@@ -86,6 +86,7 @@ QTEST_TARGETS=$(foreach TARGET,$(TARGETS), $(if $(check-qtest-$(TARGET)-y), $(TA
check-qtest-$(CONFIG_POSIX)=$(foreach TARGET,$(TARGETS), $(check-qtest-$(TARGET)-y))
qtest-obj-y = tests/libqtest.o $(oslib-obj-y) libqemustub.a
+qtest-obj-y += tests/libi2c.o tests/libi2c-omap.o
$(check-qtest-y): $(qtest-obj-y)
.PHONY: check-help
new file mode 100644
@@ -0,0 +1,166 @@
+/*
+ * QTest I2C driver
+ *
+ * Copyright (c) 2012 Andreas Färber
+ *
+ * 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 "libi2c.h"
+
+#include <glib.h>
+#include <string.h>
+
+#include "osdep.h"
+#include "libqtest.h"
+
+enum OMAPI2CRegisters {
+ OMAP_I2C_REV = 0x00,
+ OMAP_I2C_STAT = 0x08,
+ OMAP_I2C_CNT = 0x18,
+ OMAP_I2C_DATA = 0x1c,
+ OMAP_I2C_CON = 0x24,
+ OMAP_I2C_SA = 0x2c,
+};
+
+enum OMAPI2CSTATBits {
+ OMAP_I2C_STAT_NACK = 1 << 1,
+ OMAP_I2C_STAT_ARDY = 1 << 2,
+ OMAP_I2C_STAT_RRDY = 1 << 3,
+ OMAP_I2C_STAT_XRDY = 1 << 4,
+ OMAP_I2C_STAT_ROVR = 1 << 11,
+ OMAP_I2C_STAT_SBD = 1 << 15,
+};
+
+enum OMAPI2CCONBits {
+ OMAP_I2C_CON_STT = 1 << 0,
+ OMAP_I2C_CON_STP = 1 << 1,
+ OMAP_I2C_CON_TRX = 1 << 9,
+ OMAP_I2C_CON_MST = 1 << 10,
+ OMAP_I2C_CON_BE = 1 << 14,
+ OMAP_I2C_CON_I2C_EN = 1 << 15,
+};
+
+typedef struct OMAPI2C {
+ I2CAdapter parent;
+
+ uint64_t addr;
+} OMAPI2C;
+
+
+static void omap_i2c_set_slave_addr(OMAPI2C *s, uint8_t addr)
+{
+ uint16_t data = addr;
+
+ memwrite(s->addr + OMAP_I2C_SA, &data, 2);
+ memread(s->addr + OMAP_I2C_SA, &data, 2);
+ g_assert_cmphex(data, ==, addr);
+}
+
+static void omap_i2c_send(I2CAdapter *i2c, uint8_t addr,
+ const uint8_t *buf, uint16_t len)
+{
+ OMAPI2C *s = (OMAPI2C *)i2c;
+ uint16_t data;
+
+ omap_i2c_set_slave_addr(s, addr);
+
+ data = len;
+ memwrite(s->addr + OMAP_I2C_CNT, &data, 2);
+
+ data = OMAP_I2C_CON_I2C_EN |
+ OMAP_I2C_CON_TRX |
+ OMAP_I2C_CON_MST |
+ OMAP_I2C_CON_STT |
+ OMAP_I2C_CON_STP;
+ memwrite(s->addr + OMAP_I2C_CON, &data, 2);
+ memread(s->addr + OMAP_I2C_CON, &data, 2);
+ g_assert((data & OMAP_I2C_CON_STP) != 0);
+
+ memread(s->addr + OMAP_I2C_STAT, &data, 2);
+ g_assert((data & OMAP_I2C_STAT_NACK) == 0);
+
+ while (len > 1) {
+ memread(s->addr + OMAP_I2C_STAT, &data, 2);
+ g_assert((data & OMAP_I2C_STAT_XRDY) != 0);
+
+ memwrite(s->addr + OMAP_I2C_DATA, buf, 2);
+ buf = (uint8_t *)buf + 2;
+ len -= 2;
+ }
+ if (len == 1) {
+ memread(s->addr + OMAP_I2C_STAT, &data, 2);
+ g_assert((data & OMAP_I2C_STAT_XRDY) != 0);
+
+ memwrite(s->addr + OMAP_I2C_DATA, buf, 1);
+ }
+
+ memread(s->addr + OMAP_I2C_CON, &data, 2);
+ g_assert((data & OMAP_I2C_CON_STP) == 0);
+}
+
+static void omap_i2c_recv(I2CAdapter *i2c, uint8_t addr,
+ uint8_t *buf, uint16_t len)
+{
+ OMAPI2C *s = (OMAPI2C *)i2c;
+ uint16_t data, stat;
+
+ omap_i2c_set_slave_addr(s, addr);
+
+ data = len;
+ memwrite(s->addr + OMAP_I2C_CNT, &data, 2);
+
