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Commit e6bf3cc5 authored by Arnd Bergmann's avatar Arnd Bergmann
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tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers 

The blackfin architecture is getting removed, so these drivers
are not needed any more.
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: default avatarAaron Wu <aaron.wu@analog.com>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent b716d38c
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drivers/tty/Kconfig
View file @ e6bf3cc5
......@@ -151,19 +151,6 @@ config LEGACY_PTY_COUNT
When not in use, each legacy PTY occupies 12 bytes on 32-bit
architectures and 24 bytes on 64-bit architectures.
config BFIN_JTAG_COMM
tristate "Blackfin JTAG Communication"
depends on BLACKFIN
help
Add support for emulating a TTY device over the Blackfin JTAG.
To compile this driver as a module, choose M here: the
module will be called bfin_jtag_comm.
config BFIN_JTAG_COMM_CONSOLE
bool "Console on Blackfin JTAG"
depends on BFIN_JTAG_COMM=y
config SERIAL_NONSTANDARD
bool "Non-standard serial port support"
depends on HAS_IOMEM
......
drivers/tty/Makefile
View file @ e6bf3cc5
......@@ -20,7 +20,6 @@ obj-$(CONFIG_SERIAL_DEV_BUS) += serdev/
# tty drivers
obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o
obj-$(CONFIG_BFIN_JTAG_COMM) += bfin_jtag_comm.o
obj-$(CONFIG_CYCLADES) += cyclades.o
obj-$(CONFIG_ISI) += isicom.o
obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
......
drivers/tty/bfin_jtag_comm.c deleted 100644 → 0
View file @ b716d38c
// SPDX-License-Identifier: GPL-2.0+
/*
* TTY over Blackfin JTAG Communication
*
* Copyright 2008-2009 Analog Devices Inc.
*
* Enter bugs at http://blackfin.uclinux.org/
*/
#define DRV_NAME "bfin-jtag-comm"
#define DEV_NAME "ttyBFJC"
#define pr_fmt(fmt) DRV_NAME ": " fmt
#include <linux/circ_buf.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/atomic.h>
#define pr_init(fmt, args...) ({ static const __initconst char __fmt[] = fmt; printk(__fmt, ## args); })
/* See the Debug/Emulation chapter in the HRM */
#define EMUDOF 0x00000001 /* EMUDAT_OUT full & valid */
#define EMUDIF 0x00000002 /* EMUDAT_IN full & valid */
#define EMUDOOVF 0x00000004 /* EMUDAT_OUT overflow */
#define EMUDIOVF 0x00000008 /* EMUDAT_IN overflow */
static inline uint32_t bfin_write_emudat(uint32_t emudat)
{
__asm__ __volatile__("emudat = %0;" : : "d"(emudat));
return emudat;
}
static inline uint32_t bfin_read_emudat(void)
{
uint32_t emudat;
__asm__ __volatile__("%0 = emudat;" : "=d"(emudat));
return emudat;
}
static inline uint32_t bfin_write_emudat_chars(char a, char b, char c, char d)
{
return bfin_write_emudat((a << 0) | (b << 8) | (c << 16) | (d << 24));
}
#define CIRC_SIZE 2048 /* see comment in tty_io.c:do_tty_write() */
#define CIRC_MASK (CIRC_SIZE - 1)
#define circ_empty(circ) ((circ)->head == (circ)->tail)
#define circ_free(circ) CIRC_SPACE((circ)->head, (circ)->tail, CIRC_SIZE)
#define circ_cnt(circ) CIRC_CNT((circ)->head, (circ)->tail, CIRC_SIZE)
#define circ_byte(circ, idx) ((circ)->buf[(idx) & CIRC_MASK])
static struct tty_driver *bfin_jc_driver;
static struct task_struct *bfin_jc_kthread;
static struct tty_port port;
static volatile struct circ_buf bfin_jc_write_buf;
static int
bfin_jc_emudat_manager(void *arg)
{
uint32_t inbound_len = 0, outbound_len = 0;
while (!kthread_should_stop()) {
struct tty_struct *tty = tty_port_tty_get(&port);
/* no one left to give data to, so sleep */
if (tty == NULL && circ_empty(&bfin_jc_write_buf)) {
pr_debug("waiting for readers\n");
__set_current_state(TASK_UNINTERRUPTIBLE);
schedule();
continue;
}
/* no data available, so just chill */
if (!(bfin_read_DBGSTAT() & EMUDIF) && circ_empty(&bfin_jc_write_buf)) {
pr_debug("waiting for data (in_len = %i) (circ: %i %i)\n",
inbound_len, bfin_jc_write_buf.tail, bfin_jc_write_buf.head);
tty_kref_put(tty);
if (inbound_len)
schedule();
else
schedule_timeout_interruptible(HZ);
continue;
}
/* if incoming data is ready, eat it */
if (bfin_read_DBGSTAT() & EMUDIF) {
uint32_t emudat = bfin_read_emudat();
if (inbound_len == 0) {
pr_debug("incoming length: 0x%08x\n", emudat);
inbound_len = emudat;
} else {
size_t num_chars = (4 <= inbound_len ? 4 : inbound_len);
pr_debug(" incoming data: 0x%08x (pushing %zu)\n", emudat, num_chars);
inbound_len -= num_chars;
tty_insert_flip_string(&port, (unsigned char *)&emudat, num_chars);
tty_flip_buffer_push(&port);
}
}
/* if outgoing data is ready, post it */
if (!(bfin_read_DBGSTAT() & EMUDOF) && !circ_empty(&bfin_jc_write_buf)) {
if (outbound_len == 0) {
outbound_len = circ_cnt(&bfin_jc_write_buf);
bfin_write_emudat(outbound_len);
pr_debug("outgoing length: 0x%08x\n", outbound_len);
} else {
int tail = bfin_jc_write_buf.tail;
size_t ate = (4 <= outbound_len ? 4 : outbound_len);
uint32_t emudat =
bfin_write_emudat_chars(
circ_byte(&bfin_jc_write_buf, tail + 0),
circ_byte(&bfin_jc_write_buf, tail + 1),
circ_byte(&bfin_jc_write_buf, tail + 2),
circ_byte(&bfin_jc_write_buf, tail + 3)
);
bfin_jc_write_buf.tail += ate;
outbound_len -= ate;
if (tty)
tty_wakeup(tty);
pr_debug(" outgoing data: 0x%08x (pushing %zu)\n", emudat, ate);
}
}
tty_kref_put(tty);
}
__set_current_state(TASK_RUNNING);
return 0;
}
static int
bfin_jc_open(struct tty_struct *tty, struct file *filp)
{
unsigned long flags;
spin_lock_irqsave(&port.lock, flags);
port.count++;
spin_unlock_irqrestore(&port.lock, flags);
tty_port_tty_set(&port, tty);
wake_up_process(bfin_jc_kthread);
return 0;
}
static void
bfin_jc_close(struct tty_struct *tty, struct file *filp)
{
unsigned long flags;
bool last;
spin_lock_irqsave(&port.lock, flags);
last = --port.count == 0;
spin_unlock_irqrestore(&port.lock, flags);
if (last)
tty_port_tty_set(&port, NULL);
wake_up_process(bfin_jc_kthread);
}
/* XXX: we dont handle the put_char() case where we must handle count = 1 */
static int
bfin_jc_circ_write(const unsigned char *buf, int count)
{
int i;
count = min(count, circ_free(&bfin_jc_write_buf));
pr_debug("going to write chunk of %i bytes\n", count);
for (i = 0; i < count; ++i)
circ_byte(&bfin_jc_write_buf, bfin_jc_write_buf.head + i) = buf[i];
bfin_jc_write_buf.head += i;
return i;
}
#ifndef CONFIG_BFIN_JTAG_COMM_CONSOLE
# define console_lock()
# define console_unlock()
#endif
static int
bfin_jc_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
int i;
console_lock();
i = bfin_jc_circ_write(buf, count);
console_unlock();
wake_up_process(bfin_jc_kthread);
return i;
}
static void
bfin_jc_flush_chars(struct tty_struct *tty)
{
wake_up_process(bfin_jc_kthread);
}
static int
bfin_jc_write_room(struct tty_struct *tty)
{
return circ_free(&bfin_jc_write_buf);
}
static int
bfin_jc_chars_in_buffer(struct tty_struct *tty)
{
return circ_cnt(&bfin_jc_write_buf);
}
static const struct tty_operations bfin_jc_ops = {
