mxc_nand: Add v3 (i.MX51) Support
Linux-MTD Mailing List
linux-mtd at lists.infradead.org
Fri Aug 6 12:01:43 EDT 2010
Gitweb: http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=71ec51554a2c22ff03c7aac6866cdf395099994d
Commit: 71ec51554a2c22ff03c7aac6866cdf395099994d
Parent: 6e85dfdc19ef526edec285aed47c83934882e9bd
Author: Sascha Hauer <s.hauer at pengutronix.de>
AuthorDate: Fri Aug 6 15:53:11 2010 +0200
Committer: David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Fri Aug 6 16:38:09 2010 +0100
mxc_nand: Add v3 (i.MX51) Support
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
drivers/mtd/nand/Kconfig | 2 +-
drivers/mtd/nand/mxc_nand.c | 222 ++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 222 insertions(+), 2 deletions(-)
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 1d69920..79afdc1 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -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.
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 1433a83..3657a6e 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -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)
@@ -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;
@@ -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;
@@ -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;
@@ -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)
@@ -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. */
@@ -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;
@@ -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)
{
@@ -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)
@@ -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;
@@ -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,
@@ -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();
@@ -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);
@@ -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);
More information about the linux-mtd-cvs
mailing list