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TTY/Serial driver changes for 5.12-rc1

Browse Source 
Here is the big set of tty/serial driver changes for 5.12-rc1.
 
 Nothing huge, just lots of good cleanups and additions:
 	- Your n_tty line discipline cleanups
 	- vt core cleanups and reworks to make the code more "modern"
 	- stm32 driver additions
 	- tty led support added to the tty core and led layer
 	- minor serial driver fixups and additions
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here is the big set of tty/serial driver changes for 5.12-rc1.

  Nothing huge, just lots of good cleanups and additions:

   - n_tty line discipline cleanups

   - vt core cleanups and reworks to make the code more "modern"

   - stm32 driver additions

   - tty led support added to the tty core and led layer

   - minor serial driver fixups and additions

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (54 commits)
  serial: core: Remove BUG_ON(in_interrupt()) check
  vt_ioctl: Remove in_interrupt() check
  dt-bindings: serial: imx: Switch to my personal address
  vt: keyboard, use new API for keyboard_tasklet
  serial: stm32: improve platform_get_irq condition handling in init_port
  serial: ifx6x60: Remove driver for deprecated platform
  tty: fix up iterate_tty_read() EOVERFLOW handling
  tty: fix up hung_up_tty_read() conversion
  tty: fix up hung_up_tty_write() conversion
  tty: teach the n_tty ICANON case about the new "cookie continuations" too
  tty: teach n_tty line discipline about the new "cookie continuations"
  tty: clean up legacy leftovers from n_tty line discipline
  tty: implement read_iter
  tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer
  serial: remove sirf prima/atlas driver
  serial: mxs-auart: Remove <asm/cacheflush.h>
  serial: mxs-auart: Remove serial_mxs_probe_dt()
  serial: fsl_lpuart: Use of_device_get_match_data()
  dt-bindings: serial: renesas,hscif: Add r8a779a0 support
  tty: serial: Drop unused efm32 serial driver
  ...
This commit is contained in:
Linus Torvalds 2021-02-20 21:28:04 -08:00
commit e4286926ab
70 changed files with 958 additions and 5187 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/ABI/testing/sysfs-class-led-trigger-tty Normal file
View File

@ -0,0 +1,6 @@
What: /sys/class/leds/<led>/ttyname
Date: Dec 2020
KernelVersion: 5.10
Contact: linux-leds@vger.kernel.org
Description:
Specifies the tty device name of the triggering tty

2
Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml
View File

@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
maintainers:
- Fabio Estevam <fabio.estevam@nxp.com>
- Fabio Estevam <festevam@gmail.com>
allOf:
- $ref: "serial.yaml"

2
Documentation/devicetree/bindings/serial/fsl-mxs-auart.yaml
View File

@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
title: Freescale MXS Application UART (AUART)
maintainers:
- Fabio Estevam <fabio.estevam@nxp.com>
- Fabio Estevam <festevam@gmail.com>
allOf:
- $ref: "serial.yaml"

1
Documentation/devicetree/bindings/serial/renesas,hscif.yaml
View File

@ -51,6 +51,7 @@ properties:
- renesas,hscif-r8a77980 # R-Car V3H
- renesas,hscif-r8a77990 # R-Car E3
- renesas,hscif-r8a77995 # R-Car D3
- renesas,hscif-r8a779a0 # R-Car V3U
- const: renesas,rcar-gen3-hscif # R-Car Gen3 and RZ/G2
- const: renesas,hscif # generic HSCIF compatible UART

34
Documentation/devicetree/bindings/serial/sirf-uart.txt
View File

@ -1,34 +0,0 @@
* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter *
Required properties:
- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart",
"sirf,atlas7-uart" or "sirf,atlas7-usp-uart".
- reg : Offset and length of the register set for the device
- interrupts : Should contain uart interrupt
- fifosize : Should define hardware rx/tx fifo size
- clocks : Should contain uart clock number
Optional properties:
- uart-has-rtscts: we have hardware flow controller pins in hardware
- rts-gpios: RTS pin for USP-based UART if uart-has-rtscts is true
- cts-gpios: CTS pin for USP-based UART if uart-has-rtscts is true
Example:
uart0: uart@b0050000 {
cell-index = <0>;
compatible = "sirf,prima2-uart";
reg = <0xb0050000 0x1000>;
interrupts = <17>;
fifosize = <128>;
clocks = <&clks 13>;
};
On the board-specific dts, we can put rts-gpios and cts-gpios like
usp@b0090000 {
compatible = "sirf,prima2-usp-uart";
uart-has-rtscts;
rts-gpios = <&gpio 15 0>;
cts-gpios = <&gpio 46 0>;
};

13
Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
View File

@ -50,11 +50,14 @@ properties:
minItems: 1
maxItems: 2
cts-gpios:
maxItems: 1
rts-gpios:
maxItems: 1
# cts-gpios and rts-gpios properties can be used instead of 'uart-has-rtscts'
# or 'st,hw-flow-ctrl' (deprecated) for making use of any gpio pins for flow
# control instead of dedicated pins.
#
# It should be noted that both cts-gpios/rts-gpios and 'uart-has-rtscts' or
# 'st,hw-flow-ctrl' (deprecated) properties cannot co-exist in a design.
cts-gpios: true
rts-gpios: true
wakeup-source: true

1
Documentation/networking/caif/caif.rst
View File

@ -68,7 +68,6 @@ There are debugfs parameters provided for serial communication.
* tty_status: Prints the bit-mask tty status information
- 0x01 - tty->warned is on.
- 0x02 - tty->low_latency is on.
- 0x04 - tty->packed is on.
- 0x08 - tty->flow_stopped is on.
- 0x10 - tty->hw_stopped is on.

2
drivers/accessibility/speakup/spk_ttyio.c
View File

@ -152,7 +152,7 @@ static int spk_ttyio_initialise_ldisc(struct spk_synth *synth)
if (ret)
return ret;
tty = tty_kopen(dev);
tty = tty_kopen_exclusive(dev);
if (IS_ERR(tty))
return PTR_ERR(tty);

34
drivers/bluetooth/hci_ldisc.c
View File

@ -801,7 +801,8 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
* We don't provide read/write/poll interface for user space.
*/
static ssize_t hci_uart_tty_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr)
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
{
return 0;
}
@ -818,29 +819,28 @@ static __poll_t hci_uart_tty_poll(struct tty_struct *tty,
return 0;
}
static struct tty_ldisc_ops hci_uart_ldisc = {
.owner = THIS_MODULE,
.magic = TTY_LDISC_MAGIC,
.name = "n_hci",
.open = hci_uart_tty_open,
.close = hci_uart_tty_close,
.read = hci_uart_tty_read,
.write = hci_uart_tty_write,
.ioctl = hci_uart_tty_ioctl,
.compat_ioctl = hci_uart_tty_ioctl,
.poll = hci_uart_tty_poll,
.receive_buf = hci_uart_tty_receive,
.write_wakeup = hci_uart_tty_wakeup,
};
static int __init hci_uart_init(void)
{
static struct tty_ldisc_ops hci_uart_ldisc;
int err;
BT_INFO("HCI UART driver ver %s", VERSION);
/* Register the tty discipline */
memset(&hci_uart_ldisc, 0, sizeof(hci_uart_ldisc));
hci_uart_ldisc.magic = TTY_LDISC_MAGIC;
hci_uart_ldisc.name = "n_hci";
hci_uart_ldisc.open = hci_uart_tty_open;
hci_uart_ldisc.close = hci_uart_tty_close;
hci_uart_ldisc.read = hci_uart_tty_read;
hci_uart_ldisc.write = hci_uart_tty_write;
hci_uart_ldisc.ioctl = hci_uart_tty_ioctl;
hci_uart_ldisc.compat_ioctl = hci_uart_tty_ioctl;
hci_uart_ldisc.poll = hci_uart_tty_poll;
hci_uart_ldisc.receive_buf = hci_uart_tty_receive;
hci_uart_ldisc.write_wakeup = hci_uart_tty_wakeup;
hci_uart_ldisc.owner = THIS_MODULE;
err = tty_register_ldisc(N_HCI, &hci_uart_ldisc);
if (err) {
BT_ERR("HCI line discipline registration failed. (%d)", err);

2
drivers/char/pcmcia/synclink_cs.c
View File

@ -2494,8 +2494,6 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
__FILE__, __LINE__, tty->driver->name, port->count);
port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
spin_lock_irqsave(&info->netlock, flags);
if (info->netcount) {
retval = -EBUSY;

4
drivers/input/serio/serport.c
View File

@ -156,7 +156,9 @@ out:
* returning 0 characters.
*/
static ssize_t serport_ldisc_read(struct tty_struct * tty, struct file * file, unsigned char __user * buf, size_t nr)
static ssize_t serport_ldisc_read(struct tty_struct * tty, struct file * file,
unsigned char *kbuf, size_t nr,
void **cookie, unsigned long offset)
{
struct serport *serport = (struct serport*) tty->disc_data;
struct serio *serio;

9
drivers/leds/trigger/Kconfig
View File

@ -144,4 +144,13 @@ config LEDS_TRIGGER_AUDIO
the audio mute and mic-mute changes.
If unsure, say N
config LEDS_TRIGGER_TTY
tristate "LED Trigger for TTY devices"
depends on TTY
help
This allows LEDs to be controlled by activity on ttys which includes
serial devices like /dev/ttyS0.
When build as a module this driver will be called ledtrig-tty.
endif # LEDS_TRIGGERS

1
drivers/leds/trigger/Makefile
View File

@ -15,3 +15,4 @@ obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o
obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
obj-$(CONFIG_LEDS_TRIGGER_PATTERN) += ledtrig-pattern.o
obj-$(CONFIG_LEDS_TRIGGER_AUDIO) += ledtrig-audio.o
obj-$(CONFIG_LEDS_TRIGGER_TTY) += ledtrig-tty.o

183
drivers/leds/trigger/ledtrig-tty.c Normal file
View File

@ -0,0 +1,183 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <uapi/linux/serial.h>
struct ledtrig_tty_data {
struct led_classdev *led_cdev;
struct delayed_work dwork;
struct mutex mutex;
const char *ttyname;
struct tty_struct *tty;
int rx, tx;
};
static void ledtrig_tty_restart(struct ledtrig_tty_data *trigger_data)
{
schedule_delayed_work(&trigger_data->dwork, 0);
}
static ssize_t ttyname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
ssize_t len = 0;
mutex_lock(&trigger_data->mutex);
if (trigger_data->ttyname)
len = sprintf(buf, "%s\n", trigger_data->ttyname);
mutex_unlock(&trigger_data->mutex);
return len;
}
static ssize_t ttyname_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t size)
{
struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev);
char *ttyname;
ssize_t ret = size;
bool running;
if (size > 0 && buf[size - 1] == '\n')
size -= 1;
if (size) {
ttyname = kmemdup_nul(buf, size, GFP_KERNEL);
if (!ttyname) {
ret = -ENOMEM;
goto out_unlock;
}
} else {
ttyname = NULL;
}
mutex_lock(&trigger_data->mutex);
running = trigger_data->ttyname != NULL;
kfree(trigger_data->ttyname);
tty_kref_put(trigger_data->tty);
trigger_data->tty = NULL;
trigger_data->ttyname = ttyname;
out_unlock:
mutex_unlock(&trigger_data->mutex);
if (ttyname && !running)
ledtrig_tty_restart(trigger_data);
return ret;
}
static DEVICE_ATTR_RW(ttyname);
static void ledtrig_tty_work(struct work_struct *work)
{
struct ledtrig_tty_data *trigger_data =
container_of(work, struct ledtrig_tty_data, dwork.work);
struct serial_icounter_struct icount;
int ret;
mutex_lock(&trigger_data->mutex);
if (!trigger_data->ttyname) {
/* exit without rescheduling */
mutex_unlock(&trigger_data->mutex);
return;
}
/* try to get the tty corresponding to $ttyname */
if (!trigger_data->tty) {
dev_t devno;
struct tty_struct *tty;
int ret;
ret = tty_dev_name_to_number(trigger_data->ttyname, &devno);
if (ret < 0)
/*
* A device with this name might appear later, so keep
* retrying.
*/
goto out;
tty = tty_kopen_shared(devno);
if (IS_ERR(tty) || !tty)
/* What to do? retry or abort */
goto out;
trigger_data->tty = tty;
}
ret = tty_get_icount(trigger_data->tty, &icount);
if (ret) {
dev_info(trigger_data->tty->dev, "Failed to get icount, stopped polling\n");
mutex_unlock(&trigger_data->mutex);
return;
}
if (icount.rx != trigger_data->rx ||
icount.tx != trigger_data->tx) {
led_set_brightness(trigger_data->led_cdev, LED_ON);
trigger_data->rx = icount.rx;
trigger_data->tx = icount.tx;
} else {
led_set_brightness(trigger_data->led_cdev, LED_OFF);
}
out:
mutex_unlock(&trigger_data->mutex);
schedule_delayed_work(&trigger_data->dwork, msecs_to_jiffies(100));
}
static struct attribute *ledtrig_tty_attrs[] = {
&dev_attr_ttyname.attr,
NULL
};
ATTRIBUTE_GROUPS(ledtrig_tty);
static int ledtrig_tty_activate(struct led_classdev *led_cdev)
{
struct ledtrig_tty_data *trigger_data;
trigger_data = kzalloc(sizeof(*trigger_data), GFP_KERNEL);
if (!trigger_data)
return -ENOMEM;
led_set_trigger_data(led_cdev, trigger_data);
INIT_DELAYED_WORK(&trigger_data->dwork, ledtrig_tty_work);
trigger_data->led_cdev = led_cdev;
mutex_init(&trigger_data->mutex);
return 0;
}
static void ledtrig_tty_deactivate(struct led_classdev *led_cdev)
{
struct ledtrig_tty_data *trigger_data = led_get_trigger_data(led_cdev);
cancel_delayed_work_sync(&trigger_data->dwork);
kfree(trigger_data);
}
static struct led_trigger ledtrig_tty = {
.name = "tty",
.activate = ledtrig_tty_activate,
.deactivate = ledtrig_tty_deactivate,
.groups = ledtrig_tty_groups,
};
module_led_trigger(ledtrig_tty);
MODULE_AUTHOR("Uwe Kleine-König <u.kleine-koenig@pengutronix.de>");
MODULE_DESCRIPTION("UART LED trigger");
MODULE_LICENSE("GPL v2");

3
drivers/net/caif/caif_serial.c
View File

@ -89,8 +89,7 @@ static inline void update_tty_status(struct ser_device *ser)
ser->tty_status =
ser->tty->stopped << 5 |
ser->tty->flow_stopped << 3 |
ser->tty->packet << 2 |
ser->tty->port->low_latency << 1;
ser->tty->packet << 2;
}
static inline void debugfs_init(struct ser_device *ser, struct tty_struct *tty)
{

3
drivers/net/ppp/ppp_async.c
View File

@ -259,7 +259,8 @@ static int ppp_asynctty_hangup(struct tty_struct *tty)
*/
static ssize_t
ppp_asynctty_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t count)
unsigned char *buf, size_t count,
void **cookie, unsigned long offset)
{
return -EAGAIN;
}

3
drivers/net/ppp/ppp_synctty.c
View File

@ -257,7 +257,8 @@ static int ppp_sync_hangup(struct tty_struct *tty)
*/
static ssize_t
ppp_sync_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t count)
unsigned char *buf, size_t count,
void **cookie, unsigned long offset)
{
return -EAGAIN;
}

1
drivers/s390/char/con3215.c
View File

@ -914,7 +914,6 @@ static int tty3215_open(struct tty_struct *tty, struct file * filp)
tty_port_tty_set(&raw->port, tty);
raw->port.low_latency = 0; /* don't use bottom half for pushing chars */
/*
* Start up 3215 device
*/

1
drivers/s390/char/sclp_tty.c
View File

@ -65,7 +65,6 @@ sclp_tty_open(struct tty_struct *tty, struct file *filp)
{
tty_port_tty_set(&sclp_port, tty);
tty->driver_data = NULL;
sclp_port.low_latency = 0;
return 0;
}

1
drivers/s390/char/sclp_vt220.c
View File

@ -560,7 +560,6 @@ sclp_vt220_open(struct tty_struct *tty, struct file *filp)
{
if (tty->count == 1) {
tty_port_tty_set(&sclp_vt220_port, tty);
sclp_vt220_port.low_latency = 0;
if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
tty->winsize.ws_row = 24;
tty->winsize.ws_col = 80;

2
drivers/s390/char/tty3270.c
View File

@ -967,7 +967,6 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
tty->driver_data = tp;
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;
tp->port.low_latency = 0;
tp->inattr = TF_INPUT;
goto port_install;
}
@ -996,7 +995,6 @@ static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty)
return rc;
}
tp->port.low_latency = 0;
tty->winsize.ws_row = tp->view.rows - 2;
tty->winsize.ws_col = tp->view.cols;

3
drivers/tty/amiserial.c
View File

@ -998,7 +998,6 @@ static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)
state->custom_divisor = ss->custom_divisor;
port->close_delay = ss->close_delay * HZ/100;
port->closing_wait = ss->closing_wait * HZ/100;
port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
check_and_exit:
if (tty_port_initialized(port)) {
@ -1386,8 +1385,6 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
tty->driver_data = info;
tty->port = port;
port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
retval = startup(tty, info);
if (retval) {
return retval;

5
drivers/tty/hvc/hvcs.c
View File

@ -605,7 +605,7 @@ static int hvcs_io(struct hvcs_struct *hvcsd)
hvcsd->todo_mask |= HVCS_QUICK_READ;
spin_unlock_irqrestore(&hvcsd->lock, flags);
/* This is synch because tty->low_latency == 1 */
/* This is synch -- FIXME :js: it is not! */
if(got)
tty_flip_buffer_push(&hvcsd->port);
@ -825,9 +825,6 @@ static int hvcs_remove(struct vio_dev *dev)
unsigned long flags;
struct tty_struct *tty;
if (!hvcsd)
return -ENODEV;
/* By this time the vty-server won't be getting any more interrupts */
spin_lock_irqsave(&hvcsd->lock, flags);

1
drivers/tty/ipwireless/tty.c
View File

@ -101,7 +101,6 @@ static int ipw_open(struct tty_struct *linux_tty, struct file *filp)
tty->port.tty = linux_tty;
linux_tty->driver_data = tty;
tty->port.low_latency = 1;
if (tty->tty_type == TTYTYPE_MODEM)
ipwireless_ppp_open(tty->network);

1
drivers/tty/mxser.c
View File

@ -1273,7 +1273,6 @@ static int mxser_set_serial_info(struct tty_struct *tty,
(ss->flags & ASYNC_FLAGS));
port->close_delay = ss->close_delay * HZ / 100;
port->closing_wait = ss->closing_wait * HZ / 100;
port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
(ss->baud_base != info->baud_base ||
ss->custom_divisor !=

3
drivers/tty/n_gsm.c
View File

@ -2559,7 +2559,8 @@ static void gsmld_write_wakeup(struct tty_struct *tty)
*/
static ssize_t gsmld_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr)
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
{
return -EOPNOTSUPP;
}

60
drivers/tty/n_hdlc.c
View File

@ -416,13 +416,19 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
* Returns the number of bytes returned or error code.
*/
static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
__u8 __user *buf, size_t nr)
__u8 *kbuf, size_t nr,
void **cookie, unsigned long offset)
{
struct n_hdlc *n_hdlc = tty->disc_data;
int ret = 0;
struct n_hdlc_buf *rbuf;
DECLARE_WAITQUEUE(wait, current);
/* Is this a repeated call for an rbuf we already found earlier? */
rbuf = *cookie;
if (rbuf)
goto have_rbuf;
add_wait_queue(&tty->read_wait, &wait);
for (;;) {
@ -436,25 +442,8 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
set_current_state(TASK_INTERRUPTIBLE);
rbuf = n_hdlc_buf_get(&n_hdlc->rx_buf_list);
if (rbuf) {
if (rbuf->count > nr) {
/* too large for caller's buffer */
ret = -EOVERFLOW;
} else {
__set_current_state(TASK_RUNNING);
if (copy_to_user(buf, rbuf->buf, rbuf->count))
ret = -EFAULT;
else
ret = rbuf->count;
}
if (n_hdlc->rx_free_buf_list.count >
DEFAULT_RX_BUF_COUNT)
kfree(rbuf);
else
n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
if (rbuf)
break;
}
/* no data */
if (tty_io_nonblock(tty, file)) {
@ -473,6 +462,39 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
remove_wait_queue(&tty->read_wait, &wait);
__set_current_state(TASK_RUNNING);
if (!rbuf)
return ret;
*cookie = rbuf;
have_rbuf:
/* Have we used it up entirely? */
if (offset >= rbuf->count)
goto done_with_rbuf;
/* More data to go, but can't copy any more? EOVERFLOW */
ret = -EOVERFLOW;
if (!nr)
goto done_with_rbuf;
/* Copy as much data as possible */
ret = rbuf->count - offset;
if (ret > nr)
ret = nr;
memcpy(kbuf, rbuf->buf+offset, ret);
offset += ret;
/* If we still have data left, we leave the rbuf in the cookie */
if (offset < rbuf->count)
return ret;
done_with_rbuf:
*cookie = NULL;
if (n_hdlc->rx_free_buf_list.count > DEFAULT_RX_BUF_COUNT)
kfree(rbuf);
else
n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
return ret;
} /* end of n_hdlc_tty_read() */

3
drivers/tty/n_null.c
View File

@ -20,7 +20,8 @@ static void n_null_close(struct tty_struct *tty)
}
static ssize_t n_null_read(struct tty_struct *tty, struct file *file,
unsigned char __user * buf, size_t nr)
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
{
return -EOPNOTSUPP;
}

10
drivers/tty/n_r3964.c
View File

@ -129,7 +129,7 @@ static void remove_client_block(struct r3964_info *pInfo,
static int r3964_open(struct tty_struct *tty);
static void r3964_close(struct tty_struct *tty);
static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
unsigned char __user * buf, size_t nr);
void *cookie, unsigned char *buf, size_t nr);
static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
const unsigned char *buf, size_t nr);
static int r3964_ioctl(struct tty_struct *tty, struct file *file,
@ -1058,7 +1058,8 @@ static void r3964_close(struct tty_struct *tty)
}
static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
unsigned char __user * buf, size_t nr)
unsigned char *kbuf, size_t nr,
void **cookie, unsigned long offset)
{
struct r3964_info *pInfo = tty->disc_data;
struct r3964_client_info *pClient;
@ -1109,10 +1110,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
kfree(pMsg);
TRACE_M("r3964_read - msg kfree %p", pMsg);
if (copy_to_user(buf, &theMsg, ret)) {
ret = -EFAULT;
goto unlock;
}
memcpy(kbuf, &theMsg, ret);
TRACE_PS("read - return %d", ret);
goto unlock;

4
drivers/tty/n_tracerouter.c
View File

@ -118,7 +118,9 @@ static void n_tracerouter_close(struct tty_struct *tty)
* -EINVAL
*/
static ssize_t n_tracerouter_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr) {
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
{
return -EINVAL;
}

4
drivers/tty/n_tracesink.c
View File

@ -115,7 +115,9 @@ static void n_tracesink_close(struct tty_struct *tty)
* -EINVAL
*/
static ssize_t n_tracesink_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr) {
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
{
return -EINVAL;
}

153
drivers/tty/n_tty.c
View File

@ -164,29 +164,24 @@ static void zero_buffer(struct tty_struct *tty, u8 *buffer, int size)
memset(buffer, 0x00, size);
}
static int tty_copy_to_user(struct tty_struct *tty, void __user *to,
size_t tail, size_t n)
static void tty_copy(struct tty_struct *tty, void *to, size_t tail, size_t n)
{
struct n_tty_data *ldata = tty->disc_data;
size_t size = N_TTY_BUF_SIZE - tail;
void *from = read_buf_addr(ldata, tail);
int uncopied;
if (n > size) {
tty_audit_add_data(tty, from, size);
uncopied = copy_to_user(to, from, size);
zero_buffer(tty, from, size - uncopied);
if (uncopied)
return uncopied;
memcpy(to, from, size);
zero_buffer(tty, from, size);
to += size;
n -= size;
from = ldata->read_buf;
}
tty_audit_add_data(tty, from, n);
uncopied = copy_to_user(to, from, n);
zero_buffer(tty, from, n - uncopied);
return uncopied;
memcpy(to, from, n);
zero_buffer(tty, from, n);
}
/**
@ -1894,8 +1889,10 @@ static void n_tty_close(struct tty_struct *tty)
if (tty->link)
n_tty_packet_mode_flush(tty);
down_write(&tty->termios_rwsem);
vfree(ldata);
tty->disc_data = NULL;
up_write(&tty->termios_rwsem);
}
/**
@ -1944,42 +1941,38 @@ static inline int input_available_p(struct tty_struct *tty, int poll)
/**
* copy_from_read_buf - copy read data directly
* @tty: terminal device
* @b: user data
* @kbp: data
* @nr: size of data
*
* Helper function to speed up n_tty_read. It is only called when
* ICANON is off; it copies characters straight from the tty queue to
* user space directly. It can be profitably called twice; once to
* drain the space from the tail pointer to the (physical) end of the
* buffer, and once to drain the space from the (physical) beginning of
* the buffer to head pointer.
* ICANON is off; it copies characters straight from the tty queue.
*
* Called under the ldata->atomic_read_lock sem
*
* Returns true if it successfully copied data, but there is still
* more data to be had.
*
* n_tty_read()/consumer path:
* caller holds non-exclusive termios_rwsem
* read_tail published
*/
static int copy_from_read_buf(struct tty_struct *tty,
unsigned char __user **b,
static bool copy_from_read_buf(struct tty_struct *tty,
unsigned char **kbp,
size_t *nr)
{
struct n_tty_data *ldata = tty->disc_data;
int retval;
size_t n;
bool is_eof;
size_t head = smp_load_acquire(&ldata->commit_head);
size_t tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1);
retval = 0;
n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail);
n = min(*nr, n);
if (n) {
unsigned char *from = read_buf_addr(ldata, tail);
retval = copy_to_user(*b, from, n);
n -= retval;
memcpy(*kbp, from, n);
is_eof = n == 1 && *from == EOF_CHAR(tty);
tty_audit_add_data(tty, from, n);
zero_buffer(tty, from, n);
@ -1987,22 +1980,25 @@ static int copy_from_read_buf(struct tty_struct *tty,
/* Turn single EOF into zero-length read */
if (L_EXTPROC(tty) && ldata->icanon && is_eof &&
(head == ldata->read_tail))
n = 0;
*b += n;
return false;
*kbp += n;
*nr -= n;
/* If we have more to copy, let the caller know */
return head != ldata->read_tail;
}
return retval;
return false;
}
/**
* canon_copy_from_read_buf - copy read data in canonical mode
* @tty: terminal device
* @b: user data
* @kbp: data
* @nr: size of data
*
* Helper function for n_tty_read. It is only called when ICANON is on;
* it copies one line of input up to and including the line-delimiting
* character into the user-space buffer.
* character into the result buffer.
*
* NB: When termios is changed from non-canonical to canonical mode and
* the read buffer contains data, n_tty_set_termios() simulates an EOF
@ -2017,21 +2013,22 @@ static int copy_from_read_buf(struct tty_struct *tty,
* read_tail published
*/
static int canon_copy_from_read_buf(struct tty_struct *tty,
unsigned char __user **b,
size_t *nr)
static bool canon_copy_from_read_buf(struct tty_struct *tty,
unsigned char **kbp,
size_t *nr)
{
struct n_tty_data *ldata = tty->disc_data;
size_t n, size, more, c;
size_t eol;
size_t tail;
int ret, found = 0;
size_t tail, canon_head;
int found = 0;
/* N.B. avoid overrun if nr == 0 */
if (!*nr)
return 0;
return false;
n = min(*nr + 1, smp_load_acquire(&ldata->canon_head) - ldata->read_tail);
canon_head = smp_load_acquire(&ldata->canon_head);
n = min(*nr + 1, canon_head - ldata->read_tail);
tail = ldata->read_tail & (N_TTY_BUF_SIZE - 1);
size = min_t(size_t, tail + n, N_TTY_BUF_SIZE);
@ -2061,10 +2058,8 @@ static int canon_copy_from_read_buf(struct tty_struct *tty,
n_tty_trace("%s: eol:%zu found:%d n:%zu c:%zu tail:%zu more:%zu\n",
__func__, eol, found, n, c, tail, more);
ret = tty_copy_to_user(tty, *b, tail, n);
if (ret)
return -EFAULT;
*b += n;
tty_copy(tty, *kbp, tail, n);
*kbp += n;
*nr -= n;
if (found)
@ -2077,8 +2072,11 @@ static int canon_copy_from_read_buf(struct tty_struct *tty,
else
ldata->push = 0;
tty_audit_push();
return false;
}
return 0;
/* No EOL found - do a continuation retry if there is more data */
return ldata->read_tail != canon_head;
}
/**
@ -2129,10 +2127,11 @@ static int job_control(struct tty_struct *tty, struct file *file)
*/
static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr)
unsigned char *kbuf, size_t nr,
void **cookie, unsigned long offset)
{
struct n_tty_data *ldata = tty->disc_data;
unsigned char __user *b = buf;
unsigned char *kb = kbuf;
DEFINE_WAIT_FUNC(wait, woken_wake_function);
int c;
int minimum, time;
@ -2141,6 +2140,30 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
int packet;
size_t tail;
/*
* Is this a continuation of a read started earler?
*
* If so, we still hold the atomic_read_lock and the
* termios_rwsem, and can just continue to copy data.
*/
if (*cookie) {
if (ldata->icanon && !L_EXTPROC(tty)) {
if (canon_copy_from_read_buf(tty, &kb, &nr))
return kb - kbuf;
} else {
if (copy_from_read_buf(tty, &kb, &nr))
return kb - kbuf;
}
/* No more data - release locks and stop retries */
n_tty_kick_worker(tty);
n_tty_check_unthrottle(tty);
up_read(&tty->termios_rwsem);
mutex_unlock(&ldata->atomic_read_lock);
*cookie = NULL;
return kb - kbuf;
}
c = job_control(tty, file);
if (c < 0)
return c;
@ -2178,17 +2201,13 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
/* First test for status change. */
if (packet && tty->link->ctrl_status) {
unsigned char cs;
if (b != buf)
if (kb != kbuf)
break;
spin_lock_irq(&tty->link->ctrl_lock);
cs = tty->link->ctrl_status;
tty->link->ctrl_status = 0;
spin_unlock_irq(&tty->link->ctrl_lock);
if (put_user(cs, b)) {
retval = -EFAULT;
break;
}
b++;
*kb++ = cs;
nr--;
break;
}
@ -2231,33 +2250,35 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
}
if (ldata->icanon && !L_EXTPROC(tty)) {
retval = canon_copy_from_read_buf(tty, &b, &nr);
if (retval)
break;
if (canon_copy_from_read_buf(tty, &kb, &nr))
goto more_to_be_read;
} else {
int uncopied;
/* Deal with packet mode. */
if (packet && b == buf) {
if (put_user(TIOCPKT_DATA, b)) {
retval = -EFAULT;
break;
}
b++;
if (packet && kb == kbuf) {
*kb++ = TIOCPKT_DATA;
nr--;
}
uncopied = copy_from_read_buf(tty, &b, &nr);
uncopied += copy_from_read_buf(tty, &b, &nr);
if (uncopied) {
retval = -EFAULT;
break;
/*
* Copy data, and if there is more to be had
* and we have nothing more to wait for, then
* let's mark us for retries.
*
* NOTE! We return here with both the termios_sem
* and atomic_read_lock still held, the retries
* will release them when done.
*/
if (copy_from_read_buf(tty, &kb, &nr) && kb - kbuf >= minimum) {
more_to_be_read:
remove_wait_queue(&tty->read_wait, &wait);
*cookie = cookie;
return kb - kbuf;
}
}
n_tty_check_unthrottle(tty);
if (b - buf >= minimum)
if (kb - kbuf >= minimum)
break;
if (time)
timeout = time;
@ -2269,8 +2290,8 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
remove_wait_queue(&tty->read_wait, &wait);
mutex_unlock(&ldata->atomic_read_lock);
if (b - buf)
retval = b - buf;
if (kb - kbuf)
retval = kb - kbuf;
return retval;
}

