[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>
diff --git a/drivers/tc/tc.c b/drivers/tc/tc.c
index 4a51e56..5514e52 100644
--- a/drivers/tc/tc.c
+++ b/drivers/tc/tc.c
@@ -1,254 +1,193 @@
/*
- * tc-init: We assume the TURBOchannel to be up and running so
- * just probe for Modules and fill in the global data structure
- * tc_bus.
+ * TURBOchannel bus services.
*
- * 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.
+ * Copyright (c) Harald Koerfgen, 1998
+ * Copyright (c) 2001, 2003, 2005, 2006 Maciej W. Rozycki
+ * Copyright (c) 2005 James Simmons
*
- * Copyright (c) Harald Koerfgen, 1998
- * Copyright (c) 2001, 2003, 2005 Maciej W. Rozycki
+ * 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.
*/
+#include <linux/compiler.h>
+#include <linux/errno.h>
#include <linux/init.h>
+#include <linux/ioport.h>
#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/module.h>
#include <linux/string.h>
+#include <linux/tc.h>
#include <linux/types.h>
-#include <asm/addrspace.h>
-#include <asm/errno.h>
#include <asm/io.h>
-#include <asm/paccess.h>
-#include <asm/dec/machtype.h>
-#include <asm/dec/prom.h>
-#include <asm/dec/tcinfo.h>
-#include <asm/dec/tcmodule.h>
-#include <asm/dec/interrupts.h>
-
-MODULE_LICENSE("GPL");
-slot_info tc_bus[MAX_SLOT];
-static int num_tcslots;
-static tcinfo *info;
+static struct tc_bus tc_bus = {
+ .name = "TURBOchannel",
+};
/*
- * Interface to the world. Read comment in include/asm-mips/tc.h.
+ * Probing for TURBOchannel modules.
*/
-
-int search_tc_card(const char *name)
+static void __init tc_bus_add_devices(struct tc_bus *tbus)
{
- int slot;
- slot_info *sip;
-
- for (slot = 0; slot < num_tcslots; slot++) {
- sip = &tc_bus[slot];
- if ((sip->flags & FREE) &&
- (strncmp(sip->name, name, strlen(name)) == 0)) {
- return slot;
- }
- }
-
- return -ENODEV;
-}
-
-void claim_tc_card(int slot)
-{
- if (tc_bus[slot].flags & IN_USE) {
- printk("claim_tc_card: attempting to claim a card already in use\n");
- return;
- }
- tc_bus[slot].flags &= ~FREE;
- tc_bus[slot].flags |= IN_USE;
-}
-
-void release_tc_card(int slot)
-{
- if (tc_bus[slot].flags & FREE) {
- printk("release_tc_card: "
- "attempting to release a card already free\n");
- return;
- }
- tc_bus[slot].flags &= ~IN_USE;
- tc_bus[slot].flags |= FREE;
-}
-
-unsigned long get_tc_base_addr(int slot)
-{
- return tc_bus[slot].base_addr;
-}
-
-unsigned long get_tc_irq_nr(int slot)
-{
- return tc_bus[slot].interrupt;
-}
-
-unsigned long get_tc_speed(void)
-{
- return 100000 * (10000 / (unsigned long)info->clk_period);
-}
-
-/*
- * Probing for TURBOchannel modules
- */
-static void __init tc_probe(unsigned long startaddr, unsigned long size,
- int slots)
-{
- unsigned long slotaddr;
+ resource_size_t slotsize = tbus->info.slot_size << 20;
+ resource_size_t extslotsize = tbus->ext_slot_size;
+ resource_size_t slotaddr;
+ resource_size_t extslotaddr;
+ resource_size_t devsize;
+ void __iomem *module;
+ struct tc_dev *tdev;
int i, slot, err;
- long offset;
u8 pattern[4];
- volatile u8 *module;
+ long offset;
- for (slot = 0; slot < slots; slot++) {
- slotaddr = startaddr + slot * size;
- module = ioremap_nocache(slotaddr, size);
+ for (slot = 0; slot < tbus->num_tcslots; slot++) {
+ slotaddr = tbus->slot_base + slot * slotsize;
+ extslotaddr = tbus->ext_slot_base + slot * extslotsize;
+ module = ioremap_nocache(slotaddr, slotsize);
BUG_ON(!module);
- offset = OLDCARD;
+ offset = TC_OLDCARD;
err = 0;
- err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0);
- err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1);
- err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2);
- err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3);
