sdio: initial CIS parsing code

Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

4 files changed, 144 insertions, 1 deletions

diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index bf7a00248039..05d69fc72c18 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 be623856f288..c5baf76146b2 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 000000000000..114b600cd788
--- /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 000000000000..df21c495d133
--- /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