diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/m68k/mac | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/m68k/mac')
-rw-r--r-- | arch/m68k/mac/Makefile | 7 | ||||
-rw-r--r-- | arch/m68k/mac/baboon.c | 88 | ||||
-rw-r--r-- | arch/m68k/mac/config.c | 1109 | ||||
-rw-r--r-- | arch/m68k/mac/iop.c | 588 | ||||
-rw-r--r-- | arch/m68k/mac/mac_penguin.S | 76 | ||||
-rw-r--r-- | arch/m68k/mac/macboing.c | 310 | ||||
-rw-r--r-- | arch/m68k/mac/macints.c | 268 | ||||
-rw-r--r-- | arch/m68k/mac/misc.c | 665 | ||||
-rw-r--r-- | arch/m68k/mac/oss.c | 186 | ||||
-rw-r--r-- | arch/m68k/mac/psc.c | 166 | ||||
-rw-r--r-- | arch/m68k/mac/via.c | 636 |
11 files changed, 4099 insertions, 0 deletions
diff --git a/arch/m68k/mac/Makefile b/arch/m68k/mac/Makefile new file mode 100644 index 0000000000..aa0eae562b --- /dev/null +++ b/arch/m68k/mac/Makefile @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for Linux arch/m68k/mac source directory +# + +obj-y := config.o macints.o iop.o via.o oss.o psc.o \ + baboon.o macboing.o misc.o diff --git a/arch/m68k/mac/baboon.c b/arch/m68k/mac/baboon.c new file mode 100644 index 0000000000..a7d2802206 --- /dev/null +++ b/arch/m68k/mac/baboon.c @@ -0,0 +1,88 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Baboon Custom IC Management + * + * The Baboon custom IC controls the IDE, PCMCIA and media bay on the + * PowerBook 190. It multiplexes multiple interrupt sources onto the + * Nubus slot $C interrupt. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/irq.h> + +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/mac_baboon.h> + +int baboon_present; +static volatile struct baboon *baboon; + +/* + * Baboon initialization. + */ + +void __init baboon_init(void) +{ + if (macintosh_config->ident != MAC_MODEL_PB190) { + baboon = NULL; + baboon_present = 0; + return; + } + + baboon = (struct baboon *) BABOON_BASE; + baboon_present = 1; + + pr_debug("Baboon detected at %p\n", baboon); +} + +/* + * Baboon interrupt handler. + * XXX how do you clear a pending IRQ? is it even necessary? + */ + +static void baboon_irq(struct irq_desc *desc) +{ + short events, irq_bit; + int irq_num; + + events = baboon->mb_ifr & 0x07; + irq_num = IRQ_BABOON_0; + irq_bit = 1; + do { + if (events & irq_bit) { + events &= ~irq_bit; + generic_handle_irq(irq_num); + } + ++irq_num; + irq_bit <<= 1; + } while (events); +} + +/* + * Register the Baboon interrupt dispatcher on nubus slot $C. + */ + +void __init baboon_register_interrupts(void) +{ + irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq); +} + +/* + * The means for masking individual Baboon interrupts remains a mystery. + * However, since we only use the IDE IRQ, we can just enable/disable all + * Baboon interrupts. If/when we handle more than one Baboon IRQ, we must + * either figure out how to mask them individually or else implement the + * same workaround that's used for NuBus slots (see nubus_disabled and + * via_nubus_irq_shutdown). + */ + +void baboon_irq_enable(int irq) +{ + mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C)); +} + +void baboon_irq_disable(int irq) +{ + mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C)); +} diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c new file mode 100644 index 0000000000..382f656c29 --- /dev/null +++ b/arch/m68k/mac/config.c @@ -0,0 +1,1109 @@ +/* + * linux/arch/m68k/mac/config.c + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Miscellaneous linux stuff + */ + +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/reboot.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/console.h> +#include <linux/interrupt.h> +/* keyb */ +#include <linux/random.h> +#include <linux/delay.h> +/* keyb */ +#include <linux/init.h> +#include <linux/vt_kern.h> +#include <linux/platform_device.h> +#include <linux/ata_platform.h> +#include <linux/adb.h> +#include <linux/cuda.h> +#include <linux/pmu.h> +#include <linux/rtc.h> + +#include <asm/setup.h> +#include <asm/bootinfo.h> +#include <asm/bootinfo-mac.h> +#include <asm/byteorder.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/machdep.h> + +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/machw.h> + +#include <asm/mac_iop.h> +#include <asm/mac_via.h> +#include <asm/mac_oss.h> +#include <asm/mac_psc.h> +#include <asm/config.h> + +/* Mac bootinfo struct */ +struct mac_booter_data mac_bi_data; + +/* The phys. video addr. - might be bogus on some machines */ +static unsigned long mac_orig_videoaddr; + +extern int mac_hwclk(int, struct rtc_time *); +extern void iop_init(void); +extern void via_init(void); +extern void via_init_clock(void); +extern void oss_init(void); +extern void psc_init(void); +extern void baboon_init(void); + +extern void mac_mksound(unsigned int, unsigned int); + +static void mac_get_model(char *str); +static void mac_identify(void); +static void mac_report_hardware(void); + +static void __init mac_sched_init(void) +{ + via_init_clock(); +} + +/* + * Parse a Macintosh-specific record in the bootinfo + */ + +int __init mac_parse_bootinfo(const struct bi_record *record) +{ + int unknown = 0; + const void *data = record->data; + + switch (be16_to_cpu(record->tag)) { + case BI_MAC_MODEL: + mac_bi_data.id = be32_to_cpup(data); + break; + case BI_MAC_VADDR: + mac_bi_data.videoaddr = be32_to_cpup(data); + break; + case BI_MAC_VDEPTH: + mac_bi_data.videodepth = be32_to_cpup(data); + break; + case BI_MAC_VROW: + mac_bi_data.videorow = be32_to_cpup(data); + break; + case BI_MAC_VDIM: + mac_bi_data.dimensions = be32_to_cpup(data); + break; + case BI_MAC_VLOGICAL: + mac_orig_videoaddr = be32_to_cpup(data); + mac_bi_data.videological = + VIDEOMEMBASE + (mac_orig_videoaddr & ~VIDEOMEMMASK); + break; + case BI_MAC_SCCBASE: + mac_bi_data.sccbase = be32_to_cpup(data); + break; + case BI_MAC_BTIME: + mac_bi_data.boottime = be32_to_cpup(data); + break; + case BI_MAC_GMTBIAS: + mac_bi_data.gmtbias = be32_to_cpup(data); + break; + case BI_MAC_MEMSIZE: + mac_bi_data.memsize = be32_to_cpup(data); + break; + case BI_MAC_CPUID: + mac_bi_data.cpuid = be32_to_cpup(data); + break; + case BI_MAC_ROMBASE: + mac_bi_data.rombase = be32_to_cpup(data); + break; + default: + unknown = 1; + break; + } + return unknown; +} + +void __init config_mac(void) +{ + if (!MACH_IS_MAC) + pr_err("ERROR: no Mac, but config_mac() called!!\n"); + + mach_sched_init = mac_sched_init; + mach_init_IRQ = mac_init_IRQ; + mach_get_model = mac_get_model; + mach_hwclk = mac_hwclk; + mach_reset = mac_reset; + mach_halt = mac_poweroff; +#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP) + mach_beep = mac_mksound; +#endif + + /* + * Determine hardware present + */ + + mac_identify(); + mac_report_hardware(); + + /* + * AFAIK only the IIci takes a cache card. The IIfx has onboard + * cache ... someone needs to figure out how to tell if it's on or + * not. + */ + + if (macintosh_config->ident == MAC_MODEL_IICI) + mach_l2_flush = via_l2_flush; + + register_platform_power_off(mac_poweroff); +} + + +/* + * Macintosh Table: hardcoded model configuration data. + * + * Much of this was defined by Alan, based on who knows what docs. + * I've added a lot more, and some of that was pure guesswork based + * on hardware pages present on the Mac web site. Possibly wildly + * inaccurate, so look here if a new Mac model won't run. Example: if + * a Mac crashes immediately after the VIA1 registers have been dumped + * to the screen, it probably died attempting to read DirB on a RBV. + * Meaning it should have MAC_VIA_IICI here :-) + */ + +struct mac_model *macintosh_config; +EXPORT_SYMBOL(macintosh_config); + +static struct mac_model mac_data_table[] = { + /* + * We'll pretend to be a Macintosh II, that's pretty safe. + */ + + { + .ident = MAC_MODEL_II, + .name = "Unknown", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_II, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* IWM */ + }, + + /* + * Original Mac II hardware + */ + + { + .ident = MAC_MODEL_II, + .name = "II", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_II, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* IWM */ + }, { + .ident = MAC_MODEL_IIX, + .name = "IIx", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_II, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_IICX, + .name = "IIcx", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_II, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_SE30, + .name = "SE/30", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_II, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, + + /* + * Weirdified Mac II hardware - all subtly different. Gee thanks + * Apple. All these boxes seem to have VIA2 in a different place to + * the Mac II (+1A000 rather than +4000) + * CSA: see http://developer.apple.com/technotes/hw/hw_09.html + */ + + { + .ident = MAC_MODEL_IICI, + .name = "IIci", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_IIFX, + .name = "IIfx", + .adb_type = MAC_ADB_IOP, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_IIFX, + .scc_type = MAC_SCC_IOP, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_SWIM_IOP, /* SWIM */ + }, { + .ident = MAC_MODEL_IISI, + .name = "IIsi", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_IIVI, + .name = "IIvi", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM */ + }, { + .ident = MAC_MODEL_IIVX, + .name = "IIvx", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM */ + }, + + /* + * Classic models (guessing: similar to SE/30? Nope, similar to LC...) + */ + + { + .ident = MAC_MODEL_CLII, + .name = "Classic II", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .floppy_type = MAC_FLOPPY_LC, /* SWIM */ + }, { + .ident = MAC_MODEL_CCL, + .name = "Color Classic", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_CCLII, + .name = "Color Classic II", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, + + /* + * Some Mac LC machines. Basically the same as the IIci, ADB like IIsi + */ + + { + .ident = MAC_MODEL_LC, + .name = "LC", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM */ + }, { + .ident = MAC_MODEL_LCII, + .name = "LC II", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM */ + }, { + .ident = MAC_MODEL_LCIII, + .name = "LC III", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, + + /* + * Quadra. Video is at 0xF9000000, via is like a MacII. We label it + * differently as some of the stuff connected to VIA2 seems different. + * Better SCSI chip and onboard ethernet using a NatSemi SONIC except + * the 660AV and 840AV which use an AMD 79C940 (MACE). + * The 700, 900 and 950 have some I/O chips in the wrong place to + * confuse us. The 840AV has a SCSI location of its own (same as + * the 660AV). + */ + + { + .ident = MAC_MODEL_Q605, + .name = "Quadra 605", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_Q605_ACC, + .name = "Quadra 605", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_Q610, + .name = "Quadra 610", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_Q630, + .name = "Quadra 630", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .ide_type = MAC_IDE_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_PDS_COMM, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_Q650, + .name = "Quadra 650", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, + /* The Q700 does have a NS Sonic */ + { + .ident = MAC_MODEL_Q700, + .name = "Quadra 700", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA2, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM */ + }, { + .ident = MAC_MODEL_Q800, + .name = "Quadra 800", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_Q840, + .name = "Quadra 840AV", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA3, + .scc_type = MAC_SCC_PSC, + .ether_type = MAC_ETHER_MACE, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* New Age */ + }, { + .ident = MAC_MODEL_Q900, + .name = "Quadra 900", + .adb_type = MAC_ADB_IOP, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA2, + .scc_type = MAC_SCC_IOP, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_SWIM_IOP, /* SWIM */ + }, { + .ident = MAC_MODEL_Q950, + .name = "Quadra 950", + .adb_type = MAC_ADB_IOP, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA2, + .scc_type = MAC_SCC_IOP, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_SWIM_IOP, /* SWIM */ + }, + + /* + * Performa - more LC type machines + */ + + { + .ident = MAC_MODEL_P460, + .name = "Performa 460", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_P475, + .name = "Performa 475", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_P475F, + .name = "Performa 475", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_P520, + .name = "Performa 520", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_P550, + .name = "Performa 550", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, + /* These have the comm slot, and therefore possibly SONIC ethernet */ + { + .ident = MAC_MODEL_P575, + .name = "Performa 575", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS_COMM, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_P588, + .name = "Performa 588", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .ide_type = MAC_IDE_QUADRA, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_PDS_COMM, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_TV, + .name = "TV", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_P600, + .name = "Performa 600", + .adb_type = MAC_ADB_EGRET, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_LC, + .scc_type = MAC_SCC_II, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_LC, /* SWIM */ + }, + + /* + * Centris - just guessing again; maybe like Quadra. + * The C610 may or may not have SONIC. We probe to make sure. + */ + + { + .ident = MAC_MODEL_C610, + .name = "Centris 610", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_C650, + .name = "Centris 650", + .adb_type = MAC_ADB_II, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_C660, + .name = "Centris 660AV", + .adb_type = MAC_ADB_CUDA, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_QUADRA3, + .scc_type = MAC_SCC_PSC, + .ether_type = MAC_ETHER_MACE, + .expansion_type = MAC_EXP_PDS_NUBUS, + .