#define SAR_CLOCK_FREQ_MODE(v) (((v) & SAR_CLOCK_FREQ_MODE_MASK) >> \
SAR_CLOCK_FREQ_MODE_OFFSET)
+#define AVS_I2C_EEPROM_ADDR 0x57 /* EEPROM */
#define AVS_EN_CTRL_REG (MVEBU_AP_GEN_MGMT_BASE + 0x130)
#define AVS_ENABLE_OFFSET (0)
#define AVS_SOFT_RESET_OFFSET (2)
(0x24 << AVS_LOW_VDD_LIMIT_OFFSET) | \
(0x1 << AVS_SOFT_RESET_OFFSET) | \
(0x1 << AVS_ENABLE_OFFSET))
-
+/* VDD limit is 0.82V for all A3900 devices
+ * AVS offsets are not the same as in A70x0
+ */
#define AVS_A3900_CLK_VALUE ((0x80 << 24) | \
(0x2c2 << 13) | \
(0x2c2 << 3) | \
#define EFUSE_AP_LD0_CLUSTER_DOWN_OFFS 4
+#if MARVELL_SVC_TEST
+#define MVEBU_CP_MPP_CTRL37_OFFS 20
+#define MVEBU_CP_MPP_CTRL38_OFFS 24
+#define MVEBU_CP_MPP_I2C_FUNC 2
+#define MVEBU_MPP_CTRL_MASK 0xf
+#endif
+
/* Return the AP revision of the chip */
static unsigned int ble_get_ap_type(void)
{
* Setup Adaptive Voltage Switching - this is required for some platforms
****************************************************************************
*/
+#if !MARVELL_SVC_TEST
static void ble_plat_avs_config(void)
{
uint32_t freq_mode, device_id;
mmio_write_32(AVS_EN_CTRL_REG, avs_val);
}
}
+#endif
+/******************************************************************************
+ * Update or override current AVS work point value using data stored in EEPROM
+ * This is only required by QA/validation flows and activated by
+ * MARVELL_SVC_TEST flag.
+ *
+ * The function is expected to be called twice.
+ *
+ * First time with AVS value of 0 for testing if the EEPROM requests completely
+ * override the AVS value and bypass the eFuse test
+ *
+ * Second time - with non-zero AVS value obtained from eFuses as an input.
+ * In this case the EEPROM may contain AVS correction value (either positive
+ * or negative) that is added to the input AVS value and returned back for
+ * further processing.
+ ******************************************************************************
+ */
+static uint32_t avs_update_from_eeprom(uint32_t avs_workpoint)
+{
+ uint32_t new_wp = avs_workpoint;
+#if MARVELL_SVC_TEST
+ /* ---------------------------------------------------------------------
+ * EEPROM | Data description (avs_step)
+ * address |
+ * ---------------------------------------------------------------------
+ * 0x120 | AVS workpoint correction value
+ * | if not 0 and not 0xff, correct the AVS taken from eFuse
+ * | by the number of steps indicated by bit[6:0]
+ * | bit[7] defines correction direction.
+ * | If bit[7]=1, add the value from bit[6:0] to AVS workpoint,
+ * | othervise substruct this value from AVS workpoint.
+ * ---------------------------------------------------------------------
+ * 0x121 | AVS workpoint override value
+ * | Override the AVS workpoint with the value stored in this
+ * | byte. When running on AP806, the AVS workpoint is 7 bits
+ * | wide and override value is valid when bit[6:0] holds
+ * | value greater than zero and smaller than 0x33.
+ * | When running on AP807, the AVS workpoint is 10 bits wide.
+ * | Additional 2 MSB bits are supplied by EEPROM byte 0x122.
+ * | AVS override value is valid when byte @ 0x121 and bit[1:0]
+ * | of byte @ 0x122 combined have non-zero value.
+ * ---------------------------------------------------------------------
+ * 0x122 | Extended AVS workpoint override value
+ * | Valid only for AP807 platforms and must be less than 0x4
+ * ---------------------------------------------------------------------
+ */
+ static uint8_t avs_step[3] = {0};
+ uintptr_t reg;
+ uint32_t val;
+ unsigned int ap_type = ble_get_ap_type();
+
+ /* Always happens on second call to this function */
+ if (avs_workpoint != 0) {
+ /* Get correction steps from the EEPROM */
+ if ((avs_step[0] != 0) && (avs_step[0] != 0xff)) {
+ NOTICE("AVS request to step %s by 0x%x from old 0x%x\n",
+ avs_step[0] & 0x80 ? "DOWN" : "UP",
+ avs_step[0] & 0x7f, new_wp);
+ if (avs_step[0] & 0x80)
+ new_wp -= avs_step[0] & 0x7f;
+ else
+ new_wp += avs_step[0] & 0x7f;
+ }
+
+ return new_wp;
+ }
+
+ /* AVS values are located in EEPROM
+ * at CP0 i2c bus #0, device 0x57 offset 0x120
+ * The SDA and SCK pins of CP0 i2c-0: MPP[38:37], i2c function 0x2.
+ */
+ reg = MVEBU_CP_MPP_REGS(0, 4);
+ val = mmio_read_32(reg);
+ val &= ~((MVEBU_MPP_CTRL_MASK << MVEBU_CP_MPP_CTRL37_OFFS) |
+ (MVEBU_MPP_CTRL_MASK << MVEBU_CP_MPP_CTRL38_OFFS));
+ val |= (MVEBU_CP_MPP_I2C_FUNC << MVEBU_CP_MPP_CTRL37_OFFS) |
+ (MVEBU_CP_MPP_I2C_FUNC << MVEBU_CP_MPP_CTRL38_OFFS);
+ mmio_write_32(reg, val);
+
+ /* Init CP0 i2c-0 */
+ i2c_init((void *)(MVEBU_CP0_I2C_BASE));
+
+ /* Read EEPROM only once at the fist call! */
+ i2c_read(AVS_I2C_EEPROM_ADDR, 0x120, 2, avs_step, 3);
+ NOTICE("== SVC test build ==\n");
+ NOTICE("EEPROM holds values 0x%x, 0x%x and 0x%x\n",
+ avs_step[0], avs_step[1], avs_step[2]);
+
+ /* Override the AVS value? */
+ if ((ap_type != CHIP_ID_AP807) && (avs_step[1] < 0x33)) {
+ /* AP806 - AVS is 7 bits */
+ new_wp = avs_step[1];
+
+ } else if (ap_type == CHIP_ID_AP807 && (avs_step[2] < 0x4)) {
+ /* AP807 - AVS is 10 bits */
+ new_wp = avs_step[2];
+ new_wp <<= 8;
+ new_wp |= avs_step[1];
+ }
+
+ if (new_wp == 0)
+ NOTICE("Ignore BAD AVS Override value in EEPROM!\n");
+ else
+ NOTICE("Override AVS by EEPROM value 0x%x\n", new_wp);
+#endif /* MARVELL_SVC_TEST */
+ return new_wp;
+}
/****************************************************************************
* SVC flow - v0.10
uint16_t svc[4], perr[4], i, sw_ver;
unsigned int ap_type;
+ /* Set access to LD0 */
+ avs_workpoint = avs_update_from_eeprom(0);
+ if (avs_workpoint)
+ goto set_aws_wp;
+
/* Set access to LD0 */
reg_val = mmio_read_32(MVEBU_AP_EFUSE_SRV_CTRL_REG);
reg_val &= ~EFUSE_SRV_CTRL_LD_SELECT_OFFS;
sw_ver = (efuse >> EFUSE_AP_LD0_SWREV_OFFS) & EFUSE_AP_LD0_SWREV_MASK;
if (sw_ver < 1) {
NOTICE("SVC: SW Revision 0x%x. SVC is not supported\n", sw_ver);
+#if MARVELL_SVC_TEST
+ NOTICE("SVC_TEST: AVS bypassed\n");
+
+#else
ble_plat_avs_config();
+#endif
return;
}
if (ap_type != CHIP_ID_AP807)
avs_workpoint &= 0x7F;
+ /* Update WP from EEPROM if needed */
+ avs_workpoint = avs_update_from_eeprom(avs_workpoint);
+
+set_aws_wp:
reg_val = mmio_read_32(AVS_EN_CTRL_REG);
NOTICE("SVC: AVS work point changed from 0x%x to 0x%x\n",
(reg_val & AVS_VDD_LOW_LIMIT_MASK) >> AVS_LOW_VDD_LIMIT_OFFSET,
projects / project / bcm63xx / atf.git / commitdiff