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@@ -1,2979 +0,0 @@
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-/*
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- * UART driver for 68360 CPM SCC or SMC
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- * Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>,
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- * Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca>
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- * Copyright (c) 1997 Dan Malek <dmalek@jlc.net>
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- *
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- * I used the serial.c driver as the framework for this driver.
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- * Give credit to those guys.
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- * The original code was written for the MBX860 board. I tried to make
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- * it generic, but there may be some assumptions in the structures that
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- * have to be fixed later.
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- * To save porting time, I did not bother to change any object names
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- * that are not accessed outside of this file.
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- * It still needs lots of work........When it was easy, I included code
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- * to support the SCCs, but this has never been tested, nor is it complete.
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- * Only the SCCs support modem control, so that is not complete either.
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- *
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- * This module exports the following rs232 io functions:
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- *
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- * int rs_360_init(void);
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- */
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-
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-#include <linux/module.h>
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-#include <linux/errno.h>
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-#include <linux/signal.h>
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-#include <linux/sched.h>
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-#include <linux/timer.h>
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-#include <linux/interrupt.h>
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-#include <linux/tty.h>
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-#include <linux/tty_flip.h>
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-#include <linux/serial.h>
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-#include <linux/serialP.h>
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-#include <linux/major.h>
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-#include <linux/string.h>
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-#include <linux/fcntl.h>
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-#include <linux/ptrace.h>
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-#include <linux/mm.h>
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-#include <linux/init.h>
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-#include <linux/delay.h>
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-#include <asm/irq.h>
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-#include <asm/m68360.h>
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-#include <asm/commproc.h>
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-
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-
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-#ifdef CONFIG_KGDB
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-extern void breakpoint(void);
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-extern void set_debug_traps(void);
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-extern int kgdb_output_string (const char* s, unsigned int count);
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-#endif
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-
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-
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-/* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */
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-#include <linux/console.h>
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-#include <linux/jiffies.h>
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-
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-/* this defines the index into rs_table for the port to use
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- */
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-#ifndef CONFIG_SERIAL_CONSOLE_PORT
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-#define CONFIG_SERIAL_CONSOLE_PORT 1 /* ie SMC2 - note USE_SMC2 must be defined */
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-#endif
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-/* #endif */
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-
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-#if 0
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-/* SCC2 for console
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- */
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-#undef CONFIG_SERIAL_CONSOLE_PORT
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-#define CONFIG_SERIAL_CONSOLE_PORT 2
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-#endif
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-
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-
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-#define TX_WAKEUP ASYNC_SHARE_IRQ
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-
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-static char *serial_name = "CPM UART driver";
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-static char *serial_version = "0.03";
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-
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-static struct tty_driver *serial_driver;
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-int serial_console_setup(struct console *co, char *options);
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-
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-/*
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- * Serial driver configuration section. Here are the various options:
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- */
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-#define SERIAL_PARANOIA_CHECK
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-#define CONFIG_SERIAL_NOPAUSE_IO
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-#define SERIAL_DO_RESTART
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-
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-/* Set of debugging defines */
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-
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-#undef SERIAL_DEBUG_INTR
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-#undef SERIAL_DEBUG_OPEN
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-#undef SERIAL_DEBUG_FLOW
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-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
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-
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-#define _INLINE_ inline
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-
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-#define DBG_CNT(s)
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-
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-/* We overload some of the items in the data structure to meet our
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- * needs. For example, the port address is the CPM parameter ram
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- * offset for the SCC or SMC. The maximum number of ports is 4 SCCs and
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- * 2 SMCs. The "hub6" field is used to indicate the channel number, with
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- * a flag indicating SCC or SMC, and the number is used as an index into
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- * the CPM parameter area for this device.
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- * The "type" field is currently set to 0, for PORT_UNKNOWN. It is
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- * not currently used. I should probably use it to indicate the port
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- * type of SMC or SCC.
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- * The SMCs do not support any modem control signals.
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- */
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-#define smc_scc_num hub6
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-#define NUM_IS_SCC ((int)0x00010000)
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-#define PORT_NUM(P) ((P) & 0x0000ffff)
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-
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-
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-#if defined (CONFIG_UCQUICC)
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-
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-volatile extern void *_periph_base;
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-/* sipex transceiver
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- * mode bits for are on pins
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- *
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- * SCC2 d16..19
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- * SCC3 d20..23
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- * SCC4 d24..27
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- */
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-#define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1)))
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-
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-static uint sipex_mode_bits = 0x00000000;
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-
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-#endif
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-
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-/* There is no `serial_state' defined back here in 2.0.
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- * Try to get by with serial_struct
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- */
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-/* #define serial_state serial_struct */
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-
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-/* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few
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- * extras: */
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-
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-#if 0
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-struct async_icount_24 {
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- __u32 cts, dsr, rng, dcd, tx, rx;
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- __u32 frame, parity, overrun, brk;
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- __u32 buf_overrun;
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-} icount;
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-#endif
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-
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-#if 0
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-
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-struct serial_state {
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- int magic;
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- int baud_base;
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- unsigned long port;
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- int irq;
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- int flags;
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- int hub6;
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- int type;
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- int line;
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- int revision; /* Chip revision (950) */
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- int xmit_fifo_size;
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- int custom_divisor;
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- int count;
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- u8 *iomem_base;
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- u16 iomem_reg_shift;
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- unsigned short close_delay;
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- unsigned short closing_wait; /* time to wait before closing */
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- struct async_icount_24 icount;
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- int io_type;
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- struct async_struct *info;
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-};
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-#endif
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-
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-#define SSTATE_MAGIC 0x5302
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-
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-
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-
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-/* SMC2 is sometimes used for low performance TDM interfaces. Define
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- * this as 1 if you want SMC2 as a serial port UART managed by this driver.
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- * Define this as 0 if you wish to use SMC2 for something else.
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- */
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-#define USE_SMC2 1
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-
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-#if 0
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-/* Define SCC to ttySx mapping. */
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-#define SCC_NUM_BASE (USE_SMC2 + 1) /* SCC base tty "number" */
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-
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-/* Define which SCC is the first one to use for a serial port. These
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- * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
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- * for Ethernet, and the first available SCC for serial UART is SCC2.
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- * NOTE: IF YOU CHANGE THIS, you have to change the PROFF_xxx and
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- * interrupt vectors in the table below to match.
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- */
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-#define SCC_IDX_BASE 1 /* table index */
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-#endif
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-
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-
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-/* Processors other than the 860 only get SMCs configured by default.
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- * Either they don't have SCCs or they are allocated somewhere else.
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- * Of course, there are now 860s without some SCCs, so we will need to
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- * address that someday.
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- * The Embedded Planet Multimedia I/O cards use TDM interfaces to the
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- * stereo codec parts, and we use SMC2 to help support that.
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- */
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-static struct serial_state rs_table[] = {
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-/* type line PORT IRQ FLAGS smc_scc_num (F.K.A. hub6) */
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- { 0, 0, PRSLOT_SMC1, CPMVEC_SMC1, 0, 0 } /* SMC1 ttyS0 */
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-#if USE_SMC2
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- ,{ 0, 0, PRSLOT_SMC2, CPMVEC_SMC2, 0, 1 } /* SMC2 ttyS1 */
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-#endif
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-
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-#if defined(CONFIG_SERIAL_68360_SCC)
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- ,{ 0, 0, PRSLOT_SCC2, CPMVEC_SCC2, 0, (NUM_IS_SCC | 1) } /* SCC2 ttyS2 */
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- ,{ 0, 0, PRSLOT_SCC3, CPMVEC_SCC3, 0, (NUM_IS_SCC | 2) } /* SCC3 ttyS3 */
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- ,{ 0, 0, PRSLOT_SCC4, CPMVEC_SCC4, 0, (NUM_IS_SCC | 3) } /* SCC4 ttyS4 */
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-#endif
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-};
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-
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-#define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state))
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-
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-/* The number of buffer descriptors and their sizes.
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- */
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-#define RX_NUM_FIFO 4
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-#define RX_BUF_SIZE 32
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-#define TX_NUM_FIFO 4
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-#define TX_BUF_SIZE 32
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-
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-#define CONSOLE_NUM_FIFO 2
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-#define CONSOLE_BUF_SIZE 4
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-
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-char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE];
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-
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-/* The async_struct in serial.h does not really give us what we
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- * need, so define our own here.
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- */
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-typedef struct serial_info {
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- int magic;
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- int flags;
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-
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- struct serial_state *state;
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- /* struct serial_struct *state; */
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- /* struct async_struct *state; */
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-
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- struct tty_struct *tty;
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- int read_status_mask;
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- int ignore_status_mask;
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- int timeout;
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- int line;
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- int x_char; /* xon/xoff character */
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- int close_delay;
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- unsigned short closing_wait;
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- unsigned short closing_wait2;
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- unsigned long event;
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- unsigned long last_active;
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- int blocked_open; /* # of blocked opens */
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- struct work_struct tqueue;
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- struct work_struct tqueue_hangup;
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- wait_queue_head_t open_wait;
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- wait_queue_head_t close_wait;
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-
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-
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-/* CPM Buffer Descriptor pointers.
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- */
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- QUICC_BD *rx_bd_base;
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- QUICC_BD *rx_cur;
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- QUICC_BD *tx_bd_base;
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- QUICC_BD *tx_cur;
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-} ser_info_t;
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-
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-
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-/* since kmalloc_init() does not get called until much after this initialization: */
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-static ser_info_t quicc_ser_info[NR_PORTS];
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-static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE];
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-static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE];
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-
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-static void change_speed(ser_info_t *info);
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-static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout);
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-
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-static inline int serial_paranoia_check(ser_info_t *info,
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- char *name, const char *routine)
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-{
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-#ifdef SERIAL_PARANOIA_CHECK
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- static const char *badmagic =
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- "Warning: bad magic number for serial struct (%s) in %s\n";
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- static const char *badinfo =
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- "Warning: null async_struct for (%s) in %s\n";
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-
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- if (!info) {
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- printk(badinfo, name, routine);
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- return 1;
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- }
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- if (info->magic != SERIAL_MAGIC) {
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- printk(badmagic, name, routine);
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- return 1;
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- }
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-#endif
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- return 0;
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-}
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-
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-/*
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- * This is used to figure out the divisor speeds and the timeouts,
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- * indexed by the termio value. The generic CPM functions are responsible
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- * for setting and assigning baud rate generators for us.
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- */
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-static int baud_table[] = {
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- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
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- 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
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-
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-/* This sucks. There is a better way: */
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-#if defined(CONFIG_CONSOLE_9600)
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- #define CONSOLE_BAUDRATE 9600
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-#elif defined(CONFIG_CONSOLE_19200)
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- #define CONSOLE_BAUDRATE 19200
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-#elif defined(CONFIG_CONSOLE_115200)
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- #define CONSOLE_BAUDRATE 115200
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-#else
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- #warning "console baud rate undefined"
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- #define CONSOLE_BAUDRATE 9600
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-#endif
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-
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-/*
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- * ------------------------------------------------------------
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- * rs_stop() and rs_start()
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- *
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- * This routines are called before setting or resetting tty->stopped.
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- * They enable or disable transmitter interrupts, as necessary.
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- * ------------------------------------------------------------
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- */
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-static void rs_360_stop(struct tty_struct *tty)
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-{
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- ser_info_t *info = (ser_info_t *)tty->driver_data;
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- int idx;
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- unsigned long flags;
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- volatile struct scc_regs *sccp;
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- volatile struct smc_regs *smcp;
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-
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- if (serial_paranoia_check(info, tty->name, "rs_stop"))
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- return;
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-
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- local_irq_save(flags);
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- idx = PORT_NUM(info->state->smc_scc_num);
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- if (info->state->smc_scc_num & NUM_IS_SCC) {
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- sccp = &pquicc->scc_regs[idx];
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- sccp->scc_sccm &= ~UART_SCCM_TX;
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- } else {
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- /* smcp = &cpmp->cp_smc[idx]; */
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- smcp = &pquicc->smc_regs[idx];
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- smcp->smc_smcm &= ~SMCM_TX;
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- }
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- local_irq_restore(flags);
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-}
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-
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-
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-static void rs_360_start(struct tty_struct *tty)
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-{
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- ser_info_t *info = (ser_info_t *)tty->driver_data;
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- int idx;
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- unsigned long flags;
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- volatile struct scc_regs *sccp;
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- volatile struct smc_regs *smcp;
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-
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- if (serial_paranoia_check(info, tty->name, "rs_stop"))
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- return;
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-
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- local_irq_save(flags);
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- idx = PORT_NUM(info->state->smc_scc_num);
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- if (info->state->smc_scc_num & NUM_IS_SCC) {
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- sccp = &pquicc->scc_regs[idx];
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- sccp->scc_sccm |= UART_SCCM_TX;
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- } else {
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- smcp = &pquicc->smc_regs[idx];
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- smcp->smc_smcm |= SMCM_TX;
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- }
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- local_irq_restore(flags);
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-}
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-
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-/*
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- * ----------------------------------------------------------------------
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- *
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- * Here starts the interrupt handling routines. All of the following
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- * subroutines are declared as inline and are folded into
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- * rs_interrupt(). They were separated out for readability's sake.
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- *
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- * Note: rs_interrupt() is a "fast" interrupt, which means that it
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- * runs with interrupts turned off. People who may want to modify
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- * rs_interrupt() should try to keep the interrupt handler as fast as
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- * possible. After you are done making modifications, it is not a bad
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- * idea to do:
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- *
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- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
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- *
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- * and look at the resulting assemble code in serial.s.
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- *
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- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
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- * -----------------------------------------------------------------------
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- */
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-
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-static _INLINE_ void receive_chars(ser_info_t *info)
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-{
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- 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:
|
|
|
- */
|