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提交 d8ef2b73 编写于 作者: B Boris Brezillon 提交者： Miquel Raynal
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mtd: rawnand: diskonchip: Get rid of the legacy interface implementation 

Now that exec_op() has been implemented we can get rid of the legacy
interface implementation.
Signed-off-by: NBoris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200501143917.1388957-6-boris.brezillon@collabora.com
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drivers/mtd/nand/raw/diskonchip.c
浏览文件 @ d8ef2b73
......@@ -86,10 +86,6 @@ static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
#define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
#define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
static void doc200x_hwcontrol(struct nand_chip *this, int cmd,
unsigned int bitmask);
static void doc200x_select_chip(struct nand_chip *this, int chip);
static int debug = 0;
module_param(debug, int, 0);
......@@ -304,20 +300,6 @@ static void doc2000_write_byte(struct nand_chip *this, u_char datum)
WriteDOC(datum, docptr, 2k_CDSN_IO);
}
static u_char doc2000_read_byte(struct nand_chip *this)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
u_char ret;
ReadDOC(docptr, CDSNSlowIO);
DoC_Delay(doc, 2);
ret = ReadDOC(docptr, 2k_CDSN_IO);
if (debug)
printk("read_byte returns %02x\n", ret);
return ret;
}
static void doc2000_writebuf(struct nand_chip *this, const u_char *buf,
int len)
{
......@@ -430,20 +412,6 @@ static void __init doc2000_count_chips(struct mtd_info *mtd)
pr_debug("Detected %d chips per floor.\n", i);
}
static int doc200x_wait(struct nand_chip *this)
{
struct doc_priv *doc = nand_get_controller_data(this);
int status;
DoC_WaitReady(doc);
nand_status_op(this, NULL);
DoC_WaitReady(doc);
status = (int)this->legacy.read_byte(this);
return status;
}
static void doc2001_write_byte(struct nand_chip *this, u_char datum)
{
struct doc_priv *doc = nand_get_controller_data(this);
......@@ -454,19 +422,6 @@ static void doc2001_write_byte(struct nand_chip *this, u_char datum)
WriteDOC(datum, docptr, WritePipeTerm);
}
static u_char doc2001_read_byte(struct nand_chip *this)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
//ReadDOC(docptr, CDSNSlowIO);
/* 11.4.5 -- delay twice to allow extended length cycle */
DoC_Delay(doc, 2);
ReadDOC(docptr, ReadPipeInit);
//return ReadDOC(docptr, Mil_CDSN_IO);
return ReadDOC(docptr, LastDataRead);
}
static void doc2001_writebuf(struct nand_chip *this, const u_char *buf, int len)
{
struct doc_priv *doc = nand_get_controller_data(this);
......@@ -495,20 +450,6 @@ static void doc2001_readbuf(struct nand_chip *this, u_char *buf, int len)
buf[i] = ReadDOC(docptr, LastDataRead);
}
static u_char doc2001plus_read_byte(struct nand_chip *this)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
u_char ret;
ReadDOC(docptr, Mplus_ReadPipeInit);
ReadDOC(docptr, Mplus_ReadPipeInit);
ret = ReadDOC(docptr, Mplus_LastDataRead);
if (debug)
printk("read_byte returns %02x\n", ret);
return ret;
}
static void doc2001plus_writebuf(struct nand_chip *this, const u_char *buf, int len)
{
struct doc_priv *doc = nand_get_controller_data(this);
......@@ -559,84 +500,6 @@ static void doc2001plus_readbuf(struct nand_chip *this, u_char *buf, int len)
printk("\n");
}
static void doc2001plus_select_chip(struct nand_chip *this, int chip)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
int floor = 0;
if (debug)
printk("select chip (%d)\n", chip);
if (chip == -1) {
/* Disable flash internally */
WriteDOC(0, docptr, Mplus_FlashSelect);
