redonkable/remarkable-linux
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mtd: trivial sh_flctl changes

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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>
Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2010-02-02 13:01:25 +09:00 committed by Paul Mundt
parent 9d3f1881ab
commit b79c7adf82
3 changed files with 26 additions and 21 deletions
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4
drivers/mtd/nand/Kconfig
View file

@ -457,10 +457,10 @@ config MTD_NAND_NOMADIK
config MTD_NAND_SH_FLCTL config MTD_NAND_SH_FLCTL
tristate "Support for NAND on Renesas SuperH FLCTL" tristate "Support for NAND on Renesas SuperH FLCTL"
depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723 depends on MTD_NAND && SUPERH
help help
Several Renesas SuperH CPU has FLCTL. This option enables support 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 config MTD_NAND_DAVINCI
tristate "Support NAND on DaVinci SoC" tristate "Support NAND on DaVinci SoC"

42
drivers/mtd/nand/sh_flctl.c
View file

@ -1,10 +1,10 @@
/* /*
* SuperH FLCTL nand controller * SuperH FLCTL nand controller
* *
* Copyright © 2008 Renesas Solutions Corp. * Copyright (c) 2008 Renesas Solutions Corp.
* Copyright © 2008 Atom Create Engineering Co., Ltd. * 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 * 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 * it under the terms of the GNU General Public License as published by
@ -75,6 +75,11 @@ static void start_translation(struct sh_flctl *flctl)
writeb(TRSTRT, FLTRCR(flctl)); 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) static void wait_completion(struct sh_flctl *flctl)
{ {
uint32_t timeout = LOOP_TIMEOUT_MAX; uint32_t timeout = LOOP_TIMEOUT_MAX;
@ -87,7 +92,7 @@ static void wait_completion(struct sh_flctl *flctl)
udelay(1); udelay(1);
} }
printk(KERN_ERR "wait_completion(): Timeout occured \n"); timeout_error(flctl, __func__);
writeb(0x0, FLTRCR(flctl)); writeb(0x0, FLTRCR(flctl));
} }
@ -132,7 +137,7 @@ static void wait_rfifo_ready(struct sh_flctl *flctl)
return; return;
udelay(1); udelay(1);
} }
printk(KERN_ERR "wait_rfifo_ready(): Timeout occured \n"); timeout_error(flctl, __func__);
} }
static void wait_wfifo_ready(struct sh_flctl *flctl) static void wait_wfifo_ready(struct sh_flctl *flctl)
@ -146,7 +151,7 @@ static void wait_wfifo_ready(struct sh_flctl *flctl)
return; return;
udelay(1); 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) static int wait_recfifo_ready(struct sh_flctl *flctl, int sector_number)
@ -198,7 +203,7 @@ static int wait_recfifo_ready(struct sh_flctl *flctl, int sector_number)
writel(0, FL4ECCCR(flctl)); writel(0, FL4ECCCR(flctl));
} }
printk(KERN_ERR "wait_recfifo_ready(): Timeout occured \n"); timeout_error(flctl, __func__);
return 1; /* timeout */ return 1; /* timeout */
} }
@ -214,7 +219,7 @@ static void wait_wecfifo_ready(struct sh_flctl *flctl)
return; return;
udelay(1); 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) static void read_datareg(struct sh_flctl *flctl, int offset)
@ -769,38 +774,36 @@ static int flctl_chip_init_tail(struct mtd_info *mtd)
return 0; return 0;
} }
static int __init flctl_probe(struct platform_device *pdev) static int __devinit flctl_probe(struct platform_device *pdev)
{ {
struct resource *res; struct resource *res;
struct sh_flctl *flctl; struct sh_flctl *flctl;
struct mtd_info *flctl_mtd; struct mtd_info *flctl_mtd;
struct nand_chip *nand; struct nand_chip *nand;
struct sh_flctl_platform_data *pdata; struct sh_flctl_platform_data *pdata;
int ret; int ret = -ENXIO;
pdata = pdev->dev.platform_data; pdata = pdev->dev.platform_data;
if (pdata == NULL) { if (pdata == NULL) {
printk(KERN_ERR "sh_flctl platform_data not found.\n"); dev_err(&pdev->dev, "no platform data defined\n");
return -ENODEV; return -EINVAL;
} }
flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL); flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL);
if (!flctl) { 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; return -ENOMEM;
} }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) { if (!res) {
printk(KERN_ERR "%s: resource not found.\n", __func__); dev_err(&pdev->dev, "failed to get I/O memory\n");
ret = -ENODEV;
goto err; goto err;
} }
flctl->reg = ioremap(res->start, res->end - res->start + 1); flctl->reg = ioremap(res->start, resource_size(res));
if (flctl->reg == NULL) { if (flctl->reg == NULL) {
printk(KERN_ERR "%s: ioremap error.\n", __func__); dev_err(&pdev->dev, "failed to remap I/O memory\n");
ret = -ENOMEM;
goto err; goto err;
} }
@ -808,6 +811,7 @@ static int __init flctl_probe(struct platform_device *pdev)
flctl_mtd = &flctl->mtd; flctl_mtd = &flctl->mtd;
nand = &flctl->chip; nand = &flctl->chip;
flctl_mtd->priv = nand; flctl_mtd->priv = nand;
flctl->pdev = pdev;
flctl->hwecc = pdata->has_hwecc; flctl->hwecc = pdata->has_hwecc;
flctl_register_init(flctl, pdata->flcmncr_val); flctl_register_init(flctl, pdata->flcmncr_val);
@ -846,7 +850,7 @@ err:
return ret; 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); struct sh_flctl *flctl = platform_get_drvdata(pdev);

1
include/linux/mtd/sh_flctl.h
View file

@ -96,6 +96,7 @@
struct sh_flctl { struct sh_flctl {
struct mtd_info mtd; struct mtd_info mtd;
struct nand_chip chip; struct nand_chip chip;
struct platform_device *pdev;
void __iomem *reg; void __iomem *reg;
uint8_t done_buff[2048 + 64]; /* max size 2048 + 64 */ uint8_t done_buff[2048 + 64]; /* max size 2048 + 64 */