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mxc_nand: Add v3 (i.MX51) Support
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Sascha Hauer authored and David Woodhouse committed Aug 6, 2010
1 parent 6e85dfd commit 71ec515
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Showing 2 changed files with 222 additions and 2 deletions.
2 changes: 1 addition & 1 deletion drivers/mtd/nand/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -481,7 +481,7 @@ config MTD_NAND_MPC5121_NFC

config MTD_NAND_MXC
tristate "MXC NAND support"
depends on ARCH_MX2 || ARCH_MX25 || ARCH_MX3
depends on ARCH_MX2 || ARCH_MX25 || ARCH_MX3 || ARCH_MX51
help
This enables the driver for the NAND flash controller on the
MXC processors.
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222 changes: 221 additions & 1 deletion drivers/mtd/nand/mxc_nand.c
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,8 @@

#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35())
#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
#define nfc_is_v3_2() cpu_is_mx51()
#define nfc_is_v3() nfc_is_v3_2()

/* Addresses for NFC registers */
#define NFC_V1_V2_BUF_SIZE (host->regs + 0x00)
Expand Down Expand Up @@ -80,6 +82,54 @@
#define NFC_ID (1 << 4)
#define NFC_STATUS (1 << 5)

#define NFC_V3_FLASH_CMD (host->regs_axi + 0x00)
#define NFC_V3_FLASH_ADDR0 (host->regs_axi + 0x04)

#define NFC_V3_CONFIG1 (host->regs_axi + 0x34)
#define NFC_V3_CONFIG1_SP_EN (1 << 0)
#define NFC_V3_CONFIG1_RBA(x) (((x) & 0x7 ) << 4)

#define NFC_V3_ECC_STATUS_RESULT (host->regs_axi + 0x38)

#define NFC_V3_LAUNCH (host->regs_axi + 0x40)

#define NFC_V3_WRPROT (host->regs_ip + 0x0)
#define NFC_V3_WRPROT_LOCK_TIGHT (1 << 0)
#define NFC_V3_WRPROT_LOCK (1 << 1)
#define NFC_V3_WRPROT_UNLOCK (1 << 2)
#define NFC_V3_WRPROT_BLS_UNLOCK (2 << 6)

#define NFC_V3_WRPROT_UNLOCK_BLK_ADD0 (host->regs_ip + 0x04)

#define NFC_V3_CONFIG2 (host->regs_ip + 0x24)
#define NFC_V3_CONFIG2_PS_512 (0 << 0)
#define NFC_V3_CONFIG2_PS_2048 (1 << 0)
#define NFC_V3_CONFIG2_PS_4096 (2 << 0)
#define NFC_V3_CONFIG2_ONE_CYCLE (1 << 2)
#define NFC_V3_CONFIG2_ECC_EN (1 << 3)
#define NFC_V3_CONFIG2_2CMD_PHASES (1 << 4)
#define NFC_V3_CONFIG2_NUM_ADDR_PHASE0 (1 << 5)
#define NFC_V3_CONFIG2_ECC_MODE_8 (1 << 6)
#define NFC_V3_CONFIG2_PPB(x) (((x) & 0x3) << 7)
#define NFC_V3_CONFIG2_NUM_ADDR_PHASE1(x) (((x) & 0x3) << 12)
#define NFC_V3_CONFIG2_INT_MSK (1 << 15)
#define NFC_V3_CONFIG2_ST_CMD(x) (((x) & 0xff) << 24)
#define NFC_V3_CONFIG2_SPAS(x) (((x) & 0xff) << 16)

#define NFC_V3_CONFIG3 (host->regs_ip + 0x28)
#define NFC_V3_CONFIG3_ADD_OP(x) (((x) & 0x3) << 0)
#define NFC_V3_CONFIG3_FW8 (1 << 3)
#define NFC_V3_CONFIG3_SBB(x) (((x) & 0x7) << 8)
#define NFC_V3_CONFIG3_NUM_OF_DEVICES(x) (((x) & 0x7) << 12)
#define NFC_V3_CONFIG3_RBB_MODE (1 << 15)
#define NFC_V3_CONFIG3_NO_SDMA (1 << 20)

#define NFC_V3_IPC (host->regs_ip + 0x2C)
#define NFC_V3_IPC_CREQ (1 << 0)
#define NFC_V3_IPC_INT (1 << 31)

