From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SwsMq-0002Ol-Ew for barebox@lists.infradead.org; Thu, 02 Aug 2012 10:11:04 +0000 From: Sascha Hauer Date: Thu, 2 Aug 2012 12:10:16 +0200 Message-Id: <1343902216-13262-6-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1343902216-13262-1-git-send-email-s.hauer@pengutronix.de> References: <1343902216-13262-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 5/5] mtd OMAP NAND: implement buswidth autodetection support To: barebox@lists.infradead.org Signed-off-by: Sascha Hauer --- drivers/mtd/nand/nand_omap_gpmc.c | 44 ++++++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 13 deletions(-) diff --git a/drivers/mtd/nand/nand_omap_gpmc.c b/drivers/mtd/nand/nand_omap_gpmc.c index 39b4dd9..fa6074f 100644 --- a/drivers/mtd/nand/nand_omap_gpmc.c +++ b/drivers/mtd/nand/nand_omap_gpmc.c @@ -879,6 +879,20 @@ static int omap_gpmc_eccmode_set(struct device_d *dev, struct param_d *param, co return omap_gpmc_eccmode(oinfo, i); } +static int gpmc_set_buswidth(struct mtd_info *mtd, struct nand_chip *chip, int buswidth) +{ + struct gpmc_nand_info *oinfo = chip->priv; + + if (buswidth == NAND_BUSWIDTH_16) + oinfo->pdata->nand_cfg->cfg[0] |= 0x00001000; + else + oinfo->pdata->nand_cfg->cfg[0] &= ~0x00001000; + + gpmc_cs_config(oinfo->pdata->cs, oinfo->pdata->nand_cfg); + + return 0; +} + /** * @brief nand device probe. * @@ -934,10 +948,18 @@ static int gpmc_nand_probe(struct device_d *pdev) oinfo->gpmc_base, oinfo->gpmc_command, oinfo->gpmc_address, oinfo->gpmc_data, cs_base); - /* If we are 16 bit dev, our gpmc config tells us that */ - if ((readl(cs_base) & 0x3000) == 0x1000) { - dev_dbg(pdev, "16 bit dev\n"); + switch (pdata->device_width) { + case 0: + printk("probe buswidth\n"); + nand->options |= NAND_BUSWIDTH_AUTO; + break; + case 8: + break; + case 16: nand->options |= NAND_BUSWIDTH_16; + break; + default: + return -EINVAL; } /* Same data register for in and out */ @@ -977,6 +999,8 @@ static int gpmc_nand_probe(struct device_d *pdev) nand->options |= NAND_OWN_BUFFERS; nand->buffers = xzalloc(sizeof(*nand->buffers)); + nand->set_buswidth = gpmc_set_buswidth; + /* State my controller */ nand->controller = &oinfo->controller; @@ -1004,18 +1028,12 @@ static int gpmc_nand_probe(struct device_d *pdev) goto out_release_mem; } - switch (pdata->device_width) { - case 8: - lsp = &ecc_sp_x8; - llp = &ecc_lp_x8; - break; - case 16: + if (nand->options & NAND_BUSWIDTH_16) { lsp = &ecc_sp_x16; llp = &ecc_lp_x16; - break; - default: - err = -EINVAL; - goto out_release_mem; + } else { + lsp = &ecc_sp_x8; + llp = &ecc_lp_x8; } switch (minfo->writesize) { -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox