESI_CMD2,
1615 new_config.rx_trigger >> 8);
1616 serial_out(info, UART_ESI_CMD2, new_config.rx_trigger);
1617 serial_out(info, UART_ESI_CMD2,
1618 new_config.tx_trigger >> 8);
1619 serial_out(info, UART_ESI_CMD2, new_config.tx_trigger);
1620 spin_unlock_irqrestore(&info->lock, flags);
1621 }
1622
1623 if (new_config.rx_timeout != info->config.rx_timeout) {
1624 info->config.rx_timeout = new_config.rx_timeout;
1625 spin_lock_irqsave(&info->lock, flags);
1626
1627 if (info->IER & UART_IER_RDI) {
1628 serial_out(info, UART_ESI_CMD1,
1629 ESI_SET_RX_TIMEOUT);
1630 serial_out(info, UART_ESI_CMD2,
1631 new_config.rx_timeout);
1632 }
1633
1634 spin_unlock_irqrestore(&info->lock, flags);
1635 }
1636
1637 if (!(info->port.flags & ASYNC_INITIALIZED))
1638 retval = startup(info);
1639
1640 return retval;
1641}
1642
1643/*
1644 * get_lsr_info - get line status register info
1645 *
1646 * Purpose: Let user call ioctl() to get info when the UART physically
1647 * is emptied. On bus types like RS485, the transmitter must
1648 * release the bus after transmitting. This must be done when
1649 * the transmit shift register is empty, not be done when the
1650 * transmit holding register is empty. This functionality
1651 * allows an RS485 driver to be written in user space.
1652 */
1653static int get_lsr_info(struct esp_struct *info, unsigned int __user *value)
1654{
1655 unsigned char status;
1656 unsigned int result;
1657 unsigned long flags;
1658
1659 spin_lock_irqsave(&info->lock, flags);
1660 serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
1661 status = serial_in(info, UART_ESI_STAT1);
1662 spin_unlock_irqrestore(&info->lock, flags);
1663 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1664 return put_user(result, value);
1665}
1666
1667
1668static int esp_tiocmget(struct tty_struct *tty, struct file *file)
1669{
1670 struct esp_struct *info = tty->driver_data;
1671 unsigned char control, status;
1672 unsigned long flags;
1673
1674 if (serial_paranoia_check(info, tty->name, __func__))
1675 return -ENODEV;
1676 if (tty->flags & (1 << TTY_IO_ERROR))
1677 return -EIO;
1678
1679 control = info->MCR;
1680
1681 spin_lock_irqsave(&info->lock, flags);
1682 serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
1683 status = serial_in(info, UART_ESI_STAT2);
1684 spin_unlock_irqrestore(&info->lock, flags);
1685
1686 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
1687 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
1688 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
1689 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
1690 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
1691 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1692}
1693
1694static int esp_tiocmset(struct tty_struct *tty, struct file *file,
1695 unsigned int set, unsigned int clear)
1696{
1697 struct esp_struct *info = tty->driver_data;
1698 unsigned long flags;
1699
1700 if (serial_paranoia_check(info, tty->name, __func__))
1701 return -ENODEV;
1702 if (tty->flags & (1 << TTY_IO_ERROR))
1703 return -EIO;
1704
1705 spin_lock_irqsave(&info->lock, flags);
1706
1707 if (set & TIOCM_RTS)
1708 info->MCR |= UART_MCR_RTS;
1709 if (set & TIOCM_DTR)
1710 info->MCR |= UART_MCR_DTR;
1711
1712 if (clear & TIOCM_RTS)
1713 info->MCR &= ~UART_MCR_RTS;
1714 if (clear & TIOCM_DTR)
1715 info->MCR &= ~UART_MCR_DTR;
1716
1717 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
1718 serial_out(info, UART_ESI_CMD2, UART_MCR);
1719 serial_out(info, UART_ESI_CMD2, info->MCR);
1720
1721 spin_unlock_irqrestore(&info->lock, flags);
1722 return 0;
1723}
1724
1725/*
1726 * rs_break() --- routine which turns the break handling on or off
1727 */
1728static int esp_break(struct tty_struct *tty, int break_state)
1729{
1730 struct esp_struct *info = tty->driver_data;
1731 unsigned long flags;
1732
1733 if (serial_paranoia_check(info, tty->name, "esp_break"))
1734 return -EINVAL;
1735
1736 if (break_state == -1) {
1737 spin_lock_irqsave(&info->lock, flags);
1738 serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
1739 serial_out(info, UART_ESI_CMD2, 0x01);
1740 spin_unlock_irqrestore(&info->lock, flags);
1741
1742 /* FIXME - new style wait needed here */
1743 interruptible_sleep_on(&info->break_wait);
1744 } else {
1745 spin_lock_irqsave(&info->lock, flags);
1746 serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
1747 serial_out(info, UART_ESI_CMD2, 0x00);
1748 spin_unlock_irqrestore(&info->lock, flags);
1749 }
1750 return 0;
1751}
1752
1753static int rs_ioctl(struct tty_struct *tty, struct file *file,
1754 unsigned int cmd, unsigned long arg)
1755{
1756 struct esp_struct *info = tty->driver_data;
1757 struct async_icount cprev, cnow; /* kernel counter temps */
