[PATCH 5/9] pcmcia: add new CIS access helpers
Dominik Brodowski
linux at dominikbrodowski.net
Sun Oct 18 19:07:31 EDT 2009
As a replacement to pcmcia_get_{first,next}_tuple() and
pcmcia_get_tuple_data(), three new -- and easier to use --
functions are added:
- pcmcia_get_tuple() to get the very first CIS entry of one
type.
- pcmcia_loop_tuple() to loop over all CIS entries of one type.
- pcmcia_get_mac_from_cis() to read out the hardware MAC address
from CISTPL_FUNCE.
Only a handful of drivers need these functions anyway, as most
CIS access is already handled by pcmcia_loop_config(), which
now shares the same backed (pccard_loop_tuple()) with
pcmcia_loop_tuple().
Signed-off-by: Dominik Brodowski <linux at dominikbrodowski.net>
---
Documentation/pcmcia/driver-changes.txt | 7 +
drivers/pcmcia/cistpl.c | 61 +++++++++
drivers/pcmcia/cs_internal.h | 7 +
drivers/pcmcia/pcmcia_resource.c | 213 ++++++++++++++++++++++++++-----
drivers/pcmcia/rsrc_mgr.c | 1 +
include/pcmcia/ds.h | 57 ++++++--
6 files changed, 299 insertions(+), 47 deletions(-)
diff --git a/Documentation/pcmcia/driver-changes.txt b/Documentation/pcmcia/driver-changes.txt
index 0599343..adfb83e 100644
--- a/Documentation/pcmcia/driver-changes.txt
+++ b/Documentation/pcmcia/driver-changes.txt
@@ -1,5 +1,12 @@
This file details changes in 2.6 which affect PCMCIA card driver authors:
+* New CIS tuple access (as of 2.6.33)
+ Instead of pcmcia_get_{first,next}_tuple(), pcmcia_get_tuple_data() and
+ pcmcia_parse_tuple(), a driver shall use "pcmcia_get_tuple()" if it is
+ only interested in one (raw) tuple, or "pcmcia_loop_tuple()" if it is
+ interested in all tuples of one type. To decode the MAC from CISTPL_FUNCE,
+ a new helper "pcmcia_get_mac_from_cis()" was added.
+
* New configuration loop helper (as of 2.6.28)
By calling pcmcia_loop_config(), a driver can iterate over all available
configuration options. During a driver's probe() phase, one doesn't need
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index 6c4a4fc..24dd3c1 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -1482,6 +1482,67 @@ done:
}
EXPORT_SYMBOL(pccard_read_tuple);
+
+/**
+ * pccard_loop_tuple() - loop over tuples in the CIS
+ * @s: the struct pcmcia_socket where the card is inserted
+ * @function: the device function we loop for
+ * @code: which CIS code shall we look for?
+ * @parse: buffer where the tuple shall be parsed (or NULL, if no parse)
+ * @priv_data: private data to be passed to the loop_tuple function.
+ * @loop_tuple: function to call for each CIS entry of type @function. IT
+ * gets passed the raw tuple, the paresed tuple (if @parse is
+ * set) and @priv_data.
