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-rw-r--r--drivers/isdn/capi/capi.c9
-rw-r--r--drivers/misc/pti.c6
-rw-r--r--drivers/mmc/card/sdio_uart.c9
-rw-r--r--drivers/tty/hvc/hvc_beat.c2
-rw-r--r--drivers/tty/hvc/hvc_rtas.c2
-rw-r--r--drivers/tty/hvc/hvc_udbg.c2
-rw-r--r--drivers/tty/hvc/hvc_xen.c2
-rw-r--r--drivers/tty/hvc/hvcs.c4
-rw-r--r--drivers/tty/hvc/hvsi.c2
-rw-r--r--drivers/tty/nozomi.c8
-rw-r--r--drivers/tty/pty.c68
-rw-r--r--drivers/tty/serial/21285.c4
-rw-r--r--drivers/tty/serial/8250/8250.c21
-rw-r--r--drivers/tty/serial/Kconfig13
-rw-r--r--drivers/tty/serial/Makefile3
-rw-r--r--drivers/tty/serial/altera_uart.c47
-rw-r--r--drivers/tty/serial/efm32-uart.c830
-rw-r--r--drivers/tty/serial/m32r_sio.c11
-rw-r--r--drivers/tty/serial/mpc52xx_uart.c4
-rw-r--r--drivers/tty/serial/mux.c2
-rw-r--r--drivers/tty/serial/pch_uart.c115
-rw-r--r--drivers/tty/serial/pmac_zilog.c2
-rw-r--r--drivers/tty/serial/sunzilog.c10
-rw-r--r--drivers/tty/serial/ucc_uart.c2
-rw-r--r--drivers/tty/serial/vr41xx_siu.c4
-rw-r--r--drivers/tty/sysrq.c11
-rw-r--r--drivers/tty/tty_io.c44
-rw-r--r--drivers/usb/serial/usb-serial.c16
28 files changed, 1033 insertions, 220 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index e44933d58790..94948be5d366 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1015,14 +1015,11 @@ capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
1015{ 1015{
1016 int idx = tty->index; 1016 int idx = tty->index;
1017 struct capiminor *mp = capiminor_get(idx); 1017 struct capiminor *mp = capiminor_get(idx);
1018 int ret = tty_init_termios(tty); 1018 int ret = tty_standard_install(driver, tty);
1019 1019
1020 if (ret == 0) { 1020 if (ret == 0)
1021 tty_driver_kref_get(driver);
1022 tty->count++;
1023 tty->driver_data = mp; 1021 tty->driver_data = mp;
1024 driver->ttys[idx] = tty; 1022 else
1025 } else
1026 capiminor_put(mp); 1023 capiminor_put(mp);
1027 return ret; 1024 return ret;
1028} 1025}
diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c
index 0b56e3f43573..471ff4c85cd8 100644
--- a/drivers/misc/pti.c
+++ b/drivers/misc/pti.c
@@ -481,13 +481,9 @@ static int pti_tty_install(struct tty_driver *driver, struct tty_struct *tty)
481{ 481{
482 int idx = tty->index; 482 int idx = tty->index;
483 struct pti_tty *pti_tty_data; 483 struct pti_tty *pti_tty_data;
484 int ret = tty_init_termios(tty); 484 int ret = tty_standard_install(driver, tty);
485 485
486 if (ret == 0) { 486 if (ret == 0) {
487 tty_driver_kref_get(driver);
488 tty->count++;
489 driver->ttys[idx] = tty;
490
491 pti_tty_data = kmalloc(sizeof(struct pti_tty), GFP_KERNEL); 487 pti_tty_data = kmalloc(sizeof(struct pti_tty), GFP_KERNEL);
492 if (pti_tty_data == NULL) 488 if (pti_tty_data == NULL)
493 return -ENOMEM; 489 return -ENOMEM;
diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c
index 2c151e18c9e8..bd4a67cdac3f 100644
--- a/drivers/mmc/card/sdio_uart.c
+++ b/drivers/mmc/card/sdio_uart.c
@@ -750,15 +750,12 @@ static int sdio_uart_install(struct tty_driver *driver, struct tty_struct *tty)
750{ 750{
751 int idx = tty->index; 751 int idx = tty->index;
752 struct sdio_uart_port *port = sdio_uart_port_get(idx); 752 struct sdio_uart_port *port = sdio_uart_port_get(idx);
753 int ret = tty_init_termios(tty); 753 int ret = tty_standard_install(driver, tty);
754 754
755 if (ret == 0) { 755 if (ret == 0)
756 tty_driver_kref_get(driver);
757 tty->count++;
758 /* This is the ref sdio_uart_port get provided */ 756 /* This is the ref sdio_uart_port get provided */
759 tty->driver_data = port; 757 tty->driver_data = port;
760 driver->ttys[idx] = tty; 758 else
761 } else
762 sdio_uart_port_put(port); 759 sdio_uart_port_put(port);
763 return ret; 760 return ret;
764} 761}
diff --git a/drivers/tty/hvc/hvc_beat.c b/drivers/tty/hvc/hvc_beat.c
index 5fe4631e2a61..1560d235449e 100644
--- a/drivers/tty/hvc/hvc_beat.c
+++ b/drivers/tty/hvc/hvc_beat.c
@@ -113,7 +113,7 @@ static int __init hvc_beat_init(void)
113 if (!firmware_has_feature(FW_FEATURE_BEAT)) 113 if (!firmware_has_feature(FW_FEATURE_BEAT))
114 return -ENODEV; 114 return -ENODEV;
115 115
116 hp = hvc_alloc(0, NO_IRQ, &hvc_beat_get_put_ops, 16); 116 hp = hvc_alloc(0, 0, &hvc_beat_get_put_ops, 16);
117 if (IS_ERR(hp)) 117 if (IS_ERR(hp))
118 return PTR_ERR(hp); 118 return PTR_ERR(hp);
119 hvc_beat_dev = hp; 119 hvc_beat_dev = hp;
diff --git a/drivers/tty/hvc/hvc_rtas.c b/drivers/tty/hvc/hvc_rtas.c
index 61c4a61558d9..0069bb86ba49 100644
--- a/drivers/tty/hvc/hvc_rtas.c
+++ b/drivers/tty/hvc/hvc_rtas.c
@@ -94,7 +94,7 @@ static int __init hvc_rtas_init(void)
94 94
95 /* Allocate an hvc_struct for the console device we instantiated 95 /* Allocate an hvc_struct for the console device we instantiated
96 * earlier. Save off hp so that we can return it on exit */ 96 * earlier. Save off hp so that we can return it on exit */
97 hp = hvc_alloc(hvc_rtas_cookie, NO_IRQ, &hvc_rtas_get_put_ops, 16); 97 hp = hvc_alloc(hvc_rtas_cookie, 0, &hvc_rtas_get_put_ops, 16);
98 if (IS_ERR(hp)) 98 if (IS_ERR(hp))
99 return PTR_ERR(hp); 99 return PTR_ERR(hp);
100 100
diff --git a/drivers/tty/hvc/hvc_udbg.c b/drivers/tty/hvc/hvc_udbg.c
index b0957e61a7be..4c9b13e7748c 100644
--- a/drivers/tty/hvc/hvc_udbg.c
+++ b/drivers/tty/hvc/hvc_udbg.c
@@ -69,7 +69,7 @@ static int __init hvc_udbg_init(void)
69 69
70 BUG_ON(hvc_udbg_dev); 70 BUG_ON(hvc_udbg_dev);
71 71
72 hp = hvc_alloc(0, NO_IRQ, &hvc_udbg_ops, 16); 72 hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16);
73 if (IS_ERR(hp)) 73 if (IS_ERR(hp))
74 return PTR_ERR(hp); 74 return PTR_ERR(hp);
75 75
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 52fdf60bdbe2..a1b0a75c3eae 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -176,7 +176,7 @@ static int __init xen_hvc_init(void)
176 xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn); 176 xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn);
177 } 177 }
178 if (xencons_irq < 0) 178 if (xencons_irq < 0)
179 xencons_irq = 0; /* NO_IRQ */ 179 xencons_irq = 0;
180 else 180 else
181 irq_set_noprobe(xencons_irq); 181 irq_set_noprobe(xencons_irq);
182 182
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index b9040bec36bd..df7e7a0a5e6c 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -1203,7 +1203,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
1203{ 1203{
1204 struct hvcs_struct *hvcsd; 1204 struct hvcs_struct *hvcsd;
1205 unsigned long flags; 1205 unsigned long flags;
1206 int irq = NO_IRQ; 1206 int irq;
1207 1207
1208 /* 1208 /*
1209 * Is someone trying to close the file associated with this device after 1209 * Is someone trying to close the file associated with this device after
@@ -1264,7 +1264,7 @@ static void hvcs_hangup(struct tty_struct * tty)
1264 struct hvcs_struct *hvcsd = tty->driver_data; 1264 struct hvcs_struct *hvcsd = tty->driver_data;
1265 unsigned long flags; 1265 unsigned long flags;
1266 int temp_open_count; 1266 int temp_open_count;
1267 int irq = NO_IRQ; 1267 int irq;
1268 1268
1269 spin_lock_irqsave(&hvcsd->lock, flags); 1269 spin_lock_irqsave(&hvcsd->lock, flags);
1270 /* Preserve this so that we know how many kref refs to put */ 1270 /* Preserve this so that we know how many kref refs to put */
diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
index cdfa3e02d627..1b5f28bd7930 100644
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -1237,7 +1237,7 @@ static int __init hvsi_console_init(void)
1237 hp->state = HVSI_CLOSED; 1237 hp->state = HVSI_CLOSED;
1238 hp->vtermno = *vtermno; 1238 hp->vtermno = *vtermno;
1239 hp->virq = irq_create_mapping(NULL, irq[0]); 1239 hp->virq = irq_create_mapping(NULL, irq[0]);
1240 if (hp->virq == NO_IRQ) { 1240 if (hp->virq == 0) {
1241 printk(KERN_ERR "%s: couldn't create irq mapping for 0x%x\n", 1241 printk(KERN_ERR "%s: couldn't create irq mapping for 0x%x\n",
1242 __func__, irq[0]); 1242 __func__, irq[0]);
1243 continue; 1243 continue;
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index fd347ff34d07..580da78b2d86 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -1602,13 +1602,9 @@ static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
1602 int ret; 1602 int ret;
1603 if (!port || !dc || dc->state != NOZOMI_STATE_READY) 1603 if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1604 return -ENODEV; 1604 return -ENODEV;
1605 ret = tty_init_termios(tty); 1605 ret = tty_standard_install(driver, tty);
1606 if (ret == 0) { 1606 if (ret == 0)
1607 tty_driver_kref_get(driver);
1608 tty->count++;
1609 tty->driver_data = port; 1607 tty->driver_data = port;
1610 driver->ttys[tty->index] = tty;
1611 }
1612 return ret; 1608 return ret;
1613} 1609}
1614 1610
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index d8653ab6f498..39afd045f8ef 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -21,7 +21,6 @@
21#include <linux/major.h> 21#include <linux/major.h>
22#include <linux/mm.h> 22#include <linux/mm.h>
23#include <linux/init.h> 23#include <linux/init.h>
24#include <linux/sysctl.h>
25#include <linux/device.h> 24#include <linux/device.h>
26#include <linux/uaccess.h> 25#include <linux/uaccess.h>
27#include <linux/bitops.h> 26#include <linux/bitops.h>
@@ -55,11 +54,8 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
55 wake_up_interruptible(&tty->link->write_wait); 54 wake_up_interruptible(&tty->link->write_wait);
56 if (tty->driver->subtype == PTY_TYPE_MASTER) { 55 if (tty->driver->subtype == PTY_TYPE_MASTER) {
57 set_bit(TTY_OTHER_CLOSED, &tty->flags); 56 set_bit(TTY_OTHER_CLOSED, &tty->flags);
58#ifdef CONFIG_UNIX98_PTYS
59 if (tty->driver == ptm_driver)
60 devpts_pty_kill(tty->link);
61#endif
62 tty_unlock(); 57 tty_unlock();
58 devpts_pty_kill(tty->link);
63 tty_vhangup(tty->link); 59 tty_vhangup(tty->link);
64 tty_lock(); 60 tty_lock();
65 } 61 }
@@ -439,55 +435,9 @@ static inline void legacy_pty_init(void) { }
439 435
440/* Unix98 devices */ 436/* Unix98 devices */
441#ifdef CONFIG_UNIX98_PTYS 437#ifdef CONFIG_UNIX98_PTYS
442/*
443 * sysctl support for setting limits on the number of Unix98 ptys allocated.
