--- /dev/null
+/*
+ * Driver for NEC VR4100 series Serial Interface Unit.
+ *
+ * Copyright (C) 2004-2008 Yoichi Yuasa <yuasa@linux-mips.org>
+ *
+ * Based on drivers/serial/8250.c, by Russell King.
+ *
+ * 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/console.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+
+#include <asm/io.h>
+#include <asm/vr41xx/siu.h>
+#include <asm/vr41xx/vr41xx.h>
+
+#define SIU_BAUD_BASE 1152000
+#define SIU_MAJOR 204
+#define SIU_MINOR_BASE 82
+
+#define RX_MAX_COUNT 256
+#define TX_MAX_COUNT 15
+
+#define SIUIRSEL 0x08
+ #define TMICMODE 0x20
+ #define TMICTX 0x10
+ #define IRMSEL 0x0c
+ #define IRMSEL_HP 0x08
+ #define IRMSEL_TEMIC 0x04
+ #define IRMSEL_SHARP 0x00
+ #define IRUSESEL 0x02
+ #define SIRSEL 0x01
+
+static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = {
+ [0 ... SIU_PORTS_MAX-1] = {
+ .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock),
+ .irq = 0,
+ },
+};
+
+#ifdef CONFIG_SERIAL_VR41XX_CONSOLE
+static uint8_t lsr_break_flag[SIU_PORTS_MAX];
+#endif
+
+#define siu_read(port, offset) readb((port)->membase + (offset))
+#define siu_write(port, offset, value) writeb((value), (port)->membase + (offset))
+
+void vr41xx_select_siu_interface(siu_interface_t interface)
+{
+ struct uart_port *port;
+ unsigned long flags;
+ uint8_t irsel;
+
+ port = &siu_uart_ports[0];
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ irsel = siu_read(port, SIUIRSEL);
+ if (interface == SIU_INTERFACE_IRDA)
+ irsel |= SIRSEL;
+ else
+ irsel &= ~SIRSEL;
+ siu_write(port, SIUIRSEL, irsel);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+EXPORT_SYMBOL_GPL(vr41xx_select_siu_interface);
+
+void vr41xx_use_irda(irda_use_t use)
+{
+ struct uart_port *port;
+ unsigned long flags;
+ uint8_t irsel;
+
+ port = &siu_uart_ports[0];
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ irsel = siu_read(port, SIUIRSEL);
+ if (use == FIR_USE_IRDA)
+ irsel |= IRUSESEL;
+ else
+ irsel &= ~IRUSESEL;
+ siu_write(port, SIUIRSEL, irsel);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+EXPORT_SYMBOL_GPL(vr41xx_use_irda);
+
+void vr41xx_select_irda_module(irda_module_t module, irda_speed_t speed)
+{
+ struct uart_port *port;
+ unsigned long flags;
+ uint8_t irsel;
+
+ port = &siu_uart_ports[0];
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ irsel = siu_read(port, SIUIRSEL);
+ irsel &= ~(IRMSEL | TMICTX | TMICMODE);
+ switch (module) {
+ case SHARP_IRDA:
+ irsel |= IRMSEL_SHARP;
+ break;
+ case TEMIC_IRDA:
+ irsel |= IRMSEL_TEMIC | TMICMODE;
+ if (speed == IRDA_TX_4MBPS)
+ irsel |= TMICTX;
+ break;
+ case HP_IRDA:
+ irsel |= IRMSEL_HP;
+ break;
+ default:
+ break;
+ }
+ siu_write(port, SIUIRSEL, irsel);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+EXPORT_SYMBOL_GPL(vr41xx_select_irda_module);
+
+static inline void siu_clear_fifo(struct uart_port *port)
+{
+ siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO);
+ siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
+ UART_FCR_CLEAR_XMIT);
+ siu_write(port, UART_FCR, 0);
+}
+
+static inline unsigned long siu_port_size(struct uart_port *port)
+{
+ switch (port->type) {
+ case PORT_VR41XX_SIU:
+ return 11UL;
+ case PORT_VR41XX_DSIU:
+ return 8UL;
+ }
+
+ return 0;
+}
+
+static inline unsigned int siu_check_type(struct uart_port *port)
+{
+ if (port->line == 0)
+ return PORT_VR41XX_SIU;
+ if (port->line == 1 && port->irq)
+ return PORT_VR41XX_DSIU;
+
+ return PORT_UNKNOWN;
+}
+
+static inline const char *siu_type_name(struct uart_port *port)
+{
+ switch (port->type) {
+ case PORT_VR41XX_SIU:
+ return "SIU";
+ case PORT_VR41XX_DSIU:
+ return "DSIU";
+ }
+
+ return NULL;
+}
+
+static unsigned int siu_tx_empty(struct uart_port *port)
+{
+ uint8_t lsr;
+
+ lsr = siu_read(port, UART_LSR);
+ if (lsr & UART_LSR_TEMT)
+ return TIOCSER_TEMT;
+
+ return 0;
+}
+
+static void siu_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+ uint8_t mcr = 0;
+
+ if (mctrl & TIOCM_DTR)
+ mcr |= UART_MCR_DTR;
+ if (mctrl & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (mctrl & TIOCM_OUT1)
+ mcr |= UART_MCR_OUT1;
+ if (mctrl & TIOCM_OUT2)
+ mcr |= UART_MCR_OUT2;
+ if (mctrl & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+
+ siu_write(port, UART_MCR, mcr);
+}
+
+static unsigned int siu_get_mctrl(struct uart_port *port)
+{
+ uint8_t msr;
+ unsigned int mctrl = 0;
+
+ msr = siu_read(port, UART_MSR);
+ if (msr & UART_MSR_DCD)
+ mctrl |= TIOCM_CAR;
+ if (msr & UART_MSR_RI)
+ mctrl |= TIOCM_RNG;
+ if (msr & UART_MSR_DSR)
+ mctrl |= TIOCM_DSR;
+ if (msr & UART_MSR_CTS)
+ mctrl |= TIOCM_CTS;
+
+ return mctrl;
+}
+
+static void siu_stop_tx(struct uart_port *port)
+{
+ unsigned long flags;
+ uint8_t ier;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ ier = siu_read(port, UART_IER);
+ ier &= ~UART_IER_THRI;
+ siu_write(port, UART_IER, ier);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void siu_start_tx(struct uart_port *port)
+{
+ unsigned long flags;
+ uint8_t ier;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ ier = siu_read(port, UART_IER);
+ ier |= UART_IER_THRI;
+ siu_write(port, UART_IER, ier);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void siu_stop_rx(struct uart_port *port)
+{
+ unsigned long flags;
+ uint8_t ier;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ ier = siu_read(port, UART_IER);
+ ier &= ~UART_IER_RLSI;
+ siu_write(port, UART_IER, ier);
+
+ port->read_status_mask &= ~UART_LSR_DR;
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void siu_enable_ms(struct uart_port *port)
+{
+ unsigned long flags;
+ uint8_t ier;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ ier = siu_read(port, UART_IER);
+ ier |= UART_IER_MSI;
+ siu_write(port, UART_IER, ier);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void siu_break_ctl(struct uart_port *port, int ctl)
+{
+ unsigned long flags;
+ uint8_t lcr;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ lcr = siu_read(port, UART_LCR);
+ if (ctl == -1)
+ lcr |= UART_LCR_SBC;
+ else
+ lcr &= ~UART_LCR_SBC;
+ siu_write(port, UART_LCR, lcr);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static inline void receive_chars(struct uart_port *port, uint8_t *status)
+{
+ uint8_t lsr, ch;
+ char flag;
+ int max_count = RX_MAX_COUNT;
+
+ lsr = *status;
+
+ do {
+ ch = siu_read(port, UART_RX);
+ port->icount.rx++;
+ flag = TTY_NORMAL;
+
+#ifdef CONFIG_SERIAL_VR41XX_CONSOLE
+ lsr |= lsr_break_flag[port->line];
+ lsr_break_flag[port->line] = 0;
+#endif
+ if (unlikely(lsr & (UART_LSR_BI | UART_LSR_FE |
+ UART_LSR_PE | UART_LSR_OE))) {
+ if (lsr & UART_LSR_BI) {
+ lsr &= ~(UART_LSR_FE | UART_LSR_PE);
+ port->icount.brk++;
+
+ if (uart_handle_break(port))
+ goto ignore_char;
+ }
+
+ if (lsr & UART_LSR_FE)
+ port->icount.frame++;
+ if (lsr & UART_LSR_PE)
+ port->icount.parity++;
+ if (lsr & UART_LSR_OE)
+ port->icount.overrun++;
+
+ lsr &= port->read_status_mask;
+ if (lsr & UART_LSR_BI)
+ flag = TTY_BREAK;
+ if (lsr & UART_LSR_FE)
+ flag = TTY_FRAME;
+ if (lsr & UART_LSR_PE)
+ flag = TTY_PARITY;
+ }
+
+ if (uart_handle_sysrq_char(port, ch))
+ goto ignore_char;
+
+ uart_insert_char(port, lsr, UART_LSR_OE, ch, flag);
+
+ ignore_char:
+ lsr = siu_read(port, UART_LSR);
+ } while ((lsr & UART_LSR_DR) && (max_count-- > 0));
+
+ tty_flip_buffer_push(&port->state->port);
+
+ *status = lsr;
+}
+
+static inline void check_modem_status(struct uart_port *port)
+{
+ uint8_t msr;
+
+ msr = siu_read(port, UART_MSR);
+ if ((msr & UART_MSR_ANY_DELTA) == 0)
+ return;
+ if (msr & UART_MSR_DDCD)
+ uart_handle_dcd_change(port, msr & UART_MSR_DCD);
+ if (msr & UART_MSR_TERI)
+ port->icount.rng++;
+ if (msr & UART_MSR_DDSR)
+ port->icount.dsr++;
+ if (msr & UART_MSR_DCTS)
+ uart_handle_cts_change(port, msr & UART_MSR_CTS);
+
+ wake_up_interruptible(&port->state->port.delta_msr_wait);
+}
+
+static inline void transmit_chars(struct uart_port *port)
+{
+ struct circ_buf *xmit;
+ int max_count = TX_MAX_COUNT;
+
+ xmit = &port->state->xmit;
+
+ if (port->x_char) {
+ siu_write(port, UART_TX, port->x_char);
+ port->icount.tx++;
+ port->x_char = 0;
+ return;
+ }
+
+ if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+ siu_stop_tx(port);
+ return;
+ }
+
+ do {
+ siu_write(port, UART_TX, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ port->icount.tx++;
+ if (uart_circ_empty(xmit))
+ break;
+ } while (max_count-- > 0);
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(port);
+
+ if (uart_circ_empty(xmit))
+ siu_stop_tx(port);
+}
+
+static irqreturn_t siu_interrupt(int irq, void *dev_id)
+{
+ struct uart_port *port;
+ uint8_t iir, lsr;
+
+ port = (struct uart_port *)dev_id;
+
+ iir = siu_read(port, UART_IIR);
+ if (iir & UART_IIR_NO_INT)
+ return IRQ_NONE;
+
+ lsr = siu_read(port, UART_LSR);
+ if (lsr & UART_LSR_DR)
+ receive_chars(port, &lsr);
+
+ check_modem_status(port);
+
+ if (lsr & UART_LSR_THRE)
+ transmit_chars(port);
+
+ return IRQ_HANDLED;
+}
+
+static int siu_startup(struct uart_port *port)
+{
+ int retval;
+
+ if (port->membase == NULL)
+ return -ENODEV;
+
+ siu_clear_fifo(port);
+
+ (void)siu_read(port, UART_LSR);
+ (void)siu_read(port, UART_RX);
+ (void)siu_read(port, UART_IIR);
+ (void)siu_read(port, UART_MSR);
+
+ if (siu_read(port, UART_LSR) == 0xff)
+ return -ENODEV;
+
+ retval = request_irq(port->irq, siu_interrupt, 0, siu_type_name(port), port);
+ if (retval)
+ return retval;
+
+ if (port->type == PORT_VR41XX_DSIU)
+ vr41xx_enable_dsiuint(DSIUINT_ALL);
+
+ siu_write(port, UART_LCR, UART_LCR_WLEN8);
+
+ spin_lock_irq(&port->lock);
+ siu_set_mctrl(port, port->mctrl);
+ spin_unlock_irq(&port->lock);
+
+ siu_write(port, UART_IER, UART_IER_RLSI | UART_IER_RDI);
+
+ (void)siu_read(port, UART_LSR);
+ (void)siu_read(port, UART_RX);
+ (void)siu_read(port, UART_IIR);
+ (void)siu_read(port, UART_MSR);
+
+ return 0;
+}
+
+static void siu_shutdown(struct uart_port *port)
+{
+ unsigned long flags;
+ uint8_t lcr;
+
+ siu_write(port, UART_IER, 0);
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ port->mctrl &= ~TIOCM_OUT2;
+ siu_set_mctrl(port, port->mctrl);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ lcr = siu_read(port, UART_LCR);
+ lcr &= ~UART_LCR_SBC;
+ siu_write(port, UART_LCR, lcr);
+
+ siu_clear_fifo(port);
+
+ (void)siu_read(port, UART_RX);
+
+ if (port->type == PORT_VR41XX_DSIU)
+ vr41xx_disable_dsiuint(DSIUINT_ALL);
+
+ free_irq(port->irq, port);
+}
+
+static void siu_set_termios(struct uart_port *port, struct ktermios *new,
+ struct ktermios *old)
+{
+ tcflag_t c_cflag, c_iflag;
+ uint8_t lcr, fcr, ier;
+ unsigned int baud, quot;
+ unsigned long flags;
+
+ c_cflag = new->c_cflag;
+ switch (c_cflag & CSIZE) {
+ case CS5:
+ lcr = UART_LCR_WLEN5;
+ break;
+ case CS6:
+ lcr = UART_LCR_WLEN6;
+ break;
+ case CS7:
+ lcr = UART_LCR_WLEN7;
+ break;
+ default:
+ lcr = UART_LCR_WLEN8;
+ break;
+ }
+
+ if (c_cflag & CSTOPB)
+ lcr |= UART_LCR_STOP;
+ if (c_cflag & PARENB)
+ lcr |= UART_LCR_PARITY;
+ if ((c_cflag & PARODD) != PARODD)
+ lcr |= UART_LCR_EPAR;
+ if (c_cflag & CMSPAR)
+ lcr |= UART_LCR_SPAR;
+
+ baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16);
+ quot = uart_get_divisor(port, baud);
+
+ fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ uart_update_timeout(port, c_cflag, baud);
+
+ c_iflag = new->c_iflag;
+
+ port->read_status_mask = UART_LSR_THRE | UART_LSR_OE | UART_LSR_DR;
+ if (c_iflag & INPCK)
+ port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+ if (c_iflag & (IGNBRK | BRKINT | PARMRK))
+ port->read_status_mask |= UART_LSR_BI;
+
+ port->ignore_status_mask = 0;
+ if (c_iflag & IGNPAR)
+ port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE;
+ if (c_iflag & IGNBRK) {
+ port->ignore_status_mask |= UART_LSR_BI;
+ if (c_iflag & IGNPAR)
+ port->ignore_status_mask |= UART_LSR_OE;
+ }
+
+ if ((c_cflag & CREAD) == 0)
+ port->ignore_status_mask |= UART_LSR_DR;
+
+ ier = siu_read(port, UART_IER);
+ ier &= ~UART_IER_MSI;
+ if (UART_ENABLE_MS(port, c_cflag))
+ ier |= UART_IER_MSI;
+ siu_write(port, UART_IER, ier);
+
+ siu_write(port, UART_LCR, lcr | UART_LCR_DLAB);
+
+ siu_write(port, UART_DLL, (uint8_t)quot);
+ siu_write(port, UART_DLM, (uint8_t)(quot >> 8));
+
+ siu_write(port, UART_LCR, lcr);
+
+ siu_write(port, UART_FCR, fcr);
+
+ siu_set_mctrl(port, port->mctrl);
+
+ spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void siu_pm(struct uart_port *port, unsigned int state, unsigned int oldstate)
+{
+ switch (state) {
+ case 0:
+ switch (port->type) {
+ case PORT_VR41XX_SIU:
+ vr41xx_supply_clock(SIU_CLOCK);
+ break;
+ case PORT_VR41XX_DSIU:
+ vr41xx_supply_clock(DSIU_CLOCK);
+ break;
+ }
+ break;
+ case 3:
+ switch (port->type) {
+ case PORT_VR41XX_SIU:
+ vr41xx_mask_clock(SIU_CLOCK);
+ break;
+ case PORT_VR41XX_DSIU:
+ vr41xx_mask_clock(DSIU_CLOCK);
+ break;
+ }
+ break;
+ }
+}
+
+static const char *siu_type(struct uart_port *port)
+{
+ return siu_type_name(port);
+}
+
+static void siu_release_port(struct uart_port *port)
+{
+ unsigned long size;
+
+ if (port->flags & UPF_IOREMAP) {
+ iounmap(port->membase);
+ port->membase = NULL;
+ }
+
+ size = siu_port_size(port);
+ release_mem_region(port->mapbase, size);
+}
+
+static int siu_request_port(struct uart_port *port)
+{
+ unsigned long size;
+ struct resource *res;
+
+ size = siu_port_size(port);
+ res = request_mem_region(port->mapbase, size, siu_type_name(port));
+ if (res == NULL)
+ return -EBUSY;
+
+ if (port->flags & UPF_IOREMAP) {
+ port->membase = ioremap(port->mapbase, size);
+ if (port->membase == NULL) {
+ release_resource(res);
