[PATCH 03/11] fsmc/nand: Support multiple banks connected to controller
Vipin Kumar
vipin.kumar at st.com
Tue Oct 9 06:44:45 EDT 2012
Support up to max_banks number of banks in fsmc driver.
Signed-off-by: Vipin Kumar <vipin.kumar at st.com>
---
.../devicetree/bindings/mtd/fsmc-nand.txt | 2 ++
arch/arm/boot/dts/spear300.dtsi | 1 +
arch/arm/boot/dts/spear310.dtsi | 1 +
arch/arm/boot/dts/spear320.dtsi | 1 +
arch/arm/boot/dts/spear600.dtsi | 1 +
arch/arm/mach-u300/core.c | 1 +
drivers/mtd/nand/fsmc_nand.c | 26 +++++++++++++++-------
include/linux/mtd/fsmc.h | 2 +-
8 files changed, 26 insertions(+), 9 deletions(-)
diff --git a/Documentation/devicetree/bindings/mtd/fsmc-nand.txt b/Documentation/devicetree/bindings/mtd/fsmc-nand.txt
index e2c663b..29d1a2f 100644
--- a/Documentation/devicetree/bindings/mtd/fsmc-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/fsmc-nand.txt
@@ -6,6 +6,7 @@ Required properties:
- reg-names: Should contain the reg names "fsmc_regs" and "nand_data"
- st,ale-off : Chip specific offset to ALE
- st,cle-off : Chip specific offset to CLE
+- maxbanks: Number of banks supported by SoC
Optional properties:
- bank-width : Width (in bytes) of the device. If not present, the width
@@ -23,6 +24,7 @@ Example:
reg-names = "fsmc_regs", "nand_data";
st,ale-off = <0x20000>;
st,cle-off = <0x10000>;
+ maxbanks = <1>;
bank-width = <1>;
nand-skip-bbtscan;
diff --git a/arch/arm/boot/dts/spear300.dtsi b/arch/arm/boot/dts/spear300.dtsi
index ed3627c..19e2328 100644
--- a/arch/arm/boot/dts/spear300.dtsi
+++ b/arch/arm/boot/dts/spear300.dtsi
@@ -42,6 +42,7 @@
reg-names = "fsmc_regs", "nand_data";
st,ale-off = <0x20000>;
st,cle-off = <0x10000>;
+ maxbanks = <1>;
status = "disabled";
};
diff --git a/arch/arm/boot/dts/spear310.dtsi b/arch/arm/boot/dts/spear310.dtsi
index 62fc4fb..0272afb3 100644
--- a/arch/arm/boot/dts/spear310.dtsi
+++ b/arch/arm/boot/dts/spear310.dtsi
@@ -36,6 +36,7 @@
reg-names = "fsmc_regs", "nand_data";
st,ale-off = <0x10000>;
st,cle-off = <0x20000>;
+ maxbanks = <1>;
status = "disabled";
};
diff --git a/arch/arm/boot/dts/spear320.dtsi b/arch/arm/boot/dts/spear320.dtsi
index 1f49d69..69fe50d 100644
--- a/arch/arm/boot/dts/spear320.dtsi
+++ b/arch/arm/boot/dts/spear320.dtsi
@@ -42,6 +42,7 @@
reg-names = "fsmc_regs", "nand_data";
st,ale-off = <0x20000>;
st,cle-off = <0x10000>;
+ maxbanks = <1>;
status = "disabled";
};
diff --git a/arch/arm/boot/dts/spear600.dtsi b/arch/arm/boot/dts/spear600.dtsi
index a3c36e4..6ed57c8 100644
--- a/arch/arm/boot/dts/spear600.dtsi
+++ b/arch/arm/boot/dts/spear600.dtsi
@@ -71,6 +71,7 @@
reg-names = "fsmc_regs", "nand_data";
st,ale-off = <0x20000>;
st,cle-off = <0x10000>;
+ maxbanks = <1>;
status = "disabled";
};
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
index 03acf18..5ea9f71 100644
--- a/arch/arm/mach-u300/core.c
+++ b/arch/arm/mach-u300/core.c
@@ -1546,6 +1546,7 @@ static struct fsmc_nand_platform_data nand_platform_data = {
.width = FSMC_NAND_BW8,
.ale_off = PLAT_NAND_ALE,
.cle_off = PLAT_NAND_CLE,
+ .max_banks = 1,
};
static struct platform_device nand_device = {
