fsi: scom: Add register definitions

Add a few more register and bit definitions, also define and use
SCOM_READ_CMD (which is 0 but it makes the code clearer)

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Eddie James <eajames@linux.vnet.ibm.com>

diff --git a/drivers/fsi/fsi-scom.c b/drivers/fsi/fsi-scom.c
index 6ddfb60..e98573e 100644 (file)
--- a/drivers/fsi/fsi-scom.c
+++ b/drivers/fsi/fsi-scom.c
@@ -30,8 +30,25 @@
 #define SCOM_DATA0_REG         0x00
 #define SCOM_DATA1_REG         0x04
 #define SCOM_CMD_REG           0x08
+#define SCOM_FSI2PIB_RESET_REG 0x18
+#define SCOM_STATUS_REG                0x1C /* Read */
+#define SCOM_PIB_RESET_REG     0x1C /* Write */
 
+/* Command register */
 #define SCOM_WRITE_CMD         0x80000000
+#define SCOM_READ_CMD          0x00000000
+
+/* Status register bits */
+#define SCOM_STATUS_ERR_SUMMARY                0x80000000
+#define SCOM_STATUS_PROTECTION         0x01000000
+#define SCOM_STATUS_PIB_ABORT          0x00100000
+#define SCOM_STATUS_PIB_RESP_MASK      0x00007000
+#define SCOM_STATUS_PIB_RESP_SHIFT     12
+
+#define SCOM_STATUS_ANY_ERR            (SCOM_STATUS_ERR_SUMMARY | \
+                                        SCOM_STATUS_PROTECTION | \
+                                        SCOM_STATUS_PIB_ABORT | \
+                                        SCOM_STATUS_PIB_RESP_MASK)
 
 struct scom_device {
        struct list_head link;
@@ -85,7 +102,7 @@ static int get_scom(struct scom_device *scom_dev, uint64_t *value,
 
        mutex_lock(&scom_dev->lock);
        *value = 0ULL;
-       data = cpu_to_be32(addr);
+       data = cpu_to_be32(SCOM_READ_CMD | addr);
        rc = fsi_device_write(scom_dev->fsi_dev, SCOM_CMD_REG, &data,
                                sizeof(uint32_t));
        if (rc)