444 * Otherwise one can eat up all kernel memory by opening /dev/ptmx repeatedly.
445 */
446int pty_limit = NR_UNIX98_PTY_DEFAULT;
447static int pty_limit_min;
448static int pty_limit_max = NR_UNIX98_PTY_MAX;
449static int pty_count;
450 438
451static struct cdev ptmx_cdev; 439static struct cdev ptmx_cdev;
452 440
453static struct ctl_table pty_table[] = {
454 {
455 .procname = "max",
456 .maxlen = sizeof(int),
457 .mode = 0644,
458 .data = &pty_limit,
459 .proc_handler = proc_dointvec_minmax,
460 .extra1 = &pty_limit_min,
461 .extra2 = &pty_limit_max,
462 }, {
463 .procname = "nr",
464 .maxlen = sizeof(int),
465 .mode = 0444,
466 .data = &pty_count,
467 .proc_handler = proc_dointvec,
468 },
469 {}
470};
471
472static struct ctl_table pty_kern_table[] = {
473 {
474 .procname = "pty",
475 .mode = 0555,
476 .child = pty_table,
477 },
478 {}
479};
480
481static struct ctl_table pty_root_table[] = {
482 {
483 .procname = "kernel",
484 .mode = 0555,
485 .child = pty_kern_table,
486 },
487 {}
488};
489
490
491static int pty_unix98_ioctl(struct tty_struct *tty, 441static int pty_unix98_ioctl(struct tty_struct *tty,
492 unsigned int cmd, unsigned long arg) 442 unsigned int cmd, unsigned long arg)
493{ 443{
@@ -515,10 +465,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
515static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver, 465static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
516 struct inode *ptm_inode, int idx) 466 struct inode *ptm_inode, int idx)
517{ 467{
518 struct tty_struct *tty = devpts_get_tty(ptm_inode, idx); 468 /* Master must be open via /dev/ptmx */
519 if (tty) 469 return ERR_PTR(-EIO);
520 tty = tty->link;
521 return tty;
522} 470}
523 471
524/** 472/**
@@ -589,7 +537,6 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
589 */ 537 */
590 tty_driver_kref_get(driver); 538 tty_driver_kref_get(driver);
591 tty->count++; 539 tty->count++;
592 pty_count++;
593 return 0; 540 return 0;
594err_free_mem: 541err_free_mem:
595 deinitialize_tty_struct(o_tty); 542 deinitialize_tty_struct(o_tty);
@@ -603,7 +550,6 @@ err_free_tty:
603 550
604static void ptm_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) 551static void ptm_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
605{ 552{
606 pty_count--;
607} 553}
608 554
609static void pts_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) 555static void pts_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
@@ -667,9 +613,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
667 return retval; 613 return retval;
668 614
669 /* find a device that is not in use. */ 615 /* find a device that is not in use. */
670 tty_lock();
671 index = devpts_new_index(inode); 616 index = devpts_new_index(inode);
672 tty_unlock();
673 if (index < 0) { 617 if (index < 0) {
674 retval = index; 618 retval = index;
675 goto err_file; 619 goto err_file;
@@ -677,7 +621,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
677 621
678 mutex_lock(&tty_mutex); 622 mutex_lock(&tty_mutex);
679 tty_lock(); 623 tty_lock();
680 tty = tty_init_dev(ptm_driver, index, 1); 624 tty = tty_init_dev(ptm_driver, index);
681 mutex_unlock(&tty_mutex); 625 mutex_unlock(&tty_mutex);
682 626
683 if (IS_ERR(tty)) { 627 if (IS_ERR(tty)) {
@@ -704,8 +648,8 @@ err_release:
704 tty_release(inode, filp); 648 tty_release(inode, filp);
705 return retval; 649 return retval;
706out: 650out:
707 devpts_kill_index(inode, index);
708 tty_unlock(); 651 tty_unlock();
652 devpts_kill_index(inode, index);
709err_file: 653err_file:
710 tty_free_file(filp); 654 tty_free_file(filp);
711 return retval; 655 return retval;
@@ -762,8 +706,6 @@ static void __init unix98_pty_init(void)
762 if (tty_register_driver(pts_driver)) 706 if (tty_register_driver(pts_driver))
763 panic("Couldn't register Unix98 pts driver"); 707 panic("Couldn't register Unix98 pts driver");
764 708
765 register_sysctl_table(pty_root_table);
766
767 /* Now create the /dev/ptmx special device */ 709 /* Now create the /dev/ptmx special device */
768 tty_default_fops(&ptmx_fops); 710 tty_default_fops(&ptmx_fops);
769 ptmx_fops.open = ptmx_open; 711 ptmx_fops.open = ptmx_open;
diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c
index 1b37626e8f13..f899996b4363 100644
--- a/drivers/tty/serial/21285.c
+++ b/drivers/tty/serial/21285.c
@@ -331,7 +331,7 @@ static int serial21285_verify_port(struct uart_port *port, struct serial_struct
331 int ret = 0; 331 int ret = 0;
332 if (ser->type != PORT_UNKNOWN && ser->type != PORT_21285) 332 if (ser->type != PORT_UNKNOWN && ser->type != PORT_21285)
333 ret = -EINVAL; 333 ret = -EINVAL;
334 if (ser->irq != NO_IRQ) 334 if (ser->irq <= 0)
335 ret = -EINVAL; 335 ret = -EINVAL;
336 if (ser->baud_base != port->uartclk / 16) 336 if (ser->baud_base != port->uartclk / 16)
337 ret = -EINVAL; 337 ret = -EINVAL;
@@ -360,7 +360,7 @@ static struct uart_ops serial21285_ops = {
360static struct uart_port serial21285_port = { 360static struct uart_port serial21285_port = {
361 .mapbase = 0x42000160, 361 .mapbase = 0x42000160,
362 .iotype = UPIO_MEM, 362 .iotype = UPIO_MEM,
363 .irq = NO_IRQ, 363 .irq = 0,
364 .fifosize = 16, 364 .fifosize = 16,
365 .ops = &serial21285_ops, 365 .ops = &serial21285_ops,
366 .flags = UPF_BOOT_AUTOCONF, 366 .flags = UPF_BOOT_AUTOCONF,
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 9b7336fcfbb3..b423d0f962a2 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -86,13 +86,6 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */
86#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) 86#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
87 87
88 88
89/*
90 * We default to IRQ0 for the "no irq" hack. Some
91 * machine types want others as well - they're free
92 * to redefine this in their header file.
93 */
94#define is_real_interrupt(irq) ((irq) != 0)
95
96#ifdef CONFIG_SERIAL_8250_DETECT_IRQ 89#ifdef CONFIG_SERIAL_8250_DETECT_IRQ
97#define CONFIG_SERIAL_DETECT_IRQ 1 90#define CONFIG_SERIAL_DETECT_IRQ 1
98#endif 91#endif
@@ -1750,7 +1743,7 @@ static void serial8250_backup_timeout(unsigned long data)
1750 * Must disable interrupts or else we risk racing with the interrupt 1743 * Must disable interrupts or else we risk racing with the interrupt
1751 * based handler. 1744 * based handler.
1752 */ 1745 */
1753 if (is_real_interrupt(up->port.irq)) { 1746 if (up->port.irq) {
1754 ier = serial_in(up, UART_IER); 1747 ier = serial_in(up, UART_IER);
1755 serial_out(up, UART_IER, 0); 1748 serial_out(up, UART_IER, 0);
1756 } 1749 }
@@ -1775,7 +1768,7 @@ static void serial8250_backup_timeout(unsigned long data)
1775 if (!(iir & UART_IIR_NO_INT)) 1768 if (!(iir & UART_IIR_NO_INT))
1776 serial8250_tx_chars(up); 1769 serial8250_tx_chars(up);
1777 1770
1778 if (is_real_interrupt(up->port.irq)) 1771 if (up->port.irq)
1779 serial_out(up, UART_IER, ier); 1772 serial_out(up, UART_IER, ier);
1780 1773
1781 spin_unlock_irqrestore(&up->port.lock, flags); 1774 spin_unlock_irqrestore(&up->port.lock, flags);
@@ -2028,7 +2021,7 @@ static int serial8250_startup(struct uart_port *port)
2028 serial_outp(up, UART_LCR, 0); 2021 serial_outp(up, UART_LCR, 0);
2029 } 2022 }
2030 2023
2031 if (is_real_interrupt(up->port.irq)) { 2024 if (up->port.irq) {
2032 unsigned char iir1; 2025 unsigned char iir1;
2033 /* 2026 /*
2034 * Test for UARTs that do not reassert THRE when the 2027 * Test for UARTs that do not reassert THRE when the
@@ -2083,7 +2076,7 @@ static int serial8250_startup(struct uart_port *port)
2083 * hardware interrupt, we use a timer-based system. The original 2076 * hardware interrupt, we use a timer-based system. The original
2084 * driver used to do this with IRQ0. 2077 * driver used to do this with IRQ0.
2085 */ 2078 */
2086 if (!is_real_interrupt(up->port.irq)) { 2079 if (!up->port.irq) {
2087 up->timer.data = (unsigned long)up; 2080 up->timer.data = (unsigned long)up;
2088 mod_timer(&up->timer, jiffies + uart_poll_timeout(port)); 2081 mod_timer(&up->timer, jiffies + uart_poll_timeout(port));
2089 } else { 2082 } else {
@@ -2099,13 +2092,13 @@ static int serial8250_startup(struct uart_port *port)
2099 2092
2100 spin_lock_irqsave(&up->port.lock, flags); 2093 spin_lock_irqsave(&up->port.lock, flags);
2101 if (up->port.flags & UPF_FOURPORT) { 2094 if (up->port.flags & UPF_FOURPORT) {
2102 if (!is_real_interrupt(up->port.irq)) 2095 if (!up->port.irq)
2103 up->port.mctrl |= TIOCM_OUT1; 2096 up->port.mctrl |= TIOCM_OUT1;
2104 } else 2097 } else
2105 /* 2098 /*
2106 * Most PC uarts need OUT2 raised to enable interrupts. 2099 * Most PC uarts need OUT2 raised to enable interrupts.
2107 */ 2100 */
2108 if (is_real_interrupt(up->port.irq)) 2101 if (up->port.irq)
2109 up->port.mctrl |= TIOCM_OUT2; 2102 up->port.mctrl |= TIOCM_OUT2;
2110 2103
2111 serial8250_set_mctrl(&up->port, up->port.mctrl); 2104 serial8250_set_mctrl(&up->port, up->port.mctrl);
@@ -2223,7 +2216,7 @@ static void serial8250_shutdown(struct uart_port *port)
2223 2216
2224 del_timer_sync(&up->timer); 2217 del_timer_sync(&up->timer);
2225 up->timer.function = serial8250_timeout; 2218 up->timer.function = serial8250_timeout;
2226 if (is_real_interrupt(up->port.irq)) 2219 if (up->port.irq)
2227 serial_unlink_irq_chain(up); 2220 serial_unlink_irq_chain(up);
2228} 2221}
2229 2222
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 2de99248dfae..76e7764488e6 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1347,4 +1347,17 @@ config SERIAL_AR933X_NR_UARTS
1347 Set this to the number of serial ports you want the driver 1347 Set this to the number of serial ports you want the driver
1348 to support. 1348 to support.
1349 1349
1350config SERIAL_EFM32_UART
1351 tristate "EFM32 UART/USART port."
1352 depends on ARCH_EFM32
1353 select SERIAL_CORE
1354 help
1355 This driver support the USART and UART ports on
1356 Energy Micro's efm32 SoCs.
1357
1358config SERIAL_EFM32_UART_CONSOLE
1359 bool "EFM32 UART/USART console support"
1360 depends on SERIAL_EFM32_UART=y
1361 select SERIAL_CORE_CONSOLE
1362
1350endmenu 1363endmenu
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index fef32e10c851..7257c5d898ae 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -61,12 +61,12 @@ obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
61obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o 61obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o
62obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o 62obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o
63obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o 63obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o
64obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o
64obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o 65obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o
65obj-$(CONFIG_SERIAL_QE) += ucc_uart.o 66obj-$(CONFIG_SERIAL_QE) += ucc_uart.o
66obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o 67obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o
67obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o 68obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o
68obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o 69obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o
69obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o
70obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o 70obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o
71obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o 71obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o
72obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o 72obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o
@@ -78,3 +78,4 @@ obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o
78obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o 78obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
79obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o 79obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
80obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o 80obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o
81obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 1d04c5037f25..e7903751e058 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -377,6 +377,26 @@ static int altera_uart_verify_port(struct uart_port *port,
377 return 0; 377 return 0;
378} 378}
379 379
380#ifdef CONFIG_CONSOLE_POLL
381static int altera_uart_poll_get_char(struct uart_port *port)
382{
383 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
384 ALTERA_UART_STATUS_RRDY_MSK))
385 cpu_relax();
386
387 return altera_uart_readl(port, ALTERA_UART_RXDATA_REG);
388}
389
390static void altera_uart_poll_put_char(struct uart_port *port, unsigned char c)
391{
392 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
393 ALTERA_UART_STATUS_TRDY_MSK))
394 cpu_relax();
395
396 altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG);
397}
398#endif
399
380/* 400/*
381 * Define the basic serial functions we support. 401 * Define the basic serial functions we support.
382 */ 402 */
@@ -397,35 +417,16 @@ static struct uart_ops altera_uart_ops = {
397 .release_port = altera_uart_release_port, 417 .release_port = altera_uart_release_port,
398 .config_port = altera_uart_config_port, 418 .config_port = altera_uart_config_port,
399 .verify_port = altera_uart_verify_port, 419 .verify_port = altera_uart_verify_port,
420#ifdef CONFIG_CONSOLE_POLL
421 .poll_get_char = altera_uart_poll_get_char,
422 .poll_put_char = altera_uart_poll_put_char,
423#endif
400}; 424};
401 425
402static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS]; 426static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS];
403 427
404#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) 428#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE)
405 429
406int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp)
407{
408 struct uart_port *port;
409 int i;
410
411 for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) {
412 port = &altera_uart_ports[i].port;
413
414 port->line = i;
415 port->type = PORT_ALTERA_UART;
416 port->mapbase = platp[i].mapbase;
417 port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);
418 port->iotype = SERIAL_IO_MEM;
419 port->irq = platp[i].irq;
420 port->uartclk = platp[i].uartclk;
421 port->flags = UPF_BOOT_AUTOCONF;
422 port->ops = &altera_uart_ops;
423 port->private_data = platp;
424 }
425
426 return 0;
427}
428
429static void altera_uart_console_putc(struct uart_port *port, const char c) 430static void altera_uart_console_putc(struct uart_port *port, const char c)
430{ 431{
431 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & 432 while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
new file mode 100644
index 000000000000..615e46470491
--- /dev/null
+++ b/drivers/tty/serial/efm32-uart.c
@@ -0,0 +1,830 @@
1#if defined(CONFIG_SERIAL_EFM32_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
2#define SUPPORT_SYSRQ
3#endif
4
5#include <linux/kernel.h>
6#include <linux/module.h>
7#include <linux/io.h>
8#include <linux/platform_device.h>
9#include <linux/console.h>
10#include <linux/sysrq.h>
11#include <linux/serial_core.h>
12#include <linux/tty_flip.h>
13#include <linux/slab.h>
14#include <linux/clk.h>
15#include <linux/of.h>
16#include <linux/of_device.h>
17
18#include <linux/platform_data/efm32-uart.h>
19
20#define DRIVER_NAME "efm32-uart"
21#define DEV_NAME "ttyefm"
22
23#define UARTn_CTRL 0x00
24#define UARTn_CTRL_SYNC 0x0001
25#define UARTn_CTRL_TXBIL 0x1000
26
27#define UARTn_FRAME 0x04
28#define UARTn_FRAME_DATABITS__MASK 0x000f
29#define UARTn_FRAME_DATABITS(n) ((n) - 3)
30#define UARTn_FRAME_PARITY_NONE 0x0000
31#define UARTn_FRAME_PARITY_EVEN 0x0200
32#define UARTn_FRAME_PARITY_ODD 0x0300
33#define UARTn_FRAME_STOPBITS_HALF 0x0000
34#define UARTn_FRAME_STOPBITS_ONE 0x1000
35#define UARTn_FRAME_STOPBITS_TWO 0x3000
36
37#define UARTn_CMD 0x0c
38#define UARTn_CMD_RXEN 0x0001
39#define UARTn_CMD_RXDIS 0x0002
40#define UARTn_CMD_TXEN 0x0004
41#define UARTn_CMD_TXDIS 0x0008
42
43#define UARTn_STATUS 0x10
44#define UARTn_STATUS_TXENS 0x0002
45#define UARTn_STATUS_TXC 0x0020
46#define UARTn_STATUS_TXBL 0x0040
47#define UARTn_STATUS_RXDATAV 0x0080
48
49#define UARTn_CLKDIV 0x14
50
51#define UARTn_RXDATAX 0x18
52#define UARTn_RXDATAX_RXDATA__MASK 0x01ff
53#define UARTn_RXDATAX_PERR 0x4000
54#define UARTn_RXDATAX_FERR 0x8000
55/*
56 * This is a software only flag used for ignore_status_mask and
57 * read_status_mask! It's used for breaks that the hardware doesn't report
58 * explicitly.
59 */
60#define SW_UARTn_RXDATAX_BERR 0x2000
61
62#define UARTn_TXDATA 0x34
63
64#define UARTn_IF 0x40
65#define UARTn_IF_TXC 0x0001
66#define UARTn_IF_TXBL 0x0002
67#define UARTn_IF_RXDATAV 0x0004
68#define UARTn_IF_RXOF 0x0010
69
70#define UARTn_IFS 0x44
71#define UARTn_IFC 0x48
72#define UARTn_IEN 0x4c
73
74#define UARTn_ROUTE 0x54
75#define UARTn_ROUTE_LOCATION__MASK 0x0700
76#define UARTn_ROUTE_LOCATION(n) (((n) << 8) & UARTn_ROUTE_LOCATION__MASK)
77#define UARTn_ROUTE_RXPEN 0x0001
78#define UARTn_ROUTE_TXPEN 0x0002
79
80struct efm32_uart_port {
81 struct uart_port port;
82 unsigned int txirq;
83 struct clk *clk;
84};
85#define to_efm_port(_port) container_of(_port, struct efm32_uart_port, port)
86#define efm_debug(efm_port, format, arg...) \
87 dev_dbg(efm_port->port.dev, format, ##arg)
88
89static void efm32_uart_write32(struct efm32_uart_port *efm_port,
90 u32 value, unsigned offset)
91{
92 writel_relaxed(value, efm_port->port.membase + offset);
93}
94
95static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,
96 unsigned offset)
97{
98 return readl_relaxed(efm_port->port.membase + offset);
99}
100
101static unsigned int efm32_uart_tx_empty(struct uart_port *port)
102{
103 struct efm32_uart_port *efm_port = to_efm_port(port);
104 u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
105
106 if (status & UARTn_STATUS_TXC)
107 return TIOCSER_TEMT;
108 else
109 return 0;
110}
111
112static void efm32_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
113{
114 /* sorry, neither handshaking lines nor loop functionallity */
115}
116
117static unsigned int efm32_uart_get_mctrl(struct uart_port *port)
118{
119 /* sorry, no handshaking lines available */
120 return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR;
121}
122
123static void efm32_uart_stop_tx(struct uart_port *port)
124{
125 struct efm32_uart_port *efm_port = to_efm_port(port);
126 u32 ien = efm32_uart_read32(efm_port, UARTn_IEN);
127
128 efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
129 ien &= ~(UARTn_IF_TXC | UARTn_IF_TXBL);
130 efm32_uart_write32(efm_port, ien, UARTn_IEN);
131}
132
133static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)
134{
135 struct uart_port *port = &efm_port->port;
136 struct circ_buf *xmit = &port->state->xmit;
137
138 while (efm32_uart_read32(efm_port, UARTn_STATUS) &
139 UARTn_STATUS_TXBL) {
140 if (port->x_char) {
141 port->icount.tx++;
142 efm32_uart_write32(efm_port, port->x_char,
143 UARTn_TXDATA);
144 port->x_char = 0;
145 continue;
146 }
147 if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
148 port->icount.tx++;
149 efm32_uart_write32(efm_port, xmit->buf[xmit->tail],
150 UARTn_TXDATA);
151 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
152 } else
153 break;
154 }
155
156 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
157 uart_write_wakeup(port);
158
159 if (!port->x_char && uart_circ_empty(xmit) &&
160 efm32_uart_read32(efm_port, UARTn_STATUS) &
161 UARTn_STATUS_TXC)
162 efm32_uart_stop_tx(port);
163}
164
165static void efm32_uart_start_tx(struct uart_port *port)
166{
167 struct efm32_uart_port *efm_port = to_efm_port(port);
168 u32 ien;
169
170 efm32_uart_write32(efm_port,
171 UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IFC);
172 ien = efm32_uart_read32(efm_port, UARTn_IEN);
173 efm32_uart_write32(efm_port,
174 ien | UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IEN);
175 efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
176
177 efm32_uart_tx_chars(efm_port);
178}
179
180static void efm32_uart_stop_rx(struct uart_port *port)
181{
182 struct efm32_uart_port *efm_port = to_efm_port(port);
183
184 efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);
185}
186
187static void efm32_uart_enable_ms(struct uart_port *port)
188{
189 /* no handshake lines, no modem status interrupts */
190}
191
192static void efm32_uart_break_ctl(struct uart_port *port, int ctl)
193{
194 /* not possible without fiddling with gpios */
195}
196
197static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port,
198 struct tty_struct *tty)
199{
200 struct uart_port *port = &efm_port->port;
201
202 while (efm32_uart_read32(efm_port, UARTn_STATUS) &
203 UARTn_STATUS_RXDATAV) {
204 u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);
205 int flag = 0;
206
207 /*
208 * This is a reserved bit and I only saw it read as 0. But to be
209 * sure not to be confused too much by new devices adhere to the
210 * warning in the reference manual that reserverd bits might
211 * read as 1 in the future.
212 */
213 rxdata &= ~SW_UARTn_RXDATAX_BERR;
214
215 port->icount.rx++;
216
217 if ((rxdata & UARTn_RXDATAX_FERR) &&
218 !(rxdata & UARTn_RXDATAX_RXDATA__MASK)) {
219 rxdata |= SW_UARTn_RXDATAX_BERR;
220 port->icount.brk++;
221 if (uart_handle_break(port))
222 continue;
223 } else if (rxdata & UARTn_RXDATAX_PERR)
224 port->icount.parity++;
225 else if (rxdata & UARTn_RXDATAX_FERR)
226 port->icount.frame++;
227
228 rxdata &= port->read_status_mask;
229
230 if (rxdata & SW_UARTn_RXDATAX_BERR)
231 flag = TTY_BREAK;
232 else if (rxdata & UARTn_RXDATAX_PERR)
233 flag = TTY_PARITY;
234 else if (rxdata & UARTn_RXDATAX_FERR)
235 flag = TTY_FRAME;
236 else if (uart_handle_sysrq_char(port,
237 rxdata & UARTn_RXDATAX_RXDATA__MASK))
238 continue;
239
240 if (tty && (rxdata & port->ignore_status_mask) == 0)
241 tty_insert_flip_char(tty,
242 rxdata & UARTn_RXDATAX_RXDATA__MASK, flag);
243 }
244}
245
246static irqreturn_t efm32_uart_rxirq(int irq, void *data)
247{
248 struct efm32_uart_port *efm_port = data;
249 u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
250 int handled = IRQ_NONE;
251 struct uart_port *port = &efm_port->port;
252 struct tty_struct *tty;
253
254 spin_lock(&port->lock);
255
256 tty = tty_kref_get(port->state->port.tty);
257
258 if (irqflag & UARTn_IF_RXDATAV) {
259 efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);
260 efm32_uart_rx_chars(efm_port, tty);
261
262 handled = IRQ_HANDLED;
263 }
264
265 if (irqflag & UARTn_IF_RXOF) {
266 efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);
267 port->icount.overrun++;
268 if (tty)
269 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
270
271 handled = IRQ_HANDLED;
272 }
273
274 if (tty) {
275 tty_flip_buffer_push(tty);
276 tty_kref_put(tty);
277 }
278
279 spin_unlock(&port->lock);
280
281 return handled;
282}
283
284static irqreturn_t efm32_uart_txirq(int irq, void *data)
285{
286 struct efm32_uart_port *efm_port = data;
287 u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
288
289 /* TXBL doesn't need to be cleared */
290 if (irqflag & UARTn_IF_TXC)
291 efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);
292
293 if (irqflag & (UARTn_IF_TXC | UARTn_IF_TXBL)) {
294 efm32_uart_tx_chars(efm_port);
295 return IRQ_HANDLED;
296 } else
297 return IRQ_NONE;
298}
299
300static int efm32_uart_startup(struct uart_port *port)
301{
302 struct efm32_uart_port *efm_port = to_efm_port(port);
303 u32 location = 0;
304 struct efm32_uart_pdata *pdata = dev_get_platdata(port->dev);
305 int ret;
306
307 if (pdata)
308 location = UARTn_ROUTE_LOCATION(pdata->location);
309
310 ret = clk_enable(efm_port->clk);
311 if (ret) {
312 efm_debug(efm_port, "failed to enable clk\n");
313 goto err_clk_enable;
314 }
315 port->uartclk = clk_get_rate(efm_port->clk);
316
317 /* Enable pins at configured location */
318 efm32_uart_write32(efm_port, location | UARTn_ROUTE_RXPEN | UARTn_ROUTE_TXPEN,
319 UARTn_ROUTE);
320
321 ret = request_irq(port->irq, efm32_uart_rxirq, 0,
322 DRIVER_NAME, efm_port);
323 if (ret) {
324 efm_debug(efm_port, "failed to register rxirq\n");
325 goto err_request_irq_rx;
326 }
327
328 /* disable all irqs */
329 efm32_uart_write32(efm_port, 0, UARTn_IEN);
330
331 ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,
332 DRIVER_NAME, efm_port);
333 if (ret) {
334 efm_debug(efm_port, "failed to register txirq\n");
335 free_irq(port->irq, efm_port);
336err_request_irq_rx:
337
338 clk_disable(efm_port->clk);
339 } else {
340 efm32_uart_write32(efm_port,
341 UARTn_IF_RXDATAV | UARTn_IF_RXOF, UARTn_IEN);
342 efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);
343 }
344
345err_clk_enable:
346 return ret;
347}
348
349static void efm32_uart_shutdown(struct uart_port *port)
350{
351 struct efm32_uart_port *efm_port = to_efm_port(port);
352
353 efm32_uart_write32(efm_port, 0, UARTn_IEN);
354 free_irq(port->irq, efm_port);
355
356 clk_disable(efm_port->clk);
357}
358
359static void efm32_uart_set_termios(struct uart_port *port,
360 struct ktermios *new, struct ktermios *old)
361{
362 struct efm32_uart_port *efm_port = to_efm_port(port);
363 unsigned long flags;
364 unsigned baud;
365 u32 clkdiv;
366 u32 frame = 0;
367
368 /* no modem control lines */
369 new->c_cflag &= ~(CRTSCTS | CMSPAR);
370
371 baud = uart_get_baud_rate(port, new, old,
372 DIV_ROUND_CLOSEST(port->uartclk, 16 * 8192),
373 DIV_ROUND_CLOSEST(port->uartclk, 16));
374
375 switch (new->c_cflag & CSIZE) {
376 case CS5:
377 frame |= UARTn_FRAME_DATABITS(5);
378 break;
379 case CS6:
380 frame |= UARTn_FRAME_DATABITS(6);
381 break;
382 case CS7:
383 frame |= UARTn_FRAME_DATABITS(7);
384 break;
385 case CS8:
386 frame |= UARTn_FRAME_DATABITS(8);
387 break;
388 }
389
390 if (new->c_cflag & CSTOPB)
391 /* the receiver only verifies the first stop bit */
392 frame |= UARTn_FRAME_STOPBITS_TWO;
393 else
394 frame |= UARTn_FRAME_STOPBITS_ONE;
395
396 if (new->c_cflag & PARENB) {
397 if (new->c_cflag & PARODD)
398 frame |= UARTn_FRAME_PARITY_ODD;
399 else
400 frame |= UARTn_FRAME_PARITY_EVEN;
401 } else
402 frame |= UARTn_FRAME_PARITY_NONE;
403
404 /*
405 * the 6 lowest bits of CLKDIV are dc, bit 6 has value 0.25.
406 * port->uartclk <= 14e6, so 4 * port->uartclk doesn't overflow.
407 */
408 clkdiv = (DIV_ROUND_CLOSEST(4 * port->uartclk, 16 * baud) - 4) << 6;
409
410 spin_lock_irqsave(&port->lock, flags);
411
412 efm32_uart_write32(efm_port,
413 UARTn_CMD_TXDIS | UARTn_CMD_RXDIS, UARTn_CMD);
414
415 port->read_status_mask = UARTn_RXDATAX_RXDATA__MASK;
416 if (new->c_iflag & INPCK)
417 port->read_status_mask |=
418 UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
419 if (new->c_iflag & (BRKINT | PARMRK))
420 port->read_status_mask |= SW_UARTn_RXDATAX_BERR;
421
422 port->ignore_status_mask = 0;
423 if (new->c_iflag & IGNPAR)
424 port->ignore_status_mask |=
425 UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
426 if (new->c_iflag & IGNBRK)
427 port->ignore_status_mask |= SW_UARTn_RXDATAX_BERR;
428
429 uart_update_timeout(port, new->c_cflag, baud);
430
431 efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);
432 efm32_uart_write32(efm_port, frame, UARTn_FRAME);
433 efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);
434
435 efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,
436 UARTn_CMD);
437
438 spin_unlock_irqrestore(&port->lock, flags);
439}
440
441static const char *efm32_uart_type(struct uart_port *port)
442{
443 return port->type == PORT_EFMUART ? "efm32-uart" : NULL;
444}
445
446static void efm32_uart_release_port(struct uart_port *port)
447{
448 struct efm32_uart_port *efm_port = to_efm_port(port);
449
450 clk_unprepare(efm_port->clk);
451 clk_put(efm_port->clk);
452 iounmap(port->membase);
453}
454
455static int efm32_uart_request_port(struct uart_port *port)
456{
457 struct efm32_uart_port *efm_port = to_efm_port(port);
458 int ret;
459
460 port->membase = ioremap(port->mapbase, 60);
461 if (!efm_port->port.membase) {
462 ret = -ENOMEM;
463 efm_debug(efm_port, "failed to remap\n");
464 goto err_ioremap;
465 }
466
467 efm_port->clk = clk_get(port->dev, NULL);
468 if (IS_ERR(efm_port->clk)) {
469 ret = PTR_ERR(efm_port->clk);
470 efm_debug(efm_port, "failed to get clock\n");
471 goto err_clk_get;
472 }
473
474 ret = clk_prepare(efm_port->clk);
475 if (ret) {
476 clk_put(efm_port->clk);
477err_clk_get:
478
479 iounmap(port->membase);
480err_ioremap:
481 return ret;
482 }
483 return 0;
484}
485
486static void efm32_uart_config_port(struct uart_port *port, int type)
487{
488 if (type & UART_CONFIG_TYPE &&
489 !efm32_uart_request_port(port))
490 port->type = PORT_EFMUART;
491}
492
493static int efm32_uart_verify_port(struct uart_port *port,
494 struct serial_struct *serinfo)
495{
496 int ret = 0;
497
498 if (serinfo->type != PORT_UNKNOWN && serinfo->type != PORT_EFMUART)
499 ret = -EINVAL;
500
501 return ret;
502}
503
504static struct uart_ops efm32_uart_pops = {
505 .tx_empty = efm32_uart_tx_empty,
506 .set_mctrl = efm32_uart_set_mctrl,
507 .get_mctrl = efm32_uart_get_mctrl,
508 .stop_tx = efm32_uart_stop_tx,
509 .start_tx = efm32_uart_start_tx,
510 .stop_rx = efm32_uart_stop_rx,
511 .enable_ms = efm32_uart_enable_ms,
512 .break_ctl = efm32_uart_break_ctl,
513 .startup = efm32_uart_startup,
514 .shutdown = efm32_uart_shutdown,
515 .set_termios = efm32_uart_set_termios,
516 .type = efm32_uart_type,
517 .release_port = efm32_uart_release_port,
518 .request_port = efm32_uart_request_port,
519 .config_port = efm32_uart_config_port,
520 .verify_port = efm32_uart_verify_port,
521};
522
523static struct efm32_uart_port *efm32_uart_ports[5];
524
525#ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE
526static void efm32_uart_console_putchar(struct uart_port *port, int ch)
527{
528 struct efm32_uart_port *efm_port = to_efm_port(port);
529 unsigned int timeout = 0x400;
530 u32 status;
531
532 while (1) {
533 status = efm32_uart_read32(efm_port, UARTn_STATUS);
534
535 if (status & UARTn_STATUS_TXBL)
536 break;
537 if (!timeout--)
538 return;
539 }
540 efm32_uart_write32(efm_port, ch, UARTn_TXDATA);
541}
542
543static void efm32_uart_console_write(struct console *co, const char *s,
544 unsigned int count)
545{
546 struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];
547 u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
548 unsigned int timeout = 0x400;
549
550 if (!(status & UARTn_STATUS_TXENS))
551 efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
552
553 uart_console_write(&efm_port->port, s, count,
554 efm32_uart_console_putchar);
555
556 /* Wait for the transmitter to become empty */
557 while (1) {
558 u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
559 if (status & UARTn_STATUS_TXC)
560 break;
561 if (!timeout--)
562 break;
563 }
564
565 if (!(status & UARTn_STATUS_TXENS))
566 efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
567}
568
569static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,
570 int *baud, int *parity, int *bits)
571{
572 u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);
573 u32 route, clkdiv, frame;
574
575 if (ctrl & UARTn_CTRL_SYNC)
576 /* not operating in async mode */
577 return;
578
579 route = efm32_uart_read32(efm_port, UARTn_ROUTE);
580 if (!(route & UARTn_ROUTE_TXPEN))
581 /* tx pin not routed */
582 return;
583
584 clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);
585
586 *baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,
587 16 * (4 + (clkdiv >> 6)));
588
589 frame = efm32_uart_read32(efm_port, UARTn_FRAME);
590 if (frame & UARTn_FRAME_PARITY_ODD)
591 *parity = 'o';
592 else if (frame & UARTn_FRAME_PARITY_EVEN)
593 *parity = 'e';
594 else
595 *parity = 'n';
596
597 *bits = (frame & UARTn_FRAME_DATABITS__MASK) -
598 UARTn_FRAME_DATABITS(4) + 4;
599
600 efm_debug(efm_port, "get_opts: options=%d%c%d\n",
601 *baud, *parity, *bits);
602}
603
604static int efm32_uart_console_setup(struct console *co, char *options)
605{
606 struct efm32_uart_port *efm_port;
607 int baud = 115200;
608 int bits = 8;
609 int parity = 'n';
610 int flow = 'n';
611 int ret;
612
613 if (co->index < 0 || co->index >= ARRAY_SIZE(efm32_uart_ports)) {
614 unsigned i;
615 for (i = 0; i < ARRAY_SIZE(efm32_uart_ports); ++i) {
616 if (efm32_uart_ports[i]) {
617 pr_warn("efm32-console: fall back to console index %u (from %hhi)\n",
618 i, co->index);
619 co->index = i;
620 break;
621 }
622 }
623 }
624
625 efm_port = efm32_uart_ports[co->index];
626 if (!efm_port) {
627 pr_warn("efm32-console: No port at %d\n", co->index);
628 return -ENODEV;
629 }
630
631 ret = clk_prepare(efm_port->clk);
632 if (ret) {
633 dev_warn(efm_port->port.dev,
634 "console: clk_prepare failed: %d\n", ret);
635 return ret;
636 }
637
638 efm_port->port.uartclk = clk_get_rate(efm_port->clk);
639
640 if (options)
641 uart_parse_options(options, &baud, &parity, &bits, &flow);
642 else
643 efm32_uart_console_get_options(efm_port,
644 &baud, &parity, &bits);
645
646 return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);
647}
648
649static struct uart_driver efm32_uart_reg;
650
651static struct console efm32_uart_console = {
652 .name = DEV_NAME,
653 .write = efm32_uart_console_write,
654 .device = uart_console_device,
655 .setup = efm32_uart_console_setup,
656 .flags = CON_PRINTBUFFER,
657 .index = -1,
658 .data = &efm32_uart_reg,
659};
660
661#else
662#define efm32_uart_console (*(struct console *)NULL)
663#endif /* ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE / else */
664
665static struct uart_driver efm32_uart_reg = {
666 .owner = THIS_MODULE,
667 .driver_name = DRIVER_NAME,
668 .dev_name = DEV_NAME,
669 .nr = ARRAY_SIZE(efm32_uart_ports),
670 .cons = &efm32_uart_console,
671};
672
673static int efm32_uart_probe_dt(struct platform_device *pdev,
674 struct efm32_uart_port *efm_port)
675{
676 struct device_node *np = pdev->dev.of_node;
677 int ret;
678
679 if (!np)
680 return 1;
681
682 ret = of_alias_get_id(np, "serial");
683 if (ret < 0) {
684 dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
685 return ret;
686 } else {
687 efm_port->port.line = ret;
688 return 0;
689 }
690
691}
692
693static int __devinit efm32_uart_probe(struct platform_device *pdev)
694{
695 struct efm32_uart_port *efm_port;
696 struct resource *res;
697 int ret;
698
699 efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);
700 if (!efm_port) {
701 dev_dbg(&pdev->dev, "failed to allocate private data\n");
702 return -ENOMEM;
703 }
704
705 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
