2009-12-03 13:16:33 +00:00
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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2010-10-11 11:01:08 +00:00
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#include <init.h>
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2009-12-03 13:16:33 +00:00
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#include <common.h>
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2011-07-27 10:49:08 +00:00
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#include <sizes.h>
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2011-03-10 13:47:23 +00:00
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#include <environment.h>
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2011-09-22 17:02:57 +00:00
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#include <io.h>
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2010-10-11 11:01:08 +00:00
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#include <mach/imx51-regs.h>
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2009-12-03 13:16:33 +00:00
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#include "gpio.h"
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void *imx_gpio_base[] = {
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2011-08-15 08:50:16 +00:00
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(void *)0x73f84000,
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2009-12-03 13:16:33 +00:00
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(void *)0x73f88000,
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(void *)0x73f8c000,
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(void *)0x73f90000,
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};
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int imx_gpio_count = ARRAY_SIZE(imx_gpio_base) * 32;
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2010-10-11 11:01:08 +00:00
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#define SI_REV 0x48
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static u32 mx51_silicon_revision;
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static char *mx51_rev_string = "unknown";
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int imx_silicon_revision(void)
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{
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return mx51_silicon_revision;
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}
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static int query_silicon_revision(void)
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{
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void __iomem *rom = MX51_IROM_BASE_ADDR;
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u32 rev;
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rev = readl(rom + SI_REV);
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switch (rev) {
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case 0x1:
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mx51_silicon_revision = MX51_CHIP_REV_1_0;
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mx51_rev_string = "1.0";
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break;
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case 0x2:
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mx51_silicon_revision = MX51_CHIP_REV_1_1;
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mx51_rev_string = "1.1";
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break;
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case 0x10:
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mx51_silicon_revision = MX51_CHIP_REV_2_0;
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mx51_rev_string = "2.0";
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break;
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case 0x20:
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mx51_silicon_revision = MX51_CHIP_REV_3_0;
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mx51_rev_string = "3.0";
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break;
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default:
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mx51_silicon_revision = 0;
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}
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return 0;
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}
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core_initcall(query_silicon_revision);
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static int imx51_print_silicon_rev(void)
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{
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printf("detected i.MX51 rev %s\n", mx51_rev_string);
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return 0;
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}
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device_initcall(imx51_print_silicon_rev);
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2011-07-27 10:49:08 +00:00
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static int imx51_init(void)
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{
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add_generic_device("imx_iim", 0, NULL, MX51_IIM_BASE_ADDR, SZ_4K,
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IORESOURCE_MEM, NULL);
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return 0;
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}
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coredevice_initcall(imx51_init);
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2011-03-10 13:47:23 +00:00
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/*
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* Saves the boot source media into the $barebox_loc enviroment variable
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*
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* This information is useful for barebox init scripts as we can then easily
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* use a kernel image stored on the same media that we launch barebox with
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* (for example).
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*
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* imx25 and imx35 can boot into barebox from several media such as
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* nand, nor, mmc/sd cards, serial roms. "mmc" is used to represent several
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* sources as its impossible to distinguish between them.
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*
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* Some sources such as serial roms can themselves have 3 different boot
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* possibilities (i2c1, i2c2 etc). It is assumed that any board will
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* only be using one of these at any one time.
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*
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* Note also that I suspect that the boot source pins are only sampled at
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* power up.
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*/
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#define SRC_SBMR 0x4
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#define SBMR_BT_MEM_TYPE_SHIFT 7
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#define SBMR_BT_MEM_CTL_SHIFT 0
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#define SBMR_BMOD_SHIFT 14
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static int imx51_boot_save_loc(void)
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{
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const char *bareboxloc = NULL;
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uint32_t reg;
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unsigned int ctrl, type;
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/* [CTRL][TYPE] */
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const char *const locations[4][4] = {
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{ /* CTRL = WEIM */
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"nor",
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NULL,
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"onenand",
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NULL,
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}, { /* CTRL == NAND */
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"nand",
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"nand",
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"nand",
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"nand",
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}, { /* CTRL == reserved */
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NULL,
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NULL,
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NULL,
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NULL,
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}, { /* CTRL == expansion */
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"mmc",
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NULL,
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"i2c",
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"spi",
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}
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};
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reg = readl(MX51_SRC_BASE_ADDR + SRC_SBMR);
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switch ((reg >> SBMR_BMOD_SHIFT) & 0x3) {
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case 0:
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case 2:
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/* internal boot */
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ctrl = (reg >> SBMR_BT_MEM_CTL_SHIFT) & 0x3;
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type = (reg >> SBMR_BT_MEM_TYPE_SHIFT) & 0x3;
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bareboxloc = locations[ctrl][type];
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break;
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case 1:
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/* reserved */
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bareboxloc = "unknown";
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break;
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case 3:
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bareboxloc = "serial";
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break;
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}
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if (bareboxloc) {
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setenv("barebox_loc", bareboxloc);
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export("barebox_loc");
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}
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return 0;
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}
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coredevice_initcall(imx51_boot_save_loc);
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