Tests the following for both P9 and P10:
- I2C master POR status
- I2C master status after immediate reset
Tests the following for powernv10-ranier only:
- Config pca9552 hotplug device pins as inputs then
Read the INPUT0/1 registers to verify all pins are high
- Connected GPIO pin tests of P10 PCA9552 device. Tests
output of pins 0-4 affect input of pins 5-9 respectively.
- PCA9554 GPIO pins test. Tests input and ouput functionality.
Signed-off-by: Glenn Miles <milesg@linux.vnet.ibm.com>
---
Changes from previous version:
- Changed test to target powernv10-rainier for power10
tests/qtest/meson.build | 1 +
tests/qtest/pnv-host-i2c-test.c | 650 ++++++++++++++++++++++++++++++++
2 files changed, 651 insertions(+)
create mode 100644 tests/qtest/pnv-host-i2c-test.c
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index 47dabf91d0..fbb0bd204c 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -163,6 +163,7 @@ qtests_ppc64 = \
qtests_ppc + \
(config_all_devices.has_key('CONFIG_PSERIES') ? ['device-plug-test'] : []) + \
(config_all_devices.has_key('CONFIG_POWERNV') ? ['pnv-xscom-test'] : []) + \
+ (config_all_devices.has_key('CONFIG_POWERNV') ? ['pnv-host-i2c-test'] : []) + \
(config_all_devices.has_key('CONFIG_PSERIES') ? ['rtas-test'] : []) + \
(slirp.found() ? ['pxe-test'] : []) + \
(config_all_devices.has_key('CONFIG_USB_UHCI') ? ['usb-hcd-uhci-test'] : []) + \
diff --git a/tests/qtest/pnv-host-i2c-test.c b/tests/qtest/pnv-host-i2c-test.c
new file mode 100644
index 0000000000..377525e458
--- /dev/null
+++ b/tests/qtest/pnv-host-i2c-test.c
@@ -0,0 +1,650 @@
+/*
+ * QTest testcase for PowerNV 10 Host I2C Communications
+ *
+ * Copyright (c) 2023, IBM Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "hw/misc/pca9554_regs.h"
+#include "hw/misc/pca9552_regs.h"
+
+#define PPC_BIT(bit) (0x8000000000000000ULL >> (bit))
+#define PPC_BIT32(bit) (0x80000000 >> (bit))
+#define PPC_BIT8(bit) (0x80 >> (bit))
+#define PPC_BITMASK(bs, be) ((PPC_BIT(bs) - PPC_BIT(be)) | PPC_BIT(bs))
+#define PPC_BITMASK32(bs, be) ((PPC_BIT32(bs) - PPC_BIT32(be)) | \
+ PPC_BIT32(bs))
+
+#define MASK_TO_LSH(m) (__builtin_ffsll(m) - 1)
+#define GETFIELD(m, v) (((v) & (m)) >> MASK_TO_LSH(m))
+#define SETFIELD(m, v, val) \
+ (((v) & ~(m)) | ((((typeof(v))(val)) << MASK_TO_LSH(m)) & (m)))
+
+#define P10_XSCOM_BASE 0x000603fc00000000ull
+#define PNV10_CHIP_MAX_I2C 5
+#define PNV10_XSCOM_I2CM_BASE 0xa0000
+#define PNV10_XSCOM_I2CM_SIZE 0x1000
+
+/* I2C FIFO register */
+#define I2C_FIFO_REG 0x4
+#define I2C_FIFO PPC_BITMASK(0, 7)
+
+/* I2C command register */
+#define I2C_CMD_REG 0x5
+#define I2C_CMD_WITH_START PPC_BIT(0)
