On Tuesday 04 November 2014 12:09:44 Ulf Hansson wrote:
> On 2 November 2014 22:51, Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx> wrote:
> > This patch resurrects an old never-finished driver for Toshiba PCI SD
> > controllers found in some older Toshiba laptops (such as Portege R100):
> >
> > 02:0d.0 System peripheral [0880]: Toshiba America Info Systems SD TypA Controller [1179:0805] (rev 05)
> >
> > The code is fixed, cleaned up and successfully tested with SD, SDHC, SDXC and
> > MMC cards on Portege R100. (MMC cards don't even work in Windows!)
> > SDIO probably does not work (don't have any SDIO card).
> >
> > The hardware is slow (around 2 MB/s - same in Windows) because it does not
> > support bus mastering (busmaster enable bit cannot be set in PCI control reg).
> > Also the card clock is limited to 16MHz (33MHz PCI clock divided by 2).
> >
> > Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
>
> Hi Ondrej,
>
> Sorry for a very very late reply.
>
...
> > +static void toshsd_init(struct toshsd_host *host);
> > +static void toshsd_set_ios_unlocked(struct mmc_host *mmc, struct mmc_ios *ios);
>
> I would implement these functions at the proper place instead of
> having them defined here.
>
> Moreover I think toshsd_set_ios_unlocked() could be renamed to
> "__toshsd_set_ios()".
OK, will do.
> > +
> > +static inline u16 toshsd_readw(struct toshsd_host *host, u16 reg)
> > +{
> > + return ioread16(host->ioaddr + reg);
> > +}
> > +
> > +static inline u32 toshsd_readl(struct toshsd_host *host, u16 reg)
> > +{
> > + return ioread32(host->ioaddr + reg);
> > +}
> > +
> > +static inline void toshsd_writew(struct toshsd_host *host, u16 reg, u16 val)
> > +{
> > + iowrite16(val, host->ioaddr + reg);
> > +}
> > +
> > +static inline void toshsd_writel(struct toshsd_host *host, u16 reg, u32 val)
> > +{
> > + iowrite32(val, host->ioaddr + reg);
> > +}
> > +
> > +static inline void toshsd_readl_rep(struct toshsd_host *host, u16 reg,
> > + void *dst, unsigned long count)
> > +{
> > + ioread32_rep(host->ioaddr + reg, dst, count);
> > +}
> > +
> > +static inline void toshsd_writel_rep(struct toshsd_host *host, u16 reg,
> > + const void *src, unsigned long count)
> > +{
> > + iowrite32_rep(host->ioaddr + reg, src, count);
> > +}
>
> To me, all these wrapper functions seems a bit ugly. How about
> invoking io* functions directly instead?
It's a matter of preference, some drivers use wrappers, some don't.
I can remove them if they're not recommended in mmc subsystem.
...
> > + tasklet_schedule(&host->data_read_tasklet);
>
> Instead of using a tasklet, I would advise to use a threaded IRQ.
Haven't used threaded IRQ yet, will try.
...
> > +#ifdef CONFIG_PM
>
> This should be CONFIG_PM_SLEEP.
>
> > +
> > +static int toshsd_suspend(struct pci_dev *pdev, pm_message_t state)
>
> This is the legacy version of system PM callbacks. You need to convert
> to the modern ones instead.
>
> > +{
> > + struct toshsd_host *host = pci_get_drvdata(pdev);
> > +
> > + toshsd_powerdown(host);
> > +
> > + pci_save_state(pdev);
> > + pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
> > + pci_disable_device(pdev);
> > + pci_set_power_state(pdev, pci_choose_state(pdev, state));
> > +
> > + return 0;
> > +}
> > +
> > +static int toshsd_resume(struct pci_dev *pdev)
>
> This is the legacy version of system PM callbacks. You need to convert
> to the modern ones instead.
I just converted them and found that suspend does not work on current kernels
when a SD card is inserted (even with unmodified toshsd driver):
[ 188.960862] dpm_run_callback(): mmc_bus_suspend+0x0/0x2c [mmc_core] returns -110
[ 188.960867] PM: Device mmc0:b368 failed to suspend: error -110
[ 188.960869] PM: Some devices failed to suspend, or early wake event detected
Is it a kernel bug or the driver is missing something?
--
Ondrej Zary
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
