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 4.80.1 #2 (Red Hat Linux)) id 1V1DLz-0004RJ-UI for barebox@lists.infradead.org; Mon, 22 Jul 2013 10:28:33 +0000 From: Sascha Hauer Date: Mon, 22 Jul 2013 12:28:04 +0200 Message-Id: <1374488885-25488-1-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" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/2] mtd: nand: mxs-nand: Add i.MX6 support To: barebox@lists.infradead.org The i.MX6 uses the same GPMI NAND controller as i.MX23/28 do. This adds i.MX6 support to the driver. Signed-off-by: Sascha Hauer --- arch/arm/mach-imx/clk-imx6.c | 1 + arch/arm/mach-imx/include/mach/imx6-regs.h | 2 + drivers/dma/Kconfig | 2 +- drivers/mtd/nand/Kconfig | 2 +- drivers/mtd/nand/nand_mxs.c | 102 ++++++++++++++++++++++------- 5 files changed, 85 insertions(+), 24 deletions(-) diff --git a/arch/arm/mach-imx/clk-imx6.c b/arch/arm/mach-imx/clk-imx6.c index 3061779..4639c0b 100644 --- a/arch/arm/mach-imx/clk-imx6.c +++ b/arch/arm/mach-imx/clk-imx6.c @@ -303,6 +303,7 @@ static int imx6_ccm_probe(struct device_d *dev) clkdev_add_physbase(clks[ahb], MX6_SATA_BASE_ADDR, NULL); clkdev_add_physbase(clks[usbphy1], MX6_USBPHY1_BASE_ADDR, NULL); clkdev_add_physbase(clks[usbphy2], MX6_USBPHY2_BASE_ADDR, NULL); + clkdev_add_physbase(clks[enfc_podf], MX6_GPMI_BASE_ADDR, NULL); writel(0xffffffff, ccm_base + CCGR0); writel(0xffffffff, ccm_base + CCGR1); diff --git a/arch/arm/mach-imx/include/mach/imx6-regs.h b/arch/arm/mach-imx/include/mach/imx6-regs.h index d947aa6..833280a 100644 --- a/arch/arm/mach-imx/include/mach/imx6-regs.h +++ b/arch/arm/mach-imx/include/mach/imx6-regs.h @@ -1,6 +1,8 @@ #ifndef __MACH_IMX6_REGS_H #define __MACH_IMX6_REGS_H +#define MX6_GPMI_BASE_ADDR 0x00112000 + #define MX6_AIPS1_ARB_BASE_ADDR 0x02000000 #define MX6_AIPS2_ARB_BASE_ADDR 0x02100000 diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index c43c93e..c75fc8b 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -2,7 +2,7 @@ menu "DMA support" config MXS_APBH_DMA tristate "MXS APBH DMA ENGINE" - depends on ARCH_IMX23 || ARCH_IMX28 + depends on ARCH_IMX23 || ARCH_IMX28 || ARCH_IMX6 select STMP_DEVICE help Experimental! diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index de7b03f..04fe3c8 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -80,7 +80,7 @@ config NAND_IMX_BBM config NAND_MXS bool select NAND_BBT - prompt "i.MX23/28 NAND driver" + prompt "i.MX23/28/6 NAND driver" depends on MXS_APBH_DMA config NAND_OMAP_GPMC diff --git a/drivers/mtd/nand/nand_mxs.c b/drivers/mtd/nand/nand_mxs.c index 20c61bb..68eb040 100644 --- a/drivers/mtd/nand/nand_mxs.c +++ b/drivers/mtd/nand/nand_mxs.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -121,12 +122,14 @@ #define BCH_FLASHLAYOUT0_META_SIZE_OFFSET 16 #define BCH_FLASHLAYOUT0_ECC0_MASK (0xf << 12) #define BCH_FLASHLAYOUT0_ECC0_OFFSET 12 +#define IMX6_BCH_FLASHLAYOUT0_ECC0_OFFSET 11 #define BCH_FLASH0LAYOUT1 0x00000090 #define BCH_FLASHLAYOUT1_PAGE_SIZE_MASK (0xffff << 16) #define BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET 16 #define BCH_FLASHLAYOUT1_ECCN_MASK (0xf << 12) #define BCH_FLASHLAYOUT1_ECCN_OFFSET 12 +#define IMX6_BCH_FLASHLAYOUT1_ECCN_OFFSET 11 #define MXS_NAND_DMA_DESCRIPTOR_COUNT 4 @@ -137,12 +140,19 @@ #define MXS_NAND_BCH_TIMEOUT 10000 +enum gpmi_type { + GPMI_MXS, + GPMI_IMX6, +}; + struct mxs_nand_info { struct nand_chip nand_chip; void __iomem *io_base; void __iomem *bch_base; struct clk *clk; struct mtd_info mtd; + enum gpmi_type type; + int dma_channel_base; u32 version; int cur_chip; @@ -171,6 +181,11 @@ struct mxs_nand_info { struct nand_ecclayout fake_ecc_layout; +static inline int mxs_nand_is_imx6(struct mxs_nand_info *info) +{ + return info->type == GPMI_IMX6; +} + static struct mxs_dma_desc *mxs_nand_get_dma_desc(struct mxs_nand_info *info) { struct mxs_dma_desc *desc; @@ -332,7 +347,7 @@ static void mxs_nand_cmd_ctrl(struct mtd_info *mtd, int data, unsigned int ctrl) struct nand_chip *nand = mtd->priv; struct mxs_nand_info *nand_info = nand->priv; struct mxs_dma_desc *d; - uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip; + uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip; int ret; /* @@ -485,7 +500,7 @@ static void mxs_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int length) struct nand_chip *nand = mtd->priv; struct mxs_nand_info *nand_info = nand->priv; struct mxs_dma_desc *d; - uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip; + uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip; int ret; if (length > NAND_MAX_PAGESIZE) { @@ -563,7 +578,7 @@ static void mxs_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, struct nand_chip *nand = mtd->priv; struct mxs_nand_info *nand_info = nand->priv; struct mxs_dma_desc *d; - uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip; + uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip; int