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List: linux-kernel
Subject: [PATCH 2.6.11-rc2-mm2] serial: add NEC VR4100 series serial support
From: Yoichi Yuasa <yuasa () hh ! iij4u ! or ! jp>
Date: 2005-01-31 23:56:55
Message-ID: 20050201085655.0e7d6f9a.yuasa () hh ! iij4u ! or ! jp
[Download RAW message or body]
This patch adds serial driver for NEC VR4100 series serial interface unit.
Yoichi
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
diff -urN -X dontdiff a-orig/Documentation/devices.txt a/Documentation/devices.txt
--- a-orig/Documentation/devices.txt Mon Jan 31 00:42:18 2005
+++ a/Documentation/devices.txt Tue Feb 1 08:23:40 2005
@@ -2755,6 +2755,8 @@
50 = /dev/ttyIOC40 Altix serial card
...
81 = /dev/ttyIOC431 Altix serial card
+ 82 = /dev/ttyVR0 NEC VR4100 series SIU
+ 83 = /dev/ttyVR1 NEC VR4100 series DSIU
205 char Low-density serial ports (alternate device)
0 = /dev/culu0 Callout device for ttyLU0
@@ -2789,6 +2791,8 @@
50 = /dev/cuioc40 Callout device for ttyIOC40
...
81 = /dev/cuioc431 Callout device for ttyIOC431
+ 82 = /dev/cuvr0 Callout device for ttyVR0
+ 83 = /dev/cuvr1 Callout device for ttyVR1
206 char OnStream SC-x0 tape devices
diff -urN -X dontdiff a-orig/arch/mips/vr41xx/common/cmu.c a/arch/mips/vr41xx/common/cmu.c
--- a-orig/arch/mips/vr41xx/common/cmu.c Sat Jan 22 10:47:33 2005
+++ a/arch/mips/vr41xx/common/cmu.c Tue Feb 1 08:18:31 2005
@@ -160,7 +160,7 @@
current_cpu_data.cputype == CPU_VR4121) {
cmuclkmsk &= ~MSKDSIU;
} else {
- if (cmuclkmsk & MSKSIU)
+ if (cmuclkmsk & MSKSSIU)
cmuclkmsk &= ~MSKDSIU;
else
cmuclkmsk &= ~(MSKSIU | MSKDSIU);
diff -urN -X dontdiff a-orig/drivers/serial/Kconfig a/drivers/serial/Kconfig
--- a-orig/drivers/serial/Kconfig Mon Jan 31 00:42:34 2005
+++ a/drivers/serial/Kconfig Tue Feb 1 08:18:31 2005
@@ -806,4 +806,21 @@
bool "TX39XX/49XX SIO act as standard serial"
depends on !SERIAL_8250 && SERIAL_TXX9
+config SERIAL_VR41XX
+ tristate "NEC VR4100 series Serial Interface Unit support"
+ depends on CPU_VR41XX
+ select SERIAL_CORE
+ help
+ If you have a NEC VR4100 series processor and you want to use
+ Serial Interface Unit(SIU) or Debug Serial Interface Unit(DSIU)
+ (not include VR4111/VR4121 DSIU), say Y. Otherwise, say N.
+
+config SERIAL_VR41XX_CONSOLE
+ bool "Enable NEC VR4100 series Serial Interface Unit console"
+ depends on SERIAL_VR41XX
+ select SERIAL_CORE_CONSOLE
+ help
+ If you have a NEC VR4100 series processor and you want to use
+ a console on a serial port, say Y. Otherwise, say N.
+
endmenu
diff -urN -X dontdiff a-orig/drivers/serial/Makefile a/drivers/serial/Makefile
--- a-orig/drivers/serial/Makefile Sat Jan 22 10:48:01 2005
+++ a/drivers/serial/Makefile Tue Feb 1 08:19:46 2005
@@ -48,3 +48,4 @@
obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o
obj-$(CONFIG_SERIAL_MPSC) += mpsc.o
obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o
+obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
diff -urN -X dontdiff a-orig/drivers/serial/vr41xx_siu.c a/drivers/serial/vr41xx_siu.c
--- a-orig/drivers/serial/vr41xx_siu.c Thu Jan 1 09:00:00 1970
+++ a/drivers/serial/vr41xx_siu.c Tue Feb 1 08:24:03 2005
@@ -0,0 +1,1009 @@
+/*
+ * Driver for NEC VR4100 series Serial Interface Unit.
+ *
+ * Copyright (C) 2004-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
+ *
+ * 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
+ */
+#include <linux/config.h>
+
+#if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/console.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform.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/vr41xx.h>
+
+#define SIU_PORTS_MAX 2
+#define SIU_BAUD_BASE 1152000
+#define SIU_MAJOR 204
+#define SIU_MINOR_BASE 82
+
+#define RX_MAX_COUNT 256
+#define TX_MAX_COUNT 15
+
+struct siu_port {
+ unsigned int type;
+ unsigned int irq;
+ unsigned long start;
+ uint8_t flags;
+};
+
+#define SIU_HAS_IRDA_SUPPORT 0x01
+#define SIU_OUTPUT_IRDA 0x10
+
+static const struct siu_port siu_type1_ports[] = {
+ { .type = PORT_VR41XX_SIU,
+ .irq = SIU_IRQ,
+ .start = 0x0c000000UL,
+ .flags = SIU_HAS_IRDA_SUPPORT, },
+};
+
+#define SIU_TYPE1_NR_PORTS (sizeof(siu_type1_ports) / sizeof(struct siu_port))
+
+static const struct siu_port siu_type2_ports[] = {
+ { .type = PORT_VR41XX_SIU,
+ .irq = SIU_IRQ,
+ .start = 0x0f000800UL,
+ .flags = SIU_HAS_IRDA_SUPPORT, },
+ { .type = PORT_VR41XX_DSIU,
+ .irq = DSIU_IRQ,
+ .start = 0x0f000820UL, },
+};
+
+#define SIU_TYPE2_NR_PORTS (sizeof(siu_type2_ports) / sizeof(struct siu_port))
+
+static struct uart_port siu_uart_ports[SIU_PORTS_MAX];
+static uint8_t lsr_break_flag[SIU_PORTS_MAX];
+
+#define siu_read(port, offset) readb((port)->membase + (offset))
+#define siu_write(port, offset, value) writeb((value), (port)->membase + (offset))
+
+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 int siu_probe_ports(void)
+{
+ switch (current_cpu_data.cputype) {
+ case CPU_VR4111:
+ case CPU_VR4121:
+ return SIU_TYPE1_NR_PORTS;
+ case CPU_VR4122:
+ case CPU_VR4131:
+ case CPU_VR4133:
+ return SIU_TYPE2_NR_PORTS;
+ }
+
+ return 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)
+{
+ switch (current_cpu_data.cputype) {
+ case CPU_VR4111:
+ case CPU_VR4121:
+ if (port->line == 0)
+ return PORT_VR41XX_SIU;
+ break;
+ case CPU_VR4122:
+ case CPU_VR4131:
+ case CPU_VR4133:
+ if (port->line == 0)
+ return PORT_VR41XX_SIU;
+ else if (port->line == 1)
+ return PORT_VR41XX_DSIU;
+ break;
+ }
+
+ 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 "unknown";
+}
+
+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 int tty_stop)
+{
+ 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 int tty_start)
+{
+ 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,
+ struct pt_regs *regs)
+{
+ struct tty_struct *tty;
+ uint8_t lsr, ch;
+ char flag;
+ int max_count = RX_MAX_COUNT;
+
+ tty = port->info->tty;
+ lsr = *status;
+
+ do {
+ if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
+ if (tty->low_latency)
+ tty_flip_buffer_push(tty);
+ }
+
+ 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, regs))
+ goto ignore_char;
+ if ((lsr & port->ignore_status_mask) == 0)
+ tty_insert_flip_char(tty, ch, flag);
+ if ((lsr & UART_LSR_OE) && (tty->flip.count < TTY_FLIPBUF_SIZE))
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+
+ ignore_char:
+ lsr = siu_read(port, UART_LSR);
+ } while ((lsr & UART_LSR_DR) && (max_count-- > 0));
+
+ tty_flip_buffer_push(tty);
+
+ *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->info->delta_msr_wait);
+}
+
+static inline void transmit_chars(struct uart_port *port)
+{
+ struct circ_buf *xmit;
+ int max_count = TX_MAX_COUNT;
+
+ xmit = &port->info->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, 0);
+ 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, 0);
+}
+
+static irqreturn_t siu_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct uart_port *port;
+ uint8_t iir, lsr;
+
+ if (dev_id == NULL)
+ return IRQ_NONE;
+
+ 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, regs);
+
+ 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;
+
+ 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;
+
+ if (port->membase == NULL)
+ return;
+
+ 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 termios *new,
+ struct termios *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 & (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;
+
+ size = siu_port_size(port);
+ if (request_mem_region(port->mapbase, size, siu_type_name(port)) == NULL)
+ return -EBUSY;
+
+ if (port->flags & UPF_IOREMAP) {
+ port->membase = ioremap(port->mapbase, size);
+ if (port->membase == NULL) {
+ release_mem_region(port->mapbase, size);
+ 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;
+
+ 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(void)
+{
+ const struct siu_port *siu;
+ struct uart_port *port;
+ int i, num;
+
+ switch (current_cpu_data.cputype) {
+ case CPU_VR4111:
+ case CPU_VR4121:
+ siu = siu_type1_ports;
+ break;
+ case CPU_VR4122:
+ case CPU_VR4131:
+ case CPU_VR4133:
+ siu = siu_type2_ports;
+ break;
+ default:
+ return 0;
+ }
+
+ port = siu_uart_ports;
+ num = siu_probe_ports();
+ for (i = 0; i < num; i++) {
+ spin_lock_init(&port->lock);
+ port->irq = siu->irq;
+ port->uartclk = SIU_BAUD_BASE * 16;
+ port->fifosize = 16;
+ port->regshift = 0;
+ port->iotype = UPIO_MEM;
+ port->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
+ port->type = siu->type;
+ port->line = i;
+ port->mapbase = siu->start;
+ siu++;
+ port++;
+ }
+
+ return num;
+}
+
+#ifdef CONFIG_SERIAL_VR41XX_CONSOLE
+
+static void early_set_termios(struct uart_port *port, struct termios *new,
+ struct termios *old)
+{
+ tcflag_t c_cflag;
+ uint8_t lcr;
+ unsigned int baud, quot;
+
+ 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);
+
+ 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);
+}
+
+static struct uart_ops early_uart_ops = {
+ .set_termios = early_set_termios,
+};
+
+#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_write(struct console *con, const char *s, unsigned count)
+{
+ struct uart_port *port;
+ uint8_t ier;
+ unsigned i;
+
+ port = &siu_uart_ports[con->index];
+
+ ier = siu_read(port, UART_IER);
+ siu_write(port, UART_IER, 0);
+
+ for (i = 0; i < count && *s != '\0'; i++, s++) {
+ wait_for_xmitr(port);
+ siu_write(port, UART_TX, *s);
+ if (*s == '\n') {
+ wait_for_xmitr(port);
+ siu_write(port, UART_TX, '\r');
+ }
+ }
+
+ wait_for_xmitr(port);
+ siu_write(port, UART_IER, ier);
+}
+
