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Diffstat (limited to 'drivers/mtd/nand/fsmc_nand.c')
-rw-r--r--drivers/mtd/nand/fsmc_nand.c89
1 files changed, 68 insertions, 21 deletions
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 02edfba25b0..205b10b9f9b 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -31,6 +31,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/mtd/fsmc.h>
+#include <linux/amba/bus.h>
#include <mtd/mtd-abi.h>
static struct nand_ecclayout fsmc_ecc1_layout = {
@@ -119,21 +120,36 @@ static struct fsmc_eccplace fsmc_ecc4_sp_place = {
}
};
-/*
- * Default partition tables to be used if the partition information not
- * provided through platform data
- */
-#define PARTITION(n, off, sz) {.name = n, .offset = off, .size = sz}
+#ifdef CONFIG_MTD_PARTITIONS
/*
+ * Default partition tables to be used if the partition information not
+ * provided through platform data.
+ *
* Default partition layout for small page(= 512 bytes) devices
* Size for "Root file system" is updated in driver based on actual device size
*/
static struct mtd_partition partition_info_16KB_blk[] = {
- PARTITION("X-loader", 0, 4 * 0x4000),
- PARTITION("U-Boot", 0x10000, 20 * 0x4000),
- PARTITION("Kernel", 0x60000, 256 * 0x4000),
- PARTITION("Root File System", 0x460000, 0),
+ {
+ .name = "X-loader",
+ .offset = 0,
+ .size = 4*0x4000,
+ },
+ {
+ .name = "U-Boot",
+ .offset = 0x10000,
+ .size = 20*0x4000,
+ },
+ {
+ .name = "Kernel",
+ .offset = 0x60000,
+ .size = 256*0x4000,
+ },
+ {
+ .name = "Root File System",
+ .offset = 0x460000,
+ .size = 0,
+ },
};
/*
@@ -141,19 +157,37 @@ static struct mtd_partition partition_info_16KB_blk[] = {
* Size for "Root file system" is updated in driver based on actual device size
*/
static struct mtd_partition partition_info_128KB_blk[] = {
- PARTITION("X-loader", 0, 4 * 0x20000),
- PARTITION("U-Boot", 0x80000, 12 * 0x20000),
- PARTITION("Kernel", 0x200000, 48 * 0x20000),
- PARTITION("Root File System", 0x800000, 0),
+ {
+ .name = "X-loader",
+ .offset = 0,
+ .size = 4*0x20000,
+ },
+ {
+ .name = "U-Boot",
+ .offset = 0x80000,
+ .size = 12*0x20000,
+ },
+ {
+ .name = "Kernel",
+ .offset = 0x200000,
+ .size = 48*0x20000,
+ },
+ {
+ .name = "Root File System",
+ .offset = 0x800000,
+ .size = 0,
+ },
};
#ifdef CONFIG_MTD_CMDLINE_PARTS
const char *part_probes[] = { "cmdlinepart", NULL };
#endif
+#endif
/**
- * struct fsmc_nand_data - atructure for FSMC NAND device state
+ * struct fsmc_nand_data - structure for FSMC NAND device state
*
+ * @pid: Part ID on the AMBA PrimeCell format
* @mtd: MTD info for a NAND flash.
* @nand: Chip related info for a NAND flash.
* @partitions: Partition info for a NAND Flash.
@@ -169,6 +203,7 @@ const char *part_probes[] = { "cmdlinepart", NULL };
* @regs_va: FSMC regs base address.
*/
struct fsmc_nand_data {
+ u32 pid;
struct mtd_info mtd;
struct nand_chip nand;
struct mtd_partition *partitions;
@@ -508,7 +543,9 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
struct nand_chip *nand;
struct fsmc_regs *regs;
struct resource *res;
- int nr_parts, ret = 0;
+ int ret = 0;
+ u32 pid;
+ int i;
if (!pdata) {
dev_err(&pdev->dev, "platform data is NULL\n");
@@ -598,6 +635,18 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
if (ret)
goto err_probe1;
+ /*
+ * This device ID is actually a common AMBA ID as used on the
+ * AMBA PrimeCell bus. However it is not a PrimeCell.
+ */
+ for (pid = 0, i = 0; i < 4; i++)
+ pid |= (readl(host->regs_va + resource_size(res) - 0x20 + 4 * i) & 255) << (i * 8);
+ host->pid = pid;
+ dev_info(&pdev->dev, "FSMC device partno %03x, manufacturer %02x, "
+ "revision %02x, config %02x\n",
+ AMBA_PART_BITS(pid), AMBA_MANF_BITS(pid),
+ AMBA_REV_BITS(pid), AMBA_CONFIG_BITS(pid));
+
host->bank = pdata->bank;
host->select_chip = pdata->select_bank;
regs = host->regs_va;
@@ -625,7 +674,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
fsmc_nand_setup(regs, host->bank, nand->options & NAND_BUSWIDTH_16);
- if (get_fsmc_version(host->regs_va) == FSMC_VER8) {
+ if (AMBA_REV_BITS(host->pid) >= 8) {
nand->ecc.read_page = fsmc_read_page_hwecc;
nand->ecc.calculate = fsmc_read_hwecc_ecc4;
nand->ecc.correct = fsmc_correct_data;
@@ -645,7 +694,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
goto err_probe;
}
- if (get_fsmc_version(host->regs_va) == FSMC_VER8) {
+ if (AMBA_REV_BITS(host->pid) >= 8) {
if (host->mtd.writesize == 512) {
nand->ecc.layout = &fsmc_ecc4_sp_layout;
host->ecc_place = &fsmc_ecc4_sp_place;
@@ -676,11 +725,9 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
* Check if partition info passed via command line
*/
host->mtd.name = "nand";
- nr_parts = parse_mtd_partitions(&host->mtd, part_probes,
+ host->nr_partitions = parse_mtd_partitions(&host->mtd, part_probes,
&host->partitions, 0);
- if (nr_parts > 0) {
- host->nr_partitions = nr_parts;
- } else {
+ if (host->nr_partitions <= 0) {
#endif
/*
* Check if partition info passed via command line