Elvis Dowson had written, on 10/14/2010 04:48 PM, the following:
Hi,
I'm trying to bring up a TI WL1271 wlan module connected to MMC2 controller of a TI OMAP 3530 processor.
I am unclear about the difference between the use of twl4030_hsmmc_info and omap_mmc_platform_data, to set the attributes and constraints for the MMC1 (connected to microSD card) and MMC2 (connected to WLAN module).
could you please fix your mailer btw for line wraps?
The beagleboard uses twl4030_mmc_init, which has a wrapper for omap_mmc_platform_data defined in mmc-twl4030.h.
The board-sholes-hsmmc.c doesn't use twl4030, but directly uses the omap_mmc_platform_data structure.
Example:
board-omap3beagle.c uses twl4030_mmc_init, which internally uses the following structure to define mmc properties.
static struct twl4030_hsmmc_info mmc[] = {
{
.mmc = 1,
.wires = 8,
.gpio_wp = -ENOSYS,
.gpio_cd = -ENOSYS,
.name = "MMC1 controller slot"
},
{
.mmc = 2,
.wires = 4,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
// .transceiver = true,
.name = "MMC2 controller slot",
.ocr_mask = 0x00000080,
},
{} /* Terminator */
};
For board-sholes-hsmmc.c, it uses a omap_mmc_platform_data
static struct omap_mmc_platform_data mmc1_data = {
.nr_slots = 1,
.init = hsmmc_late_init,
.cleanup = hsmmc_cleanup,
#ifdef CONFIG_PM
.suspend = hsmmc_suspend,
.resume = hsmmc_resume,
#endif
.dma_mask = 0xffffffff,
.slots[0] = {
.wires = 8,
.set_power = hsmmc_set_power,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34 |
MMC_VDD_165_195,
.name = "first slot",
/* we get car_detect_irq later */
.card_detect_irq = 0,
.card_detect = hsmmc_card_detect,
},
};
Dont have a board-sholes-hsmm.c in l-o[1]... :( so not sure which kernel
you are talking about here.
mainline does it this way:
board files report using omap2_hsmmc_info[2] to hsmmc.c using
omap2_hsmmc_init[3] - hsmmc.c converts them to required datastructures
that omap_hsmmc.c uses..
[1]
http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=tree;f=arch/arm/mach-omap2;h=abedb1903a0d81f33d7614480da0f7a0c78f8f2f;hb=HEAD
[2]
http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=blob;f=arch/arm/mach-omap2/hsmmc.h;h=281e97287adf988493efd1ca94b19ab8588b7aaf;hb=HEAD#l11
[3]
http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=blob;f=arch/arm/mach-omap2/board-omap3beagle.c;h=73689c082b26d0ef38233c0adefc1d0b9d14e8d0;hb=HEAD#l287
--
Regards,
Nishanth Menon
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