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-rw-r--r--drivers/tty/cyclades.c2
-rw-r--r--drivers/tty/hvc/hvc_xen.c5
-rw-r--r--drivers/tty/isicom.c2
-rw-r--r--drivers/tty/serial/8250/8250.h1
-rw-r--r--drivers/tty/serial/8250/8250_dwlib.c128
-rw-r--r--drivers/tty/serial/8250/8250_dwlib.h19
-rw-r--r--drivers/tty/serial/8250/8250_early.c1
-rw-r--r--drivers/tty/serial/8250/8250_pci.c141
-rw-r--r--drivers/tty/serial/8250/8250_port.c17
-rw-r--r--drivers/tty/serial/8250/Kconfig3
-rw-r--r--drivers/tty/serial/8250/Makefile1
-rw-r--r--drivers/tty/serial/atmel_serial.c4
-rw-r--r--drivers/tty/serial/cpm_uart/cpm_uart_core.c13
-rw-r--r--drivers/tty/serial/fsl_lpuart.c2
-rw-r--r--drivers/tty/serial/meson_uart.c44
-rw-r--r--drivers/tty/serial/samsung.c14
-rw-r--r--drivers/tty/serial/sc16is7xx.c30
-rw-r--r--drivers/tty/serial/serial-tegra.c6
-rw-r--r--drivers/tty/tty_jobctrl.c17
-rw-r--r--drivers/tty/vcc.c16
20 files changed, 397 insertions, 69 deletions
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index db048dbe9..6fec20c01 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -3648,7 +3648,7 @@ static int cy_pci_probe(struct pci_dev *pdev,
struct cyclades_card *card;
void __iomem *addr0 = NULL, *addr2 = NULL;
char *card_name = NULL;
- u32 uninitialized_var(mailbox);
+ u32 mailbox;
unsigned int device_id, nchan = 0, card_no, i, j;
unsigned char plx_ver;
int retval, irq;
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 59d85bdd1..c89f93ff0 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -587,7 +587,7 @@ static int __init xen_hvc_init(void)
ops = &dom0_hvc_ops;
r = xen_initial_domain_console_init();
if (r < 0)
- return r;
+ goto register_fe;
info = vtermno_to_xencons(HVC_COOKIE);
} else {
ops = &domU_hvc_ops;
@@ -596,7 +596,7 @@ static int __init xen_hvc_init(void)
else
r = xen_pv_console_init();
if (r < 0)
- return r;
+ goto register_fe;
info = vtermno_to_xencons(HVC_COOKIE);
info->irq = bind_evtchn_to_irq_lateeoi(info->evtchn);
@@ -621,6 +621,7 @@ static int __init xen_hvc_init(void)
}
r = 0;
+ register_fe:
#ifdef CONFIG_HVC_XEN_FRONTEND
r = xenbus_register_frontend(&xencons_driver);
#endif
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index 8d96e8696..274480a3c 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -1537,7 +1537,7 @@ static unsigned int card_count;
static int isicom_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
- unsigned int uninitialized_var(signature), index;
+ unsigned int signature, index;
int retval = -EPERM;
struct isi_board *board = NULL;
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 8c8aa3b9c..b0c5f0dba 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -85,7 +85,6 @@ struct serial8250_config {
#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */
#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */
#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */
-#define UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */
#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
diff --git a/drivers/tty/serial/8250/8250_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c
new file mode 100644
index 000000000..1cf229cca
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_dwlib.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Synopsys DesignWare 8250 library. */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_core.h>
+
+#include "8250_dwlib.h"
+
+/* Offsets for the DesignWare specific registers */
+#define DW_UART_DLF 0xc0 /* Divisor Latch Fraction Register */
+#define DW_UART_CPR 0xf4 /* Component Parameter Register */
+#define DW_UART_UCV 0xf8 /* UART Component Version */
+
+/* Component Parameter Register bits */
+#define DW_UART_CPR_ABP_DATA_WIDTH (3 << 0)