1758 struct serial_icounter_struct __user *p_cuser; /* user space */
1759 void __user *argp = (void __user *)arg;
1760 unsigned long flags;
1761 int ret;
1762
1763 if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
1764 return -ENODEV;
1765
1766 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1767 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
1768 (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT) &&
1769 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT) &&
1770 (cmd != TIOCGHAYESESP) && (cmd != TIOCSHAYESESP)) {
1771 if (tty->flags & (1 << TTY_IO_ERROR))
1772 return -EIO;
1773 }
1774
1775 switch (cmd) {
1776 case TIOCGSERIAL:
1777 return get_serial_info(info, argp);
1778 case TIOCSSERIAL:
1779 lock_kernel();
1780 ret = set_serial_info(info, argp);
1781 unlock_kernel();
1782 return ret;
1783 case TIOCSERGWILD:
1784 return put_user(0L, (unsigned long __user *)argp);
1785 case TIOCSERGETLSR: /* Get line status register */
1786 return get_lsr_info(info, argp);
1787 case TIOCSERSWILD:
1788 if (!capable(CAP_SYS_ADMIN))
1789 return -EPERM;
1790 return 0;
1791 /*
1792 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1793 * - mask passed in arg for lines of interest
1794 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1795 * Caller should use TIOCGICOUNT to see which one it was
1796 */
1797 case TIOCMIWAIT:
1798 spin_lock_irqsave(&info->lock, flags);
1799 cprev = info->icount; /* note the counters on entry */
1800 spin_unlock_irqrestore(&info->lock, flags);
1801 while (1) {
1802 /* FIXME: convert to new style wakeup */
1803 interruptible_sleep_on(&info->port.delta_msr_wait);
1804 /* see if a signal did it */
1805 if (signal_pending(current))
1806 return -ERESTARTSYS;
1807 spin_lock_irqsave(&info->lock, flags);
1808 cnow = info->icount; /* atomic copy */
1809 spin_unlock_irqrestore(&info->lock, flags);
1810 if (cnow.rng == cprev.rng &&
1811 cnow.dsr == cprev.dsr &&
1812 cnow.dcd == cprev.dcd &&
1813 cnow.cts == cprev.cts)
1814 return -EIO; /* no change => error */
1815 if (((arg & TIOCM_RNG) &&
1816 (cnow.rng != cprev.rng)) ||
1817 ((arg & TIOCM_DSR) &&
1818 (cnow.dsr != cprev.dsr)) ||
1819 ((arg & TIOCM_CD) &&
1820 (cnow.dcd != cprev.dcd)) ||
1821 ((arg & TIOCM_CTS) &&
1822 (cnow.cts != cprev.cts))) {
1823 return 0;
1824 }
1825 cprev = cnow;
1826 }
1827 /* NOTREACHED */
1828 /*
1829 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1830 * Return: write counters to the user passed counter struct
1831 * NB: both 1->0 and 0->1 transitions are counted except for
1832 * RI where only 0->1 is counted.
1833 */
1834 case TIOCGICOUNT:
1835 spin_lock_irqsave(&info->lock, flags);
1836 cnow = info->icount;
1837 spin_unlock_irqrestore(&info->lock, flags);
1838 p_cuser = argp;
1839 if (put_user(cnow.cts, &p_cuser->cts) ||
1840 put_user(cnow.dsr, &p_cuser->dsr) ||
1841 put_user(cnow.rng, &p_cuser->rng) ||
1842 put_user(cnow.dcd, &p_cuser->dcd))
1843 return -EFAULT;
1844 return 0;
1845 case TIOCGHAYESESP:
1846 return get_esp_config(info, argp);
1847 case TIOCSHAYESESP:
1848 lock_kernel();
1849 ret = set_esp_config(info, argp);
1850 unlock_kernel();
1851 return ret;
1852 default:
1853 return -ENOIOCTLCMD;
1854 }
1855 return 0;
1856}
1857
1858static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1859{
1860 struct esp_struct *info = tty->driver_data;
1861 unsigned long flags;
1862
1863 change_speed(info);
1864
1865 spin_lock_irqsave(&info->lock, flags);
1866
1867 /* Handle transition to B0 status */
1868 if ((old_termios->c_cflag & CBAUD) &&
1869 !(tty->termios->c_cflag & CBAUD)) {
1870 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
1871 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
1872 serial_out(info, UART_ESI_CMD2, UART_MCR);
1873 serial_out(info, UART_ESI_CMD2, info->MCR);
1874 }
1875
1876 /* Handle transition away from B0 status */
1877 if (!(old_termios->c_cflag & CBAUD) &&
1878 (tty->termios->c_cflag & CBAUD)) {
1879 info->MCR |= (UART_MCR_DTR | UART_MCR_RTS);
1880 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
1881 serial_out(info, UART_ESI_CMD2, UART_MCR);
1882 serial_out(info, UART_ESI_CMD2, info->MCR);
1883 }
1884
1885 spin_unlock_irqrestore(&info->lock, flags);
1886
1887 /* Handle turning of CRTSCTS */
1888 if ((old_termios->c_cflag & CRTSCTS) &&
1889 !(tty->termios->c_cflag & CRTSCTS)) {
1890 rs_start(tty);
1891 }
1892}
1893
1894/*
1895 * ------------------------------------------------------------
1896 * rs_close()
1897 *
1898 * This routine is called when the serial port gets closed. First, we
1899 * wait for the last remaining data to be sent. Then, we unlink its
1900 * async structure from the interrupt chain if necessary, and we free
1901 * that IRQ if nothing is left in the chain.
