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Date: Thu, 28 Feb 2008 00:03:29 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] ide-cs: manage I/O resources in driver
* Make idecs_register() return pointer to hwif structure instead of
hwif's index.
* Store pointer to hwif structure instead of hwif's index in ide_info_t
(fixes ide-cs for IDE[6-9]_MAJOR major numbers).
* Remove no longer needed ide_major[].
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
drivers/ide/legacy/ide-cs.c | 70 ++++++++++++++++++++++++++++++--------------
1 file changed, 48 insertions(+), 22 deletions(-)
Index: b/drivers/ide/legacy/ide-cs.c
===================================================================
--- a/drivers/ide/legacy/ide-cs.c
+++ b/drivers/ide/legacy/ide-cs.c
@@ -51,6 +51,8 @@
#include <pcmcia/cisreg.h>
#include <pcmcia/ciscode.h>
+#define DRV_NAME "ide-cs"
+
/*====================================================================*/
/* Module parameters */
@@ -72,16 +74,11 @@ static char *version =
/*====================================================================*/
-static const char ide_major[] = {
- IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR,
- IDE4_MAJOR, IDE5_MAJOR
-};
-
typedef struct ide_info_t {
struct pcmcia_device *p_dev;
+ ide_hwif_t *hwif;
int ndev;
dev_node_t node;
- int hd;
} ide_info_t;
static void ide_release(struct pcmcia_device *);
@@ -136,24 +133,44 @@ static int ide_probe(struct pcmcia_devic
static void ide_detach(struct pcmcia_device *link)
{
+ ide_info_t *info = link->priv;
+ ide_hwif_t *hwif = info->hwif;
+
DEBUG(0, "ide_detach(0x%p)\n", link);
ide_release(link);
- kfree(link->priv);
+ release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
+ release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
+
+ kfree(info);
} /* ide_detach */
static const struct ide_port_ops idecs_port_ops = {
.quirkproc = ide_undecoded_slave,
};
-static int idecs_register(unsigned long io, unsigned long ctl, unsigned long irq, struct pcmcia_device *handle)
+static ide_hwif_t *idecs_register(unsigned long io, unsigned long ctl,
+ unsigned long irq, struct pcmcia_device *handle)
{
ide_hwif_t *hwif;
hw_regs_t hw;
int i;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+ if (!request_region(io, 8, DRV_NAME)) {
+ printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+ DRV_NAME, io, io + 7);
+ return NULL;
+ }
+
+ if (!request_region(ctl, 1, DRV_NAME)) {
+ printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+ DRV_NAME, ctl);
+ release_region(io, 8);
+ return NULL;
+ }
+
memset(&hw, 0, sizeof(hw));
ide_std_init_ports(&hw, io, ctl);
hw.irq = irq;
@@ -162,7 +179,7 @@ static int idecs_register(unsigned long
hwif = ide_find_port();
if (hwif == NULL)
- return -1;
+ goto out_release;
i = hwif->index;
@@ -178,7 +195,13 @@ static int idecs_register(unsigned long
ide_device_add(idx, NULL);
- return hwif->present ? i : -1;
+ if (hwif->present)
+ return hwif;
+
+out_release:
+ release_region(ctl, 1);
+ release_region(io, 8);
+ return NULL;
}
/*======================================================================
@@ -203,8 +226,9 @@ static int ide_config(struct pcmcia_devi
cistpl_cftable_entry_t dflt;
} *stk = NULL;
cistpl_cftable_entry_t *cfg;
- int i, pass, last_ret = 0, last_fn = 0, hd, is_kme = 0;
+ int i, pass, last_ret = 0, last_fn = 0, is_kme = 0;
unsigned long io_base, ctl_base;
+ ide_hwif_t *hwif;
DEBUG(0, "ide_config(0x%p)\n", link);
@@ -300,14 +324,15 @@ static int ide_config(struct pcmcia_devi
outb(0x81, ctl_base+1);
/* retry registration in case device is still spinning up */
- for (hd = -1, i = 0; i < 10; i++) {
- hd = idecs_register(io_base, ctl_base, link->irq.AssignedIRQ, link);
- if (hd >= 0) break;
+ for (i = 0; i < 10; i++) {
+ hwif = idecs_register(io_base, ctl_base, link->irq.AssignedIRQ, link);
+ if (hwif)
+ break;
if (link->io.NumPorts1 == 0x20) {
outb(0x02, ctl_base + 0x10);
- hd = idecs_register(io_base + 0x10, ctl_base + 0x10,
- link->irq.AssignedIRQ, link);
- if (hd >= 0) {
+ hwif = idecs_register(io_base + 0x10, ctl_base + 0x10,
+ link->irq.AssignedIRQ, link);
+ if (hwif) {
io_base += 0x10;
ctl_base += 0x10;
break;
@@ -316,7 +341,7 @@ static int ide_config(struct pcmcia_devi
msleep(100);
}
- if (hd < 0) {
+ if (hwif == NULL) {
printk(KERN_NOTICE "ide-cs: ide_register() at 0x%3lx & 0x%3lx"
", irq %u failed\n", io_base, ctl_base,
link->irq.AssignedIRQ);
@@ -324,10 +349,10 @@ static int ide_config(struct pcmcia_devi
}
info->ndev = 1;
- sprintf(info->node.dev_name, "hd%c", 'a' + (hd * 2));
- info->node.major = ide_major[hd];
+ sprintf(info->node.dev_name, "hd%c", 'a' + hwif->index * 2);
+ info->node.major = hwif->major;
info->node.minor = 0;
- info->hd = hd;
+ info->hwif = hwif;
link->dev_node = &info->node;
printk(KERN_INFO "ide-cs: %s: Vpp = %d.%d\n",
info->node.dev_name, link->conf.Vpp / 10, link->conf.Vpp % 10);
@@ -358,13 +383,14 @@ failed:
void ide_release(struct pcmcia_device *link)
{
ide_info_t *info = link->priv;
+ ide_hwif_t *hwif = info->hwif;
DEBUG(0, "ide_release(0x%p)\n", link);
if (info->ndev) {
/* FIXME: if this fails we need to queue the cleanup somehow
-- need to investigate the required PCMCIA magic */
- ide_unregister(info->hd);
+ ide_unregister(hwif->index);
}
info->ndev = 0;
--
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