dm: i2c: EEPROM simulator add tests for addr offset mask

Add support for setting the chip address offset mask to EEPROM sumulator
and add tests to test it.

Signed-off-by: Robert Beckett <bob.beckett@collabora.com>
Reviewed-by: Heiko Schocher <hs@denx.de>

diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index f3a8b45..7dd9aa5 100644 (file)
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -72,6 +72,9 @@ void sandbox_i2c_eeprom_set_test_mode(struct udevice *dev,
 
 void sandbox_i2c_eeprom_set_offset_len(struct udevice *dev, int offset_len);
 
+void sandbox_i2c_eeprom_set_chip_addr_offset_mask(struct udevice *dev,
+                                                 uint mask);
+
 uint sanbox_i2c_eeprom_get_prev_addr(struct udevice *dev);
 
 uint sanbox_i2c_eeprom_get_prev_offset(struct udevice *dev);

diff --git a/drivers/misc/i2c_eeprom_emul.c b/drivers/misc/i2c_eeprom_emul.c
index 284267f..16758a0 100644 (file)
--- a/drivers/misc/i2c_eeprom_emul.c
+++ b/drivers/misc/i2c_eeprom_emul.c
@@ -23,6 +23,7 @@ struct sandbox_i2c_flash_plat_data {
        const char *filename;
        int offset_len;         /* Length of an offset in bytes */
        int size;               /* Size of data buffer */
+       uint chip_addr_offset_mask; /* mask of addr bits used for offset */
 };
 
 struct sandbox_i2c_flash {
@@ -46,6 +47,14 @@ void sandbox_i2c_eeprom_set_offset_len(struct udevice *dev, int offset_len)
        plat->offset_len = offset_len;
 }
 
+void sandbox_i2c_eeprom_set_chip_addr_offset_mask(struct udevice *dev,
+                                                 uint mask)
+{
+       struct sandbox_i2c_flash_plat_data *plat = dev_get_platdata(dev);
+
+       plat->chip_addr_offset_mask = mask;
+}
+
 uint sanbox_i2c_eeprom_get_prev_addr(struct udevice *dev)
 {
        struct sandbox_i2c_flash *priv = dev_get_priv(dev);
@@ -64,7 +73,8 @@ static int sandbox_i2c_eeprom_xfer(struct udevice *emul, struct i2c_msg *msg,
                                  int nmsgs)
 {
        struct sandbox_i2c_flash *priv = dev_get_priv(emul);
-       uint offset = 0;
+       struct sandbox_i2c_flash_plat_data *plat = dev_get_platdata(emul);
+       uint offset = msg->addr & plat->chip_addr_offset_mask;
 
        debug("\n%s\n", __func__);
        debug_buffer(0, priv->data, 1, 16, 0);
@@ -73,17 +83,15 @@ static int sandbox_i2c_eeprom_xfer(struct udevice *emul, struct i2c_msg *msg,
        priv->prev_addr = msg->addr;
 
        for (; nmsgs > 0; nmsgs--, msg++) {
-               struct sandbox_i2c_flash_plat_data *plat =
-                               dev_get_platdata(emul);
                int len;
                u8 *ptr;
 
                if (!plat->size)
                        return -ENODEV;
                len = msg->len;
-               debug("   %s: msg->len=%d",
+               debug("   %s: msg->addr=%x msg->len=%d",
                      msg->flags & I2C_M_RD ? "read" : "write",
-                     msg->len);
+                     msg->addr, msg->len);
                if (msg->flags & I2C_M_RD) {
                        if (plat->test_mode == SIE_TEST_MODE_SINGLE_BYTE)
                                len = 1;
@@ -153,6 +161,7 @@ static int sandbox_i2c_eeprom_ofdata_to_platdata(struct udevice *dev)
        }
        plat->test_mode = SIE_TEST_MODE_NONE;
        plat->offset_len = 1;
+       plat->chip_addr_offset_mask = 0;
 
        return 0;
 }

diff --git a/test/dm/i2c.c b/test/dm/i2c.c
index bf5597b..cadbb43 100644 (file)
--- a/test/dm/i2c.c
+++ b/test/dm/i2c.c
@@ -241,3 +241,68 @@ static int dm_test_i2c_offset(struct unit_test_state *uts)
        return 0;
 }
 DM_TEST(dm_test_i2c_offset, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+static int dm_test_i2c_addr_offset(struct unit_test_state *uts)
+{
+       struct udevice *eeprom;
+       struct udevice *dev;
+       u8 buf[5];
+
+       ut_assertok(i2c_get_chip_for_busnum(busnum, chip, 1, &dev));
+
+       /* Do a transfer so we can find the emulator */
+       ut_assertok(dm_i2c_read(dev, 0, buf, 5));
+       ut_assertok(uclass_first_device(UCLASS_I2C_EMUL, &eeprom));
+
+       /* Offset length 0 */
+       sandbox_i2c_eeprom_set_offset_len(eeprom, 0);
+       sandbox_i2c_eeprom_set_chip_addr_offset_mask(eeprom, 0x3);
+       ut_assertok(i2c_set_chip_offset_len(dev, 0));
+       ut_assertok(i2c_set_chip_addr_offset_mask(dev, 0x3));
+       ut_assertok(dm_i2c_write(dev, 0x3, (uint8_t *)"AB", 2));
+       ut_assertok(dm_i2c_read(dev, 0x3, buf, 5));
+       ut_asserteq_mem("AB\0\0\0\0", buf, sizeof(buf));
+       ut_asserteq(0x3, sanbox_i2c_eeprom_get_prev_offset(eeprom));
+       ut_asserteq(chip | 0x3, sanbox_i2c_eeprom_get_prev_addr(eeprom));
+
+       /* Offset length 1 */
+       sandbox_i2c_eeprom_set_offset_len(eeprom, 1);
+       sandbox_i2c_eeprom_set_chip_addr_offset_mask(eeprom, 0x3);
+       ut_assertok(i2c_set_chip_offset_len(dev, 1));
+       ut_assertok(i2c_set_chip_addr_offset_mask(dev, 0x3));
+       ut_assertok(dm_i2c_write(dev, 0x310, (uint8_t *)"AB", 2));
+       ut_assertok(dm_i2c_read(dev, 0x310, buf, 5));
+       ut_asserteq_mem("AB\0\0\0\0", buf, sizeof(buf));
+       ut_asserteq(0x310, sanbox_i2c_eeprom_get_prev_offset(eeprom));
+       ut_asserteq(chip | 0x3, sanbox_i2c_eeprom_get_prev_addr(eeprom));
+
+       /* Offset length 2 */
+       sandbox_i2c_eeprom_set_offset_len(eeprom, 2);
+       sandbox_i2c_eeprom_set_chip_addr_offset_mask(eeprom, 0x3);
+       ut_assertok(i2c_set_chip_offset_len(dev, 2));
+       ut_assertok(i2c_set_chip_addr_offset_mask(dev, 0x3));
+       ut_assertok(dm_i2c_write(dev, 0x32020, (uint8_t *)"AB", 2));
+       ut_assertok(dm_i2c_read(dev, 0x32020, buf, 5));
+       ut_asserteq_mem("AB\0\0\0\0", buf, sizeof(buf));
+       ut_asserteq(0x32020, sanbox_i2c_eeprom_get_prev_offset(eeprom));
+       ut_asserteq(chip | 0x3, sanbox_i2c_eeprom_get_prev_addr(eeprom));
+
+       /* Offset length 3 */
+       sandbox_i2c_eeprom_set_offset_len(eeprom, 3);
+       sandbox_i2c_eeprom_set_chip_addr_offset_mask(eeprom, 0x3);
+       ut_assertok(i2c_set_chip_offset_len(dev, 3));
+       ut_assertok(i2c_set_chip_addr_offset_mask(dev, 0x3));
+       ut_assertok(dm_i2c_write(dev, 0x3303030, (uint8_t *)"AB", 2));
+       ut_assertok(dm_i2c_read(dev, 0x3303030, buf, 5));
+       ut_asserteq_mem("AB\0\0\0\0", buf, sizeof(buf));
+       ut_asserteq(0x3303030, sanbox_i2c_eeprom_get_prev_offset(eeprom));
+       ut_asserteq(chip | 0x3, sanbox_i2c_eeprom_get_prev_addr(eeprom));
+
+       /* Restore defaults */
+       sandbox_i2c_eeprom_set_offset_len(eeprom, 1);
+       sandbox_i2c_eeprom_set_chip_addr_offset_mask(eeprom, 0);
+
+       return 0;
+}
+
+DM_TEST(dm_test_i2c_addr_offset, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);