706 if (!res) {
707 ret = -ENODEV;
708 dev_dbg(&pdev->dev, "failed to determine base address\n");
709 goto err_get_base;
710 }
711
712 if (resource_size(res) < 60) {
713 ret = -EINVAL;
714 dev_dbg(&pdev->dev, "memory resource too small\n");
715 goto err_too_small;
716 }
717
718 ret = platform_get_irq(pdev, 0);
719 if (ret <= 0) {
720 dev_dbg(&pdev->dev, "failed to get rx irq\n");
721 goto err_get_rxirq;
722 }
723
724 efm_port->port.irq = ret;
725
726 ret = platform_get_irq(pdev, 1);
727 if (ret <= 0)
728 ret = efm_port->port.irq + 1;
729
730 efm_port->txirq = ret;
731
732 efm_port->port.dev = &pdev->dev;
733 efm_port->port.mapbase = res->start;
734 efm_port->port.type = PORT_EFMUART;
735 efm_port->port.iotype = UPIO_MEM32;
736 efm_port->port.fifosize = 2;
737 efm_port->port.ops = &efm32_uart_pops;
738 efm_port->port.flags = UPF_BOOT_AUTOCONF;
739
740 ret = efm32_uart_probe_dt(pdev, efm_port);
741 if (ret > 0)
742 /* not created by device tree */
743 efm_port->port.line = pdev->id;
744
745 if (efm_port->port.line >= 0 &&
746 efm_port->port.line < ARRAY_SIZE(efm32_uart_ports))
747 efm32_uart_ports[efm_port->port.line] = efm_port;
748
749 ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);
750 if (ret) {
751 dev_dbg(&pdev->dev, "failed to add port: %d\n", ret);
752
753 if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports))
754 efm32_uart_ports[pdev->id] = NULL;
755err_get_rxirq:
756err_too_small:
757err_get_base:
758 kfree(efm_port);
759 } else {
760 platform_set_drvdata(pdev, efm_port);
761 dev_dbg(&pdev->dev, "\\o/\n");
762 }
763
764 return ret;
765}
766
767static int __devexit efm32_uart_remove(struct platform_device *pdev)
768{
769 struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);
770
771 platform_set_drvdata(pdev, NULL);
772
773 uart_remove_one_port(&efm32_uart_reg, &efm_port->port);
774
775 if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports))
776 efm32_uart_ports[pdev->id] = NULL;
777
778 kfree(efm_port);
779
780 return 0;
781}
782
783static struct of_device_id efm32_uart_dt_ids[] = {
784 {
785 .compatible = "efm32,uart",
786 }, {
787 /* sentinel */
788 }
789};
790MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids);
791
792static struct platform_driver efm32_uart_driver = {
793 .probe = efm32_uart_probe,
794 .remove = __devexit_p(efm32_uart_remove),
795
796 .driver = {
797 .name = DRIVER_NAME,
798 .owner = THIS_MODULE,
799 .of_match_table = efm32_uart_dt_ids,
800 },
801};
802
803static int __init efm32_uart_init(void)
804{
805 int ret;
806
807 ret = uart_register_driver(&efm32_uart_reg);
808 if (ret)
809 return ret;
810
811 ret = platform_driver_register(&efm32_uart_driver);
812 if (ret)
813 uart_unregister_driver(&efm32_uart_reg);
814
815 pr_info("EFM32 UART/USART driver\n");
816
817 return ret;
818}
819module_init(efm32_uart_init);
820
821static void __exit efm32_uart_exit(void)
822{
823 platform_driver_unregister(&efm32_uart_driver);
824 uart_unregister_driver(&efm32_uart_reg);
825}
826
827MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
828MODULE_DESCRIPTION("EFM32 UART/USART driver");
829MODULE_LICENSE("GPL v2");
830MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c
index 94a6792bf97b..e465dda63edf 100644
--- a/drivers/tty/serial/m32r_sio.c
+++ b/drivers/tty/serial/m32r_sio.c
@@ -70,13 +70,6 @@
70 70
71#define PASS_LIMIT 256 71#define PASS_LIMIT 256
72 72
73/*
74 * We default to IRQ0 for the "no irq" hack. Some
75 * machine types want others as well - they're free
76 * to redefine this in their header file.
77 */
78#define is_real_interrupt(irq) ((irq) != 0)
79
80#define BASE_BAUD 115200 73#define BASE_BAUD 115200
81 74
82/* Standard COM flags */ 75/* Standard COM flags */
@@ -640,7 +633,7 @@ static int m32r_sio_startup(struct uart_port *port)
640 * hardware interrupt, we use a timer-based system. The original 633 * hardware interrupt, we use a timer-based system. The original
641 * driver used to do this with IRQ0. 634 * driver used to do this with IRQ0.
642 */ 635 */
643 if (!is_real_interrupt(up->port.irq)) { 636 if (!up->port.irq) {
644 unsigned int timeout = up->port.timeout; 637 unsigned int timeout = up->port.timeout;
645 638
646 timeout = timeout > 6 ? (timeout / 2 - 2) : 1; 639 timeout = timeout > 6 ? (timeout / 2 - 2) : 1;
@@ -687,7 +680,7 @@ static void m32r_sio_shutdown(struct uart_port *port)
687 680
688 sio_init(); 681 sio_init();
689 682
690 if (!is_real_interrupt(up->port.irq)) 683 if (!up->port.irq)
691 del_timer_sync(&up->timer); 684 del_timer_sync(&up->timer);
692 else 685 else
693 serial_unlink_irq_chain(up); 686 serial_unlink_irq_chain(up);
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index 1093a88a1fe3..e9a770d77a6e 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -507,7 +507,7 @@ static int __init mpc512x_psc_fifoc_init(void)
507 507
508 psc_fifoc_irq = irq_of_parse_and_map(np, 0); 508 psc_fifoc_irq = irq_of_parse_and_map(np, 0);
509 of_node_put(np); 509 of_node_put(np);
510 if (psc_fifoc_irq == NO_IRQ) { 510 if (psc_fifoc_irq == 0) {
511 pr_err("%s: Can't get FIFOC irq\n", __func__); 511 pr_err("%s: Can't get FIFOC irq\n", __func__);
512 iounmap(psc_fifoc); 512 iounmap(psc_fifoc);
513 return -ENODEV; 513 return -ENODEV;
@@ -1354,7 +1354,7 @@ static int __devinit mpc52xx_uart_of_probe(struct platform_device *op)
1354 } 1354 }
1355 1355
1356 psc_ops->get_irq(port, op->dev.of_node); 1356 psc_ops->get_irq(port, op->dev.of_node);
1357 if (port->irq == NO_IRQ) { 1357 if (port->irq == 0) {
1358 dev_dbg(&op->dev, "Could not get irq\n"); 1358 dev_dbg(&op->dev, "Could not get irq\n");
1359 return -EINVAL; 1359 return -EINVAL;
1360 } 1360 }
diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index 06f6aefd5ba6..c61d950e07c1 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -499,7 +499,7 @@ static int __init mux_probe(struct parisc_device *dev)
499 port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET); 499 port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET);
500 port->iotype = UPIO_MEM; 500 port->iotype = UPIO_MEM;
501 port->type = PORT_MUX; 501 port->type = PORT_MUX;
502 port->irq = NO_IRQ; 502 port->irq = 0;
503 port->uartclk = 0; 503 port->uartclk = 0;
504 port->fifosize = MUX_FIFO_SIZE; 504 port->fifosize = MUX_FIFO_SIZE;
505 port->ops = &mux_pops; 505 port->ops = &mux_pops;
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 17ae65762d1a..aa4d07b4a9d5 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -29,6 +29,7 @@
29#include <linux/nmi.h> 29#include <linux/nmi.h>
30#include <linux/delay.h> 30#include <linux/delay.h>
31 31
32#include <linux/debugfs.h>
32#include <linux/dmaengine.h> 33#include <linux/dmaengine.h>
33#include <linux/pch_dma.h> 34#include <linux/pch_dma.h>
34 35
@@ -144,6 +145,8 @@ enum {
144#define PCH_UART_DLL 0x00 145#define PCH_UART_DLL 0x00
145#define PCH_UART_DLM 0x01 146#define PCH_UART_DLM 0x01
146 147
148#define PCH_UART_BRCSR 0x0E
149
147#define PCH_UART_IID_RLS (PCH_UART_IIR_REI) 150#define PCH_UART_IID_RLS (PCH_UART_IIR_REI)
148#define PCH_UART_IID_RDR (PCH_UART_IIR_RRI) 151#define PCH_UART_IID_RDR (PCH_UART_IIR_RRI)
149#define PCH_UART_IID_RDR_TO (PCH_UART_IIR_RRI | PCH_UART_IIR_TOI) 152#define PCH_UART_IID_RDR_TO (PCH_UART_IIR_RRI | PCH_UART_IIR_TOI)
@@ -243,6 +246,8 @@ struct eg20t_port {
243 int tx_dma_use; 246 int tx_dma_use;
244 void *rx_buf_virt; 247 void *rx_buf_virt;
245 dma_addr_t rx_buf_dma; 248 dma_addr_t rx_buf_dma;
249
250 struct dentry *debugfs;
246}; 251};
247 252
248/** 253/**
@@ -292,23 +297,73 @@ static const int trigger_level_64[4] = { 1, 16, 32, 56 };
292static const int trigger_level_16[4] = { 1, 4, 8, 14 }; 297static const int trigger_level_16[4] = { 1, 4, 8, 14 };
293static const int trigger_level_1[4] = { 1, 1, 1, 1 }; 298static const int trigger_level_1[4] = { 1, 1, 1, 1 };
294 299
295static void pch_uart_hal_request(struct pci_dev *pdev, int fifosize, 300#ifdef CONFIG_DEBUG_FS
296 int base_baud)
297{
298 struct eg20t_port *priv = pci_get_drvdata(pdev);
299 301
300 priv->trigger_level = 1; 302#define PCH_REGS_BUFSIZE 1024
301 priv->fcr = 0; 303static int pch_show_regs_open(struct inode *inode, struct file *file)
304{
305 file->private_data = inode->i_private;
306 return 0;
302} 307}
303 308
