Commit graph

11 commits

Author SHA1 Message Date
Dominic Rath
b4c80f245b ram: k3-ddrss: Fix register name and explain its usage
The k3-ddrss driver wants to configure the DDRSS_V2A_CTL_REG to reflect
the maximum possible SDRAM of 2 GB for AM64x (instead of the register's
default that says 8 GB, which the AM64x DDR controller wouldn't support).

The offset 0x20 was correct, but the register name DDRSS_V2A_R1_MAT_REG
was that of the next register at offset 0x24.

Signed-off-by: Dominic Rath <rath@ibv-augsburg.net>
2022-04-20 11:14:39 -04:00
Dave Gerlach
f861ce90ca ram: k3-ddrss: Introduce ECC Functionality for full memory space
Introduce ECC Functionality for full memory space as implemented in the
DDRSS. The following is done to accomplish this:

 * Introduce a memory region "ss" to allow dt to provide DDRSS region,
   which is not the same as "ctl" which is the controller region.

 * Introduce a "ti,ecc-enable" flag which allows a memorycontroller
   instance to enable ecc.

 * Introduce functionality to properly program the DDRSS registers to
   enable ECC for the full DDR memory space if enabled with above flag.

 * Expose a k3_ddrss_ddr_fdt_fixup call to allow fixup of fdt blob to
   account from DDR memory that must be reserved for ECC operation.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2022-04-04 19:02:04 -04:00
Dave Gerlach
71eb527476 ram: k3-ddrss: Rename ddrss_ss_regs to ddrss_ctl_regs
The current address being read from dt actually represents the ddrss_ctl
memory region, while ddrss_ss region is something else. Introduce
ddrss_ctl_regs and use it to free up ddrss_ss_regs for its proper
purpose later so that we can avoid confusion.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2022-04-04 19:02:04 -04:00
Aswath Govindraju
a48fc5cc6f ram: k3-ddrss: Add support for configuring MSMC subsystem in case of Multiple DDR subsystems
In Multi DDR subystems with interleaving support, the following needs to
configured,

- interleaving granular size and region
- EMIFs to be enabled
- EMIFs with ecc to be enabled
- EMIF separated or interleaved
- number of cycles of unsuccessful EMIF arbitration to wait before
  arbitrating for a different EMIF port, by default set to 3

Add support for configuring all the above by using a MSMC device

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
2022-02-08 09:41:26 -05:00
Aswath Govindraju
1a99bec018 ram: k3-ddrss: Add support for multiple instances of DDR subsystems
The current driver only supports single instance of DRR subsystem. Add
support for probing multiple instances of DDR subsystem.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
2022-02-08 09:41:26 -05:00
Aswath Govindraju
3e3d836f92 ram: k3-ddrss: lpddr4_structs_if.h: Add a pointer to ddr instance
Add a pointer to ddr instance int the lpddr4_privatedata_s structure for
supporting mutliple instances of DDR in the drivers.

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
2022-02-08 09:41:26 -05:00
Wolfgang Denk
0cf207ec01 WS cleanup: remove SPACE(s) followed by TAB
Signed-off-by: Wolfgang Denk <wd@denx.de>
2021-09-30 09:08:16 -04:00
Lokesh Vutla
2ce6dedf0b ram: k3-ddrss: Enable vtt regulator if present
Attempt to get and enable a vtt regulator if one is provided from the
dts. If we do not find one, continue as not all platforms have this.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2021-05-12 16:30:52 +05:30
Dave Gerlach
9f9b5c1c16 ram: k3-ddrss: Introduce support for AM642 SoCs
Introduce support for the AM64 DDRSS controller which uses the 16bit
variation of the controller. This controller shares much functionality
with the existing J721e support, so this patch introduces only the new
code needed for am64 specific support from "_16bit_" files with headers
under "16bit/" include path/.

Also add a CONFIG_K3_AM64_DDRSS option to the choice required for use
with CONFIG_K3_DDRSS to allow selecting AM64 support.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2021-05-12 16:30:52 +05:30
Dave Gerlach
a8c13c777e ram: k3-ddrss: Introduce common driver with J7 SoC support
Introduce a new version of the ddr driver which has the ability to
support different variations of the controller. Also introduce support
for the 32bit variation of the controller which is what was already
supported by the previous version used for J721e and J7200.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2021-05-12 16:30:52 +05:30
Dave Gerlach
67124b9a74 ram: k3-j721e: Rename to k3-ddrss
Rename the k3-j721e folder under drivers/ram to k3-ddrss in preparation
of introducing additional support for other platforms to the same
driver.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
2021-05-12 16:30:52 +05:30