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Diffstat (limited to 'drivers/mca/mca-device.c')
-rw-r--r--drivers/mca/mca-device.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/mca/mca-device.c b/drivers/mca/mca-device.c
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+++ b/drivers/mca/mca-device.c
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+/* -*- mode: c; c-basic-offset: 8 -*- */
+
+/*
+ * MCA device support functions
+ *
+ * These functions support the ongoing device access API.
+ *
+ * (C) 2002 James Bottomley <James.Bottomley@HansenPartnership.com>
+ *
+**-----------------------------------------------------------------------------
+**
+** 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 <linux/module.h>
+#include <linux/device.h>
+#include <linux/mca.h>
+
+/**
+ * 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);