Re: [PATCH 1/5] mtd: nand: gpmi: add GPMI NAND support for i.MX7D

Boris Brezillon
2016-04-29T09:02:23Z

On Tue, 23 Feb 2016 17:04:49 -0600
Han Xu <han.xu@nxp.com> wrote:

> From: Han Xu <b45815@freescale.com>
>
> support GPMI NAND on i.MX7D
>
> Signed-off-by: Han Xu <b45815@freescale.com>
> ---
> 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 | 27 ++++++++++++++++++++++-----
> drivers/mtd/nand/gpmi-nand/gpmi-nand.h | 7 +++++--
> 4 files changed, 40 insertions(+), 18 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)) \
> ? (((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))\

Missing tab at the end of the line ") \"

> ? (((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))\

Ditto.

> ? (((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 0f68a99..8acbe04 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) {

Align this to the open parenthesis.

> 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)) {

Ditto.

> /*
> * 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 8122c69..1aba6e6 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.
> *
> @@ -1868,8 +1880,8 @@ 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) &&
> - ((bch_geo->gf_len * bch_geo->ecc_strength) % 8) == 0) {
> + if ((GPMI_IS_MX6(this) || GPMI_IS_MX7(this)) &&
> + ((bch_geo->gf_len * bch_geo->ecc_strength) % 8) == 0) {

Why did you add a tab on the seconf line of the test?

Please try to keep everything aligned on the open parenthesis. The
only exception to this rule should be when your line exceed 80
characters.

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;
> }
> @@ -1934,7 +1946,8 @@ 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);

Ditto:

ret = nand_scan_ident(mtd,
(GPMI_IS_MX6(this) ||
GPMI_IS_MX7(this)) ? 2 : 1,
NULL);

or even better

max_chips = (GPMI_IS_MX6(this) || GPMI_IS_MX7(this)) ? 2 : 1;
ret = nand_scan_ident(mtd, max_chips, NULL);

> if (ret)
> goto err_out;
>
> @@ -1977,7 +1990,11 @@ 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,

Drop the (void *) cast.

--
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering