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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/mvme147/config.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68k/mvme147/config.c')
-rw-r--r-- | arch/m68k/mvme147/config.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c new file mode 100644 index 0000000..0fcf972 --- /dev/null +++ b/arch/m68k/mvme147/config.c @@ -0,0 +1,229 @@ +/* + * arch/m68k/mvme147/config.c + * + * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com] + * Cloned from Richard Hirst [richard@sleepie.demon.co.uk] + * + * Based on: + * + * Copyright (C) 1993 Hamish Macdonald + * + * 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/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/genhd.h> +#include <linux/rtc.h> +#include <linux/interrupt.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/rtc.h> +#include <asm/machdep.h> +#include <asm/mvme147hw.h> + + +extern irqreturn_t mvme147_process_int (int level, struct pt_regs *regs); +extern void mvme147_init_IRQ (void); +extern void mvme147_free_irq (unsigned int, void *); +extern int show_mvme147_interrupts (struct seq_file *, void *); +extern void mvme147_enable_irq (unsigned int); +extern void mvme147_disable_irq (unsigned int); +static void mvme147_get_model(char *model); +static int mvme147_get_hardware_list(char *buffer); +extern int mvme147_request_irq (unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id); +extern void mvme147_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); +extern unsigned long mvme147_gettimeoffset (void); +extern int mvme147_hwclk (int, struct rtc_time *); +extern int mvme147_set_clock_mmss (unsigned long); +extern void mvme147_reset (void); +extern void mvme147_waitbut(void); + + +static int bcd2int (unsigned char b); + +/* Save tick handler routine pointer, will point to do_timer() in + * kernel/sched.c, called via mvme147_process_int() */ + +irqreturn_t (*tick_handler)(int, void *, struct pt_regs *); + + +int mvme147_parse_bootinfo(const struct bi_record *bi) +{ + if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO) + return 0; + else + return 1; +} + +void mvme147_reset(void) +{ + printk ("\r\n\nCalled mvme147_reset\r\n"); + m147_pcc->watchdog = 0x0a; /* Clear timer */ + m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */ + while (1) + ; +} + +static void mvme147_get_model(char *model) +{ + sprintf(model, "Motorola MVME147"); +} + + +static int mvme147_get_hardware_list(char *buffer) +{ + *buffer = '\0'; + + return 0; +} + + +void __init config_mvme147(void) +{ + mach_max_dma_address = 0x01000000; + mach_sched_init = mvme147_sched_init; + mach_init_IRQ = mvme147_init_IRQ; + mach_gettimeoffset = mvme147_gettimeoffset; + mach_hwclk = mvme147_hwclk; + mach_set_clock_mmss = mvme147_set_clock_mmss; + mach_reset = mvme147_reset; + mach_free_irq = mvme147_free_irq; + mach_process_int = mvme147_process_int; + mach_get_irq_list = show_mvme147_interrupts; + mach_request_irq = mvme147_request_irq; + enable_irq = mvme147_enable_irq; + disable_irq = mvme147_disable_irq; + mach_get_model = mvme147_get_model; + mach_get_hardware_list = mvme147_get_hardware_list; + + /* Board type is only set by newer versions of vmelilo/tftplilo */ + if (!vme_brdtype) + vme_brdtype = VME_TYPE_MVME147; +} + + +/* Using pcc tick timer 1 */ + +static irqreturn_t mvme147_timer_int (int irq, void *dev_id, struct pt_regs *fp) +{ + m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; + m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1; + return tick_handler(irq, dev_id, fp); +} + + +void mvme147_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) +{ + tick_handler = timer_routine; + request_irq (PCC_IRQ_TIMER1, mvme147_timer_int, + IRQ_FLG_REPLACE, "timer 1", NULL); + + /* Init the clock with a value */ + /* our clock goes off every 6.25us */ + m147_pcc->t1_preload = PCC_TIMER_PRELOAD; + m147_pcc->t1_cntrl = 0x0; /* clear timer */ + m147_pcc->t1_cntrl = 0x3; /* start timer */ + m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */ + m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1; +} + +/* This is always executed with interrupts disabled. */ +/* XXX There are race hazards in this code XXX */ +unsigned long mvme147_gettimeoffset (void) +{ + volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012; + unsigned short n; + + n = *cp; + while (n != *cp) + n = *cp; + + n -= PCC_TIMER_PRELOAD; + return (unsigned long)n * 25 / 4; +} + +static int bcd2int (unsigned char b) +{ + return ((b>>4)*10 + (b&15)); +} + +int mvme147_hwclk(int op, struct rtc_time *t) +{ +#warning check me! + if (!op) { + m147_rtc->ctrl = RTC_READ; + t->tm_year = bcd2int (m147_rtc->bcd_year); + t->tm_mon = bcd2int (m147_rtc->bcd_mth); + t->tm_mday = bcd2int (m147_rtc->bcd_dom); + t->tm_hour = bcd2int (m147_rtc->bcd_hr); + t->tm_min = bcd2int (m147_rtc->bcd_min); + t->tm_sec = bcd2int (m147_rtc->bcd_sec); + m147_rtc->ctrl = 0; + } + return 0; +} + +int mvme147_set_clock_mmss (unsigned long nowtime) +{ + return 0; +} + +/*------------------- Serial console stuff ------------------------*/ + +static void scc_delay (void) +{ + int n; + volatile int trash; + + for (n = 0; n < 20; n++) + trash = n; +} + +static void scc_write (char ch) +{ + volatile char *p = (volatile char *)M147_SCC_A_ADDR; + + do { + scc_delay(); + } + while (!(*p & 4)); + scc_delay(); + *p = 8; + scc_delay(); + *p = ch; +} + + +void m147_scc_write (struct console *co, const char *str, unsigned count) +{ + unsigned long flags; + + local_irq_save(flags); + + while (count--) + { + if (*str == '\n') + scc_write ('\r'); + scc_write (*str++); + } + local_irq_restore(flags); +} + +void mvme147_init_console_port (struct console *co, int cflag) +{ + co->write = m147_scc_write; +} |