304static unsigned int get_msr(struct eg20t_port *priv, void __iomem *base) 309static ssize_t port_show_regs(struct file *file, char __user *user_buf,
310 size_t count, loff_t *ppos)
305{ 311{
306 unsigned int msr = ioread8(base + UART_MSR); 312 struct eg20t_port *priv = file->private_data;
307 priv->dmsr |= msr & PCH_UART_MSR_DELTA; 313 char *buf;
314 u32 len = 0;
315 ssize_t ret;
316 unsigned char lcr;
317
318 buf = kzalloc(PCH_REGS_BUFSIZE, GFP_KERNEL);
319 if (!buf)
320 return 0;
321
322 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
323 "PCH EG20T port[%d] regs:\n", priv->port.line);
324
325 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
326 "=================================\n");
327 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
328 "IER: \t0x%02x\n", ioread8(priv->membase + UART_IER));
329 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
330 "IIR: \t0x%02x\n", ioread8(priv->membase + UART_IIR));
331 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
332 "LCR: \t0x%02x\n", ioread8(priv->membase + UART_LCR));
333 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
334 "MCR: \t0x%02x\n", ioread8(priv->membase + UART_MCR));
335 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
336 "LSR: \t0x%02x\n", ioread8(priv->membase + UART_LSR));
337 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
338 "MSR: \t0x%02x\n", ioread8(priv->membase + UART_MSR));
339 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
340 "BRCSR: \t0x%02x\n",
341 ioread8(priv->membase + PCH_UART_BRCSR));
308 342
309 return msr; 343 lcr = ioread8(priv->membase + UART_LCR);
344 iowrite8(PCH_UART_LCR_DLAB, priv->membase + UART_LCR);
345 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
346 "DLL: \t0x%02x\n", ioread8(priv->membase + UART_DLL));
347 len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
348 "DLM: \t0x%02x\n", ioread8(priv->membase + UART_DLM));
349 iowrite8(lcr, priv->membase + UART_LCR);
350
351 if (len > PCH_REGS_BUFSIZE)
352 len = PCH_REGS_BUFSIZE;
353
354 ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
355 kfree(buf);
356 return ret;
310} 357}
311 358
359static const struct file_operations port_regs_ops = {
360 .owner = THIS_MODULE,
361 .open = pch_show_regs_open,
362 .read = port_show_regs,
363 .llseek = default_llseek,
364};
365#endif /* CONFIG_DEBUG_FS */
366
312static void pch_uart_hal_enable_interrupt(struct eg20t_port *priv, 367static void pch_uart_hal_enable_interrupt(struct eg20t_port *priv,
313 unsigned int flag) 368 unsigned int flag)
314{ 369{
@@ -442,8 +497,9 @@ static int pch_uart_hal_set_fifo(struct eg20t_port *priv,
442 497
443static u8 pch_uart_hal_get_modem(struct eg20t_port *priv) 498static u8 pch_uart_hal_get_modem(struct eg20t_port *priv)
444{ 499{
445 priv->dmsr = 0; 500 unsigned int msr = ioread8(priv->membase + UART_MSR);
446 return get_msr(priv, priv->membase); 501 priv->dmsr = msr & PCH_UART_MSR_DELTA;
502 return (u8)msr;
447} 503}
448 504
449static void pch_uart_hal_write(struct eg20t_port *priv, 505static void pch_uart_hal_write(struct eg20t_port *priv,
@@ -524,7 +580,7 @@ static int push_rx(struct eg20t_port *priv, const unsigned char *buf,
524 580
525static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf) 581static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf)
526{ 582{
527 int ret; 583 int ret = 0;
528 struct uart_port *port = &priv->port; 584 struct uart_port *port = &priv->port;
529 585
530 if (port->x_char) { 586 if (port->x_char) {
@@ -533,8 +589,6 @@ static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf)
533 buf[0] = port->x_char; 589 buf[0] = port->x_char;
534 port->x_char = 0; 590 port->x_char = 0;
535 ret = 1; 591 ret = 1;
536 } else {
537 ret = 0;
538 } 592 }
539 593
540 return ret; 594 return ret;
@@ -1032,14 +1086,12 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
1032static unsigned int pch_uart_tx_empty(struct uart_port *port) 1086static unsigned int pch_uart_tx_empty(struct uart_port *port)
1033{ 1087{
1034 struct eg20t_port *priv; 1088 struct eg20t_port *priv;
1035 int ret; 1089
1036 priv = container_of(port, struct eg20t_port, port); 1090 priv = container_of(port, struct eg20t_port, port);
1037 if (priv->tx_empty) 1091 if (priv->tx_empty)
1038 ret = TIOCSER_TEMT; 1092 return TIOCSER_TEMT;
1039 else 1093 else
1040 ret = 0; 1094 return 0;
1041
1042 return ret;
1043} 1095}
1044 1096
1045/* Returns the current state of modem control inputs. */ 1097/* Returns the current state of modem control inputs. */
@@ -1273,9 +1325,8 @@ static void pch_uart_set_termios(struct uart_port *port,
1273 else 1325 else
1274 parity = PCH_UART_HAL_PARITY_EVEN; 1326 parity = PCH_UART_HAL_PARITY_EVEN;
1275 1327
1276 } else { 1328 } else
1277 parity = PCH_UART_HAL_PARITY_NONE; 1329 parity = PCH_UART_HAL_PARITY_NONE;
1278 }
1279 1330
1280 /* Only UART0 has auto hardware flow function */ 1331 /* Only UART0 has auto hardware flow function */
1281 if ((termios->c_cflag & CRTSCTS) && (priv->fifo_size == 256)) 1332 if ((termios->c_cflag & CRTSCTS) && (priv->fifo_size == 256))
@@ -1447,7 +1498,6 @@ static void
1447pch_console_write(struct console *co, const char *s, unsigned int count) 1498pch_console_write(struct console *co, const char *s, unsigned int count)
1448{ 1499{
1449 struct eg20t_port *priv; 1500 struct eg20t_port *priv;
1450
1451 unsigned long flags; 1501 unsigned long flags;
1452 u8 ier; 1502 u8 ier;
1453 int locked = 1; 1503 int locked = 1;
@@ -1554,6 +1604,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
1554 int port_type; 1604 int port_type;
1555 struct pch_uart_driver_data *board; 1605 struct pch_uart_driver_data *board;
1556 const char *board_name; 1606 const char *board_name;
1607 char name[32]; /* for debugfs file name */
1557 1608
1558 board = &drv_dat[id->driver_data]; 1609 board = &drv_dat[id->driver_data];
1559 port_type = board->port_type; 1610 port_type = board->port_type;
@@ -1614,7 +1665,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
1614 spin_lock_init(&priv->port.lock); 1665 spin_lock_init(&priv->port.lock);
1615 1666
1616 pci_set_drvdata(pdev, priv); 1667 pci_set_drvdata(pdev, priv);
1617 pch_uart_hal_request(pdev, fifosize, base_baud); 1668 priv->trigger_level = 1;
1669 priv->fcr = 0;
1618 1670
1619#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE 1671#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
1620 pch_uart_ports[board->line_no] = priv; 1672 pch_uart_ports[board->line_no] = priv;
@@ -1623,6 +1675,12 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
1623 if (ret < 0) 1675 if (ret < 0)
1624 goto init_port_hal_free; 1676 goto init_port_hal_free;
1625 1677
1678#ifdef CONFIG_DEBUG_FS
1679 snprintf(name, sizeof(name), "uart%d_regs", board->line_no);
1680 priv->debugfs = debugfs_create_file(name, S_IFREG | S_IRUGO,
1681 NULL, priv, &port_regs_ops);
1682#endif
1683
1626 return priv; 1684 return priv;
1627 1685
1628init_port_hal_free: 1686init_port_hal_free:
@@ -1639,6 +1697,11 @@ init_port_alloc_err:
1639 1697
1640static void pch_uart_exit_port(struct eg20t_port *priv) 1698static void pch_uart_exit_port(struct eg20t_port *priv)
1641{ 1699{
1700
1701#ifdef CONFIG_DEBUG_FS
1702 if (priv->debugfs)
1703 debugfs_remove(priv->debugfs);
1704#endif
1642 uart_remove_one_port(&pch_uart_driver, &priv->port); 1705 uart_remove_one_port(&pch_uart_driver, &priv->port);
1643 pci_set_drvdata(priv->pdev, NULL); 1706 pci_set_drvdata(priv->pdev, NULL);
1644 free_page((unsigned long)priv->rxbuf.buf); 1707 free_page((unsigned long)priv->rxbuf.buf);
@@ -1646,9 +1709,7 @@ static void pch_uart_exit_port(struct eg20t_port *priv)
1646 1709
1647static void pch_uart_pci_remove(struct pci_dev *pdev) 1710static void pch_uart_pci_remove(struct pci_dev *pdev)
1648{ 1711{
1649 struct eg20t_port *priv; 1712 struct eg20t_port *priv = pci_get_drvdata(pdev);
1650
1651 priv = (struct eg20t_port *)pci_get_drvdata(pdev);
1652 1713
1653 pci_disable_msi(pdev); 1714 pci_disable_msi(pdev);
1654 1715
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index e9c2dfe471a2..08ebe901bb59 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1506,7 +1506,7 @@ no_dma:
1506 * fixed up interrupt info, but we use the device-tree directly 1506 * fixed up interrupt info, but we use the device-tree directly
1507 * here due to early probing so we need the fixup too. 1507 * here due to early probing so we need the fixup too.