- if (err) {
- iounmap(module);
- continue;
- }
+ err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0);
+ err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1);
+ err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2);
+ err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3);
+ if (err)
+ goto out_err;
if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
pattern[2] != 0xaa || pattern[3] != 0xff) {
- offset = NEWCARD;
+ offset = TC_NEWCARD;
err = 0;
- err |= get_dbe(pattern[0], module + TC_PATTERN0);
- err |= get_dbe(pattern[1], module + TC_PATTERN1);
- err |= get_dbe(pattern[2], module + TC_PATTERN2);
- err |= get_dbe(pattern[3], module + TC_PATTERN3);
- if (err) {
- iounmap(module);
- continue;
- }
+ err |= tc_preadb(pattern + 0,
+ module + offset + TC_PATTERN0);
+ err |= tc_preadb(pattern + 1,
+ module + offset + TC_PATTERN1);
+ err |= tc_preadb(pattern + 2,
+ module + offset + TC_PATTERN2);
+ err |= tc_preadb(pattern + 3,
+ module + offset + TC_PATTERN3);
+ if (err)
+ goto out_err;
}
if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
- pattern[2] != 0xaa || pattern[3] != 0xff) {
- iounmap(module);
- continue;
- }
+ pattern[2] != 0xaa || pattern[3] != 0xff)
+ goto out_err;
- tc_bus[slot].base_addr = slotaddr;
+ /* Found a board, allocate it an entry in the list */
+ tdev = kzalloc(sizeof(*tdev), GFP_KERNEL);
+ if (!tdev) {
+ printk(KERN_ERR "tc%x: unable to allocate tc_dev\n",
+ slot);
+ goto out_err;
+ }
+ sprintf(tdev->dev.bus_id, "tc%x", slot);
+ tdev->bus = tbus;
+ tdev->dev.parent = &tbus->dev;
+ tdev->dev.bus = &tc_bus_type;
+ tdev->slot = slot;
+
for (i = 0; i < 8; i++) {
- tc_bus[slot].firmware[i] =
- module[TC_FIRM_VER + offset + 4 * i];
- tc_bus[slot].vendor[i] =
- module[TC_VENDOR + offset + 4 * i];
- tc_bus[slot].name[i] =
- module[TC_MODULE + offset + 4 * i];
+ tdev->firmware[i] =
+ readb(module + offset + TC_FIRM_VER + 4 * i);
+ tdev->vendor[i] =
+ readb(module + offset + TC_VENDOR + 4 * i);
+ tdev->name[i] =
+ readb(module + offset + TC_MODULE + 4 * i);
}
- tc_bus[slot].firmware[8] = 0;
- tc_bus[slot].vendor[8] = 0;
- tc_bus[slot].name[8] = 0;
- /*
- * Looks unneccesary, but we may change
- * TC? in the future
- */
- switch (slot) {
- case 0:
- tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0];
- break;
- case 1:
- tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1];
- break;
- case 2:
- tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2];
- break;
- /*
- * Yuck! DS5000/200 onboard devices
- */
- case 5:
- tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5];
- break;
- case 6:
- tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6];
- break;
- default:
- tc_bus[slot].interrupt = -1;
- break;
- }
+ tdev->firmware[8] = 0;
+ tdev->vendor[8] = 0;
+ tdev->name[8] = 0;
+ pr_info("%s: %s %s %s\n", tdev->dev.bus_id, tdev->vendor,
+ tdev->name, tdev->firmware);
+
+ devsize = readb(module + offset + TC_SLOT_SIZE);
+ devsize <<= 22;
+ if (devsize <= slotsize) {
+ tdev->resource.start = slotaddr;
+ tdev->resource.end = slotaddr + devsize - 1;
+ } else if (devsize <= extslotsize) {
+ tdev->resource.start = extslotaddr;
+ tdev->resource.end = extslotaddr + devsize - 1;
+ } else {
+ printk(KERN_ERR "%s: Cannot provide slot space "
+ "(%dMiB required, up to %dMiB supported)\n",
+ tdev->dev.bus_id, devsize >> 20,
+ max(slotsize, extslotsize) >> 20);
+ kfree(tdev);
+ goto out_err;
+ }
+ tdev->resource.name = tdev->name;
+ tdev->resource.flags = IORESOURCE_MEM;
+
+ tc_device_get_irq(tdev);
+
+ device_register(&tdev->dev);
+ list_add_tail(&tdev->node, &tbus->devices);
+
+out_err:
iounmap(module);
}
}
/*
- * the main entry
+ * The main entry.