+#define I2C_CMD_WITH_ADDR PPC_BIT(1)
+#define I2C_CMD_READ_CONT PPC_BIT(2)
+#define I2C_CMD_WITH_STOP PPC_BIT(3)
+#define I2C_CMD_INTR_STEERING PPC_BITMASK(6, 7) /* P9 */
+#define I2C_CMD_INTR_STEER_HOST 1
+#define I2C_CMD_INTR_STEER_OCC 2
+#define I2C_CMD_DEV_ADDR PPC_BITMASK(8, 14)
+#define I2C_CMD_READ_NOT_WRITE PPC_BIT(15)
+#define I2C_CMD_LEN_BYTES PPC_BITMASK(16, 31)
+#define I2C_MAX_TFR_LEN 0xfff0ull
+
+/* I2C mode register */
+#define I2C_MODE_REG 0x6
+#define I2C_MODE_BIT_RATE_DIV PPC_BITMASK(0, 15)
+#define I2C_MODE_PORT_NUM PPC_BITMASK(16, 21)
+#define I2C_MODE_ENHANCED PPC_BIT(28)
+#define I2C_MODE_DIAGNOSTIC PPC_BIT(29)
+#define I2C_MODE_PACING_ALLOW PPC_BIT(30)
+#define I2C_MODE_WRAP PPC_BIT(31)
+
+/* I2C watermark register */
+#define I2C_WATERMARK_REG 0x7
+#define I2C_WATERMARK_HIGH PPC_BITMASK(16, 19)
+#define I2C_WATERMARK_LOW PPC_BITMASK(24, 27)
+
+/*
+ * I2C interrupt mask and condition registers
+ *
+ * NB: The function of 0x9 and 0xa changes depending on whether you're reading
+ * or writing to them. When read they return the interrupt condition bits
+ * and on writes they update the interrupt mask register.
+ *
+ * The bit definitions are the same for all the interrupt registers.
+ */
+#define I2C_INTR_MASK_REG 0x8
+
+#define I2C_INTR_RAW_COND_REG 0x9 /* read */
+#define I2C_INTR_MASK_OR_REG 0x9 /* write*/
+
+#define I2C_INTR_COND_REG 0xa /* read */
+#define I2C_INTR_MASK_AND_REG 0xa /* write */
+
+#define I2C_INTR_ALL PPC_BITMASK(16, 31)
+#define I2C_INTR_INVALID_CMD PPC_BIT(16)
+#define I2C_INTR_LBUS_PARITY_ERR PPC_BIT(17)
+#define I2C_INTR_BKEND_OVERRUN_ERR PPC_BIT(18)
+#define I2C_INTR_BKEND_ACCESS_ERR PPC_BIT(19)
+#define I2C_INTR_ARBT_LOST_ERR PPC_BIT(20)
+#define I2C_INTR_NACK_RCVD_ERR PPC_BIT(21)
+#define I2C_INTR_DATA_REQ PPC_BIT(22)
+#define I2C_INTR_CMD_COMP PPC_BIT(23)
+#define I2C_INTR_STOP_ERR PPC_BIT(24)
+#define I2C_INTR_I2C_BUSY PPC_BIT(25)
+#define I2C_INTR_NOT_I2C_BUSY PPC_BIT(26)
+#define I2C_INTR_SCL_EQ_1 PPC_BIT(28)
+#define I2C_INTR_SCL_EQ_0 PPC_BIT(29)
+#define I2C_INTR_SDA_EQ_1 PPC_BIT(30)
+#define I2C_INTR_SDA_EQ_0 PPC_BIT(31)
+
+/* I2C status register */
+#define I2C_RESET_I2C_REG 0xb /* write */
+#define I2C_RESET_ERRORS 0xc
+#define I2C_STAT_REG 0xb /* read */
+#define I2C_STAT_INVALID_CMD PPC_BIT(0)
+#define I2C_STAT_LBUS_PARITY_ERR PPC_BIT(1)
+#define I2C_STAT_BKEND_OVERRUN_ERR PPC_BIT(2)
+#define I2C_STAT_BKEND_ACCESS_ERR PPC_BIT(3)
+#define I2C_STAT_ARBT_LOST_ERR PPC_BIT(4)
+#define I2C_STAT_NACK_RCVD_ERR PPC_BIT(5)
+#define I2C_STAT_DATA_REQ PPC_BIT(6)
+#define I2C_STAT_CMD_COMP PPC_BIT(7)
+#define I2C_STAT_STOP_ERR PPC_BIT(8)
