[MTD NAND] s3c2412 support in s3c2410.c
authorBen Dooks <ben-mtd@fluff.org>
Tue, 27 Jun 2006 13:35:46 +0000 (14:35 +0100)
committerDavid Woodhouse <dwmw2@infradead.org>
Tue, 27 Jun 2006 13:35:46 +0000 (14:35 +0100)
Add support for both the S3C2412 and S3C2412 Samsung SoCs to
the increasingly mis-named s3c2410.c driver.

This currently only supports SLC ECCs, and a chip on nFCE0.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
drivers/mtd/nand/s3c2410.c
include/asm-arm/arch-s3c2410/regs-nand.h

index 5219bd212cf6b7ddf9cda3c8bc89346bf0eba4b3..ff5cef24d5bb3ccbfc9ce0476e6db222c43af160 100644 (file)
@@ -97,6 +97,12 @@ struct s3c2410_nand_mtd {
        int                             scan_res;
 };
 
+enum s3c_cpu_type {
+       TYPE_S3C2410,
+       TYPE_S3C2412,
+       TYPE_S3C2440,
+};
+
 /* overview of the s3c2410 nand state */
 
 struct s3c2410_nand_info {
@@ -110,9 +116,11 @@ struct s3c2410_nand_info {
        struct resource                 *area;
        struct clk                      *clk;
        void __iomem                    *regs;
+       void __iomem                    *sel_reg;
+       int                             sel_bit;
        int                             mtd_count;
 
-       unsigned char                   is_s3c2440;
+       enum s3c_cpu_type               cpu_type;
 };
 
 /* conversion functions */
@@ -146,7 +154,7 @@ static inline int allow_clk_stop(struct s3c2410_nand_info *info)
 
 #define NS_IN_KHZ 1000000
 
-static int s3c2410_nand_calc_rate(int wanted, unsigned long clk, int max)
+static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
 {
        int result;
 
@@ -170,24 +178,26 @@ static int s3c2410_nand_calc_rate(int wanted, unsigned long clk, int max)
 
 /* controller setup */
 
-static int s3c2410_nand_inithw(struct s3c2410_nand_info *info, struct platform_device *pdev)
+static int s3c2410_nand_inithw(struct s3c2410_nand_info *info,
+                              struct platform_device *pdev)
 {
        struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
        unsigned long clkrate = clk_get_rate(info->clk);
+       int tacls_max = (info->cpu_type == TYPE_S3C2412) ? 8 : 4;
        int tacls, twrph0, twrph1;
-       unsigned long cfg;
+       unsigned long cfg = 0;
 
        /* 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);
-               twrph1 = s3c2410_nand_calc_rate(plat->twrph1, clkrate, 8);
+               tacls = s3c_nand_calc_rate(plat->tacls, clkrate, tacls_max);
+               twrph0 = s3c_nand_calc_rate(plat->twrph0, clkrate, 8);
+               twrph1 = s3c_nand_calc_rate(plat->twrph1, clkrate, 8);
        } else {
                /* default timings */
-               tacls = 4;
+               tacls = tacls_max;
                twrph0 = 8;
                twrph1 = 8;
        }
@@ -200,20 +210,23 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info, struct platform_d
        dev_info(info->device, "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) {
+       switch (info->cpu_type) {
+       case TYPE_S3C2410:
                cfg = S3C2410_NFCONF_EN;
                cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
                cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
                cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
-       } else {
+               break;
+
+       case TYPE_S3C2440:
+       case TYPE_S3C2412:
                cfg = S3C2440_NFCONF_TACLS(tacls - 1);
                cfg |= S3C2440_NFCONF_TWRPH0(twrph0 - 1);
                cfg |= S3C2440_NFCONF_TWRPH1(twrph1 - 1);
 
                /* enable the controller and de-assert nFCE */
 
-               writel(S3C2440_NFCONT_ENABLE | S3C2440_NFCONT_ENABLE,
-                      info->regs + S3C2440_NFCONT);
+               writel(S3C2440_NFCONT_ENABLE, info->regs + S3C2440_NFCONT);
        }
 
        dev_dbg(info->device, "NF_CONF is 0x%lx\n", cfg);
@@ -229,23 +242,18 @@ static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip)
        struct s3c2410_nand_info *info;
        struct s3c2410_nand_mtd *nmtd;
        struct nand_chip *this = mtd->priv;
-       void __iomem *reg;
        unsigned long cur;
-       unsigned long bit;
 
        nmtd = this->priv;
        info = nmtd->info;
 
-       bit = (info->is_s3c2440) ? S3C2440_NFCONT_nFCE : S3C2410_NFCONF_nFCE;
-       reg = info->regs + ((info->is_s3c2440) ? S3C2440_NFCONT : S3C2410_NFCONF);
-
        if (chip != -1 && allow_clk_stop(info))
                clk_enable(info->clk);
 
-       cur = readl(reg);
+       cur = readl(info->sel_reg);
 
        if (chip == -1) {
-               cur |= bit;
+               cur |= info->sel_bit;
        } else {
                if (nmtd->set != NULL && chip > nmtd->set->nr_chips) {
                        dev_err(info->device, "invalid chip %d\n", chip);
@@ -257,10 +265,10 @@ static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip)
                                (info->platform->select_chip) (nmtd->set, chip);
                }
 
-               cur &= ~bit;
+               cur &= ~info->sel_bit;
        }
 
-       writel(cur, reg);
+       writel(cur, info->sel_reg);
 
        if (chip == -1 && allow_clk_stop(info))
                clk_disable(info->clk);
@@ -309,15 +317,25 @@ 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;
 }
 
+static int s3c2440_nand_devready(struct mtd_info *mtd)
+{
+       struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
+       return readb(info->regs + S3C2440_NFSTAT) & S3C2440_NFSTAT_READY;
+}
+
+static int s3c2412_nand_devready(struct mtd_info *mtd)
+{
+       struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
+       return readb(info->regs + S3C2412_NFSTAT) & S3C2412_NFSTAT_READY;
+}
+
 /* ECC handling functions */
 
-static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc)
+static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
+                                    u_char *read_ecc, u_char *calc_ecc)
 {
        pr_debug("s3c2410_nand_correct_data(%p,%p,%p,%p)\n", mtd, dat, read_ecc, calc_ecc);
 
@@ -485,11 +503,8 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
                                   struct s3c2410_nand_set *set)
 {
        struct nand_chip *chip = &nmtd->chip;
+       void __iomem *regs = info->regs;
 
-       chip->IO_ADDR_R    = info->regs + S3C2410_NFDATA;
-       chip->IO_ADDR_W    = info->regs + S3C2410_NFDATA;
-       chip->cmd_ctrl     = s3c2410_nand_hwcontrol;
-       chip->dev_ready    = s3c2410_nand_devready;
        chip->write_buf    = s3c2410_nand_write_buf;
        chip->read_buf     = s3c2410_nand_read_buf;
        chip->select_chip  = s3c2410_nand_select_chip;
@@ -498,11 +513,37 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
        chip->options      = 0;
        chip->controller   = &info->controller;
 
-       if (info->is_s3c2440) {
-               chip->IO_ADDR_R  = info->regs + S3C2440_NFDATA;
-               chip->IO_ADDR_W  = info->regs + S3C2440_NFDATA;
-               chip->cmd_ctrl   = s3c2440_nand_hwcontrol;
-       }
+       switch (info->cpu_type) {
+       case TYPE_S3C2410:
+               chip->IO_ADDR_W = regs + S3C2410_NFDATA;
+               info->sel_reg   = regs + S3C2410_NFCONF;
+               info->sel_bit   = S3C2410_NFCONF_nFCE;
+               chip->cmd_ctrl  = s3c2410_nand_hwcontrol;
+               chip->dev_ready = s3c2410_nand_devready;
+               break;
+
+       case TYPE_S3C2440:
+               chip->IO_ADDR_W = regs + S3C2440_NFDATA;
+               info->sel_reg   = regs + S3C2440_NFCONT;
+               info->sel_bit   = S3C2440_NFCONT_nFCE;
+               chip->cmd_ctrl  = s3c2440_nand_hwcontrol;
+               chip->dev_ready = s3c2440_nand_devready;
+               break;
+
+       case TYPE_S3C2412:
+               chip->IO_ADDR_W = regs + S3C2440_NFDATA;
+               info->sel_reg   = regs + S3C2440_NFCONT;
+               info->sel_bit   = S3C2412_NFCONT_nFCE0;
+               chip->cmd_ctrl  = s3c2440_nand_hwcontrol;
+               chip->dev_ready = s3c2412_nand_devready;
+
+               if (readl(regs + S3C2410_NFCONF) & S3C2412_NFCONF_NANDBOOT)
+                       dev_info(info->device, "System booted from NAND\n");
+
+               break;
+       }
+
+       chip->IO_ADDR_R = chip->IO_ADDR_W;
 