+#define DW_UART_CPR_AFCE_MODE (1 << 4)
+#define DW_UART_CPR_THRE_MODE (1 << 5)
+#define DW_UART_CPR_SIR_MODE (1 << 6)
+#define DW_UART_CPR_SIR_LP_MODE (1 << 7)
+#define DW_UART_CPR_ADDITIONAL_FEATURES (1 << 8)
+#define DW_UART_CPR_FIFO_ACCESS (1 << 9)
+#define DW_UART_CPR_FIFO_STAT (1 << 10)
+#define DW_UART_CPR_SHADOW (1 << 11)
+#define DW_UART_CPR_ENCODED_PARMS (1 << 12)
+#define DW_UART_CPR_DMA_EXTRA (1 << 13)
+#define DW_UART_CPR_FIFO_MODE (0xff << 16)
+
+/* Helper for FIFO size calculation */
+#define DW_UART_CPR_FIFO_SIZE(a) (((a >> 16) & 0xff) * 16)
+
+static inline u32 dw8250_readl_ext(struct uart_port *p, int offset)
+{
+ if (p->iotype == UPIO_MEM32BE)
+ return ioread32be(p->membase + offset);
+ return readl(p->membase + offset);
+}
+
+static inline void dw8250_writel_ext(struct uart_port *p, int offset, u32 reg)
+{
+ if (p->iotype == UPIO_MEM32BE)
+ iowrite32be(reg, p->membase + offset);
+ else
+ writel(reg, p->membase + offset);
+}
+
+/*
+ * divisor = div(I) + div(F)
+ * "I" means integer, "F" means fractional
+ * quot = div(I) = clk / (16 * baud)
+ * frac = div(F) * 2^dlf_size
+ *
+ * let rem = clk % (16 * baud)
+ * we have: div(F) * (16 * baud) = rem
+ * so frac = 2^dlf_size * rem / (16 * baud) = (rem << dlf_size) / (16 * baud)
+ */
+static unsigned int dw8250_get_divisor(struct uart_port *p, unsigned int baud,
+ unsigned int *frac)
+{
+ unsigned int quot, rem, base_baud = baud * 16;
+ struct dw8250_port_data *d = p->private_data;
+
+ quot = p->uartclk / base_baud;
+ rem = p->uartclk % base_baud;
+ *frac = DIV_ROUND_CLOSEST(rem << d->dlf_size, base_baud);
+
+ return quot;
+}
+
+static void dw8250_set_divisor(struct uart_port *p, unsigned int baud,
+ unsigned int quot, unsigned int quot_frac)
+{
+ dw8250_writel_ext(p, DW_UART_DLF, quot_frac);
+ serial8250_do_set_divisor(p, baud, quot, quot_frac);
+}
+
+void dw8250_setup_port(struct uart_port *p)
+{
+ struct uart_8250_port *up = up_to_u8250p(p);
+ u32 reg, old_dlf;
+
+ /*
+ * If the Component Version Register returns zero, we know that
+ * ADDITIONAL_FEATURES are not enabled. No need to go any further.
+ */
+ reg = dw8250_readl_ext(p, DW_UART_UCV);
+ if (!reg)
+ return;
+
+ dev_dbg(p->dev, "Designware UART version %c.%c%c\n",
+ (reg >> 24) & 0xff, (reg >> 16) & 0xff, (reg >> 8) & 0xff);
+
+ /* Preserve value written by firmware or bootloader */
+ old_dlf = dw8250_readl_ext(p, DW_UART_DLF);
+ dw8250_writel_ext(p, DW_UART_DLF, ~0U);
+ reg = dw8250_readl_ext(p, DW_UART_DLF);
+ dw8250_writel_ext(p, DW_UART_DLF, old_dlf);
+
+ if (reg) {
+ struct dw8250_port_data *d = p->private_data;
+
+ d->dlf_size = fls(reg);
+ p->get_divisor = dw8250_get_divisor;
+ p->set_divisor = dw8250_set_divisor;
+ }
+
+ reg = dw8250_readl_ext(p, DW_UART_CPR);
+ if (!reg)
+ return;
+
+ /* Select the type based on FIFO */
+ if (reg & DW_UART_CPR_FIFO_MODE) {
+ p->type = PORT_16550A;
+ p->flags |= UPF_FIXED_TYPE;
+ p->fifosize = DW_UART_CPR_FIFO_SIZE(reg);
+ up->capabilities = UART_CAP_FIFO;
+ }
+
+ if (reg & DW_UART_CPR_AFCE_MODE)
+ up->capabilities |= UART_CAP_AFE;
+
+ if (reg & DW_UART_CPR_SIR_MODE)
+ up->capabilities |= UART_CAP_IRDA;
+}
+EXPORT_SYMBOL_GPL(dw8250_setup_port);
diff --git a/drivers/tty/serial/8250/8250_dwlib.h b/drivers/tty/serial/8250/8250_dwlib.h
new file mode 100644
index 000000000..87a4db2a8
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_dwlib.h
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Synopsys DesignWare 8250 library header file. */
+
+#include <linux/types.h>
+
+#include "8250.h"
+
+struct dw8250_port_data {
+ /* Port properties */
+ int line;
+
+ /* DMA operations */
+ struct uart_8250_dma dma;
+
+ /* Hardware configuration */
+ u8 dlf_size;
+};
+
+void dw8250_setup_port(struct uart_port *p);
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index 5cd8c36c8..2acaea5f3 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -176,6 +176,7 @@ static int __init early_omap8250_setup(struct earlycon_device *device,
OF_EARLYCON_DECLARE(omap8250, "ti,omap2-uart", early_omap8250_setup);
OF_EARLYCON_DECLARE(omap8250, "ti,omap3-uart", early_omap8250_setup);
OF_EARLYCON_DECLARE(omap8250, "ti,omap4-uart", early_omap8250_setup);
+OF_EARLYCON_DECLARE(omap8250, "ti,am654-uart", early_omap8250_setup);
#endif
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 274e644f3..d05b155b4 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1049,14 +1049,6 @@ static int pci_oxsemi_tornado_init(struct pci_dev *dev)
return number_uarts;
}
-static int pci_asix_setup(struct serial_private *priv,
- const struct pciserial_board *board,
- struct uart_8250_port *port, int idx)
-{
- port->bugs |= UART_BUG_PARITY;
- return pci_default_setup(priv, board, port, idx);
-}
-
/* Quatech devices have their own extra interface features */
struct quatech_feature {
@@ -1683,7 +1675,6 @@ pci_wch_ch38x_setup(struct serial_private *priv,
#define PCI_DEVICE_ID_WCH_CH355_4S 0x7173
#define PCI_VENDOR_ID_AGESTAR 0x5372
#define PCI_DEVICE_ID_AGESTAR_9375 0x6872
-#define PCI_VENDOR_ID_ASIX 0x9710
#define PCI_DEVICE_ID_BROADCOM_TRUMANAGE 0x160a
#define PCI_DEVICE_ID_AMCC_ADDIDATA_APCI7800 0x818e
@@ -2455,16 +2446,6 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.setup = pci_wch_ch38x_setup,
},
/*
- * ASIX devices with FIFO bug
- */
- {
- .vendor = PCI_VENDOR_ID_ASIX,
- .device = PCI_ANY_ID,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- .setup = pci_asix_setup,
- },
- /*
* Broadcom TruManage (NetXtreme)
*/
{
@@ -4791,6 +4772,12 @@ static const struct pci_device_id serial_pci_tbl[] = {
pbn_b1_bt_1_115200 },
/*
+ * IntaShield IS-100
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x0D60,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_b2_1_115200 },
+ /*
* IntaShield IS-200
*/
{ PCI_VENDOR_ID_INTASHIELD, PCI_DEVICE_ID_INTASHIELD_IS200,
@@ -4817,10 +4804,14 @@ static const struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
pbn_b2_1_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0AA2,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_1_115200 },
/*
- * Brainboxes UC-257
+ * Brainboxes UC-253/UC-734
*/
- { PCI_VENDOR_ID_INTASHIELD, 0x0861,
+ { PCI_VENDOR_ID_INTASHIELD, 0x0CA1,
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
pbn_b2_2_115200 },
@@ -4856,6 +4847,14 @@ static const struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x08E2,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x08E3,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
/*
* Brainboxes UC-310
*/
@@ -4866,6 +4865,14 @@ static const struct pci_device_id serial_pci_tbl[] = {
/*
* Brainboxes UC-313
*/
+ { PCI_VENDOR_ID_INTASHIELD, 0x08A1,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x08A2,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
{ PCI_VENDOR_ID_INTASHIELD, 0x08A3,
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
@@ -4880,6 +4887,10 @@ static const struct pci_device_id serial_pci_tbl[] = {
/*
* Brainboxes UC-346
*/
+ { PCI_VENDOR_ID_INTASHIELD, 0x0B01,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_4_115200 },
{ PCI_VENDOR_ID_INTASHIELD, 0x0B02,
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
@@ -4891,6 +4902,10 @@ static const struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0A82,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
{ PCI_VENDOR_ID_INTASHIELD, 0x0A83,
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
@@ -4903,13 +4918,95 @@ static const struct pci_device_id serial_pci_tbl[] = {
0, 0,
pbn_b2_4_115200 },
/*
- * Brainboxes UC-420/431
+ * Brainboxes UC-420
*/
{ PCI_VENDOR_ID_INTASHIELD, 0x0921,
PCI_ANY_ID, PCI_ANY_ID,
0, 0,
pbn_b2_4_115200 },
/*
+ * Brainboxes UC-607
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x09A1,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x09A2,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x09A3,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ /*
+ * Brainboxes UC-836
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x0D41,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_4_115200 },
+ /*
+ * Brainboxes UP-189
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x0AC1,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0AC2,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0AC3,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ /*
+ * Brainboxes UP-200
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x0B21,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0B22,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0B23,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ /*
+ * Brainboxes UP-869
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x0C01,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0C02,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0C03,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ /*
+ * Brainboxes UP-880
+ */
+ { PCI_VENDOR_ID_INTASHIELD, 0x0C21,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0C22,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ { PCI_VENDOR_ID_INTASHIELD, 0x0C23,
+ PCI_ANY_ID, PCI_ANY_ID,
+ 0, 0,
+ pbn_b2_2_115200 },
+ /*
* Perle PCI-RAS cards
*/
{ PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index cba4888bc..7f5d51de6 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1910,7 +1910,10 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir)
skip_rx = true;
if (status & (UART_LSR_DR | UART_LSR_BI) && !skip_rx) {
- if (irqd_is_wakeup_set(irq_get_irq_data(port->irq)))
+ struct irq_data *d;
+
+ d = irq_get_irq_data(port->irq);
+ if (d && irqd_is_wakeup_set(d))
pm_wakeup_event(tport->tty->dev, 0);
if (!up->dma || handle_rx_dma(up, iir))
status = serial8250_rx_chars(up, status);
@@ -2617,11 +2620,8 @@ static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
if (c_cflag & CSTOPB)
cval |= UART_LCR_STOP;
- if (c_cflag & PARENB) {
+ if (c_cflag & PARENB)
cval |= UART_LCR_PARITY;
- if (up->bugs & UART_BUG_PARITY)
- up->fifo_bug = true;
- }
if (!(c_cflag & PARODD))
cval |= UART_LCR_EPAR;
#ifdef CMSPAR
@@ -2735,8 +2735,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
up->lcr = cval; /* Save computed LCR */
if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) {
- /* NOTE: If fifo_bug is not set, a user can set RX_trigger. */
- if ((baud < 2400 && !up->dma) || up->fifo_bug) {
+ if (baud < 2400 && !up->dma) {
up->fcr &= ~UART_FCR_TRIGGER_MASK;
up->fcr |= UART_FCR_TRIGGER_1;
}
@@ -3072,8 +3071,7 @@ static int do_set_rxtrig(struct tty_port *port, unsigned char bytes)
struct uart_8250_port *up = up_to_u8250p(uport);
int rxtrig;
- if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1 ||
- up->fifo_bug)
+ if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1)
return -EINVAL;
rxtrig = bytes_to_fcr_rxtrig(up, bytes);
@@ -3229,6 +3227,7 @@ void serial8250_init_port(struct uart_8250_port *up)
struct uart_port *port = &up->port;
spin_lock_init(&port->lock);
+ port->pm = NULL;
port->ops = &serial8250_pops;
up->cur_iotype = 0xFF;
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index a9ddd76d4..733ac3209 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -312,6 +312,9 @@ config SERIAL_8250_RSA
If you don't have such card, or if unsure, say N.
