Message ID | AANLkTi=t=HwCi0PwngWUamvCLNoVd=k7V-vqAVSP5aER@mail.gmail.com |
---|---|
State | New, archived |
Headers | show |
On Wed, Aug 18, 2010 at 10:36 PM, Haojian Zhuang <haojian.zhuang@gmail.com> wrote: > From 5235f4075c3d2224a2d2351e2800ef42920ebd75 Mon Sep 17 00:00:00 2001 > From: Lei Wen <leiwen@marvell.com> > Date: Wed, 18 Aug 2010 18:00:03 +0800 > Subject: [PATCH 3/5] pxa3xx_nand: introduce default timing to reduce > read id times > > We certainly don't need to send read id command times by times, since > we already know what the id is after the first read id... > > So create a default timing which could ensure it would successfully read > id out all supported chip. Then follow the build-in table to reconfigure > the timing. > > Signed-off-by: Lei Wen <leiwen@marvell.com> > Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> > --- > drivers/mtd/nand/pxa3xx_nand.c | 68 +++++++++++++++++++-------------------- > 1 files changed, 33 insertions(+), 35 deletions(-) > > diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c > index 0b63f9c..8385e3a 100644 > --- a/drivers/mtd/nand/pxa3xx_nand.c > +++ b/drivers/mtd/nand/pxa3xx_nand.c > @@ -190,22 +190,27 @@ static struct pxa3xx_nand_cmdset default_cmdset = { > }; > > static struct pxa3xx_nand_timing timing[] = { > - { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, > - { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, > - { 10, 35, 15, 25, 15, 25, 25000, 60, 10, }, > + { 40, 80, 60, 100, 80, 100, 90000, 400, 40, }, > + { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, > + { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, > + { 10, 35, 15, 25, 15, 25, 25000, 60, 10, }, > }; > > static struct pxa3xx_nand_flash builtin_flash_types[] = { > - { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[0] }, > - { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[0] }, > - { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[0] }, > - { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[1] }, > - { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[1] }, > - { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[1] }, > - { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[1] }, > - { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[2] }, > + { 0, 0, 2048, 8, 8, 0, &default_cmdset, &timing[0] }, > + { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[1] }, > + { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[1] }, > + { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[1] }, > + { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[2] }, > + { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[2] }, > + { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[2] }, > + { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[2] }, > + { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[3] }, > }; > > +/* Define a default flash type setting serve as flash detecting only */ > +#define DEFAULT_FLASH_TYPE (&builtin_flash_types[0]) > + > #define NDTR0_tCH(c) (min((c), 7) << 19) > #define NDTR0_tCS(c) (min((c), 7) << 16) > #define NDTR0_tWH(c) (min((c), 7) << 11) > @@ -945,36 +950,29 @@ static int pxa3xx_nand_detect_flash(struct > pxa3xx_nand_info *info, > if (pxa3xx_nand_detect_config(info) == 0) > return 0; > > - for (i = 0; i<pdata->num_flash; ++i) { > - f = pdata->flash + i; > - > - if (pxa3xx_nand_config_flash(info, f)) > - continue; > - > - if (__readid(info, &id)) > - continue; > - > - if (id == f->chip_id) > - return 0; > - } > - > - for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) { > - > - f = &builtin_flash_types[i]; > - > - if (pxa3xx_nand_config_flash(info, f)) > - continue; > - > - if (__readid(info, &id)) > - continue; > - > - if (id == f->chip_id) > + /* we use default timing to detect id */ > + f = DEFAULT_FLASH_TYPE; > + pxa3xx_nand_config_flash(info, f); > + if (__readid(info, &id)) > + goto fail_detect; > + > + for (i=0; i<ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; i++) { > + /* we first choose the flash definition from platfrom */ > + if (i < pdata->num_flash) > + f = pdata->flash + i; > + else > + f = &builtin_flash_types[i - pdata->num_flash + 1]; > + if (f->chip_id == id) { > + dev_info(&info->pdev->dev, "detect chip id: 0x%x\n", id); > + pxa3xx_nand_config_flash(info, f); > return 0; > + } > } > > dev_warn(&info->pdev->dev, > "failed to detect configured nand flash; found %04x instead of\n", > id); > +fail_detect: > return -ENODEV; > } > > -- > 1.7.0.4 >
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index 0b63f9c..8385e3a 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -190,22 +190,27 @@ static struct pxa3xx_nand_cmdset default_cmdset = { }; static struct pxa3xx_nand_timing timing[] = { - { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, - { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, - { 10, 35, 15, 25, 15, 25, 25000, 60, 10, }, + { 40, 80, 60, 100, 80, 100, 90000, 400, 40, }, + { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, + { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, + { 10, 35, 15, 25, 15, 25, 25000, 60, 10, }, }; static struct pxa3xx_nand_flash builtin_flash_types[] = { - { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[0] }, - { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[0] }, - { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[0] }, - { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[1] }, - { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[1] }, - { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[1] }, - { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[1] }, - { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[2] }, + { 0, 0, 2048, 8, 8, 0, &default_cmdset, &timing[0] }, + { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[1] }, + { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[1] }, + { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[1] }, + { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[2] }, + { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[2] }, + { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[2] }, + { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[2] }, + { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[3] }, }; +/* Define a default flash type setting serve as flash detecting only */ +#define DEFAULT_FLASH_TYPE (&builtin_flash_types[0]) + #define NDTR0_tCH(c) (min((c), 7) << 19) #define NDTR0_tCS(c) (min((c), 7) << 16) #define NDTR0_tWH(c) (min((c), 7) << 11) @@ -945,36 +950,29 @@ static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info, if (pxa3xx_nand_detect_config(info) == 0) return 0; - for (i = 0; i<pdata->num_flash; ++i) { - f = pdata->flash + i; - - if (pxa3xx_nand_config_flash(info, f)) - continue; - - if (__readid(info, &id)) - continue; - - if (id == f->chip_id) - return 0; - } - - for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) { - - f = &builtin_flash_types[i]; - - if (pxa3xx_nand_config_flash(info, f)) - continue; - - if (__readid(info, &id)) - continue; - - if (id == f->chip_id) + /* we use default timing to detect id */ + f = DEFAULT_FLASH_TYPE; + pxa3xx_nand_config_flash(info, f); + if (__readid(info, &id)) + goto fail_detect; + + for (i=0; i<ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; i++) { + /* we first choose the flash definition from platfrom */ + if (i < pdata->num_flash) + f = pdata->flash + i; + else + f = &builtin_flash_types[i - pdata->num_flash + 1]; + if (f->chip_id == id) { + dev_info(&info->pdev->dev, "detect chip id: 0x%x\n", id); + pxa3xx_nand_config_flash(info, f); return 0; + } } dev_warn(&info->pdev->dev, "failed to detect configured nand flash; found %04x instead of\n", id); +fail_detect: return -ENODEV; }