Date: Thu, 28 Nov 2002 17:37:35 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: dirkx@webweaving.org Cc: freebsd-hackers@FreeBSD.ORG, wleiden@xs4all.nl Subject: Re: Understanding PCI intr routing on a Cirrus Logic PD6729 Message-ID: <20021128.173735.63842952.imp@bsdimp.com> In-Reply-To: <20021129004513.P25692-100000@foem.leiden.webweaving.org> References: <20021128235301.I25692-100000@foem.leiden.webweaving.org> <20021129004513.P25692-100000@foem.leiden.webweaving.org>
next in thread | previous in thread | raw e-mail | index | archive | help
In message: <20021129004513.P25692-100000@foem.leiden.webweaving.org>
Dirk-Willem van Gulik <dirkx@webweaving.org> writes:
: > So something in the cardbus_init() may be needed ?
:
: A full powercycle seems to change the situation; and does allow for the
: card(s) to work with just the csc/func calls.
I'm very confused now. I took a look at the datasheet to see how
calling cardbus_init() could have had any effect...
brgcntl = pci_read_config(dev, CB_PCI_BRIDGE_CTRL, 2);
brgcntl |= CB_BCR_WRITE_POST_EN | CB_BCR_MASTER_ABORT;
pci_write_config(dev, CB_PCI_BRIDGE_CTRL, brgcntl, 2);
The CLPD6729 has a Type 0 header. The effect of these lines are to
turn on bits 5 and 7 in the MIN_GNT register (minimum grant time of
40us). I don't see how this happens.
pci_write_config(dev, CB_PCI_LEGACY16_IOADDR, 0, 2);
According to the datasheet, offset 0x44 is past the registers defined
(0-0x3f).
pci_write_config(dev, CB_PCI_MEMBASE0, 0, 4);
pci_write_config(dev, CB_PCI_MEMLIMIT0, 0, 4);
pci_write_config(dev, CB_PCI_MEMBASE1, 0, 4);
pci_write_config(dev, CB_PCI_MEMLIMIT1, 0, 4);
pci_write_config(dev, CB_PCI_IOBASE0, 0, 4);
pci_write_config(dev, CB_PCI_IOLIMIT0, 0, 4);
pci_write_config(dev, CB_PCI_IOBASE1, 0, 4);
pci_write_config(dev, CB_PCI_IOLIMIT1, 0, 4);
This writes 0's 0x20-0x38. This is BAR4, BAR5, CardBus CIS, subsystem
id, expansion ROM, CAP ptr and some reserved registers that the
datasheet says nothing about. Some of these are read-only even.
So after the first power cycle, can you reboot w/o a power cycle?
Warner
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20021128.173735.63842952.imp>