+config SERIAL_8250_DWLIB
+ bool
+
config SERIAL_8250_ACORN
tristate "Acorn expansion card serial port support"
depends on ARCH_ACORN && SERIAL_8250
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 18751bc63..9b451d815 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_SERIAL_8250) += 8250.o 8250_base.o
8250-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o
8250_base-y := 8250_port.o
8250_base-$(CONFIG_SERIAL_8250_DMA) += 8250_dma.o
+8250_base-$(CONFIG_SERIAL_8250_DWLIB) += 8250_dwlib.o
8250_base-$(CONFIG_SERIAL_8250_FINTEK) += 8250_fintek.o
obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o
obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 50c4058a0..1688c190f 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -791,11 +791,11 @@ static void atmel_complete_tx_dma(void *arg)
port->icount.tx += atmel_port->tx_len;
- spin_lock_irq(&atmel_port->lock_tx);
+ spin_lock(&atmel_port->lock_tx);
async_tx_ack(atmel_port->desc_tx);
atmel_port->cookie_tx = -EINVAL;
atmel_port->desc_tx = NULL;
- spin_unlock_irq(&atmel_port->lock_tx);
+ spin_unlock(&atmel_port->lock_tx);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index ad40c75bb..375d4790e 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1269,19 +1269,14 @@ static void cpm_uart_console_write(struct console *co, const char *s,
{
struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
unsigned long flags;
- int nolock = oops_in_progress;
- if (unlikely(nolock)) {
+ if (unlikely(oops_in_progress)) {
local_irq_save(flags);
- } else {
- spin_lock_irqsave(&pinfo->port.lock, flags);
- }
-
- cpm_uart_early_write(pinfo, s, count, true);
-
- if (unlikely(nolock)) {
+ cpm_uart_early_write(pinfo, s, count, true);
local_irq_restore(flags);
} else {
+ spin_lock_irqsave(&pinfo->port.lock, flags);
+ cpm_uart_early_write(pinfo, s, count, true);
spin_unlock_irqrestore(&pinfo->port.lock, flags);
}
}
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 36321d810..af23d41b9 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2136,6 +2136,8 @@ static int __init lpuart32_imx_early_console_setup(struct earlycon_device *devic
OF_EARLYCON_DECLARE(lpuart, "fsl,vf610-lpuart", lpuart_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,ls1021a-lpuart", lpuart32_early_console_setup);
OF_EARLYCON_DECLARE(lpuart32, "fsl,imx7ulp-lpuart", lpuart32_imx_early_console_setup);
+OF_EARLYCON_DECLARE(lpuart32, "fsl,imx8ulp-lpuart", lpuart32_imx_early_console_setup);
+OF_EARLYCON_DECLARE(lpuart32, "fsl,imx8qxp-lpuart", lpuart32_imx_early_console_setup);
EARLYCON_DECLARE(lpuart, lpuart_early_console_setup);
EARLYCON_DECLARE(lpuart32, lpuart32_early_console_setup);
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 1838d0be3..adb0bbcec 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -72,7 +72,8 @@
#define AML_UART_BAUD_USE BIT(23)
#define AML_UART_BAUD_XTAL BIT(24)
-#define AML_UART_PORT_NUM 6
+#define AML_UART_PORT_NUM 12
+#define AML_UART_PORT_OFFSET 6
#define AML_UART_DEV_NAME "ttyAML"
@@ -370,10 +371,14 @@ static void meson_uart_set_termios(struct uart_port *port,
else
val |= AML_UART_STOP_BIT_1SB;
- if (cflags & CRTSCTS)
- val &= ~AML_UART_TWO_WIRE_EN;
- else
+ if (cflags & CRTSCTS) {
+ if (port->flags & UPF_HARD_FLOW)
+ val &= ~AML_UART_TWO_WIRE_EN;
+ else
+ termios->c_cflag &= ~CRTSCTS;
+ } else {
val |= AML_UART_TWO_WIRE_EN;
+ }
writel(val, port->membase + AML_UART_CONTROL);
@@ -664,13 +669,27 @@ static int meson_uart_probe_clocks(struct platform_device *pdev,
static int meson_uart_probe(struct platform_device *pdev)
{
- struct resource *res_mem, *res_irq;
+ struct resource *res_mem;
struct uart_port *port;
+ u32 fifosize = 64; /* Default is 64, 128 for EE UART_0 */
int ret = 0;
+ int irq;
+ bool has_rtscts;
if (pdev->dev.of_node)
pdev->id = of_alias_get_id(pdev->dev.of_node, "serial");
+ if (pdev->id < 0) {
+ int id;
+
+ for (id = AML_UART_PORT_OFFSET; id < AML_UART_PORT_NUM; id++) {
+ if (!meson_ports[id]) {
+ pdev->id = id;
+ break;
+ }
+ }
+ }
+
if (pdev->id < 0 || pdev->id >= AML_UART_PORT_NUM)
return -EINVAL;
@@ -678,9 +697,12 @@ static int meson_uart_probe(struct platform_device *pdev)
if (!res_mem)
return -ENODEV;
- res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res_irq)
- return -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ of_property_read_u32(pdev->dev.of_node, "fifo-size", &fifosize);
+ has_rtscts = of_property_read_bool(pdev->dev.of_node, "uart-has-rtscts");
if (meson_ports[pdev->id]) {
dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);
@@ -703,14 +725,16 @@ static int meson_uart_probe(struct platform_device *pdev)
port->iotype = UPIO_MEM;
port->mapbase = res_mem->start;
port->mapsize = resource_size(res_mem);
- port->irq = res_irq->start;
+ port->irq = irq;
port->flags = UPF_BOOT_AUTOCONF | UPF_LOW_LATENCY;
+ if (has_rtscts)
+ port->flags |= UPF_HARD_FLOW;
port->dev = &pdev->dev;
port->line = pdev->id;
port->type = PORT_MESON;
port->x_char = 0;
port->ops = &meson_uart_ops;
- port->fifosize = 64;
+ port->fifosize = fifosize;
meson_ports[pdev->id] = port;
platform_set_drvdata(pdev, port);
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 964d6d33b..5f1f52cc6 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1199,8 +1199,12 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
continue;
rate = clk_get_rate(clk);
- if (!rate)
+ if (!rate) {
+ dev_err(ourport->port.dev,
+ "Failed to get clock rate for %s.\n", clkname);
+ clk_put(clk);
continue;
+ }
if (ourport->info->has_divslot) {
unsigned long div = rate / req_baud;
@@ -1226,10 +1230,18 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
calc_deviation = -calc_deviation;
if (calc_deviation < deviation) {
+ /*
+ * If we find a better clk, release the previous one, if
+ * any.
+ */
+ if (!IS_ERR(*best_clk))
+ clk_put(*best_clk);
*best_clk = clk;
best_quot = quot;
*clk_num = cnt;
deviation = calc_deviation;
+ } else {
+ clk_put(clk);
}
}
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index ebea4a9d8..c65f9194a 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -694,6 +694,18 @@ static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno)
case SC16IS7XX_IIR_RTOI_SRC:
case SC16IS7XX_IIR_XOFFI_SRC:
rxlen = sc16is7xx_port_read(port, SC16IS7XX_RXLVL_REG);
+
+ /*
+ * There is a silicon bug that makes the chip report a
+ * time-out interrupt but no data in the FIFO. This is
+ * described in errata section 18.1.4.
+ *
+ * When this happens, read one byte from the FIFO to
+ * clear the interrupt.
+ */
+ if (iir == SC16IS7XX_IIR_RTOI_SRC && !rxlen)
+ rxlen = 1;
+
if (rxlen)
sc16is7xx_handle_rx(port, rxlen, iir);
break;
@@ -1166,9 +1178,18 @@ static int sc16is7xx_gpio_direction_output(struct gpio_chip *chip,
state |= BIT(offset);
else
state &= ~BIT(offset);
- sc16is7xx_port_write(port, SC16IS7XX_IOSTATE_REG, state);
+
+ /*
+ * If we write IOSTATE first, and then IODIR, the output value is not
+ * transferred to the corresponding I/O pin.
+ * The datasheet states that each register bit will be transferred to
+ * the corresponding I/O pin programmed as output when writing to
+ * IOSTATE. Therefore, configure direction first with IODIR, and then
+ * set value after with IOSTATE.
