[TC] MIPS: TURBOchannel update to the driver model

This is a set of changes to convert support for the TURBOchannel bus to the
driver model.  It implements the usual set of calls similar to what other bus
drivers have: tc_register_driver(), tc_unregister_driver(), etc.  All the
platform-specific bits have been removed and headers from asm-mips/dec/ have
been merged into linux/tc.h, which should be included by drivers.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/include/linux/tc.h b/include/linux/tc.h
new file mode 100644
index 000000000000..f92511e57cdb
--- /dev/null
+++ b/include/linux/tc.h
@@ -0,0 +1,141 @@
+/*
+ *      Interface to the TURBOchannel related routines.
+ *
+ *      Copyright (c) 1998  Harald Koerfgen
+ *      Copyright (c) 2005  James Simmons
+ *      Copyright (c) 2006  Maciej W. Rozycki
+ *
+ *      Based on:
+ *
+ *      "TURBOchannel Firmware Specification", EK-TCAAD-FS-004
+ *
+ *      from Digital Equipment Corporation.
+ *
+ *      This file is subject to the terms and conditions of the GNU
+ *      General Public License.  See the file "COPYING" in the main
+ *      directory of this archive for more details.
+ */
+#ifndef _LINUX_TC_H
+#define _LINUX_TC_H
+
+#include <linux/compiler.h>
+#include <linux/device.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+
+/*
+ * Offsets for the ROM header locations for TURBOchannel cards.
+ */
+#define TC_OLDCARD      0x3c0000
+#define TC_NEWCARD      0x000000
+
+#define TC_ROM_WIDTH    0x3e0
+#define TC_ROM_STRIDE   0x3e4
+#define TC_ROM_SIZE     0x3e8
+#define TC_SLOT_SIZE    0x3ec
+#define TC_PATTERN0     0x3f0
+#define TC_PATTERN1     0x3f4
+#define TC_PATTERN2     0x3f8
+#define TC_PATTERN3     0x3fc
+#define TC_FIRM_VER     0x400
+#define TC_VENDOR       0x420
+#define TC_MODULE       0x440
+#define TC_FIRM_TYPE    0x460
+#define TC_FLAGS        0x470
+#define TC_ROM_OBJECTS  0x480
+
+/*
+ * Information obtained through the get_tcinfo() PROM call.
+ */
+struct tcinfo {
+        s32             revision;       /* Hardware revision level. */
+        s32             clk_period;     /* Clock period in nanoseconds. */
+        s32             slot_size;      /* Slot size in megabytes. */
+        s32             io_timeout;     /* I/O timeout in cycles. */
+        s32             dma_range;      /* DMA address range in megabytes. */
+        s32             max_dma_burst;  /* Maximum DMA burst length. */
+        s32             parity;         /* System module supports TC parity. */
+        s32             reserved[4];
+};
+
+/*
+ * TURBOchannel bus.
+ */
+struct tc_bus {
+        struct list_head devices;       /* List of devices on this bus. */
+        struct resource resource[2];    /* Address space routed to this bus. */
+
+        struct device   dev;
+        char            name[13];
+        resource_size_t slot_base;
+        resource_size_t ext_slot_base;
+        resource_size_t ext_slot_size;
+        int             num_tcslots;
+        struct tcinfo   info;
+};
+
+/*
+ * TURBOchannel device.
+ */
+struct tc_dev {
+        struct list_head node;          /* Node in list of all TC devices. */
+        struct tc_bus   *bus;           /* Bus this device is on. */
+        struct tc_driver *driver;       /* Which driver has allocated this
+                                           device. */
+        struct device   dev;            /* Generic device interface. */
+        struct resource resource;       /* Address space of this device. */
+        char            vendor[9];
+        char            name[9];
+        char            firmware[9];
+        int             interrupt;
+        int             slot;
+};
+
+#define to_tc_dev(n) container_of(n, struct tc_dev, dev)
+
+struct tc_device_id {
+        char            vendor[9];
+        char            name[9];
+};
+
+/*
+ * TURBOchannel driver.
+ */
+struct tc_driver {
+        struct list_head node;
+        const struct tc_device_id *id_table;
+        struct device_driver driver;
+};
+
+#define to_tc_driver(drv) container_of(drv, struct tc_driver, driver)
+
+/*
+ * Return TURBOchannel clock frequency in Hz.
+ */
+static inline unsigned long tc_get_speed(struct tc_bus *tbus)
+{
+        return 100000 * (10000 / (unsigned long)tbus->info.clk_period);
+}
+
+#ifdef CONFIG_TC
+
+extern struct bus_type tc_bus_type;
+
+extern int tc_register_driver(struct tc_driver *tdrv);
+extern void tc_unregister_driver(struct tc_driver *tdrv);
+
+#else /* !CONFIG_TC */
+
+static inline int tc_register_driver(struct tc_driver *tdrv) { return 0; }
+static inline void tc_unregister_driver(struct tc_driver *tdrv) { }
+
+#endif /* CONFIG_TC */
+
+/*
+ * These have to be provided by the architecture.
+ */
+extern int tc_preadb(u8 *valp, void __iomem *addr);
+extern int tc_bus_get_info(struct tc_bus *tbus);
+extern void tc_device_get_irq(struct tc_dev *tdev);
+
+#endif /* _LINUX_TC_H */