#include <string.h> /* memcpy() */
+// Timeout for NAND operations in ms
+#define MT29F_TMOUT 100
+
+// NAND flash status codes
+#define MT29F_STATUS_READY BV(6)
+#define MT29F_STATUS_ERROR BV(0)
+
+// NAND flash commands
+#define MT29F_CMD_READ_1 0x00
+#define MT29F_CMD_READ_2 0x30
+#define MT29F_CMD_COPYBACK_READ_1 0x00
+#define MT29F_CMD_COPYBACK_READ_2 0x35
+#define MT29F_CMD_COPYBACK_PROGRAM_1 0x85
+#define MT29F_CMD_COPYBACK_PROGRAM_2 0x10
+#define MT29F_CMD_RANDOM_OUT 0x05
+#define MT29F_CMD_RANDOM_OUT_2 0xE0
+#define MT29F_CMD_RANDOM_IN 0x85
+#define MT29F_CMD_READID 0x90
+#define MT29F_CMD_WRITE_1 0x80
+#define MT29F_CMD_WRITE_2 0x10
+#define MT29F_CMD_ERASE_1 0x60
+#define MT29F_CMD_ERASE_2 0xD0
+#define MT29F_CMD_STATUS 0x70
+#define MT29F_CMD_RESET 0xFF
+
+// Addresses for sending command, addresses and data bytes to flash
+#define MT29F_CMD_ADDR 0x60400000
+#define MT29F_ADDR_ADDR 0x60200000
+#define MT29F_DATA_ADDR 0x60000000
+
struct Mt29fHardware
{
- int boh;
+ uint8_t status;
};
+/*
+ * Translate flash page index plus a byte offset
+ * in the five address cycles format needed by NAND.
+ *
+ * Cycles in x8 mode as the MT29F2G08AAD
+ * CA = column addr, PA = page addr, BA = block addr
+ *
+ * Cycle I/O7 I/O6 I/O5 I/O4 I/O3 I/O2 I/O1 I/O0
+ * -------------------------------------------------------
+ * First CA7 CA6 CA5 CA4 CA3 CA2 CA1 CA0
+ * Second LOW LOW LOW LOW CA11 CA10 CA9 CA8
+ * Third BA7 BA6 PA5 PA4 PA3 PA2 PA1 PA0
+ * Fourth BA15 BA14 BA13 BA12 BA11 BA10 BA9 BA8
+ * Fifth LOW LOW LOW LOW LOW LOW LOW BA16
+ */
+static void mt29f_getAddrCycles(block_idx_t page, size_t offset, uint32_t *cycle0, uint32_t *cycle1234)
+{
+ ASSERT(offset < MT29F_PAGE_SIZE);
+
+ *cycle0 = offset & 0xff;
+ *cycle1234 = (page << 8) | ((offset >> 8) & 0xf);
+
+ LOG_INFO("mt29f addr: %lx %lx\n", *cycle1234, *cycle0);
+}
+
+
+INLINE bool mt29f_isBusy(void)
+{
+ return HWREG(NFC_CMD_BASE_ADDR + NFC_CMD_NFCCMD) & 0x8000000;
+}
+
+INLINE bool mt29f_isCmdDone(void)
+{
+ return SMC_SR & SMC_SR_CMDDONE;
+}
+
+static bool mt29f_waitReadyBusy(void)
+{
+ time_t start = timer_clock();
+
+ while (!(SMC_SR & SMC_SR_RB_EDGE0))
+ {
+ cpu_relax();
+ if (timer_clock() - start > MT29F_TMOUT)
+ {
+ LOG_INFO("mt29f: R/B timeout\n");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/*
+ * Wait for transfer to complete until timeout.
+ * If transfer completes return true, false in case of timeout.
+ */
+static bool mt29f_waitTransferComplete(void)
+{
+ time_t start = timer_clock();
+
+ while (!(SMC_SR & SMC_SR_XFRDONE))
+ {
+ cpu_relax();
+ if (timer_clock() - start > MT29F_TMOUT)
+ {
+ LOG_INFO("mt29f: xfer complete timeout\n");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+
+/*
+ * Send command to NAND and wait for completion.