16
drivers/tty/pty.c
View File

@ -45,7 +45,6 @@ static DEFINE_MUTEX(devpts_mutex);
static void pty_close(struct tty_struct *tty, struct file *filp)
{
BUG_ON(!tty);
if (tty->driver->subtype == PTY_TYPE_MASTER)
WARN_ON(tty->count > 1);
else {
@ -67,7 +66,8 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
wake_up_interruptible(&tty->link->read_wait);
wake_up_interruptible(&tty->link->write_wait);
if (tty->driver->subtype == PTY_TYPE_MASTER) {
set_bit(TTY_OTHER_CLOSED, &tty->flags);
struct file *f;
#ifdef CONFIG_UNIX98_PTYS
if (tty->driver == ptm_driver) {
mutex_lock(&devpts_mutex);
@ -76,7 +76,17 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
mutex_unlock(&devpts_mutex);
}
#endif
tty_vhangup(tty->link);
/*
* This hack is required because a program can open a
* pty and redirect a console to it, but if the pty is
* closed and the console is not released, then the
* slave side will never close. So release the
* redirect when the master closes.
*/
f = tty_release_redirect(tty->link);
if (f)
fput(f);
}
}

11
drivers/tty/serial/8250/8250_tegra.c
View File

@ -26,16 +26,17 @@ static void tegra_uart_handle_break(struct uart_port *p)
{
unsigned int status, tmout = 10000;
do {
while (1) {
status = p->serial_in(p, UART_LSR);
if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
status = p->serial_in(p, UART_RX);
else
if (!(status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS)))
break;
p->serial_in(p, UART_RX);
if (--tmout == 0)
break;
udelay(1);
} while (1);
}
}
static int tegra_uart_probe(struct platform_device *pdev)

42
drivers/tty/serial/Kconfig
View File

@ -276,28 +276,6 @@ config SERIAL_SAMSUNG_CONSOLE
your boot loader about how to pass options to the kernel at
boot time.)
config SERIAL_SIRFSOC
tristate "SiRF SoC Platform Serial port support"
depends on ARCH_SIRF
select SERIAL_CORE
help
Support for the on-chip UART on the CSR SiRFprimaII series,
providing /dev/ttySiRF0, 1 and 2 (note, some machines may not
provide all of these ports, depending on how the serial port
pins are configured).
config SERIAL_SIRFSOC_CONSOLE
bool "Support for console on SiRF SoC serial port"
depends on SERIAL_SIRFSOC=y
select SERIAL_CORE_CONSOLE
help
Even if you say Y here, the currently visible virtual console
(/dev/tty0) will still be used as the system console by default, but
you can alter that using a kernel command line option such as
"console=ttySiRFx". (Try "man bootparam" or see the documentation of
your boot loader about how to pass options to the kernel at
boot time.)
config SERIAL_TEGRA
tristate "NVIDIA Tegra20/30 SoC serial controller"
depends on ARCH_TEGRA && TEGRA20_APB_DMA
@ -1204,13 +1182,6 @@ config SERIAL_ALTERA_UART_CONSOLE
help
Enable a Altera UART port to be the system console.
config SERIAL_IFX6X60
tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)"
depends on GPIOLIB || COMPILE_TEST
depends on SPI && HAS_DMA
help
Support for the IFX6x60 modem devices on Intel MID platforms.
config SERIAL_PCH_UART
tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) UART"
depends on PCI && (X86_32 || MIPS || COMPILE_TEST)
@ -1295,14 +1266,6 @@ config SERIAL_AR933X_NR_UARTS
Set this to the number of serial ports you want the driver
to support.
config SERIAL_EFM32_UART
tristate "EFM32 UART/USART port"
depends on ARM && (ARCH_EFM32 || COMPILE_TEST)
select SERIAL_CORE
help
This driver support the USART and UART ports on
Energy Micro's efm32 SoCs.
config SERIAL_MPS2_UART_CONSOLE
bool "MPS2 UART console support"
depends on SERIAL_MPS2_UART
@ -1316,11 +1279,6 @@ config SERIAL_MPS2_UART
help
This driver support the UART ports on ARM MPS2.
config SERIAL_EFM32_UART_CONSOLE
bool "EFM32 UART/USART console support"
depends on SERIAL_EFM32_UART=y
select SERIAL_CORE_CONSOLE
config SERIAL_ARC
tristate "ARC UART driver support"
select SERIAL_CORE

3
drivers/tty/serial/Makefile
View File

@ -64,16 +64,13 @@ obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o
obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o
obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o
obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o
obj-$(CONFIG_SERIAL_IFX6X60) += ifx6x60.o
obj-$(CONFIG_SERIAL_PCH_UART) += pch_uart.o
obj-$(CONFIG_SERIAL_MXS_AUART) += mxs-auart.o
obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o
obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
obj-$(CONFIG_SERIAL_TEGRA) += serial-tegra.o
obj-$(CONFIG_SERIAL_TEGRA_TCU) += tegra-tcu.o
obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o
obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o
obj-$(CONFIG_SERIAL_ARC) += arc_uart.o
obj-$(CONFIG_SERIAL_RP2) += rp2.o
obj-$(CONFIG_SERIAL_FSL_LPUART) += fsl_lpuart.o

43
drivers/tty/serial/cpm_uart/cpm_uart_core.c
View File

@ -499,8 +499,7 @@ static void cpm_uart_set_termios(struct uart_port *port,
pr_debug("CPM uart[%d]:set_termios\n", port->line);
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
if (baud < HW_BUF_SPD_THRESHOLD ||
(pinfo->port.state && pinfo->port.state->port.low_latency))
if (baud < HW_BUF_SPD_THRESHOLD || port->flags & UPF_LOW_LATENCY)
pinfo->rx_fifosize = 1;
else
pinfo->rx_fifosize = RX_BUF_SIZE;
@ -1107,6 +1106,32 @@ static void cpm_put_poll_char(struct uart_port *port,
ch[0] = (char)c;
cpm_uart_early_write(pinfo, ch, 1, false);
}
static struct uart_port *udbg_port;
static void udbg_cpm_putc(char c)
{
if (c == '\n')
cpm_put_poll_char(udbg_port, '\r');
cpm_put_poll_char(udbg_port, c);
}
static int udbg_cpm_getc_poll(void)
{
int c = cpm_get_poll_char(udbg_port);
return c == NO_POLL_CHAR ? -1 : c;
}
static int udbg_cpm_getc(void)
{
int c;
while ((c = udbg_cpm_getc_poll()) == -1)
cpu_relax();
return c;
}
#endif /* CONFIG_CONSOLE_POLL */
static const struct uart_ops cpm_uart_pops = {
@ -1237,7 +1262,10 @@ static int cpm_uart_init_port(struct device_node *np,
}
#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
udbg_putc = NULL;
#ifdef CONFIG_CONSOLE_POLL
if (!udbg_port)
#endif
udbg_putc = NULL;
#endif
return cpm_uart_request_port(&pinfo->port);
@ -1358,6 +1386,15 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
uart_set_options(port, co, baud, parity, bits, flow);
cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX);
#ifdef CONFIG_CONSOLE_POLL
if (!udbg_port) {
udbg_port = &pinfo->port;
udbg_putc = udbg_cpm_putc;
udbg_getc = udbg_cpm_getc;
udbg_getc_poll = udbg_cpm_getc_poll;
}
#endif
return 0;
}