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* New Age */ + }, + + /* + * The PowerBooks all the same "Combo" custom IC for SCSI and SCC + * and a PMU (in two variations?) for ADB. Most of them use the + * Quadra-style VIAs. A few models also have IDE from hell. + */ + + { + .ident = MAC_MODEL_PB140, + .name = "PowerBook 140", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB145, + .name = "PowerBook 145", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB150, + .name = "PowerBook 150", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_OLD, + .ide_type = MAC_IDE_PB, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB160, + .name = "PowerBook 160", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB165, + .name = "PowerBook 165", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB165C, + .name = "PowerBook 165c", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB170, + .name = "PowerBook 170", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB180, + .name = "PowerBook 180", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB180C, + .name = "PowerBook 180c", + .adb_type = MAC_ADB_PB1, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB190, + .name = "PowerBook 190", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .ide_type = MAC_IDE_BABOON, + .scc_type = MAC_SCC_QUADRA, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM 2 */ + }, { + .ident = MAC_MODEL_PB520, + .name = "PowerBook 520", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_QUADRA, + .scsi_type = MAC_SCSI_OLD, + .scc_type = MAC_SCC_QUADRA, + .ether_type = MAC_ETHER_SONIC, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM 2 */ + }, + + /* + * PowerBook Duos are pretty much like normal PowerBooks + * All of these probably have onboard SONIC in the Dock which + * means we'll have to probe for it eventually. + */ + + { + .ident = MAC_MODEL_PB210, + .name = "PowerBook Duo 210", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_DUO, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB230, + .name = "PowerBook Duo 230", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_DUO, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB250, + .name = "PowerBook Duo 250", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_DUO, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB270C, + .name = "PowerBook Duo 270c", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_DUO, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB280, + .name = "PowerBook Duo 280", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_DUO, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, { + .ident = MAC_MODEL_PB280C, + .name = "PowerBook Duo 280c", + .adb_type = MAC_ADB_PB2, + .via_type = MAC_VIA_IICI, + .scsi_type = MAC_SCSI_DUO, + .scc_type = MAC_SCC_QUADRA, + .expansion_type = MAC_EXP_NUBUS, + .floppy_type = MAC_FLOPPY_OLD, /* SWIM */ + }, + + /* + * Other stuff? + */ + + { + .ident = -1 + } +}; + +static struct resource scc_a_rsrcs[] = { + { .flags = IORESOURCE_MEM }, + { .flags = IORESOURCE_IRQ }, +}; + +static struct resource scc_b_rsrcs[] = { + { .flags = IORESOURCE_MEM }, + { .flags = IORESOURCE_IRQ }, +}; + +struct platform_device scc_a_pdev = { + .name = "scc", + .id = 0, +}; +EXPORT_SYMBOL(scc_a_pdev); + +struct platform_device scc_b_pdev = { + .name = "scc", + .id = 1, +}; +EXPORT_SYMBOL(scc_b_pdev); + +static void __init mac_identify(void) +{ + struct mac_model *m; + + /* Penguin data useful? */ + int model = mac_bi_data.id; + if (!model) { + /* no bootinfo model id -> NetBSD booter was used! */ + /* XXX FIXME: breaks for model > 31 */ + model = (mac_bi_data.cpuid >> 2) & 63; + pr_warn("No bootinfo model ID, using cpuid instead (obsolete bootloader?)\n"); + } + + macintosh_config = mac_data_table; + for (m = macintosh_config; m->ident != -1; m++) { + if (m->ident == model) { + macintosh_config = m; + break; + } + } + + /* Set up serial port resources for the console initcall. */ + + scc_a_rsrcs[0].start = (resource_size_t)mac_bi_data.sccbase + 2; + scc_a_rsrcs[0].end = scc_a_rsrcs[0].start; + scc_a_pdev.num_resources = ARRAY_SIZE(scc_a_rsrcs); + scc_a_pdev.resource = scc_a_rsrcs; + + scc_b_rsrcs[0].start = (resource_size_t)mac_bi_data.sccbase; + scc_b_rsrcs[0].end = scc_b_rsrcs[0].start; + scc_b_pdev.num_resources = ARRAY_SIZE(scc_b_rsrcs); + scc_b_pdev.resource = scc_b_rsrcs; + + switch (macintosh_config->scc_type) { + case MAC_SCC_PSC: + scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_MAC_SCC_A; + scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_MAC_SCC_B; + break; + default: + /* On non-PSC machines, the serial ports share an IRQ. */ + if (macintosh_config->ident == MAC_MODEL_IIFX) { + scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_MAC_SCC; + scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_MAC_SCC; + } else { + scc_a_rsrcs[1].start = scc_a_rsrcs[1].end = IRQ_AUTO_4; + scc_b_rsrcs[1].start = scc_b_rsrcs[1].end = IRQ_AUTO_4; + } + break; + } + + pr_info("Detected Macintosh model: %d\n", model); + + /* + * Report booter data: + */ + printk(KERN_DEBUG " Penguin bootinfo data:\n"); + printk(KERN_DEBUG " Video: addr 0x%lx row 0x%lx depth %lx dimensions %ld x %ld\n", + mac_bi_data.videoaddr, mac_bi_data.videorow, + mac_bi_data.videodepth, mac_bi_data.dimensions & 0xFFFF, + mac_bi_data.dimensions >> 16); + printk(KERN_DEBUG " Videological 0x%lx phys. 0x%lx, SCC at 0x%lx\n", + mac_bi_data.videological, mac_orig_videoaddr, + mac_bi_data.sccbase); + printk(KERN_DEBUG " Boottime: 0x%lx GMTBias: 0x%lx\n", + mac_bi_data.boottime, mac_bi_data.gmtbias); + printk(KERN_DEBUG " Machine ID: %ld CPUid: 0x%lx memory size: 0x%lx\n", + mac_bi_data.id, mac_bi_data.cpuid, mac_bi_data.memsize); + + iop_init(); + oss_init(); + via_init(); + psc_init(); + baboon_init(); + +#ifdef CONFIG_ADB_CUDA + find_via_cuda(); +#endif +#ifdef CONFIG_ADB_PMU + find_via_pmu(); +#endif +} + +static void __init mac_report_hardware(void) +{ + pr_info("Apple Macintosh %s\n", macintosh_config->name); +} + +static void mac_get_model(char *str) +{ + strcpy(str, "Macintosh "); + strcat(str, macintosh_config->name); +} + +static const struct resource mac_scsi_iifx_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = IRQ_MAC_SCSI, + .end = IRQ_MAC_SCSI, + }, { + .flags = IORESOURCE_MEM, + .start = 0x50008000, + .end = 0x50009FFF, + }, { + .flags = IORESOURCE_MEM, + .start = 0x50008000, + .end = 0x50009FFF, + }, +}; + +static const struct resource mac_scsi_duo_rsrc[] __initconst = { + { + .flags = IORESOURCE_MEM, + .start = 0xFEE02000, + .end = 0xFEE03FFF, + }, +}; + +static const struct resource mac_scsi_old_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = IRQ_MAC_SCSI, + .end = IRQ_MAC_SCSI, + }, { + .flags = IORESOURCE_MEM, + .start = 0x50010000, + .end = 0x50011FFF, + }, { + .flags = IORESOURCE_MEM, + .start = 0x50006000, + .end = 0x50007FFF, + }, +}; + +static const struct resource mac_scsi_ccl_rsrc[] __initconst = { + { + .flags = IORESOURCE_IRQ, + .start = IRQ_MAC_SCSI, + .end = IRQ_MAC_SCSI, + }, { + .flags = IORESOURCE_MEM, + .start = 0x50F10000, + .end = 0x50F11FFF, + }, { + .flags = IORESOURCE_MEM, + .start = 0x50F06000, + .end = 0x50F07FFF, + }, +}; + +static const struct resource mac_pata_quadra_rsrc[] __initconst = { + DEFINE_RES_MEM(0x50F1A000, 0x38), + DEFINE_RES_MEM(0x50F1A038, 0x04), + DEFINE_RES_IRQ(IRQ_NUBUS_F), +}; + +static const struct resource mac_pata_pb_rsrc[] __initconst = { + DEFINE_RES_MEM(0x50F1A000, 0x38), + DEFINE_RES_MEM(0x50F1A038, 0x04), + DEFINE_RES_IRQ(IRQ_NUBUS_C), +}; + +static const struct resource mac_pata_baboon_rsrc[] __initconst = { + DEFINE_RES_MEM(0x50F1A000, 0x38), + DEFINE_RES_MEM(0x50F1A038, 0x04), + DEFINE_RES_IRQ(IRQ_BABOON_1), +}; + +static const struct pata_platform_info mac_pata_data __initconst = { + .ioport_shift = 2, +}; + +int __init mac_platform_init(void) +{ + phys_addr_t swim_base = 0; + + if (!MACH_IS_MAC) + return -ENODEV; + + /* + * Serial devices + */ + + platform_device_register(&scc_a_pdev); + platform_device_register(&scc_b_pdev); + + /* + * Floppy device + */ + + switch (macintosh_config->floppy_type) { + case MAC_FLOPPY_QUADRA: + swim_base = 0x5001E000; + break; + case MAC_FLOPPY_OLD: + swim_base = 0x50016000; + break; + case MAC_FLOPPY_LC: + swim_base = 0x50F16000; + break; + } + + if (swim_base) { + struct resource swim_rsrc = { + .flags = IORESOURCE_MEM, + .start = swim_base, + .end = swim_base + 0x1FFF, + }; + + platform_device_register_simple("swim", -1, &swim_rsrc, 1); + } + + /* + * SCSI device(s) + */ + + switch (macintosh_config->scsi_type) { + case MAC_SCSI_QUADRA: + case MAC_SCSI_QUADRA3: + platform_device_register_simple("mac_esp", 0, NULL, 0); + break; + case MAC_SCSI_QUADRA2: + platform_device_register_simple("mac_esp", 0, NULL, 0); + if ((macintosh_config->ident == MAC_MODEL_Q900) || + (macintosh_config->ident == MAC_MODEL_Q950)) + platform_device_register_simple("mac_esp", 1, NULL, 0); + break; + case MAC_SCSI_IIFX: + /* Addresses from The Guide to Mac Family Hardware. + * $5000 8000 - $5000 9FFF: SCSI DMA + * $5000 A000 - $5000 BFFF: Alternate SCSI + * $5000 C000 - $5000 DFFF: Alternate SCSI (DMA) + * $5000 E000 - $5000 FFFF: Alternate SCSI (Hsk) + * The A/UX header file sys/uconfig.h says $50F0 8000. + * The "SCSI DMA" custom IC embeds the 53C80 core and + * supports Programmed IO, DMA and PDMA (hardware handshake). + */ + platform_device_register_simple("mac_scsi", 0, + mac_scsi_iifx_rsrc, ARRAY_SIZE(mac_scsi_iifx_rsrc)); + break; + case MAC_SCSI_DUO: + /* Addresses from the Duo Dock II Developer Note. + * $FEE0 2000 - $FEE0 3FFF: normal mode + * $FEE0 4000 - $FEE0 5FFF: pseudo DMA without /DRQ + * $FEE0 6000 - $FEE0 7FFF: pseudo DMA with /DRQ + * The NetBSD code indicates that both 5380 chips share + * an IRQ (?) which would need careful handling (see mac_esp). + */ + platform_device_register_simple("mac_scsi", 1, + mac_scsi_duo_rsrc, ARRAY_SIZE(mac_scsi_duo_rsrc)); + fallthrough; + case MAC_SCSI_OLD: + /* Addresses from Developer Notes for Duo System, + * PowerBook 180 & 160, 140 & 170, Macintosh IIsi + * and also from The Guide to Mac Family Hardware for + * SE/30, II, IIx, IIcx, IIci. + * $5000 6000 - $5000 7FFF: pseudo-DMA with /DRQ + * $5001 0000 - $5001 1FFF: normal mode + * $5001 2000 - $5001 3FFF: pseudo-DMA without /DRQ + * GMFH says that $5000 0000 - $50FF FFFF "wraps + * $5000 0000 - $5001 FFFF eight times" (!) + * mess.org says IIci and Color Classic do not alias + * I/O address space. + */ + platform_device_register_simple("mac_scsi", 0, + mac_scsi_old_rsrc, ARRAY_SIZE(mac_scsi_old_rsrc)); + break; + case MAC_SCSI_LC: + /* Addresses from Mac LC data in