+ data = OMAP_I2C_CON_I2C_EN |
+ OMAP_I2C_CON_MST |
+ OMAP_I2C_CON_STT |
+ OMAP_I2C_CON_STP;
+ memwrite(s->addr + OMAP_I2C_CON, &data, 2);
+ memread(s->addr + OMAP_I2C_CON, &data, 2);
+ g_assert((data & OMAP_I2C_CON_STP) == 0);
+
+ memread(s->addr + OMAP_I2C_STAT, &data, 2);
+ g_assert((data & OMAP_I2C_STAT_NACK) == 0);
+
+ memread(s->addr + OMAP_I2C_CNT, &data, 2);
+ g_assert_cmpuint(data, ==, len);
+
+ while (len > 0) {
+ memread(s->addr + OMAP_I2C_STAT, &data, 2);
+ g_assert((data & OMAP_I2C_STAT_RRDY) != 0);
+ g_assert((data & OMAP_I2C_STAT_ROVR) == 0);
+
+ memread(s->addr + OMAP_I2C_DATA, &data, 2);
+
+ memread(s->addr + OMAP_I2C_STAT, &stat, 2);
+ if (unlikely(len == 1)) {
+ *buf = data & 0xf;
+ buf++;
+ len--;
+ } else {
+ memcpy(buf, &data, 2);
+ buf += 2;
+ len -= 2;
+ }
+ }
+
+ memread(s->addr + OMAP_I2C_CON, &data, 2);
+ g_assert((data & OMAP_I2C_CON_STP) == 0);
+}
+
+I2CAdapter *omap_i2c_create(uint64_t addr)
+{
+ OMAPI2C *s = g_malloc0(sizeof(*s));
+ I2CAdapter *i2c = (I2CAdapter *)s;
+ uint16_t data;
+
+ s->addr = addr;
+
+ i2c->send = omap_i2c_send;
+ i2c->recv = omap_i2c_recv;
+
+ /* verify the mmio address by looking for a known signature */
+ memread(addr + OMAP_I2C_REV, &data, 2);
+ g_assert_cmphex(data, ==, 0x34);
+
+ return i2c;
+}
new file mode 100644
@@ -0,0 +1,22 @@
+/*
+ * QTest I2C driver
+ *
+ * Copyright (c) 2012 Andreas Färber
+ *
+ * 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 "libi2c.h"
+#include "libqtest.h"
+
+void i2c_send(I2CAdapter *i2c, uint8_t addr,
+ const uint8_t *buf, uint16_t len)
+{
+ i2c->send(i2c, addr, buf, len);
+}
+
+void i2c_recv(I2CAdapter *i2c, uint8_t addr,
+ uint8_t *buf, uint16_t len)
+{
+ i2c->recv(i2c, addr, buf, len);
+}
new file mode 100644
@@ -0,0 +1,30 @@
+/*
+ * I2C libqos
+ *
+ * Copyright (c) 2012 Andreas Färber
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef LIBQOS_I2C_H
+#define LIBQOS_I2C_H
+
+#include <stdint.h>
+
+typedef struct I2CAdapter I2CAdapter;
+struct I2CAdapter {
+ void (*send)(I2CAdapter *adapter, uint8_t addr,
+ const uint8_t *buf, uint16_t len);
+ void (*recv)(I2CAdapter *adapter, uint8_t addr,
+ uint8_t *buf, uint16_t len);
+};
+
+void i2c_send(I2CAdapter *i2c, uint8_t addr,
+ const uint8_t *buf, uint16_t len);
+void i2c_recv(I2CAdapter *i2c, uint8_t addr,
+ uint8_t *buf, uint16_t len);
+
+/* libi2c-omap.c */
+I2CAdapter *omap_i2c_create(uint64_t addr);
+
+#endif
This adds a simple I2C API and a driver implementation for omap_i2c. Signed-off-by: Andreas Färber <andreas.faerber@web.de> --- tests/Makefile | 1 + tests/libi2c-omap.c | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++ tests/libi2c.c | 22 +++++++ tests/libi2c.h | 30 ++++++++++ 4 Dateien geändert, 219 Zeilen hinzugefügt(+) create mode 100644 tests/libi2c-omap.c create mode 100644 tests/libi2c.c create mode 100644 tests/libi2c.h