From b1538bcf75e2e11459947ec4d4329ed04fbe2b2c Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Sat, 16 Jun 2007 02:06:47 -0400 Subject: [PATCH] sdio: link unknown CIS tuples to the sdio_func structure This way those tuples that the core cares about are consumed by the core code, and tuples that only function drivers might make sense of are available to drivers. Signed-off-by: Nicolas Pitre Signed-off-by: Pierre Ossman --- drivers/mmc/core/sdio_bus.c | 3 ++ drivers/mmc/core/sdio_cis.c | 83 +++++++++++++++++++++++------------ drivers/mmc/core/sdio_cis.h | 1 + include/linux/mmc/sdio_func.h | 12 +++++ 4 files changed, 70 insertions(+), 29 deletions(-) diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c index fa488cea859..78e0381f55a 100644 --- a/drivers/mmc/core/sdio_bus.c +++ b/drivers/mmc/core/sdio_bus.c @@ -17,6 +17,7 @@ #include #include +#include "sdio_cis.h" #include "sdio_bus.h" #define dev_to_sdio_func(d) container_of(d, struct sdio_func, dev) @@ -94,6 +95,8 @@ static void sdio_release_func(struct device *dev) { struct sdio_func *func = dev_to_sdio_func(dev); + sdio_free_cis(func); + kfree(func); } diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c index 114b600cd78..b6c7342572c 100644 --- a/drivers/mmc/core/sdio_cis.c +++ b/drivers/mmc/core/sdio_cis.c @@ -5,6 +5,8 @@ * Created: June 11, 2007 * Copyright: MontaVista Software Inc. * + * Copyright 2007 Pierre Ossman + * * 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 @@ -49,7 +51,7 @@ static const struct cis_tpl cis_tpl_list[] = { int sdio_read_cis(struct sdio_func *func) { int ret; - unsigned char *buf; + struct sdio_func_tuple *this, **prev; unsigned i, ptr = 0; for (i = 0; i < 3; i++) { @@ -61,13 +63,11 @@ int sdio_read_cis(struct sdio_func *func) ptr |= x << (i * 8); } - buf = kmalloc(256, GFP_KERNEL); - if (!buf) - return -ENOMEM; + /* find the list tail */ + for (prev = &func->tuples; *prev; prev = &(*prev)->next); 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) @@ -81,39 +81,64 @@ int sdio_read_cis(struct sdio_func *func) if (ret) break; - for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++) - if (cis_tpl_list[i].code == tpl_code) + this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL); + if (!this) + return -ENOMEM; + + for (i = 0; i < tpl_link; i++) { + ret = mmc_io_rw_direct(func->card, 0, 0, + ptr + i, 0, &this->data[i]); + if (ret) 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; + if (ret) { + kfree(this); break; } - for (i = 0; i < tpl_link; i++) { - ret = mmc_io_rw_direct(func->card, 0, 0, ptr + i, 0, &buf[i]); - if (ret) + 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)) { + /* this tuple is unknown to the core */ + this->next = NULL; + this->code = tpl_code; + this->size = tpl_link; + *prev = this; + prev = &this->next; + printk(KERN_DEBUG + "%s: queuing CIS tuple 0x%02x length %u\n", + sdio_func_id(func), tpl_code, tpl_link); + } else { + const struct cis_tpl *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; + } else if (tpl->parse) + ret = tpl->parse(func, this->data, tpl_link); + kfree(this); } - if (ret) - break; - ptr += tpl_link; - if (tpl->parse) - ret = tpl->parse(func, buf, tpl_link); + ptr += tpl_link; } while (!ret); - kfree(buf); return ret; } + +void sdio_free_cis(struct sdio_func *func) +{ + struct sdio_func_tuple *tuple, *victim; + + tuple = func->tuples; + + while (tuple) { + victim = tuple; + tuple = tuple->next; + kfree(victim); + } + + func->tuples = NULL; +} + diff --git a/drivers/mmc/core/sdio_cis.h b/drivers/mmc/core/sdio_cis.h index df21c495d13..863d3d51637 100644 --- a/drivers/mmc/core/sdio_cis.h +++ b/drivers/mmc/core/sdio_cis.h @@ -15,5 +15,6 @@ #define _MMC_SDIO_CIS_H int sdio_read_cis(struct sdio_func *func); +void sdio_free_cis(struct sdio_func *func); #endif diff --git a/include/linux/mmc/sdio_func.h b/include/linux/mmc/sdio_func.h index 4164809a8e6..269067663c8 100644 --- a/include/linux/mmc/sdio_func.h +++ b/include/linux/mmc/sdio_func.h @@ -14,6 +14,16 @@ struct mmc_card; +/* + * SDIO function CIS tuple (unknown to the core) + */ +struct sdio_func_tuple { + struct sdio_func_tuple *next; + unsigned char code; + unsigned char size; + unsigned char data[0]; +}; + /* * SDIO function devices */ @@ -28,6 +38,8 @@ struct sdio_func { unsigned int state; /* function state */ #define SDIO_STATE_PRESENT (1<<0) /* present in sysfs */ + + struct sdio_func_tuple *tuples; }; #define sdio_func_present(f) ((f)->state & SDIO_STATE_PRESENT) -- 2.20.1