Designing Cards & Drivers 3ed. + * Also from the Developer Notes for Classic II, LC III, + * Color Classic and IIvx. + * $50F0 6000 - $50F0 7FFF: SCSI handshake + * $50F1 0000 - $50F1 1FFF: SCSI + * $50F1 2000 - $50F1 3FFF: SCSI DMA + */ + platform_device_register_simple("mac_scsi", 0, + mac_scsi_ccl_rsrc, ARRAY_SIZE(mac_scsi_ccl_rsrc)); + break; + } + + /* + * IDE device + */ + + switch (macintosh_config->ide_type) { + case MAC_IDE_QUADRA: + platform_device_register_resndata(NULL, "pata_platform", -1, + mac_pata_quadra_rsrc, ARRAY_SIZE(mac_pata_quadra_rsrc), + &mac_pata_data, sizeof(mac_pata_data)); + break; + case MAC_IDE_PB: + platform_device_register_resndata(NULL, "pata_platform", -1, + mac_pata_pb_rsrc, ARRAY_SIZE(mac_pata_pb_rsrc), + &mac_pata_data, sizeof(mac_pata_data)); + break; + case MAC_IDE_BABOON: + platform_device_register_resndata(NULL, "pata_platform", -1, + mac_pata_baboon_rsrc, ARRAY_SIZE(mac_pata_baboon_rsrc), + &mac_pata_data, sizeof(mac_pata_data)); + break; + } + + /* + * Ethernet device + */ + + if (macintosh_config->ether_type == MAC_ETHER_SONIC || + macintosh_config->expansion_type == MAC_EXP_PDS_COMM) + platform_device_register_simple("macsonic", -1, NULL, 0); + + if (macintosh_config->expansion_type == MAC_EXP_PDS || + macintosh_config->expansion_type == MAC_EXP_PDS_COMM) + platform_device_register_simple("mac89x0", -1, NULL, 0); + + if (macintosh_config->ether_type == MAC_ETHER_MACE) + platform_device_register_simple("macmace", -1, NULL, 0); + + return 0; +} + +arch_initcall(mac_platform_init); diff --git a/arch/m68k/mac/iop.c b/arch/m68k/mac/iop.c new file mode 100644 index 0000000000..010b3b5ae8 --- /dev/null +++ b/arch/m68k/mac/iop.c @@ -0,0 +1,588 @@ +/* + * I/O Processor (IOP) management + * Written and (C) 1999 by Joshua M. Thompson (funaho@jurai.org) + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice and this list of conditions. + * 2. Redistributions in binary form must reproduce the above copyright + * notice and this list of conditions in the documentation and/or other + * materials provided with the distribution. + */ + +/* + * The IOP chips are used in the IIfx and some Quadras (900, 950) to manage + * serial and ADB. They are actually a 6502 processor and some glue logic. + * + * 990429 (jmt) - Initial implementation, just enough to knock the SCC IOP + * into compatible mode so nobody has to fiddle with the + * Serial Switch control panel anymore. + * 990603 (jmt) - Added code to grab the correct ISM IOP interrupt for OSS + * and non-OSS machines (at least I hope it's correct on a + * non-OSS machine -- someone with a Q900 or Q950 needs to + * check this.) + * 990605 (jmt) - Rearranged things a bit wrt IOP detection; iop_present is + * gone, IOP base addresses are now in an array and the + * globally-visible functions take an IOP number instead of + * an actual base address. + * 990610 (jmt) - Finished the message passing framework and it seems to work. + * Sending _definitely_ works; my adb-bus.c mods can send + * messages and receive the MSG_COMPLETED status back from the + * IOP. The trick now is figuring out the message formats. + * 990611 (jmt) - More cleanups. Fixed problem where unclaimed messages on a + * receive channel were never properly acknowledged. Bracketed + * the remaining debug printk's with #ifdef's and disabled + * debugging. I can now type on the console. + * 990612 (jmt) - Copyright notice added. Reworked the way replies are handled. + * It turns out that replies are placed back in the send buffer + * for that channel; messages on the receive channels are always + * unsolicited messages from the IOP (and our replies to them + * should go back in the receive channel.) Also added tracking + * of device names to the listener functions ala the interrupt + * handlers. + * 990729 (jmt) - Added passing of pt_regs structure to IOP handlers. This is + * used by the new unified ADB driver. + * + * TODO: + * + * o The SCC IOP has to be placed in bypass mode before the serial console + * gets initialized. iop_init() would be one place to do that. Or the + * bootloader could do that. For now, the Serial Switch control panel + * is needed for that -- contrary to the changelog above. + * o Something should be periodically checking iop_alive() to make sure the + * IOP hasn't died. + * o Some of the IOP manager routines need better error checking and + * return codes. Nothing major, just prettying up. + */ + +/* + * ----------------------- + * IOP Message Passing 101 + * ----------------------- + * + * The host talks to the IOPs using a rather simple message-passing scheme via + * a shared memory area in the IOP RAM. Each IOP has seven "channels"; each + * channel is connected to a specific software driver on the IOP. For example + * on the SCC IOP there is one channel for each serial port. Each channel has + * an incoming and an outgoing message queue with a depth of one. + * + * A message is 32 bytes plus a state byte for the channel (MSG_IDLE, MSG_NEW, + * MSG_RCVD, MSG_COMPLETE). To send a message you copy the message into the + * buffer, set the state to MSG_NEW and signal the IOP by setting the IRQ flag + * in the IOP control to 1. The IOP will move the state to MSG_RCVD when it + * receives the message and then to MSG_COMPLETE when the message processing + * has completed. It is the host's responsibility at that point to read the + * reply back out of the send channel buffer and reset the channel state back + * to MSG_IDLE. + * + * To receive message from the IOP the same procedure is used except the roles + * are reversed. That is, the IOP puts message in the channel with a state of + * MSG_NEW, and the host receives the message and move its state to MSG_RCVD + * and then to MSG_COMPLETE when processing is completed and the reply (if any) + * has been placed back in the receive channel. The IOP will then reset the + * channel state to MSG_IDLE. + * + * Two sets of host interrupts are provided, INT0 and INT1. Both appear on one + * interrupt level; they are distinguished by a pair of bits in the IOP status + * register. The IOP will raise INT0 when one or more messages in the send + * channels have gone to the MSG_COMPLETE state and it will raise INT1 when one + * or more messages on the receive channels have gone to the MSG_NEW state. + * + * Since each channel handles only one message we have to implement a small + * interrupt-driven queue on our end. Messages to be sent are placed on the + * queue for sending and contain a pointer to an optional callback function. + * The handler for a message is called when the message state goes to + * MSG_COMPLETE. + * + * For receiving message we maintain a list of handler functions to call when + * a message is received on that IOP/channel combination. The handlers are + * called much like an interrupt handler and are passed a copy of the message + * from the IOP. The message state will be in MSG_RCVD while the handler runs; + * it is the handler's responsibility to call iop_complete_message() when + * finished; this function moves the message state to MSG_COMPLETE and signals + * the IOP. This two-step process is provided to allow the handler to defer + * message processing to a bottom-half handler if the processing will take + * a significant amount of time (handlers are called at interrupt time so they + * should execute quickly.) + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/interrupt.h> + +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/mac_iop.h> + +#ifdef DEBUG +#define iop_pr_debug(fmt, ...) \ + printk(KERN_DEBUG "%s: " fmt, __func__, ##__VA_ARGS__) +#define iop_pr_cont(fmt, ...) \ + printk(KERN_CONT fmt, ##__VA_ARGS__) +#else +#define iop_pr_debug(fmt, ...) \ + no_printk(KERN_DEBUG "%s: " fmt, __func__, ##__VA_ARGS__) +#define iop_pr_cont(fmt, ...) \ + no_printk(KERN_CONT fmt, ##__VA_ARGS__) +#endif + +/* Non-zero if the IOPs are present */ + +int iop_scc_present, iop_ism_present; + +/* structure for tracking channel listeners */ + +struct listener { + const char *devname; + void (*handler)(struct iop_msg *); +}; + +/* + * IOP structures for the two IOPs + * + * The SCC IOP controls both serial ports (A and B) as its two functions. + * The ISM IOP controls the SWIM (floppy drive) and ADB. + */ + +static volatile struct mac_iop *iop_base[NUM_IOPS]; + +/* + * IOP message queues + */ + +static struct iop_msg iop_msg_pool[NUM_IOP_MSGS]; +static struct iop_msg *iop_send_queue[NUM_IOPS][NUM_IOP_CHAN]; +static struct listener iop_listeners[NUM_IOPS][NUM_IOP_CHAN]; + +irqreturn_t iop_ism_irq(int, void *); + +/* + * Private access functions + */ + +static __inline__ void iop_loadaddr(volatile struct mac_iop *iop, __u16 addr) +{ + iop->ram_addr_lo = addr; + iop->ram_addr_hi = addr >> 8; +} + +static __inline__ __u8 iop_readb(volatile struct mac_iop *iop, __u16 addr) +{ + iop->ram_addr_lo = addr; + iop->ram_addr_hi = addr >> 8; + return iop->ram_data; +} + +static __inline__ void iop_writeb(volatile struct mac_iop *iop, __u16 addr, __u8 data) +{ + iop->ram_addr_lo = addr; + iop->ram_addr_hi = addr >> 8; + iop->ram_data = data; +} + +static __inline__ void iop_stop(volatile struct mac_iop *iop) +{ + iop->status_ctrl = IOP_AUTOINC; +} + +static __inline__ void iop_start(volatile struct mac_iop *iop) +{ + iop->status_ctrl = IOP_RUN | IOP_AUTOINC; +} + +static __inline__ void iop_interrupt(volatile struct mac_iop *iop) +{ + iop->status_ctrl = IOP_IRQ | IOP_RUN | IOP_AUTOINC; +} + +static int iop_alive(volatile struct mac_iop *iop) +{ + int retval; + + retval = (iop_readb(iop, IOP_ADDR_ALIVE) == 0xFF); + iop_writeb(iop, IOP_ADDR_ALIVE, 0); + return retval; +} + +static struct iop_msg *iop_get_unused_msg(void) +{ + int i; + unsigned long flags; + + local_irq_save(flags); + + for (i = 0 ; i < NUM_IOP_MSGS ; i++) { + if (iop_msg_pool[i].status == IOP_MSGSTATUS_UNUSED) { + iop_msg_pool[i].status = IOP_MSGSTATUS_WAITING; + local_irq_restore(flags); + return &iop_msg_pool[i]; + } + } + + local_irq_restore(flags); + return NULL; +} + +/* + * Initialize the IOPs, if present. + */ + +void __init iop_init(void) +{ + int i; + + if (macintosh_config->scc_type == MAC_SCC_IOP) { + if (macintosh_config->ident == MAC_MODEL_IIFX) + iop_base[IOP_NUM_SCC] = (struct mac_iop *)SCC_IOP_BASE_IIFX; + else + iop_base[IOP_NUM_SCC] = (struct mac_iop *)SCC_IOP_BASE_QUADRA; + iop_scc_present = 1; + pr_debug("SCC IOP detected at %p\n", iop_base[IOP_NUM_SCC]); + } + if (macintosh_config->adb_type == MAC_ADB_IOP) { + if (macintosh_config->ident == MAC_MODEL_IIFX) + iop_base[IOP_NUM_ISM] = (struct mac_iop *)ISM_IOP_BASE_IIFX; + else + iop_base[IOP_NUM_ISM] = (struct mac_iop *)ISM_IOP_BASE_QUADRA; + iop_ism_present = 1; + pr_debug("ISM IOP detected at %p\n", iop_base[IOP_NUM_ISM]); + + iop_stop(iop_base[IOP_NUM_ISM]); + iop_start(iop_base[IOP_NUM_ISM]); + iop_alive(iop_base[IOP_NUM_ISM]); /* clears the alive flag */ + } + + /* Make the whole pool available and empty the queues */ + + for (i = 0 ; i < NUM_IOP_MSGS ; i++) { + iop_msg_pool[i].status = IOP_MSGSTATUS_UNUSED; + } + + for (i = 0 ; i < NUM_IOP_CHAN ; i++) { + iop_send_queue[IOP_NUM_SCC][i] = NULL; + iop_send_queue[IOP_NUM_ISM][i] = NULL; + iop_listeners[IOP_NUM_SCC][i].devname = NULL; + iop_listeners[IOP_NUM_SCC][i].handler = NULL; + iop_listeners[IOP_NUM_ISM][i].devname = NULL; + iop_listeners[IOP_NUM_ISM][i].handler = NULL; + } +} + +/* + * Register the interrupt handler for the IOPs. + */ + +void __init iop_register_interrupts(void) +{ + if (iop_ism_present) { + if (macintosh_config->ident == MAC_MODEL_IIFX) { + if (request_irq(IRQ_MAC_ADB, iop_ism_irq, 0, + "ISM IOP", (void *)IOP_NUM_ISM)) + pr_err("Couldn't register ISM IOP interrupt\n"); + } else { + if (request_irq(IRQ_VIA2_0, iop_ism_irq, 0, "ISM IOP", + (void *)IOP_NUM_ISM)) + pr_err("Couldn't register ISM IOP interrupt\n"); + } + if (!iop_alive(iop_base[IOP_NUM_ISM])) { + pr_warn("IOP: oh my god, they killed the ISM IOP!\n"); + } else { + pr_warn("IOP: the ISM IOP seems to be alive.\n"); + } + } +} + +/* + * Register or unregister a listener for a specific IOP and channel + * + * If the handler pointer is NULL the current listener (if any) is + * unregistered. Otherwise the new listener is registered provided + * there is no existing listener registered. + */ + +int iop_listen(uint iop_num, uint chan, + void (*handler)(struct iop_msg *), + const char *devname) +{ + if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return -EINVAL; + if (chan >= NUM_IOP_CHAN) return -EINVAL; + if (iop_listeners[iop_num][chan].handler && handler) return -EINVAL; + iop_listeners[iop_num][chan].devname = devname; + iop_listeners[iop_num][chan].handler = handler; + return 0; +} + +/* + * Complete reception of a message, which just means copying the reply + * into the buffer, setting the channel state to MSG_COMPLETE and + * notifying the IOP. + */ + +void iop_complete_message(struct iop_msg *msg) +{ + int iop_num = msg->iop_num; + int chan = msg->channel; + int i,offset; + + iop_pr_debug("iop_num %d chan %d reply %*ph\n", + msg->iop_num, msg->channel, IOP_MSG_LEN, msg->reply); + + offset = IOP_ADDR_RECV_MSG + (msg->channel * IOP_MSG_LEN); + + for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) { + iop_writeb(iop_base[iop_num], offset, msg->reply[i]); + } + + iop_writeb(iop_base[iop_num], + IOP_ADDR_RECV_STATE + chan, IOP_MSG_COMPLETE); + iop_interrupt(iop_base[msg->iop_num]); + + msg->status = IOP_MSGSTATUS_UNUSED; +} + +/* + * Actually put a message into a send channel buffer + */ + +static void iop_do_send(struct iop_msg *msg) +{ + volatile struct mac_iop *iop = iop_base[msg->iop_num]; + int i,offset; + + iop_pr_debug("iop_num %d chan %d message %*ph\n", + msg->iop_num, msg->channel, IOP_MSG_LEN, msg->message); + + offset = IOP_ADDR_SEND_MSG + (msg->channel * IOP_MSG_LEN); + + for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) { + iop_writeb(iop, offset, msg->message[i]); + } + + iop_writeb(iop, IOP_ADDR_SEND_STATE + msg->channel, IOP_MSG_NEW); + + iop_interrupt(iop); +} + +/* + * Handle sending a message on a channel that + * has gone into the IOP_MSG_COMPLETE state. + */ + +static void iop_handle_send(uint iop_num, uint chan) +{ + volatile struct mac_iop *iop = iop_base[iop_num]; + struct iop_msg *msg; + int i,offset; + + iop_writeb(iop, IOP_ADDR_SEND_STATE + chan, IOP_MSG_IDLE); + + if (!(msg = iop_send_queue[iop_num][chan])) return; + + msg->status = IOP_MSGSTATUS_COMPLETE; + offset = IOP_ADDR_SEND_MSG + (chan * IOP_MSG_LEN); + for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) { + msg->reply[i] = iop_readb(iop, offset); + } + iop_pr_debug("iop_num %d chan %d reply %*ph\n", + iop_num, chan, IOP_MSG_LEN, msg->reply); + + if (msg->handler) (*msg->handler)(msg); + msg->status = IOP_MSGSTATUS_UNUSED; + msg = msg->next; + iop_send_queue[iop_num][chan] = msg; + if (msg && iop_readb(iop, IOP_ADDR_SEND_STATE + chan) == IOP_MSG_IDLE) + iop_do_send(msg); +} + +/* + * Handle reception of a message on a channel that has + * gone into the IOP_MSG_NEW state. + */ + +static void iop_handle_recv(uint iop_num, uint chan) +{ + volatile struct mac_iop *iop = iop_base[iop_num]; + int i,offset; + struct iop_msg *msg; + + msg = iop_get_unused_msg(); + msg->iop_num = iop_num; + msg->channel = chan; + msg->status = IOP_MSGSTATUS_UNSOL; + msg->handler = iop_listeners[iop_num][chan].handler; + + offset = IOP_ADDR_RECV_MSG + (chan * IOP_MSG_LEN); + + for (i = 0 ; i < IOP_MSG_LEN ; i++, offset++) { + msg->message[i] = iop_readb(iop, offset); + } + iop_pr_debug("iop_num %d chan %d message %*ph\n", + iop_num, chan, IOP_MSG_LEN, msg->message); + + iop_writeb(iop, IOP_ADDR_RECV_STATE + chan, IOP_MSG_RCVD); + + /* If there is a listener, call it now. Otherwise complete */ + /* the message ourselves to avoid possible stalls. */ + + if (msg->handler) { + (*msg->handler)(msg); + } else { + memset(msg->reply, 0, IOP_MSG_LEN); + iop_complete_message(msg); + } +} + +/* + * Send a message + * + * The message is placed at the end of the send queue. Afterwards if the + * channel is idle we force an immediate send of the next message in the + * queue. + */ + +int iop_send_message(uint iop_num, uint chan, void *privdata, + uint msg_len, __u8 *msg_data, + void (*handler)(struct iop_msg *)) +{ + struct iop_msg *msg, *q; + + if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return -EINVAL; + if (chan >= NUM_IOP_CHAN) return -EINVAL; + if (msg_len > IOP_MSG_LEN) return -EINVAL; + + msg = iop_get_unused_msg(); + if (!msg) return -ENOMEM; + + msg->next = NULL; + msg->status = IOP_MSGSTATUS_WAITING; + msg->iop_num = iop_num; + msg->channel = chan; + msg->caller_priv = privdata; + memcpy(msg->message, msg_data, msg_len); + msg->handler = handler; + + if (!(q = iop_send_queue[iop_num][chan])) { + iop_send_queue[iop_num][chan] = msg; + iop_do_send(msg); + } else { + while (q->next) q = q->next; + q->next = msg; + } + + return 0; +} + +/* + * Upload code to the shared RAM of an IOP. + */ + +void iop_upload_code(uint iop_num, __u8 *code_start, + uint code_len, __u16 shared_ram_start) +{ + if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return; + + iop_loadaddr(iop_base[iop_num], shared_ram_start); + + while (code_len--) { + iop_base[iop_num]->ram_data = *code_start++; + } +} + +/* + * Download code from the shared RAM of an IOP. + */ + +void iop_download_code(uint iop_num, __u8 *code_start, + uint code_len, __u16 shared_ram_start) +{ + if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return; + + iop_loadaddr(iop_base[iop_num], shared_ram_start); + + while (code_len--) { + *code_start++ = iop_base[iop_num]->ram_data; + } +} + +/* + * Compare the code in the shared RAM of an IOP with a copy in system memory + * and return 0 on match or the first nonmatching system memory address on + * failure. + */ + +__u8 *iop_compare_code(uint iop_num, __u8 *code_start, + uint code_len, __u16 shared_ram_start) +{ + if ((iop_num >= NUM_IOPS) || !iop_base[iop_num]) return code_start; + + iop_loadaddr(iop_base[iop_num], shared_ram_start); + + while (code_len--) { + if (*code_start != iop_base[iop_num]->ram_data) { + return code_start; + } + code_start++; + } + return (__u8 *) 0; +} + +/* + * Handle an ISM IOP interrupt + */ + +irqreturn_t iop_ism_irq(int irq, void *dev_id) +{ + uint iop_num = (uint) dev_id; + volatile struct mac_iop *iop = iop_base[iop_num]; + int i,state; + u8 events = iop->status_ctrl & (IOP_INT0 | IOP_INT1); + + do { + iop_pr_debug("iop_num %d status %02X\n", iop_num, + iop->status_ctrl); + + /* INT0 indicates state change on an outgoing message channel */ + if (events & IOP_INT0) { + iop->status_ctrl = IOP_INT0 | IOP_RUN | IOP_AUTOINC; + for (i = 0; i < NUM_IOP_CHAN; i++) { + state = iop_readb(iop, IOP_ADDR_SEND_STATE + i); + if (state == IOP_MSG_COMPLETE) + iop_handle_send(iop_num, i); + else if (state != IOP_MSG_IDLE) + iop_pr_debug("chan %d send state %02X\n", + i, state); + } + } + + /* INT1 for incoming messages */ + if (events & IOP_INT1) { + iop->status_ctrl = IOP_INT1 | IOP_RUN | IOP_AUTOINC; + for (i = 0; i < NUM_IOP_CHAN; i++) { + state = iop_readb(iop, IOP_ADDR_RECV_STATE + i); + if (state == IOP_MSG_NEW) + iop_handle_recv(iop_num, i); + else if (state != IOP_MSG_IDLE) + iop_pr_debug("chan %d recv state %02X\n", + i, state); + } + } + + events = iop->status_ctrl & (IOP_INT0 | IOP_INT1); + } while (events); + + return IRQ_HANDLED; +} + +void iop_ism_irq_poll(uint iop_num) +{ + unsigned long flags; + + local_irq_save(flags); + iop_ism_irq(0, (void *)iop_num); + local_irq_restore(flags); +} diff --git a/arch/m68k/mac/mac_penguin.S b/arch/m68k/mac/mac_penguin.S new file mode 100644 index 0000000000..359e63bb63 --- /dev/null +++ b/arch/m68k/mac/mac_penguin.S @@ -0,0 +1,76 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +.byte \ +0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,\ 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+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00 diff --git a/arch/m68k/mac/macboing.c b/arch/m68k/mac/macboing.c new file mode 100644 index 0000000000..4de6229c7b --- /dev/null +++ b/arch/m68k/mac/macboing.c @@ -0,0 +1,310 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Mac bong noise generator. Note - we ought to put a boingy noise + * here 8) + * + * ---------------------------------------------------------------------- + * 16.11.98: + * rewrote some functions, added support for Enhanced ASC (Quadras) + * after the NetBSD asc.c console bell patch by Colin Wood/Frederick Bruck + * Juergen Mellinger (juergen.mellinger@t-online.de) + */ + +#include <linux/sched.h> +#include <linux/timer.h> + +#include <asm/macintosh.h> +#include <asm/mac_asc.h> + +static int mac_asc_inited; +/* + * dumb triangular wave table + */ +static __u8 mac_asc_wave_tab[ 0x800 ]; + +/* + * Alan's original sine table; needs interpolating to 0x800 + * (hint: interpolate or hardwire [0 -> Pi/2[, it's symmetric) + */ +static const signed char sine_data[] = { + 0, 39, 75, 103, 121, 127, 121, 103, 75, 39, + 0, -39, -75, -103, -121, -127, -121, -103, -75, -39 +}; + +/* + * where the ASC hides ... + */ +static volatile __u8* mac_asc_regs = ( void* )0x50F14000; + +/* + * sample rate; is this a good default value? + */ +static unsigned long mac_asc_samplespersec = 11050; +static int mac_bell_duration; +static unsigned long mac_bell_phase; /* 0..2*Pi -> 0..0x800 (wavetable size) */ +static unsigned long mac_bell_phasepersample; + +/* + * some function protos + */ +static void mac_init_asc( void ); +static void mac_nosound(struct timer_list *); +static void mac_quadra_start_bell( unsigned int, unsigned int, unsigned int ); +static void mac_quadra_ring_bell(struct timer_list *); +static void mac_av_start_bell( unsigned int, unsigned int, unsigned int ); +static void ( *mac_special_bell )( unsigned int, unsigned int, unsigned int ); + +/* + * our timer to start/continue/stop the bell + */ +static DEFINE_TIMER(mac_sound_timer, mac_nosound); + +/* + * Sort of initialize the sound chip (called from mac_mksound on the first + * beep). + */ +static void mac_init_asc( void ) +{ + int i; + + /* + * do some machine specific initialization + * BTW: + * the NetBSD Quadra patch identifies the Enhanced Apple Sound Chip via + * mac_asc_regs[ 0x800 ] & 0xF0 != 0 + * this makes no sense here, because we have to set the default sample + * rate anyway if we want correct frequencies + */ + switch ( macintosh_config->ident ) + { + case MAC_MODEL_IIFX: + /* + * The IIfx is always special ... + */ + mac_asc_regs = ( void* )0x50010000; + break; + /* + * not sure about how correct this list is + * machines with the EASC enhanced apple sound chip + */ + case MAC_MODEL_Q630: + case MAC_MODEL_P475: + mac_special_bell = mac_quadra_start_bell; + mac_asc_samplespersec = 22150; + break; + case MAC_MODEL_C660: + case MAC_MODEL_Q840: + /* + * The Quadra 660AV and 840AV use the "Singer" custom ASIC for sound I/O. + * It appears to be similar to the "AWACS" custom ASIC in the Power Mac + * [678]100. Because Singer and AWACS may have a similar hardware + * interface, this would imply that the code in drivers/sound/dmasound.c + * for AWACS could be used as a basis for Singer support. All we have to + * do is figure out how to do DMA on the 660AV/840AV through the PSC and + * figure out where the Singer hardware sits in memory. (I'd look in the + * vicinity of the AWACS location in a Power Mac [678]100 first, or the + * current location of the Apple Sound Chip--ASC--in other Macs.) The + * Power Mac [678]100 info can be found in MkLinux Mach kernel sources. + * + * Quoted from Apple's Tech Info Library, article number 16405: + * "Among desktop Macintosh computers, only the 660AV, 840AV, and Power + * Macintosh models have 16-bit audio input and output capability + * because of the AT&T DSP3210 hardware circuitry and the 16-bit Singer + * codec circuitry in the AVs. The Audio Waveform Amplifier and + * Converter (AWAC) chip in the Power Macintosh performs the same + * 16-bit I/O functionality. The PowerBook 500 series computers + * support 16-bit stereo output, but only mono input." + * + * Technical Information Library (TIL) article number 16405. + * https://support.apple.com/kb/TA32601 + * + * --David Kilzer + */ + mac_special_bell = mac_av_start_bell; + break; + case MAC_MODEL_Q650: + case MAC_MODEL_Q700: + case MAC_MODEL_Q800: + case MAC_MODEL_Q900: + case MAC_MODEL_Q950: + /* + * Currently not implemented! + */ + mac_special_bell = NULL; + break; + default: + /* + * Every switch needs a default + */ + mac_special_bell = NULL; + break; + } + + /* + * init the wave table with a simple triangular wave + * A sine wave would sure be nicer here ... + */ + for ( i = 0; i < 0x400; i++ ) + { + mac_asc_wave_tab[ i ] = i / 4; + mac_asc_wave_tab[ i + 0x400 ] = 0xFF - i / 4; + } + mac_asc_inited = 1; +} + +/* + * Called to make noise; current single entry to the boing driver. + * Does the job for simple ASC, calls other routines else. + * XXX Fixme: + * Should be split into asc_mksound, easc_mksound, av_mksound and + * function pointer set in mac_init_asc which would be called at + * init time. + * _This_ is rather ugly ... + */ +void mac_mksound( unsigned int freq, unsigned int length ) +{ + __u32 cfreq = ( freq << 5 ) / 468; + unsigned long flags; + int i; + + if ( mac_special_bell == NULL ) + { + /* Do nothing */ + return; + } + + if ( !mac_asc_inited ) + mac_init_asc(); + + if ( mac_special_bell ) + { + mac_special_bell( freq, length, 128 ); + return; + } + + if ( freq < 20 || freq > 20000 || length == 0 ) + { + mac_nosound( 0 ); + return; + } + + local_irq_save(flags); + + del_timer( &mac_sound_timer ); + + for ( i = 0; i < 0x800; i++ ) + mac_asc_regs[ i ] = 0; + for ( i = 0; i < 0x800; i++ ) + mac_asc_regs[ i ] = mac_asc_wave_tab[ i ]; + + for ( i = 0; i < 8; i++ ) + *( __u32* )( ( __u32 )mac_asc_regs + ASC_CONTROL + 0x814 + 8 * i ) = cfreq; + + mac_asc_regs[ 0x807 ] = 0; + mac_asc_regs[ ASC_VOLUME ] = 128; + mac_asc_regs[ 0x805 ] = 0; + mac_asc_regs[ 0x80F ] = 0; + mac_asc_regs[ ASC_MODE ] = ASC_MODE_SAMPLE; + mac_asc_regs[ ASC_ENABLE ] = ASC_ENABLE_SAMPLE; + + mac_sound_timer.expires = jiffies + length; + add_timer( &mac_sound_timer ); + + local_irq_restore(flags); +} + +/* + * regular ASC: stop whining .. + */ +static void mac_nosound(struct timer_list *unused) +{ + mac_asc_regs[ ASC_ENABLE ] = 0; +} + +/* + * EASC entry; init EASC, don't load wavetable, schedule 'start whining'. + */ +static void mac_quadra_start_bell( unsigned int freq, unsigned int length, unsigned int volume ) +{ + unsigned long flags; + + /* if the bell is already ringing, ring longer */ + if ( mac_bell_duration > 0 ) + { + mac_bell_duration += length; + return; + } + + mac_bell_duration = length; + mac_bell_phase = 0; + mac_bell_phasepersample = ( freq * sizeof( mac_asc_wave_tab ) ) / mac_asc_samplespersec; + /* this is reasonably big for small frequencies */ + + local_irq_save(flags); + + /* set the volume */ + mac_asc_regs[ 0x806 ] = volume; + + /* set up the ASC registers */ + if ( mac_asc_regs[ 0x801 ] != 1 ) + { + /* select mono mode */ + mac_asc_regs[ 0x807 ] = 0; + /* select sampled sound mode */ + mac_asc_regs[ 0x802 ] = 0; + /* ??? */ + mac_asc_regs[ 0x801 ] = 1; + mac_asc_regs[ 0x803 ] |= 0x80; + mac_asc_regs[ 0x803 ] &= 0x7F; + } + + mac_sound_timer.function = mac_quadra_ring_bell; + mac_sound_timer.expires = jiffies + 1; + add_timer( &mac_sound_timer ); + + local_irq_restore(flags); +} + +/* + * EASC 'start/continue whining'; I'm not sure why the above function didn't + * already load the wave table, or at least call this one... + * This piece keeps reloading the wave table until done. + */ +static void mac_quadra_ring_bell(struct timer_list *unused) +{ + int i, count = mac_asc_samplespersec / HZ; + unsigned long flags; + + /* + * we neither want a sound buffer overflow nor underflow, so we need to match + * the number of samples per timer interrupt as exactly as possible. + * using the asc interrupt will give better results in the future + * ...and the possibility to use a real sample (a boingy noise, maybe...) + */ + + local_irq_save(flags); + + del_timer( &mac_sound_timer ); + + if ( mac_bell_duration-- > 0 ) + { + for ( i = 0; i < count; i++ ) + { + mac_bell_phase += mac_bell_phasepersample; + mac_asc_regs[ 0 ] = mac_asc_wave_tab[ mac_bell_phase & ( sizeof( mac_asc_wave_tab ) - 1 ) ]; + } + mac_sound_timer.expires = jiffies + 1; + add_timer( &mac_sound_timer ); + } + else + mac_asc_regs[ 0x801 ] = 0; + + local_irq_restore(flags); +} + +/* + * AV code - please fill in. + */ +static void mac_av_start_bell( unsigned int freq, unsigned int length, unsigned int volume ) +{ +} diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c new file mode 100644 index 0000000000..5cbaf6e949 --- /dev/null +++ b/arch/m68k/mac/macints.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Macintosh interrupts + * + * General design: + * In contrary to the Amiga and Atari platforms, the Mac hardware seems to + * exclusively use the autovector interrupts (the 'generic level0-level7' + * interrupts with exception vectors 0x19-0x1f). The following interrupt levels + * are used: + * 1 - VIA1 + * - slot 0: one second interrupt (CA2) + * - slot 1: VBlank (CA1) + * - slot 2: ADB data ready (SR full) + * - slot 3: ADB data (CB2) + * - slot 4: ADB clock (CB1) + * - slot 5: timer 2 + * - slot 6: timer 1 + * - slot 7: status of IRQ; signals 'any enabled int.' + * + * 2 - VIA2 or RBV + * - slot 0: SCSI DRQ (CA2) + * - slot 1: NUBUS IRQ (CA1) need to read port A to find which + * - slot 2: /EXP IRQ (only on IIci) + * - slot 3: SCSI IRQ (CB2) + * - slot 4: ASC IRQ (CB1) + * - slot 5: timer 2 (not on IIci) + * - slot 6: timer 1 (not on IIci) + * - slot 7: status of IRQ; signals 'any enabled int.' + * + * Levels 3-6 vary by machine type. For VIA or RBV Macintoshes: + * + * 3 - unused (?) + * + * 4 - SCC + * + * 5 - unused (?) + * [serial errors or special conditions seem to raise level 6 + * interrupts on some models (LC4xx?)] + * + * 6 - off switch (?) + * + * Machines with Quadra-like VIA hardware, except PSC and PMU machines, support + * an alternate interrupt mapping, as used by A/UX. It spreads ethernet and + * sound out to their own autovector IRQs and gives VIA1 a higher priority: + * + * 1 - unused (?) + * + * 3 - on-board SONIC + * + * 5 - Apple Sound Chip (ASC) + * + * 6 - VIA1 + * + * For OSS Macintoshes (IIfx only), we apply an interrupt mapping similar to + * the Quadra (A/UX) mapping: + * + * 1 - ISM IOP (ADB) + * + * 2 - SCSI + * + * 3 - NuBus + * + * 4 - SCC IOP + * + * 6 - VIA1 + * + * For PSC Macintoshes (660AV, 840AV): + * + * 3 - PSC level 3 + * - slot 0: MACE + * + * 4 - PSC level 4 + * - slot 1: SCC channel A interrupt + * - slot 2: SCC channel B interrupt + * - slot 3: MACE DMA + * + * 5 - PSC level 5 + * + * 6 - PSC level 6 + * + * Finally we have good 'ole level 7, the non-maskable interrupt: + * + * 7 - NMI (programmer's switch on the back of some Macs) + * Also RAM parity error on models which support it (IIc, IIfx?) + * + * The current interrupt logic looks something like this: + * + * - We install dispatchers for the autovector interrupts (1-7). These + * dispatchers are responsible for querying the hardware (the + * VIA/RBV/OSS/PSC chips) to determine the actual interrupt source. Using + * this information a machspec interrupt number is generated by placing the + * index of the interrupt hardware into the low three bits and the original + * autovector interrupt number in the upper 5 bits. The handlers for the + * resulting machspec interrupt are then called. + * + * - Nubus is a special case because its interrupts are hidden behind two + * layers of hardware. Nubus interrupts come in as index 1 on VIA #2, + * which translates to IRQ number 17. In this spot we install _another_ + * dispatcher. This dispatcher finds the interrupting slot number (9-F) and + * then forms a new machspec interrupt number as above with the slot number + * minus 9 in the low three bits and the pseudo-level 7 in the upper five + * bits. The handlers for this new machspec interrupt number are then + * called. This puts Nubus interrupts into the range 56-62. + * + * - The Baboon interrupts (used on some PowerBooks) are an even more special + * case. They're hidden behind the Nubus slot $C interrupt thus adding a + * third layer of indirection. Why oh why did the Apple engineers do that? + * + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/sched/debug.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/delay.h> + +#include <asm/irq.h> +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/mac_via.h> +#include <asm/mac_psc.h> +#include <asm/mac_oss.h> +#include <asm/mac_iop.h> +#include <asm/mac_baboon.h> +#include <asm/hwtest.h> +#include <asm/irq_regs.h> +#include <asm/processor.h> + +static unsigned int mac_irq_startup(struct irq_data *); +static void mac_irq_shutdown(struct irq_data *); + +static struct irq_chip mac_irq_chip = { + .name = "mac", + .irq_enable = mac_irq_enable, + .irq_disable = mac_irq_disable, + .irq_startup = mac_irq_startup, + .irq_shutdown = mac_irq_shutdown, +}; + +static irqreturn_t mac_nmi_handler(int irq, void *dev_id) +{ + static volatile int in_nmi; + + if (in_nmi) + return IRQ_HANDLED; + in_nmi = 1; + + pr_info("Non-Maskable Interrupt\n"); + show_registers(get_irq_regs()); + + in_nmi = 0; + return IRQ_HANDLED; +} + +void __init mac_init_IRQ(void) +{ + m68k_setup_irq_controller(&mac_irq_chip, handle_simple_irq, IRQ_USER, + NUM_MAC_SOURCES - IRQ_USER); + + /* + * Now register the handlers for the master IRQ handlers + * at levels 1-7. Most of the work is done elsewhere. + */ + + if (oss_present) + oss_register_interrupts(); + else + via_register_interrupts(); + if (psc) + psc_register_interrupts(); + if (baboon_present) + baboon_register_interrupts(); + iop_register_interrupts(); + if (request_irq(IRQ_AUTO_7, mac_nmi_handler, 0, "NMI", + mac_nmi_handler)) + pr_err("Couldn't register NMI\n"); +} + +/* + * mac_irq_enable - enable an interrupt source + * mac_irq_disable - disable an interrupt source + * + * These routines are just dispatchers to the VIA/OSS/PSC routines. + */ + +void mac_irq_enable(struct irq_data *data) +{ + int irq = data->irq; + int irq_src = IRQ_SRC(irq); + + switch(irq_src) { + case 1: + case 2: + case 7: + if (oss_present) + oss_irq_enable(irq); + else + via_irq_enable(irq); + break; + case 3: + case 4: + case 5: + case 6: + if (psc) + psc_irq_enable(irq); + else if (oss_present) + oss_irq_enable(irq); + break; + case 8: + if (baboon_present) + baboon_irq_enable(irq); + break; + } +} + +void mac_irq_disable(struct irq_data *data) +{ + int irq = data->irq; + int irq_src = IRQ_SRC(irq); + + switch(irq_src) { + case 1: + case 2: + case 7: + if (oss_present) + oss_irq_disable(irq); + else + via_irq_disable(irq); + break; + case 3: + case 4: + case 5: + case 6: + if (psc) + psc_irq_disable(irq); + else if (oss_present) + oss_irq_disable(irq); + break; + case 8: + if (baboon_present) + baboon_irq_disable(irq); + break; + } +} + +static unsigned int mac_irq_startup(struct irq_data *data) +{ + int irq = data->irq; + + if (IRQ_SRC(irq) == 7 && !oss_present) + via_nubus_irq_startup(irq); + else + mac_irq_enable(data); + + return 0; +} + +static void mac_irq_shutdown(struct irq_data *data) +{ + int irq = data->irq; + + if (IRQ_SRC(irq) == 7 && !oss_present) + via_nubus_irq_shutdown(irq); + else + mac_irq_disable(data); +} diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c new file mode 100644 index 0000000000..c7cb29f0ff --- /dev/null +++ b/arch/m68k/mac/misc.c @@ -0,0 +1,665 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Miscellaneous Mac68K-specific stuff + */ + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/time.h> +#include <linux/rtc.h> +#include <linux/mm.h> + +#include <linux/adb.h> +#include <linux/cuda.h> +#include <linux/pmu.h> + +#include <linux/uaccess.h> +#include <asm/io.h> +#include <asm/setup.h> +#include <asm/macintosh.h> +#include <asm/mac_via.h> +#include <asm/mac_oss.h> + +#include <asm/machdep.h> + +/* + * Offset between Unix time (1970-based) and Mac time (1904-based). Cuda and PMU + * times wrap in 2040. If we need to handle later times, the read_time functions + * need to be changed to interpret wrapped times as post-2040. + */ + +#define RTC_OFFSET 2082844800 + +static void (*rom_reset)(void); + +#if IS_ENABLED(CONFIG_NVRAM) +#ifdef CONFIG_ADB_CUDA +static unsigned char cuda_pram_read_byte(int offset) +{ + struct adb_request req; + + if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM, + (offset >> 8) & 0xFF, offset & 0xFF) < 0) + return 0; + while (!req.complete) + cuda_poll(); + return req.reply[3]; +} + +static void cuda_pram_write_byte(unsigned char data, int offset) +{ + struct adb_request req; + + if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM, + (offset >> 8) & 0xFF, offset & 0xFF, data) < 0) + return; + while (!req.complete) + cuda_poll(); +} +#endif /* CONFIG_ADB_CUDA */ + +#ifdef CONFIG_ADB_PMU +static unsigned char pmu_pram_read_byte(int offset) +{ + struct adb_request req; + + if (pmu_request(&req, NULL, 3, PMU_READ_XPRAM, + offset & 0xFF, 1) < 0) + return 0; + pmu_wait_complete(&req); + + return req.reply[0]; +} + +static void pmu_pram_write_byte(unsigned char data, int offset) +{ + struct adb_request req; + + if (pmu_request(&req, NULL, 4, PMU_WRITE_XPRAM, + offset & 0xFF, 1, data) < 0) + return; + pmu_wait_complete(&req); +} +#endif /* CONFIG_ADB_PMU */ +#endif /* CONFIG_NVRAM */ + +/* + * VIA PRAM/RTC access routines + * + * Must be called with interrupts disabled and + * the RTC should be enabled. + */ + +static __u8 via_rtc_recv(void) +{ + int i, reg; + __u8 data; + + reg = via1[vBufB] & ~VIA1B_vRTCClk; + + /* Set the RTC data line to be an input. */ + + via1[vDirB] &= ~VIA1B_vRTCData; + + /* The bits of the byte come out in MSB order */ + + data = 0; + for (i = 0 ; i < 8 ; i++) { + via1[vBufB] = reg; + via1[vBufB] = reg | VIA1B_vRTCClk; + data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData); + } + + /* Return RTC data line to output state */ + + via1[vDirB] |= VIA1B_vRTCData; + + return data; +} + +static void via_rtc_send(__u8 data) +{ + int i, reg, bit; + + reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData); + + /* The bits of the byte go into the RTC in MSB order */ + + for (i = 0 ; i < 8 ; i++) { + bit = data & 0x80? 