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Date: Thu, 4 Aug 2016 15:58:33 -0700
From: York Sun <york.sun@....com>
To: <linux-edac@...r.kernel.org>
CC: <morbidrsa@...il.com>, <oss@...error.net>, <stuart.yoder@....com>,
<bp@...en8.de>, York Sun <york.sun@....com>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Doug Thompson <dougthompson@...ssion.com>,
<mchehab@...nel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: [Patch v3 08/11] driver/edac/fsl_ddr: Add support of little endian
Get endianness from device tree. Both big endian and little endian
are supported. Default to big endian for backward compatibility to
MPC85xx.
Signed-off-by: York Sun <york.sun@....com>
---
Change log
v3: no change
v2: Separated from "Add support for ARM-based SoCs" patch
.../fsl/ddr.txt} | 6 ++
drivers/edac/fsl_ddr_edac.c | 83 ++++++++++++++--------
2 files changed, 58 insertions(+), 31 deletions(-)
rename Documentation/devicetree/bindings/{powerpc/fsl/mem-ctrlr.txt => memory-controllers/fsl/ddr.txt} (74%)
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/mem-ctrlr.txt b/Documentation/devicetree/bindings/memory-controllers/fsl/ddr.txt
similarity index 74%
rename from Documentation/devicetree/bindings/powerpc/fsl/mem-ctrlr.txt
rename to Documentation/devicetree/bindings/memory-controllers/fsl/ddr.txt
index f87856f..62623f9 100644
--- a/Documentation/devicetree/bindings/powerpc/fsl/mem-ctrlr.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/fsl/ddr.txt
@@ -7,6 +7,10 @@ Properties:
"fsl,qoriq-memory-controller".
- reg : Address and size of DDR controller registers
- interrupts : Error interrupt of DDR controller
+- little-endian : Specifies little-endian access to registers
+- big-endian : Specifies big-endian access to registers
+
+If both little-endian and big-endian are omitted, big-endian will be used.
Example 1:
@@ -14,6 +18,7 @@ Example 1:
compatible = "fsl,bsc9132-memory-controller";
reg = <0x2000 0x1000>;
interrupts = <16 2 1 8>;
+ big-endian;
};
@@ -24,4 +29,5 @@ Example 2:
"fsl,qoriq-memory-controller";
reg = <0x8000 0x1000>;
interrupts = <16 2 1 23>;
+ big-endian;
};
diff --git a/drivers/edac/fsl_ddr_edac.c b/drivers/edac/fsl_ddr_edac.c
index 88ecf7d..b1b7924 100644
--- a/drivers/edac/fsl_ddr_edac.c
+++ b/drivers/edac/fsl_ddr_edac.c
@@ -9,7 +9,6 @@
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
- *
*/
#include <linux/module.h>
#include <linux/init.h>
@@ -33,6 +32,20 @@ static int edac_mc_idx;
static u32 orig_ddr_err_disable;
static u32 orig_ddr_err_sbe;
+static bool little_endian;
+
+static inline u32 ddr_in32(void __iomem *addr)
+{
+ return little_endian ? ioread32(addr) : ioread32be(addr);
+}
+
+static inline void ddr_out32(void __iomem *addr, u32 value)
+{
+ if (little_endian)
+ iowrite32(value, addr);
+ else
+ iowrite32be(value, addr);
+}
/************************ MC SYSFS parts ***********************************/
@@ -45,7 +58,7 @@ static ssize_t fsl_ddr_mc_inject_data_hi_show(struct device *dev,
struct mem_ctl_info *mci = to_mci(dev);
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
- in_be32(pdata->mc_vbase +
+ ddr_in32(pdata->mc_vbase +
MC_DATA_ERR_INJECT_HI));
}
@@ -56,7 +69,7 @@ static ssize_t fsl_ddr_mc_inject_data_lo_show(struct device *dev,
struct mem_ctl_info *mci = to_mci(dev);
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
- in_be32(pdata->mc_vbase +
+ ddr_in32(pdata->mc_vbase +
MC_DATA_ERR_INJECT_LO));
}
@@ -67,7 +80,7 @@ static ssize_t fsl_ddr_mc_inject_ctrl_show(struct device *dev,
