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kernel-ark/arch/m68k/mvme16x/config.c
Finn Thain c46f46d02c m68k/mvme16x: Adopt common boot console 
In a multi-platform kernel binary we only need one early console instance.

The difficulty here is that the common early console is started by
early_param(), whereas the MVME16x instance is started later by
config_mvme16x(). That means some interrupt setup must be done earlier.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stephen N Chivers <schivers@csc.com.au>
[Geert] Tag debug_cons_write() with __ref to kill section mismatch warning
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
2014-05-28 10:11:53 +02:00

419 lines
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/*
* arch/m68k/mvme16x/config.c
*
* Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
*
* Based on:
*
* linux/amiga/config.c
*
* 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/seq_file.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 <linux/module.h>
#include <asm/bootinfo.h>
#include <asm/bootinfo-vme.h>
#include <asm/byteorder.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/mvme16xhw.h>
extern t_bdid mvme_bdid;
static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
static void mvme16x_get_model(char *model);
extern void mvme16x_sched_init(irq_handler_t handler);
extern u32 mvme16x_gettimeoffset(void);
extern int mvme16x_hwclk (int, struct rtc_time *);
extern int mvme16x_set_clock_mmss (unsigned long);
extern void mvme16x_reset (void);
int bcd2int (unsigned char b);
/* Save tick handler routine pointer, will point to xtime_update() in
* kernel/time/timekeeping.c, called via mvme16x_process_int() */
static irq_handler_t tick_handler;
unsigned short mvme16x_config;
EXPORT_SYMBOL(mvme16x_config);
int __init mvme16x_parse_bootinfo(const struct bi_record *bi)
{
uint16_t tag = be16_to_cpu(bi->tag);
if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
return 0;
else
return 1;
}
void mvme16x_reset(void)
{
printk ("\r\n\nCalled mvme16x_reset\r\n"
"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
/* The string of returns is to delay the reset until the whole
* message is output. Assert reset bit in GCSR */
*(volatile char *)0xfff40107 = 0x80;
}
static void mvme16x_get_model(char *model)
{
p_bdid p = &mvme_bdid;
char suf[4];
suf[1] = p->brdsuffix[0];
suf[2] = p->brdsuffix[1];
suf[3] = '\0';
suf[0] = suf[1] ? '-' : '\0';
sprintf(model, "Motorola MVME%x%s", be16_to_cpu(p->brdno), suf);
}
static void mvme16x_get_hardware_list(struct seq_file *m)
{
uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
if (brdno == 0x0162 || brdno == 0x0172)
{
unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
seq_printf (m, "VMEchip2 %spresent\n",
rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
seq_printf (m, "SCSI interface %spresent\n",
rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
seq_printf (m, "Ethernet i/f %spresent\n",
rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
}
}
/*
* This function is called during kernel startup to initialize
* the mvme16x IRQ handling routines. Should probably ensure
* that the base vectors for the VMEChip2 and PCCChip2 are valid.
