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pcmcia: use struct resource for PCMCIA devices

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Introduce a new field into struct pcmcia_device named "resource" and of
type struct resource *, which contains the IO port ranges allocated for
this device. Memory window ranges and registration with the resource
trees will follow at a later date.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Dominik Brodowski
2010-07-24 13:14:44 +02:00
parent 3dace8cf15
commit 2ce4905e4d
5 changed files with 96 additions and 74 deletions
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143
drivers/pcmcia/pcmcia_resource.c
View File

@@ -60,43 +60,60 @@ struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
*
* Special stuff for managing IO windows, because they are scarce
*/
static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
unsigned int *base, unsigned int num, u_int lines)
static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
unsigned int lines)
{
unsigned int align;
unsigned int base = res->start;
unsigned int num = res->end;
int ret;
align = (*base) ? (lines ? 1<<lines : 0) : 1;
res->flags |= IORESOURCE_IO;
dev_dbg(&s->dev, "alloc_io_space request for %pR\n", res);
align = base ? (lines ? 1<<lines : 0) : 1;
if (align && (align < num)) {
if (*base) {
dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
num, align);
if (base) {
dev_dbg(&s->dev, "odd IO request\n");
align = 0;
} else
while (align && (align < num))
align <<= 1;
}
if (*base & ~(align-1)) {
dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
*base, align);
if (base & ~(align-1)) {
dev_dbg(&s->dev, "odd IO request\n");
align = 0;
}
return s->resource_ops->find_io(s, attr, base, num, align);
ret = s->resource_ops->find_io(s, res->flags, &base, num, align);
if (ret) {
dev_dbg(&s->dev, "alloc_io_space request returned %d", ret);
return -EINVAL;
}
res->start = base;
res->end = res->start + num - 1;
dev_dbg(&s->dev, "alloc_io_space request returned %pR, %d\n", res, ret);
return 0;
} /* alloc_io_space */
static void release_io_space(struct pcmcia_socket *s, unsigned int base,
unsigned int num)
static void release_io_space(struct pcmcia_socket *s, struct resource *res)
{
resource_size_t num = resource_size(res);
int i;
dev_dbg(&s->dev, "release_io_space for %pR\n", res);
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
continue;
if ((s->io[i].res->start <= base) &&
(s->io[i].res->end >= base+num-1)) {
if ((s->io[i].res->start <= res->start) &&
(s->io[i].res->end >= res->end)) {
s->io[i].InUse -= num;
res->start = res->end = 0;
res->flags = IORESOURCE_IO;
/* Free the window if no one else is using it */
if (s->io[i].InUse == 0) {
release_resource(s->io[i].res);
@@ -329,32 +346,26 @@ int pcmcia_release_configuration(struct pcmcia_device *p_dev)
* don't bother checking the port ranges against the current socket
* values.
*/
static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
static int pcmcia_release_io(struct pcmcia_device *p_dev)
{
struct pcmcia_socket *s = p_dev->socket;
int ret = -EINVAL;
config_t *c;
mutex_lock(&s->ops_mutex);
c = p_dev->function_config;
if (!p_dev->_io)
goto out;
c = p_dev->function_config;
release_io_space(s, &c->io[0]);
if (c->io[1].end)
release_io_space(s, &c->io[1]);
p_dev->_io = 0;
if ((c->io.BasePort1 != req->BasePort1) ||
(c->io.NumPorts1 != req->NumPorts1) ||
(c->io.BasePort2 != req->BasePort2) ||
(c->io.NumPorts2 != req->NumPorts2))
goto out;
c->state &= ~CONFIG_IO_REQ;
release_io_space(s, req->BasePort1, req->NumPorts1);
if (req->NumPorts2)
release_io_space(s, req->BasePort2, req->NumPorts2);
out:
mutex_unlock(&s->ops_mutex);
@@ -486,13 +497,13 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev,
pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
}
if (req->Present & PRESENT_IOBASE_0) {
u_char b = c->io.BasePort1 & 0xff;
u8 b = c->io[0].start & 0xff;
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
b = (c->io.BasePort1 >> 8) & 0xff;
b = (c->io[0].start >> 8) & 0xff;
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
}
if (req->Present & PRESENT_IOSIZE) {
u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1;
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
}
@@ -526,28 +537,42 @@ int pcmcia_request_configuration(struct pcmcia_device *p_dev,
EXPORT_SYMBOL(pcmcia_request_configuration);
/** pcmcia_request_io
/**
* pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices
*
* Request_io() reserves ranges of port addresses for a socket.