1902 * ------------------------------------------------------------
1903 */
1904static void rs_close(struct tty_struct *tty, struct file *filp)
1905{
1906 struct esp_struct *info = tty->driver_data;
1907 unsigned long flags;
1908
1909 if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
1910 return;
1911
1912 spin_lock_irqsave(&info->lock, flags);
1913
1914 if (tty_hung_up_p(filp)) {
1915 DBG_CNT("before DEC-hung");
1916 goto out;
1917 }
1918
1919#ifdef SERIAL_DEBUG_OPEN
1920 printk(KERN_DEBUG "rs_close ttys%d, count = %d\n",
1921 info->line, info->port.count);
1922#endif
1923 if (tty->count == 1 && info->port.count != 1) {
1924 /*
1925 * Uh, oh. tty->count is 1, which means that the tty
1926 * structure will be freed. Info->count should always
1927 * be one in these conditions. If it's greater than
1928 * one, we've got real problems, since it means the
1929 * serial port won't be shutdown.
1930 */
1931 printk(KERN_DEBUG "rs_close: bad serial port count; tty->count is 1, info->port.count is %d\n", info->port.count);
1932 info->port.count = 1;
1933 }
1934 if (--info->port.count < 0) {
1935 printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
1936 info->line, info->port.count);
1937 info->port.count = 0;
1938 }
1939 if (info->port.count) {
1940 DBG_CNT("before DEC-2");
1941 goto out;
1942 }
1943 info->port.flags |= ASYNC_CLOSING;
1944
1945 spin_unlock_irqrestore(&info->lock, flags);
1946 /*
1947 * Now we wait for the transmit buffer to clear; and we notify
1948 * the line discipline to only process XON/XOFF characters.
1949 */
1950 tty->closing = 1;
1951 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1952 tty_wait_until_sent(tty, info->closing_wait);
1953 /*
1954 * At this point we stop accepting input. To do this, we
1955 * disable the receive line status interrupts, and tell the
1956 * interrupt driver to stop checking the data ready bit in the
1957 * line status register.
1958 */
1959 /* info->IER &= ~UART_IER_RLSI; */
1960 info->IER &= ~UART_IER_RDI;
1961 info->read_status_mask &= ~UART_LSR_DR;
1962 if (info->port.flags & ASYNC_INITIALIZED) {
1963
1964 spin_lock_irqsave(&info->lock, flags);
1965 serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
1966 serial_out(info, UART_ESI_CMD2, info->IER);
1967
1968 /* disable receive timeout */
1969 serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
1970 serial_out(info, UART_ESI_CMD2, 0x00);
1971
1972 spin_unlock_irqrestore(&info->lock, flags);
1973
1974 /*
1975 * Before we drop DTR, make sure the UART transmitter
1976 * has completely drained; this is especially
1977 * important if there is a transmit FIFO!