852
drivers/tty/serial/efm32-uart.c
View File

@ -1,852 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/serial_core.h>
#include <linux/tty_flip.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_data/efm32-uart.h>
#define DRIVER_NAME "efm32-uart"
#define DEV_NAME "ttyefm"
#define UARTn_CTRL 0x00
#define UARTn_CTRL_SYNC 0x0001
#define UARTn_CTRL_TXBIL 0x1000
#define UARTn_FRAME 0x04
#define UARTn_FRAME_DATABITS__MASK 0x000f
#define UARTn_FRAME_DATABITS(n) ((n) - 3)
#define UARTn_FRAME_PARITY__MASK 0x0300
#define UARTn_FRAME_PARITY_NONE 0x0000
#define UARTn_FRAME_PARITY_EVEN 0x0200
#define UARTn_FRAME_PARITY_ODD 0x0300
#define UARTn_FRAME_STOPBITS_HALF 0x0000
#define UARTn_FRAME_STOPBITS_ONE 0x1000
#define UARTn_FRAME_STOPBITS_TWO 0x3000
#define UARTn_CMD 0x0c
#define UARTn_CMD_RXEN 0x0001
#define UARTn_CMD_RXDIS 0x0002
#define UARTn_CMD_TXEN 0x0004
#define UARTn_CMD_TXDIS 0x0008
#define UARTn_STATUS 0x10
#define UARTn_STATUS_TXENS 0x0002
#define UARTn_STATUS_TXC 0x0020
#define UARTn_STATUS_TXBL 0x0040
#define UARTn_STATUS_RXDATAV 0x0080
#define UARTn_CLKDIV 0x14
#define UARTn_RXDATAX 0x18
#define UARTn_RXDATAX_RXDATA__MASK 0x01ff
#define UARTn_RXDATAX_PERR 0x4000
#define UARTn_RXDATAX_FERR 0x8000
/*
* This is a software only flag used for ignore_status_mask and
* read_status_mask! It's used for breaks that the hardware doesn't report
* explicitly.
*/
#define SW_UARTn_RXDATAX_BERR 0x2000
#define UARTn_TXDATA 0x34
#define UARTn_IF 0x40
#define UARTn_IF_TXC 0x0001
#define UARTn_IF_TXBL 0x0002
#define UARTn_IF_RXDATAV 0x0004
#define UARTn_IF_RXOF 0x0010
#define UARTn_IFS 0x44
#define UARTn_IFC 0x48
#define UARTn_IEN 0x4c
#define UARTn_ROUTE 0x54
#define UARTn_ROUTE_LOCATION__MASK 0x0700
#define UARTn_ROUTE_LOCATION(n) (((n) << 8) & UARTn_ROUTE_LOCATION__MASK)
#define UARTn_ROUTE_RXPEN 0x0001
#define UARTn_ROUTE_TXPEN 0x0002
struct efm32_uart_port {
struct uart_port port;
unsigned int txirq;
struct clk *clk;
struct efm32_uart_pdata pdata;
};
#define to_efm_port(_port) container_of(_port, struct efm32_uart_port, port)
#define efm_debug(efm_port, format, arg...) \
dev_dbg(efm_port->port.dev, format, ##arg)
static void efm32_uart_write32(struct efm32_uart_port *efm_port,
u32 value, unsigned offset)
{
writel_relaxed(value, efm_port->port.membase + offset);
}
static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,
unsigned offset)
{
return readl_relaxed(efm_port->port.membase + offset);
}
static unsigned int efm32_uart_tx_empty(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
if (status & UARTn_STATUS_TXC)
return TIOCSER_TEMT;
else
return 0;
}
static void efm32_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
/* sorry, neither handshaking lines nor loop functionallity */
}
static unsigned int efm32_uart_get_mctrl(struct uart_port *port)
{
/* sorry, no handshaking lines available */
return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR;
}
static void efm32_uart_stop_tx(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 ien = efm32_uart_read32(efm_port, UARTn_IEN);
efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
ien &= ~(UARTn_IF_TXC | UARTn_IF_TXBL);
efm32_uart_write32(efm_port, ien, UARTn_IEN);
}
static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)
{
struct uart_port *port = &efm_port->port;
struct circ_buf *xmit = &port->state->xmit;
while (efm32_uart_read32(efm_port, UARTn_STATUS) &
UARTn_STATUS_TXBL) {
if (port->x_char) {
port->icount.tx++;
efm32_uart_write32(efm_port, port->x_char,
UARTn_TXDATA);
port->x_char = 0;
continue;
}
if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
port->icount.tx++;
efm32_uart_write32(efm_port, xmit->buf[xmit->tail],
UARTn_TXDATA);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
} else
break;
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (!port->x_char && uart_circ_empty(xmit) &&
efm32_uart_read32(efm_port, UARTn_STATUS) &
UARTn_STATUS_TXC)
efm32_uart_stop_tx(port);
}
static void efm32_uart_start_tx(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 ien;
efm32_uart_write32(efm_port,
UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IFC);
ien = efm32_uart_read32(efm_port, UARTn_IEN);
efm32_uart_write32(efm_port,
ien | UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IEN);
efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
efm32_uart_tx_chars(efm_port);
}
static void efm32_uart_stop_rx(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);
}
static void efm32_uart_break_ctl(struct uart_port *port, int ctl)
{
/* not possible without fiddling with gpios */
}
static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)
{
struct uart_port *port = &efm_port->port;
while (efm32_uart_read32(efm_port, UARTn_STATUS) &
UARTn_STATUS_RXDATAV) {
u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);
int flag = 0;
/*
* This is a reserved bit and I only saw it read as 0. But to be
* sure not to be confused too much by new devices adhere to the
* warning in the reference manual that reserved bits might
* read as 1 in the future.
*/
rxdata &= ~SW_UARTn_RXDATAX_BERR;
port->icount.rx++;
if ((rxdata & UARTn_RXDATAX_FERR) &&
!(rxdata & UARTn_RXDATAX_RXDATA__MASK)) {
rxdata |= SW_UARTn_RXDATAX_BERR;
port->icount.brk++;
if (uart_handle_break(port))
continue;
} else if (rxdata & UARTn_RXDATAX_PERR)
port->icount.parity++;
else if (rxdata & UARTn_RXDATAX_FERR)
port->icount.frame++;
rxdata &= port->read_status_mask;
if (rxdata & SW_UARTn_RXDATAX_BERR)
flag = TTY_BREAK;
else if (rxdata & UARTn_RXDATAX_PERR)
flag = TTY_PARITY;
else if (rxdata & UARTn_RXDATAX_FERR)
flag = TTY_FRAME;
else if (uart_handle_sysrq_char(port,
rxdata & UARTn_RXDATAX_RXDATA__MASK))
continue;
if ((rxdata & port->ignore_status_mask) == 0)
tty_insert_flip_char(&port->state->port,
rxdata & UARTn_RXDATAX_RXDATA__MASK, flag);
}
}
static irqreturn_t efm32_uart_rxirq(int irq, void *data)
{
struct efm32_uart_port *efm_port = data;
u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
int handled = IRQ_NONE;
struct uart_port *port = &efm_port->port;
struct tty_port *tport = &port->state->port;
spin_lock(&port->lock);
if (irqflag & UARTn_IF_RXDATAV) {
efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);
efm32_uart_rx_chars(efm_port);
handled = IRQ_HANDLED;
}
if (irqflag & UARTn_IF_RXOF) {
efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);
port->icount.overrun++;
tty_insert_flip_char(tport, 0, TTY_OVERRUN);
handled = IRQ_HANDLED;
}
spin_unlock(&port->lock);
tty_flip_buffer_push(tport);
return handled;
}
static irqreturn_t efm32_uart_txirq(int irq, void *data)
{
struct efm32_uart_port *efm_port = data;
u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
/* TXBL doesn't need to be cleared */
if (irqflag & UARTn_IF_TXC)
efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);
if (irqflag & (UARTn_IF_TXC | UARTn_IF_TXBL)) {
efm32_uart_tx_chars(efm_port);
return IRQ_HANDLED;
} else
return IRQ_NONE;
}
static int efm32_uart_startup(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
int ret;
ret = clk_enable(efm_port->clk);
if (ret) {
efm_debug(efm_port, "failed to enable clk\n");
goto err_clk_enable;
}
port->uartclk = clk_get_rate(efm_port->clk);
/* Enable pins at configured location */
efm32_uart_write32(efm_port,
UARTn_ROUTE_LOCATION(efm_port->pdata.location) |
UARTn_ROUTE_RXPEN | UARTn_ROUTE_TXPEN,
UARTn_ROUTE);
ret = request_irq(port->irq, efm32_uart_rxirq, 0,
DRIVER_NAME, efm_port);
if (ret) {
efm_debug(efm_port, "failed to register rxirq\n");
goto err_request_irq_rx;
}
/* disable all irqs */
efm32_uart_write32(efm_port, 0, UARTn_IEN);
ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,
DRIVER_NAME, efm_port);
if (ret) {
efm_debug(efm_port, "failed to register txirq\n");
free_irq(port->irq, efm_port);
err_request_irq_rx:
clk_disable(efm_port->clk);
} else {
efm32_uart_write32(efm_port,
UARTn_IF_RXDATAV | UARTn_IF_RXOF, UARTn_IEN);
efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);
}
err_clk_enable:
return ret;
}
static void efm32_uart_shutdown(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
efm32_uart_write32(efm_port, 0, UARTn_IEN);
free_irq(port->irq, efm_port);
clk_disable(efm_port->clk);
}
static void efm32_uart_set_termios(struct uart_port *port,
struct ktermios *new, struct ktermios *old)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
unsigned long flags;
unsigned baud;
u32 clkdiv;
u32 frame = 0;
/* no modem control lines */
new->c_cflag &= ~(CRTSCTS | CMSPAR);
baud = uart_get_baud_rate(port, new, old,
DIV_ROUND_CLOSEST(port->uartclk, 16 * 8192),
DIV_ROUND_CLOSEST(port->uartclk, 16));
switch (new->c_cflag & CSIZE) {
case CS5:
frame |= UARTn_FRAME_DATABITS(5);
break;
case CS6:
frame |= UARTn_FRAME_DATABITS(6);
break;
case CS7:
frame |= UARTn_FRAME_DATABITS(7);
break;
case CS8:
frame |= UARTn_FRAME_DATABITS(8);
break;
}
if (new->c_cflag & CSTOPB)
/* the receiver only verifies the first stop bit */
frame |= UARTn_FRAME_STOPBITS_TWO;
else
frame |= UARTn_FRAME_STOPBITS_ONE;
if (new->c_cflag & PARENB) {
if (new->c_cflag & PARODD)
frame |= UARTn_FRAME_PARITY_ODD;
else
frame |= UARTn_FRAME_PARITY_EVEN;
} else
frame |= UARTn_FRAME_PARITY_NONE;
/*
* the 6 lowest bits of CLKDIV are dc, bit 6 has value 0.25.
* port->uartclk <= 14e6, so 4 * port->uartclk doesn't overflow.
*/
clkdiv = (DIV_ROUND_CLOSEST(4 * port->uartclk, 16 * baud) - 4) << 6;
spin_lock_irqsave(&port->lock, flags);
efm32_uart_write32(efm_port,
UARTn_CMD_TXDIS | UARTn_CMD_RXDIS, UARTn_CMD);
port->read_status_mask = UARTn_RXDATAX_RXDATA__MASK;
if (new->c_iflag & INPCK)
port->read_status_mask |=
UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
if (new->c_iflag & (IGNBRK | BRKINT | PARMRK))
port->read_status_mask |= SW_UARTn_RXDATAX_BERR;
port->ignore_status_mask = 0;
if (new->c_iflag & IGNPAR)
port->ignore_status_mask |=
UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
if (new->c_iflag & IGNBRK)
port->ignore_status_mask |= SW_UARTn_RXDATAX_BERR;
uart_update_timeout(port, new->c_cflag, baud);
efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);
efm32_uart_write32(efm_port, frame, UARTn_FRAME);
efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);
efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,
UARTn_CMD);
spin_unlock_irqrestore(&port->lock, flags);
}
static const char *efm32_uart_type(struct uart_port *port)
{
return port->type == PORT_EFMUART ? "efm32-uart" : NULL;
}
static void efm32_uart_release_port(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
clk_unprepare(efm_port->clk);
clk_put(efm_port->clk);
iounmap(port->membase);
}
static int efm32_uart_request_port(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
int ret;
port->membase = ioremap(port->mapbase, 60);
if (!efm_port->port.membase) {
ret = -ENOMEM;
efm_debug(efm_port, "failed to remap\n");
goto err_ioremap;
}
efm_port->clk = clk_get(port->dev, NULL);
if (IS_ERR(efm_port->clk)) {
ret = PTR_ERR(efm_port->clk);
efm_debug(efm_port, "failed to get clock\n");
goto err_clk_get;
}
ret = clk_prepare(efm_port->clk);
if (ret) {
clk_put(efm_port->clk);
err_clk_get:
iounmap(port->membase);
err_ioremap:
return ret;
}
return 0;
}
static void efm32_uart_config_port(struct uart_port *port, int type)
{
if (type & UART_CONFIG_TYPE &&
!efm32_uart_request_port(port))
port->type = PORT_EFMUART;
}
static int efm32_uart_verify_port(struct uart_port *port,
struct serial_struct *serinfo)
{
int ret = 0;
if (serinfo->type != PORT_UNKNOWN && serinfo->type != PORT_EFMUART)
ret = -EINVAL;
return ret;
}
static const struct uart_ops efm32_uart_pops = {
.tx_empty = efm32_uart_tx_empty,
.set_mctrl = efm32_uart_set_mctrl,
.get_mctrl = efm32_uart_get_mctrl,
.stop_tx = efm32_uart_stop_tx,
.start_tx = efm32_uart_start_tx,
.stop_rx = efm32_uart_stop_rx,
.break_ctl = efm32_uart_break_ctl,
.startup = efm32_uart_startup,
.shutdown = efm32_uart_shutdown,
.set_termios = efm32_uart_set_termios,
.type = efm32_uart_type,
.release_port = efm32_uart_release_port,
.request_port = efm32_uart_request_port,
.config_port = efm32_uart_config_port,
.verify_port = efm32_uart_verify_port,
};
static struct efm32_uart_port *efm32_uart_ports[5];
#ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE
static void efm32_uart_console_putchar(struct uart_port *port, int ch)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
unsigned int timeout = 0x400;
u32 status;
while (1) {
status = efm32_uart_read32(efm_port, UARTn_STATUS);
if (status & UARTn_STATUS_TXBL)
break;
if (!timeout--)
return;
}
efm32_uart_write32(efm_port, ch, UARTn_TXDATA);
}
static void efm32_uart_console_write(struct console *co, const char *s,
unsigned int count)
{
struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];
u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
unsigned int timeout = 0x400;
if (!(status & UARTn_STATUS_TXENS))
efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
uart_console_write(&efm_port->port, s, count,
efm32_uart_console_putchar);
/* Wait for the transmitter to become empty */
while (1) {
u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
if (status & UARTn_STATUS_TXC)
break;
if (!timeout--)
break;
}
if (!(status & UARTn_STATUS_TXENS))
efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
}
static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,
int *baud, int *parity, int *bits)
{
u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);
u32 route, clkdiv, frame;
if (ctrl & UARTn_CTRL_SYNC)
/* not operating in async mode */
return;
route = efm32_uart_read32(efm_port, UARTn_ROUTE);
if (!(route & UARTn_ROUTE_TXPEN))
/* tx pin not routed */
return;
clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);
*baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,
16 * (4 + (clkdiv >> 6)));
frame = efm32_uart_read32(efm_port, UARTn_FRAME);
switch (frame & UARTn_FRAME_PARITY__MASK) {
case UARTn_FRAME_PARITY_ODD:
*parity = 'o';
break;
case UARTn_FRAME_PARITY_EVEN:
*parity = 'e';
break;
default:
*parity = 'n';
}
*bits = (frame & UARTn_FRAME_DATABITS__MASK) -
UARTn_FRAME_DATABITS(4) + 4;
efm_debug(efm_port, "get_opts: options=%d%c%d\n",
*baud, *parity, *bits);
}
static int efm32_uart_console_setup(struct console *co, char *options)
{
struct efm32_uart_port *efm_port;
int baud = 115200;
int bits = 8;
int parity = 'n';
int flow = 'n';
int ret;
if (co->index < 0 || co->index >= ARRAY_SIZE(efm32_uart_ports)) {
unsigned i;
for (i = 0; i < ARRAY_SIZE(efm32_uart_ports); ++i) {
if (efm32_uart_ports[i]) {
pr_warn("efm32-console: fall back to console index %u (from %hhi)\n",
i, co->index);
co->index = i;
break;
}
}
}
efm_port = efm32_uart_ports[co->index];
if (!efm_port) {
pr_warn("efm32-console: No port at %d\n", co->index);
return -ENODEV;
}
ret = clk_prepare(efm_port->clk);
if (ret) {
dev_warn(efm_port->port.dev,
"console: clk_prepare failed: %d\n", ret);
return ret;
}
efm_port->port.uartclk = clk_get_rate(efm_port->clk);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
efm32_uart_console_get_options(efm_port,
&baud, &parity, &bits);
return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);
}
static struct uart_driver efm32_uart_reg;
static struct console efm32_uart_console = {
.name = DEV_NAME,
.write = efm32_uart_console_write,
.device = uart_console_device,
.setup = efm32_uart_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
.data = &efm32_uart_reg,
};
#else
#define efm32_uart_console (*(struct console *)NULL)
#endif /* ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE / else */
static struct uart_driver efm32_uart_reg = {
.owner = THIS_MODULE,
.driver_name = DRIVER_NAME,
.dev_name = DEV_NAME,
.nr = ARRAY_SIZE(efm32_uart_ports),
.cons = &efm32_uart_console,
};
static int efm32_uart_probe_dt(struct platform_device *pdev,
struct efm32_uart_port *efm_port)
{
struct device_node *np = pdev->dev.of_node;
u32 location;
int ret;
if (!np)
return 1;
ret = of_property_read_u32(np, "energymicro,location", &location);
if (ret)
/* fall back to wrongly namespaced property */
ret = of_property_read_u32(np, "efm32,location", &location);
if (ret)
/* fall back to old and (wrongly) generic property "location" */
ret = of_property_read_u32(np, "location", &location);
if (!ret) {
if (location > 5) {
dev_err(&pdev->dev, "invalid location\n");
return -EINVAL;
}
efm_debug(efm_port, "using location %u\n", location);
efm_port->pdata.location = location;
} else {
efm_debug(efm_port, "fall back to location 0\n");
}
ret = of_alias_get_id(np, "serial");
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
return ret;
} else {
efm_port->port.line = ret;
return 0;
}
}
static int efm32_uart_probe(struct platform_device *pdev)
{
struct efm32_uart_port *efm_port;
struct resource *res;
unsigned int line;
int ret;
efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);
if (!efm_port) {
dev_dbg(&pdev->dev, "failed to allocate private data\n");
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
dev_dbg(&pdev->dev, "failed to determine base address\n");
goto err_get_base;
}
if (resource_size(res) < 60) {
ret = -EINVAL;
dev_dbg(&pdev->dev, "memory resource too small\n");
goto err_too_small;
}
ret = platform_get_irq(pdev, 0);
if (ret <= 0) {
dev_dbg(&pdev->dev, "failed to get rx irq\n");
goto err_get_rxirq;
}
efm_port->port.irq = ret;
ret = platform_get_irq(pdev, 1);
if (ret <= 0)
ret = efm_port->port.irq + 1;
efm_port->txirq = ret;
efm_port->port.dev = &pdev->dev;
efm_port->port.mapbase = res->start;
efm_port->port.type = PORT_EFMUART;
efm_port->port.iotype = UPIO_MEM32;
efm_port->port.fifosize = 2;
efm_port->port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_EFM32_UART_CONSOLE);
efm_port->port.ops = &efm32_uart_pops;
efm_port->port.flags = UPF_BOOT_AUTOCONF;
ret = efm32_uart_probe_dt(pdev, efm_port);
if (ret > 0) {
/* not created by device tree */
const struct efm32_uart_pdata *pdata = dev_get_platdata(&pdev->dev);
efm_port->port.line = pdev->id;
if (pdata)
efm_port->pdata = *pdata;
} else if (ret < 0)
goto err_probe_dt;
line = efm_port->port.line;
if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
efm32_uart_ports[line] = efm_port;
ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);
if (ret) {
dev_dbg(&pdev->dev, "failed to add port: %d\n", ret);
if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
efm32_uart_ports[line] = NULL;
err_probe_dt:
err_get_rxirq:
err_too_small:
err_get_base:
kfree(efm_port);
} else {
platform_set_drvdata(pdev, efm_port);
dev_dbg(&pdev->dev, "\\o/\n");
}
return ret;
}
static int efm32_uart_remove(struct platform_device *pdev)
{
struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);
unsigned int line = efm_port->port.line;
uart_remove_one_port(&efm32_uart_reg, &efm_port->port);
if (line >= 0 && line < ARRAY_SIZE(efm32_uart_ports))
efm32_uart_ports[line] = NULL;
kfree(efm_port);
return 0;
}
static const struct of_device_id efm32_uart_dt_ids[] = {
{
.compatible = "energymicro,efm32-uart",
}, {
/* doesn't follow the "vendor,device" scheme, don't use */
.compatible = "efm32,uart",
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids);
static struct platform_driver efm32_uart_driver = {
.probe = efm32_uart_probe,
.remove = efm32_uart_remove,
.driver = {
.name = DRIVER_NAME,
.of_match_table = efm32_uart_dt_ids,
},
};
static int __init efm32_uart_init(void)
{
int ret;
ret = uart_register_driver(&efm32_uart_reg);
if (ret)
return ret;
ret = platform_driver_register(&efm32_uart_driver);
if (ret)
uart_unregister_driver(&efm32_uart_reg);
pr_info("EFM32 UART/USART driver\n");
return ret;
}
module_init(efm32_uart_init);
static void __exit efm32_uart_exit(void)
{
platform_driver_unregister(&efm32_uart_driver);
uart_unregister_driver(&efm32_uart_reg);
}
module_exit(efm32_uart_exit);
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
MODULE_DESCRIPTION("EFM32 UART/USART driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRIVER_NAME);

4
drivers/tty/serial/fsl_lpuart.c
View File

@ -2580,9 +2580,7 @@ static struct uart_driver lpuart_reg = {
static int lpuart_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id = of_match_device(lpuart_dt_ids,
&pdev->dev);
const struct lpuart_soc_data *sdata = of_id->data;
const struct lpuart_soc_data *sdata = of_device_get_match_data(&pdev->dev);
struct device_node *np = pdev->dev.of_node;
struct lpuart_port *sport;
struct resource *res;

4
drivers/tty/serial/icom.c
View File

@ -118,7 +118,7 @@ MODULE_DEVICE_TABLE(pci, icom_pci_table);
static LIST_HEAD(icom_adapter_head);
/* spinlock for adapter initialization and changing adapter operations */
static spinlock_t icom_lock;
static DEFINE_SPINLOCK(icom_lock);
#ifdef ICOM_TRACE
static inline void trace(struct icom_port *icom_port, char *trace_pt,
@ -1616,8 +1616,6 @@ static int __init icom_init(void)
{
int ret;
spin_lock_init(&icom_lock);
ret = uart_register_driver(&icom_uart_driver);
if (ret)
return ret;

1390
drivers/tty/serial/ifx6x60.c
View File

File diff suppressed because it is too large Load Diff

118
drivers/tty/serial/ifx6x60.h
View File

@ -1,118 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/****************************************************************************
*
* Driver for the IFX spi modem.
*
* Copyright (C) 2009, 2010 Intel Corp
* Jim Stanley <jim.stanley@intel.com>
*
*****************************************************************************/
#ifndef _IFX6X60_H
#define _IFX6X60_H
struct gpio_desc;
#define DRVNAME "ifx6x60"
#define TTYNAME "ttyIFX"
#define IFX_SPI_MAX_MINORS 1
#define IFX_SPI_TRANSFER_SIZE 2048
#define IFX_SPI_FIFO_SIZE 4096
#define IFX_SPI_HEADER_OVERHEAD 4
#define IFX_RESET_TIMEOUT msecs_to_jiffies(50)
/* device flags bitfield definitions */
#define IFX_SPI_STATE_PRESENT 0
#define IFX_SPI_STATE_IO_IN_PROGRESS 1
#define IFX_SPI_STATE_IO_READY 2
#define IFX_SPI_STATE_TIMER_PENDING 3
#define IFX_SPI_STATE_IO_AVAILABLE 4
/* flow control bitfields */
#define IFX_SPI_DCD 0
#define IFX_SPI_CTS 1
#define IFX_SPI_DSR 2
#define IFX_SPI_RI 3
#define IFX_SPI_DTR 4
#define IFX_SPI_RTS 5
#define IFX_SPI_TX_FC 6
#define IFX_SPI_RX_FC 7
#define IFX_SPI_UPDATE 8
#define IFX_SPI_PAYLOAD_SIZE (IFX_SPI_TRANSFER_SIZE - \
IFX_SPI_HEADER_OVERHEAD)
#define IFX_SPI_IRQ_TYPE DETECT_EDGE_RISING
#define IFX_SPI_GPIO_TARGET 0
#define IFX_SPI_GPIO0 0x105
#define IFX_SPI_STATUS_TIMEOUT (2000*HZ)
/* values for bits in power status byte */
#define IFX_SPI_POWER_DATA_PENDING 1
#define IFX_SPI_POWER_SRDY 2
struct ifx_spi_device {
/* Our SPI device */
struct spi_device *spi_dev;
/* Port specific data */
struct kfifo tx_fifo;
spinlock_t fifo_lock;
unsigned long signal_state;
/* TTY Layer logic */
struct tty_port tty_port;
struct device *tty_dev;
int minor;
/* Low level I/O work */
struct tasklet_struct io_work_tasklet;
unsigned long flags;
dma_addr_t rx_dma;
dma_addr_t tx_dma;
int modem; /* Modem type */
int use_dma; /* provide dma-able addrs in SPI msg */
long max_hz; /* max SPI frequency */
spinlock_t write_lock;
int write_pending;
spinlock_t power_lock;
unsigned char power_status;
unsigned char *rx_buffer;
unsigned char *tx_buffer;
dma_addr_t rx_bus;
dma_addr_t tx_bus;
unsigned char spi_more;
unsigned char spi_slave_cts;
struct timer_list spi_timer;
struct spi_message spi_msg;
struct spi_transfer spi_xfer;
struct {
/* gpio lines */
struct gpio_desc *srdy; /* slave-ready gpio */
struct gpio_desc *mrdy; /* master-ready gpio */
struct gpio_desc *reset; /* modem-reset gpio */
struct gpio_desc *po; /* modem-on gpio */
struct gpio_desc *reset_out; /* modem-in-reset gpio */
struct gpio_desc *pmu_reset; /* PMU reset gpio */
/* state/stats */
int unack_srdy_int_nb;
} gpio;
/* modem reset */
unsigned long mdm_reset_state;
#define MR_START 0
#define MR_INPROGRESS 1
#define MR_COMPLETE 2
wait_queue_head_t mdm_reset_wait;
void (*swap_buf)(unsigned char *buf, int len, void *end);
};
#endif /* _IFX6X60_H */