+ return -ENOMEM;
+ }
+ }
+
+ return 0;
+}
+
+static void siu_config_port(struct uart_port *port, int flags)
+{
+ if (flags & UART_CONFIG_TYPE) {
+ port->type = siu_check_type(port);
+ (void)siu_request_port(port);
+ }
+}
+
+static int siu_verify_port(struct uart_port *port, struct serial_struct *serial)
+{
+ if (port->type != PORT_VR41XX_SIU && port->type != PORT_VR41XX_DSIU)
+ return -EINVAL;
+ if (port->irq != serial->irq)
+ return -EINVAL;
+ if (port->iotype != serial->io_type)
+ return -EINVAL;
+ if (port->mapbase != (unsigned long)serial->iomem_base)
+ return -EINVAL;
+
+ return 0;
+}
+
+static struct uart_ops siu_uart_ops = {
+ .tx_empty = siu_tx_empty,
+ .set_mctrl = siu_set_mctrl,
+ .get_mctrl = siu_get_mctrl,
+ .stop_tx = siu_stop_tx,
+ .start_tx = siu_start_tx,
+ .stop_rx = siu_stop_rx,
+ .enable_ms = siu_enable_ms,
+ .break_ctl = siu_break_ctl,
+ .startup = siu_startup,
+ .shutdown = siu_shutdown,
+ .set_termios = siu_set_termios,
+ .pm = siu_pm,
+ .type = siu_type,
+ .release_port = siu_release_port,
+ .request_port = siu_request_port,
+ .config_port = siu_config_port,
+ .verify_port = siu_verify_port,
+};
+
+static int siu_init_ports(struct platform_device *pdev)
+{
+ struct uart_port *port;
+ struct resource *res;
+ int *type = dev_get_platdata(&pdev->dev);
+ int i;
+
+ if (!type)
+ return 0;
+
+ port = siu_uart_ports;
+ for (i = 0; i < SIU_PORTS_MAX; i++) {
+ port->type = type[i];
+ if (port->type == PORT_UNKNOWN)
+ continue;
+ port->irq = platform_get_irq(pdev, i);
+ port->uartclk = SIU_BAUD_BASE * 16;
+ port->fifosize = 16;
+ port->regshift = 0;
+ port->iotype = UPIO_MEM;
+ port->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
+ port->line = i;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, i);
+ port->mapbase = res->start;
+ port++;
+ }
+
+ return i;
+}
+
+#ifdef CONFIG_SERIAL_VR41XX_CONSOLE
+
+#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
+
+static void wait_for_xmitr(struct uart_port *port)
+{
+ int timeout = 10000;
+ uint8_t lsr, msr;
+
+ do {
+ lsr = siu_read(port, UART_LSR);
+ if (lsr & UART_LSR_BI)
+ lsr_break_flag[port->line] = UART_LSR_BI;
+
+ if ((lsr & BOTH_EMPTY) == BOTH_EMPTY)
+ break;
+ } while (timeout-- > 0);
+
+ if (port->flags & UPF_CONS_FLOW) {
+ timeout = 1000000;
+
+ do {
+ msr = siu_read(port, UART_MSR);
+ if ((msr & UART_MSR_CTS) != 0)
+ break;
+ } while (timeout-- > 0);
+ }
+}
+
+static void siu_console_putchar(struct uart_port *port, int ch)
+{
+ wait_for_xmitr(port);
+ siu_write(port, UART_TX, ch);
+}
+
+static void siu_console_write(struct console *con, const char *s, unsigned count)
+{
+ struct uart_port *port;
+ uint8_t ier;
+
+ port = &siu_uart_ports[con->index];
+
+ ier = siu_read(port, UART_IER);
+ siu_write(port, UART_IER, 0);
+
+ uart_console_write(port, s, count, siu_console_putchar);
+
+ wait_for_xmitr(port);
+ siu_write(port, UART_IER, ier);
+}
+
+static int __init siu_console_setup(struct console *con, char *options)
+{
+ struct uart_port *port;
+ int baud = 9600;
+ int parity = 'n';
+ int bits = 8;
+ int flow = 'n';
+
+ if (con->index >= SIU_PORTS_MAX)
+ con->index = 0;
+
+ port = &siu_uart_ports[con->index];
+ if (port->membase == NULL) {
+ if (port->mapbase == 0)
+ return -ENODEV;
+ port->membase = ioremap(port->mapbase, siu_port_size(port));
+ }
+
+ if (port->type == PORT_VR41XX_SIU)
+ vr41xx_select_siu_interface(SIU_INTERFACE_RS232C);
