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authorLinus Walleij <linus.walleij@stericsson.com>2010-11-29 13:52:19 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-12-03 16:35:30 +0000
commit593cd8711221c9661dbf9beb2fb42fecca03e693 (patch)
tree6f335d79b029a0e238f737b1cfb00b1fdba2ff63 /drivers
parent4ad916bca7c372110815e77c2db95fb2eb2f8ab3 (diff)
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mtd: FSMC NAND use the PrimeCell identifier macros
The FSMC actually has a standard ARM PrimeCell ID register, and the "revision" part of that register contains the thing that the code is looking at. Reuse the infrastructure from the AMBA bus abstraction and rid local defines. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/nand/fsmc_nand.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index 5af4b3c..205b10b 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 = {
@@ -184,8 +185,9 @@ const char *part_probes[] = { "cmdlinepart", NULL };
#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.
@@ -201,6 +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;
@@ -541,6 +544,8 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
struct fsmc_regs *regs;
struct resource *res;
int ret = 0;
+ u32 pid;
+ int i;
if (!pdata) {
dev_err(&pdev->dev, "platform data is NULL\n");
@@ -630,6 +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;
@@ -657,7 +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;
@@ -677,7 +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;