summaryrefslogtreecommitdiffstats
path: root/arch/m68k/mvme16x
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/mvme16x')
-rw-r--r--arch/m68k/mvme16x/Makefile6
-rw-r--r--arch/m68k/mvme16x/config.c455
-rw-r--r--arch/m68k/mvme16x/rtc.c165
3 files changed, 626 insertions, 0 deletions
diff --git a/arch/m68k/mvme16x/Makefile b/arch/m68k/mvme16x/Makefile
new file mode 100644
index 0000000000..a8a368c2cb
--- /dev/null
+++ b/arch/m68k/mvme16x/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Linux arch/m68k/mvme16x source directory
+#
+
+obj-y := config.o rtc.o
diff --git a/arch/m68k/mvme16x/config.c b/arch/m68k/mvme16x/config.c
new file mode 100644
index 0000000000..f00c7aa058
--- /dev/null
+++ b/arch/m68k/mvme16x/config.c
@@ -0,0 +1,455 @@
+/*
+ * 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/clocksource.h>
+#include <linux/console.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/major.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/setup.h>
+#include <asm/irq.h>
+#include <asm/traps.h>
+#include <asm/machdep.h>
+#include <asm/mvme16xhw.h>
+#include <asm/config.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(void);
+extern int mvme16x_hwclk (int, struct rtc_time *);
+extern void mvme16x_reset (void);
+
+int bcd2int (unsigned char b);
+
+
+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)
+{
+ pr_info("\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 (0xfff42000)
+#define PCCSCCMICR (PCC2CHIP + 0x1d)
+#define PCCSCCTICR (PCC2CHIP + 0x1e)
+#define PCCSCCRICR (PCC2CHIP + 0x1f)
+#define PCCTPIACKR (PCC2CHIP + 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 (in_8(PCCSCCTICR) & 0x20)
+ {
+ /* We have a Tx int. Acknowledge it */
+ sink = in_8(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_sched_init = mvme16x_sched_init;
+ mach_init_IRQ = mvme16x_init_IRQ;
+ mach_hwclk = mvme16x_hwclk;
+ 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))
+ {
+ pr_crit("Bug call .BRD_ID returned garbage - giving up\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);
+ pr_info("BRD_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;
+
+ pr_info("MVME%x Hardware status:\n", brdno);
+ pr_info(" CPU Type 68%s040\n",
+ rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
+ pr_info(" CPU clock %dMHz\n",
+ rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
+ pr_info(" VMEchip2 %spresent\n",
+ rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
+ pr_info(" SCSI interface %spresent\n",
+ rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
+ pr_info(" 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 u64 mvme16x_read_clk(struct clocksource *cs);
+
+static struct clocksource mvme16x_clk = {
+ .name = "pcc",
+ .rating = 250,
+ .read = mvme16x_read_clk,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static u32 clk_total;
+
+#define PCC_TIMER_CLOCK_FREQ 1000000
+#define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ)
+
+#define PCCTCMP1 (PCC2CHIP + 0x04)
+#define PCCTCNT1 (PCC2CHIP + 0x08)
+#define PCCTOVR1 (PCC2CHIP + 0x17)
+#define PCCTIC1 (PCC2CHIP + 0x1b)
+
+#define PCCTOVR1_TIC_EN 0x01
+#define PCCTOVR1_COC_EN 0x02
+#define PCCTOVR1_OVR_CLR 0x04
+
+#define PCCTIC1_INT_LEVEL 6
+#define PCCTIC1_INT_CLR 0x08
+#define PCCTIC1_INT_EN 0x10
+
+static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
+ out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
+ clk_total += PCC_TIMER_CYCLES;
+ legacy_timer_tick(1);
+ local_irq_restore(flags);
+
+ return IRQ_HANDLED;
+}
+
+void mvme16x_sched_init(void)
+{
+ uint16_t brdno = be16_to_cpu(mvme_bdid.brdno);
+ int irq;
+
+ /* Using PCCchip2 or MC2 chip tick timer 1 */
+ if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, IRQF_TIMER, "timer",
+ NULL))
+ panic ("Couldn't register timer int");
+
+ out_be32(PCCTCNT1, 0);
+ out_be32(PCCTCMP1, PCC_TIMER_CYCLES);
+ out_8(PCCTOVR1, PCCTOVR1_OVR_CLR | PCCTOVR1_TIC_EN | PCCTOVR1_COC_EN);
+ out_8(PCCTIC1, PCCTIC1_INT_EN | PCCTIC1_INT_CLR | PCCTIC1_INT_LEVEL);
+
+ clocksource_register_hz(&mvme16x_clk, PCC_TIMER_CLOCK_FREQ);
+
+ 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");
+}
+
+static u64 mvme16x_read_clk(struct clocksource *cs)
+{
+ unsigned long flags;
+ u8 overflow, tmp;
+ u32 ticks;
+
+ local_irq_save(flags);
+ tmp = in_8(PCCTOVR1) >> 4;
+ ticks = in_be32(PCCTCNT1);
+ overflow = in_8(PCCTOVR1) >> 4;
+ if (overflow != tmp)
+ ticks = in_be32(PCCTCNT1);
+ ticks += overflow * PCC_TIMER_CYCLES;
+ ticks += clk_total;
+ local_irq_restore(flags);
+
+ return ticks;
+}
+
+int bcd2int (unsigned char b)
+{
+ return ((b>>4)*10 + (b&15));
+}
+
+int mvme16x_hwclk(int op, struct rtc_time *t)
+{
+ if (!op) {
+ rtc->ctrl = RTC_READ;
+ t->tm_year = bcd2int (rtc->bcd_year);
+ t->tm_mon = bcd2int(rtc->bcd_mth) - 1;
+ 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;
+ if (t->tm_year < 70)
+ t->tm_year += 100;
+ } else {
+ /* FIXME Setting the time is not yet supported */
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
diff --git a/arch/m68k/mvme16x/rtc.c b/arch/m68k/mvme16x/rtc.c
new file mode 100644
index 0000000000..ccbaae1125
--- /dev/null
+++ b/arch/m68k/mvme16x/rtc.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Real Time Clock interface for Linux on the MVME16x
+ *
+ * Based on the PC driver by Paul Gortmaker.
