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TTY/Serial driver update for 3.15-rc1 

Here's the big tty/serial driver update for 3.15-rc1.
 
 Nothing major, a number of serial driver updates and a few tty core
 fixes as well.
 
 All have been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver update from Greg KH:
 "Here's the big tty/serial driver update for 3.15-rc1.

  Nothing major, a number of serial driver updates and a few tty core
  fixes as well.

  All have been in linux-next for a while"

* tag 'tty-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (71 commits)
  tty/serial: omap: empty the RX FIFO at the end of half-duplex TX
  tty/serial: omap: fix RX interrupt enable/disable in half-duplex TX
  serial: sh-sci: Neaten dev_<level> uses
  serial: sh-sci: Replace hardcoded 3 by UART_PM_STATE_OFF
  serial: sh-sci: Add more register documentation
  serial: sh-sci: Remove useless casts
  serial: sh-sci: Replace printk() by pr_*()
  serial_core: Avoid NULL pointer dereference in uart_close()
  serial_core: Get a reference for port->tty in uart_remove_one_port()
  serial: clps711x: Give a chance to perform useful tasks during wait loop
  serial_core: Grammar s/ports/port's/
  serial_core: Spelling s/contro/control/
  serial: efm32: properly namespace location property
  serial: max310x: Add missing #include <linux/uaccess.h>
  synclink: fix info leak in ioctl
  serial: 8250: Clean up the locking for -rt
  serial: 8250_pci: change BayTrail default uartclk
  serial: 8250_pci: more BayTrail error-free bauds
  serial: sh-sci: Add missing call to uart_remove_one_port() in failure path
  serial_core: Unregister console in uart_remove_one_port()
  ...
This commit is contained in:
Linus Torvalds 2014-04-01 16:55:57 -07:00
parent c12e69c6aa 3a13884abe
commit cb15955638
43 changed files with 1232 additions and 846 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/serial/efm32-uart.txt
View File

@ -6,7 +6,7 @@ Required properties:
- interrupts : Should contain uart interrupt
Optional properties:
- location : Decides the location of the USART I/O pins.
- efm32,location : Decides the location of the USART I/O pins.
Allowed range : [0 .. 5]
Default: 0
@ -16,5 +16,5 @@ uart@0x4000c400 {
compatible = "efm32,uart";
reg = <0x4000c400 0x400>;
interrupts = <15>;
location = <0>;
efm32,location = <0>;
};

13
Documentation/devicetree/bindings/serial/fsl-lpuart.txt
View File

@ -4,6 +4,14 @@ Required properties:
- compatible : Should be "fsl,<soc>-lpuart"
- reg : Address and length of the register set for the device
- interrupts : Should contain uart interrupt
- clocks : phandle + clock specifier pairs, one for each entry in clock-names
- clock-names : should contain: "ipg" - the uart clock
Optional properties:
- dmas: A list of two dma specifiers, one for each entry in dma-names.
- dma-names: should contain "tx" and "rx".
Note: Optional properties for DMA support. Write them both or both not.
Example:
@ -11,4 +19,9 @@ uart0: serial@40027000 {
compatible = "fsl,vf610-lpuart";
reg = <0x40027000 0x1000>;
interrupts = <0 61 0x00>;
clocks = <&clks VF610_CLK_UART0>;
clock-names = "ipg";
dmas = <&edma0 0 2>,
<&edma0 0 3>;
dma-names = "rx","tx";
};

36
Documentation/devicetree/bindings/serial/maxim,max310x.txt Normal file
View File

@ -0,0 +1,36 @@
* Maxim MAX310X advanced Universal Asynchronous Receiver-Transmitter (UART)
Required properties:
- compatible: Should be one of the following:
- "maxim,max3107" for Maxim MAX3107,
- "maxim,max3108" for Maxim MAX3108,
- "maxim,max3109" for Maxim MAX3109,
- "maxim,max14830" for Maxim MAX14830.
- reg: SPI chip select number.
- interrupt-parent: The phandle for the interrupt controller that
services interrupts for this IC.
- interrupts: Specifies the interrupt source of the parent interrupt
controller. The format of the interrupt specifier depends on the
parent interrupt controller.
- clocks: phandle to the IC source clock.
- clock-names: Should be "xtal" if clock is an external crystal or
"osc" if an external clock source is used.
Optional properties:
- gpio-controller: Marks the device node as a GPIO controller.
- #gpio-cells: Should be two. The first cell is the GPIO number and
the second cell is used to specify the GPIO polarity:
0 = active high,
1 = active low.
Example:
max14830: max14830@0 {
compatible = "maxim,max14830";
reg = <0>;
clocks = <&clk20m>;
clock-names = "osc";
interrupt-parent = <&gpio3>;
interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
gpio-controller;
#gpio-cells = <2>;
};

2
Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
View File

@ -37,7 +37,7 @@ Example:
};
scifa0: serial@e6c40000 {
compatible = "renesas,scifa-r8a7790", "renesas,scifa-generic";
compatible = "renesas,scifa-r8a7790", "renesas,scifa";
reg = <0 0xe6c40000 0 64>;
interrupt-parent = <&gic>;
interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>;

17
arch/arm/boot/dts/atlas6.dtsi
View File

@ -217,8 +217,8 @@ uart0: uart@b0050000 {
interrupts = <17>;
fifosize = <128>;
clocks = <&clks 13>;
sirf,uart-dma-rx-channel = <21>;
sirf,uart-dma-tx-channel = <2>;
dmas = <&dmac1 5>, <&dmac0 2>;
dma-names = "rx", "tx";
};
uart1: uart@b0060000 {
@ -228,6 +228,7 @@ uart1: uart@b0060000 {
interrupts = <18>;
fifosize = <32>;
clocks = <&clks 14>;
dma-names = "no-rx", "no-tx";
};
uart2: uart@b0070000 {
@ -237,8 +238,8 @@ uart2: uart@b0070000 {
interrupts = <19>;
fifosize = <128>;
clocks = <&clks 15>;
sirf,uart-dma-rx-channel = <6>;
sirf,uart-dma-tx-channel = <7>;
dmas = <&dmac0 6>, <&dmac0 7>;
dma-names = "rx", "tx";
};
usp0: usp@b0080000 {
@ -248,8 +249,8 @@ usp0: usp@b0080000 {
interrupts = <20>;
fifosize = <128>;
clocks = <&clks 28>;
sirf,usp-dma-rx-channel = <17>;
sirf,usp-dma-tx-channel = <18>;
dmas = <&dmac1 1>, <&dmac1 2>;
dma-names = "rx", "tx";
};
usp1: usp@b0090000 {
@ -259,8 +260,8 @@ usp1: usp@b0090000 {
interrupts = <21>;
fifosize = <128>;
clocks = <&clks 29>;
sirf,usp-dma-rx-channel = <14>;
sirf,usp-dma-tx-channel = <15>;
dmas = <&dmac0 14>, <&dmac0 15>;
dma-names = "rx", "tx";
};
dmac0: dma-controller@b00b0000 {

20
arch/arm/boot/dts/prima2.dtsi
View File

@ -223,8 +223,8 @@ uart0: uart@b0050000 {
interrupts = <17>;
fifosize = <128>;
clocks = <&clks 13>;
sirf,uart-dma-rx-channel = <21>;
sirf,uart-dma-tx-channel = <2>;
dmas = <&dmac1 5>, <&dmac0 2>;
dma-names = "rx", "tx";
};
uart1: uart@b0060000 {
@ -243,8 +243,8 @@ uart2: uart@b0070000 {
interrupts = <19>;
fifosize = <128>;
clocks = <&clks 15>;
sirf,uart-dma-rx-channel = <6>;
sirf,uart-dma-tx-channel = <7>;
dmas = <&dmac0 6>, <&dmac0 7>;
dma-names = "rx", "tx";
};
usp0: usp@b0080000 {
@ -254,8 +254,8 @@ usp0: usp@b0080000 {
interrupts = <20>;
fifosize = <128>;
clocks = <&clks 28>;
sirf,usp-dma-rx-channel = <17>;
sirf,usp-dma-tx-channel = <18>;
dmas = <&dmac1 1>, <&dmac1 2>;
dma-names = "rx", "tx";
};
usp1: usp@b0090000 {
@ -265,8 +265,8 @@ usp1: usp@b0090000 {
interrupts = <21>;
fifosize = <128>;
clocks = <&clks 29>;
sirf,usp-dma-rx-channel = <14>;
sirf,usp-dma-tx-channel = <15>;
dmas = <&dmac0 14>, <&dmac0 15>;
dma-names = "rx", "tx";
};
usp2: usp@b00a0000 {
@ -276,8 +276,8 @@ usp2: usp@b00a0000 {
interrupts = <22>;
fifosize = <128>;
clocks = <&clks 30>;
sirf,usp-dma-rx-channel = <10>;
sirf,usp-dma-tx-channel = <11>;
dmas = <&dmac0 10>, <&dmac0 11>;
dma-names = "rx", "tx";
};
dmac0: dma-controller@b00b0000 {

21
arch/arm/mach-imx/mach-mx31moboard.c
View File

@ -128,27 +128,15 @@ static struct platform_device mx31moboard_flash = {
.num_resources = 1,
};
static int moboard_uart0_init(struct platform_device *pdev)
{
int ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_CTS1), "uart0-cts-hack");
if (ret)
return ret;
ret = gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_CTS1), 0);
if (ret)
gpio_free(IOMUX_TO_GPIO(MX31_PIN_CTS1));
return ret;
}
static void moboard_uart0_exit(struct platform_device *pdev)
static void __init moboard_uart0_init(void)
{
if (!gpio_request(IOMUX_TO_GPIO(MX31_PIN_CTS1), "uart0-cts-hack")) {
gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_CTS1), 0);
gpio_free(IOMUX_TO_GPIO(MX31_PIN_CTS1));
}
}
static const struct imxuart_platform_data uart0_pdata __initconst = {
.init = moboard_uart0_init,
.exit = moboard_uart0_exit,
};
static const struct imxuart_platform_data uart4_pdata __initconst = {
@ -543,6 +531,7 @@ static void __init mx31moboard_init(void)
imx31_add_imx2_wdt();
moboard_uart0_init();
imx31_add_imx_uart0(&uart0_pdata);
imx31_add_imx_uart4(&uart4_pdata);

6
drivers/tty/hvc/hvc_console.c
View File

@ -31,6 +31,7 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/major.h>
#include <linux/atomic.h>
#include <linux/sysrq.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
@ -70,6 +71,9 @@ static struct task_struct *hvc_task;
/* Picks up late kicks after list walk but before schedule() */
static int hvc_kicked;
/* hvc_init is triggered from hvc_alloc, i.e. only when actually used */
static atomic_t hvc_needs_init __read_mostly = ATOMIC_INIT(-1);
static int hvc_init(void);
#ifdef CONFIG_MAGIC_SYSRQ
@ -851,7 +855,7 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
int i;
/* We wait until a driver actually comes along */
if (!hvc_driver) {
if (atomic_inc_not_zero(&hvc_needs_init)) {
int err = hvc_init();
if (err)
return ERR_PTR(err);

3
drivers/tty/ipwireless/tty.c
View File

@ -176,9 +176,6 @@ void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data,
": %d chars not inserted to flip buffer!\n",
length - work);
/*
* This may sleep if ->low_latency is set
*/
if (work)
tty_flip_buffer_push(&tty->port);
}

11
drivers/tty/n_tty.c
View File

@ -1900,13 +1900,10 @@ static inline int input_available_p(struct tty_struct *tty, int poll)
struct n_tty_data *ldata = tty->disc_data;
int amt = poll && !TIME_CHAR(tty) && MIN_CHAR(tty) ? MIN_CHAR(tty) : 1;
if (ldata->icanon && !L_EXTPROC(tty)) {
if (ldata->canon_head != ldata->read_tail)
return 1;
} else if (read_cnt(ldata) >= amt)
return 1;
return 0;
if (ldata->icanon && !L_EXTPROC(tty))
return ldata->canon_head != ldata->read_tail;
else
return read_cnt(ldata) >= amt;
}
/**

19
drivers/tty/serial/8250/8250_core.c
View File

@ -1694,6 +1694,10 @@ static int serial_link_irq_chain(struct uart_8250_port *up)
static void serial_unlink_irq_chain(struct uart_8250_port *up)
{
/*
* yes, some broken gcc emit "warning: 'i' may be used uninitialized"
* but no, we are not going to take a patch that assigns NULL below.
*/
struct irq_info *i;
struct hlist_node *n;
struct hlist_head *h;
@ -2882,14 +2886,10 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
touch_nmi_watchdog();
local_irq_save(flags);
if (port->sysrq) {
/* serial8250_handle_irq() already took the lock */
locked = 0;
} else if (oops_in_progress) {
locked = spin_trylock(&port->lock);
} else
spin_lock(&port->lock);
if (port->sysrq || oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
/*
* First save the IER then disable the interrupts
@ -2921,8 +2921,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
serial8250_modem_status(up);
if (locked)
spin_unlock(&port->lock);
local_irq_restore(flags);
spin_unlock_irqrestore(&port->lock, flags);
}
static int __init serial8250_console_setup(struct console *co, char *options)

43
drivers/tty/serial/8250/8250_pci.c
View File

@ -1366,23 +1366,44 @@ byt_set_termios(struct uart_port *p, struct ktermios *termios,
struct ktermios *old)
{
unsigned int baud = tty_termios_baud_rate(termios);
unsigned int m = 6912;
unsigned int n = 15625;
unsigned int m, n;
u32 reg;
/* For baud rates 1M, 2M, 3M and 4M the dividers must be adjusted. */
if (baud == 1000000 || baud == 2000000 || baud == 4000000) {
/*
* For baud rates 0.5M, 1M, 1.5M, 2M, 2.5M, 3M, 3.5M and 4M the
* dividers must be adjusted.
*
* uartclk = (m / n) * 100 MHz, where m <= n
*/
switch (baud) {
case 500000:
case 1000000:
case 2000000:
case 4000000:
m = 64;
n = 100;
p->uartclk = 64000000;
} else if (baud == 3000000) {
break;
case 3500000:
m = 56;
n = 100;
p->uartclk = 56000000;
break;
case 1500000:
case 3000000:
m = 48;
n = 100;
p->uartclk = 48000000;
} else {
p->uartclk = 44236800;
break;
case 2500000:
m = 40;
n = 100;
p->uartclk = 40000000;
break;
default:
m = 2304;
n = 3125;
p->uartclk = 73728000;
}
/* Reset the clock */
@ -3449,6 +3470,10 @@ static struct pciserial_board pci_boards[] = {
.base_baud = 921600,
.reg_shift = 2,
},
/*
* Intel BayTrail HSUART reference clock is 44.2368 MHz at power-on,
* but is overridden by byt_set_termios.
*/
[pbn_byt] = {
.flags = FL_BASE0,
.num_ports = 1,

4
drivers/tty/serial/Kconfig
View File

@ -289,7 +289,7 @@ config SERIAL_MAX3100
MAX3100 chip support
config SERIAL_MAX310X
bool "MAX310X support"
tristate "MAX310X support"
depends on SPI_MASTER
select SERIAL_CORE
select REGMAP_SPI if SPI_MASTER
@ -708,7 +708,7 @@ config SERIAL_IP22_ZILOG_CONSOLE
config SERIAL_SH_SCI
tristate "SuperH SCI(F) serial port support"
depends on HAVE_CLK && (SUPERH || ARM || COMPILE_TEST)
depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST
select SERIAL_CORE
config SERIAL_SH_SCI_NR_UARTS

21
drivers/tty/serial/amba-pl011.c
View File

@ -2154,9 +2154,19 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
amba_ports[i] = uap;
amba_set_drvdata(dev, uap);
if (!amba_reg.state) {
ret = uart_register_driver(&amba_reg);
if (ret < 0) {
pr_err("Failed to register AMBA-PL011 driver\n");
return ret;
}
}
ret = uart_add_one_port(&amba_reg, &uap->port);
if (ret) {
amba_ports[i] = NULL;
uart_unregister_driver(&amba_reg);
pl011_dma_remove(uap);
}
out:
@ -2175,6 +2185,7 @@ static int pl011_remove(struct amba_device *dev)
amba_ports[i] = NULL;
pl011_dma_remove(uap);
uart_unregister_driver(&amba_reg);
return 0;
}
@ -2230,22 +2241,14 @@ static struct amba_driver pl011_driver = {
static int __init pl011_init(void)
{
int ret;
printk(KERN_INFO "Serial: AMBA PL011 UART driver\n");
ret = uart_register_driver(&amba_reg);
if (ret == 0) {
ret = amba_driver_register(&pl011_driver);
if (ret)
uart_unregister_driver(&amba_reg);
}
return ret;
return amba_driver_register(&pl011_driver);
}
static void __exit pl011_exit(void)
{
amba_driver_unregister(&pl011_driver);
uart_unregister_driver(&amba_reg);
}
/*

28
drivers/tty/serial/atmel_serial.c
View File

@ -115,9 +115,6 @@ static void atmel_stop_rx(struct uart_port *port);
#define UART_PUT_TCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TCR)
#define UART_GET_TCR(port) __raw_readl((port)->membase + ATMEL_PDC_TCR)
static int (*atmel_open_hook)(struct uart_port *);
static void (*atmel_close_hook)(struct uart_port *);
struct atmel_dma_buffer {
unsigned char *buf;
dma_addr_t dma_addr;
@ -1555,7 +1552,7 @@ static int atmel_startup(struct uart_port *port)
retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED,
tty ? tty->name : "atmel_serial", port);
if (retval) {
printk("atmel_serial: atmel_startup - Can't get irq\n");
dev_err(port->dev, "atmel_startup - Can't get irq\n");
return retval;
}
@ -1575,17 +1572,6 @@ static int atmel_startup(struct uart_port *port)
if (retval < 0)
atmel_set_ops(port);
}
/*
* If there is a specific "open" function (to register
* control line interrupts)
*/
if (atmel_open_hook) {
retval = atmel_open_hook(port);
if (retval) {
free_irq(port->irq, port);
return retval;
}
}
/* Save current CSR for comparison in atmel_tasklet_func() */
atmel_port->irq_status_prev = UART_GET_CSR(port);
@ -1684,13 +1670,6 @@ static void atmel_shutdown(struct uart_port *port)
* Free the interrupt
*/
free_irq(port->irq, port);
/*
* If there is a specific "close" function (to unregister
* control line interrupts)
*/
if (atmel_close_hook)
atmel_close_hook(port);
}
/*
@ -1738,7 +1717,7 @@ static void atmel_serial_pm(struct uart_port *port, unsigned int state,
clk_disable_unprepare(atmel_port->clk);
break;
default:
printk(KERN_ERR "atmel_serial: unknown pm %d\n", state);
dev_err(port->dev, "atmel_serial: unknown pm %d\n", state);
}
}
@ -1853,13 +1832,10 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
mode &= ~ATMEL_US_USMODE;
if (atmel_port->rs485.flags & SER_RS485_ENABLED) {
dev_dbg(port->dev, "Setting UART to RS485\n");
if ((atmel_port->rs485.delay_rts_after_send) > 0)
UART_PUT_TTGR(port,
atmel_port->rs485.delay_rts_after_send);
mode |= ATMEL_US_USMODE_RS485;
} else {
dev_dbg(port->dev, "Setting UART to RS232\n");
}
/* set the parity, stop bits and data size */

16
drivers/tty/serial/bcm63xx_uart.c
View File

@ -30,6 +30,8 @@
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_bcm63xx.h>
#include <linux/io.h>
#include <linux/of.h>
#define BCM63XX_NR_UARTS 2
@ -588,7 +590,7 @@ static int bcm_uart_request_port(struct uart_port *port)
{
unsigned int size;
size = RSET_UART_SIZE;
size = UART_REG_SIZE;
if (!request_mem_region(port->mapbase, size, "bcm63xx")) {
dev_err(port->dev, "Memory region busy\n");
return -EBUSY;
@ -608,7 +610,7 @@ static int bcm_uart_request_port(struct uart_port *port)
*/
static void bcm_uart_release_port(struct uart_port *port)
{
release_mem_region(port->mapbase, RSET_UART_SIZE);
release_mem_region(port->mapbase, UART_REG_SIZE);
iounmap(port->membase);
}
@ -805,6 +807,9 @@ static int bcm_uart_probe(struct platform_device *pdev)
struct clk *clk;
int ret;
if (pdev->dev.of_node)
pdev->id = of_alias_get_id(pdev->dev.of_node, "uart");
if (pdev->id < 0 || pdev->id >= BCM63XX_NR_UARTS)
return -EINVAL;
@ -856,6 +861,12 @@ static int bcm_uart_remove(struct platform_device *pdev)
return 0;
}
static const struct of_device_id bcm63xx_of_match[] = {
{ .compatible = "brcm,bcm6345-uart" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, bcm63xx_of_match);
/*
* platform driver stuff
*/
@ -865,6 +876,7 @@ static struct platform_driver bcm_uart_platform_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "bcm63xx_uart",
.of_match_table = bcm63xx_of_match,
},
};

19
drivers/tty/serial/clps711x.c
View File

@ -368,11 +368,16 @@ static const struct uart_ops uart_clps711x_ops = {
static void uart_clps711x_console_putchar(struct uart_port *port, int ch)
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
/* Wait for FIFO is not full */
while (1) {
u32 sysflg = 0;
do {
regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
} while (sysflg & SYSFLG_UTXFF);
if (!(sysflg & SYSFLG_UTXFF))
break;
cond_resched();
}
writew(ch, port->membase + UARTDR_OFFSET);
}
@ -382,14 +387,18 @@ static void uart_clps711x_console_write(struct console *co, const char *c,
{
struct uart_port *port = clps711x_uart.state[co->index].uart_port;
struct clps711x_port *s = dev_get_drvdata(port->dev);
u32 sysflg = 0;
uart_console_write(port, c, n, uart_clps711x_console_putchar);
/* Wait for transmitter to become empty */
do {
while (1) {
u32 sysflg = 0;
regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
} while (sysflg & SYSFLG_UBUSY);
if (!(sysflg & SYSFLG_UBUSY))
break;
cond_resched();
}
}
static int uart_clps711x_console_setup(struct console *co, char *options)

112
drivers/tty/serial/crisv10.c
View File

@ -286,7 +286,6 @@ static struct e100_serial rs_table[] = {
#endif
}, /* ttyS0 */
#ifndef CONFIG_SVINTO_SIM
{ .baud = DEF_BAUD,
.ioport = (unsigned char *)R_SERIAL1_CTRL,
.irq = 1U << 16, /* uses DMA 8 and 9 */
@ -447,7 +446,6 @@ static struct e100_serial rs_table[] = {
.dma_in_enabled = 0
#endif
} /* ttyS3 */
#endif
};
@ -1035,7 +1033,6 @@ cflag_to_etrax_baud(unsigned int cflag)
static inline void
e100_dtr(struct e100_serial *info, int set)
{
#ifndef CONFIG_SVINTO_SIM
unsigned char mask = e100_modem_pins[info->line].dtr_mask;
#ifdef SERIAL_DEBUG_IO
@ -1060,7 +1057,6 @@ e100_dtr(struct e100_serial *info, int set)
info->line, *e100_modem_pins[info->line].dtr_shadow,
E100_DTR_GET(info));
#endif
#endif
}
/* set = 0 means 3.3V on the pin, bitvalue: 0=active, 1=inactive
@ -1069,7 +1065,6 @@ e100_dtr(struct e100_serial *info, int set)
static inline void
e100_rts(struct e100_serial *info, int set)
{
#ifndef CONFIG_SVINTO_SIM
unsigned long flags;
local_irq_save(flags);
info->rx_ctrl &= ~E100_RTS_MASK;
@ -1079,7 +1074,6 @@ e100_rts(struct e100_serial *info, int set)
#ifdef SERIAL_DEBUG_IO
printk("ser%i rts %i\n", info->line, set);
#endif
#endif
}
@ -1087,7 +1081,6 @@ e100_rts(struct e100_serial *info, int set)
static inline void
e100_ri_out(struct e100_serial *info, int set)
{
#ifndef CONFIG_SVINTO_SIM
/* RI is active low */
{
unsigned char mask = e100_modem_pins[info->line].ri_mask;
@ -1099,12 +1092,10 @@ e100_ri_out(struct e100_serial *info, int set)
*e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow;
local_irq_restore(flags);
}
#endif
}
static inline void
e100_cd_out(struct e100_serial *info, int set)
{
#ifndef CONFIG_SVINTO_SIM
/* CD is active low */
{
unsigned char mask = e100_modem_pins[info->line].cd_mask;
@ -1116,27 +1107,22 @@ e100_cd_out(struct e100_serial *info, int set)
*e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow;
local_irq_restore(flags);
}
#endif
}
static inline void
e100_disable_rx(struct e100_serial *info)
{
#ifndef CONFIG_SVINTO_SIM
/* disable the receiver */
info->ioport[REG_REC_CTRL] =
(info->rx_ctrl &= ~IO_MASK(R_SERIAL0_REC_CTRL, rec_enable));
#endif
}
static inline void
e100_enable_rx(struct e100_serial *info)
{
#ifndef CONFIG_SVINTO_SIM
/* enable the receiver */
info->ioport[REG_REC_CTRL] =
(info->rx_ctrl |= IO_MASK(R_SERIAL0_REC_CTRL, rec_enable));
#endif
}
/* the rx DMA uses both the dma_descr and the dma_eop interrupts */
@ -1554,24 +1540,6 @@ transmit_chars_dma(struct e100_serial *info)
unsigned int c, sentl;
struct etrax_dma_descr *descr;
#ifdef CONFIG_SVINTO_SIM
/* This will output too little if tail is not 0 always since
* we don't reloop to send the other part. Anyway this SHOULD be a
* no-op - transmit_chars_dma would never really be called during sim
* since rs_write does not write into the xmit buffer then.
*/
if (info->xmit.tail)
printk("Error in serial.c:transmit_chars-dma(), tail!=0\n");
if (info->xmit.head != info->xmit.tail) {
SIMCOUT(info->xmit.buf + info->xmit.tail,
CIRC_CNT(info->xmit.head,
info->xmit.tail,
SERIAL_XMIT_SIZE));
info->xmit.head = info->xmit.tail; /* move back head */
info->tr_running = 0;
}
return;
#endif
/* acknowledge both dma_descr and dma_eop irq in R_DMA_CHx_CLR_INTR */
*info->oclrintradr =
IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) |
@ -1842,13 +1810,6 @@ static void receive_chars_dma(struct e100_serial *info)
struct tty_struct *tty;
unsigned char rstat;
#ifdef CONFIG_SVINTO_SIM
/* No receive in the simulator. Will probably be when the rest of
* the serial interface works, and this piece will just be removed.
*/
return;
#endif
/* Acknowledge both dma_descr and dma_eop irq in R_DMA_CHx_CLR_INTR */
*info->iclrintradr =
IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) |
@ -1934,12 +1895,6 @@ static int start_recv_dma(struct e100_serial *info)
static void
start_receive(struct e100_serial *info)
{
#ifdef CONFIG_SVINTO_SIM
/* No receive in the simulator. Will probably be when the rest of
* the serial interface works, and this piece will just be removed.
*/
return;
#endif
if (info->uses_dma_in) {
/* reset the input dma channel to be sure it works */
@ -1972,17 +1927,6 @@ tr_interrupt(int irq, void *dev_id)
int i;
int handled = 0;
#ifdef CONFIG_SVINTO_SIM
/* No receive in the simulator. Will probably be when the rest of
* the serial interface works, and this piece will just be removed.
*/
{
const char *s = "What? tr_interrupt in simulator??\n";
SIMCOUT(s,strlen(s));
}
return IRQ_HANDLED;
#endif
/* find out the line that caused this irq and get it from rs_table */
ireg = *R_IRQ_MASK2_RD; /* get the active irq bits for the dma channels */
@ -2021,17 +1965,6 @@ rec_interrupt(int irq, void *dev_id)
int i;
int handled = 0;
#ifdef CONFIG_SVINTO_SIM
/* No receive in the simulator. Will probably be when the rest of
* the serial interface works, and this piece will just be removed.
*/
{
const char *s = "What? rec_interrupt in simulator??\n";
SIMCOUT(s,strlen(s));
}
return IRQ_HANDLED;
#endif
/* find out the line that caused this irq and get it from rs_table */
ireg = *R_IRQ_MASK2_RD; /* get the active irq bits for the dma channels */
@ -2173,10 +2106,6 @@ timed_flush_handler(unsigned long ptr)
struct e100_serial *info;
int i;
#ifdef CONFIG_SVINTO_SIM
return;
#endif
for (i = 0; i < NR_PORTS; i++) {
info = rs_table + i;
if (info->uses_dma_in)
@ -2729,25 +2658,6 @@ startup(struct e100_serial * info)
printk("starting up ttyS%d (xmit_buf 0x%p)...\n", info->line, info->xmit.buf);
#endif
#ifdef CONFIG_SVINTO_SIM
/* Bits and pieces collected from below. Better to have them
in one ifdef:ed clause than to mix in a lot of ifdefs,
right? */
if (info->port.tty)
clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
info->xmit.head = info->xmit.tail = 0;
info->first_recv_buffer = info->last_recv_buffer = NULL;
info->recv_cnt = info->max_recv_cnt = 0;
for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++)
info->rec_descr[i].buf = NULL;
/* No real action in the simulator, but may set info important
to ioctl. */
change_speed(info);
#else
/*
* Clear the FIFO buffers and disable them
* (they will be reenabled in change_speed())
@ -2837,8 +2747,6 @@ startup(struct e100_serial * info)
e100_rts(info, 1);
e100_dtr(info, 1);
#endif /* CONFIG_SVINTO_SIM */
info->port.flags |= ASYNC_INITIALIZED;
local_irq_restore(flags);
@ -2857,7 +2765,6 @@ shutdown(struct e100_serial * info)
struct etrax_recv_buffer *buffer;
int i;
#ifndef CONFIG_SVINTO_SIM
/* shut down the transmitter and receiver */
DFLOW(DEBUG_LOG(info->line, "shutdown %i\n", info->line));
e100_disable_rx(info);
@ -2882,8 +2789,6 @@ shutdown(struct e100_serial * info)
info->tr_running = 0;
}
#endif /* CONFIG_SVINTO_SIM */
if (!(info->port.flags & ASYNC_INITIALIZED))
return;
@ -2995,17 +2900,12 @@ change_speed(struct e100_serial *info)
IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, normal);
r_alt_ser_baudrate_shadow &= ~mask;
r_alt_ser_baudrate_shadow |= (alt_source << (info->line*8));
#ifndef CONFIG_SVINTO_SIM
*R_ALT_SER_BAUDRATE = r_alt_ser_baudrate_shadow;
#endif /* CONFIG_SVINTO_SIM */
info->baud = cflag_to_baud(cflag);
#ifndef CONFIG_SVINTO_SIM
info->ioport[REG_BAUD] = cflag_to_etrax_baud(cflag);
#endif /* CONFIG_SVINTO_SIM */
}
#ifndef CONFIG_SVINTO_SIM
/* start with default settings and then fill in changes */
local_irq_save(flags);
/* 8 bit, no/even parity */
@ -3073,7 +2973,6 @@ change_speed(struct e100_serial *info)
*((unsigned long *)&info->ioport[REG_XOFF]) = xoff;
local_irq_restore(flags);
#endif /* !CONFIG_SVINTO_SIM */
update_char_time(info);
@ -3122,11 +3021,6 @@ static int rs_raw_write(struct tty_struct *tty,
count, info->ioport[REG_STATUS]);
#endif
#ifdef CONFIG_SVINTO_SIM
/* Really simple. The output is here and now. */
SIMCOUT(buf, count);
return count;
#endif
local_save_flags(flags);
DFLOW(DEBUG_LOG(info->line, "write count %i ", count));
DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty)));
@ -3463,7 +3357,6 @@ static int
get_lsr_info(struct e100_serial * info, unsigned int *value)
{
unsigned int result = TIOCSER_TEMT;
#ifndef CONFIG_SVINTO_SIM
unsigned long curr_time = jiffies;
unsigned long curr_time_usec = GET_JIFFIES_USEC();
unsigned long elapsed_usec =
@ -3474,7 +3367,6 @@ get_lsr_info(struct e100_serial * info, unsigned int *value)
elapsed_usec < 2*info->char_time_usec) {
result = 0;
}
#endif
if (copy_to_user(value, &result, sizeof(int)))
return -EFAULT;
@ -3804,7 +3696,6 @@ rs_close(struct tty_struct *tty, struct file * filp)
e100_disable_serial_data_irq(info);
#endif
#ifndef CONFIG_SVINTO_SIM
e100_disable_rx(info);
e100_disable_rx_irq(info);
@ -3816,7 +3707,6 @@ rs_close(struct tty_struct *tty, struct file * filp)
*/
rs_wait_until_sent(tty, HZ);
}
#endif
shutdown(info);
rs_flush_buffer(tty);
@ -4479,7 +4369,6 @@ static int __init rs_init(void)
fast_timer_init();
#endif
#ifndef CONFIG_SVINTO_SIM
#ifndef CONFIG_ETRAX_KGDB
/* Not needed in simulator. May only complicate stuff. */
/* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */
@ -4489,7 +4378,6 @@ static int __init rs_init(void)
panic("%s: Failed to request irq8", __func__);
#endif
#endif /* CONFIG_SVINTO_SIM */
return 0;
}

3
drivers/tty/serial/efm32-uart.c
View File

@ -671,6 +671,9 @@ static int efm32_uart_probe_dt(struct platform_device *pdev,
if (!np)
return 1;
ret = of_property_read_u32(np, "efm32,location", &location);
if (ret)
/* fall back to old and (wrongly) generic property "location" */
ret = of_property_read_u32(np, "location", &location);
if (!ret) {
if (location > 5) {

422
drivers/tty/serial/fsl_lpuart.c
View File

@ -13,14 +13,19 @@
#define SUPPORT_SYSRQ
#endif
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/console.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/dmapool.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/console.h>
#include <linux/of_dma.h>
#include <linux/serial_core.h>
#include <linux/slab.h>
#include <linux/tty_flip.h>
/* All registers are 8-bit width */
@ -112,6 +117,10 @@
#define UARTSFIFO_TXOF 0x02
#define UARTSFIFO_RXUF 0x01
#define DMA_MAXBURST 16
#define DMA_MAXBURST_MASK (DMA_MAXBURST - 1)
#define FSL_UART_RX_DMA_BUFFER_SIZE 64
#define DRIVER_NAME "fsl-lpuart"
#define DEV_NAME "ttyLP"
#define UART_NR 6
@ -121,6 +130,24 @@ struct lpuart_port {
struct clk *clk;
unsigned int txfifo_size;
unsigned int rxfifo_size;
bool lpuart_dma_use;
struct dma_chan *dma_tx_chan;
struct dma_chan *dma_rx_chan;
struct dma_async_tx_descriptor *dma_tx_desc;
struct dma_async_tx_descriptor *dma_rx_desc;
dma_addr_t dma_tx_buf_bus;
dma_addr_t dma_rx_buf_bus;
dma_cookie_t dma_tx_cookie;
dma_cookie_t dma_rx_cookie;
unsigned char *dma_tx_buf_virt;
unsigned char *dma_rx_buf_virt;
unsigned int dma_tx_bytes;
unsigned int dma_rx_bytes;
int dma_tx_in_progress;
int dma_rx_in_progress;
unsigned int dma_rx_timeout;
struct timer_list lpuart_timer;
};
static struct of_device_id lpuart_dt_ids[] = {
@ -131,6 +158,10 @@ static struct of_device_id lpuart_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
/* Forward declare this for the dma callbacks*/
static void lpuart_dma_tx_complete(void *arg);
static void lpuart_dma_rx_complete(void *arg);
static void lpuart_stop_tx(struct uart_port *port)
{
unsigned char temp;
@ -152,6 +183,210 @@ static void lpuart_enable_ms(struct uart_port *port)
{
}
static void lpuart_copy_rx_to_tty(struct lpuart_port *sport,
struct tty_port *tty, int count)
{
int copied;
sport->port.icount.rx += count;
if (!tty) {
dev_err(sport->port.dev, "No tty port\n");
return;
}
dma_sync_single_for_cpu(sport->port.dev, sport->dma_rx_buf_bus,
FSL_UART_RX_DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
copied = tty_insert_flip_string(tty,
((unsigned char *)(sport->dma_rx_buf_virt)), count);
if (copied != count) {
WARN_ON(1);
dev_err(sport->port.dev, "RxData copy to tty layer failed\n");
}
dma_sync_single_for_device(sport->port.dev, sport->dma_rx_buf_bus,
FSL_UART_RX_DMA_BUFFER_SIZE, DMA_TO_DEVICE);
}
static void lpuart_pio_tx(struct lpuart_port *sport)
{
struct circ_buf *xmit = &sport->port.state->xmit;
unsigned long flags;
spin_lock_irqsave(&sport->port.lock, flags);
while (!uart_circ_empty(xmit) &&
readb(sport->port.membase + UARTTCFIFO) < sport->txfifo_size) {
writeb(xmit->buf[xmit->tail], sport->port.membase + UARTDR);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
sport->port.icount.tx++;
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&sport->port);
if (uart_circ_empty(xmit))
writeb(readb(sport->port.membase + UARTCR5) | UARTCR5_TDMAS,
sport->port.membase + UARTCR5);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static int lpuart_dma_tx(struct lpuart_port *sport, unsigned long count)
{
struct circ_buf *xmit = &sport->port.state->xmit;
dma_addr_t tx_bus_addr;
dma_sync_single_for_device(sport->port.dev, sport->dma_tx_buf_bus,
UART_XMIT_SIZE, DMA_TO_DEVICE);
sport->dma_tx_bytes = count & ~(DMA_MAXBURST_MASK);
tx_bus_addr = sport->dma_tx_buf_bus + xmit->tail;
sport->dma_tx_desc = dmaengine_prep_slave_single(sport->dma_tx_chan,
tx_bus_addr, sport->dma_tx_bytes,
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
if (!sport->dma_tx_desc) {
dev_err(sport->port.dev, "Not able to get desc for tx\n");
return -EIO;
}
sport->dma_tx_desc->callback = lpuart_dma_tx_complete;
sport->dma_tx_desc->callback_param = sport;
sport->dma_tx_in_progress = 1;
sport->dma_tx_cookie = dmaengine_submit(sport->dma_tx_desc);
dma_async_issue_pending(sport->dma_tx_chan);
return 0;
}
static void lpuart_prepare_tx(struct lpuart_port *sport)
{
struct circ_buf *xmit = &sport->port.state->xmit;
unsigned long count = CIRC_CNT_TO_END(xmit->head,
xmit->tail, UART_XMIT_SIZE);
if (!count)
return;
if (count < DMA_MAXBURST)
writeb(readb(sport->port.membase + UARTCR5) & ~UARTCR5_TDMAS,
sport->port.membase + UARTCR5);
else {
writeb(readb(sport->port.membase + UARTCR5) | UARTCR5_TDMAS,
sport->port.membase + UARTCR5);
lpuart_dma_tx(sport, count);
}
}
static void lpuart_dma_tx_complete(void *arg)
{
struct lpuart_port *sport = arg;
struct circ_buf *xmit = &sport->port.state->xmit;
unsigned long flags;
async_tx_ack(sport->dma_tx_desc);
spin_lock_irqsave(&sport->port.lock, flags);
xmit->tail = (xmit->tail + sport->dma_tx_bytes) & (UART_XMIT_SIZE - 1);
sport->dma_tx_in_progress = 0;
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&sport->port);
lpuart_prepare_tx(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static int lpuart_dma_rx(struct lpuart_port *sport)
{
dma_sync_single_for_device(sport->port.dev, sport->dma_rx_buf_bus,
FSL_UART_RX_DMA_BUFFER_SIZE, DMA_TO_DEVICE);
sport->dma_rx_desc = dmaengine_prep_slave_single(sport->dma_rx_chan,
sport->dma_rx_buf_bus, FSL_UART_RX_DMA_BUFFER_SIZE,
DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);
if (!sport->dma_rx_desc) {
dev_err(sport->port.dev, "Not able to get desc for rx\n");
return -EIO;
}
sport->dma_rx_desc->callback = lpuart_dma_rx_complete;
sport->dma_rx_desc->callback_param = sport;
sport->dma_rx_in_progress = 1;
sport->dma_rx_cookie = dmaengine_submit(sport->dma_rx_desc);
dma_async_issue_pending(sport->dma_rx_chan);
return 0;
}
static void lpuart_dma_rx_complete(void *arg)
{
struct lpuart_port *sport = arg;
struct tty_port *port = &sport->port.state->port;
unsigned long flags;
async_tx_ack(sport->dma_rx_desc);
spin_lock_irqsave(&sport->port.lock, flags);
sport->dma_rx_in_progress = 0;
lpuart_copy_rx_to_tty(sport, port, FSL_UART_RX_DMA_BUFFER_SIZE);
tty_flip_buffer_push(port);
lpuart_dma_rx(sport);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static void lpuart_timer_func(unsigned long data)
{
struct lpuart_port *sport = (struct lpuart_port *)data;
struct tty_port *port = &sport->port.state->port;
struct dma_tx_state state;
unsigned long flags;
unsigned char temp;
int count;
del_timer(&sport->lpuart_timer);
dmaengine_pause(sport->dma_rx_chan);
dmaengine_tx_status(sport->dma_rx_chan, sport->dma_rx_cookie, &state);
dmaengine_terminate_all(sport->dma_rx_chan);
count = FSL_UART_RX_DMA_BUFFER_SIZE - state.residue;
async_tx_ack(sport->dma_rx_desc);
spin_lock_irqsave(&sport->port.lock, flags);
sport->dma_rx_in_progress = 0;
lpuart_copy_rx_to_tty(sport, port, count);
tty_flip_buffer_push(port);
temp = readb(sport->port.membase + UARTCR5);
writeb(temp & ~UARTCR5_RDMAS, sport->port.membase + UARTCR5);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static inline void lpuart_prepare_rx(struct lpuart_port *sport)
{
unsigned long flags;
unsigned char temp;
spin_lock_irqsave(&sport->port.lock, flags);
init_timer(&sport->lpuart_timer);
sport->lpuart_timer.function = lpuart_timer_func;
sport->lpuart_timer.data = (unsigned long)sport;
sport->lpuart_timer.expires = jiffies + sport->dma_rx_timeout;
add_timer(&sport->lpuart_timer);
lpuart_dma_rx(sport);
temp = readb(sport->port.membase + UARTCR5);
writeb(temp | UARTCR5_RDMAS, sport->port.membase + UARTCR5);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static inline void lpuart_transmit_buffer(struct lpuart_port *sport)
{
struct circ_buf *xmit = &sport->port.state->xmit;
@ -172,14 +407,21 @@ static inline void lpuart_transmit_buffer(struct lpuart_port *sport)
static void lpuart_start_tx(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
struct lpuart_port *sport = container_of(port,
struct lpuart_port, port);
struct circ_buf *xmit = &sport->port.state->xmit;
unsigned char temp;
temp = readb(port->membase + UARTCR2);
writeb(temp | UARTCR2_TIE, port->membase + UARTCR2);
if (sport->lpuart_dma_use) {
if (!uart_circ_empty(xmit) && !sport->dma_tx_in_progress)
lpuart_prepare_tx(sport);
} else {
if (readb(port->membase + UARTSR1) & UARTSR1_TDRE)
lpuart_transmit_buffer(sport);
}
}
static irqreturn_t lpuart_txint(int irq, void *dev_id)
@ -279,12 +521,19 @@ static irqreturn_t lpuart_int(int irq, void *dev_id)
sts = readb(sport->port.membase + UARTSR1);
if (sts & UARTSR1_RDRF)
if (sts & UARTSR1_RDRF) {
if (sport->lpuart_dma_use)
lpuart_prepare_rx(sport);
else
lpuart_rxint(irq, dev_id);
}
if (sts & UARTSR1_TDRE &&
!(readb(sport->port.membase + UARTCR5) & UARTCR5_TDMAS))
!(readb(sport->port.membase + UARTCR5) & UARTCR5_TDMAS)) {
if (sport->lpuart_dma_use)
lpuart_pio_tx(sport);
else
lpuart_txint(irq, dev_id);
}
return IRQ_HANDLED;
}
@ -366,13 +615,156 @@ static void lpuart_setup_watermark(struct lpuart_port *sport)
writeb(UARTCFIFO_TXFLUSH | UARTCFIFO_RXFLUSH,
sport->port.membase + UARTCFIFO);
writeb(2, sport->port.membase + UARTTWFIFO);
writeb(0, sport->port.membase + UARTTWFIFO);
writeb(1, sport->port.membase + UARTRWFIFO);
/* Restore cr2 */
writeb(cr2_saved, sport->port.membase + UARTCR2);
}
static int lpuart_dma_tx_request(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port,
struct lpuart_port, port);
struct dma_chan *tx_chan;
struct dma_slave_config dma_tx_sconfig;
dma_addr_t dma_bus;
unsigned char *dma_buf;
int ret;
tx_chan = dma_request_slave_channel(sport->port.dev, "tx");
if (!tx_chan) {
dev_err(sport->port.dev, "Dma tx channel request failed!\n");
return -ENODEV;
}
dma_bus = dma_map_single(tx_chan->device->dev,
sport->port.state->xmit.buf,
UART_XMIT_SIZE, DMA_TO_DEVICE);
if (dma_mapping_error(tx_chan->device->dev, dma_bus)) {
dev_err(sport->port.dev, "dma_map_single tx failed\n");
dma_release_channel(tx_chan);
return -ENOMEM;
}
dma_buf = sport->port.state->xmit.buf;
dma_tx_sconfig.dst_addr = sport->port.mapbase + UARTDR;
dma_tx_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma_tx_sconfig.dst_maxburst = DMA_MAXBURST;
dma_tx_sconfig.direction = DMA_MEM_TO_DEV;
ret = dmaengine_slave_config(tx_chan, &dma_tx_sconfig);
if (ret < 0) {
dev_err(sport->port.dev,
"Dma slave config failed, err = %d\n", ret);
dma_release_channel(tx_chan);
return ret;
}
sport->dma_tx_chan = tx_chan;
sport->dma_tx_buf_virt = dma_buf;
sport->dma_tx_buf_bus = dma_bus;
sport->dma_tx_in_progress = 0;
return 0;
}
static int lpuart_dma_rx_request(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port,
struct lpuart_port, port);
struct dma_chan *rx_chan;
struct dma_slave_config dma_rx_sconfig;
dma_addr_t dma_bus;
unsigned char *dma_buf;
int ret;
rx_chan = dma_request_slave_channel(sport->port.dev, "rx");
if (!rx_chan) {
dev_err(sport->port.dev, "Dma rx channel request failed!\n");
return -ENODEV;
}
dma_buf = devm_kzalloc(sport->port.dev,
FSL_UART_RX_DMA_BUFFER_SIZE, GFP_KERNEL);
if (!dma_buf) {
dev_err(sport->port.dev, "Dma rx alloc failed\n");
dma_release_channel(rx_chan);
return -ENOMEM;
}
dma_bus = dma_map_single(rx_chan->device->dev, dma_buf,
FSL_UART_RX_DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
if (dma_mapping_error(rx_chan->device->dev, dma_bus)) {
dev_err(sport->port.dev, "dma_map_single rx failed\n");
dma_release_channel(rx_chan);
return -ENOMEM;
}
dma_rx_sconfig.src_addr = sport->port.mapbase + UARTDR;
dma_rx_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
dma_rx_sconfig.src_maxburst = 1;
dma_rx_sconfig.direction = DMA_DEV_TO_MEM;
ret = dmaengine_slave_config(rx_chan, &dma_rx_sconfig);
if (ret < 0) {
dev_err(sport->port.dev,
"Dma slave config failed, err = %d\n", ret);
dma_release_channel(rx_chan);
return ret;
}
sport->dma_rx_chan = rx_chan;
sport->dma_rx_buf_virt = dma_buf;
sport->dma_rx_buf_bus = dma_bus;
sport->dma_rx_in_progress = 0;
sport->dma_rx_timeout = (sport->port.timeout - HZ / 50) *
FSL_UART_RX_DMA_BUFFER_SIZE * 3 /
sport->rxfifo_size / 2;
if (sport->dma_rx_timeout < msecs_to_jiffies(20))
sport->dma_rx_timeout = msecs_to_jiffies(20);
return 0;
}
static void lpuart_dma_tx_free(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port,
struct lpuart_port, port);
struct dma_chan *dma_chan;
dma_unmap_single(sport->port.dev, sport->dma_tx_buf_bus,
UART_XMIT_SIZE, DMA_TO_DEVICE);
dma_chan = sport->dma_tx_chan;
sport->dma_tx_chan = NULL;
sport->dma_tx_buf_bus = 0;
sport->dma_tx_buf_virt = NULL;
dma_release_channel(dma_chan);
}
static void lpuart_dma_rx_free(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port,
struct lpuart_port, port);
struct dma_chan *dma_chan;
dma_unmap_single(sport->port.dev, sport->dma_rx_buf_bus,
FSL_UART_RX_DMA_BUFFER_SIZE, DMA_FROM_DEVICE);
dma_chan = sport->dma_rx_chan;
sport->dma_rx_chan = NULL;
sport->dma_rx_buf_bus = 0;
sport->dma_rx_buf_virt = NULL;
dma_release_channel(dma_chan);
}
static int lpuart_startup(struct uart_port *port)
{
struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
@ -380,6 +772,15 @@ static int lpuart_startup(struct uart_port *port)
unsigned long flags;
unsigned char temp;
/*whether use dma support by dma request results*/
if (lpuart_dma_tx_request(port) || lpuart_dma_rx_request(port)) {
sport->lpuart_dma_use = false;
} else {
sport->lpuart_dma_use = true;
temp = readb(port->membase + UARTCR5);
writeb(temp | UARTCR5_TDMAS, port->membase + UARTCR5);
}
ret = devm_request_irq(port->dev, port->irq, lpuart_int, 0,
DRIVER_NAME, sport);
if (ret)
@ -414,6 +815,11 @@ static void lpuart_shutdown(struct uart_port *port)
spin_unlock_irqrestore(&port->lock, flags);
devm_free_irq(port->dev, port->irq, sport);
if (sport->lpuart_dma_use) {
lpuart_dma_tx_free(port);
lpuart_dma_rx_free(port);
}
}
static void

80
drivers/tty/serial/imx.c
View File

@ -496,7 +496,6 @@ static void dma_tx_callback(void *data)
dev_dbg(sport->port.dev, "we finish the TX DMA.\n");
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&sport->port);
if (waitqueue_active(&sport->dma_wait)) {
@ -1117,25 +1116,25 @@ static int imx_startup(struct uart_port *port)
*/
if (sport->txirq > 0) {
retval = request_irq(sport->rxirq, imx_rxint, 0,
DRIVER_NAME, sport);
dev_name(port->dev), sport);
if (retval)
goto error_out1;
retval = request_irq(sport->txirq, imx_txint, 0,
DRIVER_NAME, sport);
dev_name(port->dev), sport);
if (retval)
goto error_out2;
/* do not use RTS IRQ on IrDA */
if (!USE_IRDA(sport)) {
retval = request_irq(sport->rtsirq, imx_rtsint, 0,
DRIVER_NAME, sport);
dev_name(port->dev), sport);
if (retval)
goto error_out3;
}
} else {
retval = request_irq(sport->port.irq, imx_int, 0,
DRIVER_NAME, sport);
dev_name(port->dev), sport);
if (retval) {
free_irq(sport->port.irq, sport);
goto error_out1;
@ -1469,36 +1468,6 @@ static const char *imx_type(struct uart_port *port)
return sport->port.type == PORT_IMX ? "IMX" : NULL;
}
/*
* Release the memory region(s) being used by 'port'.
*/
static void imx_release_port(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
struct resource *mmres;
mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(mmres->start, resource_size(mmres));
}
/*
* Request the memory region(s) being used by 'port'.
*/
static int imx_request_port(struct uart_port *port)
{
struct platform_device *pdev = to_platform_device(port->dev);
struct resource *mmres;
void *ret;
mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mmres)
return -ENODEV;
ret = request_mem_region(mmres->start, resource_size(mmres), "imx-uart");
return ret ? 0 : -EBUSY;
}
/*
* Configure/autoconfigure the port.
*/
@ -1506,8 +1475,7 @@ static void imx_config_port(struct uart_port *port, int flags)
{
struct imx_port *sport = (struct imx_port *)port;
if (flags & UART_CONFIG_TYPE &&
imx_request_port(&sport->port) == 0)
if (flags & UART_CONFIG_TYPE)
sport->port.type = PORT_IMX;
}
@ -1617,8 +1585,6 @@ static struct uart_ops imx_pops = {
.flush_buffer = imx_flush_buffer,
.set_termios = imx_set_termios,
.type = imx_type,
.release_port = imx_release_port,
.request_port = imx_request_port,
.config_port = imx_config_port,
.verify_port = imx_verify_port,
#if defined(CONFIG_CONSOLE_POLL)
@ -1935,7 +1901,6 @@ static void serial_imx_probe_pdata(struct imx_port *sport,
static int serial_imx_probe(struct platform_device *pdev)
{
struct imx_port *sport;
struct imxuart_platform_data *pdata;
void __iomem *base;
int ret = 0;
struct resource *res;
@ -1951,12 +1916,9 @@ static int serial_imx_probe(struct platform_device *pdev)
return ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENODEV;
base = devm_ioremap(&pdev->dev, res->start, PAGE_SIZE);
if (!base)
return -ENOMEM;
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
sport->port.dev = &pdev->dev;
sport->port.mapbase = res->start;
@ -1992,38 +1954,16 @@ static int serial_imx_probe(struct platform_device *pdev)
imx_ports[sport->port.line] = sport;
pdata = dev_get_platdata(&pdev->dev);
if (pdata && pdata->init) {
ret = pdata->init(pdev);
if (ret)
return ret;
}
ret = uart_add_one_port(&imx_reg, &sport->port);
if (ret)
goto deinit;
platform_set_drvdata(pdev, sport);
return 0;
deinit:
if (pdata && pdata->exit)
pdata->exit(pdev);
return ret;
return uart_add_one_port(&imx_reg, &sport->port);
}
static int serial_imx_remove(struct platform_device *pdev)
{
struct imxuart_platform_data *pdata;
struct imx_port *sport = platform_get_drvdata(pdev);
pdata = dev_get_platdata(&pdev->dev);
uart_remove_one_port(&imx_reg, &sport->port);
if (pdata && pdata->exit)
pdata->exit(pdev);
return 0;
return uart_remove_one_port(&imx_reg, &sport->port);
}
static struct platform_driver serial_imx_driver = {

403
drivers/tty/serial/max310x.c
View File

@ -1,7 +1,7 @@
/*
* Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver
*
* Copyright (C) 2012-2013 Alexander Shiyan <shc_work@mail.ru>
* Copyright (C) 2012-2014 Alexander Shiyan <shc_work@mail.ru>
*
* Based on max3100.c, by Christian Pellegrin <chripell@evolware.org>
* Based on max3110.c, by Feng Tang <feng.tang@intel.com>
@ -13,19 +13,21 @@
* (at your option) any later version.
*/
#include <linux/module.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/regmap.h>
#include <linux/gpio.h>
#include <linux/spi/spi.h>
#include <linux/platform_data/max310x.h>
#include <linux/uaccess.h>
#define MAX310X_NAME "max310x"
#define MAX310X_MAJOR 204
@ -161,10 +163,6 @@
/* IRDA register bits */
#define MAX310X_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */
#define MAX310X_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */
#define MAX310X_IRDA_SHORTIR_BIT (1 << 2) /* Short SIR mode enable */
#define MAX310X_IRDA_MIR_BIT (1 << 3) /* MIR mode enable */
#define MAX310X_IRDA_RXINV_BIT (1 << 4) /* RX logic inversion enable */
#define MAX310X_IRDA_TXINV_BIT (1 << 5) /* TX logic inversion enable */
/* Flow control trigger level register masks */
#define MAX310X_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */
@ -220,26 +218,6 @@
* XOFF2
*/
/* GPIO configuration register bits */
#define MAX310X_GPIOCFG_GP0OUT_BIT (1 << 0) /* GPIO 0 output enable */
#define MAX310X_GPIOCFG_GP1OUT_BIT (1 << 1) /* GPIO 1 output enable */
#define MAX310X_GPIOCFG_GP2OUT_BIT (1 << 2) /* GPIO 2 output enable */
#define MAX310X_GPIOCFG_GP3OUT_BIT (1 << 3) /* GPIO 3 output enable */
#define MAX310X_GPIOCFG_GP0OD_BIT (1 << 4) /* GPIO 0 open-drain enable */
#define MAX310X_GPIOCFG_GP1OD_BIT (1 << 5) /* GPIO 1 open-drain enable */
#define MAX310X_GPIOCFG_GP2OD_BIT (1 << 6) /* GPIO 2 open-drain enable */
#define MAX310X_GPIOCFG_GP3OD_BIT (1 << 7) /* GPIO 3 open-drain enable */
/* GPIO DATA register bits */
#define MAX310X_GPIODATA_GP0OUT_BIT (1 << 0) /* GPIO 0 output value */
#define MAX310X_GPIODATA_GP1OUT_BIT (1 << 1) /* GPIO 1 output value */
#define MAX310X_GPIODATA_GP2OUT_BIT (1 << 2) /* GPIO 2 output value */
#define MAX310X_GPIODATA_GP3OUT_BIT (1 << 3) /* GPIO 3 output value */
#define MAX310X_GPIODATA_GP0IN_BIT (1 << 4) /* GPIO 0 input value */
#define MAX310X_GPIODATA_GP1IN_BIT (1 << 5) /* GPIO 1 input value */
#define MAX310X_GPIODATA_GP2IN_BIT (1 << 6) /* GPIO 2 input value */
#define MAX310X_GPIODATA_GP3IN_BIT (1 << 7) /* GPIO 3 input value */
/* PLL configuration register masks */
#define MAX310X_PLLCFG_PREDIV_MASK (0x3f) /* PLL predivision value */
#define MAX310X_PLLCFG_PLLFACTOR_MASK (0xc0) /* PLL multiplication factor */
@ -283,16 +261,15 @@ struct max310x_devtype {
struct max310x_one {
struct uart_port port;
struct work_struct tx_work;
struct work_struct md_work;
};
struct max310x_port {
struct uart_driver uart;
struct max310x_devtype *devtype;
struct regmap *regmap;
struct regmap_config regcfg;
struct mutex mutex;
struct max310x_pdata *pdata;
int gpio_used;
struct clk *clk;
#ifdef CONFIG_GPIOLIB
struct gpio_chip gpio;
#endif
@ -504,25 +481,33 @@ static bool max310x_reg_precious(struct device *dev, unsigned int reg)
return false;
}
static void max310x_set_baud(struct uart_port *port, int baud)
static int max310x_set_baud(struct uart_port *port, int baud)
{
unsigned int mode = 0, div = port->uartclk / baud;
unsigned int mode = 0, clk = port->uartclk, div = clk / baud;
if (!(div / 16)) {
/* Check for minimal value for divider */
if (div < 16)
div = 16;
if (clk % baud && (div / 16) < 0x8000) {
/* Mode x2 */
mode = MAX310X_BRGCFG_2XMODE_BIT;
div = (port->uartclk * 2) / baud;
}
clk = port->uartclk * 2;
div = clk / baud;
if (!(div / 16)) {
if (clk % baud && (div / 16) < 0x8000) {
/* Mode x4 */
mode = MAX310X_BRGCFG_4XMODE_BIT;
div = (port->uartclk * 4) / baud;
clk = port->uartclk * 4;
div = clk / baud;
}
}
max310x_port_write(port, MAX310X_BRGDIVMSB_REG, (div / 16) >> 8);
max310x_port_write(port, MAX310X_BRGDIVLSB_REG, div / 16);
max310x_port_write(port, MAX310X_BRGCFG_REG, (div % 16) | mode);
return DIV_ROUND_CLOSEST(clk, div);
}
static int max310x_update_best_err(unsigned long f, long *besterr)
@ -538,18 +523,19 @@ static int max310x_update_best_err(unsigned long f, long *besterr)
return 1;
}
static int max310x_set_ref_clk(struct max310x_port *s)
static int max310x_set_ref_clk(struct max310x_port *s, unsigned long freq,
bool xtal)
{
unsigned int div, clksrc, pllcfg = 0;
long besterr = -1;
unsigned long fdiv, fmul, bestfreq = s->pdata->frequency;
unsigned long fdiv, fmul, bestfreq = freq;
/* First, update error without PLL */
max310x_update_best_err(s->pdata->frequency, &besterr);
max310x_update_best_err(freq, &besterr);
/* Try all possible PLL dividers */
for (div = 1; (div <= 63) && besterr; div++) {
fdiv = DIV_ROUND_CLOSEST(s->pdata->frequency, div);
fdiv = DIV_ROUND_CLOSEST(freq, div);
/* Try multiplier 6 */
fmul = fdiv * 6;
@ -582,10 +568,7 @@ static int max310x_set_ref_clk(struct max310x_port *s)
}
/* Configure clock source */
if (s->pdata->driver_flags & MAX310X_EXT_CLK)
clksrc = MAX310X_CLKSRC_EXTCLK_BIT;
else
clksrc = MAX310X_CLKSRC_CRYST_BIT;
clksrc = xtal ? MAX310X_CLKSRC_CRYST_BIT : MAX310X_CLKSRC_EXTCLK_BIT;
/* Configure PLL */
if (pllcfg) {
@ -597,7 +580,7 @@ static int max310x_set_ref_clk(struct max310x_port *s)
regmap_write(s->regmap, MAX310X_CLKSRC_REG, clksrc);
/* Wait for crystal */
if (pllcfg && !(s->pdata->driver_flags & MAX310X_EXT_CLK))
if (pllcfg && xtal)
msleep(10);
return (int)bestfreq;
@ -782,11 +765,21 @@ static unsigned int max310x_get_mctrl(struct uart_port *port)
return TIOCM_DSR | TIOCM_CAR;
}
static void max310x_md_proc(struct work_struct *ws)
{
struct max310x_one *one = container_of(ws, struct max310x_one, md_work);
max310x_port_update(&one->port, MAX310X_MODE2_REG,
MAX310X_MODE2_LOOPBACK_BIT,
(one->port.mctrl & TIOCM_LOOP) ?
MAX310X_MODE2_LOOPBACK_BIT : 0);
}
static void max310x_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
/* DCD and DSR are not wired and CTS/RTS is hadnled automatically
* so do nothing
*/
struct max310x_one *one = container_of(port, struct max310x_one, port);
schedule_work(&one->md_work);
}
static void max310x_break_ctl(struct uart_port *port, int break_state)
@ -875,40 +868,76 @@ static void max310x_set_termios(struct uart_port *port,
port->uartclk / 4);
/* Setup baudrate generator */
max310x_set_baud(port, baud);
baud = max310x_set_baud(port, baud);
/* Update timeout according to new baud rate */
uart_update_timeout(port, termios->c_cflag, baud);
}
static int max310x_ioctl(struct uart_port *port, unsigned int cmd,
unsigned long arg)
{
#if defined(TIOCSRS485) && defined(TIOCGRS485)
struct serial_rs485 rs485;
unsigned int val;
switch (cmd) {
case TIOCSRS485:
if (copy_from_user(&rs485, (void __user *)arg, sizeof(rs485)))
return -EFAULT;
if (rs485.delay_rts_before_send > 0x0f ||
rs485.delay_rts_after_send > 0x0f)
return -ERANGE;
val = (rs485.delay_rts_before_send << 4) |
rs485.delay_rts_after_send;
max310x_port_write(port, MAX310X_HDPIXDELAY_REG, val);
if (rs485.flags & SER_RS485_ENABLED) {
max310x_port_update(port, MAX310X_MODE1_REG,
MAX310X_MODE1_TRNSCVCTRL_BIT,
MAX310X_MODE1_TRNSCVCTRL_BIT);
max310x_port_update(port, MAX310X_MODE2_REG,
MAX310X_MODE2_ECHOSUPR_BIT,
MAX310X_MODE2_ECHOSUPR_BIT);
} else {
max310x_port_update(port, MAX310X_MODE1_REG,
MAX310X_MODE1_TRNSCVCTRL_BIT, 0);
max310x_port_update(port, MAX310X_MODE2_REG,
MAX310X_MODE2_ECHOSUPR_BIT, 0);
}
return 0;
case TIOCGRS485:
memset(&rs485, 0, sizeof(rs485));
val = max310x_port_read(port, MAX310X_MODE1_REG);
rs485.flags = (val & MAX310X_MODE1_TRNSCVCTRL_BIT) ?
SER_RS485_ENABLED : 0;
rs485.flags |= SER_RS485_RTS_ON_SEND;
val = max310x_port_read(port, MAX310X_HDPIXDELAY_REG);
rs485.delay_rts_before_send = val >> 4;
rs485.delay_rts_after_send = val & 0x0f;
if (copy_to_user((void __user *)arg, &rs485, sizeof(rs485)))
return -EFAULT;
return 0;
default:
break;
}
#endif
return -ENOIOCTLCMD;
}
static int max310x_startup(struct uart_port *port)
{
unsigned int val, line = port->line;
struct max310x_port *s = dev_get_drvdata(port->dev);
unsigned int val;
s->devtype->power(port, 1);
/* Configure baud rate, 9600 as default */
max310x_set_baud(port, 9600);
/* Configure LCR register, 8N1 mode by default */
max310x_port_write(port, MAX310X_LCR_REG, MAX310X_LCR_WORD_LEN_8);
/* Configure MODE1 register */
max310x_port_update(port, MAX310X_MODE1_REG,
MAX310X_MODE1_TRNSCVCTRL_BIT,
(s->pdata->uart_flags[line] & MAX310X_AUTO_DIR_CTRL)
? MAX310X_MODE1_TRNSCVCTRL_BIT : 0);
MAX310X_MODE1_TRNSCVCTRL_BIT, 0);
/* Configure MODE2 register */
val = MAX310X_MODE2_RXEMPTINV_BIT;
if (s->pdata->uart_flags[line] & MAX310X_LOOPBACK)
val |= MAX310X_MODE2_LOOPBACK_BIT;
if (s->pdata->uart_flags[line] & MAX310X_ECHO_SUPRESS)
val |= MAX310X_MODE2_ECHOSUPR_BIT;
/* Reset FIFOs */
val |= MAX310X_MODE2_FIFORST_BIT;
/* Configure MODE2 register & Reset FIFOs*/
val = MAX310X_MODE2_RXEMPTINV_BIT | MAX310X_MODE2_FIFORST_BIT;
max310x_port_write(port, MAX310X_MODE2_REG, val);
max310x_port_update(port, MAX310X_MODE2_REG,
MAX310X_MODE2_FIFORST_BIT, 0);
@ -989,6 +1018,7 @@ static const struct uart_ops max310x_ops = {
.release_port = max310x_null_void,
.config_port = max310x_config_port,
.verify_port = max310x_verify_port,
.ioctl = max310x_ioctl,
};
static int __maybe_unused max310x_suspend(struct device *dev)
@ -1017,6 +1047,8 @@ static int __maybe_unused max310x_resume(struct device *dev)
return 0;
}
static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
#ifdef CONFIG_GPIOLIB
static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset)
{
@ -1063,23 +1095,16 @@ static int max310x_gpio_direction_output(struct gpio_chip *chip,
}
#endif
static int max310x_probe(struct device *dev, int is_spi,
struct max310x_devtype *devtype, int irq)
static int max310x_probe(struct device *dev, struct max310x_devtype *devtype,
struct regmap *regmap, int irq, unsigned long flags)
{
int i, ret, fmin, fmax, freq, uartclk;
struct clk *clk_osc, *clk_xtal;
struct max310x_port *s;
struct max310x_pdata *pdata = dev_get_platdata(dev);
int i, ret, uartclk;
bool xtal = false;
/* Check for IRQ */
if (irq <= 0) {
dev_err(dev, "No IRQ specified\n");
return -ENOTSUPP;
}
if (!pdata) {
dev_err(dev, "No platform data supplied\n");
return -EINVAL;
}
if (IS_ERR(regmap))
return PTR_ERR(regmap);
/* Alloc port structure */
s = devm_kzalloc(dev, sizeof(*s) +
@ -1089,52 +1114,44 @@ static int max310x_probe(struct device *dev, int is_spi,
return -ENOMEM;
}
/* Check input frequency */
if ((pdata->driver_flags & MAX310X_EXT_CLK) &&
((pdata->frequency < 500000) || (pdata->frequency > 35000000)))
goto err_freq;
/* Check frequency for quartz */
if (!(pdata->driver_flags & MAX310X_EXT_CLK) &&
((pdata->frequency < 1000000) || (pdata->frequency > 4000000)))
goto err_freq;
s->pdata = pdata;
s->devtype = devtype;
dev_set_drvdata(dev, s);
mutex_init(&s->mutex);
/* Setup regmap */
s->regcfg.reg_bits = 8;
s->regcfg.val_bits = 8;
s->regcfg.read_flag_mask = 0x00;
s->regcfg.write_flag_mask = 0x80;
s->regcfg.cache_type = REGCACHE_RBTREE;
s->regcfg.writeable_reg = max310x_reg_writeable;
s->regcfg.volatile_reg = max310x_reg_volatile;
s->regcfg.precious_reg = max310x_reg_precious;
s->regcfg.max_register = devtype->nr * 0x20 - 1;
if (IS_ENABLED(CONFIG_SPI_MASTER) && is_spi) {
struct spi_device *spi = to_spi_device(dev);
s->regmap = devm_regmap_init_spi(spi, &s->regcfg);
} else
return -ENOTSUPP;
if (IS_ERR(s->regmap)) {
dev_err(dev, "Failed to initialize register map\n");
return PTR_ERR(s->regmap);
clk_osc = devm_clk_get(dev, "osc");
clk_xtal = devm_clk_get(dev, "xtal");
if (!IS_ERR(clk_osc)) {
s->clk = clk_osc;
fmin = 500000;
fmax = 35000000;
} else if (!IS_ERR(clk_xtal)) {
s->clk = clk_xtal;
fmin = 1000000;
fmax = 4000000;
xtal = true;
} else if (PTR_ERR(clk_osc) == -EPROBE_DEFER ||
PTR_ERR(clk_xtal) == -EPROBE_DEFER) {
return -EPROBE_DEFER;
} else {
dev_err(dev, "Cannot get clock\n");
return -EINVAL;
}
/* Board specific configure */
if (s->pdata->init)
s->pdata->init();
ret = clk_prepare_enable(s->clk);
if (ret)
return ret;
freq = clk_get_rate(s->clk);
/* Check frequency limits */
if (freq < fmin || freq > fmax) {
ret = -ERANGE;
goto out_clk;
}
s->regmap = regmap;
s->devtype = devtype;
dev_set_drvdata(dev, s);
/* Check device to ensure we are talking to what we expect */
ret = devtype->detect(dev);
if (ret)
return ret;
goto out_clk;
for (i = 0; i < devtype->nr; i++) {
unsigned int offs = i << 5;
@ -1156,7 +1173,7 @@ static int max310x_probe(struct device *dev, int is_spi,
MAX310X_MODE1_AUTOSLEEP_BIT);
}
uartclk = max310x_set_ref_clk(s);
uartclk = max310x_set_ref_clk(s, freq, xtal);
dev_dbg(dev, "Reference clock set to %i Hz\n", uartclk);
/* Register UART driver */
@ -1168,9 +1185,28 @@ static int max310x_probe(struct device *dev, int is_spi,
ret = uart_register_driver(&s->uart);
if (ret) {
dev_err(dev, "Registering UART driver failed\n");
return ret;
goto out_clk;
}
#ifdef CONFIG_GPIOLIB
/* Setup GPIO cotroller */
s->gpio.owner = THIS_MODULE;
s->gpio.dev = dev;
s->gpio.label = dev_name(dev);
s->gpio.direction_input = max310x_gpio_direction_input;
s->gpio.get = max310x_gpio_get;
s->gpio.direction_output= max310x_gpio_direction_output;
s->gpio.set = max310x_gpio_set;
s->gpio.base = -1;
s->gpio.ngpio = devtype->nr * 4;
s->gpio.can_sleep = 1;
ret = gpiochip_add(&s->gpio);
if (ret)
goto out_uart;
#endif
mutex_init(&s->mutex);
for (i = 0; i < devtype->nr; i++) {
/* Initialize port data */
s->p[i].port.line = i;
@ -1178,8 +1214,7 @@ static int max310x_probe(struct device *dev, int is_spi,
s->p[i].port.irq = irq;
s->p[i].port.type = PORT_MAX310X;
s->p[i].port.fifosize = MAX310X_FIFO_SIZE;
s->p[i].port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE |
UPF_LOW_LATENCY;
s->p[i].port.flags = UPF_FIXED_TYPE | UPF_LOW_LATENCY;
s->p[i].port.iotype = UPIO_PORT;
s->p[i].port.iobase = i * 0x20;
s->p[i].port.membase = (void __iomem *)~0;
@ -1195,48 +1230,35 @@ static int max310x_probe(struct device *dev, int is_spi,
MAX310X_MODE1_IRQSEL_BIT);
/* Initialize queue for start TX */
INIT_WORK(&s->p[i].tx_work, max310x_wq_proc);
/* Initialize queue for changing mode */
INIT_WORK(&s->p[i].md_work, max310x_md_proc);
/* Register port */
uart_add_one_port(&s->uart, &s->p[i].port);
/* Go to suspend mode */
devtype->power(&s->p[i].port, 0);
}
#ifdef CONFIG_GPIOLIB
/* Setup GPIO cotroller */
if (s->pdata->gpio_base) {
s->gpio.owner = THIS_MODULE;
s->gpio.dev = dev;
s->gpio.label = dev_name(dev);
s->gpio.direction_input = max310x_gpio_direction_input;
s->gpio.get = max310x_gpio_get;
s->gpio.direction_output= max310x_gpio_direction_output;
s->gpio.set = max310x_gpio_set;
s->gpio.base = s->pdata->gpio_base;
s->gpio.ngpio = devtype->nr * 4;
s->gpio.can_sleep = 1;
if (!gpiochip_add(&s->gpio))
s->gpio_used = 1;
} else
dev_info(dev, "GPIO support not enabled\n");
#endif
/* Setup interrupt */
ret = devm_request_threaded_irq(dev, irq, NULL, max310x_ist,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(dev), s);
if (ret) {
IRQF_ONESHOT | flags, dev_name(dev), s);
if (!ret)
return 0;
dev_err(dev, "Unable to reguest IRQ %i\n", irq);
mutex_destroy(&s->mutex);
#ifdef CONFIG_GPIOLIB
if (s->gpio_used)
WARN_ON(gpiochip_remove(&s->gpio));
out_uart:
#endif
}
uart_unregister_driver(&s->uart);
out_clk:
clk_disable_unprepare(s->clk);
return ret;
err_freq:
dev_err(dev, "Frequency parameter incorrect\n");
return -EINVAL;
}
static int max310x_remove(struct device *dev)
@ -1244,30 +1266,51 @@ static int max310x_remove(struct device *dev)
struct max310x_port *s = dev_get_drvdata(dev);
int i, ret = 0;
#ifdef CONFIG_GPIOLIB
ret = gpiochip_remove(&s->gpio);
if (ret)
return ret;
#endif
for (i = 0; i < s->uart.nr; i++) {
cancel_work_sync(&s->p[i].tx_work);
cancel_work_sync(&s->p[i].md_work);
uart_remove_one_port(&s->uart, &s->p[i].port);
s->devtype->power(&s->p[i].port, 0);
}
mutex_destroy(&s->mutex);
uart_unregister_driver(&s->uart);
#ifdef CONFIG_GPIOLIB
if (s->gpio_used)
ret = gpiochip_remove(&s->gpio);
#endif
if (s->pdata->exit)
s->pdata->exit();
clk_disable_unprepare(s->clk);
return ret;
}
static const struct of_device_id __maybe_unused max310x_dt_ids[] = {
{ .compatible = "maxim,max3107", .data = &max3107_devtype, },
{ .compatible = "maxim,max3108", .data = &max3108_devtype, },
{ .compatible = "maxim,max3109", .data = &max3109_devtype, },
{ .compatible = "maxim,max14830", .data = &max14830_devtype },
{ }
};
MODULE_DEVICE_TABLE(of, max310x_dt_ids);
static struct regmap_config regcfg = {
.reg_bits = 8,
.val_bits = 8,
.write_flag_mask = 0x80,
.cache_type = REGCACHE_RBTREE,
.writeable_reg = max310x_reg_writeable,
.volatile_reg = max310x_reg_volatile,
.precious_reg = max310x_reg_precious,
};
#ifdef CONFIG_SPI_MASTER
static int max310x_spi_probe(struct spi_device *spi)
{
struct max310x_devtype *devtype =
(struct max310x_devtype *)spi_get_device_id(spi)->driver_data;
struct max310x_devtype *devtype;
unsigned long flags = 0;
struct regmap *regmap;
int ret;
/* Setup SPI bus */
@ -1275,12 +1318,25 @@ static int max310x_spi_probe(struct spi_device *spi)
spi->mode = spi->mode ? : SPI_MODE_0;
spi->max_speed_hz = spi->max_speed_hz ? : 26000000;
ret = spi_setup(spi);
if (ret) {
dev_err(&spi->dev, "SPI setup failed\n");
if (ret)
return ret;
if (spi->dev.of_node) {
const struct of_device_id *of_id =
of_match_device(max310x_dt_ids, &spi->dev);
devtype = (struct max310x_devtype *)of_id->data;
} else {
const struct spi_device_id *id_entry = spi_get_device_id(spi);
devtype = (struct max310x_devtype *)id_entry->driver_data;
flags = IRQF_TRIGGER_FALLING;
}
return max310x_probe(&spi->dev, 1, devtype, spi->irq);
regcfg.max_register = devtype->nr * 0x20 - 1;
regmap = devm_regmap_init_spi(spi, &regcfg);
return max310x_probe(&spi->dev, devtype, regmap, spi->irq, flags);
}
static int max310x_spi_remove(struct spi_device *spi)
@ -1288,8 +1344,6 @@ static int max310x_spi_remove(struct spi_device *spi)
return max310x_remove(&spi->dev);
}
static SIMPLE_DEV_PM_OPS(max310x_pm_ops, max310x_suspend, max310x_resume);
static const struct spi_device_id max310x_id_table[] = {
{ "max3107", (kernel_ulong_t)&max3107_devtype, },
{ "max3108", (kernel_ulong_t)&max3108_devtype, },
@ -1303,6 +1357,7 @@ static struct spi_driver max310x_uart_driver = {
.driver = {
.name = MAX310X_NAME,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(max310x_dt_ids),
.pm = &max310x_pm_ops,
},
.probe = max310x_spi_probe,

140
drivers/tty/serial/msm_serial.c
View File

@ -39,6 +39,13 @@
#include "msm_serial.h"
enum {
UARTDM_1P1 = 1,
UARTDM_1P2,
UARTDM_1P3,
UARTDM_1P4,
};
struct msm_port {
struct uart_port uart;
char name[16];
@ -309,6 +316,8 @@ static unsigned int msm_get_mctrl(struct uart_port *port)
static void msm_reset(struct uart_port *port)
{
struct msm_port *msm_port = UART_TO_MSM(port);
/* reset everything */
msm_write(port, UART_CR_CMD_RESET_RX, UART_CR);
msm_write(port, UART_CR_CMD_RESET_TX, UART_CR);
@ -316,6 +325,10 @@ static void msm_reset(struct uart_port *port)
msm_write(port, UART_CR_CMD_RESET_BREAK_INT, UART_CR);
msm_write(port, UART_CR_CMD_RESET_CTS, UART_CR);
msm_write(port, UART_CR_CMD_SET_RFR, UART_CR);
/* Disable DM modes */
if (msm_port->is_uartdm)
msm_write(port, 0, UARTDM_DMEN);
}
static void msm_set_mctrl(struct uart_port *port, unsigned int mctrl)
@ -711,6 +724,117 @@ static void msm_power(struct uart_port *port, unsigned int state,
}
}
#ifdef CONFIG_CONSOLE_POLL
static int msm_poll_init(struct uart_port *port)
{
struct msm_port *msm_port = UART_TO_MSM(port);
/* Enable single character mode on RX FIFO */
if (msm_port->is_uartdm >= UARTDM_1P4)
msm_write(port, UARTDM_DMEN_RX_SC_ENABLE, UARTDM_DMEN);
return 0;
}
static int msm_poll_get_char_single(struct uart_port *port)
{
struct msm_port *msm_port = UART_TO_MSM(port);
unsigned int rf_reg = msm_port->is_uartdm ? UARTDM_RF : UART_RF;
if (!(msm_read(port, UART_SR) & UART_SR_RX_READY))
return NO_POLL_CHAR;
else
return msm_read(port, rf_reg) & 0xff;
}
static int msm_poll_get_char_dm_1p3(struct uart_port *port)
{
int c;
static u32 slop;
static int count;
unsigned char *sp = (unsigned char *)&slop;
/* Check if a previous read had more than one char */
if (count) {
c = sp[sizeof(slop) - count];
count--;
/* Or if FIFO is empty */
} else if (!(msm_read(port, UART_SR) & UART_SR_RX_READY)) {
/*
* If RX packing buffer has less than a word, force stale to
* push contents into RX FIFO
*/
count = msm_read(port, UARTDM_RXFS);
count = (count >> UARTDM_RXFS_BUF_SHIFT) & UARTDM_RXFS_BUF_MASK;
if (count) {
msm_write(port, UART_CR_CMD_FORCE_STALE, UART_CR);
slop = msm_read(port, UARTDM_RF);
c = sp[0];
count--;
} else {
c = NO_POLL_CHAR;
}
/* FIFO has a word */
} else {
slop = msm_read(port, UARTDM_RF);
c = sp[0];
count = sizeof(slop) - 1;
}
return c;
}
static int msm_poll_get_char(struct uart_port *port)
{
u32 imr;
int c;
struct msm_port *msm_port = UART_TO_MSM(port);
/* Disable all interrupts */
imr = msm_read(port, UART_IMR);
msm_write(port, 0, UART_IMR);
if (msm_port->is_uartdm == UARTDM_1P3)
c = msm_poll_get_char_dm_1p3(port);
else
c = msm_poll_get_char_single(port);
/* Enable interrupts */
msm_write(port, imr, UART_IMR);
return c;
}
static void msm_poll_put_char(struct uart_port *port, unsigned char c)
{
u32 imr;
struct msm_port *msm_port = UART_TO_MSM(port);
/* Disable all interrupts */
imr = msm_read(port, UART_IMR);
msm_write(port, 0, UART_IMR);
if (msm_port->is_uartdm)
reset_dm_count(port, 1);
/* Wait until FIFO is empty */
while (!(msm_read(port, UART_SR) & UART_SR_TX_READY))
cpu_relax();
/* Write a character */
msm_write(port, c, msm_port->is_uartdm ? UARTDM_TF : UART_TF);
/* Wait until FIFO is empty */
while (!(msm_read(port, UART_SR) & UART_SR_TX_READY))
cpu_relax();
/* Enable interrupts */
msm_write(port, imr, UART_IMR);
return;
}
#endif
static struct uart_ops msm_uart_pops = {
.tx_empty = msm_tx_empty,
.set_mctrl = msm_set_mctrl,
@ -729,6 +853,11 @@ static struct uart_ops msm_uart_pops = {
.config_port = msm_config_port,
.verify_port = msm_verify_port,
.pm = msm_power,
#ifdef CONFIG_CONSOLE_POLL
.poll_init = msm_poll_init,
.poll_get_char = msm_poll_get_char,
.poll_put_char = msm_poll_put_char,
#endif
};
static struct msm_port msm_uart_ports[] = {
@ -900,7 +1029,10 @@ static struct uart_driver msm_uart_driver = {
static atomic_t msm_uart_next_id = ATOMIC_INIT(0);
static const struct of_device_id msm_uartdm_table[] = {
{ .compatible = "qcom,msm-uartdm" },
{ .compatible = "qcom,msm-uartdm-v1.1", .data = (void *)UARTDM_1P1 },
{ .compatible = "qcom,msm-uartdm-v1.2", .data = (void *)UARTDM_1P2 },
{ .compatible = "qcom,msm-uartdm-v1.3", .data = (void *)UARTDM_1P3 },
{ .compatible = "qcom,msm-uartdm-v1.4", .data = (void *)UARTDM_1P4 },
{ }
};
@ -909,6 +1041,7 @@ static int __init msm_serial_probe(struct platform_device *pdev)
struct msm_port *msm_port;
struct resource *resource;
struct uart_port *port;
const struct of_device_id *id;
int irq;
if (pdev->id == -1)
@ -923,8 +1056,9 @@ static int __init msm_serial_probe(struct platform_device *pdev)
port->dev = &pdev->dev;
msm_port = UART_TO_MSM(port);
if (of_match_device(msm_uartdm_table, &pdev->dev))
msm_port->is_uartdm = 1;
id = of_match_device(msm_uartdm_table, &pdev->dev);
if (id)
msm_port->is_uartdm = (unsigned long)id->data;
else
msm_port->is_uartdm = 0;

9
drivers/tty/serial/msm_serial.h
View File

@ -59,6 +59,7 @@
#define UART_CR_CMD_RESET_RFR (14 << 4)
#define UART_CR_CMD_PROTECTION_EN (16 << 4)
#define UART_CR_CMD_STALE_EVENT_ENABLE (80 << 4)
#define UART_CR_CMD_FORCE_STALE (4 << 8)
#define UART_CR_CMD_RESET_TX_READY (3 << 8)
#define UART_CR_TX_DISABLE (1 << 3)
#define UART_CR_TX_ENABLE (1 << 2)
@ -113,6 +114,14 @@
#define GSBI_PROTOCOL_UART 0x40
#define GSBI_PROTOCOL_IDLE 0x0
#define UARTDM_RXFS 0x50
#define UARTDM_RXFS_BUF_SHIFT 0x7
#define UARTDM_RXFS_BUF_MASK 0x7
#define UARTDM_DMEN 0x3C
#define UARTDM_DMEN_RX_SC_ENABLE BIT(5)
#define UARTDM_DMEN_TX_SC_ENABLE BIT(4)
#define UARTDM_DMRX 0x34
#define UARTDM_NCF_TX 0x40
#define UARTDM_RX_TOTAL_SNAP 0x38

11
drivers/tty/serial/omap-serial.c
View File

@ -342,7 +342,14 @@ static void serial_omap_stop_tx(struct uart_port *port)
if ((up->rs485.flags & SER_RS485_ENABLED) &&
!(up->rs485.flags & SER_RS485_RX_DURING_TX)) {
up->ier = UART_IER_RLSI | UART_IER_RDI;
/*
* Empty the RX FIFO, we are not interested in anything
* received during the half-duplex transmission.
*/
serial_out(up, UART_FCR, up->fcr | UART_FCR_CLEAR_RCVR);
/* Re-enable RX interrupts */
up->ier |= UART_IER_RLSI | UART_IER_RDI;
up->port.read_status_mask |= UART_LSR_DR;
serial_out(up, UART_IER, up->ier);
}
@ -355,7 +362,7 @@ static void serial_omap_stop_rx(struct uart_port *port)
struct uart_omap_port *up = to_uart_omap_port(port);
pm_runtime_get_sync(up->dev);
up->ier &= ~UART_IER_RLSI;
up->ier &= ~(UART_IER_RLSI | UART_IER_RDI);
up->port.read_status_mask &= ~UART_LSR_DR;
serial_out(up, UART_IER, up->ier);
pm_runtime_mark_last_busy(up->dev);

2
drivers/tty/serial/pch_uart.c
View File

@ -1762,7 +1762,9 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
int fifosize;
int port_type;
struct pch_uart_driver_data *board;
#ifdef CONFIG_DEBUG_FS
char name[32]; /* for debugfs file name */
#endif
board = &drv_dat[id->driver_data];
port_type = board->port_type;

40
drivers/tty/serial/samsung.c
View File

@ -1282,6 +1282,14 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
if (ret < 0)
goto probe_err;
if (!s3c24xx_uart_drv.state) {
ret = uart_register_driver(&s3c24xx_uart_drv);
if (ret < 0) {
pr_err("Failed to register Samsung UART driver\n");
return ret;
}
}
dbg("%s: adding port\n", __func__);
uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
platform_set_drvdata(pdev, &ourport->port);
@ -1321,6 +1329,8 @@ static int s3c24xx_serial_remove(struct platform_device *dev)
uart_remove_one_port(&s3c24xx_uart_drv, port);
}
uart_unregister_driver(&s3c24xx_uart_drv);
return 0;
}
@ -1820,35 +1830,7 @@ static struct platform_driver samsung_serial_driver = {
},
};
/* module initialisation code */
static int __init s3c24xx_serial_modinit(void)
{
int ret;
ret = uart_register_driver(&s3c24xx_uart_drv);
if (ret < 0) {
pr_err("Failed to register Samsung UART driver\n");
return ret;
}
ret = platform_driver_register(&samsung_serial_driver);
if (ret < 0) {
pr_err("Failed to register platform driver\n");
uart_unregister_driver(&s3c24xx_uart_drv);
}
return ret;
}
static void __exit s3c24xx_serial_modexit(void)
{
platform_driver_unregister(&samsung_serial_driver);
uart_unregister_driver(&s3c24xx_uart_drv);
}
module_init(s3c24xx_serial_modinit);
module_exit(s3c24xx_serial_modexit);
module_platform_driver(samsung_serial_driver);
MODULE_ALIAS("platform:samsung-uart");
MODULE_DESCRIPTION("Samsung SoC Serial port driver");

20
drivers/tty/serial/serial_core.c
View File

@ -1319,9 +1319,9 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
uport = state->uart_port;
port = &state->port;
pr_debug("uart_close(%d) called\n", uport->line);
pr_debug("uart_close(%d) called\n", uport ? uport->line : -1);
if (tty_port_close_start(port, tty, filp) == 0)
if (!port->count || tty_port_close_start(port, tty, filp) == 0)
return;
/*
@ -1762,7 +1762,7 @@ uart_get_console(struct uart_port *ports, int nr, struct console *co)
}
/**
* uart_parse_options - Parse serial port baud/parity/bits/flow contro.
* uart_parse_options - Parse serial port baud/parity/bits/flow control.
* @options: pointer to option string
* @baud: pointer to an 'int' variable for the baud rate.
* @parity: pointer to an 'int' variable for the parity.
@ -2609,7 +2609,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
/*
* Register the port whether it's detected or not. This allows
* setserial to be used to alter this ports parameters.
* setserial to be used to alter this port's parameters.
*/
tty_dev = tty_port_register_device_attr(port, drv->tty_driver,
uport->line, uport->dev, port, tty_dev_attr_groups);
@ -2645,6 +2645,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
{
struct uart_state *state = drv->state + uport->line;
struct tty_port *port = &state->port;
struct tty_struct *tty;
int ret = 0;
BUG_ON(in_interrupt());
@ -2673,8 +2674,17 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
*/
tty_unregister_device(drv->tty_driver, uport->line);
if (port->tty)
tty = tty_port_tty_get(port);
if (tty) {
tty_vhangup(port->tty);
tty_kref_put(tty);
}
/*
* If the port is used as a console, unregister it
*/
if (uart_console(uport))
unregister_console(uport->cons);
/*
* Free the port IO and memory resources, if any.

86
drivers/tty/serial/sh-sci.c
View File

@ -428,7 +428,7 @@ static int sci_probe_regmap(struct plat_sci_port *cfg)
cfg->regtype = SCIx_HSCIF_REGTYPE;
break;
default:
printk(KERN_ERR "Can't probe register map for given port\n");
pr_err("Can't probe register map for given port\n");
return -EINVAL;
}
@ -788,7 +788,7 @@ static int sci_handle_errors(struct uart_port *port)
if (tty_insert_flip_char(tport, 0, TTY_OVERRUN))
copied++;
dev_notice(port->dev, "overrun error");
dev_notice(port->dev, "overrun error\n");
}
if (status & SCxSR_FER(port)) {
@ -830,7 +830,7 @@ static int sci_handle_errors(struct uart_port *port)
if (tty_insert_flip_char(tport, 0, TTY_PARITY))
copied++;
dev_notice(port->dev, "parity error");
dev_notice(port->dev, "parity error\n");
}
if (copied)
@ -911,7 +911,7 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
/* Disable future Rx interrupts */
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
disable_irq_nosync(irq);
scr |= 0x4000;
scr |= SCSCR_RDRQE;
} else {
scr &= ~SCSCR_RIE;
}
@ -1199,7 +1199,9 @@ static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
*/
reg = sci_getreg(port, SCFCR);
if (reg->size)
serial_port_out(port, SCFCR, serial_port_in(port, SCFCR) | 1);
serial_port_out(port, SCFCR,
serial_port_in(port, SCFCR) |
SCFCR_LOOP);
}
}
@ -1289,7 +1291,8 @@ static void sci_dma_rx_complete(void *arg)
unsigned long flags;
int count;
dev_dbg(port->dev, "%s(%d) active #%d\n", __func__, port->line, s->active_rx);
dev_dbg(port->dev, "%s(%d) active #%d\n",
__func__, port->line, s->active_rx);
spin_lock_irqsave(&port->lock, flags);
@ -1365,8 +1368,8 @@ static void sci_submit_rx(struct sci_port *s)
sci_rx_dma_release(s, true);
return;
}
dev_dbg(s->port.dev, "%s(): cookie %d to #%d\n", __func__,
s->cookie_rx[i], i);
dev_dbg(s->port.dev, "%s(): cookie %d to #%d\n",
__func__, s->cookie_rx[i], i);
}
s->active_rx = s->cookie_rx[0];
@ -1425,8 +1428,8 @@ static void work_fn_rx(struct work_struct *work)
s->active_rx = s->cookie_rx[!new];
dev_dbg(port->dev, "%s: cookie %d #%d, new active #%d\n", __func__,
s->cookie_rx[new], new, s->active_rx);
dev_dbg(port->dev, "%s: cookie %d #%d, new active #%d\n",
__func__, s->cookie_rx[new], new, s->active_rx);
}
static void work_fn_tx(struct work_struct *work)
@ -1479,8 +1482,8 @@ static void work_fn_tx(struct work_struct *work)
return;
}
dev_dbg(port->dev, "%s: %p: %d...%d, cookie %d\n", __func__,
xmit->buf, xmit->tail, xmit->head, s->cookie_tx);
dev_dbg(port->dev, "%s: %p: %d...%d, cookie %d\n",
__func__, xmit->buf, xmit->tail, xmit->head, s->cookie_tx);
dma_async_issue_pending(chan);
}
@ -1495,9 +1498,9 @@ static void sci_start_tx(struct uart_port *port)
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
u16 new, scr = serial_port_in(port, SCSCR);
if (s->chan_tx)
new = scr | 0x8000;
new = scr | SCSCR_TDRQE;
else
new = scr & ~0x8000;
new = scr & ~SCSCR_TDRQE;
if (new != scr)
serial_port_out(port, SCSCR, new);
}
@ -1524,7 +1527,7 @@ static void sci_stop_tx(struct uart_port *port)
ctrl = serial_port_in(port, SCSCR);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
ctrl &= ~0x8000;
ctrl &= ~SCSCR_TDRQE;
ctrl &= ~SCSCR_TIE;
@ -1538,7 +1541,7 @@ static void sci_start_rx(struct uart_port *port)
ctrl = serial_port_in(port, SCSCR) | port_rx_irq_mask(port);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
ctrl &= ~0x4000;
ctrl &= ~SCSCR_RDRQE;
serial_port_out(port, SCSCR, ctrl);
}
@ -1550,7 +1553,7 @@ static void sci_stop_rx(struct uart_port *port)
ctrl = serial_port_in(port, SCSCR);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
ctrl &= ~0x4000;
ctrl &= ~SCSCR_RDRQE;
ctrl &= ~port_rx_irq_mask(port);
@ -1599,8 +1602,8 @@ static bool filter(struct dma_chan *chan, void *slave)
{
struct sh_dmae_slave *param = slave;
dev_dbg(chan->device->dev, "%s: slave ID %d\n", __func__,
param->shdma_slave.slave_id);
dev_dbg(chan->device->dev, "%s: slave ID %d\n",
__func__, param->shdma_slave.slave_id);
chan->private = &param->shdma_slave;
return true;
@ -1613,7 +1616,7 @@ static void rx_timer_fn(unsigned long arg)
u16 scr = serial_port_in(port, SCSCR);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
scr &= ~0x4000;
scr &= ~SCSCR_RDRQE;
enable_irq(s->irqs[SCIx_RXI_IRQ]);
}
serial_port_out(port, SCSCR, scr | SCSCR_RIE);
@ -1629,8 +1632,7 @@ static void sci_request_dma(struct uart_port *port)
dma_cap_mask_t mask;
int nent;
dev_dbg(port->dev, "%s: port %d\n", __func__,
port->line);
dev_dbg(port->dev, "%s: port %d\n", __func__, port->line);
if (s->cfg->dma_slave_tx <= 0 || s->cfg->dma_slave_rx <= 0)
return;
@ -1658,7 +1660,8 @@ static void sci_request_dma(struct uart_port *port)
if (!nent)
sci_tx_dma_release(s, false);
else
dev_dbg(port->dev, "%s: mapped %d@%p to %pad\n", __func__,
dev_dbg(port->dev, "%s: mapped %d@%p to %pad\n",
__func__,
sg_dma_len(&s->sg_tx), port->state->xmit.buf,
&sg_dma_address(&s->sg_tx));
@ -1870,13 +1873,13 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
smr_val = serial_port_in(port, SCSMR) & 3;
if ((termios->c_cflag & CSIZE) == CS7)
smr_val |= 0x40;
smr_val |= SCSMR_CHR;
if (termios->c_cflag & PARENB)
smr_val |= 0x20;
smr_val |= SCSMR_PE;
if (termios->c_cflag & PARODD)
smr_val |= 0x30;
smr_val |= SCSMR_PE | SCSMR_ODD;
if (termios->c_cflag & CSTOPB)
smr_val |= 0x08;
smr_val |= SCSMR_STOP;
uart_update_timeout(port, termios->c_cflag, baud);
@ -1884,7 +1887,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
__func__, smr_val, cks, t, s->cfg->scscr);
if (t >= 0) {
serial_port_out(port, SCSMR, (smr_val & ~3) | cks);
serial_port_out(port, SCSMR, (smr_val & ~SCSMR_CKS) | cks);
serial_port_out(port, SCBRR, t);
reg = sci_getreg(port, HSSRR);
if (reg->size)
@ -1932,8 +1935,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
if (s->chan_rx) {
s->rx_timeout = (port->timeout - HZ / 50) * s->buf_len_rx * 3 /
port->fifosize / 2;
dev_dbg(port->dev,
"DMA Rx t-out %ums, tty t-out %u jiffies\n",
dev_dbg(port->dev, "DMA Rx t-out %ums, tty t-out %u jiffies\n",
s->rx_timeout * 1000 / HZ, port->timeout);
if (s->rx_timeout < msecs_to_jiffies(20))
s->rx_timeout = msecs_to_jiffies(20);
@ -1952,7 +1954,7 @@ static void sci_pm(struct uart_port *port, unsigned int state,
struct sci_port *sci_port = to_sci_port(port);
switch (state) {
case 3:
case UART_PM_STATE_OFF:
sci_port_disable(sci_port);
break;
default:
@ -2017,7 +2019,7 @@ static int sci_remap_port(struct uart_port *port)
* need to do any remapping, just cast the cookie
* directly.
*/
port->membase = (void __iomem *)port->mapbase;
port->membase = (void __iomem *)(uintptr_t)port->mapbase;
}
return 0;
@ -2388,8 +2390,7 @@ static inline int sci_probe_earlyprintk(struct platform_device *pdev)
#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
static char banner[] __initdata =
KERN_INFO "SuperH (H)SCI(F) driver initialized\n";
static const char banner[] __initconst = "SuperH (H)SCI(F) driver initialized";
static struct uart_driver sci_uart_driver = {
.owner = THIS_MODULE,
@ -2423,25 +2424,25 @@ struct sci_port_info {
static const struct of_device_id of_sci_match[] = {
{
.compatible = "renesas,scif",
.data = (void *)&(const struct sci_port_info) {
.data = &(const struct sci_port_info) {
.type = PORT_SCIF,
.regtype = SCIx_SH4_SCIF_REGTYPE,
},
}, {
.compatible = "renesas,scifa",
.data = (void *)&(const struct sci_port_info) {
.data = &(const struct sci_port_info) {
.type = PORT_SCIFA,
.regtype = SCIx_SCIFA_REGTYPE,
},
}, {
.compatible = "renesas,scifb",
.data = (void *)&(const struct sci_port_info) {
.data = &(const struct sci_port_info) {
.type = PORT_SCIFB,
.regtype = SCIx_SCIFB_REGTYPE,
},
}, {
.compatible = "renesas,hscif",
.data = (void *)&(const struct sci_port_info) {
.data = &(const struct sci_port_info) {
.type = PORT_HSCIF,
.regtype = SCIx_HSCIF_REGTYPE,
},
@ -2501,11 +2502,9 @@ static int sci_probe_single(struct platform_device *dev,
/* Sanity check */
if (unlikely(index >= SCI_NPORTS)) {
dev_notice(&dev->dev, "Attempting to register port "
"%d when only %d are available.\n",
dev_notice(&dev->dev, "Attempting to register port %d when only %d are available\n",
index+1, SCI_NPORTS);
dev_notice(&dev->dev, "Consider bumping "
"CONFIG_SERIAL_SH_SCI_NR_UARTS!\n");
dev_notice(&dev->dev, "Consider bumping CONFIG_SERIAL_SH_SCI_NR_UARTS!\n");
return -EINVAL;
}
@ -2563,6 +2562,7 @@ static int sci_probe(struct platform_device *dev)
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;
}
@ -2614,7 +2614,7 @@ static int __init sci_init(void)
{
int ret;
printk(banner);
pr_info("%s\n", banner);
ret = uart_register_driver(&sci_uart_driver);
if (likely(ret == 0)) {

189
drivers/tty/serial/sirfsoc_uart.c
View File

@ -24,7 +24,6 @@
#include <linux/dmaengine.h>
#include <linux/dma-direction.h>
#include <linux/dma-mapping.h>
#include <linux/sirfsoc_dma.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
@ -173,7 +172,7 @@ static void sirfsoc_uart_stop_tx(struct uart_port *port)
struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no)) {
if (sirfport->tx_dma_chan) {
if (sirfport->tx_dma_state == TX_DMA_RUNNING) {
dmaengine_pause(sirfport->tx_dma_chan);
sirfport->tx_dma_state = TX_DMA_PAUSE;
@ -288,7 +287,7 @@ static void sirfsoc_uart_start_tx(struct uart_port *port)
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no))
if (sirfport->tx_dma_chan)
sirfsoc_uart_tx_with_dma(sirfport);
else {
sirfsoc_uart_pio_tx_chars(sirfport, 1);
@ -310,7 +309,7 @@ static void sirfsoc_uart_stop_rx(struct uart_port *port)
struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
if (IS_DMA_CHAN_VALID(sirfport->rx_dma_no)) {
if (sirfport->rx_dma_chan) {
if (!sirfport->is_marco)
wr_regl(port, ureg->sirfsoc_int_en_reg,
rd_regl(port, ureg->sirfsoc_int_en_reg) &
@ -675,7 +674,7 @@ static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id)
uart_handle_cts_change(port, cts_status);
wake_up_interruptible(&state->port.delta_msr_wait);
}
if (IS_DMA_CHAN_VALID(sirfport->rx_dma_no)) {
if (sirfport->rx_dma_chan) {
if (intr_status & uint_st->sirfsoc_rx_timeout)
sirfsoc_uart_handle_rx_tmo(sirfport);
if (intr_status & uint_st->sirfsoc_rx_done)
@ -686,7 +685,7 @@ static irqreturn_t sirfsoc_uart_isr(int irq, void *dev_id)
SIRFSOC_UART_IO_RX_MAX_CNT);
}
if (intr_status & uint_st->sirfsoc_txfifo_empty) {
if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no))
if (sirfport->tx_dma_chan)
sirfsoc_uart_tx_with_dma(sirfport);
else {
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
@ -778,7 +777,7 @@ static void sirfsoc_uart_start_rx(struct uart_port *port)
wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_RESET);
wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
wr_regl(port, ureg->sirfsoc_rx_fifo_op, SIRFUART_FIFO_START);
if (IS_DMA_CHAN_VALID(sirfport->rx_dma_no))
if (sirfport->rx_dma_chan)
sirfsoc_uart_start_next_rx_dma(port);
else {
if (!sirfport->is_marco)
@ -1014,11 +1013,11 @@ static void sirfsoc_uart_set_termios(struct uart_port *port,
(sample_div_reg & SIRFSOC_USP_ASYNC_DIV2_MASK) <<
SIRFSOC_USP_ASYNC_DIV2_OFFSET);
}
if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no))
if (sirfport->tx_dma_chan)
wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_DMA_MODE);
else
wr_regl(port, ureg->sirfsoc_tx_dma_io_ctrl, SIRFUART_IO_MODE);
if (IS_DMA_CHAN_VALID(sirfport->rx_dma_no))
if (sirfport->rx_dma_chan)
wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, SIRFUART_DMA_MODE);
else
wr_regl(port, ureg->sirfsoc_rx_dma_io_ctrl, SIRFUART_IO_MODE);
@ -1049,93 +1048,6 @@ static void sirfsoc_uart_pm(struct uart_port *port, unsigned int state,
clk_disable_unprepare(sirfport->clk);
}
static unsigned int sirfsoc_uart_init_tx_dma(struct uart_port *port)
{
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
dma_cap_mask_t dma_mask;
struct dma_slave_config tx_slv_cfg = {
.dst_maxburst = 2,
};
dma_cap_zero(dma_mask);
dma_cap_set(DMA_SLAVE, dma_mask);
sirfport->tx_dma_chan = dma_request_channel(dma_mask,
(dma_filter_fn)sirfsoc_dma_filter_id,
(void *)sirfport->tx_dma_no);
if (!sirfport->tx_dma_chan) {
dev_err(port->dev, "Uart Request Dma Channel Fail %d\n",
sirfport->tx_dma_no);
return -EPROBE_DEFER;
}
dmaengine_slave_config(sirfport->tx_dma_chan, &tx_slv_cfg);
return 0;
}
static unsigned int sirfsoc_uart_init_rx_dma(struct uart_port *port)
{
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
dma_cap_mask_t dma_mask;
int ret;
int i, j;
struct dma_slave_config slv_cfg = {
.src_maxburst = 2,
};
dma_cap_zero(dma_mask);
dma_cap_set(DMA_SLAVE, dma_mask);
sirfport->rx_dma_chan = dma_request_channel(dma_mask,
(dma_filter_fn)sirfsoc_dma_filter_id,
(void *)sirfport->rx_dma_no);
if (!sirfport->rx_dma_chan) {
dev_err(port->dev, "Uart Request Dma Channel Fail %d\n",
sirfport->rx_dma_no);
ret = -EPROBE_DEFER;
goto request_err;
}
for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++) {
sirfport->rx_dma_items[i].xmit.buf =
dma_alloc_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
&sirfport->rx_dma_items[i].dma_addr, GFP_KERNEL);
if (!sirfport->rx_dma_items[i].xmit.buf) {
dev_err(port->dev, "Uart alloc bufa failed\n");
ret = -ENOMEM;
goto alloc_coherent_err;
}
sirfport->rx_dma_items[i].xmit.head =
sirfport->rx_dma_items[i].xmit.tail = 0;
}
dmaengine_slave_config(sirfport->rx_dma_chan, &slv_cfg);
return 0;
alloc_coherent_err:
for (j = 0; j < i; j++)
dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
sirfport->rx_dma_items[j].xmit.buf,
sirfport->rx_dma_items[j].dma_addr);
dma_release_channel(sirfport->rx_dma_chan);
request_err:
return ret;
}
static void sirfsoc_uart_uninit_tx_dma(struct sirfsoc_uart_port *sirfport)
{
dmaengine_terminate_all(sirfport->tx_dma_chan);
dma_release_channel(sirfport->tx_dma_chan);
}
static void sirfsoc_uart_uninit_rx_dma(struct sirfsoc_uart_port *sirfport)
{
int i;
struct uart_port *port = &sirfport->port;
dmaengine_terminate_all(sirfport->rx_dma_chan);
dma_release_channel(sirfport->rx_dma_chan);
for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++)
dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
sirfport->rx_dma_items[i].xmit.buf,
sirfport->rx_dma_items[i].dma_addr);
}
static int sirfsoc_uart_startup(struct uart_port *port)
{
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
@ -1174,18 +1086,12 @@ static int sirfsoc_uart_startup(struct uart_port *port)
wr_regl(port, ureg->sirfsoc_rx_fifo_op, 0);
wr_regl(port, ureg->sirfsoc_tx_fifo_ctrl, SIRFUART_FIFO_THD(port));
wr_regl(port, ureg->sirfsoc_rx_fifo_ctrl, SIRFUART_FIFO_THD(port));
if (IS_DMA_CHAN_VALID(sirfport->rx_dma_no)) {
ret = sirfsoc_uart_init_rx_dma(port);
if (ret)
goto init_rx_err;
if (sirfport->rx_dma_chan)
wr_regl(port, ureg->sirfsoc_rx_fifo_level_chk,
SIRFUART_RX_FIFO_CHK_SC(port->line, 0x4) |
SIRFUART_RX_FIFO_CHK_LC(port->line, 0xe) |
SIRFUART_RX_FIFO_CHK_HC(port->line, 0x1b));
}
if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no)) {
sirfsoc_uart_init_tx_dma(port);
if (sirfport->tx_dma_chan) {
sirfport->tx_dma_state = TX_DMA_IDLE;
wr_regl(port, ureg->sirfsoc_tx_fifo_level_chk,
SIRFUART_TX_FIFO_CHK_SC(port->line, 0x1b) |
@ -1232,12 +1138,8 @@ static void sirfsoc_uart_shutdown(struct uart_port *port)
gpio_set_value(sirfport->rts_gpio, 1);
free_irq(gpio_to_irq(sirfport->cts_gpio), sirfport);
}
if (IS_DMA_CHAN_VALID(sirfport->rx_dma_no))
sirfsoc_uart_uninit_rx_dma(sirfport);
if (IS_DMA_CHAN_VALID(sirfport->tx_dma_no)) {
sirfsoc_uart_uninit_tx_dma(sirfport);
if (sirfport->tx_dma_chan)
sirfport->tx_dma_state = TX_DMA_IDLE;
}
}
static const char *sirfsoc_uart_type(struct uart_port *port)
@ -1313,8 +1215,8 @@ sirfsoc_uart_console_setup(struct console *co, char *options)
port->cons = co;
/* default console tx/rx transfer using io mode */
sirfport->rx_dma_no = UNVALID_DMA_CHAN;
sirfport->tx_dma_no = UNVALID_DMA_CHAN;
sirfport->rx_dma_chan = NULL;
sirfport->tx_dma_chan = NULL;
return uart_set_options(port, co, baud, parity, bits, flow);
}
@ -1382,6 +1284,13 @@ static int sirfsoc_uart_probe(struct platform_device *pdev)
struct uart_port *port;
struct resource *res;
int ret;
int i, j;
struct dma_slave_config slv_cfg = {
.src_maxburst = 2,
};
struct dma_slave_config tx_slv_cfg = {
.dst_maxburst = 2,
};
const struct of_device_id *match;
match = of_match_node(sirfsoc_uart_ids, pdev->dev.of_node);
@ -1402,27 +1311,10 @@ static int sirfsoc_uart_probe(struct platform_device *pdev)
sirfport->hw_flow_ctrl = of_property_read_bool(pdev->dev.of_node,
"sirf,uart-has-rtscts");
if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-uart")) {
if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-uart"))
sirfport->uart_reg->uart_type = SIRF_REAL_UART;
if (of_property_read_u32(pdev->dev.of_node,
"sirf,uart-dma-rx-channel",
&sirfport->rx_dma_no))
sirfport->rx_dma_no = UNVALID_DMA_CHAN;
if (of_property_read_u32(pdev->dev.of_node,
"sirf,uart-dma-tx-channel",
&sirfport->tx_dma_no))
sirfport->tx_dma_no = UNVALID_DMA_CHAN;
}
if (of_device_is_compatible(pdev->dev.of_node, "sirf,prima2-usp-uart")) {
sirfport->uart_reg->uart_type = SIRF_USP_UART;
if (of_property_read_u32(pdev->dev.of_node,
"sirf,usp-dma-rx-channel",
&sirfport->rx_dma_no))
sirfport->rx_dma_no = UNVALID_DMA_CHAN;
if (of_property_read_u32(pdev->dev.of_node,
"sirf,usp-dma-tx-channel",
&sirfport->tx_dma_no))
sirfport->tx_dma_no = UNVALID_DMA_CHAN;
if (!sirfport->hw_flow_ctrl)
goto usp_no_flow_control;
if (of_find_property(pdev->dev.of_node, "cts-gpios", NULL))
@ -1515,8 +1407,32 @@ static int sirfsoc_uart_probe(struct platform_device *pdev)
goto port_err;
}
return 0;
sirfport->rx_dma_chan = dma_request_slave_channel(port->dev, "rx");
for (i = 0; sirfport->rx_dma_chan && i < SIRFSOC_RX_LOOP_BUF_CNT; i++) {
sirfport->rx_dma_items[i].xmit.buf =
dma_alloc_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
&sirfport->rx_dma_items[i].dma_addr, GFP_KERNEL);
if (!sirfport->rx_dma_items[i].xmit.buf) {
dev_err(port->dev, "Uart alloc bufa failed\n");
ret = -ENOMEM;
goto alloc_coherent_err;
}
sirfport->rx_dma_items[i].xmit.head =
sirfport->rx_dma_items[i].xmit.tail = 0;
}
if (sirfport->rx_dma_chan)
dmaengine_slave_config(sirfport->rx_dma_chan, &slv_cfg);
sirfport->tx_dma_chan = dma_request_slave_channel(port->dev, "tx");
if (sirfport->tx_dma_chan)
dmaengine_slave_config(sirfport->tx_dma_chan, &tx_slv_cfg);
return 0;
alloc_coherent_err:
for (j = 0; j < i; j++)
dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
sirfport->rx_dma_items[j].xmit.buf,
sirfport->rx_dma_items[j].dma_addr);
dma_release_channel(sirfport->rx_dma_chan);
port_err:
clk_put(sirfport->clk);
err:
@ -1529,6 +1445,19 @@ static int sirfsoc_uart_remove(struct platform_device *pdev)
struct uart_port *port = &sirfport->port;
clk_put(sirfport->clk);
uart_remove_one_port(&sirfsoc_uart_drv, port);
if (sirfport->rx_dma_chan) {
int i;
dmaengine_terminate_all(sirfport->rx_dma_chan);
dma_release_channel(sirfport->rx_dma_chan);
for (i = 0; i < SIRFSOC_RX_LOOP_BUF_CNT; i++)
dma_free_coherent(port->dev, SIRFSOC_RX_DMA_BUF_SIZE,
sirfport->rx_dma_items[i].xmit.buf,
sirfport->rx_dma_items[i].dma_addr);
}
if (sirfport->tx_dma_chan) {
dmaengine_terminate_all(sirfport->tx_dma_chan);
dma_release_channel(sirfport->tx_dma_chan);
}
return 0;
}