+
+ if (options != NULL)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+ return uart_set_options(port, con, baud, parity, bits, flow);
+}
+
+static struct uart_driver siu_uart_driver;
+
+static struct console siu_console = {
+ .name = "ttyVR",
+ .write = siu_console_write,
+ .device = uart_console_device,
+ .setup = siu_console_setup,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+ .data = &siu_uart_driver,
+};
+
+static int siu_console_init(void)
+{
+ struct uart_port *port;
+ int i;
+
+ for (i = 0; i < SIU_PORTS_MAX; i++) {
+ port = &siu_uart_ports[i];
+ port->ops = &siu_uart_ops;
+ }
+
+ register_console(&siu_console);
+
+ return 0;
+}
+
+console_initcall(siu_console_init);
+
+void __init vr41xx_siu_early_setup(struct uart_port *port)
+{
+ if (port->type == PORT_UNKNOWN)
+ return;
+
+ siu_uart_ports[port->line].line = port->line;
+ siu_uart_ports[port->line].type = port->type;
+ siu_uart_ports[port->line].uartclk = SIU_BAUD_BASE * 16;
+ siu_uart_ports[port->line].mapbase = port->mapbase;
+ siu_uart_ports[port->line].ops = &siu_uart_ops;
+}
+
+#define SERIAL_VR41XX_CONSOLE &siu_console
+#else
+#define SERIAL_VR41XX_CONSOLE NULL
+#endif
+
+static struct uart_driver siu_uart_driver = {
+ .owner = THIS_MODULE,
+ .driver_name = "SIU",
+ .dev_name = "ttyVR",
+ .major = SIU_MAJOR,
+ .minor = SIU_MINOR_BASE,
+ .cons = SERIAL_VR41XX_CONSOLE,
+};
+
+static int siu_probe(struct platform_device *dev)
+{
+ struct uart_port *port;
+ int num, i, retval;
+
+ num = siu_init_ports(dev);
+ if (num <= 0)
+ return -ENODEV;
+
+ siu_uart_driver.nr = num;
+ retval = uart_register_driver(&siu_uart_driver);
+ if (retval)
+ return retval;
+
+ for (i = 0; i < num; i++) {
+ port = &siu_uart_ports[i];
+ port->ops = &siu_uart_ops;
+ port->dev = &dev->dev;
+
+ retval = uart_add_one_port(&siu_uart_driver, port);
+ if (retval < 0) {
+ port->dev = NULL;
+ break;
+ }
+ }
+
+ if (i == 0 && retval < 0) {
+ uart_unregister_driver(&siu_uart_driver);
+ return retval;
+ }
+
+ return 0;
+}
+
+static int siu_remove(struct platform_device *dev)
+{
+ struct uart_port *port;
+ int i;
+
+ for (i = 0; i < siu_uart_driver.nr; i++) {
+ port = &siu_uart_ports[i];
+ if (port->dev == &dev->dev) {
+ uart_remove_one_port(&siu_uart_driver, port);
+ port->dev = NULL;
+ }
+ }
+
+ uart_unregister_driver(&siu_uart_driver);
+
+ return 0;
+}
+
+static int siu_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct uart_port *port;
+ int i;
+
+ for (i = 0; i < siu_uart_driver.nr; i++) {
+ port = &siu_uart_ports[i];
+ if ((port->type == PORT_VR41XX_SIU ||
+ port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev)
+ uart_suspend_port(&siu_uart_driver, port);
+
+ }
+
+ return 0;
+}
+
+static int siu_resume(struct platform_device *dev)
+{
+ struct uart_port *port;
+ int i;
+
+ for (i = 0; i < siu_uart_driver.nr; i++) {
+ port = &siu_uart_ports[i];
+ if ((port->type == PORT_VR41XX_SIU ||
+ port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev)
+ uart_resume_port(&siu_uart_driver, port);
+ }
+
+ return 0;
+}
+
+static struct platform_driver siu_device_driver = {
+ .probe = siu_probe,
+ .remove = siu_remove,
+ .suspend = siu_suspend,
+ .resume = siu_resume,
+ .driver = {
+ .name = "SIU",
+ },
+};
+
+module_platform_driver(siu_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:SIU");
Code Review / kvmfornfv.git / blobdiff