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// SPDX-License-Identifier: GPL-2.0-or-later
#include <common.h>
#include <init.h>
#include <mach/imx/imx25-regs.h>
#include <mach/imx/iim.h>
#include <io.h>
#include <mach/imx/weim.h>
#include <mach/imx/generic.h>
#include <linux/sizes.h>
#define MX25_BOOTROM_HAB_MAGIC 0x3c95cac6
#define MX25_DRYICE_GPR 0x3c
/* IIM fuse definitions */
#define IIM_BANK0_BASE (MX25_IIM_BASE_ADDR + 0x800)
#define IIM_BANK1_BASE (MX25_IIM_BASE_ADDR + 0xc00)
#define IIM_BANK2_BASE (MX25_IIM_BASE_ADDR + 0x1000)
#define IIM_UID (IIM_BANK0_BASE + 0x20)
#define IIM_MAC_ADDR (IIM_BANK0_BASE + 0x68)
u64 imx_uid(void)
{
u64 uid = 0;
int i;
/*
* This code assumes that the UID is stored little-endian. The
* Freescale AN3682 document is silent about the endianess, but
* experimentation shows that this is the case. All other multi-byte
* values in IIM are big-endian as per AN3682.
*/
for (i = 0; i < 8; i++)
uid |= (u64)readb(IIM_UID + i*4) << (i*8);
return uid;
}
int imx25_init(void)
{
int val;
imx25_boot_save_loc();
add_generic_device("imx25-esdctl", 0, NULL, MX25_ESDCTL_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
/*
* When the i.MX25 is used with internal boot, the boot ROM always
* performs some HAB actions. These will copy the value from DryIce
* GPR (0x53ffc03c) to a location in SRAM (0x78001734) and then overwrites
* the GPR with 0x3c95cac6.
* After the HAB routine is done, the boot ROM should copy the previously
* saved value from SRAM back to the GPR. The last step is not done.
* The boot ROM is officially broken in this regard.
* This renders the Non-volatile memory to a Non-Non-volatile memory.
* To still be able to use the GPR for its intended purpose, copy the
* saved SRAM value back manually.
*/
/*
* When the value in the GPR matches the value the ROM has written there then
* we have to copy back the value from the SRAM back to the GPR.
*/
val = readl(MX25_DRYICE_BASE_ADDR + MX25_DRYICE_GPR);
if (val == MX25_BOOTROM_HAB_MAGIC) {
val = readl(MX25_IRAM_BASE_ADDR + 0x1734);
writel(val, MX25_DRYICE_BASE_ADDR + MX25_DRYICE_GPR);
}
return 0;
}
int imx25_devices_init(void)
{
add_generic_device("imx_iim", 0, NULL, MX25_IIM_BASE_ADDR, SZ_4K,
IORESOURCE_MEM, NULL);
add_generic_device("imx-iomuxv3", 0, NULL, MX25_IOMUXC_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx25-ccm", 0, NULL, MX25_CCM_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx31-gpt", 0, NULL, MX25_GPT1_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx31-gpio", 0, NULL, MX25_GPIO1_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx31-gpio", 1, NULL, MX25_GPIO2_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx31-gpio", 2, NULL, MX25_GPIO3_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx31-gpio", 3, NULL, MX25_GPIO4_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx21-wdt", 0, NULL, MX25_WDOG_BASE_ADDR, 0x1000, IORESOURCE_MEM, NULL);
add_generic_device("imx25-usb-misc", 0, NULL, MX25_USB_OTG_BASE_ADDR + 0x600, 0x100, IORESOURCE_MEM, NULL);
return 0;
}
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