2
drivers/tty/serial/imx.c
View File

@ -2248,7 +2248,7 @@ static int imx_uart_probe(struct platform_device *pdev)
sport->port.dev = &pdev->dev;
sport->port.mapbase = res->start;
sport->port.membase = base;
sport->port.type = PORT_IMX,
sport->port.type = PORT_IMX;
sport->port.iotype = UPIO_MEM;
sport->port.irq = rxirq;
sport->port.fifosize = 32;

2
drivers/tty/serial/lantiq.c
View File

@ -876,7 +876,7 @@ static int lqasc_probe(struct platform_device *pdev)
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
port->ops = &lqasc_pops;
port->fifosize = 16;
port->type = PORT_LTQ_ASC,
port->type = PORT_LTQ_ASC;
port->line = line;
port->dev = &pdev->dev;
/* unused, just to be backward-compatible */

3
drivers/tty/serial/max3100.c
View File

@ -521,9 +521,6 @@ max3100_set_termios(struct uart_port *port, struct ktermios *termios,
MAX3100_STATUS_PE | MAX3100_STATUS_FE |
MAX3100_STATUS_OE;
/* we are sending char from a workqueue so enable */
s->port.state->port.low_latency = 1;
if (s->poll_time > 0)
del_timer_sync(&s->timer);

45
drivers/tty/serial/mxs-auart.c
View File

@ -34,8 +34,6 @@
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <asm/cacheflush.h>
#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/irq.h>
@ -1535,34 +1533,6 @@ disable_clk_ahb:
return err;
}
/*
* This function returns 1 if pdev isn't a device instatiated by dt, 0 if it
* could successfully get all information from dt or a negative errno.
*/
static int serial_mxs_probe_dt(struct mxs_auart_port *s,
struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
int ret;
if (!np)
/* no device tree device */
return 1;
ret = of_alias_get_id(np, "serial");
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
return ret;
}
s->port.line = ret;
if (of_get_property(np, "uart-has-rtscts", NULL) ||
of_get_property(np, "fsl,uart-has-rtscts", NULL) /* deprecated */)
set_bit(MXS_AUART_RTSCTS, &s->flags);
return 0;
}
static int mxs_auart_init_gpios(struct mxs_auart_port *s, struct device *dev)
{
enum mctrl_gpio_idx i;
@ -1631,6 +1601,7 @@ static int mxs_auart_request_gpio_irq(struct mxs_auart_port *s)
static int mxs_auart_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct mxs_auart_port *s;
u32 version;
int ret, irq;
@ -1643,11 +1614,17 @@ static int mxs_auart_probe(struct platform_device *pdev)
s->port.dev = &pdev->dev;
s->dev = &pdev->dev;
ret = serial_mxs_probe_dt(s, pdev);
if (ret > 0)
s->port.line = pdev->id < 0 ? 0 : pdev->id;
else if (ret < 0)
ret = of_alias_get_id(np, "serial");
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
return ret;
}
s->port.line = ret;
if (of_get_property(np, "uart-has-rtscts", NULL) ||
of_get_property(np, "fsl,uart-has-rtscts", NULL) /* deprecated */)
set_bit(MXS_AUART_RTSCTS, &s->flags);
if (s->port.line >= ARRAY_SIZE(auart_port)) {
dev_err(&pdev->dev, "serial%d out of range\n", s->port.line);
return -EINVAL;

38
drivers/tty/serial/owl-uart.c
View File

@ -12,6 +12,7 @@
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@ -62,6 +63,9 @@
#define OWL_UART_STAT_TRFL_MASK GENMASK(16, 11)
#define OWL_UART_STAT_UTBB BIT(17)
#define OWL_UART_POLL_USEC 5
#define OWL_UART_TIMEOUT_USEC 10000
static struct uart_driver owl_uart_driver;
struct owl_uart_info {
@ -461,6 +465,36 @@ static void owl_uart_config_port(struct uart_port *port, int flags)
}
}
#ifdef CONFIG_CONSOLE_POLL
static int owl_uart_poll_get_char(struct uart_port *port)
{
if (owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_RFEM)
return NO_POLL_CHAR;
return owl_uart_read(port, OWL_UART_RXDAT);
}
static void owl_uart_poll_put_char(struct uart_port *port, unsigned char ch)
{
u32 reg;
int ret;
/* Wait while FIFO is full or timeout */
ret = readl_poll_timeout_atomic(port->membase + OWL_UART_STAT, reg,
!(reg & OWL_UART_STAT_TFFU),
OWL_UART_POLL_USEC,
OWL_UART_TIMEOUT_USEC);
if (ret == -ETIMEDOUT) {
dev_err(port->dev, "Timeout waiting while UART TX FULL\n");
return;
}
owl_uart_write(port, ch, OWL_UART_TXDAT);
}
#endif /* CONFIG_CONSOLE_POLL */
static const struct uart_ops owl_uart_ops = {
.set_mctrl = owl_uart_set_mctrl,
.get_mctrl = owl_uart_get_mctrl,
@ -476,6 +510,10 @@ static const struct uart_ops owl_uart_ops = {
.request_port = owl_uart_request_port,
.release_port = owl_uart_release_port,
.verify_port = owl_uart_verify_port,
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = owl_uart_poll_get_char,
.poll_put_char = owl_uart_poll_put_char,
#endif
};
#ifdef CONFIG_SERIAL_OWL_CONSOLE

11
drivers/tty/serial/serial_core.c
View File

@ -975,7 +975,6 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port,
port->closing_wait = closing_wait;
if (new_info->xmit_fifo_size)
uport->fifosize = new_info->xmit_fifo_size;
port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;
check_and_exit:
retval = 0;
@ -1795,8 +1794,6 @@ static int uart_port_activate(struct tty_port *port, struct tty_struct *tty)
if (!uport || uport->flags & UPF_DEAD)
return -ENXIO;
port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;
/*
* Start up the serial port.
*/
@ -2851,6 +2848,8 @@ static const struct attribute_group tty_dev_attr_group = {
* @drv: pointer to the uart low level driver structure for this port
* @uport: uart port structure to use for this port.
*
* Context: task context, might sleep
*
* This allows the driver to register its own uart_port structure
* with the core driver. The main purpose is to allow the low
* level uart drivers to expand uart_port, rather than having yet
@ -2864,8 +2863,6 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
struct device *tty_dev;
int num_groups;
BUG_ON(in_interrupt());
if (uport->line >= drv->nr)
return -EINVAL;
@ -2954,6 +2951,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
* @drv: pointer to the uart low level driver structure for this port
* @uport: uart port structure for this port
*
* Context: task context, might sleep
*
* This unhooks (and hangs up) the specified port structure from the
* core driver. No further calls will be made to the low-level code
* for this port.
@ -2966,8 +2965,6 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
struct tty_struct *tty;
int ret = 0;
BUG_ON(in_interrupt());
mutex_lock(&port_mutex);
/*