        nmtd->info         = info;
        nmtd->mtd.priv     = chip;
@@ -510,17 +551,25 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
        nmtd->set          = set;
 
        if (hardware_ecc) {
-               chip->ecc.correct   = s3c2410_nand_correct_data;
-               chip->ecc.hwctl     = s3c2410_nand_enable_hwecc;
                chip->ecc.calculate = s3c2410_nand_calculate_ecc;
+               chip->ecc.correct   = s3c2410_nand_correct_data;
                chip->ecc.mode      = NAND_ECC_HW;
                chip->ecc.size      = 512;
                chip->ecc.bytes     = 3;
                chip->ecc.layout    = &nand_hw_eccoob;
 
-               if (info->is_s3c2440) {
-                       chip->ecc.hwctl     = s3c2440_nand_enable_hwecc;
-                       chip->ecc.calculate = s3c2440_nand_calculate_ecc;
+               switch (info->cpu_type) {
+               case TYPE_S3C2410:
+                       chip->ecc.hwctl     = s3c2410_nand_enable_hwecc;
+                       chip->ecc.calculate = s3c2410_nand_calculate_ecc;
+                       break;
+
+               case TYPE_S3C2412:
+               case TYPE_S3C2440:
+                       chip->ecc.hwctl     = s3c2440_nand_enable_hwecc;
+                       chip->ecc.calculate = s3c2440_nand_calculate_ecc;
+                       break;
+
                }
        } else {
                chip->ecc.mode      = NAND_ECC_SOFT;
@@ -535,7 +584,8 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
  * nand layer to look for devices
 */
 
-static int s3c24xx_nand_probe(struct platform_device *pdev, int is_s3c2440)
+static int s3c24xx_nand_probe(struct platform_device *pdev,
+                             enum s3c_cpu_type cpu_type)
 {
        struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
        struct s3c2410_nand_info *info;
@@ -590,7 +640,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev, int is_s3c2440)
        info->device     = &pdev->dev;
        info->platform   = plat;
        info->regs       = ioremap(res->start, size);
-       info->is_s3c2440 = is_s3c2440;
+       info->cpu_type   = cpu_type;
 
        if (info->regs == NULL) {
                dev_err(&pdev->dev, "cannot reserve register region\n");
@@ -697,12 +747,17 @@ static int s3c24xx_nand_resume(struct platform_device *dev)
 
 static int s3c2410_nand_probe(struct platform_device *dev)
 {
-       return s3c24xx_nand_probe(dev, 0);
+       return s3c24xx_nand_probe(dev, TYPE_S3C2410);
 }
 
 static int s3c2440_nand_probe(struct platform_device *dev)
 {
-       return s3c24xx_nand_probe(dev, 1);
+       return s3c24xx_nand_probe(dev, TYPE_S3C2440);
+}
+
+static int s3c2412_nand_probe(struct platform_device *dev)
+{
+       return s3c24xx_nand_probe(dev, TYPE_S3C2412);
 }
 
 static struct platform_driver s3c2410_nand_driver = {
@@ -727,16 +782,29 @@ static struct platform_driver s3c2440_nand_driver = {
        },
 };
 
+static struct platform_driver s3c2412_nand_driver = {
+       .probe          = s3c2412_nand_probe,
+       .remove         = s3c2410_nand_remove,
+       .suspend        = s3c24xx_nand_suspend,
+       .resume         = s3c24xx_nand_resume,
+       .driver         = {
+               .name   = "s3c2412-nand",
+               .owner  = THIS_MODULE,
+       },
+};
+
 static int __init s3c2410_nand_init(void)
 {
        printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n");
 