1978 */
1979 rs_wait_until_sent(tty, info->timeout);
1980 }
1981 shutdown(info);
1982 rs_flush_buffer(tty);
1983 tty_ldisc_flush(tty);
1984 tty->closing = 0;
1985 info->port.tty = NULL;
1986
1987 if (info->port.blocked_open) {
1988 if (info->close_delay)
1989 msleep_interruptible(jiffies_to_msecs(info->close_delay));
1990 wake_up_interruptible(&info->port.open_wait);
1991 }
1992 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1993 wake_up_interruptible(&info->port.close_wait);
1994 return;
1995
1996out:
1997 spin_unlock_irqrestore(&info->lock, flags);
1998}
1999
2000static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
2001{
2002 struct esp_struct *info = tty->driver_data;
2003 unsigned long orig_jiffies, char_time;
2004 unsigned long flags;
2005
2006 if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
2007 return;
2008
2009 orig_jiffies = jiffies;
2010 char_time = ((info->timeout - HZ / 50) / 1024) / 5;
2011
2012 if (!char_time)
2013 char_time = 1;
2014
2015 spin_lock_irqsave(&info->lock, flags);
2016 serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
2017 serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
2018
2019 while ((serial_in(info, UART_ESI_STAT1) != 0x03) ||
2020 (serial_in(info, UART_ESI_STAT2) != 0xff)) {
2021
2022 spin_unlock_irqrestore(&info->lock, flags);
2023 msleep_interruptible(jiffies_to_msecs(char_time));
2024
2025 if (signal_pending(current))
2026 return;
2027
2028 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2029 return;
2030
2031 spin_lock_irqsave(&info->lock, flags);
2032 serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
2033 serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
2034 }
2035 spin_unlock_irqrestore(&info->lock, flags);
2036 set_current_state(TASK_RUNNING);
2037}
2038
2039/*
2040 * esp_hangup() --- called by tty_hangup() when a hangup is signaled.
2041 */
2042static void esp_hangup(struct tty_struct *tty)
2043{
2044 struct esp_struct *info = tty->driver_data;
2045
2046 if (serial_paranoia_check(info, tty->name, "esp_hangup"))
2047 return;
2048
2049 rs_flush_buffer(tty);
2050 shutdown(info);
2051 info->port.count = 0;
2052 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2053 info->port.tty = NULL;
2054 wake_up_interruptible(&info->port.open_wait);
2055}
2056
2057static int esp_carrier_raised(struct tty_port *port)
2058{
2059 struct esp_struct *info = container_of(port, struct esp_struct, port);
2060 serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
2061 if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD)
2062 return 1;
2063 return 0;
2064}
2065
2066/*
2067 * ------------------------------------------------------------
2068 * esp_open() and friends
2069 * ------------------------------------------------------------
2070 */
2071static int block_til_ready(struct tty_struct *tty, struct file *filp,
2072 struct esp_struct *info)
2073{
2074 DECLARE_WAITQUEUE(wait, current);
2075 int retval;
2076 int do_clocal = 0;
2077 unsigned long flags;
2078 int cd;
2079 struct tty_port *port = &info->port;
2080
2081 /*
2082 * If the device is in the middle of being closed, then block
2083 * until it's done, and then try again.
2084 */
2085 if (tty_hung_up_p(filp) ||
2086 (port->flags & ASYNC_CLOSING)) {
2087 if (port->flags & ASYNC_CLOSING)
2088 interruptible_sleep_on(&port->close_wait);
2089#ifdef SERIAL_DO_RESTART
2090 if (port->flags & ASYNC_HUP_NOTIFY)
2091 return -EAGAIN;
2092 else
2093 return -ERESTARTSYS;
2094#else
2095 return -EAGAIN;
2096#endif
2097 }
2098
2099 /*
2100 * If non-blocking mode is set, or the port is not enabled,
2101 * then make the check up front and then exit.
2102 */
2103 if ((filp->f_flags & O_NONBLOCK) ||
2104 (tty->flags & (1 << TTY_IO_ERROR))) {
2105 port->flags |= ASYNC_NORMAL_ACTIVE;
2106 return 0;
2107 }
2108
2109 if (tty->termios->c_cflag & CLOCAL)
2110 do_clocal = 1;
2111
2112 /*
2113 * Block waiting for the carrier detect and the line to become
2114 * free (i.e., not in use by the callout). While we are in
2115 * this loop, port->count is dropped by one, so that
2116 * rs_close() knows when to free things. We restore it upon
2117 * exit, either normal or abnormal.