ret; if (length > NAND_MAX_PAGESIZE) { @@ -623,7 +638,7 @@ static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand, { struct mxs_nand_info *nand_info = nand->priv; struct mxs_dma_desc *d; - uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip; + uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip; uint32_t corrected = 0, failed = 0; uint8_t *status; int i, ret; @@ -767,7 +782,7 @@ static int mxs_nand_ecc_write_page(struct mtd_info *mtd, { struct mxs_nand_info *nand_info = nand->priv; struct mxs_dma_desc *d; - uint32_t channel = MXS_DMA_CHANNEL_AHB_APBH_GPMI0 + nand_info->cur_chip; + uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip; int ret = 0; memcpy(nand_info->data_buf, buf, mtd->writesize); @@ -1043,7 +1058,7 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd) struct nand_chip *nand = mtd->priv; struct mxs_nand_info *nand_info = nand->priv; void __iomem *bch_regs = nand_info->bch_base; - uint32_t tmp; + uint32_t layout0, layout1; int ret; /* Reset BCH. Don't use SFTRST on MX23 due to Errata #2847 */ @@ -1052,21 +1067,36 @@ static int mxs_nand_scan_bbt(struct mtd_info *mtd) if (ret) return ret; - /* Configure layout 0 */ - tmp = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1) - << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET; - tmp |= MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET; - tmp |= (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) - << BCH_FLASHLAYOUT0_ECC0_OFFSET; - tmp |= MXS_NAND_CHUNK_DATA_CHUNK_SIZE; - writel(tmp, bch_regs + BCH_FLASH0LAYOUT0); - - tmp = (mtd->writesize + mtd->oobsize) - << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET; - tmp |= (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) - << BCH_FLASHLAYOUT1_ECCN_OFFSET; - tmp |= MXS_NAND_CHUNK_DATA_CHUNK_SIZE; - writel(tmp, bch_regs + BCH_FLASH0LAYOUT1); + if (mxs_nand_is_imx6(nand_info)) { + layout0 = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1) + << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET | + MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET | + (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) + << IMX6_BCH_FLASHLAYOUT0_ECC0_OFFSET | + MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2; + + layout1 = (mtd->writesize + mtd->oobsize) + << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET | + (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) + << IMX6_BCH_FLASHLAYOUT1_ECCN_OFFSET | + MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2; + } else { + layout0 = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1) + << BCH_FLASHLAYOUT0_NBLOCKS_OFFSET | + MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET | + (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) + << BCH_FLASHLAYOUT0_ECC0_OFFSET | + MXS_NAND_CHUNK_DATA_CHUNK_SIZE; + + layout1 = (mtd->writesize + mtd->oobsize) + << BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET | + (mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1) + << BCH_FLASHLAYOUT1_ECCN_OFFSET | + MXS_NAND_CHUNK_DATA_CHUNK_SIZE; + } + + writel(layout0, bch_regs + BCH_FLASH0LAYOUT0); + writel(layout1, bch_regs + BCH_FLASH0LAYOUT1); /* Set *all* chip selects to use layout 0 */ writel(0, bch_regs + BCH_LAYOUTSELECT); @@ -1189,14 +1219,20 @@ static int mxs_nand_probe(struct device_d *dev) struct mxs_nand_info *nand_info; struct nand_chip *nand; struct mtd_info *mtd; + enum gpmi_type type; int err; + err = dev_get_drvdata(dev, (unsigned long *)&type); + if (err) + type = GPMI_MXS; + nand_info = kzalloc(sizeof(struct mxs_nand_info), GFP_KERNEL); if (!nand_info) { printf("MXS NAND: Failed to allocate private data\n"); return -ENOMEM; } + nand_info->type = type; nand_info->io_base = dev_request_mem_region(dev, 0); nand_info->bch_base = dev_request_mem_region(dev, 1); @@ -1204,7 +1240,13 @@ static int mxs_nand_probe(struct device_d *dev) if (IS_ERR(nand_info->clk)) return PTR_ERR(nand_info->clk); - clk_enable(nand_info->clk); + if (mxs_nand_is_imx6(nand_info)) { + clk_set_rate(nand_info->clk, 96000000); + clk_enable(nand_info->clk); + nand_info->dma_channel_base = 0; + } else { + nand_info->dma_channel_base = MXS_DMA_CHANNEL_AHB_APBH_GPMI0; + } err = mxs_nand_alloc_buffers(nand_info); if (err) @@ -1268,9 +1310,25 @@ err1: return err; } +static __maybe_unused struct of_device_id gpmi_dt_ids[] = { + { + .compatible = "fsl,imx23-gpmi-nand", + .data = GPMI_MXS, + }, { + .compatible = "fsl,imx28-gpmi-nand", + .data = GPMI_MXS, + }, { + .compatible = "fsl,imx6q-gpmi-nand", + .data = GPMI_IMX6, + }, { + /* sentinel */ + } +}; + static struct driver_d mxs_nand_driver = { .name = "mxs_nand", .probe = mxs_nand_probe, + .of_compatible = DRV_OF_COMPAT(gpmi_dt_ids), }; device_platform_driver(mxs_nand_driver); -- 1.8.3.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox