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Serial driver fixes for 4.8-rc5

Browse Source 
Here are some small serial driver fixes for 4.8-rc5.  One fixes an
 oft-reported build issue with the fintek driver, another reverts a patch
 that was causing problems, one fixes a crash, and some new device ids
 were added.
 
 All of these have been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 lUzWBQb4to15YXhl8wtNF9ZbAJ9Gi2r5MEfXlnLStI3XM/gq8BdXGw==
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Merge tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull serial driver fixes from Greg KH:
 "Here are some small serial driver fixes for 4.8-rc5.  One fixes an
  oft-reported build issue with the fintek driver, another reverts a
  patch that was causing problems, one fixes a crash, and some new
  device ids were added.

  All of these have been in linux-next for a while"

* tag 'tty-4.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: 8250: added acces i/o products quad and octal serial cards
  serial: 8250_mid: fix divide error bug if baud rate is 0
  Revert "tty/serial/8250: use mctrl_gpio helpers"
  8250/fintek: rename IRQ_MODE macro
This commit is contained in:
Linus Torvalds 2016-09-03 11:29:31 -07:00
commit 39da979c98
10 changed files with 159 additions and 90 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
Documentation/devicetree/bindings/serial/8250.txt
View File

@ -42,9 +42,6 @@ Optional properties:
- auto-flow-control: one way to enable automatic flow control support. The
driver is allowed to detect support for the capability even without this
property.
- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD
line respectively. It will use specified GPIO instead of the peripheral
function pin for the UART feature. If unsure, don't specify this property.
Note:
* fsl,ns16550:
@ -66,19 +63,3 @@ Example:
interrupts = <10>;
reg-shift = <2>;
};
Example for OMAP UART using GPIO-based modem control signals:
uart4: serial@49042000 {
compatible = "ti,omap3-uart";
reg = <0x49042000 0x400>;
interrupts = <80>;
ti,hwmods = "uart4";
clock-frequency = <48000000>;
cts-gpios = <&gpio3 5 GPIO_ACTIVE_LOW>;
rts-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
dtr-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
dsr-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
dcd-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
rng-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
};

35
drivers/tty/serial/8250/8250.h
View File

@ -15,8 +15,6 @@
#include <linux/serial_reg.h>
#include <linux/dmaengine.h>
#include "../serial_mctrl_gpio.h"
struct uart_8250_dma {
int (*tx_dma)(struct uart_8250_port *p);
int (*rx_dma)(struct uart_8250_port *p);
@ -133,43 +131,12 @@ void serial8250_em485_destroy(struct uart_8250_port *p);
static inline void serial8250_out_MCR(struct uart_8250_port *up, int value)
{
int mctrl_gpio = 0;
serial_out(up, UART_MCR, value);
if (value & UART_MCR_RTS)
mctrl_gpio |= TIOCM_RTS;
if (value & UART_MCR_DTR)
mctrl_gpio |= TIOCM_DTR;
mctrl_gpio_set(up->gpios, mctrl_gpio);
}
static inline int serial8250_in_MCR(struct uart_8250_port *up)
{
int mctrl, mctrl_gpio = 0;
mctrl = serial_in(up, UART_MCR);
/* save current MCR values */
if (mctrl & UART_MCR_RTS)
mctrl_gpio |= TIOCM_RTS;
if (mctrl & UART_MCR_DTR)
mctrl_gpio |= TIOCM_DTR;
mctrl_gpio = mctrl_gpio_get_outputs(up->gpios, &mctrl_gpio);
if (mctrl_gpio & TIOCM_RTS)
mctrl |= UART_MCR_RTS;
else
mctrl &= ~UART_MCR_RTS;
if (mctrl_gpio & TIOCM_DTR)
mctrl |= UART_MCR_DTR;
else
mctrl &= ~UART_MCR_DTR;
return mctrl;
return serial_in(up, UART_MCR);
}
#if defined(__alpha__) && !defined(CONFIG_PCI)

9
drivers/tty/serial/8250/8250_core.c
View File

@ -974,8 +974,6 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
uart = serial8250_find_match_or_unused(&up->port);
if (uart && uart->port.type != PORT_8250_CIR) {
struct mctrl_gpios *gpios;
if (uart->port.dev)
uart_remove_one_port(&serial8250_reg, &uart->port);
@ -1013,13 +1011,6 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
if (up->port.flags & UPF_FIXED_TYPE)
uart->port.type = up->port.type;
gpios = mctrl_gpio_init(&uart->port, 0);
if (IS_ERR(gpios)) {
if (PTR_ERR(gpios) != -ENOSYS)
return PTR_ERR(gpios);
} else
uart->gpios = gpios;
serial8250_set_defaults(uart);
/* Possibly override default I/O functions. */