+#define I2C_STAT_UPPER_THRS PPC_BITMASK(9, 15)
+#define I2C_STAT_ANY_I2C_INTR PPC_BIT(16)
+#define I2C_STAT_PORT_HISTORY_BUSY PPC_BIT(19)
+#define I2C_STAT_SCL_INPUT_LEVEL PPC_BIT(20)
+#define I2C_STAT_SDA_INPUT_LEVEL PPC_BIT(21)
+#define I2C_STAT_PORT_BUSY PPC_BIT(22)
+#define I2C_STAT_INTERFACE_BUSY PPC_BIT(23)
+#define I2C_STAT_FIFO_ENTRY_COUNT PPC_BITMASK(24, 31)
+
+#define I2C_STAT_ANY_ERR (I2C_STAT_INVALID_CMD | I2C_STAT_LBUS_PARITY_ERR | \
+ I2C_STAT_BKEND_OVERRUN_ERR | \
+ I2C_STAT_BKEND_ACCESS_ERR | I2C_STAT_ARBT_LOST_ERR | \
+ I2C_STAT_NACK_RCVD_ERR | I2C_STAT_STOP_ERR)
+
+
+#define I2C_INTR_ACTIVE \
+ ((I2C_STAT_ANY_ERR >> 16) | I2C_INTR_CMD_COMP | I2C_INTR_DATA_REQ)
+
+/* Pseudo-status used for timeouts */
+#define I2C_STAT_PSEUDO_TIMEOUT PPC_BIT(63)
+
+/* I2C extended status register */
+#define I2C_EXTD_STAT_REG 0xc
+#define I2C_EXTD_STAT_FIFO_SIZE PPC_BITMASK(0, 7)
+#define I2C_EXTD_STAT_MSM_CURSTATE PPC_BITMASK(11, 15)
+#define I2C_EXTD_STAT_SCL_IN_SYNC PPC_BIT(16)
+#define I2C_EXTD_STAT_SDA_IN_SYNC PPC_BIT(17)
+#define I2C_EXTD_STAT_S_SCL PPC_BIT(18)
+#define I2C_EXTD_STAT_S_SDA PPC_BIT(19)
+#define I2C_EXTD_STAT_M_SCL PPC_BIT(20)
+#define I2C_EXTD_STAT_M_SDA PPC_BIT(21)
+#define I2C_EXTD_STAT_HIGH_WATER PPC_BIT(22)
+#define I2C_EXTD_STAT_LOW_WATER PPC_BIT(23)
+#define I2C_EXTD_STAT_I2C_BUSY PPC_BIT(24)
+#define I2C_EXTD_STAT_SELF_BUSY PPC_BIT(25)
+#define I2C_EXTD_STAT_I2C_VERSION PPC_BITMASK(27, 31)
+
+/* I2C residual front end/back end length */
+#define I2C_RESIDUAL_LEN_REG 0xd
+#define I2C_RESIDUAL_FRONT_END PPC_BITMASK(0, 15)
+#define I2C_RESIDUAL_BACK_END PPC_BITMASK(16, 31)
+
+/* Port busy register */
+#define I2C_PORT_BUSY_REG 0xe
+#define I2C_SET_S_SCL_REG 0xd
+#define I2C_RESET_S_SCL_REG 0xf
+#define I2C_SET_S_SDA_REG 0x10
+#define I2C_RESET_S_SDA_REG 0x11
+
+#define PNV_I2C_FIFO_SIZE 8
+
+#define SMT 4 /* some tests will break if less than 4 */
+
+typedef enum PnvChipType {
+ PNV_CHIP_POWER8E, /* AKA Murano (default) */
+ PNV_CHIP_POWER8, /* AKA Venice */
+ PNV_CHIP_POWER8NVL, /* AKA Naples */
+ PNV_CHIP_POWER9, /* AKA Nimbus */
+ PNV_CHIP_POWER10,
+} PnvChipType;
+
+typedef struct PnvChip {
+ PnvChipType chip_type;
+ const char *cpu_model;
+ uint64_t xscom_base;
+ uint64_t cfam_id;
+ uint32_t first_core;
+ uint32_t num_i2c;
+} PnvChip;
+
+static const PnvChip pnv_chips[] = {
+ {
+ .chip_type = PNV_CHIP_POWER9,
+ .cpu_model = "POWER9",
+ .xscom_base = 0x000603fc00000000ull,
+ .cfam_id = 0x220d104900008000ull,
+ .first_core = 0x0,
+ .num_i2c = 4,
+ },
+ {
+ .chip_type = PNV_CHIP_POWER10,
+ .cpu_model = "POWER10",
+ .xscom_base = 0x000603fc00000000ull,
+ .cfam_id = 0x120da04900008000ull,