+ */
+static void mt29f_sendCommand(uint32_t cmd,
+ int num_cycles, uint32_t cycle0, uint32_t cycle1234)
+{
+ reg32_t *cmd_addr;
+
+ while (mt29f_isBusy());
+
+ if (num_cycles == 5)
+ SMC_ADDR = cycle0;
+
+ cmd_addr = (reg32_t *)(NFC_CMD_BASE_ADDR + cmd);
+ *cmd_addr = cycle1234;
+
+ while (!mt29f_isCmdDone());
+}
+
+
+static bool mt29f_isOperationComplete(void)
+{
+ uint8_t status;
+
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | MT29F_CSID | NFC_CMD_ACYCLE_NONE |
+ MT29F_CMD_STATUS << 2,
+ 0, 0, 0);
+
+ status = (uint8_t)HWREG(MT29F_DATA_ADDR);
+ return (status & MT29F_STATUS_READY) && !(status & MT29F_STATUS_ERROR);
+}
+
+
+static void mt29f_reset(void)
+{
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | MT29F_CSID | NFC_CMD_ACYCLE_NONE |
+ MT29F_CMD_RESET << 2,
+ 0, 0, 0);
+
+ mt29f_waitReadyBusy();
+}
+
+
+/**
+ * Erase the whole block containing given page.
+ */
+int mt29f_blockErase(Mt29f *fls, block_idx_t page)
+{
+ uint32_t cycle0;
+ uint32_t cycle1234;
+
+ mt29f_getAddrCycles(page, 0, &cycle0, &cycle1234);
+
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | MT29F_CSID | NFC_CMD_ACYCLE_THREE | NFC_CMD_VCMD2 |
+ (MT29F_CMD_ERASE_2 << 10) | (MT29F_CMD_ERASE_1 << 2),
+ 3, 0, cycle1234 >> 8);
+
+ mt29f_waitReadyBusy();
+
+ if (!mt29f_isOperationComplete())
+ {
+ LOG_ERR("mt29f: error erasing block\n");
+ fls->hw->status |= MT29F_ERR_ERASE;
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/**
+ * Read Device ID and configuration codes.
+ */
+bool mt29f_getDevId(Mt29f *fls, uint8_t dev_id[5])
+{
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | NFC_CMD_NFCEN | MT29F_CSID | NFC_CMD_ACYCLE_ONE |
+ MT29F_CMD_READID << 2,
+ 1, 0, 0);
+
+ mt29f_waitReadyBusy();
+ if (!mt29f_waitTransferComplete())
+ {
+ LOG_ERR("mt29f: getDevId timeout\n");
+ fls->hw->status |= MT29F_ERR_RD_TMOUT;
+ return false;
+ }
+
+ memcpy(dev_id, (void *)NFC_SRAM_BASE_ADDR, 5);
+ return true;
+}
+
+
static size_t mt29f_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
{
+ Mt29f *fls = FLASH_CAST(blk);
+ uint32_t cycle0;
+ uint32_t cycle1234;
+
+ ASSERT(offset == 0);
+ ASSERT(size == blk->blk_size);
+
+ LOG_INFO("mt29f_readDirect\n");
+
+ mt29f_getAddrCycles(idx, 0, &cycle0, &cycle1234);
+
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | NFC_CMD_NFCEN | MT29F_CSID | NFC_CMD_ACYCLE_FIVE | NFC_CMD_VCMD2 |
+ (MT29F_CMD_READ_2 << 10) | (MT29F_CMD_READ_1 << 2),
+ 5, cycle0, cycle1234);
+
+ mt29f_waitReadyBusy();
+ if (!mt29f_waitTransferComplete())
+ {
+ LOG_ERR("mt29f: read timeout\n");
+ fls->hw->status |= MT29F_ERR_RD_TMOUT;
+ return 0;
+ }
+
+ if (!kblock_buffered(blk) && (buf != (void *)NFC_SRAM_BASE_ADDR))
+ memcpy(buf, (void *)NFC_SRAM_BASE_ADDR, size);
+
+ return size;
}