*/
static void __init mvme16x_init_IRQ (void)
{
m68k_setup_user_interrupt(VEC_USER, 192);
}
#define pcc2chip ((volatile u_char *)0xfff42000)
#define PccSCCMICR 0x1d
#define PccSCCTICR 0x1e
#define PccSCCRICR 0x1f
#define PccTPIACKR 0x25
#ifdef CONFIG_EARLY_PRINTK
/**** cd2401 registers ****/
#define CD2401_ADDR (0xfff45000)
#define CyGFRCR (0x81)
#define CyCCR (0x13)
#define CyCLR_CHAN (0x40)
#define CyINIT_CHAN (0x20)
#define CyCHIP_RESET (0x10)
#define CyENB_XMTR (0x08)
#define CyDIS_XMTR (0x04)
#define CyENB_RCVR (0x02)
#define CyDIS_RCVR (0x01)
#define CyCAR (0xee)
#define CyIER (0x11)
#define CyMdmCh (0x80)
#define CyRxExc (0x20)
#define CyRxData (0x08)
#define CyTxMpty (0x02)
#define CyTxRdy (0x01)
#define CyLICR (0x26)
#define CyRISR (0x89)
#define CyTIMEOUT (0x80)
#define CySPECHAR (0x70)
#define CyOVERRUN (0x08)
#define CyPARITY (0x04)
#define CyFRAME (0x02)
#define CyBREAK (0x01)
#define CyREOIR (0x84)
#define CyTEOIR (0x85)
#define CyMEOIR (0x86)
#define CyNOTRANS (0x08)
#define CyRFOC (0x30)
#define CyRDR (0xf8)
#define CyTDR (0xf8)
#define CyMISR (0x8b)
#define CyRISR (0x89)
#define CyTISR (0x8a)
#define CyMSVR1 (0xde)
#define CyMSVR2 (0xdf)
#define CyDSR (0x80)
#define CyDCD (0x40)
#define CyCTS (0x20)
#define CyDTR (0x02)
#define CyRTS (0x01)
#define CyRTPRL (0x25)
#define CyRTPRH (0x24)
#define CyCOR1 (0x10)
#define CyPARITY_NONE (0x00)
#define CyPARITY_E (0x40)
#define CyPARITY_O (0xC0)
#define Cy_5_BITS (0x04)
#define Cy_6_BITS (0x05)
#define Cy_7_BITS (0x06)
#define Cy_8_BITS (0x07)
#define CyCOR2 (0x17)
#define CyETC (0x20)
#define CyCtsAE (0x02)
#define CyCOR3 (0x16)
#define Cy_1_STOP (0x02)
#define Cy_2_STOP (0x04)
#define CyCOR4 (0x15)
#define CyREC_FIFO (0x0F) /* Receive FIFO threshold */
#define CyCOR5 (0x14)
#define CyCOR6 (0x18)
#define CyCOR7 (0x07)
#define CyRBPR (0xcb)
#define CyRCOR (0xc8)
#define CyTBPR (0xc3)
#define CyTCOR (0xc0)
#define CySCHR1 (0x1f)
#define CySCHR2 (0x1e)
#define CyTPR (0xda)
#define CyPILR1 (0xe3)
#define CyPILR2 (0xe0)
#define CyPILR3 (0xe1)
#define CyCMR (0x1b)
#define CyASYNC (0x02)
#define CyLICR (0x26)
#define CyLIVR (0x09)
#define CySCRL (0x23)
#define CySCRH (0x22)
#define CyTFTC (0x80)
void mvme16x_cons_write(struct console *co, const char *str, unsigned count)
{
volatile unsigned char *base_addr = (u_char *)CD2401_ADDR;
volatile u_char sink;
u_char ier;
int port;
u_char do_lf = 0;
int i = 0;
/* Ensure transmitter is enabled! */
port = 0;
base_addr[CyCAR] = (u_char)port;
while (base_addr[CyCCR])
;
base_addr[CyCCR] = CyENB_XMTR;
ier = base_addr[CyIER];
base_addr[CyIER] = CyTxMpty;
while (1) {
if (pcc2chip[PccSCCTICR] & 0x20)
{
/* We have a Tx int. Acknowledge it */
sink = pcc2chip[PccTPIACKR];
if ((base_addr[CyLICR] >> 2) == port) {
if (i == count) {
/* Last char of string is now output */
base_addr[CyTEOIR] = CyNOTRANS;
break;
}
if (do_lf) {
base_addr[CyTDR] = '\n';
str++;
i++;
do_lf = 0;
}
else if (*str == '\n') {
base_addr[CyTDR] = '\r';
do_lf = 1;
}
else {
base_addr[CyTDR] = *str++;
i++;
}
base_addr[CyTEOIR] = 0;
}
else
base_addr[CyTEOIR] = CyNOTRANS;
}
}
base_addr[CyIER] = ier;
}
#endif
void __init config_mvme16x(void)
{
p_bdid p = &mvme_bdid;
char id[40];
uint16_t brdno = be16_to_cpu(p->brdno);
mach_max_dma_address = 0xffffffff;
mach_sched_init = mvme16x_sched_init;
mach_init_IRQ = mvme16x_init_IRQ;
arch_gettimeoffset = mvme16x_gettimeoffset;
mach_hwclk = mvme16x_hwclk;
