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path: root/drivers/fsi/fsi-occ.c
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Diffstat (limited to 'drivers/fsi/fsi-occ.c')
-rw-r--r--drivers/fsi/fsi-occ.c125
1 files changed, 91 insertions, 34 deletions
diff --git a/drivers/fsi/fsi-occ.c b/drivers/fsi/fsi-occ.c
index 9eeb856c8905..10ca2e290655 100644
--- a/drivers/fsi/fsi-occ.c
+++ b/drivers/fsi/fsi-occ.c
@@ -14,6 +14,7 @@
#include <linux/mutex.h>
#include <linux/fsi-occ.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/slab.h>
@@ -24,8 +25,13 @@
#define OCC_CMD_DATA_BYTES 4090
#define OCC_RESP_DATA_BYTES 4089
-#define OCC_SRAM_CMD_ADDR 0xFFFBE000
-#define OCC_SRAM_RSP_ADDR 0xFFFBF000
+#define OCC_P9_SRAM_CMD_ADDR 0xFFFBE000
+#define OCC_P9_SRAM_RSP_ADDR 0xFFFBF000
+
+#define OCC_P10_SRAM_CMD_ADDR 0xFFFFD000
+#define OCC_P10_SRAM_RSP_ADDR 0xFFFFE000
+
+#define OCC_P10_SRAM_MODE 0x58 /* Normal mode, OCB channel 2 */
/*
* Assume we don't have much FFDC, if we do we'll overflow and
@@ -37,11 +43,14 @@
#define OCC_TIMEOUT_MS 1000
#define OCC_CMD_IN_PRG_WAIT_MS 50
+enum versions { occ_p9, occ_p10 };
+
struct occ {
struct device *dev;
struct device *sbefifo;
char name[32];
int idx;
+ enum versions version;
struct miscdevice mdev;
struct mutex occ_lock;
};
@@ -235,29 +244,43 @@ static int occ_verify_checksum(struct occ_response *resp, u16 data_length)
return 0;
}
-static int occ_getsram(struct occ *occ, u32 address, void *data, ssize_t len)
+static int occ_getsram(struct occ *occ, u32 offset, void *data, ssize_t len)
{
u32 data_len = ((len + 7) / 8) * 8; /* must be multiples of 8 B */
- size_t resp_len, resp_data_len;
- __be32 *resp, cmd[5];
- int rc;
+ size_t cmd_len, resp_len, resp_data_len;
+ __be32 *resp, cmd[6];
+ int idx = 0, rc;
/*
* Magic sequence to do SBE getsram command. SBE will fetch data from
* specified SRAM address.
*/
- cmd[0] = cpu_to_be32(0x5);
+ switch (occ->version) {
+ default:
+ case occ_p9:
+ cmd_len = 5;
+ cmd[2] = cpu_to_be32(1); /* Normal mode */
+ cmd[3] = cpu_to_be32(OCC_P9_SRAM_RSP_ADDR + offset);
+ break;
+ case occ_p10:
+ idx = 1;
+ cmd_len = 6;
+ cmd[2] = cpu_to_be32(OCC_P10_SRAM_MODE);
+ cmd[3] = 0;
+ cmd[4] = cpu_to_be32(OCC_P10_SRAM_RSP_ADDR + offset);
+ break;
+ }
+
+ cmd[0] = cpu_to_be32(cmd_len);
cmd[1] = cpu_to_be32(SBEFIFO_CMD_GET_OCC_SRAM);
- cmd[2] = cpu_to_be32(1);
- cmd[3] = cpu_to_be32(address);
- cmd[4] = cpu_to_be32(data_len);
+ cmd[4 + idx] = cpu_to_be32(data_len);
resp_len = (data_len >> 2) + OCC_SBE_STATUS_WORDS;
resp = kzalloc(resp_len << 2, GFP_KERNEL);
if (!resp)
return -ENOMEM;
- rc = sbefifo_submit(occ->sbefifo, cmd, 5, resp, &resp_len);
+ rc = sbefifo_submit(occ->sbefifo, cmd, cmd_len, resp, &resp_len);
if (rc)
goto free;
@@ -287,20 +310,21 @@ free:
return rc;
}
-static int occ_putsram(struct occ *occ, u32 address, const void *data,
- ssize_t len)
+static int occ_putsram(struct occ *occ, const void *data, ssize_t len)
{
size_t cmd_len, buf_len, resp_len, resp_data_len;
u32 data_len = ((len + 7) / 8) * 8; /* must be multiples of 8 B */
__be32 *buf;
- int rc;
+ int idx = 0, rc;
+
+ cmd_len = (occ->version == occ_p10) ? 6 : 5;
/*
* We use the same buffer for command and response, make
* sure it's big enough
*/
resp_len = OCC_SBE_STATUS_WORDS;
- cmd_len = (data_len >> 2) + 5;
+ cmd_len += data_len >> 2;
buf_len = max(cmd_len, resp_len);
buf = kzalloc(buf_len << 2, GFP_KERNEL);
if (!buf)
@@ -312,11 +336,23 @@ static int occ_putsram(struct occ *occ, u32 address, const void *data,
*/
buf[0] = cpu_to_be32(cmd_len);
buf[1] = cpu_to_be32(SBEFIFO_CMD_PUT_OCC_SRAM);
- buf[2] = cpu_to_be32(1);
- buf[3] = cpu_to_be32(address);
- buf[4] = cpu_to_be32(data_len);
- memcpy(&buf[5], data, len);
+ switch (occ->version) {
+ default:
+ case occ_p9:
+ buf[2] = cpu_to_be32(1); /* Normal mode */
+ buf[3] = cpu_to_be32(OCC_P9_SRAM_CMD_ADDR);
+ break;
+ case occ_p10:
+ idx = 1;
+ buf[2] = cpu_to_be32(OCC_P10_SRAM_MODE);
+ buf[3] = 0;
+ buf[4] = cpu_to_be32(OCC_P10_SRAM_CMD_ADDR);
+ break;
+ }
+
+ buf[4 + idx] = cpu_to_be32(data_len);
+ memcpy(&buf[5 + idx], data, len);
rc = sbefifo_submit(occ->sbefifo, buf, cmd_len, buf, &resp_len);
if (rc)
@@ -356,21 +392,35 @@ free:
static int occ_trigger_attn(struct occ *occ)
{
__be32 buf[OCC_SBE_STATUS_WORDS];
- size_t resp_len, resp_data_len;
- int rc;
+ size_t cmd_len, resp_len, resp_data_len;
+ int idx = 0, rc;
- BUILD_BUG_ON(OCC_SBE_STATUS_WORDS < 7);
+ BUILD_BUG_ON(OCC_SBE_STATUS_WORDS < 8);
resp_len = OCC_SBE_STATUS_WORDS;
- buf[0] = cpu_to_be32(0x5 + 0x2); /* Chip-op length in words */
+ switch (occ->version) {
+ default:
+ case occ_p9:
+ cmd_len = 7;
+ buf[2] = cpu_to_be32(3); /* Circular mode */
+ buf[3] = 0;
+ break;
+ case occ_p10:
+ idx = 1;
+ cmd_len = 8;
+ buf[2] = cpu_to_be32(0xd0); /* Circular mode, OCB Channel 1 */
+ buf[3] = 0;
+ buf[4] = 0;
+ break;
+ }
+
+ buf[0] = cpu_to_be32(cmd_len); /* Chip-op length in words */
buf[1] = cpu_to_be32(SBEFIFO_CMD_PUT_OCC_SRAM);
- buf[2] = cpu_to_be32(0x3); /* Mode: Circular */
- buf[3] = cpu_to_be32(0x0); /* Address: ignore in mode 3 */
- buf[4] = cpu_to_be32(0x8); /* Data length in bytes */
- buf[5] = cpu_to_be32(0x20010000); /* Trigger OCC attention */
- buf[6] = 0;
+ buf[4 + idx] = cpu_to_be32(8); /* Data length in bytes */
+ buf[5 + idx] = cpu_to_be32(0x20010000); /* Trigger OCC attention */
+ buf[6 + idx] = 0;
- rc = sbefifo_submit(occ->sbefifo, buf, 7, buf, &resp_len);
+ rc = sbefifo_submit(occ->sbefifo, buf, cmd_len, buf, &resp_len);
if (rc)
goto error;
@@ -429,7 +479,7 @@ int fsi_occ_submit(struct device *dev, const void *request, size_t req_len,
/* Extract the seq_no from the command (first byte) */
seq_no = *(const u8 *)request;
- rc = occ_putsram(occ, OCC_SRAM_CMD_ADDR, request, req_len);
+ rc = occ_putsram(occ, request, req_len);
if (rc)
goto done;
@@ -440,7 +490,7 @@ int fsi_occ_submit(struct device *dev, const void *request, size_t req_len,
/* Read occ response header */
start = jiffies;
do {
- rc = occ_getsram(occ, OCC_SRAM_RSP_ADDR, resp, 8);
+ rc = occ_getsram(occ, 0, resp, 8);
if (rc)
goto done;
@@ -476,8 +526,7 @@ int fsi_occ_submit(struct device *dev, const void *request, size_t req_len,
/* Grab the rest */
if (resp_data_length > 1) {
/* already got 3 bytes resp, also need 2 bytes checksum */
- rc = occ_getsram(occ, OCC_SRAM_RSP_ADDR + 8,
- &resp->data[3], resp_data_length - 1);
+ rc = occ_getsram(occ, 8, &resp->data[3], resp_data_length - 1);
if (rc)
goto done;
}
@@ -517,6 +566,7 @@ static int occ_probe(struct platform_device *pdev)
if (!occ)
return -ENOMEM;
+ occ->version = (uintptr_t)of_device_get_match_data(dev);
occ->dev = dev;
occ->sbefifo = dev->parent;
mutex_init(&occ->occ_lock);
@@ -575,7 +625,14 @@ static int occ_remove(struct platform_device *pdev)
}
static const struct of_device_id occ_match[] = {
- { .compatible = "ibm,p9-occ" },
+ {
+ .compatible = "ibm,p9-occ",
+ .data = (void *)occ_p9
+ },
+ {
+ .compatible = "ibm,p10-occ",
+ .data = (void *)occ_p10
+ },
{ },
};
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-24 00:39:52 +0000