![Geert Uytterhoeven](/assets/img/avatar_default.png)
- Replace external declarations by proper includes where availiable. The accesses to some symbols had to be modified, as before they were declared using e.g. "extern int _end", while asm-generic/sections.h uses e.g. "extern char _end[]" - Remove unused or superfluous external declarations Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
768 lines
17 KiB
C
768 lines
17 KiB
C
/*
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* Miscellaneous Mac68K-specific stuff
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*/
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/miscdevice.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/rtc.h>
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#include <linux/mm.h>
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#include <linux/adb.h>
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#include <linux/cuda.h>
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#include <linux/pmu.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/rtc.h>
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#include <asm/system.h>
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#include <asm/segment.h>
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#include <asm/setup.h>
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#include <asm/macintosh.h>
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#include <asm/mac_via.h>
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#include <asm/mac_oss.h>
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#define BOOTINFO_COMPAT_1_0
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#include <asm/bootinfo.h>
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#include <asm/machdep.h>
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/* Offset between Unix time (1970-based) and Mac time (1904-based) */
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#define RTC_OFFSET 2082844800
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static void (*rom_reset)(void);
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#ifdef CONFIG_ADB_CUDA
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static long cuda_read_time(void)
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{
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struct adb_request req;
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long time;
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if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
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return 0;
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while (!req.complete)
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cuda_poll();
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time = (req.reply[3] << 24) | (req.reply[4] << 16)
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| (req.reply[5] << 8) | req.reply[6];
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return time - RTC_OFFSET;
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}
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static void cuda_write_time(long data)
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{
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struct adb_request req;
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data += RTC_OFFSET;
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if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
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(data >> 24) & 0xFF, (data >> 16) & 0xFF,
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(data >> 8) & 0xFF, data & 0xFF) < 0)
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return;
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while (!req.complete)
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cuda_poll();
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}
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static __u8 cuda_read_pram(int offset)
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{
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struct adb_request req;
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if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
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(offset >> 8) & 0xFF, offset & 0xFF) < 0)
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return 0;
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while (!req.complete)
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cuda_poll();
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return req.reply[3];
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}
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static void cuda_write_pram(int offset, __u8 data)
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{
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struct adb_request req;
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if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
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(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
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return;
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while (!req.complete)
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cuda_poll();
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}
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#else
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#define cuda_read_time() 0
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#define cuda_write_time(n)
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#define cuda_read_pram NULL
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#define cuda_write_pram NULL
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#endif
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#if 0 /* def CONFIG_ADB_PMU68K */
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static long pmu_read_time(void)
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{
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struct adb_request req;
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long time;
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if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
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return 0;
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while (!req.complete)
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pmu_poll();
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time = (req.reply[0] << 24) | (req.reply[1] << 16)
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| (req.reply[2] << 8) | req.reply[3];
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return time - RTC_OFFSET;
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}
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static void pmu_write_time(long data)
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{
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struct adb_request req;
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data += RTC_OFFSET;
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if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
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(data >> 24) & 0xFF, (data >> 16) & 0xFF,
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(data >> 8) & 0xFF, data & 0xFF) < 0)
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return;
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while (!req.complete)
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pmu_poll();
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}
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static __u8 pmu_read_pram(int offset)
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{
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struct adb_request req;
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if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
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(offset >> 8) & 0xFF, offset & 0xFF) < 0)
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return 0;
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while (!req.complete)
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pmu_poll();
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return req.reply[3];
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}
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static void pmu_write_pram(int offset, __u8 data)
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{
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struct adb_request req;
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if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
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(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
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return;
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while (!req.complete)
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pmu_poll();
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}
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#else
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#define pmu_read_time() 0
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#define pmu_write_time(n)
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#define pmu_read_pram NULL
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#define pmu_write_pram NULL
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#endif
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#if 0 /* def CONFIG_ADB_MACIISI */
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extern int maciisi_request(struct adb_request *req,
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void (*done)(struct adb_request *), int nbytes, ...);
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static long maciisi_read_time(void)
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{
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struct adb_request req;
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long time;
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if (maciisi_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME))
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return 0;
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time = (req.reply[3] << 24) | (req.reply[4] << 16)
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| (req.reply[5] << 8) | req.reply[6];
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return time - RTC_OFFSET;
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}
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static void maciisi_write_time(long data)
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{
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struct adb_request req;
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data += RTC_OFFSET;
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maciisi_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
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(data >> 24) & 0xFF, (data >> 16) & 0xFF,
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(data >> 8) & 0xFF, data & 0xFF);
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}
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static __u8 maciisi_read_pram(int offset)
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{
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struct adb_request req;
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if (maciisi_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
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(offset >> 8) & 0xFF, offset & 0xFF))
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return 0;
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return req.reply[3];
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}
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static void maciisi_write_pram(int offset, __u8 data)
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{
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struct adb_request req;
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maciisi_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
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(offset >> 8) & 0xFF, offset & 0xFF, data);
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}
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#else
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#define maciisi_read_time() 0
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#define maciisi_write_time(n)
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#define maciisi_read_pram NULL
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#define maciisi_write_pram NULL
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#endif
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/*
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* VIA PRAM/RTC access routines
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*
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* Must be called with interrupts disabled and
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* the RTC should be enabled.
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*/
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static __u8 via_pram_readbyte(void)
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{
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int i,reg;
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__u8 data;
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reg = via1[vBufB] & ~VIA1B_vRTCClk;
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/* Set the RTC data line to be an input. */
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via1[vDirB] &= ~VIA1B_vRTCData;
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/* The bits of the byte come out in MSB order */
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data = 0;
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for (i = 0 ; i < 8 ; i++) {
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via1[vBufB] = reg;
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via1[vBufB] = reg | VIA1B_vRTCClk;
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data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
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}
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/* Return RTC data line to output state */
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via1[vDirB] |= VIA1B_vRTCData;
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return data;
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}
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static void via_pram_writebyte(__u8 data)
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{
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int i,reg,bit;
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reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);
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/* The bits of the byte go in in MSB order */
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for (i = 0 ; i < 8 ; i++) {
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bit = data & 0x80? 1 : 0;
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data <<= 1;
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via1[vBufB] = reg | bit;
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via1[vBufB] = reg | bit | VIA1B_vRTCClk;
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}
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}
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/*
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* Execute a VIA PRAM/RTC command. For read commands
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* data should point to a one-byte buffer for the
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* resulting data. For write commands it should point
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* to the data byte to for the command.
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*
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* This function disables all interrupts while running.
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*/
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static void via_pram_command(int command, __u8 *data)
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{
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unsigned long flags;
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int is_read;
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local_irq_save(flags);
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/* Enable the RTC and make sure the strobe line is high */
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via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
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if (command & 0xFF00) { /* extended (two-byte) command */
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via_pram_writebyte((command & 0xFF00) >> 8);
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via_pram_writebyte(command & 0xFF);
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is_read = command & 0x8000;
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} else { /* one-byte command */
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via_pram_writebyte(command);
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is_read = command & 0x80;
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}
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if (is_read) {
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*data = via_pram_readbyte();
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} else {
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via_pram_writebyte(*data);
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}
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/* All done, disable the RTC */
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via1[vBufB] |= VIA1B_vRTCEnb;
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local_irq_restore(flags);
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}
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static __u8 via_read_pram(int offset)
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{
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return 0;
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}
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static void via_write_pram(int offset, __u8 data)
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{
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}
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/*
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* Return the current time in seconds since January 1, 1904.
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*
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* This only works on machines with the VIA-based PRAM/RTC, which
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* is basically any machine with Mac II-style ADB.
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*/
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static long via_read_time(void)
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{
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union {
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__u8 cdata[4];
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long idata;
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} result, last_result;
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int ct;
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/*
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* The NetBSD guys say to loop until you get the same reading
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* twice in a row.
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*/
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ct = 0;
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do {
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if (++ct > 10) {
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printk("via_read_time: couldn't get valid time, "
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"last read = 0x%08lx and 0x%08lx\n",
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last_result.idata, result.idata);
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break;
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}
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last_result.idata = result.idata;
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result.idata = 0;
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via_pram_command(0x81, &result.cdata[3]);
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via_pram_command(0x85, &result.cdata[2]);
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via_pram_command(0x89, &result.cdata[1]);
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via_pram_command(0x8D, &result.cdata[0]);
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} while (result.idata != last_result.idata);
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return result.idata - RTC_OFFSET;
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}
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/*
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* Set the current time to a number of seconds since January 1, 1904.
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*
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* This only works on machines with the VIA-based PRAM/RTC, which
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* is basically any machine with Mac II-style ADB.
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*/
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static void via_write_time(long time)
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{
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union {
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__u8 cdata[4];
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long idata;
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} data;
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__u8 temp;
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/* Clear the write protect bit */
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temp = 0x55;
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via_pram_command(0x35, &temp);
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data.idata = time + RTC_OFFSET;
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via_pram_command(0x01, &data.cdata[3]);
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via_pram_command(0x05, &data.cdata[2]);
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via_pram_command(0x09, &data.cdata[1]);
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via_pram_command(0x0D, &data.cdata[0]);
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/* Set the write protect bit */
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temp = 0xD5;
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via_pram_command(0x35, &temp);
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}
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static void via_shutdown(void)
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{
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if (rbv_present) {
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via2[rBufB] &= ~0x04;
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} else {
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/* Direction of vDirB is output */
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via2[vDirB] |= 0x04;
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/* Send a value of 0 on that line */
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via2[vBufB] &= ~0x04;
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mdelay(1000);
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}
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}
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/*
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* FIXME: not sure how this is supposed to work exactly...
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*/
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static void oss_shutdown(void)
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{
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oss->rom_ctrl = OSS_POWEROFF;
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}
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#ifdef CONFIG_ADB_CUDA
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static void cuda_restart(void)
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{
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struct adb_request req;
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if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
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return;
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while (!req.complete)
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cuda_poll();
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}
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static void cuda_shutdown(void)
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{
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struct adb_request req;
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if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
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return;
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while (!req.complete)
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cuda_poll();
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}
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#endif /* CONFIG_ADB_CUDA */
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#ifdef CONFIG_ADB_PMU68K
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void pmu_restart(void)
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{
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struct adb_request req;
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if (pmu_request(&req, NULL,
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2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
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return;
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while (!req.complete)
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pmu_poll();
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if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
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return;
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while (!req.complete)
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pmu_poll();
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}
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void pmu_shutdown(void)
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{
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struct adb_request req;
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if (pmu_request(&req, NULL,
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2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
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return;
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while (!req.complete)
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pmu_poll();
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if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
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return;
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while (!req.complete)
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pmu_poll();
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}
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#endif
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/*
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*-------------------------------------------------------------------
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* Below this point are the generic routines; they'll dispatch to the
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* correct routine for the hardware on which we're running.
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*-------------------------------------------------------------------
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*/
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void mac_pram_read(int offset, __u8 *buffer, int len)
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{
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__u8 (*func)(int);
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int i;
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switch(macintosh_config->adb_type) {
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case MAC_ADB_IISI:
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func = maciisi_read_pram; break;
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case MAC_ADB_PB1:
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case MAC_ADB_PB2:
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func = pmu_read_pram; break;
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case MAC_ADB_CUDA:
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func = cuda_read_pram; break;
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default:
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func = via_read_pram;
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}
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if (!func)
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return;
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for (i = 0 ; i < len ; i++) {
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buffer[i] = (*func)(offset++);
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}
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}
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void mac_pram_write(int offset, __u8 *buffer, int len)
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{
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void (*func)(int, __u8);
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int i;
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switch(macintosh_config->adb_type) {
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case MAC_ADB_IISI:
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func = maciisi_write_pram; break;
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case MAC_ADB_PB1:
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case MAC_ADB_PB2:
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func = pmu_write_pram; break;
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case MAC_ADB_CUDA:
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func = cuda_write_pram; break;
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default:
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func = via_write_pram;
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}
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if (!func)
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return;
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for (i = 0 ; i < len ; i++) {
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(*func)(offset++, buffer[i]);
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}
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}
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void mac_poweroff(void)
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{
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/*
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* MAC_ADB_IISI may need to be moved up here if it doesn't actually
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* work using the ADB packet method. --David Kilzer
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*/
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if (oss_present) {
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oss_shutdown();
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} else if (macintosh_config->adb_type == MAC_ADB_II) {
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via_shutdown();
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#ifdef CONFIG_ADB_CUDA
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} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
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cuda_shutdown();
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#endif
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#ifdef CONFIG_ADB_PMU68K
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} else if (macintosh_config->adb_type == MAC_ADB_PB1
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|| macintosh_config->adb_type == MAC_ADB_PB2) {
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pmu_shutdown();
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#endif
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}
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local_irq_enable();
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printk("It is now safe to turn off your Macintosh.\n");
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while(1);
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}
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void mac_reset(void)
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{
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if (macintosh_config->adb_type == MAC_ADB_II) {
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unsigned long flags;
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/* need ROMBASE in booter */
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/* indeed, plus need to MAP THE ROM !! */
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if (mac_bi_data.rombase == 0)
|
|
mac_bi_data.rombase = 0x40800000;
|
|
|
|
/* works on some */
|
|
rom_reset = (void *) (mac_bi_data.rombase + 0xa);
|
|
|
|
if (macintosh_config->ident == MAC_MODEL_SE30) {
|
|
/*
|
|
* MSch: Machines known to crash on ROM reset ...
|
|
*/
|
|
} else {
|
|
local_irq_save(flags);
|
|
|
|
rom_reset();
|
|
|
|
local_irq_restore(flags);
|
|
}
|
|
#ifdef CONFIG_ADB_CUDA
|
|
} else if (macintosh_config->adb_type == MAC_ADB_CUDA) {
|
|
cuda_restart();
|
|
#endif
|
|
#ifdef CONFIG_ADB_PMU68K
|
|
} else if (macintosh_config->adb_type == MAC_ADB_PB1
|
|
|| macintosh_config->adb_type == MAC_ADB_PB2) {
|
|
pmu_restart();
|
|
#endif
|
|
} else if (CPU_IS_030) {
|
|
|
|
/* 030-specific reset routine. The idea is general, but the
|
|
* specific registers to reset are '030-specific. Until I
|
|
* have a non-030 machine, I can't test anything else.
|
|
* -- C. Scott Ananian <cananian@alumni.princeton.edu>
|
|
*/
|
|
|
|
unsigned long rombase = 0x40000000;
|
|
|
|
/* make a 1-to-1 mapping, using the transparent tran. reg. */
|
|
unsigned long virt = (unsigned long) mac_reset;
|
|
unsigned long phys = virt_to_phys(mac_reset);
|
|
unsigned long addr = (phys&0xFF000000)|0x8777;
|
|
unsigned long offset = phys-virt;
|
|
local_irq_disable(); /* lets not screw this up, ok? */
|
|
__asm__ __volatile__(".chip 68030\n\t"
|
|
"pmove %0,%/tt0\n\t"
|
|
".chip 68k"
|
|
: : "m" (addr));
|
|
/* Now jump to physical address so we can disable MMU */
|
|
__asm__ __volatile__(
|
|
".chip 68030\n\t"
|
|
"lea %/pc@(1f),%/a0\n\t"
|
|
"addl %0,%/a0\n\t"/* fixup target address and stack ptr */
|
|
"addl %0,%/sp\n\t"
|
|
"pflusha\n\t"
|
|
"jmp %/a0@\n\t" /* jump into physical memory */
|
|
"0:.long 0\n\t" /* a constant zero. */
|
|
/* OK. Now reset everything and jump to reset vector. */
|
|
"1:\n\t"
|
|
"lea %/pc@(0b),%/a0\n\t"
|
|
"pmove %/a0@, %/tc\n\t" /* disable mmu */
|
|
"pmove %/a0@, %/tt0\n\t" /* disable tt0 */
|
|
"pmove %/a0@, %/tt1\n\t" /* disable tt1 */
|
|
"movel #0, %/a0\n\t"
|
|
"movec %/a0, %/vbr\n\t" /* clear vector base register */
|
|
"movec %/a0, %/cacr\n\t" /* disable caches */
|
|
"movel #0x0808,%/a0\n\t"
|
|
"movec %/a0, %/cacr\n\t" /* flush i&d caches */
|
|
"movew #0x2700,%/sr\n\t" /* set up status register */
|
|
"movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
|
|
"movec %/a0, %/isp\n\t"
|
|
"movel %1@(0x4),%/a0\n\t" /* load reset vector */
|
|
"reset\n\t" /* reset external devices */
|
|
"jmp %/a0@\n\t" /* jump to the reset vector */
|
|
".chip 68k"
|
|
: : "r" (offset), "a" (rombase) : "a0");
|
|
}
|
|
|
|
/* should never get here */
|
|
local_irq_enable();
|
|
printk ("Restart failed. Please restart manually.\n");
|
|
while(1);
|
|
}
|
|
|
|
/*
|
|
* This function translates seconds since 1970 into a proper date.
|
|
*
|
|
* Algorithm cribbed from glibc2.1, __offtime().
