summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/tty/serial
diff options
context:
space:
mode:
authorYunhong Jiang <yunhong.jiang@linux.intel.com>2017-03-08 23:13:28 -0800
committerYunhong Jiang <yunhong.jiang@linux.intel.com>2017-03-08 23:36:15 -0800
commit52f993b8e89487ec9ee15a7fb4979e0f09a45b27 (patch)
treed65304486afe0bea4a311c783c0d72791c8c0aa2 /kernel/drivers/tty/serial
parentc189ccac5702322ed843fe17057035b7222a59b6 (diff)
Upgrade to 4.4.50-rt62
The current kernel is based on rt kernel v4.4.6-rt14. We will upgrade it to 4.4.50-rt62. The command to achieve it is: a) Clone a git repo from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git b) Get the diff between this two changesets: git diff 640eca2901f3435e616157b11379d3223a44b391 705619beeea1b0b48219a683fd1a901a86fdaf5e where the two commits are: [yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only 640eca2901f3435e616157b11379d3223a44b391 640eca2901f3 v4.4.6-rt14 localversion-rt [yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only 705619beeea1b0b48219a683fd1a901a86fdaf5e 705619beeea1 Linux 4.4.50-rt62 localversion-rt c) One patch has been backported thus revert the patch before applying. filterdiff -p1 -x scripts/package/Makefile ~/tmp/v4.4.6-rt14-4.4.50-rt62.diff |patch -p1 --dry-run Upstream status: backport Change-Id: I244d57a32f6066e5a5b9915f9fbf99e7bbca6e01 Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>
Diffstat (limited to 'kernel/drivers/tty/serial')
-rw-r--r--kernel/drivers/tty/serial/8250/8250_dw.c2
-rw-r--r--kernel/drivers/tty/serial/8250/8250_mid.c38
-rw-r--r--kernel/drivers/tty/serial/8250/8250_pci.c142
-rw-r--r--kernel/drivers/tty/serial/8250/8250_port.c22
-rw-r--r--kernel/drivers/tty/serial/atmel_serial.c58
-rw-r--r--kernel/drivers/tty/serial/msm_serial.c2
-rw-r--r--kernel/drivers/tty/serial/samsung.c22
-rw-r--r--kernel/drivers/tty/serial/sh-sci.c39
-rw-r--r--kernel/drivers/tty/serial/sunhv.c6
-rw-r--r--kernel/drivers/tty/serial/ucc_uart.c3
10 files changed, 246 insertions, 88 deletions
diff --git a/kernel/drivers/tty/serial/8250/8250_dw.c b/kernel/drivers/tty/serial/8250/8250_dw.c
index a5d319e4a..8435c3f20 100644
--- a/kernel/drivers/tty/serial/8250/8250_dw.c
+++ b/kernel/drivers/tty/serial/8250/8250_dw.c
@@ -440,7 +440,7 @@ static int dw8250_probe(struct platform_device *pdev)
}
data->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
- if (IS_ERR(data->clk) && PTR_ERR(data->clk) == -EPROBE_DEFER) {
+ if (IS_ERR(data->pclk) && PTR_ERR(data->pclk) == -EPROBE_DEFER) {
err = -EPROBE_DEFER;
goto err_clk;
}
diff --git a/kernel/drivers/tty/serial/8250/8250_mid.c b/kernel/drivers/tty/serial/8250/8250_mid.c
index 88531a36b..83b3988eb 100644
--- a/kernel/drivers/tty/serial/8250/8250_mid.c
+++ b/kernel/drivers/tty/serial/8250/8250_mid.c
@@ -14,6 +14,7 @@
#include <linux/pci.h>
#include <linux/dma/hsu.h>
+#include <linux/8250_pci.h>
#include "8250.h"
@@ -24,6 +25,7 @@
#define PCI_DEVICE_ID_INTEL_DNV_UART 0x19d8
/* Intel MID Specific registers */
+#define INTEL_MID_UART_DNV_FISR 0x08
#define INTEL_MID_UART_PS 0x30
#define INTEL_MID_UART_MUL 0x34
#define INTEL_MID_UART_DIV 0x38
@@ -31,6 +33,7 @@
struct mid8250;
struct mid8250_board {
+ unsigned int flags;
unsigned long freq;
unsigned int base_baud;
int (*setup)(struct mid8250 *, struct uart_port *p);
@@ -88,16 +91,16 @@ static int tng_setup(struct mid8250 *mid, struct uart_port *p)
static int dnv_handle_irq(struct uart_port *p)
{
struct mid8250 *mid = p->private_data;
- int ret;
-
- ret = hsu_dma_irq(&mid->dma_chip, 0);
- ret |= hsu_dma_irq(&mid->dma_chip, 1);
-
- /* For now, letting the HW generate separate interrupt for the UART */
- if (ret)
- return ret;
-
- return serial8250_handle_irq(p, serial_port_in(p, UART_IIR));
+ unsigned int fisr = serial_port_in(p, INTEL_MID_UART_DNV_FISR);
+ int ret = IRQ_NONE;
+
+ if (fisr & BIT(2))
+ ret |= hsu_dma_irq(&mid->dma_chip, 1);
+ if (fisr & BIT(1))
+ ret |= hsu_dma_irq(&mid->dma_chip, 0);
+ if (fisr & BIT(0))
+ ret |= serial8250_handle_irq(p, serial_port_in(p, UART_IIR));
+ return ret;
}
#define DNV_DMA_CHAN_OFFSET 0x80
@@ -106,12 +109,13 @@ static int dnv_setup(struct mid8250 *mid, struct uart_port *p)
{
struct hsu_dma_chip *chip = &mid->dma_chip;
struct pci_dev *pdev = to_pci_dev(p->dev);
+ unsigned int bar = FL_GET_BASE(mid->board->flags);
int ret;
chip->dev = &pdev->dev;
chip->irq = pdev->irq;
chip->regs = p->membase;
- chip->length = pci_resource_len(pdev, 0);
+ chip->length = pci_resource_len(pdev, bar);
chip->offset = DNV_DMA_CHAN_OFFSET;
/* Falling back to PIO mode if DMA probing fails */
@@ -145,6 +149,9 @@ static void mid8250_set_termios(struct uart_port *p,
unsigned long w = BIT(24) - 1;
unsigned long mul, div;
+ /* Gracefully handle the B0 case: fall back to B9600 */
+ fuart = fuart ? fuart : 9600 * 16;
+
if (mid->board->freq < fuart) {
/* Find prescaler value that satisfies Fuart < Fref */
if (mid->board->freq > baud)
@@ -217,6 +224,7 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct uart_8250_port uart;
struct mid8250 *mid;
+ unsigned int bar;
int ret;
ret = pcim_enable_device(pdev);
@@ -230,6 +238,7 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
return -ENOMEM;
mid->board = (struct mid8250_board *)id->driver_data;
+ bar = FL_GET_BASE(mid->board->flags);
memset(&uart, 0, sizeof(struct uart_8250_port));
@@ -242,8 +251,8 @@ static int mid8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
uart.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT | UPF_FIXED_TYPE;
uart.port.set_termios = mid8250_set_termios;
- uart.port.mapbase = pci_resource_start(pdev, 0);
- uart.port.membase = pcim_iomap(pdev, 0, 0);
+ uart.port.mapbase = pci_resource_start(pdev, bar);
+ uart.port.membase = pcim_iomap(pdev, bar, 0);
if (!uart.port.membase)
return -ENOMEM;
@@ -282,18 +291,21 @@ static void mid8250_remove(struct pci_dev *pdev)
}
static const struct mid8250_board pnw_board = {
+ .flags = FL_BASE0,
.freq = 50000000,
.base_baud = 115200,
.setup = pnw_setup,
};
static const struct mid8250_board tng_board = {
+ .flags = FL_BASE0,
.freq = 38400000,
.base_baud = 1843200,
.setup = tng_setup,
};
static const struct mid8250_board dnv_board = {
+ .flags = FL_BASE1,
.freq = 133333333,
.base_baud = 115200,
.setup = dnv_setup,
diff --git a/kernel/drivers/tty/serial/8250/8250_pci.c b/kernel/drivers/tty/serial/8250/8250_pci.c
index 7cd6f9a90..029de3f99 100644
--- a/kernel/drivers/tty/serial/8250/8250_pci.c
+++ b/kernel/drivers/tty/serial/8250/8250_pci.c
@@ -1401,6 +1401,9 @@ byt_set_termios(struct uart_port *p, struct ktermios *termios,
unsigned long m, n;
u32 reg;
+ /* Gracefully handle the B0 case: fall back to B9600 */
+ fuart = fuart ? fuart : 9600 * 16;
+
/* Get Fuart closer to Fref */
fuart *= rounddown_pow_of_two(fref / fuart);
@@ -1949,6 +1952,43 @@ pci_wch_ch38x_setup(struct serial_private *priv,
#define PCI_DEVICE_ID_PERICOM_PI7C9X7954 0x7954
#define PCI_DEVICE_ID_PERICOM_PI7C9X7958 0x7958
+#define PCI_VENDOR_ID_ACCESIO 0x494f
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB 0x1051
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S 0x1053
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB 0x105C
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S 0x105E
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB 0x1091
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2 0x1093
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB 0x1099
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4 0x109B
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB 0x10D1
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM 0x10D3
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB 0x10DA
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM 0x10DC
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1 0x1108
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2 0x1110
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2 0x1111
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4 0x1118
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4 0x1119
+#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S 0x1152
+#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S 0x115A
+#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2 0x1190
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2 0x1191
+#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4 0x1198
+#define PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4 0x1199
+#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM 0x11D0
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4 0x105A
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4 0x105B
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8 0x106A
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8 0x106B
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4 0x1098
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8 0x10A9
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM 0x10D9
+#define PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM 0x10E9
+#define PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM 0x11D8
+
+
+
/* Unknown vendors/cards - this should not be in linux/pci_ids.h */
#define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584
#define PCI_SUBDEVICE_ID_UNKNOWN_0x1588 0x1588
@@ -5117,6 +5157,108 @@ static struct pci_device_id serial_pci_tbl[] = {
0,
0, pbn_pericom_PI7C9X7958 },
/*
+ * ACCES I/O Products quad
+ */
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SDB,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2S,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SDB,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4S,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_2DB,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_2,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4DB,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM232_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_2SMDB,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_2SM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SMDB,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_COM_4SM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_1,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_2,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_2,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM422_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM485_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2S,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4S,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_2,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_2,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM232_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_MPCIE_ICM232_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_2SM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7954 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM422_8,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM485_8,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_4,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM232_8,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_4SM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_COM_8SM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ { PCI_VENDOR_ID_ACCESIO, PCI_DEVICE_ID_ACCESIO_PCIE_ICM_4SM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_pericom_PI7C9X7958 },
+ /*
* Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke)
*/
{ PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560,
diff --git a/kernel/drivers/tty/serial/8250/8250_port.c b/kernel/drivers/tty/serial/8250/8250_port.c
index 5568d70ee..a0b9e8546 100644
--- a/kernel/drivers/tty/serial/8250/8250_port.c
+++ b/kernel/drivers/tty/serial/8250/8250_port.c
@@ -714,22 +714,16 @@ static int size_fifo(struct uart_8250_port *up)
*/
static unsigned int autoconfig_read_divisor_id(struct uart_8250_port *p)
{
- unsigned char old_dll, old_dlm, old_lcr;
- unsigned int id;
+ unsigned char old_lcr;
+ unsigned int id, old_dl;
old_lcr = serial_in(p, UART_LCR);
serial_out(p, UART_LCR, UART_LCR_CONF_MODE_A);
+ old_dl = serial_dl_read(p);
+ serial_dl_write(p, 0);
+ id = serial_dl_read(p);
+ serial_dl_write(p, old_dl);
- old_dll = serial_in(p, UART_DLL);
- old_dlm = serial_in(p, UART_DLM);
-
- serial_out(p, UART_DLL, 0);
- serial_out(p, UART_DLM, 0);
-
- id = serial_in(p, UART_DLL) | serial_in(p, UART_DLM) << 8;
-
- serial_out(p, UART_DLL, old_dll);
- serial_out(p, UART_DLM, old_dlm);
serial_out(p, UART_LCR, old_lcr);
return id;
@@ -2850,9 +2844,9 @@ void serial8250_console_write(struct uart_8250_port *up, const char *s,
serial8250_rpm_get(up);
- if (port->sysrq)
+ if (port->sysrq || oops_in_progress)
locked = 0;
- else if (oops_in_progress || in_kdb_printk())
+ else if (in_kdb_printk())
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
diff --git a/kernel/drivers/tty/serial/atmel_serial.c b/kernel/drivers/tty/serial/atmel_serial.c
index 942945589..a0f911641 100644
--- a/kernel/drivers/tty/serial/atmel_serial.c
+++ b/kernel/drivers/tty/serial/atmel_serial.c
@@ -277,6 +277,13 @@ static bool atmel_use_dma_rx(struct uart_port *port)
return atmel_port->use_dma_rx;
}
+static bool atmel_use_fifo(struct uart_port *port)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
+ return atmel_port->fifo_size;
+}
+
static unsigned int atmel_get_lines_status(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
@@ -463,6 +470,14 @@ static void atmel_stop_tx(struct uart_port *port)
/* disable PDC transmit */
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS);
}
+
+ /*
+ * Disable the transmitter.
+ * This is mandatory when DMA is used, otherwise the DMA buffer
+ * is fully transmitted.
+ */
+ atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXDIS);
+
/* Disable interrupts */
atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
@@ -478,21 +493,26 @@ static void atmel_start_tx(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- if (atmel_use_pdc_tx(port)) {
- if (atmel_uart_readl(port, ATMEL_PDC_PTSR) & ATMEL_PDC_TXTEN)
- /* The transmitter is already running. Yes, we
- really need this.*/
- return;
+ if (atmel_use_pdc_tx(port) && (atmel_uart_readl(port, ATMEL_PDC_PTSR)
+ & ATMEL_PDC_TXTEN))
+ /* The transmitter is already running. Yes, we
+ really need this.*/
+ return;
+ if (atmel_use_pdc_tx(port) || atmel_use_dma_tx(port))
if ((port->rs485.flags & SER_RS485_ENABLED) &&
!(port->rs485.flags & SER_RS485_RX_DURING_TX))
atmel_stop_rx(port);
+ if (atmel_use_pdc_tx(port))
/* re-enable PDC transmit */
atmel_uart_writel(port, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN);
- }
+
/* Enable interrupts */
atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
+
+ /* re-enable the transmitter */
+ atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXEN);
}
/*
@@ -2066,6 +2086,7 @@ static void atmel_serial_pm(struct uart_port *port, unsigned int state,
static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
unsigned long flags;
unsigned int old_mode, mode, imr, quot, baud;
@@ -2169,7 +2190,30 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
mode |= ATMEL_US_USMODE_RS485;
} else if (termios->c_cflag & CRTSCTS) {
/* RS232 with hardware handshake (RTS/CTS) */
- mode |= ATMEL_US_USMODE_HWHS;
+ if (atmel_use_fifo(port) &&
+ !mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS)) {
+ /*
+ * with ATMEL_US_USMODE_HWHS set, the controller will
+ * be able to drive the RTS pin high/low when the RX
+ * FIFO is above RXFTHRES/below RXFTHRES2.
+ * It will also disable the transmitter when the CTS
+ * pin is high.
+ * This mode is not activated if CTS pin is a GPIO
+ * because in this case, the transmitter is always
+ * disabled (there must be an internal pull-up
+ * responsible for this behaviour).
+ * If the RTS pin is a GPIO, the controller won't be
+ * able to drive it according to the FIFO thresholds,
+ * but it will be handled by the driver.
+ */
+ mode |= ATMEL_US_USMODE_HWHS;
+ } else {
+ /*
+ * For platforms without FIFO, the flow control is
+ * handled by the driver.
+ */
+ mode |= ATMEL_US_USMODE_NORMAL;
+ }
} else {
/* RS232 without hadware handshake */
mode |= ATMEL_US_USMODE_NORMAL;
diff --git a/kernel/drivers/tty/serial/msm_serial.c b/kernel/drivers/tty/serial/msm_serial.c
index dcde95547..e1de4944e 100644
--- a/kernel/drivers/tty/serial/msm_serial.c
+++ b/kernel/drivers/tty/serial/msm_serial.c
@@ -726,7 +726,7 @@ static void msm_handle_tx(struct uart_port *port)
return;
}
- pio_count = CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE);
+ pio_count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
dma_count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
dma_min = 1; /* Always DMA */
diff --git a/kernel/drivers/tty/serial/samsung.c b/kernel/drivers/tty/serial/samsung.c
index d72cd736b..237ef5573 100644
--- a/kernel/drivers/tty/serial/samsung.c
+++ b/kernel/drivers/tty/serial/samsung.c
@@ -1263,6 +1263,8 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
/* check to see if we need to change clock source */
if (ourport->baudclk != clk) {
+ clk_prepare_enable(clk);
+
s3c24xx_serial_setsource(port, clk_sel);
if (!IS_ERR(ourport->baudclk)) {
@@ -1270,8 +1272,6 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
ourport->baudclk = ERR_PTR(-EINVAL);
}
- clk_prepare_enable(clk);
-
ourport->baudclk = clk;
ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0;
}
@@ -1676,7 +1676,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
return -ENODEV;
if (port->mapbase != 0)
- return 0;
+ return -EINVAL;
/* setup info for port */
port->dev = &platdev->dev;
