Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 196 insertions, 0 deletions

diff --git a/arch/mips/pci/ops-bonito64.c b/arch/mips/pci/ops-bonito64.c
new file mode 100644
index 0000000..4b4e086
--- /dev/null
+++ b/arch/mips/pci/ops-bonito64.c
@@ -0,0 +1,196 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999, 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope 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.
+ *
+ * MIPS boards specific PCI support.
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/mips-boards/bonito64.h>
+
+#define PCI_ACCESS_READ  0
+#define PCI_ACCESS_WRITE 1
+
+/*
+ *  PCI configuration cycle AD bus definition
+ */
+/* Type 0 */
+#define PCI_CFG_TYPE0_REG_SHF           0
+#define PCI_CFG_TYPE0_FUNC_SHF          8
+
+/* Type 1 */
+#define PCI_CFG_TYPE1_REG_SHF           0
+#define PCI_CFG_TYPE1_FUNC_SHF          8
+#define PCI_CFG_TYPE1_DEV_SHF           11
+#define PCI_CFG_TYPE1_BUS_SHF           16
+
+static int bonito64_pcibios_config_access(unsigned char access_type,
+				      struct pci_bus *bus,
+				      unsigned int devfn, int where,
+				      u32 * data)
+{
+	unsigned char busnum = bus->number;
+	u32 dummy;
+	u64 pci_addr;
+
+	/* Algorithmics Bonito64 system controller. */
+
+	if ((busnum == 0) && (PCI_SLOT(devfn) > 21)) {
+		/* We number bus 0 devices from 0..21 */
+		return -1;
+	}
+
+#ifdef CONFIG_MIPS_BOARDS_GEN
+	if ((busnum == 0) && (PCI_SLOT(devfn) == 17)) {
+		/* MIPS Core boards have Bonito connected as device 17 */
+		return -1;
+	}
+#endif
+
+	/* Clear cause register bits */
+	BONITO_PCICMD |= (BONITO_PCICMD_MABORT_CLR |
+			  BONITO_PCICMD_MTABORT_CLR);
+
+	/*
+	 * Setup pattern to be used as PCI "address" for
+	 * Type 0 cycle
+	 */
+	if (busnum == 0) {
+		/* IDSEL */
+		pci_addr = (u64) 1 << (PCI_SLOT(devfn) + 10);
+	} else {
+		/* Bus number */
+		pci_addr = busnum << PCI_CFG_TYPE1_BUS_SHF;
+
+		/* Device number */
+		pci_addr |=
+		    PCI_SLOT(devfn) << PCI_CFG_TYPE1_DEV_SHF;
+	}
+
+	/* Function (same for Type 0/1) */
+	pci_addr |= PCI_FUNC(devfn) << PCI_CFG_TYPE0_FUNC_SHF;
+
+	/* Register number (same for Type 0/1) */
+	pci_addr |= (where & ~0x3) << PCI_CFG_TYPE0_REG_SHF;
+
+	if (busnum == 0) {
+		/* Type 0 */
+		BONITO_PCIMAP_CFG = pci_addr >> 16;
+	} else {
+		/* Type 1 */
+		BONITO_PCIMAP_CFG = (pci_addr >> 16) | 0x10000;
+	}
+
+	pci_addr &= 0xffff;
+
+	/* Flush Bonito register block */
+	dummy = BONITO_PCIMAP_CFG;
+	iob();		/* sync */
+
+	/* Perform access */
+	if (access_type == PCI_ACCESS_WRITE) {
+		*(volatile u32 *) (_pcictrl_bonito_pcicfg + (u32)pci_addr) = *(u32 *) data;
+
+		/* Wait till done */
+		while (BONITO_PCIMSTAT & 0xF);
+	} else {
+		*(u32 *) data = *(volatile u32 *) (_pcictrl_bonito_pcicfg + (u32)pci_addr);
+	}
+
+	/* Detect Master/Target abort */
+	if (BONITO_PCICMD & (BONITO_PCICMD_MABORT_CLR |
+			     BONITO_PCICMD_MTABORT_CLR)) {
+		/* Error occurred */
+
+		/* Clear bits */
+		BONITO_PCICMD |= (BONITO_PCICMD_MABORT_CLR |
+				  BONITO_PCICMD_MTABORT_CLR);
+
+		return -1;
+	}
+
+	return 0;
+}
+
+
+/*
+ * We can't address 8 and 16 bit words directly.  Instead we have to
+ * read/write a 32bit word and mask/modify the data we actually want.
+ */
+static int bonito64_pcibios_read(struct pci_bus *bus, unsigned int devfn,
+			     int where, int size, u32 * val)
+{
+	u32 data = 0;
+
+	if ((size == 2) && (where & 1))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	else if ((size == 4) && (where & 3))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	if (bonito64_pcibios_config_access(PCI_ACCESS_READ, bus, devfn, where,
+				       &data))
+		return -1;
+
+	if (size == 1)
+		*val = (data >> ((where & 3) << 3)) & 0xff;
+	else if (size == 2)
+		*val = (data >> ((where & 3) << 3)) & 0xffff;
+	else
+		*val = data;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int bonito64_pcibios_write(struct pci_bus *bus, unsigned int devfn,
+			      int where, int size, u32 val)
+{
+	u32 data = 0;
+
+	if ((size == 2) && (where & 1))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+	else if ((size == 4) && (where & 3))
+		return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	if (size == 4)
+		data = val;
+	else {
+		if (bonito64_pcibios_config_access(PCI_ACCESS_READ, bus, devfn,
+		                               where, &data))
+			return -1;
+
+		if (size == 1)
+			data = (data & ~(0xff << ((where & 3) << 3))) |
+				(val << ((where & 3) << 3));
+		else if (size == 2)
+			data = (data & ~(0xffff << ((where & 3) << 3))) |
+				(val << ((where & 3) << 3));
+	}
+
+	if (bonito64_pcibios_config_access(PCI_ACCESS_WRITE, bus, devfn, where,
+				       &data))
+		return -1;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+struct pci_ops bonito64_pci_ops = {
+	.read = bonito64_pcibios_read,
+	.write = bonito64_pcibios_write
+};