[PATCH] mtd: sh_flctl SHBUSSEL and SEL_16BIT support

[PATCH] mtd: sh_flctl SHBUSSEL and SEL_16BIT support

[Magnus Damm]

From: Magnus Damm <damm@opensource.se>

This patch extends the sh_flctl driver with support
for 16-bit bus configuration using SEL_16BIT and
support for multiplexed pins using SHBUSSEL.

Signed-off-by: Magnus Damm <damm@opensource.se>
---

 drivers/mtd/nand/sh_flctl.c  |   27 ++++++++++++++++++++++++++-
 include/linux/mtd/sh_flctl.h |    2 ++
 2 files changed, 28 insertions(+), 1 deletion(-)

--- 0015/drivers/mtd/nand/sh_flctl.c
+++ work/drivers/mtd/nand/sh_flctl.c	2010-01-26 23:25:33.000000000 +0900
@@ -105,6 +105,8 @@ static void set_addr(struct mtd_info *mt
 		addr = page_addr;	/* ERASE1 */
 	} else if (page_addr != -1) {
 		/* SEQIN, READ0, etc.. */
+		if (flctl->chip.options & NAND_BUSWIDTH_16)
+			column >>= 1;
 		if (flctl->page_size) {
 			addr = column & 0x0FFF;
 			addr |= (page_addr & 0xff) << 16;
@@ -280,7 +282,7 @@ static void write_fiforeg(struct sh_flct
 static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_val)
 {
 	struct sh_flctl *flctl = mtd_to_flctl(mtd);
-	uint32_t flcmncr_val = readl(FLCMNCR(flctl));
+	uint32_t flcmncr_val = readl(FLCMNCR(flctl)) & ~SEL_16BIT;
 	uint32_t flcmdcr_val, addr_len_bytes = 0;
 
 	/* Set SNAND bit if page size is 2048byte */
@@ -302,6 +304,8 @@ static void set_cmd_regs(struct mtd_info
 	case NAND_CMD_READOOB:
 		addr_len_bytes = flctl->rw_ADRCNT;
 		flcmdcr_val |= CDSRC_E;
+		if (flctl->chip.options & NAND_BUSWIDTH_16)
+			flcmncr_val |= SEL_16BIT;
 		break;
 	case NAND_CMD_SEQIN:
 		/* This case is that cmd is READ0 or READ1 or READ00 */
@@ -310,6 +314,8 @@ static void set_cmd_regs(struct mtd_info
 	case NAND_CMD_PAGEPROG:
 		addr_len_bytes = flctl->rw_ADRCNT;
 		flcmdcr_val |= DOCMD2_E | CDSRC_E | SELRW;
+		if (flctl->chip.options & NAND_BUSWIDTH_16)
+			flcmncr_val |= SEL_16BIT;
 		break;
 	case NAND_CMD_READID:
 		flcmncr_val &= ~SNAND_E;
@@ -528,6 +534,8 @@ static void flctl_cmdfunc(struct mtd_inf
 		set_addr(mtd, 0, page_addr);
 
 		flctl->read_bytes = mtd->writesize + mtd->oobsize;
+		if (flctl->chip.options & NAND_BUSWIDTH_16)
+			column >>= 1;
 		flctl->index += column;
 		goto read_normal_exit;
 
@@ -691,6 +699,18 @@ static uint8_t flctl_read_byte(struct mt
 	return data;
 }
 
+static uint16_t flctl_read_word(struct mtd_info *mtd)
+{
+       struct sh_flctl *flctl = mtd_to_flctl(mtd);
+       int index = flctl->index;
+       uint16_t data;
+       uint16_t *buf = (uint16_t *)&flctl->done_buff[index];
+
+       data = *buf;
+       flctl->index += 2;
+       return data;
+}
+
 static void flctl_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
 {
 	int i;
@@ -829,6 +849,11 @@ static int __devinit flctl_probe(struct 
 	nand->select_chip = flctl_select_chip;
 	nand->cmdfunc = flctl_cmdfunc;
 
+	if (pdata->flcmncr_val & SEL_16BIT) {
+		nand->options |= NAND_BUSWIDTH_16;
+		nand->read_word = flctl_read_word;
+	}
+
 	ret = nand_scan_ident(flctl_mtd, 1);
 	if (ret)
 		goto err;
--- 0015/include/linux/mtd/sh_flctl.h
+++ work/include/linux/mtd/sh_flctl.h	2010-01-26 22:54:42.000000000 +0900
@@ -51,6 +51,8 @@
 #define _4ECCCNTEN	(0x1 << 24)
 #define _4ECCEN		(0x1 << 23)
 #define _4ECCCORRECT	(0x1 << 22)
+#define SHBUSSEL	(0x1 << 20)
+#define SEL_16BIT	(0x1 << 19)
 #define SNAND_E		(0x1 << 18)	/* SNAND (0Q2 1 48)*/
 #define QTSEL_E		(0x1 << 17)
 #define ENDIAN		(0x1 << 16)	/* 1 = little endian */

Re: [PATCH] mtd: sh_flctl SHBUSSEL and SEL_16BIT support

[Yoshihiro Shimoda]

Magnus Damm wrote:
> From: Magnus Damm <damm@opensource.se>
> 
> This patch extends the sh_flctl driver with support
> for 16-bit bus configuration using SEL_16BIT and
> support for multiplexed pins using SHBUSSEL.
> 

Thank you very much for your patch again!

Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>

Thanks,
Yoshihiro Shimoda

[PATCH] mtd: trivial sh_flctl changes

[Magnus Damm]

From: Magnus Damm <damm@opensource.se>

This patch contains a few changes for the sh_flctl driver:
 - not sh7723-only driver - get rid of kconfig dependency
 - use dev_err() instead of printk()
 - use __devinit and __devexit for probe()/remove()
 - fix probe() return values

Signed-off-by: Magnus Damm <damm@opensource.se>
---

 drivers/mtd/nand/Kconfig     |    4 ++--
 drivers/mtd/nand/sh_flctl.c  |   40 ++++++++++++++++++++++------------------
 include/linux/mtd/sh_flctl.h |    1 +
 3 files changed, 25 insertions(+), 20 deletions(-)

--- 0001/drivers/mtd/nand/Kconfig
+++ work/drivers/mtd/nand/Kconfig	2010-01-26 22:11:20.000000000 +0900
@@ -451,10 +451,10 @@ config MTD_NAND_NOMADIK
 
 config MTD_NAND_SH_FLCTL
 	tristate "Support for NAND on Renesas SuperH FLCTL"
-	depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723
+	depends on MTD_NAND && SUPERH
 	help
 	  Several Renesas SuperH CPU has FLCTL. This option enables support
-	  for NAND Flash using FLCTL. This driver support SH7723.
+	  for NAND Flash using FLCTL.
 
 config MTD_NAND_DAVINCI
         tristate "Support NAND on DaVinci SoC"
--- 0001/drivers/mtd/nand/sh_flctl.c
+++ work/drivers/mtd/nand/sh_flctl.c	2010-01-27 17:43:42.000000000 +0900
@@ -1,10 +1,10 @@
 /*
  * SuperH FLCTL nand controller
  *
- * Copyright © 2008 Renesas Solutions Corp.
- * Copyright © 2008 Atom Create Engineering Co., Ltd.
+ * Copyright (c) 2008 Renesas Solutions Corp.
+ * Copyright (c) 2008 Atom Create Engineering Co., Ltd.
  *
- * Based on fsl_elbc_nand.c, Copyright © 2006-2007 Freescale Semiconductor
+ * Based on fsl_elbc_nand.c, Copyright (c) 2006-2007 Freescale Semiconductor
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -75,6 +75,11 @@ static void start_translation(struct sh_
 	writeb(TRSTRT, FLTRCR(flctl));
 }
 
+static void timeout_error(struct sh_flctl *flctl, const char *str)
+{
+	dev_err(&flctl->pdev->dev, "Timeout occured in %s\n", str);
+}
+
 static void wait_completion(struct sh_flctl *flctl)
 {
 	uint32_t timeout = LOOP_TIMEOUT_MAX;
@@ -87,7 +92,7 @@ static void wait_completion(struct sh_fl
 		udelay(1);
 	}
 
-	printk(KERN_ERR "wait_completion(): Timeout occured \n");
+	timeout_error(flctl, __func__);
 	writeb(0x0, FLTRCR(flctl));
 }
 
@@ -132,7 +137,7 @@ static void wait_rfifo_ready(struct sh_f
 			return;
 		udelay(1);
 	}
-	printk(KERN_ERR "wait_rfifo_ready(): Timeout occured \n");
+	timeout_error(flctl, __func__);
 }
 
 static void wait_wfifo_ready(struct sh_flctl *flctl)
@@ -146,7 +151,7 @@ static void wait_wfifo_ready(struct sh_f
 			return;
 		udelay(1);
 	}
-	printk(KERN_ERR "wait_wfifo_ready(): Timeout occured \n");
+	timeout_error(flctl, __func__);
 }
 
 static int wait_recfifo_ready(struct sh_flctl *flctl, int sector_number)
@@ -198,7 +203,7 @@ static int wait_recfifo_ready(struct sh_
 		writel(0, FL4ECCCR(flctl));
 	}
 
-	printk(KERN_ERR "wait_recfifo_ready(): Timeout occured \n");
+	timeout_error(flctl, __func__);
 	return 1;	/* timeout */
 }
 
@@ -214,7 +219,7 @@ static void wait_wecfifo_ready(struct sh
 			return;
 		udelay(1);
 	}
-	printk(KERN_ERR "wait_wecfifo_ready(): Timeout occured \n");
+	timeout_error(flctl, __func__);
 }
 
 static void read_datareg(struct sh_flctl *flctl, int offset)
@@ -769,38 +774,36 @@ static int flctl_chip_init_tail(struct m
 	return 0;
 }
 
