/* SPDX-License-Identifier: GPL-2.0 */ /* * Apple Peripheral System Controller (PSC) * * The PSC is used on the AV Macs to control IO functions not handled * by the VIAs (Ethernet, DSP, SCC, Sound). This includes nine DMA * channels. * * The first seven DMA channels appear to be "one-shot" and are actually * sets of two channels; one member is active while the other is being * configured, and then you flip the active member and start all over again. * The one-shot channels are grouped together and are: * * 1. SCSI * 2. Ethernet Read * 3. Ethernet Write * 4. Floppy Disk Controller * 5. SCC Channel A Receive * 6. SCC Channel B Receive * 7. SCC Channel A Transmit * * The remaining two channels are handled somewhat differently. They appear * to be closely tied and share one set of registers. They also seem to run * continuously, although how you keep the buffer filled in this scenario is * not understood as there seems to be only one input and one output buffer * pointer. * * Much of this was extrapolated from what was known about the Ethernet * registers and subsequently confirmed using MacsBug (ie by pinging the * machine with easy-to-find patterns and looking for them in the DMA * buffers, or by sending a file over the serial ports and finding the * file in the buffers.) * * 1999-05-25 (jmt) */ #define PSC_BASE (0x50F31000) /* * The IER/IFR registers work like the VIA, except that it has 4 * of them each on different interrupt levels, and each register * set only seems to handle four interrupts instead of seven. * * To access a particular set of registers, add 0xn0 to the base * where n = 3,4,5 or 6. */ #define pIFRbase 0x100 #define pIERbase 0x104 /* * One-shot DMA control registers */ #define PSC_MYSTERY 0x804 #define PSC_CTL_BASE 0xC00 #define PSC_SCSI_CTL 0xC00 #define PSC_ENETRD_CTL 0xC10 #define PSC_ENETWR_CTL 0xC20 #define PSC_FDC_CTL 0xC30 #define PSC_SCCA_CTL 0xC40 #define PSC_SCCB_CTL 0xC50 #define PSC_SCCATX_CTL 0xC60 /* * DMA channels. Add +0x10 for the second channel in the set. * You're supposed to use one channel while the other runs and * then flip channels and do the whole thing again. */ #define PSC_ADDR_BASE 0x1000 #define PSC_LEN_BASE 0x1004 #define PSC_CMD_BASE 0x1008 #define PSC_SET0 0x00 #define PSC_SET1 0x10 #define PSC_SCSI_ADDR 0x1000 /* confirmed */ #define PSC_SCSI_LEN 0x1004 /* confirmed */ #define PSC_SCSI_CMD 0x1008 /* confirmed */ #define PSC_ENETRD_ADDR 0x1020 /* confirmed */ #define PSC_ENETRD_LEN 0x1024 /* confirmed */ #define PSC_ENETRD_CMD 0x1028 /* confirmed */ #define PSC_ENETWR_ADDR 0x1040 /* confirmed */ #define PSC_ENETWR_LEN 0x1044 /* confirmed */ #define PSC_ENETWR_CMD 0x1048 /* confirmed */ #define PSC_FDC_ADDR 0x1060 /* strongly suspected */ #define PSC_FDC_LEN 0x1064 /* strongly suspected */ #define PSC_FDC_CMD 0x1068 /* strongly suspected */ #define PSC_SCCA_ADDR 0x1080 /* confirmed */ #define PSC_SCCA_LEN 0x1084 /* confirmed */ #define PSC_SCCA_CMD 0x1088 /* confirmed */ #define PSC_SCCB_ADDR 0x10A0 /* confirmed */ #define PSC_SCCB_LEN 0x10A4 /* confirmed */ #define PSC_SCCB_CMD 0x10A8 /* confirmed */ #define PSC_SCCATX_ADDR 0x10C0 /* confirmed */ #define PSC_SCCATX_LEN 0x10C4 /* confirmed */ #define PSC_SCCATX_CMD 0x10C8 /* confirmed */ /* * Free-running DMA registers. The only part known for sure are the bits in * the control register, the buffer addresses and the buffer length. Everything * else is anybody's guess. * * These registers seem to be mirrored every thirty-two bytes up until offset * 0x300. It's safe to assume then that a new set of registers starts there. */ #define PSC_SND_CTL 0x200 /* * [ 16-bit ] * Sound (Singer?) control register. * * bit 0 : ???? * bit 1 : ???? * bit 2 : Set to one to enable sound * output. Possibly a mute flag. * bit 3 : ???? * bit 4 : ???? * bit 5 : ???? * bit 6 : Set to one to enable pass-thru * audio. In this mode the audio data * seems to appear in both the input * buffer and the output buffer. * bit 7 : Set to one to activate the * sound input DMA or zero to * disable it. * bit 8 : Set to one to activate the * sound output DMA or zero to * disable it. * bit 9 : \ * bit 11 : | * These two bits control the sample * rate. Usually set to binary 10 and * MacOS 8.0 says I'm at 48 KHz. Using * a binary value of 01 makes things * sound about 1/2 speed (24 KHz?) and * binary 00 is slower still (22 KHz?) * * Setting this to 0x0000 is a good way to * kill all DMA at boot time so that the * PSC won't overwrite the kernel image * with sound data. */ /* * 0x0202 - 0x0203 is unused. Writing there * seems to clobber the control register. */ #define PSC_SND_SOURCE 0x204 /* * [ 32-bit ] * Controls input source and volume: * * bits 12-15 : input source volume, 0 - F * bits 16-19 : unknown, always 0x5 * bits 20-23 : input source selection: * 0x3 = CD Audio * 0x4 = External Audio * * The volume is definitely not the general * output volume as it doesn't affect the * alert sound volume. */ #define PSC_SND_STATUS1 0x208 /* * [ 32-bit ] * Appears to be a read-only status register. * The usual value is 0x00400002. */ #define PSC_SND_HUH3 0x20C /* * [ 16-bit ] * Unknown 16-bit value, always 0x0000. */ #define PSC_SND_BITS2GO 0x20E /* * [ 16-bit ] * Counts down to zero from some constant * value. The value appears to be the * number of _bits_ remaining before the * buffer is full, which would make sense * since Apple's docs say the sound DMA * channels are 1 bit wide. */ #define PSC_SND_INADDR 0x210 /* * [ 32-bit ] * Address of