Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/m68k/mac/Makefile b/arch/m68k/mac/Makefile
index b8d4c83..aa0eae5 100644
--- a/arch/m68k/mac/Makefile
+++ b/arch/m68k/mac/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for Linux arch/m68k/mac source directory
#
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index cd9317d..611f73b 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -54,8 +54,6 @@
/* The phys. video addr. - might be bogus on some machines */
static unsigned long mac_orig_videoaddr;
-/* Mac specific timer functions */
-extern u32 mac_gettimeoffset(void);
extern int mac_hwclk(int, struct rtc_time *);
extern void iop_preinit(void);
extern void iop_init(void);
@@ -155,7 +153,6 @@
mach_sched_init = mac_sched_init;
mach_init_IRQ = mac_init_IRQ;
mach_get_model = mac_get_model;
- arch_gettimeoffset = mac_gettimeoffset;
mach_hwclk = mac_hwclk;
mach_reset = mac_reset;
mach_halt = mac_poweroff;
@@ -212,7 +209,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_IWM,
+ .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* IWM */
},
/*
@@ -227,7 +224,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_IWM,
+ .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* IWM */
}, {
.ident = MAC_MODEL_IIX,
.name = "IIx",
@@ -236,7 +233,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_IICX,
.name = "IIcx",
@@ -245,7 +242,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_SE30,
.name = "SE/30",
@@ -254,7 +251,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
},
/*
@@ -272,7 +269,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_IIFX,
.name = "IIfx",
@@ -281,7 +278,7 @@
.scsi_type = MAC_SCSI_IIFX,
.scc_type = MAC_SCC_IOP,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_IOP,
+ .floppy_type = MAC_FLOPPY_SWIM_IOP, /* SWIM */
}, {
.ident = MAC_MODEL_IISI,
.name = "IIsi",
@@ -290,7 +287,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_IIVI,
.name = "IIvi",
@@ -299,7 +296,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM */
}, {
.ident = MAC_MODEL_IIVX,
.name = "IIvx",
@@ -308,7 +305,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM */
},
/*
@@ -322,7 +319,7 @@
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM */
}, {
.ident = MAC_MODEL_CCL,
.name = "Color Classic",
@@ -331,7 +328,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
}, {
.ident = MAC_MODEL_CCLII,
.name = "Color Classic II",
@@ -340,7 +337,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
},
/*
@@ -355,7 +352,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM */
}, {
.ident = MAC_MODEL_LCII,
.name = "LC II",
@@ -364,7 +361,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM */
}, {
.ident = MAC_MODEL_LCIII,
.name = "LC III",
@@ -373,7 +370,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
},
/*
@@ -394,7 +391,7 @@
.scsi_type = MAC_SCSI_QUADRA,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_Q605_ACC,
.name = "Quadra 605",
@@ -403,7 +400,7 @@
.scsi_type = MAC_SCSI_QUADRA,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_Q610,
.name = "Quadra 610",
@@ -413,7 +410,7 @@
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_Q630,
.name = "Quadra 630",
@@ -423,7 +420,7 @@
.ide_type = MAC_IDE_QUADRA,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_PDS_COMM,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_Q650,
.name = "Quadra 650",
@@ -433,7 +430,7 @@
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
},
/* The Q700 does have a NS Sonic */
{
@@ -445,7 +442,7 @@
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM */
}, {
.ident = MAC_MODEL_Q800,
.name = "Quadra 800",
@@ -455,7 +452,7 @@
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_Q840,
.name = "Quadra 840AV",
@@ -465,7 +462,7 @@
.scc_type = MAC_SCC_PSC,
.ether_type = MAC_ETHER_MACE,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_AV,
+ .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* New Age */
}, {
.ident = MAC_MODEL_Q900,
.name = "Quadra 900",
@@ -475,7 +472,7 @@
.scc_type = MAC_SCC_IOP,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_IOP,
+ .floppy_type = MAC_FLOPPY_SWIM_IOP, /* SWIM */
}, {
.ident = MAC_MODEL_Q950,
.name = "Quadra 950",
@@ -485,7 +482,7 @@
.scc_type = MAC_SCC_IOP,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_IOP,
+ .floppy_type = MAC_FLOPPY_SWIM_IOP, /* SWIM */
},
/*
@@ -500,7 +497,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
}, {
.ident = MAC_MODEL_P475,
.name = "Performa 475",
@@ -509,7 +506,7 @@
.scsi_type = MAC_SCSI_QUADRA,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_P475F,
.name = "Performa 475",
@@ -518,7 +515,7 @@
.scsi_type = MAC_SCSI_QUADRA,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_P520,
.name = "Performa 520",
@@ -527,7 +524,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
}, {
.ident = MAC_MODEL_P550,
.name = "Performa 550",
@@ -536,7 +533,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
},
/* These have the comm slot, and therefore possibly SONIC ethernet */
{
@@ -547,7 +544,7 @@
.scsi_type = MAC_SCSI_QUADRA,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS_COMM,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_P588,
.name = "Performa 588",
@@ -557,7 +554,7 @@
.ide_type = MAC_IDE_QUADRA,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_PDS_COMM,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_TV,
.name = "TV",
@@ -565,7 +562,7 @@
.via_type = MAC_VIA_IICI,
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM 2 */
}, {
.ident = MAC_MODEL_P600,
.name = "Performa 600",
@@ -574,7 +571,7 @@
.scsi_type = MAC_SCSI_LC,
.scc_type = MAC_SCC_II,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_LC, /* SWIM */
},
/*
@@ -591,7 +588,7 @@
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_C650,
.name = "Centris 650",
@@ -601,7 +598,7 @@
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR1,
+ .floppy_type = MAC_FLOPPY_QUADRA, /* SWIM 2 */
}, {
.ident = MAC_MODEL_C660,
.name = "Centris 660AV",
@@ -611,7 +608,7 @@
.scc_type = MAC_SCC_PSC,
.ether_type = MAC_ETHER_MACE,
.expansion_type = MAC_EXP_PDS_NUBUS,
- .floppy_type = MAC_FLOPPY_AV,
+ .floppy_type = MAC_FLOPPY_UNSUPPORTED, /* New Age */
},
/*
@@ -627,7 +624,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB145,
.name = "PowerBook 145",
@@ -635,7 +632,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB150,
.name = "PowerBook 150",
@@ -644,7 +641,7 @@
.scsi_type = MAC_SCSI_OLD,
.ide_type = MAC_IDE_PB,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB160,
.name = "PowerBook 160",
@@ -652,7 +649,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB165,
.name = "PowerBook 165",
@@ -660,7 +657,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB165C,
.name = "PowerBook 165c",
@@ -668,7 +665,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB170,
.name = "PowerBook 170",
@@ -676,7 +673,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB180,
.name = "PowerBook 180",
@@ -684,7 +681,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB180C,
.name = "PowerBook 180c",
@@ -692,7 +689,7 @@
.via_type = MAC_VIA_QUADRA,
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB190,
.name = "PowerBook 190",
@@ -701,7 +698,7 @@
.scsi_type = MAC_SCSI_OLD,
.ide_type = MAC_IDE_BABOON,
.scc_type = MAC_SCC_QUADRA,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM 2 */
}, {
.ident = MAC_MODEL_PB520,
.name = "PowerBook 520",
@@ -710,7 +707,7 @@
.scsi_type = MAC_SCSI_OLD,
.scc_type = MAC_SCC_QUADRA,
.ether_type = MAC_ETHER_SONIC,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM 2 */
},
/*
@@ -727,7 +724,7 @@
.scsi_type = MAC_SCSI_DUO,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB230,
.name = "PowerBook Duo 230",
@@ -736,7 +733,7 @@
.scsi_type = MAC_SCSI_DUO,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB250,
.name = "PowerBook Duo 250",
@@ -745,7 +742,7 @@
.scsi_type = MAC_SCSI_DUO,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB270C,
.name = "PowerBook Duo 270c",
@@ -754,7 +751,7 @@
.scsi_type = MAC_SCSI_DUO,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB280,
.name = "PowerBook Duo 280",
@@ -763,7 +760,7 @@
.scsi_type = MAC_SCSI_DUO,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
}, {
.ident = MAC_MODEL_PB280C,
.name = "PowerBook Duo 280c",
@@ -772,7 +769,7 @@
.scsi_type = MAC_SCSI_DUO,
.scc_type = MAC_SCC_QUADRA,
.expansion_type = MAC_EXP_NUBUS,
- .floppy_type = MAC_FLOPPY_SWIM_ADDR2,
+ .floppy_type = MAC_FLOPPY_OLD, /* SWIM */
},
/*
@@ -914,6 +911,10 @@
.flags = IORESOURCE_MEM,
.start = 0x50008000,
.end = 0x50009FFF,
+ }, {
+ .flags = IORESOURCE_MEM,
+ .start = 0x50008000,
+ .end = 0x50009FFF,
},
};
@@ -959,7 +960,7 @@
int __init mac_platform_init(void)
{
- u8 *swim_base;
+ phys_addr_t swim_base = 0;
if (!MACH_IS_MAC)
return -ENODEV;
@@ -976,22 +977,22 @@
*/
switch (macintosh_config->floppy_type) {
- case MAC_FLOPPY_SWIM_ADDR1:
- swim_base = (u8 *)(VIA1_BASE + 0x1E000);
+ case MAC_FLOPPY_QUADRA:
+ swim_base = 0x5001E000;
break;
- case MAC_FLOPPY_SWIM_ADDR2:
- swim_base = (u8 *)(VIA1_BASE + 0x16000);
+ case MAC_FLOPPY_OLD:
+ swim_base = 0x50016000;
break;
- default:
- swim_base = NULL;
+ case MAC_FLOPPY_LC:
+ swim_base = 0x50F16000;
break;
}
if (swim_base) {
struct resource swim_rsrc = {
.flags = IORESOURCE_MEM,
- .start = (resource_size_t)swim_base,
- .end = (resource_size_t)swim_base + 0x1FFF,
+ .start = swim_base,
+ .end = swim_base + 0x1FFF,
};
platform_device_register_simple("swim", -1, &swim_rsrc, 1);
@@ -1015,10 +1016,12 @@
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 SCSI DMA custom IC embeds the 53C80 core. mac_scsi does
- * not make use of its DMA or hardware handshaking logic.
+ * 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));
diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c
index 1b083c5..90f4e9c 100644
--- a/arch/m68k/mac/misc.c
+++ b/arch/m68k/mac/misc.c
@@ -36,37 +36,9 @@
static void (*rom_reset)(void);
+#if IS_ENABLED(CONFIG_NVRAM)
#ifdef CONFIG_ADB_CUDA
-static time64_t cuda_read_time(void)
-{
- struct adb_request req;
- time64_t time;
-
- if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
- return 0;
- while (!req.complete)
- cuda_poll();
-
- time = (u32)((req.reply[3] << 24) | (req.reply[4] << 16) |
- (req.reply[5] << 8) | req.reply[6]);
-
- return time - RTC_OFFSET;
-}
-
-static void cuda_write_time(time64_t time)
-{
- struct adb_request req;
- u32 data = lower_32_bits(time + RTC_OFFSET);
-
- if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
- (data >> 24) & 0xFF, (data >> 16) & 0xFF,
- (data >> 8) & 0xFF, data & 0xFF) < 0)
- return;
- while (!req.complete)
- cuda_poll();
-}
-
-static __u8 cuda_read_pram(int offset)
+static unsigned char cuda_pram_read_byte(int offset)
{
struct adb_request req;
@@ -78,7 +50,7 @@
return req.reply[3];
}
-static void cuda_write_pram(int offset, __u8 data)
+static void cuda_pram_write_byte(unsigned char data, int offset)
{
struct adb_request req;
@@ -91,56 +63,29 @@
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