+ .first_core = 0x0,
+ .num_i2c = 4,
+ },
+};
+
+
+typedef struct {
+ QTestState *qts;
+ int engine;
+ int port;
+ uint8_t addr;
+} pnv_i2c_dev_t;
+
+
+static uint64_t pnv_xscom_addr(uint32_t pcba)
+{
+ return P10_XSCOM_BASE | ((uint64_t) pcba << 3);
+}
+
+static uint64_t pnv_i2c_xscom_addr(int engine, uint32_t reg)
+{
+ return pnv_xscom_addr(PNV10_XSCOM_I2CM_BASE +
+ (PNV10_XSCOM_I2CM_SIZE * engine) + reg);
+}
+
+static uint64_t pnv_i2c_xscom_read(QTestState *qts, int engine, uint32_t reg)
+{
+ return qtest_readq(qts, pnv_i2c_xscom_addr(engine, reg));
+}
+
+static void pnv_i2c_xscom_write(QTestState *qts, int engine, uint32_t reg,
+ uint64_t val)
+{
+ qtest_writeq(qts, pnv_i2c_xscom_addr(engine, reg), val);
+}
+
+/* Write len bytes from buf to i2c device with given addr and port */
+static void pnv_i2c_send(pnv_i2c_dev_t *dev, const uint8_t *buf, uint16_t len)
+{
+ int byte_num;
+ uint64_t reg64;
+
+ /* select requested port */
+ reg64 = SETFIELD(I2C_MODE_BIT_RATE_DIV, 0ull, 0x2be);
+ reg64 = SETFIELD(I2C_MODE_PORT_NUM, reg64, dev->port);
+ pnv_i2c_xscom_write(dev->qts, dev->engine, I2C_MODE_REG, reg64);
+
+ /* check status for cmd complete and bus idle */
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_EXTD_STAT_REG);
+ g_assert_cmphex(reg64 & I2C_EXTD_STAT_I2C_BUSY, ==, 0);
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_STAT_REG);
+ g_assert_cmphex(reg64 & (I2C_STAT_ANY_ERR | I2C_STAT_CMD_COMP), ==,
+ I2C_STAT_CMD_COMP);
+
+ /* Send start, with stop, with address and len bytes of data */
+ reg64 = I2C_CMD_WITH_START | I2C_CMD_WITH_ADDR | I2C_CMD_WITH_STOP;
+ reg64 = SETFIELD(I2C_CMD_DEV_ADDR, reg64, dev->addr);
+ reg64 = SETFIELD(I2C_CMD_LEN_BYTES, reg64, len);
+ pnv_i2c_xscom_write(dev->qts, dev->engine, I2C_CMD_REG, reg64);
+
+ /* check status for errors */
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_STAT_REG);
+ g_assert_cmphex(reg64 & I2C_STAT_ANY_ERR, ==, 0);
+
+ /* write data bytes to fifo register */
+ for (byte_num = 0; byte_num < len; byte_num++) {
+ reg64 = SETFIELD(I2C_FIFO, 0ull, buf[byte_num]);
+ pnv_i2c_xscom_write(dev->qts, dev->engine, I2C_FIFO_REG, reg64);
+ }
+
+ /* check status for cmd complete and bus idle */
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_EXTD_STAT_REG);
+ g_assert_cmphex(reg64 & I2C_EXTD_STAT_I2C_BUSY, ==, 0);
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_STAT_REG);
+ g_assert_cmphex(reg64 & (I2C_STAT_ANY_ERR | I2C_STAT_CMD_COMP), ==,
+ I2C_STAT_CMD_COMP);
+}
+
+/* Recieve len bytes into buf from i2c device with given addr and port */
+static void pnv_i2c_recv(pnv_i2c_dev_t *dev, uint8_t *buf, uint16_t len)
