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Merge pull request #446 from vikramkanigiri/vk/tzc-400 

Fix TZC-400 peripheral detection
This commit is contained in:
danh-arm 2015-12-02 16:48:20 +00:00
parent 3138dac667 609ebce425
commit f3974ea5b1
2 changed files with 17 additions and 12 deletions
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25
drivers/arm/tzc400/tzc400.c
View File

@ -118,14 +118,13 @@ static inline void tzc_write_region_id_access(uintptr_t base,
REGION_NUM_OFF(region), val);
}
static uint32_t tzc_read_component_id(uintptr_t base)
static unsigned int tzc_read_peripheral_id(uintptr_t base)
{
uint32_t id;
unsigned int id;
id = mmio_read_8(base + CID0_OFF);
id |= (mmio_read_8(base + CID1_OFF) << 8);
id |= (mmio_read_8(base + CID2_OFF) << 16);
id |= (mmio_read_8(base + CID3_OFF) << 24);
id = mmio_read_8(base + PID0_OFF);
/* Masks jep106_id_3_0 part in PID1 */
id |= ((mmio_read_8(base + PID1_OFF) & 0xF) << 8);
return id;
}
@ -166,17 +165,21 @@ static void tzc_set_gate_keeper(uintptr_t base, uint8_t filter, uint32_t val)
void tzc_init(uintptr_t base)
{
uint32_t tzc_id, tzc_build;
unsigned int tzc_id;
unsigned int tzc_build;
assert(base);
/* Assert if already initialised */
assert(!tzc.base);
tzc.base = base;
/*
* We expect to see a tzc400. Check component ID. The TZC-400 TRM shows
* component ID is expected to be "0xB105F00D".
* We expect to see a tzc400. Check peripheral ID.
*/
tzc_id = tzc_read_component_id(tzc.base);
if (tzc_id != TZC400_COMPONENT_ID) {
tzc_id = tzc_read_peripheral_id(tzc.base);
if (tzc_id != TZC400_PERIPHERAL_ID) {
ERROR("TZC : Wrong device ID (0x%x).\n", tzc_id);
panic();
}

4
include/drivers/arm/tzc400.h
View File

@ -147,7 +147,9 @@
#define TZC_REGION_ACCESS_RDWR(id) \
(TZC_REGION_ACCESS_RD(id) | TZC_REGION_ACCESS_WR(id))
#define TZC400_COMPONENT_ID 0xb105f00d
/* Consist of part_number_1 and part_number_0 */
#define TZC400_PERIPHERAL_ID 0x0460
#ifndef __ASSEMBLY__