aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/sibyte-2.6/patches/000-DUART.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/sibyte-2.6/patches/000-DUART.patch')
-rw-r--r--target/linux/sibyte-2.6/patches/000-DUART.patch1025
1 files changed, 0 insertions, 1025 deletions
diff --git a/target/linux/sibyte-2.6/patches/000-DUART.patch b/target/linux/sibyte-2.6/patches/000-DUART.patch
deleted file mode 100644
index 468d9dface..0000000000
--- a/target/linux/sibyte-2.6/patches/000-DUART.patch
+++ /dev/null
@@ -1,1025 +0,0 @@
-diff -Nur linux-2.6.21.1/drivers/char/Kconfig linux-2.6.21.1-owrt/drivers/char/Kconfig
---- linux-2.6.21.1/drivers/char/Kconfig 2007-04-27 23:49:26.000000000 +0200
-+++ linux-2.6.21.1-owrt/drivers/char/Kconfig 2007-05-24 22:28:54.000000000 +0200
-@@ -386,6 +386,14 @@
- If you have an Alchemy AU1000 processor (MIPS based) and you want
- to use a console on a serial port, say Y. Otherwise, say N.
-
-+config SIBYTE_SB1250_DUART
-+ bool "Support for BCM1xxx onchip DUART"
-+ depends on MIPS && SIBYTE_SB1xxx_SOC=y
-+
-+config SIBYTE_SB1250_DUART_CONSOLE
-+ bool "Console on BCM1xxx DUART"
-+ depends on SIBYTE_SB1250_DUART
-+
- config SERIAL_DEC
- bool "DECstation serial support"
- depends on MACH_DECSTATION
-diff -Nur linux-2.6.21.1/drivers/char/Makefile linux-2.6.21.1-owrt/drivers/char/Makefile
---- linux-2.6.21.1/drivers/char/Makefile 2007-04-27 23:49:26.000000000 +0200
-+++ linux-2.6.21.1-owrt/drivers/char/Makefile 2007-05-24 22:32:31.000000000 +0200
-@@ -32,6 +32,7 @@
- obj-$(CONFIG_ATARI_DSP56K) += dsp56k.o
- obj-$(CONFIG_MOXA_SMARTIO) += mxser.o
- obj-$(CONFIG_MOXA_SMARTIO_NEW) += mxser_new.o
-+obj-$(CONFIG_SIBYTE_SB1250_DUART) += sb1250_duart.o
- obj-$(CONFIG_COMPUTONE) += ip2/
- obj-$(CONFIG_RISCOM8) += riscom8.o
- obj-$(CONFIG_ISI) += isicom.o
-diff -Nur linux-2.6.21.1/drivers/char/sb1250_duart.c linux-2.6.21.1-owrt/drivers/char/sb1250_duart.c
---- linux-2.6.21.1/drivers/char/sb1250_duart.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.21.1-owrt/drivers/char/sb1250_duart.c 2007-05-24 22:10:12.000000000 +0200
-@@ -0,0 +1,979 @@
-+/*
-+ * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
-+ *
-+ * 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.
-+ */
-+
-+/*
-+ * Driver support for the on-chip sb1250 dual-channel serial port,
-+ * running in asynchronous mode. Also, support for doing a serial console
-+ * on one of those ports
-+ */
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/serial.h>
-+#include <linux/interrupt.h>
-+#include <linux/module.h>
-+#include <linux/console.h>
-+#include <linux/kdev_t.h>
-+#include <linux/major.h>
-+#include <linux/termios.h>
-+#include <linux/spinlock.h>
-+#include <linux/irq.h>
-+#include <linux/errno.h>
-+#include <linux/tty.h>
-+#include <linux/sched.h>
-+#include <linux/tty_flip.h>
-+#include <linux/timer.h>
-+#include <linux/init.h>
-+#include <linux/mm.h>
-+#include <asm/delay.h>
-+#include <asm/io.h>
-+#include <asm/uaccess.h>
-+#include <asm/sibyte/swarm.h>
-+#include <asm/sibyte/sb1250.h>
-+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
-+#include <asm/sibyte/bcm1480_regs.h>
-+#include <asm/sibyte/bcm1480_int.h>
-+#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
-+#include <asm/sibyte/sb1250_regs.h>
-+#include <asm/sibyte/sb1250_int.h>
-+#else
-+#error invalid SiByte UART configuation
-+#endif
-+#include <asm/sibyte/sb1250_uart.h>
-+#include <asm/war.h>
-+
-+#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
-+#define UNIT_CHANREG(n,reg) A_BCM1480_DUART_CHANREG((n),(reg))
-+#define UNIT_IMRREG(n) A_BCM1480_DUART_IMRREG(n)
-+#define UNIT_INT(n) (K_BCM1480_INT_UART_0 + (n))
-+#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
-+#define UNIT_CHANREG(n,reg) A_DUART_CHANREG((n),(reg))
-+#define UNIT_IMRREG(n) A_DUART_IMRREG(n)
-+#define UNIT_INT(n) (K_INT_UART_0 + (n))
-+#else
-+#error invalid SiByte UART configuation
-+#endif
-+
-+/* Toggle spewing of debugging output */
-+#undef DEBUG
-+
-+#define DEFAULT_CFLAGS (CS8 | B115200)
-+
-+#define TX_INTEN 1
-+#define DUART_INITIALIZED 2
-+
-+#define DUART_MAX_LINE 4
-+char sb1250_duart_present[DUART_MAX_LINE];
-+EXPORT_SYMBOL(sb1250_duart_present);
-+
-+/*
-+ * In bug 1956, we get glitches that can mess up uart registers. This
-+ * "read-mode-reg after any register access" is an accepted workaround.
-+ */
-+#if SIBYTE_1956_WAR
-+# define SB1_SER1956_WAR { \
-+ u32 ignore; \
-+ ignore = csr_in32(uart_states[line].mode_1); \
-+ ignore = csr_in32(uart_states[line].mode_2); \
-+ }
-+#else
-+# define SB1_SER1956_WAR
-+#endif
-+
-+/*
-+ * Still not sure what the termios structures set up here are for,
-+ * but we have to supply pointers to them to register the tty driver
-+ */
-+static struct tty_driver *sb1250_duart_driver; //, sb1250_duart_callout_driver;
-+
-+/*
-+ * This lock protects both the open flags for all the uart states as
-+ * well as the reference count for the module
-+ */
-+static DEFINE_SPINLOCK(open_lock);
-+
-+typedef struct {
-+ unsigned char outp_buf[SERIAL_XMIT_SIZE];
-+ unsigned int outp_head;
-+ unsigned int outp_tail;
-+ unsigned int outp_count;
-+ spinlock_t outp_lock;
-+ unsigned int open;
-+ unsigned int line;
-+ unsigned int last_cflags;
-+ unsigned long flags;
-+ struct tty_struct *tty;
-+
-+ /* CSR addresses */
-+ unsigned int *status;
-+ unsigned int *imr;
-+ unsigned int *tx_hold;
-+ unsigned int *rx_hold;
-+ unsigned int *mode_1;
-+ unsigned int *mode_2;
-+ unsigned int *clk_sel;
-+ unsigned int *cmd;
-+} uart_state_t;
-+
-+static uart_state_t uart_states[DUART_MAX_LINE];
-+
-+/*
-+ * Inline functions local to this module
-+ */
-+
-+static inline u32 READ_SERCSR(volatile u32 *addr, int line)
-+{
-+ u32 val = csr_in32(addr);
-+ SB1_SER1956_WAR;
-+ return val;
-+}
-+
-+static inline void WRITE_SERCSR(u32 val, volatile u32 *addr, int line)
-+{
-+ csr_out32(val, addr);
-+ SB1_SER1956_WAR;
-+}
-+
-+static void init_duart_port(uart_state_t *port, int line)
-+{
-+ if (!(port->flags & DUART_INITIALIZED)) {
-+ port->line = line;
-+ port->status = IOADDR(UNIT_CHANREG(line, R_DUART_STATUS));
-+ port->imr = IOADDR(UNIT_IMRREG(line));
-+ port->tx_hold = IOADDR(UNIT_CHANREG(line, R_DUART_TX_HOLD));
-+ port->rx_hold = IOADDR(UNIT_CHANREG(line, R_DUART_RX_HOLD));
-+ port->mode_1 = IOADDR(UNIT_CHANREG(line, R_DUART_MODE_REG_1));
-+ port->mode_2 = IOADDR(UNIT_CHANREG(line, R_DUART_MODE_REG_2));
-+ port->clk_sel = IOADDR(UNIT_CHANREG(line, R_DUART_CLK_SEL));
-+ port->cmd = IOADDR(UNIT_CHANREG(line, R_DUART_CMD));
-+ port->last_cflags = DEFAULT_CFLAGS;
-+ spin_lock_init(&port->outp_lock);
-+ port->flags |= DUART_INITIALIZED;
-+ }
-+}
-+
-+/*
-+ * Mask out the passed interrupt lines at the duart level. This should be
-+ * called while holding the associated outp_lock.
-+ */
-+static inline void duart_mask_ints(unsigned int line, unsigned int mask)
-+{
-+ uart_state_t *port = uart_states + line;
-+ u64 tmp = READ_SERCSR(port->imr, line);
-+ WRITE_SERCSR(tmp & ~mask, port->imr, line);
-+}
-+
-+
-+/* Unmask the passed interrupt lines at the duart level */
-+static inline void duart_unmask_ints(unsigned int line, unsigned int mask)
-+{
-+ uart_state_t *port = uart_states + line;
-+ u64 tmp = READ_SERCSR(port->imr, line);
-+ WRITE_SERCSR(tmp | mask, port->imr, line);
-+}
-+
-+static inline void transmit_char_pio(uart_state_t *us)
-+{
-+ struct tty_struct *tty = us->tty;
-+ int blocked = 0;
-+
-+ if (spin_trylock(&us->outp_lock)) {
-+ for (;;) {
-+ if (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_RDY))
-+ break;
-+ if (us->outp_count <= 0 || tty->stopped || tty->hw_stopped) {
-+ break;
-+ } else {
-+ WRITE_SERCSR(us->outp_buf[us->outp_head],
-+ us->tx_hold, us->line);
-+ us->outp_head = (us->outp_head + 1) & (SERIAL_XMIT_SIZE-1);
-+ if (--us->outp_count <= 0)
-+ break;
-+ }
-+ udelay(10);
-+ }
-+ spin_unlock(&us->outp_lock);
-+ } else {
-+ blocked = 1;
-+ }
-+
-+ if (!us->outp_count || tty->stopped ||
-+ tty->hw_stopped || blocked) {
-+ us->flags &= ~TX_INTEN;
-+ duart_mask_ints(us->line, M_DUART_IMR_TX);
-+ }
-+
-+ if (us->open &&
-+ (us->outp_count < (SERIAL_XMIT_SIZE/2))) {
-+ /*
-+ * We told the discipline at one point that we had no
-+ * space, so it went to sleep. Wake it up when we hit
-+ * half empty
-+ */
-+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
-+ tty->ldisc.write_wakeup)
-+ tty->ldisc.write_wakeup(tty);
-+ wake_up_interruptible(&tty->write_wait);
-+ }
-+}
-+
-+/*
-+ * Generic interrupt handler for both channels. dev_id is a pointer
-+ * to the proper uart_states structure, so from that we can derive
-+ * which port interrupted
-+ */
-+
-+static irqreturn_t duart_int(int irq, void *dev_id)
-+{
-+ uart_state_t *us = (uart_state_t *)dev_id;
-+ struct tty_struct *tty = us->tty;
-+ unsigned int status = READ_SERCSR(us->status, us->line);
-+
-+ pr_debug("DUART INT\n");
-+
-+ if (status & M_DUART_RX_RDY) {
-+ int counter = 2048;
-+ unsigned int ch;
-+
-+ if (status & M_DUART_OVRUN_ERR)
-+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-+ if (status & M_DUART_PARITY_ERR) {
-+ printk("Parity error!\n");
-+ } else if (status & M_DUART_FRM_ERR) {
-+ printk("Frame error!\n");
-+ }
-+
-+ while (counter > 0) {
-+ if (!(READ_SERCSR(us->status, us->line) & M_DUART_RX_RDY))
-+ break;
-+ ch = READ_SERCSR(us->rx_hold, us->line);
-+ tty_insert_flip_char(tty, ch, 0);
-+ udelay(1);
-+ counter--;
-+ }
-+ tty_flip_buffer_push(tty);
-+ }
-+
-+ if (status & M_DUART_TX_RDY) {
-+ transmit_char_pio(us);
-+ }
-+
-+ return IRQ_HANDLED;
-+}
-+
-+/*
-+ * Actual driver functions
-+ */
-+
-+/* Return the number of characters we can accomodate in a write at this instant */
-+static int duart_write_room(struct tty_struct *tty)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+ int retval;
-+
-+ retval = SERIAL_XMIT_SIZE - us->outp_count;
-+
-+ pr_debug("duart_write_room called, returning %i\n", retval);
-+
-+ return retval;
-+}
-+
-+/* memcpy the data from src to destination, but take extra care if the
-+ data is coming from user space */
-+static inline int copy_buf(char *dest, const char *src, int size, int from_user)
-+{
-+ if (from_user) {
-+ (void) copy_from_user(dest, src, size);
-+ } else {
-+ memcpy(dest, src, size);
-+ }
-+ return size;
-+}
-+
-+/*
-+ * Buffer up to count characters from buf to be written. If we don't have
-+ * other characters buffered, enable the tx interrupt to start sending
-+ */
-+static int duart_write(struct tty_struct *tty, const unsigned char *buf,
-+ int count)
-+{
-+ uart_state_t *us;
-+ int c, t, total = 0;
-+ unsigned long flags;
-+
-+ if (!tty) return 0;
-+
-+ us = tty->driver_data;
-+ if (!us) return 0;
-+
-+ pr_debug("duart_write called for %i chars by %i (%s)\n", count,
-+ current->pid, current->comm);
-+