mach_set_clock_mmss = mvme16x_set_clock_mmss;
mach_reset = mvme16x_reset;
mach_get_model = mvme16x_get_model;
mach_get_hardware_list = mvme16x_get_hardware_list;
/* Report board revision */
if (strncmp("BDID", p->bdid, 4))
{
printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
while (1)
;
}
/* Board type is only set by newer versions of vmelilo/tftplilo */
if (vme_brdtype == 0)
vme_brdtype = brdno;
mvme16x_get_model(id);
printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
p->rev&0xf, p->yr, p->mth, p->day);
if (brdno == 0x0162 || brdno == 0x172)
{
unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
printk ("MVME%x Hardware status:\n", brdno);
printk (" CPU Type 68%s040\n",
rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
printk (" CPU clock %dMHz\n",
rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
printk (" VMEchip2 %spresent\n",
rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
printk (" SCSI interface %spresent\n",
rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
printk (" Ethernet interface %spresent\n",
rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
}
else
{
mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
}
}
static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
{
unsigned long *new = (unsigned long *)vectors;
unsigned long *old = (unsigned long *)0xffe00000;
volatile unsigned char uc, *ucp;
uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
if (brdno == 0x0162 || brdno == 0x172)
{
ucp = (volatile unsigned char *)0xfff42043;
uc = *ucp | 8;
*ucp = uc;
}
else
{
*(volatile unsigned long *)0xfff40074 = 0x40000000;
}
*(new+4) = *(old+4); /* Illegal instruction */
*(new+9) = *(old+9); /* Trace */
*(new+47) = *(old+47); /* Trap #15 */
if (brdno == 0x0162 || brdno == 0x172)
*(new+0x5e) = *(old+0x5e); /* ABORT switch */
else
*(new+0x6e) = *(old+0x6e); /* ABORT switch */
return IRQ_HANDLED;
}
static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
{
*(volatile unsigned char *)0xfff4201b |= 8;
return tick_handler(irq, dev_id);
}
void mvme16x_sched_init (irq_handler_t timer_routine)
{
uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
int irq;
tick_handler = timer_routine;
/* Using PCCchip2 or MC2 chip tick timer 1 */
*(volatile unsigned long *)0xfff42008 = 0;
*(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
*(volatile unsigned char *)0xfff42017 |= 3;
*(volatile unsigned char *)0xfff4201b = 0x16;
if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
"timer", mvme16x_timer_int))
panic ("Couldn't register timer int");
if (brdno == 0x0162 || brdno == 0x172)
irq = MVME162_IRQ_ABORT;
else
irq = MVME167_IRQ_ABORT;
if (request_irq(irq, mvme16x_abort_int, 0,
"abort", mvme16x_abort_int))
panic ("Couldn't register abort int");
}
/* This is always executed with interrupts disabled. */
u32 mvme16x_gettimeoffset(void)
{
return (*(volatile u32 *)0xfff42008) * 1000;
}
int bcd2int (unsigned char b)
{
return ((b>>4)*10 + (b&15));
}
int mvme16x_hwclk(int op, struct rtc_time *t)
{
#warning check me!
if (!op) {
rtc->ctrl = RTC_READ;
t->tm_year = bcd2int (rtc->bcd_year);
t->tm_mon = bcd2int (rtc->bcd_mth);
t->tm_mday = bcd2int (rtc->bcd_dom);
t->tm_hour = bcd2int (rtc->bcd_hr);
t->tm_min = bcd2int (rtc->bcd_min);
t->tm_sec = bcd2int (rtc->bcd_sec);
rtc->ctrl = 0;
}
return 0;
}
int mvme16x_set_clock_mmss (unsigned long nowtime)
{
return 0;
}
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