1503
drivers/tty/serial/sirfsoc_uart.c
View File

File diff suppressed because it is too large Load Diff

447
drivers/tty/serial/sirfsoc_uart.h
View File

@ -1,447 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Drivers for CSR SiRFprimaII onboard UARTs.
*
* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
*/
#include <linux/bitops.h>
#include <linux/log2.h>
#include <linux/hrtimer.h>
struct sirfsoc_uart_param {
const char *uart_name;
const char *port_name;
};
struct sirfsoc_register {
/* hardware uart specific */
u32 sirfsoc_line_ctrl;
u32 sirfsoc_divisor;
/* uart - usp common */
u32 sirfsoc_tx_rx_en;
u32 sirfsoc_int_en_reg;
u32 sirfsoc_int_st_reg;
u32 sirfsoc_int_en_clr_reg;
u32 sirfsoc_tx_dma_io_ctrl;
u32 sirfsoc_tx_dma_io_len;
u32 sirfsoc_tx_fifo_ctrl;
u32 sirfsoc_tx_fifo_level_chk;
u32 sirfsoc_tx_fifo_op;
u32 sirfsoc_tx_fifo_status;
u32 sirfsoc_tx_fifo_data;
u32 sirfsoc_rx_dma_io_ctrl;
u32 sirfsoc_rx_dma_io_len;
u32 sirfsoc_rx_fifo_ctrl;
u32 sirfsoc_rx_fifo_level_chk;
u32 sirfsoc_rx_fifo_op;
u32 sirfsoc_rx_fifo_status;
u32 sirfsoc_rx_fifo_data;
u32 sirfsoc_afc_ctrl;
u32 sirfsoc_swh_dma_io;
/* hardware usp specific */
u32 sirfsoc_mode1;
u32 sirfsoc_mode2;
u32 sirfsoc_tx_frame_ctrl;
u32 sirfsoc_rx_frame_ctrl;
u32 sirfsoc_async_param_reg;
};
typedef u32 (*fifo_full_mask)(struct uart_port *port);
typedef u32 (*fifo_empty_mask)(struct uart_port *port);
struct sirfsoc_fifo_status {
fifo_full_mask ff_full;
fifo_empty_mask ff_empty;
};
struct sirfsoc_int_en {
u32 sirfsoc_rx_done_en;
u32 sirfsoc_tx_done_en;
u32 sirfsoc_rx_oflow_en;
u32 sirfsoc_tx_allout_en;
u32 sirfsoc_rx_io_dma_en;
u32 sirfsoc_tx_io_dma_en;
u32 sirfsoc_rxfifo_full_en;
u32 sirfsoc_txfifo_empty_en;
u32 sirfsoc_rxfifo_thd_en;
u32 sirfsoc_txfifo_thd_en;
u32 sirfsoc_frm_err_en;
u32 sirfsoc_rxd_brk_en;
u32 sirfsoc_rx_timeout_en;
u32 sirfsoc_parity_err_en;
u32 sirfsoc_cts_en;
u32 sirfsoc_rts_en;
};
struct sirfsoc_int_status {
u32 sirfsoc_rx_done;
u32 sirfsoc_tx_done;
u32 sirfsoc_rx_oflow;
u32 sirfsoc_tx_allout;
u32 sirfsoc_rx_io_dma;
u32 sirfsoc_tx_io_dma;
u32 sirfsoc_rxfifo_full;
u32 sirfsoc_txfifo_empty;
u32 sirfsoc_rxfifo_thd;
u32 sirfsoc_txfifo_thd;
u32 sirfsoc_frm_err;
u32 sirfsoc_rxd_brk;
u32 sirfsoc_rx_timeout;
u32 sirfsoc_parity_err;
u32 sirfsoc_cts;
u32 sirfsoc_rts;
};
enum sirfsoc_uart_type {
SIRF_REAL_UART,
SIRF_USP_UART,
};
struct sirfsoc_uart_register {
struct sirfsoc_register uart_reg;
struct sirfsoc_int_en uart_int_en;
struct sirfsoc_int_status uart_int_st;
struct sirfsoc_fifo_status fifo_status;
struct sirfsoc_uart_param uart_param;
enum sirfsoc_uart_type uart_type;
};
static u32 uart_usp_ff_full_mask(struct uart_port *port)
{
u32 full_bit;
full_bit = ilog2(port->fifosize);
return (1 << full_bit);
}
static u32 uart_usp_ff_empty_mask(struct uart_port *port)
{
u32 empty_bit;
empty_bit = ilog2(port->fifosize) + 1;
return (1 << empty_bit);
}
static struct sirfsoc_uart_register sirfsoc_usp = {
.uart_reg = {
.sirfsoc_mode1 = 0x0000,
.sirfsoc_mode2 = 0x0004,
.sirfsoc_tx_frame_ctrl = 0x0008,
.sirfsoc_rx_frame_ctrl = 0x000c,
.sirfsoc_tx_rx_en = 0x0010,
.sirfsoc_int_en_reg = 0x0014,
.sirfsoc_int_st_reg = 0x0018,
.sirfsoc_async_param_reg = 0x0024,
.sirfsoc_tx_dma_io_ctrl = 0x0100,
.sirfsoc_tx_dma_io_len = 0x0104,
.sirfsoc_tx_fifo_ctrl = 0x0108,
.sirfsoc_tx_fifo_level_chk = 0x010c,
.sirfsoc_tx_fifo_op = 0x0110,
.sirfsoc_tx_fifo_status = 0x0114,
.sirfsoc_tx_fifo_data = 0x0118,
.sirfsoc_rx_dma_io_ctrl = 0x0120,
.sirfsoc_rx_dma_io_len = 0x0124,
.sirfsoc_rx_fifo_ctrl = 0x0128,
.sirfsoc_rx_fifo_level_chk = 0x012c,
.sirfsoc_rx_fifo_op = 0x0130,
.sirfsoc_rx_fifo_status = 0x0134,
.sirfsoc_rx_fifo_data = 0x0138,
.sirfsoc_int_en_clr_reg = 0x140,
},
.uart_int_en = {
.sirfsoc_rx_done_en = BIT(0),
.sirfsoc_tx_done_en = BIT(1),
.sirfsoc_rx_oflow_en = BIT(2),
.sirfsoc_tx_allout_en = BIT(3),
.sirfsoc_rx_io_dma_en = BIT(4),
.sirfsoc_tx_io_dma_en = BIT(5),
.sirfsoc_rxfifo_full_en = BIT(6),
.sirfsoc_txfifo_empty_en = BIT(7),
.sirfsoc_rxfifo_thd_en = BIT(8),
.sirfsoc_txfifo_thd_en = BIT(9),
.sirfsoc_frm_err_en = BIT(10),
.sirfsoc_rx_timeout_en = BIT(11),
.sirfsoc_rxd_brk_en = BIT(15),
},
.uart_int_st = {
.sirfsoc_rx_done = BIT(0),
.sirfsoc_tx_done = BIT(1),
.sirfsoc_rx_oflow = BIT(2),
.sirfsoc_tx_allout = BIT(3),
.sirfsoc_rx_io_dma = BIT(4),
.sirfsoc_tx_io_dma = BIT(5),
.sirfsoc_rxfifo_full = BIT(6),
.sirfsoc_txfifo_empty = BIT(7),
.sirfsoc_rxfifo_thd = BIT(8),
.sirfsoc_txfifo_thd = BIT(9),
.sirfsoc_frm_err = BIT(10),
.sirfsoc_rx_timeout = BIT(11),
.sirfsoc_rxd_brk = BIT(15),
},
.fifo_status = {
.ff_full = uart_usp_ff_full_mask,
.ff_empty = uart_usp_ff_empty_mask,
},
.uart_param = {
.uart_name = "ttySiRF",
.port_name = "sirfsoc-uart",
},
};
static struct sirfsoc_uart_register sirfsoc_uart = {
.uart_reg = {
.sirfsoc_line_ctrl = 0x0040,
.sirfsoc_tx_rx_en = 0x004c,
.sirfsoc_divisor = 0x0050,
.sirfsoc_int_en_reg = 0x0054,
.sirfsoc_int_st_reg = 0x0058,
.sirfsoc_int_en_clr_reg = 0x0060,
.sirfsoc_tx_dma_io_ctrl = 0x0100,
.sirfsoc_tx_dma_io_len = 0x0104,
.sirfsoc_tx_fifo_ctrl = 0x0108,
.sirfsoc_tx_fifo_level_chk = 0x010c,
.sirfsoc_tx_fifo_op = 0x0110,
.sirfsoc_tx_fifo_status = 0x0114,
.sirfsoc_tx_fifo_data = 0x0118,
.sirfsoc_rx_dma_io_ctrl = 0x0120,
.sirfsoc_rx_dma_io_len = 0x0124,
.sirfsoc_rx_fifo_ctrl = 0x0128,
.sirfsoc_rx_fifo_level_chk = 0x012c,
.sirfsoc_rx_fifo_op = 0x0130,
.sirfsoc_rx_fifo_status = 0x0134,
.sirfsoc_rx_fifo_data = 0x0138,
.sirfsoc_afc_ctrl = 0x0140,
.sirfsoc_swh_dma_io = 0x0148,
},
.uart_int_en = {
.sirfsoc_rx_done_en = BIT(0),
.sirfsoc_tx_done_en = BIT(1),
.sirfsoc_rx_oflow_en = BIT(2),
.sirfsoc_tx_allout_en = BIT(3),
.sirfsoc_rx_io_dma_en = BIT(4),
.sirfsoc_tx_io_dma_en = BIT(5),
.sirfsoc_rxfifo_full_en = BIT(6),
.sirfsoc_txfifo_empty_en = BIT(7),
.sirfsoc_rxfifo_thd_en = BIT(8),
.sirfsoc_txfifo_thd_en = BIT(9),
.sirfsoc_frm_err_en = BIT(10),
.sirfsoc_rxd_brk_en = BIT(11),
.sirfsoc_rx_timeout_en = BIT(12),
.sirfsoc_parity_err_en = BIT(13),
.sirfsoc_cts_en = BIT(14),
.sirfsoc_rts_en = BIT(15),
},
.uart_int_st = {
.sirfsoc_rx_done = BIT(0),
.sirfsoc_tx_done = BIT(1),
.sirfsoc_rx_oflow = BIT(2),
.sirfsoc_tx_allout = BIT(3),
.sirfsoc_rx_io_dma = BIT(4),
.sirfsoc_tx_io_dma = BIT(5),
.sirfsoc_rxfifo_full = BIT(6),
.sirfsoc_txfifo_empty = BIT(7),
.sirfsoc_rxfifo_thd = BIT(8),
.sirfsoc_txfifo_thd = BIT(9),
.sirfsoc_frm_err = BIT(10),
.sirfsoc_rxd_brk = BIT(11),
.sirfsoc_rx_timeout = BIT(12),
.sirfsoc_parity_err = BIT(13),
.sirfsoc_cts = BIT(14),
.sirfsoc_rts = BIT(15),
},
.fifo_status = {
.ff_full = uart_usp_ff_full_mask,
.ff_empty = uart_usp_ff_empty_mask,
},
.uart_param = {
.uart_name = "ttySiRF",
.port_name = "sirfsoc_uart",
},
};
/* uart io ctrl */
#define SIRFUART_DATA_BIT_LEN_MASK 0x3
#define SIRFUART_DATA_BIT_LEN_5 BIT(0)
#define SIRFUART_DATA_BIT_LEN_6 1
#define SIRFUART_DATA_BIT_LEN_7 2
#define SIRFUART_DATA_BIT_LEN_8 3
#define SIRFUART_STOP_BIT_LEN_1 0
#define SIRFUART_STOP_BIT_LEN_2 BIT(2)
#define SIRFUART_PARITY_EN BIT(3)
#define SIRFUART_EVEN_BIT BIT(4)
#define SIRFUART_STICK_BIT_MASK (7 << 3)
#define SIRFUART_STICK_BIT_NONE (0 << 3)
#define SIRFUART_STICK_BIT_EVEN BIT(3)
#define SIRFUART_STICK_BIT_ODD (3 << 3)
#define SIRFUART_STICK_BIT_MARK (5 << 3)
#define SIRFUART_STICK_BIT_SPACE (7 << 3)
#define SIRFUART_SET_BREAK BIT(6)
#define SIRFUART_LOOP_BACK BIT(7)
#define SIRFUART_PARITY_MASK (7 << 3)
#define SIRFUART_DUMMY_READ BIT(16)
#define SIRFUART_AFC_CTRL_RX_THD 0x70
#define SIRFUART_AFC_RX_EN BIT(8)
#define SIRFUART_AFC_TX_EN BIT(9)
#define SIRFUART_AFC_CTS_CTRL BIT(10)
#define SIRFUART_AFC_RTS_CTRL BIT(11)
#define SIRFUART_AFC_CTS_STATUS BIT(12)
#define SIRFUART_AFC_RTS_STATUS BIT(13)
/* UART FIFO Register */
#define SIRFUART_FIFO_STOP 0x0
#define SIRFUART_FIFO_RESET BIT(0)
#define SIRFUART_FIFO_START BIT(1)
#define SIRFUART_RX_EN BIT(0)
#define SIRFUART_TX_EN BIT(1)
#define SIRFUART_IO_MODE BIT(0)
#define SIRFUART_DMA_MODE 0x0
#define SIRFUART_RX_DMA_FLUSH 0x4
#define SIRFUART_CLEAR_RX_ADDR_EN 0x2
/* Baud Rate Calculation */
#define SIRF_USP_MIN_SAMPLE_DIV 0x1
#define SIRF_MIN_SAMPLE_DIV 0xf
#define SIRF_MAX_SAMPLE_DIV 0x3f
#define SIRF_IOCLK_DIV_MAX 0xffff
#define SIRF_SAMPLE_DIV_SHIFT 16
#define SIRF_IOCLK_DIV_MASK 0xffff
#define SIRF_SAMPLE_DIV_MASK 0x3f0000
#define SIRF_BAUD_RATE_SUPPORT_NR 18
/* USP SPEC */
#define SIRFSOC_USP_ENDIAN_CTRL_LSBF BIT(4)
#define SIRFSOC_USP_EN BIT(5)
#define SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET 0
#define SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET 8
#define SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK 0x3ff
#define SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET 21
#define SIRFSOC_USP_TX_DATA_LEN_OFFSET 0
#define SIRFSOC_USP_TX_SYNC_LEN_OFFSET 8
#define SIRFSOC_USP_TX_FRAME_LEN_OFFSET 16
#define SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET 24
#define SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET 30
#define SIRFSOC_USP_RX_DATA_LEN_OFFSET 0
#define SIRFSOC_USP_RX_FRAME_LEN_OFFSET 8
#define SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET 16
#define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET 24
#define SIRFSOC_USP_ASYNC_DIV2_MASK 0x3f
#define SIRFSOC_USP_ASYNC_DIV2_OFFSET 16
#define SIRFSOC_USP_LOOP_BACK_CTRL BIT(2)
#define SIRFSOC_USP_FRADDR_CLR_EN BIT(1)
/* USP-UART Common */
#define SIRFSOC_UART_RX_TIMEOUT(br, to) (((br) * (((to) + 999) / 1000)) / 1000)
#define SIRFUART_RECV_TIMEOUT_VALUE(x) \
(((x) > 0xFFFF) ? 0xFFFF : ((x) & 0xFFFF))
#define SIRFUART_USP_RECV_TIMEOUT(x) (x & 0xFFFF)
#define SIRFUART_UART_RECV_TIMEOUT(x) ((x & 0xFFFF) << 16)
#define SIRFUART_FIFO_THD(port) (port->fifosize >> 1)
#define SIRFUART_ERR_INT_STAT(unit_st, uart_type) \
(uint_st->sirfsoc_rx_oflow | \
uint_st->sirfsoc_frm_err | \
uint_st->sirfsoc_rxd_brk | \
((uart_type != SIRF_REAL_UART) ? \
0 : uint_st->sirfsoc_parity_err))
#define SIRFUART_RX_IO_INT_EN(uint_en, uart_type) \
(uint_en->sirfsoc_rx_done_en |\
uint_en->sirfsoc_rxfifo_thd_en |\
uint_en->sirfsoc_rxfifo_full_en |\
uint_en->sirfsoc_frm_err_en |\
uint_en->sirfsoc_rx_oflow_en |\
uint_en->sirfsoc_rxd_brk_en |\
((uart_type != SIRF_REAL_UART) ? \
0 : uint_en->sirfsoc_parity_err_en))
#define SIRFUART_RX_IO_INT_ST(uint_st) \
(uint_st->sirfsoc_rxfifo_thd |\
uint_st->sirfsoc_rxfifo_full|\
uint_st->sirfsoc_rx_done |\
uint_st->sirfsoc_rx_timeout)
#define SIRFUART_CTS_INT_ST(uint_st) (uint_st->sirfsoc_cts)
#define SIRFUART_RX_DMA_INT_EN(uint_en, uart_type) \
(uint_en->sirfsoc_frm_err_en |\
uint_en->sirfsoc_rx_oflow_en |\
uint_en->sirfsoc_rxd_brk_en |\
((uart_type != SIRF_REAL_UART) ? \
0 : uint_en->sirfsoc_parity_err_en))
/* Generic Definitions */
#define SIRFSOC_UART_NAME "ttySiRF"
#define SIRFSOC_UART_MAJOR 0
#define SIRFSOC_UART_MINOR 0
#define SIRFUART_PORT_NAME "sirfsoc-uart"
#define SIRFUART_MAP_SIZE 0x200
#define SIRFSOC_UART_NR 11
#define SIRFSOC_PORT_TYPE 0xa5
/* Uart Common Use Macro*/
#define SIRFSOC_RX_DMA_BUF_SIZE (1024 * 32)
#define BYTES_TO_ALIGN(dma_addr) ((unsigned long)(dma_addr) & 0x3)
/* Uart Fifo Level Chk */
#define SIRFUART_TX_FIFO_SC_OFFSET 0
#define SIRFUART_TX_FIFO_LC_OFFSET 10
#define SIRFUART_TX_FIFO_HC_OFFSET 20
#define SIRFUART_TX_FIFO_CHK_SC(line, value) ((((line) == 1) ? (value & 0x3) :\
(value & 0x1f)) << SIRFUART_TX_FIFO_SC_OFFSET)
#define SIRFUART_TX_FIFO_CHK_LC(line, value) ((((line) == 1) ? (value & 0x3) :\
(value & 0x1f)) << SIRFUART_TX_FIFO_LC_OFFSET)
#define SIRFUART_TX_FIFO_CHK_HC(line, value) ((((line) == 1) ? (value & 0x3) :\
(value & 0x1f)) << SIRFUART_TX_FIFO_HC_OFFSET)
#define SIRFUART_RX_FIFO_CHK_SC SIRFUART_TX_FIFO_CHK_SC
#define SIRFUART_RX_FIFO_CHK_LC SIRFUART_TX_FIFO_CHK_LC
#define SIRFUART_RX_FIFO_CHK_HC SIRFUART_TX_FIFO_CHK_HC
#define SIRFUART_RX_FIFO_MASK 0x7f
/* Indicate how many buffers used */
/* For Fast Baud Rate Calculation */
struct sirfsoc_baudrate_to_regv {
unsigned int baud_rate;
unsigned int reg_val;
};
enum sirfsoc_tx_state {
TX_DMA_IDLE,
TX_DMA_RUNNING,
TX_DMA_PAUSE,
};
struct sirfsoc_rx_buffer {
struct circ_buf xmit;
dma_cookie_t cookie;
struct dma_async_tx_descriptor *desc;
dma_addr_t dma_addr;
};
struct sirfsoc_uart_port {
bool hw_flow_ctrl;
bool ms_enabled;
struct uart_port port;
struct clk *clk;
/* for SiRFatlas7, there are SET/CLR for UART_INT_EN */
bool is_atlas7;
struct sirfsoc_uart_register *uart_reg;
struct dma_chan *rx_dma_chan;
struct dma_chan *tx_dma_chan;
dma_addr_t tx_dma_addr;
struct dma_async_tx_descriptor *tx_dma_desc;
unsigned long transfer_size;
enum sirfsoc_tx_state tx_dma_state;
unsigned int cts_gpio;
unsigned int rts_gpio;
struct sirfsoc_rx_buffer rx_dma_items;
struct hrtimer hrt;
bool is_hrt_enabled;
unsigned long rx_period_time;
unsigned long rx_last_pos;
unsigned long pio_fetch_cnt;
};
/* Register Access Control */
#define portaddr(port, reg) ((port)->membase + (reg))
#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg)))
#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg))
/* UART Port Mask */
#define SIRFUART_FIFOLEVEL_MASK(port) ((port->fifosize - 1) & 0xFFF)
#define SIRFUART_FIFOFULL_MASK(port) (port->fifosize & 0xFFF)
#define SIRFUART_FIFOEMPTY_MASK(port) ((port->fifosize & 0xFFF) << 1)

419
drivers/tty/serial/stm32-usart.c
View File

File diff suppressed because it is too large Load Diff

1
drivers/tty/synclink_gt.c
View File

@ -672,7 +672,6 @@ static int open(struct tty_struct *tty, struct file *filp)
DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count));
mutex_lock(&info->port.mutex);
info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
spin_lock_irqsave(&info->netlock, flags);
if (info->netcount) {

