mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Now that the SPDX tag is in all tty files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Jiri Slaby <jslaby@suse.com> Cc: Eric Anholt <eric@anholt.net> Cc: Stefan Wahren <stefan.wahren@i2se.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ray Jui <rjui@broadcom.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Joachim Eastwood <manabian@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Tobias Klauser <tklauser@distanz.ch> Cc: Russell King <linux@armlinux.org.uk> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Richard Genoud <richard.genoud@gmail.com> Cc: Alexander Shiyan <shc_work@mail.ru> Cc: Baruch Siach <baruch@tkos.co.il> Cc: Pat Gefre <pfg@sgi.com> Cc: "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: Sylvain Lemieux <slemieux.tyco@gmail.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Andy Gross <andy.gross@linaro.org> Cc: David Brown <david.brown@linaro.org> Cc: "Andreas Färber" <afaerber@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Laxman Dewangan <ldewangan@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Cc: Barry Song <baohua@kernel.org> Cc: Patrice Chotard <patrice.chotard@st.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Peter Korsgaard <jacmet@sunsite.dk> Cc: Timur Tabi <timur@tabi.org> Cc: Tony Prisk <linux@prisktech.co.nz> Cc: Michal Simek <michal.simek@xilinx.com> Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
698 lines
15 KiB
C
698 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Driver for KS8695 serial ports
|
|
*
|
|
* Based on drivers/serial/serial_amba.c, by Kam Lee.
|
|
*
|
|
* Copyright 2002-2005 Micrel Inc.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/tty_flip.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/serial.h>
|
|
#include <linux/console.h>
|
|
#include <linux/sysrq.h>
|
|
#include <linux/device.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/irq.h>
|
|
|
|
#include <mach/regs-uart.h>
|
|
#include <mach/regs-irq.h>
|
|
|
|
#if defined(CONFIG_SERIAL_KS8695_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
|
|
#define SUPPORT_SYSRQ
|
|
#endif
|
|
|
|
#include <linux/serial_core.h>
|
|
|
|
|
|
#define SERIAL_KS8695_MAJOR 204
|
|
#define SERIAL_KS8695_MINOR 16
|
|
#define SERIAL_KS8695_DEVNAME "ttyAM"
|
|
|
|
#define SERIAL_KS8695_NR 1
|
|
|
|
/*
|
|
* Access macros for the KS8695 UART
|
|
*/
|
|
#define UART_GET_CHAR(p) (__raw_readl((p)->membase + KS8695_URRB) & 0xFF)
|
|
#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + KS8695_URTH)
|
|
#define UART_GET_FCR(p) __raw_readl((p)->membase + KS8695_URFC)
|
|
#define UART_PUT_FCR(p, c) __raw_writel((c), (p)->membase + KS8695_URFC)
|
|
#define UART_GET_MSR(p) __raw_readl((p)->membase + KS8695_URMS)
|
|
#define UART_GET_LSR(p) __raw_readl((p)->membase + KS8695_URLS)
|
|
#define UART_GET_LCR(p) __raw_readl((p)->membase + KS8695_URLC)
|
|
#define UART_PUT_LCR(p, c) __raw_writel((c), (p)->membase + KS8695_URLC)
|
|
#define UART_GET_MCR(p) __raw_readl((p)->membase + KS8695_URMC)
|
|
#define UART_PUT_MCR(p, c) __raw_writel((c), (p)->membase + KS8695_URMC)
|
|
#define UART_GET_BRDR(p) __raw_readl((p)->membase + KS8695_URBD)
|
|
#define UART_PUT_BRDR(p, c) __raw_writel((c), (p)->membase + KS8695_URBD)
|
|
|
|
#define KS8695_CLR_TX_INT() __raw_writel(1 << KS8695_IRQ_UART_TX, KS8695_IRQ_VA + KS8695_INTST)
|
|
|
|
#define UART_DUMMY_LSR_RX 0x100
|
|
#define UART_PORT_SIZE (KS8695_USR - KS8695_URRB + 4)
|
|
|
|
static inline int tx_enabled(struct uart_port *port)
|
|
{
|
|
return port->unused[0] & 1;
|
|
}
|
|
|
|
static inline int rx_enabled(struct uart_port *port)
|
|
{
|
|
return port->unused[0] & 2;
|
|
}
|
|
|
|
static inline int ms_enabled(struct uart_port *port)
|
|
{
|
|
return port->unused[0] & 4;
|
|
}
|
|
|
|
static inline void ms_enable(struct uart_port *port, int enabled)
|
|
{
|
|
if(enabled)
|
|
port->unused[0] |= 4;
|
|
else
|
|
port->unused[0] &= ~4;
|
|
}
|
|
|
|
static inline void rx_enable(struct uart_port *port, int enabled)
|
|
{
|
|
if(enabled)
|
|
port->unused[0] |= 2;
|
|
else
|
|
port->unused[0] &= ~2;
|
|
}
|
|
|
|
static inline void tx_enable(struct uart_port *port, int enabled)
|
|
{
|
|
if(enabled)
|
|
port->unused[0] |= 1;
|
|
else
|
|
port->unused[0] &= ~1;
|
|
}
|
|
|
|
|
|
#ifdef SUPPORT_SYSRQ
|
|
static struct console ks8695_console;
|
|
#endif
|
|
|
|
static void ks8695uart_stop_tx(struct uart_port *port)
|
|
{
|
|
if (tx_enabled(port)) {
|
|
/* use disable_irq_nosync() and not disable_irq() to avoid self
|
|
* imposed deadlock by not waiting for irq handler to end,
|
|
* since this ks8695uart_stop_tx() is called from interrupt context.
|
|
*/
|
|
disable_irq_nosync(KS8695_IRQ_UART_TX);
|
|
tx_enable(port, 0);
|
|
}
|
|
}
|
|
|
|
static void ks8695uart_start_tx(struct uart_port *port)
|
|
{
|
|
if (!tx_enabled(port)) {
|
|
enable_irq(KS8695_IRQ_UART_TX);
|
|
tx_enable(port, 1);
|
|
}
|
|
}
|
|
|
|
static void ks8695uart_stop_rx(struct uart_port *port)
|
|
{
|
|
if (rx_enabled(port)) {
|
|
disable_irq(KS8695_IRQ_UART_RX);
|
|
rx_enable(port, 0);
|
|
}
|
|
}
|
|
|
|
static void ks8695uart_enable_ms(struct uart_port *port)
|
|
{
|
|
if (!ms_enabled(port)) {
|
|
enable_irq(KS8695_IRQ_UART_MODEM_STATUS);
|
|
ms_enable(port,1);
|
|
}
|
|
}
|
|
|
|
static void ks8695uart_disable_ms(struct uart_port *port)
|
|
{
|
|
if (ms_enabled(port)) {
|
|
disable_irq(KS8695_IRQ_UART_MODEM_STATUS);
|
|
ms_enable(port,0);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id)
|
|
{
|
|
struct uart_port *port = dev_id;
|
|
unsigned int status, ch, lsr, flg, max_count = 256;
|
|
|
|
status = UART_GET_LSR(port); /* clears pending LSR interrupts */
|
|
while ((status & URLS_URDR) && max_count--) {
|
|
ch = UART_GET_CHAR(port);
|
|
flg = TTY_NORMAL;
|
|
|
|
port->icount.rx++;
|
|
|
|
/*
|
|
* Note that the error handling code is
|
|
* out of the main execution path
|
|
*/
|
|
lsr = UART_GET_LSR(port) | UART_DUMMY_LSR_RX;
|
|
if (unlikely(lsr & (URLS_URBI | URLS_URPE | URLS_URFE | URLS_URROE))) {
|
|
if (lsr & URLS_URBI) {
|
|
lsr &= ~(URLS_URFE | URLS_URPE);
|
|
port->icount.brk++;
|
|
if (uart_handle_break(port))
|
|
goto ignore_char;
|
|
}
|
|
if (lsr & URLS_URPE)
|
|
port->icount.parity++;
|
|
if (lsr & URLS_URFE)
|
|
port->icount.frame++;
|
|
if (lsr & URLS_URROE)
|
|
port->icount.overrun++;
|
|
|
|
lsr &= port->read_status_mask;
|
|
|
|
if (lsr & URLS_URBI)
|
|
flg = TTY_BREAK;
|
|
else if (lsr & URLS_URPE)
|
|
flg = TTY_PARITY;
|
|
else if (lsr & URLS_URFE)
|
|
flg = TTY_FRAME;
|
|
}
|
|
|
|
if (uart_handle_sysrq_char(port, ch))
|
|
goto ignore_char;
|
|
|
|
uart_insert_char(port, lsr, URLS_URROE, ch, flg);
|
|
|
|
ignore_char:
|
|
status = UART_GET_LSR(port);
|
|
}
|
|
tty_flip_buffer_push(&port->state->port);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
static irqreturn_t ks8695uart_tx_chars(int irq, void *dev_id)
|
|
{
|
|
struct uart_port *port = dev_id;
|
|
struct circ_buf *xmit = &port->state->xmit;
|
|
unsigned int count;
|
|
|
|
if (port->x_char) {
|
|
KS8695_CLR_TX_INT();
|
|
UART_PUT_CHAR(port, port->x_char);
|
|
port->icount.tx++;
|
|
port->x_char = 0;
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
if (uart_tx_stopped(port) || uart_circ_empty(xmit)) {
|
|
ks8695uart_stop_tx(port);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
count = 16; /* fifo size */
|
|
while (!uart_circ_empty(xmit) && (count-- > 0)) {
|
|
KS8695_CLR_TX_INT();
|
|
UART_PUT_CHAR(port, xmit->buf[xmit->tail]);
|
|
|
|
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
|
|
port->icount.tx++;
|
|
}
|
|
|
|
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
|
|
uart_write_wakeup(port);
|
|
|
|
if (uart_circ_empty(xmit))
|
|
ks8695uart_stop_tx(port);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t ks8695uart_modem_status(int irq, void *dev_id)
|
|
{
|
|
struct uart_port *port = dev_id;
|
|
unsigned int status;
|
|
|
|
/*
|
|
* clear modem interrupt by reading MSR
|
|
*/
|
|
status = UART_GET_MSR(port);
|
|
|
|
if (status & URMS_URDDCD)
|
|
uart_handle_dcd_change(port, status & URMS_URDDCD);
|
|
|
|
if (status & URMS_URDDST)
|
|
port->icount.dsr++;
|
|
|
|
if (status & URMS_URDCTS)
|
|
uart_handle_cts_change(port, status & URMS_URDCTS);
|
|
|
|
if (status & URMS_URTERI)
|
|
port->icount.rng++;
|
|
|
|
wake_up_interruptible(&port->state->port.delta_msr_wait);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static unsigned int ks8695uart_tx_empty(struct uart_port *port)
|
|
{
|
|
return (UART_GET_LSR(port) & URLS_URTE) ? TIOCSER_TEMT : 0;
|
|
}
|
|
|
|
static unsigned int ks8695uart_get_mctrl(struct uart_port *port)
|
|
{
|
|
unsigned int result = 0;
|
|
unsigned int status;
|
|
|
|
status = UART_GET_MSR(port);
|
|
if (status & URMS_URDCD)
|
|
result |= TIOCM_CAR;
|
|
if (status & URMS_URDSR)
|
|
result |= TIOCM_DSR;
|
|
if (status & URMS_URCTS)
|
|
result |= TIOCM_CTS;
|
|
if (status & URMS_URRI)
|
|
result |= TIOCM_RI;
|
|
|
|
return result;
|
|
}
|
|
|
|
static void ks8695uart_set_mctrl(struct uart_port *port, u_int mctrl)
|
|
{
|
|
unsigned int mcr;
|
|
|
|
mcr = UART_GET_MCR(port);
|
|
if (mctrl & TIOCM_RTS)
|
|
mcr |= URMC_URRTS;
|
|
else
|
|
mcr &= ~URMC_URRTS;
|
|
|
|
if (mctrl & TIOCM_DTR)
|
|
mcr |= URMC_URDTR;
|
|
else
|
|
mcr &= ~URMC_URDTR;
|
|
|
|
UART_PUT_MCR(port, mcr);
|
|
}
|
|
|
|
static void ks8695uart_break_ctl(struct uart_port *port, int break_state)
|
|
{
|
|
unsigned int lcr;
|
|
|
|
lcr = UART_GET_LCR(port);
|
|
|
|
if (break_state == -1)
|
|
lcr |= URLC_URSBC;
|
|
else
|
|
lcr &= ~URLC_URSBC;
|
|
|
|
UART_PUT_LCR(port, lcr);
|
|
}
|
|
|
|
static int ks8695uart_startup(struct uart_port *port)
|
|
{
|
|
int retval;
|
|
|
|
irq_modify_status(KS8695_IRQ_UART_TX, IRQ_NOREQUEST, IRQ_NOAUTOEN);
|
|
tx_enable(port, 0);
|
|
rx_enable(port, 1);
|
|
ms_enable(port, 1);
|
|
|
|
/*
|
|
* Allocate the IRQ
|
|
*/
|
|
retval = request_irq(KS8695_IRQ_UART_TX, ks8695uart_tx_chars, 0, "UART TX", port);
|
|
if (retval)
|
|
goto err_tx;
|
|
|
|
retval = request_irq(KS8695_IRQ_UART_RX, ks8695uart_rx_chars, 0, "UART RX", port);
|
|
if (retval)
|
|
goto err_rx;
|
|
|
|
retval = request_irq(KS8695_IRQ_UART_LINE_STATUS, ks8695uart_rx_chars, 0, "UART LineStatus", port);
|
|
if (retval)
|
|
goto err_ls;
|
|
|
|
retval = request_irq(KS8695_IRQ_UART_MODEM_STATUS, ks8695uart_modem_status, 0, "UART ModemStatus", port);
|
|
if (retval)
|
|
goto err_ms;
|
|
|
|
return 0;
|
|
|
|
err_ms:
|
|
free_irq(KS8695_IRQ_UART_LINE_STATUS, port);
|
|
err_ls:
|
|
free_irq(KS8695_IRQ_UART_RX, port);
|
|
err_rx:
|
|
free_irq(KS8695_IRQ_UART_TX, port);
|
|
err_tx:
|
|
return retval;
|
|
}
|
|
|
|
static void ks8695uart_shutdown(struct uart_port *port)
|
|
{
|
|
/*
|
|
* Free the interrupt
|
|
*/
|
|
free_irq(KS8695_IRQ_UART_RX, port);
|
|
free_irq(KS8695_IRQ_UART_TX, port);
|
|
free_irq(KS8695_IRQ_UART_MODEM_STATUS, port);
|
|
free_irq(KS8695_IRQ_UART_LINE_STATUS, port);
|
|
|
|
/* disable break condition and fifos */
|
|
UART_PUT_LCR(port, UART_GET_LCR(port) & ~URLC_URSBC);
|
|
UART_PUT_FCR(port, UART_GET_FCR(port) & ~URFC_URFE);
|
|
}
|
|
|
|
static void ks8695uart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old)
|
|
{
|
|
unsigned int lcr, fcr = 0;
|
|
unsigned long flags;
|
|
unsigned int baud, quot;
|
|
|
|
/*
|
|
* Ask the core to calculate the divisor for us.
|
|
*/
|
|
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
|
|
quot = uart_get_divisor(port, baud);
|
|
|
|
switch (termios->c_cflag & CSIZE) {
|
|
case CS5:
|
|
lcr = URCL_5;
|
|
break;
|
|
case CS6:
|
|
lcr = URCL_6;
|
|
break;
|
|
case CS7:
|
|
lcr = URCL_7;
|
|
break;
|
|
default:
|
|
lcr = URCL_8;
|
|
break;
|
|
}
|
|
|
|
/* stop bits */
|
|
if (termios->c_cflag & CSTOPB)
|
|
lcr |= URLC_URSB;
|
|
|
|
/* parity */
|
|
if (termios->c_cflag & PARENB) {
|
|
if (termios->c_cflag & CMSPAR) { /* Mark or Space parity */
|
|
if (termios->c_cflag & PARODD)
|
|
lcr |= URPE_MARK;
|
|
else
|
|
lcr |= URPE_SPACE;
|
|
}
|
|
else if (termios->c_cflag & PARODD)
|
|
lcr |= URPE_ODD;
|
|
else
|
|
lcr |= URPE_EVEN;
|
|
}
|
|
|
|
if (port->fifosize > 1)
|
|
fcr = URFC_URFRT_8 | URFC_URTFR | URFC_URRFR | URFC_URFE;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
|
|
/*
|
|
* Update the per-port timeout.
|
|
*/
|
|
uart_update_timeout(port, termios->c_cflag, baud);
|
|
|
|
port->read_status_mask = URLS_URROE;
|
|
if (termios->c_iflag & INPCK)
|
|
port->read_status_mask |= (URLS_URFE | URLS_URPE);
|
|
if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
|
|
port->read_status_mask |= URLS_URBI;
|
|
|
|
/*
|
|
* Characters to ignore
|
|
*/
|
|
port->ignore_status_mask = 0;
|
|
if (termios->c_iflag & IGNPAR)
|
|
port->ignore_status_mask |= (URLS_URFE | URLS_URPE);
|
|
if (termios->c_iflag & IGNBRK) {
|
|
port->ignore_status_mask |= URLS_URBI;
|
|
/*
|
|
* If we're ignoring parity and break indicators,
|
|
* ignore overruns too (for real raw support).
|
|
*/
|
|
if (termios->c_iflag & IGNPAR)
|
|
port->ignore_status_mask |= URLS_URROE;
|
|
}
|
|
|
|
/*
|
|
* Ignore all characters if CREAD is not set.
|
|
*/
|
|
if ((termios->c_cflag & CREAD) == 0)
|
|
port->ignore_status_mask |= UART_DUMMY_LSR_RX;
|
|
|
|
/* first, disable everything */
|
|
if (UART_ENABLE_MS(port, termios->c_cflag))
|
|
ks8695uart_enable_ms(port);
|
|
else
|
|
ks8695uart_disable_ms(port);
|
|
|
|
/* Set baud rate */
|
|
UART_PUT_BRDR(port, quot);
|
|
|
|
UART_PUT_LCR(port, lcr);
|
|
UART_PUT_FCR(port, fcr);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
static const char *ks8695uart_type(struct uart_port *port)
|
|
{
|
|
return port->type == PORT_KS8695 ? "KS8695" : NULL;
|
|
}
|
|
|
|
/*
|
|
* Release the memory region(s) being used by 'port'
|
|
*/
|
|
static void ks8695uart_release_port(struct uart_port *port)
|
|
{
|
|
release_mem_region(port->mapbase, UART_PORT_SIZE);
|
|
}
|
|
|
|
/*
|
|
* Request the memory region(s) being used by 'port'
|
|
*/
|
|
static int ks8695uart_request_port(struct uart_port *port)
|
|
{
|
|
return request_mem_region(port->mapbase, UART_PORT_SIZE,
|
|
"serial_ks8695") != NULL ? 0 : -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* Configure/autoconfigure the port.
|
|
*/
|
|
static void ks8695uart_config_port(struct uart_port *port, int flags)
|
|
{
|
|
if (flags & UART_CONFIG_TYPE) {
|
|
port->type = PORT_KS8695;
|
|
ks8695uart_request_port(port);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* verify the new serial_struct (for TIOCSSERIAL).
|
|
*/
|
|
static int ks8695uart_verify_port(struct uart_port *port, struct serial_struct *ser)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (ser->type != PORT_UNKNOWN && ser->type != PORT_KS8695)
|
|
ret = -EINVAL;
|
|
if (ser->irq != port->irq)
|
|
ret = -EINVAL;
|
|
if (ser->baud_base < 9600)
|
|
ret = -EINVAL;
|
|
return ret;
|
|
}
|
|
|
|
static struct uart_ops ks8695uart_pops = {
|
|
.tx_empty = ks8695uart_tx_empty,
|
|
.set_mctrl = ks8695uart_set_mctrl,
|
|
.get_mctrl = ks8695uart_get_mctrl,
|
|
.stop_tx = ks8695uart_stop_tx,
|
|
.start_tx = ks8695uart_start_tx,
|
|
.stop_rx = ks8695uart_stop_rx,
|
|
.enable_ms = ks8695uart_enable_ms,
|
|
.break_ctl = ks8695uart_break_ctl,
|
|
.startup = ks8695uart_startup,
|
|
.shutdown = ks8695uart_shutdown,
|
|
.set_termios = ks8695uart_set_termios,
|
|
.type = ks8695uart_type,
|
|
.release_port = ks8695uart_release_port,
|
|
.request_port = ks8695uart_request_port,
|
|
.config_port = ks8695uart_config_port,
|
|
.verify_port = ks8695uart_verify_port,
|
|
};
|
|
|
|
static struct uart_port ks8695uart_ports[SERIAL_KS8695_NR] = {
|
|
{
|
|
.membase = KS8695_UART_VA,
|
|
.mapbase = KS8695_UART_PA,
|
|
.iotype = SERIAL_IO_MEM,
|
|
.irq = KS8695_IRQ_UART_TX,
|
|
.uartclk = KS8695_CLOCK_RATE * 16,
|
|
.fifosize = 16,
|
|
.ops = &ks8695uart_pops,
|
|
.flags = UPF_BOOT_AUTOCONF,
|
|
.line = 0,
|
|
}
|
|
};
|
|
|
|
#ifdef CONFIG_SERIAL_KS8695_CONSOLE
|
|
static void ks8695_console_putchar(struct uart_port *port, int ch)
|
|
{
|
|
while (!(UART_GET_LSR(port) & URLS_URTHRE))
|
|
barrier();
|
|
|
|
UART_PUT_CHAR(port, ch);
|
|
}
|
|
|
|