1508 */ 1508 */
1509 if (uap->port.irq == NO_IRQ && 1509 if (uap->port.irq == 0 &&
1510 np->parent && np->parent->parent && 1510 np->parent && np->parent->parent &&
1511 of_device_is_compatible(np->parent->parent, "gatwick")) { 1511 of_device_is_compatible(np->parent->parent, "gatwick")) {
1512 /* IRQs on gatwick are offset by 64 */ 1512 /* IRQs on gatwick are offset by 64 */
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index 8e916e76b7b5..5a47d1b196d8 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -1397,7 +1397,7 @@ static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up)
1397#endif 1397#endif
1398} 1398}
1399 1399
1400static int zilog_irq = -1; 1400static int zilog_irq;
1401 1401
1402static int __devinit zs_probe(struct platform_device *op) 1402static int __devinit zs_probe(struct platform_device *op)
1403{ 1403{
@@ -1425,7 +1425,7 @@ static int __devinit zs_probe(struct platform_device *op)
1425 1425
1426 rp = sunzilog_chip_regs[inst]; 1426 rp = sunzilog_chip_regs[inst];
1427 1427
1428 if (zilog_irq == -1) 1428 if (!zilog_irq)
1429 zilog_irq = op->archdata.irqs[0]; 1429 zilog_irq = op->archdata.irqs[0];
1430 1430
1431 up = &sunzilog_port_table[inst * 2]; 1431 up = &sunzilog_port_table[inst * 2];
@@ -1580,7 +1580,7 @@ static int __init sunzilog_init(void)
1580 if (err) 1580 if (err)
1581 goto out_unregister_uart; 1581 goto out_unregister_uart;
1582 1582
1583 if (zilog_irq != -1) { 1583 if (!zilog_irq) {
1584 struct uart_sunzilog_port *up = sunzilog_irq_chain; 1584 struct uart_sunzilog_port *up = sunzilog_irq_chain;
1585 err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, 1585 err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED,
1586 "zs", sunzilog_irq_chain); 1586 "zs", sunzilog_irq_chain);
@@ -1621,7 +1621,7 @@ static void __exit sunzilog_exit(void)
1621{ 1621{
1622 platform_driver_unregister(&zs_driver); 1622 platform_driver_unregister(&zs_driver);
1623 1623
1624 if (zilog_irq != -1) { 1624 if (!zilog_irq) {
1625 struct uart_sunzilog_port *up = sunzilog_irq_chain; 1625 struct uart_sunzilog_port *up = sunzilog_irq_chain;
1626 1626
1627 /* Disable Interrupts */ 1627 /* Disable Interrupts */
@@ -1637,7 +1637,7 @@ static void __exit sunzilog_exit(void)
1637 } 1637 }
1638 1638
1639 free_irq(zilog_irq, sunzilog_irq_chain); 1639 free_irq(zilog_irq, sunzilog_irq_chain);
1640 zilog_irq = -1; 1640 zilog_irq = 0;
1641 } 1641 }
1642 1642
1643 if (sunzilog_reg.nr) { 1643 if (sunzilog_reg.nr) {
diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c
index 2ebe606a2db1..f99b0c965f85 100644
--- a/drivers/tty/serial/ucc_uart.c
+++ b/drivers/tty/serial/ucc_uart.c
@@ -1360,7 +1360,7 @@ static int ucc_uart_probe(struct platform_device *ofdev)
1360 } 1360 }
1361 1361
1362 qe_port->port.irq = irq_of_parse_and_map(np, 0); 1362 qe_port->port.irq = irq_of_parse_and_map(np, 0);
1363 if (qe_port->port.irq == NO_IRQ) { 1363 if (qe_port->port.irq == 0) {
1364 dev_err(&ofdev->dev, "could not map IRQ for UCC%u\n", 1364 dev_err(&ofdev->dev, "could not map IRQ for UCC%u\n",
1365 qe_port->ucc_num + 1); 1365 qe_port->ucc_num + 1);
1366 ret = -EINVAL; 1366 ret = -EINVAL;
diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c
index 83148e79ca13..cf0d9485ec08 100644
--- a/drivers/tty/serial/vr41xx_siu.c
+++ b/drivers/tty/serial/vr41xx_siu.c
@@ -61,7 +61,7 @@
61static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = { 61static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = {
62 [0 ... SIU_PORTS_MAX-1] = { 62 [0 ... SIU_PORTS_MAX-1] = {
63 .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock), 63 .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock),
64 .irq = -1, 64 .irq = 0,
65 }, 65 },
66}; 66};
67 67
@@ -171,7 +171,7 @@ static inline unsigned int siu_check_type(struct uart_port *port)
171{ 171{
172 if (port->line == 0) 172 if (port->line == 0)
173 return PORT_VR41XX_SIU; 173 return PORT_VR41XX_SIU;
174 if (port->line == 1 && port->irq != -1) 174 if (port->line == 1 && port->irq)
175 return PORT_VR41XX_DSIU; 175 return PORT_VR41XX_DSIU;
176 176
177 return PORT_UNKNOWN; 177 return PORT_UNKNOWN;
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 7867b7c4538e..8db9125133b8 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -322,11 +322,16 @@ static void send_sig_all(int sig)
322{ 322{
323 struct task_struct *p; 323 struct task_struct *p;
324 324
325 read_lock(&tasklist_lock);
325 for_each_process(p) { 326 for_each_process(p) {
326 if (p->mm && !is_global_init(p)) 327 if (p->flags & PF_KTHREAD)
327 /* Not swapper, init nor kernel thread */ 328 continue;
328 force_sig(sig, p); 329 if (is_global_init(p))
330 continue;
331
332 force_sig(sig, p);
329 } 333 }
334 read_unlock(&tasklist_lock);
330} 335}
331 336
332static void sysrq_handle_term(int key) 337static void sysrq_handle_term(int key)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index e41b9bbc107d..ea7ebe22a16c 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1271,6 +1271,19 @@ int tty_init_termios(struct tty_struct *tty)
1271} 1271}
1272EXPORT_SYMBOL_GPL(tty_init_termios); 1272EXPORT_SYMBOL_GPL(tty_init_termios);
1273 1273
1274int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)
1275{
1276 int ret = tty_init_termios(tty);
1277 if (ret)
1278 return ret;
1279
1280 tty_driver_kref_get(driver);
1281 tty->count++;
1282 driver->ttys[tty->index] = tty;
1283 return 0;
1284}
1285EXPORT_SYMBOL_GPL(tty_standard_install);
1286
1274/** 1287/**
1275 * tty_driver_install_tty() - install a tty entry in the driver 1288 * tty_driver_install_tty() - install a tty entry in the driver
1276 * @driver: the driver for the tty 1289 * @driver: the driver for the tty
@@ -1286,21 +1299,8 @@ EXPORT_SYMBOL_GPL(tty_init_termios);
1286static int tty_driver_install_tty(struct tty_driver *driver, 1299static int tty_driver_install_tty(struct tty_driver *driver,
1287 struct tty_struct *tty) 1300 struct tty_struct *tty)
1288{ 1301{
1289 int idx = tty->index; 1302 return driver->ops->install ? driver->ops->install(driver, tty) :
1290 int ret; 1303 tty_standard_install(driver, tty);
1291
1292 if (driver->ops->install) {
1293 ret = driver->ops->install(driver, tty);
1294 return ret;
1295 }
1296
1297 if (tty_init_termios(tty) == 0) {
1298 tty_driver_kref_get(driver);
1299 tty->count++;
1300 driver->ttys[idx] = tty;
1301 return 0;
1302 }
1303 return -ENOMEM;
1304} 1304}
1305 1305
1306/** 1306/**
@@ -1365,7 +1365,6 @@ static int tty_reopen(struct tty_struct *tty)
1365 * @driver: tty driver we are opening a device on 1365 * @driver: tty driver we are opening a device on
1366 * @idx: device index 1366 * @idx: device index
1367 * @ret_tty: returned tty structure 1367 * @ret_tty: returned tty structure
1368 * @first_ok: ok to open a new device (used by ptmx)
1369 * 1368 *
1370 * Prepare a tty device. This may not be a "new" clean device but 1369 * Prepare a tty device. This may not be a "new" clean device but
1371 * could also be an active device. The pty drivers require special 1370 * could also be an active device. The pty drivers require special
@@ -1385,18 +1384,11 @@ static int tty_reopen(struct tty_struct *tty)
1385 * relaxed for the (most common) case of reopening a tty. 1384 * relaxed for the (most common) case of reopening a tty.
1386 */ 1385 */
1387 1386
1388struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx, 1387struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)
1389 int first_ok)
1390{ 1388{
1391 struct tty_struct *tty; 1389 struct tty_struct *tty;
1392 int retval; 1390 int retval;
1393 1391
1394 /* Check if pty master is being opened multiple times */
1395 if (driver->subtype == PTY_TYPE_MASTER &&
1396 (driver->flags & TTY_DRIVER_DEVPTS_MEM) && !first_ok) {
1397 return ERR_PTR(-EIO);
1398 }
1399
1400 /* 1392 /*
1401 * First time open is complex, especially for PTY devices. 1393 * First time open is complex, especially for PTY devices.
1402 * This code guarantees that either everything succeeds and the 1394 * This code guarantees that either everything succeeds and the
@@ -1797,11 +1789,11 @@ int tty_release(struct inode *inode, struct file *filp)
1797 * the slots and preserving the termios structure. 1789 * the slots and preserving the termios structure.
1798 */ 1790 */
1799 release_tty(tty, idx); 1791 release_tty(tty, idx);
1792 tty_unlock();
1800 1793
1801 /* Make this pty number available for reallocation */ 1794 /* Make this pty number available for reallocation */
1802 if (devpts) 1795 if (devpts)
1803 devpts_kill_index(inode, idx); 1796 devpts_kill_index(inode, idx);
1804 tty_unlock();
1805 return 0; 1797 return 0;
1806} 1798}
1807 1799
@@ -1950,7 +1942,7 @@ retry_open:
1950 if (retval) 1942 if (retval)
1951 tty = ERR_PTR(retval); 1943 tty = ERR_PTR(retval);
1952 } else 1944 } else
1953 tty = tty_init_dev(driver, index, 0); 1945 tty = tty_init_dev(driver, index);
1954 1946
1955 mutex_unlock(&tty_mutex); 1947 mutex_unlock(&tty_mutex);
1956 if (driver) 1948 if (driver)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 611b206591cb..1e30cc92719c 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -214,15 +214,14 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
214 if (!try_module_get(serial->type->driver.owner)) 214 if (!try_module_get(serial->type->driver.owner))
215 goto error_module_get; 215 goto error_module_get;
216 216
217 /* perform the standard setup */
218 retval = tty_init_termios(tty);
219 if (retval)
220 goto error_init_termios;
221
222 retval = usb_autopm_get_interface(serial->interface); 217 retval = usb_autopm_get_interface(serial->interface);
223 if (retval) 218 if (retval)
224 goto error_get_interface; 219 goto error_get_interface;
225 220
221 retval = tty_standard_install(driver, tty);
222 if (retval)
223 goto error_init_termios;
224
226 mutex_unlock(&serial->disc_mutex); 225 mutex_unlock(&serial->disc_mutex);
227 226
228 /* allow the driver to update the settings */ 227 /* allow the driver to update the settings */
@@ -231,14 +230,11 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
231 230
232 tty->driver_data = port; 231 tty->driver_data = port;
233 232
234 /* Final install (we use the default method) */
235 tty_driver_kref_get(driver);
236 tty->count++;
237 driver->ttys[idx] = tty;
238 return retval; 233 return retval;
239 234
240 error_get_interface:
241 error_init_termios: 235 error_init_termios:
236 usb_autopm_put_interface(serial->interface);
237 error_get_interface:
242 module_put(serial->type->driver.owner); 238 module_put(serial->type->driver.owner);
243 error_module_get: 239 error_module_get:
244 error_no_port: 240 error_no_port:
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 02:33:34 -0500