arch/m68k/q40/config.c - linux - Git at Google

 /*
  *  arch/m68k/q40/config.c
  *
  *  Copyright (C) 1999 Richard Zidlicky
  *
  * originally based on:
  *
  *  linux/bvme/config.c
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file README.legal in the main directory of this archive
  * for more details.
  */

 #include <linux/config.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/tty.h>
 #include <linux/console.h>
 #include <linux/linkage.h>
 #include <linux/init.h>
 #include <linux/major.h>
 #include <linux/serial_reg.h>
 #include <linux/rtc.h>
 #include <linux/vt_kern.h>

 #include <asm/io.h>
 #include <asm/rtc.h>
 #include <asm/bootinfo.h>
 #include <asm/system.h>
 #include <asm/pgtable.h>
 #include <asm/setup.h>
 #include <asm/irq.h>
 #include <asm/traps.h>
 #include <asm/machdep.h>
 #include <asm/q40_master.h>

 extern void floppy_setup(char *str, int *ints);

 extern irqreturn_t q40_process_int (int level, struct pt_regs *regs);
 extern irqreturn_t (*q40_default_handler[]) (int, void *, struct pt_regs *);  /* added just for debugging */
 extern void q40_init_IRQ (void);
 extern void q40_free_irq (unsigned int, void *);
 extern int  show_q40_interrupts (struct seq_file *, void *);
 extern void q40_enable_irq (unsigned int);
 extern void q40_disable_irq (unsigned int);
 static void q40_get_model(char *model);
 static int  q40_get_hardware_list(char *buffer);
 extern int  q40_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
 extern void q40_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));

 extern unsigned long q40_gettimeoffset (void);
 extern int q40_hwclk (int, struct rtc_time *);
 extern unsigned int q40_get_ss (void);
 extern int q40_set_clock_mmss (unsigned long);
 static int q40_get_rtc_pll(struct rtc_pll_info *pll);
 static int q40_set_rtc_pll(struct rtc_pll_info *pll);
 extern void q40_reset (void);
 void q40_halt(void);
 extern void q40_waitbut(void);
 void q40_set_vectors (void);

 extern void q40_mksound(unsigned int /*freq*/, unsigned int /*ticks*/ );

 extern char m68k_debug_device[];
 static void q40_mem_console_write(struct console *co, const char *b,
 				    unsigned int count);

 extern int ql_ticks;

 static struct console q40_console_driver = {
 	.name =		"debug",
 	.flags =	CON_PRINTBUFFER,
 	.index =	-1,
 };


 /* early debugging function:*/
 extern char *q40_mem_cptr; /*=(char *)0xff020000;*/
 static int _cpleft;

 static void q40_mem_console_write(struct console *co, const char *s,
 				  unsigned int count)
 {
   char *p=(char *)s;

   if (count<_cpleft)
     while (count-- >0){
       *q40_mem_cptr=*p++;
       q40_mem_cptr+=4;
       _cpleft--;
     }
 }
 #if 0
 void printq40(char *str)
 {
   int l=strlen(str);
   char *p=q40_mem_cptr;

   while (l-- >0 && _cpleft-- >0)
     {
       *p=*str++;
       p+=4;
     }
   q40_mem_cptr=p;
 }
 #endif

 static int halted=0;

 #ifdef CONFIG_HEARTBEAT
 static void q40_heartbeat(int on)
 {
   if (halted) return;

   if (on)
     Q40_LED_ON();
   else
     Q40_LED_OFF();
 }
 #endif

 void q40_reset(void)
 {
         halted=1;
         printk ("\n\n*******************************************\n"
 		"Called q40_reset : press the RESET button!! \n"
 		"*******************************************\n");
 	Q40_LED_ON();
 	while(1) ;
 }
 void q40_halt(void)
 {
         halted=1;
         printk ("\n\n*******************\n"
 		    "  Called q40_halt\n"
 		    "*******************\n");
 	Q40_LED_ON();
 	while(1) ;
 }

 static void q40_get_model(char *model)
 {
     sprintf(model, "Q40");
 }

 /* No hardware options on Q40? */

 static int q40_get_hardware_list(char *buffer)
 {
     *buffer = '\0';
     return 0;
 }

 static unsigned int serports[]={0x3f8,0x2f8,0x3e8,0x2e8,0};
 void q40_disable_irqs(void)
 {
   unsigned i,j;

   j=0;
   while((i=serports[j++])) outb(0,i+UART_IER);
   master_outb(0,EXT_ENABLE_REG);
   master_outb(0,KEY_IRQ_ENABLE_REG);
 }

 void __init config_q40(void)
 {
     mach_sched_init      = q40_sched_init;

     mach_init_IRQ        = q40_init_IRQ;
     mach_gettimeoffset   = q40_gettimeoffset;
     mach_hwclk           = q40_hwclk;
     mach_get_ss          = q40_get_ss;
     mach_get_rtc_pll     = q40_get_rtc_pll;
     mach_set_rtc_pll     = q40_set_rtc_pll;
     mach_set_clock_mmss	 = q40_set_clock_mmss;

     mach_reset		 = q40_reset;
     mach_free_irq	 = q40_free_irq;
     mach_process_int	 = q40_process_int;
     mach_get_irq_list	 = show_q40_interrupts;
     mach_request_irq	 = q40_request_irq;
     enable_irq		 = q40_enable_irq;
     disable_irq          = q40_disable_irq;
     mach_default_handler = &q40_default_handler;
     mach_get_model       = q40_get_model;
     mach_get_hardware_list = q40_get_hardware_list;

 #if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
     mach_beep            = q40_mksound;
 #endif
 #ifdef CONFIG_HEARTBEAT
     mach_heartbeat = q40_heartbeat;
 #endif
     mach_halt = q40_halt;

     /* disable a few things that SMSQ might have left enabled */
     q40_disable_irqs();

     /* no DMA at all, but ide-scsi requires it.. make sure
      * all physical RAM fits into the boundary - otherwise
      * allocator may play costly and useless tricks */
     mach_max_dma_address = 1024*1024*1024;

     /* useful for early debugging stages - writes kernel messages into SRAM */
     if (!strncmp( m68k_debug_device,"mem",3 ))
       {
 	/*printk("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);*/
 	_cpleft=2000-((long)q40_mem_cptr-0xff020000)/4;
 	q40_console_driver.write = q40_mem_console_write;
 	register_console(&q40_console_driver);
       }
 }


 int q40_parse_bootinfo(const struct bi_record *rec)
 {
   return 1;
 }


 static inline unsigned char bcd2bin (unsigned char b)
 {
 	return ((b>>4)*10 + (b&15));
 }

 static inline unsigned char bin2bcd (unsigned char b)
 {
 	return (((b/10)*16) + (b%10));
 }


 unsigned long q40_gettimeoffset (void)
 {
     return 5000*(ql_ticks!=0);
 }


 /*
  * Looks like op is non-zero for setting the clock, and zero for
  * reading the clock.
  *
  *  struct hwclk_time {
  *         unsigned        sec;       0..59
  *         unsigned        min;       0..59
  *         unsigned        hour;      0..23
  *         unsigned        day;       1..31
  *         unsigned        mon;       0..11
  *         unsigned        year;      00...
  *         int             wday;      0..6, 0 is Sunday, -1 means unknown/don't set
  * };
  */

 int q40_hwclk(int op, struct rtc_time *t)
 {
         if (op)
 	{	/* Write.... */
 	        Q40_RTC_CTRL |= Q40_RTC_WRITE;

 		Q40_RTC_SECS = bin2bcd(t->tm_sec);
 		Q40_RTC_MINS = bin2bcd(t->tm_min);
 		Q40_RTC_HOUR = bin2bcd(t->tm_hour);
 		Q40_RTC_DATE = bin2bcd(t->tm_mday);
 		Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
 		Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
 		if (t->tm_wday >= 0)
 			Q40_RTC_DOW = bin2bcd(t->tm_wday+1);

 	        Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
 	}
 	else
 	{	/* Read....  */
 	  Q40_RTC_CTRL |= Q40_RTC_READ;

 	  t->tm_year = bcd2bin (Q40_RTC_YEAR);
 	  t->tm_mon  = bcd2bin (Q40_RTC_MNTH)-1;
 	  t->tm_mday = bcd2bin (Q40_RTC_DATE);
 	  t->tm_hour = bcd2bin (Q40_RTC_HOUR);
 	  t->tm_min  = bcd2bin (Q40_RTC_MINS);
 	  t->tm_sec  = bcd2bin (Q40_RTC_SECS);

 	  Q40_RTC_CTRL &= ~(Q40_RTC_READ);

 	  if (t->tm_year < 70)
 	    t->tm_year += 100;
 	  t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;