static void ks8695_console_write(struct console *co, const char *s, u_int count)
|
|
{
|
|
struct uart_port *port = ks8695uart_ports + co->index;
|
|
|
|
uart_console_write(port, s, count, ks8695_console_putchar);
|
|
}
|
|
|
|
static void __init ks8695_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits)
|
|
{
|
|
unsigned int lcr;
|
|
|
|
lcr = UART_GET_LCR(port);
|
|
|
|
switch (lcr & URLC_PARITY) {
|
|
case URPE_ODD:
|
|
*parity = 'o';
|
|
break;
|
|
case URPE_EVEN:
|
|
*parity = 'e';
|
|
break;
|
|
default:
|
|
*parity = 'n';
|
|
}
|
|
|
|
switch (lcr & URLC_URCL) {
|
|
case URCL_5:
|
|
*bits = 5;
|
|
break;
|
|
case URCL_6:
|
|
*bits = 6;
|
|
break;
|
|
case URCL_7:
|
|
*bits = 7;
|
|
break;
|
|
default:
|
|
*bits = 8;
|
|
}
|
|
|
|
*baud = port->uartclk / (UART_GET_BRDR(port) & 0x0FFF);
|
|
*baud /= 16;
|
|
*baud &= 0xFFFFFFF0;
|
|
}
|
|
|
|
static int __init ks8695_console_setup(struct console *co, char *options)
|
|
{
|
|
struct uart_port *port;
|
|
int baud = 115200;
|
|
int bits = 8;
|
|
int parity = 'n';
|
|
int flow = 'n';
|
|
|
|
/*
|
|
* Check whether an invalid uart number has been specified, and
|
|
* if so, search for the first available port that does have
|
|
* console support.
|
|
*/
|
|
port = uart_get_console(ks8695uart_ports, SERIAL_KS8695_NR, co);
|
|
|
|
if (options)
|
|
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
|
else
|
|
ks8695_console_get_options(port, &baud, &parity, &bits);
|
|
|
|
return uart_set_options(port, co, baud, parity, bits, flow);
|
|
}
|
|
|
|
static struct uart_driver ks8695_reg;
|
|
|
|
static struct console ks8695_console = {
|
|
.name = SERIAL_KS8695_DEVNAME,
|
|
.write = ks8695_console_write,
|
|
.device = uart_console_device,
|
|
.setup = ks8695_console_setup,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
.data = &ks8695_reg,
|
|
};
|
|
|
|
static int __init ks8695_console_init(void)
|
|
{
|
|
add_preferred_console(SERIAL_KS8695_DEVNAME, 0, NULL);
|
|
register_console(&ks8695_console);
|
|
return 0;
|
|
}
|
|
|
|
console_initcall(ks8695_console_init);
|
|
|
|
#define KS8695_CONSOLE &ks8695_console
|
|
#else
|
|
#define KS8695_CONSOLE NULL
|
|
#endif
|
|
|
|
static struct uart_driver ks8695_reg = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "serial_ks8695",
|
|
.dev_name = SERIAL_KS8695_DEVNAME,
|
|
.major = SERIAL_KS8695_MAJOR,
|
|
.minor = SERIAL_KS8695_MINOR,
|
|
.nr = SERIAL_KS8695_NR,
|
|
.cons = KS8695_CONSOLE,
|
|
};
|
|
|
|
static int __init ks8695uart_init(void)
|
|
{
|
|
int i, ret;
|
|
|
|
printk(KERN_INFO "Serial: Micrel KS8695 UART driver\n");
|
|
|
|
ret = uart_register_driver(&ks8695_reg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (i = 0; i < SERIAL_KS8695_NR; i++)
|
|
uart_add_one_port(&ks8695_reg, &ks8695uart_ports[0]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ks8695uart_exit(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < SERIAL_KS8695_NR; i++)
|
|
uart_remove_one_port(&ks8695_reg, &ks8695uart_ports[0]);
|
|
uart_unregister_driver(&ks8695_reg);
|
|
}
|
|
|
|
module_init(ks8695uart_init);
|
|
module_exit(ks8695uart_exit);
|
|
|
|
MODULE_DESCRIPTION("KS8695 serial port driver");
|
|
MODULE_AUTHOR("Micrel Inc.");
|
|
MODULE_LICENSE("GPL");
|