5
drivers/tty/serial/sirfsoc_uart.h
View File

@ -392,9 +392,6 @@ struct sirfsoc_uart_register sirfsoc_uart = {
/* Indicate how many buffers used */
#define SIRFSOC_RX_LOOP_BUF_CNT 2
/* Indicate if DMA channel valid */
#define IS_DMA_CHAN_VALID(x) ((x) != -1)
#define UNVALID_DMA_CHAN -1
/* For Fast Baud Rate Calculation */
struct sirfsoc_baudrate_to_regv {
unsigned int baud_rate;
@ -423,8 +420,6 @@ struct sirfsoc_uart_port {
/* for SiRFmarco, there are SET/CLR for UART_INT_EN */
bool is_marco;
struct sirfsoc_uart_register *uart_reg;
int rx_dma_no;
int tx_dma_no;
struct dma_chan *rx_dma_chan;
struct dma_chan *tx_dma_chan;
dma_addr_t tx_dma_addr;

1
drivers/tty/synclink.c
View File

@ -7866,6 +7866,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
memset(&new_line, 0, sizeof(new_line));
switch (flags){
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;

1
drivers/tty/synclinkmp.c
View File

@ -1766,6 +1766,7 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
memset(&new_line, 0, sizeof(new_line));
switch (flags){
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;

18
drivers/tty/tty_buffer.c
View File

@ -351,14 +351,11 @@ EXPORT_SYMBOL(tty_insert_flip_string_flags);
* Takes any pending buffers and transfers their ownership to the
* ldisc side of the queue. It then schedules those characters for
* processing by the line discipline.
* Note that this function can only be used when the low_latency flag
* is unset. Otherwise the workqueue won't be flushed.
*/
void tty_schedule_flip(struct tty_port *port)
{
struct tty_bufhead *buf = &port->buf;
WARN_ON(port->low_latency);
buf->tail->commit = buf->tail->used;
schedule_work(&buf->work);
@ -482,7 +479,6 @@ static void flush_to_ldisc(struct work_struct *work)
*/
void tty_flush_to_ldisc(struct tty_struct *tty)
{
if (!tty->port->low_latency)
flush_work(&tty->port->buf.work);
}
@ -490,9 +486,8 @@ void tty_flush_to_ldisc(struct tty_struct *tty)
* tty_flip_buffer_push - terminal
* @port: tty port to push
*
* Queue a push of the terminal flip buffers to the line discipline. This
* function must not be called from IRQ context if port->low_latency is
* set.
* Queue a push of the terminal flip buffers to the line discipline.
* Can be called from IRQ/atomic context.
*
* In the event of the queue being busy for flipping the work will be
* held off and retried later.
@ -500,14 +495,7 @@ void tty_flush_to_ldisc(struct tty_struct *tty)
void tty_flip_buffer_push(struct tty_port *port)
{
struct tty_bufhead *buf = &port->buf;
buf->tail->commit = buf->tail->used;
if (port->low_latency)
flush_to_ldisc(&buf->work);
else
schedule_work(&buf->work);
tty_schedule_flip(port);
}
EXPORT_SYMBOL(tty_flip_buffer_push);

23
drivers/tty/tty_io.c
View File

@ -1271,12 +1271,13 @@ static void pty_line_name(struct tty_driver *driver, int index, char *p)
*
* Locking: None
*/
static void tty_line_name(struct tty_driver *driver, int index, char *p)
static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)
{
if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)
strcpy(p, driver->name);
return sprintf(p, "%s", driver->name);
else
sprintf(p, "%s%d", driver->name, index + driver->name_base);
return sprintf(p, "%s%d", driver->name,
index + driver->name_base);
}
/**
@ -3545,9 +3546,19 @@ static ssize_t show_cons_active(struct device *dev,
if (i >= ARRAY_SIZE(cs))
break;
}
while (i--)
count += sprintf(buf + count, "%s%d%c",
cs[i]->name, cs[i]->index, i ? ' ':'\n');
while (i--) {
int index = cs[i]->index;
struct tty_driver *drv = cs[i]->device(cs[i], &index);
/* don't resolve tty0 as some programs depend on it */
if (drv && (cs[i]->index > 0 || drv->major != TTY_MAJOR))
count += tty_line_name(drv, index, buf + count);
else
count += sprintf(buf + count, "%s%d",
cs[i]->name, cs[i]->index);
count += sprintf(buf + count, "%c", i ? ' ':'\n');
}
console_unlock();
return count;

20
drivers/tty/vt/vt.c
View File

@ -1590,9 +1590,9 @@ static void restore_cur(struct vc_data *vc)
vc->vc_need_wrap = 0;
}
enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey,
enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd,
ESpalette };
ESpalette, ESosc };
/* console_lock is held (except via vc_init()) */
static void reset_terminal(struct vc_data *vc, int do_clear)
@ -1652,11 +1652,15 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
* Control characters can be used in the _middle_
* of an escape sequence.
*/
if (vc->vc_state == ESosc && c>=8 && c<=13) /* ... except for OSC */
return;
switch (c) {
case 0:
return;
case 7:
if (vc->vc_bell_duration)
if (vc->vc_state == ESosc)
vc->vc_state = ESnormal;
else if (vc->vc_bell_duration)
kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
return;
case 8:
@ -1767,7 +1771,9 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
} else if (c=='R') { /* reset palette */
reset_palette(vc);
vc->vc_state = ESnormal;
} else
} else if (c>='0' && c<='9')
vc->vc_state = ESosc;
else
vc->vc_state = ESnormal;
return;
case ESpalette:
@ -1807,9 +1813,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_par[vc->vc_npar] *= 10;
vc->vc_par[vc->vc_npar] += c - '0';
return;
} else
vc->vc_state = ESgotpars;
case ESgotpars:
}
vc->vc_state = ESnormal;
switch(c) {
case 'h':
@ -2023,6 +2027,8 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_translate = set_translate(vc->vc_G1_charset, vc);
vc->vc_state = ESnormal;
return;
case ESosc:
return;
default:
vc->vc_state = ESnormal;
}

4
drivers/usb/gadget/u_serial.c
View File

@ -549,8 +549,8 @@ static void gs_rx_push(unsigned long _port)
port->read_started--;
}
/* Push from tty to ldisc; without low_latency set this is handled by
* a workqueue, so we won't get callbacks and can hold port_lock
/* Push from tty to ldisc; this is handled by a workqueue,
* so we won't get callbacks and can hold port_lock
*/
if (do_push)
tty_flip_buffer_push(&port->port);

64
include/linux/platform_data/max310x.h
View File

@ -1,64 +0,0 @@
/*
* Maxim (Dallas) MAX3107/8/9, MAX14830 serial driver
*
* Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru>
*
* Based on max3100.c, by Christian Pellegrin <chripell@evolware.org>
* Based on max3110.c, by Feng Tang <feng.tang@intel.com>
* Based on max3107.c, by Aavamobile
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef _MAX310X_H_
#define _MAX310X_H_
/*
* Example board initialization data:
*
* static struct max310x_pdata max3107_pdata = {
* .driver_flags = MAX310X_EXT_CLK,
* .uart_flags[0] = MAX310X_ECHO_SUPRESS | MAX310X_AUTO_DIR_CTRL,
* .frequency = 3686400,
* .gpio_base = -1,
* };
*
* static struct spi_board_info spi_device_max3107[] = {
* {
* .modalias = "max3107",
* .irq = IRQ_EINT3,
* .bus_num = 1,
* .chip_select = 1,
* .platform_data = &max3107_pdata,
* },
* };
*/
#define MAX310X_MAX_UARTS 4
/* MAX310X platform data structure */
struct max310x_pdata {
/* Flags global to driver */
const u8 driver_flags;
#define MAX310X_EXT_CLK (0x00000001) /* External clock enable */
/* Flags global to UART port */
const u8 uart_flags[MAX310X_MAX_UARTS];
#define MAX310X_LOOPBACK (0x00000001) /* Loopback mode enable */
#define MAX310X_ECHO_SUPRESS (0x00000002) /* Enable echo supress */
#define MAX310X_AUTO_DIR_CTRL (0x00000004) /* Enable Auto direction
* control (RS-485)
*/
/* Frequency (extrenal clock or crystal) */
const int frequency;
/* GPIO base number (can be negative) */
const int gpio_base;
/* Called during startup */
void (*init)(void);
/* Called before finish */
void (*exit)(void);
};
#endif

2
include/linux/platform_data/serial-imx.h
View File

@ -23,8 +23,6 @@
#define IMXUART_IRDA (1<<1)
struct imxuart_platform_data {
int (*init)(struct platform_device *pdev);
void (*exit)(struct platform_device *pdev);
unsigned int flags;
void (*irda_enable)(int enable);
unsigned int irda_inv_rx:1;

2
include/linux/serial_bcm63xx.h
View File

@ -116,4 +116,6 @@
UART_FIFO_PARERR_MASK | \
UART_FIFO_BRKDET_MASK)
#define UART_REG_SIZE 24
#endif /* _LINUX_SERIAL_BCM63XX_H */

91
include/linux/serial_sci.h
View File

@ -10,45 +10,59 @@
#define SCIx_NOT_SUPPORTED (-1)
#define SCSCR_TIE (1 << 7)
#define SCSCR_RIE (1 << 6)
#define SCSCR_TE (1 << 5)
#define SCSCR_RE (1 << 4)
#define SCSCR_REIE (1 << 3) /* not supported by all parts */
#define SCSCR_TOIE (1 << 2) /* not supported by all parts */
#define SCSCR_CKE1 (1 << 1)
#define SCSCR_CKE0 (1 << 0)
/* SCSMR (Serial Mode Register) */
#define SCSMR_CHR (1 << 6) /* 7-bit Character Length */
#define SCSMR_PE (1 << 5) /* Parity Enable */
#define SCSMR_ODD (1 << 4) /* Odd Parity */
#define SCSMR_STOP (1 << 3) /* Stop Bit Length */
#define SCSMR_CKS 0x0003 /* Clock Select */
/* SCxSR SCI */
#define SCI_TDRE 0x80
#define SCI_RDRF 0x40
#define SCI_ORER 0x20
#define SCI_FER 0x10
#define SCI_PER 0x08
#define SCI_TEND 0x04
/* Serial Control Register (@ = not supported by all parts) */
#define SCSCR_TIE (1 << 7) /* Transmit Interrupt Enable */
#define SCSCR_RIE (1 << 6) /* Receive Interrupt Enable */
#define SCSCR_TE (1 << 5) /* Transmit Enable */
#define SCSCR_RE (1 << 4) /* Receive Enable */
#define SCSCR_REIE (1 << 3) /* Receive Error Interrupt Enable @ */
#define SCSCR_TOIE (1 << 2) /* Timeout Interrupt Enable @ */
#define SCSCR_CKE1 (1 << 1) /* Clock Enable 1 */
#define SCSCR_CKE0 (1 << 0) /* Clock Enable 0 */
/* SCIFA/SCIFB only */
#define SCSCR_TDRQE (1 << 15) /* Tx Data Transfer Request Enable */
#define SCSCR_RDRQE (1 << 14) /* Rx Data Transfer Request Enable */
/* SCxSR (Serial Status Register) on SCI */
#define SCI_TDRE 0x80 /* Transmit Data Register Empty */
#define SCI_RDRF 0x40 /* Receive Data Register Full */
#define SCI_ORER 0x20 /* Overrun Error */
#define SCI_FER 0x10 /* Framing Error */
#define SCI_PER 0x08 /* Parity Error */
#define SCI_TEND 0x04 /* Transmit End */
#define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
/* SCxSR SCIF, HSCIF */
#define SCIF_ER 0x0080
#define SCIF_TEND 0x0040
#define SCIF_TDFE 0x0020
#define SCIF_BRK 0x0010
#define SCIF_FER 0x0008
#define SCIF_PER 0x0004
#define SCIF_RDF 0x0002
#define SCIF_DR 0x0001
/* SCxSR (Serial Status Register) on SCIF, HSCIF */
#define SCIF_ER 0x0080 /* Receive Error */
#define SCIF_TEND 0x0040 /* Transmission End */
#define SCIF_TDFE 0x0020 /* Transmit FIFO Data Empty */
#define SCIF_BRK 0x0010 /* Break Detect */
#define SCIF_FER 0x0008 /* Framing Error */
#define SCIF_PER 0x0004 /* Parity Error */
#define SCIF_RDF 0x0002 /* Receive FIFO Data Full */
#define SCIF_DR 0x0001 /* Receive Data Ready */
#define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
/* SCSPTR, optional */
#define SCSPTR_RTSIO (1 << 7)
#define SCSPTR_CTSIO (1 << 5)
#define SCSPTR_SPB2IO (1 << 1)
#define SCSPTR_SPB2DT (1 << 0)
/* SCFCR (FIFO Control Register) */
#define SCFCR_LOOP (1 << 0) /* Loopback Test */
/* SCSPTR (Serial Port Register), optional */
#define SCSPTR_RTSIO (1 << 7) /* Serial Port RTS Pin Input/Output */
#define SCSPTR_CTSIO (1 << 5) /* Serial Port CTS Pin Input/Output */
#define SCSPTR_SPB2IO (1 << 1) /* Serial Port Break Input/Output */
#define SCSPTR_SPB2DT (1 << 0) /* Serial Port Break Data */
/* HSSRR HSCIF */
#define HSCIF_SRE 0x8000
#define HSCIF_SRE 0x8000 /* Sampling Rate Register Enable */
enum {
SCIx_PROBE_REGTYPE,
@ -73,10 +87,19 @@ enum {
* Not all registers will exist on all parts.
*/
enum {
SCSMR, SCBRR, SCSCR, SCxSR,
SCFCR, SCFDR, SCxTDR, SCxRDR,
SCLSR, SCTFDR, SCRFDR, SCSPTR,
HSSRR,
SCSMR, /* Serial Mode Register */
SCBRR, /* Bit Rate Register */
SCSCR, /* Serial Control Register */
SCxSR, /* Serial Status Register */
SCFCR, /* FIFO Control Register */
SCFDR, /* FIFO Data Count Register */
SCxTDR, /* Transmit (FIFO) Data Register */
SCxRDR, /* Receive (FIFO) Data Register */
SCLSR, /* Line Status Register */
SCTFDR, /* Transmit FIFO Data Count Register */
SCRFDR, /* Receive FIFO Data Count Register */
SCSPTR, /* Serial Port Register */
HSSRR, /* Sampling Rate Register */
SCIx_NR_REGS,
};

2
include/linux/tty.h
View File

@ -208,7 +208,7 @@ struct tty_port {
wait_queue_head_t delta_msr_wait; /* Modem status change */
unsigned long flags; /* TTY flags ASY_*/
unsigned char console:1, /* port is a console */
low_latency:1; /* direct buffer flush */
low_latency:1; /* optional: tune for latency */
struct mutex mutex; /* Locking */
struct mutex buf_mutex; /* Buffer alloc lock */
unsigned char *xmit_buf; /* Optional buffer */

1
include/linux/tty_ldisc.h
View File

@ -126,7 +126,6 @@
#include <linux/fs.h>
#include <linux/wait.h>
#include <linux/wait.h>
/*