2118 */
2119 retval = 0;
2120 add_wait_queue(&port->open_wait, &wait);
2121#ifdef SERIAL_DEBUG_OPEN
2122 printk(KERN_DEBUG "block_til_ready before block: ttys%d, count = %d\n",
2123 info->line, port->count);
2124#endif
2125 spin_lock_irqsave(&info->lock, flags);
2126 if (!tty_hung_up_p(filp))
2127 port->count--;
2128 port->blocked_open++;
2129 while (1) {
2130 if ((tty->termios->c_cflag & CBAUD)) {
2131 unsigned int scratch;
2132
2133 serial_out(info, UART_ESI_CMD1, ESI_READ_UART);
2134 serial_out(info, UART_ESI_CMD2, UART_MCR);
2135 scratch = serial_in(info, UART_ESI_STAT1);
2136 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
2137 serial_out(info, UART_ESI_CMD2, UART_MCR);
2138 serial_out(info, UART_ESI_CMD2,
2139 scratch | UART_MCR_DTR | UART_MCR_RTS);
2140 }
2141 set_current_state(TASK_INTERRUPTIBLE);
2142 if (tty_hung_up_p(filp) ||
2143 !(port->flags & ASYNC_INITIALIZED)) {
2144#ifdef SERIAL_DO_RESTART
2145 if (port->flags & ASYNC_HUP_NOTIFY)
2146 retval = -EAGAIN;
2147 else
2148 retval = -ERESTARTSYS;
2149#else
2150 retval = -EAGAIN;
2151#endif
2152 break;
2153 }
2154
2155 cd = tty_port_carrier_raised(port);
2156
2157 if (!(port->flags & ASYNC_CLOSING) &&
2158 (do_clocal))
2159 break;
2160 if (signal_pending(current)) {
2161 retval = -ERESTARTSYS;
2162 break;
2163 }
2164#ifdef SERIAL_DEBUG_OPEN
2165 printk(KERN_DEBUG "block_til_ready blocking: ttys%d, count = %d\n",
2166 info->line, port->count);
2167#endif
2168 spin_unlock_irqrestore(&info->lock, flags);
2169 schedule();
2170 spin_lock_irqsave(&info->lock, flags);
2171 }
2172 set_current_state(TASK_RUNNING);
2173 remove_wait_queue(&port->open_wait, &wait);
2174 if (!tty_hung_up_p(filp))
2175 port->count++;
2176 port->blocked_open--;
2177 spin_unlock_irqrestore(&info->lock, flags);
2178#ifdef SERIAL_DEBUG_OPEN
2179 printk(KERN_DEBUG "block_til_ready after blocking: ttys%d, count = %d\n",
2180 info->line, port->count);
2181#endif
2182 if (retval)
2183 return retval;
2184 port->flags |= ASYNC_NORMAL_ACTIVE;
2185 return 0;
2186}
2187
2188/*
2189 * This routine is called whenever a serial port is opened. It
2190 * enables interrupts for a serial port, linking in its async structure into
2191 * the IRQ chain. It also performs the serial-specific
2192 * initialization for the tty structure.
2193 */
2194static int esp_open(struct tty_struct *tty, struct file *filp)
2195{
2196 struct esp_struct *info;
2197 int retval, line;
2198 unsigned long flags;
2199
2200 line = tty->index;
2201 if ((line < 0) || (line >= NR_PORTS))
2202 return -ENODEV;
2203
2204 /* find the port in the chain */
2205
2206 info = ports;
2207
2208 while (info && (info->line != line))
2209 info = info->next_port;
2210
2211 if (!info) {
2212 serial_paranoia_check(info, tty->name, "esp_open");
2213 return -ENODEV;
2214 }
2215
2216#ifdef SERIAL_DEBUG_OPEN
2217 printk(KERN_DEBUG "esp_open %s, count = %d\n", tty->name, info->port.count);
2218#endif
2219 spin_lock_irqsave(&info->lock, flags);
2220 info->port.count++;
2221 tty->driver_data = info;
2222 info->port.tty = tty;
2223
2224 spin_unlock_irqrestore(&info->lock, flags);
2225
2226 /*
2227 * Start up serial port
2228 */
2229 retval = startup(info);
2230 if (retval)
2231 return retval;
2232
2233 retval = block_til_ready(tty, filp, info);
2234 if (retval) {
2235#ifdef SERIAL_DEBUG_OPEN
2236 printk(KERN_DEBUG "esp_open returning after block_til_ready with %d\n",
2237 retval);
2238#endif
2239 return retval;
2240 }
2241#ifdef SERIAL_DEBUG_OPEN
2242 printk(KERN_DEBUG "esp_open %s successful...", tty->name);
2243#endif
2244 return 0;
2245}
2246
2247/*
2248 * ---------------------------------------------------------------------
2249 * espserial_init() and friends
2250 *
2251 * espserial_init() is called at boot-time to initialize the serial driver.
2252 * ---------------------------------------------------------------------
2253 */
2254
2255/*
2256 * This routine prints out the appropriate serial driver version
2257 * number, and identifies which options were configured into this
2258 * driver.
2259 */
2260
2261static void __init show_serial_version(void)
2262{
2263 printk(KERN_INFO "%s version %s (DMA %u)\n",
2264 serial_name, serial_version, dma);
2265}
2266
2267/*
2268 * This routine is called by espserial_init() to initialize a specific serial
2269 * port.