+static int 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 = (unsigned char __iomem *)KSEG1ADDR(port->mapbase);
+ }
+
+ 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 __devinit siu_console_init(void)
+{
+ struct uart_port *port;
+ int num, i;
+
+ num = siu_init_ports();
+ if (num <= 0)
+ return -ENODEV;
+
+ for (i = 0; i < num; i++) {
+ port = &siu_uart_ports[i];
+ port->ops = &early_uart_ops;
+ }
+
+ register_console(&siu_console);
+
+ return 0;
+}
+
+console_initcall(siu_console_init);
+
+#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",
+ .devfs_name = "ttvr/",
+ .major = SIU_MAJOR,
+ .minor = SIU_MINOR_BASE,
+ .cons = SERIAL_VR41XX_CONSOLE,
+};
+
+static int siu_probe(struct device *dev)
+{
+ struct uart_port *port;
+ int num, i, retval;
+
+ num = siu_init_ports();
+ 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;
+
+ retval = uart_add_one_port(&siu_uart_driver, port);
+ if (retval)
+ break;
+ }
+
+ if (i == 0 && retval < 0) {
+ uart_unregister_driver(&siu_uart_driver);
+ return retval;
+ }
+
+ return 0;
+}
+
+static int siu_remove(struct 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) {
+ uart_remove_one_port(&siu_uart_driver, port);
+ port->dev = NULL;
+ }
+ }
+
+ uart_unregister_driver(&siu_uart_driver);
+
+ return 0;
+}
+
+static int siu_suspend(struct device *dev, u32 state, u32 level)
+{
+ struct uart_port *port;
+ int i;
+
+ if (level != SUSPEND_DISABLE)
+ return 0;
+
+ 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)
+ uart_suspend_port(&siu_uart_driver, port);
+
+ }
+
+ return 0;
+}
+
+static int siu_resume(struct device *dev, u32 level)
+{
+ struct uart_port *port;
+ int i;
+
+ if (level != RESUME_ENABLE)
+ return 0;
+
+ 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)
+ uart_resume_port(&siu_uart_driver, port);
+ }
+
+ return 0;
+}
+
+static struct platform_device *siu_platform_device;
+
+static struct device_driver siu_device_driver = {
+ .name = "SIU",
+ .bus = &platform_bus_type,
+ .probe = siu_probe,
+ .remove = siu_remove,
+ .suspend = siu_suspend,
+ .resume = siu_resume,
+};
+
+static int __devinit vr41xx_siu_init(void)
+{
+ int retval;
+
+ siu_platform_device = platform_device_register_simple("SIU", -1, NULL, 0);
+ if (IS_ERR(siu_platform_device))
+ return PTR_ERR(siu_platform_device);
+
+ retval = driver_register(&siu_device_driver);
+ if (retval < 0) {
+ platform_device_unregister(siu_platform_device);
+ }
+
+ return retval;
+}
+
+static void __devexit vr41xx_siu_exit(void)
+{
+ driver_unregister(&siu_device_driver);
+
+ platform_device_unregister(siu_platform_device);
+}
+
+module_init(vr41xx_siu_init);
+module_exit(vr41xx_siu_exit);
diff -urN -X dontdiff a-orig/include/asm-mips/vr41xx/vr41xx.h a/include/asm-mips/vr41xx/vr41xx.h
--- a-orig/include/asm-mips/vr41xx/vr41xx.h Sat Jan 22 10:47:31 2005
+++ a/include/asm-mips/vr41xx/vr41xx.h Tue Feb 1 08:18:31 2005
@@ -249,8 +249,6 @@
/*
* Serial Interface Unit
*/
-extern void vr41xx_siu_init(void);
-extern int vr41xx_serial_ports;
/* SIU interfaces */
typedef enum {
diff -urN -X dontdiff a-orig/include/linux/serial_core.h a/include/linux/serial_core.h
--- a-orig/include/linux/serial_core.h Mon Jan 31 00:42:48 2005
+++ a/include/linux/serial_core.h Tue Feb 1 08:20:42 2005
@@ -106,6 +106,10 @@
/* TXX9 type number */
#define PORT_TXX9 64
+/* NEC VR4100 series SIU/DSIU */
+#define PORT_VR41XX_SIU 65
+#define PORT_VR41XX_DSIU 66
+
#ifdef __KERNEL__
#include <linux/config.h>
-
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