#define NFC_V3_DELAY_LINE (host->regs_ip + 0x34)

struct mxc_nand_host {
struct mtd_info mtd;
struct nand_chip nand;
Expand All @@ -91,6 +141,8 @@ struct mxc_nand_host {

void __iomem *base;
void __iomem *regs;
void __iomem *regs_axi;
void __iomem *regs_ip;
int status_request;
struct clk *clk;
int clk_act;
Expand Down Expand Up @@ -169,6 +221,20 @@ static irqreturn_t mxc_nfc_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}

static int check_int_v3(struct mxc_nand_host *host)
{
uint32_t tmp;

tmp = readl(NFC_V3_IPC);
if (!(tmp & NFC_V3_IPC_INT))
return 0;

tmp &= ~NFC_V3_IPC_INT;
writel(tmp, NFC_V3_IPC);

return 1;
}

static int check_int_v1_v2(struct mxc_nand_host *host)
{
uint32_t tmp;
Expand Down Expand Up @@ -209,6 +275,18 @@ static void wait_op_done(struct mxc_nand_host *host, int useirq)
}
}

static void send_cmd_v3(struct mxc_nand_host *host, uint16_t cmd, int useirq)
{
/* fill command */
writel(cmd, NFC_V3_FLASH_CMD);

/* send out command */
writel(NFC_CMD, NFC_V3_LAUNCH);

/* Wait for operation to complete */
wait_op_done(host, useirq);
}

/* This function issues the specified command to the NAND device and
* waits for completion. */
static void send_cmd_v1_v2(struct mxc_nand_host *host, uint16_t cmd, int useirq)
Expand Down Expand Up @@ -237,6 +315,17 @@ static void send_cmd_v1_v2(struct mxc_nand_host *host, uint16_t cmd, int useirq)
}
}

static void send_addr_v3(struct mxc_nand_host *host, uint16_t addr, int islast)
{
/* fill address */
writel(addr, NFC_V3_FLASH_ADDR0);

/* send out address */
writel(NFC_ADDR, NFC_V3_LAUNCH);

wait_op_done(host, 0);
}

/* This function sends an address (or partial address) to the
* NAND device. The address is used to select the source/destination for
* a NAND command. */
Expand All @@ -251,6 +340,22 @@ static void send_addr_v1_v2(struct mxc_nand_host *host, uint16_t addr, int islas
wait_op_done(host, islast);
}

static void send_page_v3(struct mtd_info *mtd, unsigned int ops)
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
uint32_t tmp;

tmp = readl(NFC_V3_CONFIG1);
tmp &= ~(7 << 4);
writel(tmp, NFC_V3_CONFIG1);

/* transfer data from NFC ram to nand */
writel(ops, NFC_V3_LAUNCH);

wait_op_done(host, false);
}

static void send_page_v1_v2(struct mtd_info *mtd, unsigned int ops)
{
struct nand_chip *nand_chip = mtd->priv;
Expand All @@ -274,6 +379,16 @@ static void send_page_v1_v2(struct mtd_info *mtd, unsigned int ops)
}
}

static void send_read_id_v3(struct mxc_nand_host *host)
{
/* Read ID into main buffer */
writel(NFC_ID, NFC_V3_LAUNCH);

wait_op_done(host, true);

memcpy(host->data_buf, host->main_area0, 16);
}

/* Request the NANDFC to perform a read of the NAND device ID. */
static void send_read_id_v1_v2(struct mxc_nand_host *host)
{
Expand All @@ -299,6 +414,14 @@ static void send_read_id_v1_v2(struct mxc_nand_host *host)
memcpy(host->data_buf, host->main_area0, 16);
}

static uint16_t get_dev_status_v3(struct mxc_nand_host *host)
{
writew(NFC_STATUS, NFC_V3_LAUNCH);
wait_op_done(host, true);

return readl(NFC_V3_CONFIG1) >> 16;
}

/* This function requests the NANDFC to perform a read of the
* NAND device status and returns the current status. */
static uint16_t get_dev_status_v1_v2(struct mxc_nand_host *host)
Expand Down Expand Up @@ -381,7 +504,10 @@ static int mxc_nand_correct_data_v2_v3(struct mtd_info *mtd, u_char *dat,

no_subpages = mtd->writesize >> 9;

ecc_stat = readl(NFC_V1_V2_ECC_STATUS_RESULT);
if (nfc_is_v21())
ecc_stat = readl(NFC_V1_V2_ECC_STATUS_RESULT);
else
ecc_stat = readl(NFC_V3_ECC_STATUS_RESULT);

do {
err = ecc_stat & ecc_bit_mask;
Expand Down Expand Up @@ -643,6 +769,72 @@ static void preset_v1_v2(struct mtd_info *mtd)
writew(0x4, NFC_V1_V2_WRPROT);
}

static void preset_v3(struct mtd_info *mtd)
{
struct nand_chip *chip = mtd->priv;
struct mxc_nand_host *host = chip->priv;
uint32_t config2, config3;
int i, addr_phases;

writel(NFC_V3_CONFIG1_RBA(0), NFC_V3_CONFIG1);
writel(NFC_V3_IPC_CREQ, NFC_V3_IPC);

