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#include <common.h>
#include <asm/u-boot.h>
#include <asm/global_data.h>
#include <linux/libfdt.h>
#include <asm/arch/cpu.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <dm.h>
#include "bcm_bootstate.h"
DECLARE_GLOBAL_DATA_PTR;
#define CHECK_NULL(ptr) ptr != NULL //|| init_regs()
typedef void (*set_boot_reason_p)(uint32_t value);
typedef void (*clear_boot_reason_p)(void);
typedef uint32_t (*get_boot_reason_p)(void);
struct spi_reset_reason
{
uint32_t *glb_cntrl;
uint32_t *flash_cntrl;
uint32_t *profile;
};
typedef struct boot_state_data
{
uint32_t *reset_status;
union
{
volatile uint32_t *reset_reason;
struct spi_reset_reason srr;
};
set_boot_reason_p set_boot_reason;
get_boot_reason_p get_boot_reason;
clear_boot_reason_p clear_boot_reason;
}boot_state_data;
boot_state_data __attribute__((section(".data"))) b_state_data;
int bcmbca_get_reset_status(void)
{
int resetStatus = -1;
if(CHECK_NULL((b_state_data.reset_status)))
{
resetStatus = *b_state_data.reset_status & RESET_STATUS_MASK;
}
return resetStatus;
}
unsigned long i=0;
static void bcmbca_set_boot_reason_v1(uint32_t value)
{
if(CHECK_NULL((b_state_data.srr.glb_cntrl)))
{
*b_state_data.srr.glb_cntrl |= DO_NOT_RESET_ON_WATCHDOG;
if(CHECK_NULL((b_state_data.srr.profile)))
{
*b_state_data.srr.profile = value;
}
}
}
static void bcmbca_set_boot_reason_v2(uint32_t value)
{
uint32_t tmp_val;
int retries=0;
if(CHECK_NULL((b_state_data.reset_reason)))
{
while(retries++ < 255)
{
tmp_val=*b_state_data.reset_reason;
dsb();
*b_state_data.reset_reason=value;
dsb();
tmp_val=*b_state_data.reset_reason;
if(tmp_val == value)
break;
}
if(retries > 1)
printf("current value %d value to write %d retried [%d] times to write the reset_reason %s\n", tmp_val, value, retries, (tmp_val == value) ? "success":"fail");
}
}
void bcmbca_set_boot_reason(uint32_t value)
{
if(CHECK_NULL(b_state_data.set_boot_reason))
{
b_state_data.set_boot_reason(value);
}
}
static void bcmbca_clear_boot_reason_v1(void)
{
if(CHECK_NULL((b_state_data.srr.glb_cntrl)))
{
*b_state_data.srr.glb_cntrl &= ~DO_NOT_RESET_ON_WATCHDOG;
if(CHECK_NULL((b_state_data.srr.flash_cntrl)))
{
*b_state_data.srr.flash_cntrl = FLASH_CNTRL_RESET_VAL;
}
if(CHECK_NULL((b_state_data.srr.profile)))
{
*b_state_data.srr.profile = 0;
}
}
}
static void bcmbca_clear_boot_reason_v2(void)
{
uint32_t tmp_val;
int retries=0;
if(CHECK_NULL((b_state_data.reset_reason)))
{
while(retries++ < 255)
{
tmp_val=*b_state_data.reset_reason;
dsb();
*b_state_data.reset_reason &= ~(0x1ffff);
dsb();
tmp_val=*b_state_data.reset_reason;
if((tmp_val & (0x1ffff)) == 0)
break;
}
if(retries > 1)
printf("retried [%d] times to clear the reset_reason %s\n", retries, ((tmp_val & (0x1ffff)) == 0) ? "success":"fail");
}
}
void bcmbca_clear_boot_reason(void)
{
if(CHECK_NULL((b_state_data.clear_boot_reason)))
{
b_state_data.clear_boot_reason();
}
}
static uint32_t bcmbca_get_boot_reason_v1(void)
{
uint32_t rc=-1;
