+++ /dev/null
-/*
- * UART driver for 68360 CPM SCC or SMC
- * Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>,
- * Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca>
- * Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
- *
- * I used the serial.c driver as the framework for this driver.
- * Give credit to those guys.
- * The original code was written for the MBX860 board. I tried to make
- * it generic, but there may be some assumptions in the structures that
- * have to be fixed later.
- * To save porting time, I did not bother to change any object names
- * that are not accessed outside of this file.
- * It still needs lots of work........When it was easy, I included code
- * to support the SCCs, but this has never been tested, nor is it complete.
- * Only the SCCs support modem control, so that is not complete either.
- *
- * This module exports the following rs232 io functions:
- *
- * int rs_360_init(void);
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <asm/irq.h>
-#include <asm/m68360.h>
-#include <asm/commproc.h>
-
-
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-extern int kgdb_output_string (const char* s, unsigned int count);
-#endif
-
-
-/* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */
-#include <linux/console.h>
-#include <linux/jiffies.h>
-
-/* this defines the index into rs_table for the port to use
- */
-#ifndef CONFIG_SERIAL_CONSOLE_PORT
-#define CONFIG_SERIAL_CONSOLE_PORT 1 /* ie SMC2 - note USE_SMC2 must be defined */
-#endif
-/* #endif */
-
-#if 0
-/* SCC2 for console
- */
-#undef CONFIG_SERIAL_CONSOLE_PORT
-#define CONFIG_SERIAL_CONSOLE_PORT 2
-#endif
-
-
-#define TX_WAKEUP ASYNC_SHARE_IRQ
-
-static char *serial_name = "CPM UART driver";
-static char *serial_version = "0.03";
-
-static struct tty_driver *serial_driver;
-int serial_console_setup(struct console *co, char *options);
-
-/*
- * Serial driver configuration section. Here are the various options:
- */
-#define SERIAL_PARANOIA_CHECK
-#define CONFIG_SERIAL_NOPAUSE_IO
-#define SERIAL_DO_RESTART
-
-/* Set of debugging defines */
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-
-#define _INLINE_ inline
-
-#define DBG_CNT(s)
-
-/* We overload some of the items in the data structure to meet our
- * needs. For example, the port address is the CPM parameter ram
- * offset for the SCC or SMC. The maximum number of ports is 4 SCCs and
- * 2 SMCs. The "hub6" field is used to indicate the channel number, with
- * a flag indicating SCC or SMC, and the number is used as an index into
- * the CPM parameter area for this device.
- * The "type" field is currently set to 0, for PORT_UNKNOWN. It is
- * not currently used. I should probably use it to indicate the port
- * type of SMC or SCC.
- * The SMCs do not support any modem control signals.
- */
-#define smc_scc_num hub6
-#define NUM_IS_SCC ((int)0x00010000)
-#define PORT_NUM(P) ((P) & 0x0000ffff)
-
-
-#if defined (CONFIG_UCQUICC)
-
-volatile extern void *_periph_base;
-/* sipex transceiver
- * mode bits for are on pins
- *
- * SCC2 d16..19
- * SCC3 d20..23
- * SCC4 d24..27
- */
-#define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1)))
-
-static uint sipex_mode_bits = 0x00000000;
-
-#endif
-
-/* There is no `serial_state' defined back here in 2.0.
- * Try to get by with serial_struct
- */
-/* #define serial_state serial_struct */
-
-/* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few
- * extras: */
-
-#if 0
-struct async_icount_24 {
- __u32 cts, dsr, rng, dcd, tx, rx;
- __u32 frame, parity, overrun, brk;
- __u32 buf_overrun;
-} icount;
-#endif
-
-#if 0
-
-struct serial_state {
- int magic;
- int baud_base;
- unsigned long port;
- int irq;
- int flags;
- int hub6;
- int type;
- int line;
- int revision; /* Chip revision (950) */
- int xmit_fifo_size;
- int custom_divisor;
- int count;
- u8 *iomem_base;
- u16 iomem_reg_shift;
- unsigned short close_delay;
- unsigned short closing_wait; /* time to wait before closing */
- struct async_icount_24 icount;
- int io_type;
- struct async_struct *info;
-};
-#endif
-
-#define SSTATE_MAGIC 0x5302
-
-
-
-/* SMC2 is sometimes used for low performance TDM interfaces. Define
- * this as 1 if you want SMC2 as a serial port UART managed by this driver.
- * Define this as 0 if you wish to use SMC2 for something else.
- */
-#define USE_SMC2 1
-
-#if 0
-/* Define SCC to ttySx mapping. */
-#define SCC_NUM_BASE (USE_SMC2 + 1) /* SCC base tty "number" */
-
-/* Define which SCC is the first one to use for a serial port. These
- * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
- * for Ethernet, and the first available SCC for serial UART is SCC2.
- * NOTE: IF YOU CHANGE THIS, you have to change the PROFF_xxx and
- * interrupt vectors in the table below to match.
- */
-#define SCC_IDX_BASE 1 /* table index */
-#endif
-
-
-/* Processors other than the 860 only get SMCs configured by default.
- * Either they don't have SCCs or they are allocated somewhere else.
- * Of course, there are now 860s without some SCCs, so we will need to
- * address that someday.
- * The Embedded Planet Multimedia I/O cards use TDM interfaces to the
- * stereo codec parts, and we use SMC2 to help support that.
- */
-static struct serial_state rs_table[] = {
-/* type line PORT IRQ FLAGS smc_scc_num (F.K.A. hub6) */
- { 0, 0, PRSLOT_SMC1, CPMVEC_SMC1, 0, 0 } /* SMC1 ttyS0 */
-#if USE_SMC2
- ,{ 0, 0, PRSLOT_SMC2, CPMVEC_SMC2, 0, 1 } /* SMC2 ttyS1 */
-#endif
-
-#if defined(CONFIG_SERIAL_68360_SCC)
- ,{ 0, 0, PRSLOT_SCC2, CPMVEC_SCC2, 0, (NUM_IS_SCC | 1) } /* SCC2 ttyS2 */
- ,{ 0, 0, PRSLOT_SCC3, CPMVEC_SCC3, 0, (NUM_IS_SCC | 2) } /* SCC3 ttyS3 */
- ,{ 0, 0, PRSLOT_SCC4, CPMVEC_SCC4, 0, (NUM_IS_SCC | 3) } /* SCC4 ttyS4 */
-#endif
-};
-
-#define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state))
-
-/* The number of buffer descriptors and their sizes.
- */
-#define RX_NUM_FIFO 4
-#define RX_BUF_SIZE 32
-#define TX_NUM_FIFO 4
-#define TX_BUF_SIZE 32
-
-#define CONSOLE_NUM_FIFO 2
-#define CONSOLE_BUF_SIZE 4
-
-char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE];
-
-/* The async_struct in serial.h does not really give us what we
- * need, so define our own here.
- */
-typedef struct serial_info {
- int magic;
- int flags;
-
- struct serial_state *state;
- /* struct serial_struct *state; */
- /* struct async_struct *state; */
-
- struct tty_struct *tty;
- int read_status_mask;
- int ignore_status_mask;
- int timeout;
- int line;
- int x_char; /* xon/xoff character */
- int close_delay;
- unsigned short closing_wait;
- unsigned short closing_wait2;
- unsigned long event;
- unsigned long last_active;
- int blocked_open; /* # of blocked opens */
- struct work_struct tqueue;
- struct work_struct tqueue_hangup;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
-
-
-/* CPM Buffer Descriptor pointers.
- */
- QUICC_BD *rx_bd_base;
- QUICC_BD *rx_cur;
- QUICC_BD *tx_bd_base;
- QUICC_BD *tx_cur;
-} ser_info_t;
-
-
-/* since kmalloc_init() does not get called until much after this initialization: */
-static ser_info_t quicc_ser_info[NR_PORTS];
-static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE];
-static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE];
-
-static void change_speed(ser_info_t *info);
-static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout);
-
-static inline int serial_paranoia_check(ser_info_t *info,
- char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for serial struct (%s) in %s\n";
- static const char *badinfo =
- "Warning: null async_struct for (%s) in %s\n";
-
- if (!info) {
- printk(badinfo, name, routine);
- return 1;
- }
- if (info->magic != SERIAL_MAGIC) {
- printk(badmagic, name, routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-/*
- * This is used to figure out the divisor speeds and the timeouts,
- * indexed by the termio value. The generic CPM functions are responsible
- * for setting and assigning baud rate generators for us.
- */
-static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
-
-/* This sucks. There is a better way: */
-#if defined(CONFIG_CONSOLE_9600)
- #define CONSOLE_BAUDRATE 9600
-#elif defined(CONFIG_CONSOLE_19200)
- #define CONSOLE_BAUDRATE 19200
-#elif defined(CONFIG_CONSOLE_115200)
- #define CONSOLE_BAUDRATE 115200
-#else
- #warning "console baud rate undefined"
- #define CONSOLE_BAUDRATE 9600
-#endif
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_360_stop(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int idx;
- unsigned long flags;
- volatile struct scc_regs *sccp;
- volatile struct smc_regs *smcp;
-
- if (serial_paranoia_check(info, tty->name, "rs_stop"))
- return;
-
- local_irq_save(flags);
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- sccp->scc_sccm &= ~UART_SCCM_TX;
- } else {
- /* smcp = &cpmp->cp_smc[idx]; */
- smcp = &pquicc->smc_regs[idx];
- smcp->smc_smcm &= ~SMCM_TX;
- }
- local_irq_restore(flags);
-}
-
-
-static void rs_360_start(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int idx;
- unsigned long flags;
- volatile struct scc_regs *sccp;
- volatile struct smc_regs *smcp;
-
- if (serial_paranoia_check(info, tty->name, "rs_stop"))
- return;
-
- local_irq_save(flags);
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- sccp->scc_sccm |= UART_SCCM_TX;
- } else {
- smcp = &pquicc->smc_regs[idx];
- smcp->smc_smcm |= SMCM_TX;
- }
- local_irq_restore(flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines. All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt(). They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off. People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible. After you are done making modifications, it is not a bad
- * idea to do:
- *
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-static _INLINE_ void receive_chars(ser_info_t *info)
-{
- struct tty_struct *tty = info->port.tty;
- unsigned char ch, flag, *cp;
- /*int ignored = 0;*/
- int i;
- ushort status;
- struct async_icount *icount;
- /* struct async_icount_24 *icount; */
- volatile QUICC_BD *bdp;
-
- icount = &info->state->icount;
-
- /* Just loop through the closed BDs and copy the characters into
- * the buffer.
- */
- bdp = info->rx_cur;
- for (;;) {
- if (bdp->status & BD_SC_EMPTY) /* If this one is empty */
- break; /* we are all done */
-
- /* The read status mask tell us what we should do with
- * incoming characters, especially if errors occur.
- * One special case is the use of BD_SC_EMPTY. If
- * this is not set, we are supposed to be ignoring
- * inputs. In this case, just mark the buffer empty and
- * continue.
- */
- if (!(info->read_status_mask & BD_SC_EMPTY)) {
- bdp->status |= BD_SC_EMPTY;
- bdp->status &=
- ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
-
- if (bdp->status & BD_SC_WRAP)
- bdp = info->rx_bd_base;
- else
- bdp++;
- continue;
- }
-
- /* Get the number of characters and the buffer pointer.
- */
- i = bdp->length;
- /* cp = (unsigned char *)__va(bdp->buf); */
- cp = (char *)bdp->buf;
- status = bdp->status;
-
- while (i-- > 0) {
- ch = *cp++;
- icount->rx++;
-
-#ifdef SERIAL_DEBUG_INTR
- printk("DR%02x:%02x...", ch, status);
-#endif
- flag = TTY_NORMAL;
-
- if (status & (BD_SC_BR | BD_SC_FR |
- BD_SC_PR | BD_SC_OV)) {
- /*
- * For statistics only
- */
- if (status & BD_SC_BR)
- icount->brk++;
- else if (status & BD_SC_PR)
- icount->parity++;
- else if (status & BD_SC_FR)
- icount->frame++;
- if (status & BD_SC_OV)
- icount->overrun++;
-
- /*
- * Now check to see if character should be
- * ignored, and mask off conditions which
- * should be ignored.
- if (status & info->ignore_status_mask) {
- if (++ignored > 100)
- break;
- continue;
- }
- */
- status &= info->read_status_mask;
-
- if (status & (BD_SC_BR)) {
-#ifdef SERIAL_DEBUG_INTR
- printk("handling break....");
-#endif
- *tty->flip.flag_buf_ptr = TTY_BREAK;
- if (info->flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (status & BD_SC_PR)
- flag = TTY_PARITY;
- else if (status & BD_SC_FR)
- flag = TTY_FRAME;
- }
- tty_insert_flip_char(tty, ch, flag);
- if (status & BD_SC_OV)
- /*
- * Overrun is special, since it's
- * reported immediately, and doesn't
- * affect the current character
- */
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- }
-
- /* This BD is ready to be used again. Clear status.
- * Get next BD.
- */
- bdp->status |= BD_SC_EMPTY;
- bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
-
- if (bdp->status & BD_SC_WRAP)
- bdp = info->rx_bd_base;
- else
- bdp++;
- }
-
- info->rx_cur = (QUICC_BD *)bdp;
-
- tty_schedule_flip(tty);
-}
-
-static _INLINE_ void receive_break(ser_info_t *info)
-{
- struct tty_struct *tty = info->port.tty;
-
- info->state->icount.brk++;
- /* Check to see if there is room in the tty buffer for
- * the break. If not, we exit now, losing the break. FIXME
- */
- tty_insert_flip_char(tty, 0, TTY_BREAK);
- tty_schedule_flip(tty);
-}
-
-static _INLINE_ void transmit_chars(ser_info_t *info)
-{
-
- if ((info->flags & TX_WAKEUP) ||
- (info->port.tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) {
- schedule_work(&info->tqueue);
- }
-
-#ifdef SERIAL_DEBUG_INTR
- printk("THRE...");
-#endif
-}
-
-#ifdef notdef
- /* I need to do this for the SCCs, so it is left as a reminder.
- */
-static _INLINE_ void check_modem_status(struct async_struct *info)
-{
- int status;
- /* struct async_icount *icount; */
- struct async_icount_24 *icount;
-
- status = serial_in(info, UART_MSR);
-
- if (status & UART_MSR_ANY_DELTA) {
- icount = &info->state->icount;
- /* update input line counters */
- if (status & UART_MSR_TERI)
- icount->rng++;
- if (status & UART_MSR_DDSR)
- icount->dsr++;
- if (status & UART_MSR_DDCD) {
- icount->dcd++;
-#ifdef CONFIG_HARD_PPS
- if ((info->flags & ASYNC_HARDPPS_CD) &&
- (status & UART_MSR_DCD))
- hardpps();
-#endif
- }
- if (status & UART_MSR_DCTS)
- icount->cts++;
- wake_up_interruptible(&info->delta_msr_wait);
- }
-
- if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
- printk("ttys%d CD now %s...", info->line,
- (status & UART_MSR_DCD) ? "on" : "off");
-#endif
- if (status & UART_MSR_DCD)
- wake_up_interruptible(&info->open_wait);
- else {
-#ifdef SERIAL_DEBUG_OPEN
- printk("scheduling hangup...");
-#endif
- queue_task(&info->tqueue_hangup,
- &tq_scheduler);
- }
- }
- if (info->flags & ASYNC_CTS_FLOW) {
- if (info->port.tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
- printk("CTS tx start...");
-#endif
- info->port.tty->hw_stopped = 0;
- info->IER |= UART_IER_THRI;
- serial_out(info, UART_IER, info->IER);
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
- return;
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
- printk("CTS tx stop...");
-#endif
- info->port.tty->hw_stopped = 1;
- info->IER &= ~UART_IER_THRI;
- serial_out(info, UART_IER, info->IER);
- }
- }
- }
-}
-#endif
-
-/*
- * This is the serial driver's interrupt routine for a single port
- */
-/* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */
-static void rs_360_interrupt(int vec, void *dev_id)
-{
- u_char events;
- int idx;
- ser_info_t *info;
- volatile struct smc_regs *smcp;
- volatile struct scc_regs *sccp;
-
- info = dev_id;
-
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- events = sccp->scc_scce;
- if (events & SCCM_RX)
- receive_chars(info);
- if (events & SCCM_TX)
- transmit_chars(info);
- sccp->scc_scce = events;
- } else {
- smcp = &pquicc->smc_regs[idx];
- events = smcp->smc_smce;
- if (events & SMCM_BRKE)
- receive_break(info);
- if (events & SMCM_RX)
- receive_chars(info);
- if (events & SMCM_TX)
- transmit_chars(info);
- smcp->smc_smce = events;
- }
-
-#ifdef SERIAL_DEBUG_INTR
- printk("rs_interrupt_single(%d, %x)...",
- info->state->smc_scc_num, events);
-#endif
-#ifdef modem_control
- check_modem_status(info);
-#endif
- info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
- printk("end.\n");
-#endif
-}
-
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-
-static void do_softint(void *private_)
-{
- ser_info_t *info = (ser_info_t *) private_;
- struct tty_struct *tty;
-
- tty = info->port.tty;
- if (!tty)
- return;
-
- if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event))
- tty_wakeup(tty);
-}
-
-
-/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred. The path of
- * hangup processing is:
- *
- * serial interrupt routine -> (scheduler tqueue) ->
- * do_serial_hangup() -> tty->hangup() -> rs_hangup()
- *
- */
-static void do_serial_hangup(void *private_)
-{
- struct async_struct *info = (struct async_struct *) private_;
- struct tty_struct *tty;
-
- tty = info->port.tty;
- if (!tty)
- return;
-
- tty_hangup(tty);
-}
-
-
-static int startup(ser_info_t *info)
-{
- unsigned long flags;
- int retval=0;
- int idx;
- /*struct serial_state *state = info->state;*/
- volatile struct smc_regs *smcp;
- volatile struct scc_regs *sccp;
- volatile struct smc_uart_pram *up;
- volatile struct uart_pram *scup;
-
-
- local_irq_save(flags);
-
- if (info->flags & ASYNC_INITIALIZED) {
- goto errout;
- }
-
-#ifdef maybe
- if (!state->port || !state->type) {
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
- goto errout;
- }
-#endif
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("starting up ttys%d (irq %d)...", info->line, state->irq);
-#endif
-
-
-#ifdef modem_control
- info->MCR = 0;
- if (info->port.tty->termios->c_cflag & CBAUD)
- info->MCR = UART_MCR_DTR | UART_MCR_RTS;
-#endif
-
- if (info->port.tty)
- clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- /*
- * and set the speed of the serial port
- */
- change_speed(info);
-
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- scup = &pquicc->pram[info->state->port].scc.pscc.u;
-
- scup->mrblr = RX_BUF_SIZE;
- scup->max_idl = RX_BUF_SIZE;
-
- sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX);
- sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- } else {
- smcp = &pquicc->smc_regs[idx];
-
- /* Enable interrupts and I/O.
- */
- smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
- smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN);
-
- /* We can tune the buffer length and idle characters
- * to take advantage of the entire incoming buffer size.
- * If mrblr is something other than 1, maxidl has to be
- * non-zero or we never get an interrupt. The maxidl
- * is the number of character times we wait after reception
- * of the last character before we decide no more characters
- * are coming.
- */
- /* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */
- /* holy unionized structures, Batman: */
- up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
-
- up->mrblr = RX_BUF_SIZE;
- up->max_idl = RX_BUF_SIZE;
-
- up->brkcr = 1; /* number of break chars */
- }
-
- info->flags |= ASYNC_INITIALIZED;
- local_irq_restore(flags);
- return 0;
-
-errout:
- local_irq_restore(flags);
- return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(ser_info_t *info)
-{
- unsigned long flags;
- struct serial_state *state;
- int idx;
- volatile struct smc_regs *smcp;
- volatile struct scc_regs *sccp;
-
- if (!(info->flags & ASYNC_INITIALIZED))
- return;
-
- state = info->state;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("Shutting down serial port %d (irq %d)....", info->line,
- state->irq);
-#endif
-
- local_irq_save(flags);
-
- idx = PORT_NUM(state->smc_scc_num);
- if (state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-#ifdef CONFIG_SERIAL_CONSOLE
- /* We can't disable the transmitter if this is the
- * system console.
- */
- if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
-#endif
- sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
- } else {
- smcp = &pquicc->smc_regs[idx];
-
- /* Disable interrupts and I/O.
- */
- smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
-#ifdef CONFIG_SERIAL_CONSOLE
- /* We can't disable the transmitter if this is the
- * system console.
- */
- if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT)
-#endif
- smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
- }
-
- if (info->port.tty)
- set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
- info->flags &= ~ASYNC_INITIALIZED;
- local_irq_restore(flags);
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(ser_info_t *info)
-{
- int baud_rate;
- unsigned cflag, cval, scval, prev_mode;
- int i, bits, sbits, idx;
- unsigned long flags;
- struct serial_state *state;
- volatile struct smc_regs *smcp;
- volatile struct scc_regs *sccp;
-
- if (!info->port.tty || !info->port.tty->termios)
- return;
- cflag = info->port.tty->termios->c_cflag;
-
- state = info->state;
-
- /* Character length programmed into the mode register is the
- * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
- * 1 or 2 stop bits, minus 1.
- * The value 'bits' counts this for us.
- */
- cval = 0;
- scval = 0;
-
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5: bits = 5; break;
- case CS6: bits = 6; break;
- case CS7: bits = 7; break;
- case CS8: bits = 8; break;
- /* Never happens, but GCC is too dumb to figure it out */
- default: bits = 8; break;
- }
- sbits = bits - 5;
-
- if (cflag & CSTOPB) {
- cval |= SMCMR_SL; /* Two stops */
- scval |= SCU_PMSR_SL;
- bits++;
- }
- if (cflag & PARENB) {
- cval |= SMCMR_PEN;
- scval |= SCU_PMSR_PEN;
- bits++;
- }
- if (!(cflag & PARODD)) {
- cval |= SMCMR_PM_EVEN;
- scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP);
- }
-
- /* Determine divisor based on baud rate */
- i = cflag & CBAUD;
- if (i >= (sizeof(baud_table)/sizeof(int)))
- baud_rate = 9600;
- else
- baud_rate = baud_table[i];
-
- info->timeout = (TX_BUF_SIZE*HZ*bits);
- info->timeout += HZ/50; /* Add .02 seconds of slop */
-
-#ifdef modem_control
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- if (info->flags & ASYNC_HARDPPS_CD)
- info->IER |= UART_IER_MSI;
- if (cflag & CRTSCTS) {
- info->flags |= ASYNC_CTS_FLOW;
- info->IER |= UART_IER_MSI;
- } else
- info->flags &= ~ASYNC_CTS_FLOW;
- if (cflag & CLOCAL)
- info->flags &= ~ASYNC_CHECK_CD;
- else {
- info->flags |= ASYNC_CHECK_CD;
- info->IER |= UART_IER_MSI;
- }
- serial_out(info, UART_IER, info->IER);
-#endif
-
- /*
- * Set up parity check flag
- */
- info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
- if (I_INPCK(info->port.tty))
- info->read_status_mask |= BD_SC_FR | BD_SC_PR;
- if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
- info->read_status_mask |= BD_SC_BR;
-
- /*
- * Characters to ignore
- */
- info->ignore_status_mask = 0;
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
- if (I_IGNBRK(info->port.tty)) {
- info->ignore_status_mask |= BD_SC_BR;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->port.tty))
- info->ignore_status_mask |= BD_SC_OV;
- }
- /*
- * !!! ignore all characters if CREAD is not set
- */
- if ((cflag & CREAD) == 0)
- info->read_status_mask &= ~BD_SC_EMPTY;
- local_irq_save(flags);
-
- /* Start bit has not been added (so don't, because we would just
- * subtract it later), and we need to add one for the number of
- * stops bits (there is always at least one).
- */
- bits++;
- idx = PORT_NUM(state->smc_scc_num);
- if (state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- sccp->scc_psmr = (sbits << 12) | scval;
- } else {
- smcp = &pquicc->smc_regs[idx];
-
- /* Set the mode register. We want to keep a copy of the
- * enables, because we want to put them back if they were
- * present.
- */
- prev_mode = smcp->smc_smcmr;
- smcp->smc_smcmr = smcr_mk_clen(bits) | cval | SMCMR_SM_UART;
- smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN));
- }
-
- m360_cpm_setbrg((state - rs_table), baud_rate);
-
- local_irq_restore(flags);
-}
-
-static void rs_360_put_char(struct tty_struct *tty, unsigned char ch)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- volatile QUICC_BD *bdp;
-
- if (serial_paranoia_check(info, tty->name, "rs_put_char"))
- return 0;
-
- if (!tty)
- return 0;
-
- bdp = info->tx_cur;
- while (bdp->status & BD_SC_READY);
-
- /* *((char *)__va(bdp->buf)) = ch; */
- *((char *)bdp->buf) = ch;
- bdp->length = 1;
- bdp->status |= BD_SC_READY;
-
- /* Get next BD.
- */
- if (bdp->status & BD_SC_WRAP)
- bdp = info->tx_bd_base;
- else
- bdp++;
-
- info->tx_cur = (QUICC_BD *)bdp;
- return 1;
-
-}
-
-static int rs_360_write(struct tty_struct * tty,
- const unsigned char *buf, int count)
-{
- int c, ret = 0;
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- volatile QUICC_BD *bdp;
-
-#ifdef CONFIG_KGDB
- /* Try to let stub handle output. Returns true if it did. */
- if (kgdb_output_string(buf, count))
- return ret;
-#endif
-
- if (serial_paranoia_check(info, tty->name, "rs_write"))
- return 0;
-
- if (!tty)
- return 0;
-
- bdp = info->tx_cur;
-
- while (1) {
- c = min(count, TX_BUF_SIZE);
-
- if (c <= 0)
- break;
-
- if (bdp->status & BD_SC_READY) {
- info->flags |= TX_WAKEUP;
- break;
- }
-
- /* memcpy(__va(bdp->buf), buf, c); */
- memcpy((void *)bdp->buf, buf, c);
-
- bdp->length = c;
- bdp->status |= BD_SC_READY;
-
- buf += c;
- count -= c;
- ret += c;
-
- /* Get next BD.
- */
- if (bdp->status & BD_SC_WRAP)
- bdp = info->tx_bd_base;
- else
- bdp++;
- info->tx_cur = (QUICC_BD *)bdp;
- }
- return ret;
-}
-
-static int rs_360_write_room(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int ret;
-
- if (serial_paranoia_check(info, tty->name, "rs_write_room"))
- return 0;
-
- if ((info->tx_cur->status & BD_SC_READY) == 0) {
- info->flags &= ~TX_WAKEUP;
- ret = TX_BUF_SIZE;
- }
- else {
- info->flags |= TX_WAKEUP;
- ret = 0;
- }
- return ret;
-}
-
-/* I could track this with transmit counters....maybe later.
-*/
-static int rs_360_chars_in_buffer(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
- return 0;
- return 0;
-}
-
-static void rs_360_flush_buffer(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
- return;
-
- /* There is nothing to "flush", whatever we gave the CPM
- * is on its way out.
- */
- tty_wakeup(tty);
- info->flags &= ~TX_WAKEUP;
-}
-
-/*
- * This function is used to send a high-priority XON/XOFF character to
- * the device
- */
-static void rs_360_send_xchar(struct tty_struct *tty, char ch)
-{
- volatile QUICC_BD *bdp;
-
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->name, "rs_send_char"))
- return;
-
- bdp = info->tx_cur;
- while (bdp->status & BD_SC_READY);
-
- /* *((char *)__va(bdp->buf)) = ch; */
- *((char *)bdp->buf) = ch;
- bdp->length = 1;
- bdp->status |= BD_SC_READY;
-
- /* Get next BD.
- */
- if (bdp->status & BD_SC_WRAP)
- bdp = info->tx_bd_base;
- else
- bdp++;
-
- info->tx_cur = (QUICC_BD *)bdp;
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_360_throttle(struct tty_struct * tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("throttle %s: %d....\n", _tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (serial_paranoia_check(info, tty->name, "rs_throttle"))
- return;
-
- if (I_IXOFF(tty))
- rs_360_send_xchar(tty, STOP_CHAR(tty));
-
-#ifdef modem_control
- if (tty->termios->c_cflag & CRTSCTS)
- info->MCR &= ~UART_MCR_RTS;
-
- local_irq_disable();
- serial_out(info, UART_MCR, info->MCR);
- local_irq_enable();
-#endif
-}
-
-static void rs_360_unthrottle(struct tty_struct * tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- rs_360_send_xchar(tty, START_CHAR(tty));
- }
-#ifdef modem_control
- if (tty->termios->c_cflag & CRTSCTS)
- info->MCR |= UART_MCR_RTS;
- local_irq_disable();
- serial_out(info, UART_MCR, info->MCR);
- local_irq_enable();
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-#ifdef maybe
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int get_lsr_info(struct async_struct * info, unsigned int *value)
-{
- unsigned char status;
- unsigned int result;
-
- local_irq_disable();
- status = serial_in(info, UART_LSR);
- local_irq_enable();
- result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
- return put_user(result,value);
-}
-#endif
-
-static int rs_360_tiocmget(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- unsigned int result = 0;
-#ifdef modem_control
- unsigned char control, status;
-
- if (serial_paranoia_check(info, tty->name, __func__))
- return -ENODEV;
-
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
-
- control = info->MCR;
- local_irq_disable();
- status = serial_in(info, UART_MSR);
- local_irq_enable();
- result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
- | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
-#ifdef TIOCM_OUT1
- | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
- | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
-#endif
- | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
- | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
- | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
- | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
-#endif
- return result;
-}
-
-static int rs_360_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
-#ifdef modem_control
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- unsigned int arg;
-
- if (serial_paranoia_check(info, tty->name, __func__))
- return -ENODEV;
-
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- /* FIXME: locking on info->mcr */
- if (set & TIOCM_RTS)
- info->mcr |= UART_MCR_RTS;
- if (set & TIOCM_DTR)
- info->mcr |= UART_MCR_DTR;
- if (clear & TIOCM_RTS)
- info->MCR &= ~UART_MCR_RTS;
- if (clear & TIOCM_DTR)
- info->MCR &= ~UART_MCR_DTR;
-
-#ifdef TIOCM_OUT1
- if (set & TIOCM_OUT1)
- info->MCR |= UART_MCR_OUT1;
- if (set & TIOCM_OUT2)
- info->MCR |= UART_MCR_OUT2;
- if (clear & TIOCM_OUT1)
- info->MCR &= ~UART_MCR_OUT1;
- if (clear & TIOCM_OUT2)
- info->MCR &= ~UART_MCR_OUT2;
-#endif
-
- local_irq_disable();
- serial_out(info, UART_MCR, info->MCR);
- local_irq_enable();
-#endif
- return 0;
-}
-
-/* Sending a break is a two step process on the SMC/SCC. It is accomplished
- * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT
- * command. We take advantage of the begin/end functions to make this
- * happen.
- */
-static ushort smc_chan_map[] = {
- CPM_CR_CH_SMC1,
- CPM_CR_CH_SMC2
-};
-
-static ushort scc_chan_map[] = {
- CPM_CR_CH_SCC1,
- CPM_CR_CH_SCC2,
- CPM_CR_CH_SCC3,
- CPM_CR_CH_SCC4
-};
-
-static void begin_break(ser_info_t *info)
-{
- volatile QUICC *cp;
- ushort chan;
- int idx;
-
- cp = pquicc;
-
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC)
- chan = scc_chan_map[idx];
- else
- chan = smc_chan_map[idx];
-
- cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG;
- while (cp->cp_cr & CPM_CR_FLG);
-}
-
-static void end_break(ser_info_t *info)
-{
- volatile QUICC *cp;
- ushort chan;
- int idx;
-
- cp = pquicc;
-
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC)
- chan = scc_chan_map[idx];
- else
- chan = smc_chan_map[idx];
-
- cp->cp_cr = mk_cr_cmd(chan, CPM_CR_RESTART_TX) | CPM_CR_FLG;
- while (cp->cp_cr & CPM_CR_FLG);
-}
-
-/*
- * This routine sends a break character out the serial port.
- */
-static void send_break(ser_info_t *info, unsigned int duration)
-{
-#ifdef SERIAL_DEBUG_SEND_BREAK
- printk("rs_send_break(%d) jiff=%lu...", duration, jiffies);
-#endif
- begin_break(info);
- msleep_interruptible(duration);
- end_break(info);
-#ifdef SERIAL_DEBUG_SEND_BREAK
- printk("done jiffies=%lu\n", jiffies);
-#endif
-}
-
-
-/*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
-static int rs_360_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- struct async_icount cnow;
-
- local_irq_disable();
- cnow = info->state->icount;
- local_irq_enable();
-
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
-
- return 0;
-}
-
-static int rs_360_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- int error;
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int retval;
- struct async_icount cnow;
- /* struct async_icount_24 cnow;*/ /* kernel counter temps */
- struct serial_icounter_struct *p_cuser; /* user space */
-
- if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
- return -ENODEV;
-
- if (cmd != TIOCMIWAIT) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (signal_pending(current))
- return -EINTR;
- if (!arg) {
- send_break(info, 250); /* 1/4 second */
- if (signal_pending(current))
- return -EINTR;
- }
- return 0;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (signal_pending(current))
- return -EINTR;
- send_break(info, arg ? arg*100 : 250);
- if (signal_pending(current))
- return -EINTR;
- return 0;
- case TIOCSBRK:
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- begin_break(info);
- return 0;
- case TIOCCBRK:
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- end_break(info);
- return 0;
-#ifdef maybe
- case TIOCSERGETLSR: /* Get line status register */
- return get_lsr_info(info, (unsigned int *) arg);
-#endif
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
-#ifdef modem_control
- local_irq_disable();
- /* note the counters on entry */
- cprev = info->state->icount;
- local_irq_enable();
- while (1) {
- interruptible_sleep_on(&info->delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return -ERESTARTSYS;
- local_irq_disable();
- cnow = info->state->icount; /* atomic copy */
- local_irq_enable();
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
- return -EIO; /* no change => error */
- if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
- return 0;
- }
- cprev = cnow;
- }
- /* NOTREACHED */
-#else
- return 0;
-#endif
-
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-/* FIX UP modem control here someday......
-*/
-static void rs_360_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- change_speed(info);
-
-#ifdef modem_control
- /* Handle transition to B0 status */
- if ((old_termios->c_cflag & CBAUD) &&
- !(tty->termios->c_cflag & CBAUD)) {
- info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
- local_irq_disable();
- serial_out(info, UART_MCR, info->MCR);
- local_irq_enable();
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- (tty->termios->c_cflag & CBAUD)) {
- info->MCR |= UART_MCR_DTR;
- if (!tty->hw_stopped ||
- !(tty->termios->c_cflag & CRTSCTS)) {
- info->MCR |= UART_MCR_RTS;
- }
- local_irq_disable();
- serial_out(info, UART_MCR, info->MCR);
- local_irq_enable();
- }
-
- /* Handle turning off CRTSCTS */
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rs_360_start(tty);
- }
-#endif
-
-#if 0
- /*
- * No need to wake up processes in open wait, since they
- * sample the CLOCAL flag once, and don't recheck it.
- * XXX It's not clear whether the current behavior is correct
- * or not. Hence, this may change.....
- */
- if (!(old_termios->c_cflag & CLOCAL) &&
- (tty->termios->c_cflag & CLOCAL))
- wake_up_interruptible(&info->open_wait);
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- *
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void rs_360_close(struct tty_struct *tty, struct file * filp)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- /* struct async_state *state; */
- struct serial_state *state;
- unsigned long flags;
- int idx;
- volatile struct smc_regs *smcp;
- volatile struct scc_regs *sccp;
-
- if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
- return;
-
- state = info->state;
-
- local_irq_save(flags);
-
- if (tty_hung_up_p(filp)) {
- DBG_CNT("before DEC-hung");
- local_irq_restore(flags);
- return;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_close ttys%d, count = %d\n", info->line, state->count);
-#endif
- if ((tty->count == 1) && (state->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. state->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk("rs_close: bad serial port count; tty->count is 1, "
- "state->count is %d\n", state->count);
- state->count = 1;
- }
- if (--state->count < 0) {
- printk("rs_close: bad serial port count for ttys%d: %d\n",
- info->line, state->count);
- state->count = 0;
- }
- if (state->count) {
- DBG_CNT("before DEC-2");
- local_irq_restore(flags);
- return;
- }
- info->flags |= ASYNC_CLOSING;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->read_status_mask &= ~BD_SC_EMPTY;
- if (info->flags & ASYNC_INITIALIZED) {
-
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC) {
- sccp = &pquicc->scc_regs[idx];
- sccp->scc_sccm &= ~UART_SCCM_RX;
- sccp->scc_gsmr.w.low &= ~SCC_GSMRL_ENR;
- } else {
- smcp = &pquicc->smc_regs[idx];
- smcp->smc_smcm &= ~SMCM_RX;
- smcp->smc_smcmr &= ~SMCMR_REN;
- }
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- rs_360_wait_until_sent(tty, info->timeout);
- }
- shutdown(info);
- rs_360_flush_buffer(tty);
- tty_ldisc_flush(tty);
- tty->closing = 0;
- info->event = 0;
- info->port.tty = NULL;
- if (info->blocked_open) {
- if (info->close_delay) {
- msleep_interruptible(jiffies_to_msecs(info->close_delay));
- }
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
- local_irq_restore(flags);
-}
-
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- unsigned long orig_jiffies, char_time;
- /*int lsr;*/
- volatile QUICC_BD *bdp;
-
- if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
- return;
-
-#ifdef maybe
- if (info->state->type == PORT_UNKNOWN)
- return;
-#endif
-
- orig_jiffies = jiffies;
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = 1;
- if (timeout)
- char_time = min(char_time, (unsigned long)timeout);
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
- printk("jiff=%lu...", jiffies);
-#endif
-
- /* We go through the loop at least once because we can't tell
- * exactly when the last character exits the shifter. There can
- * be at least two characters waiting to be sent after the buffers
- * are empty.
- */
- do {
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
-#endif
-/* current->counter = 0; make us low-priority */
- msleep_interruptible(jiffies_to_msecs(char_time));
- if (signal_pending(current))
- break;
- if (timeout && (time_after(jiffies, orig_jiffies + timeout)))
- break;
- /* The 'tx_cur' is really the next buffer to send. We
- * have to back up to the previous BD and wait for it
- * to go. This isn't perfect, because all this indicates
- * is the buffer is available. There are still characters
- * in the CPM FIFO.
- */
- bdp = info->tx_cur;
- if (bdp == info->tx_bd_base)
- bdp += (TX_NUM_FIFO-1);
- else
- bdp--;
- } while (bdp->status & BD_SC_READY);
- current->state = TASK_RUNNING;
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
-#endif
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void rs_360_hangup(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- struct serial_state *state = info->state;
-
- if (serial_paranoia_check(info, tty->name, "rs_hangup"))
- return;
-
- state = info->state;
-
- rs_360_flush_buffer(tty);
- shutdown(info);
- info->event = 0;
- state->count = 0;
- info->flags &= ~ASYNC_NORMAL_ACTIVE;
- info->port.tty = NULL;
- wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
- ser_info_t *info)
-{
-#ifdef DO_THIS_LATER
- DECLARE_WAITQUEUE(wait, current);
-#endif
- struct serial_state *state = info->state;
- int retval;
- int do_clocal = 0;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- * If this is an SMC port, we don't have modem control to wait
- * for, so just get out here.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR)) ||
- !(info->state->smc_scc_num & NUM_IS_SCC)) {
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, state->count is dropped by one, so that
- * rs_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
-#ifdef DO_THIS_LATER
- add_wait_queue(&info->open_wait, &wait);
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready before block: ttys%d, count = %d\n",
- state->line, state->count);
-#endif
- local_irq_disable();
- if (!tty_hung_up_p(filp))
- state->count--;
- local_irq_enable();
- info->blocked_open++;
- while (1) {
- local_irq_disable();
- if (tty->termios->c_cflag & CBAUD)
- serial_out(info, UART_MCR,
- serial_inp(info, UART_MCR) |
- (UART_MCR_DTR | UART_MCR_RTS));
- local_irq_enable();
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(info->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- if (!(info->flags & ASYNC_CLOSING) &&
- (do_clocal || (serial_in(info, UART_MSR) &
- UART_MSR_DCD)))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready blocking: ttys%d, count = %d\n",
- info->line, state->count);
-#endif
- tty_unlock();
- schedule();
- tty_lock();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&info->open_wait, &wait);
- if (!tty_hung_up_p(filp))
- state->count++;
- info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready after blocking: ttys%d, count = %d\n",
- info->line, state->count);
-#endif
-#endif /* DO_THIS_LATER */
- if (retval)
- return retval;
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
-}
-
-static int get_async_struct(int line, ser_info_t **ret_info)
-{
- struct serial_state *sstate;
-
- sstate = rs_table + line;
- if (sstate->info) {
- sstate->count++;
- *ret_info = (ser_info_t *)sstate->info;
- return 0;
- }
- else {
- return -ENOMEM;
- }
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int rs_360_open(struct tty_struct *tty, struct file * filp)
-{
- ser_info_t *info;
- int retval, line;
-
- line = tty->index;
- if ((line < 0) || (line >= NR_PORTS))
- return -ENODEV;
- retval = get_async_struct(line, &info);
- if (retval)
- return retval;
- if (serial_paranoia_check(info, tty->name, "rs_open"))
- return -ENODEV;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open %s, count = %d\n", tty->name, info->state->count);
-#endif
- tty->driver_data = info;
- info->port.tty = tty;
-
- /*
- * Start up serial port
- */
- retval = startup(info);
- if (retval)
- return retval;
-
- retval = block_til_ready(tty, filp, info);
- if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open returning after block_til_ready with %d\n",
- retval);
-#endif
- return retval;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open %s successful...", tty->name);
-#endif
- return 0;
-}
-
-/*
- * /proc fs routines....
- */
-
-static inline int line_info(char *buf, struct serial_state *state)
-{
-#ifdef notdef
- struct async_struct *info = state->info, scr_info;
- char stat_buf[30], control, status;
-#endif
- int ret;
-
- ret = sprintf(buf, "%d: uart:%s port:%X irq:%d",
- state->line,
- (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC",
- (unsigned int)(state->port), state->irq);
-
- if (!state->port || (state->type == PORT_UNKNOWN)) {
- ret += sprintf(buf+ret, "\n");
- return ret;
- }
-
-#ifdef notdef
- /*
- * Figure out the current RS-232 lines
- */
- if (!info) {
- info = &scr_info; /* This is just for serial_{in,out} */
-
- info->magic = SERIAL_MAGIC;
- info->port = state->port;
- info->flags = state->flags;
- info->quot = 0;
- info->port.tty = NULL;
- }
- local_irq_disable();
- status = serial_in(info, UART_MSR);
- control = info ? info->MCR : serial_in(info, UART_MCR);
- local_irq_enable();
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if (control & UART_MCR_RTS)
- strcat(stat_buf, "|RTS");
- if (status & UART_MSR_CTS)
- strcat(stat_buf, "|CTS");
- if (control & UART_MCR_DTR)
- strcat(stat_buf, "|DTR");
- if (status & UART_MSR_DSR)
- strcat(stat_buf, "|DSR");
- if (status & UART_MSR_DCD)
- strcat(stat_buf, "|CD");
- if (status & UART_MSR_RI)
- strcat(stat_buf, "|RI");
-
- if (info->quot) {
- ret += sprintf(buf+ret, " baud:%d",
- state->baud_base / info->quot);
- }
-
- ret += sprintf(buf+ret, " tx:%d rx:%d",
- state->icount.tx, state->icount.rx);
-
- if (state->icount.frame)
- ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
-
- if (state->icount.parity)
- ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
-
- if (state->icount.brk)
- ret += sprintf(buf+ret, " brk:%d", state->icount.brk);
-
- if (state->icount.overrun)
- ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
-
- /*
- * Last thing is the RS-232 status lines
- */
- ret += sprintf(buf+ret, " %s\n", stat_buf+1);
-#endif
- return ret;
-}
-
-int rs_360_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
-{
- int i, len = 0;
- off_t begin = 0;
-
- len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version);
- for (i = 0; i < NR_PORTS && len < 4000; i++) {
- len += line_info(page + len, &rs_table[i]);
- if (len+begin > off+count)
- goto done;
- if (len+begin < off) {
- begin += len;
- len = 0;
- }
- }
- *eof = 1;
-done:
- if (off >= len+begin)
- return 0;
- *start = page + (begin-off);
- return ((count < begin+len-off) ? count : begin+len-off);
-}
-
-/*
- * ---------------------------------------------------------------------
- * rs_init() and friends
- *
- * rs_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-/*
- * This routine prints out the appropriate serial driver version
- * number, and identifies which options were configured into this
- * driver.
- */
-static _INLINE_ void show_serial_version(void)
-{
- printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
-}
-
-
-/*
- * The serial console driver used during boot. Note that these names
- * clash with those found in "serial.c", so we currently can't support
- * the 16xxx uarts and these at the same time. I will fix this to become
- * an indirect function call from tty_io.c (or something).
- */
-
-#ifdef CONFIG_SERIAL_CONSOLE
-
-/*
- * Print a string to the serial port trying not to disturb any possible
- * real use of the port...
- */
-static void my_console_write(int idx, const char *s,
- unsigned count)
-{
- struct serial_state *ser;
- ser_info_t *info;
- unsigned i;
- QUICC_BD *bdp, *bdbase;
- volatile struct smc_uart_pram *up;
- volatile u_char *cp;
-
- ser = rs_table + idx;
-
-
- /* If the port has been initialized for general use, we have
- * to use the buffer descriptors allocated there. Otherwise,
- * we simply use the single buffer allocated.
- */
- if ((info = (ser_info_t *)ser->info) != NULL) {
- bdp = info->tx_cur;
- bdbase = info->tx_bd_base;
- }
- else {
- /* Pointer to UART in parameter ram.
- */
- /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
- up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
-
- /* Get the address of the host memory buffer.
- */
- bdp = bdbase = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
- }
-
- /*
- * We need to gracefully shut down the transmitter, disable
- * interrupts, then send our bytes out.
- */
-
- /*
- * Now, do each character. This is not as bad as it looks
- * since this is a holding FIFO and not a transmitting FIFO.
- * We could add the complexity of filling the entire transmit
- * buffer, but we would just wait longer between accesses......
- */
- for (i = 0; i < count; i++, s++) {
- /* Wait for transmitter fifo to empty.
- * Ready indicates output is ready, and xmt is doing
- * that, not that it is ready for us to send.
- */
- while (bdp->status & BD_SC_READY);
-
- /* Send the character out.
- */
- cp = bdp->buf;
- *cp = *s;
-
- bdp->length = 1;
- bdp->status |= BD_SC_READY;
-
- if (bdp->status & BD_SC_WRAP)
- bdp = bdbase;
- else
- bdp++;
-
- /* if a LF, also do CR... */
- if (*s == 10) {
- while (bdp->status & BD_SC_READY);
- /* cp = __va(bdp->buf); */
- cp = bdp->buf;
- *cp = 13;
- bdp->length = 1;
- bdp->status |= BD_SC_READY;
-
- if (bdp->status & BD_SC_WRAP) {
- bdp = bdbase;
- }
- else {
- bdp++;
- }
- }
- }
-
- /*
- * Finally, Wait for transmitter & holding register to empty
- * and restore the IER
- */
- while (bdp->status & BD_SC_READY);
-
- if (info)
- info->tx_cur = (QUICC_BD *)bdp;
-}
-
-static void serial_console_write(struct console *c, const char *s,
- unsigned count)
-{
-#ifdef CONFIG_KGDB
- /* Try to let stub handle output. Returns true if it did. */
- if (kgdb_output_string(s, count))
- return;
-#endif
- my_console_write(c->index, s, count);
-}
-
-
-
-/*void console_print_68360(const char *p)
-{
- const char *cp = p;
- int i;
-
- for (i=0;cp[i]!=0;i++);
-
- serial_console_write (p, i);
-
- //Comment this if you want to have a strict interrupt-driven output
- //rs_fair_output();
-
- return;
-}*/
-
-
-
-
-
-
-#ifdef CONFIG_XMON
-int
-xmon_360_write(const char *s, unsigned count)
-{
- my_console_write(0, s, count);
- return(count);
-}
-#endif
-
-#ifdef CONFIG_KGDB
-void
-putDebugChar(char ch)
-{
- my_console_write(0, &ch, 1);
-}
-#endif
-
-/*
- * Receive character from the serial port. This only works well
- * before the port is initialized for real use.
- */
-static int my_console_wait_key(int idx, int xmon, char *obuf)
-{
- struct serial_state *ser;
- u_char c, *cp;
- ser_info_t *info;
- QUICC_BD *bdp;
- volatile struct smc_uart_pram *up;
- int i;
-
- ser = rs_table + idx;
-
- /* Get the address of the host memory buffer.
- * If the port has been initialized for general use, we must
- * use information from the port structure.
- */
- if ((info = (ser_info_t *)ser->info))
- bdp = info->rx_cur;
- else
- /* bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; */
- bdp = (QUICC_BD *)((uint)pquicc + (uint)up->tbase);
-
- /* Pointer to UART in parameter ram.
- */
- /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */
- up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
-
- /*
- * We need to gracefully shut down the receiver, disable
- * interrupts, then read the input.
- * XMON just wants a poll. If no character, return -1, else
- * return the character.
- */
- if (!xmon) {
- while (bdp->status & BD_SC_EMPTY);
- }
- else {
- if (bdp->status & BD_SC_EMPTY)
- return -1;
- }
-
- cp = (char *)bdp->buf;
-
- if (obuf) {
- i = c = bdp->length;
- while (i-- > 0)
- *obuf++ = *cp++;
- }
- else {
- c = *cp;
- }
- bdp->status |= BD_SC_EMPTY;
-
- if (info) {
- if (bdp->status & BD_SC_WRAP) {
- bdp = info->rx_bd_base;
- }
- else {
- bdp++;
- }
- info->rx_cur = (QUICC_BD *)bdp;
- }
-
- return((int)c);
-}
-
-static int serial_console_wait_key(struct console *co)
-{
- return(my_console_wait_key(co->index, 0, NULL));
-}
-
-#ifdef CONFIG_XMON
-int
-xmon_360_read_poll(void)
-{
- return(my_console_wait_key(0, 1, NULL));
-}
-
-int
-xmon_360_read_char(void)
-{
- return(my_console_wait_key(0, 0, NULL));
-}
-#endif
-
-#ifdef CONFIG_KGDB
-static char kgdb_buf[RX_BUF_SIZE], *kgdp;
-static int kgdb_chars;
-
-unsigned char
-getDebugChar(void)
-{
- if (kgdb_chars <= 0) {
- kgdb_chars = my_console_wait_key(0, 0, kgdb_buf);
- kgdp = kgdb_buf;
- }
- kgdb_chars--;
-
- return(*kgdp++);
-}
-
-void kgdb_interruptible(int state)
-{
-}
-void kgdb_map_scc(void)
-{
- struct serial_state *ser;
- uint mem_addr;
- volatile QUICC_BD *bdp;
- volatile smc_uart_t *up;
-
- cpmp = (cpm360_t *)&(((immap_t *)IMAP_ADDR)->im_cpm);
-
- /* To avoid data cache CPM DMA coherency problems, allocate a
- * buffer in the CPM DPRAM. This will work until the CPM and
- * serial ports are initialized. At that time a memory buffer
- * will be allocated.
- * The port is already initialized from the boot procedure, all
- * we do here is give it a different buffer and make it a FIFO.
- */
-
- ser = rs_table;
-
- /* Right now, assume we are using SMCs.
- */
- up = (smc_uart_t *)&cpmp->cp_dparam[ser->port];
-
- /* Allocate space for an input FIFO, plus a few bytes for output.
- * Allocate bytes to maintain word alignment.
- */
- mem_addr = (uint)(&cpmp->cp_dpmem[0x1000]);
-
- /* Set the physical address of the host memory buffers in
- * the buffer descriptors.
- */
- bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase];
- bdp->buf = mem_addr;
-
- bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_tbase];
- bdp->buf = mem_addr+RX_BUF_SIZE;
-
- up->smc_mrblr = RX_BUF_SIZE; /* receive buffer length */
- up->smc_maxidl = RX_BUF_SIZE;
-}
-#endif
-
-static struct tty_struct *serial_console_device(struct console *c, int *index)
-{
- *index = c->index;
- return serial_driver;
-}
-
-
-struct console sercons = {
- .name = "ttyS",
- .write = serial_console_write,
- .device = serial_console_device,
- .wait_key = serial_console_wait_key,
- .setup = serial_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = CONFIG_SERIAL_CONSOLE_PORT,
-};
-
-
-
-/*
- * Register console.
- */
-long console_360_init(long kmem_start, long kmem_end)
-{
- register_console(&sercons);
- /*register_console (console_print_68360); - 2.0.38 only required a write
- function pointer. */
- return kmem_start;
-}
-
-#endif
-
-/* Index in baud rate table of the default console baud rate.