 	}

 	return 0;
 }

 unsigned int q40_get_ss(void)
 {
 	return bcd2bin(Q40_RTC_SECS);
 }

 /*
  * Set the minutes and seconds from seconds value 'nowtime'.  Fail if
  * clock is out by > 30 minutes.  Logic lifted from atari code.
  */

 int q40_set_clock_mmss (unsigned long nowtime)
 {
 	int retval = 0;
 	short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;

 	int rtc_minutes;


 	rtc_minutes = bcd2bin (Q40_RTC_MINS);

 	if ((rtc_minutes < real_minutes
 		? real_minutes - rtc_minutes
 			: rtc_minutes - real_minutes) < 30)
 	{
 	        Q40_RTC_CTRL |= Q40_RTC_WRITE;
 		Q40_RTC_MINS = bin2bcd(real_minutes);
 		Q40_RTC_SECS = bin2bcd(real_seconds);
 		Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
 	}
 	else
 		retval = -1;


 	return retval;
 }


 /* get and set PLL calibration of RTC clock */
 #define Q40_RTC_PLL_MASK ((1<<5)-1)
 #define Q40_RTC_PLL_SIGN (1<<5)

 static int q40_get_rtc_pll(struct rtc_pll_info *pll)
 {
 	int tmp=Q40_RTC_CTRL;
 	pll->pll_value = tmp & Q40_RTC_PLL_MASK;
 	if (tmp & Q40_RTC_PLL_SIGN)
 		pll->pll_value = -pll->pll_value;
 	pll->pll_max=31;
 	pll->pll_min=-31;
 	pll->pll_posmult=512;
 	pll->pll_negmult=256;
 	pll->pll_clock=125829120;
 	return 0;
 }

 static int q40_set_rtc_pll(struct rtc_pll_info *pll)
 {
 	if (!pll->pll_ctrl){
 		/* the docs are a bit unclear so I am doublesetting */
 		/* RTC_WRITE here ... */
 		int tmp = (pll->pll_value & 31) | (pll->pll_value<0 ? 32 : 0) |
 			  Q40_RTC_WRITE;
 		Q40_RTC_CTRL |= Q40_RTC_WRITE;
 		Q40_RTC_CTRL = tmp;
 		Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
 		return 0;
 	} else
 		return -EINVAL;
 }
	/*
	* arch/m68k/q40/config.c
	*
	* Copyright (C) 1999 Richard Zidlicky
	*
	* originally based on:
	*
	* linux/bvme/config.c
	*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file README.legal in the main directory of this archive
	* for more details.
	*/

	#include <linux/config.h>
	#include <linux/types.h>
	#include <linux/kernel.h>
	#include <linux/mm.h>
	#include <linux/tty.h>
	#include <linux/console.h>
	#include <linux/linkage.h>
	#include <linux/init.h>
	#include <linux/major.h>
	#include <linux/serial_reg.h>
	#include <linux/rtc.h>
	#include <linux/vt_kern.h>

	#include <asm/io.h>
	#include <asm/rtc.h>
	#include <asm/bootinfo.h>
	#include <asm/system.h>
	#include <asm/pgtable.h>
	#include <asm/setup.h>
	#include <asm/irq.h>
	#include <asm/traps.h>
	#include <asm/machdep.h>
	#include <asm/q40_master.h>

	extern void floppy_setup(char str, int ints);

	extern irqreturn_t q40_process_int (int level, struct pt_regs *regs);
	extern irqreturn_t (q40_default_handler[]) (int, void , struct pt_regs ); / added just for debugging */
	extern void q40_init_IRQ (void);
	extern void q40_free_irq (unsigned int, void *);
	extern int show_q40_interrupts (struct seq_file , void );
	extern void q40_enable_irq (unsigned int);
	extern void q40_disable_irq (unsigned int);
	static void q40_get_model(char *model);
	static int q40_get_hardware_list(char *buffer);
	extern int q40_request_irq(unsigned int irq, irqreturn_t (handler)(int, void , struct pt_regs ), unsigned long flags, const char devname, void *dev_id);
	extern void q40_sched_init(irqreturn_t (handler)(int, void , struct pt_regs *));

	extern unsigned long q40_gettimeoffset (void);
	extern int q40_hwclk (int, struct rtc_time *);
	extern unsigned int q40_get_ss (void);
	extern int q40_set_clock_mmss (unsigned long);
	static int q40_get_rtc_pll(struct rtc_pll_info *pll);
	static int q40_set_rtc_pll(struct rtc_pll_info *pll);
	extern void q40_reset (void);
	void q40_halt(void);
	extern void q40_waitbut(void);
	void q40_set_vectors (void);

	extern void q40_mksound(unsigned int /freq/, unsigned int /ticks/ );

	extern char m68k_debug_device[];
	static void q40_mem_console_write(struct console co, const char b,
	unsigned int count);

	extern int ql_ticks;

	static struct console q40_console_driver = {
	.name = "debug",
	.flags = CON_PRINTBUFFER,
	.index = -1,
	};


