diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-cris/arch-v10/ide.h | 99 | ||||
| -rw-r--r-- | include/asm-cris/ide.h | 1 |
2 files changed, 100 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 00000000000..8cf2d7cb22a --- /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 */ diff --git a/include/asm-cris/ide.h b/include/asm-cris/ide.h new file mode 100644 index 00000000000..a894f66665f --- /dev/null +++ b/include/asm-cris/ide.h @@ -0,0 +1 @@ +#include <asm/arch/ide.h> |