From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-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! --- drivers/mca/mca-device.c | 217 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 217 insertions(+) create mode 100644 drivers/mca/mca-device.c (limited to 'drivers/mca/mca-device.c') diff --git a/drivers/mca/mca-device.c b/drivers/mca/mca-device.c new file mode 100644 index 0000000..76d430a --- /dev/null +++ b/drivers/mca/mca-device.c @@ -0,0 +1,217 @@ +/* -*- mode: c; c-basic-offset: 8 -*- */ + +/* + * MCA device support functions + * + * These functions support the ongoing device access API. + * + * (C) 2002 James Bottomley + * +**----------------------------------------------------------------------------- +** +** 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., 675 Mass Ave, Cambridge, MA 02139, USA. +** +**----------------------------------------------------------------------------- + */ + +#include +#include +#include + +/** + * mca_device_read_stored_pos - read POS register from stored data + * @mca_dev: device to read from + * @reg: register to read from + * + * Fetch a POS value that was stored at boot time by the kernel + * when it scanned the MCA space. The register value is returned. + * Missing or invalid registers report 0. + */ +unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev, int reg) +{ + if(reg < 0 || reg >= 8) + return 0; + + return mca_dev->pos[reg]; +} +EXPORT_SYMBOL(mca_device_read_stored_pos); + +/** + * mca_device_read_pos - read POS register from card + * @mca_dev: device to read from + * @reg: register to read from + * + * Fetch a POS value directly from the hardware to obtain the + * current value. This is much slower than + * mca_device_read_stored_pos and may not be invoked from + * interrupt context. It handles the deep magic required for + * onboard devices transparently. + */ +unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg) +{ + struct mca_bus *mca_bus = to_mca_bus(mca_dev->dev.parent); + + return mca_bus->f.mca_read_pos(mca_dev, reg); + + return mca_dev->pos[reg]; +} +EXPORT_SYMBOL(mca_device_read_pos); + + +/** + * mca_device_write_pos - read POS register from card + * @mca_dev: device to write pos register to + * @reg: register to write to + * @byte: byte to write to the POS registers + * + * Store a POS value directly to the hardware. You should not + * normally need to use this function and should have a very good + * knowledge of MCA bus before you do so. Doing this wrongly can + * damage the hardware. + * + * This function may not be used from interrupt context. + * + */ +void mca_device_write_pos(struct mca_device *mca_dev, int reg, + unsigned char byte) +{ + struct mca_bus *mca_bus = to_mca_bus(mca_dev->dev.parent); + + mca_bus->f.mca_write_pos(mca_dev, reg, byte); +} +EXPORT_SYMBOL(mca_device_write_pos); + +/** + * mca_device_transform_irq - transform the ADF obtained IRQ + * @mca_device: device whose irq needs transforming + * @irq: input irq from ADF + * + * MCA Adapter Definition Files (ADF) contain irq, ioport, memory + * etc. definitions. In systems with more than one bus, these need + * to be transformed through bus mapping functions to get the real + * system global quantities. + * + * This function transforms the interrupt number and returns the + * transformed system global interrupt + */ +int mca_device_transform_irq(struct mca_device *mca_dev, int irq) +{ + struct mca_bus *mca_bus = to_mca_bus(mca_dev->dev.parent); + + return mca_bus->f.mca_transform_irq(mca_dev, irq); +} +EXPORT_SYMBOL(mca_device_transform_irq); + +/** + * mca_device_transform_ioport - transform the ADF obtained I/O port + * @mca_device: device whose port needs transforming + * @ioport: input I/O port from ADF + * + * MCA Adapter Definition Files (ADF) contain irq, ioport, memory + * etc. definitions. In systems with more than one bus, these need + * to be transformed through bus mapping functions to get the real + * system global quantities. + * + * This function transforms the I/O port number and returns the + * transformed system global port number. + * + * This transformation can be assumed to be linear for port ranges. + */ +int mca_device_transform_ioport(struct mca_device *mca_dev, int port) +{ + struct mca_bus *mca_bus = to_mca_bus(mca_dev->dev.parent); + + return mca_bus->f.mca_transform_ioport(mca_dev, port); +} +EXPORT_SYMBOL(mca_device_transform_ioport); + +/** + * mca_device_transform_memory - transform the ADF obtained memory + * @mca_device: device whose memory region needs transforming + * @mem: memory region start from ADF + * + * MCA Adapter Definition Files (ADF) contain irq, ioport, memory + * etc. definitions. In systems with more than one bus, these need + * to be transformed through bus mapping functions to get the real + * system global quantities. + * + * This function transforms the memory region start and returns the + * transformed system global memory region (physical). + * + * This transformation can be assumed to be linear for region ranges. + */ +void *mca_device_transform_memory(struct mca_device *mca_dev, void *mem) +{ + struct mca_bus *mca_bus = to_mca_bus(mca_dev->dev.parent); + + return mca_bus->f.mca_transform_memory(mca_dev, mem); +} +EXPORT_SYMBOL(mca_device_transform_memory); + + +/** + * mca_device_claimed - check if claimed by driver + * @mca_dev: device to check + * + * Returns 1 if the slot has been claimed by a driver + */ + +int mca_device_claimed(struct mca_device *mca_dev) +{ + return mca_dev->driver_loaded; +} +EXPORT_SYMBOL(mca_device_claimed); + +/** + * mca_device_set_claim - set the claim value of the driver + * @mca_dev: device to set value for + * @val: claim value to set (1 claimed, 0 unclaimed) + */ +void mca_device_set_claim(struct mca_device *mca_dev, int val) +{ + mca_dev->driver_loaded = val; +} +EXPORT_SYMBOL(mca_device_set_claim); + +/** + * mca_device_status - get the status of the device + * @mca_device: device to get + * + * returns an enumeration of the device status: + * + * MCA_ADAPTER_NORMAL adapter is OK. + * MCA_ADAPTER_NONE no adapter at device (should never happen). + * MCA_ADAPTER_DISABLED adapter is disabled. + * MCA_ADAPTER_ERROR adapter cannot be initialised. + */ +enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev) +{ + return mca_dev->status; +} +EXPORT_SYMBOL(mca_device_status); + +/** + * mca_device_set_name - set the name of the device + * @mca_device: device to set the name of + * @name: name to set + */ +void mca_device_set_name(struct mca_device *mca_dev, const char *name) +{ + if(!mca_dev) + return; + + strlcpy(mca_dev->name, name, sizeof(mca_dev->name)); +} +EXPORT_SYMBOL(mca_device_set_name); -- cgit v1.1