2270 */
2271static int autoconfig(struct esp_struct *info)
2272{
2273 int port_detected = 0;
2274 unsigned long flags;
2275
2276 if (!request_region(info->io_port, REGION_SIZE, "esp serial"))
2277 return -EIO;
2278
2279 spin_lock_irqsave(&info->lock, flags);
2280 /*
2281 * Check for ESP card
2282 */
2283
2284 if (serial_in(info, UART_ESI_BASE) == 0xf3) {
2285 serial_out(info, UART_ESI_CMD1, 0x00);
2286 serial_out(info, UART_ESI_CMD1, 0x01);
2287
2288 if ((serial_in(info, UART_ESI_STAT2) & 0x70) == 0x20) {
2289 port_detected = 1;
2290
2291 if (!(info->irq)) {
2292 serial_out(info, UART_ESI_CMD1, 0x02);
2293
2294 if (serial_in(info, UART_ESI_STAT1) & 0x01)
2295 info->irq = 3;
2296 else
2297 info->irq = 4;
2298 }
2299
2300
2301 /* put card in enhanced mode */
2302 /* this prevents access through */
2303 /* the "old" IO ports */
2304 esp_basic_init(info);
2305
2306 /* clear out MCR */
2307 serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
2308 serial_out(info, UART_ESI_CMD2, UART_MCR);
2309 serial_out(info, UART_ESI_CMD2, 0x00);
2310 }
2311 }
2312 if (!port_detected)
2313 release_region(info->io_port, REGION_SIZE);
2314
2315 spin_unlock_irqrestore(&info->lock, flags);
2316 return (port_detected);
2317}
2318
2319static const struct tty_operations esp_ops = {
2320 .open = esp_open,
2321 .close = rs_close,
2322 .write = rs_write,
2323 .put_char = rs_put_char,
2324 .flush_chars = rs_flush_chars,
2325 .write_room = rs_write_room,
2326 .chars_in_buffer = rs_chars_in_buffer,
2327 .flush_buffer = rs_flush_buffer,
2328 .ioctl = rs_ioctl,
2329 .throttle = rs_throttle,
2330 .unthrottle = rs_unthrottle,
2331 .set_termios = rs_set_termios,
2332 .stop = rs_stop,
2333 .start = rs_start,
2334 .hangup = esp_hangup,
2335 .break_ctl = esp_break,
2336 .wait_until_sent = rs_wait_until_sent,
2337 .tiocmget = esp_tiocmget,
2338 .tiocmset = esp_tiocmset,
2339};
2340
2341static const struct tty_port_operations esp_port_ops = {
2342 .esp_carrier_raised,
2343};
2344
2345/*
2346 * The serial driver boot-time initialization code!
2347 */
2348static int __init espserial_init(void)
2349{
2350 int i, offset;
2351 struct esp_struct *info;
2352 struct esp_struct *last_primary = NULL;
2353 int esp[] = { 0x100, 0x140, 0x180, 0x200, 0x240, 0x280, 0x300, 0x380 };
2354
2355 esp_driver = alloc_tty_driver(NR_PORTS);
2356 if (!esp_driver)
2357 return -ENOMEM;
2358
2359 for (i = 0; i < NR_PRIMARY; i++) {
2360 if (irq[i] != 0) {
2361 if ((irq[i] < 2) || (irq[i] > 15) || (irq[i] == 6) ||
2362 (irq[i] == 8) || (irq[i] == 13))
2363 irq[i] = 0;
2364 else if (irq[i] == 2)
2365 irq[i] = 9;
2366 }
2367 }
2368
2369 if ((dma != 1) && (dma != 3))
2370 dma = 0;
2371
2372 if ((rx_trigger < 1) || (rx_trigger > 1023))
2373 rx_trigger = 768;
2374
2375 if ((tx_trigger < 1) || (tx_trigger > 1023))
2376 tx_trigger = 768;
2377
2378 if ((flow_off < 1) || (flow_off > 1023))
2379 flow_off = 1016;
2380
2381 if ((flow_on < 1) || (flow_on > 1023))
2382 flow_on = 944;
2383
2384 if ((rx_timeout < 0) || (rx_timeout > 255))
2385 rx_timeout = 128;
2386
2387 if (flow_on >= flow_off)
2388 flow_on = flow_off - 1;
2389
2390 show_serial_version();
2391
2392 /* Initialize the tty_driver structure */
2393
2394 esp_driver->owner = THIS_MODULE;
2395 esp_driver->name = "ttyP";
2396 esp_driver->major = ESP_IN_MAJOR;
2397 esp_driver->minor_start = 0;
2398 esp_driver->type = TTY_DRIVER_TYPE_SERIAL;
2399 esp_driver->subtype = SERIAL_TYPE_NORMAL;
2400 esp_driver->init_termios = tty_std_termios;
2401 esp_driver->init_termios.c_cflag =
2402 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2403 esp_driver->init_termios.c_ispeed = 9600;
2404 esp_driver->init_termios.c_ospeed = 9600;
2405 esp_driver->flags = TTY_DRIVER_REAL_RAW;
2406 tty_set_operations(esp_driver, &esp_ops);
2407 if (tty_register_driver(esp_driver)) {
2408 printk(KERN_ERR "Couldn't register esp serial driver");
2409 put_tty_driver(esp_driver);
2410 return 1;
2411 }
2412
2413 info = kzalloc(sizeof(struct esp_struct), GFP_KERNEL);
2414
2415 if (!info) {
2416 printk(KERN_ERR "Couldn't allocate memory for esp serial device information\n");
2417 tty_unregister_driver(esp_driver);
2418 put_tty_driver(esp_driver);
2419 return 1;
2420 }
2421
2422 spin_lock_init(&info->lock);
2423 /* rx_trigger, tx_trigger are needed by autoconfig */
2424 info->config.rx_trigger = rx_trigger;
2425 info->config.tx_trigger = tx_trigger;
2426
2427 i = 0;
2428 offset = 0;
2429
2430 do {
2431 tty_port_init(&info->port);
2432 info->port.ops = &esp_port_ops;
2433 info->io_port = esp[i] + offset;
2434 info->irq = irq[i];
2435 info->line = (i * 8) + (offset / 8);
2436
2437 if (!autoconfig(info)) {
2438 i++;
2439 offset = 0;
2440 continue;
2441 }
2442
2443 info->custom_divisor = (divisor[i] >> (offset / 2)) & 0xf;
2444 info->port.flags = STD_COM_FLAGS;
2445 if (info->custom_divisor)
2446 info->port.flags |= ASYNC_SPD_CUST;
2447 info->magic = ESP_MAGIC;
2448 info->close_delay = 5*HZ/10;
2449 info->closing_wait = 30*HZ;
2450 info->config.rx_timeout = rx_timeout;
2451 info->config.flow_on = flow_on;
2452 info->config.flow_off = flow_off;
2453 info->config.pio_threshold = pio_threshold;
2454 info->next_port = ports;
2455 init_waitqueue_head(&info->break_wait);
2456 ports = info;
2457 printk(KERN_INFO "ttyP%d at 0x%04x (irq = %d) is an ESP ",
2458 info->line, info->io_port, info->irq);
2459
2460 if (info->line % 8) {
2461 printk("secondary port\n");
2462 /* 8 port cards can't do DMA */
2463 info->stat_flags |= ESP_STAT_NEVER_DMA;
2464
2465 if (last_primary)
2466 last_primary->stat_flags |= ESP_STAT_NEVER_DMA;
2467 } else {
2468 printk("primary port\n");
2469 last_primary = info;
2470 irq[i] = info->irq;
2471 }
2472
2473 if (!dma)
2474 info->stat_flags |= ESP_STAT_NEVER_DMA;
2475
2476 info = kzalloc(sizeof(struct esp_struct), GFP_KERNEL);
2477 if (!info) {
2478 printk(KERN_ERR "Couldn't allocate memory for esp serial device information\n");
2479 /* allow use of the already detected ports */
2480 return 0;
2481 }
2482
2483 spin_lock_init(&info->lock);
2484 /* rx_trigger, tx_trigger are needed by autoconfig */
2485 info->config.rx_trigger = rx_trigger;
2486 info->config.tx_trigger = tx_trigger;
2487
2488 if (offset == 56) {
2489 i++;
2490 offset = 0;
2491 } else {
2492 offset += 8;
2493 }
2494 } while (i < NR_PRIMARY);
2495
2496 /* free the last port memory allocation */
2497 kfree(info);
2498
2499 return 0;
2500}
2501
2502static void __exit espserial_exit(void)
2503{
2504 int e1;
2505 struct esp_struct *temp_async;
2506 struct esp_pio_buffer *pio_buf;
2507
2508 e1 = tty_unregister_driver(esp_driver);
2509 if (e1)
2510 printk(KERN_ERR "esp: failed to unregister driver (%d)\n", e1);
2511 put_tty_driver(esp_driver);
2512
2513 while (ports) {
2514 if (ports->io_port)
2515 release_region(ports->io_port, REGION_SIZE);
2516 temp_async = ports->next_port;
2517 kfree(ports);
2518 ports = temp_async;
2519 }
2520
2521 if (dma_buffer)
2522 free_pages((unsigned long)dma_buffer,
2523 get_order(DMA_BUFFER_SZ));
2524
2525 while (free_pio_buf) {
2526 pio_buf = free_pio_buf->next;
2527 kfree(free_pio_buf);
2528 free_pio_buf = pio_buf;
2529 }
2530}
2531
2532module_init(espserial_init);
2533module_exit(espserial_exit);
