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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2007 Sascha Hauer, Pengutronix
// SPDX-FileCopyrightText: 2017 Alexander Kurz <akurz@blala.de>
#include <common.h>
#include <envfs.h>
#include <environment.h>
#include <init.h>
#include <io.h>
#include <driver.h>
#include <param.h>
#include <magicvar.h>
#include <partition.h>
#include <libfile.h>
#include <globalvar.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
#include <linux/sizes.h>
#include <usb/fsl_usb2.h>
#include <mach/generic.h>
#include <mach/imx50-regs.h>
#include <mach/imx5.h>
#include <mach/revision.h>
/* 16 byte id for serial number */
#define ATAG_SERIAL16 0x5441000a
/* 16 byte id for a board revision */
#define ATAG_REVISION16 0x5441000b
struct char16_tag {
char data[16];
};
static struct tag *setup_16char_tag(struct tag *params, uint32_t tag,
const char *value)
{
struct char16_tag *target;
target = ((void *) params) + sizeof(struct tag_header);
params->hdr.tag = tag;
params->hdr.size = tag_size(char16_tag);
memcpy(target->data, value, sizeof target->data);
return tag_next(params);
}
static const char *get_env_16char_tag(const char *tag)
{
static const char *default16 = "0000000000000000";
const char *value;
value = getenv(tag);
if (!value) {
pr_err("env var %s not found, using default\n", tag);
return default16;
}
if (strlen(value) != 16) {
pr_err("env var %s: expecting 16 characters, using default\n",
tag);
return default16;
}
pr_info("%s: %s\n", tag, value);
return value;
}
BAREBOX_MAGICVAR(global.board.serial16,
"Pass the kindle Serial as vendor-specific ATAG to linux");
BAREBOX_MAGICVAR(global.board.revision16,
"Pass the kindle BoardId as vendor-specific ATAG to linux");
/* The Kindle Kernel expects two custom ATAGs, ATAG_REVISION16 describing
* the board and ATAG_SERIAL16 to identify the individual device.
*/
static struct tag *kindle_mx50_append_atags(struct tag *params)
{
params = setup_16char_tag(params, ATAG_SERIAL16,
get_env_16char_tag("global.board.serial16"));
params = setup_16char_tag(params, ATAG_REVISION16,
get_env_16char_tag("global.board.revision16"));
return params;
}
static char *serial16;
static char *revision16;
static char *mac;
static void kindle_rev_init(void)
{
int ret;
size_t size;
void *buf;
const char userdata[] = "/dev/mmc2.boot0.userdata";
ret = read_file_2(userdata, &size, &buf, 128);
if (ret && ret != -EFBIG) {
pr_err("Could not read board info from %s\n", userdata);
return;
}
serial16 = xzalloc(17);
revision16 = xzalloc(17);
mac = xzalloc(17);
memcpy(serial16, buf, 16);
memcpy(revision16, buf + 96, 16);
memcpy(mac, buf + 48, 16);
globalvar_add_simple_string("board.serial16", &serial16);
globalvar_add_simple_string("board.revision16", &revision16);
globalvar_add_simple_string("board.mac", &mac);
free(buf);
}
static int is_mx50_kindle(void)
{
return of_machine_is_compatible("amazon,kindle-d01100") ||
of_machine_is_compatible("amazon,kindle-d01200") ||
of_machine_is_compatible("amazon,kindle-ey21");
}
static int kindle_mx50_late_init(void)
{
if (!is_mx50_kindle())
return 0;
armlinux_set_revision(0x50000 | imx_silicon_revision());
/* Compatibility ATAGs for original kernel */
armlinux_set_atag_appender(kindle_mx50_append_atags);
kindle_rev_init();
return 0;
}
late_initcall(kindle_mx50_late_init);
static int kindle_mx50_mem_init(void)
{
if (!is_mx50_kindle())
return 0;
arm_add_mem_device("ram0", MX50_CSD0_BASE_ADDR, SZ_256M);
return 0;
}
mem_initcall(kindle_mx50_mem_init);
static int kindle_mx50_devices_init(void)
{
struct device_d *dev;
if (!is_mx50_kindle())
return 0;
/* Probe the eMMC to allow reading the board serial and revision */
dev = get_device_by_name("mci0");
if (dev)
dev_set_param(dev, "probe", "1");
defaultenv_append_directory(defaultenv_kindle_mx50);
return 0;
}
device_initcall(kindle_mx50_devices_init);
static int kindle_mx50_postcore_init(void)
{
if (!is_mx50_kindle())
return 0;
imx50_init_lowlevel(800);
return 0;
}
postcore_initcall(kindle_mx50_postcore_init);
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