	/* early debugging function:*/
	extern char q40_mem_cptr; /=(char )0xff020000;/
	static int _cpleft;

	static void q40_mem_console_write(struct console co, const char s,
	unsigned int count)
	{
	char p=(char )s;

	if (count<_cpleft)
	while (count-- >0){
	q40_mem_cptr=p++;
	q40_mem_cptr+=4;
	_cpleft--;
	}
	}
	#if 0
	void printq40(char *str)
	{
	int l=strlen(str);
	char *p=q40_mem_cptr;

	while (l-- >0 && _cpleft-- >0)
	{
	p=str++;
	p+=4;
	}
	q40_mem_cptr=p;
	}
	#endif

	static int halted=0;

	#ifdef CONFIG_HEARTBEAT
	static void q40_heartbeat(int on)
	{
	if (halted) return;

	if (on)
	Q40_LED_ON();
	else
	Q40_LED_OFF();
	}
	#endif

	void q40_reset(void)
	{
	halted=1;
	printk ("\n\n*******************************************\n"
	"Called q40_reset : press the RESET button!! \n"
	"*******************************************\n");
	Q40_LED_ON();
	while(1) ;
	}
	void q40_halt(void)
	{
	halted=1;
	printk ("\n\n*******************\n"
	" Called q40_halt\n"
	"*******************\n");
	Q40_LED_ON();
	while(1) ;
	}

	static void q40_get_model(char *model)
	{
	sprintf(model, "Q40");
	}

	/* No hardware options on Q40? */

	static int q40_get_hardware_list(char *buffer)
	{
	*buffer = '\0';
	return 0;
	}

	static unsigned int serports[]={0x3f8,0x2f8,0x3e8,0x2e8,0};
	void q40_disable_irqs(void)
	{
	unsigned i,j;

	j=0;
	while((i=serports[j++])) outb(0,i+UART_IER);
	master_outb(0,EXT_ENABLE_REG);
	master_outb(0,KEY_IRQ_ENABLE_REG);
	}

	void __init config_q40(void)
	{
	mach_sched_init = q40_sched_init;

	mach_init_IRQ = q40_init_IRQ;
	mach_gettimeoffset = q40_gettimeoffset;
	mach_hwclk = q40_hwclk;
	mach_get_ss = q40_get_ss;
	mach_get_rtc_pll = q40_get_rtc_pll;
	mach_set_rtc_pll = q40_set_rtc_pll;
	mach_set_clock_mmss = q40_set_clock_mmss;

	mach_reset = q40_reset;
	mach_free_irq = q40_free_irq;
	mach_process_int = q40_process_int;
	mach_get_irq_list = show_q40_interrupts;
	mach_request_irq = q40_request_irq;
	enable_irq = q40_enable_irq;
	disable_irq = q40_disable_irq;
	mach_default_handler = &q40_default_handler;
	mach_get_model = q40_get_model;
	mach_get_hardware_list = q40_get_hardware_list;

	#if defined(CONFIG_INPUT_M68K_BEEP) \|\| defined(CONFIG_INPUT_M68K_BEEP_MODULE)
	mach_beep = q40_mksound;
	#endif
	#ifdef CONFIG_HEARTBEAT
	mach_heartbeat = q40_heartbeat;
	#endif
	mach_halt = q40_halt;

	/* disable a few things that SMSQ might have left enabled */
	q40_disable_irqs();

	/* no DMA at all, but ide-scsi requires it.. make sure
	* all physical RAM fits into the boundary - otherwise
	* allocator may play costly and useless tricks */
	mach_max_dma_address = 102410241024;

