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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>
hifive-unleashed-5.1
Benjamin Herrenschmidt 2018-06-12 15:19:10 +10:00
parent 5a3c2f7656
commit f143304442
1 changed files with 18 additions and 1 deletions
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19
drivers/fsi/fsi-scom.c
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@ -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)