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| author | Petr Cvek <petr.cvek@tul.cz> | 2008-02-06 01:37:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:08 -0800 |
| commit | f63fd7e299ee13da071ecfce2b90b58c5e1562b1 (patch) | |
| tree | d62d0462c4ff6e6008c39b49e3de8498c69b7dbe /drivers/parport | |
| parent | a9000d037d7dd08ac46168560b3a3d3bb743bfa6 (diff) | |
| download | lwn-f63fd7e299ee13da071ecfce2b90b58c5e1562b1.tar.gz lwn-f63fd7e299ee13da071ecfce2b90b58c5e1562b1.zip | |
parport_pc: detection for SuperIO IT87XX POST
Add detection for IT87XX SuperIO chip and disabling its POST feature, which
made noise on parallel port's pins.
Signed-off-by: Petr Cvek <petr.cvek@tul.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/parport')
| -rw-r--r-- | drivers/parport/parport_pc.c | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index db26b4017bc1..238628d3a854 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -1540,6 +1540,38 @@ static void __devinit detect_and_report_smsc (void) smsc_check(0x3f0,0x44); smsc_check(0x370,0x44); } + +static void __devinit detect_and_report_it87(void) +{ + u16 dev; + u8 r; + if (verbose_probing) + printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n"); + if (!request_region(0x2e, 1, __FUNCTION__)) + return; + outb(0x87, 0x2e); + outb(0x01, 0x2e); + outb(0x55, 0x2e); + outb(0x55, 0x2e); + outb(0x20, 0x2e); + dev = inb(0x2f) << 8; + outb(0x21, 0x2e); + dev |= inb(0x2f); + if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 || + dev == 0x8716 || dev == 0x8718 || dev == 0x8726) { + printk(KERN_INFO "IT%04X SuperIO detected.\n", dev); + outb(0x07, 0x2E); /* Parallel Port */ + outb(0x03, 0x2F); + outb(0xF0, 0x2E); /* BOOT 0x80 off */ + r = inb(0x2f); + outb(0xF0, 0x2E); + outb(r | 8, 0x2F); + outb(0x02, 0x2E); /* Lock */ + outb(0x02, 0x2F); + + release_region(0x2e, 1); + } +} #endif /* CONFIG_PARPORT_PC_SUPERIO */ static int get_superio_dma (struct parport *p) @@ -3164,24 +3196,25 @@ static void __init parport_pc_find_ports (int autoirq, int autodma) int count = 0, err; #ifdef CONFIG_PARPORT_PC_SUPERIO - detect_and_report_winbond (); - detect_and_report_smsc (); + detect_and_report_it87(); + detect_and_report_winbond(); + detect_and_report_smsc(); #endif /* Onboard SuperIO chipsets that show themselves on the PCI bus. */ - count += parport_pc_init_superio (autoirq, autodma); + count += parport_pc_init_superio(autoirq, autodma); /* PnP ports, skip detection if SuperIO already found them */ if (!count) { - err = pnp_register_driver (&parport_pc_pnp_driver); + err = pnp_register_driver(&parport_pc_pnp_driver); if (!err) pnp_registered_parport = 1; } /* ISA ports and whatever (see asm/parport.h). */ - parport_pc_find_nonpci_ports (autoirq, autodma); + parport_pc_find_nonpci_ports(autoirq, autodma); - err = pci_register_driver (&parport_pc_pci_driver); + err = pci_register_driver(&parport_pc_pci_driver); if (!err) pci_registered_parport = 1; } |