6b13f685e
김민수
BSP 최초 추가
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#include <linux/types.h>
#include <linux/crc32.h>
#include <linux/swab.h>
#include "rsxx_priv.h"
#include "rsxx_cfg.h"
static void initialize_config(struct rsxx_card_cfg *cfg)
{
cfg->hdr.version = RSXX_CFG_VERSION;
cfg->data.block_size = RSXX_HW_BLK_SIZE;
cfg->data.stripe_size = RSXX_HW_BLK_SIZE;
cfg->data.vendor_id = RSXX_VENDOR_ID_IBM;
cfg->data.cache_order = (-1);
cfg->data.intr_coal.mode = RSXX_INTR_COAL_DISABLED;
cfg->data.intr_coal.count = 0;
cfg->data.intr_coal.latency = 0;
}
static u32 config_data_crc32(struct rsxx_card_cfg *cfg)
{
return ~crc32(~0, &cfg->data, sizeof(cfg->data));
}
static void config_hdr_be_to_cpu(struct card_cfg_hdr *hdr)
{
hdr->version = be32_to_cpu((__force __be32) hdr->version);
hdr->crc = be32_to_cpu((__force __be32) hdr->crc);
}
static void config_hdr_cpu_to_be(struct card_cfg_hdr *hdr)
{
hdr->version = (__force u32) cpu_to_be32(hdr->version);
hdr->crc = (__force u32) cpu_to_be32(hdr->crc);
}
static void config_data_swab(struct rsxx_card_cfg *cfg)
{
u32 *data = (u32 *) &cfg->data;
int i;
for (i = 0; i < (sizeof(cfg->data) / 4); i++)
data[i] = swab32(data[i]);
}
static void config_data_le_to_cpu(struct rsxx_card_cfg *cfg)
{
u32 *data = (u32 *) &cfg->data;
int i;
for (i = 0; i < (sizeof(cfg->data) / 4); i++)
data[i] = le32_to_cpu((__force __le32) data[i]);
}
static void config_data_cpu_to_le(struct rsxx_card_cfg *cfg)
{
u32 *data = (u32 *) &cfg->data;
int i;
for (i = 0; i < (sizeof(cfg->data) / 4); i++)
data[i] = (__force u32) cpu_to_le32(data[i]);
}
static int rsxx_save_config(struct rsxx_cardinfo *card)
{
struct rsxx_card_cfg cfg;
int st;
memcpy(&cfg, &card->config, sizeof(cfg));
if (unlikely(cfg.hdr.version != RSXX_CFG_VERSION)) {
dev_err(CARD_TO_DEV(card),
"Cannot save config with invalid version %d
",
cfg.hdr.version);
return -EINVAL;
}
config_data_cpu_to_le(&cfg);
cfg.hdr.crc = config_data_crc32(&cfg);
config_data_swab(&cfg);
config_hdr_cpu_to_be(&cfg.hdr);
st = rsxx_creg_write(card, CREG_ADD_CONFIG, sizeof(cfg), &cfg, 1);
if (st)
return st;
return 0;
}
int rsxx_load_config(struct rsxx_cardinfo *card)
{
int st;
u32 crc;
st = rsxx_creg_read(card, CREG_ADD_CONFIG, sizeof(card->config),
&card->config, 1);
if (st) {
dev_err(CARD_TO_DEV(card),
"Failed reading card config.
");
return st;
}
config_hdr_be_to_cpu(&card->config.hdr);
if (card->config.hdr.version == RSXX_CFG_VERSION) {
config_data_swab(&card->config);
crc = config_data_crc32(&card->config);
if (crc != card->config.hdr.crc) {
dev_err(CARD_TO_DEV(card),
"Config corruption detected!
");
dev_info(CARD_TO_DEV(card),
"CRC (sb x%08x is x%08x)
",
card->config.hdr.crc, crc);
return -EIO;
}
config_data_le_to_cpu(&card->config);
} else if (card->config.hdr.version != 0) {
dev_err(CARD_TO_DEV(card),
"Invalid config version %d.
",
card->config.hdr.version);
return -EINVAL;
} else {
dev_info(CARD_TO_DEV(card),
"Initializing card configuration.
");
initialize_config(&card->config);
st = rsxx_save_config(card);
if (st)
return st;
}
card->config_valid = 1;
dev_dbg(CARD_TO_DEV(card), "version: x%08x
",
card->config.hdr.version);
dev_dbg(CARD_TO_DEV(card), "crc: x%08x
",
card->config.hdr.crc);
dev_dbg(CARD_TO_DEV(card), "block_size: x%08x
",
card->config.data.block_size);
dev_dbg(CARD_TO_DEV(card), "stripe_size: x%08x
",
card->config.data.stripe_size);
dev_dbg(CARD_TO_DEV(card), "vendor_id: x%08x
",
card->config.data.vendor_id);
dev_dbg(CARD_TO_DEV(card), "cache_order: x%08x
",
card->config.data.cache_order);
dev_dbg(CARD_TO_DEV(card), "mode: x%08x
",
card->config.data.intr_coal.mode);
dev_dbg(CARD_TO_DEV(card), "count: x%08x
",
card->config.data.intr_coal.count);
dev_dbg(CARD_TO_DEV(card), "latency: x%08x
",
card->config.data.intr_coal.latency);
return 0;
}
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