Re: [PATCH v2 4/6] mtd: nand: gpmi: add GPMI NAND support for i.MX7D

From: Han Xu
Date: Wed Aug 26 2015 - 16:29:33 EST

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Hi Shijie,

The features for MX6 and MX7 are not identical, I would love to use
two macros in this patch and will push another patch to use quirks to
distinguish them, is that Okay for you?

On Tue, Aug 18, 2015 at 1:52 AM, Huang Shijie <shijie.huang@xxxxxxx> wrote:
> On Mon, Aug 17, 2015 at 10:24:55PM -0500, Han Xu wrote:
>> support GPMI NAND on i.MX7D
>>
>> Signed-off-by: Han Xu <b45815@xxxxxxxxxxxxx>
>> ---
>> drivers/mtd/nand/gpmi-nand/bch-regs.h | 14 +++++++-------
>> drivers/mtd/nand/gpmi-nand/gpmi-lib.c | 10 ++++++----
>> drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 24 ++++++++++++++++++++----
>> drivers/mtd/nand/gpmi-nand/gpmi-nand.h | 7 +++++--
>> 4 files changed, 38 insertions(+), 17 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/gpmi-nand/bch-regs.h b/drivers/mtd/nand/gpmi-nand/bch-regs.h
>> index 05bb91f..53e58bc 100644
>> --- a/drivers/mtd/nand/gpmi-nand/bch-regs.h
>> +++ b/drivers/mtd/nand/gpmi-nand/bch-regs.h
>> @@ -1,7 +1,7 @@
>> /*
>> * Freescale GPMI NAND Flash Driver
>> *
>> - * Copyright 2008-2011 Freescale Semiconductor, Inc.
>> + * Copyright 2008-2015 Freescale Semiconductor, Inc.
>> * Copyright 2008 Embedded Alley Solutions, Inc.
>> *
>> * This program is free software; you can redistribute it and/or modify
>> @@ -54,7 +54,7 @@
>> #define MX6Q_BP_BCH_FLASH0LAYOUT0_ECC0 11
>> #define MX6Q_BM_BCH_FLASH0LAYOUT0_ECC0 (0x1f << MX6Q_BP_BCH_FLASH0LAYOUT0_ECC0)
>> #define BF_BCH_FLASH0LAYOUT0_ECC0(v, x) \
>> - (GPMI_IS_MX6(x) \
>> + ((GPMI_IS_MX6(x) || GPMI_IS_MX7(x)) \
>
> I suggest we can introduce a new macro to wrap it:
> #define GPMI_IS_MX(x) (GPMI_IS_MX6(x) || GPMI_IS_MX7(x)
>
> So when the imx8 or imx9 appear, we only change the GPMI_IS_MX(), and we do not need to
> change so many places as show below.
>
> thanks
> Huang Shijie
>
>
>> ? (((v) << MX6Q_BP_BCH_FLASH0LAYOUT0_ECC0) \
>> & MX6Q_BM_BCH_FLASH0LAYOUT0_ECC0) \
>> : (((v) << BP_BCH_FLASH0LAYOUT0_ECC0) \
>> @@ -65,7 +65,7 @@
>> #define MX6Q_BM_BCH_FLASH0LAYOUT0_GF_13_14 \
>> (0x1 << MX6Q_BP_BCH_FLASH0LAYOUT0_GF_13_14)
>> #define BF_BCH_FLASH0LAYOUT0_GF(v, x) \
>> - ((GPMI_IS_MX6(x) && ((v) == 14)) \
>> + (((GPMI_IS_MX6(x) || GPMI_IS_MX7(x)) && ((v) == 14))\
>> ? (((1) << MX6Q_BP_BCH_FLASH0LAYOUT0_GF_13_14) \
>> & MX6Q_BM_BCH_FLASH0LAYOUT0_GF_13_14) \
>> : 0 \
>> @@ -77,7 +77,7 @@
>> #define MX6Q_BM_BCH_FLASH0LAYOUT0_DATA0_SIZE \
>> (0x3ff << BP_BCH_FLASH0LAYOUT0_DATA0_SIZE)
>> #define BF_BCH_FLASH0LAYOUT0_DATA0_SIZE(v, x) \
>> - (GPMI_IS_MX6(x) \
