+++ /dev/null
-From a5fc495c8dc199ffa997d43331693a5b7ee07270 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 17 Nov 2013 17:41:46 +0100
-Subject: [PATCH] ralink: add mt7620 nand driver
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- drivers/mtd/maps/Kconfig | 4 +
- drivers/mtd/maps/Makefile | 2 +
- drivers/mtd/maps/ralink_nand.c | 2136 ++++++++++++++++++++++++++++++++++++++++
- drivers/mtd/maps/ralink_nand.h | 232 +++++
- drivers/mtd/nand/Makefile | 2 +-
- 5 files changed, 2375 insertions(+), 1 deletion(-)
- create mode 100644 drivers/mtd/maps/ralink_nand.c
- create mode 100644 drivers/mtd/maps/ralink_nand.h
-
---- a/drivers/mtd/maps/Kconfig
-+++ b/drivers/mtd/maps/Kconfig
-@@ -424,4 +424,8 @@ config MTD_LATCH_ADDR
-
- If compiled as a module, it will be called latch-addr-flash.
-
-+config MTD_NAND_MT7620
-+ tristate "Support for NAND on Mediatek MT7620"
-+ depends on RALINK && SOC_MT7620
-+
- endmenu
---- a/drivers/mtd/maps/Makefile
-+++ b/drivers/mtd/maps/Makefile
-@@ -46,3 +46,5 @@ obj-$(CONFIG_MTD_VMU) += vmu-flash.o
- obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
- obj-$(CONFIG_MTD_LATCH_ADDR) += latch-addr-flash.o
- obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o
-+obj-$(CONFIG_MTD_NAND_MT7620) += ralink_nand.o
-+
---- /dev/null
-+++ b/drivers/mtd/maps/ralink_nand.c
-@@ -0,0 +1,2136 @@
-+#define DEBUG
-+#include <linux/device.h>
-+#undef DEBUG
-+#include <linux/slab.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/delay.h>
-+#include <linux/module.h>
-+#include <linux/interrupt.h>
-+#include <linux/dma-mapping.h>
-+#include <linux/mtd/partitions.h>
-+#include <asm/io.h>
-+#include <linux/delay.h>
-+#include <linux/sched.h>
-+#include <linux/of.h>
-+#include <linux/platform_device.h>
-+
-+#include "ralink_nand.h"
-+#ifdef RANDOM_GEN_BAD_BLOCK
-+#include <linux/random.h>
-+#endif
-+
-+#define LARGE_MTD_BOOT_PART_SIZE (CFG_BLOCKSIZE<<2)
-+#define LARGE_MTD_CONFIG_PART_SIZE (CFG_BLOCKSIZE<<2)
-+#define LARGE_MTD_FACTORY_PART_SIZE (CFG_BLOCKSIZE<<1)
-+
-+
-+#define BLOCK_ALIGNED(a) ((a) & (CFG_BLOCKSIZE - 1))
-+
-+#define READ_STATUS_RETRY 1000
-+
-+struct mtd_info *ranfc_mtd = NULL;
-+
-+int skipbbt = 0;
-+int ranfc_debug = 1;
-+static int ranfc_bbt = 1;
-+#if defined (WORKAROUND_RX_BUF_OV)
-+static int ranfc_verify = 1;
-+#endif
-+static u32 nand_addrlen;
-+
-+#if 0
-+module_param(ranfc_debug, int, 0644);
-+module_param(ranfc_bbt, int, 0644);
-+module_param(ranfc_verify, int, 0644);
-+#endif
-+
-+#if 0
-+#define ra_dbg(args...) do { if (ranfc_debug) printk(args); } while(0)
-+#else
-+#define ra_dbg(args...)
-+#endif
-+
-+#define CLEAR_INT_STATUS() ra_outl(NFC_INT_ST, ra_inl(NFC_INT_ST))
-+#define NFC_TRANS_DONE() (ra_inl(NFC_INT_ST) & INT_ST_ND_DONE)
-+
-+int is_nand_page_2048 = 0;
-+const unsigned int nand_size_map[2][3] = {{25, 30, 30}, {20, 27, 30}};
-+
-+static int nfc_wait_ready(int snooze_ms);
-+
-+static const char * const mtk_probe_types[] = { "cmdlinepart", "ofpart", NULL };
-+
-+/**
-+ * reset nand chip
-+ */
-+static int nfc_chip_reset(void)
-+{
-+ int status;
-+
-+ //ra_dbg("%s:\n", __func__);
-+
-+ // reset nand flash
-+ ra_outl(NFC_CMD1, 0x0);
-+ ra_outl(NFC_CMD2, 0xff);
-+ ra_outl(NFC_ADDR, 0x0);
-+ ra_outl(NFC_CONF, 0x0411);
-+
-+ status = nfc_wait_ready(5); //erase wait 5us
-+ if (status & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ }
-+
-+ return (int)(status & NAND_STATUS_FAIL);
-+
-+}
-+
-+
-+
-+/**
-+ * clear NFC and flash chip.
-+ */
-+static int nfc_all_reset(void)
-+{
-+ int retry;
-+
-+ ra_dbg("%s: \n", __func__);
-+
-+ // reset controller
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) | 0x02); //clear data buffer
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) & ~0x02); //clear data buffer
-+
-+ CLEAR_INT_STATUS();
-+
-+ retry = READ_STATUS_RETRY;
-+ while ((ra_inl(NFC_INT_ST) & 0x02) != 0x02 && retry--);
-+ if (retry <= 0) {
-+ printk("nfc_all_reset: clean buffer fail \n");
-+ return -1;
-+ }
-+
-+ retry = READ_STATUS_RETRY;
-+ while ((ra_inl(NFC_STATUS) & 0x1) != 0x0 && retry--) { //fixme, controller is busy ?
-+ udelay(1);
-+ }
-+
-+ nfc_chip_reset();
-+
-+ return 0;
-+}
-+
-+/** NOTICE: only called by nfc_wait_ready().
-+ * @return -1, nfc can not get transction done
-+ * @return 0, ok.
-+ */
-+static int _nfc_read_status(char *status)
-+{
-+ unsigned long cmd1, conf;
-+ int int_st, nfc_st;
-+ int retry;
-+
-+ cmd1 = 0x70;
-+ conf = 0x000101 | (1 << 20);
-+
-+ //fixme, should we check nfc status?
-+ CLEAR_INT_STATUS();
-+
-+ ra_outl(NFC_CMD1, cmd1);
-+ ra_outl(NFC_CONF, conf);
-+
-+ /* FIXME,
-+ * 1. since we have no wired ready signal, directly
-+ * calling this function is not gurantee to read right status under ready state.
-+ * 2. the other side, we can not determine how long to become ready, this timeout retry is nonsense.
-+ * 3. SUGGESTION: call nfc_read_status() from nfc_wait_ready(),
-+ * that is aware about caller (in sementics) and has snooze plused nfc ND_DONE.
-+ */
-+ retry = READ_STATUS_RETRY;
-+ do {
-+ nfc_st = ra_inl(NFC_STATUS);
-+ int_st = ra_inl(NFC_INT_ST);
-+
-+ ndelay(10);
-+ } while (!(int_st & INT_ST_RX_BUF_RDY) && retry--);
-+
-+ if (!(int_st & INT_ST_RX_BUF_RDY)) {
-+ printk("nfc_read_status: NFC fail, int_st(%x), retry:%x. nfc:%x, reset nfc and flash. \n",
-+ int_st, retry, nfc_st);
-+ nfc_all_reset();
-+ *status = NAND_STATUS_FAIL;
-+ return -1;
-+ }
-+
-+ *status = (char)(le32_to_cpu(ra_inl(NFC_DATA)) & 0x0ff);
-+ return 0;
-+}
-+
-+/**
-+ * @return !0, chip protect.
-+ * @return 0, chip not protected.
-+ */
-+static int nfc_check_wp(void)
-+{
-+ /* Check the WP bit */
-+#if !defined CONFIG_NOT_SUPPORT_WP
-+ return !!(ra_inl(NFC_CTRL) & 0x01);
-+#else
-+ char result = 0;
-+ int ret;
-+
-+ ret = _nfc_read_status(&result);
-+ //FIXME, if ret < 0
-+
-+ return !(result & NAND_STATUS_WP);
-+#endif
-+}
-+
-+#if !defined CONFIG_NOT_SUPPORT_RB
-+/*
-+ * @return !0, chip ready.
-+ * @return 0, chip busy.
-+ */
-+static int nfc_device_ready(void)
-+{
-+ /* Check the ready */
-+ return !!(ra_inl(NFC_STATUS) & 0x04);
-+}
-+#endif
-+
-+
-+/**
-+ * generic function to get data from flash.
-+ * @return data length reading from flash.
-+ */
-+static int _ra_nand_pull_data(char *buf, int len, int use_gdma)
-+{
-+#ifdef RW_DATA_BY_BYTE
-+ char *p = buf;
-+#else
-+ __u32 *p = (__u32 *)buf;
-+#endif
-+ int retry, int_st;
-+ unsigned int ret_data;
-+ int ret_size;
-+
-+ // receive data by use_gdma
-+ if (use_gdma) {
-+ //if (_ra_nand_dma_pull((unsigned long)p, len)) {
-+ if (1) {
-+ printk("%s: fail \n", __func__);
-+ len = -1; //return error
-+ }
-+
-+ return len;
-+ }
-+
-+ //fixme: retry count size?
-+ retry = READ_STATUS_RETRY;
-+ // no gdma
-+ while (len > 0) {
-+ int_st = ra_inl(NFC_INT_ST);
-+ if (int_st & INT_ST_RX_BUF_RDY) {
-+
-+ ret_data = ra_inl(NFC_DATA);
-+ ra_outl(NFC_INT_ST, INT_ST_RX_BUF_RDY);
-+#ifdef RW_DATA_BY_BYTE
-+ ret_size = sizeof(unsigned int);
-+ ret_size = min(ret_size, len);
-+ len -= ret_size;
-+ while (ret_size-- > 0) {
-+ //nfc is little endian
-+ *p++ = ret_data & 0x0ff;
-+ ret_data >>= 8;
-+ }
-+#else
-+ ret_size = min(len, 4);
-+ len -= ret_size;
-+ if (ret_size == 4)
-+ *p++ = ret_data;
-+ else {
-+ __u8 *q = (__u8 *)p;
-+ while (ret_size-- > 0) {
-+ *q++ = ret_data & 0x0ff;
-+ ret_data >>= 8;
-+ }
-+ p = (__u32 *)q;
-+ }
-+#endif
-+ retry = READ_STATUS_RETRY;
-+ }
-+ else if (int_st & INT_ST_ND_DONE) {
-+ break;
-+ }
-+ else {
-+ udelay(1);
-+ if (retry-- < 0)
-+ break;
-+ }
-+ }
-+
-+#ifdef RW_DATA_BY_BYTE
-+ return (int)(p - buf);
-+#else
-+ return ((int)p - (int)buf);
-+#endif
-+}
-+
-+/**
-+ * generic function to put data into flash.
-+ * @return data length writing into flash.
-+ */
-+static int _ra_nand_push_data(char *buf, int len, int use_gdma)
-+{
-+#ifdef RW_DATA_BY_BYTE
-+ char *p = buf;
-+#else
-+ __u32 *p = (__u32 *)buf;
-+#endif
-+ int retry, int_st;
-+ unsigned int tx_data = 0;
-+ int tx_size, iter = 0;
-+
-+ // receive data by use_gdma
-+ if (use_gdma) {
-+ //if (_ra_nand_dma_push((unsigned long)p, len))
-+ if (1)
-+ len = 0;
-+ printk("%s: fail \n", __func__);
-+ return len;
-+ }
-+
-+ // no gdma
-+ retry = READ_STATUS_RETRY;
-+ while (len > 0) {
-+ int_st = ra_inl(NFC_INT_ST);
-+ if (int_st & INT_ST_TX_BUF_RDY) {
-+#ifdef RW_DATA_BY_BYTE
-+ tx_size = min(len, (int)sizeof(unsigned long));
-+ for (iter = 0; iter < tx_size; iter++) {
-+ tx_data |= (*p++ << (8*iter));
-+ }
-+#else
-+ tx_size = min(len, 4);
-+ if (tx_size == 4)
-+ tx_data = (*p++);
-+ else {
-+ __u8 *q = (__u8 *)p;
-+ for (iter = 0; iter < tx_size; iter++)
-+ tx_data |= (*q++ << (8*iter));
-+ p = (__u32 *)q;
-+ }
-+#endif
-+ ra_outl(NFC_INT_ST, INT_ST_TX_BUF_RDY);
-+ ra_outl(NFC_DATA, tx_data);
-+ len -= tx_size;
-+ retry = READ_STATUS_RETRY;
-+ }
-+ else if (int_st & INT_ST_ND_DONE) {
-+ break;
-+ }
-+ else {
-+ udelay(1);
-+ if (retry-- < 0) {
-+ ra_dbg("%s p:%p buf:%p \n", __func__, p, buf);
-+ break;
-+ }
-+ }
-+ }
-+
-+
-+#ifdef RW_DATA_BY_BYTE
-+ return (int)(p - buf);
-+#else
-+ return ((int)p - (int)buf);
-+#endif
-+
-+}
-+
-+static int nfc_select_chip(struct ra_nand_chip *ra, int chipnr)
-+{
-+#if (CONFIG_NUMCHIPS == 1)
-+ if (!(chipnr < CONFIG_NUMCHIPS))
-+ return -1;
-+ return 0;
-+#else
-+ BUG();
-+#endif
-+}
-+
-+/** @return -1: chip_select fail
-+ * 0 : both CE and WP==0 are OK
-+ * 1 : CE OK and WP==1
-+ */
-+static int nfc_enable_chip(struct ra_nand_chip *ra, unsigned int offs, int read_only)
-+{
-+ int chipnr = offs >> ra->chip_shift;
-+
-+ ra_dbg("%s: offs:%x read_only:%x \n", __func__, offs, read_only);
-+
-+ chipnr = nfc_select_chip(ra, chipnr);
-+ if (chipnr < 0) {
-+ printk("%s: chip select error, offs(%x)\n", __func__, offs);
-+ return -1;
-+ }
-+
-+ if (!read_only)
-+ return nfc_check_wp();
-+
-+ return 0;
-+}
-+
-+/** wait nand chip becomeing ready and return queried status.
-+ * @param snooze: sleep time in ms unit before polling device ready.
-+ * @return status of nand chip
-+ * @return NAN_STATUS_FAIL if something unexpected.
-+ */
-+static int nfc_wait_ready(int snooze_ms)
-+{
-+ int retry;
-+ char status;
-+
-+ // wait nfc idle,
-+ if (snooze_ms == 0)
-+ snooze_ms = 1;
-+ else
-+ schedule_timeout(snooze_ms * HZ / 1000);
-+
-+ snooze_ms = retry = snooze_ms *1000000 / 100 ; // ndelay(100)
-+
-+ while (!NFC_TRANS_DONE() && retry--) {
-+ if (!cond_resched())
-+ ndelay(100);
-+ }
-+
-+ if (!NFC_TRANS_DONE()) {
-+ printk("nfc_wait_ready: no transaction done \n");
-+ return NAND_STATUS_FAIL;
-+ }
-+
-+#if !defined (CONFIG_NOT_SUPPORT_RB)
-+ //fixme
-+ while(!(status = nfc_device_ready()) && retry--) {
-+ ndelay(100);
-+ }
-+
-+ if (status == 0) {
-+ printk("nfc_wait_ready: no device ready. \n");
-+ return NAND_STATUS_FAIL;
-+ }
-+
-+ _nfc_read_status(&status);
-+ return status;
-+#else
-+
-+ while(retry--) {
-+ _nfc_read_status(&status);
-+ if (status & NAND_STATUS_READY)
-+ break;
-+ ndelay(100);
-+ }
-+ if (retry<0)
-+ printk("nfc_wait_ready 2: no device ready, status(%x). \n", status);
-+
-+ return status;
-+#endif
-+}
-+
-+/**
-+ * return 0: erase OK
-+ * return -EIO: fail
-+ */
-+int nfc_erase_block(struct ra_nand_chip *ra, int row_addr)
-+{
-+ unsigned long cmd1, cmd2, bus_addr, conf;
-+ char status;
-+
-+ cmd1 = 0x60;
-+ cmd2 = 0xd0;
-+ bus_addr = row_addr;
-+ conf = 0x00511 | ((CFG_ROW_ADDR_CYCLE)<<16);
-+
-+ // set NFC
-+ ra_dbg("%s: cmd1: %lx, cmd2:%lx bus_addr: %lx, conf: %lx \n",
-+ __func__, cmd1, cmd2, bus_addr, conf);
-+
-+ //fixme, should we check nfc status?
-+ CLEAR_INT_STATUS();
-+
-+ ra_outl(NFC_CMD1, cmd1);
-+ ra_outl(NFC_CMD2, cmd2);
-+ ra_outl(NFC_ADDR, bus_addr);
-+ ra_outl(NFC_CONF, conf);
-+
-+ status = nfc_wait_ready(3); //erase wait 3ms
-+ if (status & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ return -EIO;
-+ }
-+
-+ return 0;
-+
-+}
-+
-+static inline int _nfc_read_raw_data(int cmd1, int cmd2, int bus_addr, int bus_addr2, int conf, char *buf, int len, int flags)
-+{
-+ int ret;
-+
-+ CLEAR_INT_STATUS();
-+ ra_outl(NFC_CMD1, cmd1);
-+ ra_outl(NFC_CMD2, cmd2);
-+ ra_outl(NFC_ADDR, bus_addr);
-+#if defined (CONFIG_RALINK_RT6855) || defined (CONFIG_RALINK_RT6855A) || \
-+ defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7621)
-+ ra_outl(NFC_ADDR2, bus_addr2);
-+#endif
-+ ra_outl(NFC_CONF, conf);
-+
-+ ret = _ra_nand_pull_data(buf, len, 0);
-+ if (ret != len) {
-+ ra_dbg("%s: ret:%x (%x) \n", __func__, ret, len);
-+ return NAND_STATUS_FAIL;
-+ }
-+
-+ //FIXME, this section is not necessary
-+ ret = nfc_wait_ready(0); //wait ready
-+ /* to prevent the DATA FIFO 's old data from next operation */
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) | 0x02); //clear data buffer
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) & ~0x02); //clear data buffer
-+
-+ if (ret & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ return NAND_STATUS_FAIL;
-+ }
-+
-+ return 0;
-+}
-+
-+static inline int _nfc_write_raw_data(int cmd1, int cmd3, int bus_addr, int bus_addr2, int conf, char *buf, int len, int flags)
-+{
-+ int ret;
-+
-+ CLEAR_INT_STATUS();
-+ ra_outl(NFC_CMD1, cmd1);
-+ ra_outl(NFC_CMD3, cmd3);
-+ ra_outl(NFC_ADDR, bus_addr);
-+#if defined (CONFIG_RALINK_RT6855) || defined (CONFIG_RALINK_RT6855A) || \
-+ defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7621)
-+ ra_outl(NFC_ADDR2, bus_addr2);
-+#endif
-+ ra_outl(NFC_CONF, conf);
-+
-+ ret = _ra_nand_push_data(buf, len, 0);
-+ if (ret != len) {
-+ ra_dbg("%s: ret:%x (%x) \n", __func__, ret, len);
-+ return NAND_STATUS_FAIL;
-+ }
-+
-+ ret = nfc_wait_ready(1); //write wait 1ms
-+ /* to prevent the DATA FIFO 's old data from next operation */
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) | 0x02); //clear data buffer
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) & ~0x02); //clear data buffer
-+
-+ if (ret & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ return NAND_STATUS_FAIL;
-+ }
-+
-+ return 0;
-+}
-+
-+/**
-+ * @return !0: fail
-+ * @return 0: OK
-+ */
-+int nfc_read_oob(struct ra_nand_chip *ra, int page, unsigned int offs, char *buf, int len, int flags)
-+{
-+ unsigned int cmd1 = 0, cmd2 = 0, conf = 0;
-+ unsigned int bus_addr = 0, bus_addr2 = 0;
-+ unsigned int ecc_en;
-+ int use_gdma;
-+ int status;
-+
-+ int pages_perblock = 1<<(ra->erase_shift - ra->page_shift);
-+ // constrain of nfc read function
-+
-+#if defined (WORKAROUND_RX_BUF_OV)
-+ BUG_ON (len > 60); //problem of rx-buffer overrun
-+#endif
-+ BUG_ON (offs >> ra->oob_shift); //page boundry
-+ BUG_ON ((unsigned int)(((offs + len) >> ra->oob_shift) + page) >
-+ ((page + pages_perblock) & ~(pages_perblock-1))); //block boundry
-+
-+ use_gdma = flags & FLAG_USE_GDMA;
-+ ecc_en = flags & FLAG_ECC_EN;
-+ bus_addr = (page << (CFG_COLUMN_ADDR_CYCLE*8)) | (offs & ((1<<CFG_COLUMN_ADDR_CYCLE*8) - 1));
-+
-+ if (is_nand_page_2048) {
-+ bus_addr += CFG_PAGESIZE;
-+ bus_addr2 = page >> (CFG_COLUMN_ADDR_CYCLE*8);
-+ cmd1 = 0x0;
-+ cmd2 = 0x30;
-+ conf = 0x000511| ((CFG_ADDR_CYCLE)<<16) | (len << 20);
-+ }
-+ else {
-+ cmd1 = 0x50;
-+ conf = 0x000141| ((CFG_ADDR_CYCLE)<<16) | (len << 20);
-+ }
-+ if (ecc_en)
-+ conf |= (1<<3);
-+ if (use_gdma)
-+ conf |= (1<<2);
-+
-+ ra_dbg("%s: cmd1:%x, bus_addr:%x, conf:%x, len:%x, flag:%x\n",
-+ __func__, cmd1, bus_addr, conf, len, flags);
-+
-+ status = _nfc_read_raw_data(cmd1, cmd2, bus_addr, bus_addr2, conf, buf, len, flags);
-+ if (status & NAND_STATUS_FAIL) {
-+ printk("%s: fail\n", __func__);
-+ return -EIO;
-+ }
-+
-+ return 0;
-+}
-+
-+/**
-+ * @return !0: fail
-+ * @return 0: OK
-+ */
-+int nfc_write_oob(struct ra_nand_chip *ra, int page, unsigned int offs, char *buf, int len, int flags)
-+{
-+ unsigned int cmd1 = 0, cmd3=0, conf = 0;
-+ unsigned int bus_addr = 0, bus_addr2 = 0;
-+ int use_gdma;
-+ int status;
-+
-+ int pages_perblock = 1<<(ra->erase_shift - ra->page_shift);
-+ // constrain of nfc read function
-+
-+ BUG_ON (offs >> ra->oob_shift); //page boundry
-+ BUG_ON ((unsigned int)(((offs + len) >> ra->oob_shift) + page) >
-+ ((page + pages_perblock) & ~(pages_perblock-1))); //block boundry
-+
-+ use_gdma = flags & FLAG_USE_GDMA;
-+ bus_addr = (page << (CFG_COLUMN_ADDR_CYCLE*8)) | (offs & ((1<<CFG_COLUMN_ADDR_CYCLE*8) - 1));
-+
-+ if (is_nand_page_2048) {
-+ cmd1 = 0x80;
-+ cmd3 = 0x10;
-+ bus_addr += CFG_PAGESIZE;
-+ bus_addr2 = page >> (CFG_COLUMN_ADDR_CYCLE*8);
-+ conf = 0x001123 | ((CFG_ADDR_CYCLE)<<16) | ((len) << 20);
-+ }
-+ else {
-+ cmd1 = 0x08050;
-+ cmd3 = 0x10;
-+ conf = 0x001223 | ((CFG_ADDR_CYCLE)<<16) | ((len) << 20);
-+ }
-+ if (use_gdma)
-+ conf |= (1<<2);
-+
-+ // set NFC
-+ ra_dbg("%s: cmd1: %x, cmd3: %x bus_addr: %x, conf: %x, len:%x\n",
-+ __func__, cmd1, cmd3, bus_addr, conf, len);
-+
-+ status = _nfc_write_raw_data(cmd1, cmd3, bus_addr, bus_addr2, conf, buf, len, flags);
-+ if (status & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ return -EIO;
-+ }
-+
-+ return 0;
-+}
-+
-+
-+int nfc_read_page(struct ra_nand_chip *ra, char *buf, int page, int flags);
-+int nfc_write_page(struct ra_nand_chip *ra, char *buf, int page, int flags);
-+
-+
-+#if !defined (WORKAROUND_RX_BUF_OV)
-+static int one_bit_correction(char *ecc, char *expected, int *bytes, int *bits);
-+int nfc_ecc_verify(struct ra_nand_chip *ra, char *buf, int page, int mode)
-+{
-+ int ret, i;
-+ char *p, *e;
-+ int ecc;
-+
-+ //ra_dbg("%s, page:%x mode:%d\n", __func__, page, mode);
-+
-+ if (mode == FL_WRITING) {
-+ int len = CFG_PAGESIZE + CFG_PAGE_OOBSIZE;
-+ int conf = 0x000141| ((CFG_ADDR_CYCLE)<<16) | (len << 20);
-+ conf |= (1<<3); //(ecc_en)
-+ //conf |= (1<<2); // (use_gdma)
-+
-+ p = ra->readback_buffers;
-+ ret = nfc_read_page(ra, ra->readback_buffers, page, FLAG_ECC_EN);
-+ if (ret == 0)
-+ goto ecc_check;
-+
-+ //FIXME, double comfirm
-+ printk("%s: read back fail, try again \n",__func__);
-+ ret = nfc_read_page(ra, ra->readback_buffers, page, FLAG_ECC_EN);
-+ if (ret != 0) {
-+ printk("\t%s: read back fail agian \n",__func__);
-+ goto bad_block;
-+ }
-+ }
-+ else if (mode == FL_READING) {
-+ p = buf;
-+ }
-+ else
-+ return -2;
-+
-+ecc_check:
-+ p += CFG_PAGESIZE;
-+ if (!is_nand_page_2048) {
-+ ecc = ra_inl(NFC_ECC);
-+ if (ecc == 0) //clean page.
-+ return 0;
-+ e = (char*)&ecc;
-+ for (i=0; i<CONFIG_ECC_BYTES; i++) {
-+ int eccpos = CONFIG_ECC_OFFSET + i;
-+ if (*(p + eccpos) != (char)0xff)
-+ break;
-+ if (i == CONFIG_ECC_BYTES - 1) {
-+ printk("skip ecc 0xff at page %x\n", page);
-+ return 0;
-+ }
-+ }
-+ for (i=0; i<CONFIG_ECC_BYTES; i++) {
-+ int eccpos = CONFIG_ECC_OFFSET + i;
-+ if (*(p + eccpos) != *(e + i)) {
-+ printk("%s mode:%s, invalid ecc, page: %x read:%x %x %x, ecc:%x \n",
-+ __func__, (mode == FL_READING)?"read":"write", page,
-+ *(p+ CONFIG_ECC_OFFSET), *(p+ CONFIG_ECC_OFFSET+1), *(p+ CONFIG_ECC_OFFSET +2), ecc);
-+ return -1;
-+ }
-+ }
-+ }
-+#if defined (CONFIG_RALINK_RT6855) || defined (CONFIG_RALINK_RT6855A) || \
-+ defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7621)
-+ else {
-+ int ecc2, ecc3, ecc4, qsz;
-+ char *e2, *e3, *e4;
-+ int correction_flag = 0;
-+ ecc = ra_inl(NFC_ECC_P1);
-+ ecc2 = ra_inl(NFC_ECC_P2);
-+ ecc3 = ra_inl(NFC_ECC_P3);
-+ ecc4 = ra_inl(NFC_ECC_P4);
-+ e = (char*)&ecc;
-+ e2 = (char*)&ecc2;
-+ e3 = (char*)&ecc3;
-+ e4 = (char*)&ecc4;
-+ qsz = CFG_PAGE_OOBSIZE / 4;
-+ if (ecc == 0 && ecc2 == 0 && ecc3 == 0 && ecc4 == 0)
-+ return 0;
-+ for (i=0; i<CONFIG_ECC_BYTES; i++) {
-+ int eccpos = CONFIG_ECC_OFFSET + i;
-+ if (*(p + eccpos) != (char)0xff)
-+ break;
-+ else if (*(p + eccpos + qsz) != (char)0xff)
-+ break;
-+ else if (*(p + eccpos + qsz*2) != (char)0xff)
-+ break;
-+ else if (*(p + eccpos + qsz*3) != (char)0xff)
-+ break;
-+ if (i == CONFIG_ECC_BYTES - 1) {
-+ printk("skip ecc 0xff at page %x\n", page);
-+ return 0;
-+ }
-+ }
-+ for (i=0; i<CONFIG_ECC_BYTES; i++) {
-+ int eccpos = CONFIG_ECC_OFFSET + i;
-+ if (*(p + eccpos) != *(e + i)) {
-+ printk("%s mode:%s, invalid ecc, page: %x read:%x %x %x, ecc:%x \n",
-+ __func__, (mode == FL_READING)?"read":"write", page,
-+ *(p+ CONFIG_ECC_OFFSET), *(p+ CONFIG_ECC_OFFSET+1), *(p+ CONFIG_ECC_OFFSET +2), ecc);
-+ correction_flag |= 0x1;
-+ }
-+ if (*(p + eccpos + qsz) != *(e2 + i)) {
-+ printk("%s mode:%s, invalid ecc2, page: %x read:%x %x %x, ecc2:%x \n",
-+ __func__, (mode == FL_READING)?"read":"write", page,
-+ *(p+CONFIG_ECC_OFFSET+qsz), *(p+ CONFIG_ECC_OFFSET+1+qsz), *(p+ CONFIG_ECC_OFFSET+2+qsz), ecc2);
-+ correction_flag |= 0x2;
-+ }
-+ if (*(p + eccpos + qsz*2) != *(e3 + i)) {
-+ printk("%s mode:%s, invalid ecc3, page: %x read:%x %x %x, ecc3:%x \n",
-+ __func__, (mode == FL_READING)?"read":"write", page,
-+ *(p+CONFIG_ECC_OFFSET+qsz*2), *(p+ CONFIG_ECC_OFFSET+1+qsz*2), *(p+ CONFIG_ECC_OFFSET+2+qsz*2), ecc3);
-+ correction_flag |= 0x4;
-+ }
-+ if (*(p + eccpos + qsz*3) != *(e4 + i)) {
-+ printk("%s mode:%s, invalid ecc4, page: %x read:%x %x %x, ecc4:%x \n",
-+ __func__, (mode == FL_READING)?"read":"write", page,
-+ *(p+CONFIG_ECC_OFFSET+qsz*3), *(p+ CONFIG_ECC_OFFSET+1+qsz*3), *(p+ CONFIG_ECC_OFFSET+2+qsz*3), ecc4);
-+ correction_flag |= 0x8;
-+ }
-+ }
-+
-+ if (correction_flag)
-+ {
-+ printk("trying to do correction!\n");
-+ if (correction_flag & 0x1)
-+ {
-+ int bytes, bits;
-+ char *pBuf = p - CFG_PAGESIZE;
-+
-+ if (one_bit_correction(p + CONFIG_ECC_OFFSET, e, &bytes, &bits) == 0)
-+ {
-+ pBuf[bytes] = pBuf[bytes] ^ (1 << bits);
-+ printk("1. correct byte %d, bit %d!\n", bytes, bits);
-+ }
-+ else
-+ {
-+ printk("failed to correct!\n");
-+ return -1;
-+ }
-+ }
-+
-+ if (correction_flag & 0x2)
-+ {
-+ int bytes, bits;
-+ char *pBuf = (p - CFG_PAGESIZE) + CFG_PAGESIZE/4;
-+
-+ if (one_bit_correction((p + CONFIG_ECC_OFFSET + qsz), e2, &bytes, &bits) == 0)
-+ {
-+ pBuf[bytes] = pBuf[bytes] ^ (1 << bits);
-+ printk("2. correct byte %d, bit %d!\n", bytes, bits);
-+ }
-+ else
-+ {
-+ printk("failed to correct!\n");
-+ return -1;
-+ }
-+ }
-+ if (correction_flag & 0x4)
-+ {
-+ int bytes, bits;
-+ char *pBuf = (p - CFG_PAGESIZE) + CFG_PAGESIZE/2;
-+
-+ if (one_bit_correction((p + CONFIG_ECC_OFFSET + qsz * 2), e3, &bytes, &bits) == 0)
-+ {
-+ pBuf[bytes] = pBuf[bytes] ^ (1 << bits);
-+ printk("3. correct byte %d, bit %d!\n", bytes, bits);
-+ }
-+ else
-+ {
-+ printk("failed to correct!\n");
-+ return -1;
-+ }
-+ }
-+ if (correction_flag & 0x8)
-+ {
-+ int bytes, bits;
-+ char *pBuf = (p - CFG_PAGESIZE) + CFG_PAGESIZE*3/4;
-+
-+ if (one_bit_correction((p + CONFIG_ECC_OFFSET + qsz * 3), e4, &bytes, &bits) == 0)
-+ {
-+ pBuf[bytes] = pBuf[bytes] ^ (1 << bits);
-+ printk("4. correct byte %d, bit %d!\n", bytes, bits);
-+ }
-+ else
-+ {
-+ printk("failed to correct!\n");
-+ return -1;
-+ }
-+ }
-+ }
-+
-+ }
-+#endif
-+ return 0;
-+
-+bad_block:
-+ return -1;
-+}
-+
-+#else
-+
-+void ranfc_dump(void)
-+{
-+ int i;
-+ for (i=0; i<11; i++) {
-+ if (i==6)
-+ continue;
-+ printk("%x: %x \n", NFC_BASE + i*4, ra_inl(NFC_BASE + i*4));
-+ }
-+}
-+
-+/**
-+ * @return 0, ecc OK or corrected.
-+ * @return NAND_STATUS_FAIL, ecc fail.
-+ */
-+
-+int nfc_ecc_verify(struct ra_nand_chip *ra, char *buf, int page, int mode)
-+{
-+ int ret, i;
-+ char *p, *e;
-+ int ecc;
-+
-+ if (ranfc_verify == 0)
-+ return 0;
-+
-+ ra_dbg("%s, page:%x mode:%d\n", __func__, page, mode);
-+
-+ if (mode == FL_WRITING) { // read back and memcmp
-+ ret = nfc_read_page(ra, ra->readback_buffers, page, FLAG_NONE);
-+ if (ret != 0) //double comfirm
-+ ret = nfc_read_page(ra, ra->readback_buffers, page, FLAG_NONE);
-+
-+ if (ret != 0) {
-+ printk("%s: mode:%x read back fail \n", __func__, mode);
-+ return -1;
-+ }
-+ return memcmp(buf, ra->readback_buffers, 1<<ra->page_shift);
-+ }
-+
-+ if (mode == FL_READING) {
-+#if 0
-+ if (ra->sandbox_page == 0)
-+ return 0;
-+
-+ ret = nfc_write_page(ra, buf, ra->sandbox_page, FLAG_USE_GDMA | FLAG_ECC_EN);
-+ if (ret != 0) {
-+ printk("%s, fail write sandbox_page \n", __func__);
-+ return -1;
-+ }
-+#else
-+ /** @note:
-+ * The following command is actually not 'write' command to drive NFC to write flash.
-+ * However, it can make NFC to calculate ECC, that will be used to compare with original ones.
-+ * --YT
-+ */
-+ unsigned int conf = 0x001223| (CFG_ADDR_CYCLE<<16) | (0x200 << 20) | (1<<3) | (1<<2);
-+ _nfc_write_raw_data(0xff, 0xff, ra->sandbox_page<<ra->page_shift, conf, buf, 0x200, FLAG_USE_GDMA);
-+#endif
-+
-+ ecc = ra_inl(NFC_ECC);
-+ if (ecc == 0) //clean page.
-+ return 0;
-+ e = (char*)&ecc;
-+ p = buf + (1<<ra->page_shift);
-+ for (i=0; i<CONFIG_ECC_BYTES; i++) {
-+ int eccpos = CONFIG_ECC_OFFSET + i;
-+ if (*(p + eccpos) != *(e + i)) {
-+ printk("%s mode:%s, invalid ecc, page: %x read:%x %x %x, write:%x \n",
-+ __func__, (mode == FL_READING)?"read":"write", page,
-+ *(p+ CONFIG_ECC_OFFSET), *(p+ CONFIG_ECC_OFFSET+1), *(p+ CONFIG_ECC_OFFSET +2), ecc);
-+
-+ for (i=0; i<528; i++)
-+ printk("%-2x \n", *(buf + i));
-+ return -1;
-+ }
-+ }
-+ return 0;
-+ }
-+
-+ return -1;
-+
-+}
-+
-+#endif
-+
-+
-+/**
-+ * @return -EIO, writing size is less than a page
-+ * @return 0, OK
-+ */
-+int nfc_read_page(struct ra_nand_chip *ra, char *buf, int page, int flags)
-+{
-+ unsigned int cmd1 = 0, cmd2 = 0, conf = 0;
-+ unsigned int bus_addr = 0, bus_addr2 = 0;
-+ unsigned int ecc_en;
-+ int use_gdma;
-+ int size, offs;
-+ int status = 0;
-+
-+ use_gdma = flags & FLAG_USE_GDMA;
-+ ecc_en = flags & FLAG_ECC_EN;
-+
-+ page = page & (CFG_CHIPSIZE - 1); // chip boundary
-+ size = CFG_PAGESIZE + CFG_PAGE_OOBSIZE; //add oobsize
-+ offs = 0;
-+
-+ while (size > 0) {
-+ int len;
-+#if defined (WORKAROUND_RX_BUF_OV)
-+ len = min(60, size);
-+#else
-+ len = size;
-+#endif
-+ bus_addr = (page << (CFG_COLUMN_ADDR_CYCLE*8)) | (offs & ((1<<CFG_COLUMN_ADDR_CYCLE*8)-1));
-+ if (is_nand_page_2048) {
-+ bus_addr2 = page >> (CFG_COLUMN_ADDR_CYCLE*8);
-+ cmd1 = 0x0;
-+ cmd2 = 0x30;
-+ conf = 0x000511| ((CFG_ADDR_CYCLE)<<16) | (len << 20);
-+ }
-+ else {
-+ if (offs & ~(CFG_PAGESIZE-1))
-+ cmd1 = 0x50;
-+ else if (offs & ~((1<<CFG_COLUMN_ADDR_CYCLE*8)-1))
-+ cmd1 = 0x01;
-+ else
-+ cmd1 = 0;
-+
-+ conf = 0x000141| ((CFG_ADDR_CYCLE)<<16) | (len << 20);
-+ }
-+#if !defined (WORKAROUND_RX_BUF_OV)
-+ if (ecc_en)
-+ conf |= (1<<3);
-+#endif
-+ if (use_gdma)
-+ conf |= (1<<2);
-+
-+ status = _nfc_read_raw_data(cmd1, cmd2, bus_addr, bus_addr2, conf, buf+offs, len, flags);
-+ if (status & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ return -EIO;
-+ }
-+
-+ offs += len;
-+ size -= len;
-+ }
-+
-+ // verify and correct ecc
-+ if ((flags & (FLAG_VERIFY | FLAG_ECC_EN)) == (FLAG_VERIFY | FLAG_ECC_EN)) {
-+ status = nfc_ecc_verify(ra, buf, page, FL_READING);
-+ if (status != 0) {
-+ printk("%s: fail, buf:%x, page:%x, flag:%x\n",
-+ __func__, (unsigned int)buf, page, flags);
-+ return -EBADMSG;
-+ }
-+ }
-+ else {
-+ // fix,e not yet support
-+ ra->buffers_page = -1; //cached
-+ }
-+
-+ return 0;
-+}
-+
-+
-+/**
-+ * @return -EIO, fail to write
-+ * @return 0, OK
-+ */
-+int nfc_write_page(struct ra_nand_chip *ra, char *buf, int page, int flags)
-+{
-+ unsigned int cmd1 = 0, cmd3, conf = 0;
-+ unsigned int bus_addr = 0, bus_addr2 = 0;
-+ unsigned int ecc_en;
-+ int use_gdma;
-+ int size;
-+ char status;
-+ uint8_t *oob = buf + (1<<ra->page_shift);
-+
-+ use_gdma = flags & FLAG_USE_GDMA;
-+ ecc_en = flags & FLAG_ECC_EN;
-+
-+ oob[ra->badblockpos] = 0xff; //tag as good block.
-+ ra->buffers_page = -1; //cached
-+
-+ page = page & (CFG_CHIPSIZE-1); //chip boundary
-+ size = CFG_PAGESIZE + CFG_PAGE_OOBSIZE; //add oobsize
-+ bus_addr = (page << (CFG_COLUMN_ADDR_CYCLE*8)); //write_page always write from offset 0.
-+
-+ if (is_nand_page_2048) {
-+ bus_addr2 = page >> (CFG_COLUMN_ADDR_CYCLE*8);
-+ cmd1 = 0x80;
-+ cmd3 = 0x10;
-+ conf = 0x001123| ((CFG_ADDR_CYCLE)<<16) | (size << 20);
-+ }
-+ else {
-+ cmd1 = 0x8000;
-+ cmd3 = 0x10;
-+ conf = 0x001223| ((CFG_ADDR_CYCLE)<<16) | (size << 20);
-+}
-+ if (ecc_en)
-+ conf |= (1<<3); //enable ecc
-+ if (use_gdma)
-+ conf |= (1<<2);
-+
-+ // set NFC
-+ ra_dbg("nfc_write_page: cmd1: %x, cmd3: %x bus_addr: %x, conf: %x, len:%x\n",
-+ cmd1, cmd3, bus_addr, conf, size);
-+
-+ status = _nfc_write_raw_data(cmd1, cmd3, bus_addr, bus_addr2, conf, buf, size, flags);
-+ if (status & NAND_STATUS_FAIL) {
-+ printk("%s: fail \n", __func__);
-+ return -EIO;
-+ }
-+
-+
-+ if (flags & FLAG_VERIFY) { // verify and correct ecc
-+ status = nfc_ecc_verify(ra, buf, page, FL_WRITING);
-+
-+#ifdef RANDOM_GEN_BAD_BLOCK
-+ if (((random32() & 0x1ff) == 0x0) && (page >= 0x100)) // randomly create bad block
-+ {
-+ printk("hmm... create a bad block at page %x\n", (bus_addr >> 16));
-+ status = -1;
-+ }
-+#endif
-+
-+ if (status != 0) {
-+ printk("%s: ecc_verify fail: ret:%x \n", __func__, status);
-+ oob[ra->badblockpos] = 0x33;
-+ page -= page % (CFG_BLOCKSIZE/CFG_PAGESIZE);
-+ printk("create a bad block at page %x\n", page);
-+ if (!is_nand_page_2048)
-+ status = nfc_write_oob(ra, page, ra->badblockpos, oob+ra->badblockpos, 1, flags);
-+ else
-+ {
-+ status = _nfc_write_raw_data(cmd1, cmd3, bus_addr, bus_addr2, conf, buf, size, flags);
-+ nfc_write_oob(ra, page, 0, oob, 16, FLAG_NONE);
-+ }
-+ return -EBADMSG;
-+ }
-+ }
-+
-+
-+ ra->buffers_page = page; //cached
-+ return 0;
-+}
-+
-+
-+
-+/*************************************************************
-+ * nand internal process
-+ *************************************************************/
-+
-+/**
-+ * nand_release_device - [GENERIC] release chip
-+ * @mtd: MTD device structure
-+ *
-+ * Deselect, release chip lock and wake up anyone waiting on the device
-+ */
-+static void nand_release_device(struct ra_nand_chip *ra)
-+{
-+ /* De-select the NAND device */
-+ nfc_select_chip(ra, -1);
-+
-+ /* Release the controller and the chip */
-+ ra->state = FL_READY;
-+
-+ mutex_unlock(ra->controller);
-+}
-+
-+/**
-+ * nand_get_device - [GENERIC] Get chip for selected access
-+ * @chip: the nand chip descriptor
-+ * @mtd: MTD device structure
-+ * @new_state: the state which is requested
-+ *
-+ * Get the device and lock it for exclusive access
-+ */
-+static int
-+nand_get_device(struct ra_nand_chip *ra, int new_state)
-+{
-+ int ret = 0;
-+
-+ ret = mutex_lock_interruptible(ra->controller);
-+ if (!ret)
-+ ra->state = new_state;
-+
-+ return ret;
-+
-+}
-+
-+
-+
-+/*************************************************************
-+ * nand internal process
-+ *************************************************************/
-+
-+int nand_bbt_get(struct ra_nand_chip *ra, int block)
-+{
-+ int byte, bits;
-+ bits = block * BBTTAG_BITS;
-+
-+ byte = bits / 8;
-+ bits = bits % 8;
-+
-+ return (ra->bbt[byte] >> bits) & BBTTAG_BITS_MASK;
-+}
-+
-+int nand_bbt_set(struct ra_nand_chip *ra, int block, int tag)
-+{
-+ int byte, bits;
-+ bits = block * BBTTAG_BITS;
-+
-+ byte = bits / 8;
-+ bits = bits % 8;
-+
-+ // If previous tag is bad, dont overwrite it
-+ if (((ra->bbt[byte] >> bits) & BBTTAG_BITS_MASK) == BBT_TAG_BAD)
-+ {
-+ return BBT_TAG_BAD;
-+ }
-+
-+ ra->bbt[byte] = (ra->bbt[byte] & ~(BBTTAG_BITS_MASK << bits)) | ((tag & BBTTAG_BITS_MASK) << bits);
-+
-+ return tag;
-+}
-+
-+/**
-+ * nand_block_checkbad - [GENERIC] Check if a block is marked bad
-+ * @mtd: MTD device structure
-+ * @ofs: offset from device start
-+ *
-+ * Check, if the block is bad. Either by reading the bad block table or
-+ * calling of the scan function.
-+ */
-+int nand_block_checkbad(struct ra_nand_chip *ra, loff_t offs)
-+{
-+ int page, block;
-+ int ret = 4;
-+ unsigned int tag;
-+ char *str[]= {"UNK", "RES", "BAD", "GOOD"};
-+
-+ if (ranfc_bbt == 0)
-+ return 0;
-+
-+ {
-+ // align with chip
-+
-+ offs = offs & ((1<<ra->chip_shift) -1);
-+
-+ page = offs >> ra->page_shift;
-+ block = offs >> ra->erase_shift;
-+ }
-+
-+ tag = nand_bbt_get(ra, block);
-+
-+ if (tag == BBT_TAG_UNKNOWN) {
-+ ret = nfc_read_oob(ra, page, ra->badblockpos, (char*)&tag, 1, FLAG_NONE);
-+ if (ret == 0)
-+ tag = ((le32_to_cpu(tag) & 0x0ff) == 0x0ff) ? BBT_TAG_GOOD : BBT_TAG_BAD;
-+ else
-+ tag = BBT_TAG_BAD;
-+
-+ nand_bbt_set(ra, block, tag);
-+ }
-+
-+ if (tag != BBT_TAG_GOOD) {
-+ printk("%s: offs:%x tag: %s \n", __func__, (unsigned int)offs, str[tag]);
-+ return 1;
-+ }
-+ else
-+ return 0;
-+
-+}
-+
-+
-+
-+/**
-+ * nand_block_markbad -
-+ */
-+int nand_block_markbad(struct ra_nand_chip *ra, loff_t offs)
-+{
-+ int page, block;
-+ int ret = 4;
-+ unsigned int tag;
-+ char *ecc;
-+
-+ // align with chip
-+ ra_dbg("%s offs: %x \n", __func__, (int)offs);
-+
-+ offs = offs & ((1<<ra->chip_shift) -1);
-+
-+ page = offs >> ra->page_shift;
-+ block = offs >> ra->erase_shift;
-+
-+ tag = nand_bbt_get(ra, block);
-+
-+ if (tag == BBT_TAG_BAD) {
-+ printk("%s: mark repeatedly \n", __func__);
-+ return 0;
-+ }
-+
-+ // new tag as bad
-+ tag =BBT_TAG_BAD;
-+ ret = nfc_read_page(ra, ra->buffers, page, FLAG_NONE);
-+ if (ret != 0) {
-+ printk("%s: fail to read bad block tag \n", __func__);
-+ goto tag_bbt;
-+ }
-+
-+ ecc = &ra->buffers[(1<<ra->page_shift)+ra->badblockpos];
-+ if (*ecc == (char)0x0ff) {
-+ //tag into flash
-+ *ecc = (char)tag;
-+ ret = nfc_write_page(ra, ra->buffers, page, FLAG_USE_GDMA);
-+ if (ret)
-+ printk("%s: fail to write bad block tag \n", __func__);
-+
-+ }
-+
-+tag_bbt:
-+ //update bbt
-+ nand_bbt_set(ra, block, tag);
-+
-+ return 0;
-+}
-+
-+
-+#if defined (WORKAROUND_RX_BUF_OV)
-+/**
-+ * to find a bad block for ecc verify of read_page
-+ */
-+unsigned int nand_bbt_find_sandbox(struct ra_nand_chip *ra)
-+{
-+ loff_t offs = 0;
-+ int chipsize = 1 << ra->chip_shift;
-+ int blocksize = 1 << ra->erase_shift;
-+
-+
-+ while (offs < chipsize) {
-+ if (nand_block_checkbad(ra, offs)) //scan and verify the unknown tag
-+ break;
-+ offs += blocksize;
-+ }
-+
-+ if (offs >= chipsize) {
-+ offs = chipsize - blocksize;
-+ }
-+
-+ nand_bbt_set(ra, (unsigned int)offs>>ra->erase_shift, BBT_TAG_RES); // tag bbt only, instead of update badblockpos of flash.
-+ return (offs >> ra->page_shift);
-+}
-+#endif
-+
-+
-+
-+/**
-+ * nand_erase_nand - [Internal] erase block(s)
-+ * @mtd: MTD device structure
-+ * @instr: erase instruction
-+ * @allowbbt: allow erasing the bbt area
-+ *
-+ * Erase one ore more blocks
-+ */
-+int _nand_erase_nand(struct ra_nand_chip *ra, struct erase_info *instr)
-+{
-+ int page, len, status, ret;
-+ unsigned int addr, blocksize = 1<<ra->erase_shift;
-+
-+ ra_dbg("%s: start:%x, len:%x \n", __func__,
-+ (unsigned int)instr->addr, (unsigned int)instr->len);
-+
-+//#define BLOCK_ALIGNED(a) ((a) & (blocksize - 1)) // already defined
-+
-+ if (BLOCK_ALIGNED(instr->addr) || BLOCK_ALIGNED(instr->len)) {
-+ ra_dbg("%s: erase block not aligned, addr:%x len:%x\n", __func__, instr->addr, instr->len);
-+ return -EINVAL;
-+ }
-+
-+ instr->fail_addr = 0xffffffff;
-+
-+ len = instr->len;
-+ addr = instr->addr;
-+ instr->state = MTD_ERASING;
-+
-+ while (len) {
-+
-+ page = (int)(addr >> ra->page_shift);
-+
-+ /* select device and check wp */
-+ if (nfc_enable_chip(ra, addr, 0)) {
-+ printk("%s: nand is write protected \n", __func__);
-+ instr->state = MTD_ERASE_FAILED;
-+ goto erase_exit;
-+ }
-+
-+ /* if we have a bad block, we do not erase bad blocks */
-+ if (nand_block_checkbad(ra, addr)) {
-+ printk(KERN_WARNING "nand_erase: attempt to erase a "
-+ "bad block at 0x%08x\n", addr);
-+ instr->state = MTD_ERASE_FAILED;
-+ goto erase_exit;
-+ }
-+
-+ /*
-+ * Invalidate the page cache, if we erase the block which
-+ * contains the current cached page
-+ */
-+ if (BLOCK_ALIGNED(addr) == BLOCK_ALIGNED(ra->buffers_page << ra->page_shift))
-+ ra->buffers_page = -1;
-+
-+ status = nfc_erase_block(ra, page);
-+ /* See if block erase succeeded */
-+ if (status) {
-+ printk("%s: failed erase, page 0x%08x\n", __func__, page);
-+ instr->state = MTD_ERASE_FAILED;
-+ instr->fail_addr = (page << ra->page_shift);
-+ goto erase_exit;
-+ }
-+
-+
-+ /* Increment page address and decrement length */
-+ len -= blocksize;
-+ addr += blocksize;
-+
-+ }
-+ instr->state = MTD_ERASE_DONE;
-+
-+erase_exit:
-+
-+ ret = ((instr->state == MTD_ERASE_DONE) ? 0 : -EIO);
-+ /* Do call back function */
-+ if (!ret)
-+ mtd_erase_callback(instr);
-+
-+ if (ret) {
-+ nand_bbt_set(ra, addr >> ra->erase_shift, BBT_TAG_BAD);
-+ }
-+
-+ /* Return more or less happy */
-+ return ret;
-+}
-+
-+static int
-+nand_write_oob_buf(struct ra_nand_chip *ra, uint8_t *buf, uint8_t *oob, size_t size,
-+ int mode, int ooboffs)
-+{
-+ size_t oobsize = 1<<ra->oob_shift;
-+ struct nand_oobfree *free;
-+ uint32_t woffs = ooboffs;
-+ int retsize = 0;
-+
-+ ra_dbg("%s: size:%x, mode:%x, offs:%x \n", __func__, size, mode, ooboffs);
-+
-+ switch(mode) {
-+ case MTD_OPS_PLACE_OOB:
-+ case MTD_OPS_RAW:
-+ if (ooboffs > oobsize)
-+ return -1;
-+
-+ size = min(size, oobsize - ooboffs);
-+ memcpy(buf + ooboffs, oob, size);
-+ retsize = size;
-+ break;
-+
-+ case MTD_OPS_AUTO_OOB:
-+ if (ooboffs > ra->oob->oobavail)
-+ return -1;
-+
-+ while (size) {
-+ for(free = ra->oob->oobfree; free->length && size; free++) {
-+ int wlen = free->length - woffs;
-+ int bytes = 0;
-+
-+ /* Write request not from offset 0 ? */
-+ if (wlen <= 0) {
-+ woffs = -wlen;
-+ continue;
-+ }
-+
-+ bytes = min_t(size_t, size, wlen);
-+ memcpy (buf + free->offset + woffs, oob, bytes);
-+ woffs = 0;
-+ oob += bytes;
-+ size -= bytes;
-+ retsize += bytes;
-+ }
-+ buf += oobsize;
-+ }
-+ break;
-+
-+ default:
-+ BUG();
-+ }
-+
-+ return retsize;
-+}
-+
-+static int nand_read_oob_buf(struct ra_nand_chip *ra, uint8_t *oob, size_t size,
-+ int mode, int ooboffs)
-+{
-+ size_t oobsize = 1<<ra->oob_shift;
-+ uint8_t *buf = ra->buffers + (1<<ra->page_shift);
-+ int retsize=0;
-+
-+ ra_dbg("%s: size:%x, mode:%x, offs:%x \n", __func__, size, mode, ooboffs);
-+
-+ switch(mode) {
-+ case MTD_OPS_PLACE_OOB:
-+ case MTD_OPS_RAW:
-+ if (ooboffs > oobsize)
-+ return -1;
-+
-+ size = min(size, oobsize - ooboffs);
-+ memcpy(oob, buf + ooboffs, size);
-+ return size;
-+
-+ case MTD_OPS_AUTO_OOB: {
-+ struct nand_oobfree *free;
-+ uint32_t woffs = ooboffs;
-+
-+ if (ooboffs > ra->oob->oobavail)
-+ return -1;
-+
-+ size = min(size, ra->oob->oobavail - ooboffs);
-+ for(free = ra->oob->oobfree; free->length && size; free++) {
-+ int wlen = free->length - woffs;
-+ int bytes = 0;
-+
-+ /* Write request not from offset 0 ? */
-+ if (wlen <= 0) {
-+ woffs = -wlen;
-+ continue;
-+ }
-+
-+ bytes = min_t(size_t, size, wlen);
-+ memcpy (oob, buf + free->offset + woffs, bytes);
-+ woffs = 0;
-+ oob += bytes;
-+ size -= bytes;
-+ retsize += bytes;
-+ }
-+ return retsize;
-+ }
-+ default:
-+ BUG();
-+ }
-+
-+ return -1;
-+}
-+
-+/**
-+ * nand_do_write_ops - [Internal] NAND write with ECC
-+ * @mtd: MTD device structure
-+ * @to: offset to write to
-+ * @ops: oob operations description structure
-+ *
-+ * NAND write with ECC
-+ */
-+static int nand_do_write_ops(struct ra_nand_chip *ra, loff_t to,
-+ struct mtd_oob_ops *ops)
-+{
-+ int page;
-+ uint32_t datalen = ops->len;
-+ uint32_t ooblen = ops->ooblen;
-+ uint8_t *oob = ops->oobbuf;
-+ uint8_t *data = ops->datbuf;
-+ int pagesize = (1<<ra->page_shift);
-+ int pagemask = (pagesize -1);
-+ int oobsize = 1<<ra->oob_shift;
-+ loff_t addr = to;
-+ //int i = 0; //for ra_dbg only
-+
-+ ra_dbg("%s: to:%x, ops data:%p, oob:%p datalen:%x ooblen:%x, ooboffs:%x oobmode:%x \n",
-+ __func__, (unsigned int)to, data, oob, datalen, ooblen, ops->ooboffs, ops->mode);
-+
-+ ops->retlen = 0;
-+ ops->oobretlen = 0;
-+
-+
-+ /* Invalidate the page cache, when we write to the cached page */
-+ ra->buffers_page = -1;
-+
-+
-+ if (data ==0)
-+ datalen = 0;
-+
-+ // oob sequential (burst) write
-+ if (datalen == 0 && ooblen) {
-+ int len = ((ooblen + ops->ooboffs) + (ra->oob->oobavail - 1)) / ra->oob->oobavail * oobsize;
-+
-+ /* select chip, and check if it is write protected */
-+ if (nfc_enable_chip(ra, addr, 0))
-+ return -EIO;
-+
-+ //FIXME, need sanity check of block boundary
-+ page = (int)((to & ((1<<ra->chip_shift)-1)) >> ra->page_shift); //chip boundary
-+ memset(ra->buffers, 0x0ff, pagesize);
-+ //fixme, should we reserve the original content?
-+ if (ops->mode == MTD_OPS_AUTO_OOB) {
-+ nfc_read_oob(ra, page, 0, ra->buffers, len, FLAG_NONE);
-+ }
-+ //prepare buffers
-+ if (ooblen != 8)
-+ {
-+ nand_write_oob_buf(ra, ra->buffers, oob, ooblen, ops->mode, ops->ooboffs);
-+ // write out buffer to chip
-+ nfc_write_oob(ra, page, 0, ra->buffers, len, FLAG_USE_GDMA);
-+ }
-+
-+ ops->oobretlen = ooblen;
-+ ooblen = 0;
-+ }
-+
-+ // data sequential (burst) write
-+ if (datalen && ooblen == 0) {
-+ // ranfc can not support write_data_burst, since hw-ecc and fifo constraints..