+       platform_driver_register(&s3c2412_nand_driver);
        platform_driver_register(&s3c2440_nand_driver);
        return platform_driver_register(&s3c2410_nand_driver);
 }
 
 static void __exit s3c2410_nand_exit(void)
 {
+       platform_driver_unregister(&s3c2412_nand_driver);
        platform_driver_unregister(&s3c2440_nand_driver);
        platform_driver_unregister(&s3c2410_nand_driver);
 }
index 7cff235e667aeea2ef79c9d002bebc85b2d95abb..c1470c695c33556ea6a85f9d4efc4287fc08dea8 100644 (file)
 #define S3C2440_NFESTAT1 S3C2410_NFREG(0x28)
 #define S3C2440_NFMECC0  S3C2410_NFREG(0x2C)
 #define S3C2440_NFMECC1  S3C2410_NFREG(0x30)
-#define S3C2440_NFSECC   S3C2410_NFREG(0x34)
+#define S3C2440_NFSECC   S3C24E10_NFREG(0x34)
 #define S3C2440_NFSBLK   S3C2410_NFREG(0x38)
 #define S3C2440_NFEBLK   S3C2410_NFREG(0x3C)
 
+#define S3C2412_NFSBLK         S3C2410_NFREG(0x20)
+#define S3C2412_NFEBLK         S3C2410_NFREG(0x24)
+#define S3C2412_NFSTAT         S3C2410_NFREG(0x28)
+#define S3C2412_NFMECC_ERR0    S3C2410_NFREG(0x2C)
+#define S3C2412_NFMECC_ERR1    S3C2410_NFREG(0x30)
+#define S3C2412_NFMECC0                S3C2410_NFREG(0x34)
+#define S3C2412_NFMECC1                S3C2410_NFREG(0x38)
+#define S3C2412_NFSECC         S3C2410_NFREG(0x3C)
+
 #define S3C2410_NFCONF_EN          (1<<15)
 #define S3C2410_NFCONF_512BYTE     (1<<14)
 #define S3C2410_NFCONF_4STEP       (1<<13)
 #define S3C2440_NFSTAT_RnB_CHANGE      (1<<2)
 #define S3C2440_NFSTAT_ILLEGAL_ACCESS  (1<<3)
 
+#define S3C2412_NFCONF_NANDBOOT                (1<<31)
+#define S3C2412_NFCONF_ECCCLKCON       (1<<30)
+#define S3C2412_NFCONF_ECC_MLC         (1<<24)
+#define S3C2412_NFCONF_TACLS_MASK      (7<<12) /* 1 extra bit of Tacls */
+
+#define S3C2412_NFCONT_ECC4_DIRWR      (1<<18)
+#define S3C2412_NFCONT_LOCKTIGHT       (1<<17)
+#define S3C2412_NFCONT_SOFTLOCK                (1<<16)
+#define S3C2412_NFCONT_ECC4_ENCINT     (1<<13)
+#define S3C2412_NFCONT_ECC4_DECINT     (1<<12)
+#define S3C2412_NFCONT_MAIN_ECC_LOCK   (1<<7)
+#define S3C2412_NFCONT_INIT_MAIN_ECC   (1<<5)
+#define S3C2412_NFCONT_nFCE1           (1<<2)
+#define S3C2412_NFCONT_nFCE0           (1<<1)
+
+#define S3C2412_NFSTAT_ECC_ENCDONE     (1<<7)
+#define S3C2412_NFSTAT_ECC_DECDONE     (1<<6)
+#define S3C2412_NFSTAT_ILLEGAL_ACCESS  (1<<5)
+#define S3C2412_NFSTAT_RnB_CHANGE      (1<<4)
+#define S3C2412_NFSTAT_nFCE1           (1<<3)
+#define S3C2412_NFSTAT_nFCE0           (1<<2)
+#define S3C2412_NFSTAT_Res1            (1<<1)
+#define S3C2412_NFSTAT_READY           (1<<0)
+
+#define S3C2412_NFECCERR_SERRDATA(x)   (((x) >> 21) & 0xf)
+#define S3C2412_NFECCERR_SERRBIT(x)    (((x) >> 18) & 0x7)
+#define S3C2412_NFECCERR_MERRDATA(x)   (((x) >> 7) & 0x3ff)
+#define S3C2412_NFECCERR_MERRBIT(x)    (((x) >> 4) & 0x7)
+#define S3C2412_NFECCERR_SPARE_ERR(x)  (((x) >> 2) & 0x3)
+#define S3C2412_NFECCERR_MAIN_ERR(x)   (((x) >> 2) & 0x3)
+#define S3C2412_NFECCERR_NONE          (0)
+#define S3C2412_NFECCERR_1BIT          (1)
+#define S3C2412_NFECCERR_MULTIBIT      (2)
+#define S3C2412_NFECCERR_ECCAREA       (3)
+
+
+
 #endif /* __ASM_ARM_REGS_NAND */