210
drivers/tty/tty_io.c
View File

@ -142,7 +142,7 @@ LIST_HEAD(tty_drivers); /* linked list of tty drivers */
/* Mutex to protect creating and releasing a tty */
DEFINE_MUTEX(tty_mutex);
static ssize_t tty_read(struct file *, char __user *, size_t, loff_t *);
static ssize_t tty_read(struct kiocb *, struct iov_iter *);
static ssize_t tty_write(struct kiocb *, struct iov_iter *);
static __poll_t tty_poll(struct file *, poll_table *);
static int tty_open(struct inode *, struct file *);
@ -429,8 +429,7 @@ struct tty_driver *tty_find_polling_driver(char *name, int *line)
EXPORT_SYMBOL_GPL(tty_find_polling_driver);
#endif
static ssize_t hung_up_tty_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
static ssize_t hung_up_tty_read(struct kiocb *iocb, struct iov_iter *to)
{
return 0;
}
@ -473,8 +472,9 @@ static void tty_show_fdinfo(struct seq_file *m, struct file *file)
static const struct file_operations tty_fops = {
.llseek = no_llseek,
.read = tty_read,
.read_iter = tty_read,
.write_iter = tty_write,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.poll = tty_poll,
.unlocked_ioctl = tty_ioctl,
@ -487,8 +487,9 @@ static const struct file_operations tty_fops = {
static const struct file_operations console_fops = {
.llseek = no_llseek,
.read = tty_read,
.read_iter = tty_read,
.write_iter = redirected_tty_write,
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.poll = tty_poll,
.unlocked_ioctl = tty_ioctl,
@ -500,7 +501,7 @@ static const struct file_operations console_fops = {
static const struct file_operations hung_up_tty_fops = {
.llseek = no_llseek,
.read = hung_up_tty_read,
.read_iter = hung_up_tty_read,
.write_iter = hung_up_tty_write,
.poll = hung_up_tty_poll,
.unlocked_ioctl = hung_up_tty_ioctl,
@ -538,6 +539,29 @@ void tty_wakeup(struct tty_struct *tty)
EXPORT_SYMBOL_GPL(tty_wakeup);
/**
* tty_release_redirect - Release a redirect on a pty if present
* @tty: tty device
*
* This is available to the pty code so if the master closes, if the
* slave is a redirect it can release the redirect. It returns the
* filp for the redirect, which must be fput when the operations on
* the tty are completed.
*/
struct file *tty_release_redirect(struct tty_struct *tty)
{
struct file *f = NULL;
spin_lock(&redirect_lock);
if (redirect && file_tty(redirect) == tty) {
f = redirect;
redirect = NULL;
}
spin_unlock(&redirect_lock);
return f;
}
/**
* __tty_hangup - actual handler for hangup events
* @tty: tty device
@ -564,7 +588,7 @@ EXPORT_SYMBOL_GPL(tty_wakeup);
static void __tty_hangup(struct tty_struct *tty, int exit_session)
{
struct file *cons_filp = NULL;
struct file *filp, *f = NULL;
struct file *filp, *f;
struct tty_file_private *priv;
int closecount = 0, n;
int refs;
@ -572,13 +596,7 @@ static void __tty_hangup(struct tty_struct *tty, int exit_session)
if (!tty)
return;
spin_lock(&redirect_lock);
if (redirect && file_tty(redirect) == tty) {
f = redirect;
redirect = NULL;
}
spin_unlock(&redirect_lock);
f = tty_release_redirect(tty);
tty_lock(tty);
@ -829,6 +847,72 @@ static void tty_update_time(struct timespec64 *time)
time->tv_sec = sec;
}
/*
* Iterate on the ldisc ->read() function until we've gotten all
* the data the ldisc has for us.
*
* The "cookie" is something that the ldisc read function can fill
* in to let us know that there is more data to be had.
*
* We promise to continue to call the ldisc until it stops returning
* data or clears the cookie. The cookie may be something that the
* ldisc maintains state for and needs to free.
*/
static int iterate_tty_read(struct tty_ldisc *ld, struct tty_struct *tty,
struct file *file, struct iov_iter *to)
{
int retval = 0;
void *cookie = NULL;
unsigned long offset = 0;
char kernel_buf[64];
size_t count = iov_iter_count(to);
do {
int size, copied;
size = count > sizeof(kernel_buf) ? sizeof(kernel_buf) : count;
size = ld->ops->read(tty, file, kernel_buf, size, &cookie, offset);
if (!size)
break;
if (size < 0) {
/* Did we have an earlier error (ie -EFAULT)? */
if (retval)
break;
retval = size;
/*
* -EOVERFLOW means we didn't have enough space
* for a whole packet, and we shouldn't return
* a partial result.
*/
if (retval == -EOVERFLOW)
offset = 0;
break;
}
copied = copy_to_iter(kernel_buf, size, to);
offset += copied;
count -= copied;
/*
* If the user copy failed, we still need to do another ->read()
* call if we had a cookie to let the ldisc clear up.
*
* But make sure size is zeroed.
*/
if (unlikely(copied != size)) {
count = 0;
retval = -EFAULT;
}
} while (cookie);
/* We always clear tty buffer in case they contained passwords */
memzero_explicit(kernel_buf, sizeof(kernel_buf));
return offset ? offset : retval;
}
/**
* tty_read - read method for tty device files
* @file: pointer to tty file
@ -844,10 +928,10 @@ static void tty_update_time(struct timespec64 *time)
* read calls may be outstanding in parallel.
*/
static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
static ssize_t tty_read(struct kiocb *iocb, struct iov_iter *to)
{
int i;
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
struct tty_struct *tty = file_tty(file);
struct tty_ldisc *ld;
@ -861,11 +945,10 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
situation */
ld = tty_ldisc_ref_wait(tty);
if (!ld)
return hung_up_tty_read(file, buf, count, ppos);
return hung_up_tty_read(iocb, to);
i = -EIO;
if (ld->ops->read)
i = ld->ops->read(tty, file, buf, count);
else
i = -EIO;
i = iterate_tty_read(ld, tty, file, to);
tty_ldisc_deref(ld);
if (i > 0)
@ -1889,22 +1972,7 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp,
return driver;
}
/**
* tty_kopen - open a tty device for kernel
* @device: dev_t of device to open
*
* Opens tty exclusively for kernel. Performs the driver lookup,
* makes sure it's not already opened and performs the first-time
* tty initialization.
*
* Returns the locked initialized &tty_struct
*
* Claims the global tty_mutex to serialize:
* - concurrent first-time tty initialization
* - concurrent tty driver removal w/ lookup
* - concurrent tty removal from driver table
*/
struct tty_struct *tty_kopen(dev_t device)
static struct tty_struct *tty_kopen(dev_t device, int shared)
{
struct tty_struct *tty;
struct tty_driver *driver;
@ -1919,7 +1987,7 @@ struct tty_struct *tty_kopen(dev_t device)
/* check whether we're reopening an existing tty */
tty = tty_driver_lookup_tty(driver, NULL, index);
if (IS_ERR(tty))
if (IS_ERR(tty) || shared)
goto out;
if (tty) {
@ -1937,7 +2005,42 @@ out:
tty_driver_kref_put(driver);
return tty;
}
EXPORT_SYMBOL_GPL(tty_kopen);
/**
* tty_kopen_exclusive - open a tty device for kernel
* @device: dev_t of device to open
*
* Opens tty exclusively for kernel. Performs the driver lookup,
* makes sure it's not already opened and performs the first-time
* tty initialization.
*
* Returns the locked initialized &tty_struct
*
* Claims the global tty_mutex to serialize:
* - concurrent first-time tty initialization
* - concurrent tty driver removal w/ lookup
* - concurrent tty removal from driver table
*/
struct tty_struct *tty_kopen_exclusive(dev_t device)
{
return tty_kopen(device, 0);
}
EXPORT_SYMBOL_GPL(tty_kopen_exclusive);
/**
* tty_kopen_shared - open a tty device for shared in-kernel use
* @device: dev_t of device to open
*
* Opens an already existing tty for in-kernel use. Compared to
* tty_kopen_exclusive() above it doesn't ensure to be the only user.
*
* Locking is identical to tty_kopen() above.
*/
struct tty_struct *tty_kopen_shared(dev_t device)
{
return tty_kopen(device, 1);
}
EXPORT_SYMBOL_GPL(tty_kopen_shared);
/**
* tty_open_by_driver - open a tty device
@ -2488,15 +2591,36 @@ static int tty_tiocmset(struct tty_struct *tty, unsigned int cmd,
return tty->ops->tiocmset(tty, set, clear);
}
/**
* tty_get_icount - get tty statistics
* @tty: tty device
* @icount: output parameter
*
* Gets a copy of the tty's icount statistics.
*
* Locking: none (up to the driver)
*/
int tty_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount)
{
memset(icount, 0, sizeof(*icount));
if (tty->ops->get_icount)
return tty->ops->get_icount(tty, icount);
else
return -EINVAL;
}
EXPORT_SYMBOL_GPL(tty_get_icount);
static int tty_tiocgicount(struct tty_struct *tty, void __user *arg)
{
int retval = -EINVAL;
struct serial_icounter_struct icount;
memset(&icount, 0, sizeof(icount));
if (tty->ops->get_icount)
retval = tty->ops->get_icount(tty, &icount);
int retval;
retval = tty_get_icount(tty, &icount);
if (retval != 0)
return retval;
if (copy_to_user(arg, &icount, sizeof(icount)))
return -EFAULT;
return 0;
@ -2887,7 +3011,7 @@ static long tty_compat_ioctl(struct file *file, unsigned int cmd,
static int this_tty(const void *t, struct file *file, unsigned fd)
{
if (likely(file->f_op->read != tty_read))
if (likely(file->f_op->read_iter != tty_read))
return 0;
return file_tty(file) != t ? 0 : fd + 1;
}

10
drivers/tty/vcc.c
View File

@ -681,9 +681,6 @@ static int vcc_remove(struct vio_dev *vdev)
{
struct vcc_port *port = dev_get_drvdata(&vdev->dev);
if (!port)
return -ENODEV;
del_timer_sync(&port->rx_timer);
del_timer_sync(&port->tx_timer);
@ -695,12 +692,9 @@ static int vcc_remove(struct vio_dev *vdev)
tty_vhangup(port->tty);
/* Get exclusive reference to VCC, ensures that there are no other
* clients to this port
* clients to this port. This cannot fail.
*/
port = vcc_get(port->index, true);
if (WARN_ON(!port))
return -ENODEV;
vcc_get(port->index, true);
tty_unregister_device(vcc_tty_driver, port->index);

2
drivers/tty/vt/consolemap.c
View File

@ -495,7 +495,7 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
p2[unicode & 0x3f] = fontpos;
p->sum += (fontpos << 20) + unicode;
p->sum += (fontpos << 20U) + unicode;
return 0;
}

82
drivers/tty/vt/defkeymap.c_shipped
View File

@ -6,7 +6,7 @@
#include <linux/keyboard.h>
#include <linux/kd.h>
u_short plain_map[NR_KEYS] = {
unsigned short plain_map[NR_KEYS] = {
0xf200, 0xf01b, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036,
0xf037, 0xf038, 0xf039, 0xf030, 0xf02d, 0xf03d, 0xf07f, 0xf009,
0xfb71, 0xfb77, 0xfb65, 0xfb72, 0xfb74, 0xfb79, 0xfb75, 0xfb69,
@ -25,7 +25,7 @@ u_short plain_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
u_short shift_map[NR_KEYS] = {
static unsigned short shift_map[NR_KEYS] = {
0xf200, 0xf01b, 0xf021, 0xf040, 0xf023, 0xf024, 0xf025, 0xf05e,
0xf026, 0xf02a, 0xf028, 0xf029, 0xf05f, 0xf02b, 0xf07f, 0xf009,
0xfb51, 0xfb57, 0xfb45, 0xfb52, 0xfb54, 0xfb59, 0xfb55, 0xfb49,
@ -44,7 +44,7 @@ u_short shift_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
u_short altgr_map[NR_KEYS] = {
static unsigned short altgr_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf040, 0xf200, 0xf024, 0xf200, 0xf200,
0xf07b, 0xf05b, 0xf05d, 0xf07d, 0xf05c, 0xf200, 0xf200, 0xf200,
0xfb71, 0xfb77, 0xf918, 0xfb72, 0xfb74, 0xfb79, 0xfb75, 0xfb69,
@ -63,7 +63,7 @@ u_short altgr_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
u_short ctrl_map[NR_KEYS] = {
static unsigned short ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf000, 0xf01b, 0xf01c, 0xf01d, 0xf01e,
0xf01f, 0xf07f, 0xf200, 0xf200, 0xf01f, 0xf200, 0xf008, 0xf200,
0xf011, 0xf017, 0xf005, 0xf012, 0xf014, 0xf019, 0xf015, 0xf009,
@ -82,7 +82,7 @@ u_short ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
u_short shift_ctrl_map[NR_KEYS] = {
static unsigned short shift_ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf000, 0xf200, 0xf200, 0xf200, 0xf200,
0xf200, 0xf200, 0xf200, 0xf200, 0xf01f, 0xf200, 0xf200, 0xf200,
0xf011, 0xf017, 0xf005, 0xf012, 0xf014, 0xf019, 0xf015, 0xf009,
@ -101,7 +101,7 @@ u_short shift_ctrl_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
u_short alt_map[NR_KEYS] = {
static unsigned short alt_map[NR_KEYS] = {
0xf200, 0xf81b, 0xf831, 0xf832, 0xf833, 0xf834, 0xf835, 0xf836,
0xf837, 0xf838, 0xf839, 0xf830, 0xf82d, 0xf83d, 0xf87f, 0xf809,
0xf871, 0xf877, 0xf865, 0xf872, 0xf874, 0xf879, 0xf875, 0xf869,
@ -120,7 +120,7 @@ u_short alt_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
};
u_short ctrl_alt_map[NR_KEYS] = {
static unsigned short ctrl_alt_map[NR_KEYS] = {
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
0xf811, 0xf817, 0xf805, 0xf812, 0xf814, 0xf819, 0xf815, 0xf809,
@ -224,40 +224,40 @@ char *func_table[MAX_NR_FUNC] = {
};
struct kbdiacruc accent_table[MAX_DIACR] = {
{'`', 'A', 0300}, {'`', 'a', 0340},
{'\'', 'A', 0301}, {'\'', 'a', 0341},
{'^', 'A', 0302}, {'^', 'a', 0342},
{'~', 'A', 0303}, {'~', 'a', 0343},
{'"', 'A', 0304}, {'"', 'a', 0344},
{'O', 'A', 0305}, {'o', 'a', 0345},
{'0', 'A', 0305}, {'0', 'a', 0345},
{'A', 'A', 0305}, {'a', 'a', 0345},
{'A', 'E', 0306}, {'a', 'e', 0346},
{',', 'C', 0307}, {',', 'c', 0347},
{'`', 'E', 0310}, {'`', 'e', 0350},
{'\'', 'E', 0311}, {'\'', 'e', 0351},
{'^', 'E', 0312}, {'^', 'e', 0352},
{'"', 'E', 0313}, {'"', 'e', 0353},
{'`', 'I', 0314}, {'`', 'i', 0354},
{'\'', 'I', 0315}, {'\'', 'i', 0355},
{'^', 'I', 0316}, {'^', 'i', 0356},
{'"', 'I', 0317}, {'"', 'i', 0357},
{'-', 'D', 0320}, {'-', 'd', 0360},
{'~', 'N', 0321}, {'~', 'n', 0361},
{'`', 'O', 0322}, {'`', 'o', 0362},
{'\'', 'O', 0323}, {'\'', 'o', 0363},
{'^', 'O', 0324}, {'^', 'o', 0364},
{'~', 'O', 0325}, {'~', 'o', 0365},
{'"', 'O', 0326}, {'"', 'o', 0366},
{'/', 'O', 0330}, {'/', 'o', 0370},
{'`', 'U', 0331}, {'`', 'u', 0371},
{'\'', 'U', 0332}, {'\'', 'u', 0372},
{'^', 'U', 0333}, {'^', 'u', 0373},
{'"', 'U', 0334}, {'"', 'u', 0374},
{'\'', 'Y', 0335}, {'\'', 'y', 0375},
{'T', 'H', 0336}, {'t', 'h', 0376},
{'s', 's', 0337}, {'"', 'y', 0377},
{'s', 'z', 0337}, {'i', 'j', 0377},
{'`', 'A', 0x00c0}, {'`', 'a', 0x00e0},
{'\'', 'A', 0x00c1}, {'\'', 'a', 0x00e1},
{'^', 'A', 0x00c2}, {'^', 'a', 0x00e2},
{'~', 'A', 0x00c3}, {'~', 'a', 0x00e3},
{'"', 'A', 0x00c4}, {'"', 'a', 0x00e4},
{'O', 'A', 0x00c5}, {'o', 'a', 0x00e5},
{'0', 'A', 0x00c5}, {'0', 'a', 0x00e5},
{'A', 'A', 0x00c5}, {'a', 'a', 0x00e5},
{'A', 'E', 0x00c6}, {'a', 'e', 0x00e6},
{',', 'C', 0x00c7}, {',', 'c', 0x00e7},
{'`', 'E', 0x00c8}, {'`', 'e', 0x00e8},
{'\'', 'E', 0x00c9}, {'\'', 'e', 0x00e9},
{'^', 'E', 0x00ca}, {'^', 'e', 0x00ea},
{'"', 'E', 0x00cb}, {'"', 'e', 0x00eb},
{'`', 'I', 0x00cc}, {'`', 'i', 0x00ec},
{'\'', 'I', 0x00cd}, {'\'', 'i', 0x00ed},
{'^', 'I', 0x00ce}, {'^', 'i', 0x00ee},
{'"', 'I', 0x00cf}, {'"', 'i', 0x00ef},
{'-', 'D', 0x00d0}, {'-', 'd', 0x00f0},
{'~', 'N', 0x00d1}, {'~', 'n', 0x00f1},
{'`', 'O', 0x00d2}, {'`', 'o', 0x00f2},
{'\'', 'O', 0x00d3}, {'\'', 'o', 0x00f3},
{'^', 'O', 0x00d4}, {'^', 'o', 0x00f4},
{'~', 'O', 0x00d5}, {'~', 'o', 0x00f5},
{'"', 'O', 0x00d6}, {'"', 'o', 0x00f6},
{'/', 'O', 0x00d8}, {'/', 'o', 0x00f8},
{'`', 'U', 0x00d9}, {'`', 'u', 0x00f9},
{'\'', 'U', 0x00da}, {'\'', 'u', 0x00fa},
{'^', 'U', 0x00db}, {'^', 'u', 0x00fb},
{'"', 'U', 0x00dc}, {'"', 'u', 0x00fc},
{'\'', 'Y', 0x00dd}, {'\'', 'y', 0x00fd},
{'T', 'H', 0x00de}, {'t', 'h', 0x00fe},
{'s', 's', 0x00df}, {'"', 'y', 0x00ff},
{'s', 'z', 0x00df}, {'i', 'j', 0x00ff},
};
unsigned int accent_table_size = 68;