>> + ((GPMI_IS_MX6(x) || GPMI_IS_MX7(x)) \
>> ? (((v) >> 2) & MX6Q_BM_BCH_FLASH0LAYOUT0_DATA0_SIZE) \
>> : ((v) & BM_BCH_FLASH0LAYOUT0_DATA0_SIZE) \
>> )
>> @@ -96,7 +96,7 @@
>> #define MX6Q_BP_BCH_FLASH0LAYOUT1_ECCN 11
>> #define MX6Q_BM_BCH_FLASH0LAYOUT1_ECCN (0x1f << MX6Q_BP_BCH_FLASH0LAYOUT1_ECCN)
>> #define BF_BCH_FLASH0LAYOUT1_ECCN(v, x) \
>> - (GPMI_IS_MX6(x) \
>> + ((GPMI_IS_MX6(x) || GPMI_IS_MX7(x)) \
>> ? (((v) << MX6Q_BP_BCH_FLASH0LAYOUT1_ECCN) \
>> & MX6Q_BM_BCH_FLASH0LAYOUT1_ECCN) \
>> : (((v) << BP_BCH_FLASH0LAYOUT1_ECCN) \
>> @@ -107,7 +107,7 @@
>> #define MX6Q_BM_BCH_FLASH0LAYOUT1_GF_13_14 \
>> (0x1 << MX6Q_BP_BCH_FLASH0LAYOUT1_GF_13_14)
>> #define BF_BCH_FLASH0LAYOUT1_GF(v, x) \
>> - ((GPMI_IS_MX6(x) && ((v) == 14)) \
>> + (((GPMI_IS_MX6(x) || GPMI_IS_MX7(x)) && ((v) == 14))\
>> ? (((1) << MX6Q_BP_BCH_FLASH0LAYOUT1_GF_13_14) \
>> & MX6Q_BM_BCH_FLASH0LAYOUT1_GF_13_14) \
>> : 0 \
>> @@ -119,7 +119,7 @@
>> #define MX6Q_BM_BCH_FLASH0LAYOUT1_DATAN_SIZE \
>> (0x3ff << BP_BCH_FLASH0LAYOUT1_DATAN_SIZE)
>> #define BF_BCH_FLASH0LAYOUT1_DATAN_SIZE(v, x) \
>> - (GPMI_IS_MX6(x) \
>> + ((GPMI_IS_MX6(x) || GPMI_IS_MX7(x)) \
>> ? (((v) >> 2) & MX6Q_BM_BCH_FLASH0LAYOUT1_DATAN_SIZE) \
>> : ((v) & BM_BCH_FLASH0LAYOUT1_DATAN_SIZE) \
>> )
>> diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
>> index 43fa16b..6b37414 100644
>> --- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
>> +++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
>> @@ -1,7 +1,7 @@
>> /*
>> * Freescale GPMI NAND Flash Driver
>> *
>> - * Copyright (C) 2008-2011 Freescale Semiconductor, Inc.
>> + * Copyright (C) 2008-2015 Freescale Semiconductor, Inc.
>> * Copyright (C) 2008 Embedded Alley Solutions, Inc.
>> *
>> * This program is free software; you can redistribute it and/or modify
>> @@ -971,7 +971,8 @@ int gpmi_extra_init(struct gpmi_nand_data *this)
>> struct nand_chip *chip = &this->nand;
>>
>> /* Enable the asynchronous EDO feature. */
>> - if (GPMI_IS_MX6(this) && chip->onfi_version) {
>> + if ((GPMI_IS_MX6(this) || GPMI_IS_MX7(this))
>> + && chip->onfi_version) {
>> int mode = onfi_get_async_timing_mode(chip);
>>
>> /* We only support the timing mode 4 and mode 5. */
>> @@ -1093,12 +1094,13 @@ int gpmi_is_ready(struct gpmi_nand_data *this, unsigned chip)
>> if (GPMI_IS_MX23(this)) {
>> mask = MX23_BM_GPMI_DEBUG_READY0 << chip;
>> reg = readl(r->gpmi_regs + HW_GPMI_DEBUG);
>> - } else if (GPMI_IS_MX28(this) || GPMI_IS_MX6(this)) {
>> + } else if (GPMI_IS_MX28(this) || GPMI_IS_MX6(this) ||
>> + GPMI_IS_MX7(this)) {
>> /*
>> * In the imx6, all the ready/busy pins are bound
>> * together. So we only need to check chip 0.