+{
+ int byte_num;
+ uint64_t reg64;
+
+ /* select requested port */
+ reg64 = SETFIELD(I2C_MODE_BIT_RATE_DIV, 0ull, 0x2be);
+ reg64 = SETFIELD(I2C_MODE_PORT_NUM, reg64, dev->port);
+ pnv_i2c_xscom_write(dev->qts, dev->engine, I2C_MODE_REG, reg64);
+
+ /* check status for cmd complete and bus idle */
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_EXTD_STAT_REG);
+ g_assert_cmphex(reg64 & I2C_EXTD_STAT_I2C_BUSY, ==, 0);
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_STAT_REG);
+ g_assert_cmphex(reg64 & (I2C_STAT_ANY_ERR | I2C_STAT_CMD_COMP), ==,
+ I2C_STAT_CMD_COMP);
+
+ /* Send start, with stop, with address and len bytes of data */
+ reg64 = I2C_CMD_WITH_START | I2C_CMD_WITH_ADDR |
+ I2C_CMD_WITH_STOP | I2C_CMD_READ_NOT_WRITE;
+ reg64 = SETFIELD(I2C_CMD_DEV_ADDR, reg64, dev->addr);
+ reg64 = SETFIELD(I2C_CMD_LEN_BYTES, reg64, len);
+ pnv_i2c_xscom_write(dev->qts, dev->engine, I2C_CMD_REG, reg64);
+
+ /* check status for errors */
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_STAT_REG);
+ g_assert_cmphex(reg64 & I2C_STAT_ANY_ERR, ==, 0);
+
+ /* Read data bytes from fifo register */
+ for (byte_num = 0; byte_num < len; byte_num++) {
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_FIFO_REG);
+ buf[byte_num] = GETFIELD(I2C_FIFO, reg64);
+ }
+
+ /* check status for cmd complete and bus idle */
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_EXTD_STAT_REG);
+ g_assert_cmphex(reg64 & I2C_EXTD_STAT_I2C_BUSY, ==, 0);
+ reg64 = pnv_i2c_xscom_read(dev->qts, dev->engine, I2C_STAT_REG);
+ g_assert_cmphex(reg64 & (I2C_STAT_ANY_ERR | I2C_STAT_CMD_COMP), ==,
+ I2C_STAT_CMD_COMP);
+}
+
+static void pnv_i2c_pca9554_default_cfg(pnv_i2c_dev_t *dev)
+{
+ uint8_t buf[2];
+
+ /* input register bits are not inverted */
+ buf[0] = PCA9554_POLARITY;
+ buf[1] = 0;
+ pnv_i2c_send(dev, buf, 2);
+
+ /* All pins are inputs */
+ buf[0] = PCA9554_CONFIG;
+ buf[1] = 0xff;
+ pnv_i2c_send(dev, buf, 2);
+
+ /* Output value for when pins are outputs */
+ buf[0] = PCA9554_OUTPUT;
+ buf[1] = 0xff;
+ pnv_i2c_send(dev, buf, 2);
+}
+
+static void pnv_i2c_pca9554_set_pin(pnv_i2c_dev_t *dev, int pin, bool high)
+{
+ uint8_t send_buf[2];
+ uint8_t recv_buf[2];
+ uint8_t mask = 0x1 << pin;
+ uint8_t new_value = ((high) ? 1 : 0) << pin;
+
+ /* read current OUTPUT value */
+ send_buf[0] = PCA9554_OUTPUT;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+
+ /* write new OUTPUT value */
+ send_buf[1] = (recv_buf[0] & ~mask) | new_value;
+ pnv_i2c_send(dev, send_buf, 2);
+
+ /* Update config bit for output */
+ send_buf[0] = PCA9554_CONFIG;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+ send_buf[1] = recv_buf[0] & ~mask;