	/* useful for early debugging stages - writes kernel messages into SRAM */
	if (!strncmp( m68k_debug_device,"mem",3 ))
	{
	/printk("using NVRAM debug, q40_mem_cptr=%p\n",q40_mem_cptr);/
	_cpleft=2000-((long)q40_mem_cptr-0xff020000)/4;
	q40_console_driver.write = q40_mem_console_write;
	register_console(&q40_console_driver);
	}
	}


	int q40_parse_bootinfo(const struct bi_record *rec)
	{
	return 1;
	}


	static inline unsigned char bcd2bin (unsigned char b)
	{
	return ((b>>4)*10 + (b&15));
	}

	static inline unsigned char bin2bcd (unsigned char b)
	{
	return (((b/10)*16) + (b%10));
	}


	unsigned long q40_gettimeoffset (void)
	{
	return 5000*(ql_ticks!=0);
	}


	/*
	* Looks like op is non-zero for setting the clock, and zero for
	* reading the clock.
	*
	* struct hwclk_time {
	* unsigned sec; 0..59
	* unsigned min; 0..59
	* unsigned hour; 0..23
	* unsigned day; 1..31
	* unsigned mon; 0..11
	* unsigned year; 00...
	* int wday; 0..6, 0 is Sunday, -1 means unknown/don't set
	* };
	*/

	int q40_hwclk(int op, struct rtc_time *t)
	{
	if (op)
	{ /* Write.... */
	Q40_RTC_CTRL \|= Q40_RTC_WRITE;

	Q40_RTC_SECS = bin2bcd(t->tm_sec);
	Q40_RTC_MINS = bin2bcd(t->tm_min);
	Q40_RTC_HOUR = bin2bcd(t->tm_hour);
	Q40_RTC_DATE = bin2bcd(t->tm_mday);
	Q40_RTC_MNTH = bin2bcd(t->tm_mon + 1);
	Q40_RTC_YEAR = bin2bcd(t->tm_year%100);
	if (t->tm_wday >= 0)
	Q40_RTC_DOW = bin2bcd(t->tm_wday+1);

	Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
	}
	else
	{ /* Read.... */
	Q40_RTC_CTRL \|= Q40_RTC_READ;

	t->tm_year = bcd2bin (Q40_RTC_YEAR);
	t->tm_mon = bcd2bin (Q40_RTC_MNTH)-1;
	t->tm_mday = bcd2bin (Q40_RTC_DATE);
	t->tm_hour = bcd2bin (Q40_RTC_HOUR);
	t->tm_min = bcd2bin (Q40_RTC_MINS);
	t->tm_sec = bcd2bin (Q40_RTC_SECS);

	Q40_RTC_CTRL &= ~(Q40_RTC_READ);

	if (t->tm_year < 70)
	t->tm_year += 100;
	t->tm_wday = bcd2bin(Q40_RTC_DOW)-1;

	}

	return 0;
	}

	unsigned int q40_get_ss(void)
	{
	return bcd2bin(Q40_RTC_SECS);
	}

	/*
	* Set the minutes and seconds from seconds value 'nowtime'. Fail if
	* clock is out by > 30 minutes. Logic lifted from atari code.
	*/

	int q40_set_clock_mmss (unsigned long nowtime)
	{
	int retval = 0;
	short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;

	int rtc_minutes;


	rtc_minutes = bcd2bin (Q40_RTC_MINS);

	if ((rtc_minutes < real_minutes
	? real_minutes - rtc_minutes
	: rtc_minutes - real_minutes) < 30)
	{
	Q40_RTC_CTRL \|= Q40_RTC_WRITE;
	Q40_RTC_MINS = bin2bcd(real_minutes);
	Q40_RTC_SECS = bin2bcd(real_seconds);
	Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
	}
	else
	retval = -1;


	return retval;
	}


	/* get and set PLL calibration of RTC clock */
	#define Q40_RTC_PLL_MASK ((1<<5)-1)
	#define Q40_RTC_PLL_SIGN (1<<5)

	static int q40_get_rtc_pll(struct rtc_pll_info *pll)
	{
	int tmp=Q40_RTC_CTRL;
	pll->pll_value = tmp & Q40_RTC_PLL_MASK;
	if (tmp & Q40_RTC_PLL_SIGN)
	pll->pll_value = -pll->pll_value;
	pll->pll_max=31;
	pll->pll_min=-31;
	pll->pll_posmult=512;
	pll->pll_negmult=256;
	pll->pll_clock=125829120;
	return 0;
	}

	static int q40_set_rtc_pll(struct rtc_pll_info *pll)
	{
	if (!pll->pll_ctrl){
	/* the docs are a bit unclear so I am doublesetting */
	/* RTC_WRITE here ... */
	int tmp = (pll->pll_value & 31) \| (pll->pll_value<0 ? 32 : 0) \|
	Q40_RTC_WRITE;
	Q40_RTC_CTRL \|= Q40_RTC_WRITE;
	Q40_RTC_CTRL = tmp;
	Q40_RTC_CTRL &= ~(Q40_RTC_WRITE);
	return 0;
	} else
	return -EINVAL;
	}