>> */
>> - if (GPMI_IS_MX6(this))
>> + if (GPMI_IS_MX6(this) || GPMI_IS_MX7(this))
>> chip = 0;
>>
>> /* MX28 shares the same R/B register as MX6Q. */
>> diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>> index 01d24dd..0462103 100644
>> --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>> +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
>> @@ -77,6 +77,12 @@ static const struct gpmi_devdata gpmi_devdata_imx6sx = {
>> .max_chain_delay = 12,
>> };
>>
>> +static const struct gpmi_devdata gpmi_devdata_imx7d = {
>> + .type = IS_MX7D,
>> + .bch_max_ecc_strength = 62,
>> + .max_chain_delay = 12,
>> +};
>> +
>> static irqreturn_t bch_irq(int irq, void *cookie)
>> {
>> struct gpmi_nand_data *this = cookie;
>> @@ -575,6 +581,10 @@ static char *extra_clks_for_mx6q[GPMI_CLK_MAX] = {
>> "gpmi_apb", "gpmi_bch", "gpmi_bch_apb", "per1_bch",
>> };
>>
>> +static char *extra_clks_for_mx7d[GPMI_CLK_MAX] = {
>> + "gpmi_bch_apb",
>> +};
>> +
>> static int gpmi_get_clks(struct gpmi_nand_data *this)
>> {
>> struct resources *r = &this->resources;
>> @@ -592,6 +602,8 @@ static int gpmi_get_clks(struct gpmi_nand_data *this)
>> /* Get extra clocks */
>> if (GPMI_IS_MX6(this))
>> extra_clks = extra_clks_for_mx6q;
>> + if (GPMI_IS_MX7(this))
>> + extra_clks = extra_clks_for_mx7d;
>> if (!extra_clks)
>> return 0;
>>
>> @@ -608,7 +620,7 @@ static int gpmi_get_clks(struct gpmi_nand_data *this)
>> r->clock[i] = clk;
>> }
>>
>> - if (GPMI_IS_MX6(this))
>> + if (GPMI_IS_MX6(this) || GPMI_IS_MX7(this))
>> /*
>> * Set the default value for the gpmi clock.
>> *
>> @@ -1869,7 +1881,7 @@ static int gpmi_init_last(struct gpmi_nand_data *this)
>> * (1) the chip is imx6, and
>> * (2) the size of the ECC parity is byte aligned.
>> */
>> - if (GPMI_IS_MX6(this) &&
>> + if ((GPMI_IS_MX6(this) || GPMI_IS_MX7(this)) &&
>> ((bch_geo->gf_len * bch_geo->ecc_strength) % 8) == 0) {
>> ecc->read_subpage = gpmi_ecc_read_subpage;
>> chip->options |= NAND_SUBPAGE_READ;
>> @@ -1936,7 +1948,8 @@ static int gpmi_nand_init(struct gpmi_nand_data *this)
>> if (ret)
>> goto err_out;
>>
>> - ret = nand_scan_ident(mtd, GPMI_IS_MX6(this) ? 2 : 1, NULL);
>> + ret = nand_scan_ident(mtd, GPMI_IS_MX6(this) || GPMI_IS_MX7(this)\
>> + ? 2 : 1, NULL);
>> if (ret)
>> goto err_out;
>>
>> @@ -1980,7 +1993,10 @@ static const struct of_device_id gpmi_nand_id_table[] = {
>> }, {
>> .compatible = "fsl,imx6sx-gpmi-nand",
>> .data = &gpmi_devdata_imx6sx,
>> - }, {}
>> + }, {
>> + .compatible = "fsl,imx7d-gpmi-nand",
>> + .data = (void *)&gpmi_devdata_imx7d,
>> + }
>> };
>> MODULE_DEVICE_TABLE(of, gpmi_nand_id_table);
>>
>> diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.h b/drivers/mtd/nand/gpmi-nand/gpmi-nand.h
>> index 544062f..1e105f1 100644
>> --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.h
>> +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.h
>> @@ -1,7 +1,7 @@
>> /*
>> * Freescale GPMI NAND Flash Driver
>> *
>> - * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
>> + * Copyright (C) 2010-2015 Freescale Semiconductor, Inc.
>> * Copyright (C) 2008 Embedded Alley Solutions, Inc.
>> *
>> * This program is free software; you can redistribute it and/or modify
>> @@ -123,7 +123,8 @@ enum gpmi_type {
>> IS_MX23,
>> IS_MX28,
>> IS_MX6Q,
>> - IS_MX6SX
>> + IS_MX6SX,
>> + IS_MX7D
>> };
>>
>> struct gpmi_devdata {
>> @@ -306,6 +307,8 @@ void gpmi_copy_bits(u8 *dst, size_t dst_bit_off,
>> #define GPMI_IS_MX28(x) ((x)->devdata->type == IS_MX28)
>> #define GPMI_IS_MX6Q(x) ((x)->devdata->type == IS_MX6Q)
>> #define GPMI_IS_MX6SX(x) ((x)->devdata->type == IS_MX6SX)
>> +#define GPMI_IS_MX7D(x) ((x)->devdata->type == IS_MX7D)
>>
>> #define GPMI_IS_MX6(x) (GPMI_IS_MX6Q(x) || GPMI_IS_MX6SX(x))
>> +#define GPMI_IS_MX7(x) (GPMI_IS_MX7D(x))
>> #endif
>> --
>> 1.9.1
>>
>
>
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