+ pnv_i2c_send(dev, send_buf, 2);
+}
+
+static uint8_t pnv_i2c_pca9554_read_pins(pnv_i2c_dev_t *dev)
+{
+ uint8_t send_buf[1];
+ uint8_t recv_buf[1];
+ uint8_t inputs;
+ send_buf[0] = PCA9554_INPUT;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+ inputs = recv_buf[0];
+ return inputs;
+}
+
+static void pnv_i2c_pca9554_flip_polarity(pnv_i2c_dev_t *dev)
+{
+ uint8_t recv_buf[1];
+ uint8_t send_buf[2];
+
+ send_buf[0] = PCA9554_POLARITY;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+ send_buf[1] = recv_buf[0] ^ 0xff;
+ pnv_i2c_send(dev, send_buf, 2);
+}
+
+static void pnv_i2c_pca9554_default_inputs(pnv_i2c_dev_t *dev)
+{
+ uint8_t pin_values = pnv_i2c_pca9554_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0xff);
+}
+
+/* Check that setting pin values and polarity changes inputs as expected */
+static void pnv_i2c_pca554_set_pins(pnv_i2c_dev_t *dev)
+{
+ uint8_t pin_values;
+ pnv_i2c_pca9554_set_pin(dev, 0, 0);
+ pin_values = pnv_i2c_pca9554_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0xfe);
+ pnv_i2c_pca9554_flip_polarity(dev);
+ pin_values = pnv_i2c_pca9554_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0x01);
+ pnv_i2c_pca9554_set_pin(dev, 2, 0);
+ pin_values = pnv_i2c_pca9554_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0x05);
+ pnv_i2c_pca9554_flip_polarity(dev);
+ pin_values = pnv_i2c_pca9554_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0xfa);
+ pnv_i2c_pca9554_default_cfg(dev);
+ pin_values = pnv_i2c_pca9554_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0xff);
+}
+
+static void pnv_i2c_pca9552_default_cfg(pnv_i2c_dev_t *dev)
+{
+ uint8_t buf[2];
+ /* configure pwm/psc regs */
+ buf[0] = PCA9552_PSC0;
+ buf[1] = 0xff;
+ pnv_i2c_send(dev, buf, 2);
+ buf[0] = PCA9552_PWM0;
+ buf[1] = 0x80;
+ pnv_i2c_send(dev, buf, 2);
+ buf[0] = PCA9552_PSC1;
+ buf[1] = 0xff;
+ pnv_i2c_send(dev, buf, 2);
+ buf[0] = PCA9552_PWM1;
+ buf[1] = 0x80;
+ pnv_i2c_send(dev, buf, 2);
+
+ /* configure all pins as inputs */
+ buf[0] = PCA9552_LS0;
+ buf[1] = 0x55;
+ pnv_i2c_send(dev, buf, 2);
+ buf[0] = PCA9552_LS1;
+ buf[1] = 0x55;
+ pnv_i2c_send(dev, buf, 2);
+ buf[0] = PCA9552_LS2;
+ buf[1] = 0x55;
+ pnv_i2c_send(dev, buf, 2);
+ buf[0] = PCA9552_LS3;
+ buf[1] = 0x55;
+ pnv_i2c_send(dev, buf, 2);
+}
+
+static void pnv_i2c_pca9552_set_pin(pnv_i2c_dev_t *dev, int pin, bool high)
+{
+ uint8_t send_buf[2];
+ uint8_t recv_buf[2];
+ uint8_t reg = PCA9552_LS0 + (pin / 4);
+ uint8_t shift = (pin % 4) * 2;
+ uint8_t mask = ~(0x3 << shift);
+ uint8_t new_value = ((high) ? 1 : 0) << shift;
+
+ /* read current LSx value */