4
drivers/tty/serial/8250/8250_fintek.c
View File

@ -31,7 +31,7 @@
#define IO_ADDR2 0x60
#define LDN 0x7
#define IRQ_MODE 0x70
#define FINTEK_IRQ_MODE 0x70
#define IRQ_SHARE BIT(4)
#define IRQ_MODE_MASK (BIT(6) | BIT(5))
#define IRQ_LEVEL_LOW 0
@ -195,7 +195,7 @@ static int fintek_8250_set_irq_mode(struct fintek_8250 *pdata, bool level_mode)
outb(LDN, pdata->base_port + ADDR_PORT);
outb(pdata->index, pdata->base_port + DATA_PORT);
outb(IRQ_MODE, pdata->base_port + ADDR_PORT);
outb(FINTEK_IRQ_MODE, pdata->base_port + ADDR_PORT);
tmp = inb(pdata->base_port + DATA_PORT);
tmp &= ~IRQ_MODE_MASK;

3
drivers/tty/serial/8250/8250_mid.c
View File

@ -168,6 +168,9 @@ 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)

31
drivers/tty/serial/8250/8250_omap.c
View File

@ -134,21 +134,18 @@ static void omap8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
serial8250_do_set_mctrl(port, mctrl);
if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
UART_GPIO_RTS))) {
/*
* Turn off autoRTS if RTS is lowered and restore autoRTS
* setting if RTS is raised
*/
lcr = serial_in(up, UART_LCR);
serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
priv->efr |= UART_EFR_RTS;
else
priv->efr &= ~UART_EFR_RTS;
serial_out(up, UART_EFR, priv->efr);
serial_out(up, UART_LCR, lcr);
}
/*
* Turn off autoRTS if RTS is lowered and restore autoRTS setting
* if RTS is raised
*/
lcr = serial_in(up, UART_LCR);
serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
priv->efr |= UART_EFR_RTS;
else
priv->efr &= ~UART_EFR_RTS;
serial_out(up, UART_EFR, priv->efr);
serial_out(up, UART_LCR, lcr);
}
/*
@ -449,9 +446,7 @@ static void omap_8250_set_termios(struct uart_port *port,
priv->efr = 0;
up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF);
if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW
&& IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
UART_GPIO_RTS))) {
if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) {
/* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */
up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
priv->efr |= UART_EFR_CTS;

139
drivers/tty/serial/8250/8250_pci.c
View File

@ -1950,6 +1950,43 @@ 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
@ -5112,6 +5149,108 @@ static struct pci_device_id serial_pci_tbl[] = {
PCI_ANY_ID, PCI_ANY_ID,
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)
*/

7
drivers/tty/serial/8250/8250_port.c
View File

@ -1618,8 +1618,6 @@ static void serial8250_disable_ms(struct uart_port *port)
if (up->bugs & UART_BUG_NOMSR)
return;
mctrl_gpio_disable_ms(up->gpios);
up->ier &= ~UART_IER_MSI;
serial_port_out(port, UART_IER, up->ier);
}
@ -1632,8 +1630,6 @@ static void serial8250_enable_ms(struct uart_port *port)
if (up->bugs & UART_BUG_NOMSR)
return;
mctrl_gpio_enable_ms(up->gpios);
up->ier |= UART_IER_MSI;
serial8250_rpm_get(up);
@ -1917,8 +1913,7 @@ unsigned int serial8250_do_get_mctrl(struct uart_port *port)
ret |= TIOCM_DSR;
if (status & UART_MSR_CTS)
ret |= TIOCM_CTS;
return mctrl_gpio_get(up->gpios, &ret);
return ret;
}
EXPORT_SYMBOL_GPL(serial8250_do_get_mctrl);

1
drivers/tty/serial/8250/Kconfig
View File

@ -6,7 +6,6 @@
config SERIAL_8250
tristate "8250/16550 and compatible serial support"
select SERIAL_CORE
select SERIAL_MCTRL_GPIO if GPIOLIB
---help---
This selects whether you want to include the driver for the standard
serial ports. The standard answer is Y. People who might say N

1
include/linux/serial_8250.h
View File

@ -111,7 +111,6 @@ struct uart_8250_port {
* if no_console_suspend
*/
unsigned char probe;
struct mctrl_gpios *gpios;
#define UART_PROBE_RSA (1 << 0)
/*