the sound input DMA buffer */ #define PSC_SND_OUTADDR 0x214 /* * [ 32-bit ] * Address of the sound output DMA buffer */ #define PSC_SND_LEN 0x218 /* * [ 16-bit ] * Length of both buffers in eight-byte units. */ #define PSC_SND_HUH4 0x21A /* * [ 16-bit ] * Unknown, always 0x0000. */ #define PSC_SND_STATUS2 0x21C /* * [ 16-bit ] * Appears to e a read-only status register. * The usual value is 0x0200. */ #define PSC_SND_HUH5 0x21E /* * [ 16-bit ] * Unknown, always 0x0000. */ #ifndef __ASSEMBLY__ extern volatile __u8 *psc; extern void psc_register_interrupts(void); extern void psc_irq_enable(int); extern void psc_irq_disable(int); /* * Access functions */ static inline void psc_write_byte(int offset, __u8 data) { *((volatile __u8 *)(psc + offset)) = data; } static inline void psc_write_word(int offset, __u16 data) { *((volatile __u16 *)(psc + offset)) = data; } static inline void psc_write_long(int offset, __u32 data) { *((volatile __u32 *)(psc + offset)) = data; } static inline u8 psc_read_byte(int offset) { return *((volatile __u8 *)(psc + offset)); } static inline u16 psc_read_word(int offset) { return *((volatile __u16 *)(psc + offset)); } static inline u32 psc_read_long(int offset) { return *((volatile __u32 *)(psc + offset)); } #endif /* __ASSEMBLY__ */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 599 B | 0644 |
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MC68328.h | File | 37.82 KB | 0644 |
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MC68EZ328.h | File | 37.74 KB | 0644 |
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MC68VZ328.h | File | 41.02 KB | 0644 |
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a.out-core.h | File | 1.98 KB | 0644 |
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adb_iop.h | File | 1.09 KB | 0644 |
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amigahw.h | File | 10.49 KB | 0644 |
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amigaints.h | File | 3.5 KB | 0644 |
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amigayle.h | File | 3.19 KB | 0644 |
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amipcmcia.h | File | 2.51 KB | 0644 |
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apollohw.h | File | 2.35 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 211 B | 0644 |
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atafd.h | File | 300 B | 0644 |
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atafdreg.h | File | 2.68 KB | 0644 |
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atari_joystick.h | File | 457 B | 0644 |
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atari_stdma.h | File | 514 B | 0644 |
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atari_stram.h | File | 528 B | 0644 |
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atarihw.h | File | 20.3 KB | 0644 |
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atariints.h | File | 5.56 KB | 0644 |
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atarikb.h | File | 1.4 KB | 0644 |
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atomic.h | File | 4.86 KB | 0644 |
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bitops.h | File | 12.19 KB | 0644 |
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blinken.h | File | 641 B | 0644 |
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bootinfo.h | File | 783 B | 0644 |
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bootstd.h | File | 4.64 KB | 0644 |
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bug.h | File | 659 B | 0644 |
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bugs.h | File | 369 B | 0644 |
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bvme6000hw.h | File | 3.45 KB | 0644 |
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cache.h | File | 296 B | 0644 |
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cacheflush.h | File | 133 B | 0644 |
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cacheflush_mm.h | File | 6.92 KB | 0644 |
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cacheflush_no.h | File | 2.61 KB | 0644 |
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checksum.h | File | 3.4 KB | 0644 |
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cmpxchg.h | File | 3.34 KB | 0644 |
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coldfire.h | File | 1.61 KB | 0644 |
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contregs.h | File | 3.31 KB | 0644 |
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current.h | File | 580 B | 0644 |
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delay.h | File | 3.43 KB | 0644 |
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div64.h | File | 858 B | 0644 |
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dma-mapping.h | File | 291 B | 0644 |
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dma.h | File | 16.65 KB | 0644 |
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dsp56k.h | File | 1.24 KB | 0644 |
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dvma.h | File | 9.67 KB | 0644 |
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elf.h | File | 3.07 KB | 0644 |
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entry.h | File | 5.76 KB | 0644 |
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export.h | File | 74 B | 0644 |
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fb.h | File | 921 B | 0644 |
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fbio.h | File | 9.87 KB | 0644 |