struct mem_ctl_info *mci = to_mci(dev);
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
return sprintf(data, "0x%08x",
- in_be32(pdata->mc_vbase + MC_ECC_ERR_INJECT));
+ ddr_in32(pdata->mc_vbase + MC_ECC_ERR_INJECT));
}
static ssize_t fsl_ddr_mc_inject_data_hi_store(struct device *dev,
@@ -77,7 +90,7 @@ static ssize_t fsl_ddr_mc_inject_data_hi_store(struct device *dev,
struct mem_ctl_info *mci = to_mci(dev);
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
- out_be32(pdata->mc_vbase + MC_DATA_ERR_INJECT_HI,
+ ddr_out32(pdata->mc_vbase + MC_DATA_ERR_INJECT_HI,
simple_strtoul(data, NULL, 0));
return count;
}
@@ -91,7 +104,7 @@ static ssize_t fsl_ddr_mc_inject_data_lo_store(struct device *dev,
struct mem_ctl_info *mci = to_mci(dev);
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
- out_be32(pdata->mc_vbase + MC_DATA_ERR_INJECT_LO,
+ ddr_out32(pdata->mc_vbase + MC_DATA_ERR_INJECT_LO,
simple_strtoul(data, NULL, 0));
return count;
}
@@ -105,7 +118,7 @@ static ssize_t fsl_ddr_mc_inject_ctrl_store(struct device *dev,
struct mem_ctl_info *mci = to_mci(dev);
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
if (isdigit(*data)) {
- out_be32(pdata->mc_vbase + MC_ECC_ERR_INJECT,
+ ddr_out32(pdata->mc_vbase + MC_ECC_ERR_INJECT,
simple_strtoul(data, NULL, 0));
return count;
}
@@ -252,7 +265,7 @@ static void fsl_ddr_mc_check(struct mem_ctl_info *mci)
int bad_data_bit;
int bad_ecc_bit;
- err_detect = in_be32(pdata->mc_vbase + MC_ERR_DETECT);
+ err_detect = ddr_in32(pdata->mc_vbase + MC_ERR_DETECT);
if (!err_detect)
return;
@@ -261,14 +274,14 @@ static void fsl_ddr_mc_check(struct mem_ctl_info *mci)
/* no more processing if not ECC bit errors */
if (!(err_detect & (DDR_EDE_SBE | DDR_EDE_MBE))) {
- out_be32(pdata->mc_vbase + MC_ERR_DETECT, err_detect);
+ ddr_out32(pdata->mc_vbase + MC_ERR_DETECT, err_detect);
return;
}
- syndrome = in_be32(pdata->mc_vbase + MC_CAPTURE_ECC);
+ syndrome = ddr_in32(pdata->mc_vbase + MC_CAPTURE_ECC);
/* Mask off appropriate bits of syndrome based on bus width */
- bus_width = (in_be32(pdata->mc_vbase + MC_DDR_SDRAM_CFG) &
+ bus_width = (ddr_in32(pdata->mc_vbase + MC_DDR_SDRAM_CFG) &
DSC_DBW_MASK) ? 32 : 64;
if (bus_width == 64)
syndrome &= 0xff;
@@ -276,8 +289,8 @@ static void fsl_ddr_mc_check(struct mem_ctl_info *mci)
syndrome &= 0xffff;
err_addr = make64(
- in_be32(pdata->mc_vbase + MC_CAPTURE_EXT_ADDRESS),
- in_be32(pdata->mc_vbase + MC_CAPTURE_ADDRESS));
+ ddr_in32(pdata->mc_vbase + MC_CAPTURE_EXT_ADDRESS),
+ ddr_in32(pdata->mc_vbase + MC_CAPTURE_ADDRESS));
pfn = err_addr >> PAGE_SHIFT;
for (row_index = 0; row_index < mci->nr_csrows; row_index++) {
@@ -286,8 +299,8 @@ static void fsl_ddr_mc_check(struct mem_ctl_info *mci)
break;
}
- cap_high = in_be32(pdata->mc_vbase + MC_CAPTURE_DATA_HI);
- cap_low = in_be32(pdata->mc_vbase + MC_CAPTURE_DATA_LO);
+ cap_high = ddr_in32(pdata->mc_vbase + MC_CAPTURE_DATA_HI);
+ cap_low = ddr_in32(pdata->mc_vbase + MC_CAPTURE_DATA_LO);
/*
* Analyze single-bit errors on 64-bit wide buses
@@ -333,7 +346,7 @@ static void fsl_ddr_mc_check(struct mem_ctl_info *mci)
row_index, 0, -1,
mci->ctl_name, "");
- out_be32(pdata->mc_vbase + MC_ERR_DETECT, err_detect);
+ ddr_out32(pdata->mc_vbase + MC_ERR_DETECT, err_detect);
}
static irqreturn_t fsl_ddr_mc_isr(int irq, void *dev_id)
@@ -342,7 +355,7 @@ static irqreturn_t fsl_ddr_mc_isr(int irq, void *dev_id)
struct fsl_ddr_mc_pdata *pdata = mci->pvt_info;
u32 err_detect;
- err_detect = in_be32(pdata->mc_vbase + MC_ERR_DETECT);
+ err_detect = ddr_in32(pdata->mc_vbase + MC_ERR_DETECT);
if (!err_detect)
return IRQ_NONE;
@@ -362,7 +375,7 @@ static void fsl_ddr_init_csrows(struct mem_ctl_info *mci)
u32 cs_bnds;
int index;
- sdram_ctl = in_be32(pdata->mc_vbase + MC_DDR_SDRAM_CFG);
+ sdram_ctl = ddr_in32(pdata->mc_vbase + MC_DDR_SDRAM_CFG);
sdtype = sdram_ctl & DSC_SDTYPE_MASK;
if (sdram_ctl & DSC_RD_EN) {
@@ -410,7 +423,7 @@ static void fsl_ddr_init_csrows(struct mem_ctl_info *mci)
csrow = mci->csrows[index];
dimm = csrow->channels[0]->dimm;
- cs_bnds = in_be32(pdata->mc_vbase + MC_CS_BNDS_0 +
+ cs_bnds = ddr_in32(pdata->mc_vbase + MC_CS_BNDS_0 +
(index * MC_CS_BNDS_OFS));
start = (cs_bnds & 0xffff0000) >> 16;
@@ -470,6 +483,13 @@ int fsl_ddr_mc_err_probe(struct platform_device *op)
mci->ctl_name = pdata->name;
mci->dev_name = pdata->name;
+ if (of_find_property(op->dev.of_node, "little-endian", NULL))
+ little_endian = true;
+ else if (of_find_property(op->dev.of_node, "big-endian", NULL))
+ little_endian = false;
+ else
+ little_endian = false;
+
res = of_address_to_resource(op->dev.of_node, 0, &r);
if (res) {
pr_err("%s: Unable to get resource for MC err regs\n",
@@ -492,7 +512,7 @@ int fsl_ddr_mc_err_probe(struct platform_device *op)
goto err;
}
- sdram_ctl = in_be32(pdata->mc_vbase + MC_DDR_SDRAM_CFG);
+ sdram_ctl = ddr_in32(pdata->mc_vbase + MC_DDR_SDRAM_CFG);
if (!(sdram_ctl & DSC_ECC_EN)) {
/* no ECC */
pr_warn("%s: No ECC DIMMs discovered\n", __func__);
@@ -520,11 +540,11 @@ int fsl_ddr_mc_err_probe(struct platform_device *op)
/* store the original error disable bits */
orig_ddr_err_disable =
- in_be32(pdata->mc_vbase + MC_ERR_DISABLE);
- out_be32(pdata->mc_vbase + MC_ERR_DISABLE, 0);
+ ddr_in32(pdata->mc_vbase + MC_ERR_DISABLE);
+ ddr_out32(pdata->mc_vbase + MC_ERR_DISABLE, 0);
/* clear all error bits */
- out_be32(pdata->mc_vbase + MC_ERR_DETECT, ~0);
+ ddr_out32(pdata->mc_vbase + MC_ERR_DETECT, ~0);
if (edac_mc_add_mc_with_groups(mci, fsl_ddr_dev_groups)) {
edac_dbg(3, "failed edac_mc_add_mc()\n");
@@ -532,15 +552,15 @@ int fsl_ddr_mc_err_probe(struct platform_device *op)
}
if (edac_op_state == EDAC_OPSTATE_INT) {
- out_be32(pdata->mc_vbase + MC_ERR_INT_EN,
- DDR_EIE_MBEE | DDR_EIE_SBEE);
+ ddr_out32(pdata->mc_vbase + MC_ERR_INT_EN,
+ DDR_EIE_MBEE | DDR_EIE_SBEE);
/* store the original error management threshold */
- orig_ddr_err_sbe = in_be32(pdata->mc_vbase +
+ orig_ddr_err_sbe = ddr_in32(pdata->mc_vbase +
MC_ERR_SBE) & 0xff0000;
/* set threshold to 1 error per interrupt */
- out_be32(pdata->mc_vbase + MC_ERR_SBE, 0x10000);
+ ddr_out32(pdata->mc_vbase + MC_ERR_SBE, 0x10000);
/* register interrupts */
pdata->irq = irq_of_parse_and_map(op->dev.of_node, 0);
@@ -573,6 +593,7 @@ err:
edac_mc_free(mci);
return res;
}
+EXPORT_SYMBOL_GPL(fsl_ddr_mc_err_probe);
int fsl_ddr_mc_err_remove(struct platform_device *op)
{
@@ -582,13 +603,13 @@ int fsl_ddr_mc_err_remove(struct platform_device *op)
edac_dbg(0, "\n");
if (edac_op_state == EDAC_OPSTATE_INT) {
- out_be32(pdata->mc_vbase + MC_ERR_INT_EN, 0);
irq_dispose_mapping(pdata->irq);
+ ddr_out32(pdata->mc_vbase + MC_ERR_INT_EN, 0);
}
- out_be32(pdata->mc_vbase + MC_ERR_DISABLE,
- orig_ddr_err_disable);
- out_be32(pdata->mc_vbase + MC_ERR_SBE, orig_ddr_err_sbe);
+ ddr_out32(pdata->mc_vbase + MC_ERR_DISABLE,
+ orig_ddr_err_disable);
+ ddr_out32(pdata->mc_vbase + MC_ERR_SBE, orig_ddr_err_sbe);
edac_mc_del_mc(&op->dev);
edac_mc_free(mci);
--
2.7.4
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