* I have not implemented range sharing or alias addressing.
* pcmcia_request_io() attepts to reserve the IO port ranges specified in
* struct pcmcia_device *p_dev->resource[0] and *p_dev->resource[1]. The
* "start" value is the requested start of the IO port resource; "end"
* relfects the number of ports requested.
*
* If io_req_t is passed, those values are converted automatically.
*/
int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
{
struct pcmcia_socket *s = p_dev->socket;
config_t *c;
int ret = -EINVAL;
unsigned int lines = req->IOAddrLines;
mutex_lock(&s->ops_mutex);
if (!(s->state & SOCKET_PRESENT)) {
dev_dbg(&s->dev, "No card present\n");
dev_dbg(&s->dev, "pcmcia_request_io: No card present\n");
goto out;
}
if (!req)
goto out;
c = p_dev->function_config;
if (req) {
c->io[0].start = req->BasePort1;
c->io[0].end = req->NumPorts1;
c->io[0].flags |= req->Attributes1;
c->io[1].start = req->BasePort2;
c->io[1].end = req->NumPorts2;
c->io[1].flags |= req->Attributes2;
}
dev_dbg(&s->dev, "pcmcia_request_io: %pR , %pR", &c->io[0], &c->io[1]);
if (c->state & CONFIG_LOCKED) {
dev_dbg(&s->dev, "Configuration is locked\n");
goto out;
@@ -556,40 +581,30 @@ int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
dev_dbg(&s->dev, "IO already configured\n");
goto out;
}
if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
dev_dbg(&s->dev, "bad attribute setting for IO region 1\n");
goto out;
}
if ((req->NumPorts2 > 0) &&
(req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
dev_dbg(&s->dev, "bad attribute setting for IO region 2\n");
goto out;
}
dev_dbg(&s->dev, "trying to allocate resource 1\n");
ret = alloc_io_space(s, req->Attributes1, &req->BasePort1,
req->NumPorts1, req->IOAddrLines);
if (ret) {
dev_dbg(&s->dev, "allocation of resource 1 failed\n");
ret = alloc_io_space(s, &c->io[0], lines);
if (ret)
goto out;
}
if (req->NumPorts2) {
dev_dbg(&s->dev, "trying to allocate resource 2\n");
ret = alloc_io_space(s, req->Attributes2, &req->BasePort2,
req->NumPorts2, req->IOAddrLines);
if (c->io[1].end) {
ret = alloc_io_space(s, &c->io[1], lines);
if (ret) {
dev_dbg(&s->dev, "allocation of resource 2 failed\n");
release_io_space(s, req->BasePort1, req->NumPorts1);
release_io_space(s, &c->io[0]);
goto out;
}
}
} else
c->io[1].start = 0;
c->io = *req;
c->state |= CONFIG_IO_REQ;
p_dev->_io = 1;
dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret);
if (!ret) {
req->BasePort1 = c->io[0].start;
req->BasePort2 = c->io[1].start;
}
dev_dbg(&s->dev, "pcmcia_request_io succeeded: %pR , %pR",
&c->io[0], &c->io[1]);
out:
mutex_unlock(&s->ops_mutex);
@@ -869,7 +884,7 @@ EXPORT_SYMBOL(pcmcia_request_window);
void pcmcia_disable_device(struct pcmcia_device *p_dev)
{
pcmcia_release_configuration(p_dev);
pcmcia_release_io(p_dev, &p_dev->io);
pcmcia_release_io(p_dev);
if (p_dev->_irq) {
free_irq(p_dev->irq, p_dev->priv);
p_dev->_irq = 0;