|
|
*/
|
|
#define SECS_PER_MINUTE (60)
|
|
#define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
|
|
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
|
|
|
|
static void unmktime(unsigned long time, long offset,
|
|
int *yearp, int *monp, int *dayp,
|
|
int *hourp, int *minp, int *secp)
|
|
{
|
|
/* How many days come before each month (0-12). */
|
|
static const unsigned short int __mon_yday[2][13] =
|
|
{
|
|
/* Normal years. */
|
|
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
|
|
/* Leap years. */
|
|
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
|
|
};
|
|
long int days, rem, y, wday, yday;
|
|
const unsigned short int *ip;
|
|
|
|
days = time / SECS_PER_DAY;
|
|
rem = time % SECS_PER_DAY;
|
|
rem += offset;
|
|
while (rem < 0) {
|
|
rem += SECS_PER_DAY;
|
|
--days;
|
|
}
|
|
while (rem >= SECS_PER_DAY) {
|
|
rem -= SECS_PER_DAY;
|
|
++days;
|
|
}
|
|
*hourp = rem / SECS_PER_HOUR;
|
|
rem %= SECS_PER_HOUR;
|
|
*minp = rem / SECS_PER_MINUTE;
|
|
*secp = rem % SECS_PER_MINUTE;
|
|
/* January 1, 1970 was a Thursday. */
|
|
wday = (4 + days) % 7; /* Day in the week. Not currently used */
|
|
if (wday < 0) wday += 7;
|
|
y = 1970;
|
|
|
|
#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
|
|
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
|
|
#define __isleap(year) \
|
|
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
|
|
|
|
while (days < 0 || days >= (__isleap (y) ? 366 : 365))
|
|
{
|
|
/* Guess a corrected year, assuming 365 days per year. */
|
|
long int yg = y + days / 365 - (days % 365 < 0);
|
|
|
|
/* Adjust DAYS and Y to match the guessed year. */
|
|
days -= ((yg - y) * 365
|
|
+ LEAPS_THRU_END_OF (yg - 1)
|
|
- LEAPS_THRU_END_OF (y - 1));
|
|
y = yg;
|
|
}
|
|
*yearp = y - 1900;
|
|
yday = days; /* day in the year. Not currently used. */
|
|
ip = __mon_yday[__isleap(y)];
|
|
for (y = 11; days < (long int) ip[y]; --y)
|
|
continue;
|
|
days -= ip[y];
|
|
*monp = y;
|
|
*dayp = days + 1; /* day in the month */
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Read/write the hardware clock.
|
|
*/
|
|
|
|
int mac_hwclk(int op, struct rtc_time *t)
|
|
{
|
|
unsigned long now;
|
|
|
|
if (!op) { /* read */
|
|
switch (macintosh_config->adb_type) {
|
|
case MAC_ADB_II:
|
|
case MAC_ADB_IOP:
|
|
now = via_read_time();
|
|
break;
|
|
case MAC_ADB_IISI:
|
|
now = maciisi_read_time();
|
|
break;
|
|
case MAC_ADB_PB1:
|
|
case MAC_ADB_PB2:
|
|
now = pmu_read_time();
|
|
break;
|
|
case MAC_ADB_CUDA:
|
|
now = cuda_read_time();
|
|
break;
|
|
default:
|
|
now = 0;
|
|
}
|
|
|
|
t->tm_wday = 0;
|
|
unmktime(now, 0,
|
|
&t->tm_year, &t->tm_mon, &t->tm_mday,
|
|
&t->tm_hour, &t->tm_min, &t->tm_sec);
|
|
#if 0
|
|
printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n",
|
|
t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
|
|
t->tm_hour, t->tm_min, t->tm_sec);
|
|
#endif
|
|
} else { /* write */
|
|
#if 0
|
|
printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
|
|
t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
|
|
t->tm_hour, t->tm_min, t->tm_sec);
|
|
#endif
|
|
|
|
now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
|
|
t->tm_hour, t->tm_min, t->tm_sec);
|
|
|
|
switch (macintosh_config->adb_type) {
|
|
case MAC_ADB_II:
|
|
case MAC_ADB_IOP:
|
|
via_write_time(now);
|
|
break;
|
|
case MAC_ADB_CUDA:
|
|
cuda_write_time(now);
|
|
break;
|
|
case MAC_ADB_PB1:
|
|
case MAC_ADB_PB2:
|
|
pmu_write_time(now);
|
|
break;
|
|
case MAC_ADB_IISI:
|
|
maciisi_write_time(now);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set minutes/seconds in the hardware clock
|
|
*/
|
|
|
|
int mac_set_clock_mmss (unsigned long nowtime)
|
|
{
|
|
struct rtc_time now;
|
|
|
|
mac_hwclk(0, &now);
|
|
now.tm_sec = nowtime % 60;
|
|
now.tm_min = (nowtime / 60) % 60;
|
|
mac_hwclk(1, &now);
|
|
|
|
return 0;
|
|
}
|