/* Unlock the internal RAM Buffer */
writel(NFC_V3_WRPROT_BLS_UNLOCK | NFC_V3_WRPROT_UNLOCK,
NFC_V3_WRPROT);

/* Blocks to be unlocked */
for (i = 0; i < NAND_MAX_CHIPS; i++)
writel(0x0 | (0xffff << 16),
NFC_V3_WRPROT_UNLOCK_BLK_ADD0 + (i << 2));

writel(0, NFC_V3_IPC);

config2 = NFC_V3_CONFIG2_ONE_CYCLE |
NFC_V3_CONFIG2_2CMD_PHASES |
NFC_V3_CONFIG2_SPAS(mtd->oobsize >> 1) |
NFC_V3_CONFIG2_ST_CMD(0x70) |
NFC_V3_CONFIG2_NUM_ADDR_PHASE0;

if (chip->ecc.mode == NAND_ECC_HW)
config2 |= NFC_V3_CONFIG2_ECC_EN;

addr_phases = fls(chip->pagemask) >> 3;

if (mtd->writesize == 2048) {
config2 |= NFC_V3_CONFIG2_PS_2048;
config2 |= NFC_V3_CONFIG2_NUM_ADDR_PHASE1(addr_phases);
} else if (mtd->writesize == 4096) {
config2 |= NFC_V3_CONFIG2_PS_4096;
config2 |= NFC_V3_CONFIG2_NUM_ADDR_PHASE1(addr_phases);
} else {
config2 |= NFC_V3_CONFIG2_PS_512;
config2 |= NFC_V3_CONFIG2_NUM_ADDR_PHASE1(addr_phases - 1);
}

if (mtd->writesize) {
config2 |= NFC_V3_CONFIG2_PPB(ffs(mtd->erasesize / mtd->writesize) - 6);
host->eccsize = get_eccsize(mtd);
if (host->eccsize == 8)
config2 |= NFC_V3_CONFIG2_ECC_MODE_8;
}

writel(config2, NFC_V3_CONFIG2);

config3 = NFC_V3_CONFIG3_NUM_OF_DEVICES(0) |
NFC_V3_CONFIG3_NO_SDMA |
NFC_V3_CONFIG3_RBB_MODE |
NFC_V3_CONFIG3_SBB(6) | /* Reset default */
NFC_V3_CONFIG3_ADD_OP(0);

if (!(chip->options & NAND_BUSWIDTH_16))
config3 |= NFC_V3_CONFIG3_FW8;

writel(config3, NFC_V3_CONFIG3);

writel(0, NFC_V3_DELAY_LINE);
}

/* Used by the upper layer to write command to NAND Flash for
* different operations to be carried out on NAND Flash */
static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
Expand Down Expand Up @@ -843,6 +1035,30 @@ static int __init mxcnd_probe(struct platform_device *pdev)
oob_smallpage = &nandv1_hw_eccoob_smallpage;
oob_largepage = &nandv1_hw_eccoob_largepage;
this->ecc.bytes = 3;
host->eccsize = 1;
} else if (nfc_is_v3_2()) {
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res) {
err = -ENODEV;
goto eirq;
}
host->regs_ip = ioremap(res->start, resource_size(res));
if (!host->regs_ip) {
err = -ENOMEM;
goto eirq;
}
host->regs_axi = host->base + 0x1e00;
host->spare0 = host->base + 0x1000;
host->spare_len = 64;
host->preset = preset_v3;
host->send_cmd = send_cmd_v3;
host->send_addr = send_addr_v3;
host->send_page = send_page_v3;
host->send_read_id = send_read_id_v3;
host->check_int = check_int_v3;
host->get_dev_status = get_dev_status_v3;
oob_smallpage = &nandv2_hw_eccoob_smallpage;
oob_largepage = &nandv2_hw_eccoob_largepage;
} else
BUG();

Expand Down Expand Up @@ -918,6 +1134,8 @@ static int __init mxcnd_probe(struct platform_device *pdev)
escan:
free_irq(host->irq, host);
eirq:
if (host->regs_ip)
iounmap(host->regs_ip);
iounmap(host->base);
eres:
clk_put(host->clk);
Expand All @@ -937,6 +1155,8 @@ static int __devexit mxcnd_remove(struct platform_device *pdev)

nand_release(&host->mtd);
free_irq(host->irq, host);
if (host->regs_ip)
iounmap(host->regs_ip);
iounmap(host->base);
kfree(host);

Expand Down

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