- this patch fix MCI support and enable using the SDCard to store the environment. - it is fully copied from imx23-olinuxino.c - tested on i.MX23 EVK RevB1
Signed-off-by: Eric Bénard <[email protected]> --- arch/arm/boards/freescale-mx23-evk/mx23-evk.c | 54 +++++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 4 deletions(-) diff --git a/arch/arm/boards/freescale-mx23-evk/mx23-evk.c b/arch/arm/boards/freescale-mx23-evk/mx23-evk.c index 0c5fa4b..043b62b 100644 --- a/arch/arm/boards/freescale-mx23-evk/mx23-evk.c +++ b/arch/arm/boards/freescale-mx23-evk/mx23-evk.c @@ -26,8 +26,9 @@ #include <mach/mci.h> static struct mxs_mci_platform_data mci_pdata = { - .caps = MMC_MODE_4BIT, + .caps = MMC_MODE_4BIT | MMC_MODE_HS | MMC_MODE_HS_52MHz, .voltages = MMC_VDD_32_33 | MMC_VDD_33_34, /* fixed to 3.3 V */ + .f_min = 400000, }; static const uint32_t pad_setup[] = { @@ -49,9 +50,48 @@ static int mx23_evk_mem_init(void) } mem_initcall(mx23_evk_mem_init); +/** + * Try to register an environment storage on the attached MCI card + * @return 0 on success + * + * We rely on the existence of a usable SD card, already attached to + * our system, to get something like a persistent memory for our environment. + * If this SD card is also the boot media, we can use the second partition + * for our environment purpose (if present!). + */ +static int register_persistant_environment(void) +{ + struct cdev *cdev; + + /* + * The imx23-olinuxino only has one MCI card socket. + * So, we expect its name as "disk0". + */ + cdev = cdev_by_name("disk0"); + if (cdev == NULL) { + pr_err("No MCI card preset\n"); + return -ENODEV; + } + + + + /* MCI card is present, also a useable partition on it? */ + cdev = cdev_by_name("disk0.1"); + if (cdev == NULL) { + pr_err("No second partition available\n"); + pr_info("Please create at least a second partition with" + " 256 kiB...512 kiB in size (your choice)\n"); + return -ENODEV; + } + + /* use the full partition as our persistent environment storage */ + return devfs_add_partition("disk0.1", 0, cdev->size, + DEVFS_PARTITION_FIXED, "env0"); +} + static int mx23_evk_devices_init(void) { - int i; + int i, rc; /* initizalize gpios */ for (i = 0; i < ARRAY_SIZE(pad_setup); i++) @@ -62,8 +102,14 @@ static int mx23_evk_devices_init(void) imx_set_ioclk(480000000); /* enable IOCLK to run at the PLL frequency */ imx_set_sspclk(0, 100000000, 1); - add_generic_device("mxs_mci", 0, NULL, IMX_SSP1_BASE, 0, - IORESOURCE_MEM, &mci_pdata); + + add_generic_device("mxs_mci", DEVICE_ID_DYNAMIC, NULL, IMX_SSP1_BASE, + 0x8000, IORESOURCE_MEM, &mci_pdata); + + rc = register_persistant_environment(); + if (rc != 0) + printf("Cannot create the 'env0' persistant " + "environment storage (%d)\n", rc); return 0; } -- 1.7.11.7 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