+ *
+ * pccard_loop_tuple() loops over all CIS entries of type @function, and
+ * calls the @loop_tuple function for each entry. If the call to @loop_tuple
+ * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
+ */
+int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
+ cisdata_t code, cisparse_t *parse, void *priv_data,
+ int (*loop_tuple) (tuple_t *tuple,
+ cisparse_t *parse,
+ void *priv_data))
+{
+ tuple_t tuple;
+ cisdata_t *buf;
+ int ret;
+
+ buf = kzalloc(256, GFP_KERNEL);
+ if (buf == NULL) {
+ dev_printk(KERN_WARNING, &s->dev, "no memory to read tuple\n");
+ return -ENOMEM;
+ }
+
+ tuple.TupleData = buf;
+ tuple.TupleDataMax = 255;
+ tuple.TupleOffset = 0;
+ tuple.DesiredTuple = code;
+ tuple.Attributes = 0;
+
+ ret = pccard_get_first_tuple(s, function, &tuple);
+ while (!ret) {
+ if (pccard_get_tuple_data(s, &tuple))
+ goto next_entry;
+
+ if (parse)
+ if (pcmcia_parse_tuple(&tuple, parse))
+ goto next_entry;
+
+ ret = loop_tuple(&tuple, parse, priv_data);
+ if (!ret)
+ break;
+
+next_entry:
+ ret = pccard_get_next_tuple(s, function, &tuple);
+ }
+
+ kfree(buf);
+ return ret;
+}
+EXPORT_SYMBOL(pccard_loop_tuple);
+
+
/*======================================================================
This tries to determine if a card has a sensible CIS. It returns
diff --git a/drivers/pcmcia/cs_internal.h b/drivers/pcmcia/cs_internal.h
index 1f4098f..06a14c9 100644
--- a/drivers/pcmcia/cs_internal.h
+++ b/drivers/pcmcia/cs_internal.h
@@ -199,6 +199,13 @@ int pcmcia_replace_cis(struct pcmcia_socket *s,
const u8 *data, const size_t len);
int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *count);
+/* loop over CIS entries */
+int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
+ cisdata_t code, cisparse_t *parse, void *priv_data,
+ int (*loop_tuple) (tuple_t *tuple,
+ cisparse_t *parse,
+ void *priv_data));
+
/* rsrc_mgr.c */
int pcmcia_validate_mem(struct pcmcia_socket *s);
struct resource *pcmcia_find_io_region(unsigned long base,
diff --git a/drivers/pcmcia/pcmcia_resource.c b/drivers/pcmcia/pcmcia_resource.c
index d919e96..16650df 100644
--- a/drivers/pcmcia/pcmcia_resource.c
+++ b/drivers/pcmcia/pcmcia_resource.c
@@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/device.h>
+#include <linux/netdevice.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
@@ -885,13 +886,40 @@ EXPORT_SYMBOL(pcmcia_disable_device);
struct pcmcia_cfg_mem {
- tuple_t tuple;
+ struct pcmcia_device *p_dev;
+ void *priv_data;
+ int (*conf_check) (struct pcmcia_device *p_dev,
+ cistpl_cftable_entry_t *cfg,
+ cistpl_cftable_entry_t *dflt,
+ unsigned int vcc,
+ void *priv_data);
cisparse_t parse;
- u8 buf[256];
cistpl_cftable_entry_t dflt;
};
/**
+ * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
+ *
+ * pcmcia_do_loop_config() is the internal callback for the call from
+ * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
+ * by a struct pcmcia_cfg_mem.
+ */
+static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
+{
+ cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
+ struct pcmcia_cfg_mem *cfg_mem = priv;
+
+ /* default values */
+ cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
+ if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
+ cfg_mem->dflt = *cfg;
+
+ return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
+ cfg_mem->p_dev->socket->socket.Vcc,
+ cfg_mem->priv_data);
+}
+
+/**
* pcmcia_loop_config() - loop over configuration options
* @p_dev: the struct pcmcia_device which we need to loop for.
* @conf_check: function to call for each configuration option.
@@ -913,48 +941,167 @@ int pcmcia_loop_config(struct pcmcia_device *p_dev,
void *priv_data)
{
struct pcmcia_cfg_mem *cfg_mem;
-
- tuple_t *tuple;
int ret;
- unsigned int vcc;
cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
if (cfg_mem == NULL)
return -ENOMEM;
- /* get the current Vcc setting */
- vcc = p_dev->socket->socket.Vcc;
+ cfg_mem->p_dev = p_dev;
+ cfg_mem->conf_check = conf_check;
+ cfg_mem->priv_data = priv_data;
- tuple = &cfg_mem->tuple;
- tuple->TupleData = cfg_mem->buf;
- tuple->TupleDataMax = 255;
- tuple->TupleOffset = 0;
- tuple->DesiredTuple = CISTPL_CFTABLE_ENTRY;
- tuple->Attributes = 0;
+ ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
+ CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
+ cfg_mem, pcmcia_do_loop_config);
- ret = pcmcia_get_first_tuple(p_dev, tuple);
- while (!ret) {
- cistpl_cftable_entry_t *cfg = &cfg_mem->parse.cftable_entry;
+ kfree(cfg_mem);
+ return ret;
+}
+EXPORT_SYMBOL(pcmcia_loop_config);
- if (pcmcia_get_tuple_data(p_dev, tuple))
- goto next_entry;
- if (pcmcia_parse_tuple(tuple, &cfg_mem->parse))
- goto next_entry;
+struct pcmcia_loop_mem {
+ struct pcmcia_device *p_dev;
+ void *priv_data;
+ int (*loop_tuple) (struct pcmcia_device *p_dev,
+ tuple_t *tuple,
+ void *priv_data);
+};
- /* default values */
- p_dev->conf.ConfigIndex = cfg->index;
- if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
- cfg_mem->dflt = *cfg;
+/**
+ * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
+ *
+ * pcmcia_do_loop_tuple() is the internal callback for the call from
+ * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
+ * by a struct pcmcia_cfg_mem.
+ */
+static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
+{
+ struct pcmcia_loop_mem *loop = priv;
- ret = conf_check(p_dev, cfg, &cfg_mem->dflt, vcc, priv_data);
- if (!ret)
- break;
+ return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
+};
-next_entry:
- ret = pcmcia_get_next_tuple(p_dev, tuple);
- }
+/**
+ * pcmcia_loop_tuple() - loop over tuples in the CIS
+ * @p_dev: the struct pcmcia_device which we need to loop for.
+ * @code: which CIS code shall we look for?
+ * @priv_data: private data to be passed to the loop_tuple function.
+ * @loop_tuple: function to call for each CIS entry of type @function. IT
+ * gets passed the raw tuple and @priv_data.
+ *
+ * pcmcia_loop_tuple() loops over all CIS entries of type @function, and
+ * calls the @loop_tuple function for each entry. If the call to @loop_tuple
+ * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
+ */
+int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
+ int (*loop_tuple) (struct pcmcia_device *p_dev,
+ tuple_t *tuple,
+ void *priv_data),
+ void *priv_data)
+{
+ struct pcmcia_loop_mem loop = {
+ .p_dev = p_dev,
+ .loop_tuple = loop_tuple,
+ .priv_data = priv_data};
+
+ return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
+ &loop, pcmcia_do_loop_tuple);
+};
+EXPORT_SYMBOL(pcmcia_loop_tuple);
+
+
+struct pcmcia_loop_get {
+ size_t len;
+ cisdata_t **buf;
+};
+
+/**
+ * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
+ *
+ * pcmcia_do_get_tuple() is the internal callback for the call from
+ * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
+ * the first tuple, return 0 unconditionally. Create a memory buffer large
+ * enough to hold the content of the tuple, and fill it with the tuple data.
+ * The caller is responsible to free the buffer.
+ */
+static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
+ void *priv)
+{
+ struct pcmcia_loop_get *get = priv;
+
+ *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
+ if (*get->buf)
+ get->len = tuple->TupleDataLen;
+ memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
+
+ return 0;
+};
+
+/**
+ * pcmcia_get_tuple() - get first tuple from CIS
+ * @p_dev: the struct pcmcia_device which we need to loop for.
+ * @code: which CIS code shall we look for?
+ * @buf: pointer to store the buffer to.
+ *
+ * pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
+ * It returns the buffer length (or zero). The caller is responsible to free
+ * the buffer passed in @buf.
+ */
+size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
+ unsigned char **buf)
+{
+ struct pcmcia_loop_get get = {
+ .len = 0,
+ .buf = buf,
+ };
+
+ *get.buf = NULL;
+ pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
+
+ return get.len;
+};
+EXPORT_SYMBOL(pcmcia_get_tuple);
+
+
+/**
+ * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
+ *
+ * pcmcia_do_get_mac() is the internal callback for the call from
+ * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
+ * tuple contains a proper LAN_NODE_ID of length 6, and copy the data
+ * to struct net_device->dev_addr[i].
+ */
+static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
+ void *priv)
+{
+ struct net_device *dev = priv;
+ int i;
+
+ if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
+ return -EINVAL;
+ if (tuple->TupleDataLen != ETH_ALEN + 2)
+ return -EINVAL;
+ if (tuple->TupleData[1] != ETH_ALEN)
+ return -EINVAL;
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = tuple->TupleData[i+2];
+ return 0;
+};
+
+/**
+ * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
+ * @p_dev: the struct pcmcia_device for which we want the address.
+ * @dev: a properly prepared struct net_device to store the info to.
+ *
+ * pcmcia_get_mac_from_cis() reads out the hardware MAC address from
+ * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
+ * must be set up properly by the driver (see examples!).
+ */
+int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
+{
+ return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
+};
+EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
- return ret;
-}
-EXPORT_SYMBOL(pcmcia_loop_config);
diff --git a/drivers/pcmcia/rsrc_mgr.c b/drivers/pcmcia/rsrc_mgr.c
index e592e0e..de0e770 100644
--- a/drivers/pcmcia/rsrc_mgr.c
+++ b/drivers/pcmcia/rsrc_mgr.c
@@ -18,6 +18,7 @@
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
#include "cs_internal.h"
diff --git a/include/pcmcia/ds.h b/include/pcmcia/ds.h
index a2be80b..2eb6e24 100644
--- a/include/pcmcia/ds.h
+++ b/include/pcmcia/ds.h
@@ -34,6 +34,7 @@
struct pcmcia_socket;
struct pcmcia_device;
struct config_t;
+struct net_device;
/* dynamic device IDs for PCMCIA device drivers. See
* Documentation/pcmcia/driver.txt for details.
@@ -176,26 +177,39 @@ const char *pcmcia_error_ret(int ret);
pcmcia_error_ret(ret)); \
}
-/* CIS access.
- * Use the pcmcia_* versions in PCMCIA drivers
+
+/*
+ * CIS access.
+ *
+ * Please use the following functions to access CIS tuples:
+ * - pcmcia_get_tuple()
+ * - pcmcia_loop_tuple()
+ * - pcmcia_get_mac_from_cis()
+ *
+ * To parse a tuple_t, pcmcia_parse_tuple() exists. Its interface
+ * might change in future.
*/
-int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse);
-int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
- tuple_t *tuple);
-#define pcmcia_get_first_tuple(p_dev, tuple) \
- pccard_get_first_tuple(p_dev->socket, p_dev->func, tuple)
+/* get the very first CIS entry of type @code. Note that buf is pointer
+ * to u8 *buf; and that you need to kfree(buf) afterwards. */
+size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
+ u8 **buf);
-int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function,
- tuple_t *tuple);
-#define pcmcia_get_next_tuple(p_dev, tuple) \
- pccard_get_next_tuple(p_dev->socket, p_dev->func, tuple)
+/* loop over CIS entries */
+int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
+ int (*loop_tuple) (struct pcmcia_device *p_dev,
+ tuple_t *tuple,
+ void *priv_data),
+ void *priv_data);
-int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple);
-#define pcmcia_get_tuple_data(p_dev, tuple) \
- pccard_get_tuple_data(p_dev->socket, tuple)
+/* get the MAC address from CISTPL_FUNCE */
+int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev,
+ struct net_device *dev);
+/* parse a tuple_t */
+int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse);
+
/* loop CIS entries for valid configuration */
int pcmcia_loop_config(struct pcmcia_device *p_dev,
int (*conf_check) (struct pcmcia_device *p_dev,
@@ -215,6 +229,21 @@ int pcmcia_reset_card(struct pcmcia_socket *skt);
int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
conf_reg_t *reg);
+/* deprecated -- do not use in drivers. */
+int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
+ tuple_t *tuple);
+#define pcmcia_get_first_tuple(p_dev, tuple) \
+ pccard_get_first_tuple(p_dev->socket, p_dev->func, tuple)
+
+int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function,
+ tuple_t *tuple);
+#define pcmcia_get_next_tuple(p_dev, tuple) \
+ pccard_get_next_tuple(p_dev->socket, p_dev->func, tuple)
+
+int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple);
+#define pcmcia_get_tuple_data(p_dev, tuple) \
+ pccard_get_tuple_data(p_dev->socket, tuple)
+
/* device configuration */
int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req);
int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req);
--
1.6.0.4
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