18
drivers/tty/vt/keyboard.c
View File

@ -131,6 +131,9 @@ static const unsigned char max_vals[] = {
static const int NR_TYPES = ARRAY_SIZE(max_vals);
static void kbd_bh(struct tasklet_struct *unused);
static DECLARE_TASKLET_DISABLED(keyboard_tasklet, kbd_bh);
static struct input_handler kbd_handler;
static DEFINE_SPINLOCK(kbd_event_lock);
static DEFINE_SPINLOCK(led_lock);
@ -372,6 +375,12 @@ static void to_utf8(struct vc_data *vc, uint c)
}
}
/* FIXME: review locking for vt.c callers */
static void set_leds(void)
{
tasklet_schedule(&keyboard_tasklet);
}
/*
* Called after returning from RAW mode or when changing consoles - recompute
* shift_down[] and shift_state from key_down[] maybe called when keymap is
@ -401,9 +410,12 @@ static void do_compute_shiftstate(void)
}
/* We still have to export this method to vt.c */
void compute_shiftstate(void)
void vt_set_leds_compute_shiftstate(void)
{
unsigned long flags;
set_leds();
spin_lock_irqsave(&kbd_event_lock, flags);
do_compute_shiftstate();
spin_unlock_irqrestore(&kbd_event_lock, flags);
@ -1233,7 +1245,7 @@ void vt_kbd_con_stop(int console)
* handle the scenario when keyboard handler is not registered yet
* but we already getting updates from the VT to update led state.
*/
static void kbd_bh(unsigned long dummy)
static void kbd_bh(struct tasklet_struct *unused)
{
unsigned int leds;
unsigned long flags;
@ -1249,8 +1261,6 @@ static void kbd_bh(unsigned long dummy)
}
}
DECLARE_TASKLET_DISABLED_OLD(keyboard_tasklet, kbd_bh);
#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\

42
drivers/tty/vt/vt.c
View File

@ -1036,8 +1036,7 @@ void redraw_screen(struct vc_data *vc, int is_switch)
}
set_cursor(vc);
if (is_switch) {
set_leds();
compute_shiftstate();
vt_set_leds_compute_shiftstate();
notify_update(vc);
}
}
@ -4584,16 +4583,8 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op)
if (op->data && font.charcount > op->charcount)
rc = -ENOSPC;
if (!(op->flags & KD_FONT_FLAG_OLD)) {
if (font.width > op->width || font.height > op->height)
rc = -ENOSPC;
} else {
if (font.width != 8)
rc = -EIO;
else if ((op->height && font.height > op->height) ||
font.height > 32)
rc = -ENOSPC;
}
if (font.width > op->width || font.height > op->height)
rc = -ENOSPC;
if (rc)
goto out;
@ -4621,7 +4612,7 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
return -EINVAL;
if (op->charcount > 512)
return -EINVAL;
if (op->width <= 0 || op->width > 32 || op->height > 32)
if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
return -EINVAL;
size = (op->width+7)/8 * 32 * op->charcount;
if (size > max_font_size)
@ -4631,31 +4622,6 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op)
if (IS_ERR(font.data))
return PTR_ERR(font.data);
if (!op->height) { /* Need to guess font height [compat] */
int h, i;
u8 *charmap = font.data;
/*
* If from KDFONTOP ioctl, don't allow things which can be done
* in userland,so that we can get rid of this soon
*/
if (!(op->flags & KD_FONT_FLAG_OLD)) {
kfree(font.data);
return -EINVAL;
}
for (h = 32; h > 0; h--)
for (i = 0; i < op->charcount; i++)
if (charmap[32*i+h-1])
goto nonzero;
kfree(font.data);
return -EINVAL;
nonzero:
op->height = h;
}
font.charcount = op->charcount;
font.width = op->width;
font.height = op->height;

154
drivers/tty/vt/vt_ioctl.c
View File

@ -484,70 +484,6 @@ static int vt_k_ioctl(struct tty_struct *tty, unsigned int cmd,
return 0;
}
static inline int do_fontx_ioctl(struct vc_data *vc, int cmd,
struct consolefontdesc __user *user_cfd,
struct console_font_op *op)
{
struct consolefontdesc cfdarg;
int i;
if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc)))
return -EFAULT;
switch (cmd) {
case PIO_FONTX:
op->op = KD_FONT_OP_SET;
op->flags = KD_FONT_FLAG_OLD;
op->width = 8;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = cfdarg.chardata;
return con_font_op(vc, op);
case GIO_FONTX:
op->op = KD_FONT_OP_GET;
op->flags = KD_FONT_FLAG_OLD;
op->width = 8;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = cfdarg.chardata;
i = con_font_op(vc, op);
if (i)
return i;
cfdarg.charheight = op->height;
cfdarg.charcount = op->charcount;
if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc)))
return -EFAULT;
return 0;
}
return -EINVAL;
}
static int vt_io_fontreset(struct vc_data *vc, struct console_font_op *op)
{
int ret;
if (__is_defined(BROKEN_GRAPHICS_PROGRAMS)) {
/*
* With BROKEN_GRAPHICS_PROGRAMS defined, the default font is
* not saved.
*/
return -ENOSYS;
}
op->op = KD_FONT_OP_SET_DEFAULT;
op->data = NULL;
ret = con_font_op(vc, op);
if (ret)
return ret;
console_lock();
con_set_default_unimap(vc);
console_unlock();
return 0;
}
static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud,
bool perm, struct vc_data *vc)
{
@ -572,29 +508,7 @@ static inline int do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud,
static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
bool perm)
{
struct console_font_op op; /* used in multiple places here */
switch (cmd) {
case PIO_FONT:
if (!perm)
return -EPERM;
op.op = KD_FONT_OP_SET;
op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */
op.width = 8;
op.height = 0;
op.charcount = 256;
op.data = up;
return con_font_op(vc, &op);
case GIO_FONT:
op.op = KD_FONT_OP_GET;
op.flags = KD_FONT_FLAG_OLD;
op.width = 8;
op.height = 32;
op.charcount = 256;
op.data = up;
return con_font_op(vc, &op);
case PIO_CMAP:
if (!perm)
return -EPERM;
@ -603,20 +517,6 @@ static int vt_io_ioctl(struct vc_data *vc, unsigned int cmd, void __user *up,
case GIO_CMAP:
return con_get_cmap(up);
case PIO_FONTX:
if (!perm)
return -EPERM;
fallthrough;
case GIO_FONTX:
return do_fontx_ioctl(vc, cmd, up, &op);
case PIO_FONTRESET:
if (!perm)
return -EPERM;
return vt_io_fontreset(vc, &op);
case PIO_SCRNMAP:
if (!perm)
return -EPERM;
@ -1030,8 +930,7 @@ void reset_vc(struct vc_data *vc)
put_pid(vc->vt_pid);
vc->vt_pid = NULL;
vc->vt_newvt = -1;
if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */
reset_palette(vc);
reset_palette(vc);
}
void vc_SAK(struct work_struct *work)
@ -1059,54 +958,6 @@ void vc_SAK(struct work_struct *work)
#ifdef CONFIG_COMPAT
struct compat_consolefontdesc {
unsigned short charcount; /* characters in font (256 or 512) */
unsigned short charheight; /* scan lines per character (1-32) */
compat_caddr_t chardata; /* font data in expanded form */
};
static inline int
compat_fontx_ioctl(struct vc_data *vc, int cmd,
struct compat_consolefontdesc __user *user_cfd,
int perm, struct console_font_op *op)
{
struct compat_consolefontdesc cfdarg;
int i;
if (copy_from_user(&cfdarg, user_cfd, sizeof(struct compat_consolefontdesc)))
return -EFAULT;
switch (cmd) {
case PIO_FONTX:
if (!perm)
return -EPERM;
op->op = KD_FONT_OP_SET;
op->flags = KD_FONT_FLAG_OLD;
op->width = 8;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = compat_ptr(cfdarg.chardata);
return con_font_op(vc, op);
case GIO_FONTX:
op->op = KD_FONT_OP_GET;
op->flags = KD_FONT_FLAG_OLD;
op->width = 8;
op->height = cfdarg.charheight;
op->charcount = cfdarg.charcount;
op->data = compat_ptr(cfdarg.chardata);
i = con_font_op(vc, op);
if (i)
return i;
cfdarg.charheight = op->height;
cfdarg.charcount = op->charcount;
if (copy_to_user(user_cfd, &cfdarg, sizeof(struct compat_consolefontdesc)))
return -EFAULT;
return 0;
}
return -EINVAL;
}
struct compat_console_font_op {
compat_uint_t op; /* operation code KD_FONT_OP_* */
compat_uint_t flags; /* KD_FONT_FLAG_* */
@ -1183,9 +1034,6 @@ long vt_compat_ioctl(struct tty_struct *tty,
/*
* these need special handlers for incompatible data structures
*/
case PIO_FONTX:
case GIO_FONTX:
return compat_fontx_ioctl(vc, cmd, up, perm, &op);
case KDFONTOP:
return compat_kdfontop_ioctl(up, perm, &op, vc);

19
drivers/video/console/vgacon.c
View File

@ -90,7 +90,6 @@ static unsigned int vga_video_num_lines; /* Number of text lines */
static bool vga_can_do_color; /* Do we support colors? */
static unsigned int vga_default_font_height __read_mostly; /* Height of default screen font */
static unsigned char vga_video_type __read_mostly; /* Card type */
static bool vga_font_is_default = true;
static int vga_vesa_blanked;
static bool vga_palette_blanked;
static bool vga_is_gfx;
@ -878,7 +877,6 @@ static int vgacon_do_font_op(struct vgastate *state, char *arg, int set,
beg = 0x0a;
}
#ifdef BROKEN_GRAPHICS_PROGRAMS
/*
* All fonts are loaded in slot 0 (0:1 for 512 ch)
*/
@ -886,24 +884,7 @@ static int vgacon_do_font_op(struct vgastate *state, char *arg, int set,
if (!arg)
return -EINVAL; /* Return to default font not supported */
vga_font_is_default = false;
font_select = ch512 ? 0x04 : 0x00;
#else
/*
* The default font is kept in slot 0 and is never touched.
* A custom font is loaded in slot 2 (256 ch) or 2:3 (512 ch)
*/
if (set) {
vga_font_is_default = !arg;
if (!arg)
ch512 = false; /* Default font is always 256 */
font_select = arg ? (ch512 ? 0x0e : 0x0a) : 0x00;
}
if (!vga_font_is_default)
charmap += 4 * cmapsz;
#endif
raw_spin_lock_irq(&vga_lock);
/* First, the Sequencer */

10
include/linux/kbd_kern.h
View File

@ -6,8 +6,6 @@
#include <linux/interrupt.h>
#include <linux/keyboard.h>
extern struct tasklet_struct keyboard_tasklet;
extern char *func_table[MAX_NR_FUNC];
/*
@ -71,12 +69,6 @@ extern void (*kbd_ledfunc)(unsigned int led);
extern int set_console(int nr);
extern void schedule_console_callback(void);
/* FIXME: review locking for vt.c callers */
static inline void set_leds(void)
{
tasklet_schedule(&keyboard_tasklet);
}
static inline int vc_kbd_mode(struct kbd_struct * kbd, int flag)
{
return ((kbd->modeflags >> flag) & 1);
@ -135,7 +127,7 @@ static inline void chg_vc_kbd_led(struct kbd_struct * kbd, int flag)
struct console;
void compute_shiftstate(void);
void vt_set_leds_compute_shiftstate(void);
/* defkeymap.c */

8
include/linux/kd.h
View File

@ -1,8 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KD_H
#define _LINUX_KD_H
#include <uapi/linux/kd.h>
#define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface [compat] */
#endif /* _LINUX_KD_H */

19
include/linux/platform_data/efm32-uart.h
View File

@ -1,19 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
*
*
*/
#ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__
#define __LINUX_PLATFORM_DATA_EFM32_UART_H__
#include <linux/types.h>
/**
* struct efm32_uart_pdata
* @location: pinmux location for the I/O pins (to be written to the ROUTE
* register)
*/
struct efm32_uart_pdata {
u8 location;
};
#endif /* ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__ */

15
include/linux/spi/ifx_modem.h
View File

@ -1,15 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef LINUX_IFX_MODEM_H
#define LINUX_IFX_MODEM_H
struct ifx_modem_platform_data {
unsigned short tx_pwr; /* modem power threshold */
unsigned char modem_type; /* Modem type */
unsigned long max_hz; /* max SPI frequency */
unsigned short use_dma:1; /* spi protocol driver supplies
dma-able addrs */
};
#define IFX_MODEM_6160 1
#define IFX_MODEM_6260 2
#endif

11
include/linux/tty.h
View File

@ -240,8 +240,7 @@ struct tty_port {
wait_queue_head_t delta_msr_wait; /* Modem status change */
unsigned long flags; /* User TTY flags ASYNC_ */
unsigned long iflags; /* Internal flags TTY_PORT_ */
unsigned char console:1, /* port is a console */
low_latency:1; /* optional: tune for latency */
unsigned char console:1; /* port is a console */
struct mutex mutex; /* Locking */
struct mutex buf_mutex; /* Buffer alloc lock */
unsigned char *xmit_buf; /* Optional buffer */
@ -416,12 +415,14 @@ extern struct tty_struct *get_current_tty(void);
/* tty_io.c */
extern int __init tty_init(void);
extern const char *tty_name(const struct tty_struct *tty);
extern struct tty_struct *tty_kopen(dev_t device);
extern struct tty_struct *tty_kopen_exclusive(dev_t device);
extern struct tty_struct *tty_kopen_shared(dev_t device);
extern void tty_kclose(struct tty_struct *tty);
extern int tty_dev_name_to_number(const char *name, dev_t *number);
extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout);
extern void tty_ldisc_unlock(struct tty_struct *tty);
extern ssize_t redirected_tty_write(struct kiocb *, struct iov_iter *);
extern struct file *tty_release_redirect(struct tty_struct *tty);
#else
static inline void tty_kref_put(struct tty_struct *tty)
{ }
@ -442,7 +443,7 @@ static inline int __init tty_init(void)
{ return 0; }
static inline const char *tty_name(const struct tty_struct *tty)
{ return "(none)"; }
static inline struct tty_struct *tty_kopen(dev_t device)
static inline struct tty_struct *tty_kopen_exclusive(dev_t device)
{ return ERR_PTR(-ENODEV); }
static inline void tty_kclose(struct tty_struct *tty)
{ }
@ -500,6 +501,8 @@ extern void tty_unthrottle(struct tty_struct *tty);
extern int tty_throttle_safe(struct tty_struct *tty);
extern int tty_unthrottle_safe(struct tty_struct *tty);
extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
extern int tty_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount);
extern int is_current_pgrp_orphaned(void);
extern void tty_hangup(struct tty_struct *tty);
extern void tty_vhangup(struct tty_struct *tty);

3
include/linux/tty_ldisc.h
View File

@ -185,7 +185,8 @@ struct tty_ldisc_ops {
void (*close)(struct tty_struct *);
void (*flush_buffer)(struct tty_struct *tty);
ssize_t (*read)(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr);
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset);
ssize_t (*write)(struct tty_struct *tty, struct file *file,
const unsigned char *buf, size_t nr);
int (*ioctl)(struct tty_struct *tty, struct file *file,

12
include/linux/vt_kern.h
View File

@ -16,18 +16,6 @@
#include <linux/consolemap.h>
#include <linux/notifier.h>
/*
* Presently, a lot of graphics programs do not restore the contents of
* the higher font pages. Defining this flag will avoid use of them, but
* will lose support for PIO_FONTRESET. Note that many font operations are
* not likely to work with these programs anyway; they need to be
* fixed. The linux/Documentation directory includes a code snippet
* to save and restore the text font.
*/
#ifdef CONFIG_VGA_CONSOLE
#define BROKEN_GRAPHICS_PROGRAMS 1
#endif
void kd_mksound(unsigned int hz, unsigned int ticks);
int kbd_rate(struct kbd_repeat *rep);

3
include/uapi/linux/serial_core.h
View File

@ -208,9 +208,6 @@
/* Atheros AR933X SoC */
#define PORT_AR933X 99
/* Energy Micro efm32 SoC */
#define PORT_EFMUART 100
/* ARC (Synopsys) on-chip UART */
#define PORT_ARC 101

15
include/uapi/linux/termios.h
View File

@ -5,19 +5,4 @@
#include <linux/types.h>
#include <asm/termios.h>
#define NFF 5
struct termiox
{
__u16 x_hflag;
__u16 x_cflag;
__u16 x_rflag[NFF];
__u16 x_sflag;
};
#define RTSXOFF 0x0001 /* RTS flow control on input */
#define CTSXON 0x0002 /* CTS flow control on output */
#define DTRXOFF 0x0004 /* DTR flow control on input */
#define DSRXON 0x0008 /* DCD flow control on output */
#endif

3
net/nfc/nci/uart.c
View File

@ -292,7 +292,8 @@ static int nci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
/* We don't provide read/write/poll interface for user space. */
static ssize_t nci_uart_tty_read(struct tty_struct *tty, struct file *file,
unsigned char __user *buf, size_t nr)
unsigned char *buf, size_t nr,
void **cookie, unsigned long offset)
{
return 0;
}