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index bd89580..fc6a044 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -298,6 +298,7 @@ static struct fsmc_eccplace fsmc_ecc4_sp_place = {
* - Word access (CPU)
* - None (Use driver default ie bus width specific
* CPU access)
+ * @max_banks: Maximum number of banks supported
* @select_chip: Select a particular bank
*
* @data_pa: NAND Physical port for Data
@@ -325,6 +326,7 @@ struct fsmc_nand_data {
struct mtd_partition *partitions;
unsigned int nr_partitions;
enum access_mode mode;
+ uint32_t max_banks;
void (*select_chip)(uint32_t bank, uint32_t busw);
/* Virtual/Physical addresses for CPU/DMA access */
@@ -343,6 +345,7 @@ static void fsmc_select_chip(struct mtd_info *mtd, int chipnr)
host = container_of(mtd, struct fsmc_nand_data, mtd);
+ host->bank = chipnr;
switch (chipnr) {
case -1:
chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
@@ -889,6 +892,7 @@ static int __devinit fsmc_nand_probe_config_dt(struct platform_device *pdev,
of_property_read_u32(np, "st,cle-off", &pdata->cle_off);
if (of_get_property(np, "nand-skip-bbtscan", NULL))
pdata->options = NAND_SKIP_BBTSCAN;
+ of_property_read_u32(np, "maxbanks", &pdata->max_banks);
return 0;
}
@@ -915,7 +919,7 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
struct resource *res;
dma_cap_mask_t mask;
int ret = 0;
- u32 pid;
+ u32 pid, bank;
int i;
if (np) {
@@ -1023,13 +1027,13 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
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;
host->partitions = pdata->partitions;
host->nr_partitions = pdata->nr_partitions;
host->dev = &pdev->dev;
host->dev_timings = pdata->nand_timings;
host->mode = pdata->mode;
+ host->max_banks = pdata->max_banks;
if (host->mode == USE_DMA_ACCESS)
init_completion(&host->dma_access_complete);
@@ -1083,9 +1087,10 @@ static int __init fsmc_nand_probe(struct platform_device *pdev)
break;
}
- fsmc_nand_setup(host->regs_va, host->bank,
- nand->options & NAND_BUSWIDTH_16,
- host->dev_timings);
+ for (bank = 0; bank < host->max_banks; bank++)
+ fsmc_nand_setup(host->regs_va, bank,
+ nand->options & NAND_BUSWIDTH_16,
+ host->dev_timings);
if (AMBA_REV_BITS(host->pid) >= 8) {
nand->ecc.read_page = fsmc_read_page_hwecc;
@@ -1230,11 +1235,16 @@ static int fsmc_nand_suspend(struct device *dev)
static int fsmc_nand_resume(struct device *dev)
{
struct fsmc_nand_data *host = dev_get_drvdata(dev);
+ uint32_t bank;
+
if (host) {
clk_prepare_enable(host->clk);
- fsmc_nand_setup(host->regs_va, host->bank,
- host->nand.options & NAND_BUSWIDTH_16,
- host->dev_timings);
+
+ for (bank = 0; bank < host->max_banks; bank++)
+ fsmc_nand_setup(host->regs_va, bank,
+ host->nand.options & NAND_BUSWIDTH_16,
+ host->dev_timings);
+
}
return 0;
}
diff --git a/include/linux/mtd/fsmc.h b/include/linux/mtd/fsmc.h
index b200292..f0ab734 100644
--- a/include/linux/mtd/fsmc.h
+++ b/include/linux/mtd/fsmc.h
@@ -153,7 +153,7 @@ struct fsmc_nand_platform_data {
unsigned int nr_partitions;
unsigned int options;
unsigned int width;
- unsigned int bank;
+ unsigned int max_banks;
/* CLE, ALE offsets */
unsigned int cle_off;
--
1.7.11.4
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