| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <55AAF64D.4040201@vanguardiasur.com.ar>
Date: Sat, 18 Jul 2015 21:58:53 -0300
From: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To: Antoine Tenart <antoine.tenart@...e-electrons.com>,
sebastian.hesselbarth@...il.com, dwmw2@...radead.org,
computersforpeace@...il.com
Cc: boris.brezillon@...e-electrons.com, zmxu@...vell.com,
jszhang@...vell.com, linux-arm-kernel@...ts.infradead.org,
linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: Re: [PATCH v2 3/4] mtd: pxa3xx_nand: rework flash detection and
timing setup
On 07/07/2015 12:08 PM, Antoine Tenart wrote:
> Rework the pxa3xx_nand driver to allow using functions exported by the
> nand framework to detect the flash and the timings. Then setup the
> timings using the helpers previously added.
>
> Signed-off-by: Antoine Tenart <antoine.tenart@...e-electrons.com>
> ---
> drivers/mtd/nand/pxa3xx_nand.c | 137 ++++++++++++-----------------------------
> 1 file changed, 38 insertions(+), 99 deletions(-)
>
> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
> index 9a95c24ab2ce..513f8f6069f0 100644
> --- a/drivers/mtd/nand/pxa3xx_nand.c
> +++ b/drivers/mtd/nand/pxa3xx_nand.c
> @@ -1320,48 +1320,16 @@ static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
> return NAND_STATUS_READY;
> }
>
> -static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
> - const struct pxa3xx_nand_flash *f)
> +static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info)
> {
> - struct platform_device *pdev = info->pdev;
> - struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
> struct pxa3xx_nand_host *host = info->host[info->cs];
> - uint32_t ndcr = 0x0; /* enable all interrupts */
> -
> - if (f->page_size != 2048 && f->page_size != 512) {
> - dev_err(&pdev->dev, "Current only support 2048 and 512 size\n");
> - return -EINVAL;
> - }
> -
> - if (f->flash_width != 16 && f->flash_width != 8) {
> - dev_err(&pdev->dev, "Only support 8bit and 16 bit!\n");
> - return -EINVAL;
> - }
> -
> - /* calculate flash information */
> - host->read_id_bytes = (f->page_size == 2048) ? 4 : 2;
> -
> - /* calculate addressing information */
> - host->col_addr_cycles = (f->page_size == 2048) ? 2 : 1;
> -
> - if (f->num_blocks * f->page_per_block > 65536)
> - host->row_addr_cycles = 3;
> - else
> - host->row_addr_cycles = 2;
> -
> - ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
> - ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0;
> - ndcr |= (f->page_per_block == 64) ? NDCR_PG_PER_BLK : 0;
> - ndcr |= (f->page_size == 2048) ? NDCR_PAGE_SZ : 0;
> - ndcr |= (f->flash_width == 16) ? NDCR_DWIDTH_M : 0;
> - ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0;
> -
> - ndcr |= NDCR_RD_ID_CNT(host->read_id_bytes);
> - ndcr |= NDCR_SPARE_EN; /* enable spare by default */
> + struct mtd_info *mtd = host->mtd;
> + struct nand_chip *chip = mtd->priv;
>
> - info->reg_ndcr = ndcr;
> + info->reg_ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0;
> + info->reg_ndcr |= (chip->page_shift == 6) ? NDCR_PG_PER_BLK : 0;
> + info->reg_ndcr |= (mtd->writesize == 2048) ? NDCR_PAGE_SZ : 0;
>
> - pxa3xx_nand_set_timing(host, f->timing);
> return 0;
> }
>
> @@ -1456,19 +1424,31 @@ static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info)
> }
> #endif
>
> -static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info)
> +static int pxa3xx_nand_sensing(struct pxa3xx_nand_host *host)
> {
> + struct pxa3xx_nand_info *info = host->info_data;
> + struct platform_device *pdev = info->pdev;
> + struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
> struct mtd_info *mtd;
> struct nand_chip *chip;
> + const struct nand_sdr_timings *timings;
> int ret;
>
> mtd = info->host[info->cs]->mtd;
> chip = mtd->priv;
>
> + /* configure default flash values */
> + info->reg_ndcr = 0x0; /* enable all interrupts */
> + info->reg_ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
> + info->reg_ndcr |= NDCR_RD_ID_CNT(host->read_id_bytes);
> + info->reg_ndcr |= NDCR_SPARE_EN; /* enable spare by default */
> +
> /* use the common timing to make a try */
> - ret = pxa3xx_nand_config_flash(info, &builtin_flash_types[0]);
> - if (ret)
> - return ret;
> + timings = onfi_async_timing_mode_to_sdr_timings(0);
> + if (IS_ERR(timings))
> + return PTR_ERR(timings);
> +
> + pxa3xx_nand_set_sdr_timing(host, timings);
>
> chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0);
> ret = chip->waitfunc(mtd, chip);
> @@ -1553,12 +1533,8 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
> struct pxa3xx_nand_info *info = host->info_data;
> struct platform_device *pdev = info->pdev;
> struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
> - struct nand_flash_dev pxa3xx_flash_ids[2], *def = NULL;
> - const struct pxa3xx_nand_flash *f = NULL;
> struct nand_chip *chip = mtd->priv;
> - uint32_t id = -1;
> - uint64_t chipsize;
> - int i, ret, num;
> + int ret;
> uint16_t ecc_strength, ecc_step;
>
> if (pdata->keep_config && !pxa3xx_nand_detect_config(info))
> @@ -1567,7 +1543,7 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
> /* Set a default chunk size */
> info->chunk_size = 512;
>
> - ret = pxa3xx_nand_sensing(info);
> + ret = pxa3xx_nand_sensing(host);
> if (ret) {
> dev_info(&info->pdev->dev, "There is no chip on cs %d!\n",
> info->cs);
> @@ -1575,64 +1551,26 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd)
> return ret;
> }
>
> - chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0);
> - id = *((uint16_t *)(info->data_buff));
> - if (id != 0)
> - dev_info(&info->pdev->dev, "Detect a flash id %x\n", id);
> - else {
> - dev_warn(&info->pdev->dev,
> - "Read out ID 0, potential timing set wrong!!\n");
> -
> - return -EINVAL;
> - }
> -
> - num = ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1;
> - for (i = 0; i < num; i++) {
> - if (i < pdata->num_flash)
> - f = pdata->flash + i;
> - else
> - f = &builtin_flash_types[i - pdata->num_flash + 1];
> -
> - /* find the chip in default list */
> - if (f->chip_id == id)
> - break;
> - }
> -
> - if (i >= (ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1)) {
> - dev_err(&info->pdev->dev, "ERROR!! flash not defined!!!\n");
> -
> - return -EINVAL;
> - }
> -
> - ret = pxa3xx_nand_config_flash(info, f);
> - if (ret) {
> - dev_err(&info->pdev->dev, "ERROR! Configure failed\n");
> - return ret;
> - }
> -
> - memset(pxa3xx_flash_ids, 0, sizeof(pxa3xx_flash_ids));
> -
> - pxa3xx_flash_ids[0].name = f->name;
> - pxa3xx_flash_ids[0].dev_id = (f->chip_id >> 8) & 0xffff;
> - pxa3xx_flash_ids[0].pagesize = f->page_size;
> - chipsize = (uint64_t)f->num_blocks * f->page_per_block * f->page_size;
> - pxa3xx_flash_ids[0].chipsize = chipsize >> 20;
> - pxa3xx_flash_ids[0].erasesize = f->page_size * f->page_per_block;
> - if (f->flash_width == 16)
> - pxa3xx_flash_ids[0].options = NAND_BUSWIDTH_16;
> - pxa3xx_flash_ids[1].name = NULL;
> - def = pxa3xx_flash_ids;
> KEEP_CONFIG:
Hm...
> - if (info->reg_ndcr & NDCR_DWIDTH_M)
> - chip->options |= NAND_BUSWIDTH_16;
> -
...can't see why this removal is needed. AFAICS, it removes
support for 16-bit devices (only supported when using keep-config).
> /* Device detection must be done with ECC disabled */
> if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
> nand_writel(info, NDECCCTRL, 0x0);
>
> - if (nand_scan_ident(mtd, 1, def))
> + if (nand_scan_ident(mtd, 1, NULL))
> return -ENODEV;
>
> + if (!pdata->keep_config) {
> + ret = pxa3xx_nand_init_timings(host);
> + if (ret) {
> + dev_err(&info->pdev->dev, "Failed to set timings: %d\n", ret);
> + return ret;
> + }
> + }
> +
> + ret = pxa3xx_nand_config_flash(info);
> + if (ret)
> + return ret;
> +
> if (pdata->flash_bbt) {
> /*
> * We'll use a bad block table stored in-flash and don't
> @@ -1729,6 +1667,7 @@ static int alloc_nand_resource(struct platform_device *pdev)
> host->mtd = mtd;
> host->cs = cs;
> host->info_data = info;
> + host->read_id_bytes = 4;
> mtd->priv = host;
> mtd->owner = THIS_MODULE;
>
>
--
Ezequiel Garcia, VanguardiaSur
www.vanguardiasur.com.ar
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists