From 3444f5ec49bc6cb901ffea38e085db1d76e1189c Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Mon, 20 Apr 2009 20:22:05 +0900 Subject: sh: pci: Tidy up the dreamcast PCI support. Signed-off-by: Paul Mundt --- arch/sh/drivers/pci/pci-dreamcast.c | 105 ++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 arch/sh/drivers/pci/pci-dreamcast.c (limited to 'arch/sh/drivers/pci/pci-dreamcast.c') diff --git a/arch/sh/drivers/pci/pci-dreamcast.c b/arch/sh/drivers/pci/pci-dreamcast.c new file mode 100644 index 00000000000..0897be5053d --- /dev/null +++ b/arch/sh/drivers/pci/pci-dreamcast.c @@ -0,0 +1,105 @@ +/* + * PCI support for the Sega Dreamcast + * + * Copyright (C) 2001, 2002 M. R. Brown + * Copyright (C) 2002, 2003 Paul Mundt + * + * This file originally bore the message (with enclosed-$): + * Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp + * Dreamcast PCI: Supports SEGA Broadband Adaptor only. + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +static struct resource gapspci_io_resource = { + .name = "GAPSPCI IO", + .start = GAPSPCI_BBA_CONFIG, + .end = GAPSPCI_BBA_CONFIG + GAPSPCI_BBA_CONFIG_SIZE - 1, + .flags = IORESOURCE_IO, +}; + +static struct resource gapspci_mem_resource = { + .name = "GAPSPCI mem", + .start = GAPSPCI_DMA_BASE, + .end = GAPSPCI_DMA_BASE + GAPSPCI_DMA_SIZE - 1, + .flags = IORESOURCE_MEM, +}; + +/* + * gapspci init + */ + +static int __init gapspci_init(struct pci_channel *chan) +{ + char idbuf[16]; + int i; + + /* + * FIXME: All of this wants documenting to some degree, + * even some basic register definitions would be nice. + * + * I haven't seen anything this ugly since.. maple. + */ + + for (i=0; i<16; i++) + idbuf[i] = inb(GAPSPCI_REGS+i); + + if (strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16)) + return -ENODEV; + + outl(0x5a14a501, GAPSPCI_REGS+0x18); + + for (i=0; i<1000000; i++) + cpu_relax(); + + if (inl(GAPSPCI_REGS+0x18) != 1) + return -EINVAL; + + outl(0x01000000, GAPSPCI_REGS+0x20); + outl(0x01000000, GAPSPCI_REGS+0x24); + + outl(GAPSPCI_DMA_BASE, GAPSPCI_REGS+0x28); + outl(GAPSPCI_DMA_BASE+GAPSPCI_DMA_SIZE, GAPSPCI_REGS+0x2c); + + outl(1, GAPSPCI_REGS+0x14); + outl(1, GAPSPCI_REGS+0x34); + + /* Setting Broadband Adapter */ + outw(0xf900, GAPSPCI_BBA_CONFIG+0x06); + outl(0x00000000, GAPSPCI_BBA_CONFIG+0x30); + outb(0x00, GAPSPCI_BBA_CONFIG+0x3c); + outb(0xf0, GAPSPCI_BBA_CONFIG+0x0d); + outw(0x0006, GAPSPCI_BBA_CONFIG+0x04); + outl(0x00002001, GAPSPCI_BBA_CONFIG+0x10); + outl(0x01000000, GAPSPCI_BBA_CONFIG+0x14); + + return 0; +} + +struct pci_channel board_pci_channels[] = { + { + .init = gapspci_init, + .pci_ops = &gapspci_pci_ops, + .io_resource = &gapspci_io_resource, + .mem_resource = &gapspci_mem_resource, + .first_devfn = 0, + .last_devfn = 1, + }, { + .init = NULL, + } +}; -- cgit v1.2.3-70-g09d2