Commit graph

6 commits

Author SHA1 Message Date
Markus Mayer
fee5f1ef6c memory: brcmstb: dpfe: support new way of passing data from the DCPU
The DCPU can now send message data in two ways:
  - via the data RAM, as before (this is now message type 0)
  - via the message RAM (this is message type 1)

In order to support both methods, we check the message type of the
response (bits 31:28) and then treat the offset (bits 27:0)
accordingly.

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2018-02-23 10:56:59 -08:00
Markus Mayer
9f2c4d95e0 memory: brcmstb: dpfe: fix type declaration of variable "ret"
In some functions, variable "ret" should be ssize_t, so we fix it.

Fixes: 2f330caff5 ("memory: brcmstb: Add driver for DPFE")
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2018-02-23 10:56:31 -08:00
Markus Mayer
69d7d95452 memory: brcmstb: dpfe: properly mask vendor error bits
We were printing the entire 32 bit register rather than just the lower
8 bits. Anything above bit 7 is reserved and may be any random value.

Fixes: 2f330caff5 ("memory: brcmstb: Add driver for DPFE")
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2018-02-23 10:56:07 -08:00
Markus Mayer
a56d339e8c memory: brcmstb: dpfe: skip downloading firmware when possible
We want to skip downloading the DPFE firmware from Linux if it was
already downloaded by the boot loader.

The driver now checks if the DCPU is already running and, if so,
whether it can process commands. If the DCPU processes commands
successfully, the driver skips the firmware download step.

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2017-10-06 16:19:14 -07:00
Markus Mayer
d56e746f4b memory: brcmstb: dpfe: introduce is_dcpu_enabled()
In order to check whether or not the DCPU is running, we introduce
a function called is_dcpu_enabled().

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2017-10-06 16:18:46 -07:00
Markus Mayer
2f330caff5 memory: brcmstb: Add driver for DPFE
This driver allows access to DRAM properties, such as the refresh rate,
via the Broadcom STB DDR PHY Front End (DPFE). The refresh rate can be
used as indirect indicator of the DRAM temperature.

The driver also allows setting of the sampling interval.

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2017-09-18 11:59:39 -07:00