wifipineapple-openwrt/target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c

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/*
* drivers/serial/ubi32_serdes.c
* Ubicom32 On-Chip Serial Driver
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port 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.
*
* The Ubicom32 Linux Kernel Port is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*
* Ubicom32 implementation derived from (with many thanks):
* arch/m68knommu
* arch/blackfin
* arch/parisc
*/
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/platform_device.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <asm/ip5000.h>
#include <asm/ubicom32suart.h>
#define SERIAL_UBICOM_PIN_RXD (1 << 0)
#define SERIAL_UBICOM_PIN_TXD (1 << 6)
#define SERIAL_UBICOM_CTL0 0x8b300000
#define SERIAL_UBICOM_CTL1 0x00000009
#define SERIAL_UBICOM_DATA_BIT 8 /* Fixed parameter - do not change */
#define SERIAL_UBICOM_PAR_BIT 0 /* Fixed parameter - do not change */
#define SERIAL_UBICOM_STOP_BIT 1 /* Fixed parameter - do not change */
/* UART name and device definitions */
#define UBI32_SERDES_NAME "ttyUS" // XXX
#define UBI32_SERDES_MAJOR 206 // XXX
#define UBI32_SERDES_MINOR 64 // XXX
#define PORT_UBI32_SERDES 1234
#define NR_PORTS 1
struct uart_port ubi32_serdes_ports[NR_PORTS];
struct ubi32_serdes_resource {
void *uart_base_addr;
int uart_irq;
int uart_clock;
} ubi32_serdes_resource[NR_PORTS] = {
/*
* Get params from kernel command line (required for early printk)
* or from platform resources.
*/
{0, 0, 0}
};
/*
* Can get overridden by 'serdes=' kernel command line.
*/
static int ubi32_serdes_default_baud_rate = 115200;
#define IO_PORT(port) ((struct ubicom32_io_port *)port->membase)
#define IO_PORT_INT_STATUS(port) (IO_PORT(port)->int_status)
#define IO_PORT_INT_MASK(port) (IO_PORT(port)->int_mask)
#define IO_PORT_INT_CLR(port) (IO_PORT(port)->int_clr)
/*
* ubi32_serdes_get_char()
*/
static u8_t ubi32_serdes_get_char(struct ubicom32_io_port *io_port)
{
/*
* Read from hardware (forced 32-bit atomic read).
*/
u32_t data = 0;
if ( io_port ) {
io_port->int_clr = IO_PORTX_INT_SERDES_RXBF;
asm volatile (
"move.4 %0, %1 \n\t"
: "=r" (data)
: "m" (*(u32_t *)&(io_port->rx_fifo))
);
}
return (u8_t)(data & 0x000000ff);
}
/*
* ubi32_serdes_put_char()
*/
static void ubi32_serdes_put_char(struct ubicom32_io_port *io_port, u8_t c)
{
u32_t data = 0x0000fe00 | (c << 1);
if ( io_port ) {
/*
* Fixed data format:
* [LSB]1 start bit - 8 data bits - no parity - 1 stop bit[MSB]
*/
io_port->int_clr = IO_PORTX_INT_SERDES_TXBE;
io_port->ctl2 = data;
io_port->int_set = IO_PORTX_INT_SERDES_TXBUF_VALID;
}
}
static void ubi32_serdes_hw_init(struct uart_port *port, int baud)
{
struct ubicom32_io_port *io_port = IO_PORT(port);
if ( io_port ) {
/*
* Put port functions 1-4 into reset state.
* Function 0 (GPIO) does not need or have a reset bit.
*
* Select SERDES function for restart below.
*/
io_port->function =
IO_FUNC_FUNCTION_RESET(1) | IO_FUNC_FUNCTION_RESET(2) |
IO_FUNC_FUNCTION_RESET(3) | IO_FUNC_FUNCTION_RESET(4) |
IO_PORTX_FUNC_SERDES;
/*
* Configure SERDES baudrate
*/
if ( baud == 0 ) {
baud = ubi32_serdes_default_baud_rate;
}
io_port->ctl0 =
SERIAL_UBICOM_CTL0 |
((port->uartclk / (16 * baud)) - 1);
io_port->ctl1 =
SERIAL_UBICOM_CTL1;
/*
* don't interrupt until startup and start_tx
*/
io_port->int_mask = 0;
/*
* Set TXD pin output, RXD input and prevent GPIO
* override on the TXD & RXD pins
*/
io_port->gpio_ctl &= ~SERIAL_UBICOM_PIN_RXD;
io_port->gpio_ctl |= SERIAL_UBICOM_PIN_TXD;
io_port->gpio_mask &= ~(SERIAL_UBICOM_PIN_RXD | SERIAL_UBICOM_PIN_TXD);
/*
* Restart (un-reset) the port's SERDES function.