+ send_buf[0] = reg;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+
+ /* write new value to LSx */
+ send_buf[1] = (recv_buf[0] & mask) | new_value;
+ pnv_i2c_send(dev, send_buf, 2);
+}
+
+static uint16_t pnv_i2c_pca9552_read_pins(pnv_i2c_dev_t *dev)
+{
+ uint8_t send_buf[2];
+ uint8_t recv_buf[2];
+ uint16_t inputs;
+ send_buf[0] = PCA9552_INPUT0;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+ inputs = recv_buf[0];
+ send_buf[0] = PCA9552_INPUT1;
+ pnv_i2c_send(dev, send_buf, 1);
+ pnv_i2c_recv(dev, recv_buf, 1);
+ inputs |= recv_buf[0] << 8;
+ return inputs;
+}
+
+static void pnv_i2c_pca9552_default_inputs(pnv_i2c_dev_t *dev)
+{
+ uint16_t pin_values = pnv_i2c_pca9552_read_pins(dev);
+ g_assert_cmphex(pin_values, ==, 0xffff);
+}
+
+/*
+ * Set pins 0-4 one at a time and verify that pins 5-9 are
+ * set to the same value
+ */
+static void pnv_i2c_pca552_set_pins(pnv_i2c_dev_t *dev)
+{
+ uint16_t pin_values;
+
+ /* set pin 0 low */
+ pnv_i2c_pca9552_set_pin(dev, 0, 0);
+ pin_values = pnv_i2c_pca9552_read_pins(dev);
+
+ /* pins 0 and 5 should be low */
+ g_assert_cmphex(pin_values, ==, 0xffde);
+
+ /* set pin 1 low */
+ pnv_i2c_pca9552_set_pin(dev, 1, 0);
+ pin_values = pnv_i2c_pca9552_read_pins(dev);
+
+ /* pins 0, 1, 5 and 6 should be low */
+ g_assert_cmphex(pin_values, ==, 0xff9c);
+
+ /* set pin 2 low */
+ pnv_i2c_pca9552_set_pin(dev, 2, 0);
+ pin_values = pnv_i2c_pca9552_read_pins(dev);
+
+ /* pins 0, 1, 2, 5, 6 and 7 should be low */
+ g_assert_cmphex(pin_values, ==, 0xff18);
+
+ /* set pin 3 low */
+ pnv_i2c_pca9552_set_pin(dev, 3, 0);
+ pin_values = pnv_i2c_pca9552_read_pins(dev);
+
+ /* pins 0, 1, 2, 3, 5, 6, 7 and 8 should be low */
+ g_assert_cmphex(pin_values, ==, 0xfe10);
+
+ /* set pin 4 low */
+ pnv_i2c_pca9552_set_pin(dev, 4, 0);
+ pin_values = pnv_i2c_pca9552_read_pins(dev);
+
+ /* pins 0, 1, 2, 3, 5, 6, 7, 8 and 9 should be low */
+ g_assert_cmphex(pin_values, ==, 0xfc00);
+
+ /* reset all pins to the high state */
+ pnv_i2c_pca9552_default_cfg(dev);
+ pin_values = pnv_i2c_pca9552_read_pins(dev);
+
+ /* verify all pins went back to the high state */
+ g_assert_cmphex(pin_values, ==, 0xffff);
+}
+
+static void reset_engine(QTestState *qts, int engine)
+{
+ pnv_i2c_xscom_write(qts, engine, I2C_RESET_I2C_REG, 0);
+}
+
+static void check_i2cm_por_regs(QTestState *qts, const PnvChip *chip)
+{
+ int engine;
+ for (engine = 0; engine < chip->num_i2c; engine++) {
+
+ /* Check version in Extended Status Register */
+ uint64_t value = pnv_i2c_xscom_read(qts, engine, I2C_EXTD_STAT_REG);
+ g_assert_cmphex(value & I2C_EXTD_STAT_I2C_VERSION, ==, 0x1700000000);
+