.open = bfin_jc_open,
.close = bfin_jc_close,
.write = bfin_jc_write,
/*.put_char = bfin_jc_put_char,*/
.flush_chars = bfin_jc_flush_chars,
.write_room = bfin_jc_write_room,
.chars_in_buffer = bfin_jc_chars_in_buffer,
};
static int __init bfin_jc_init(void)
{
int ret;
bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
if (IS_ERR(bfin_jc_kthread))
return PTR_ERR(bfin_jc_kthread);
ret = -ENOMEM;
bfin_jc_write_buf.head = bfin_jc_write_buf.tail = 0;
bfin_jc_write_buf.buf = kmalloc(CIRC_SIZE, GFP_KERNEL);
if (!bfin_jc_write_buf.buf)
goto err_buf;
bfin_jc_driver = alloc_tty_driver(1);
if (!bfin_jc_driver)
goto err_driver;
tty_port_init(&port);
bfin_jc_driver->driver_name = DRV_NAME;
bfin_jc_driver->name = DEV_NAME;
bfin_jc_driver->type = TTY_DRIVER_TYPE_SERIAL;
bfin_jc_driver->subtype = SERIAL_TYPE_NORMAL;
bfin_jc_driver->init_termios = tty_std_termios;
tty_set_operations(bfin_jc_driver, &bfin_jc_ops);
tty_port_link_device(&port, bfin_jc_driver, 0);
ret = tty_register_driver(bfin_jc_driver);
if (ret)
goto err;
pr_init(KERN_INFO DRV_NAME ": initialized\n");
return 0;
err:
tty_port_destroy(&port);
put_tty_driver(bfin_jc_driver);
err_driver:
kfree(bfin_jc_write_buf.buf);
err_buf:
kthread_stop(bfin_jc_kthread);
return ret;
}
module_init(bfin_jc_init);
static void __exit bfin_jc_exit(void)
{
kthread_stop(bfin_jc_kthread);
kfree(bfin_jc_write_buf.buf);
tty_unregister_driver(bfin_jc_driver);
put_tty_driver(bfin_jc_driver);
tty_port_destroy(&port);
}
module_exit(bfin_jc_exit);
#if defined(CONFIG_BFIN_JTAG_COMM_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
static void
bfin_jc_straight_buffer_write(const char *buf, unsigned count)
{
unsigned ate = 0;
while (bfin_read_DBGSTAT() & EMUDOF)
continue;
bfin_write_emudat(count);
while (ate < count) {
while (bfin_read_DBGSTAT() & EMUDOF)
continue;
bfin_write_emudat_chars(buf[ate], buf[ate+1], buf[ate+2], buf[ate+3]);
ate += 4;
}
}
#endif
#ifdef CONFIG_BFIN_JTAG_COMM_CONSOLE
static void
bfin_jc_console_write(struct console *co, const char *buf, unsigned count)
{
if (bfin_jc_kthread == NULL)
bfin_jc_straight_buffer_write(buf, count);
else
bfin_jc_circ_write(buf, count);
}
static struct tty_driver *
bfin_jc_console_device(struct console *co, int *index)
{
*index = co->index;
return bfin_jc_driver;
}
static struct console bfin_jc_console = {
.name = DEV_NAME,
.write = bfin_jc_console_write,
.device = bfin_jc_console_device,
.flags = CON_ANYTIME | CON_PRINTBUFFER,
.index = -1,
};
static int __init bfin_jc_console_init(void)
{
register_console(&bfin_jc_console);
return 0;
}
console_initcall(bfin_jc_console_init);
#endif
#ifdef CONFIG_EARLY_PRINTK
static void __init
bfin_jc_early_write(struct console *co, const char *buf, unsigned int count)
{
bfin_jc_straight_buffer_write(buf, count);
}
static struct console bfin_jc_early_console __initdata = {
.name = "early_BFJC",
.write = bfin_jc_early_write,
.flags = CON_ANYTIME | CON_PRINTBUFFER,
.index = -1,
};
struct console * __init
bfin_jc_early_init(unsigned int port, unsigned int cflag)
{
return &bfin_jc_early_console;
}
#endif
MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>");
MODULE_DESCRIPTION("TTY over Blackfin JTAG Communication");
MODULE_LICENSE("GPL");
drivers/tty/hvc/Kconfig
View file @ e6bf3cc5
......@@ -88,15 +88,6 @@ config HVC_DCC
driver. This console is used through a JTAG only on ARM. If you don't have
a JTAG then you probably don't want this option.