1 : 0; + data <<= 1; + via1[vBufB] = reg | bit; + via1[vBufB] = reg | bit | VIA1B_vRTCClk; + } +} + +/* + * These values can be found in Inside Macintosh vol. III ch. 2 + * which has a description of the RTC chip in the original Mac. + */ + +#define RTC_FLG_READ BIT(7) +#define RTC_FLG_WRITE_PROTECT BIT(7) +#define RTC_CMD_READ(r) (RTC_FLG_READ | (r << 2)) +#define RTC_CMD_WRITE(r) (r << 2) +#define RTC_REG_SECONDS_0 0 +#define RTC_REG_SECONDS_1 1 +#define RTC_REG_SECONDS_2 2 +#define RTC_REG_SECONDS_3 3 +#define RTC_REG_WRITE_PROTECT 13 + +/* + * Inside Mac has no information about two-byte RTC commands but + * the MAME/MESS source code has the essentials. + */ + +#define RTC_REG_XPRAM 14 +#define RTC_CMD_XPRAM_READ (RTC_CMD_READ(RTC_REG_XPRAM) << 8) +#define RTC_CMD_XPRAM_WRITE (RTC_CMD_WRITE(RTC_REG_XPRAM) << 8) +#define RTC_CMD_XPRAM_ARG(a) (((a & 0xE0) << 3) | ((a & 0x1F) << 2)) + +/* + * Execute a VIA PRAM/RTC command. For read commands + * data should point to a one-byte buffer for the + * resulting data. For write commands it should point + * to the data byte to for the command. + * + * This function disables all interrupts while running. + */ + +static void via_rtc_command(int command, __u8 *data) +{ + unsigned long flags; + int is_read; + + local_irq_save(flags); + + /* The least significant bits must be 0b01 according to Inside Mac */ + + command = (command & ~3) | 1; + + /* Enable the RTC and make sure the strobe line is high */ + + via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb; + + if (command & 0xFF00) { /* extended (two-byte) command */ + via_rtc_send((command & 0xFF00) >> 8); + via_rtc_send(command & 0xFF); + is_read = command & (RTC_FLG_READ << 8); + } else { /* one-byte command */ + via_rtc_send(command); + is_read = command & RTC_FLG_READ; + } + if (is_read) { + *data = via_rtc_recv(); + } else { + via_rtc_send(*data); + } + + /* All done, disable the RTC */ + + via1[vBufB] |= VIA1B_vRTCEnb; + + local_irq_restore(flags); +} + +#if IS_ENABLED(CONFIG_NVRAM) +static unsigned char via_pram_read_byte(int offset) +{ + unsigned char temp; + + via_rtc_command(RTC_CMD_XPRAM_READ | RTC_CMD_XPRAM_ARG(offset), &temp); + + return temp; +} + +static void via_pram_write_byte(unsigned char data, int offset) +{ + unsigned char temp; + + temp = 0x55; + via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp); + + temp = data; + via_rtc_command(RTC_CMD_XPRAM_WRITE | RTC_CMD_XPRAM_ARG(offset), &temp); + + temp = 0x55 | RTC_FLG_WRITE_PROTECT; + via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp); +} +#endif /* CONFIG_NVRAM */ + +/* + * Return the current time in seconds since January 1, 1904. + * + * This only works on machines with the VIA-based PRAM/RTC, which + * is basically any machine with Mac II-style ADB. + */ + +static time64_t via_read_time(void) +{ + union { + __u8 cdata[4]; + __u32 idata; + } result, last_result; + int count = 1; + + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0), &last_result.cdata[3]); + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1), &last_result.cdata[2]); + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2), &last_result.cdata[1]); + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3), &last_result.cdata[0]); + + /* + * The NetBSD guys say to loop until you get the same reading + * twice in a row. + */ + + while (1) { + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_0), + &result.cdata[3]); + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_1), + &result.cdata[2]); + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_2), + &result.cdata[1]); + via_rtc_command(RTC_CMD_READ(RTC_REG_SECONDS_3), + &result.cdata[0]); + + if (result.idata == last_result.idata) + return (time64_t)result.idata - RTC_OFFSET; + + if (++count > 10) + break; + + last_result.idata = result.idata; + } + + pr_err("%s: failed to read a stable value; got 0x%08x then 0x%08x\n", + __func__, last_result.idata, result.idata); + + return 0; +} + +/* + * Set the current time to a number of seconds since January 1, 1904. + * + * This only works on machines with the VIA-based PRAM/RTC, which + * is basically any machine with Mac II-style ADB. + */ + +static void via_set_rtc_time(struct rtc_time *tm) +{ + union { + __u8 cdata[4]; + __u32 idata; + } data; + __u8 temp; + time64_t time; + + time = mktime64(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, + tm->tm_hour, tm->tm_min, tm->tm_sec); + + /* Clear the write protect bit */ + + temp = 0x55; + via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp); + + data.idata = lower_32_bits(time + RTC_OFFSET); + via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_0), &data.cdata[3]); + via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_1), &data.cdata[2]); + via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_2), &data.cdata[1]); + via_rtc_command(RTC_CMD_WRITE(RTC_REG_SECONDS_3), &data.cdata[0]); + + /* Set the write protect bit */ + + temp = 0x55 | RTC_FLG_WRITE_PROTECT; + via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp); +} + +static void via_shutdown(void) +{ + if (rbv_present) { + via2[rBufB] &= ~0x04; + } else { + /* Direction of vDirB is output */ + via2[vDirB] |= 0x04; + /* Send a value of 0 on that line */ + via2[vBufB] &= ~0x04; + mdelay(1000); + } +} + +static void oss_shutdown(void) +{ + oss->rom_ctrl = OSS_POWEROFF; +} + +#ifdef CONFIG_ADB_CUDA +static void cuda_restart(void) +{ + struct adb_request req; + + if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0) + return; + while (!req.complete) + cuda_poll(); +} + +static void cuda_shutdown(void) +{ + struct adb_request req; + + if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0) + return; + + /* Avoid infinite polling loop when PSU is not under Cuda control */ + switch (macintosh_config->ident) { + case MAC_MODEL_C660: + case MAC_MODEL_Q605: + case MAC_MODEL_Q605_ACC: + case MAC_MODEL_P475: + case MAC_MODEL_P475F: + return; + } + + while (!req.complete) + cuda_poll(); +} +#endif /* CONFIG_ADB_CUDA */ + +/* + *------------------------------------------------------------------- + * Below this point are the generic routines; they'll dispatch to the + * correct routine for the hardware on which we're running. + *------------------------------------------------------------------- + */ + +#if IS_ENABLED(CONFIG_NVRAM) +unsigned char mac_pram_read_byte(int addr) +{ + switch (macintosh_config->adb_type) { + case MAC_ADB_IOP: + case MAC_ADB_II: + case MAC_ADB_PB1: + return via_pram_read_byte(addr); +#ifdef CONFIG_ADB_CUDA + case MAC_ADB_EGRET: + case MAC_ADB_CUDA: + return cuda_pram_read_byte(addr); +#endif +#ifdef CONFIG_ADB_PMU + case MAC_ADB_PB2: + return pmu_pram_read_byte(addr); +#endif + default: + return 0xFF; + } +} + +void mac_pram_write_byte(unsigned char val, int addr) +{ + switch (macintosh_config->adb_type) { + case MAC_ADB_IOP: + case MAC_ADB_II: + case MAC_ADB_PB1: + via_pram_write_byte(val, addr); + break; +#ifdef CONFIG_ADB_CUDA + case MAC_ADB_EGRET: + case MAC_ADB_CUDA: + cuda_pram_write_byte(val, addr); + break; +#endif +#ifdef CONFIG_ADB_PMU + case MAC_ADB_PB2: + pmu_pram_write_byte(val, addr); + break; +#endif + default: + break; + } +} + +ssize_t mac_pram_get_size(void) +{ + return 256; +} +#endif /* CONFIG_NVRAM */ + +void mac_poweroff(void) +{ + if (oss_present) { + oss_shutdown(); + } else if (macintosh_config->adb_type == MAC_ADB_II) { + via_shutdown(); +#ifdef CONFIG_ADB_CUDA + } else if (macintosh_config->adb_type == MAC_ADB_EGRET || + macintosh_config->adb_type == MAC_ADB_CUDA) { + cuda_shutdown(); +#endif +#ifdef CONFIG_ADB_PMU + } else if (macintosh_config->adb_type == MAC_ADB_PB2) { + pmu_shutdown(); +#endif + } + + pr_crit("It is now safe to turn off your Macintosh.\n"); + local_irq_disable(); + while(1); +} + +void mac_reset(void) +{ + if (macintosh_config->adb_type == MAC_ADB_II && + macintosh_config->ident != MAC_MODEL_SE30) { + /* need ROMBASE in booter */ + /* indeed, plus need to MAP THE ROM !! */ + + if (mac_bi_data.rombase == 0) + mac_bi_data.rombase = 0x40800000; + + /* works on some */ + rom_reset = (void *) (mac_bi_data.rombase + 0xa); + + local_irq_disable(); + rom_reset(); +#ifdef CONFIG_ADB_CUDA + } else if (macintosh_config->adb_type == MAC_ADB_EGRET || + macintosh_config->adb_type == MAC_ADB_CUDA) { + cuda_restart(); +#endif +#ifdef CONFIG_ADB_PMU + } else if (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 */ + pr_crit("Restart failed. Please restart manually.\n"); + local_irq_disable(); + while(1); +} + +/* + * This function translates seconds since 1970 into a proper date. + * + * Algorithm cribbed from glibc2.1, __offtime(). + * + * This is roughly same as rtc_time64_to_tm(), which we should probably + * use here, but it's only available when CONFIG_RTC_LIB is enabled. + */ +#define SECS_PER_MINUTE (60) +#define SECS_PER_HOUR (SECS_PER_MINUTE * 60) +#define SECS_PER_DAY (SECS_PER_HOUR * 24) + +static void unmktime(time64_t 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 } + }; + int days, rem, y, wday, yday; + const unsigned short int *ip; + + days = div_u64_rem(time, SECS_PER_DAY, &rem); + 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) +{ + time64_t now; + + if (!op) { /* read */ + switch (macintosh_config->adb_type) { + case MAC_ADB_IOP: + case MAC_ADB_II: + case MAC_ADB_PB1: + now = via_read_time(); + break; +#ifdef CONFIG_ADB_CUDA + case MAC_ADB_EGRET: + case MAC_ADB_CUDA: + now = cuda_get_time(); + break; +#endif +#ifdef CONFIG_ADB_PMU + case MAC_ADB_PB2: + now = pmu_get_time(); + break; +#endif + 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); + pr_debug("%s: read %ptR\n", __func__, t); + } else { /* write */ + pr_debug("%s: tried to write %ptR\n", __func__, t); + + switch (macintosh_config->adb_type) { + case MAC_ADB_IOP: + case MAC_ADB_II: + case MAC_ADB_PB1: + via_set_rtc_time(t); + break; +#ifdef CONFIG_ADB_CUDA + case MAC_ADB_EGRET: + case MAC_ADB_CUDA: + cuda_set_rtc_time(t); + break; +#endif +#ifdef CONFIG_ADB_PMU + case MAC_ADB_PB2: + pmu_set_rtc_time(t); + break; +#endif + default: + return -ENODEV; + } + } + return 0; +} diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c new file mode 100644 index 0000000000..921e6c092f --- /dev/null +++ b/arch/m68k/mac/oss.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Operating System Services (OSS) chip handling + * Written by Joshua M. Thompson (funaho@jurai.org) + * + * + * This chip is used in the IIfx in place of VIA #2. It acts like a fancy + * VIA chip with prorammable interrupt levels. + * + * 990502 (jmt) - Major rewrite for new interrupt architecture as well as some + * recent insights into OSS operational details. + * 990610 (jmt) - Now taking full advantage of the OSS. Interrupts are mapped + * to mostly match the A/UX interrupt scheme supported on the + * VIA side. Also added support for enabling the ISM irq again + * since we now have a functional IOP manager. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/irq.h> + +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/mac_via.h> +#include <asm/mac_oss.h> + +int oss_present; +volatile struct mac_oss *oss; + +/* + * Initialize the OSS + */ + +void __init oss_init(void) +{ + int i; + + if (macintosh_config->ident != MAC_MODEL_IIFX) + return; + + oss = (struct mac_oss *) OSS_BASE; + pr_debug("OSS detected at %p", oss); + oss_present = 1; + + /* Disable all interrupts. Unlike a VIA it looks like we */ + /* do this by setting the source's interrupt level to zero. */ + + for (i = 0; i < OSS_NUM_SOURCES; i++) + oss->irq_level[i] = 0; +} + +/* + * Handle OSS interrupts. + * XXX how do you clear a pending IRQ? is it even necessary? + */ + +static void oss_iopism_irq(struct irq_desc *desc) +{ + generic_handle_irq(IRQ_MAC_ADB); +} + +static void oss_scsi_irq(struct irq_desc *desc) +{ + generic_handle_irq(IRQ_MAC_SCSI); +} + +static void oss_nubus_irq(struct irq_desc *desc) +{ + u16 events, irq_bit; + int irq_num; + + events = oss->irq_pending & OSS_IP_NUBUS; + irq_num = NUBUS_SOURCE_BASE + 5; + irq_bit = OSS_IP_NUBUS5; + do { + if (events & irq_bit) { + events &= ~irq_bit; + generic_handle_irq(irq_num); + } + --irq_num; + irq_bit >>= 1; + } while (events); +} + +static void oss_iopscc_irq(struct irq_desc *desc) +{ + generic_handle_irq(IRQ_MAC_SCC); +} + +/* + * Register the OSS and NuBus interrupt dispatchers. + * + * This IRQ mapping is laid out with two things in mind: first, we try to keep + * things on their own levels to avoid having to do double-dispatches. Second, + * the levels match as closely as possible the alternate IRQ mapping mode (aka + * "A/UX mode") available on some VIA machines. + */ + +#define OSS_IRQLEV_IOPISM IRQ_AUTO_1 +#define OSS_IRQLEV_SCSI IRQ_AUTO_2 +#define OSS_IRQLEV_NUBUS IRQ_AUTO_3 +#define OSS_IRQLEV_IOPSCC IRQ_AUTO_4 +#define OSS_IRQLEV_VIA1 IRQ_AUTO_6 + +void __init oss_register_interrupts(void) +{ + irq_set_chained_handler(OSS_IRQLEV_IOPISM, oss_iopism_irq); + irq_set_chained_handler(OSS_IRQLEV_SCSI, oss_scsi_irq); + irq_set_chained_handler(OSS_IRQLEV_NUBUS, oss_nubus_irq); + irq_set_chained_handler(OSS_IRQLEV_IOPSCC, oss_iopscc_irq); + irq_set_chained_handler(OSS_IRQLEV_VIA1, via1_irq); + + /* OSS_VIA1 gets enabled here because it has no machspec interrupt. */ + oss->irq_level[OSS_VIA1] = OSS_IRQLEV_VIA1; +} + +/* + * Enable an OSS interrupt + * + * It looks messy but it's rather straightforward. The switch() statement + * just maps the machspec interrupt numbers to the right OSS interrupt + * source (if the OSS handles that interrupt) and then sets the interrupt + * level for that source to nonzero, thus enabling the interrupt. + */ + +void oss_irq_enable(int irq) { + switch(irq) { + case IRQ_MAC_SCC: + oss->irq_level[OSS_IOPSCC] = OSS_IRQLEV_IOPSCC; + return; + case IRQ_MAC_ADB: + oss->irq_level[OSS_IOPISM] = OSS_IRQLEV_IOPISM; + return; + case IRQ_MAC_SCSI: + oss->irq_level[OSS_SCSI] = OSS_IRQLEV_SCSI; + return; + case IRQ_NUBUS_9: + case IRQ_NUBUS_A: + case IRQ_NUBUS_B: + case IRQ_NUBUS_C: + case IRQ_NUBUS_D: + case IRQ_NUBUS_E: + irq -= NUBUS_SOURCE_BASE; + oss->irq_level[irq] = OSS_IRQLEV_NUBUS; + return; + } + + if (IRQ_SRC(irq) == 1) + via_irq_enable(irq); +} + +/* + * Disable an OSS interrupt + * + * Same as above except we set the source's interrupt level to zero, + * to disable the interrupt. + */ + +void oss_irq_disable(int irq) { + switch(irq) { + case IRQ_MAC_SCC: + oss->irq_level[OSS_IOPSCC] = 0; + return; + case IRQ_MAC_ADB: + oss->irq_level[OSS_IOPISM] = 0; + return; + case IRQ_MAC_SCSI: + oss->irq_level[OSS_SCSI] = 0; + return; + case IRQ_NUBUS_9: + case IRQ_NUBUS_A: + case IRQ_NUBUS_B: + case IRQ_NUBUS_C: + case IRQ_NUBUS_D: + case IRQ_NUBUS_E: + irq -= NUBUS_SOURCE_BASE; + oss->irq_level[irq] = 0; + return; + } + + if (IRQ_SRC(irq) == 1) + via_irq_disable(irq); +} diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c new file mode 100644 index 0000000000..0d0965b19c --- /dev/null +++ b/arch/m68k/mac/psc.c @@ -0,0 +1,166 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * 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). + * + * TO DO: + * + * Try to figure out what's going on in pIFR5 and pIFR6. There seem to be + * persisant interrupt conditions in those registers and I have no idea what + * they are. Granted it doesn't affect since we're not enabling any interrupts + * on those levels at the moment, but it would be nice to know. I have a feeling + * they aren't actually interrupt lines but data lines (to the DSP?) + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/irq.h> + +#include <asm/traps.h> +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/mac_psc.h> + +#define DEBUG_PSC + +volatile __u8 *psc; +EXPORT_SYMBOL_GPL(psc); + +/* + * Debugging dump, used in various places to see what's going on. + */ + +static void psc_debug_dump(void) +{ + int i; + + if (!psc) + return; + + for (i = 0x30 ; i < 0x70 ; i += 0x10) { + printk(KERN_DEBUG "PSC #%d: IFR = 0x%02X IER = 0x%02X\n", + i >> 4, + (int) psc_read_byte(pIFRbase + i), + (int) psc_read_byte(pIERbase + i)); + } +} + +/* + * Try to kill all DMA channels on the PSC. Not sure how this his + * supposed to work; this is code lifted from macmace.c and then + * expanded to cover what I think are the other 7 channels. + */ + +static __init void psc_dma_die_die_die(void) +{ + int i; + + for (i = 0 ; i < 9 ; i++) { + psc_write_word(PSC_CTL_BASE + (i << 4), 0x8800); + psc_write_word(PSC_CTL_BASE + (i << 4), 0x1000); + psc_write_word(PSC_CMD_BASE + (i << 5), 0x1100); + psc_write_word(PSC_CMD_BASE + (i << 5) + 0x10, 0x1100); + } +} + +/* + * Initialize the PSC. For now this just involves shutting down all + * interrupt sources using the IERs. + */ + +void __init psc_init(void) +{ + int i; + + if (macintosh_config->ident != MAC_MODEL_C660 + && macintosh_config->ident != MAC_MODEL_Q840) + { + psc = NULL; + return; + } + + /* + * The PSC is always at the same spot, but using psc + * keeps things consistent with the psc_xxxx functions. + */ + + psc = (void *) PSC_BASE; + + pr_debug("PSC detected at %p\n", psc); + + psc_dma_die_die_die(); + +#ifdef DEBUG_PSC + psc_debug_dump(); +#endif + /* + * Mask and clear all possible interrupts + */ + + for (i = 0x30 ; i < 0x70 ; i += 0x10) { + psc_write_byte(pIERbase + i, 0x0F); + psc_write_byte(pIFRbase + i, 0x0F); + } +} + +/* + * PSC interrupt handler. It's a lot like the VIA interrupt handler. + */ + +static void psc_irq(struct irq_desc *desc) +{ + unsigned int offset = (unsigned int)irq_desc_get_handler_data(desc); + unsigned int irq = irq_desc_get_irq(desc); + int pIFR = pIFRbase + offset; + int pIER = pIERbase + offset; + int irq_num; + unsigned char irq_bit, events; + + events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF; + if (!events) + return; + + irq_num = irq << 3; + irq_bit = 1; + do { + if (events & irq_bit) { + psc_write_byte(pIFR, irq_bit); + generic_handle_irq(irq_num); + } + irq_num++; + irq_bit <<= 1; + } while (events >= irq_bit); +} + +/* + * Register the PSC interrupt dispatchers for autovector interrupts 3-6. + */ + +void __init psc_register_interrupts(void) +{ + irq_set_chained_handler_and_data(IRQ_AUTO_3, psc_irq, (void *)0x30); + irq_set_chained_handler_and_data(IRQ_AUTO_4, psc_irq, (void *)0x40); + irq_set_chained_handler_and_data(IRQ_AUTO_5, psc_irq, (void *)0x50); + irq_set_chained_handler_and_data(IRQ_AUTO_6, psc_irq, (void *)0x60); +} + +void psc_irq_enable(int irq) { + int irq_src = IRQ_SRC(irq); + int irq_idx = IRQ_IDX(irq); + int pIER = pIERbase + (irq_src << 4); + + psc_write_byte(pIER, (1 << irq_idx) | 0x80); +} + +void psc_irq_disable(int irq) { + int irq_src = IRQ_SRC(irq); + int irq_idx = IRQ_IDX(irq); + int pIER = pIERbase + (irq_src << 4); + + psc_write_byte(pIER, 1 << irq_idx); +} diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c new file mode 100644 index 0000000000..3d11d6219c --- /dev/null +++ b/arch/m68k/mac/via.c @@ -0,0 +1,636 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 6522 Versatile Interface Adapter (VIA) + * + * There are two of these on the Mac II. Some IRQs are vectored + * via them as are assorted bits and bobs - eg RTC, ADB. + * + * CSA: Motorola seems to have removed documentation on the 6522 from + * their web site; try + * http://nerini.drf.com/vectrex/other/text/chips/6522/ + * http://www.zymurgy.net/classic/vic20/vicdet1.htm + * and + * http://193.23.168.87/mikro_laborversuche/via_iobaustein/via6522_1.html + * for info. A full-text web search on 6522 AND VIA will probably also + * net some usefulness. <cananian@alumni.princeton.edu> 20apr1999 + * + * Additional data is here (the SY6522 was used in the Mac II etc): + * http://www.6502.org/documents/datasheets/synertek/synertek_sy6522.pdf + * http://www.6502.org/documents/datasheets/synertek/synertek_sy6522_programming_reference.pdf + * + * PRAM/RTC access algorithms are from the NetBSD RTC toolkit version 1.08b + * by Erik Vogan and adapted to Linux by Joshua M. Thompson (funaho@jurai.org) + * + */ + +#include <linux/clocksource.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/irq.h> + +#include <asm/macintosh.h> +#include <asm/macints.h> +#include <asm/mac_via.h> +#include <asm/mac_psc.h> +#include <asm/mac_oss.h> + +volatile __u8 *via1, *via2; +int rbv_present; +int via_alt_mapping; +EXPORT_SYMBOL(via_alt_mapping); +static __u8 rbv_clear; + +/* + * Globals for accessing the VIA chip registers without having to + * check if we're hitting a real VIA or an RBV. Normally you could + * just hit the combined register (ie, vIER|rIER) but that seems to + * break on AV Macs...probably because they actually decode more than + * eight address bits. Why can't Apple engineers at least be + * _consistently_ lazy? - 1999-05-21 (jmt) + */ + +static int gIER,gIFR,gBufA,gBufB; + +/* + * On Macs with a genuine VIA chip there is no way to mask an individual slot + * interrupt. This limitation also seems to apply to VIA clone logic cores in + * Quadra-like ASICs. (RBV and OSS machines don't have this limitation.) + * + * We used to fake it by configuring the relevant VIA pin as an output + * (to mask the interrupt) or input (to unmask). That scheme did not work on + * (at least) the Quadra 700. A NuBus card's /NMRQ signal is an open-collector + * circuit (see Designing Cards and Drivers for Macintosh II and Macintosh SE, + * p. 10-11 etc) but VIA outputs are not (see datasheet). + * + * Driving these outputs high must cause the VIA to source current and the + * card to sink current when it asserts /NMRQ. Current will flow but the pin + * voltage is uncertain and so the /NMRQ condition may still cause a transition + * at the VIA2 CA1 input (which explains the lost interrupts). A side effect + * is that a disabled slot IRQ can never be tested as pending or not. + * + * Driving these outputs low doesn't work either. All the slot /NMRQ lines are + * (active low) OR'd together to generate the CA1 (aka "SLOTS") interrupt (see + * The Guide To Macintosh Family Hardware, 2nd edition p. 167). If we drive a + * disabled /NMRQ line low, the falling edge immediately triggers a CA1 + * interrupt and all slot interrupts after that will generate no transition + * and therefore no interrupt, even after being re-enabled. + * + * So we make the VIA port A I/O lines inputs and use nubus_disabled to keep + * track of their states. When any slot IRQ becomes disabled we mask the CA1 + * umbrella interrupt. Only when all slot IRQs become enabled do we unmask + * the CA1 interrupt. It must remain enabled even when cards have no interrupt + * handler registered. Drivers must therefore disable a slot interrupt at the + * device before they call free_irq (like shared and autovector interrupts). + * + * There is also a related problem when MacOS is used to boot Linux. A network + * card brought up by a MacOS driver may raise an interrupt while Linux boots. + * This can be fatal since it can't be handled until the right driver loads + * (if such a driver exists at all). Apparently related to this hardware + * limitation, "Designing Cards and Drivers", p. 9-8, says that a slot + * interrupt with no driver would crash MacOS (the book was written before + * the appearance of Macs with RBV or OSS). + */ + +static u8 nubus_disabled; + +void via_debug_dump(void); +static void via_nubus_init(void); + +/* + * Initialize the VIAs + * + * First we figure out where they actually _are_ as well as what type of + * VIA we have for VIA2 (it could be a real VIA