[MIPS] Support for the RM9000-based Basler eXcite smart camera platform.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 149 insertions, 0 deletions

diff --git a/arch/mips/pci/pci-excite.c b/arch/mips/pci/pci-excite.c
new file mode 100644
index 000000000000..3c86c77cb74f
--- /dev/null
+++ b/arch/mips/pci/pci-excite.c
@@ -0,0 +1,149 @@
+/*
+ *  Copyright (C) 2004 by Basler Vision Technologies AG
+ *  Author: Thomas Koeller <thomas.koeller@baslerweb.com>
+ *  Based on the PMC-Sierra Yosemite board support by Ralf Baechle.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/bitops.h>
+#include <asm/rm9k-ocd.h>
+#include <excite.h>
+
+
+extern struct pci_ops titan_pci_ops;
+
+
+static struct resource
+	mem_resource = 	{
+		.name	= "PCI memory",
+		.start	= EXCITE_PHYS_PCI_MEM,
+		.end	= EXCITE_PHYS_PCI_MEM + EXCITE_SIZE_PCI_MEM - 1,
+		.flags	= IORESOURCE_MEM
+	},
+	io_resource = {
+		.name	= "PCI I/O",
+		.start	= EXCITE_PHYS_PCI_IO,
+		.end	= EXCITE_PHYS_PCI_IO + EXCITE_SIZE_PCI_IO - 1,
+		.flags	= IORESOURCE_IO
+	};
+
+
+static struct pci_controller bx_controller = {
+	.pci_ops	= &titan_pci_ops,
+	.mem_resource	= &mem_resource,
+	.mem_offset	= 0x00000000UL,
+	.io_resource	= &io_resource,
+	.io_offset	= 0x00000000UL
+};
+
+
+static char
+	iopage_failed[] __initdata   = "Cannot allocate PCI I/O page",
+	modebits_no_pci[] __initdata = "PCI is not configured in mode bits";
+
+#define RM9000x2_OCD_HTSC	0x0604
+#define RM9000x2_OCD_HTBHL	0x060c
+#define RM9000x2_OCD_PCIHRST	0x078c
+
+#define RM9K_OCD_MODEBIT1	0x00d4 /* (MODEBIT1) Mode Bit 1 */
+#define RM9K_OCD_CPHDCR		0x00f4 /* CPU-PCI/HT Data Control. */
+
+#define PCISC_FB2B 		0x00000200
+#define PCISC_MWICG		0x00000010
+#define PCISC_EMC		0x00000004
+#define PCISC_ERMA		0x00000002
+
+
+
+static int __init basler_excite_pci_setup(void)
+{
+	const unsigned int fullbars = memsize / (256 << 20);
+	unsigned int i;
+
+	/* Check modebits to see if PCI is really enabled. */
+	if (!((ocd_readl(RM9K_OCD_MODEBIT1) >> (47-32)) & 0x1))
+		panic(modebits_no_pci);
+
+	if (NULL == request_mem_region(EXCITE_PHYS_PCI_IO, EXCITE_SIZE_PCI_IO,
+				       "Memory-mapped PCI I/O page"))
+		panic(iopage_failed);
+
+	/* Enable PCI 0 as master for config cycles */
+	ocd_writel(PCISC_EMC | PCISC_ERMA, RM9000x2_OCD_HTSC);
+
+
+	/* Set up latency timer */
+	ocd_writel(0x8008, RM9000x2_OCD_HTBHL);
+
+	/*  Setup host IO and Memory space */
+	ocd_writel((EXCITE_PHYS_PCI_IO >> 4) | 1, LKB7);
+	ocd_writel(((EXCITE_SIZE_PCI_IO >> 4) & 0x7fffff00) - 0x100, LKM7);
+	ocd_writel((EXCITE_PHYS_PCI_MEM >> 4) | 1, LKB8);
+	ocd_writel(((EXCITE_SIZE_PCI_MEM >> 4) & 0x7fffff00) - 0x100, LKM8);
+
+	/* Set up PCI BARs to map all installed memory */
+	for (i = 0; i < 6; i++) {
+		const unsigned int bar = 0x610 + i * 4;
+
+	     	if (i < fullbars) {
+			ocd_writel(0x10000000 * i, bar);
+			ocd_writel(0x01000000 * i, bar + 0x140);
+			ocd_writel(0x0ffff029, bar + 0x100);
+			continue;
+		}
+
+	     	if (i == fullbars) {
+			int o;
+			u32 mask;
+
+			const unsigned long rem = memsize - i * 0x10000000;
+			if (!rem) {
+				ocd_writel(0x00000000, bar + 0x100);
+				continue;
+			}
+
+			o = ffs(rem) - 1;
+			if (rem & ~(0x1 << o))
+				o++;
+			mask = ((0x1 << o) & 0x0ffff000) - 0x1000;
+			ocd_writel(0x10000000 * i, bar);
+			ocd_writel(0x01000000 * i, bar + 0x140);
+			ocd_writel(0x00000029 | mask, bar + 0x100);
+			continue;
+		}
+
+		ocd_writel(0x00000000, bar + 0x100);
+	}
+
+	/* Finally, enable the PCI interupt */
+#if USB_IRQ > 7
+	set_c0_intcontrol(1 << USB_IRQ);
+#else
+	set_c0_status(1 << (USB_IRQ + 8));
+#endif
+
+	ioport_resource.start = EXCITE_PHYS_PCI_IO;
+	ioport_resource.end = EXCITE_PHYS_PCI_IO + EXCITE_SIZE_PCI_IO - 1;
+	set_io_port_base((unsigned long) ioremap_nocache(EXCITE_PHYS_PCI_IO, EXCITE_SIZE_PCI_IO));
+	register_pci_controller(&bx_controller);
+	return 0;
+}
+
+
+arch_initcall(basler_excite_pci_setup);