static size_t mt29f_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
{
+ Mt29f *fls = FLASH_CAST(blk);
+ uint32_t cycle0;
+ uint32_t cycle1234;
+
+ ASSERT(offset == 0);
+ ASSERT(size == blk->blk_size);
+
+ LOG_INFO("mt29f_writeDirect\n");
+
+ if (!kblock_buffered(blk) && (_buf != (void *)NFC_SRAM_BASE_ADDR))
+ memcpy((void *)NFC_SRAM_BASE_ADDR, _buf, size);
+
+ mt29f_getAddrCycles(idx, 0, &cycle0, &cycle1234);
+
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | NFC_CMD_NFCWR | NFC_CMD_NFCEN | MT29F_CSID | NFC_CMD_ACYCLE_FIVE |
+ MT29F_CMD_WRITE_1 << 2,
+ 5, cycle0, cycle1234);
+
+ if (!mt29f_waitTransferComplete())
+ {
+ LOG_ERR("mt29f: write timeout\n");
+ fls->hw->status |= MT29F_ERR_WR_TMOUT;
+ return 0;
+ }
+
+ mt29f_sendCommand(
+ NFC_CMD_NFCCMD | MT29F_CSID | NFC_CMD_ACYCLE_NONE |
+ MT29F_CMD_WRITE_2 << 2,
+ 0, 0, 0);
+
+ mt29f_waitReadyBusy();
+
+ if (!mt29f_isOperationComplete())
+ {
+ LOG_ERR("mt29f: error writing page\n");
+ fls->hw->status |= MT29F_ERR_WRITE;
+ return 0;
+ }
+
+ return size;
}
static int mt29f_error(struct KBlock *blk)
{
Mt29f *fls = FLASH_CAST(blk);
+ return fls->hw->status;
}
static void mt29f_clearerror(struct KBlock *blk)
{
Mt29f *fls = FLASH_CAST(blk);
+ fls->hw->status = 0;
}
static struct Mt29fHardware mt29f_hw;
-static uint8_t kblock_buf[MT29F_PAGE_SIZE];
static void common_init(Mt29f *fls)
fls->blk.blk_size = MT29F_PAGE_SIZE;
fls->blk.blk_cnt = MT29F_SIZE / MT29F_PAGE_SIZE;
- // TODO: put following stuff in hw_ file dependent (and configurable cs?)
+ /*
+ * TODO: put following stuff in hw_ file dependent (and configurable cs?)
+ * Parameters for MT29F8G08AAD
+ */
pmc_periphEnable(PIOA_ID);
pmc_periphEnable(PIOC_ID);
pmc_periphEnable(PIOD_ID);
SMC_MODE0 = SMC_MODE_READ_MODE
| SMC_MODE_WRITE_MODE;
+ SMC_CFG = SMC_CFG_PAGESIZE_PS2048_64
+ | SMC_CFG_EDGECTRL
+ | SMC_CFG_DTOMUL_X1048576
+ | SMC_CFG_DTOCYC(0xF);
+
+ // Disable SMC interrupts, reset and enable NFC controller
+ SMC_IDR = ~0;
+ SMC_CTRL = 0;
+ SMC_CTRL = SMC_CTRL_NFCEN;
+ mt29f_reset();
}
-void mt29f_hw_init(Mt29f *fls, int flags)
+void mt29f_init(Mt29f *fls)
{
common_init(fls);
fls->blk.priv.vt = &mt29f_buffered_vt;
- fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE;
- fls->blk.priv.buf = kblock_buf;
+ fls->blk.priv.flags |= KB_BUFFERED;
+ fls->blk.priv.buf = (void *)NFC_SRAM_BASE_ADDR;
// Load the first block in the cache
- void *start = 0x0;
- memcpy(fls->blk.priv.buf, start, fls->blk.blk_size);
+ mt29f_readDirect(&fls->blk, 0, (void *)NFC_SRAM_BASE_ADDR, 0, MT29F_PAGE_SIZE);
}
-void mt29f_hw_initUnbuffered(Mt29f *fls, int flags)
+void mt29f_initUnbuffered(Mt29f *fls)
{
common_init(fls);
fls->blk.priv.vt = &mt29f_unbuffered_vt;
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