-static int __init flctl_probe(struct platform_device *pdev)
+static int __devinit flctl_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct sh_flctl *flctl;
 	struct mtd_info *flctl_mtd;
 	struct nand_chip *nand;
 	struct sh_flctl_platform_data *pdata;
-	int ret;
+	int ret = -ENXIO;
 
 	pdata = pdev->dev.platform_data;
 	if (pdata = NULL) {
-		printk(KERN_ERR "sh_flctl platform_data not found.\n");
-		return -ENODEV;
+		dev_err(&pdev->dev, "no platform data defined\n");
+		return -EINVAL;
 	}
 
 	flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL);
 	if (!flctl) {
-		printk(KERN_ERR "Unable to allocate NAND MTD dev structure.\n");
+		dev_err(&pdev->dev, "failed to allocate driver data\n");
 		return -ENOMEM;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
-		printk(KERN_ERR "%s: resource not found.\n", __func__);
-		ret = -ENODEV;
+		dev_err(&pdev->dev, "failed to get I/O memory\n");
 		goto err;
 	}
 
 	flctl->reg = ioremap(res->start, resource_size(res));
 	if (flctl->reg = NULL) {
-		printk(KERN_ERR "%s: ioremap error.\n", __func__);
-		ret = -ENOMEM;
+		dev_err(&pdev->dev, "failed to remap I/O memory\n");
 		goto err;
 	}
 
@@ -808,6 +811,7 @@ static int __init flctl_probe(struct pla
 	flctl_mtd = &flctl->mtd;
 	nand = &flctl->chip;
 	flctl_mtd->priv = nand;
+	flctl->pdev = pdev;
 	flctl->hwecc = pdata->has_hwecc;
 
 	flctl_register_init(flctl, pdata->flcmncr_val);
@@ -846,7 +850,7 @@ err:
 	return ret;
 }
 
-static int __exit flctl_remove(struct platform_device *pdev)
+static int __devexit flctl_remove(struct platform_device *pdev)
 {
 	struct sh_flctl *flctl = platform_get_drvdata(pdev);
 
--- 0001/include/linux/mtd/sh_flctl.h
+++ work/include/linux/mtd/sh_flctl.h	2010-01-26 22:11:20.000000000 +0900
@@ -96,6 +96,7 @@
 struct sh_flctl {
 	struct mtd_info		mtd;
 	struct nand_chip	chip;
+	struct platform_device	*pdev;
 	void __iomem		*reg;
 
 	uint8_t	done_buff[2048 + 64];	/* max size 2048 + 64 */

Re: [PATCH] mtd: trivial sh_flctl changes

[Yoshihiro Shimoda]

Magnus Damm wrote:
> From: Magnus Damm <damm@opensource.se>
> 
> This patch contains a few changes for the sh_flctl driver:
>  - not sh7723-only driver - get rid of kconfig dependency
>  - use dev_err() instead of printk()
>  - use __devinit and __devexit for probe()/remove()
>  - fix probe() return values
> 

Thank you for your patch.

Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>

Thanks,
Yoshihiro Shimoda

Re: [PATCH] mtd: trivial sh_flctl changes

[Paul Mundt]

On Mon, Feb 01, 2010 at 07:59:40PM +0900, Yoshihiro Shimoda wrote:
> Magnus Damm wrote:
> > This patch contains a few changes for the sh_flctl driver:
> >  - not sh7723-only driver - get rid of kconfig dependency
> >  - use dev_err() instead of printk()
> >  - use __devinit and __devexit for probe()/remove()
> >  - fix probe() return values
> 
> Thank you for your patch.
> 
> Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>

On Mon, Feb 01, 2010 at 08:00:28PM +0900, Yoshihiro Shimoda wrote:
> Magnus Damm wrote:
> > This patch extends the sh_flctl driver with support
> > for 16-bit bus configuration using SEL_16BIT and
> > support for multiplexed pins using SHBUSSEL.
> 
> Thank you very much for your patch again!
> 
> Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>

I've applied both of these, thanks.

Re: [PATCH] mtd: trivial sh_flctl changes

[David Woodhouse]

On Wed, 2010-01-27 at 18:11 +0900, Magnus Damm wrote:
> - * Copyright © 2008 Renesas Solutions Corp.
> - * Copyright © 2008 Atom Create Engineering Co., Ltd.
> + * Copyright (c) 2008 Renesas Solutions Corp.
> + * Copyright (c) 2008 Atom Create Engineering Co., Ltd. 

Um, why?

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@intel.com                              Intel Corporation

Re: [PATCH] mtd: trivial sh_flctl changes

[Magnus Damm]

On Thu, Mar 18, 2010 at 4:54 PM, David Woodhouse <dwmw2@infradead.org> wrote:
> On Wed, 2010-01-27 at 18:11 +0900, Magnus Damm wrote:
>> - * Copyright © 2008 Renesas Solutions Corp.
>> - * Copyright © 2008 Atom Create Engineering Co., Ltd.
>> + * Copyright (c) 2008 Renesas Solutions Corp.
>> + * Copyright (c) 2008 Atom Create Engineering Co., Ltd.
>
> Um, why?

Why not? You can keep them if you'd like. =)

/ magnus