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flat.h | File | 1.02 KB | 0644 |
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floppy.h | File | 5.06 KB | 0644 |
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fpu.h | File | 535 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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gpio.h | File | 2.64 KB | 0644 |
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hardirq.h | File | 594 B | 0644 |
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hash.h | File | 2.07 KB | 0644 |
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hp300hw.h | File | 186 B | 0644 |
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hwtest.h | File | 467 B | 0644 |
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ide.h | File | 1.67 KB | 0644 |
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idprom.h | File | 725 B | 0644 |
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intersil.h | File | 1.11 KB | 0644 |
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io.h | File | 383 B | 0644 |
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io_mm.h | File | 16.19 KB | 0644 |
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io_no.h | File | 5.26 KB | 0644 |
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irq.h | File | 2.57 KB | 0644 |
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irqflags.h | File | 1.61 KB | 0644 |
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kexec.h | File | 732 B | 0644 |
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linkage.h | File | 1.55 KB | 0644 |
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m5206sim.h | File | 6.4 KB | 0644 |
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m520xsim.h | File | 7.15 KB | 0644 |
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m523xsim.h | File | 7.7 KB | 0644 |
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m525xsim.h | File | 10.57 KB | 0644 |
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m5272sim.h | File | 6.05 KB | 0644 |
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m527xsim.h | File | 13.51 KB | 0644 |
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m528xsim.h | File | 9.37 KB | 0644 |
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m52xxacr.h | File | 3.57 KB | 0644 |
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m5307sim.h | File | 7.52 KB | 0644 |
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m53xxacr.h | File | 3.6 KB | 0644 |
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m53xxsim.h | File | 53.97 KB | 0644 |
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m5407sim.h | File | 6.14 KB | 0644 |
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m5441xsim.h | File | 8.5 KB | 0644 |
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m54xxacr.h | File | 4.82 KB | 0644 |
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m54xxgpt.h | File | 3.66 KB | 0644 |
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m54xxpci.h | File | 6.13 KB | 0644 |
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m54xxsim.h | File | 3.8 KB | 0644 |
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mac_asc.h | File | 520 B | 0644 |
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mac_baboon.h | File | 999 B | 0644 |
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mac_iop.h | File | 5.37 KB | 0644 |
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mac_oss.h | File | 1.83 KB | 0644 |
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mac_psc.h | File | 7.25 KB | 0644 |
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mac_via.h | File | 11.44 KB | 0644 |
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machdep.h | File | 1.34 KB | 0644 |
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machines.h | File | 3.13 KB | 0644 |
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machw.h | File | 588 B | 0644 |
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macintosh.h | File | 2.02 KB | 0644 |
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macints.h | File | 3.28 KB | 0644 |
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math-emu.h | File | 6.74 KB | 0644 |
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mc146818rtc.h | File | 598 B | 0644 |
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mcf8390.h | File | 3.75 KB | 0644 |
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mcf_pgalloc.h | File | 2.37 KB | 0644 |
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mcf_pgtable.h | File | 9.89 KB | 0644 |
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mcfclk.h | File | 1.01 KB | 0644 |
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mcfdma.h | File | 6.51 KB | 0644 |
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mcfgpio.h | File | 8.48 KB | 0644 |
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mcfintc.h | File | 3.09 KB | 0644 |
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mcfmmu.h | File | 3.67 KB | 0644 |
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mcfpit.h | File | 2.22 KB | 0644 |
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mcfqspi.h | File | 1.82 KB | 0644 |
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mcfsim.h | File | 1.5 KB | 0644 |
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mcfslt.h | File | 1.21 KB | 0644 |
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mcftimer.h | File | 2.3 KB | 0644 |
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mcfuart.h | File | 6.91 KB | 0644 |
