pcmcia: use struct resource for PCMCIA devices

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>

1 files changed, 78 insertions, 63 deletions

diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index 563750e77eaf..fcd48dae79bc 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -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;
+
+        res->flags |= IORESOURCE_IO;
 
-        align = (*base) ? (lines ? 1<<lines : 0) : 1;
+        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);
@@ -329,31 +346,25 @@ 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;
 
-        p_dev->_io = 0;
+        c = p_dev->function_config;
 
-        if ((c->io.BasePort1 != req->BasePort1) ||
-            (c->io.NumPorts1 != req->NumPorts1) ||
-            (c->io.BasePort2 != req->BasePort2) ||
-            (c->io.NumPorts2 != req->NumPorts2))
-                goto out;
+        release_io_space(s, &c->io[0]);
 
-        c->state &= ~CONFIG_IO_REQ;
+        if (c->io[1].end)
+                release_io_space(s, &c->io[1]);
 
-        release_io_space(s, req->BasePort1, req->NumPorts1);
-        if (req->NumPorts2)
-                release_io_space(s, req->BasePort2, req->NumPorts2);
+        p_dev->_io = 0;
+        c->state &= ~CONFIG_IO_REQ;
 
 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
+ *
+ * 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.
  *
- * Request_io() reserves ranges of port addresses for a socket.
- * I have not implemented range sharing or alias addressing.
+ * 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;