[PATCH 3/3] nand_imx: update to support onfi & 4k flashs
Eric Bénard
eric at eukrea.com
Thu Jul 5 06:22:47 EDT 2012
- add CMD_PARAM and read_param to get the ONFI structure
- fix OOB size for flash with 224 OOB on i.MX51/3
- add the same ecc layout as the one in the kernel for
4k page flashs
Tested on an i.MX53.
Signed-off-by: Eric Bénard <eric at eukrea.com>
---
drivers/mtd/nand/nand_imx.c | 98 ++++++++++++++++++++++++++++++++++++++++--
1 files changed, 93 insertions(+), 5 deletions(-)
diff --git a/drivers/mtd/nand/nand_imx.c b/drivers/mtd/nand/nand_imx.c
index e75ffbc..83b49e3 100644
--- a/drivers/mtd/nand/nand_imx.c
+++ b/drivers/mtd/nand/nand_imx.c
@@ -106,6 +106,7 @@ struct imx_nand_host {
void (*send_addr)(struct imx_nand_host *, uint16_t);
void (*send_page)(struct imx_nand_host *, unsigned int);
void (*send_read_id)(struct imx_nand_host *);
+ void (*send_read_param)(struct imx_nand_host *);
uint16_t (*get_dev_status)(struct imx_nand_host *);
int (*check_int)(struct imx_nand_host *);
};
@@ -154,6 +155,31 @@ static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
}
};
+/* OOB description for 4096 byte pages with 128 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_4k = {
+ .eccbytes = 8 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 23, 24, 25, 26, 27, 28, 29, 30, 31,
+ 39, 40, 41, 42, 43, 44, 45, 46, 47,
+ 55, 56, 57, 58, 59, 60, 61, 62, 63,
+ 71, 72, 73, 74, 75, 76, 77, 78, 79,
+ 87, 88, 89, 90, 91, 92, 93, 94, 95,
+ 103, 104, 105, 106, 107, 108, 109, 110, 111,
+ 119, 120, 121, 122, 123, 124, 125, 126, 127,
+ },
+ .oobfree = {
+ {.offset = 2, .length = 4},
+ {.offset = 16, .length = 7},
+ {.offset = 32, .length = 7},
+ {.offset = 48, .length = 7},
+ {.offset = 64, .length = 7},
+ {.offset = 80, .length = 7},
+ {.offset = 96, .length = 7},
+ {.offset = 112, .length = 7},
+ }
+};
+
static void memcpy32(void *trg, const void *src, int size)
{
int i;
@@ -335,6 +361,16 @@ static void send_read_id_v3(struct imx_nand_host *host)
memcpy(host->data_buf, host->main_area0, 16);
}
+static void send_read_param_v3(struct imx_nand_host *host)
+{
+ /* Read ID into main buffer */
+ writel(NFC_OUTPUT, NFC_V3_LAUNCH);
+
+ wait_op_done(host);
+
+ memcpy(host->data_buf, host->main_area0, 1024);
+}
+
static void send_read_id_v1_v2(struct imx_nand_host *host)
{
struct nand_chip *this = &host->nand;
@@ -363,6 +399,34 @@ static void send_read_id_v1_v2(struct imx_nand_host *host)
memcpy32(host->data_buf, host->main_area0, 16);
}
+/* FIXME : to check on real HW */
+static void send_read_param_v1_v2(struct imx_nand_host *host)
+{
+ struct nand_chip *this = &host->nand;
+
+ /* NANDFC buffer 0 is used for device ID output */
+ writew(0x0, host->regs + NFC_V1_V2_BUF_ADDR);
+
+ writew(NFC_OUTPUT, host->regs + NFC_V1_V2_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host);
+
+ if (this->options & NAND_BUSWIDTH_16) {
+ volatile u16 *mainbuf = host->main_area0;
+
+ /*
+ * Pack the every-other-byte result for 16-bit ID reads
+ * into every-byte as the generic code expects and various
+ * chips implement.
+ */
+
+ mainbuf[0] = (mainbuf[0] & 0xff) | ((mainbuf[1] & 0xff) << 8);
+ mainbuf[1] = (mainbuf[2] & 0xff) | ((mainbuf[3] & 0xff) << 8);
+ mainbuf[2] = (mainbuf[4] & 0xff) | ((mainbuf[5] & 0xff) << 8);
+ }
+ memcpy32(host->data_buf, host->main_area0, 1024);
+}
/*
* This function requests the NANDFC to perform a read of the
* NAND device status and returns the current status.
@@ -579,6 +643,10 @@ static void imx_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len)
n = min(n, len);
+ /* handle the read param special case */
+ if ((mtd->writesize == 0) && (len != 0))
+ n = len;
+
memcpy(buf, host->data_buf + col, n);
host->buf_start += n;
@@ -677,8 +745,11 @@ static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
* layers perform a read/write buf operation,
* we will used the saved column adress to index into
* the full page.