*/
static int __init tc_init(void)
{
- int tc_clock;
- int i;
- unsigned long slot0addr;
- unsigned long slot_size;
-
- if (!TURBOCHANNEL)
+ /* Initialize the TURBOchannel bus */
+ if (tc_bus_get_info(&tc_bus))
return 0;
- for (i = 0; i < MAX_SLOT; i++) {
- tc_bus[i].base_addr = 0;
- tc_bus[i].name[0] = 0;
- tc_bus[i].vendor[0] = 0;
- tc_bus[i].firmware[0] = 0;
- tc_bus[i].interrupt = -1;
- tc_bus[i].flags = FREE;
- }
+ INIT_LIST_HEAD(&tc_bus.devices);
+ strcpy(tc_bus.dev.bus_id, "tc");
+ device_register(&tc_bus.dev);
- info = rex_gettcinfo();
- slot0addr = CPHYSADDR((long)rex_slot_address(0));
+ if (tc_bus.info.slot_size) {
+ unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000;
- switch (mips_machtype) {
- case MACH_DS5000_200:
- num_tcslots = 7;
- break;
- case MACH_DS5000_1XX:
- case MACH_DS5000_2X0:
- case MACH_DS5900:
- num_tcslots = 3;
- break;
- case MACH_DS5000_XX:
- default:
- num_tcslots = 2;
- break;
- }
+ pr_info("tc: TURBOchannel rev. %d at %d.%d MHz "
+ "(with%s parity)\n", tc_bus.info.revision,
+ tc_clock / 10, tc_clock % 10,
+ tc_bus.info.parity ? "" : "out");
- tc_clock = 10000 / info->clk_period;
-
- if (info->slot_size && slot0addr) {
- pr_info("TURBOchannel rev. %d at %d.%d MHz (with%s parity)\n",
- info->revision, tc_clock / 10, tc_clock % 10,
- info->parity ? "" : "out");
-
- slot_size = info->slot_size << 20;
-
- tc_probe(slot0addr, slot_size, num_tcslots);
-
- for (i = 0; i < num_tcslots; i++) {
- if (!tc_bus[i].base_addr)
- continue;
- pr_info(" slot %d: %s %s %s\n", i, tc_bus[i].vendor,
- tc_bus[i].name, tc_bus[i].firmware);
+ tc_bus.resource[0].start = tc_bus.slot_base;
+ tc_bus.resource[0].end = tc_bus.slot_base +
+ (tc_bus.info.slot_size << 20) *
+ tc_bus.num_tcslots;
+ tc_bus.resource[0].name = tc_bus.name;
+ tc_bus.resource[0].flags = IORESOURCE_MEM;
+ if (request_resource(&iomem_resource,
+ &tc_bus.resource[0]) < 0) {
+ printk(KERN_ERR "tc: Cannot reserve resource\n");
+ return 0;
}
+ if (tc_bus.ext_slot_size) {
+ tc_bus.resource[1].start = tc_bus.ext_slot_base;
+ tc_bus.resource[1].end = tc_bus.ext_slot_base +
+ tc_bus.ext_slot_size *
+ tc_bus.num_tcslots;
+ tc_bus.resource[1].name = tc_bus.name;
+ tc_bus.resource[1].flags = IORESOURCE_MEM;
+ if (request_resource(&iomem_resource,
+ &tc_bus.resource[1]) < 0) {
+ printk(KERN_ERR
+ "tc: Cannot reserve resource\n");
+ release_resource(&tc_bus.resource[0]);
+ return 0;
+ }
+ }
+
+ tc_bus_add_devices(&tc_bus);
}
return 0;
}
subsys_initcall(tc_init);
-
-EXPORT_SYMBOL(search_tc_card);
-EXPORT_SYMBOL(claim_tc_card);
-EXPORT_SYMBOL(release_tc_card);
-EXPORT_SYMBOL(get_tc_base_addr);
-EXPORT_SYMBOL(get_tc_irq_nr);
-EXPORT_SYMBOL(get_tc_speed);