diff options
Diffstat (limited to 'drivers/mtd/nand/s3c2410.c')
| -rw-r--r-- | drivers/mtd/nand/s3c2410.c | 126 |
1 files changed, 66 insertions, 60 deletions
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c index 891e3a1b9110..d209214b1318 100644 --- a/drivers/mtd/nand/s3c2410.c +++ b/drivers/mtd/nand/s3c2410.c @@ -17,8 +17,9 @@ * 02-May-2005 BJD Reduced hwcontrol decode * 20-Jun-2005 BJD Updated s3c2440 support, fixed timing bug * 08-Jul-2005 BJD Fix OOPS when no platform data supplied + * 20-Oct-2005 BJD Fix timing calculation bug * - * $Id: s3c2410.c,v 1.14 2005/07/06 20:05:06 bjd Exp $ + * $Id: s3c2410.c,v 1.20 2005/11/07 11:14:31 gleixner Exp $ * * 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 @@ -48,9 +49,10 @@ #include <linux/kernel.h> #include <linux/string.h> #include <linux/ioport.h> -#include <linux/device.h> +#include <linux/platform_device.h> #include <linux/delay.h> #include <linux/err.h> +#include <linux/slab.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> @@ -58,7 +60,6 @@ #include <linux/mtd/partitions.h> #include <asm/io.h> -#include <asm/mach-types.h> #include <asm/hardware/clock.h> #include <asm/arch/regs-nand.h> @@ -124,25 +125,25 @@ static struct s3c2410_nand_info *s3c2410_nand_mtd_toinfo(struct mtd_info *mtd) return s3c2410_nand_mtd_toours(mtd)->info; } -static struct s3c2410_nand_info *to_nand_info(struct device *dev) +static struct s3c2410_nand_info *to_nand_info(struct platform_device *dev) { - return dev_get_drvdata(dev); + return platform_get_drvdata(dev); } -static struct s3c2410_platform_nand *to_nand_plat(struct device *dev) +static struct s3c2410_platform_nand *to_nand_plat(struct platform_device *dev) { - return dev->platform_data; + return dev->dev.platform_data; } /* timing calculations */ -#define NS_IN_KHZ 10000000 +#define NS_IN_KHZ 1000000 static int s3c2410_nand_calc_rate(int wanted, unsigned long clk, int max) { int result; - result = (wanted * NS_IN_KHZ) / clk; + result = (wanted * clk) / NS_IN_KHZ; result++; pr_debug("result %d from %ld, %d\n", result, clk, wanted); @@ -159,20 +160,22 @@ static int s3c2410_nand_calc_rate(int wanted, unsigned long clk, int max) return result; } -#define to_ns(ticks,clk) (((clk) * (ticks)) / NS_IN_KHZ) +#define to_ns(ticks,clk) (((ticks) * NS_IN_KHZ) / (unsigned int)(clk)) /* controller setup */ -static int s3c2410_nand_inithw(struct s3c2410_nand_info *info, - struct device *dev) +static int s3c2410_nand_inithw(struct s3c2410_nand_info *info, + struct platform_device *pdev) { - struct s3c2410_platform_nand *plat = to_nand_plat(dev); - unsigned int tacls, twrph0, twrph1; + struct s3c2410_platform_nand *plat = to_nand_plat(pdev); unsigned long clkrate = clk_get_rate(info->clk); + int tacls, twrph0, twrph1; unsigned long cfg; /* calculate the timing information for the controller */ + clkrate /= 1000; /* turn clock into kHz for ease of use */ + if (plat != NULL) { tacls = s3c2410_nand_calc_rate(plat->tacls, clkrate, 4); twrph0 = s3c2410_nand_calc_rate(plat->twrph0, clkrate, 8); @@ -183,16 +186,16 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info, twrph0 = 8; twrph1 = 8; } - + if (tacls < 0 || twrph0 < 0 || twrph1 < 0) { printk(KERN_ERR PFX "cannot get timings suitable for board\n"); return -EINVAL; } - printk(KERN_INFO PFX "timing: Tacls %ldns, Twrph0 %ldns, Twrph1 %ldns\n", - to_ns(tacls, clkrate), - to_ns(twrph0, clkrate), - to_ns(twrph1, clkrate)); + printk(KERN_INFO PFX "Tacls=%d, %dns Twrph0=%d %dns, Twrph1=%d %dns\n", + tacls, to_ns(tacls, clkrate), + twrph0, to_ns(twrph0, clkrate), + twrph1, to_ns(twrph1, clkrate)); if (!info->is_s3c2440) { cfg = S3C2410_NFCONF_EN; @@ -216,7 +219,7 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info, static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip) { struct s3c2410_nand_info *info; - struct s3c2410_nand_mtd *nmtd; + struct s3c2410_nand_mtd *nmtd; struct nand_chip *this = mtd->priv; void __iomem *reg; unsigned long cur; @@ -249,7 +252,7 @@ static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip) writel(cur, reg); } -/* command and control functions +/* command and control functions * * Note, these all use tglx's method of changing the IO_ADDR_W field * to make the code simpler, and use the nand layer's code to issue the @@ -321,7 +324,7 @@ static void s3c2440_nand_hwcontrol(struct mtd_info *mtd, int cmd) static int s3c2410_nand_devready(struct mtd_info *mtd) { struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd); - + if (info->is_s3c2440) return readb(info->regs + S3C2440_NFSTAT) & S3C2440_NFSTAT_READY; return readb(info->regs + S3C2410_NFSTAT) & S3C2410_NFSTAT_BUSY; @@ -342,7 +345,7 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat, if (read_ecc[0] == calc_ecc[0] && read_ecc[1] == calc_ecc[1] && - read_ecc[2] == calc_ecc[2]) + read_ecc[2] == calc_ecc[2]) return 0; /* we curently have no method for correcting the error */ @@ -427,20 +430,20 @@ static void s3c2410_nand_write_buf(struct mtd_info *mtd, /* device management functions */ -static int s3c2410_nand_remove(struct device *dev) +static int s3c2410_nand_remove(struct platform_device *pdev) { - struct s3c2410_nand_info *info = to_nand_info(dev); + struct s3c2410_nand_info *info = to_nand_info(pdev); - dev_set_drvdata(dev, NULL); + platform_set_drvdata(pdev, NULL); - if (info == NULL) + if (info == NULL) return 0; /* first thing we need to do is release all our mtds * and their partitions, then go through freeing the - * resources used + * resources used */ - + if (info->mtds != NULL) { struct s3c2410_nand_mtd *ptr = info->mtds; int mtdno; @@ -504,7 +507,7 @@ static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info, /* s3c2410_nand_init_chip * - * init a single instance of an chip + * init a single instance of an chip */ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info, @@ -559,10 +562,9 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info, * nand layer to look for devices */ -static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) +static int s3c24xx_nand_probe(struct platform_device *pdev, int is_s3c2440) { - struct platform_device *pdev = to_platform_device(dev); - struct s3c2410_platform_nand *plat = to_nand_plat(dev); + struct s3c2410_platform_nand *plat = to_nand_plat(pdev); struct s3c2410_nand_info *info; struct s3c2410_nand_mtd *nmtd; struct s3c2410_nand_set *sets; @@ -572,26 +574,26 @@ static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) int nr_sets; int setno; - pr_debug("s3c2410_nand_probe(%p)\n", dev); + pr_debug("s3c2410_nand_probe(%p)\n", pdev); info = kmalloc(sizeof(*info), GFP_KERNEL); if (info == NULL) { - printk(KERN_ERR PFX "no memory for flash info\n"); + dev_err(&pdev->dev, "no memory for flash info\n"); err = -ENOMEM; goto exit_error; } memzero(info, sizeof(*info)); - dev_set_drvdata(dev, info); + platform_set_drvdata(pdev, info); spin_lock_init(&info->controller.lock); init_waitqueue_head(&info->controller.wq); /* get the clock source and enable it */ - info->clk = clk_get(dev, "nand"); + info->clk = clk_get(&pdev->dev, "nand"); if (IS_ERR(info->clk)) { - printk(KERN_ERR PFX "failed to get clock"); + dev_err(&pdev->dev, "failed to get clock"); err = -ENOENT; goto exit_error; } @@ -608,27 +610,27 @@ static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) info->area = request_mem_region(res->start, size, pdev->name); if (info->area == NULL) { - printk(KERN_ERR PFX "cannot reserve register region\n"); + dev_err(&pdev->dev, "cannot reserve register region\n"); err = -ENOENT; goto exit_error; } - info->device = dev; + info->device = &pdev->dev; info->platform = plat; info->regs = ioremap(res->start, size); info->is_s3c2440 = is_s3c2440; if (info->regs == NULL) { - printk(KERN_ERR PFX "cannot reserve register region\n"); + dev_err(&pdev->dev, "cannot reserve register region\n"); err = -EIO; goto exit_error; - } + } - printk(KERN_INFO PFX "mapped registers at %p\n", info->regs); + dev_dbg(&pdev->dev, "mapped registers at %p\n", info->regs); /* initialise the hardware */ - err = s3c2410_nand_inithw(info, dev); + err = s3c2410_nand_inithw(info, pdev); if (err != 0) goto exit_error; @@ -642,7 +644,7 @@ static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) size = nr_sets * sizeof(*info->mtds); info->mtds = kmalloc(size, GFP_KERNEL); if (info->mtds == NULL) { - printk(KERN_ERR PFX "failed to allocate mtd storage\n"); + dev_err(&pdev->dev, "failed to allocate mtd storage\n"); err = -ENOMEM; goto exit_error; } @@ -656,7 +658,7 @@ static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) for (setno = 0; setno < nr_sets; setno++, nmtd++) { pr_debug("initialising set %d (%p, info %p)\n", setno, nmtd, info); - + s3c2410_nand_init_chip(info, nmtd, sets); nmtd->scan_res = nand_scan(&nmtd->mtd, @@ -669,12 +671,12 @@ static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) if (sets != NULL) sets++; } - + pr_debug("initialised ok\n"); return 0; exit_error: - s3c2410_nand_remove(dev); + s3c2410_nand_remove(pdev); if (err == 0) err = -EINVAL; @@ -683,42 +685,46 @@ static int s3c24xx_nand_probe(struct device *dev, int is_s3c2440) /* driver device registration */ -static int s3c2410_nand_probe(struct device *dev) +static int s3c2410_nand_probe(struct platform_device *dev) { return s3c24xx_nand_probe(dev, 0); } -static int s3c2440_nand_probe(struct device *dev) +static int s3c2440_nand_probe(struct platform_device *dev) { return s3c24xx_nand_probe(dev, 1); } -static struct device_driver s3c2410_nand_driver = { - .name = "s3c2410-nand", - .bus = &platform_bus_type, +static struct platform_driver s3c2410_nand_driver = { .probe = s3c2410_nand_probe, .remove = s3c2410_nand_remove, + .driver = { + .name = "s3c2410-nand", + .owner = THIS_MODULE, + }, }; -static struct device_driver s3c2440_nand_driver = { - .name = "s3c2440-nand", - .bus = &platform_bus_type, +static struct platform_driver s3c2440_nand_driver = { .probe = s3c2440_nand_probe, .remove = s3c2410_nand_remove, + .driver = { + .name = "s3c2440-nand", + .owner = THIS_MODULE, + }, }; static int __init s3c2410_nand_init(void) { printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n"); - driver_register(&s3c2440_nand_driver); - return driver_register(&s3c2410_nand_driver); + platform_driver_register(&s3c2440_nand_driver); + return platform_driver_register(&s3c2410_nand_driver); } static void __exit s3c2410_nand_exit(void) { - driver_unregister(&s3c2440_nand_driver); - driver_unregister(&s3c2410_nand_driver); + platform_driver_unregister(&s3c2440_nand_driver); + platform_driver_unregister(&s3c2410_nand_driver); } module_init(s3c2410_nand_init); |