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mtd: nand: mxc: reorder functions to avoid forward declarations 

We'll call copy_spare() and mxc_do_addr_cycle() from another place
during the next patches, so move functions up to avoid forward
declarations.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Sascha Hauer 2018-01-17 12:32:06 +01:00 committed by Boris Brezillon
parent 7928b2cbe5
commit 1549333167
1 changed files with 103 additions and 103 deletions
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206
drivers/mtd/nand/mxc_nand.c
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@ -252,6 +252,109 @@ static void memcpy16_toio(void __iomem *trg, const void *src, int size)
__raw_writew(*s++, t++);
}
/*
* The controller splits a page into data chunks of 512 bytes + partial oob.
* There are writesize / 512 such chunks, the size of the partial oob parts is
* oobsize / #chunks rounded down to a multiple of 2. The last oob chunk then
* contains additionally the byte lost by rounding (if any).
* This function handles the needed shuffling between host->data_buf (which
* holds a page in natural order, i.e. writesize bytes data + oobsize bytes
* spare) and the NFC buffer.
*/
static void copy_spare(struct mtd_info *mtd, bool bfrom)
{
struct nand_chip *this = mtd_to_nand(mtd);
struct mxc_nand_host *host = nand_get_controller_data(this);
u16 i, oob_chunk_size;
u16 num_chunks = mtd->writesize / 512;
u8 *d = host->data_buf + mtd->writesize;
u8 __iomem *s = host->spare0;
u16 sparebuf_size = host->devtype_data->spare_len;
/* size of oob chunk for all but possibly the last one */
oob_chunk_size = (host->used_oobsize / num_chunks) & ~1;
if (bfrom) {
for (i = 0; i < num_chunks - 1; i++)
memcpy16_fromio(d + i * oob_chunk_size,
s + i * sparebuf_size,
oob_chunk_size);
/* the last chunk */
memcpy16_fromio(d + i * oob_chunk_size,
s + i * sparebuf_size,
host->used_oobsize - i * oob_chunk_size);
} else {
for (i = 0; i < num_chunks - 1; i++)
memcpy16_toio(&s[i * sparebuf_size],
&d[i * oob_chunk_size],
oob_chunk_size);
/* the last chunk */
memcpy16_toio(&s[i * sparebuf_size],
&d[i * oob_chunk_size],
host->used_oobsize - i * oob_chunk_size);
}
}
/*
* MXC NANDFC can only perform full page+spare or spare-only read/write. When
* the upper layers perform a read/write buf operation, the saved column address
* is used to index into the full page. So usually this function is called with
* column == 0 (unless no column cycle is needed indicated by column == -1)
*/
static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct mxc_nand_host *host = nand_get_controller_data(nand_chip);
/* Write out column address, if necessary */
if (column != -1) {
host->devtype_data->send_addr(host, column & 0xff,
page_addr == -1);
if (mtd->writesize > 512)
/* another col addr cycle for 2k page */
host->devtype_data->send_addr(host,
(column >> 8) & 0xff,
false);
}
/* Write out page address, if necessary */
if (page_addr != -1) {
/* paddr_0 - p_addr_7 */
host->devtype_data->send_addr(host, (page_addr & 0xff), false);
if (mtd->writesize > 512) {
if (mtd->size >= 0x10000000) {
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff,
false);
host->devtype_data->send_addr(host,
(page_addr >> 16) & 0xff,
true);
} else
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff, true);
} else {
if (nand_chip->options & NAND_ROW_ADDR_3) {
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff,
false);
host->devtype_data->send_addr(host,
(page_addr >> 16) & 0xff,
true);
} else
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff, true);
}
}
}
static int check_int_v3(struct mxc_nand_host *host)
{
uint32_t tmp;
@ -772,109 +875,6 @@ static void mxc_nand_select_chip_v2(struct mtd_info *mtd, int chip)
writew(host->active_cs << 4, NFC_V1_V2_BUF_ADDR);
}
/*
* The controller splits a page into data chunks of 512 bytes + partial oob.
* There are writesize / 512 such chunks, the size of the partial oob parts is
* oobsize / #chunks rounded down to a multiple of 2. The last oob chunk then
* contains additionally the byte lost by rounding (if any).
* This function handles the needed shuffling between host->data_buf (which
* holds a page in natural order, i.e. writesize bytes data + oobsize bytes
* spare) and the NFC buffer.
*/
static void copy_spare(struct mtd_info *mtd, bool bfrom)
{
struct nand_chip *this = mtd_to_nand(mtd);
struct mxc_nand_host *host = nand_get_controller_data(this);
u16 i, oob_chunk_size;
u16 num_chunks = mtd->writesize / 512;
u8 *d = host->data_buf + mtd->writesize;
u8 __iomem *s = host->spare0;
u16 sparebuf_size = host->devtype_data->spare_len;
/* size of oob chunk for all but possibly the last one */
oob_chunk_size = (host->used_oobsize / num_chunks) & ~1;
if (bfrom) {
for (i = 0; i < num_chunks - 1; i++)
memcpy16_fromio(d + i * oob_chunk_size,
s + i * sparebuf_size,
oob_chunk_size);
/* the last chunk */
memcpy16_fromio(d + i * oob_chunk_size,
s + i * sparebuf_size,
host->used_oobsize - i * oob_chunk_size);
} else {
for (i = 0; i < num_chunks - 1; i++)
memcpy16_toio(&s[i * sparebuf_size],
&d[i * oob_chunk_size],
oob_chunk_size);
/* the last chunk */
memcpy16_toio(&s[i * sparebuf_size],
&d[i * oob_chunk_size],
host->used_oobsize - i * oob_chunk_size);
}
}
/*
* MXC NANDFC can only perform full page+spare or spare-only read/write. When
* the upper layers perform a read/write buf operation, the saved column address
* is used to index into the full page. So usually this function is called with
* column == 0 (unless no column cycle is needed indicated by column == -1)
*/
static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct mxc_nand_host *host = nand_get_controller_data(nand_chip);
/* Write out column address, if necessary */
if (column != -1) {
host->devtype_data->send_addr(host, column & 0xff,
page_addr == -1);
if (mtd->writesize > 512)
/* another col addr cycle for 2k page */
host->devtype_data->send_addr(host,
(column >> 8) & 0xff,
false);
}
/* Write out page address, if necessary */
if (page_addr != -1) {
/* paddr_0 - p_addr_7 */
host->devtype_data->send_addr(host, (page_addr & 0xff), false);
if (mtd->writesize > 512) {
if (mtd->size >= 0x10000000) {
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff,
false);
host->devtype_data->send_addr(host,
(page_addr >> 16) & 0xff,
true);
} else
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff, true);
} else {
if (nand_chip->options & NAND_ROW_ADDR_3) {
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff,
false);
host->devtype_data->send_addr(host,
(page_addr >> 16) & 0xff,
true);
} else
/* paddr_8 - paddr_15 */
host->devtype_data->send_addr(host,
(page_addr >> 8) & 0xff, true);
}
}
}
#define MXC_V1_ECCBYTES 5
static int mxc_v1_ooblayout_ecc(struct mtd_info *mtd, int section,