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mcfwdebug.h | File | 4.99 KB | 0644 |
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mmu.h | File | 243 B | 0644 |
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mmu_context.h | File | 7.2 KB | 0644 |
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mmzone.h | File | 264 B | 0644 |
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module.h | File | 847 B | 0644 |
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motorola_pgalloc.h | File | 2.26 KB | 0644 |
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motorola_pgtable.h | File | 9.2 KB | 0644 |
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movs.h | File | 1.44 KB | 0644 |
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mvme147hw.h | File | 2.81 KB | 0644 |
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mvme16xhw.h | File | 2.16 KB | 0644 |
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natfeat.h | File | 533 B | 0644 |
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nettel.h | File | 2.95 KB | 0644 |
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nubus.h | File | 1.21 KB | 0644 |
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openprom.h | File | 7.98 KB | 0644 |
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oplib.h | File | 9.54 KB | 0644 |
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page.h | File | 1.47 KB | 0644 |
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page_mm.h | File | 4.06 KB | 0644 |
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page_no.h | File | 1.28 KB | 0644 |
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page_offset.h | File | 256 B | 0644 |
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parport.h | File | 837 B | 0644 |
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pci.h | File | 458 B | 0644 |
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pgalloc.h | File | 444 B | 0644 |
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pgtable.h | File | 127 B | 0644 |
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pgtable_mm.h | File | 4.84 KB | 0644 |
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pgtable_no.h | File | 1.57 KB | 0644 |
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processor.h | File | 3.59 KB | 0644 |
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ptrace.h | File | 643 B | 0644 |
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q40_master.h | File | 2.28 KB | 0644 |
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q40ints.h | File | 749 B | 0644 |
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quicc_simple.h | File | 1.79 KB | 0644 |
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raw_io.h | File | 11.41 KB | 0644 |
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segment.h | File | 1.42 KB | 0644 |
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serial.h | File | 1.14 KB | 0644 |
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setup.h | File | 9.25 KB | 0644 |
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signal.h | File | 1.34 KB | 0644 |
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smp.h | File | 32 B | 0644 |
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string.h | File | 1.68 KB | 0644 |
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sun3-head.h | File | 353 B | 0644 |
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sun3_pgalloc.h | File | 2.26 KB | 0644 |
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sun3_pgtable.h | File | 7.65 KB | 0644 |
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sun3ints.h | File | 989 B | 0644 |
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sun3mmu.h | File | 4.91 KB | 0644 |
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sun3x.h | File | 868 B | 0644 |
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sun3xflop.h | File | 5.62 KB | 0644 |
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sun3xprom.h | File | 1.31 KB | 0644 |
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switch_to.h | File | 1.51 KB | 0644 |
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thread_info.h | File | 2.02 KB | 0644 |
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timex.h | File | 974 B | 0644 |
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tlb.h | File | 486 B | 0644 |
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tlbflush.h | File | 5.95 KB | 0644 |
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traps.h | File | 8.33 KB | 0644 |
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uaccess.h | File | 152 B | 0644 |
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uaccess_mm.h | File | 10.31 KB | 0644 |
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uaccess_no.h | File | 3.69 KB | 0644 |
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ucontext.h | File | 570 B | 0644 |
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unaligned.h | File | 600 B | 0644 |
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unistd.h | File | 952 B | 0644 |
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user.h | File | 3.78 KB | 0644 |
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vga.h | File | 651 B | 0644 |
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virtconvert.h | File | 947 B | 0644 |
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zorro.h | File | 1.17 KB | 0644 |
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