@@ -1730,22 +1730,25 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
ourport->dma = devm_kzalloc(port->dev,
sizeof(*ourport->dma),
GFP_KERNEL);
- if (!ourport->dma)
- return -ENOMEM;
+ if (!ourport->dma) {
+ ret = -ENOMEM;
+ goto err;
+ }
}
ourport->clk = clk_get(&platdev->dev, "uart");
if (IS_ERR(ourport->clk)) {
pr_err("%s: Controller clock not found\n",
dev_name(&platdev->dev));
- return PTR_ERR(ourport->clk);
+ ret = PTR_ERR(ourport->clk);
+ goto err;
}
ret = clk_prepare_enable(ourport->clk);
if (ret) {
pr_err("uart: clock failed to prepare+enable: %d\n", ret);
clk_put(ourport->clk);
- return ret;
+ goto err;
}
/* Keep all interrupts masked and cleared */
@@ -1761,7 +1764,12 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
/* reset the fifos (and setup the uart) */
s3c24xx_serial_resetport(port, cfg);
+
return 0;
+
+err:
+ port->mapbase = 0;
+ return ret;
}
/* Device driver serial port probe */
diff --git a/kernel/drivers/tty/serial/sh-sci.c b/kernel/drivers/tty/serial/sh-sci.c
index 51c7507b0..63a06ab6b 100644
--- a/kernel/drivers/tty/serial/sh-sci.c
+++ b/kernel/drivers/tty/serial/sh-sci.c
@@ -38,7 +38,6 @@
#include <linux/major.h>
#include <linux/module.h>
#include <linux/mm.h>
-#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
@@ -116,8 +115,6 @@ struct sci_port {
struct timer_list rx_timer;
unsigned int rx_timeout;
#endif
-
- struct notifier_block freq_transition;
};
#define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS
@@ -1606,29 +1603,6 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
return ret;
}
-/*
- * Here we define a transition notifier so that we can update all of our
- * ports' baud rate when the peripheral clock changes.
- */
-static int sci_notifier(struct notifier_block *self,
- unsigned long phase, void *p)
-{
- struct sci_port *sci_port;
- unsigned long flags;
-
- sci_port = container_of(self, struct sci_port, freq_transition);
-
- if (phase == CPUFREQ_POSTCHANGE) {
- struct uart_port *port = &sci_port->port;
-
- spin_lock_irqsave(&port->lock, flags);
- port->uartclk = clk_get_rate(sci_port->iclk);
- spin_unlock_irqrestore(&port->lock, flags);
- }
-
- return NOTIFY_OK;
-}
-
static const struct sci_irq_desc {
const char *desc;
irq_handler_t handler;
@@ -2559,9 +2533,6 @@ static int sci_remove(struct platform_device *dev)
{
struct sci_port *port = platform_get_drvdata(dev);
- cpufreq_unregister_notifier(&port->freq_transition,
- CPUFREQ_TRANSITION_NOTIFIER);
-
uart_remove_one_port(&sci_uart_driver, &port->port);
sci_cleanup_single(port);
@@ -2714,16 +2685,6 @@ static int sci_probe(struct platform_device *dev)
if (ret)
return ret;
- sp->freq_transition.notifier_call = sci_notifier;
-
- ret = cpufreq_register_notifier(&sp->freq_transition,
- CPUFREQ_TRANSITION_NOTIFIER);
- if (unlikely(ret < 0)) {
- uart_remove_one_port(&sci_uart_driver, &sp->port);
- sci_cleanup_single(sp);
- return ret;
- }
-
#ifdef CONFIG_SH_STANDARD_BIOS
sh_bios_gdb_detach();
#endif
diff --git a/kernel/drivers/tty/serial/sunhv.c b/kernel/drivers/tty/serial/sunhv.c
index ca0d3802f..4e603d060 100644
--- a/kernel/drivers/tty/serial/sunhv.c
+++ b/kernel/drivers/tty/serial/sunhv.c
@@ -490,12 +490,6 @@ static void sunhv_console_write_bychar(struct console *con, const char *s, unsig
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
- if (port->sysrq) {
- locked = 0;
- } else if (oops_in_progress) {
- locked = spin_trylock(&port->lock);
- } else
- spin_lock(&port->lock);
for (i = 0; i < n; i++) {
if (*s == '\n')
diff --git a/kernel/drivers/tty/serial/ucc_uart.c b/kernel/drivers/tty/serial/ucc_uart.c
index 73190f5d2..71d26c8e1 100644
--- a/kernel/drivers/tty/serial/ucc_uart.c
+++ b/kernel/drivers/tty/serial/ucc_uart.c
@@ -1478,6 +1478,9 @@ static const struct of_device_id ucc_uart_match[] = {
.type = "serial",
.compatible = "ucc_uart",
},
+ {
+ .compatible = "fsl,t1040-ucc-uart",
+ },
{},
};
MODULE_DEVICE_TABLE(of, ucc_uart_match);