*/
io_port->function &= ~(IO_FUNC_FUNCTION_RESET(IO_PORTX_FUNC_SERDES));
}
}
#define ULITE_STATUS_RXVALID IO_PORTX_INT_SERDES_RXBF
#define ULITE_STATUS_OVERRUN 0
#define ULITE_STATUS_FRAME 0
#define ULITE_STATUS_PARITY 0
#define ULITE_STATUS_TXEMPTY IO_PORTX_INT_SERDES_TXBE
#define ULITE_STATUS_TXFULL 0
static int ubi32_serdes_receive(struct uart_port *port, int stat)
{
struct tty_struct *tty = port->info->port.tty;
unsigned char ch = 0;
char flag = TTY_NORMAL;
if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
| ULITE_STATUS_FRAME)) == 0)
return 0;
/* stats */
if (stat & ULITE_STATUS_RXVALID) {
port->icount.rx++;
ch = ubi32_serdes_get_char((struct ubicom32_io_port *)port->membase);
if (stat & ULITE_STATUS_PARITY)
port->icount.parity++;
}
if (stat & ULITE_STATUS_OVERRUN)
port->icount.overrun++;
if (stat & ULITE_STATUS_FRAME)
port->icount.frame++;
/* drop byte with parity error if IGNPAR specificed */
if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY)
stat &= ~ULITE_STATUS_RXVALID;
stat &= port->read_status_mask;
if (stat & ULITE_STATUS_PARITY)
flag = TTY_PARITY;
stat &= ~port->ignore_status_mask;
if (stat & ULITE_STATUS_RXVALID)
tty_insert_flip_char(tty, ch, flag);
if (stat & ULITE_STATUS_FRAME)
tty_insert_flip_char(tty, 0, TTY_FRAME);
if (stat & ULITE_STATUS_OVERRUN)
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
return 1;
}
/*
* interrupts are disabled on entry
*/
static void ubi32_serdes_stop_tx(struct uart_port *port)
{
IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) & ~IO_PORTX_INT_SERDES_TXBE;
}
static int ubi32_serdes_transmit(struct uart_port *port, int stat)
{
struct circ_buf *xmit = &port->info->xmit;
if (!(stat & IO_PORTX_INT_SERDES_TXBE))
return 0;
if (port->x_char) {
ubi32_serdes_put_char(IO_PORT(port), port->x_char);
port->x_char = 0;
port->icount.tx++;
return 1;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
ubi32_serdes_stop_tx(port);
return 0;
}
ubi32_serdes_put_char(IO_PORT(port), xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
port->icount.tx++;
/* wake up */
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (uart_circ_empty(xmit))
ubi32_serdes_stop_tx(port);
return 1;
}
/*
* port is locked and interrupts are disabled
*/
static void ubi32_serdes_start_tx(struct uart_port *port)
{
IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) | IO_PORTX_INT_SERDES_TXBE;
ubi32_serdes_transmit(port, IO_PORT_INT_STATUS(port));
}
/*
* Interrupts are enabled
*/
static void ubi32_serdes_stop_rx(struct uart_port *port)
{
/* don't forward any more data (like !CREAD) */
port->ignore_status_mask = IO_PORTX_INT_SERDES_RXBF;
}
/*
* Set the modem control timer to fire immediately.
*/
static void ubi32_serdes_enable_ms(struct uart_port *port)
{
/* N/A */
}
static irqreturn_t ubi32_serdes_isr(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
int busy;
spin_lock(&port->lock);
do {
int stat = IO_PORT_INT_STATUS(port);
busy = ubi32_serdes_receive(port, stat);
busy |= ubi32_serdes_transmit(port, stat);
} while (busy);
tty_flip_buffer_push(port->info->port.tty);
spin_unlock(&port->lock);
return IRQ_HANDLED;
}
/*
* Return TIOCSER_TEMT when transmitter is not busy.
*/
static unsigned int ubi32_serdes_tx_empty(struct uart_port *port)
{
unsigned long flags;
unsigned int ret;
spin_lock_irqsave(&port->lock, flags);
ret = IO_PORT_INT_STATUS(port);
spin_unlock_irqrestore(&port->lock, flags);
return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0;
}
static unsigned int ubi32_serdes_get_mctrl(struct uart_port *port)
{
return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
}
static void ubi32_serdes_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
/* N/A */
}
/*
* Interrupts are always disabled.
*/
static void ubi32_serdes_break_ctl(struct uart_port *port, int break_state)
{
/* N/A */
}
static int ubi32_serdes_startup(struct uart_port *port)
{
if (request_irq(port->irq, ubi32_serdes_isr, IRQF_DISABLED,
"UBI32_SERDES", port)) {
printk(KERN_NOTICE "Unable to attach port interrupt\n");
return -EBUSY;
}
IO_PORT_INT_CLR(port) = IO_PORTX_INT_SERDES_RXBF;
IO_PORT_INT_MASK(port) = IO_PORTX_INT_SERDES_RXBF;
return 0;
}
static void ubi32_serdes_shutdown(struct uart_port *port)
{
struct ubi32_serdes_port *uart = (struct ubi32_serdes_port *)port;
IO_PORT_INT_MASK(port) = 0;
free_irq(port->irq, uart);
}
static void
ubi32_serdes_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
unsigned long flags;
unsigned int baud;
spin_lock_irqsave(&port->lock, flags);
port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
| ULITE_STATUS_TXFULL;
if (termios->c_iflag & INPCK)
port->read_status_mask |=
ULITE_STATUS_PARITY | ULITE_STATUS_FRAME;
port->ignore_status_mask = 0;
if (termios->c_iflag & IGNPAR)
port->ignore_status_mask |= ULITE_STATUS_PARITY
| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
/* ignore all characters if CREAD is not set */
if ((termios->c_cflag & CREAD) == 0)
port->ignore_status_mask |=
ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY
| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
/* update timeout */
baud = uart_get_baud_rate(port, termios, old, 0, 460800);
uart_update_timeout(port, termios->c_cflag, baud);
IO_PORT(port)->ctl0 = SERIAL_UBICOM_CTL0 |
((port->uartclk / (16 * baud)) - 1);
spin_unlock_irqrestore(&port->lock, flags);
}
static const char *ubi32_serdes_type(struct uart_port *port)
{
return port->type == PORT_UBI32_SERDES ? "UBI32_SERDES" : NULL;
}
/*
* Release the memory region(s) being used by 'port'.
*/
static void ubi32_serdes_release_port(struct uart_port *port)
{
}
/*
* Request the memory region(s) being used by 'port'.
*/
static int ubi32_serdes_request_port(struct uart_port *port)
{
return 0;
}
/*
* Configure/autoconfigure the port.
*/
static void ubi32_serdes_config_port(struct uart_port *port, int flags)
{
if (flags & UART_CONFIG_TYPE &&
ubi32_serdes_request_port(port) == 0)
port->type = PORT_UBI32_SERDES;
}
/*
* Verify the new serial_struct (for TIOCSSERIAL).
* The only change we allow are to the flags and type, and
* even then only between PORT_UBI32_SERDES and PORT_UNKNOWN
*/
static int
ubi32_serdes_verify_port(struct uart_port *port, struct serial_struct *ser)
{
return 0;
}
static struct uart_ops ubi32_serdes_pops = {
.tx_empty = ubi32_serdes_tx_empty,
.set_mctrl = ubi32_serdes_set_mctrl,
.get_mctrl = ubi32_serdes_get_mctrl,
.stop_tx = ubi32_serdes_stop_tx,
.start_tx = ubi32_serdes_start_tx,
.stop_rx = ubi32_serdes_stop_rx,
.enable_ms = ubi32_serdes_enable_ms,
.break_ctl = ubi32_serdes_break_ctl,
.startup = ubi32_serdes_startup,
.shutdown = ubi32_serdes_shutdown,
.set_termios = ubi32_serdes_set_termios,
.type = ubi32_serdes_type,
.release_port = ubi32_serdes_release_port,
.request_port = ubi32_serdes_request_port,
.config_port = ubi32_serdes_config_port,
.verify_port = ubi32_serdes_verify_port,
};
static void __init ubi32_serdes_init_ports(void)
{
int i;
for (i = 0; i < NR_PORTS; i++) {
ubi32_serdes_ports[i].uartclk = ubi32_serdes_resource[i].uart_clock;
ubi32_serdes_ports[i].ops = &ubi32_serdes_pops;
ubi32_serdes_ports[i].line = i;
ubi32_serdes_ports[i].iotype = UPIO_MEM;
ubi32_serdes_ports[i].membase =
(void __iomem *)ubi32_serdes_resource[i].uart_base_addr;
ubi32_serdes_ports[i].mapbase =
(resource_size_t)ubi32_serdes_resource[i].uart_base_addr;
ubi32_serdes_ports[i].irq =
ubi32_serdes_resource[i].uart_irq;
ubi32_serdes_ports[i].flags = UPF_BOOT_AUTOCONF;
ubi32_serdes_hw_init(&ubi32_serdes_ports[i], 0);
}
}
#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
/*
* If the port was already initialised (eg, by a boot loader),
* try to determine the current setup.
*/
static void __init
ubi32_serdes_console_get_options(struct uart_port *port, int *baud)
{
u32 round_to = 1200;
u32 real_baud;
/*
* We might get called before platform init and with no
* kernel command line options, so port might be NULL.
*/
*baud = ubi32_serdes_default_baud_rate;;
if ( IO_PORT(port) == 0 )
return;
real_baud = port->uartclk
/ (16 * ((IO_PORT(port)->ctl0 & ~SERIAL_UBICOM_CTL0) + 1));
*baud = ((real_baud + round_to - 1) / round_to) * round_to;
pr_debug("%s:baud = %d, real_baud = %d\n", __FUNCTION__, *baud, real_baud);
}
#endif
#if defined(CONFIG_SERIAL_UBI32_SERDES_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
static struct uart_driver ubi32_serdes_reg;
static int __init
ubi32_serdes_console_setup(struct console *co, char *options)
{
struct uart_port *port;
#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
int baud = ubi32_serdes_default_baud_rate;
int bits = 8;
int parity = 'n';
int flow = 'n';
#endif
/*
* Check whether an invalid uart number has been specified, and
* if so, search for the first available port that does have
* console support.
*/
if (co->index == -1 || co->index >= NR_PORTS)
co->index = 0;
port = &ubi32_serdes_ports[co->index];
#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
if (options) {
uart_parse_options(options, &baud, &parity, &bits, &flow);
ubi32_serdes_hw_init(port, baud);
}
else
ubi32_serdes_console_get_options(port, &baud);
return uart_set_options(port, co, baud, parity, bits, flow);
#else
return 0;
#endif
}
#endif /* defined (CONFIG_SERIAL_UBI32_SERDES_CONSOLE) ||
defined (CONFIG_EARLY_PRINTK) */
#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
static void
ubi32_serdes_console_putchar(struct uart_port *port, int ch)
{
if ( IO_PORT(port) ) {
while (!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE))
barrier();
ubi32_serdes_put_char(IO_PORT(port), ch);
}
}
/*
* Interrupts are disabled on entering
*/
static void
ubi32_serdes_console_write(struct console *co, const char *s, unsigned int count)
{
struct uart_port *port = &ubi32_serdes_ports[co->index];
unsigned long flags = 0;
spin_lock_irqsave(&port->lock, flags);
uart_console_write(port, s, count, ubi32_serdes_console_putchar);
spin_unlock_irqrestore(&port->lock, flags);
}
static struct console ubi32_serdes_console = {
.name = UBI32_SERDES_NAME,
.write = ubi32_serdes_console_write,
.device = uart_console_device,
.setup = ubi32_serdes_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
.data = &ubi32_serdes_reg,
};
static int __init ubi32_serdes_console_init(void)
{
ubi32_serdes_init_ports();
register_console(&ubi32_serdes_console);
return 0;
}
console_initcall(ubi32_serdes_console_init);
#define UBI32_SERDES_CONSOLE &ubi32_serdes_console
#else
#define UBI32_SERDES_CONSOLE NULL
#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */
#ifdef CONFIG_EARLY_PRINTK
static __init void ubi32_serdes_early_putc(struct uart_port *port, int ch)
{
unsigned timeout = 0xffff;
while ((!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE)) && --timeout)
cpu_relax();
ubi32_serdes_put_char(IO_PORT(port), ch);
}
static __init void ubi32_serdes_early_write(struct console *con, const char *s,
unsigned int n)
{
struct uart_port *port = &ubi32_serdes_ports[con->index];
unsigned int i;
for (i = 0; i < n; i++, s++) {
if (*s == '\n')
ubi32_serdes_early_putc(port, '\r');
ubi32_serdes_early_putc(port, *s);
}
}
static struct __init console ubi32_serdes_early_console = {
.name = "early_US",
.write = ubi32_serdes_early_write,
.device = uart_console_device,
.flags = CON_PRINTBUFFER,
.setup = ubi32_serdes_console_setup,
.index = -1,
.data = &ubi32_serdes_reg,
};
/*
* XXX Unused in our driver. Need to find out what the termios initialization is good/needed for.
