[PATCH 13/14] qcom: mtd: nand: support for QPIC version 1.5.0
Abhishek Sahu
absahu at codeaurora.org
Mon Jul 17 00:32:08 PDT 2017
On 2017-07-04 15:27, Archit Taneja wrote:
> On 06/29/2017 12:46 PM, Abhishek Sahu wrote:
>> The current QCOM NAND driver only supports version 1.4.0
>> QCOM QPIC NAND controller. This patch adds the support for
>> version 1.5.0 which contains some of the registers at
>> different offsets. The driver data contains the register offset
>> field which is being initialized with its crossponding register
>
> s/crossponding/corresponding
>
I Will fix this in v2.
>> offsets array. A new compatible string has been added for
>> version 1.5.0 in BAM mode which uses version 1.5.0 register
>> offsets.
>
> Please split into 2 patches.
>
Sure. I will split it.
> Thanks,
> Archit
>
>>
>> Signed-off-by: Abhishek Sahu <absahu at codeaurora.org>
>> ---
>> .../devicetree/bindings/mtd/qcom_nandc.txt | 44
>> ++++++++++++++++++
>> drivers/mtd/nand/qcom_nandc.c | 54
>> ++++++++++++++++++++--
>> 2 files changed, 95 insertions(+), 3 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
>> b/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
>> index 87b9a56..11e2da2 100644
>> --- a/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
>> +++ b/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
>> @@ -4,6 +4,8 @@ Required properties:
>> - compatible: must be one of the following:
>> * "qcom,ebi2-nandc" - EBI2 NAND which uses ADM DMA like IPQ8064.
>> * "qcom,qpic-nandc-v1.4.0" - QPIC NAND v1.4.0 which uses BAM DMA
>> like IPQ4019.
>> + * "qcom,qpic-nandc-v1.5.0" - QPIC NAND v1.5.0 which uses BAM DMA
>> like IPQ8074.
>> +
>> - reg: MMIO address range
>> - clocks: must contain core clock and always on clock
>> - clock-names: must contain "core" for the core clock and "aon" for
>> the
>> @@ -130,3 +132,45 @@ nand at 79b0000 {
>> };
>> };
>> };
>> +
>> +nand at 79b0000 {
>> + compatible = "qcom,qpic-nandc-v1.5.0";
>> + reg = <0x79B0000 0x1000>;
>> +
>> + clocks = <&gcc GCC_QPIC_CLK>,
>> + <&gcc GCC_QPIC_AHB_CLK>;
>> + clock-names = "core", "aon";
>> +
>> + dmas = <&qpicbam 0>,
>> + <&qpicbam 1>,
>> + <&qpicbam 2>;
>> + dma-names = "tx", "rx", "cmd";
>> +
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + nandcs at 0 {
>> + compatible = "qcom,nandcs";
>> + reg = <0>;
>> +
>> + nand-ecc-strength = <4>;
>> + nand-ecc-step-size = <512>;
>> + nand-bus-width = <8>;
>> +
>> + partitions {
>> + compatible = "fixed-partitions";
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> +
>> + partition at 0 {
>> + label = "boot-nand";
>> + reg = <0 0x58a0000>;
>> + };
>> +
>> + partition at 58a0000 {
>> + label = "fs-nand";
>> + reg = <0x58a0000 0x4000000>;
>> + };
>> + };
>> + };
>> +};
>> diff --git a/drivers/mtd/nand/qcom_nandc.c
>> b/drivers/mtd/nand/qcom_nandc.c
>> index 24750e6..641e85d 100644
>> --- a/drivers/mtd/nand/qcom_nandc.c
>> +++ b/drivers/mtd/nand/qcom_nandc.c
>> @@ -430,15 +430,18 @@ struct qcom_nand_host {
>> * This data type corresponds to the nand driver data which will be
>> used at
>> * driver probe time
>> * @ecc_modes - ecc mode for nand
>> + * @regs_offsets - contains the register offsets array pointer.
>> * @dma_bam_enabled - whether this driver is using bam
>> */
>> struct qcom_nand_driver_data {
>> u32 ecc_modes;
>> + const u32 *regs_offsets;
>> bool dma_bam_enabled;
>> };
>>
>> /* Mapping table which contains the actual register offsets */
>> -static const u32 regs_offsets[] = {
>> +/* NAND controller Version 1.4.0 mapping table */
>> +static const u32 regs_offsets_v1_4_0[] = {
>> [NAND_FLASH_CMD] = 0x00,
>> [NAND_ADDR0] = 0x04,
>> [NAND_ADDR1] = 0x08,
>> @@ -471,6 +474,40 @@ struct qcom_nand_driver_data {
>> [NAND_READ_LOCATION_3] = 0xf2c,
>> };
>>
>> +/* NAND controller Version 1.5.0 mapping table */
>> +static const u32 regs_offsets_v1_5_0[] = {
>> + [NAND_FLASH_CMD] = 0x00,
>> + [NAND_ADDR0] = 0x04,
>> + [NAND_ADDR1] = 0x08,
>> + [NAND_FLASH_CHIP_SELECT] = 0x0c,
>> + [NAND_EXEC_CMD] = 0x10,
>> + [NAND_FLASH_STATUS] = 0x14,
>> + [NAND_BUFFER_STATUS] = 0x18,
>> + [NAND_DEV0_CFG0] = 0x20,
>> + [NAND_DEV0_CFG1] = 0x24,
>> + [NAND_DEV0_ECC_CFG] = 0x28,
>> + [NAND_DEV1_ECC_CFG] = 0x2c,
>> + [NAND_DEV1_CFG0] = 0x30,
>> + [NAND_DEV1_CFG1] = 0x34,
>> + [NAND_READ_ID] = 0x40,
>> + [NAND_READ_STATUS] = 0x44,
>> + [NAND_DEV_CMD0] = 0x70a0,
>> + [NAND_DEV_CMD1] = 0x70a4,
>> + [NAND_DEV_CMD2] = 0x70a8,
>> + [NAND_DEV_CMD_VLD] = 0x70ac,
>> + [SFLASHC_BURST_CFG] = 0xe0,
>> + [NAND_ERASED_CW_DETECT_CFG] = 0xe8,
>> + [NAND_ERASED_CW_DETECT_STATUS] = 0xec,
>> + [NAND_EBI2_ECC_BUF_CFG] = 0xf0,
>> + [FLASH_BUF_ACC] = 0x100,
>> + [NAND_CTRL] = 0xf00,
>> + [NAND_VERSION] = 0x4f08,
>> + [NAND_READ_LOCATION_0] = 0xf20,
>> + [NAND_READ_LOCATION_1] = 0xf24,
>> + [NAND_READ_LOCATION_2] = 0xf28,
>> + [NAND_READ_LOCATION_3] = 0xf2c,
>> +};
>> +
>> /* Frees the BAM transaction memory */
>> static void free_bam_transaction(struct qcom_nand_controller *nandc)
>> {
>> @@ -2832,7 +2869,7 @@ static int qcom_nandc_probe(struct
>> platform_device *pdev)
>>
>> nandc->ecc_modes = driver_data->ecc_modes;
>> nandc->dma_bam_enabled = driver_data->dma_bam_enabled;
>> - nandc->regs_offsets = regs_offsets;
>> + nandc->regs_offsets = driver_data->regs_offsets;
>>
>> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> nandc->base = devm_ioremap_resource(dev, res);
>> @@ -2902,16 +2939,24 @@ static int qcom_nandc_remove(struct
>> platform_device *pdev)
>> return 0;
>> }
>>
>> -
>> static const struct qcom_nand_driver_data ebi2_nandc_data = {
>> .ecc_modes = (ECC_RS_4BIT | ECC_BCH_8BIT),
>> .dma_bam_enabled = false,
>> + .regs_offsets = regs_offsets_v1_4_0,
>> };
>>
>> static const struct qcom_nand_driver_data qpic_nandc_v1_4_0_data = {
>> .ecc_modes = (ECC_BCH_4BIT | ECC_BCH_8BIT),
>> .dma_bam_enabled = true,
>> + .regs_offsets = regs_offsets_v1_4_0,
>> +};
>> +
>> +static const struct qcom_nand_driver_data qpic_nandc_v1_5_0_data = {
>> + .ecc_modes = (ECC_BCH_4BIT | ECC_BCH_8BIT),
>> + .dma_bam_enabled = true,
>> + .regs_offsets = regs_offsets_v1_5_0,
>> };
>> +
>> /*
>> * data will hold a struct pointer containing more differences once
>> we support
>> * more controller variants
>> @@ -2923,6 +2968,9 @@ static int qcom_nandc_remove(struct
>> platform_device *pdev)
>> { .compatible = "qcom,qpic-nandc-v1.4.0",
>> .data = (void *)&qpic_nandc_v1_4_0_data,
>> },
>> + { .compatible = "qcom,qpic-nandc-v1.5.0",
>> + .data = (void *)&qpic_nandc_v1_5_0_data,
>> + },
>> {}
>> };
>> MODULE_DEVICE_TABLE(of, qcom_nandc_of_match);
>>
--
Abhishek Sahu
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