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Subject[RFC PATCH 4/5] fsi/scom: Add register definitions
Date
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>
---
drivers/fsi/fsi-scom.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/fsi/fsi-scom.c b/drivers/fsi/fsi-scom.c
index 6ddfb6021420..e98573ecdae1 100644
--- 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)
--
2.17.0
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