if(CHECK_NULL((b_state_data.srr.profile)))
{
rc=(*b_state_data.reset_status & SW_RESET_STATUS) != 0 ? *b_state_data.srr.profile & 0x1ffff:-1;
}
return rc;
}
static uint32_t bcmbca_get_boot_reason_v2(void)
{
uint32_t rc=-1;
//boot reason is only good in case of sw reset
if((b_state_data.reset_reason != NULL && b_state_data.reset_status != NULL))
{
rc=(*b_state_data.reset_status & SW_RESET_STATUS) != 0 ? *b_state_data.reset_reason & 0x1ffff:-1;
}
return rc;
}
uint32_t bcmbca_get_boot_reason(void)
{
int rc=-1;
if(CHECK_NULL((b_state_data.get_boot_reason)))
{
rc = b_state_data.get_boot_reason();
}
return rc;
}
static int bootstate_v1_probe(struct udevice *dev)
{
struct resource res;
int ret=0;
b_state_data.clear_boot_reason = bcmbca_clear_boot_reason_v1;
b_state_data.set_boot_reason = bcmbca_set_boot_reason_v1;
b_state_data.get_boot_reason = bcmbca_get_boot_reason_v1;
ret = dev_read_resource_byname(dev, "reset_status", &res);
if (!ret) {
b_state_data.reset_status=devm_ioremap(dev, res.start, resource_size(&res));
}
ret = dev_read_resource_byname(dev, "global_control", &res);
if (!ret) {
b_state_data.srr.glb_cntrl=devm_ioremap(dev, res.start, resource_size(&res));
}
ret = dev_read_resource_byname(dev, "flash_control", &res);
if (!ret) {
b_state_data.srr.flash_cntrl=devm_ioremap(dev, res.start, resource_size(&res));
}
ret = dev_read_resource_byname(dev, "mode_control", &res);
if (!ret) {
b_state_data.srr.profile=devm_ioremap(dev, res.start, resource_size(&res));
}
return 0;
}
static int bootstate_v2_probe(struct udevice *dev)
{
struct resource res;
int ret=0;
b_state_data.clear_boot_reason = bcmbca_clear_boot_reason_v2;
b_state_data.set_boot_reason = bcmbca_set_boot_reason_v2;
b_state_data.get_boot_reason = bcmbca_get_boot_reason_v2;
ret = dev_read_resource_byname(dev, "reset_status", &res);
if (!ret) {
b_state_data.reset_status=devm_ioremap(dev, res.start, resource_size(&res));
}
ret = dev_read_resource_byname(dev, "reset_reason", &res);
if (!ret) {
b_state_data.reset_reason=devm_ioremap(dev, res.start, resource_size(&res));
}
return 0;
}
static const struct udevice_id bootstate_v1_ids[] = {
{ .compatible = "brcm,bcmbca-bootstate-v1" },
{ }
};
static const struct udevice_id bootstate_v2_ids[] = {
{ .compatible = "brcm,bcmbca-bootstate-v2" },
{ }
};
U_BOOT_DRIVER(bootstate_v1_drv) = {
.name = "bcm_bootsate_v1",
.id = UCLASS_NOP,
.of_match = bootstate_v1_ids,
.probe = bootstate_v1_probe,
};
U_BOOT_DRIVER(bootstate_v2_drv) = {
.name = "bcm_bootsate_v2",
.id = UCLASS_NOP,
.of_match = bootstate_v2_ids,
.probe = bootstate_v2_probe,
};
void bca_bootstate_probe(void)
{
struct udevice *dev;
memset(&b_state_data, '\0', sizeof(b_state_data));
//for (uclass_first_device_check(UCLASS_MISC, &dev); dev; uclass_next_device_check(&dev));
uclass_get_device_by_driver(UCLASS_NOP, DM_GET_DRIVER(bootstate_v2_drv), &dev);
uclass_get_device_by_driver(UCLASS_NOP, DM_GET_DRIVER(bootstate_v1_drv), &dev);
}
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