-static time64_t pmu_read_time(void)
+static unsigned char pmu_pram_read_byte(int offset)
{
struct adb_request req;
- time64_t time;
- if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
+ if (pmu_request(&req, NULL, 3, PMU_READ_XPRAM,
+ offset & 0xFF, 1) < 0)
return 0;
pmu_wait_complete(&req);
- time = (u32)((req.reply[0] << 24) | (req.reply[1] << 16) |
- (req.reply[2] << 8) | req.reply[3]);
-
- return time - RTC_OFFSET;
+ return req.reply[0];
}
-static void pmu_write_time(time64_t time)
+static void pmu_pram_write_byte(unsigned char data, int offset)
{
struct adb_request req;
- u32 data = lower_32_bits(time + RTC_OFFSET);
- if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
- (data >> 24) & 0xFF, (data >> 16) & 0xFF,
- (data >> 8) & 0xFF, data & 0xFF) < 0)
+ if (pmu_request(&req, NULL, 4, PMU_WRITE_XPRAM,
+ offset & 0xFF, 1, data) < 0)
return;
pmu_wait_complete(&req);
}
-
-static __u8 pmu_read_pram(int offset)
-{
- struct adb_request req;
-
- if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
- (offset >> 8) & 0xFF, offset & 0xFF) < 0)
- return 0;
- while (!req.complete)
- pmu_poll();
- return req.reply[3];
-}
-
-static void pmu_write_pram(int offset, __u8 data)
-{
- struct adb_request req;
-
- if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
- (offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
- return;
- while (!req.complete)
- pmu_poll();
-}
#endif /* CONFIG_ADB_PMU */
+#endif /* CONFIG_NVRAM */
/*
* VIA PRAM/RTC access routines
@@ -149,7 +94,7 @@
* the RTC should be enabled.
*/
-static __u8 via_pram_readbyte(void)
+static __u8 via_rtc_recv(void)
{
int i, reg;
__u8 data;
@@ -176,7 +121,7 @@
return data;
}
-static void via_pram_writebyte(__u8 data)
+static void via_rtc_send(__u8 data)
{
int i, reg, bit;
@@ -193,6 +138,31 @@
}
/*
+ * 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
@@ -201,29 +171,33 @@
* This function disables all interrupts while running.
*/
-static void via_pram_command(int command, __u8 *data)
+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_pram_writebyte((command & 0xFF00) >> 8);
- via_pram_writebyte(command & 0xFF);
- is_read = command & 0x8000;
+ via_rtc_send((command & 0xFF00) >> 8);
+ via_rtc_send(command & 0xFF);
+ is_read = command & (RTC_FLG_READ << 8);
} else { /* one-byte command */
- via_pram_writebyte(command);
- is_read = command & 0x80;
+ via_rtc_send(command);
+ is_read = command & RTC_FLG_READ;
}
if (is_read) {
- *data = via_pram_readbyte();
+ *data = via_rtc_recv();
} else {
- via_pram_writebyte(*data);
+ via_rtc_send(*data);
}
/* All done, disable the RTC */
@@ -233,14 +207,30 @@
local_irq_restore(flags);
}
-static __u8 via_read_pram(int offset)
+#if IS_ENABLED(CONFIG_NVRAM)
+static unsigned char via_pram_read_byte(int offset)
{
- return 0;
+ unsigned char temp;
+
+ via_rtc_command(RTC_CMD_XPRAM_READ | RTC_CMD_XPRAM_ARG(offset), &temp);
+
+ return temp;
}
-static void via_write_pram(int offset, __u8 data)
+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.
@@ -257,10 +247,10 @@
} result, last_result;
int count = 1;
- via_pram_command(0x81, &last_result.cdata[3]);
- via_pram_command(0x85, &last_result.cdata[2]);
- via_pram_command(0x89, &last_result.cdata[1]);
- via_pram_command(0x8D, &last_result.cdata[0]);
+ 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
@@ -268,10 +258,14 @@
*/
while (1) {
- via_pram_command(0x81, &result.cdata[3]);
- via_pram_command(0x85, &result.cdata[2]);
- via_pram_command(0x89, &result.cdata[1]);
- via_pram_command(0x8D, &result.cdata[0]);
+ 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;
@@ -295,29 +289,33 @@
* is basically any machine with Mac II-style ADB.
*/
-static void via_write_time(time64_t time)
+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_pram_command(0x35, &temp);
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp);
data.idata = lower_32_bits(time + RTC_OFFSET);
- via_pram_command(0x01, &data.cdata[3]);
- via_pram_command(0x05, &data.cdata[2]);
- via_pram_command(0x09, &data.cdata[1]);
- via_pram_command(0x0D, &data.cdata[0]);
+ 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 = 0xD5;
- via_pram_command(0x35, &temp);
+ temp = 0x55 | RTC_FLG_WRITE_PROTECT;
+ via_rtc_command(RTC_CMD_WRITE(RTC_REG_WRITE_PROTECT), &temp);
}
static void via_shutdown(void)
@@ -378,66 +376,58 @@
*-------------------------------------------------------------------
*/
-void mac_pram_read(int offset, __u8 *buffer, int len)
+#if IS_ENABLED(CONFIG_NVRAM)
+unsigned char mac_pram_read_byte(int addr)
{
- __u8 (*func)(int);
- int i;
-
switch (macintosh_config->adb_type) {
case MAC_ADB_IOP:
case MAC_ADB_II:
case MAC_ADB_PB1:
- func = via_read_pram;
- break;
+ return via_pram_read_byte(addr);
#ifdef CONFIG_ADB_CUDA
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
- func = cuda_read_pram;
- break;
+ return cuda_pram_read_byte(addr);
#endif
#ifdef CONFIG_ADB_PMU
case MAC_ADB_PB2:
- func = pmu_read_pram;
- break;
+ return pmu_pram_read_byte(addr);
#endif
default:
- return;
- }
- for (i = 0 ; i < len ; i++) {
- buffer[i] = (*func)(offset++);
+ return 0xFF;
}
}
-void mac_pram_write(int offset, __u8 *buffer, int len)
+void mac_pram_write_byte(unsigned char val, int addr)
{
- void (*func)(int, __u8);
- int i;
-
switch (macintosh_config->adb_type) {
case MAC_ADB_IOP:
case MAC_ADB_II:
case MAC_ADB_PB1:
- func = via_write_pram;
+ via_pram_write_byte(val, addr);
break;
#ifdef CONFIG_ADB_CUDA
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
- func = cuda_write_pram;
+ cuda_pram_write_byte(val, addr);
break;
#endif
#ifdef CONFIG_ADB_PMU
case MAC_ADB_PB2:
- func = pmu_write_pram;
+ pmu_pram_write_byte(val, addr);
break;
#endif
default:
- return;
- }
- for (i = 0 ; i < len ; i++) {
- (*func)(offset++, buffer[i]);
+ break;
}
}
+ssize_t mac_pram_get_size(void)
+{
+ return 256;
+}
+#endif /* CONFIG_NVRAM */
+
void mac_poweroff(void)
{
if (oss_present) {
@@ -462,9 +452,8 @@
void mac_reset(void)
{
- if (macintosh_config->adb_type == MAC_ADB_II) {
- unsigned long flags;
-
+ 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 !! */
@@ -474,17 +463,8 @@
/* works on some */
rom_reset = (void *) (mac_bi_data.rombase + 0xa);
- if (macintosh_config->ident == MAC_MODEL_SE30) {
- /*
- * MSch: Machines known to crash on ROM reset ...
- */
- } else {
- local_irq_save(flags);
-
- rom_reset();
-
- local_irq_restore(flags);
- }
+ 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) {
@@ -641,12 +621,12 @@
#ifdef CONFIG_ADB_CUDA
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
- now = cuda_read_time();
+ now = cuda_get_time();
break;
#endif
#ifdef CONFIG_ADB_PMU
case MAC_ADB_PB2:
- now = pmu_read_time();
+ now = pmu_get_time();
break;
#endif
default:
@@ -657,32 +637,25 @@
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 %04d-%02d-%-2d %02d:%02d:%02d\n",
- __func__, t->tm_year + 1900, t->tm_mon + 1, 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 %04d-%02d-%-2d %02d:%02d:%02d\n",
- __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
- t->tm_hour, t->tm_min, t->tm_sec);
-
- now = mktime64(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
- t->tm_hour, t->tm_min, t->tm_sec);
+ 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_write_time(now);
+ via_set_rtc_time(t);
break;
#ifdef CONFIG_ADB_CUDA
case MAC_ADB_EGRET:
case MAC_ADB_CUDA:
- cuda_write_time(now);
+ cuda_set_rtc_time(t);
break;
#endif
#ifdef CONFIG_ADB_PMU
case MAC_ADB_PB2:
- pmu_write_time(now);
+ pmu_set_rtc_time(t);
break;
#endif
default:
diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
index 8d547df..0d0965b 100644
--- a/arch/m68k/mac/psc.c
+++ b/arch/m68k/mac/psc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Apple Peripheral System Controller (PSC)
*
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index acdabbe..3c2cfcb 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -23,6 +23,7 @@
*
*/
+#include <linux/clocksource.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
@@ -55,16 +56,6 @@
static int gIER,gIFR,gBufA,gBufB;
/*
- * Timer defs.
- */
-
-#define TICK_SIZE 10000
-#define MAC_CLOCK_TICK (783300/HZ) /* ticks per HZ */
-#define MAC_CLOCK_LOW (MAC_CLOCK_TICK&0xFF)
-#define MAC_CLOCK_HIGH (MAC_CLOCK_TICK>>8)
-
-
-/*
* 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.)
@@ -189,7 +180,6 @@
/*
* SE/30: disable video IRQ
- * XXX: testing for SE/30 VBL
*/
if (macintosh_config->ident == MAC_MODEL_SE30) {
@@ -197,13 +187,18 @@
via1[vBufB] |= 0x40;
}
- /*
- * 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);
+ 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... */
@@ -268,22 +263,6 @@
}
/*
- * Start the 100 Hz clock
- */
-
-void __init via_init_clock(irq_handler_t func)
-{
- via1[vACR] |= 0x40;
- via1[vT1LL] = MAC_CLOCK_LOW;
- via1[vT1LH] = MAC_CLOCK_HIGH;
- via1[vT1CL] = MAC_CLOCK_LOW;
- via1[vT1CH] = MAC_CLOCK_HIGH;
-
- if (request_irq(IRQ_MAC_TIMER_1, func, 0, "timer", func))
- pr_err("Couldn't register %s interrupt\n", "timer");
-}
-
-/*
* Debugging dump, used in various places to see what's going on.
*/
@@ -311,29 +290,6 @@
}
/*
- * This is always executed with interrupts disabled.
- *
- * TBI: get time offset between scheduling timer ticks
- */
-
-u32 mac_gettimeoffset(void)
-{
- unsigned long ticks, offset = 0;
-
- /* read VIA1 timer 2 current value */
- ticks = via1[vT1CL] | (via1[vT1CH] << 8);
- /* The probability of underflow is less than 2% */
- if (ticks > MAC_CLOCK_TICK - MAC_CLOCK_TICK / 50)
- /* Check for pending timer interrupt in VIA1 IFR */
- if (via1[vIFR] & 0x40) offset = TICK_SIZE;
-
- ticks = MAC_CLOCK_TICK - ticks;
- ticks = ticks * 10000L / MAC_CLOCK_TICK;
-
- return (ticks + offset) * 1000;
-}
-
-/*
* Flush the L2 cache on Macs that have it by flipping
* the system into 24-bit mode for an instant.
*/
@@ -436,6 +392,8 @@
* via6522.c :-), disable/pending masks added.
*/
+#define VIA_TIMER_1_INT BIT(6)
+
void via1_irq(struct irq_desc *desc)
{
int irq_num;
@@ -445,6 +403,21 @@
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 {
@@ -601,3 +574,82 @@
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)
+{
+ irq_handler_t timer_routine = dev_id;
+
+ clk_total += VIA_TIMER_CYCLES;
+ clk_offset = 0;
+ timer_routine(0, NULL);
+
+ return IRQ_HANDLED;
+}
+
+void __init via_init_clock(irq_handler_t timer_routine)
+{
+ if (request_irq(IRQ_MAC_TIMER_1, via_timer_handler, IRQF_TIMER, "timer",
+ timer_routine)) {
+ pr_err("Couldn't register %s interrupt\n", "timer");
+ return;
+ }
+
+ via1[vT1LL] = VIA_TC_LOW;
+ via1[vT1LH] = VIA_TC_HIGH;
+ 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;
+}