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facetimehd: add function to send debug commands to the firmware

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This commit is contained in:
Sven Schnelle
2015-11-30 11:49:59 +01:00
parent 67f5198a17
commit cf1e7c2dfb
2 changed files with 72 additions and 0 deletions
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69
fthd_isp.c
View File

@@ -338,6 +338,75 @@ out:
return ret;
}
int fthd_isp_debug_cmd(struct fthd_private *dev_priv, enum fthd_isp_cmds command, void *buf,
int request_len, int *response_len)
{
struct isp_mem_obj *request;
struct isp_cmd_hdr cmd;
u32 address, request_size, response_size;
u32 entry;
int len, ret;
memset(&cmd, 0, sizeof(cmd));
if (response_len) {
len = max(request_len, *response_len);
} else {
len = request_len;
}
len += sizeof(struct isp_cmd_hdr);
pr_debug("sending debug cmd %d to firmware\n", command);
request = isp_mem_create(dev_priv, FTHD_MEM_CMD, len);
if (!request) {
dev_err(&dev_priv->pdev->dev, "failed to allocate cmd memory object\n");
return -ENOMEM;
}
cmd.opcode = command;
FTHD_S2_MEMCPY_TOIO(request->offset, &cmd, sizeof(struct isp_cmd_hdr));
if (request_len)
FTHD_S2_MEMCPY_TOIO(request->offset + sizeof(struct isp_cmd_hdr), buf, request_len);
ret = fthd_channel_ringbuf_send(dev_priv, dev_priv->channel_debug,
request->offset, request_len + 8, (response_len ? *response_len : 0) + 8, &entry);
if (ret)
goto out;
if (entry == (u32)-1) {
ret = -EIO;
goto out;
}
ret = fthd_channel_wait_ready(dev_priv, dev_priv->channel_debug, entry, 20000);
if (ret) {
if (response_len)
*response_len = 0;
goto out;
}
FTHD_S2_MEMCPY_FROMIO(&cmd, request->offset, sizeof(struct isp_cmd_hdr));
address = FTHD_S2_MEM_READ(entry + FTHD_RINGBUF_ADDRESS_FLAGS);
request_size = FTHD_S2_MEM_READ(entry + FTHD_RINGBUF_REQUEST_SIZE);
response_size = FTHD_S2_MEM_READ(entry + FTHD_RINGBUF_RESPONSE_SIZE);
/* XXX: response size in the ringbuf is zero after command completion, how is buffer size
verification done? */
if (response_len && *response_len)
FTHD_S2_MEMCPY_FROMIO(buf, (address & ~3) + sizeof(struct isp_cmd_hdr),
*response_len);
pr_info("status %04x, request_len %d response len %d address_flags %x\n", cmd.status,
request_size, response_size, address);
ret = 0;
out:
isp_mem_destroy(request);
return ret;
}
int fthd_isp_cmd_start(struct fthd_private *dev_priv)

3
fthd_isp.h
View File

@@ -765,4 +765,7 @@ extern int fthd_isp_cmd_channel_hue_set(struct fthd_private *dev_priv, int chann
extern int fthd_isp_cmd_channel_buffer_return(struct fthd_private *dev_priv, int channel);
extern int fthd_start_channel(struct fthd_private *dev_priv, int channel);
extern int fthd_stop_channel(struct fthd_private *dev_priv, int channel);
extern int fthd_isp_debug_cmd(struct fthd_private *dev_priv, enum fthd_isp_cmds command, void *buf,
int request_len, int *response_len);
#endif