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authorNicolas Pitre <nico@cam.org>2007-06-16 02:04:16 -0400
committerPierre Ossman <drzeus@drzeus.cx>2007-09-23 20:26:42 +0200
commitb726126196d54cbbba0924191e5c4dd5ba747fa2 (patch)
tree75d0923f93947e083a7fc77dfa073817a30b1682 /drivers/mmc/core
parent0597007f1b22bbb5d4234ca09c045f9bb2711270 (diff)
sdio: initial CIS parsing code
Signed-off-by: Nicolas Pitre <npitre@mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/core')
-rw-r--r--drivers/mmc/core/Makefile2
-rw-r--r--drivers/mmc/core/sdio.c5
-rw-r--r--drivers/mmc/core/sdio_cis.c119
-rw-r--r--drivers/mmc/core/sdio_cis.h19
4 files changed, 144 insertions, 1 deletions
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index bf7a0024803..05d69fc72c1 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -10,5 +10,5 @@ obj-$(CONFIG_MMC) += mmc_core.o
mmc_core-y := core.o sysfs.o bus.o host.o \
mmc.o mmc_ops.o sd.o sd_ops.o \
sdio.o sdio_ops.o sdio_bus.o \
- sdio_io.o
+ sdio_cis.o sdio_io.o
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index be623856f28..c5baf76146b 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -22,6 +22,7 @@
#include "mmc_ops.h"
#include "sd_ops.h"
#include "sdio_ops.h"
+#include "sdio_cis.h"
static int sdio_read_fbr(struct sdio_func *func)
{
@@ -65,6 +66,10 @@ static int sdio_init_func(struct mmc_card *card, unsigned int fn)
if (ret)
goto fail;
+ ret = sdio_read_cis(func);
+ if (ret)
+ goto fail;
+
card->sdio_func[fn - 1] = func;
return 0;
diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
new file mode 100644
index 00000000000..114b600cd78
--- /dev/null
+++ b/drivers/mmc/core/sdio_cis.c
@@ -0,0 +1,119 @@
+/*
+ * linux/drivers/mmc/core/sdio_cis.c
+ *
+ * Author: Nicolas Pitre
+ * Created: June 11, 2007
+ * Copyright: MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/kernel.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "sdio_cis.h"
+#include "sdio_ops.h"
+
+static int cistpl_manfid(struct sdio_func *func,
+ const unsigned char *buf,
+ unsigned size)
+{
+ /* TPLMID_MANF */
+ func->vendor = buf[0] | (buf[1] << 8);
+
+ /* TPLMID_CARD */
+ func->device = buf[2] | (buf[3] << 8);
+
+ return 0;
+}
+
+struct cis_tpl {
+ unsigned char code;
+ unsigned char min_size;
+ int (*parse)(struct sdio_func *, const unsigned char *buf, unsigned size);
+};
+
+static const struct cis_tpl cis_tpl_list[] = {
+ { 0x15, 3, /* cistpl_vers_1 */ },
+ { 0x20, 4, cistpl_manfid },
+ { 0x21, 2, /* cistpl_funcid */ },
+ { 0x22, 0, /* cistpl_funce */ },
+};
+
+int sdio_read_cis(struct sdio_func *func)
+{
+ int ret;
+ unsigned char *buf;
+ unsigned i, ptr = 0;
+
+ for (i = 0; i < 3; i++) {
+ unsigned char x;
+ ret = mmc_io_rw_direct(func->card, 0, 0,
+ func->num * 0x100 + SDIO_FBR_CIS + i, 0, &x);
+ if (ret)
+ return ret;
+ ptr |= x << (i * 8);
+ }
+
+ buf = kmalloc(256, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ do {
+ unsigned char tpl_code, tpl_link;
+ const struct cis_tpl *tpl;
+
+ ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_code);
+ if (ret)
+ break;
+
+ /* 0xff means we're done */
+ if (tpl_code == 0xff)
+ break;
+
+ ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_link);
+ if (ret)
+ break;
+
+ for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++)
+ if (cis_tpl_list[i].code == tpl_code)
+ break;
+ if (i >= ARRAY_SIZE(cis_tpl_list)) {
+ printk(KERN_WARNING
+ "%s: unknown CIS tuple 0x%02x of length %u\n",
+ sdio_func_id(func), tpl_code, tpl_link);
+ ptr += tpl_link;
+ continue;
+ }
+ tpl = cis_tpl_list + i;
+
+ if (tpl_link < tpl->min_size) {
+ printk(KERN_ERR
+ "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u\n",
+ sdio_func_id(func), tpl_code, tpl_link, tpl->min_size);
+ ret = -EINVAL;
+ break;
+ }
+
+ for (i = 0; i < tpl_link; i++) {
+ ret = mmc_io_rw_direct(func->card, 0, 0, ptr + i, 0, &buf[i]);
+ if (ret)
+ break;
+ }
+ if (ret)
+ break;
+ ptr += tpl_link;
+
+ if (tpl->parse)
+ ret = tpl->parse(func, buf, tpl_link);
+ } while (!ret);
+
+ kfree(buf);
+ return ret;
+}
diff --git a/drivers/mmc/core/sdio_cis.h b/drivers/mmc/core/sdio_cis.h
new file mode 100644
index 00000000000..df21c495d13
--- /dev/null
+++ b/drivers/mmc/core/sdio_cis.h
@@ -0,0 +1,19 @@
+/*
+ * linux/drivers/mmc/core/sdio_cis.h
+ *
+ * Author: Nicolas Pitre
+ * Created: June 11, 2007
+ * Copyright: MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#ifndef _MMC_SDIO_CIS_H
+#define _MMC_SDIO_CIS_H
+
+int sdio_read_cis(struct sdio_func *func);
+
+#endif