-+ spin_lock_irqsave(&us->outp_lock, flags);
-+
-+ for (;;) {
-+ c = count;
-+
-+ t = SERIAL_XMIT_SIZE - us->outp_tail;
-+ if (t < c) c = t;
-+
-+ t = SERIAL_XMIT_SIZE - 1 - us->outp_count;
-+ if (t < c) c = t;
-+
-+ if (c <= 0) break;
-+
-+ memcpy(us->outp_buf + us->outp_tail, buf, c);
-+
-+ us->outp_count += c;
-+ us->outp_tail = (us->outp_tail + c) & (SERIAL_XMIT_SIZE - 1);
-+ buf += c;
-+ count -= c;
-+ total += c;
-+ }
-+
-+ spin_unlock_irqrestore(&us->outp_lock, flags);
-+
-+ if (us->outp_count && !tty->stopped &&
-+ !tty->hw_stopped && !(us->flags & TX_INTEN)) {
-+ us->flags |= TX_INTEN;
-+ duart_unmask_ints(us->line, M_DUART_IMR_TX);
-+ }
-+
-+ return total;
-+}
-+
-+
-+/* Buffer one character to be written. If there's not room for it, just drop
-+ it on the floor. This is used for echo, among other things */
-+static void duart_put_char(struct tty_struct *tty, u_char ch)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+ unsigned long flags;
-+
-+ pr_debug("duart_put_char called. Char is %x (%c)\n", (int)ch, ch);
-+
-+ spin_lock_irqsave(&us->outp_lock, flags);
-+
-+ if (us->outp_count == SERIAL_XMIT_SIZE) {
-+ spin_unlock_irqrestore(&us->outp_lock, flags);
-+ return;
-+ }
-+
-+ us->outp_buf[us->outp_tail] = ch;
-+ us->outp_tail = (us->outp_tail + 1) &(SERIAL_XMIT_SIZE-1);
-+ us->outp_count++;
-+
-+ spin_unlock_irqrestore(&us->outp_lock, flags);
-+}
-+
-+static void duart_flush_chars(struct tty_struct * tty)
-+{
-+ uart_state_t *port;
-+
-+ if (!tty)
-+ return;
-+
-+ port = tty->driver_data;
-+
-+ if (!port)
-+ return;
-+
-+ if (port->outp_count <= 0 || tty->stopped || tty->hw_stopped) {
-+ return;
-+ }
-+
-+ port->flags |= TX_INTEN;
-+ duart_unmask_ints(port->line, M_DUART_IMR_TX);
-+}
-+
-+/* Return the number of characters in the output buffer that have yet to be
-+ written */
-+static int duart_chars_in_buffer(struct tty_struct *tty)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+ int retval;
-+
-+ retval = us->outp_count;
-+
-+ pr_debug("duart_chars_in_buffer returning %i\n", retval);
-+
-+ return retval;
-+}
-+
-+/* Kill everything we haven't yet shoved into the FIFO. Turn off the
-+ transmit interrupt since we've nothing more to transmit */
-+static void duart_flush_buffer(struct tty_struct *tty)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+ unsigned long flags;
-+
-+ pr_debug("duart_flush_buffer called\n");
-+ spin_lock_irqsave(&us->outp_lock, flags);
-+ us->outp_head = us->outp_tail = us->outp_count = 0;
-+ spin_unlock_irqrestore(&us->outp_lock, flags);
-+
-+ wake_up_interruptible(&us->tty->write_wait);
-+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
-+ tty->ldisc.write_wakeup)
-+ tty->ldisc.write_wakeup(tty);
-+}
-+
-+
-+/* See sb1250 user manual for details on these registers */
-+static inline void duart_set_cflag(unsigned int line, unsigned int cflag)
-+{
-+ unsigned int mode_reg1 = 0, mode_reg2 = 0;
-+ unsigned int clk_divisor;
-+ uart_state_t *port = uart_states + line;
-+
-+ switch (cflag & CSIZE) {
-+ case CS7:
-+ mode_reg1 |= V_DUART_BITS_PER_CHAR_7;
-+
-+ default:
-+ /* We don't handle CS5 or CS6...is there a way we're supposed to
-+ * flag this? right now we just force them to CS8 */
-+ mode_reg1 |= 0x0;
-+ break;
-+ }
-+ if (cflag & CSTOPB) {
-+ mode_reg2 |= M_DUART_STOP_BIT_LEN_2;
-+ }
-+ if (!(cflag & PARENB)) {
-+ mode_reg1 |= V_DUART_PARITY_MODE_NONE;
-+ }
-+ if (cflag & PARODD) {
-+ mode_reg1 |= M_DUART_PARITY_TYPE_ODD;
-+ }
-+
-+ /* Formula for this is (5000000/baud)-1, but we saturate
-+ at 12 bits, which means we can't actually do anything less
-+ that 1200 baud */
-+ switch (cflag & CBAUD) {
-+ case B200:
-+ case B300:
-+ case B1200: clk_divisor = 4095; break;
-+ case B1800: clk_divisor = 2776; break;
-+ case B2400: clk_divisor = 2082; break;
-+ case B4800: clk_divisor = 1040; break;
-+ case B9600: clk_divisor = 519; break;
-+ case B19200: clk_divisor = 259; break;
-+ case B38400: clk_divisor = 129; break;
-+ default:
-+ case B57600: clk_divisor = 85; break;
-+ case B115200: clk_divisor = 42; break;
-+ }
-+ WRITE_SERCSR(mode_reg1, port->mode_1, port->line);
-+ WRITE_SERCSR(mode_reg2, port->mode_2, port->line);
-+ WRITE_SERCSR(clk_divisor, port->clk_sel, port->line);
-+ port->last_cflags = cflag;
-+}
-+
-+
-+/* Handle notification of a termios change. */
-+static void duart_set_termios(struct tty_struct *tty, struct termios *old)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+
-+ pr_debug("duart_set_termios called by %i (%s)\n", current->pid,
-+ current->comm);
-+ if (old && tty->termios->c_cflag == old->c_cflag)
-+ return;
-+ duart_set_cflag(us->line, tty->termios->c_cflag);
-+}
-+
-+static int get_serial_info(uart_state_t *us, struct serial_struct * retinfo)
-+{
-+ struct serial_struct tmp;
-+
-+ memset(&tmp, 0, sizeof(tmp));
-+
-+ tmp.type = PORT_SB1250;
-+ tmp.line = us->line;
-+ tmp.port = UNIT_CHANREG(tmp.line,0);
-+ tmp.irq = UNIT_INT(tmp.line);
-+ tmp.xmit_fifo_size = 16; /* fixed by hw */
-+ tmp.baud_base = 5000000;
-+ tmp.io_type = SERIAL_IO_MEM;
-+
-+ if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
-+ return -EFAULT;
-+
-+ return 0;
-+}
-+
-+static int duart_ioctl(struct tty_struct *tty, struct file * file,
-+ unsigned int cmd, unsigned long arg)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+
-+/* if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
-+ return -ENODEV;*/
-+ switch (cmd) {
-+ case TIOCMGET:
-+ printk("Ignoring TIOCMGET\n");
-+ break;
-+ case TIOCMBIS:
-+ printk("Ignoring TIOCMBIS\n");
-+ break;
-+ case TIOCMBIC:
-+ printk("Ignoring TIOCMBIC\n");
-+ break;
-+ case TIOCMSET:
-+ printk("Ignoring TIOCMSET\n");
-+ break;
-+ case TIOCGSERIAL:
-+ return get_serial_info(us,(struct serial_struct *) arg);
-+ case TIOCSSERIAL:
-+ printk("Ignoring TIOCSSERIAL\n");
-+ break;
-+ case TIOCSERCONFIG:
-+ printk("Ignoring TIOCSERCONFIG\n");
-+ break;
-+ case TIOCSERGETLSR: /* Get line status register */
-+ printk("Ignoring TIOCSERGETLSR\n");
-+ break;
-+ case TIOCSERGSTRUCT:
-+ printk("Ignoring TIOCSERGSTRUCT\n");
-+ break;
-+ case TIOCMIWAIT:
-+ printk("Ignoring TIOCMIWAIT\n");
-+ break;
-+ case TIOCGICOUNT:
-+ printk("Ignoring TIOCGICOUNT\n");
-+ break;
-+ case TIOCSERGWILD:
-+ printk("Ignoring TIOCSERGWILD\n");
-+ break;
-+ case TIOCSERSWILD:
-+ printk("Ignoring TIOCSERSWILD\n");
-+ break;
-+ default:
-+ break;
-+ }
-+// printk("Ignoring IOCTL %x from pid %i (%s)\n", cmd, current->pid, current->comm);
-+ return -ENOIOCTLCMD;
-+}
-+
-+/* XXXKW locking? */
-+static void duart_start(struct tty_struct *tty)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+
-+ pr_debug("duart_start called\n");
-+
-+ if (us->outp_count && !(us->flags & TX_INTEN)) {
-+ us->flags |= TX_INTEN;
-+ duart_unmask_ints(us->line, M_DUART_IMR_TX);
-+ }
-+}
-+
-+/* XXXKW locking? */
-+static void duart_stop(struct tty_struct *tty)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+
-+ pr_debug("duart_stop called\n");
-+
-+ if (us->outp_count && (us->flags & TX_INTEN)) {
-+ us->flags &= ~TX_INTEN;
-+ duart_mask_ints(us->line, M_DUART_IMR_TX);
-+ }
-+}
-+
-+/* Not sure on the semantics of this; are we supposed to wait until the stuff
-+ * already in the hardware FIFO drains, or are we supposed to wait until
-+ * we've drained the output buffer, too? I'm assuming the former, 'cause thats
-+ * what the other drivers seem to assume
-+ */
-+
-+static void duart_wait_until_sent(struct tty_struct *tty, int timeout)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+ unsigned long orig_jiffies;
-+
-+ orig_jiffies = jiffies;
-+ pr_debug("duart_wait_until_sent(%d)+\n", timeout);
-+ while (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_EMT)) {
-+ set_current_state(TASK_INTERRUPTIBLE);
-+ schedule_timeout(1);
-+ if (signal_pending(current))
-+ break;
-+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
-+ break;
-+ }
-+ pr_debug("duart_wait_until_sent()-\n");
-+}
-+
-+/*
-+ * duart_hangup() --- called by tty_hangup() when a hangup is signaled.
-+ */
-+static void duart_hangup(struct tty_struct *tty)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+
-+ duart_flush_buffer(tty);
-+ us->open = 0;
-+ us->tty = 0;
-+}
-+
-+/*
-+ * Open a tty line. Note that this can be called multiple times, so ->open can
-+ * be >1. Only set up the tty struct if this is a "new" open, e.g. ->open was
-+ * zero
-+ */
-+static int duart_open(struct tty_struct *tty, struct file *filp)
-+{
-+ uart_state_t *us;
-+ unsigned int line = tty->index;
-+ unsigned long flags;
-+
-+ if ((line >= tty->driver->num) || !sb1250_duart_present[line])
-+ return -ENODEV;
-+
-+ pr_debug("duart_open called by %i (%s), tty is %p, rw is %p, ww is %p\n",
-+ current->pid, current->comm, tty, (void *)&tty->read_wait,
-+ (void *)&tty->write_wait);
-+
-+ us = uart_states + line;
-+ tty->driver_data = us;
-+
-+ spin_lock_irqsave(&open_lock, flags);
-+ if (!us->open) {
-+ us->tty = tty;
-+ us->tty->termios->c_cflag = us->last_cflags;
-+ }
-+ us->open++;
-+ us->flags &= ~TX_INTEN;
-+ duart_unmask_ints(line, M_DUART_IMR_RX);
-+ spin_unlock_irqrestore(&open_lock, flags);
-+
-+ return 0;
-+}
-+
-+
-+/*
-+ * Close a reference count out. If reference count hits zero, null the
-+ * tty, kill the interrupts. The tty_io driver is responsible for making
-+ * sure we've cleared out our internal buffers before calling close()
-+ */
-+static void duart_close(struct tty_struct *tty, struct file *filp)
-+{
-+ uart_state_t *us = (uart_state_t *) tty->driver_data;
-+ unsigned long flags;
-+
-+ pr_debug("duart_close called by %i (%s)\n", current->pid, current->comm);
-+
-+ if (!us || !us->open)
-+ return;
-+
-+ spin_lock_irqsave(&open_lock, flags);
-+ if (tty_hung_up_p(filp)) {
-+ spin_unlock_irqrestore(&open_lock, flags);
-+ return;
-+ }
-+
-+ if (--us->open < 0) {
-+ us->open = 0;
-+ printk(KERN_ERR "duart: bad open count: %d\n", us->open);
-+ }
-+ if (us->open) {
-+ spin_unlock_irqrestore(&open_lock, flags);
-+ return;
-+ }
-+
-+ spin_unlock_irqrestore(&open_lock, flags);
-+
-+ tty->closing = 1;
-+
-+ /* Stop accepting input */
-+ duart_mask_ints(us->line, M_DUART_IMR_RX);
-+ /* Wait for FIFO to drain */
-+ while (!(READ_SERCSR(us->status, us->line) & M_DUART_TX_EMT))
-+ ;
-+
-+ if (tty->driver->flush_buffer)
-+ tty->driver->flush_buffer(tty);
-+ if (tty->ldisc.flush_buffer)
-+ tty->ldisc.flush_buffer(tty);
-+ tty->closing = 0;
-+}
-+
-+
-+static struct tty_operations duart_ops = {
-+ .open = duart_open,
-+ .close = duart_close,
-+ .write = duart_write,
-+ .put_char = duart_put_char,
-+ .flush_chars = duart_flush_chars,
-+ .write_room = duart_write_room,
-+ .chars_in_buffer = duart_chars_in_buffer,
-+ .flush_buffer = duart_flush_buffer,
-+ .ioctl = duart_ioctl,
-+// .throttle = duart_throttle,
-+// .unthrottle = duart_unthrottle,
-+ .set_termios = duart_set_termios,
-+ .stop = duart_stop,
-+ .start = duart_start,
-+ .hangup = duart_hangup,
-+ .wait_until_sent = duart_wait_until_sent,
-+};
-+
-+/* Initialize the sb1250_duart_present array based on SOC type. */
-+static void __init sb1250_duart_init_present_lines(void)
-+{
-+ int i, max_lines;
-+
-+ /* Set the number of available units based on the SOC type. */
-+ switch (soc_type) {
-+ case K_SYS_SOC_TYPE_BCM1x55:
-+ case K_SYS_SOC_TYPE_BCM1x80:
-+ max_lines = 4;
-+ break;
-+ default:
-+ /* Assume at least two serial ports at the normal address. */
-+ max_lines = 2;
-+ break;
-+ }
-+ if (max_lines > DUART_MAX_LINE)
-+ max_lines = DUART_MAX_LINE;
-+
-+ for (i = 0; i < max_lines; i++)
-+ sb1250_duart_present[i] = 1;
-+}
-+
-+/* Set up the driver and register it, register the UART interrupts. This
-+ is called from tty_init, or as a part of the module init */
-+static int __init sb1250_duart_init(void)
-+{
-+ int i;
-+
-+ sb1250_duart_init_present_lines();
-+
-+ sb1250_duart_driver = alloc_tty_driver(DUART_MAX_LINE);
-+ if (!sb1250_duart_driver)
-+ return -ENOMEM;
-+
-+ sb1250_duart_driver->owner = THIS_MODULE;
-+ sb1250_duart_driver->name = "duart";
-+ sb1250_duart_driver->major = TTY_MAJOR;
-+ sb1250_duart_driver->minor_start = SB1250_DUART_MINOR_BASE;
-+ sb1250_duart_driver->type = TTY_DRIVER_TYPE_SERIAL;
-+ sb1250_duart_driver->subtype = SERIAL_TYPE_NORMAL;
-+ sb1250_duart_driver->init_termios = tty_std_termios;
-+ sb1250_duart_driver->flags = TTY_DRIVER_REAL_RAW;
-+ tty_set_operations(sb1250_duart_driver, &duart_ops);
-+
-+ for (i = 0; i < DUART_MAX_LINE; i++) {
-+ uart_state_t *port = uart_states + i;
-+
-+ if (!sb1250_duart_present[i])
-+ continue;
-+
-+ init_duart_port(port, i);
-+ duart_mask_ints(i, M_DUART_IMR_ALL);
-+ if (request_irq(UNIT_INT(i), duart_int, 0, "uart", port)) {
-+ panic("Couldn't get uart0 interrupt line");
-+ }
-+ /*
-+ * this generic write to a register does not implement the 1956
-+ * WAR and sometimes output gets corrupted afterwards,
-+ * especially if the port was in use as a console.
-+ */
-+ __raw_writel(M_DUART_RX_EN|M_DUART_TX_EN, port->cmd);
-+
-+ /*
-+ * we should really check to see if it's registered as a console
-+ * before trashing those settings
-+ */
-+ duart_set_cflag(i, port->last_cflags);
-+ }
-+
-+ /* Interrupts are now active, our ISR can be called. */
-+
-+ if (tty_register_driver(sb1250_duart_driver)) {
-+ printk(KERN_ERR "Couldn't register sb1250 duart serial driver\n");
-+ put_tty_driver(sb1250_duart_driver);
-+ return 1;
-+ }
-+ return 0;
-+}
-+
-+/* Unload the driver. Unregister stuff, get ready to go away */
-+static void __exit sb1250_duart_fini(void)
-+{
-+ unsigned long flags;
-+ int i;
-+
-+ local_irq_save(flags);
-+ tty_unregister_driver(sb1250_duart_driver);
-+ put_tty_driver(sb1250_duart_driver);
-+
-+ for (i = 0; i < DUART_MAX_LINE; i++) {
-+ if (!sb1250_duart_present[i])
-+ continue;
-+ free_irq(UNIT_INT(i), &uart_states[i]);
-+ disable_irq(UNIT_INT(i));
-+ }
-+ local_irq_restore(flags);
-+}
-+
-+module_init(sb1250_duart_init);
-+module_exit(sb1250_duart_fini);
-+MODULE_DESCRIPTION("SB1250 Duart serial driver");
-+MODULE_AUTHOR("Broadcom Corp.");
-+
-+#ifdef CONFIG_SIBYTE_SB1250_DUART_CONSOLE
-+
-+/*
-+ * Serial console stuff. Very basic, polling driver for doing serial
-+ * console output. The console_sem is held by the caller, so we
-+ * shouldn't be interrupted for more console activity.
-+ * XXXKW What about getting interrupted by uart driver activity?
-+ */
-+
-+void serial_outc(unsigned char c, int line)
-+{
-+ uart_state_t *port = uart_states + line;
-+ while (!(READ_SERCSR(port->status, line) & M_DUART_TX_RDY)) ;
-+ WRITE_SERCSR(c, port->tx_hold, line);
-+ while (!(READ_SERCSR(port->status, port->line) & M_DUART_TX_EMT)) ;
-+}
-+
-+static void ser_console_write(struct console *cons, const char *s,
-+ unsigned int count)
-+{
-+ int line = cons->index;
-+ uart_state_t *port = uart_states + line;
-+ u32 imr;
-+
-+ imr = READ_SERCSR(port->imr, line);
-+ WRITE_SERCSR(0, port->imr, line);
-+ while (count--) {
-+ if (*s == '\n')
-+ serial_outc('\r', line);
-+ serial_outc(*s++, line);
-+ }
-+ WRITE_SERCSR(imr, port->imr, line);
-+}
-+
-+static struct tty_driver *ser_console_device(struct console *c, int *index)
-+{
-+ *index = c->index;
-+ return sb1250_duart_driver;
-+}
-+
-+static int ser_console_setup(struct console *cons, char *str)
-+{
-+ int i;
-+
-+ sb1250_duart_init_present_lines();
-+
-+ for (i = 0; i < DUART_MAX_LINE; i++) {
-+ uart_state_t *port = uart_states + i;
-+ u32 cflags = DEFAULT_CFLAGS;
-+
-+ if (!sb1250_duart_present[i])
-+ continue;
-+
-+ init_duart_port(port, i);
-+ if (str) {
-+ int speed;
-+ char par = 'n';
-+ int cbits = 8;
-+
-+ cflags = 0;
-+
-+ /*
-+ * format is in Documentation/serial_console.txt
-+ */
-+ sscanf(str, "%d%c%d", &speed, &par, &cbits);
-+
-+ switch (speed) {
-+ case 200:
-+ case 300:
-+ case 1200:
-+ cflags |= B1200;
-+ break;
-+ case 1800:
-+ cflags |= B1800;
-+ break;
-+ case 2400:
-+ cflags |= B2400;
-+ break;
-+ case 4800:
-+ cflags |= B4800;
-+ break;
-+ default:
-+ case 9600:
-+ cflags |= B9600;
-+ break;
-+ case 19200:
-+ cflags |= B19200;
-+ break;
-+ case 38400:
-+ cflags |= B38400;
-+ break;
-+ case 57600:
-+ cflags |= B57600;
-+ break;
-+ case 115200:
-+ cflags |= B115200;
-+ break;
-+ }
-+ switch (par) {
-+ case 'o':
-+ cflags |= PARODD;
-+ case 'e':
-+ cflags |= PARENB;
-+ }
-+ switch (cbits) {
-+ default: // we only do 7 or 8
-+ case 8:
-+ cflags |= CS8;
-+ break;
-+ case 7:
-+ cflags |= CS7;
-+ break;
-+ }
-+ }
-+ duart_set_cflag(i, cflags);
-+ WRITE_SERCSR(M_DUART_RX_EN | M_DUART_TX_EN, port->cmd, i);
-+ }
-+
-+ return 0;
-+}
-+
-+static struct console sb1250_ser_cons = {
-+ .name = "duart",
-+ .write = ser_console_write,
-+ .device = ser_console_device,
-+ .setup = ser_console_setup,
-+ .flags = CON_PRINTBUFFER,
-+ .index = -1,
-+};
-+
-+static int __init sb1250_serial_console_init(void)
-+{
-+ //add_preferred_console("duart", 0, "57600n8");
-+ register_console(&sb1250_ser_cons);
-+ return 0;
-+}
-+
-+console_initcall(sb1250_serial_console_init);
-+
-+#endif /* CONFIG_SIBYTE_SB1250_DUART_CONSOLE */
-diff -Nur linux-2.6.21.1/include/linux/serial.h linux-2.6.21.1-owrt/include/linux/serial.h
---- linux-2.6.21.1/include/linux/serial.h 2007-04-27 23:49:26.000000000 +0200
-+++ linux-2.6.21.1-owrt/include/linux/serial.h 2007-05-24 22:10:29.000000000 +0200
-@@ -76,7 +76,8 @@
- #define PORT_16654 11
- #define PORT_16850 12
- #define PORT_RSA 13 /* RSA-DV II/S card */
--#define PORT_MAX 13
-+#define PORT_SB1250 14
-+#define PORT_MAX 14
-
- #define SERIAL_IO_PORT 0
- #define SERIAL_IO_HUB6 1
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 16:45:49 +0000