+ /* Check for command complete and bus idle in Status Register */
+ value = pnv_i2c_xscom_read(qts, engine, I2C_STAT_REG);
+ g_assert_cmphex(value & (I2C_STAT_ANY_ERR | I2C_STAT_CMD_COMP),
+ ==,
+ I2C_STAT_CMD_COMP);
+ }
+}
+
+static void reset_all(QTestState *qts, const PnvChip *chip)
+{
+ int engine;
+ for (engine = 0; engine < chip->num_i2c; engine++) {
+ reset_engine(qts, engine);
+ pnv_i2c_xscom_write(qts, engine, I2C_MODE_REG, 0x02be040000000000);
+ }
+}
+
+static void test_host_i2c(const void *data)
+{
+ const PnvChip *chip = data;
+ QTestState *qts;
+ const char *machine = "powernv8";
+ pnv_i2c_dev_t pca9552;
+ pnv_i2c_dev_t pca9554;
+
+ if (chip->chip_type == PNV_CHIP_POWER9) {
+ machine = "powernv9";
+ } else if (chip->chip_type == PNV_CHIP_POWER10) {
+ machine = "powernv10-rainier";
+ }
+
+ qts = qtest_initf("-M %s -smp %d,cores=1,threads=%d -nographic "
+ "-nodefaults -serial mon:stdio -S "
+ "-d guest_errors",
+ machine, SMT, SMT);
+
+ /* Check the I2C master status registers after POR */
+ check_i2cm_por_regs(qts, chip);
+
+ /* Now do a forced "immediate" reset on all engines */
+ reset_all(qts, chip);
+
+ /* Check that the status values are still good */
+ check_i2cm_por_regs(qts, chip);
+
+ /* P9 doesn't have any i2c devices attached at this time */
+ if (chip->chip_type != PNV_CHIP_POWER10) {
+ qtest_quit(qts);
+ return;
+ }
+
+ /* Initialize for a P10 pca9552 hotplug device */
+ pca9552.qts = qts;
+ pca9552.engine = 2;
+ pca9552.port = 1;
+ pca9552.addr = 0x63;
+
+ /* Set all pca9552 pins as inputs */
+ pnv_i2c_pca9552_default_cfg(&pca9552);
+
+ /* Check that all pins of the pca9552 are high */
+ pnv_i2c_pca9552_default_inputs(&pca9552);
+
+ /* perform individual pin tests */
+ pnv_i2c_pca552_set_pins(&pca9552);
+
+ /* Initialize for a P10 pca9554 CableCard Presence detection device */
+ pca9554.qts = qts;
+ pca9554.engine = 2;
+ pca9554.port = 1;
+ pca9554.addr = 0x25;
+
+ /* Set all pca9554 pins as inputs */
+ pnv_i2c_pca9554_default_cfg(&pca9554);
+
+ /* Check that all pins of the pca9554 are high */
+ pnv_i2c_pca9554_default_inputs(&pca9554);
+
+ /* perform individual pin tests */
+ pnv_i2c_pca554_set_pins(&pca9554);
+
+ qtest_quit(qts);
+}
+
+static void add_test(const char *name, void (*test)(const void *data))
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pnv_chips); i++) {
+ char *tname = g_strdup_printf("pnv-xscom/%s/%s", name,
+ pnv_chips[i].cpu_model);
+ qtest_add_data_func(tname, &pnv_chips[i], test);
+ g_free(tname);
+ }
+}
+
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+
+ add_test("host-i2c", test_host_i2c);
+ return g_test_run();
+}
--
2.31.1© 2016 - 2024 Red Hat, Inc.