^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 1996 Linus Torvalds & author (see below)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/blkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/ide.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define DRV_NAME "dtc2278"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Changing this #undef to #define may solve start up problems in some systems.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #undef ALWAYS_SET_DTC2278_PIO_MODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * From: andy@cercle.cts.com (Dyan Wile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Below is a patch for DTC-2278 - alike software-programmable controllers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * The code enables the secondary IDE controller and the PIO4 (3?) timings on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * the primary (EIDE). You may probably have to enable the 32-bit support to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * get the full speed. You better get the disk interrupts disabled ( hdparm -u0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * filesystem corrupted with -u1, but under heavy disk load only :-)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * This card is now forced to use the "serialize" feature,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * and irq-unmasking is disallowed. If io_32bit is enabled,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * it must be done for BOTH drives on each interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * This code was written for the DTC2278E, but might work with any of these:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * DTC2278S has only a single IDE interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * DTC2278D has two IDE interfaces and is otherwise identical to the S version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * DTC2278E also has serial ports and a printer port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * There may be a fourth controller type. The S and D versions use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * Winbond chip, and I think the E version does also.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static void sub22 (char b, char c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) for(i = 0; i < 3; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) inb(0x3f6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) outb_p(b,0xb0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) inb(0x3f6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) outb_p(c,0xb4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) inb(0x3f6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if(inb(0xb4) == c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) outb_p(7,0xb0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) inb(0x3f6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return; /* success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static DEFINE_SPINLOCK(dtc2278_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void dtc2278_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (drive->pio_mode >= XFER_PIO_3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) spin_lock_irqsave(&dtc2278_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * This enables PIO mode4 (3?) on the first interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) sub22(1,0xc3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) sub22(0,0xa0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) spin_unlock_irqrestore(&dtc2278_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* we don't know how to set it back again.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /* Actually we do - there is a data sheet available for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) Winbond but does anyone actually care */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static const struct ide_port_ops dtc2278_port_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .set_pio_mode = dtc2278_set_pio_mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static const struct ide_port_info dtc2278_port_info __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .name = DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .chipset = ide_dtc2278,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .port_ops = &dtc2278_port_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .host_flags = IDE_HFLAG_SERIALIZE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) IDE_HFLAG_NO_UNMASK_IRQS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) IDE_HFLAG_IO_32BIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* disallow ->io_32bit changes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) IDE_HFLAG_NO_IO_32BIT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) IDE_HFLAG_NO_DMA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) IDE_HFLAG_DTC2278,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .pio_mask = ATA_PIO4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int __init dtc2278_probe(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * This enables the second interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) outb_p(4,0xb0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) inb(0x3f6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) outb_p(0x20,0xb4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) inb(0x3f6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #ifdef ALWAYS_SET_DTC2278_PIO_MODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * This enables PIO mode4 (3?) on the first interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * and may solve start-up problems for some people.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) sub22(1,0xc3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) sub22(0,0xa0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return ide_legacy_device_add(&dtc2278_port_info, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) static bool probe_dtc2278;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) module_param_named(probe, probe_dtc2278, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int __init dtc2278_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (probe_dtc2278 == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (dtc2278_probe()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) printk(KERN_ERR "dtc2278: ide interfaces already in use!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) module_init(dtc2278_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) MODULE_AUTHOR("See Local File");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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