diff options
Diffstat (limited to 'drivers/tty/serial')
53 files changed, 795 insertions, 3441 deletions
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c index e0a77540b8c..a88ef9782a4 100644 --- a/drivers/tty/serial/68328serial.c +++ b/drivers/tty/serial/68328serial.c @@ -235,22 +235,6 @@ static void batten_down_hatches(void) static void status_handle(struct m68k_serial *info, unsigned short status) { -#if 0 - if(status & DCD) { - if((info->port.tty->termios->c_cflag & CRTSCTS) && - ((info->curregs[3] & AUTO_ENAB)==0)) { - info->curregs[3] |= AUTO_ENAB; - info->pendregs[3] |= AUTO_ENAB; - write_zsreg(info->m68k_channel, 3, info->curregs[3]); - } - } else { - if((info->curregs[3] & AUTO_ENAB)) { - info->curregs[3] &= ~AUTO_ENAB; - info->pendregs[3] &= ~AUTO_ENAB; - write_zsreg(info->m68k_channel, 3, info->curregs[3]); - } - } -#endif /* If this is console input and this is a * 'break asserted' status change interrupt * see if we can drop into the debugger @@ -340,9 +324,6 @@ static void transmit_chars(struct m68k_serial *info) info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); info->xmit_cnt--; - if (info->xmit_cnt < WAKEUP_CHARS) - schedule_work(&info->tqueue); - if(info->xmit_cnt <= 0) { /* All done for now... TX ints off */ uart->ustcnt &= ~USTCNT_TX_INTR_MASK; @@ -378,21 +359,6 @@ irqreturn_t rs_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } -static void do_softint(struct work_struct *work) -{ - struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue); - struct tty_struct *tty; - - tty = info->tty; - if (!tty) - return; -#if 0 - if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) { - tty_wakeup(tty); - } -#endif -} - static int startup(struct m68k_serial * info) { m68328_uart *uart = &uart_addr[info->line]; @@ -1324,7 +1290,6 @@ rs68328_init(void) info->event = 0; info->count = 0; info->blocked_open = 0; - INIT_WORK(&info->tqueue, do_softint); init_waitqueue_head(&info->open_wait); init_waitqueue_head(&info->close_wait); info->line = i; @@ -1341,7 +1306,7 @@ rs68328_init(void) if (request_irq(uart_irqs[i], rs_interrupt, - IRQF_DISABLED, + 0, "M68328_UART", info)) panic("Unable to attach 68328 serial interrupt\n"); } diff --git a/drivers/tty/serial/68328serial.h b/drivers/tty/serial/68328serial.h index 8c9c3c0745d..3d2faabd766 100644 --- a/drivers/tty/serial/68328serial.h +++ b/drivers/tty/serial/68328serial.h @@ -158,7 +158,6 @@ struct m68k_serial { int xmit_head; int xmit_tail; int xmit_cnt; - struct work_struct tqueue; wait_queue_head_t open_wait; wait_queue_head_t close_wait; }; diff --git a/drivers/tty/serial/68360serial.c b/drivers/tty/serial/68360serial.c deleted file mode 100644 index 0a3e8787ed5..00000000000 --- a/drivers/tty/serial/68360serial.c +++ /dev/null @@ -1,2979 +0,0 @@ -/* - * 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 |