*/
struct console __init *ubi32_serdes_early_init(unsigned int port_index,
unsigned int cflag)
{
struct uart_port *uart;
struct ktermios t;
if (port_index == -1 || port_index >= NR_PORTS)
port_index = 0;
ubi32_serdes_init_ports();
ubi32_serdes_early_console.index = port_index;
uart = &ubi32_serdes_ports[port_index];
t.c_cflag = cflag;
t.c_iflag = 0;
t.c_oflag = 0;
t.c_lflag = ICANON;
t.c_line = port_index;
ubi32_serdes_set_termios(uart, &t, &t);
return &ubi32_serdes_early_console;
}
#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */
static struct uart_driver ubi32_serdes_reg = {
.owner = THIS_MODULE,
.driver_name = "ubi32_serdes",
.dev_name = UBI32_SERDES_NAME,
.major = UBI32_SERDES_MAJOR,
.minor = UBI32_SERDES_MINOR,
.nr = NR_PORTS,
.cons = UBI32_SERDES_CONSOLE,
};
static int ubi32_serdes_suspend(struct platform_device *dev, pm_message_t state)
{
struct uart_port *port = platform_get_drvdata(dev);
if (port)
uart_suspend_port(&ubi32_serdes_reg, port);
return 0;
}
static int ubi32_serdes_resume(struct platform_device *dev)
{
struct uart_port *port = platform_get_drvdata(dev);
if (port)
uart_resume_port(&ubi32_serdes_reg, port);
return 0;
}
static int ubi32_serdes_probe(struct platform_device *dev)
{
struct resource *res = dev->resource;
int i;
for (i = 0; i < dev->num_resources; i++, res++) {
if (res->flags & IORESOURCE_MEM) {
ubi32_serdes_resource[0].uart_base_addr = (void *) res->start;
}
else if (res->flags & IORESOURCE_IRQ) {
ubi32_serdes_resource[0].uart_irq = res->start;
}
else if (res->flags & UBICOM32_SUART_IORESOURCE_CLOCK) {
ubi32_serdes_resource[0].uart_clock = res->start;
}
}
ubi32_serdes_init_ports();
return 0;
}
static int ubi32_serdes_remove(struct platform_device *pdev)
{
struct uart_port *port = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
if (port)
uart_remove_one_port(&ubi32_serdes_reg, port);
return 0;
}
static struct platform_driver ubi32_serdes_driver = {
.remove = ubi32_serdes_remove,
.suspend = ubi32_serdes_suspend,
.resume = ubi32_serdes_resume,
.driver = {
.name = "ubicom32suart",
.owner = THIS_MODULE,
},
};
#ifndef MODULE
/*
* Called at boot time.
*
* You can specify IO base, IRQ, and clock for the serdes serial port
* using kernel command line "serdes=0xiobase,irq,clock". Values
* specified will be overwritten by platform device data, if present.
*/
static int __init ubi32_serdes_setup(char *str)
{
#define N_PARMS (4+1)
int ints[N_PARMS];
int i;
str = get_options(str, ARRAY_SIZE(ints), ints);
for (i = 0; i < N_PARMS; i++) {
if (i < ints[0]) {
if (i == 0) {
ubi32_serdes_resource[0].uart_base_addr = (void *) ints[i+1];
}
else if (i == 1) {
ubi32_serdes_resource[0].uart_irq = ints[i+1];
}
else if (i == 2) {
ubi32_serdes_resource[0].uart_clock = ints[i+1];
}
else if (i == 3) {
ubi32_serdes_default_baud_rate = ints[i+1];
}
}
}
return 1;
}
__setup("serdes=", ubi32_serdes_setup);
#endif
static int __init ubi32_serdes_init(void)
{
int ret;
pr_info("Serial: Ubicom32 serdes uart serial driver\n");
ret = platform_driver_probe(&ubi32_serdes_driver, ubi32_serdes_probe);
if (ret != 0) {
printk(KERN_INFO "serdes platform_driver_probe() failed: %d\n", ret);
return ret;
}
ubi32_serdes_init_ports();
ret = uart_register_driver(&ubi32_serdes_reg);
if ( ret == 0 ) {
ret = uart_add_one_port(&ubi32_serdes_reg, &ubi32_serdes_ports[0]);
if ( ret != 0 ) {
uart_unregister_driver(&ubi32_serdes_reg);
}
}
return ret;
}
static void __exit ubi32_serdes_exit(void)
{
platform_driver_unregister(&ubi32_serdes_driver);
uart_unregister_driver(&ubi32_serdes_reg);
}
module_init(ubi32_serdes_init);
module_exit(ubi32_serdes_exit);
MODULE_AUTHOR("Rainer Keller <rkeller@ubicom.com>");
MODULE_DESCRIPTION("Ubicom generic serial port driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CHARDEV_MAJOR(UBI32_SERDES_MAJOR);
MODULE_ALIAS("platform:ubi32_serdes");