or an RBV or even an OSS.) + * Then we pretty much clear them out and disable all IRQ sources. + */ + +void __init via_init(void) +{ + via1 = (void *)VIA1_BASE; + pr_debug("VIA1 detected at %p\n", via1); + + if (oss_present) { + via2 = NULL; + rbv_present = 0; + } else { + switch (macintosh_config->via_type) { + + /* IIci, IIsi, IIvx, IIvi (P6xx), LC series */ + + case MAC_VIA_IICI: + via2 = (void *)RBV_BASE; + pr_debug("VIA2 (RBV) detected at %p\n", via2); + rbv_present = 1; + if (macintosh_config->ident == MAC_MODEL_LCIII) { + rbv_clear = 0x00; + } else { + /* on most RBVs (& unlike the VIAs), you */ + /* need to set bit 7 when you write to IFR */ + /* in order for your clear to occur. */ + rbv_clear = 0x80; + } + gIER = rIER; + gIFR = rIFR; + gBufA = rSIFR; + gBufB = rBufB; + break; + + /* Quadra and early MacIIs agree on the VIA locations */ + + case MAC_VIA_QUADRA: + case MAC_VIA_II: + via2 = (void *) VIA2_BASE; + pr_debug("VIA2 detected at %p\n", via2); + rbv_present = 0; + rbv_clear = 0x00; + gIER = vIER; + gIFR = vIFR; + gBufA = vBufA; + gBufB = vBufB; + break; + + default: + panic("UNKNOWN VIA TYPE"); + } + } + +#ifdef DEBUG_VIA + via_debug_dump(); +#endif + + /* + * Shut down all IRQ sources, reset the timers, and + * kill the timer latch on VIA1. + */ + + via1[vIER] = 0x7F; + via1[vIFR] = 0x7F; + via1[vT1CL] = 0; + via1[vT1CH] = 0; + via1[vT2CL] = 0; + via1[vT2CH] = 0; + via1[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */ + via1[vACR] &= ~0x03; /* disable port A & B latches */ + + /* + * SE/30: disable video IRQ + */ + + if (macintosh_config->ident == MAC_MODEL_SE30) { + via1[vDirB] |= 0x40; + via1[vBufB] |= 0x40; + } + + switch (macintosh_config->adb_type) { + case MAC_ADB_IOP: + case MAC_ADB_II: + case MAC_ADB_PB1: + /* + * Set the RTC bits to a known state: all lines to outputs and + * RTC disabled (yes that's 0 to enable and 1 to disable). + */ + via1[vDirB] |= VIA1B_vRTCEnb | VIA1B_vRTCClk | VIA1B_vRTCData; + via1[vBufB] |= VIA1B_vRTCEnb | VIA1B_vRTCClk; + break; + } + + /* Everything below this point is VIA2/RBV only... */ + + if (oss_present) + return; + + if ((macintosh_config->via_type == MAC_VIA_QUADRA) && + (macintosh_config->adb_type != MAC_ADB_PB1) && + (macintosh_config->adb_type != MAC_ADB_PB2) && + (macintosh_config->ident != MAC_MODEL_C660) && + (macintosh_config->ident != MAC_MODEL_Q840)) { + via_alt_mapping = 1; + via1[vDirB] |= 0x40; + via1[vBufB] &= ~0x40; + } else { + via_alt_mapping = 0; + } + + /* + * Now initialize VIA2. For RBV we just kill all interrupts; + * for a regular VIA we also reset the timers and stuff. + */ + + via2[gIER] = 0x7F; + via2[gIFR] = 0x7F | rbv_clear; + if (!rbv_present) { + via2[vT1CL] = 0; + via2[vT1CH] = 0; + via2[vT2CL] = 0; + via2[vT2CH] = 0; + via2[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */ + via2[vACR] &= ~0x03; /* disable port A & B latches */ + } + + via_nubus_init(); + + /* Everything below this point is VIA2 only... */ + + if (rbv_present) + return; + + /* + * Set vPCR for control line interrupts. + * + * CA1 (SLOTS IRQ), CB1 (ASC IRQ): negative edge trigger. + * + * Macs with ESP SCSI have a negative edge triggered SCSI interrupt. + * Testing reveals that PowerBooks do too. However, the SE/30 + * schematic diagram shows an active high NCR5380 IRQ line. + */ + + pr_debug("VIA2 vPCR is 0x%02X\n", via2[vPCR]); + if (macintosh_config->via_type == MAC_VIA_II) { + /* CA2 (SCSI DRQ), CB2 (SCSI IRQ): indep. input, pos. edge */ + via2[vPCR] = 0x66; + } else { + /* CA2 (SCSI DRQ), CB2 (SCSI IRQ): indep. input, neg. edge */ + via2[vPCR] = 0x22; + } +} + +/* + * Debugging dump, used in various places to see what's going on. + */ + +void via_debug_dump(void) +{ + printk(KERN_DEBUG "VIA1: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n", + (uint) via1[vDirA], (uint) via1[vDirB], (uint) via1[vACR]); + printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n", + (uint) via1[vPCR], (uint) via1[vIFR], (uint) via1[vIER]); + if (!via2) + return; + if (rbv_present) { + printk(KERN_DEBUG "VIA2: IFR = 0x%02X IER = 0x%02X\n", + (uint) via2[rIFR], (uint) via2[rIER]); + printk(KERN_DEBUG " SIFR = 0x%02X SIER = 0x%02X\n", + (uint) via2[rSIFR], (uint) via2[rSIER]); + } else { + printk(KERN_DEBUG "VIA2: DDRA = 0x%02X DDRB = 0x%02X ACR = 0x%02X\n", + (uint) via2[vDirA], (uint) via2[vDirB], + (uint) via2[vACR]); + printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n", + (uint) via2[vPCR], + (uint) via2[vIFR], (uint) via2[vIER]); + } +} + +/* + * Flush the L2 cache on Macs that have it by flipping + * the system into 24-bit mode for an instant. + */ + +void via_l2_flush(int writeback) +{ + unsigned long flags; + + local_irq_save(flags); + via2[gBufB] &= ~VIA2B_vMode32; + via2[gBufB] |= VIA2B_vMode32; + local_irq_restore(flags); +} + +/* + * Initialize VIA2 for Nubus access + */ + +static void __init via_nubus_init(void) +{ + /* unlock nubus transactions */ + + if ((macintosh_config->adb_type != MAC_ADB_PB1) && + (macintosh_config->adb_type != MAC_ADB_PB2)) { + /* set the line to be an output on non-RBV machines */ + if (!rbv_present) + via2[vDirB] |= 0x02; + + /* this seems to be an ADB bit on PMU machines */ + /* according to MkLinux. -- jmt */ + via2[gBufB] |= 0x02; + } + + /* + * Disable the slot interrupts. On some hardware that's not possible. + * On some hardware it's unclear what all of these I/O lines do. + */ + + switch (macintosh_config->via_type) { + case MAC_VIA_II: + case MAC_VIA_QUADRA: + pr_debug("VIA2 vDirA is 0x%02X\n", via2[vDirA]); + break; + case MAC_VIA_IICI: + /* RBV. Disable all the slot interrupts. SIER works like IER. */ + via2[rSIER] = 0x7F; + break; + } +} + +void via_nubus_irq_startup(int irq) +{ + int irq_idx = IRQ_IDX(irq); + + switch (macintosh_config->via_type) { + case MAC_VIA_II: + case MAC_VIA_QUADRA: + /* Make the port A line an input. Probably redundant. */ + if (macintosh_config->via_type == MAC_VIA_II) { + /* The top two bits are RAM size outputs. */ + via2[vDirA] &= 0xC0 | ~(1 << irq_idx); + } else { + /* Allow NuBus slots 9 through F. */ + via2[vDirA] &= 0x80 | ~(1 << irq_idx); + } + fallthrough; + case MAC_VIA_IICI: + via_irq_enable(irq); + break; + } +} + +void via_nubus_irq_shutdown(int irq) +{ + switch (macintosh_config->via_type) { + case MAC_VIA_II: + case MAC_VIA_QUADRA: + /* Ensure that the umbrella CA1 interrupt remains enabled. */ + via_irq_enable(irq); + break; + case MAC_VIA_IICI: + via_irq_disable(irq); + break; + } +} + +/* + * The generic VIA interrupt routines (shamelessly stolen from Alan Cox's + * via6522.c :-), disable/pending masks added. + */ + +#define VIA_TIMER_1_INT BIT(6) + +void via1_irq(struct irq_desc *desc) +{ + int irq_num; + unsigned char irq_bit, events; + + events = via1[vIFR] & via1[vIER] & 0x7F; + if (!events) + return; + + irq_num = IRQ_MAC_TIMER_1; + irq_bit = VIA_TIMER_1_INT; + if (events & irq_bit) { + unsigned long flags; + + local_irq_save(flags); + via1[vIFR] = irq_bit; + generic_handle_irq(irq_num); + local_irq_restore(flags); + + events &= ~irq_bit; + if (!events) + return; + } + + irq_num = VIA1_SOURCE_BASE; + irq_bit = 1; + do { + if (events & irq_bit) { + via1[vIFR] = irq_bit; + generic_handle_irq(irq_num); + } + ++irq_num; + irq_bit <<= 1; + } while (events >= irq_bit); +} + +static void via2_irq(struct irq_desc *desc) +{ + int irq_num; + unsigned char irq_bit, events; + + events = via2[gIFR] & via2[gIER] & 0x7F; + if (!events) + return; + + irq_num = VIA2_SOURCE_BASE; + irq_bit = 1; + do { + if (events & irq_bit) { + via2[gIFR] = irq_bit | rbv_clear; + generic_handle_irq(irq_num); + } + ++irq_num; + irq_bit <<= 1; + } while (events >= irq_bit); +} + +/* + * Dispatch Nubus interrupts. We are called as a secondary dispatch by the + * VIA2 dispatcher as a fast interrupt handler. + */ + +static void via_nubus_irq(struct irq_desc *desc) +{ + int slot_irq; + unsigned char slot_bit, events; + + events = ~via2[gBufA] & 0x7F; + if (rbv_present) + events &= via2[rSIER]; + else + events &= ~via2[vDirA]; + if (!events) + return; + + do { + slot_irq = IRQ_NUBUS_F; + slot_bit = 0x40; + do { + if (events & slot_bit) { + events &= ~slot_bit; + generic_handle_irq(slot_irq); + } + --slot_irq; + slot_bit >>= 1; + } while (events); + + /* clear the CA1 interrupt and make certain there's no more. */ + via2[gIFR] = 0x02 | rbv_clear; + events = ~via2[gBufA] & 0x7F; + if (rbv_present) + events &= via2[rSIER]; + else + events &= ~via2[vDirA]; + } while (events); +} + +/* + * Register the interrupt dispatchers for VIA or RBV machines only. + */ + +void __init via_register_interrupts(void) +{ + if (via_alt_mapping) { + /* software interrupt */ + irq_set_chained_handler(IRQ_AUTO_1, via1_irq); + /* via1 interrupt */ + irq_set_chained_handler(IRQ_AUTO_6, via1_irq); + } else { + irq_set_chained_handler(IRQ_AUTO_1, via1_irq); + } + irq_set_chained_handler(IRQ_AUTO_2, via2_irq); + irq_set_chained_handler(IRQ_MAC_NUBUS, via_nubus_irq); +} + +void via_irq_enable(int irq) { + int irq_src = IRQ_SRC(irq); + int irq_idx = IRQ_IDX(irq); + + if (irq_src == 1) { + via1[vIER] = IER_SET_BIT(irq_idx); + } else if (irq_src == 2) { + if (irq != IRQ_MAC_NUBUS || nubus_disabled == 0) + via2[gIER] = IER_SET_BIT(irq_idx); + } else if (irq_src == 7) { + switch (macintosh_config->via_type) { + case MAC_VIA_II: + case MAC_VIA_QUADRA: + nubus_disabled &= ~(1 << irq_idx); + /* Enable the CA1 interrupt when no slot is disabled. */ + if (!nubus_disabled) + via2[gIER] = IER_SET_BIT(1); + break; + case MAC_VIA_IICI: + /* On RBV, enable the slot interrupt. + * SIER works like IER. + */ + via2[rSIER] = IER_SET_BIT(irq_idx); + break; + } + } +} + +void via_irq_disable(int irq) { + int irq_src = IRQ_SRC(irq); + int irq_idx = IRQ_IDX(irq); + + if (irq_src == 1) { + via1[vIER] = IER_CLR_BIT(irq_idx); + } else if (irq_src == 2) { + via2[gIER] = IER_CLR_BIT(irq_idx); + } else if (irq_src == 7) { + switch (macintosh_config->via_type) { + case MAC_VIA_II: + case MAC_VIA_QUADRA: + nubus_disabled |= 1 << irq_idx; + if (nubus_disabled) + via2[gIER] = IER_CLR_BIT(1); + break; + case MAC_VIA_IICI: + via2[rSIER] = IER_CLR_BIT(irq_idx); + break; + } + } +} + +void via1_set_head(int head) +{ + if (head == 0) + via1[vBufA] &= ~VIA1A_vHeadSel; + else + via1[vBufA] |= VIA1A_vHeadSel; +} +EXPORT_SYMBOL(via1_set_head); + +int via2_scsi_drq_pending(void) +{ + return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ)); +} +EXPORT_SYMBOL(via2_scsi_drq_pending); + +/* timer and clock source */ + +#define VIA_CLOCK_FREQ 783360 /* VIA "phase 2" clock in Hz */ +#define VIA_TIMER_CYCLES (VIA_CLOCK_FREQ / HZ) /* clock cycles per jiffy */ + +#define VIA_TC (VIA_TIMER_CYCLES - 2) /* including 0 and -1 */ +#define VIA_TC_LOW (VIA_TC & 0xFF) +#define VIA_TC_HIGH (VIA_TC >> 8) + +static u64 mac_read_clk(struct clocksource *cs); + +static struct clocksource mac_clk = { + .name = "via1", + .rating = 250, + .read = mac_read_clk, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static u32 clk_total, clk_offset; + +static irqreturn_t via_timer_handler(int irq, void *dev_id) +{ + clk_total += VIA_TIMER_CYCLES; + clk_offset = 0; + legacy_timer_tick(1); + + return IRQ_HANDLED; +} + +void __init via_init_clock(void) +{ + if (request_irq(IRQ_MAC_TIMER_1, via_timer_handler, IRQF_TIMER, "timer", + NULL)) { + pr_err("Couldn't register %s interrupt\n", "timer"); + return; + } + + via1[vT1CL] = VIA_TC_LOW; + via1[vT1CH] = VIA_TC_HIGH; + via1[vACR] |= 0x40; + + clocksource_register_hz(&mac_clk, VIA_CLOCK_FREQ); +} + +static u64 mac_read_clk(struct clocksource *cs) +{ + unsigned long flags; + u8 count_high; + u16 count; + u32 ticks; + + /* + * Timer counter wrap-around is detected with the timer interrupt flag + * but reading the counter low byte (vT1CL) would reset the flag. + * Also, accessing both counter registers is essentially a data race. + * These problems are avoided by ignoring the low byte. Clock accuracy + * is 256 times worse (error can reach 0.327 ms) but CPU overhead is + * reduced by avoiding slow VIA register accesses. + */ + + local_irq_save(flags); + count_high = via1[vT1CH]; + if (count_high == 0xFF) + count_high = 0; + if (count_high > 0 && (via1[vIFR] & VIA_TIMER_1_INT)) + clk_offset = VIA_TIMER_CYCLES; + count = count_high << 8; + ticks = VIA_TIMER_CYCLES - count; + ticks += clk_offset + clk_total; + local_irq_restore(flags); + + return ticks; +} |