-*/
-static int baud_idx;
-
-static const struct tty_operations rs_360_ops = {
- .owner = THIS_MODULE,
- .open = rs_360_open,
- .close = rs_360_close,
- .write = rs_360_write,
- .put_char = rs_360_put_char,
- .write_room = rs_360_write_room,
- .chars_in_buffer = rs_360_chars_in_buffer,
- .flush_buffer = rs_360_flush_buffer,
- .ioctl = rs_360_ioctl,
- .throttle = rs_360_throttle,
- .unthrottle = rs_360_unthrottle,
- /* .send_xchar = rs_360_send_xchar, */
- .set_termios = rs_360_set_termios,
- .stop = rs_360_stop,
- .start = rs_360_start,
- .hangup = rs_360_hangup,
- /* .wait_until_sent = rs_360_wait_until_sent, */
- /* .read_proc = rs_360_read_proc, */
- .tiocmget = rs_360_tiocmget,
- .tiocmset = rs_360_tiocmset,
- .get_icount = rs_360_get_icount,
-};
-
-static int __init rs_360_init(void)
-{
- struct serial_state * state;
- ser_info_t *info;
- void *mem_addr;
- uint dp_addr, iobits;
- int i, j, idx;
- ushort chan;
- QUICC_BD *bdp;
- volatile QUICC *cp;
- volatile struct smc_regs *sp;
- volatile struct smc_uart_pram *up;
- volatile struct scc_regs *scp;
- volatile struct uart_pram *sup;
- /* volatile immap_t *immap; */
-
- serial_driver = alloc_tty_driver(NR_PORTS);
- if (!serial_driver)
- return -1;
-
- show_serial_version();
-
- serial_driver->name = "ttyS";
- serial_driver->major = TTY_MAJOR;
- serial_driver->minor_start = 64;
- serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
- serial_driver->subtype = SERIAL_TYPE_NORMAL;
- serial_driver->init_termios = tty_std_termios;
- serial_driver->init_termios.c_cflag =
- baud_idx | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver->flags = TTY_DRIVER_REAL_RAW;
- tty_set_operations(serial_driver, &rs_360_ops);
-
- if (tty_register_driver(serial_driver))
- panic("Couldn't register serial driver\n");
-
- cp = pquicc; /* Get pointer to Communication Processor */
- /* immap = (immap_t *)IMAP_ADDR; */ /* and to internal registers */
-
-
- /* Configure SCC2, SCC3, and SCC4 instead of port A parallel I/O.
- */
- /* The "standard" configuration through the 860.
- */
-/* immap->im_ioport.iop_papar |= 0x00fc; */
-/* immap->im_ioport.iop_padir &= ~0x00fc; */
-/* immap->im_ioport.iop_paodr &= ~0x00fc; */
- cp->pio_papar |= 0x00fc;
- cp->pio_padir &= ~0x00fc;
- /* cp->pio_paodr &= ~0x00fc; */
-
-
- /* Since we don't yet do modem control, connect the port C pins
- * as general purpose I/O. This will assert CTS and CD for the
- * SCC ports.
- */
- /* FIXME: see 360um p.7-365 and 860um p.34-12
- * I can't make sense of these bits - mleslie*/
-/* immap->im_ioport.iop_pcdir |= 0x03c6; */
-/* immap->im_ioport.iop_pcpar &= ~0x03c6; */
-
-/* cp->pio_pcdir |= 0x03c6; */
-/* cp->pio_pcpar &= ~0x03c6; */
-
-
-
- /* Connect SCC2 and SCC3 to NMSI. Connect BRG3 to SCC2 and
- * BRG4 to SCC3.
- */
- cp->si_sicr &= ~0x00ffff00;
- cp->si_sicr |= 0x001b1200;
-
-#ifdef CONFIG_PP04
- /* Frequentis PP04 forced to RS-232 until we know better.
- * Port C 12 and 13 low enables RS-232 on SCC3 and SCC4.
- */
- immap->im_ioport.iop_pcdir |= 0x000c;
- immap->im_ioport.iop_pcpar &= ~0x000c;
- immap->im_ioport.iop_pcdat &= ~0x000c;
-
- /* This enables the TX driver.
- */
- cp->cp_pbpar &= ~0x6000;
- cp->cp_pbdat &= ~0x6000;
-#endif
-
- for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
- state->magic = SSTATE_MAGIC;
- state->line = i;
- state->type = PORT_UNKNOWN;
- state->custom_divisor = 0;
- state->close_delay = 5*HZ/10;
- state->closing_wait = 30*HZ;
- state->icount.cts = state->icount.dsr =
- state->icount.rng = state->icount.dcd = 0;
- state->icount.rx = state->icount.tx = 0;
- state->icount.frame = state->icount.parity = 0;
- state->icount.overrun = state->icount.brk = 0;
- printk(KERN_INFO "ttyS%d at irq 0x%02x is an %s\n",
- i, (unsigned int)(state->irq),
- (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC");
-
-#ifdef CONFIG_SERIAL_CONSOLE
- /* If we just printed the message on the console port, and
- * we are about to initialize it for general use, we have
- * to wait a couple of character times for the CR/NL to
- * make it out of the transmit buffer.
- */
- if (i == CONFIG_SERIAL_CONSOLE_PORT)
- mdelay(8);
-
-
-/* idx = PORT_NUM(info->state->smc_scc_num); */
-/* if (info->state->smc_scc_num & NUM_IS_SCC) */
-/* chan = scc_chan_map[idx]; */
-/* else */
-/* chan = smc_chan_map[idx]; */
-
-/* cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; */
-/* while (cp->cp_cr & CPM_CR_FLG); */
-
-#endif
- /* info = kmalloc(sizeof(ser_info_t), GFP_KERNEL); */
- info = &quicc_ser_info[i];
- if (info) {
- memset (info, 0, sizeof(ser_info_t));
- info->magic = SERIAL_MAGIC;
- info->line = i;
- info->flags = state->flags;
- INIT_WORK(&info->tqueue, do_softint, info);
- INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info);
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- info->state = state;
- state->info = (struct async_struct *)info;
-
- /* We need to allocate a transmit and receive buffer
- * descriptors from dual port ram, and a character
- * buffer area from host mem.
- */
- dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * RX_NUM_FIFO);
-
- /* Allocate space for FIFOs in the host memory.
- * (for now this is from a static array of buffers :(
- */
- /* mem_addr = m360_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE); */
- /* mem_addr = kmalloc (RX_NUM_FIFO * RX_BUF_SIZE, GFP_BUFFER); */
- mem_addr = &rx_buf_pool[i * RX_NUM_FIFO * RX_BUF_SIZE];
-
- /* Set the physical address of the host memory
- * buffers in the buffer descriptors, and the
- * virtual address for us to work with.
- */
- bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
- info->rx_cur = info->rx_bd_base = bdp;
-
- /* initialize rx buffer descriptors */
- for (j=0; j<(RX_NUM_FIFO-1); j++) {
- bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
- bdp->status = BD_SC_EMPTY | BD_SC_INTRPT;
- mem_addr += RX_BUF_SIZE;
- bdp++;
- }
- bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE];
- bdp->status = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT;
-
-
- idx = PORT_NUM(info->state->smc_scc_num);
- if (info->state->smc_scc_num & NUM_IS_SCC) {
-
-#if defined (CONFIG_UCQUICC) && 1
- /* set the transceiver mode to RS232 */
- sipex_mode_bits &= ~(uint)SIPEX_MODE(idx,0x0f); /* clear current mode */
- sipex_mode_bits |= (uint)SIPEX_MODE(idx,0x02);
- *(uint *)_periph_base = sipex_mode_bits;
- /* printk ("sipex bits = 0x%08x\n", sipex_mode_bits); */
-#endif
- }
-
- dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * TX_NUM_FIFO);
-
- /* Allocate space for FIFOs in the host memory.
- */
- /* mem_addr = m360_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE); */
- /* mem_addr = kmalloc (TX_NUM_FIFO * TX_BUF_SIZE, GFP_BUFFER); */
- mem_addr = &tx_buf_pool[i * TX_NUM_FIFO * TX_BUF_SIZE];
-
- /* Set the physical address of the host memory
- * buffers in the buffer descriptors, and the
- * virtual address for us to work with.
- */
- /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
- bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
- info->tx_cur = info->tx_bd_base = (QUICC_BD *)bdp;
-
- /* initialize tx buffer descriptors */
- for (j=0; j<(TX_NUM_FIFO-1); j++) {
- bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
- bdp->status = BD_SC_INTRPT;
- mem_addr += TX_BUF_SIZE;
- bdp++;
- }
- bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE];
- bdp->status = (BD_SC_WRAP | BD_SC_INTRPT);
-
- if (info->state->smc_scc_num & NUM_IS_SCC) {
- scp = &pquicc->scc_regs[idx];
- sup = &pquicc->pram[info->state->port].scc.pscc.u;
- sup->rbase = dp_addr;
- sup->tbase = dp_addr;
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- sup->rfcr = SMC_EB;
- sup->tfcr = SMC_EB;
-
- /* Set this to 1 for now, so we get single
- * character interrupts. Using idle character
- * time requires some additional tuning.
