Merge /spare/repo/linux-2.6/

1 files changed, 99 insertions, 0 deletions

diff --git a/include/asm-cris/arch-v10/ide.h b/include/asm-cris/arch-v10/ide.h
new file mode 100644
index 000000000000..8cf2d7cb22ac
--- /dev/null
+++ b/include/asm-cris/arch-v10/ide.h
@@ -0,0 +1,99 @@
+/*
+ *  linux/include/asm-cris/ide.h
+ *
+ *  Copyright (C) 2000, 2001, 2002  Axis Communications AB
+ *
+ *  Authors:    Bjorn Wesen
+ *
+ */
+
+/*
+ *  This file contains the ETRAX 100LX specific IDE code.
+ */
+
+#ifndef __ASMCRIS_IDE_H
+#define __ASMCRIS_IDE_H
+
+#ifdef __KERNEL__
+
+#include <asm/arch/svinto.h>
+#include <asm/io.h>
+#include <asm-generic/ide_iops.h>
+
+
+/* ETRAX 100 can support 4 IDE busses on the same pins (serialized) */
+
+#define MAX_HWIFS	4
+
+extern __inline__ int ide_default_irq(unsigned long base)
+{
+	/* all IDE busses share the same IRQ, number 4.
+	 * this has the side-effect that ide-probe.c will cluster our 4 interfaces
+	 * together in a hwgroup, and will serialize accesses. this is good, because
+	 * we can't access more than one interface at the same time on ETRAX100.
+	 */
+	return 4;
+}
+
+extern __inline__ unsigned long ide_default_io_base(int index)
+{
+	/* we have no real I/O base address per interface, since all go through the
+	 * same register. but in a bitfield in that register, we have the i/f number.
+	 * so we can use the io_base to remember that bitfield.
+	 */
+	static const unsigned long io_bases[MAX_HWIFS] = {
+		IO_FIELD(R_ATA_CTRL_DATA, sel, 0),
+		IO_FIELD(R_ATA_CTRL_DATA, sel, 1),
+		IO_FIELD(R_ATA_CTRL_DATA, sel, 2),
+		IO_FIELD(R_ATA_CTRL_DATA, sel, 3)
+	};
+	return io_bases[index];
+}
+
+/* this is called once for each interface, to setup the port addresses. data_port is the result
+ * of the ide_default_io_base call above. ctrl_port will be 0, but that is don't care for us.
+ */
+
+extern __inline__ void ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port, unsigned long ctrl_port, int *irq)
+{
+	int i;
+
+	/* fill in ports for ATA addresses 0 to 7 */
+
+	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
+		hw->io_ports[i] = data_port |
+			IO_FIELD(R_ATA_CTRL_DATA, addr, i) |
+			IO_STATE(R_ATA_CTRL_DATA, cs0, active);
+	}
+
+	/* the IDE control register is at ATA address 6, with CS1 active instead of CS0 */
+
+	hw->io_ports[IDE_CONTROL_OFFSET] = data_port |
+			IO_FIELD(R_ATA_CTRL_DATA, addr, 6) |
+			IO_STATE(R_ATA_CTRL_DATA, cs1, active);
+
+	/* whats this for ? */
+
+	hw->io_ports[IDE_IRQ_OFFSET] = 0;
+}
+
+extern __inline__ void ide_init_default_hwifs(void)
+{
+	hw_regs_t hw;
+	int index;
+
+	for(index = 0; index < MAX_HWIFS; index++) {
+		ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, NULL);
+		hw.irq = ide_default_irq(ide_default_io_base(index));
+		ide_register_hw(&hw, NULL);
+	}
+}
+
+/* some configuration options we don't need */
+
+#undef SUPPORT_VLB_SYNC
+#define SUPPORT_VLB_SYNC 0
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASMCRIS_IDE_H */