On Sun, Mar 07, 2010 at 10:59:01PM +0000, Ben Dooks wrote:
> On Sun, Mar 07, 2010 at 09:47:58AM -0800, Cory Maccarrone wrote:
> > From: Marek Belisko <marek.beli...@open-nandra.com>
> >
> > The omap850 and omap730 use 16-bit registers instead of 32-bit, requiring
> > a modification of the register addresses in the mmc-omap driver. To resolve
> > this, a bit shift is performed on base register addresses, either by 1 or 2
> > bits depending on the CPU in use. This yields the correct registers for
> > each CPU.
>
> merged the previous one into my tree earlier today.
ignore this, didn't read the message properly and thought it was the i2c
patch.
> > Signed-off-by: Marek Belisko <marek.beli...@open-nandra.com>
> > Signed-off-by: Cory Maccarrone <darkstar6...@gmail.com>
> > Signed-off-by: Tony Lindgren <t...@atomide.com>
> > ---
> > drivers/mmc/host/omap.c | 62
> > +++++++++++++++++++++++++----------------------
> > 1 files changed, 33 insertions(+), 29 deletions(-)
> >
> > This is a resubmit of a patch I sent in several months ago. Tony Lindgren
> > merged
> > this into linux-omap's master and testing branches but has stated that he
> > will not
> > merge it further as linux-mmc needs to approve this. There hasn't been any
> > comments
> > raised on either of the linux-omap or linux-mmc mailing lists about
> > problems. Due to
> > the unique nature of the omap7xx platform, this patch is required for MMC
> > card access.
> > Is there any chance this can be included into the next -rc cycle, as it is
> > a fix for
> > devices that have 16-bit registers?
> >
> > diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
> > index c6d7e8e..53362c4 100644
> > --- a/drivers/mmc/host/omap.c
> > +++ b/drivers/mmc/host/omap.c
> > @@ -38,30 +38,30 @@
> > #include <plat/fpga.h>
> >
> > #define OMAP_MMC_REG_CMD 0x00
> > -#define OMAP_MMC_REG_ARGL 0x04
> > -#define OMAP_MMC_REG_ARGH 0x08
> > -#define OMAP_MMC_REG_CON 0x0c
> > -#define OMAP_MMC_REG_STAT 0x10
> > -#define OMAP_MMC_REG_IE 0x14
> > -#define OMAP_MMC_REG_CTO 0x18
> > -#define OMAP_MMC_REG_DTO 0x1c
> > -#define OMAP_MMC_REG_DATA 0x20
> > -#define OMAP_MMC_REG_BLEN 0x24
> > -#define OMAP_MMC_REG_NBLK 0x28
> > -#define OMAP_MMC_REG_BUF 0x2c
> > -#define OMAP_MMC_REG_SDIO 0x34
> > -#define OMAP_MMC_REG_REV 0x3c
> > -#define OMAP_MMC_REG_RSP0 0x40
> > -#define OMAP_MMC_REG_RSP1 0x44
> > -#define OMAP_MMC_REG_RSP2 0x48
> > -#define OMAP_MMC_REG_RSP3 0x4c
> > -#define OMAP_MMC_REG_RSP4 0x50
> > -#define OMAP_MMC_REG_RSP5 0x54
> > -#define OMAP_MMC_REG_RSP6 0x58
> > -#define OMAP_MMC_REG_RSP7 0x5c
> > -#define OMAP_MMC_REG_IOSR 0x60
> > -#define OMAP_MMC_REG_SYSC 0x64
> > -#define OMAP_MMC_REG_SYSS 0x68
> > +#define OMAP_MMC_REG_ARGL 0x01
> > +#define OMAP_MMC_REG_ARGH 0x02
> > +#define OMAP_MMC_REG_CON 0x03
> > +#define OMAP_MMC_REG_STAT 0x04
> > +#define OMAP_MMC_REG_IE 0x05
> > +#define OMAP_MMC_REG_CTO 0x06
> > +#define OMAP_MMC_REG_DTO 0x07