- */
- sup->mrblr = 1;
- sup->max_idl = 0;
- sup->brkcr = 1;
- sup->parec = 0;
- sup->frmer = 0;
- sup->nosec = 0;
- sup->brkec = 0;
- sup->uaddr1 = 0;
- sup->uaddr2 = 0;
- sup->toseq = 0;
- {
- int i;
- for (i=0;i<8;i++)
- sup->cc[i] = 0x8000;
- }
- sup->rccm = 0xc0ff;
-
- /* Send the CPM an initialize command.
- */
- chan = scc_chan_map[idx];
-
- /* execute the INIT RX & TX PARAMS command for this channel. */
- cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- scp->scc_gsmr.w.high = 0;
- scp->scc_gsmr.w.low =
- (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
-
- /* Disable all interrupts and clear all pending
- * events.
- */
- scp->scc_sccm = 0;
- scp->scc_scce = 0xffff;
- scp->scc_dsr = 0x7e7e;
- scp->scc_psmr = 0x3000;
-
- /* If the port is the console, enable Rx and Tx.
- */
-#ifdef CONFIG_SERIAL_CONSOLE
- if (i == CONFIG_SERIAL_CONSOLE_PORT)
- scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-#endif
- }
- else {
- /* Configure SMCs Tx/Rx instead of port B
- * parallel I/O.
- */
- up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u;
- up->rbase = dp_addr;
-
- iobits = 0xc0 << (idx * 4);
- cp->pip_pbpar |= iobits;
- cp->pip_pbdir &= ~iobits;
- cp->pip_pbodr &= ~iobits;
-
-
- /* Connect the baud rate generator to the
- * SMC based upon index in rs_table. Also
- * make sure it is connected to NMSI.
- */
- cp->si_simode &= ~(0xffff << (idx * 16));
- cp->si_simode |= (i << ((idx * 16) + 12));
-
- up->tbase = dp_addr;
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- up->rfcr = SMC_EB;
- up->tfcr = SMC_EB;
-
- /* Set this to 1 for now, so we get single
- * character interrupts. Using idle character
- * time requires some additional tuning.
- */
- up->mrblr = 1;
- up->max_idl = 0;
- up->brkcr = 1;
-
- /* Send the CPM an initialize command.
- */
- chan = smc_chan_map[idx];
-
- cp->cp_cr = mk_cr_cmd(chan,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
-#ifdef CONFIG_SERIAL_CONSOLE
- if (i == CONFIG_SERIAL_CONSOLE_PORT)
- printk("");
-#endif
- while (cp->cp_cr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- sp = &cp->smc_regs[idx];
- sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
-
- /* Disable all interrupts and clear all pending
- * events.
- */
- sp->smc_smcm = 0;
- sp->smc_smce = 0xff;
-
- /* If the port is the console, enable Rx and Tx.
- */
-#ifdef CONFIG_SERIAL_CONSOLE
- if (i == CONFIG_SERIAL_CONSOLE_PORT)
- sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
-#endif
- }
-
- /* Install interrupt handler.
- */
- /* cpm_install_handler(IRQ_MACHSPEC | state->irq, rs_360_interrupt, info); */
- /*request_irq(IRQ_MACHSPEC | state->irq, rs_360_interrupt, */
- request_irq(state->irq, rs_360_interrupt, 0, "ttyS",
- (void *)info);
-
- /* Set up the baud rate generator.
- */
- m360_cpm_setbrg(i, baud_table[baud_idx]);
-
- }
- }
-
- return 0;
-}
-module_init(rs_360_init);
-
-/* This must always be called before the rs_360_init() function, otherwise
- * it blows away the port control information.
- */
-//static int __init serial_console_setup( struct console *co, char *options)
-int serial_console_setup( struct console *co, char *options)
-{
- struct serial_state *ser;
- uint mem_addr, dp_addr, bidx, idx, iobits;
- ushort chan;
- QUICC_BD *bdp;
- volatile QUICC *cp;
- volatile struct smc_regs *sp;
- volatile struct scc_regs *scp;
- volatile struct smc_uart_pram *up;
- volatile struct uart_pram *sup;
-
-/* mleslie TODO:
- * add something to the 68k bootloader to store a desired initial console baud rate */
-
-/* bd_t *bd; */ /* a board info struct used by EPPC-bug */
-/* bd = (bd_t *)__res; */
-
- for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++)
- /* if (bd->bi_baudrate == baud_table[bidx]) */
- if (CONSOLE_BAUDRATE == baud_table[bidx])
- break;
-
- /* co->cflag = CREAD|CLOCAL|bidx|CS8; */
- baud_idx = bidx;
-
- ser = rs_table + CONFIG_SERIAL_CONSOLE_PORT;
-
- cp = pquicc; /* Get pointer to Communication Processor */
-
- idx = PORT_NUM(ser->smc_scc_num);
- if (ser->smc_scc_num & NUM_IS_SCC) {
-
- /* TODO: need to set up SCC pin assignment etc. here */
-
- }
- else {
- iobits = 0xc0 << (idx * 4);
- cp->pip_pbpar |= iobits;
- cp->pip_pbdir &= ~iobits;
- cp->pip_pbodr &= ~iobits;
-
- /* Connect the baud rate generator to the
- * SMC based upon index in rs_table. Also
- * make sure it is connected to NMSI.
- */
- cp->si_simode &= ~(0xffff << (idx * 16));
- cp->si_simode |= (idx << ((idx * 16) + 12));
- }
-
- /* When we get here, the CPM has been reset, so we need
- * to configure the port.
- * We need to allocate a transmit and receive buffer descriptor
- * from dual port ram, and a character buffer area from host mem.
- */
-
- /* Allocate space for two buffer descriptors in the DP ram.
- */
- dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * CONSOLE_NUM_FIFO);
-
- /* Allocate space for two 2 byte FIFOs in the host memory.
- */
- /* mem_addr = m360_cpm_hostalloc(8); */
- mem_addr = (uint)console_fifos;
-
-
- /* Set the physical address of the host memory buffers in
- * the buffer descriptors.
- */
- /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */
- bdp = (QUICC_BD *)((uint)pquicc + dp_addr);
- bdp->buf = (char *)mem_addr;
- (bdp+1)->buf = (char *)(mem_addr+4);
-
- /* For the receive, set empty and wrap.
- * For transmit, set wrap.
- */
- bdp->status = BD_SC_EMPTY | BD_SC_WRAP;
- (bdp+1)->status = BD_SC_WRAP;
-
- /* Set up the uart parameters in the parameter ram.
- */
- if (ser->smc_scc_num & NUM_IS_SCC) {
- scp = &cp->scc_regs[idx];
- /* sup = (scc_uart_t *)&cp->cp_dparam[ser->port]; */
- sup = &pquicc->pram[ser->port].scc.pscc.u;
-
- sup->rbase = dp_addr;
- sup->tbase = dp_addr + sizeof(QUICC_BD);
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- sup->rfcr = SMC_EB;
- sup->tfcr = SMC_EB;
-
- /* Set this to 1 for now, so we get single
- * character interrupts. Using idle character
- * time requires some additional tuning.
- */
- sup->mrblr = 1;
- sup->max_idl = 0;
- sup->brkcr = 1;
- sup->parec = 0;
- sup->frmer = 0;
- sup->nosec = 0;
- sup->brkec = 0;
- sup->uaddr1 = 0;
- sup->uaddr2 = 0;
- sup->toseq = 0;
- {
- int i;
- for (i=0;i<8;i++)
- sup->cc[i] = 0x8000;
- }
- sup->rccm = 0xc0ff;
-
- /* Send the CPM an initialize command.
- */
- chan = scc_chan_map[idx];
-
- cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- scp->scc_gsmr.w.high = 0;
- scp->scc_gsmr.w.low =
- (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
-
- /* Disable all interrupts and clear all pending
- * events.
- */
- scp->scc_sccm = 0;
- scp->scc_scce = 0xffff;
- scp->scc_dsr = 0x7e7e;
- scp->scc_psmr = 0x3000;
-
- scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- }
- else {
- /* up = (smc_uart_t *)&cp->cp_dparam[ser->port]; */
- up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u;
-
- up->rbase = dp_addr; /* Base of receive buffer desc. */
- up->tbase = dp_addr+sizeof(QUICC_BD); /* Base of xmt buffer desc. */
- up->rfcr = SMC_EB;
- up->tfcr = SMC_EB;
-
- /* Set this to 1 for now, so we get single character interrupts.
- */
- up->mrblr = 1; /* receive buffer length */
- up->max_idl = 0; /* wait forever for next char */
-
- /* Send the CPM an initialize command.
- */
- chan = smc_chan_map[idx];
- cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- sp = &cp->smc_regs[idx];
- sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
-
- /* And finally, enable Rx and Tx.
- */
- sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
- }
-
- /* Set up the baud rate generator.
- */
- /* m360_cpm_setbrg((ser - rs_table), bd->bi_baudrate); */
- m360_cpm_setbrg((ser - rs_table), CONSOLE_BAUDRATE);
-
- return 0;
-}
-
-/*
- * Local variables:
- * c-indent-level: 4
- * c-basic-offset: 4
- * tab-width: 4
- * End:
- */
git.openpandora.org / pandora-kernel.git / commitdiff