+ */
sc16is7xx_port_update(port, SC16IS7XX_IODIR_REG, BIT(offset),
BIT(offset));
+ sc16is7xx_port_write(port, SC16IS7XX_IOSTATE_REG, state);
return 0;
}
@@ -1255,6 +1276,13 @@ static int sc16is7xx_probe(struct device *dev,
s->p[i].port.type = PORT_SC16IS7XX;
s->p[i].port.fifosize = SC16IS7XX_FIFO_SIZE;
s->p[i].port.flags = UPF_FIXED_TYPE | UPF_LOW_LATENCY;
+ s->p[i].port.iobase = i;
+ /*
+ * Use all ones as membase to make sure uart_configure_port() in
+ * serial_core.c does not abort for SPI/I2C devices where the
+ * membase address is not applicable.
+ */
+ s->p[i].port.membase = (void __iomem *)~0;
s->p[i].port.iotype = UPIO_PORT;
s->p[i].port.uartclk = freq;
s->p[i].port.rs485_config = sc16is7xx_config_rs485;
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index 41fe45f23..a30f7ed12 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -944,7 +944,11 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup)
tup->ier_shadow = 0;
tup->current_baud = 0;
- clk_prepare_enable(tup->uart_clk);
+ ret = clk_prepare_enable(tup->uart_clk);
+ if (ret) {
+ dev_err(tup->uport.dev, "could not enable clk\n");
+ return ret;
+ }
/* Reset the UART controller to clear all previous status.*/
reset_control_assert(tup->rst);
diff --git a/drivers/tty/tty_jobctrl.c b/drivers/tty/tty_jobctrl.c
index ffcab80ba..73fdd55c6 100644
--- a/drivers/tty/tty_jobctrl.c
+++ b/drivers/tty/tty_jobctrl.c
@@ -290,12 +290,7 @@ void disassociate_ctty(int on_exit)
return;
}
- spin_lock_irq(&current->sighand->siglock);
- put_pid(current->signal->tty_old_pgrp);
- current->signal->tty_old_pgrp = NULL;
- tty = tty_kref_get(current->signal->tty);
- spin_unlock_irq(&current->sighand->siglock);
-
+ tty = get_current_tty();
if (tty) {
unsigned long flags;
@@ -310,6 +305,16 @@ void disassociate_ctty(int on_exit)
tty_kref_put(tty);
}
+ /* If tty->ctrl.pgrp is not NULL, it may be assigned to
+ * current->signal->tty_old_pgrp in a race condition, and
+ * cause pid memleak. Release current->signal->tty_old_pgrp
+ * after tty->ctrl.pgrp set to NULL.
+ */
+ spin_lock_irq(&current->sighand->siglock);
+ put_pid(current->signal->tty_old_pgrp);
+ current->signal->tty_old_pgrp = NULL;
+ spin_unlock_irq(&current->sighand->siglock);
+
/* Now clear signal->tty under the lock */
read_lock(&tasklist_lock);
session_clear_tty(task_session(current));
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index 10a832a21..31ecba113 100644
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -586,18 +586,22 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
return -ENOMEM;
name = kstrdup(dev_name(&vdev->dev), GFP_KERNEL);
+ if (!name) {
+ rv = -ENOMEM;
+ goto free_port;
+ }
rv = vio_driver_init(&port->vio, vdev, VDEV_CONSOLE_CON, vcc_versions,
ARRAY_SIZE(vcc_versions), NULL, name);
if (rv)
- goto free_port;
+ goto free_name;
port->vio.debug = vcc_dbg_vio;
vcc_ldc_cfg.debug = vcc_dbg_ldc;
rv = vio_ldc_alloc(&port->vio, &vcc_ldc_cfg, port);
if (rv)
- goto free_port;
+ goto free_name;
spin_lock_init(&port->lock);
@@ -631,6 +635,11 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
goto unreg_tty;
}
port->domain = kstrdup(domain, GFP_KERNEL);
+ if (!port->domain) {
+ rv = -ENOMEM;
+ goto unreg_tty;
+ }
+
mdesc_release(hp);
@@ -660,8 +669,9 @@ free_table:
vcc_table_remove(port->index);
free_ldc:
vio_ldc_free(&port->vio);
-free_port:
+free_name:
kfree(name);
+free_port:
kfree(port);
return rv;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 00:05:08 +0000