-+ }
-+
-+ // page write
-+ while(datalen || ooblen) {
-+ int len;
-+ int ret;
-+ int offs;
-+ int ecc_en = 0;
-+
-+ ra_dbg("%s (%d): addr:%x, ops data:%p, oob:%p datalen:%x ooblen:%x, ooboffs:%x \n",
-+ __func__, i++, (unsigned int)addr, data, oob, datalen, ooblen, ops->ooboffs);
-+
-+ page = (int)((addr & ((1<<ra->chip_shift)-1)) >> ra->page_shift); //chip boundary
-+
-+ /* select chip, and check if it is write protected */
-+ if (nfc_enable_chip(ra, addr, 0))
-+ return -EIO;
-+
-+ // oob write
-+ if (ops->mode == MTD_OPS_AUTO_OOB) {
-+ //fixme, this path is not yet varified
-+ nfc_read_oob(ra, page, 0, ra->buffers + pagesize, oobsize, FLAG_NONE);
-+ }
-+ if (oob && ooblen > 0) {
-+ len = nand_write_oob_buf(ra, ra->buffers + pagesize, oob, ooblen, ops->mode, ops->ooboffs);
-+ if (len < 0)
-+ return -EINVAL;
-+
-+ oob += len;
-+ ops->oobretlen += len;
-+ ooblen -= len;
-+ }
-+
-+ // data write
-+ offs = addr & pagemask;
-+ len = min_t(size_t, datalen, pagesize - offs);
-+ if (data && len > 0) {
-+ memcpy(ra->buffers + offs, data, len); // we can not sure ops->buf wether is DMA-able.
-+
-+ data += len;
-+ datalen -= len;
-+ ops->retlen += len;
-+
-+ ecc_en = FLAG_ECC_EN;
-+ }
-+ ret = nfc_write_page(ra, ra->buffers, page, FLAG_USE_GDMA | FLAG_VERIFY |
-+ ((ops->mode == MTD_OPS_RAW || ops->mode == MTD_OPS_PLACE_OOB) ? 0 : ecc_en ));
-+ if (ret) {
-+ nand_bbt_set(ra, addr >> ra->erase_shift, BBT_TAG_BAD);
-+ return ret;
-+ }
-+
-+ nand_bbt_set(ra, addr >> ra->erase_shift, BBT_TAG_GOOD);
-+
-+ addr = (page+1) << ra->page_shift;
-+
-+ }
-+ return 0;
-+}
-+
-+/**
-+ * nand_do_read_ops - [Internal] Read data with ECC
-+ *
-+ * @mtd: MTD device structure
-+ * @from: offset to read from
-+ * @ops: oob ops structure
-+ *
-+ * Internal function. Called with chip held.
-+ */
-+static int nand_do_read_ops(struct ra_nand_chip *ra, loff_t from,
-+ struct mtd_oob_ops *ops)
-+{
-+ int page;
-+ uint32_t datalen = ops->len;
-+ uint32_t ooblen = ops->ooblen;
-+ uint8_t *oob = ops->oobbuf;
-+ uint8_t *data = ops->datbuf;
-+ int pagesize = (1<<ra->page_shift);
-+ int pagemask = (pagesize -1);
-+ loff_t addr = from;
-+ //int i = 0; //for ra_dbg only
-+
-+ ra_dbg("%s: addr:%x, ops data:%p, oob:%p datalen:%x ooblen:%x, ooboffs:%x \n",
-+ __func__, (unsigned int)addr, data, oob, datalen, ooblen, ops->ooboffs);
-+
-+ ops->retlen = 0;
-+ ops->oobretlen = 0;
-+ if (data == 0)
-+ datalen = 0;
-+
-+
-+ while(datalen || ooblen) {
-+ int len;
-+ int ret;
-+ int offs;
-+
-+ ra_dbg("%s (%d): addr:%x, ops data:%p, oob:%p datalen:%x ooblen:%x, ooboffs:%x \n",
-+ __func__, i++, (unsigned int)addr, data, oob, datalen, ooblen, ops->ooboffs);
-+ /* select chip */
-+ if (nfc_enable_chip(ra, addr, 1) < 0)
-+ return -EIO;
-+
-+ page = (int)((addr & ((1<<ra->chip_shift)-1)) >> ra->page_shift);
-+
-+ ret = nfc_read_page(ra, ra->buffers, page, FLAG_VERIFY |
-+ ((ops->mode == MTD_OPS_RAW || ops->mode == MTD_OPS_PLACE_OOB) ? 0: FLAG_ECC_EN ));
-+ //FIXME, something strange here, some page needs 2 more tries to guarantee read success.
-+ if (ret) {
-+ printk("read again:\n");
-+ ret = nfc_read_page(ra, ra->buffers, page, FLAG_VERIFY |
-+ ((ops->mode == MTD_OPS_RAW || ops->mode == MTD_OPS_PLACE_OOB) ? 0: FLAG_ECC_EN ));
-+
-+ if (ret) {
-+ printk("read again fail \n");
-+ nand_bbt_set(ra, addr >> ra->erase_shift, BBT_TAG_BAD);
-+ if ((ret != -EUCLEAN) && (ret != -EBADMSG)) {
-+ return ret;
-+ }
-+ else {
-+ /* ecc verification fail, but data need to be returned. */
-+ }
-+ }
-+ else {
-+ printk(" read agian susccess \n");
-+ }
-+ }
-+
-+ // oob read
-+ if (oob && ooblen > 0) {
-+ len = nand_read_oob_buf(ra, oob, ooblen, ops->mode, ops->ooboffs);
-+ if (len < 0) {
-+ printk("nand_read_oob_buf: fail return %x \n", len);
-+ return -EINVAL;
-+ }
-+
-+ oob += len;
-+ ops->oobretlen += len;
-+ ooblen -= len;
-+ }
-+
-+ // data read
-+ offs = addr & pagemask;
-+ len = min_t(size_t, datalen, pagesize - offs);
-+ if (data && len > 0) {
-+ memcpy(data, ra->buffers + offs, len); // we can not sure ops->buf wether is DMA-able.
-+
-+ data += len;
-+ datalen -= len;
-+ ops->retlen += len;
-+ if (ret)
-+ return ret;
-+ }
-+
-+
-+ nand_bbt_set(ra, addr >> ra->erase_shift, BBT_TAG_GOOD);
-+ // address go further to next page, instead of increasing of length of write. This avoids some special cases wrong.
-+ addr = (page+1) << ra->page_shift;
-+ }
-+ return 0;
-+}
-+
-+static int
-+ramtd_nand_erase(struct mtd_info *mtd, struct erase_info *instr)
-+{
-+ struct ra_nand_chip *ra = (struct ra_nand_chip *)mtd->priv;
-+ int ret;
-+
-+ ra_dbg("%s: start:%x, len:%x \n", __func__,
-+ (unsigned int)instr->addr, (unsigned int)instr->len);
-+
-+ nand_get_device(ra, FL_ERASING);
-+ ret = _nand_erase_nand((struct ra_nand_chip *)mtd->priv, instr);
-+ nand_release_device(ra);
-+
-+ return ret;
-+}
-+
-+static int
-+ramtd_nand_write(struct mtd_info *mtd, loff_t to, size_t len,
-+ size_t *retlen, const uint8_t *buf)
-+{
-+ struct ra_nand_chip *ra = mtd->priv;
-+ struct mtd_oob_ops ops;
-+ int ret;
-+
-+ ra_dbg("%s: to 0x%x len=0x%x\n", __func__, to, len);
-+
-+ if ((to + len) > mtd->size)
-+ return -EINVAL;
-+
-+ if (!len)
-+ return 0;
-+
-+ nand_get_device(ra, FL_WRITING);
-+
-+ memset(&ops, 0, sizeof(ops));
-+ ops.len = len;
-+ ops.datbuf = (uint8_t *)buf;
-+ ops.oobbuf = NULL;
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+
-+ ret = nand_do_write_ops(ra, to, &ops);
-+
-+ *retlen = ops.retlen;
-+
-+ nand_release_device(ra);
-+
-+ return ret;
-+}
-+
-+static int
-+ramtd_nand_read(struct mtd_info *mtd, loff_t from, size_t len,
-+ size_t *retlen, uint8_t *buf)
-+{
-+
-+ struct ra_nand_chip *ra = mtd->priv;
-+ int ret;
-+ struct mtd_oob_ops ops;
-+
-+ ra_dbg("%s: mtd:%p from:%x, len:%x, buf:%p \n", __func__, mtd, (unsigned int)from, len, buf);
-+
-+ /* Do not allow reads past end of device */
-+ if ((from + len) > mtd->size)
-+ return -EINVAL;
-+ if (!len)
-+ return 0;
-+
-+ nand_get_device(ra, FL_READING);
-+
-+ memset(&ops, 0, sizeof(ops));
-+ ops.len = len;
-+ ops.datbuf = buf;
-+ ops.oobbuf = NULL;
-+ ops.mode = MTD_OPS_AUTO_OOB;
-+
-+ ret = nand_do_read_ops(ra, from, &ops);
-+
-+ *retlen = ops.retlen;
-+
-+ nand_release_device(ra);
-+
-+ return ret;
-+
-+}
-+
-+static int
-+ramtd_nand_readoob(struct mtd_info *mtd, loff_t from,
-+ struct mtd_oob_ops *ops)
-+{
-+ struct ra_nand_chip *ra = mtd->priv;
-+ int ret;
-+
-+ ra_dbg("%s: \n", __func__);
-+
-+ nand_get_device(ra, FL_READING);
-+
-+ ret = nand_do_read_ops(ra, from, ops);
-+
-+ nand_release_device(ra);
-+
-+ return ret;
-+}
-+
-+static int
-+ramtd_nand_writeoob(struct mtd_info *mtd, loff_t to,
-+ struct mtd_oob_ops *ops)
-+{
-+ struct ra_nand_chip *ra = mtd->priv;
-+ int ret;
-+
-+ nand_get_device(ra, FL_READING);
-+ ret = nand_do_write_ops(ra, to, ops);
-+ nand_release_device(ra);
-+
-+ return ret;
-+}
-+
-+static int
-+ramtd_nand_block_isbad(struct mtd_info *mtd, loff_t offs)
-+{
-+ if (offs > mtd->size)
-+ return -EINVAL;
-+
-+ return nand_block_checkbad((struct ra_nand_chip *)mtd->priv, offs);
-+}
-+
-+static int
-+ramtd_nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
-+{
-+ struct ra_nand_chip *ra = mtd->priv;
-+ int ret;
-+
-+ ra_dbg("%s: \n", __func__);
-+ nand_get_device(ra, FL_WRITING);
-+ ret = nand_block_markbad(ra, ofs);
-+ nand_release_device(ra);
-+
-+ return ret;
-+}
-+
-+// 1-bit error detection
-+static int one_bit_correction(char *ecc1, char *ecc2, int *bytes, int *bits)
-+{
-+ // check if ecc and expected are all valid
-+ char *p, nibble, crumb;
-+ int i, xor, iecc1 = 0, iecc2 = 0;
-+
-+ printk("correction : %x %x %x\n", ecc1[0], ecc1[1], ecc1[2]);
-+ printk("correction : %x %x %x\n", ecc2[0], ecc2[1], ecc2[2]);
-+
-+ p = (char *)ecc1;
-+ for (i = 0; i < CONFIG_ECC_BYTES; i++)
-+ {
-+ nibble = *(p+i) & 0xf;
-+ if ((nibble != 0x0) && (nibble != 0xf) && (nibble != 0x3) && (nibble != 0xc) &&
-+ (nibble != 0x5) && (nibble != 0xa) && (nibble != 0x6) && (nibble != 0x9))
-+ return -1;
-+ nibble = ((*(p+i)) >> 4) & 0xf;
-+ if ((nibble != 0x0) && (nibble != 0xf) && (nibble != 0x3) && (nibble != 0xc) &&
-+ (nibble != 0x5) && (nibble != 0xa) && (nibble != 0x6) && (nibble != 0x9))
-+ return -1;
-+ }
-+
-+ p = (char *)ecc2;
-+ for (i = 0; i < CONFIG_ECC_BYTES; i++)
-+ {
-+ nibble = *(p+i) & 0xf;
-+ if ((nibble != 0x0) && (nibble != 0xf) && (nibble != 0x3) && (nibble != 0xc) &&
-+ (nibble != 0x5) && (nibble != 0xa) && (nibble != 0x6) && (nibble != 0x9))
-+ return -1;
-+ nibble = ((*(p+i)) >> 4) & 0xf;
-+ if ((nibble != 0x0) && (nibble != 0xf) && (nibble != 0x3) && (nibble != 0xc) &&
-+ (nibble != 0x5) && (nibble != 0xa) && (nibble != 0x6) && (nibble != 0x9))
-+ return -1;
-+ }
-+
-+ memcpy(&iecc1, ecc1, 3);
-+ memcpy(&iecc2, ecc2, 3);
-+
-+ xor = iecc1 ^ iecc2;
-+ printk("xor = %x (%x %x)\n", xor, iecc1, iecc2);
-+
-+ *bytes = 0;
-+ for (i = 0; i < 9; i++)
-+ {
-+ crumb = (xor >> (2*i)) & 0x3;
-+ if ((crumb == 0x0) || (crumb == 0x3))
-+ return -1;
-+ if (crumb == 0x2)
-+ *bytes += (1 << i);
-+ }
-+
-+ *bits = 0;
-+ for (i = 0; i < 3; i++)
-+ {
-+ crumb = (xor >> (18 + 2*i)) & 0x3;
-+ if ((crumb == 0x0) || (crumb == 0x3))
-+ return -1;
-+ if (crumb == 0x2)
-+ *bits += (1 << i);
-+ }
-+
-+ return 0;
-+}
-+
-+
-+
-+/************************************************************
-+ * the init/exit section.
-+ */
-+
-+static struct nand_ecclayout ra_oob_layout = {
-+ .eccbytes = CONFIG_ECC_BYTES,
-+ .eccpos = {5, 6, 7},
-+ .oobfree = {
-+ {.offset = 0, .length = 4},
-+ {.offset = 8, .length = 8},
-+ {.offset = 0, .length = 0}
-+ },
-+#define RA_CHIP_OOB_AVAIL (4+8)
-+ .oobavail = RA_CHIP_OOB_AVAIL,
-+ // 5th byte is bad-block flag.
-+};
-+
-+static int
-+mtk_nand_probe(struct platform_device *pdev)
-+{
-+ struct mtd_part_parser_data ppdata;
-+ struct ra_nand_chip *ra;
-+ int alloc_size, bbt_size, buffers_size, reg, err;
-+ unsigned char chip_mode = 12;
-+
-+/* if(ra_check_flash_type()!=BOOT_FROM_NAND) {
-+ return 0;
-+ }*/
-+
-+ //FIXME: config 512 or 2048-byte page according to HWCONF
-+#if defined (CONFIG_RALINK_RT6855A)
-+ reg = ra_inl(RALINK_SYSCTL_BASE+0x8c);
-+ chip_mode = ((reg>>28) & 0x3)|(((reg>>22) & 0x3)<<2);
-+ if (chip_mode == 1) {
-+ printk("! nand 2048\n");
-+ ra_or(NFC_CONF1, 1);
-+ is_nand_page_2048 = 1;
-+ nand_addrlen = 5;
-+ }
-+ else {
-+ printk("! nand 512\n");
-+ ra_and(NFC_CONF1, ~1);
-+ is_nand_page_2048 = 0;
-+ nand_addrlen = 4;
-+ }
-+#elif (defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_RT6855))
-+ ra_outl(RALINK_SYSCTL_BASE+0x60, ra_inl(RALINK_SYSCTL_BASE+0x60) & ~(0x3<<18));
-+ reg = ra_inl(RALINK_SYSCTL_BASE+0x10);
-+ chip_mode = (reg & 0x0F);
-+ if((chip_mode==1)||(chip_mode==11)) {
-+ ra_or(NFC_CONF1, 1);
-+ is_nand_page_2048 = 1;
-+ nand_addrlen = ((chip_mode!=11) ? 4 : 5);
-+ printk("!!! nand page size = 2048, addr len=%d\n", nand_addrlen);
-+ }
-+ else {
-+ ra_and(NFC_CONF1, ~1);
-+ is_nand_page_2048 = 0;
-+ nand_addrlen = ((chip_mode!=10) ? 3 : 4);
-+ printk("!!! nand page size = 512, addr len=%d\n", nand_addrlen);
-+ }
-+#else
-+ is_nand_page_2048 = 0;
-+ nand_addrlen = 3;
-+ printk("!!! nand page size = 512, addr len=%d\n", nand_addrlen);
-+#endif
-+
-+#if defined (CONFIG_RALINK_RT6855A) || defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_RT6855)
-+ //config ECC location
-+ ra_and(NFC_CONF1, 0xfff000ff);
-+ ra_or(NFC_CONF1, ((CONFIG_ECC_OFFSET + 2) << 16) +
-+ ((CONFIG_ECC_OFFSET + 1) << 12) +
-+ (CONFIG_ECC_OFFSET << 8));
-+#endif
-+
-+#define ALIGNE_16(a) (((unsigned long)(a)+15) & ~15)
-+ buffers_size = ALIGNE_16((1<<CONFIG_PAGE_SIZE_BIT) + (1<<CONFIG_OOBSIZE_PER_PAGE_BIT)); //ra->buffers
-+ bbt_size = BBTTAG_BITS * (1<<(CONFIG_CHIP_SIZE_BIT - (CONFIG_PAGE_SIZE_BIT + CONFIG_NUMPAGE_PER_BLOCK_BIT))) / 8; //ra->bbt
-+ bbt_size = ALIGNE_16(bbt_size);
-+
-+ alloc_size = buffers_size + bbt_size;
-+ alloc_size += buffers_size; //for ra->readback_buffers
-+ alloc_size += sizeof(*ra);
-+ alloc_size += sizeof(*ranfc_mtd);
-+
-+ //make sure gpio-0 is input
-+ ra_outl(RALINK_PIO_BASE+0x24, ra_inl(RALINK_PIO_BASE+0x24) & ~0x01);
-+
-+ ra = (struct ra_nand_chip *)kzalloc(alloc_size, GFP_KERNEL | GFP_DMA);
-+ if (!ra) {
-+ printk("%s: mem alloc fail \n", __func__);
-+ return -ENOMEM;
-+ }
-+ memset(ra, 0, alloc_size);
-+
-+ //dynamic
-+ ra->buffers = (char *)((char *)ra + sizeof(*ra));
-+ ra->readback_buffers = ra->buffers + buffers_size;
-+ ra->bbt = ra->readback_buffers + buffers_size;
-+ ranfc_mtd = (struct mtd_info *)(ra->bbt + bbt_size);
-+
-+ //static
-+ ra->numchips = CONFIG_NUMCHIPS;
-+ ra->chip_shift = CONFIG_CHIP_SIZE_BIT;
-+ ra->page_shift = CONFIG_PAGE_SIZE_BIT;
-+ ra->oob_shift = CONFIG_OOBSIZE_PER_PAGE_BIT;
-+ ra->erase_shift = (CONFIG_PAGE_SIZE_BIT + CONFIG_NUMPAGE_PER_BLOCK_BIT);
-+ ra->badblockpos = CONFIG_BAD_BLOCK_POS;
-+ ra_oob_layout.eccpos[0] = CONFIG_ECC_OFFSET;
-+ ra_oob_layout.eccpos[1] = CONFIG_ECC_OFFSET + 1;
-+ ra_oob_layout.eccpos[2] = CONFIG_ECC_OFFSET + 2;
-+ ra->oob = &ra_oob_layout;
-+ ra->buffers_page = -1;
-+
-+#if defined (WORKAROUND_RX_BUF_OV)
-+ if (ranfc_verify) {
-+ ra->sandbox_page = nand_bbt_find_sandbox(ra);
-+ }
-+#endif
-+ ra_outl(NFC_CTRL, ra_inl(NFC_CTRL) | 0x01); //set wp to high
-+ nfc_all_reset();
-+
-+ ranfc_mtd->type = MTD_NANDFLASH;
-+ ranfc_mtd->flags = MTD_CAP_NANDFLASH;
-+ ranfc_mtd->size = CONFIG_NUMCHIPS * CFG_CHIPSIZE;
-+ ranfc_mtd->erasesize = CFG_BLOCKSIZE;
-+ ranfc_mtd->writesize = CFG_PAGESIZE;
-+ ranfc_mtd->oobsize = CFG_PAGE_OOBSIZE;
-+ ranfc_mtd->oobavail = RA_CHIP_OOB_AVAIL;
-+ ranfc_mtd->name = "ra_nfc";
-+ //ranfc_mtd->index
-+ ranfc_mtd->ecclayout = &ra_oob_layout;
-+ //ranfc_mtd->numberaseregions
-+ //ranfc_mtd->eraseregions
-+ //ranfc_mtd->bansize
-+ ranfc_mtd->_erase = ramtd_nand_erase;
-+ //ranfc_mtd->point
-+ //ranfc_mtd->unpoint
-+ ranfc_mtd->_read = ramtd_nand_read;
-+ ranfc_mtd->_write = ramtd_nand_write;
-+ ranfc_mtd->_read_oob = ramtd_nand_readoob;
-+ ranfc_mtd->_write_oob = ramtd_nand_writeoob;
-+ //ranfc_mtd->get_fact_prot_info; ranfc_mtd->read_fact_prot_reg;
-+ //ranfc_mtd->get_user_prot_info; ranfc_mtd->read_user_prot_reg;
-+ //ranfc_mtd->write_user_prot_reg; ranfc_mtd->lock_user_prot_reg;
-+ //ranfc_mtd->writev; ranfc_mtd->sync; ranfc_mtd->lock; ranfc_mtd->unlock; ranfc_mtd->suspend; ranfc_mtd->resume;
-+ ranfc_mtd->_block_isbad = ramtd_nand_block_isbad;
-+ ranfc_mtd->_block_markbad = ramtd_nand_block_markbad;
-+ //ranfc_mtd->reboot_notifier
-+ //ranfc_mtd->ecc_stats;
-+ // subpage_sht;
-+
-+ //ranfc_mtd->get_device; ranfc_mtd->put_device
-+ ranfc_mtd->priv = ra;
-+
-+ ranfc_mtd->owner = THIS_MODULE;
-+ ra->controller = &ra->hwcontrol;
-+ mutex_init(ra->controller);
-+
-+ printk("%s: alloc %x, at %p , btt(%p, %x), ranfc_mtd:%p\n",
-+ __func__ , alloc_size, ra, ra->bbt, bbt_size, ranfc_mtd);
-+
-+ ppdata.of_node = pdev->dev.of_node;
-+ err = mtd_device_parse_register(ranfc_mtd, mtk_probe_types,
-+ &ppdata, NULL, 0);
-+
-+ return err;
-+}
-+
-+static int
-+mtk_nand_remove(struct platform_device *pdev)
-+{
-+ struct ra_nand_chip *ra;
-+
-+ if (ranfc_mtd) {
-+ ra = (struct ra_nand_chip *)ranfc_mtd->priv;
-+
-+ /* Deregister partitions */
-+ //del_mtd_partitions(ranfc_mtd);
-+ kfree(ra);
-+ }
-+ return 0;
-+}
-+
-+static const struct of_device_id mtk_nand_match[] = {
-+ { .compatible = "mtk,mt7620-nand" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, mtk_nand_match);
-+
-+static struct platform_driver mtk_nand_driver = {
-+ .probe = mtk_nand_probe,
-+ .remove = mtk_nand_remove,
-+ .driver = {
-+ .name = "mt7620_nand",
-+ .owner = THIS_MODULE,
-+ .of_match_table = mtk_nand_match,
-+ },
-+};
-+
-+module_platform_driver(mtk_nand_driver);
-+
-+
-+MODULE_LICENSE("GPL");
---- /dev/null
-+++ b/drivers/mtd/maps/ralink_nand.h
-@@ -0,0 +1,232 @@
-+#ifndef RT2880_NAND_H
-+#define RT2880_NAND_H
-+
-+#include <linux/mtd/mtd.h>
-+
-+//#include "gdma.h"
-+
-+#define RALINK_SYSCTL_BASE 0xB0000000
-+#define RALINK_PIO_BASE 0xB0000600
-+#define RALINK_NAND_CTRL_BASE 0xB0000810
-+#define CONFIG_RALINK_MT7620
-+
-+#define SKIP_BAD_BLOCK
-+//#define RANDOM_GEN_BAD_BLOCK
-+
-+#define ra_inl(addr) (*(volatile unsigned int *)(addr))
-+#define ra_outl(addr, value) (*(volatile unsigned int *)(addr) = (value))
-+#define ra_aor(addr, a_mask, o_value) ra_outl(addr, (ra_inl(addr) & (a_mask)) | (o_value))
-+#define ra_and(addr, a_mask) ra_aor(addr, a_mask, 0)
-+#define ra_or(addr, o_value) ra_aor(addr, -1, o_value)
-+
-+
-+#define CONFIG_NUMCHIPS 1
-+#define CONFIG_NOT_SUPPORT_WP //rt3052 has no WP signal for chip.
-+//#define CONFIG_NOT_SUPPORT_RB
-+
-+extern int is_nand_page_2048;
-+extern const unsigned int nand_size_map[2][3];
-+
-+//chip
-+// chip geometry: SAMSUNG small size 32MB.
-+#define CONFIG_CHIP_SIZE_BIT (nand_size_map[is_nand_page_2048][nand_addrlen-3]) //! (1<<NAND_SIZE_BYTE) MB
-+//#define CONFIG_CHIP_SIZE_BIT (is_nand_page_2048? 29 : 25) //! (1<<NAND_SIZE_BYTE) MB
-+#define CONFIG_PAGE_SIZE_BIT (is_nand_page_2048? 11 : 9) //! (1<<PAGE_SIZE) MB
-+//#define CONFIG_SUBPAGE_BIT 1 //! these bits will be compensate by command cycle
-+#define CONFIG_NUMPAGE_PER_BLOCK_BIT (is_nand_page_2048? 6 : 5) //! order of number of pages a block.
-+#define CONFIG_OOBSIZE_PER_PAGE_BIT (is_nand_page_2048? 6 : 4) //! byte number of oob a page.
-+#define CONFIG_BAD_BLOCK_POS (is_nand_page_2048? 0 : 4) //! offset of byte to denote bad block.
-+#define CONFIG_ECC_BYTES 3 //! ecc has 3 bytes
-+#define CONFIG_ECC_OFFSET (is_nand_page_2048? 6 : 5) //! ecc starts from offset 5.
-+
-+//this section should not be modified.
-+//#define CFG_COLUMN_ADDR_MASK ((1 << (CONFIG_PAGE_SIZE_BIT - CONFIG_SUBPAGE_BIT)) - 1)
-+//#define CFG_COLUMN_ADDR_CYCLE (((CONFIG_PAGE_SIZE_BIT - CONFIG_SUBPAGE_BIT) + 7)/8)
-+//#define CFG_ROW_ADDR_CYCLE ((CONFIG_CHIP_SIZE_BIT - CONFIG_PAGE_SIZE_BIT + 7)/8)
-+//#define CFG_ADDR_CYCLE (CFG_COLUMN_ADDR_CYCLE + CFG_ROW_ADDR_CYCLE)
-+
-+#define CFG_COLUMN_ADDR_CYCLE (is_nand_page_2048? 2 : 1)
-+#define CFG_ROW_ADDR_CYCLE (nand_addrlen - CFG_COLUMN_ADDR_CYCLE)
-+#define CFG_ADDR_CYCLE (CFG_COLUMN_ADDR_CYCLE + CFG_ROW_ADDR_CYCLE)
-+
-+#define CFG_CHIPSIZE (1 << ((CONFIG_CHIP_SIZE_BIT>=32)? 31 : CONFIG_CHIP_SIZE_BIT))
-+//#define CFG_CHIPSIZE (1 << CONFIG_CHIP_SIZE_BIT)
-+#define CFG_PAGESIZE (1 << CONFIG_PAGE_SIZE_BIT)
-+#define CFG_BLOCKSIZE (CFG_PAGESIZE << CONFIG_NUMPAGE_PER_BLOCK_BIT)
-+#define CFG_NUMPAGE (1 << (CONFIG_CHIP_SIZE_BIT - CONFIG_PAGE_SIZE_BIT))
-+#define CFG_NUMBLOCK (CFG_NUMPAGE >> CONFIG_NUMPAGE_PER_BLOCK_BIT)
-+#define CFG_BLOCK_OOBSIZE (1 << (CONFIG_OOBSIZE_PER_PAGE_BIT + CONFIG_NUMPAGE_PER_BLOCK_BIT))
-+#define CFG_PAGE_OOBSIZE (1 << CONFIG_OOBSIZE_PER_PAGE_BIT)
-+
-+#define NAND_BLOCK_ALIGN(addr) ((addr) & (CFG_BLOCKSIZE-1))
-+#define NAND_PAGE_ALIGN(addr) ((addr) & (CFG_PAGESIZE-1))
-+
-+
-+#define NFC_BASE RALINK_NAND_CTRL_BASE
-+#define NFC_CTRL (NFC_BASE + 0x0)
-+#define NFC_CONF (NFC_BASE + 0x4)
-+#define NFC_CMD1 (NFC_BASE + 0x8)
-+#define NFC_CMD2 (NFC_BASE + 0xc)
-+#define NFC_CMD3 (NFC_BASE + 0x10)
-+#define NFC_ADDR (NFC_BASE + 0x14)
-+#define NFC_DATA (NFC_BASE + 0x18)
-+#if defined (CONFIG_RALINK_RT6855) || defined (CONFIG_RALINK_RT6855A) || \
-+ defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7621)
-+#define NFC_ECC (NFC_BASE + 0x30)
-+#else
-+#define NFC_ECC (NFC_BASE + 0x1c)
-+#endif
-+#define NFC_STATUS (NFC_BASE + 0x20)
-+#define NFC_INT_EN (NFC_BASE + 0x24)
-+#define NFC_INT_ST (NFC_BASE + 0x28)
-+#if defined (CONFIG_RALINK_RT6855) || defined (CONFIG_RALINK_RT6855A) || \
-+ defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7621)
-+#define NFC_CONF1 (NFC_BASE + 0x2c)
-+#define NFC_ECC_P1 (NFC_BASE + 0x30)
-+#define NFC_ECC_P2 (NFC_BASE + 0x34)
-+#define NFC_ECC_P3 (NFC_BASE + 0x38)
-+#define NFC_ECC_P4 (NFC_BASE + 0x3c)
-+#define NFC_ECC_ERR1 (NFC_BASE + 0x40)
-+#define NFC_ECC_ERR2 (NFC_BASE + 0x44)
-+#define NFC_ECC_ERR3 (NFC_BASE + 0x48)
-+#define NFC_ECC_ERR4 (NFC_BASE + 0x4c)
-+#define NFC_ADDR2 (NFC_BASE + 0x50)
-+#endif
-+
-+enum _int_stat {
-+ INT_ST_ND_DONE = 1<<0,
-+ INT_ST_TX_BUF_RDY = 1<<1,
-+ INT_ST_RX_BUF_RDY = 1<<2,
-+ INT_ST_ECC_ERR = 1<<3,
-+ INT_ST_TX_TRAS_ERR = 1<<4,
-+ INT_ST_RX_TRAS_ERR = 1<<5,
-+ INT_ST_TX_KICK_ERR = 1<<6,
-+ INT_ST_RX_KICK_ERR = 1<<7
-+};
-+
-+
-+//#define WORKAROUND_RX_BUF_OV 1
-+
-+
-+/*************************************************************
-+ * stolen from nand.h
-+ *************************************************************/
-+
-+/*
-+ * Standard NAND flash commands
-+ */
-+#define NAND_CMD_READ0 0
-+#define NAND_CMD_READ1 1
-+#define NAND_CMD_RNDOUT 5
-+#define NAND_CMD_PAGEPROG 0x10
-+#define NAND_CMD_READOOB 0x50
-+#define NAND_CMD_ERASE1 0x60
-+#define NAND_CMD_STATUS 0x70
-+#define NAND_CMD_STATUS_MULTI 0x71
-+#define NAND_CMD_SEQIN 0x80
-+#define NAND_CMD_RNDIN 0x85
-+#define NAND_CMD_READID 0x90
-+#define NAND_CMD_ERASE2 0xd0
-+#define NAND_CMD_RESET 0xff
-+
-+/* Extended commands for large page devices */
-+#define NAND_CMD_READSTART 0x30
-+#define NAND_CMD_RNDOUTSTART 0xE0
-+#define NAND_CMD_CACHEDPROG 0x15
-+
-+/* Extended commands for AG-AND device */
-+/*
-+ * Note: the command for NAND_CMD_DEPLETE1 is really 0x00 but
-+ * there is no way to distinguish that from NAND_CMD_READ0
-+ * until the remaining sequence of commands has been completed
-+ * so add a high order bit and mask it off in the command.
-+ */
-+#define NAND_CMD_DEPLETE1 0x100
-+#define NAND_CMD_DEPLETE2 0x38
-+#define NAND_CMD_STATUS_MULTI 0x71
-+#define NAND_CMD_STATUS_ERROR 0x72
-+/* multi-bank error status (banks 0-3) */
-+#define NAND_CMD_STATUS_ERROR0 0x73
-+#define NAND_CMD_STATUS_ERROR1 0x74
-+#define NAND_CMD_STATUS_ERROR2 0x75
-+#define NAND_CMD_STATUS_ERROR3 0x76
-+#define NAND_CMD_STATUS_RESET 0x7f
-+#define NAND_CMD_STATUS_CLEAR 0xff
-+
-+#define NAND_CMD_NONE -1
-+
-+/* Status bits */
-+#define NAND_STATUS_FAIL 0x01
-+#define NAND_STATUS_FAIL_N1 0x02
-+#define NAND_STATUS_TRUE_READY 0x20
-+#define NAND_STATUS_READY 0x40
-+#define NAND_STATUS_WP 0x80
-+
-+typedef enum {
-+ FL_READY,
-+ FL_READING,
-+ FL_WRITING,
-+ FL_ERASING,
-+ FL_SYNCING,
-+ FL_CACHEDPRG,
-+ FL_PM_SUSPENDED,
-+} nand_state_t;
-+
-+/*************************************************************/
-+
-+
-+
-+typedef enum _ra_flags {
-+ FLAG_NONE = 0,
-+ FLAG_ECC_EN = (1<<0),
-+ FLAG_USE_GDMA = (1<<1),
-+ FLAG_VERIFY = (1<<2),
-+} RA_FLAGS;
-+
-+
-+#define BBTTAG_BITS 2
-+#define BBTTAG_BITS_MASK ((1<<BBTTAG_BITS) -1)
-+enum BBT_TAG {
-+ BBT_TAG_UNKNOWN = 0, //2'b01
-+ BBT_TAG_GOOD = 3, //2'b11
-+ BBT_TAG_BAD = 2, //2'b10
-+ BBT_TAG_RES = 1, //2'b01
-+};
-+
-+struct ra_nand_chip {
-+ int numchips;
-+ int chip_shift;
-+ int page_shift;
-+ int erase_shift;
-+ int oob_shift;
-+ int badblockpos;
-+#if !defined (__UBOOT__)
-+ struct mutex hwcontrol;
-+ struct mutex *controller;
-+#endif
-+ struct nand_ecclayout *oob;
-+ int state;
-+ unsigned int buffers_page;
-+ char *buffers; //[CFG_PAGESIZE + CFG_PAGE_OOBSIZE];
-+ char *readback_buffers;
-+ unsigned char *bbt;
-+#if defined (WORKAROUND_RX_BUF_OV)
-+ unsigned int sandbox_page; // steal a page (block) for read ECC verification
-+#endif
-+
-+};
-+
-+
-+
-+//fixme, gdma api
-+int nand_dma_sync(void);
-+void release_dma_buf(void);
-+int set_gdma_ch(unsigned long dst,
-+ unsigned long src, unsigned int len, int burst_size,
-+ int soft_mode, int src_req_type, int dst_req_type,
-+ int src_burst_mode, int dst_burst_mode);
-+
-+
-+
-+
-+#endif
projects / openwrt.git / blobdiff