+ */
+
+#define RTC_VERSION "1.00"
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/ioport.h>
+#include <linux/capability.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/rtc.h> /* For struct rtc_time and ioctls, etc */
+#include <linux/bcd.h>
+#include <asm/mvme16xhw.h>
+
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <asm/setup.h>
+
+/*
+ * We sponge a minor off of the misc major. No need slurping
+ * up another valuable major dev number for this. If you add
+ * an ioctl, make sure you don't conflict with SPARC's RTC
+ * ioctls.
+ */
+
+static const unsigned char days_in_mo[] =
+{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+
+static atomic_t rtc_ready = ATOMIC_INIT(1);
+
+static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ volatile MK48T08ptr_t rtc = (MK48T08ptr_t)MVME_RTC_BASE;
+ unsigned long flags;
+ struct rtc_time wtime;
+ void __user *argp = (void __user *)arg;
+
+ switch (cmd) {
+ case RTC_RD_TIME: /* Read the time/date from RTC */
+ {
+ local_irq_save(flags);
+ /* Ensure clock and real-time-mode-register are accessible */
+ rtc->ctrl = RTC_READ;
+ memset(&wtime, 0, sizeof(struct rtc_time));
+ wtime.tm_sec = bcd2bin(rtc->bcd_sec);
+ wtime.tm_min = bcd2bin(rtc->bcd_min);
+ wtime.tm_hour = bcd2bin(rtc->bcd_hr);
+ wtime.tm_mday = bcd2bin(rtc->bcd_dom);
+ wtime.tm_mon = bcd2bin(rtc->bcd_mth)-1;
+ wtime.tm_year = bcd2bin(rtc->bcd_year);
+ if (wtime.tm_year < 70)
+ wtime.tm_year += 100;
+ wtime.tm_wday = bcd2bin(rtc->bcd_dow)-1;
+ rtc->ctrl = 0;
+ local_irq_restore(flags);
+ return copy_to_user(argp, &wtime, sizeof wtime) ?
+ -EFAULT : 0;
+ }
+ case RTC_SET_TIME: /* Set the RTC */
+ {
+ struct rtc_time rtc_tm;
+ unsigned char mon, day, hrs, min, sec, leap_yr;
+ unsigned int yrs;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ if (copy_from_user(&rtc_tm, argp, sizeof(struct rtc_time)))
+ return -EFAULT;
+
+ yrs = rtc_tm.tm_year;
+ if (yrs < 1900)
+ yrs += 1900;
+ mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */
+ day = rtc_tm.tm_mday;
+ hrs = rtc_tm.tm_hour;
+ min = rtc_tm.tm_min;
+ sec = rtc_tm.tm_sec;
+
+ leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400));
+
+ if ((mon > 12) || (day == 0))
+ return -EINVAL;
+
+ if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr)))
+ return -EINVAL;
+
+ if ((hrs >= 24) || (min >= 60) || (sec >= 60))
+ return -EINVAL;
+
+ if (yrs >= 2070)
+ return -EINVAL;
+
+ local_irq_save(flags);
+ rtc->ctrl = RTC_WRITE;
+
+ rtc->bcd_sec = bin2bcd(sec);
+ rtc->bcd_min = bin2bcd(min);
+ rtc->bcd_hr = bin2bcd(hrs);
+ rtc->bcd_dom = bin2bcd(day);
+ rtc->bcd_mth = bin2bcd(mon);
+ rtc->bcd_year = bin2bcd(yrs%100);
+
+ rtc->ctrl = 0;
+ local_irq_restore(flags);
+ return 0;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+/*
+ * We enforce only one user at a time here with the open/close.
+ */
+static int rtc_open(struct inode *inode, struct file *file)
+{
+ if( !atomic_dec_and_test(&rtc_ready) )
+ {
+ atomic_inc( &rtc_ready );
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static int rtc_release(struct inode *inode, struct file *file)
+{
+ atomic_inc( &rtc_ready );
+ return 0;
+}
+
+/*
+ * The various file operations we support.
+ */
+
+static const struct file_operations rtc_fops = {
+ .unlocked_ioctl = rtc_ioctl,
+ .open = rtc_open,
+ .release = rtc_release,
+ .llseek = noop_llseek,
+};
+
+static struct miscdevice rtc_dev=
+{
+ .minor = RTC_MINOR,
+ .name = "rtc",
+ .fops = &rtc_fops
+};
+
+static int __init rtc_MK48T08_init(void)
+{
+ if (!MACH_IS_MVME16x)
+ return -ENODEV;
+
+ pr_info("MK48T08 Real Time Clock Driver v%s\n", RTC_VERSION);
+ return misc_register(&rtc_dev);
+}
+device_initcall(rtc_MK48T08_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 15:02:35 +0000