Add qemu 2.4.0

[kvmfornfv.git] / qemu / tests / libqos / i2c-omap.c

diff --git a/qemu/tests/libqos/i2c-omap.c b/qemu/tests/libqos/i2c-omap.c
new file mode 100644 (file)
index 0000000..3d4d45d
--- /dev/null
+++ b/qemu/tests/libqos/i2c-omap.c
@@ -0,0 +1,173 @@
+/*
+ * 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 "libqos/i2c.h"
+
+#include <glib.h>
+#include <string.h>
+
+#include "qemu/osdep.h"
+#include "qemu/bswap.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;
+
+    writew(s->addr + OMAP_I2C_SA, data);
+    data = readw(s->addr + OMAP_I2C_SA);
+    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;
+    writew(s->addr + OMAP_I2C_CNT, data);
+
+    data = OMAP_I2C_CON_I2C_EN |
+           OMAP_I2C_CON_TRX |
+           OMAP_I2C_CON_MST |
+           OMAP_I2C_CON_STT |
+           OMAP_I2C_CON_STP;
+    writew(s->addr + OMAP_I2C_CON, data);
+    data = readw(s->addr + OMAP_I2C_CON);
+    g_assert((data & OMAP_I2C_CON_STP) != 0);
+
+    data = readw(s->addr + OMAP_I2C_STAT);
+    g_assert((data & OMAP_I2C_STAT_NACK) == 0);
+
+    while (len > 1) {
+        data = readw(s->addr + OMAP_I2C_STAT);
+        g_assert((data & OMAP_I2C_STAT_XRDY) != 0);
+
+        data = buf[0] | ((uint16_t)buf[1] << 8);
+        writew(s->addr + OMAP_I2C_DATA, data);
+        buf = (uint8_t *)buf + 2;
+        len -= 2;
+    }
+    if (len == 1) {
+        data = readw(s->addr + OMAP_I2C_STAT);
+        g_assert((data & OMAP_I2C_STAT_XRDY) != 0);
+
+        data = buf[0];
+        writew(s->addr + OMAP_I2C_DATA, data);
+    }
+
+    data = readw(s->addr + OMAP_I2C_CON);
+    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;
+    writew(s->addr + OMAP_I2C_CNT, data);
+
+    data = OMAP_I2C_CON_I2C_EN |
+           OMAP_I2C_CON_MST |
+           OMAP_I2C_CON_STT |
+           OMAP_I2C_CON_STP;
+    writew(s->addr + OMAP_I2C_CON, data);
+    data = readw(s->addr + OMAP_I2C_CON);
+    g_assert((data & OMAP_I2C_CON_STP) == 0);
+
+    data = readw(s->addr + OMAP_I2C_STAT);
+    g_assert((data & OMAP_I2C_STAT_NACK) == 0);
+
+    data = readw(s->addr + OMAP_I2C_CNT);
+    g_assert_cmpuint(data, ==, len);
+
+    while (len > 0) {
+        data = readw(s->addr + OMAP_I2C_STAT);
+        g_assert((data & OMAP_I2C_STAT_RRDY) != 0);
+        g_assert((data & OMAP_I2C_STAT_ROVR) == 0);
+
+        data = readw(s->addr + OMAP_I2C_DATA);
+
+        stat = readw(s->addr + OMAP_I2C_STAT);
+
+        if (unlikely(len == 1)) {
+            g_assert((stat & OMAP_I2C_STAT_SBD) != 0);
+
+            buf[0] = data & 0xff;
+            buf++;
+            len--;
+        } else {
+            buf[0] = data & 0xff;
+            buf[1] = data >> 8;
+            buf += 2;
+            len -= 2;
+        }
+    }
+
+    data = readw(s->addr + OMAP_I2C_CON);
+    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 */
+    data = readw(addr + OMAP_I2C_REV);
+    g_assert_cmphex(data, ==, 0x34);
+
+    return i2c;
+}