return;
}
floor = chip / doc->chips_per_floor;
chip -= (floor * doc->chips_per_floor);
/* Assert ChipEnable and deassert WriteProtect */
WriteDOC((DOC_FLASH_CE), docptr, Mplus_FlashSelect);
nand_reset_op(this);
doc->curchip = chip;
doc->curfloor = floor;
}
static void doc200x_select_chip(struct nand_chip *this, int chip)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
int floor = 0;
if (debug)
printk("select chip (%d)\n", chip);
if (chip == -1)
return;
floor = chip / doc->chips_per_floor;
chip -= (floor * doc->chips_per_floor);
/* 11.4.4 -- deassert CE before changing chip */
doc200x_hwcontrol(this, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
WriteDOC(floor, docptr, FloorSelect);
WriteDOC(chip, docptr, CDSNDeviceSelect);
doc200x_hwcontrol(this, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
doc->curchip = chip;
doc->curfloor = floor;
}
#define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE)
static void doc200x_hwcontrol(struct nand_chip *this, int cmd,
unsigned int ctrl)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
if (ctrl & NAND_CTRL_CHANGE) {
doc->CDSNControl &= ~CDSN_CTRL_MSK;
doc->CDSNControl |= ctrl & CDSN_CTRL_MSK;
if (debug)
printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
WriteDOC(doc->CDSNControl, docptr, CDSNControl);
/* 11.4.3 -- 4 NOPs after CSDNControl write */
DoC_Delay(doc, 4);
}
if (cmd != NAND_CMD_NONE) {
if (DoC_is_2000(doc))
doc2000_write_byte(this, cmd);
else
doc2001_write_byte(this, cmd);
}
}
static void doc200x_write_control(struct doc_priv *doc, u8 value)
{
WriteDOC(value, doc->virtadr, CDSNControl);
......@@ -797,144 +660,6 @@ static int doc2001plus_exec_op(struct nand_chip *this,
return 0;
}
static void doc2001plus_command(struct nand_chip *this, unsigned command,
int column, int page_addr)
{
struct mtd_info *mtd = nand_to_mtd(this);
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
/*
* Must terminate write pipeline before sending any commands
* to the device.
*/
if (command == NAND_CMD_PAGEPROG) {
WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
WriteDOC(0x00, docptr, Mplus_WritePipeTerm);
}
/*
* Write out the command to the device.
*/
if (command == NAND_CMD_SEQIN) {
int readcmd;
if (column >= mtd->writesize) {
/* OOB area */
column -= mtd->writesize;
readcmd = NAND_CMD_READOOB;
} else if (column < 256) {
/* First 256 bytes --> READ0 */
readcmd = NAND_CMD_READ0;
} else {
column -= 256;
readcmd = NAND_CMD_READ1;
}
WriteDOC(readcmd, docptr, Mplus_FlashCmd);
}
WriteDOC(command, docptr, Mplus_FlashCmd);
WriteDOC(0, docptr, Mplus_WritePipeTerm);
WriteDOC(0, docptr, Mplus_WritePipeTerm);
if (column != -1 || page_addr != -1) {
/* Serially input address */
if (column != -1) {
/* Adjust columns for 16 bit buswidth */
if (this->options & NAND_BUSWIDTH_16 &&
!nand_opcode_8bits(command))
column >>= 1;
WriteDOC(column, docptr, Mplus_FlashAddress);
}
if (page_addr != -1) {
WriteDOC((unsigned char)(page_addr & 0xff), docptr, Mplus_FlashAddress);
WriteDOC((unsigned char)((page_addr >> 8) & 0xff), docptr, Mplus_FlashAddress);
if (this->options & NAND_ROW_ADDR_3) {
WriteDOC((unsigned char)((page_addr >> 16) & 0x0f), docptr, Mplus_FlashAddress);
printk("high density\n");
}
}
WriteDOC(0, docptr, Mplus_WritePipeTerm);
WriteDOC(0, docptr, Mplus_WritePipeTerm);
/* deassert ALE */
if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 ||
command == NAND_CMD_READOOB || command == NAND_CMD_READID)
WriteDOC(0, docptr, Mplus_FlashControl);
}
/*
* program and erase have their own busy handlers
* status and sequential in needs no delay
*/
switch (command) {
case NAND_CMD_PAGEPROG:
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
case NAND_CMD_SEQIN:
case NAND_CMD_STATUS:
return;
case NAND_CMD_RESET:
if (this->legacy.dev_ready)
break;
udelay(this->legacy.chip_delay);
WriteDOC(NAND_CMD_STATUS, docptr, Mplus_FlashCmd);
WriteDOC(0, docptr, Mplus_WritePipeTerm);
WriteDOC(0, docptr, Mplus_WritePipeTerm);
while (!(this->legacy.read_byte(this) & 0x40)) ;
return;
/* This applies to read commands */
default:
/*
* If we don't have access to the busy pin, we apply the given
* command delay
*/
if (!this->legacy.dev_ready) {
udelay(this->legacy.chip_delay);
return;
}
}
/* Apply this short delay always to ensure that we do wait tWB in
* any case on any machine. */
ndelay(100);
/* wait until command is processed */
while (!this->legacy.dev_ready(this)) ;
}
static int doc200x_dev_ready(struct nand_chip *this)
{
struct doc_priv *doc = nand_get_controller_data(this);
void __iomem *docptr = doc->virtadr;
if (DoC_is_MillenniumPlus(doc)) {
/* 11.4.2 -- must NOP four times before checking FR/B# */
DoC_Delay(doc, 4);
if ((ReadDOC(docptr, Mplus_FlashControl) & CDSN_CTRL_FR_B_MASK) != CDSN_CTRL_FR_B_MASK) {
if (debug)
printk("not ready\n");
return 0;
}
if (debug)
printk("was ready\n");
return 1;
} else {
/* 11.4.2 -- must NOP four times before checking FR/B# */
DoC_Delay(doc, 4);
if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) {
if (debug)
printk("not ready\n");
return 0;
}
/* 11.4.2 -- Must NOP twice if it's ready */
DoC_Delay(doc, 2);
if (debug)
printk("was ready\n");
return 1;
}
}
static void doc200x_enable_hwecc(struct nand_chip *this, int mode)
{
struct doc_priv *doc = nand_get_controller_data(this);
......@@ -1496,9 +1221,6 @@ static inline int __init doc2000_init(struct mtd_info *mtd)
struct nand_chip *this = mtd_to_nand(mtd);
struct doc_priv *doc = nand_get_controller_data(this);
this->legacy.read_byte = doc2000_read_byte;
this->legacy.write_buf = doc2000_writebuf;
this->legacy.read_buf = doc2000_readbuf;
doc->late_init = nftl_scan_bbt;
doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
......@@ -1512,10 +1234,6 @@ static inline int __init doc2001_init(struct mtd_info *mtd)
struct nand_chip *this = mtd_to_nand(mtd);
struct doc_priv *doc = nand_get_controller_data(this);
this->legacy.read_byte = doc2001_read_byte;
this->legacy.write_buf = doc2001_writebuf;
this->legacy.read_buf = doc2001_readbuf;
ReadDOC(doc->virtadr, ChipID);
ReadDOC(doc->virtadr, ChipID);
ReadDOC(doc->virtadr, ChipID);
......@@ -1542,13 +1260,7 @@ static inline int __init doc2001plus_init(struct mtd_info *mtd)
struct nand_chip *this = mtd_to_nand(mtd);
struct doc_priv *doc = nand_get_controller_data(this);
this->legacy.read_byte = doc2001plus_read_byte;
this->legacy.write_buf = doc2001plus_writebuf;
this->legacy.read_buf = doc2001plus_readbuf;
doc->late_init = inftl_scan_bbt;
this->legacy.cmd_ctrl = NULL;
this->legacy.select_chip = doc2001plus_select_chip;
this->legacy.cmdfunc = doc2001plus_command;
this->ecc.hwctl = doc2001plus_enable_hwecc;
doc->chips_per_floor = 1;
......@@ -1740,10 +1452,6 @@ static int __init doc_probe(unsigned long physadr)
nand->controller = &doc->base;
nand_set_controller_data(nand, doc);
nand->legacy.select_chip = doc200x_select_chip;
nand->legacy.cmd_ctrl = doc200x_hwcontrol;
nand->legacy.dev_ready = doc200x_dev_ready;
nand->legacy.waitfunc = doc200x_wait;
nand->ecc.hwctl = doc200x_enable_hwecc;
nand->ecc.calculate = doc200x_calculate_ecc;
nand->ecc.correct = doc200x_correct_data;
......
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