config HVC_BFIN_JTAG
bool "Blackfin JTAG console"
depends on BLACKFIN
select HVC_DRIVER
help
This console uses the Blackfin JTAG to create a console under the
the HVC driver. If you don't have JTAG, then you probably don't
want this option.
config HVCS
tristate "IBM Hypervisor Virtual Console Server support"
depends on PPC_PSERIES && HVC_CONSOLE
......
drivers/tty/hvc/Makefile
View file @ e6bf3cc5
......@@ -10,5 +10,4 @@ obj-$(CONFIG_HVC_IRQ) += hvc_irq.o
obj-$(CONFIG_HVC_XEN) += hvc_xen.o
obj-$(CONFIG_HVC_IUCV) += hvc_iucv.o
obj-$(CONFIG_HVC_UDBG) += hvc_udbg.o
obj-$(CONFIG_HVC_BFIN_JTAG) += hvc_bfin_jtag.o
obj-$(CONFIG_HVCS) += hvcs.o
drivers/tty/hvc/hvc_bfin_jtag.c deleted 100644 → 0
View file @ b716d38c
// SPDX-License-Identifier: GPL-2.0+
/*
* Console via Blackfin JTAG Communication
*
* Copyright 2008-2011 Analog Devices Inc.
*
* Enter bugs at http://blackfin.uclinux.org/
*/
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include "hvc_console.h"
/* See the Debug/Emulation chapter in the HRM */
#define EMUDOF 0x00000001 /* EMUDAT_OUT full & valid */
#define EMUDIF 0x00000002 /* EMUDAT_IN full & valid */
#define EMUDOOVF 0x00000004 /* EMUDAT_OUT overflow */
#define EMUDIOVF 0x00000008 /* EMUDAT_IN overflow */
/* Helper functions to glue the register API to simple C operations */
static inline uint32_t bfin_write_emudat(uint32_t emudat)
{
__asm__ __volatile__("emudat = %0;" : : "d"(emudat));
return emudat;
}
static inline uint32_t bfin_read_emudat(void)
{
uint32_t emudat;
__asm__ __volatile__("%0 = emudat;" : "=d"(emudat));
return emudat;
}
/* Send data to the host */
static int hvc_bfin_put_chars(uint32_t vt, const char *buf, int count)
{
static uint32_t outbound_len;
uint32_t emudat;
int ret;
if (bfin_read_DBGSTAT() & EMUDOF)
return 0;
if (!outbound_len) {
outbound_len = count;
bfin_write_emudat(outbound_len);
return 0;
}
ret = min(outbound_len, (uint32_t)4);
memcpy(&emudat, buf, ret);
bfin_write_emudat(emudat);
outbound_len -= ret;
return ret;
}
/* Receive data from the host */
static int hvc_bfin_get_chars(uint32_t vt, char *buf, int count)
{
static uint32_t inbound_len;
uint32_t emudat;
int ret;
if (!(bfin_read_DBGSTAT() & EMUDIF))
return 0;
emudat = bfin_read_emudat();
if (!inbound_len) {
inbound_len = emudat;
return 0;
}
ret = min(inbound_len, (uint32_t)4);
memcpy(buf, &emudat, ret);
inbound_len -= ret;
return ret;
}
/* Glue the HVC layers to the Blackfin layers */
static const struct hv_ops hvc_bfin_get_put_ops = {
.get_chars = hvc_bfin_get_chars,
.put_chars = hvc_bfin_put_chars,
};
static int __init hvc_bfin_console_init(void)
{
hvc_instantiate(0, 0, &hvc_bfin_get_put_ops);
return 0;
}
console_initcall(hvc_bfin_console_init);
static int __init hvc_bfin_init(void)
{
hvc_alloc(0, 0, &hvc_bfin_get_put_ops, 128);
return 0;
}
device_initcall(hvc_bfin_init);
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