> > +#define OMAP_MMC_REG_DATA 0x08
> > +#define OMAP_MMC_REG_BLEN 0x09
> > +#define OMAP_MMC_REG_NBLK 0x0a
> > +#define OMAP_MMC_REG_BUF 0x0b
> > +#define OMAP_MMC_REG_SDIO 0x0d
> > +#define OMAP_MMC_REG_REV 0x0f
> > +#define OMAP_MMC_REG_RSP0 0x10
> > +#define OMAP_MMC_REG_RSP1 0x11
> > +#define OMAP_MMC_REG_RSP2 0x12
> > +#define OMAP_MMC_REG_RSP3 0x13
> > +#define OMAP_MMC_REG_RSP4 0x14
> > +#define OMAP_MMC_REG_RSP5 0x15
> > +#define OMAP_MMC_REG_RSP6 0x16
> > +#define OMAP_MMC_REG_RSP7 0x17
> > +#define OMAP_MMC_REG_IOSR 0x18
> > +#define OMAP_MMC_REG_SYSC 0x19
> > +#define OMAP_MMC_REG_SYSS 0x1a
> >
> > #define OMAP_MMC_STAT_CARD_ERR (1 << 14)
> > #define OMAP_MMC_STAT_CARD_IRQ (1 << 13)
> > @@ -77,8 +77,9 @@
> > #define OMAP_MMC_STAT_CARD_BUSY (1 << 2)
> > #define OMAP_MMC_STAT_END_OF_CMD (1 << 0)
> >
> > -#define OMAP_MMC_READ(host, reg) __raw_readw((host)->virt_base +
> > OMAP_MMC_REG_##reg)
> > -#define OMAP_MMC_WRITE(host, reg, val) __raw_writew((val),
> > (host)->virt_base + OMAP_MMC_REG_##reg)
> > +#define OMAP_MMC_REG(host, reg) (OMAP_MMC_REG_##reg <<
> > (host)->reg_shift)
> > +#define OMAP_MMC_READ(host, reg) __raw_readw((host)->virt_base +
> > OMAP_MMC_REG(host, reg))
> > +#define OMAP_MMC_WRITE(host, reg, val) __raw_writew((val),
> > (host)->virt_base + OMAP_MMC_REG(host, reg))
> >
> > /*
> > * Command types
> > @@ -132,6 +133,7 @@ struct mmc_omap_host {
> > int irq;
> > unsigned char bus_mode;
> > unsigned char hw_bus_mode;
> > + unsigned int reg_shift;
> >
> > struct work_struct cmd_abort_work;
> > unsigned abort:1;
> > @@ -679,9 +681,9 @@ mmc_omap_xfer_data(struct mmc_omap_host *host, int
> > write)
> > host->data->bytes_xfered += n;
> >
> > if (write) {
> > - __raw_writesw(host->virt_base + OMAP_MMC_REG_DATA,
> > host->buffer, n);
> > + __raw_writesw(host->virt_base + OMAP_MMC_REG(host, DATA),
> > host->buffer, n);
> > } else {
> > - __raw_readsw(host->virt_base + OMAP_MMC_REG_DATA, host->buffer,
> > n);
> > + __raw_readsw(host->virt_base + OMAP_MMC_REG(host, DATA),
> > host->buffer, n);
> > }
> > }
> >
> > @@ -899,7 +901,7 @@ mmc_omap_prepare_dma(struct mmc_omap_host *host, struct
> > mmc_data *data)
> > int dst_port = 0;
> > int sync_dev = 0;
> >
> > - data_addr = host->phys_base + OMAP_MMC_REG_DATA;
> > + data_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
> > frame = data->blksz;
> > count = sg_dma_len(sg);
> >
> > @@ -1492,6 +1494,8 @@ static int __init mmc_omap_probe(struct
> > platform_device *pdev)
> > }
> > }
> >
> > + host->reg_shift = (cpu_is_omap7xx() ? 1 : 2);
> > +
> > return 0;
> >
> > err_plat_cleanup:
> > --
> > 1.6.3.3
> >
> > --
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>
> --
> --
> Ben
>
> Q: What's a light-year?
> A: One-third less calories than a regular year.
>
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--
--
Ben
Q: What's a light-year?
A: One-third less calories than a regular year.
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