+ *
+ * The colum address must be sent to the flash in
+ * order to get the ONFI header (0x20)
*/
- host->send_addr(host, 0);
+ host->send_addr(host, column);
if (host->pagesize_2k)
/* another col addr cycle for 2k page */
host->send_addr(host, 0);
@@ -790,9 +861,11 @@ static void preset_v3(struct mtd_info *mtd)
writel(0, NFC_V3_IPC);
+ /* if the flash has a 224 oob, the NFC must be configured to 218 */
config2 = NFC_V3_CONFIG2_ONE_CYCLE |
NFC_V3_CONFIG2_2CMD_PHASES |
- NFC_V3_CONFIG2_SPAS(mtd->oobsize >> 1) |
+ NFC_V3_CONFIG2_SPAS(((mtd->oobsize > 218) ?
+ 218 : mtd->oobsize) >> 1) |
NFC_V3_CONFIG2_ST_CMD(0x70) |
NFC_V3_CONFIG2_NUM_ADDR_PHASE0;
@@ -944,8 +1017,15 @@ static void imx_nand_command(struct mtd_info *mtd, unsigned command,
case NAND_CMD_READID:
host->send_cmd(host, command);
mxc_do_addr_cycle(mtd, column, page_addr);
- host->buf_start = 0;
host->send_read_id(host);
+ host->buf_start = 0;
+ break;
+
+ case NAND_CMD_PARAM:
+ host->send_cmd(host, command);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+ host->send_read_param(host);
+ host->buf_start = 0;
break;
case NAND_CMD_ERASE1:
@@ -1024,7 +1104,7 @@ static int __init imxnd_probe(struct device_d *dev)
struct mtd_info *mtd;
struct imx_nand_platform_data *pdata = dev->platform_data;
struct imx_nand_host *host;
- struct nand_ecclayout *oob_smallpage, *oob_largepage;
+ struct nand_ecclayout *oob_smallpage, *oob_largepage, *oob_4kpage;
int err = 0;
#ifdef CONFIG_ARCH_IMX27
@@ -1047,6 +1127,7 @@ static int __init imxnd_probe(struct device_d *dev)
host->send_addr = send_addr_v1_v2;
host->send_page = send_page_v1_v2;
host->send_read_id = send_read_id_v1_v2;
+ host->send_read_param = send_read_param_v1_v2; /* FIXME : to check */
host->get_dev_status = get_dev_status_v1_v2;
host->check_int = check_int_v1_v2;
}
@@ -1059,6 +1140,7 @@ static int __init imxnd_probe(struct device_d *dev)
host->spare_len = 64;
oob_smallpage = &nandv2_hw_eccoob_smallpage;
oob_largepage = &nandv2_hw_eccoob_largepage;
+ oob_4kpage = &nandv2_hw_eccoob_4k; /* FIXME : to check */
} else if (nfc_is_v1()) {
host->base = dev_request_mem_region(dev, 0);
host->main_area0 = host->base;
@@ -1067,6 +1149,7 @@ static int __init imxnd_probe(struct device_d *dev)
host->spare_len = 16;
oob_smallpage = &nandv1_hw_eccoob_smallpage;
oob_largepage = &nandv1_hw_eccoob_largepage;
+ oob_4kpage = &nandv1_hw_eccoob_smallpage; /* FIXME : to check */
} else if (nfc_is_v3_2()) {
host->regs_ip = dev_request_mem_region(dev, 0);
host->base = dev_request_mem_region(dev, 1);
@@ -1086,10 +1169,12 @@ static int __init imxnd_probe(struct device_d *dev)
host->send_addr = send_addr_v3;
host->send_page = send_page_v3;
host->send_read_id = send_read_id_v3;
+ host->send_read_param = send_read_param_v3;
host->get_dev_status = get_dev_status_v3;
host->check_int = check_int_v3;
oob_smallpage = &nandv2_hw_eccoob_smallpage;
oob_largepage = &nandv2_hw_eccoob_largepage;
+ oob_4kpage = &nandv2_hw_eccoob_4k;
}
host->dev = dev;
@@ -1161,7 +1246,10 @@ static int __init imxnd_probe(struct device_d *dev)
imx_nand_set_layout(mtd->writesize, pdata->width == 2 ? 16 : 8);
if (mtd->writesize >= 2048) {
- this->ecc.layout = oob_largepage;
+ if (mtd->writesize == 2048)
+ this->ecc.layout = oob_largepage;
+ else
+ this->ecc.layout = oob_4kpage;
host->pagesize_2k = 1;
if (nfc_is_v21())
writew(NFC_V2_SPAS_SPARESIZE(64), host->regs + NFC_V2_SPAS);
--
1.7.7.6
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