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 5a5385749e16..f72914db2a11 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -214,7 +214,6 @@ unifdef-y += futex.h
214unifdef-y += fs.h 214unifdef-y += fs.h
215unifdef-y += gameport.h 215unifdef-y += gameport.h
216unifdef-y += generic_serial.h 216unifdef-y += generic_serial.h
217unifdef-y += hayesesp.h
218unifdef-y += hdlcdrv.h 217unifdef-y += hdlcdrv.h
219unifdef-y += hdlc.h 218unifdef-y += hdlc.h
220unifdef-y += hdreg.h 219unifdef-y += hdreg.h
diff --git a/include/linux/hayesesp.h b/include/linux/hayesesp.h
deleted file mode 100644
index 92b08cfe4a75..000000000000
--- a/include/linux/hayesesp.h
+++ /dev/null
@@ -1,114 +0,0 @@
1#ifndef HAYESESP_H
2#define HAYESESP_H
3
4struct hayes_esp_config {
5 short flow_on;
6 short flow_off;
7 short rx_trigger;
8 short tx_trigger;
9 short pio_threshold;
10 unsigned char rx_timeout;
11 char dma_channel;
12};
13
14#ifdef __KERNEL__
15
16#define ESP_DMA_CHANNEL 0
17#define ESP_RX_TRIGGER 768
18#define ESP_TX_TRIGGER 768
19#define ESP_FLOW_OFF 1016
20#define ESP_FLOW_ON 944
21#define ESP_RX_TMOUT 128
22#define ESP_PIO_THRESHOLD 32
23
24#define ESP_IN_MAJOR 57 /* major dev # for dial in */
25#define ESP_OUT_MAJOR 58 /* major dev # for dial out */
26#define ESPC_SCALE 3
27#define UART_ESI_BASE 0x00
28#define UART_ESI_SID 0x01
29#define UART_ESI_RX 0x02
30#define UART_ESI_TX 0x02
31#define UART_ESI_CMD1 0x04
32#define UART_ESI_CMD2 0x05
33#define UART_ESI_STAT1 0x04
34#define UART_ESI_STAT2 0x05
35#define UART_ESI_RWS 0x07
36
37#define UART_IER_DMA_TMOUT 0x80
38#define UART_IER_DMA_TC 0x08
39
40#define ESI_SET_IRQ 0x04
41#define ESI_SET_DMA_TMOUT 0x05
42#define ESI_SET_SRV_MASK 0x06
43#define ESI_SET_ERR_MASK 0x07
44#define ESI_SET_FLOW_CNTL 0x08
45#define ESI_SET_FLOW_CHARS 0x09
46#define ESI_SET_FLOW_LVL 0x0a
47#define ESI_SET_TRIGGER 0x0b
48#define ESI_SET_RX_TIMEOUT 0x0c
49#define ESI_SET_FLOW_TMOUT 0x0d
50#define ESI_WRITE_UART 0x0e
51#define ESI_READ_UART 0x0f
52#define ESI_SET_MODE 0x10
53#define ESI_GET_ERR_STAT 0x12
54#define ESI_GET_UART_STAT 0x13
55#define ESI_GET_RX_AVAIL 0x14
56#define ESI_GET_TX_AVAIL 0x15
57#define ESI_START_DMA_RX 0x16
58#define ESI_START_DMA_TX 0x17
59#define ESI_ISSUE_BREAK 0x1a
60#define ESI_FLUSH_RX 0x1b
61#define ESI_FLUSH_TX 0x1c
62#define ESI_SET_BAUD 0x1d
63#define ESI_SET_ENH_IRQ 0x1f
64#define ESI_SET_REINTR 0x20
65#define ESI_SET_PRESCALAR 0x23
66#define ESI_NO_COMMAND 0xff
67
68#define ESP_STAT_RX_TIMEOUT 0x01
69#define ESP_STAT_DMA_RX 0x02
70#define ESP_STAT_DMA_TX 0x04
71#define ESP_STAT_NEVER_DMA 0x08
72#define ESP_STAT_USE_PIO 0x10
73
74#define ESP_MAGIC 0x53ee
75#define ESP_XMIT_SIZE 4096
76
77struct esp_struct {
78 int magic;
79 struct tty_port port;
80 spinlock_t lock;
81 int io_port;
82 int irq;
83 int read_status_mask;
84 int ignore_status_mask;
85 int timeout;
86 int stat_flags;
87 int custom_divisor;
88 int close_delay;
89 unsigned short closing_wait;
90 unsigned short closing_wait2;
91 int IER; /* Interrupt Enable Register */
92 int MCR; /* Modem control register */
93 unsigned long last_active;
94 int line;
95 unsigned char *xmit_buf;
96 int xmit_head;
97 int xmit_tail;
98 int xmit_cnt;
99 wait_queue_head_t break_wait;
100 struct async_icount icount; /* kernel counters for the 4 input interrupts */
101 struct hayes_esp_config config; /* port configuration */
102 struct esp_struct *next_port; /* For the linked list */
103};
104
105struct esp_pio_buffer {
106 unsigned char data[1024];
107 struct esp_pio_buffer *next;
108};
109
110#endif /* __KERNEL__ */
111
112
113#endif /* ESP_H */
114
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-08 15:50:14 -0500